ОПТИЧЕСКАЯ СИСТЕМА ДЛЯ ОФТАЛЬМОЛОГИЧЕСКОГО ХИРУРГИЧЕСКОГО ЛАЗЕРА

Изобретение относится к медицинской технике. Лазерная система для офтальмологической хирургии включает источник лазерного излучения для генерирования импульсного лазерного луча; XY-сканер для приема импульсного лазерного луча и для испускания сканирующего по направлениям XY луча, просканированного в двух направлениях, поперечных направлению Z; Z-сканер в корпусе сканера для приема луча, сканирующего по направлениям XY, и для испускания сканирующего по направлениям XYZ луча, сканировавшего дополнительно по направлению Z, зеркало для отклонения сканирующего по направлениям XYZ луча, принятого от Z-сканера; и объектив в корпусе объектива для приема отклоненного сканирующего по направлениям XYZ луча и для фокусировки принятого сканирующего по направлениям XYZ луча на целевую область, где корпус сканера отделен от корпуса объектива. Изобретение позволяет выполнять хирургические вмешательства на хрусталике глаза. 5 з.п. ф-лы, 12 табл., 19 ил.

УСТАНАВЛИВАЕМОЕ НА ГОЛОВЕ УСТРОЙСТВО ОТОБРАЖЕНИЯ И ВЫПОЛНЯЕМЫЙ ИМ СПОСОБ

Изобретение относится к устанавливаемому на голове устройству отображения. Устанавливаемое на голове устройство (100) отображения, выполненное с возможностью ношения пользователем (121), содержит: по меньшей мере частично прозрачный дисплей (101), обращенную вперед видеокамеру (102), выполненную с возможностью захвата первого изображения сцены реального мира, обращенную к глазам видеокамеру (103), выполненную с возможностью захвата второго изображения отражения сцены реального мира роговицей (123) пользователя, и средство (104) обработки. Средство (104) обработки выполнено с возможностью выбора калибровочного объекта из одного или более объектов реального мира или их частей (130-135), видимых как на первом изображении, так и на втором изображении, и получения калибровочного преобразования для вычисления позиции отображения на основе позиции в реальном мире с использованием выбранного объекта реального мира, который видим как на первом изображении, так и на втором изображении, так чтобы ...

АПОХРОМАТИЧЕСКИЙ ОБЪЕКТИВ

Апохроматический объектив, содержащий три компонента, второй из которых состоит из двояковыпуклой и двояковогнутой линз и положительного мениска, третий - из двояковыпуклой и двояковогнутой линз, отличающийся тем, что первый компонент представляет собой одиночную двояковыпуклую линзу, линзы выполнены из двух марок оптического стекла, показатели преломления и коэффициенты дисперсии которых удовлетворяют условию 1,45 Подробнее

КОМПАКТНАЯ СИСТЕМА ДИСПЛЕЯ, УСТАНАВЛИВАЕМАЯ НА ГОЛОВЕ

ОПТИЧЕСКАЯ СИСТЕМА ДЛЯ ОФТАЛЬМОЛОГИЧЕСКОГО ХИРУРГИЧЕСКОГО ЛАЗЕРА

... 1. Лазерная система для офтальмологической хирургии, содержащая: источник лазерного излучения для генерирования импульсного лазерного луча; XY-сканер для приема импульсного лазерного луча и для испускания сканирующего по направлениям XY луча, просканированного в двух направлениях, поперечных направлению Z; Z-сканер в корпусе сканера для приема луча, сканирующего по направлениям XY, и для испускания сканирующего по направлениям XYZ луча, сканировавшего дополнительно по направлению Z, зеркало для отклонения сканирующего по направлениям XYZ луча, принятого от Z-сканера; и объектив в корпусе объектива для приема отклоненного сканирующего по направлениям XYZ луча; и для фокусировки принятого сканирующего по направлениям XYZ луча на целевую область, где корпус сканера отделен от корпуса объектива.2. Лазерная система по п.1, в которой корпус сканера отделен от корпуса объектива, по меньшей мере, механически и функционально.3. Лазерная система по п.1, в которой Z-сканер включает: первый блок расширителя ...

ОПТИЧЕСКАЯ СИСТЕМА ДЛЯ ОФТАЛЬМОЛОГИЧЕСКОГО ХИРУРГИЧЕСКОГО ЛАЗЕРА

... 1. Лазерная система для офтальмологической хирургии содержит: источник лазерного излучения для получения хирургического импульсного лазерного луча, XY-сканер для сканирования по направлениям XY хирургическим импульсным лазерным лучом в поперечных направлениях, Z-сканер для сканирования по направлению Z, сканировавшим по направлениям XY хирургическим импульсным лазерным лучом, по оптической оси, один или более вспомогательных оптических блоков, генерирующих вспомогательный свет, и объектив для обеспечения общего оптического канала для сканирующего по направлениям XYZ хирургического лазерного луча и вспомогательного света через группу линз объектива в хирургическую целевую область, где линзы группы линз объектива не перемещаются относительно друг друга, и объектив не выполняет функцию динамического сканирования по направлению Z.2. Лазерная система по п.1, в которой объектив сконфигурирован для регулирования, по меньшей мере, одного из сферической аберрации, комы и аберраций высшего порядка ...

Optisches System aus refraktiven und diffraktiven optischen Elementen zur Korrektur chromatischer Aberrationen

Anordnung zur Korrektur von Abbildungsfehlern an einem Mikroskop

Die Erfindung betrifft eine Anordnung zur Korrektur von Abbildungsfehlern über das Sichtfeld variierender Aberrationen einer Probenfläche an einem Mikroskop, umfassend ein Objektiv (OL), eine Tubuslinse (TL), eine Bildgebungsoptik (BGO), eine im Strahlengang liegende Pupillenblende (PE1) sowie mindestens ein optisches Element zur optisch-geometrischen Trennung verschiedener Bildfeldregionen (ROI1, ROI2), wobei das optische Element zur optisch-geometrischen Trennung verschiedener Bildfeldregionen (ROI1, ROI2) in oder nahe der Zwischenbildebene (ZBE) angeordnet ist. Jedes Einzelelement des optischen Elementes zur optisch-geometrischen Trennung verschiedener Bildfeldregionen (ROI1, ROI2) führt eine, durch die Ausmaße des abgedeckten Bereiches des Zwischenbildes definierte Pupillenabbildung durch, so dass eine Verteilung von Unterpupillen (P1, P2) entsteht, wobei jede Unterpupille (P1, P2) der Winkelverteilung aus der zugehörenden Bildfeldregion (ROI1, ROI2) zugeordnet ist.

Vorrichtung, Bildverarbeitungsvorrichtung und Verfahren zur optischen Abbildung

Es wird eine optische Vorrichtung zur Abbildung mit mindestens einem Mikrolinsenfeld mit mindestens zwei Mikrolinsen und einem Bildsensor mit mindestens zwei Bilddetektorenmatrizen beschrieben. Die zumindest zwei Bilddetektorenmatrizen umfassen jeweils eine Mehrzahl von Bilddetektoren und es besteht eine Zuordnung zwischen den Bilddetektorenmatrizen und den Mikrolinsen, so dass jede Mikrolinse zusammen mit einer Bilddetektorenmatrize einen optischen Kanal bildet. Die Mittelpunkte der Bilddetektorenmatrizen sind lateral unterschiedlich weit gegenüber auf die Bilddetektorenmatrizen projizierten Flächenschwerpunkten der Mikrolinsenaperturen der zugehörigen optischen Kanäle verschoben, so dass die optischen Kanäle unterschiedliche teilweise überlappende Erfassungsbereiche aufweisen und dass ein Überlappbereich der Erfassungsbereiche zweier Kanäle im Hinblick auf ein Bilddetektorraster der Bilddetektorenmatrizen versetzt auf die Bilddetektorenmatrizen abgebildet wird. Weiterhin werden eine Bildverarbeitungsvorrichtung ...

Projektionssystem für Displayanwendungen

Projektionssystem (100) zur Abbildung eines Objekts (12) in eine Bildebene (ZE), umfassend eine erste Baugruppe (10), eine zweite Baugruppe (20) und eine dritte Baugruppe (30), wobei jede der Baugruppen (10, 20, 30) mindestens eine zusammenhängende gemeinsame optische Achse (O1, O2, O3) aufweist und wobei die erste Baugruppe (10) das Objekt (12) und die zweite Baugruppe (20) ein optisches Bauteil (22) umfasst, wobei mindestens zwei der Baugruppen (10, 20) zueinander verkippt und/oder versetzt angeordnet sind und die optischen Achse (O3) der bildseitigen Baugruppe (30) gegenüber der optischen Achse (OE) des Bildes (E) in der Bildebene (ZE) geneigt ist, dadurch gekennzeichnet, dass es sich bei dem Objekt (12) um einen reflektierenden Bildgeber (14) handelt, der von der objektseitigen zweiten Baugruppe (20) beleuchtet und abgebildet wird.

SICHTGERAET FUER EINE VORAUSSCHAUANZEIGE (HEAD-UP-ANZEIGE)

Verfahren und Mikroskop mit einer Korrekturvorrichtung zur Korrektur von aberrationsinduzierten Abbildungsfehlern

Zur Korrektur von aberrationsinduzierten Abbildungsfehlern eines optischen Systems, das ein Objektiv (14) und eine adaptive Optik (18) aufweist, werden Licht (5) und eine Probe (20) so ausgewählt, dass das Licht (5) beim Einwirken auf die Probe (20) ein Messsignal (28) aus der Probe (20) reduziert, wobei eine relative Änderung des Messsignals (28) von einer Intensität des Lichts (5) abhängt. Das Messsignal (28) aus einem Fokusbereich des optischen Systems in der Probe (20) wird über einen ersten und einen späteren zweiten Zeitraum (38, 37) erfasst, um einen ersten und einen zweiten Messwert zu bestimmen. Über einen mit dem ersten und/oder zweiten Zeitraum überlappenden dritten Zeitraum (39), wird das Licht (5) mit dem optischen System in den Fokusbereich fokussiert. Aus dem ersten und dem zweiten Messwert wird eine Maßzahl für die relative Änderung des Messsignals (28) bestimmt und beim Ansteuern der adaptiven Optik (18) als zu optimierende Metrik verwendet.

Abbildungssystem, Programm zur Kontrolle der Bilddaten dieses Systems, Verfahren zur Korrektur von Verzerrungen von aufgenommenen Bildern dieses Systems und Aufzeichnungsmedium zur Speicherung von diesem Verfahren

Dreilinsiges Objektiv mit guter Korrektion des sekundaeren Spektrums

A method for manufacturing an achromatic diffraction grating with increased efficiency has a triangular rectangle of one part separated and attached to the triangular substrate part

The first grating part (14a,14b) is separated at the median point of the smallest side and the hypotenuse and the resulting triangular rectangle (14b) positioned (34) on the substrate material (12) leaving a gap such that the light path (36) through the grating is unchanged.

Micro lens array and imaging apparatus

Improvements in and relating to ophthalmoscopes

Visual simulation using 'pin-cushion' and 'barrel' distortion

Apparatus for producing an image for visual simulation, for example, for virtual reality systems, comprises a display 10 having substantially uniform resolution across the field of view, and means for displaying an intermediate image of a source on the display so that a first portion of the source occupies a disproportionately larger fraction of the intermediate image than a second portion 'barrel distortion' 20. An optical system 14 for imaging the display restores the original proportionality between the first and second portions displayed in the intermediate images by 'pin-cushion distortion' 22 so that the first portion is imaged with a higher resolution than the second portion. Preferably, the higher resolution region has a resolution greater than or equal to the limit of resolution of an observer's eye.

Improvements in thermal imagers

OPTICAL SYSTEM OF OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS

An optical system of an optical information recording/reproducing apparatus including a light source (10) for emitting a generally parallel luminous flux; an objective optical system for converging the luminous flux emitted from said light source portion onto a medium; a beam splitter (30) for splitting the luminous flux reflected by said medium from a light path directed to the light source portion and guiding the same to a light receiving system (40); a chromatic aberration correcting element (23) having almost no power disposed between said objective lens and said beam splitter and adapted to correct a chromatic aberration of said objective lens; and means for independently actuating said objective lens at least in an optical axis direction thereof.

Aberration correcting plate for interchangeable lens

Display device with chromatic aberration correction

A head-up or helmet-mounted display device comprises an image source 1 emitting an image in two different spectral bands and relay optics 10 having an optical element 15. The optical element 15 has a thin plate 151 with a first side 152 having a first treatment reflecting the first spectral band and transmitting the second spectral band, and a second side 153 comprising a second treatment reflecting the second spectral band. The thickness of the plate is such as to cause cancellation of the axial chromatic aberration generated by the other optical elements composing the relay optics. The optical element may comprise a succession of thin plates bonded together and may be a plane mirror or a prism.

Dynamic variable shape optical element assembly and focus correction method

A dynamic variable shape optical element assembly 101 e.g. a mirror is used for wavefront correction. The variable shape optical element assembly includes an optical element 206, having a front surface 210 and a back surface 208, with specified curvature characteristics. The variable shape optical element assembly also includes back knife edges 202 having a designated shape disposed on the back surface of the optical element and front knife edges 204 having a designated shape disposed on the front surface of the optical element. The variable shape optical element assembly further includes a mechanical arrangement (308, 310, 314 in figure 3) adapted to apply a dynamic mechanical force to create the specified curvature characteristics. Also claimed is a focus correction method.

Field mapper

An optical system 10 converts a light beam having a known spatially coherent first optical field 14, such as a Gaussian field, to a second optical field 22 with a required intensity distribution and flat wavefront at a desired distance from the system. It does this by creating an intermediate optical field 30, between the first and second optical fields. The intermediate optical field is derived from the inverse Fourier transform of the second optical field. The optical system provides a field mapper. The system includes one or more transmissive refractive optical elements such as a phase plate, arranged to provide a first optical section 25 and a second optical section 26. A focussing lens (figure 2, 132) may be used to provide the required beam at focal plane 24.

LIGHT-SHIELD PLATE EXPOSURE CORRECTING DEVICE

Wavefront reconstruction using a coherent reference beam

... 1,104,041. Making holograms. BATTELLE DEVELOPMENT CORPORATION. March 22, 1965 [April 23, 1964], No. 12034/65. Heading G2C. A method of lenslessly producing images comprises directing a beam of coherent radiation from a source on to an object; positioning a detector to receive the reflected radiation from the object, which reflected radiation interferes with a portion of the coherent beam directed on to the detector after by-passing the object; and treating the detector so that at least one image of the object is recorded thereby. When the detector is a photographic plate, the wavelength of the radiation used lies between 10-11 cms. and 10-1 cms., a laser preferably being used to produce coherent radiation in the visible spectrum. In Figs. 7, 9 a two-beam inter-ferometric process is used to produce a hologram on a photographic plate 33. Part of an incident beam 23 of light from a laser 21 passes through a diffusion screen 28 and a transparent object 25 producing a beam ...

Improvements in and relating to the Formation and Reconstruction of Holograms

... 1,171,443. Holography. BATTELLE DEVELOPMENT CORP. Oct.21, 1966 [Oct.23, 1965], No.26294/69. Heading G2C. In forming a coded hologram an object 407, Fig. 1, is illuminated with a beam 401 of coherent radiation to form a first object hearing beam 415 for impinging on a detector 413, and a second reference beam 411 of radiation is provided which is coherent with beam 401 and may be provided by mirrors 405, 409, from the same laser source 403, so as to form a hologram at the detector 413, there being a translucent material 417 disposed in the path of at least one of the beams to impart the code to the hologram. If the translucent material 417 is placed a distance d 2 in front of detector 413 in the reference beam 411, the same, or an identical translucent material (417, Fig.2 not shown) is placed an equivalent distance from the hologram (413') in the illuminating beam (401') when reconstructing the hologram. Alternatively the translucent material (417) may be placed in the path of the object ...

Improvements in or relating to colour-selective optical systems corrected for astigmatism

... 856,932. Optical systems. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 21, 1957 [Feb. 24, 1956], No. 5889/57. Class 97(1) A colour beam-splitter corrected for astigmatism comprises a system of dichroic plane mirrors positioned inclined to one another so that considered from the direction of incident light, the first colour-selective layer is provided on the front side of a transparent plane-parallel plate having a thickness d1 and refractive index n1 and making an angle a1 with the optical axis, whilst the second colour selective layer is provided on the rear side of a second transparent plane-parallel plate of thickness d2 and refractive index n2 and making an angle a2 with the axis, and a third transparent plane-parallel plate of thickness d3 and refractive index n3 and making an angle a3 with the axis, the incident planes of the second and third plates each being displaced about the axis through an angle of approximately 90 degrees with respect to the incident plane of the first plate and ...

TELEPHOTO LENS SYSTEM

MTF IMPROVED OPTICAL SYSTEM, WHICH USES PHASE MASKS WITH UNCHANGED PHASE WITHIN A MIDDLE RANGE

OBJECTIVELY

PROCEDURE FOR THE PRODUCTION OF LENSES WITH A LAYER WITH VARIABLES A REFRACTIVE INDEX AND A LENS

MINIATURE ENDOSCOPE WITH PICTURE-GIVING FIBER SYSTEM

OBJEKTIV

ABERRATION CORRECTION FOR THE SPECTROSCOPIC ANALYSIS

PROCEDURE FOR THE PRODUCTION OF AN OPTICAL SYSTEM, WHICH CONTAINS A PROCESSOR FOR ELECTRONIC PICTURE IMPROVEMENT

OPTIMIZED IMAGE PROCESSING FOR WAVE FRONT-CODED IMAGING SYSTEMS

PROCEDURE AND DEVICE AS WELL AS OPTICAL CORRECTION SYSTEM FOR THE EVALUATION A TO RESTORATION INTENDED LENS

RASTER OBJECTIVE AND RASTER RADIATION TRANSFORMER AS WELL AS OPTICAL SWEEP DEVICE WITH AT LEAST ONE OF THESE ELEMENTS

Sphericalally, chromatically and astigmatisch corrected single objective.

VISUAL DISPLAY SYSTEM.

ANTI- ALIASING DEVICE AND OPTICAL ILLUSTRATION PROCEDURE

APPARATUS AND METHOD OF CORRECTING HIGHER-ORDER ABERRATIONS OF THE HUMAN EYE

DISTORTED PUPIL RELAY FOR SPECTRAL FILTERING

A system and method for spectral filtering of images are provided. The system and method utilize a first biconic lens surface to astigmatize a substantially 2-D system pupil into a substantially 1-D pupil (e. g., slit-shaped), and a second biconic lens surface to restore the astigmatic pupil to good quality. Advantageously, the light stream may be filtered with a variable filter.

ARRANGEMENT FOR COMPENSATING FOR THE EXCURSION OF A LASER BEAM

The invention is directed to an arrangement for compensating for offset and angular errors of a laser coupled into a processing machine or measuring machine. The laser is mounted separately from the machine. The arrangement includes two adjustable mirrors by means of which the beam position at the coupling point is maintained constant. The corrective signal is generated by quadrant detectors cooperating with the adjustable mirrors arranged in the path of the laser beam. The detectors are arranged to receive rays of light diverted from the path of the laser beam. One of the detectors is preceded by a collimator causing the detector to respond only to angular errors. 14 ...

METHOD OF DECODING A CODED OFF-AXIS HOLOGRAM

SPATIAL AND SPECTRAL FILTERING APERTURES AND OPTICAL IMAGING SYSTEMS INCLUDING THE SAME

SYSTEMS AND METHODS OF BIOMETRIC ACQUISTION USING POSITIVE OPTICAL DISTORTION

The present disclosure describes systems and methods for acquiring a biometric image. A biometric camera system can position a lens of a biometric camera between a pixel array of the biometric camera and an iris. The pixel array can acquire an image of the iris using light reflected from the iris and transmitted through the lens of the biometric camera. The lens can increase a pixels per iris (PPi) value of the image of the iris acquired by the pixel array, by applying optical positive distortion to the light reflected from the iris when the light is optically directed through the lens. A processor can provide a biometric image for biometric matching, by image-processing the acquired image of the iris having the increased PPi value, with an inverse function of the optical positive distortion.

BIOCULAR COMPACT COLLIMATION APPARATUS

A compact, lightweight, multi-wavelength display system which can be used for simultaneous viewing with both eyes is provided. The system utilizes a field flattener lens to remove abrasions introduced by the system's lenses. The system also uses a polarization selective optical element that reflects one linear polarization state while transmitting radiation of the orthogonal linear polarization state. The PS element is used in combination with a quarter wave plate and an optical element, the optical element including a partially reflective surface. The optical element may either be a single element or an optical doublet. In the latter configuration, the partially reflective surface is at the interface between the two singlets that comprise the doublet. The system also includes an image source that either alone, or in combination with other optical elements, produces circularly polarized light of the desired rotary sense.

IMAGE DISPLAY AND ALIGNMENT ADJUSTING METHOD

An image display comprises a refractive optical lens (15) for directing light from transmitting means to a convex mirror (16) and correcting the pincushion distortion aberration of the convex mirror (16).

HIGH-ORDER ABERRATION CORRECTION FOR OPTIMIZATION OF HUMAN VISUAL FUNCTION

The present invention relates to the optimization of human visual function by correcting and/or optimizing high-order optical aberrations in high performance optical devices. The optimization is particularly useful for high performance devices used under low light conditions such as binoculars, rifle scopes, telescopes, microscopes, night vision goggles and laser eye protection devices.

DEVICE FOR COMPENSATING FOR THE DRIFT OF A PHASE SHIFT OF A DEVICE FOR MODULATING THE POLARIZATION STATE OF A LIGHT BEAM

ABRÉGÉ Un dispositif d'analyse et/ou de génération d'un état de polarisation d'un point de mesure d'un objet cible, le dispositif comprend : - un polariseur propre à sélectionner, dans une onde lumineuse incidente, un faisceau lumineux polarisé rectilignement selon une direction prédéfinie, - un premier élément biréfringent propre à être traversé par ledit faisceau lumineux, - un deuxième élément biréfringent identique au premier élément et propre à être traversé par ledit faisceau lumineux, ledit faisceau lumineux étant alors destiné à être dirigé directement ou indirectement vers ledit objet pour être réfléchi sous la forme d'un faisceau réfléchi. En outre, l'ensemble optique, constitué d'un ou plusieurs éléments optiques, est situé sur un trajet optique compris entre le premier élément et le deuxième élément, l'ensemble optique étant constitué de : - un nombre impair de miroirs, ou, - un nombre impair de lames demi-onde, ou, - un nombre confondu impair de miroirs et lames demi-onde.

Farbselektives, auf Astigmatismus korrigiertes optisches System

Verfahren und Einrichtung zur Beseitigung störender Beugungseffekte an durch Wellen erzeugten Darstellungen

Vorrichtung zur Kompensation der chromatischen Aberrationen von optischen Systemen

Procédé de production d'une copie d'un hologramme

Dreilinsiges Objektiv mit einem Restfehler des sekundären Spektrums von 0,000024

Procédé de production d'images et appareil pour sa mise en oeuvre

Viergliederiges photographisches Objektiv

Zoom lens systems with wavefront coding

The present invention discloses zoom lens systems and methods for imaging incoming rays over a range of ray angles. The incoming rays are characterized by at least phase. The zoom lens system includes an optical axis and is characterized by a plurality of modulation transfer functions (MTFs) corresponding at least to the range of ray angles. The zoom lens system includes an optical group disposed along the optical axis, including at least one variable optical element that has a variable focal length selectable between at least two distinct focal length values. The optical group also includes a wavefront coding element. The wavefront coding element alters at least the phase of the incoming rays, such that the plurality of MTFs corresponding to the range of ray angles, for each one of the two distinct focal length values, are less sensitive to misfocus-like aberrations than a corresponding system without the wavefront coding element.

Imaging lens

System and method for metrology light beam stabilization

Camera shooting optical lens

Optical fingerprint collection device

The invention provides an optical fingerprint collection device, which comprises an improved optical lens assembly which is capable of correcting deformation of images caused by a light refractor. The optical lens assembly comprises two cylindrical lenses, and the optical axis of incident light does not overlap the central axes of the lenses. The optical lens assembly corrects the images which are deformed to be rectangular because of the light refractor and enables the images to return to be square. It should be pointed out that the optical fingerprint collection device can be used for collecting the fingerprint of one finger and for collecting the fingerprints of all the fingers simultaneously.

Device and method for homogenizing optical beams

Zoom lens and imaging device

Optical imaging system

Camera lens

Image pickup optical lens

COMPENSATOR VARIABLE DIFFERENT ORDERS OF SPHERICAL ABERRATION FOR CHECKING THE SHAPE OF THE SURFACE OF AN ASPHERIC MIRROR AND ITS APPLICATION

DISPLAY DEVICE FOR HEAD-UP DISPLAY Head high

OPTOELECTRONIC EQUIPMENT AIRBORNE, IDENTIFICATION AND LOCATION WITH WINDOW HAS FACETS COMPENSATES.

TELESCOPE DIOPTRIQUE A PLUSIEURS GROUPES DE LENTILLES A SURFACES SPHERIQUES

UN TELESCOPE DIOPTRIQUE COMPORTE SUCCESSIVEMENT, SUR LE TRAJET DE LA LUMIERE, TROIS GROUPES DE LENTILLES A DISTANCE L'UN DE L'AUTRE. LES PREMIER ET SECOND GROUPES 10, 20 SONT CONVERGENTS ET LE TROISIEME 30 DIVERGENT. LES DEUX PREMIERS GROUPES PRESENTENT CHACUN UNE CORRECTION D'APOCHROMATISME ET LES TROIS GROUPES SONT PROPORTIONNES POUR PRESENTER UNE COMPENSATION GLOBALE DES ABERRATIONS GEOMETRIQUES.

Reconstituting front waves by the use of a reference beam of coherent light,

METHOD FOR OPTIMIZING A CORRECTED INFRARED LENS ARCHITECTURE DERIVATIVES OF THERMAL AND ACHROMATISEE IMAGE PICKUP AND SYSTEM THEREFOR

DEVICE FOR CORRECTING AT LEAST ONE ABERRATION KNOWN DEFORMABLE MIRROR EVOLUTION

DEVICE FOR COMPENSATING FOR TIME DISPERSION APPLIED TO THE GENERATION OF ULTRA-SHORT LIGHT PULSES.

COMPACT FOUR ELEMENT PHOTOGRAPHIC OBJECTIVE LENS

DISPLAY SYSTEM HAS FILTER OF CORRECTION

Le domaine général de l'invention est celui des systèmes de visualisation comportant un dispositif de traitement d'images (E), l'image avant traitement étant notée image initiale et l'image après traitement étant noté image traitée, un afficheur (D) présentant l'image traitée par le dispositif de traitement d'images et un dispositif de visualisation comportant : - une première optique (L1) faisant de l'image traitée une image intermédiaire, ladite première optique comportant une pupille (P) ; - une seconde optique (L2) faisant de l'image intermédiaire une image collimatée destinée à être présentée à un utilisateur, ladite seconde optique agencée de façon à former une image de la pupille au niveau de l'œil (Y) de l'observateur, ladite image étant appelé anneau oculaire (A). Le dispositif selon l'invention comporte un filtre de correction (F) disposé au niveau de la pupille et agencé de façon à assurer au moins qu'une image présentée par l'afficheur ne subisse pas d'inversion de contraste ...

SYSTEM AND METHOD FOR OPTICAL MICROSCOPY OF RAMAN SCATTERING WITH ADAPTIVE OPTICS SYSTEM

DEVICE OF CORRECTION OF the ASTIGMATISM Of an OPTICAL APPARATUS USING LIKE SOURCE OF LIGHT a SEMICONDUCTOR LASER

DEVICE OF CORRECTION Of AT LEAST an ABERRATION Of KNOWN EVOLUTION HAS DEFORMABLE MIRROR

L'invention concerne un dispositif pour corriger au moins une aberration optique, d'évolution connue d'un système optique, le dispositif comprenant: un miroir (1) déformable ayant un contour; des moyens (2) pour déformer le miroir ; caractérisé en ce que le miroir (1) est à géométrie choisie de manière telle que le contour du miroir (1) est défini à partir d'une fonction composite de ladite au moins un aberration et en ce que les moyens (2) pour déformer le miroir sont adaptés pour appliquer un moment de flexion sur les bords du miroir, le miroir déformable étant concave ou convexe quand il est déformé.

OPTICAL DEVICE ABLE TO CORRECT THE CHROMATIC ABERRATIONS

OPTICAL MODULE FIELD OF VIEW IMAGING HYPER-HEMISPHERICAL AND DISTORTION CONTROLLED, CONSISTENT AND REGULATING

L'invention concerne un module d'imagerie comportant : - un composant de tête (10) mono-pupille à champ d'entrée hyper-hémisphérique o à surface d'entrée (11) réfractive o face de sortie (12) concave, à zone centrale (122) réfractive et zone périphérique (121) réflective, o et comportant un miroir secondaire (13), - un correcteur (20) d'aberrations qui comporte une lentille asphérique, - un objectif de focalisation (30), - un diaphragme d'ouverture (50) entre le correcteur d'aberrations (20) et l'objectif (30). Le composant de tête (10) - est quasi afocal au voisinage du champ de rayon angulaire 90°, - sa surface d'entrée (11) a un 1/2 angle au sommet inférieur à 30°, - le miroir secondaire (13) est asphérique à focale locale variable avec une puissance locale maximale pour une zone utilisée par un champ de rayon angulaire 90° et minimale inférieure d'au moins un facteur 2 pour une zone utilisée par un champ de rayon angulaire inférieur à 20°.

DRIFT DEVICE FOR COMPENSATING FOR A PHASE SHIFT OF A MODULATOR OF STATE OF POLARIZATION OF A LIGHT BEAM

Un dispositif d'analyse et/ou de génération d'un état de polarisation d'un point de mesure d'un objet cible, le dispositif comprend : - un polariseur propre à sélectionner, dans une onde lumineuse incidente, un faisceau lumineux polarisé rectilignement selon une direction prédéfinie, - un premier élément biréfringent propre à être traversé par ledit faisceau lumineux, - un deuxième élément biréfringent identique au premier élément et propre à être traversé par ledit faisceau lumineux, ledit faisceau lumineux étant alors destiné à être dirigé directement ou indirectement vers ledit objet pour être réfléchi sous la forme d'un faisceau réfléchi. En outre, l'ensemble optique, constitué d'un ou plusieurs éléments optiques, est situé sur un trajet optique compris entre le premier élément et le deuxième élément, l'ensemble optique étant constitué de : - un nombre impair de miroirs, ou, - un nombre impair de lames demi-onde, ou, - un nombre confondu impair de miroirs ou lames demi-onde.

LIGHT BEAM PROJECTION DEVICE WITH SUBMATRICES OF LIGHT SOURCES, LIGHTING MODULE AND HEADLIGHT EQUIPPED WITH SUCH A DEVICE

L'invention concerne un dispositif optique de projection de faisceau lumineux, notamment pour véhicule automobile, caractérisé en ce qu'il comprend en amont selon le sens de propagation des rayons lumineux, un ensemble d'au moins deux sous-matrices (20) associées munies chacune de sources primaires (8) de lumière aptes à émettre des rayons lumineux, et en aval un système optique primaire (4) muni d'une pluralité d'optiques convergentes, au moins une optique convergente étant associée à chaque sous-matrice (20) et disposée en aval de celle-ci, l'écartement entre les axes optiques de deux optiques convergentes adjacentes correspond respectivement à l'écartement entre les centres des sous-matrices adjacentes correspondantes. L'invention a également pour objet un module optique comprenant ledit dispositif et un projecteur de véhicule automobile.

Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures

광학 모듈 어셈블리, 광학 장치 및 웨어러블 표시 장치

... 본 발명은 광학 모듈 어셈블리, 광학 장치 및 웨어러블 표시 장치에 관한 것이고, 웨어러블 표시 장치(10)는 표시 소스를 출력하기 위한 소형 표시 모듈 어셈블리(112)와, 상기 표시 소스를 확대함과 아울러 출사동(P)에 투사하기 위한 광학 모듈 어셈블리를 포함하고, 상기 광학 모듈 어셈블리는 순서대로 설치되는 포지티브 굴절력을 갖는 제1 렌즈(L1), 내거티브 굴절력을 갖는 제2 렌즈(L2) 및 포지티브 굴절력을 갖는 제3 렌즈(L3)를 포함한 제1 광학 모듈(113A)과, 제1 비구면(F7), 제2 비구면(F9) 및 제1 광학 모듈(113A)의 광경로 방향을 출사동(P) 방향으로 변경하기 위한 편향면(F8)으로 구성된 포지티브 굴절력을 갖는 제4 광학 소재(L4)를 포함한 제2 광학 모듈(113B)을 포함한다. 상기 광학 모듈 어셈블리(113)는 제한된 광학 소재를 사용하여 품질이 높은 이미지를 표시한다.

SUBMINIATURE OPTICAL SYSTEM, CAPABLE OF MINIMIZING CHROMATIC ABERRATION BY FORMING LENSES HAVING POSITIVE REFRACTIVE POWER WITH MATERIAL HAVING A LARGE ABBE NUMBER AND FORMING LENSES HAVING NEGATIVE REFRACTIVE POWER WITH MATERIAL HAVING A SMALL ABBE NUMBER

PURPOSE: A subminiature optical system is provided to obtain high solution by using an aspheric lens and reduce a weigh by forming the aspheric lens with plastic material. CONSTITUTION: A subminiature optical system includes a first lens(L1) with positive refractive power, a second lens(L2) with negative refractive power, a third lens(L3) with negative refractive power, and a fourth lens(L4) with positive refractive power in order from an object side to a front side of a top surface. At least one of surfaces of the third and fourth lenses is an aspheric surface. An optical filter(OF) is provided between the fourth lens and an image plane(IP) corresponding to an image sensor. The first and fourth lenses with the positive refractive power are made of material with a large Abbe number and the second and third lenses with the negative refractive power are made of material with a small Abbe number. © KIPO 2008 ...

CHROMATIC ABERRATION CORRECTION IMAGING OPTICAL SYSTEM

A chromatic aberration correction imaging optical system which has removed the chromatic aberration of the halo portion of a light flux in a specific wavelength region that passes through the peripheral edge of a lens system by providing a light shielding means for shielding a light flux in a specific wavelength region at a specified lens surface peripheral edge out of the above lens system. Accordingly, an imaging optical system which has chromatic aberration specially at a halo portion favorably corrected is provided without increasing the number of sheets of lens over a conventional imaging optical system having the same optical performance and without using an expensive special low-dispersion glass material. © KIPO & WIPO 2007 ...

Image capturing lens assembly, image capturing device and electronic device

An image capturing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The fifth lens element has an object-side surface being convex in a paraxial region thereof. The sixth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof and includes at least one convex shape in an off-axial region thereof. When the specific condition of the image capturing lens assembly is satisfied, characteristics of image brightness and compact size thereof can be balanced.

Optical image capturing system

The invention discloses a six-piece optical lens for capturing image and a six-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power; a sixth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Lateral color compensation for projection displays

Compensation of lateral-color chromatic-aberration effects in a digital color- graphics projection display (400) is achieved by providing projection optics (452, 652) for the projection display (400) which is nontelecentric to a certain degree to establish an angled geometry for gathering light off axis for projection by the projection optics (452, 652) and by providing a plurality of component-primary-color object planes for object digital graphics of different primary colors to be projectively displayed through the projection optics (452). At least two of the component-primary-color object planes (690 R,G,B) are located at different effective axial distances from the projection optics (452). The effective axial distances of the object planes (690 R,G,B) from the projection optics (452, 652) are respectively keyed to the angled nature of the off-axis light gathering of the projection optics(452, 652) and to the lateral-color chromatic-aberration differences in lateral magnification by ...

DEVICE AND METHOD FOR COMPENSATING COLOR DISPLACEMENTS IN FIBER OPTIC IMAGING SYSTEMS

A color value (58) for an individual fiber optic of a fiberscope can be created based on the intensity values (34) of a plurality of different-colored sensitive sensor elements (4, 6, 8) of a sensor element arrangement (10) if the calibration values are provided for each of the color ranges associated with the fiber optic (14). Using the calibration values (38) provided, the intensity values (34) of all sensor elements (4, 6, 8) of the respective color range illuminated by the fiber optic (14) can be combined in order to obtain the color value (58) associated with the fiber optic (14), which accurately renders the color of the light transported by the fiber optic (14).

APOCHROMAT AND METHOD FOR DESIGNING AN APOCHROMAT

The present invention relates to an apochromat having at least three successive converging and diverging lenses i,j,k, wherein successive lenses in terms of magnitude have substantially identical, purely spherical radii of curvature and are coupled by a joining medium which is arranged therebetween, characterized in that successive lenses are parameterized such that their refractive indices are identical or approximately identical, in that all the lenses are composed of different optical glasses and lens pairs of successive lenses i,j and j,k are selected according to the optical glass type such that for the first lens pair i,j the relative partial dispersions in the blue spectral range are identical or approximately identical and for the second lens pair j,k the relative partial dispersions in the red spectral range are identical or approximately identical, and in that the refractive index nd of the joining medium is identical or approximately identical to the refractive index nd of the ...

OPTICAL SYSTEM, AND RELATED DESIGN METHOD

The invention relates to an optical system including a lens (L) for focusing incoherent light received from an object (O) on an image plane (PI). Said optical system is set up in order to add aberrations into an incident wavefront such as to generate an aberrant wavefront. The normal deviation, between the aberrant wavefront and a perfect wavefront that would be generated from said incident wavefront by a perfect optical system having the same optical characteristics as said optical system, is capable of being modeled in the form of a weighted combination of Zernike polynomials wherein each Zernike polynomial Zi corresponds to a type of aberration and is weighted by a respective Zernike coefficient Ci, i being from 4 to 36. The Zernike coefficients have values within predetermined ranges, at the center and edge of a field, for wavelengths of 400, 550, and 700 nm.

OPTICAL CORRECTION ELEMENT AND METHOD FOR THE CORRECTION OF TEMPERATURE-INDUCED IMAGING ABERRATIONS IN OPTICAL SYSTEMS, PROJECTION OBJECTIVE AND PROJECTION EXPOSURE APPARATUS FOR SEMICONDUCTOR LITHOGRAPHY

The invention relates to a method for the correction of temperature-induced imaging aberrations of an optical system. In this case, the correction is effected using a liquid layer (24) arranged in the optical system in such a way that the imaging aberrations are compensated for by an inhomogeneous temperature distribution being formed in the liquid layer (24) through absorption of optical useful radiation. Furthermore, the invention relates to an optical correction element (21) for application in said method, and to a projection objective (7) and a projection exposure apparatus (1) having the optical correction element (21) according to the invention.

PORTABLE IMAGING SYSTEM EMPLOYING A MINIATURE ENDOSCOPE

A cart (298) or man-portable system and method for performing endoscopic procedures is provided. A portable display device, such as a laptop computer (44), is coupled to a handle (32) comprising a miniature camera (30B) and fiber optic illumination subsystem (24). A sterile disposable portion (34) is fitted over the illumination subsystem (24) and inserted into a target area on a patient. Images of the target area are conveyed from the camera (30B) to the display device (44)while an endoscopic procedure is performed, thus facilitating real-time diagnosis during the procedure.

DIGITAL CINEMA PROJECTION SYSTEM WITH INCREASED ETENDUE

A digital cinema projection apparatus having an illumination source with a first etendue value for providing polarized polychromatic light. A first lens element lies in the path of the polarized polychromatic light for forming a substantially telecentric polarized polychromatic light beam. A color separator separates the telecentric polarized polychromatic light beam into at least two telecentric color light beams. At least two transmissive spatial light modulators modulate the two telecentric color light beams. There is an etendue value associated with each spatial light modulator. The etendue value is within 15% or greater than the first etendue value corresponding to the illumination source. A color combiner combines the modulated color beams along a common optical axis, forming a multicolor modulated beam thereby; and a projection lens directs the multicolor modulated beam toward a display surface.

Space telescope system

A space telescope system includes, but is not limited to, a support platform configured to orbit astronomical object, a plurality of mirrors mounted to the support platform and spaced apart from one another, the plurality of mirrors being configured to reflect a plurality of focused beams, and a focal plane image combiner positioned to intersect the plurality of focused beams and configured to combine the plurality of focused beams to form a composite image.

Retrofocus wide-angle lens system and optical instrument provided with the same

A retrofocus wide-angle lens system is provided, wherein the entire the wide-angle lens system is divided at a position that satisfies the following condition (1) between a theoretical front lens group having a negative refractive power, and a theoretical rear lens group having a positive refractive power including the diaphragm, at a minimum focal length, and wherein a flat parallel plate is disposed at the position that satisfies the following condition (1): 1.2<|fF/f|<4.0  (1), wherein fF designates the focal length of the theoretical front lens group having a negative refractive power, and f designates the focal length of the entire the wide-angle lens system.

Non-planar focal surface lens assembly

A lens assembly includes a plurality of component lens elements, and a fiber optic face plate having a back surface and a non-planar front surface. The plurality of component lens elements are configured to direct a focused image onto the non-planar front surface of the fiber optic face plate, and the fiber optic face plate is configured to transmit the focused image through the back surface.

Endoscope Optical System

An endoscope optical system includes a negative lens that focuses light entering along an incident optical axis, a first prism that deflects and emits the light from the negative lens along a first axis substantially orthogonal to the incident optical axis, a second prism having a first reflecting surface, which deflects the light from the first prism along a second axis substantially orthogonal to the first axis and a second reflecting surface that deflects and emits the light, substantially parallel to the first axis and that faces the first prism, a third prism that deflects the light from the second prism substantially parallel to the incident optical axis, and a positive lens that focuses the light from the second prism, in this order from an object side, the negative lens and the first prism being rotatable about the first axis relative to the second prism.

Optical fingerprint acquisition apparatus

Provided is an optical fingerprint acquisition apparatus. The fingerprint acquisition apparatus has an improved optical lens unit and can correct distortion of an image caused by a light refractor. The optical lens unit includes two cylindrical lenses disposed so that an optical axis of incident light does not coincide with a central axis of the lenses. The optical lens unit corrects an image that is distorted into a rectangle by a light refractor, thereby restoring a square shape. In particular, the fingerprint acquisition apparatus is useful in the simultaneous acquisition of multiple fingerprints as well as the acquisition of a single fingerprint.

Two-dimensional imager with solid-state auto-focus

An imaging system having a solid-state auto focusing system advantageously images broadband light reflected from an object to be imaged using a lens objective having chromatic aberration, which focuses different colors of light at different focal planes. Using the color information in the focal planes in conjunction with an object distance determined by a range finder, a luminance plane is constructed that has a focused image of the object. The system provides the focused image of the object without the use of any moving parts.

Optical device with interchangeable corrective elements

Exemplary embodiments enable an enhanced direct-viewing optical device to include customized adjustments that accommodate various optical aberrations of a current user. Customized optical elements associated with an authorized current user are incorporated with the direct-viewing optical device to produce a specified change in optical wavefront at an exit pupil. Possible replacement optical elements may have refractive and/or reflective and/or diffractive and/or transmissive characteristics based on current performance viewing factors for a given field of view of the direct-viewing optical device. Some embodiments enable dynamic repositioning and/or transformation of replaceable corrective optical elements responsive to a detected shift of a tracked gaze direction of a current user. Replaceable interchangeable corrective optical elements may be fabricated for current usage or retained in inventory for possible future usage in designated direct-viewing optical devices.

Camera for recording aerial images from aircraft

A camera, more particularly for recording aerial images from aircraft, comprising a lens and at least one digital, areal image sensor fixed on a carrier element and having a predetermined pixel size, which image sensor has a curvature, more particularly caused by the fixing on the carrier element within a specific tolerance range. The lens at least partly brings about optical compensation of the curvature of the digital areal image sensor.

IMAGE PICKUP APPARATUS ELECTRONIC DEVICE AND IMAGE ABERRATION CONTROL METHOD

An optical system comprising an aberration control optical system is disclosed. An aberration control optical system is operable to produce an image aberration, and an aperture stop is operable to limit a light beam passing through the aberration control optical system. An image pickup device is operable to capture an object image passing through the aberration control optical system, and the aberration control optical system provides inflection points within a diameter of the aperture stop to obtain a depth extending effect. 1. An image pickup apparatus comprising: an aberration control optical system operable to produce aberration;', 'an aberration control section operable to extend a depth of a field;', 'an aperture stop operable to limit a light beam passing through the optical system; and', 'an image pickup device operable to capture an object image passing through the optical system,', 'wherein the aberration control optical system has an aberration curve comprising a plurality of inflection points on the aberration curve and within an aperture diameter of the aperture stop to obtain a depth extending effect., 'an optical system comprising2. The image pickup apparatus according to claim 1 , wherein an MTF for defocusing of the optical system has a plurality of peaks in a principal-image-plane shift area at an arbitrary frequency.3. The image pickup apparatus according to claim 1 , wherein the aberration curve comprises a spherical aberration curve.4. The image pickup apparatus according to claim 1 , wherein the aberration control section is located adjacent to the aperture stop.5. The image pickup apparatus according to claim 1 , wherein the aperture diameter of the aperture stop is variable claim 1 , and the aperture stop has a depth extending function that is independent of the aperture diameter.6. The image pickup apparatus according to claim 3 , wherein the aberration control section comprises at least three inflection points in the spherical aberration ...

Image forming optical system, imaging apparatus, profile measuring apparatus, structure manufacturing system and structure manufacturing method

There is provided a measuring apparatus including: an imaging optical system configured to form an image of an object to be measured; and an imaging section including a transmissive member which is arranged in the vicinity of an image plane of the imaging optical system to be inclined with respect an optical axis of the imaging optical system. The imaging optical system includes a first optical member which is non-coaxial with respect to the optical axis.

Imaging lens

An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens; a fourth lens having negative refractive power; a fifth lens having positive refractive power; and a sixth lens, arranged in this order from an object side to an image plane side. The first lens is formed so that a surface thereof on the object side has a positive curvature radius. The second lens is formed so that a surface thereof on the image plane side has a positive curvature radius. The fifth lens is formed so that a surface thereof on the object side and a surface thereof on the image plane side have negative curvature radii. Each of the third lens, the fourth lens, the fifth lens, and the sixth lens has refractive power weaker than that of each of the first lens and the second lens.

Lens Design Forms With No 3rd or 5th Order Aberrations

The invention is directed to correcting compound lens forms for 3rd and 5th order ray aberrations. All lens design forms have limiting aberrations. The proposed classes of lenses can be corrected for all 3rd and 5th order ray aberrations. The limiting aberrations are seventh order or higher. A variety of these lenses are disclosed here for the sake of example. These lens design forms can be used in various applications including the objective lens for an endoscope or other optical instrument. 1. An optical system which is correctable for all third order aberrations and all fifth order aberrations , having an object side and an image side , and comprising in order from the object side to the image side:a first lens, which is positive meniscus and concave to the object side;a second lens, which is negative meniscus and concave to the object side;a third lens, which is negative meniscus and convex to the object side;a fourth lens, which is biconvex; and,a fifth lens, which is negative meniscus and concave to the object side.2. The optical system of claim 1 , wherein the first lens and the second lens are arranged as a doublet.3. The optical system of claim 1 , further comprising an additional element for rendering the optical system achromatic.4. An optical system which is correctable for all third order aberrations and all fifth order aberrations claim 1 , having an object side and an image side claim 1 , and comprising in order from the object side to the image side:a first lens, which is positive meniscus and convex to the object side;a second lens, which is positive meniscus and concave to the object side;a third lens, which is negative meniscus and concave to the object side;a fourth lens, which is biconvex; and,a fifth lens, which is negative meniscus and concave to the object side.5. The optical system of claim 4 , wherein the second lens and the third lens are arranged as a doublet.6. The optical system of claim 4 , further comprising an additional element for ...

Projection optical system and projection display apparatus

A projection optical system substantially consists of a first optical system composed of a plurality of lens groups and a second optical system composed of one reflection mirror having a convex aspherical surface arranged in this order from the reduction side, in which all optical surfaces constituting the first and second optical systems are formed so as to have rotationally symmetrical shapes around one common axis, the projection optical system is configured such that focus adjustment is performed by individually moving two lens groups in the first optical system along the common axis, and the lens disposed on the most magnification side in the reduction side lens group of the two lens groups is a lens having a convex surface on the magnification side, thereby magnifying and projecting an image formed on a conjugate plane on the reduction side to a conjugate plane on the magnification side.

Vehicular camera and lens assembly

A vehicular camera includes a lens disposed at a lens holder and an imager disposed at a printed circuit board. The lens holder is one of (i) attached at the printed circuit board by a cured adhesive and (ii) attached at a holding element by a cured adhesive with the printed circuit board held by the holding element. The adhesive is initially curable in an initial radiation curing process and initially-cured adhesive is further curable to a further cured strength in a secondary thermal curing process. The adhesive is initially cured via the initial radiation curing process after the lens is brought into focus with the imager and is optically center-aligned therewith. When further cured via the secondary thermal curing process, the further-cured adhesive maintains focus and optical center-alignment of the lens with the imager for use of the camera in a vehicle.

Imaging optical system, and imaging apparatus incorporating the same

An imaging optical system including, from the object side to the image side, a first lens group having positive refracting power, an aperture stop, and a second lens group having positive power, in which the first lens group consists of three lens subgroups, having positive, negative and positive refracting powers, respectively, from the object side to the image side, with satisfaction of the following: 4<( LTL+fB )/ fB <15  (1) 0.3< D 12/ IH <4  (2) where fB is an on-axis distance, from an image side-surface in the second lens group to an image plane upon focusing at infinity, LTL is an on-axis distance from an object side-surface in the first lens group to the image side-surface in the second lens group, D12 is an on-axis length from an image side-surface in the first lens group to an object side-surface in the second lens group upon focusing at infinity, and IH is a maximum image height.

ERGONOMIC HEAD MOUNTED DISPLAY DEVICE AND OPTICAL SYSTEM

Optical systems such as image display systems include a freeform optical waveguide prism and a freeform compensation lens spaced therefrom by a gap of air or index cement. The compensation lens corrects for aberrations which the optical waveguide prism will introduce in light or images from an ambient real-world environment. The optical waveguide prism receives actively projected images at an entry location, and emits the projected images at an exit location after internally reflecting the images along an optical path therein. The image display system may include an image source and coupling optics. The approach permits design of an optical viewing device, for example in optical see-through HMDs, achieving an eyeglass-form appearance and a wide see-through field of view (FOV). 1. An image display system comprising:a freeform optical waveguide prism having a first major surface and a second major surface, the first major surface of the optical waveguide prism which in use is positioned to at least one of receive actively projected images into the optical waveguide prism from an active image source or emit the actively projected images out of the optical waveguide prism and the second major surface of the optical waveguide prism which in use is positioned to receive images of a real-world ambient environment into the optical waveguide prism, which real-world ambient environment is external to the image display system, at least some portions of the first and the second major surfaces of the optical waveguide prism being refractive surfaces that internally propagate light entering the optical waveguide prism along at least a portion of a length of the optical waveguide prism; anda freeform compensation lens having a first major surface and a second major surface, the first major surface of the compensation lens having a shape that at least approximately matches a shape of the second major surface of the optical waveguide prism, the freeform compensation lens positioned ...

Method for correcting the surface form of a mirror

A method for correcting a surface form of a mirror ( 1 ) for reflecting radiation in the wavelength range of 5-30 nm, which includes: applying a correction layer ( 13 ) having a layer thickness variation ( 21 ) for correcting the mirror's surface form, and applying a first group ( 19 ) of layers to the correction layer. The first group ( 19 ) of layers includes first ( 9 ) and second ( 11 ) layers arranged alternately one above another, wherein the first layers have a refractive index at the operating wavelength which is greater than the refractive index of the second layers for that radiation. The correction layer ( 13 ) is applied by: introducing the mirror into an atmosphere including a reaction gas ( 15 ), applying a correction radiation ( 17 ) having a location-dependent radiation energy density, such that a correction layer having a location-dependent layer thickness variation ( 21 ) grows on the mirror's irradiated surface.

Lens attachment of reduced focus and increased light admittance

A lens attachment, used with an objective lens, including from object side to image side, a first lens element with positive power, a second lens element with negative power, a third lens element with positive power, a fourth lens element with negative power, and a fifth lens element with positive power; the second and third lens elements form a doublet by adhesive; at least two of the third, fourth and fifth lens elements are anomalous dispersion lenses. 1. A lens attachment , adapted to be used with an objective lens; the lens attachment comprises , in a sequential order from an object side to an image side:a first lens assembly, comprising a first lens element which is a crescent-shape spherical lens having a positive power wherein a front surface of the first lens element is convex towards the object side and a rear surface of the first lens element is concave towards the object side;a second lens assembly, comprising a second lens element and a third lens element; the second lens element is a biconcave spherical lens having a negative power wherein a front surface of the second lens element is concave towards the image side and a rear surface of the second lens element is concave towards the object side, the third lens element is a biconvex spherical lens having a positive power wherein a front surface of the third lens element is convex towards the object side and a rear surface of the third lens element is convex towards the image side; the second lens element and the third lens element form a doublet by pairing with each other via adhesive;a third lens assembly, comprising a fourth lens element which is a biconcave spherical lens having a negative power wherein a front surface of the fourth lens element is concave towards the image side and a rear surface of the fourth lens element is concave towards the object side; anda fourth lens assembly, comprising a fifth lens element which is a biconvex lens having a positive power wherein a front surface of the ...

Imaging lens Assembly

The disclosure provides an imaging lens assembly, which sequentially includes, a movable diaphragm, a first lens, a second lens with a refractive power, a third lens with a refractive power, a fourth lens with a positive refractive power and a fifth lens with a refractive power, wherein an effective focal length f1 of the first lens and an effective focal length f4 of the fourth lens meet 1.0<f4/f1<2.3; and TSmin, a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax, a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis and CT1, a center thickness of the first lens on the optical axis meet 1.0<(|TSmin|+|TSmax|)/CT1<1.5.

Optical Image Capturing System

An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is disclosed. The first lens element has negative refractive power. The second through third lens elements have refractive power. The fourth lens element has positive refractive power. At least one of the image side surface and the object side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras. 1. An optical image capturing system , from an object side to an image side , comprising:a first lens element with refractive power;a second lens element with refractive power;a third lens element with refractive power;a fourth lens element with refractive power; andan image plane;wherein the optical image capturing system consists of the four lens elements with refractive power, at least one of the first through fourth lens elements has positive refractive power, an object-side surface and an image-side surface of the fourth lens element are aspheric, focal lengths of the first through fourth lens elements are f1, f2, f3 and f4 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an object-side surface of the first lens element to the image plane is HOS, a distance on an optical axis from the object-side surface of the first lens element to the image-side surface of the fourth lens element is InTL, a length of outline curve from an axial point on any surface of any one of the four lens elements to a coordinate point of vertical height with a distance of a half of the entrance pupil diameter from the optical axis on the surface along an outline of the surface is denoted as ARE, and the following relations are satisfied: 1.2≦f/HEP≦6.0, 0.5≦HOS/f≦20, ...

ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME

In a zoom lens including, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power, an appropriate setting is performed for each of the following: a movement locus for each lens unit; lateral magnifications β34w and β34t of a composite lens system of the third lens unit and the fourth lens unit at a wide angle end and at a telephoto end, respectively; lateral magnifications β2w and β2t of the second lens unit at the wide angle end and at the telephoto end, respectively; and lateral magnifications β3w and β3t of the third lens unit at the wide angle end and at the telephoto end, respectively. 1. A zoom lens comprising , in order from an object side to an image side:a first lens unit having a positive refractive power;a second lens unit having a negative refractive power;a third lens unit having a positive refractive power; anda fourth lens unit having a positive refractive power,wherein a distance between adjacent lens units varies when performing zooming,when zooming is performed, the first lens unit is configured not to be moved, and at least the second lens unit and the third lens unit are configured to be moved, and [{'br': None, 'i': t/β', 'w', 't/β', 'w, '2.20<(β3434)/(β22)<15.00,'}, {'br': None, 'i': t/β', 'w, '3.40<β33<18.00, and'}, {'br': None, 'i': 'w<−', '−0.15<β20.01.'}], 'when a lateral magnification of a composite lens system of the third lens unit and the fourth lens unit at a wide angle end is denoted by β34w, a lateral magnification of the composite lens system of the third lens unit and the fourth lens unit at a telephoto end is denoted by β34t, a lateral magnification of the second lens unit at the wide angle end is denoted by β2w, a lateral magnification of the second lens unit at the telephoto end is denoted by β2t, a lateral magnification ...

ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME

In a zoom lens including a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power that are arranged in order from an object side to an image side, a movement locus of each of the lens units when zooming, a configuration of the second lens unit, a focal length of the second lens unit, a focal length of the third lens unit, and a focal length of the zoom lens at the wide angle end are set as appropriate. 1. A zoom lens , comprising:a first lens unit having a positive refractive power;a second lens unit having a negative refractive power;a third lens unit having a positive refractive power; anda fourth lens unit having a positive refractive power, the first through fourth lens units being arranged in order from an object side to an image side,wherein a distance between adjacent lens units changes when zooming,wherein, when zooming, the first lens unit is stationary,wherein, when zooming from a wide angle end to a telephoto end, the second lens unit is configured to move toward the image side and then to move toward the object side, and the third lens unit is configured to move monotonously toward the object side,wherein the second lens unit includes two or more negative lenses, andwherein, when a focal length of the second lens unit is represented by f2, a focal length of the third lens unit is represented by f3, and a focal length of the zoom lens at the wide angle end is represented by fw, conditional expressions −1.05 Подробнее

IMAGE CAPTURING OPTICAL LENS ASSEMBLY

An image capturing optical lens assembly includes six lens elements, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface and a concave image-side surface. The third lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The sixth lens element has an aspheric object-side surface and an aspheric concave image-side surface, and the sixth lens element has at least one inflection point on the image-side surface thereof. 1. An image capturing optical lens assembly comprising , in order from an object side to an image side:a first lens element with positive refractive power having a convex object-side surface;a second lens element;a third lens element with negative refractive power having a convex object-side surface and a concave image-side surface;a fourth lens element;a fifth lens element having at least one of an object-side surface and an image-side surface being aspheric; anda sixth lens element having a convex object-side surface and a concave image-side surface, wherein the image-side surface of the sixth lens element is aspheric, and the sixth lens element has at least one inflection point on the image-side surface thereof; [{'br': None, 'i': C', '−C', 'C', '+C, '0<(34)/(34)<5.0; and'}, {'br': None, 'i': 'f<', '0.65 Подробнее

IMAGING LENS

An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens; and a sixth lens having negative refractive power, arranged from an object side to an image plane side. The first lens has an object-side surface and an image plane-side surface having positive curvature radii. The third lens has an object-side surface and an image plane-side surface having positive curvature radii. The fourth lens has an object-side surface and an image plane-side surface having negative curvature radii. The sixth lens is formed so that at least one of an object-side surface and an image plane-side surface is an aspherical surface and has at least one inflexion point. The first lens and the second lens have a specific composite focal length. 2. The imaging lens according to claim 1 , wherein said second lens has negative refractive power claim 1 , andsaid second lens is formed in a shape so that a surface thereof on the object side and a surface thereof on the image plane side have positive curvature radii.3. The imaging lens according to claim 1 , wherein said sixth lens is formed in the shape so that a surface thereof on the image plane side has a positive curvature radius.412. The imaging lens according to claim 1 , wherein said first lens has a focal length f claim 1 , and said second lens has a focal length f so that the following conditional expression is satisfied:{'br': None, 'i': f', '/f, '−0.7<12<−0.3.'}54. The imaging lens according to claim 1 , wherein said fourth lens has a focal length f so that the following conditional expression is satisfied:{'br': None, 'i': 'f/f', '−0.3<4<−0.01.'}634. The imaging lens according to claim 1 , wherein said third lens and said fourth lens have a composite focal length f so that the following conditional expression is satisfied:{'br': None, 'i': f', 'f<−, '−20.0<34/1.0.'}72316. The imaging lens according to claim 1 , wherein said second lens has a surface on the image plane ...

ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE SAME

A zoom lens includes, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; and a fifth lens unit having a negative refractive power, in which: at a telephoto end as compared to a wide angle end, an interval between first lens unit and second lens unit is increased, and an interval between second lens unit and third lens unit is decreased; an interval between each pair of adjacent lens units is changed during zooming; and focal lengths of a focusing mechanism and the third lens unit, a movement amount of the fifth lens unit during zooming from the wide angle end to the telephoto end, and other factors are appropriately set. 1. A zoom lens , comprising , in order from an object side to an image side:a first lens unit having a positive refractive power;a second lens unit having a negative refractive power;a third lens unit having a positive refractive power;a fourth lens unit having a positive refractive power; anda fifth lens unit having a negative refractive power,wherein at a telephoto end as compared to a wide angle end, an interval between the first lens unit and the second lens unit is increased, and an interval between the second lens unit and the third lens unit is decreased,wherein an interval between each pair of adjacent lens units is changed during zooming,wherein the fifth lens unit is configured to move in an optical axis direction during focusing, and [{'br': None, 'i': f', 'fw<, '0.4<3/1.0; and'}, {'br': None, 'i': m', 'fw, '−1.0<5/<−0.5,'}], 'wherein the following conditional expressions are satisfiedwhere fw represents a focal length of the zoom lens at the wide angle end, f3 represents a focal length of the third lens unit, and m5 represents a movement amount of the fifth lens unit during zooming from the wide angle end to the telephoto end.2 ...

Mobile device and optical imaging lens thereof

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop and six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Imaging lens

An imaging lens includes a first lens group having positive refractive power and a second lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens having negative refractive power. The second lens group includes a fourth lens having positive refractive power, a fifth lens, and a sixth lens having negative refractive power. The first lens and second lens have specific focal lengths. The first to third lenses have specific Abbe's numbers.

IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS

An imaging lens is constituted of five lenses, including, in order from the object side to the image side: a first lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a second lens having a negative refractive power and a concave surface toward the image side; a third lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side; a fourth lens having a negative refractive power; and a fifth lens having a negative refractive power and at least one inflection point on the surface thereof toward the image side. Predetermined conditional formulae are satisfied. 1. An imaging lens consisting of five lenses , including , in order from the object side to the image side:a first lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side;a second lens having a negative refractive power and a concave surface toward the image side;a third lens having a positive refractive power, which is of a meniscus shape having a convex surface toward the object side;a fourth lens having a negative refractive power; anda fifth lens having a negative refractive power and at least one inflection point on the surface thereof toward the image side; [{'br': None, 'i': f', 'f, '−3<1/23<−0.38\u2003\u2003(1)'}, {'br': None, 'i': 'f/f', '−1<2<−0.82\u2003\u2003(2-2)'}, {'br': None, 'i': R', 'f−R', 'r', 'R', 'f+R', 'r, '−0.18<(33)/(33)<0.5\u2003\u2003(3)'}], 'in which the conditional formulae below are satisfied.'}wherein f1 is the focal length of the first lens, f23 is the combined focal length of the second lens and the third lens, f is the focal length of the entire lens system, f2 is the focal length of the second lens, R3f is the paraxial radius of curvature of the surface of the third lens toward the object side, and R3r is the paraxial radius of curvature of the surface of the third lens toward the image side.2. An ...

Imaging lens and imaging apparatus equipped with the imaging lens

An imaging lens is constituted essentially by four or more lenses, including, in order from the object side to the image side: a first lens having a positive refractive power; a second lens having a negative refractive power; and a plurality of other lenses. The conditional formulae below are satisfied. 0.8<TL/ f <1.0  (1) 1.0< f /fl<3.0  (2) 2.03 mm< f <5.16 mm  (3) 1.0 mm<fl<3.0 mm  (4) wherein f is the focal length of the entire lens system, fl is the focal length of the first lens, TL is the distance along the optical axis from the surface of the first lens toward the object side to the paraxial focal point position at the image side in the case that the portion corresponding to back focus is an air converted length.

IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS

An imaging lens is constituted essentially by six lenses, including, in order from the object side to the image side: a first lens having a positive refractive power and a convex surface toward the object side; a second lens having a negative refractive power; a third lens having a positive refractive power and is of a biconvex shape; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power and a concave surface toward the object side; and a sixth lens having a negative refractive power, of which the surface toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Predetermined conditional formulae are satisfied. 1. An imaging lens consisting of six lenses , including , in order from the object side to the image side:a first lens having a positive refractive power and a convex surface toward the object side;a second lens having a negative refractive power;a third lens having a positive refractive power and is of a biconvex shape;a fourth lens having a positive refractive power;a fifth lens having a negative refractive power and a concave surface toward the object side; anda sixth lens having a negative refractive power, of which the surface toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof; [{'br': None, 'i': 'f/f', '0.55<3<1 \u2003\u2003(1)'}, {'br': None, 'i': 'f/f', '0.7<1<0.95 \u2003\u2003(3-1)'}], 'the conditional formulae below being satisfied{'b': 1', '3, 'wherein f is the focal length of the entire lens system, f is the focal length of the first lens, and f is the focal length of the third lens.'}2. An imaging lens as defined in claim 1 , in which the conditional formula below is further satisfied:{'br': None, 'i': 'f/f', '1.28<34<1.62 \u2003\u2003(7)'}{'b': '34', 'wherein f is the combined focal length of the third lens and the fourth ...

Zoom Lens

A zoom lens of high zoom ratio that has high quality in imaging performance and achieved downsizing and cost reduction at the same time. The zoom lens includes a positive first lens group to a positive fourth lens group achieves a predetermined zoom ratio by moving all lens groups along the optical axis direction backward and forward in magnification change, wherein the first lens group includes the negative lens, the positive lens and the positive lens; the second lens group includes at least two negative lenses and one positive lens; the third lens group includes two positive biconvex lenses and the negative lens in order from the object side and. The following conditional expression (1) and conditional expression (2) are satisfied: 2. The zoom lens according to claim 1 , wherein a curvature radius of a surface at the object side of a positive biconvex lens second from the object side in the two positive biconvex lenses adjacently disposed in the third lens group is smaller than a curvature radius of the surface at an imaging side.5. The zoom lens according to claim 1 , wherein the lens groups move to make the gap between the first lens group and the second lens group wide claim 1 , the gap between the second lens group and the third lens group narrow and the gap between the third lens group and the fourth lens group narrow in magnification change from a wide angle end to a telephoto end.6. The zoom lens according to claim 1 , wherein the lens groups constituting the optical system further include the fifth lens group following the fourth lens group in addition to the first lens group to the fourth lens group claim 1 , whereinthe lens groups move to make the gap between the first lens group and the second lens group wide, the gap between the second lens group and the third lens group narrow, the gap between the third lens group and the fourth lens group narrow and the gap between the fourth lens group and the fifth lens group wide in magnification change from a ...

Zoom Lens and Image Pickup Apparatus Using the Same

A zoom lens comprises four lens unit, and at the time of zooming, each of a distance between a first positive lens unit and a first negative lens unit and a distance between a second negative lens unit and a second positive lens unit changes, and a distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, and the first positive lens unit includes an object-side sub-lens unit and an image-side sub-lens unit, and an aperture stop is disposed between the object-side sub-lens unit and the image-side sub-lens unit, and the first negative lens unit includes a negative lens and a positive lens, and a refracting surface nearest to an image in the first negative lens unit is concave toward the image side, and a refracting surface nearest to an object in the second positive lens unit is concave toward the object side, and a refracting surface nearest to the image in the second positive lens unit is convex toward the image side, and the zoom lens satisfies predetermined conditional expressions. 1. A zoom lens comprising:a first positive lens unit having a positive refractive power;a first negative lens unit having a negative refractive power, which is disposed immediately before an object side of the first positive lens unit;a second negative lens unit having a negative refractive power, which is disposed immediately after an image side of the first positive lens unit; anda second positive lens unit which is disposed nearest to an image, whereinat the time of zooming from a wide angle end to a telephoto end, each of a distance between the first positive lens unit and the first negative lens unit and a distance between the second negative lens unit and the second positive lens unit changes, anda distance between the first positive lens unit and the second negative lens unit widens more at the telephoto end than at the wide angle end, andthe first positive lens unit includes in order from the ...

MEASUREMENT APPARATUS FOR MEASURING A WAVEFRONT ABERRATION OF AN IMAGING OPTICAL SYSTEM

A measurement apparatus () for measuring a wavefront aberration of an imaging optical system () includes (i) a measurement wave generating module () which generates a measurement wave () radiated onto the optical system and which includes an illumination system () illuminating a mask plane () with an illumination radiation (), as well as coherence structures () arranged in the mask plane, and (ii) a wavefront measurement module () which measures the measurement wave after passing through the optical system and determines from the measurement result, with an evaluation device (), a deviation of the wavefront of the measurement wave from a desired wavefront. The evaluation device () determines an influence of an intensity distribution () of the illumination radiation in the region of the mask plane on the measurement result and, when determining the deviation of the wavefront, utilizes the influence of the intensity distribution. 1. A measurement apparatus for measuring a wavefront aberration of an imaging optical system comprising: an illumination system configured to illuminate a mask plane with an illumination radiation, and', 'coherence structures arranged in the mask plane, and, 'a measurement wave generating module configured to generate a measurement wave radiated onto the optical system, wherein the measurement wave generating module comprisesa wavefront measurement module configured to determine a measurement result after the measurement wave passes through the optical system and, with an evaluation device, to determine from the measurement result a deviation of the wavefront of the measurement wave from a desired wavefront,wherein the evaluation device is configured to determine an influence of an intensity distribution of the illumination radiation in a region of the mask plane on the measurement result with an optical propagation calculation and to determine the deviation of the wavefront of the measurement wave in accordance with the determined influence ...

LENS MODULE AND ELECTRONIC DEVICE

A plastic lens element includes an effective optical portion and a peripheral portion in order from an optical axis to an edge thereof. The peripheral portion includes a plurality of rib structures, wherein each of the rib structures has a strip shape in a radial direction of the optical axis, and the rib structures are arranged around the effective optical portion and indirectly connected to the effective optical portion. 1. A lens module , comprising an optical lens assembly , wherein the optical lens assembly comprises at least five lens elements , at least one of the lens elements is a plastic lens element , and in order from an optical axis of the plastic lens element to an edge thereof , the plastic lens element comprises:an effective optical portion; and 'a plurality of rib structures, wherein each of the rib structures has a strip shape in a radial direction of the optical axis, and the rib structures are arranged around the effective optical portion and indirectly connected to the effective optical portion.', 'a peripheral portion, comprising2. The lens module of claim 1 , wherein the rib structures and the plastic lens element are formed integrally.3. The lens module of claim 1 , wherein a width of each of the rib structures in a circumferential direction of the plastic lens element is (w) claim 1 , and the following condition is satisfied:{'br': None, 'i': 'w<', '0.01mm<0.05mm.'}4. The lens module of claim 2 , wherein at least one of two surfaces of the effective optical portion has a wavy shape.5. The lens module of claim 1 , wherein each of the rib structures has an inclined surface having an angle with the optical axis of the plastic lens element.6. The lens module of claim 1 , wherein the optical lens assembly further comprises:at least one optical element abutted with the plastic lens element, wherein the rib structures of the plastic lens element do not have contact with the optical element.7. The lens module of claim 1 , wherein the peripheral ...

LENS MODULE AND ELECTRONIC DEVICE

A plastic lens element includes an effective optical portion and a peripheral portion in order from an optical axis to an edge thereof. The peripheral portion includes a plurality of rib structures, wherein each of the rib structures has a strip shape in a radial direction of the optical axis, and the rib structures are arranged around the effective optical portion and indirectly connected to the effective optical portion. 1. A lens module , comprising an optical lens assembly , wherein the optical lens assembly comprises at least two optical elements , one of the optical elements is a plastic lens element , and in order from an optical axis of the plastic lens element to an edge thereof , the plastic lens element comprises:an effective optical portion; and a plurality of rib structures, wherein each of the rib structures has a strip shape in a radial direction of the optical axis, and the rib structures are arranged around the effective optical portion and indirectly connected to the effective optical portion; and', 'an object-side abutting surface disposed on a surface of the peripheral portion facing an object, wherein at least another one of the optical elements is abutted with the object-side abutting surface, the rib structures are disposed on the surface of the peripheral portion facing the object, and the rib structures are farther from the effective optical portion than the object-side abutting surface is from the effective optical portion., 'a peripheral portion, comprising2. The lens module of claim 1 , wherein the rib structures and the plastic lens element are formed integrally.3. The lens module of claim 1 , wherein a width of each of the rib structures in a circumferential direction of the plastic lens element is (w) claim 1 , and the following condition is satisfied:{'br': None, '0.01 mm Подробнее

SYSTEMS FOR PASSIVE OPTICAL CORRECTION OF POLARIZATION LEAKAGES

Passive optical systems and methods for improving polarization of an optical reference beam are disclosed. For example, an optical system includes first and second quarter wavelength plates (QWPs) positioned in a beam path of the optical system. The second QWP is positioned in the beam path such that a fast axis of the second QWP is substantially orthogonal to a fast axis of the first QWP. First and second polarization elements are also positioned in the beam path. The first and second polarization elements are each configured to provide both diattenuation and retardance of the optical reference beam. 1. An optical system for improving polarization of an optical reference beam , the optical system comprising:a first quarter wavelength plate (QWP) positioned in a beam path of the optical system;a first polarization element positioned in the beam path, the first polarization element being configured to provide diattenuation and retardance of the optical reference beam;a second QWP positioned in the beam path such that a fast axis of the second QWP is substantially orthogonal to a fast axis of the first QWP; anda second polarization element positioned in the beam path, the second polarization element being configured to provide diattenuation and retardance of the optical reference beam.2. The optical system of claim 1 , wherein the system is configured to substantially reduce a periodic error of the optical reference beam.3. The optical system of claim 2 , wherein the first QWP is configured such that a slow axis of the first QWP is parallel to a polarization vector of a first optical wave of the optical reference beam.4. The optical system of claim 3 , wherein the second QWP is configured such that a slow axis of the second QWP is perpendicular to the slow axis of the first QWP.5. The optical system of claim 4 , wherein the first polarization element comprises a first waveplate having a surface with an anti-reflective (AR) coating and a surface without an AR coating.6 ...

OPTICAL LENS ASSEMBLY, IMAGE CAPTURING APPARATUS AND ELECTRONIC DEVICE

This invention provides an optical lens assembly comprising, in order from an object side to an image side: a first lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof; a second lens element having positive refractive power; a third lens element having an object-side surface being concave in a paraxial region thereof; and a fourth lens element having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface thereof having at least one convex shape in an off-axis region thereof; wherein the optical lens assembly has a total of four lens elements. With such configuration, the optical lens assembly of the present disclosure is characterized by a reduced size and a wide field of view. 1. An optical lens assembly , comprising , in order from an object side to an image side:a first lens element having an object-side surface being concave in a paraxial region thereof;a second lens element;a third lens element with positive refractive power; anda fourth lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface thereof having at least one convex shape in an off-axis region thereof; [{'br': None, 'i': T', 'T, '23/12<1.50; and'}, {'br': None, 'i': R', 'f<, '0<8/1.20.'}], 'wherein an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, a focal length of the optical lens assembly is f, a curvature radius of the image-side surface of the fourth lens element is R8, and the following conditions are satisfied2. The optical lens assembly of claim 1 , wherein the third lens element has an object-side surface being concave in a paraxial region thereof and an image- ...

PHOTOGRAPHING OPTICAL LENS ASSEMBLY, IMAGE CAPTURING UNIT AND ELECTRONIC DEVICE

A photographing optical lens assembly includes, in order from object side to image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element has positive refractive power. The second, third, fourth and fifth lens elements have refractive power. The sixth lens element with refractive power has an image-side surface being concave in a paraxial region, wherein an object-side surface and the image-side surface of the sixth lens element are both aspheric, and the image-side surface has at least one inflection point. The seventh lens element with refractive power has an image-side surface being concave in a paraxial region, wherein an object-side surface and the image-side surface of the seventh lens element are both aspheric, and the image-side surface has at least one inflection point. 1. A photographing optical lens assembly comprising seven lens elements , the seven lens elements being , in order from an object side to an image side , a first lens element , a second lens element , a third lens element , a fourth lens element , a fifth lens element , a sixth lens element and a seventh lens element;wherein the first lens element has positive refractive power, the second lens element has an object-side surface being convex in a paraxial region thereof, the third lens element has an image-side surface being concave in a paraxial region thereof, an image-side surface of the sixth lens element has at least one inflection point, and an image-side surface of the seventh lens element has at least one inflection point;wherein there is a non-axial critical point on the image-side surface of the sixth lens element at which a tangent to the image-side surface of the sixth lens element is perpendicular to an optical axis, there is a non-axial critical point on the image-side surface of the seventh lens element at which a tangent to the image-side ...

OPTICAL IMAGING ASSEMBLY AND SYSTEM WITH OPTICAL DISTORTION CORRECTION

An optical imaging assembly is provided, having an optical axis; an object axis defined by an object being imaged; an aperture stop disposed on the optical axis; a light-transmissive sleeve enclosing the object axis, being disposed in object space defined by the object axis; and at least three refractive lens elements being arranged between the object and the aperture stop without any other intervening optical component, at least one of the elements having surfaces having at least one of cylindrical and acylindrical prescription, with an image plane, wherein the object being imaged lies within the sleeve. 1. An optical imaging assembly , comprising:a light-transmissive sleeve arranged on an optical axis and configured to enclose an object;a first refractive element arranged on the optical axis and having a first input surface and a first output surface, wherein one of the first input surface and the first output surface comprises a planar surface and the other of the first input surface and the first output surface comprises a cylindrical or acylindrical surface; and,a second refractive element arranged on the optical axis and having a second input surface and a second output surface, wherein one of the second input surface and the second output surface comprises a planar surface and the other of the second input surface and the second output surface comprises a cylindrical or acylindrical surface;wherein both said first and second refractive elements are arranged on the optical axis without any other intervening optical component such that said first and second output surfaces are configured to act in conjunction remove optical distortion generated by the object.2. The optical imaging assembly as set forth in further comprising:a third refractive element arranged on the optical axis and having a third input surface and a third output surface; and,a fourth refractive element arranged on the optical axis and having a fourth input surface and a fourth output surface, ...

OPTICAL IMAGING SYSTEM

An optical imaging system includes first through seventh lenses. The first lens includes positive refractive power, the second lens includes a positive refractive power, the third lens includes a negative refractive power, an object-side surface thereof being convex, the fourth lens includes a positive refractive power, the fifth lens includes a negative refractive power, the sixth lens includes a negative refractive power, and the seventh lens includes a negative refractive power and having an inflection point formed on an image-side surface thereof. The first to seventh lenses are sequentially disposed from an object side toward an imaging plane. 1. An optical imaging system , comprising:a first lens comprising a positive refractive power;a second lens comprising a positive refractive power;a third lens comprising a negative refractive power, an object-side surface of the third lens being convex;a fourth lens comprising a positive refractive power;a fifth lens comprising a negative refractive power;a sixth lens comprising a negative refractive power; anda seventh lens comprising a negative refractive power and comprising an inflection point formed on an image-side surface thereof,wherein the first to seventh lenses are sequentially disposed from an object side toward an imaging plane.2. The optical imaging system of claim 1 , wherein an object-side surface of the first lens is convex claim 1 , and an image-side surface of the first lens is concave.3. The optical imaging system of claim 1 , wherein an object-side surface and an image-side surface of the second lens are convex.4. The optical imaging system of claim 1 , wherein an image-side surface of the third lens is concave.5. The optical imaging system of claim 1 , wherein an object-side surface and an image-side surface of the fourth lens are convex.6. The optical imaging system of claim 1 , wherein an object-side surface of the fifth lens is concave claim 1 , and an image-side surface of the fifth lens is ...

LIGHT HOMOGENIZING ELEMENTS WITH CORRECTIVE FEATURES

Light homogenizing elements are described. The light homogenizing elements include lens arrays with corrective features designed to improve the uniformity of light fields produced by optical sources. The corrective features include masks placed at selected positions of selected lenslets in a lens array. The corrective features block or reduce the transmission of light through the lens array at the selected position to correct for spatial or angular non-uniformities in a light field produced by an optical source. Illumination systems that include a corrected lens array coupled to a light source produce highly uniform light fields. Applications include microlithography. 1. A light homogenizing element comprising:a lens array configured to transmit light at an operating wavelength, the lens array comprising a plurality of lenslets, the plurality of lenslets including a first lenslet, the first lenslet having a first aperture, the first aperture having a surface with a corrected portion defined by a first corrective feature, the first corrective feature reducing a transmittance of the operating wavelength through the first lenslet.2. The light homogenizing element of claim 1 , wherein each of the plurality of lenslets has a square cross-section.3. The light homogenizing element of claim 1 , wherein the surface of the first aperture is powered.4. The light homogenizing element of claim 1 , wherein the first corrective feature partially covers the surface of the first aperture.5. The light homogenizing element of claim 1 , wherein the first corrective feature is spaced apart from the surface of the first aperture.6. The light homogenizing element of claim 1 , wherein the first corrective feature is a mask.7. The light homogenizing element of claim 6 , wherein the mask is perforated.8. The light homogenizing element of claim 1 , wherein the first corrective feature is translucent.9. The light homogenizing element of claim 1 , wherein the plurality of lenslets further ...

OPTICAL IMAGING LENS ASSEMBLY AND ELECTRONIC DEVICE

The present disclosure provides an optical imaging lens assembly and an electronic device. The optical imaging lens assembly includes, sequentially from an object side to an image side along an optical axis, a window member; a first lens having a positive refractive power, and an object-side surface of the first lens being a convex surface; a second lens having a negative refractive power; and at least one subsequent lens having a refractive power, wherein an entrance pupil diameter EPD of the optical imaging lens assembly and half of an effective aperture DTg of the window member at an object-side surface thereof satisfy: EPD/DTg>1.6, which makes the optical imaging lens assembly have the characteristics of high resolution and miniaturization. When the optical imaging lens assembly is installed on an electronic device, it can minimize the impact on the full-screen display. 1. An optical imaging lens assembly , sequentially from an object side to an image side of the optical imaging lens assembly along an optical axis , comprising:a window member;a first lens having a positive refractive power, and an object-side surface of the first lens being a convex surface;a second lens having a negative refractive power; andat least one subsequent lens having a refractive power,wherein EPD/DTg>1.6, where EPD is an entrance pupil diameter of the optical imaging lens assembly and DTg is half of an effective aperture of the window member at an object-side surface of the window member.2. The optical imaging lens assembly according to claim 1 , wherein 0.7 Подробнее

IMAGING LENS

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis. The fifth lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis. The seventh lens is formed in a shape so that a surface thereof on the image plane side has at least one inflexion point and is concave near an optical axis. 1. An imaging lens comprising:a first lens;a second lens having at least one surface formed in an aspheric shape;a third lens having at least one surface formed in an aspheric shape;a fourth lens having at least one surface formed in an aspheric shape;a fifth lens having two surfaces each formed in an aspheric shape;a sixth lens having two surfaces each formed in an aspheric shape; anda seventh lens having two surfaces each formed in an aspheric shape, arranged in this order from an object side to an image plane side,wherein said imaging lens has a total of seven lenses,said first lens, said second lens, said third lens, said fourth lens, said fifth lens, said sixth lens, and said seventh lens are arranged respectively with a space in between,said first lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis thereof,said fifth lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis thereof, andsaid seventh lens is formed in a shape so that a surface thereof on the image plane side has at least one inflexion point and is concave near an optical axis thereof.2. The imaging lens according to claim 1 , wherein said first lens has an Abbe's number υd1 claim 1 , said second ...

IMAGING LENS

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The second lens is formed in a shape so that a surface on the image plane side is concave near an optical axis. The fifth lens is formed in a shape so that a surface on the image plane side is concave near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has one inflexion point. 1. An imaging lens comprising:a first lens having positive refractive power;a second lens having at least one surface formed in an aspheric shape;a third lens having at least one surface formed in an aspheric shape;a fourth lens having at least one surface formed in an aspheric shape;a fifth lens having two surfaces each formed in an aspheric shape;a sixth lens having two surfaces each formed in an aspheric shape; anda seventh lens having negative refractive power and two surfaces each formed in an aspheric shape, arranged in this order from an object side to an image plane side,wherein said imaging lens has a total of seven lenses,said first lens, said second lens, said third lens, said fourth lens, said fifth lens, said sixth lens, and said seventh lens are arranged respectively with a space in between,said first lens is formed in a meniscus shape so that a surface thereof on the object side is convex near an optical axis thereof,said second lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis thereof,said fifth lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis thereof, andsaid seventh lens is formed in a shape ...

PHOTOGRAPHING OPTICAL LENS ASSEMBLY, IMAGE CAPTURING DEVICE AND ELECTRONIC DEVICE

A photographing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The third lens element has refractive power. The fourth lens element has refractive power, and an object-side surface and an image-side surface thereof are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein an object-side surface and the image-side surface thereof are aspheric, and at least one of the object-side surface and the image-side surface thereof has at least one inflection point. 1. A photographing optical lens assembly comprising five lens elements , the five lens elements being , in order from an object side to an image side:a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element;wherein each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side;wherein the first lens element has positive refractive power; at least one of the object-side surface and the image-side surface of the second lens element is aspheric; the image-side surface of the fifth lens element is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface of the fifth lens element has at least one inflection point; [{'br': None, 'i': f', 'T, '0<1/34<2.85;'}, {'br': None, 'i': '|2|.'}], 'wherein there is an air gap in a paraxial region between every adjacent lens element of the five lens elements, a focal length of the photographing optical lens assembly is f, a focal length of ...

IMAGING LENS

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The second lens is formed in a meniscus shape near an optical axis. The third lens is formed in a meniscus shape so that a surface on the object side is convex near an optical axis. The sixth lens is formed in a meniscus shape near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has at least one inflexion point. The first lens and the second lens have specific Abbe's numbers. 1. An imaging lens comprising:a first lens having positive refractive power;a second lens having at least one surface formed in an aspheric shape;a third lens having at least one surface formed in an aspheric shape;a fourth lens having at least one surface formed in an aspheric shape;a fifth lens having two surfaces each formed in an aspheric shape;a sixth lens having positive refractive power and two surfaces each formed in an aspheric shape; anda seventh lens having two surfaces each formed in an aspheric shape, arranged in this order from an object side to an image plane side,wherein said imaging lens has a total of seven lenses,said first lens, said second lens, said third lens, said fourth lens, said fifth lens, said sixth lens, and said seventh lens are arranged respectively with a space in between,said second lens is formed in a meniscus shape near an optical axis thereof,said third lens is formed in a meniscus shape so that a surface thereof on the object side is convex near an optical axis thereof,said sixth lens is formed in a meniscus shape near an optical axis thereof,said seventh lens is formed in a shape so that a surface thereof on the image plane side has at least one inflexion point, and [{'br': None, 'i': 'd', ' ...

IMAGING LENS

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The third lens is formed in a shape so that a surface on the object side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has at least one inflexion point and is concave near an optical axis. The fourth lens and the fifth lens have specific Abbe's numbers. 1. An imaging lens comprising:a first lens;a second lens having at least one surface formed in an aspheric shape;a third lens having at least one surface formed in an aspheric shape;a fourth lens having at least one surface formed in an aspheric shape;a fifth lens having two surfaces each formed in an aspheric shape;a sixth lens having two surfaces each formed in an aspheric shape; anda seventh lens having two surfaces each formed in an aspheric shape, arranged in this order from an object side to an image plane side,wherein said imaging lens has a total of seven lenses,said first lens, said second lens, said third lens, said fourth lens, said fifth lens, said sixth lens, and said seventh lens are arranged respectively with a space in between,said first lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis thereof,said third lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis thereof,said seventh lens is formed in a shape so that a surface thereof on the image plane side has at least one inflexion point and is concave near an optical axis thereof, and [{'br': None, 'i': 'd', '20<ν4<35,'}, {'br': None, 'i': 'd', '20<ν5<35.'}], "said ...

Imaging lens

An imaging lens includes a first lens; a second lens; a third lens; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged from an object side to an image plane side. The imaging lens has a total of seven lenses. The first to seventh lenses are arranged respectively with a space in between. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The third lens has a meniscus shape near an optical axis. The fourth lens is formed in a shape so that a surface on the image plane side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side has one inflexion point and is concave near an optical axis. The fourth lens has a specific Abbe's number.

OPTICAL IMAGING LENS GROUP

The present application discloses an optical imaging lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens having refractive powers in order from an object side to an image side along an optical axis. The first lens has a negative refractive power. The fourth lens has a positive refractive power. The eighth lens has a negative refractive power. At least one of the first lens to the eighth lens has a non-rotationally symmetrical aspherical lens surface, and the maximum TV distortion TDT in an imaging range of the optical imaging lens group satisfies: |TDT|≤3.5%. 1. An optical imaging lens group , comprising a first lens , a second lens , a third lens , a fourth lens , a fifth lens , a sixth lens , a seventh lens and an eighth lens having refractive powers in order from an object side to an image side along an optical axis , whereinthe first lens has a negative refractive power;the fourth lens has a positive refractive power;the eighth lens has a negative refractive power;at least one of the first lens to the eighth lens has a non-rotationally symmetrical aspherical lens surface; andthe maximum TV distortion TDT in an imaging range of the optical imaging lens group satisfies: |TD|≤3.5%.2. The optical imaging lens group according to claim 1 , wherein an image height IHx in an X-axis direction of the optical imaging lens group and an image height IHy in a Y-axis direction of the optical imaging lens group satisfy: √{square root over (IH+IH)}≤4.0 mm.3. The optical imaging lens group according to claim 1 , wherein a semi-field of view Semi-FOVx in an X-axis direction of the optical imaging lens group and a semi-field of view Semi-FOVy in a Y-axis direction of the optical imaging lens group satisfy: tan(Semi-FOVy)/tan(Semi-FOVx)<2.0.4. The optical imaging lens group according to claim 2 , wherein values of effective radii of respective lens surfaces of an object side surface of the ...

IMAGING UNIT, LENS BARREL, AND PORTABLE TERMINAL

To obtain an imaging unit, a lens barrel, and a portable terminal which can effectively suppress spring-back of solid-state imaging elements, while facilitating height lowering thereof. An imaging unit includes: a solid-state imaging element; and an imaging lens for forming a subject image on a photoelectric conversion part of the solid-state imaging element. An imaging surface of the solid-state imaging element is curved in a manner that a peripheral side is inclined toward an object side relative to a screen center. The imaging lens constrains the solid-state imaging element to prevent a radius of curvature of the imaging surface from varying. Thus, field curvature, distortion aberration, and comatic aberration are appropriately corrected. 1. An imaging unit comprising: an imaging lens for forming a subject image on a photoelectric conversion part of the solid-state imaging element, wherein', 'an imaging surface of the solid-state imaging element is curved in a manner that a peripheral side is inclined toward an object side relative to a screen center, and', 'the imaging lens constrains the solid-state imaging element to prevent a radius of curvature of the imaging surface from varying., 'a solid-state imaging element; and'}2. The imaging unit according to claim 1 , wherein an optical surface or a flange part of the imaging lens abuts on a peripheral part of the imaging surface of the solid-state imaging element.3. The imaging unit according to claim 1 , wherein a space between the imaging lens and the solid-state imaging element is sealed.4. The imaging unit according to claim 1 , wherein claim 1 , when seen from an optical axis direction claim 1 , a portion of the imaging lens extends from the solid-state imaging element in a direction orthogonal to an optical axis claim 1 , a portion of the solid-state imaging element extends from the imaging lens in a direction orthogonal to the optical axis claim 1 , and wire connection for transmitting signals to an external ...

SYSTEMS AND METHODS FOR GENERATING DEPTH MAPS USING A CAMERA ARRAYS INCORPORATING MONOCHROME AND COLOR CAMERAS

A camera array, an imaging device and/or a method for capturing image that employ a plurality of imagers fabricated on a substrate is provided. Each imager includes a plurality of pixels. The plurality of imagers include a first imager having a first imaging characteristics and a second imager having a second imaging characteristics. The images generated by the plurality of imagers are processed to obtain an enhanced image compared to images captured by the imagers. Each imager may be associated with an optical element fabricated using a wafer level optics (WLO) technology. 1. A camera array , comprising:a plurality of cameras configured to capture images of a scene;an image processor configured to process at least a subset of images captured by the plurality of cameras;wherein the plurality of cameras comprises at least two cameras having different imaging characteristics including at least one monochrome camera and at least one color camera; measure parallax within the processed images by detecting parallax-induced changes that are consistent across the images taking into account the position of the cameras that captured the images;', 'generate a depth map using the measured parallax; and', 'synthesize an image using the images captured by the at least one monochrome camera and the at least one color camera using the depth map., 'wherein the image processor is configured to2. The camera array of claim 1 , wherein the plurality of cameras comprises at least two cameras having different imaging characteristics including different fields of view.3. The camera array of claim 2 , wherein the image processor is configured to synthesize images having different levels of zoom.4. The camera array of claim 3 , further comprising:a display;wherein the image processor is configured to synthesize images that smoothly transition from one zoom level to another zoom level when displayed.5. The camera array of claim 4 , wherein the transition is from a zoom level corresponding to ...

STORAGE AND SIGNALING OF ENTRANCE PUPIL PARAMETERS FOR IMMERSIVE MEDIA

A method, apparatus, and computer program product provide for receiving, storing, and providing parameters associated with an entrance pupil of an omnidirectional lens. In the context of a method, the method receives parameter information associated with an entrance pupil of an omnidirectional lens. The method stores one or more elements of the parameter information in one or more data structures. The method provides the one or more data structures for use in one or more image formation tasks. 1. A method comprising:receiving parameter information associated with an entrance pupil of an omnidirectional lens, wherein the parameter information comprises one or more entrance pupil coefficients and a value representing a total number of entrance pupil coefficients;storing one or more elements of the parameter information in one or more data structures; andproviding the one or more data structures for use in one or more image formation tasks.2. The method according to claim 1 , wherein the parameter information further comprises entrance pupil distortion correction parameters claim 1 , and wherein the entrance pupil distortion correction parameters are used to correct a camera_centre_offset (O) to its real optical center (C) in external camera coordinates.3. The method according to claim 2 , wherein full correction under varying entrance pupil equates to θ=Σp*r+EP(θ) claim 2 , wherein θ represents an angle of a sphere coordinate from a normal vector of a nominal imaging plane that passes through a center of a sphere coordinate system for an active area of a circular image claim 2 , N represents a total number of entrance pupil coefficients claim 2 , prepresents a polynomial coefficient claim 2 , r represents a normalized distance of a luma sample from a center of the circular image claim 2 , and EP(θ) represents an entrance pupil equation Σq*r claim 2 , wherein Mrepresents three more than the total number of entrance pupil coefficients and qrepresents one or more ...

Systems and methods for generating depth maps using a camera arrays incorporating monochrome and color cameras

A camera array, an imaging device and/or a method for capturing image that employ a plurality of imagers fabricated on a substrate is provided. Each imager includes a plurality of pixels. The plurality of imagers include a first imager having a first imaging characteristics and a second imager having a second imaging characteristics. The images generated by the plurality of imagers are processed to obtain an enhanced image compared to images captured by the imagers. Each imager may be associated with an optical element fabricated using a wafer level optics (WLO) technology.

IMAGING DEVICE, OPERATION METHOD, IMAGE PROCESSING DEVICE, AND IMAGE PROCESSING METHOD

The imaging device includes an imaging optical system, imaging unit having an imaging element and for capturing a video by imaging a subject image through the imaging optical system, a camera shake detection unit configured to detect camera shake, an optical correction unit configured to optically correct the camera shake detected by the camera shake detection unit by changing a position of the imaging optical system or the imaging element in a case where the optical correction unit is turned on and to stop the correction in a case where the optical correction unit is turned off, and a reset determination unit for determining whether or not to reset the position of the imaging optical system or the imaging element. The optical correction unit resets the position of the imaging optical system or the imaging element in a case where the reset determination unit determines to reset the position of the imaging optical system or the imaging element. The imaging device further includes an electronic correction unit configured to electronically correct a change of a position of a subject, based on an operation of the reset by the optical correction unit, in an image captured by the imaging unit in a case where the reset by the optical correction unit is started. 1. An imaging device comprising:an imaging optical system that includes one or more lens;an imaging unit having an imaging element, for capturing a video by imaging a subject image through the imaging optical system;a camera shake detection unit configured to detect camera shake;an optical correction unit configured to optically correct the camera shake detected by the camera shake detection unit in a case where the optical correction unit is turned on by changing a position of the imaging optical system or the imaging element, and to stop the correction in a case where the optical correction unit is turned off; anda reset determination unit configured to determine whether or not to reset the position of the imaging ...

Imaging lens

An imaging lens includes plastic-made first, second, third, and fourth lens elements arranged in the given order from an object side to an imaging side. The first lens element has a positive focusing power and is biconvex. The second lens element has a negative focusing power, is biconcave, and has an abbe number not greater than 30. The third lens element has a positive focusing power and has a convex imaging-side surface facing toward the imaging side. The fourth lens element has an imaging-side surface formed with a concave area in a vicinity of an optical axis of the fourth lens element. The imaging lens further includes an aperture stop disposed between the first and second lens elements.

Intraoral scanner that compensates for optical inaccuracies

A system comprises alight source to provide light, an optical system comprises focusing optics to focus the light onto a focal surface, a detector to measure returning light that is reflected off of a three dimensional object, a translation mechanism to displace the focal surface along an imaging axis defined by the optical path, and one or more processor. The one or more processor is to generate measurement data comprising coordinates of a plurality of surface points of the three dimensional object based on the measured returning light; adjust the coordinates of the subset of the plurality of surface points along up to three axes to correct the measurement data so as to remove inaccuracies caused by changes in magnification at the focal surface; and generate a three dimensional model of the three dimensional object using corrected measurement data.

Optical Imaging Lens Assembly

The disclosure provides an optical imaging lens assembly, which sequentially includes from an object side to an image side along an optical axis: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a refractive power; a fourth lens having a refractive power and an image-side surface of the fourth lens being a concave surface; and a fifth lens having a refractive power. ImgH, half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, TTL, a distance from an object-side surface of the first lens to the imaging surface on the optical axis, and f, a total effective focal length of the optical imaging lens assembly satisfy: ImgH/(TTL/f)>45 mm, which makes the optical imaging lens assembly have the features of long focus, a large image surface, etc. 1. An optical imaging lens assembly , sequentially comprising from an object side to an image side along an optical axis:a first lens having a positive refractive power;a second lens having a negative refractive power;a third lens having a refractive power;a fourth lens having a refractive power, and an image-side surface of the fourth lens being a concave surface; anda fifth lens having a refractive power; and {'br': None, 'i': 'f', 'ImgH/(TT/)>4.5 mm.'}, 'wherein ImgH, half of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens assembly, TTL, a distance from an object-side surface of the first lens to an imaging surface along the optical axis, and f, a total effective focal length of the optical imaging lens assembly satisfy2. The optical imaging lens assembly according to claim 1 , wherein TTL claim 1 , the distance from the object-side surface of the first lens to the imaging surface along the optical axis and f claim 1 , the total effective focal length of the optical imaging lens assembly satisfy:{'br': None, 'i': 'f<', '0.8 Подробнее

OPTICAL LENS ASSEMBLY AND IMAGING DEVICE

An optical lens assembly and an imaging device including the optical lens assembly are disclosed. The optical lens assembly, from an object side to an image side along an optical axis may sequentially include: a first lens, a second lens, a third lens, a fourth lens and a fifth lens. The first lens is of meniscus shape, at least one of surfaces of the second lens is a convex surface, one of the third and fourth lens has a positive refractive power, and the other has a negative refractive power, wherein the third lens and the fourth lens are cemented to form an cemented lens, at least one of surfaces of the fifth lens is a concave surface, and at least one of the first lens, second lens or the fifth lens has a positive refractive power. 1. An optical lens assembly , from an object side to an image side along an optical axis sequentially comprising: a first lens , a second lens , a third lens , a fourth lens and a fifth lens , whereinthe first lens has refractive power;the second lens has positive refractive power, and an image-side surface thereof is convex;the third lens has refractive power;the fourth lens has refractive power; andthe fifth lens has refractive power;wherein the third and fourth lenses are formed by a biconvex lens and a biconcave lens.2. The optical lens assembly according to claim 1 , wherein the third lens and the fourth lens are cemented to form a cemented lens.3. The optical lens assembly according to claim 1 , wherein the first lens is a meniscus lens.4. The optical lens assembly according to claim 1 , wherein the fifth lens is a meniscus lens or the fifth lens is a biconcave lens.5. The optical lens assembly according to claim 1 , wherein the lens assembly further comprises an additional lens having negative refractive power claim 1 , an object-side surface of the additional lens is convex claim 1 , an image-side surface of the additional lens is a concave surface claim 1 , and the additional lens is arranged between the first lens and the ...

Lens Assembly

A lens assembly includes a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group, all of which are arranged in order from a first side to a second side along an axis. The first lens group is with negative refractive power. The second lens group is with positive refractive power. The third lens group is with refractive power. The fourth lens group is with refractive power. The fifth lens group is with refractive power. The lens assembly further includes a first reflective element disposed between the first lens group and the fifth lens group, wherein the first reflective element includes a first reflective surface.

IMAGING LENS AND IMAGING APPARATUS

The imaging lens substantially consists of a first lens group having a positive refractive power and a second lens group having a positive refractive power, in which the entire second lens group moves along the optical axis to perform focusing. In the imaging lens, the first lens group comprises a positive first lens, a negative second lens, a negative third lens, a positive fourth lens, and a positive fifth lens in this order from the object side. When the Abbe number of the second lens with respect to the d-line is vd2 and the Abbe number of the third lens with respect to the d-line is vd3, conditional formula (1) below is satisfied: 2. The imaging lens of claim 1 , wherein the most-image-side lens in the first lens group is a positive meniscus lens with a convex surface toward the image side.3. The imaging lens of claim 1 , wherein the most-image-side lens of the first lens group has a positive refractive power claim 1 , the lens which is second from the most-image side in the first lens group has a positive refractive power claim 1 , and the lens which is third from the most-image side in the first lens group has a negative refractive power.4. The imaging lens of claim 1 , wherein an aperture stop is disposed between the first lens group and the second lens group.5. The imaging lens of claim 1 , wherein the first lens group comprises the first lens having a positive refractive power which is disposed on the most-object side claim 1 , the second lens having a negative refractive power which is disposed next to the first lens on the image side claim 1 , the third lens having a negative refractive power which is disposed next to the second lens on the image side claim 1 , the fourth lens having a positive refractive power which is disposed next to the third lens on the image side claim 1 , the fifth lens having a positive refractive power which is disposed next to the fourth lens on the image side claim 1 , a sixth lens having a negative refractive power which is ...

Imaging Lens Assembly

An imaging lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power. The first lens element has a convex image-side surface in a paraxial region. The second lens element has a concave object-side surface and a convex image-side surface in a paraxial region, and at least one of its surfaces is aspheric. The object-side surface of the third lens element is convex in a paraxial region and concave in a peripheral region. The image-side surface of the third lens element is concave in a paraxial region. The object-side surface and image-side surface of the third lens element are both aspheric. The imaging lens assembly satisfies 0.062 mm Подробнее

Camera Lens

A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power. The camera lens satisfies specific conditions. 1. A camera lens comprising , lined up from the object side to the image side , a first lens with positive refractive power , a second lens with negative refractive power , a third lens with positive refractive power , and a fourth lens with negative refractive power. The camera lens has the properties meeting following conditions (1)-(3):{'br': None, 'i': F', 'F≦, '1.10≦1/1.25\u2003\u2003(1)'}{'br': None, 'i': F', 'F≦−, '−3.50≦2/2.50\u2003\u2003(2)'}{'br': None, 'i': R', 'R', 'R', 'R, '−1.20≦(1±2)/(1−2)≦−0.65\u2003\u2003(3)'}In whichF: Overall focal distance of the lenses{'b': '1', 'F: The focal distance of the first lens'}{'b': '2', 'F: The focal distance of the second lens'}{'b': '1', 'R: The object side curvature radius of the first lens'}{'b': '2', 'R: The image side curvature radius of the first lens.'}2. The camera lens according to further satisfying the following condition (4):{'br': None, 'i': F', 'F≦, '0.55≦3/0.75\u2003\u2003(4)'}In whichF: Overall focal distance of the lenses{'b': '3', 'F: The focal distance of the third lens.'}3. The camera lens according to further satisfying the following condition (5):{'br': None, 'i': F', 'F≦−, '−0.85≦4/0.65\u2003\u2003(5)'}In whichF: Overall focal distance of the lenses{'b': '4', 'F: The focal distance of the fourth lens.'}4. The camera lens according to further satisfying the following condition (6):{'br': None, 'i': D', 'F≦, '0.05≦4/0.13\u2003\u2003(6)'}In whichF: Overall focal distance of the lenses{'b': '4', 'D: The axial distance between the image side of the second lens and the object side of the third lens.'} The present disclosure is related to a camera lens, and more particularly to a camera lens ...

Camera Lens

A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power. The camera lens satisfies specific conditions. 1. A camera lens comprising , lined up from the object side to the image side , a first lens with positive refractive power , a second lens with negative refractive power , a third lens with positive refractive power , and a fourth lens with negative refractive power , wherein the camera lens satisfies the following conditions (1)-(3):{'br': None, 'i': F', 'F≦, '0.90≦1/1.15 \u2003\u2003(1)'}{'br': None, 'i': F', 'F≦−, '−2.50≦2/1.60 \u2003\u2003(2)'}{'br': None, 'i': R', 'R', 'R', 'R, '0.05≦(1+2)/(1−2)≦0.30 \u2003\u2003(3)'}{'br': None, 'i': R', 'R', 'R', 'R, '1.50≦(3+4)/(3−4)≦3.00 \u2003\u2003(4)'}In which,F: Overall focal distance of the lensesF1: The focal distance of the first lensF2: The focal distance of the second lensR1: The object side curvature radius of the first lensR2: The image side curvature radius of the first lensR3: The object side curvature radius of the second lensR4: The image side curvature radius of the second lens.2. The camera lens according to further satisfying the following condition (5):{'br': None, 'i': F', 'F≦, '0.60≦3/0.95 \u2003\u2003(5)'}In whichF: Overall focal distance of the lensesF3: The focal distance of the third lens.3. The camera lens according to further satisfying the following condition (6):{'br': None, 'i': F', 'F≦−, '−2.50≦4/1.00 \u2003\u2003(6)'}In whichF: Overall focal distance of the lensesF4: The focal distance of the fourth lens. The present disclosure is related to a camera lens, and more particularly to a camera lens comprising 4 lenses.In recent years, a variety of cameras equipped with CCD, CMOS or other camera elements are widely popular. Along with the development of miniature and high performance camera ...

IMAGING LENS AND IMAGING APPARATUS

An imaging lens is constituted by, in order from the object side to the image side, a positive first lens group, a negative second lens group, and a positive third lens group. During focusing operations, the first lens group and the third lens group are fixed, while the second lens group moves. The first lens group has a cemented lens formed by cementing a positive lens and a negative lens together. The second lens group is constituted by two or fewer lenses. The third lens group is constituted by three or more lenses. The surface toward the object side of at least one of the first and second lenses from the object side within the third lens group is concave. A negative lens having a concave surface toward the object side is provided most toward the image side. A predetermined conditional formula is satisfied. 1. An imaging lens consisting of , in order from the object side to the image side:a first lens group having a positive refractive power;a second lens group having a negative refractive power; anda third lens group having a positive refractive power;the first lens group and the third lens group being fixed with respect to an image formation plane and the second lens group moving from the object side to the image side during focusing operations to change focus from that on an object at infinity to that on an object at a proximal distance;the first lens group having at least one cemented lens constituted by two lenses, formed by cementing a positive lens and a negative lens together;the second lens group consisting of two or fewer lenses;the third lens group consisting of three or more lenses;the surface toward the object side of at least one of the lens provided most toward the object side within the third lens group and the lens provided second from the object side within the third lens group being concave;the lens provided most toward the image side within the third lens group being a negative lens having a concave surface toward the object side; and {'br': ...

Camera Lens

A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, and a sixth lens with negative refractive power. The camera lens satisfies specific conditions. The present disclosure is related to a camera lens, and more particularly to a camera lens comprising 6 lenses.In recent years, a variety of cameras equipped with CCD, CMOS or other camera elements are widely popular. Along with the development of miniature and high performance camera elements, the ultrathin and high-luminous flux (Fno) wide-angle camera lenses with excellent optical properties are needed in society.The technology related to the camera lens composed of six ultra-thin, high-luminous flux f value (Fno) wide angle lenses with excellent optical properties is developed gradually. The camera lens mentioned in the proposal is composed of 6 lenses, lined up from the object side as follows: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power.The camera lens in embodiments 1 to 3 in the special published bulletin No. 2014-052631 is composed of 6 lenses described above, but the distribution of the refractive power of the second lens and the shape of the third lens are inadequate, therefore TTL/IH≧1.941, and ultrathin degree is not sufficient.The camera lens disclosed in embodiments 1 to 3 of Japan patent document No. 5651881 is composed of 6 lenses, but, the distribution of the refractive power of the second lens and the third lens, the shape of the second lens are inadequate, therefore TTL/IH≧1.464 and ultrathin degree is not sufficient.Therefore, it is ...

Camera Lens

A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power. The camera lens satisfies specific conditions. 1. A camera lens comprising , lined up from the object side to the image side , a first lens with positive refractive power , a second lens with negative refractive power , a third lens with positive refractive power , a fourth lens with positive refractive power , and a fifth lens with negative refractive power , wherein the camera lens satisfies the following conditions (1)-(6):{'br': None, 'i': F', 'F≦, '0.62≦1/0.71\u2003\u2003(1)'}{'br': None, 'i': F', 'F≦−, '−1.60≦2/1.00\u2003\u2003(2)'}{'br': None, 'i': F', 'F≦, '25.00≦3/150.00\u2003\u2003(3)'}{'br': None, 'i': R', 'R', 'R', 'R, '−1.00≦(1+2)/(1−2)≦−0.85\u2003\u2003(4)'}{'br': None, 'i': R', 'R', 'R', 'R, '1.20≦(7+8)/(7−8)≦3.00\u2003\u2003(5)'}{'br': None, 'i': D', 'F≦, '0.10≦6/0.15\u2003\u2003(6)'}In whichF: Overall focal distance of the lenses;F1: The focal distance of the first lens;F2: The focal distance of the second lens;F3: The focal distance of the third lens;R1: The object side curvature radius of the first lens;R2: The image side curvature radius of the first lens;R7: The object side curvature radius of the fourth lens;R8: The image side curvature radius of the fourth lens;D6: The axial distance between the image side of the third lens and the object side of the fourth lens.2. The camera lens according to further satisfying the following condition (7):{'br': None, 'i': R', 'R', 'R', 'R, '0.15≦(3+4)/(3−4)≦1.20\u2003\u2003(7)'}In whichR3: The object side curvature radius of the second lens;R4: The image side curvature radius of the second lens.3. The camera lens according to further satisfying the following condition (8):{'br': None, 'i': D', 'F≦, '0.02≦8/0. ...

IMAGING LENS

An imaging lens includes a first lens group having positive refractive power; a second lens group having positive refractive power; and a third lens group having negative refractive power, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens, and a third lens. The second lens group includes a fourth lens having positive refractive power and a fifth lens having negative refractive power. The third lens group includes a sixth lens and a seventh lens having negative refractive power. The seventh lens is formed in a shape so that a surface thereof on the object side and a surface thereof on the image plane side have positive curvature radii. The surface of the seventh lens on the image plane side is formed in an aspheric shape having at least one inflexion point. 1. An imaging lens comprising:a first lens group having positive refractive power;a second lens group having positive refractive power; anda third lens group having negative refractive power, arranged in this order from an object side to an image plane side,wherein said first lens group includes a first lens having positive refractive power, a second lens, and a third lens,said second lens group includes a fourth lens having positive refractive power and a fifth lens having negative refractive power,said third lens group includes a sixth lens and a seventh lens having negative refractive power,said seventh lens is formed in a shape so that a surface thereof on the object side and a surface thereof on the image plane side have positive curvature radii, andsaid surface of the seventh lens on the image plane side is formed in an aspheric shape having at least one inflexion point.2. The imaging lens according to claim 1 , wherein said second lens has a focal length f2 and said third lens has a focal length f3 so that the following conditional expression is satisfied:{'br': None, 'i': f', 'f, '0.1<2/3<0.6.'}7. An ...

MICROSCOPE OPTICAL SYSTEM

A microscope optical system includes a first lens group having a positive power, a second lens group, and a third lens group including a positive lens. The first lens group includes: a first lens component arranged closest to an object, the first lens component including a first meniscus lens that has a meniscus shape with a concave surface facing the object side; a second lens component having a positive power that has a meniscus lens shape with the concave surface facing the object side; and a cemented lens including a positive lens and a negative lens that is made of a higher-dispersion material than a material of the positive lens. When NA, β, D, Drepresent a numerical aperture of the microscope optical system, a lateral magnification of the third lens group, a spacing between the third lens group and an image plane, a spacing between the second lens group and the third lens group, the microscope optical system satisfies the following conditional expressions: 1. A microscope optical system comprising in order from an object side:a first lens group having a positive refractive power;a second lens group; anda third lens group including a positive lens, wherein a first lens component that is arranged closest to an object, the first lens component including a first meniscus lens that has a meniscus shape with a concave surface facing the object side;', 'a second lens component having a positive refractive power that has a meniscus lens shape with the concave surface facing the object side, the second lens component being arranged close to the first lens component on an image side of the first lens component; and', 'a cemented lens including a positive lens and a negative lens that is made of a higher-dispersion material than a material of the positive lens,, 'the first lens group includesa height of an on-axis marginal ray becomes maximum in a lens component closest to an image in the first lens group,a spacing between the second lens group and the third lens group ...

Calibration of photoelectromagnetic sensor in a laser source

In a laser-produced plasma (LPP) extreme ultraviolet (EUV) system, laser pulses are used to produce EUV light. To determine the energy of individual laser pulses, a photoelectromagnetic (PEM) detector is calibrated to a power meter using a calibration coefficient. When measuring a unitary laser beam comprising pulses of a single wavelength, the calibration coefficient is calculated based on a burst of the pulses. A combined laser beam has main pulses of a first wavelength alternating with pre-pulses pulses of a second wavelength. To calculate the energy of the main pulses in the combined laser beam, the calibration coefficient calculated for a unitary laser beam of the main pulses is used. To calculate the energy of the pre-pulses in the combined laser beam, a new calibration coefficient is calculated. When the calculated energy values drift beyond a pre-defined threshold, the calibration coefficients are recalculated.

MOBILE DEVICE AND OPTICAL IMAGING LENS THEREOF

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises five lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements to allow the thickness of the second lens element and air gaps between the five lens elements along the optical axis satisfying the relation 1.400≦AG/AG≦4.615, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened. 1. An optical imaging lens comprising , from an object side to an image side , a first lens element , a second lens element , a third lens element , a fourth lens element , and a fifth lens element , each of the first , second , third , fourth and fifth lens element having an object-side surface facing toward the object side and an image-side surface facing toward the image side , wherein:the first lens element has a positive refracting power, and the object-side surface of the first lens element has a convex portion in a vicinity of an optical axis and a convex portion near a circumference of the first lens element;the second lens element has a negative refracting power, and the image-side surface of the second lens element has a concave portion in a vicinity of the optical axis;the object-side surface of the third lens element has a concave portion near a circumference of the third lens element;the object-side surface of the fourth lens element has a concave portion near a circumference of the fourth lens element, and the image-side surface of the fourth lens element has a convex portion near the circumference of the fourth lens element;the object-side surface of the fifth lens element has a convex portion near a circumference of the fifth lens element, and the image-side surface of the fifth lens element has a concave portion in a vicinity of the optical axis and a convex portion near a circumference of ...

IMAGING LENS AND IMAGING APPARATUS

An imaging lens consists of, in order from the object side, a negative first lens, a positive second lens, a positive third lens, a negative fourth lens, a positive fifth lens, and a positive sixth lens. The imaging lens satisfies the condition expressions below: 5. The imaging lens as claimed in claim 1 , wherein the first lens is made of a material having an Abbe number with respect to the d-line of 40 or more claim 1 , the second lens is made of a material having an Abbe number with respect to the d-line of 55 or more claim 1 , the third lens is made of a material having an Abbe number with respect to the d-line of 30 or more claim 1 , the fourth lens is made of a material having an Abbe number with respect to the d-line of 25 or less claim 1 , the fifth lens is made of a material having an Abbe number with respect to the d-line of 30 or more claim 1 , and the sixth lens is made of a material having an Abbe number with respect to the d-line of 30 or more.15. The imaging lens as claimed in claim 1 , wherein an aperture stop is disposed between an image-side surface of the fourth lens and an object-side surface of the second lens.20. An imaging apparatus comprising the imaging lens as claimed in . This application is a Continuation of PCT International Application No. PCT/JP2013/007605 filed on Dec. 26, 2013, which claims priority under 35 U.S.C. §119(a) to Japanese Patent Application No. 2013-063272 filed on Mar. 26, 2013. Each of the above applications is hereby expressly incorporated by reference, in its entirety, into the present application.The present disclosure relates to an imaging lens and an imaging apparatus, and more particularly to an imaging lens that is preferably usable with an onboard camera, a camera for a mobile terminal, a monitoring camera, etc., using an image sensor, such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor), and an imaging apparatus provided with the imaging lens.Image sensors, such as CCDs and ...

IMAGING LENS AND IMAGING APPARATUS

An imaging lens composed of a positive first lens group, an aperture stop, a negative second lens group, and a positive third lens group disposed in order from the object side. The first lens group includes one negative lens and one positive lens disposed in order from the object side. The second lens group includes one negative lens and one positive lens, has at least one aspherical surface, and is composed of three lenses or less, in which the most object side surface and the most image side surface of the second lens group are concave and convex surfaces respectively. The third lens group is composed of a negative lens with a concave surface on the object side and one or more positive lenses disposed in order from the object side. 1. An imaging lens composed of a first lens group having a positive refractive power , an aperture stop , a second lens group having a negative refractive power , and a third lens group having a positive refractive power disposed in order from the object side , wherein:the first lens group includes one negative lens and one positive lens disposed in order from the object side;the second lens group is composed of three lenses or less, includes one negative lens and one positive lens, and has at least one aspherical surface, wherein the most object side surface of the second lens group is a concave surface and the most image side surface of the second lens group is a convex surface; andthe third lens group is composed of one negative lens with a concave surface on the object side and one or more positive lenses disposed in order from the object side.3. The imaging lens as claimed in claim 1 , wherein the second lens group is composed of three lenses of a negative lens with a concave surface on the object side claim 1 , a positive lens with a convex surface on the image side claim 1 , and an aspherical lens disposed in order from the object side.5. The imaging lens as claimed in claim 4 , wherein the imaging lens satisfies a conditional ...

IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS

An imaging lens is constituted by six lenses, including, in order from the object side to the image side: a positive first lens having a convex surface toward the object side; a negative second lens; a positive third lens, which is a meniscus lens having a convex surface toward the object side; a positive fourth lens; a negative fifth lens having a concave surface toward the object side; and a negative sixth lens, of which the image toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Conditional formulae related to the focal length f of the entire lens system, the focal length f of the first lens, and the focal length f of the fourth lens is satisfied. 3. An imaging apparatus as defined in claim 1 , wherein:the second lens is a meniscus lens having a convex surface toward the object side.4. An imaging lens as defined in claim 1 , wherein:the fourth lens is a meniscus lens having a concave surface toward the object side.6. An imaging lens as defined in claim 1 , further comprising:an aperture stop positioned at the object side of the surface of the second lens toward the object side.7. An imaging lens as defined in claim 1 , in which the conditional formula below is further satisfied:{'br': None, 'i': 'f/f', '1.55<4<2.5\u2003\u2003(1-1)'}8. An imaging lens as defined in claim 1 , in which the conditional formula below is further satisfied:{'br': None, 'i': 'f/f', '0.6<1<0.95\u2003\u2003(2-1)'}{'b': '1', 'wherein f is the focal length of the first lens.'}9. An imaging lens as defined in claim 1 , in which the conditional formula below is further satisfied:{'br': None, 'i': 'f/f', '−0.2<23456<0.3\u2003\u2003(3-1)'}{'b': '23456', 'wherein f is the combined focal length of the second lens through the sixth lens.'}10. An imaging lens as defined in claim 1 , in which the conditional formula below is further satisfied:{'br': None, 'i': R', 'f−R', 'r', 'R', 'f+R', 'r, '−0.65<(11)/( ...

IMAGING LENS AND IMAGING APPARATUS PROVIDED WITH THE SAME

An imaging lens consists of five lenses consisting of, in order from the object side, a biconvex first lens, a biconcave second lens, a positive third lens having a meniscus shape with the convex surface toward the image side, a positive fourth lens having a meniscus shape with the convex surface toward the image side, and a negative fifth lens having a concave surface toward the image side, and having at least one inflection point on the image-side surface thereof, wherein condition expression (1), 0 Подробнее

IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS

An imaging lens is constituted by, in order from the object side to the image side: a negative front group; a stop; and a positive rear group. The front group is constituted by, in order from the object side to the image side, a front group negative lens group, constituted by at least two negative lenses, and a front group positive lens group including one negative lens and one positive lens, in which a positive lens is provided most toward the object side. The rear group includes one negative lens and one positive lens. Conditional Formula (1) below is satisfied: 1. An imaging lens consisting of , in order from the object side to the image side:a front group having a negative refractive power;a stop; anda rear group having a positive refractive power;the front group consisting of, in order from the object side to the image side, a front group negative lens group having a negative refractive power, constituted by at least two negative lenses, and a front group positive lens group having a positive refractive power, including one negative lens and one positive lens, in which a positive lens is provided most toward the object side;the rear group including two cemented lenses formed by cementing a positive lens and a negative lens together, the coupling surfaces of both of the two cemented lenses being concave toward the object side; and {'br': None, 'Nan+0.01·νan<2.15 \u2003\u2003(1)'}, 'Conditional Formula (1) below being satisfiedwherein Nan is the refractive index of the negative lens provided most toward the image side within the front group positive lens group with respect to the d line, and νan is the Abbe's number of the negative lens provided most toward the image side within the front group positive lens group with respect to the d line.2. An imaging lens consisting of , in order from the object side to the image side:a front group having a negative refractive power;a stop; anda rear group having a positive refractive power;the front group consisting of, in ...

IMAGING LENS

An imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens sequentially arranged from a magnifying side to a narrowing side. The second lens and the third lens constitute a first composite lens, the fourth lens and the fifth lens constitute a second composite lens, and the sixth lens and the seventh lens constitute a third composite lens. The imaging lens has the advantages of small size and good imaging quality. 1. An imaging lens , comprising:a first lens;a second lens;a third lens;a fourth lens;a fifth lens;a sixth lens;a seventh lens; andan eighth lens,wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged from a magnifying side to a narrowing side, the second lens and the third lens constitute a first composite lens, the fourth lens and the fifth lens constitute a second composite lens, and the sixth lens and the seventh lens constitute a third composite lens.2. The imaging lens according to claim 1 , wherein the first lens has a positive refractive power claim 1 , the second lens has a positive refractive power claim 1 , the third lens has a negative refractive power or a positive refractive power claim 1 , the fourth lens has a negative refractive power claim 1 , the fifth lens has a positive refractive power claim 1 , the sixth lens has a negative refractive power claim 1 , the seventh lens has a positive refractive power claim 1 , and the eighth lens has a positive refractive power.3. The imaging lens according to claim 2 , wherein the first lens is a biconvex lens or a meniscus shaped lens or a plano-convex lens bulging toward the magnifying side.4. The imaging lens according to claim 2 , wherein a surface of the second lens facing the magnifying side is a convex curved surface claim 2 , a surface of the third lens facing the narrowing side is a concave curved ...

OPTICAL LENS ASSEMBLY

An optical lens assembly includes a first lens element, a second lens element, a third lens element, and a fourth lens element from an object side to an image side in order along an optical axis. The first lens element to the fourth lens element each include an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through. The object-side surface of the first lens element has a convex portion in a vicinity of the optical axis. The second lens element has positive refracting power, and the object-side surface of the second lens element has a concave portion in a vicinity of a periphery of the second lens element. The third lens element is made of glass having an Abbe number greater than 60. 1. An optical lens assembly comprising a first lens element , a second lens element , a third lens element , and a fourth lens element from an object side to an image side in order along an optical axis , wherein the first lens element to the fourth lens element each comprise an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through;the first lens element has negative refracting power, and the object-side surface of the first lens element has a convex portion in a vicinity of the optical axis;the second lens element has positive refracting power, and the object-side surface of the second lens element has a concave portion in a vicinity of a periphery of the second lens element;the third lens element is made of glass having an Abbe number greater than 60; andat least one of the object-side surface and the image-side surface of the fourth lens element is an aspheric surface,wherein a quantity of lens elements having refracting power of the optical lens assembly is only four,wherein the optical lens assembly satisfies: ALT/G34≦6.4, where ALT is a ...

Optical imaging lens

Present embodiments provide for an optical imaging lens. The optical imaging lens comprises a first lens element, a second lens element, a third lens element and a fourth lens element positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens shows better optical characteristics and enlarge field angle while the total length of the optical imaging lens is shortened.

OPTICAL IMAGING LENS

An optical imaging lens includes a first lens element, a second lens element, an aperture stop, a third lens element, and a fourth lens elements arranged in sequence from an object side to an image side along an optical axis, and each lens element has an object-side surface and an image-side surface. The first lens element has negative refracting power. The object-side surface of the second lens element has a concave portion in a vicinity of the optical axis. The image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery of the fourth lens element. 1. An optical imaging lens , comprising a first lens element , a second lens element , an aperture stop , a third lens element , and a fourth lens element arranged in sequence from an object side to an image side along an optical axis , and each of the first lens element to the fourth lens element comprising an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through;the first lens element having negative refracting power;the object-side surface of the second lens element having a concave portion in a vicinity of the optical axis;the object-side surface of the third lens element having a convex portion in a vicinity of a periphery of the third lens element;the object-side surface of the fourth lens element having a concave portion in a vicinity of the optical axis, and the image-side surface of the fourth lens element having a convex portion in a vicinity of a periphery of the fourth lens element, {'br': None, 'i': ALT', 'G', 'G', 'T', 'T', 'G', 'ALT/T, '/(12+34)≦2.4,(2+3)/23≧3.0 and 1≧6.0,'}, 'wherein a quantity of lens elements having refracting power of the optical imaging lens is only four, and the optical imaging lens satisfieswherein, ALT is a sum of four thicknesses of the first lens element, the second lens element, the third lens element, and the fourth ...

OPTICAL IMAGING LENS

Present embodiments provide for an optical imaging lens. The optical imaging lens may comprise four lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens may exhibit better optical characteristics and the total length of the optical imaging lens may be shortened. 1. An optical imaging lens , sequentially from an object side to an image side along an optical axis , comprising first , second , third , and fourth lens elements , each of the first , second , third , and fourth lens elements having a refracting power , an object-side surface facing toward the object side and an image-side surface facing toward the image side and a central thickness defined along an optical axis , wherein:the image-side surface of the first lens element comprises a concave portion in a vicinity of the optical axis;the second lens element has a positive refracting power;the object-side surface of the third lens element comprises a convex portion in a vicinity of a periphery of the third lens element, the image-side surface of said third lens element comprises a convex portion in a vicinity of a periphery of the third lens element;the image-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of the fourth lens element;a sum of a central thicknesses of all four lens elements along the optical axis is represented by ALT, an air gap between the first lens element and the second lens element along the optical axis is represented by G12, an air gap between the second lens element and the third lens element along the optical axis is represented by G23, an air gap between the third lens element and the fourth lens element along the optical axis is represented by G34, a sum of G12, G23, and G34 is represented ...

Optical image capturing system

The invention discloses a three-piece optical lens for capturing image and a five-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

OPTICAL IMAGE CAPTURING SYSTEM

The invention discloses a three-piece optical lens for capturing image and a five-piece optical module for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with positive refractive power; a second lens with refractive power; and a third lens with refractive power; and at least one of the image-side surface and object-side surface of each of the three lens elements are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras. 1. An optical image capturing system , in order along an optical axis from an object side to an image side , comprising:a first lens having refractive power;a second lens having refractive power;a third lens having refractive power; andan image plane;wherein the optical image capturing system consists of the three lenses with refractive power; at least one lens among the first lens to the third lens has positive refractive power; each lens among the first lens to the third lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; [{'br': None, 'i': 'f/HEP≦', '1≦10;'}, {'br': None, 'i': 'HAF', '0 deg<≦150 deg; and'}, {'br': None, 'i': 'ARE/HEP', '0.9≦2()≦2.0;'}], 'wherein the optical image capturing system satisfieswhere f1, f2, and f3 are focal lengths of the first lens to the third lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance between an object-side surface of the first lens and the image plane on the optical axis; InTL is a distance in parallel with the optical axis from the object-side surface of the first lens to the image-side surface of the third lens; HAF is a half of a maximum view angle of the optical image capturing system; for any surface of any lens, ARE is a profile curve length measured from a start point where the ...

OPTICAL IMAGING LENS ASSEMBLY, IMAGE CAPTURING APPARATUS AND ELECTRONIC DEVICE

The present disclosure provides an optical imaging lens assembly comprising, in order from an object side to an image side: a first lens element having negative refractive power; a second lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; a third lens element having positive refractive power; a fourth lens element having positive refractive power; a fifth lens element having positive refractive power; and a sixth lens element; wherein the optical imaging lens assembly has a total of six lens elements. With such configuration, the optical imaging lens assembly of the present disclosure is characterized by a a wide field of view, a compact size and high image quality. 1. An optical imaging lens assembly , comprising , in order from an object side to an image side:a first lens element having negative refractive power;a second lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof;a third lens element having positive refractive power;a fourth lens element having positive refractive power;a fifth lens element having positive refractive power; anda sixth lens element having negative refractive power; [{'br': None, 'i': CT', 'CT, '0<3/2<1.0;'}, {'br': None, 'i': 'f/T', '0<12<5.50;'}, {'br': None, 'i': 'BL/ΣAT<', '0.15<1.70; and'}, {'br': None, 'i': 'f/EPD<', '0.80<5.0.'}], 'wherein the optical imaging lens assembly has a total of six lens elements; and wherein a central thickness of the second lens element is CT2, a central thickness of the third lens element is CT3, a focal length of the optical imaging lens assembly is f, an axial distance between the first lens element and the second lens element is T12, an axial distance between the image-side surface of the sixth lens element and an image surface is BL, a ...

OPTICAL IMAGE CAPTURING SYSTEM

A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens element with refractive power, a second lens element with refractive power, a third lens element with refractive power, a fourth lens element with refractive power, a fifth lens element with refractive power and a sixth element lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras. 1. An optical image capturing system , from an object side to an image side , comprising:a first lens element with refractive power;a second lens element with refractive power;a third lens element with refractive power;a fourth lens element with refractive power;a fifth lens element with refractive power;a sixth lens element with refractive power; andan image plane,wherein the optical image capturing system comprises six lens elements with refractive powers at least one lens element among the first through sixth lens elements has positive refractive power; focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6, respectively; a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, and a distance on the optical axis from an object-side surface of the first lens element to the image plane is HOS; a distance on the optical axis from the object-side surface of the first lens element to an image-side surface of the sixth lens element is InTL; half of a maximum angle of view of the optical image capturing system is HAF; thicknesses of the first through sixth lens elements at a height of ½ HEP and in parallel with the optical axis are ETP1, ETP2, ETP3, ETP4, ETP5 and ETP6, respectively; a ...

OPTICAL IMAGE CAPTURING SYSTEM

A six-piece optical lens for capturing image and a six-piece optical module for capturing image are provided. In the order from an object side to an image side, the optical lens along the optical axis includes a first lens element with refractive power, a second lens element with refractive power, a third lens element with refractive power, a fourth lens element with refractive power, a fifth lens element with refractive power and a sixth element lens with refractive power. At least one of the image-side surface and object-side surface of each of the six lens elements is aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras. 1. An optical image capturing system , from an object side to an image side , comprising:a first lens element with refractive power;a second lens element with refractive power;a third lens element with refractive power;a fourth lens element with refractive power;a fifth lens element with refractive power;a sixth lens element with refractive power;an image plane;wherein the optical image capturing system comprises six lens elements with refractive powers, at least one lens element among the first through sixth lens elements has at least one inflection point on at least one surface thereof, at least one lens element among the first through sixth lens elements has positive refractive power, focal lengths of the first through sixth lens elements are f1, f2, f3, f4, f5 and f6 respectively, a focal length of the optical image capturing system is f, an entrance pupil diameter of the optical image capturing system is HEP, a distance on an optical axis from an object-side surface of the first lens element to the image plane is HOS, a distance on an optical axis from the object-side surface of the first lens element to the image-side surface of the sixth lens element is InTL, a half of a maximum view angle of the optical image capturing system is HAF; an outline curve starting from an axial ...

OPTICAL IMAGE CAPTURING SYSTEM

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. At least one lens among the first to the sixth lenses has positive refractive force. The seventh lens can have negative refractive force, wherein both surfaces thereof are aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the seventh lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras. 1. An optical image capturing system , in order along an optical axis from an object side to an image side , comprising:a first lens having refractive power;a second lens having refractive power;a third lens having refractive power;a fourth lens having refractive power;a fifth lens having refractive power;a sixth lens having refractive power;a seventh lens having refractive power; andan image plane;wherein the optical image capturing system consists of the seven lenses with refractive power; at least one lens among the first lens to the third lens has positive refractive power; at least one lens among the fourth lens to the seventh lens has positive refractive power; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; [{'br': None, 'i': 'f/HEP≦', '1.0≦10.0;'}, {'br': None, 'i': 'HAF', '0 deg<≦150 deg; and'}, {'br': None, 'i': 'ARE/HEP', '0.9≦2()≦2.0;'}], 'wherein the optical image capturing system satisfieswhere f1, f2, f3, f4, f5, f6, and f7 are focal lengths of the first lens to the seventh lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance in ...

OPTICAL IMAGE CAPTURING SYSTEM

An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. At least one lens among the first to the sixth lenses has positive refractive force. The seventh lens has negative refractive force, wherein both surfaces thereof can be aspheric, and at least one surface thereof has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the seventh lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras. 1. An optical image capturing system , in order along an optical axis from an object side to an image side , comprising:a first lens having refractive power;a second lens having refractive power;a third lens having refractive power;a fourth lens having refractive power;a fifth lens having refractive power;a sixth lens having refractive power;a seventh lens having refractive power; andan image plane;wherein the optical image capturing system consists of the seven lenses with refractive power; at least one lens among the first to the third lenses has positive refractive power; at least one lens among the fourth to the seventh lenses has positive refractive power; each lens of the first to the seventh lenses has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; [{'br': None, 'i': 'f/HEP≦', '1.0≦10.0;'}, {'br': None, 'i': 'HAF≦', '0 deg<150 deg; and'}, {'br': None, 'i': 'SETP/STP<', '0.5≦1;'}], 'wherein the optical image capturing system satisfies{'b': 1', '2', '3', '4', '5', '6', '7', '1', '7, 'where f1, f2 f3, f4, f5, f6, and f7 are focal lengths of the first lens to the seventh lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing ...

Optical image capturing system

An optical image capturing system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element and the third lens element have refractive power. The fourth lens element with negative refractive power has a concave object-side surface and a convex image-side surface. The fifth lens element with positive refractive power has a convex object-side surface, wherein at least one inflection point is on at least one surface thereof. The sixth lens element with negative refractive power has a concave object-side surface. The surfaces of the fifth and the sixth lens elements are aspheric. The optical image capturing system has a total of six lens elements.

OPTICAL IMAGE CAPTURING LENS SYSTEM

This disclosure provides an optical image capturing lens system comprising: a positive first lens element having a convex object-side surface, a negative second lens element, a positive third lens element having a convex image-side surface, a fourth lens element having a concave object-side surface and a convex image-side surface; and a positive fifth lens element having a convex object-side surface at a paraxial region thereof, both of the object-side and image-side surfaces being aspheric, and at least one inflection point is positioned on at least one of the object-side and image-side surfaces thereof. When particular relations are satisfied, the angle at which light projects onto the image plane can be efficiently controlled for increasing the relative illumination and preventing the occurrence of vignetting. 1. An optical image capturing lens system comprising five lens elements , the five lens elements being , in order from an object side to an image side: a first lens element , a second lens element , a third lens element , a fourth lens element and a fifth lens element , and there is a gap between every two adjacent lens elements;wherein the first lens element has positive refractive power and an object-side surface being convex at a paraxial region thereof, the fourth lens element has negative refractive power and at least one of an object-side surface thereof and an image-side surface thereof being aspheric, the fifth lens element has an image-side surface being concave at paraxial region thereof and at least one inflection point formed on at least one of an object-side surface and the image-side surface of the fifth lens element, an absolute value of a focal length of the fourth lens element is smaller than an absolute value of a focal length of third lens element, and an absolute value of a curvature radius of an image-side surface of the fourth lens element is smaller than an absolute value of a curvature radius of an image-side surface of the fifth ...

Multi-Focal Lens

An imaging lens structure and method of imaging are presented. The imaging lens structure comprising a lens region defining an effective aperture of the lens structure. The lens region comprises an arrangement of lens zones distributed within the lens region and comprising zones of at least two different optical functions differently affecting light passing therethrough. The zones of at least two different optical functions are arranged in an interlaced fashion along said lens region corresponding to a surface relief of the lens region such that adjacent lens zones of different optical functions are spaced apart from one another along an optical axis of the lens structure a distance larger than a coherence length of light at least one spectral range for which said lens structure is designed. 1. An imaging lens structure comprising a lens region defining an effective aperture of the lens structure , said lens region comprising an arrangement of lens zones distributed within the lens region and comprising zones of at least two different optical functions differently affecting light passing therethrough , said zones of at least two different optical functions being arranged in an interlaced fashion along said lens region corresponding to a surface relief of the lens region such that adjacent lens zones of different optical functions are spaced apart from one another along an optical axis of the lens structure a distance larger than a coherence length of light at least one spectral range for which said lens structure is designed.223-. (canceled)24. An imaging lens structure comprising a multi-focal lens region comprising a plurality of lens zones of at least two different focal lengths , said lens zones being arranged in an interlaced fashion within a surface of said multi-focal lens region such that the lens zone of one focal length is surrounded by lens zones of one or more different focal lengths and the lens zones of the same focal length are arranged on said ...

OPTICAL SYSTEM, OPTICAL EQUIPMENT, AND MANUFACTURING METHOD FOR OPTICAL SYSTEM

An optical system comprises, in order from an object side, a front group GF having positive refractive power, an aperture stop S and a rear group GR. The front group 2. An optical system comprises , in order from an object side , a front group having positive refractive power , an aperture stop , and a rear group having positive refractive power;said front group including, in order from the object side, a positive lens group having positive refractive power, and a front focusing group having positive refractive power;said rear group including, in order from the object side, a rear focusing group having positive refractive power and a negative lens group having negative refractive power; andupon carrying out focusing, said front focusing group and said rear focusing group being moved in the direction of the optical axis; anda lens located at a most object side having negative refractive power.3. An optical system according to claim 2 , wherein upon carrying out focusing claim 2 , said positive lens group is fixed in position.4. An optical system according to claim 2 , wherein upon carrying out focusing claim 2 , a lens group located at a most image side is fixed in position.5. An optical system according to claim 2 , wherein upon carrying out focusing claim 2 , said front focusing group is moved toward the object side.6. An optical system according to claim 2 , wherein upon carrying out focusing claim 2 , said rear focusing group is moved toward the object side.7. An optical system according to claim 1 , wherein claim 1 , upon carrying out focusing claim 1 , said aperture stop is fixed in position.11. An optical system according to claim 1 , wherein upon carrying out focusing claim 1 , said lens group located at the most object side is fixed in position.12. An optical system according to claim 1 , wherein claim 1 , upon carrying out focusing claim 1 , said lens group located at the most image side is fixed in position.13. An optical system according to claim 1 , ...

FOUR-PIECE INFRARED SINGLE WAVELENGTH LENS SYSTEM

A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power, a second lens element with a positive refractive power, a third lens element with a negative refractive power, a fourth lens element with a positive refractive power. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, high resolution, short length and less distortion. 1. A four-piece infrared single wavelength lens system , in order from an object side to an image side , comprising:a stop;a first lens element with a positive refractive power, having an object-side surface being convex near an optical axis and an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the first lens element being aspheric;a second lens element with a positive refractive power, having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the second lens element being aspheric;a third lens element with a negative refractive power, having an object-side surface being concave near the optical axis and an image-side surface being convex near the optical axis, at least one of the object-side surface and the image-side surface of the third lens element being aspheric; anda fourth lens element with a positive refractive power, having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis, at least one of the object-side surface and the image-side surface of the fourth lens element being aspheric;wherein a focal length of the second lens element is f2, a focal length of the third lens element is f3, and they satisfy the relation: −42 Подробнее

IMAGING LENS

An imaging lens includes a first lens having at least one aspheric surface; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The first lens is formed in a shape so that a surface on the object side is convex near an optical axis. The seventh lens is formed in a shape so that a surface on the image plane side is concave near the optical axis. The fifth lens and the sixth lens have specific Abbe's numbers. 1. An imaging lens comprising:a first lens having at least one aspheric surface;a second lens having at least one aspheric surface;a third lens having at least one aspheric surface;a fourth lens having at least one aspheric surface;a fifth lens having at least one aspheric surface;a sixth lens having two aspheric surfaces; anda seventh lens having two aspheric surfaces, arranged in this order from an object side to an image plane side respectively with a space in between,wherein said imaging lens has a total of seven lenses,said first lens is formed in a shape so that a surface thereof on the object side is convex near an optical axis thereof,said seventh lens is formed in a shape so that a surface thereof on the image plane side is concave near an optical axis thereof, and [{'br': None, '20<νd5<35,'}, {'br': None, '20<νd6<35.'}], "said fifth lens has an Abbe's number νd5 and said sixth lens has an Abbe's number νd6 so that the following conditional expressions are satisfied:"}2. The imaging lens according to claim 1 , wherein said first lens has an Abbe's number νd1 claim 1 , said second lens has an Abbe's number νd2 claim 1 , and said third lens has an Abbe's number νd3 so ...

IMAGING LENS

An imaging lens includes a first lens having at least one aspheric surface and positive refractive power; a second lens having at least one aspheric surface; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens having at least one aspheric surface; a sixth lens having two aspheric surfaces; and a seventh lens having two aspheric surfaces and negative refractive power, arranged in this order from an object side to an image plane side respectively with a space in between. The imaging lens has a total of seven lenses. The fourth lens and the sixth lens have specific Abbe's numbers. 1. An imaging lens comprising:a first lens having at least one aspheric surface and positive refractive power;a second lens having at least one aspheric surface;a third lens having at least one aspheric surface;a fourth lens having at least one aspheric surface;a fifth lens having at least one aspheric surface;a sixth lens having two aspheric surfaces; anda seventh lens having two aspheric surfaces and negative refractive power, arranged in this order from an object side to an image plane side respectively with a space in between,wherein said imaging lens has a total of seven lenses, and [{'br': None, 'i': 'd', '40<ν4<75,'}, {'br': None, 'i': 'd', '20<ν6<35.'}], "said fourth lens has an Abbe's number νd4 and said sixth lens has an Abbe's number νd6 so that the following conditional expressions are satisfied:"}2. The imaging lens according to claim 1 , wherein said first lens has an Abbe's number νd1 claim 1 , said second lens has an Abbe's number νd2 claim 1 , and said third lens has an Abbe's number νd3 so that the following conditional expressions are satisfied:{'br': None, 'i': 'd', '40<ν1<75,'}{'br': None, 'i': 'd', '20<ν2<35,'}{'br': None, 'i': 'd', '40<ν3<75.'}3. The imaging lens according to claim 1 , wherein said seventh lens has an Abbe's number νd7 so that the following conditional expression is satisfied:{'br': None, ' ...

ZOOM LENS AND IMAGE PICKUP APPARATUS

A zoom lens includes lens units whose interval between adjacent units is changed during zooming, wherein the lens units consist of, in order from an object side, a positive first unit, an negative intermediate lens group including a unit, a positive (n−1)-th unit, and a positive n-th unit, wherein the first unit moves during zooming, wherein an interval between the (n−1)-th and n-th units is smaller at telephoto end than at wide angle end, wherein the n-th unit includes positive lenses LPL made of a material having proper Abbe number, wherein the n-th lens unit includes a positive lens LPH arranged on the image side of the lenses LPL and made of a material having proper refractive index and wherein a distance between lens surfaces on the most-object side and on the most-image side of the n-th lens unit, and back focus at the wide angle end are properly set. 10. The zoom lens according to claim 1 ,wherein the intermediate lens group consists of a second lens unit having a negative refractive power arranged adjacent to and on the image side of the first lens unit, andwherein the second lens unit is configured to move during focusing.11. The zoom lens according to claim 1 ,wherein the intermediate lens group consists of a second lens unit having a negative refractive power arranged adjacent to and on the image side of the first lens unit, and a third lens unit having a negative refractive power arranged on the image side of the second lens unit, andwherein the third lens unit is configured to move during focusing.12. The zoom lens according to claim 1 , wherein an interval between a lens unit arranged adjacent to and on the object side of the (n−1)-th lens unit and the (n−1)-th lens unit is smaller at the telephoto end than at the wide angle end.13. The zoom lens according to claim 1 ,wherein the intermediate lens group includes a second lens unit having a negative refractive power arranged adjacent to and on the image side of the first lens unit, andwherein an ...

APODIZED REFLECTIVE OPTICAL ELEMENTS FOR EYE-TRACKING AND OPTICAL ARTIFACT REDUCTION

Techniques disclosed herein relate to a near-eye display system. One example of an eye-tracking system includes a substrate transparent to visible light and infrared light and a reflective holographic grating conformally coupled to a surface of the substrate. The reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking. The refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light. 1. An eye-tracking system comprising:a substrate transparent to visible light and infrared light; and the reflective holographic grating is configured to transmit the visible light and reflectively diffract infrared light in a first wavelength range for eye tracking; and', 'a refractive index modulation of the reflective holographic grating is apodized in a direction along a thickness of the reflective holographic grating to reduce optical artifacts in the visible light., 'a reflective holographic grating conformally coupled to a surface of the substrate, wherein2. The eye-tracking system of claim 1 , wherein a magnitude of the refractive index modulation of the reflective holographic grating is characterized by a bell-shaped curve in the direction along the thickness of the reflective holographic grating.3. The eye-tracking system of claim 2 , wherein the refractive index modulation of the reflective holographic grating has a maximum magnitude in a center region of the reflective holographic grating in the direction along the thickness of the reflective holographic grating.4. The eye-tracking system of claim 3 , wherein the thickness of the reflective holographic grating is at least 15 μm and the maximum magnitude of the refractive index modulation is at least 0.035.5. The eye-tracking system of claim 1 , wherein the refractive index modulation of ...

OFF-AXIS OPTICAL SYSTEM HAVING NON-CIRCULAR APERTURE STOP

An off-axis optical system having a rectangular aperture stop to control rays of incident electromagnetic radiation passing through the optical system along an optical path is provided. The optical system includes one or more optical surfaces along the optical path, each surface being configured to change a direction of each ray on the surface based on a location of the ray relative to the surface. At least one of the surfaces is conjugate to and has the same shape as the rectangular aperture stop. In one embodiment, each optical surface is shaped to avoid vignetting the rays. In one embodiment, the optical system is a three-mirror anastigmat (TMA) and includes a concave primary mirror to collect and focus the electromagnetic radiation; a curved secondary mirror to reflect the electromagnetic radiation focused by the primary mirror; and a concave tertiary mirror to focus the electromagnetic radiation reflected by the secondary mirror. 1. An off-axis three-mirror anastigmat having a rectangular aperture stop to control rays of incident electromagnetic radiation passing through the three-mirror anastigmat along an optical path , the three-mirror anastigmat comprising:three or more reflective surfaces along the optical path, each surface being configured to change a direction of each ray on the surface based on a location of the ray relative to the surface, at least one of the surfaces being conjugate to and having a same shape as the rectangular aperture stop,wherein the rectangular aperture stop has a width-to-length ratio of between 0.76 and 0.84, andwherein the at least one of the surfaces comprises a concave primary mirror to collect and focus the electromagnetic radiation.2. The three-mirror anastigmat of claim 1 , wherein each reflective surface is shaped to avoid vignetting the rays.3. The three-mirror anastigmat of claim 1 , wherein the optical path is unobscured by the reflective surfaces.45-. (canceled)6. The three-mirror anastigmat of claim wherein the ...

LIGHT FIELD DISLAY, ADJUSTED PIXEL RENDERING METHOD THEREFOR, AND ADJUSTED VISION PERCEPTION SYSTEM AND METHOD USING SAME ADDRESSING ASTIGMATISM OR SIMILAR CONDITIONS

Described are various embodiments of a light field display, adjusted pixel rendering method and computer-readable medium therefor, and vision correction system and method using same addressing astigmatism or similar conditions. In one embodiment, a computer-implemented method is provided to automatically adjust user perception of an input image to be rendered on a digital display via a set of pixels thereof, wherein the digital display has an array of light field shaping elements. 1. A device operable to dynamically adjust user perception of an input image , the device comprising:an array of digital display pixels;a corresponding array of light field shaping elements (LFSEs) shaping a light field emanating from said pixels; and for each given pixel, defining a corresponding location on an adjusted image surface as a function of a direction of a given light field emanated by said given pixel given a corresponding LFSE and said designated variable optical vision parameter for a given pupil location intersected by said given light field;', 'associating an adjusted image pixel value with said given pixel given said corresponding location on said adjusted image surface; and', 'rendering each said given pixel according to said adjusted pixel value associated therewith, thereby perceptively rendering a perceptively adjusted version of the input image that at least partially accommodates said designated visual acuity accommodation., 'a hardware processor operable on pixel data for the input image to output adjusted image pixel data to be rendered via said LFSEs to dynamically adjust perception of the input image as so rendered to at least partially accommodate a designated visual acuity accommodation defined by a designated variable optical vision parameter that varies across user pupil locations, by digitally2. The device of claim 1 , wherein said hardware processor is further operable to digitally project a given ray trace between said given pixel and said given pupil ...

IMAGING LENS

An imaging lens includes a first lens having positive refractive power; a second lens; a third lens having negative refractive power; a fourth lens; a fifth lens; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens is formed in a meniscus shape near an optical axis thereof. The third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof. The sixth lens is formed in a meniscus shape near an optical axis thereof. 1. An imaging lens comprising:a first lens having positive refractive power;a second lens;a third lens having negative refractive power;a fourth lens;a fifth lens;a sixth lens; anda seventh lens, arranged in this order from an object side to an image plane side,wherein said first lens is formed in a meniscus shape near an optical axis thereof,said third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof, andsaid sixth lens is formed in a meniscus shape near an optical axis thereof.3. The imaging lens according to claim 1 , wherein said second lens has a focal length f2 and said third lens has a focal length f3 so that the following conditional expression is satisfied:{'br': None, 'i': f', 'f, '0.1<2/3<0.6.'}8. An imaging lens comprising:a first lens having positive refractive power;a second lens;a third lens;a fourth lens having positive refractive power;a fifth lens;a sixth lens; anda seventh lens, arranged in this order from an object side to an image plane side,wherein said first lens is formed in a meniscus shape near an optical axis thereof,said third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof, andsaid sixth lens is formed in a meniscus shape near an optical axis thereof.10. The imaging lens according to claim 8 , wherein said second lens has a focal length ...

IMAGING LENS

An imaging lens includes a first lens having positive refractive power; a second lens; a third lens; a fourth lens; a fifth lens having negative refractive power; a sixth lens; and a seventh lens, arranged in this order from an object side to an image plane side. The first lens is formed in a meniscus shape near an optical axis thereof. The third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof. The sixth lens is formed in a meniscus shape near an optical axis thereof. 1. An imaging lens comprising:a first lens having positive refractive power;a second lens;a third lens;a fourth lens;a fifth lens having negative refractive power;a sixth lens; anda seventh lens, arranged in this order from an object side to an image plane side,wherein said first lens is formed in a meniscus shape near an optical axis thereof,said third lens is formed in a meniscus shape so that a surface thereof directing to the object side is convex near an optical axis thereof, andsaid sixth lens is formed in a meniscus shape near an optical axis thereof.3. The imaging lens according to claim 1 , wherein said second lens has a focal length f2 and said third lens has a focal length f3 so that the following conditional expression is satisfied:{'br': None, 'i': >f', '/f, '0.123<0.6.'}8. An imaging lens comprising:a first lens having positive refractive power;a second lens;a third lens;a fourth lens;a fifth lens;a sixth lens; anda seventh lens having negative refractive power, arranged in this order from an object side to an image plane side,wherein said seventh lens is formed in a meniscus shape near an optical axis thereof, and {'br': None, 'vd3<35'}, "said third lens has an Abbe's number vd3 so that the following conditional expression is satisfied:"}10. The imaging lens according to claim 8 , wherein said second lens has a focal length f2 and said third lens has a focal length f3 so that the following conditional ...