ВАРИООБЪЕКТИВ, ОПТИЧЕСКОЕ УСТРОЙСТВО И СПОСОБ ИЗГОТОВЛЕНИЯ ВАРИООБЪЕКТИВА

Вариообъектив содержит первую, третью и четвертую положительные линзовые группы и вторую отрицательную линзовую группу. Первая, вторая и третья линзовые группы при масштабировании изображения перемещаются вдоль оптической оси и удовлетворяются выражения: 8,00<β2T/β2W<12,00, 2,00<β3T/β3W<5,00, где β2T и β3T - поперечное увеличение второй и третьей линзовых групп в конечном состоянии телеобъектива, β2W и β3W - поперечное увеличение второй и третьей линзовых групп в конечном состоянии широкоугольного объектива. Первая линзовая группа включает по порядку от предмета отрицательную и положительную линзы и удовлетворяется выражение: 0,00<(-f1c)/f1<250,00, где f1c - составное фокусное расстояние указанных отрицательной и положительной линз, f1 - фокусное расстояние первой линзовой группы. Технический результат - повышение коэффициента масштабирования при небольшом размере, высоком качестве изображения и большом увеличении. 5 н. и 6 з.п. ф-лы, 24 ил., 4 табл.

Объектив

Объектив может использоваться для формирования изображения на приемниках изображения, в том числе на ПЗС и КМОП матрицах. Объектив содержит четыре компонента. Первый компонент - положительный, второй - тройная склейка, включающая две отрицательные линзы и одну двояковыпуклую между ними, третий - положительный и склеен из положительного и отрицательного менисков и обращен выпуклой поверхностью к пространству изображений, четвертый - одиночный отрицательный мениск, обращенный вогнутой поверхностью к пространству изображений. Апертурная диафрагма расположена между первым и вторым компонентами. Выполняются соотношения, указанные в формуле полезной модели. Технический результат - обеспечение стабильности оптических характеристик и высокое качество изображения в широком температурном диапазоне без использования редких оптических материалов и марок стекла. 1 ил., 3 табл.

Четырехлинзовый апохроматический объектив

Объектив может быть использован в телескопических системах различного назначения, в том числе в астрономических телескопах для визуального наблюдения. Четырехлинзовый апохроматический объектив содержит два оптически связанных компонента, разделенных воздушным промежутком d. Первый компонент содержит две линзы: отрицательный мениск и двояковыпуклую линзу, выполненные из стекол марки X и Y соответственно и разделенные воздушным промежутком d, второй - двояковогнутую линзу, выполненную из стекла марки X и двояковыпуклую линзу, выполненную из стекла марки Y, разделенные воздушным промежутком d. Показатели преломления и числа Аббе стекол X и Y такие, что:1,6≤n≤1,8 и 49≤ν≤55;1,5≤n≤1,7 и 51≤ν≤66,а воздушные промежутки такие,что:d≤0,004f;d≤d, d≤d,гдеn- показатель преломления стекла марки X;n- показатель преломления стекла марки Y;ν- число Аббе стекла марки X;ν- число Аббе стекла марки Y;f - фокусное расстояние объектива.Технический результат - создание апохроматического объектива простой и компактной ...

СВЕТОСИЛЬНЫЙ ОБЪЕКТИВ ДЛЯ ИНФРАКРАСНОЙ ОБЛАСТИ СПЕКТРА

Объектив может быть использован в тепловизионных приборах. Объектив содержит четыре мениска, первый из которых - положительный мениск, обращенный вогнутостью к изображению, второй – отрицательный мениск, обращенный выпуклостью к изображению, третий - положительный мениск, обращенный выпуклостью к изображению, четвертый - положительный мениск, обращенный выпуклостью к предмету.Радиусы кривизны поверхностей линз и расстояния между линзами удовлетворяют условиям:где dd- расстояния между первой и второй и второй и третьей линзами соответственно; R÷R- радиусы кривизны линз, пронумерованные по ходу луча; f' - эквивалентное фокусное расстояние всего объектива. Технический результат - увеличение относительного отверстия и углового поля зрения при обеспечении высокого качества изображения по всему полю. 4 ил., 1 прилож.

Объектив светосильный инфракрасный

Изобретение относится к области оптического приборостроения, а именно к специальным объективам, работающим в ИК-диапазоне длин волн. Объектив светосильный инфракрасный, содержит четыре компонента, из которых первый, третий и четвертый - положительные мениски, обращенные вогнутыми поверхностями к плоскости изображения, второй компонент - отрицательный мениск, обращенный выпуклой поверхностью к плоскости изображения. Первый, третий и четвертый компоненты выполнены из германия, т.е. выполняются соотношения n1=n3=n4, v1=v3=v4, где n и v - показатели преломления и коэффициенты дисперсии компонентов соответственно, второй компонент выполнен из селенида цинка. При этом относительные оптические силы компонентов и воздушные промежутки удовлетворяют следующим условиям: Ф1=(0,42÷0,47) Ф, Ф2=- (0,066÷0,076) Ф, Ф3=(0,25÷0,27) Ф, Ф4=(1,16÷1,34) Ф, d2=(0,37÷0,44)/Ф, d4=(0,39÷0,44)/Ф, d6=(0,39÷0,44)/Ф, где: Ф1, Ф2, Ф3, Ф4 - оптические силы соответственно первого, второго, третьего и четвертого компонентов ...

ЧЕТЫРЁХЛИНЗОВЫЙ ОБЪЕКТИВ

Изобретение относится к оптическому приборостроению. Объектив состоит из апертурной диафрагмы и двух двухлинзовых компонентов, разделенных воздушным промежутком. Первая линза объектива - отрицательный мениск, обращенный вогнутостью к предмету, вторая - двояковыпуклая, третья - отрицательный мениск, обращенный вогнутостью к изображению, четвертая - выпукло-плоская, обращенная плоскостью к изображению. Линзы внутри первого и второго компонента разделены осободисперсными жидкими средами (ОЖС): в первом компоненте - средой, отвечающей условиям 1,404≤nd≤1,417, 53≤vd≤56, а во втором компоненте - средой, отвечающей условиям 1,310≤nd≤1,330, 80≤vd≤83. Технический результат изобретения - повышение относительного отверстия и улучшение технологичности. 3 ил.

ОБЪЕКТИВ ДЛЯ ИК-ОБЛАСТИ СПЕКТРА

Объектив может быть использован в тепловизорах, чувствительных в спектральном диапазоне от 8 до 12 мкм. Объектив содержит четыре мениска, из которых первый, второй и четвертый по ходу луча мениски - положительные, третий - отрицательный. Все мениски обращены вогнутыми поверхностями к плоскости изображений. Первый и четвертый мениски выполнены из германия, а второй и третий - из селенида цинка. Третий мениск выполнен подвижным вдоль оптической оси. Выполняются следующие соотношения: φ:φ:φ:φ=(0,75÷0,83):(0,3÷0,64):-(0,69÷1,5):(1,30÷1,77), где φ, φ, φ, φ- относительные оптические силы соответственно первого, второго, третьего и четвертого менисков; D2/f′=0,18÷0,42; D6/f=0,34÷0,60, где D2 - воздушный промежуток между первым и вторым менисками, f′ - эквивалентное фокусное расстояние объектива; D6 - воздушный промежуток между третьим и четвертым менисками. Технический результат - повышение относительного отверстия объектива при сохранении высокого контраста изображения и обеспечение неизменности ...

СВЕТОСИЛЬНЫЙ ОБЪЕКТИВ

Объектив может быть использован в различных оптических системах, в частности работающих с телевизионной ПЗС-матрицей. Светосильный объектив содержит четыре компонента. Первый компонент - одиночная двояковыпуклая линза. Второй компонент – одиночный положительный мениск, обращенный выпуклостью к предмету. Третий компонент - одиночная плосковогнутая линза. Четвертый компонент - склеенная положительная линза, состоящая по ходу лучей из двояковыпуклой линзы и отрицательного мениска, обращенного вогнутостью к предмету. Показатели преломления и коэффициенты дисперсии материалов линз связаны соотношениями, приведенными в формуле изобретения. Технический результат - увеличение углового поля в пространстве предметов при высоком качестве изображения. 1 ил., 4 табл.

Широкоугольный светосильный инфракрасный объектив

Объектив может быть использован в тепловизорах, чувствительных в спектральном диапазоне от 8 до 12 мкм. Объектив содержит четыре компонента, из которых первый и второй по ходу луча - положительные мениски, обращенные вогнутыми поверхностями к плоскости изображений, а третий - отрицательный мениск, обращенный вогнутой поверхностью к плоскости изображений. Четвертый - положительный мениск, обращенный вогнутой поверхностью к плоскости изображений, или выпукло-плоская линза. Первый и четвертый компоненты выполнены из германия, второй - из халькогенидного стекла IRG-26, третий - из халькогенидного стекла IRG-25. Вторые по ходу луча поверхности первого и второго компонентов выполнены асферическими, конические постоянные которых лежат в пределах: К2=4,2÷15,0; К4=2,6÷4,8, где: К2, К4 - конические постоянные асферических поверхностей соответственно первого и второго компонентов. Выполняются соотношения: 3,57f' Подробнее

ВАРИООБЪЕКТИВ, ОПТИЧЕСКОЕ УСТРОЙСТВО И СПОСОБ ИЗГОТОВЛЕНИЯ ВАРИООБЪЕКТИВА

... 1. Вариообъектив, содержащий, по порядку от предмета:первую линзовую группу, имеющую положительную преломляющую силу;вторую линзовую группу, имеющую отрицательную преломляющую силу;третью линзовую группу, имеющую положительную преломляющую силу; ичетвертую линзовую группу, имеющую положительную преломляющую силу,при этом первая линзовая группа, вторая линзовая группа и третья линзовая группа при масштабировании изображения перемещаются вдоль оптической оси и удовлетворяются следующие условные выражения:8,000<β2T/β2W<12,000,2,000<β3T/β3W<5,000,где β2Τ обозначает поперечное увеличение второй линзовой группы в конечном состоянии телеобъектива;β2W обозначает поперечное увеличение второй линзовой группы в конечном состоянии широкоугольного объектива;β3Τ обозначает поперечное увеличение третьей линзовой группы в конечном состоянии телеобъектива; иβ3W обозначает поперечное увеличение третьей линзовой группы в конечном состоянии широкоугольного объектива.2. Вариообъектив по п. 1, в котором удовлетворяется ...

Photographisches Objektiv fuer Aufnahme oder Bildwurf

PROJECTION LENS SYSTEM

PHOTO-OBJEKTIV

Kompaktes Objektiv

Es wird ein Objektiv, insbesondere für eine spiegellose Systemkamera, bereitgestellt, wobei das Objektiv (1) eine erste Linse (7) mit positiver Brechkraft, eine zweite Linse (8) mit negativer Brechkraft, eine dritte Linse (9) mit positiver Brechkraft und eine vierte Linse (10) mit negativer Brechkraft aufweist,wobei die Linsen (7-10) in der genannten Reihenfolge ausgehend von der Objektseite entlang einer optischen Achse (OA) des Objektivs (1) hintereinander angeordnet sind,wobei die erste und zweite Linse (7, 8) eine erste Optikgruppe (11) mit positiver Brechkraft sowie die dritte und vierte Linse (9, 10) eine zweite Optikgruppe (12) mit positiver Brechkraft bilden,wobei zwischen der zweiten und dritten Linse (8, 9) eine erste Blende (13) angeordnet ist unddie Optikgruppen (11, 12) unabhängig voneinander, mindestens eine der Linsen (7-10) unabhängig von den anderen Linsen (7-10) und/oder die erste Blende (13) unabhängig von den anderen Linsen (7-10) entlang der optischen Achse (OA) verschiebbar ...

Photographic objective

Anastigmatic objective

... 727,710. Optical objectives. ZEISS-OPTON OPTISCHE WERKE OBERKOCHEN GES. Aug. 4, 1953 [Aug. 16, 1952], No. 21436/53. Class 97 (1). In an objective comprising two negative meniscii concave to a central airspace between then and enclosed between two positive meniscii also concave to the airspace, the latter being greater than 4/ 5 of the arithmetic mean of the radii of curvature of the surfaces bounding it, each positive component consists of an outer positive element of lesser dispersion and higher refractive index than the negative element to which it is cemented. Numerical data are given for one example of the objective shown. Specification 423,156 is referred to.

Infrared laser light source spreader

IMPROVEMENTS IN AND RELATING TO OPTICAL SYSTEMS

... 1,271,918. Lens systems. COMPAGNIE GENERALE D'ELECTRICITE. July 23, 1970 [July 28, 1969], No.35788/70. Heading G2J. A lens system comprises a first group of lenses including at least one converging lens and at least one diverging lens, and a second lens group including a concave-convex lens arranged with its aplanatic object point coinciding with the image of a point object at infinity given by the first group, the successive lenses being separated by a non- zero distance which is small in relation to the smallest focal length of the lenses. As shown, the first group 1 comprises two converging lenses 4 and 5, and diverging lens 6, and the second group 2 is the single lens 7. The system may comprise, in the second group, at least two concave-convex lenses, the first being arranged with its aplanatic object point coinciding with the image of a point object at infinity formed by the first group, and the or each subsequent concave-convex lens having its aplanatic object point coincident with ...

Photographic lens

WIDE ANGLE LENS

THREE DIMENSIONAL REFLEX LENS SYSTEMS

Automatic focusing lens assembly in a camera

IMPROVEMENTS IN OR RELATING TO LENSES

Infrared laser light source spreader

Improvements in or relating to optical objectives

... 608,661. Optical objectives. KODAK, Ltd. Jan. 29, 1945, No. 18073/47. Convention date, Nov. 20, 1943. Divided out of 608,583. Drawings to Specification. [Class 97 (i)] In an objective consisting of two collective members separated by a central airspace, each member comprising a thick meniscus compound component strongly concave towards the central airspace and at least one positive component on the convex side of each meniscus, the average value of the ratio R/(Nl - 1) for the two surfaces bounding the central airspace exceeds the axial length of such airspace by less than F/6, where R is the radius of curvature and N<1> the refractive index of the glass at the surface and F is the focal length of the objective. Data for four examples are given including one in which negative lenses are placed before and behind the objective to change the stop position. Specifications 608,583 and 608,586 are referred to.

Improvements in four-lens photo-objectives

... 496,865. Lenses. ZEISS, C., [Firm of]. May 21, 1938, No. 15181. Convention date, May 31, 1937. [Class 97 (i)] A photographic objective consisting of four simple lenses, the third lens from the object being divergent and the other lenses convergent, in which the front surfaces of the first and second lenses and the rear surface of the fourth lens are convex, in which each of these surfaces is curved more strongly than the other surface of the same lens, in which the rear surface of the third lens is curved more strongly than the front surface of this lens, and in which the axial distance apart of the third and fourth lenses is greater than the distance apart of the second and third, is characterized by the feature that the front surface of the first lens has a radius of curvature greater than 55 per cent of the focal length of the objective, that the axial thickness of the second lens is greater than 12 per cent of the focal length of the objective, that the third lens is of glass having ...

LENS SYSTEM HAVING LARGE RELATIVE APERTURE AND LONG FOCUS

... 1485178 Lenses NIPPON KOGAKU KK 4 Oct 1974 [5 Oct 1973] 43224/74 Heading G2J A lens of large relative aperture, e.g. 1:2À8, and long focus, e.g. having an angle of view of 18À1 degrees, but short total length comprises in order a positive group L1 having one outer surface, of smaller radius of curvature than the other, facing the object side; a positive meniscus group L2 convex to the object; a negative group L3 and a positive group L4. The ratio of the sum of the spacings and thicknesses d 1 -d 6 to the sum of all the spacings and thicknesses d 1 -d 8 is from 0À4 to 0À53. The third group L3 comprises a positive lens and a negative lens joined together and satisfying these conditions:- having their usual meanings. Data are given for three examples.

FOUR COMPONENT SIX ELEMENT LENS SYSTEM

Improved high aperture photographic objectives

... 535,501. Photographic objectives. KODAK, Ltd. March 21, 1940, No. 5284. Convention date, June 8, 1939. [Class 97 (i)] A photographic objective comprises, behind the diaphragm, a compound component having two oppositely-curved cemented surfaces R 9 , R 10 , and, in front of the diaphragm, a collective first component, a compound collective second component having a cemented surface R 4 convex to the incident light, and a third bi-concave component forming a biconvex air lens with the second component. The rearmost component may be bi-convex having a bi-concave or bi-convex middle element, the first and second components may be meniscus, and the third component may be compound, the glasses having substantially the same refractive index but different dispersions. The rearmost component may have a bi-concave middle element of low refractive index, a rear element of high refractive index, e.g. greater than 1.7, and a front element of an intermediate refractive index. Limits for surface radii ...

Variable focus lens

OBJECTIVELY

PROJEKTIONSOBJEKTIV

PROJECTION OBJECTIVE

COMPACT OBJECTIVE WITH FOUR EINZELLINSEN

OBJECTIVELY LARGE APERTURE.

Photographic or kinematographisches objective

WIDE APERTURE OBJECTIVE LENS

Variable focus lens

PROJECTION LENS SYSTEM

WIDE APERTURE OBJECTIVE LENS

SPLIT DAGOR - TYPE OF SYMMETRICAL COPYING LENS SYSTEM

OBJECTIF GRAND ANGULAIRE

PROJECTION-LENS SYSTEM

VARIABLE FOCUS LENS

Sphärisch, astigmatisch und komatisch für eine oder mehrere Farben korrigiertes photographisches Objektiv.

Gauss-Doppelobjektiv, bestehend aus vier meniskenförmigen, in Luft stehenden Gliedern

Photographisches Objektiv mit zwei zwischen zwei sammelnden Gliedern liegenden, zerstreuenden Menisken

Photographisches Objektiv

Objektiv.

Aus vier Gliedern bestehendes photographisches Objektiv grosser Lichtstärke.

Objektiv.

Weitwinkelobjektiv für Vergrösserungszwecke

Sphärisch, chromatisch, komatisch, astigmatisch und auf Bildfeldwölbung korrigiertes Weitwinkelobjektiv

Anastigmatisches Objektiv

Photographisches Objektiv

Lichtstarkes viergliedriges Gauss-Objektiv mit grossem Gesichtsfeld

Photographisches Objektiv

Photographisches Objektiv

Viergliedriges Gauss-Objektiv mit grossem Bildwinkel

Vergrösserungs-Weitwinkelobjektiv

Photographisches Objektiv

Photographisches Objektiv

Lichtstarkes objektiv aus mindestens vier in Luft stehenden Gliedern vom erweiterten Triplet-typus

Photographisches oder kinematographisches Objektiv

Fünflinsiges Objektiv

Symmetrisches Objektiv vom Gauss-Typ für Kopierzwecke

OBJECTIF DU TYPE GRAND ANGULAIRE.

Objektiv für photographische Aufnahme und Projektion, bestehend aus vier freistehenden Einzellinsen

Lichtstarkes photographisches oder kinematographisches Objektiv

Optisches Linsensystem mit einer relativen Apertur von mehr als 1/0,75

Photographisches Objektiv

Lichtstarkes Gauss-Doppelobjektiv

Sphärisch, chromatisch, komatisch, astigmatisch und auf Bildfeldebnung korrigiertes Weitwinkelobjektiv

Lichtstarkes, chromatisch, sphärisch, astigmatisch und komatisch korrigiertes photographisches Objektiv

Aus wenigstens vier Linsengliedern bestehendes Objektiv

AFOCAL OPTICAL DEVICE.

Image taking optical system and image pickup apparatus equipped with same

Adjustable variable light quantity optical imaging system and imaging system

Very luminous objective

EXPANDED TRIPLET OBJECTIVE HAVING AT LEAST FOUR ELEMENTS

WIDE ANGLE OBJECTIVE SYSTEM

Objective doubles gauss with strong luminosity

Large-aperture lens for recording images

Modified Petzval lens with aperture greater than f 1.2 - has positive doublets, positive meniscus lens and divergent lens (NL 25.7.77)

줌 렌즈 및 이를 구비한 촬상 장치

... 줌 렌즈 및 이를 구비한 촬상 장치가 개시된다. 개시된 줌 렌즈는 물체측으로부터 순서대로, 정의 굴절력을 가지는 제1렌즈군, 부의 굴절력을 가지는 제2렌즈군, 정의 굴절력을 가지는 제3렌즈군, 정의 굴절력을 가지는 제4렌즈군을 포함하고, 상기 제2렌즈군은 저굴절률의 소재를 이용한 렌즈를 포함한다.

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.

IMAGE PICK-UP LENS

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 ...

MICRO IMAGE PICKUP OPTICAL SYSTEM FOR MAINTAINING AN F NUMBER OVER 3.0 AND A WIDE VIEW ANGLE OVER 62 DEGREES

PURPOSE: A micro image pickup optical system is provided to reduce chromatic aberrations by using first and second lenses with big difference in refractive indexes and abbe numbers and to implement a microminiature structure by relatively increasing power of the first and second lenses. CONSTITUTION: A micro image pickup optical system is composed of a first lens(L1) having the positive refractive power and both convex surfaces; a second meniscus lens(L2) having the negative refractive power and convex toward an object; a third meniscus lens(L3) having the positive refractive power and convex toward an image; and a fourth lens(L4) having the negative refractive power. The dimension of an optical axial direction of the micro image pickup optical system satisfies the following formula 1, 1.2 Подробнее

Mobile device and optical imaging lens thereof

The present invention provides a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop, first, second, third and fourth lens elements positioned sequentially from an object side to an image side. The first lens element has a shaped surface facing toward the object side and a positive refractive power. The second lens element has a negative refractive power and has a convex surface facing toward the object side and a shaped surface facing toward the image side. The third lens element has a positive refractive power. The fourth lens element has a shaped surface facing toward the object side and a shaped surface facing toward the image side. The shaped surface has a concave portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of the fourth lens. Above all, the present invention is capable of shortening the total length of the optical imaging lens efficiently and showing better optical characteristics.

Projection lens, projection device and optically-induced microparticle device

A projection lens, a projection device and a optically-induced micro-particle device are provided. The projection lens includes an aperture, a first and a second lens groups. The aperture, the first and the second lens groups are disposed on a projection path of an object image. The aperture is between the first and the second lens groups. The first and the second lens groups are suitable for switching with each other to change the magnification. When at a first state, the first lens group is between the object and the aperture and the second lens group is between the aperture and a projection surface, herein the projection lens has a first magnification. When at a second state, the first lens group is between the aperture and the projection surface, and the second lens group is between the object and the aperture, herein the projection lens has a second magnification.

Optical image capturing system

The invention discloses a four-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; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Optical imaging lens and electronic device comprising the same

An optical imaging lens includes: an aperture stop, a first, second, third and fourth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens, each of said first lens element, said second lens element, said third lens element, and said fourth lens element have an object-side surface facing toward the object side and an image-side surface facing toward the image side. Said image-side surface of said first lens element has a convex part in a vicinity of its periphery, said object-side surface of said second lens element has a concave portion in a vicinity of the optical axis, said object-side of said third lens element has a concave portion in a vicinity of the optical axis, and a convex part in a vicinity of its periphery; said object-side surface of said fourth lens element has a convex portion in a vicinity of the optical axis, wherein the optical imaging lens set does not include any lens element with refractive power other than said ...

Action carrier auxiliary system and vehicle electronic rearview mirror

The utility model discloses a mobile carrier auxiliary system and an electronic rearview mirror for a vehicle. The mobile carrier auxiliary system comprises a first light-transmitting element, a second light-transmitting element, an electro-optic dielectric layer, a light-transmitting electrode, a reflecting layer, a transparent conducting layer, an electric connecting piece, a control element andan optical imaging system. A gap can be formed between the second light-transmitting element and the first light-transmitting element. Wherein the electro-optic dielectric layer is arranged in a gapformed by the first light-transmitting element and the second light-transmitting element, the light-transmitting electrode can be arranged between the first light-transmitting element and the electro-optic dielectric layer, and the electro-optic dielectric layer is arranged between the first light-transmitting element and the reflecting layer; the transparent conducting layer is arranged between the ...

Photographing optical system

OPTICAL IMAGING LENS AND ELECTRONIC DEVICE COMPRISING THE SAME

Imaging lens assembly, image capturing device and electronic device

Широкоугольный объектив с телецентрическим ходом лучей в пространстве изображения

Широкоугольный объектив с телецентрическим ходом лучей в пространстве изображения, содержащий последовательно установленные четыре линзы, из которых первая и вторая выполнены в виде менисков, обращенных выпуклостями к плоскости изображения, третья выполнена двояковыпуклой, а четвертая - в виде мениска, обращенного вогнутостью к плоскости изображения, отличающийся тем, что первая линза выполнена в виде одиночного мениска с отрицательной оптической силой, а четвертая линза выполнена в виде одиночного мениска с положительной оптической силой, при этом оптические силы линз удовлетворяют условию:0.2≤|φ/φ|≤0.30.1≤φ/φ≤0.20.3≤φ/φ=φ/φ≤0.5,где φ, φ, φ, φ- оптические силы первой, второй, третьей и четвертой линз соответственно, φ - эквивалентная оптическая сила объектива в целом, кроме того, первая и четвертая линзы выполнены из материала с показателями преломления n≥1.8, а вторая и третья линзы выполнены из материала с показателями преломления n<n. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 160 480 U1 (51) МПК G02B 13/22 (2006.01) G02B 9/34 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2015147689/28, 05.11.2015 (24) Дата начала отсчета срока действия патента: 05.11.2015 (45) Опубликовано: 20.03.2016 Бюл. № 8 (73) Патентообладатель(и): Акционерное общество "ЛОМО" (RU) 1 6 0 4 8 0 R U (57) Формула полезной модели Широкоугольный объектив с телецентрическим ходом лучей в пространстве изображения, содержащий последовательно установленные четыре линзы, из которых первая и вторая выполнены в виде менисков, обращенных выпуклостями к плоскости изображения, третья выполнена двояковыпуклой, а четвертая - в виде мениска, обращенного вогнутостью к плоскости изображения, отличающийся тем, что первая линза выполнена в виде одиночного мениска с отрицательной оптической силой, а четвертая линза выполнена в виде одиночного мениска с положительной оптической силой, при этом оптические силы линз удовлетворяют ...

Объектив

Объектив содержит силовой компонент, включающий положительную двусклеенную линзу из двояковыпуклой линзы и отрицательного мениска, одиночную двояковыпуклую линзу, отрицательную двусклеенную линзу из двояковогнутой линзы и положительного мениска, и коррекционный компонент в виде отрицательного мениска, склеенного из двояковогнутой и двояковыпуклой линз. Между силовым и коррекционным компонентами установлен спектроделительный блок, пропускающий излучение в диапазоне 500-900 нм и отражающий излучение длиной волны (1030±30) нм или (1540±30) нм. Расстояние между силовым и коррекционным компонентами составляет не менее 0,4 фокусного расстояния объектива, а сумма их оптических сил не превышает 0,002 по абсолютной величине. Расстояние между одиночной двояковыпуклой линзой силового компонента и его отрицательной двусклеенной линзой отвечает условию:0,04f'<d<0,05f', где f'- фокусное расстояние силового компонента. Технический результат - увеличение поля зрения и фокусного расстояния и повышение качества изображений при длине объектива от его первой поверхности до плоскости изображений не более фокусного расстояния объектива. 3 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 170 801 U1 (51) МПК G02B 9/34 (2006.01) G02B 13/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ФОРМУЛА ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21)(22) Заявка: 2016146674, 28.11.2016 (24) Дата начала отсчета срока действия патента: 28.11.2016 11.05.2017 (73) Патентообладатель(и): Открытое акционерное общество "Пеленг" (BY) Приоритет(ы): (30) Конвенционный приоритет: 11.12.2015 BY u20150425 Адрес для переписки: 220114, Рес. Беларусь, г. Минск, ул. Макаенка, 25, ОАО "Пеленг" U1, 10.07.2014. RU 81345 U1, 10.03.2009. RU 77457 U1, 20.10.2008. US 6339508 B1, 15.01.2002. 1 7 0 8 0 1 R U (57) Формула полезной модели Объектив, содержащий установленные по ходу луча силовой и коррекционный компоненты, при этом силовой компонент включает положительную двусклеенную линзу, ...

Светосильный инфракрасный объектив

Объектив может быть использован в тепловизионных приборах, приемники которых чувствительны в инфракрасной области спектра, в частности в диапазоне спектра 8-14 мкм. Объектив содержит четыре мениска, первый - положительный мениск, обращенный вогнутостью к изображению, второй - положительный мениск, обращенный выпуклостью к изображению, третий - отрицательный мениск, обращенный выпуклостью к изображению, четвертый - положительный мениск, обращенный выпуклостью к объекту. Радиусы кривизны R поверхностей линз и расстояния d между линзами удовлетворяют условиям: 0,76≤(R/R)≤0,8; 0,87≤(R/R=R/R)≤0,94; 0,3f'≤d/f'≤0,43f'; 0,93f'≤(d+d+d)≤lf', где d, d, d- расстояния между первой и второй, второй и третьей, третьей и четвертой линзами соответственно, f' - фокусное расстояние объектива в целом. Технический результат - увеличение относительного отверстия до 1:0,9 при обеспечении требуемого качества изображения по всему полю. 1 з.п. ф-лы, 4 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 192 401 U1 (51) МПК G02B 13/14 (2006.01) G02B 9/34 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G02B 13/14 (2019.05); G02B 9/34 (2019.05) (21)(22) Заявка: 2019113244, 29.04.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 16.09.2019 (73) Патентообладатель(и): Акционерное общество "ЛОМО" (RU) (45) Опубликовано: 16.09.2019 Бюл. № 26 (56) Список документов, цитированных в отчете о поиске: SU 1714562 A1, 23.02.1992. RU 2506616 C1, 10.02.2014. RU 2348059 C1, 27.02.2009. RU 2630194 C1, 05.09.2017. US 4030805 A1, 21.06.1977. 1 9 2 4 0 1 R U (54) СВЕТОСИЛЬНЫЙ ИНФРАКРАСНЫЙ ОБЪЕКТИВ (57) Реферат: Объектив может быть использован в выпуклостью к объекту. Радиусы кривизны R тепловизионных приборах, приемники которых поверхностей линз и расстояния d между линзами чувствительны в инфракрасной области спектра, удовлетворяют условиям: 0,76≤(R1/R2)≤0,8; в частности в диапазоне спектра 8-14 мкм. 0,87≤(R3/R4= ...

Image pickup lens and image pickup device using the same

An image pickup lens capable of providing an angle of view of up to 70° or higher is provided. The image pickup lens can also be reduced in size and various aberrations associated with the lens can be corrected favorably, so that the image pickup lens is compatible with a high-pixel image pickup element. The image pickup lens 7 includes, in order from an object side to an image surface side: a first lens 1 that is a biconvex lens having positive power; a second lens 2 that has negative power and whose lens surface facing the image surface side is concave; a third lens 3 that is a meniscus lens having positive power and whose lens surface facing the image surface side is convex; and a fourth lens 4 that has negative power, whose lens surfaces are both aspherical and whose lens surface facing the image surface side is concave near an optical axis. The image pickup lens 7 satisfies the following conditional expressions (1) and (2), where f is the focal length of the overall optical system, Y′ is the maximum image height, and TL is the overall length of the optical system: 1.20< f/Y′ <1.35  (1) TL/Y′ <2.0  (2).

Image Pickup Lens, Image Pickup Device Having Image Pickup Lens, And Portable Terminal Having Image Pickup Device

An image pickup lens comprises a first lens (L 1 ) having a positive refractive power, an aperture stop (s 3 ), a second lens (L 2 ) having a negative refractive power and having a concave surface facing the image side, a third lens (L 3 ) having a positive refractive power, and a fourth lens (L 4 ) having a negative refractive power and having a concave surface facing the image side. The image pickup lens satisfies predetermined formulae.

Optical imaging lens assembly

An optical imaging lens assembly comprises, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. There is a stop disposed between the first lens element and the third lens element. The first lens element has negative refractive power, the second lens element has positive refractive power, the third lens element has negative refractive power, and the fourth lens element has positive refractive power. The first lens element has a convex object-side surface and a concave image-side surface. The third lens element and the fourth lens element both have at least one of its object-side surface and its image-side surface being aspheric. With the aforementioned arrangement, the optical imaging lens assembly of the present invention can obtain a larger viewing angle, lower sensitivity and higher resolution.

Image pickup lens

An image pickup lens includes, in sequence from an object side to an image side, an aperture stop; a first lens having two convex surfaces and having a positive refractive power; a second lens in a meniscus shape whose convex surface faces to the object side having a negative refractive power; a third lens in a meniscus shape with the convex surface facing to the image side having a positive refractive power; a fourth lens in a meniscus shape with the convex surface facing to the object side having a negative refractive power. Predefined conditions are satisfied.

Image pickup lens, image pickup device using same, and portable device equipped with image pickup device

An image pickup lens compatible with small high-pixel image pickup elements (e.g., from CCD and CMOS image sensors having a pixel pitch of 1.75 μm and a pixel count of 5 mega pixels to CCD and CMOS image sensors having a pixel pitch of 1.4 μm and a pixel count of 8 mega pixels) is provided. An image pickup lens 7 includes, in order from an object side to an image surface side: an aperture stop 5 , a first lens 1 having positive power; a second lens 2 that is a meniscus lens having negative power and whose lens surface facing the image surface side is concave; a third lens 3 that is a meniscus lens having positive power and whose lens surface facing the image surface side is convex; and a fourth lens 4 that has negative power, whose lens surfaces are both aspherical and whose lens surface facing the image surface side is concave near the optical axis. A diffractive optical element is formed on one of the lens surfaces of the first lens 1 or the second lens 2.

Image capturing optical lens assembly

An image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface, a second lens element with negative refractive power, a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, and a fourth lens element with refractive power having a concave image-side surface. The object-side surface and the image-side surface of the fourth lens element are aspheric. Either or both of the object-side surface and the image-side surface have at least one inflection point formed thereon.

Zoom lens system, interchangeable lens apparatus and camera system

A zoom lens system comprising a negative first lens unit, a positive second lens unit, a negative third lens unit, and a positive fourth lens unit, wherein the first lens unit and the third lens unit move along an optical axis, and the fourth lens unit is fixed with respect to an image surface in zooming, the third lens unit moves along the optical axis in focusing, and the conditions: 0.0<|M 3 /f W |<0.5 and 0.2<|f 3 /f 4 |<1.0 (M 3 : an amount of movement of the third lens unit in zooming, f 3 : a composite focal length of the third lens unit, f 4 : a composite focal length of the fourth lens unit, f W : a focal length of the entire system at a wide-angle limit) are satisfied.

IMAGING LENS AND IMAGING APPARATUS

An imaging lens, including in order from an object side to an image side, an aperture stop, a first lens formed in a biconvex shape having a positive refractive power, a second lens having a negative refractive power with a surface on the image side formed to be a concave surface, a third lens having a positive refractive power with a convex surface faced to the image side, and a fourth lens having a negative refractive power with a surface on the image side formed to be a concave surface. 1. An imaging lens , comprising: in order from an object side to an image side ,an aperture stop;a first lens formed in a biconvex shape having a positive refractive power;a second lens having a negative refractive power and a surface on the image side formed to be a concave surface;a third lens formed in a meniscus shape having a positive refractive power with a convex surface faced to the image side; and [{'br': None, 'i': R', '+R', 'R', '−R, '0≦(21)/(21)≦1\u2003\u2003(1)'}, {'br': None, 'i': 'R', '3≦0\u2003\u2003(2)'}, {'br': None, 'i': Подробнее

IMAGE PICKUP LENS

An image pickup lens having a relatively wide angle of field with various aberrations preferably corrected and having a small F-value is achieved. The image pickup lens is composed of, in order from an object side, an aperture stop, a first lens of a biconvex shape having a refractive power, a second lens of a meniscus shape having a negative refractive power with a concave surface facing the object side near the optical axis, a third lens of a meniscus shape having a positive refractive power with a concave surface facing the object side near the optical axis, and a fourth lens of a biconcave shape having a negative refractive power near the optical axis, wherein the image pickup lens satisfies a following conditional expression (1): 1. An image pickup lens comprising , in order from an object side to an image plane side:an aperture stop;a first lens of a biconvex shape having a positive refractive power with convex surfaces facing both the object side and the image side near an optical axis;a second lens of a meniscus shape having a negative refractive power with a concave surface facing the object side near the optical axis;a third lens of a meniscus shape having a positive refractive power with a concave surface facing the object side near the optical axis; anda fourth lens of a biconcave shape having a negative refractive power with concave surfaces facing both the object side and the image side near the optical axis; {'br': None, 'i': Подробнее

WIDE-ANGLE PROJECTION LENS FOR PROJECTION DISPLAY SYSTEMS

Wide-angle projection lens, as well as optical engines and projection display devices comprising such projections lens are described. In one embodiment, a wide-angle projection lens is described comprising in sequential order from a screen side a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of positive refractive power; and a fourth lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the wide-angle projection lens (F) to the focal length of each of the lens groups (F, F, F, and F) is such that |F/F|>1.3, F/F>2, 1 Подробнее

IMAGE PICKUP APPARATUS AND LENS UNIT

A first lens unit performing communication with an image pickup apparatus with a first voltage and a second lens unit performing communication with the image pickup apparatus with a second voltage are selectively attached to the image pickup apparatus. The image pickup apparatus includes a controller configured to operate with a third voltage different from at least one of the first and second voltages to output a signal for the communication with the first and second lens units, and a determiner configured to determine the type of the lens unit attached to the image pickup apparatus. The controller is configured to produce, as a voltage of the signal for the communication, from the third voltage, one of the first and second voltages corresponding to a determination result of the determiner. 1. An image pickup apparatus to which a plurality of types of lens units are selectively attachable , the plurality of types of lens units including a first lens unit that performs communication with the image pickup apparatus with a first voltage and a second lens unit that performs communication with the image pickup apparatus with a second voltage different from the first voltage , the image pickup apparatus comprising:a controller configured to operate with a third voltage different from at least one of the first and second voltages to output a signal for the communication with the first and second lens units; anda determiner configured to determine the type of the lens unit attached to the image pickup apparatus,wherein the controller is configured to produce, as a voltage of the signal for the communication, from the third voltage, one of the first and second voltages corresponding to a determination result of the determiner.2. An image pickup apparatus according to claim 1 , wherein the image pickup apparatus further comprising a mount to mechanically couple with the lens unit and to electrically connect the image pickup apparatus with the lens unit claim 1 , andwherein ...

OCULAR LENS, OCULAR LENS WITH ADDITIONAL LENS, AND OPTICAL DEVICE

The invention provides an ocular lens well corrected for aberrations through a sufficiently large angle of view and having a sufficient eye relief while ensuring avoidance of increasing the overall length and suppression of an increase in lens diameter, and provides an optical device including this ocular lens. 8. The ocular lens according to claim 1 , wherein the first lens group includes claim 1 , in order from the object side claim 1 , the first lens component and a second lens component.11. The ocular lens according to claim 1 , wherein the second lens group includes a lens component in meniscus lens form having a convex surface facing the viewing eye side.16. The ocular lens with an additional lens according to claim 12 , wherein the additional lens can be mounted in a barrel that holds the ocular lens.17. An optical device comprising the ocular lens according to .18. An optical device comprising the ocular lens with additional lens according to . The present invention relates to an ocular lens, an ocular lens with an additional lens, and an optical device.For example, in an optical device such as a telescope, a binocular or a microscope, an ocular lens is used to further enlarge and view a real image formed by an objective lens. It is demanded that such an ocular lens have a sufficient eye relief (the on-axis spacing between the outermost lens surface of the ocular lens on the viewing eye side and the eye point (the position of the viewing eye) for comfortable viewing, as well as that the lens be well corrected for aberrations through a large angle of view. However, it is well known that, in ordinary cases, when the apparent field of view of an ocular lens is increased, it becomes difficult to secure a sufficiently long eye relief, and aberrations of a luminous flux at the periphery of the field of view, particularly field curvature aberration and astigmatism worsen abruptly.For example, an ocular lens constructed by disposing a negative lens group and a ...

Optical lens assembly for image taking

An optical lens assembly for image taking includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power includes a convex object-side surface at a paraxial region. The second lens element with negative refractive power includes a concave object-side surface at a paraxial region. The third lens element with refractive power includes a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region. The fourth lens element made of plastic with negative refractive power includes a concave object-side surface at a paraxial region and an image-side surface. At least one of the object-side surface and the image-side surface of the fourth lens element is aspheric, and the image-side surface of the fourth lens element is concave at a paraxial region and convex at a peripheral region.

Objective Optical System for Endoscope

An endoscope objective optical system includes, in order from an object side, a first lens composed of a negative single lens, a second lens composed of a positive single lens, an aperture stop, a third lens composed of a positive single lens, and a fourth lens composed of a positive combined lens, the third lens having a meniscus shape having a convex surface facing the image side. The endoscope objective optical system satisfies the following conditions: 0.3< Df/f <1.15,  (1) n 1<1.79,  (2) n 2> n 1,  (3) 0.6< IH/f <0.83,  (4) and | r 1|−| r 2|+ d 1>1.8  (5) Df is the distance from a surface of the first lens facing the object side to the aperture stop, f is the focal length of the entire system, IH is the maximum image height of the entire system, and d1 is the center thickness of the third lens.

COORDINATE MEASURING MACHINE AND METHOD FOR DETERMINING SPATIAL COORDINATES ON A MEASUREMENT OBJECT

A coordinate measuring machine has a workpiece support for holding a measurement object and a measuring head which can be displaced relative to the workpiece support. The measuring head carries an optical sensor. An evaluation and control unit is configured to determine spatial coordinates on the measurement object depending on a position of the measuring head relative to the workpiece support and depending on sensor data from the optical sensor. The optical sensor includes a lens assembly and a camera. The lens assembly comprises at least four separate lens-element groups. Three of these separate lens-element groups can be displaced along the optical axis of the lens assembly. A first lens-element group is arranged fixed in the region of the light-entry opening of the lens assembly. The coordinate measuring machine with the above-described lens assembly allows individual variation of magnification, focusing and resolution. 1. A coordinate measuring machine for determining spatial coordinates on a measurement object , comprising:a workpiece support for holding the measurement object,a measuring head which can be displaced relative to the workpiece support and which carries an optical sensor, andan evaluation and control unit configured to determine spatial coordinates on the measurement object depending on a position of the measuring head relative to the workpiece support and depending on sensor data from the optical sensor;wherein the optical sensor includes a lens assembly and a camera configured to record an image of the measurement object through the lens assembly,wherein the lens assembly has a lens body having a light-entry opening and a light-exit opening with an interface for connecting the camera,wherein the lens assembly further has a stop and a plurality of lens elements defining an optical axis and forming a first lens-element group, a second lens-element group, a third lens-element group and a fourth lens-element group,wherein the first lens-element ...

PROJECTION LENS AND PROJECTION-TYPE DISPLAY APPARATUS USING THE LENS

To provide a projection lens that is compact, lightweight, low-cost, and readily portable, a first lens having a positive power and at least one surface that is an aspheric surface; a second lens having a negative power and having a concave surface on the magnification side; a third lens having a positive power and having a convex surface on the reduction side; and a fourth lens having a positive power are arranged in order from the magnification side. In addition to arranging the lenses telecentrically on the reduction side, the following formulas are satisfied simultaneously, and images formed on the conjugation surface on the reduction side are enlarged and projected on the conjugation surface on the magnification side: formula (A) 0.8 Подробнее

Imaging lens and imaging apparatus

An imaging lens consists of a negative first lens, a negative second lens, a third lens of a plano-convex shape having a convex surface directed toward an object side or of a positive meniscus shape having a convex surface directed toward the object side, and a fourth lens of a plano-convex shape having a convex surface directed toward an image side or of a positive meniscus shape having a convex surface directed toward the image side, which are arranged in this order from the object side. Further, the following conditional formula (3) is satisfied: 1.0<| f 2/ f |<2.6  (3), where f: a focal length of an entire system, and f2: a focal length of the second lens.

OPTICAL DEVICE FOR CAMERA TESTING

An optical device is to be disposed between a test screen and a test camera that captures an image on the test screen through the optical device. The optical device includes first, second, third and fourth lenses arranged from a camera side to a screen side in the given order. The first lens has a shape factor ranging from −10 to 5, the second lens is a positive lens and has a shape factor ranging from −15 to 2, the third lens is a positive lens and has a shape factor ranging from −30 to 1, and the fourth lens is a positive lens and has a shape factor ranging from −30 to 1. A ratio of a focal length of the optical device to that of the test camera ranges from 1 to 80. 1. An optical device to be disposed between a test screen and a test camera that captures an image on the test screen through said optical device , said optical device comprising first , second , third and fourth lenses arranged from a camera side to a screen side in the given order , wherein:said first lens has a shape factor ranging from −10 to 5;said second lens is a positive lens and has a shape factor ranging from −15 to 2;said third lens is a positive lens and has a shape factor ranging from −30 to 1; andsaid fourth lens is a positive lens and has a shape factor ranging from −30 to 1;wherein a ratio of a focal length of said optical device to that of the test camera ranges from 1 to 80.2. The optical device as claimed in claim 1 , wherein said first lens is a negative lens and the shape factor of said first lens ranges from 1 to 5.3. The optical device as claimed in claim 2 , wherein the shape factor of said second lens ranges from −15 to −1.4. The optical device as claimed in claim 3 , wherein the shape factor of said third lens ranges from −1 to 1.5. The optical device as claimed in claim 4 , wherein the shape factor of said fourth lens ranges from −1 to 1.6. The optical device as claimed in claim 5 , having an aperture ranging between f/4 and f/50 claim 5 , in which f-number ranges between 4 ...

MOBILE DEVICE AND OPTICAL IMAGING LENS THEREOF

The present invention provides a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop, first, second, third and fourth lens elements positioned sequentially from an object side to an image side. The first lens element with positive refracting power has a surface facing toward the object side. The second lens element with negative refracting power has a convex surface facing toward the object. The third lens element has a positive refracting power. The fourth lens element has a surface facing toward the object side with a concave portion in the vicinity of the optical axis and a surface facing toward the image side with a convex portion in the peripheral vicinity. The optical imaging lens of the present invention is capable of shortening the total length of the optical imaging lens efficiently and has good optical characteristics. 1. An optical imaging lens , sequentially from an object side to an image side , comprises:an aperture stop; andfirst, second, third and fourth lens elements, each of said first, second, third, and fourth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side, wherein:said first lens element has positive refracting power, said object-side surface thereof comprises a convex portion in a vicinity of the optical axis;said second lens element has negative refracting power, said object-side surface thereof is a convex surface, and said image-side surface thereof comprises a concave portion in a vicinity of the optical axis;said third lens element has positive refracting power;said object-side surface of said fourth lens element comprises a convex portion in a vicinity of the optical axis, and said image-side surface of said 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; andthe optical imaging lens as a whole has ...

Photographing optical lens system

This invention provides a photographing optical lens system comprising: a first lens element with negative refractive power; a second lens element with positive refractive power having a concave object-side surface at paraxial region and a convex image-side surface at paraxial region; a third lens element with positive refractive power having a concave object-side surface at paraxial region and a convex image-side surface at paraxial region; and a fourth lens element with positive refractive power having a convex object-side surface at paraxial region and a concave image-side surface at paraxial region and a convex shape at peripheral region, and both surfaces being aspheric. The photographing optical lens system further satisfies conditional expressions as specified.

Image capturing lens assembly

An image capturing lens assembly includes, in order from an object-side to an image-side along an optical axis, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with negative refractive power has an image-side surface being concave at a paraxial region. The second lens element with positive refractive power has an image-side surface being convex at a paraxial region. The third lens element with negative refractive power has an object-side surface being concave at a paraxial region, and an image-side surface being convex at a paraxial region. The fourth lens element with positive refractive power has an object-side surface being convex at a paraxial region, and an image-side surface being concave at a paraxial region, and at least one of the object-side surface and the image-side surface is aspheric.

IMAGING LENS

An exemplary embodiment of the present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having positive (+) refractive power, a second lens having negative (−) refractive power, a third lens having positive (+) refractive power, a fourth lens having negative (−) refractive power, wherein the imaging lens meets a conditional expression of DD≦0, where D is a distance from an apex of an object side surface of the third lens to an apex of an image-forming surface, and D is an axial distance from the apex of an object side surface of the third lens to an effective diameter of an object side surface of the fourth lens. 1. An imaging lens , the imaging lens comprising: in an ordered way from an object side ,a first lens having positive (+) refractive power;a second lens having negative (−) refractive power;a third lens having positive (+) refractive power;a fourth lens having negative (−) refractive power,{'b': 4', '3', '3', '4, 'wherein the imaging lens meets a conditional expression of D−D≦0, where D is a distance from an apex of an object side surface of the third lens to an apex of an image-forming surface, and D is an axial distance from the apex of an object side surface of the third lens to an effective diameter of an object side surface of the fourth lens.'}2. The imaging lens of claim 1 , wherein the first lens takes a meniscus shape convexly formed at both surfaces to an object side.3. The imaging lens of claim 1 , wherein the second lens takes a concave shape at both surfaces.4. The imaging lens of claim 1 , wherein the third lens takes a meniscus shape convexly formed at both surfaces to an image side.5. The imaging lens of claim 1 , wherein the first claim 1 , second claim 1 , third and fourth lenses are aspherical at both surfaces.6. The imaging lens of claim 1 , meeting a conditional expression of f1/f≧0.8 claim 1 , where an entire focal length of an optical system is f claim 1 , and a ...

IMAGING LENS

A four element lens system for use with an imaging sensor includes first, second, third, and fourth lens elements and an optical filter that are arranged sequentially in order from an object side to an imaging side. The lens elements are coated with an anti-reflective film. The lens system further includes an optical filter that is disposed at a distance from the imaging sensor. The lens elements are relatively positioned to each other to satisfy specific conditions. The lens elements further include thickness to diameters ratios that satisfy specific conditions. 1. An imaging lens comprising first , second , third , and fourth lens elements arranged in order from an object side to an imaging side , each of the first , second , third , and fourth lens elements having an object-side surface facing toward the object side , and an imaging-side surface facing toward the imaging side , wherein the imaging lens satisfies the conditions of:{'br': None, 'i': Подробнее

ELECTRONIC DEVICE

An electronic device includes at least one optical lens assembly. The optical lens assembly includes four lens elements, and the four lens elements are, in order from an outside to an inside, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has an outside surface being convex in a paraxial region thereof. The second lens element has an inside surface being convex in a paraxial region thereof. The fourth lens element has an inside surface being concave in a paraxial region thereof, wherein at least one of an outside surface and the inside surface of the fourth lens element includes at least one critical point in an off-axis region thereof. 1. An electronic device , comprising at least one optical lens assembly , which comprises four lens elements , the four lens elements being in order from an outside to an inside:a first lens element, a second lens element, a third lens element and a fourth lens element;wherein each of the four lens elements has an outside surface facing towards the outside and an inside surface facing towards the inside;wherein the outside surface of the first lens element is convex in a paraxial region thereof, the inside surface of the first lens element is concave in a paraxial region thereof, the outside surface of the second lens element is convex in a paraxial region thereof, the inside surface of the fourth lens element is concave in a paraxial region thereof, and at least one of the outside surface and the inside surface of the fourth lens element comprises at least one critical point in an off-axis region thereof; [{'br': None, 'i': 'Vd/Nd', '0.65<2<1.54;'}, {'br': None, 'i': 'Vd/Nd', '0.65<3<1.54;'}, {'br': None, 'i': 'Vd/Nd', '0.65<4<1.54; and'}, {'br': None, 'i': 'Vd', '10.0<1<38.0.'}], 'wherein, when a measurement is made in accordance with a reference wavelength as a d-line, an Abbe number of the first lens element is Vd1, an Abbe number of the second lens element is ...

VARIABLE MAGNIFICATION OPTICAL SYSTEM AND IMAGING APPARATUS

In a variable magnification optical system, including a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, and a fourth lens group having a positive refractive power, arranged in order from the object side, in which magnification is changed by moving the second lens group and focusing is performed by moving the fourth lens group, the first lens group includes a positive lens and a positive cemented lens, arranged in order from the object side, the third lens group includes an aperture stop on the most object side, the fourth lens group includes a positive lens, a negative lens, and a positive lens, arranged in order from the object side, with at least one surface being an aspherical surface, and the system satisfies given conditional expressions. 2. The variable magnification optical system as claimed in claim 1 , wherein the variable magnification optical system satisfies conditional expressions given below:{'br': None, 'i': f', 'fw<, '3.5<1/5.0\u2003\u2003(1-1)'}{'br': None, 'i': f', 'p/f', 'c<, '0.8<111.9\u2003\u2003(2-1)'}{'br': None, 'i': R', 'c/fw<, '0.35<10.5\u2003\u2003(3-1)'}{'br': None, 'i': 'FNt/FNw<', '1.0≦1.3\u2003\u2003(4-1)'}{'br': None, 'i': 'FNt<', '1.6<2.0\u2003\u2003(5-1)'}4. The variable magnification optical system as claimed in claim 3 , wherein the variable magnification optical system satisfies conditional expressions given below:{'br': None, 'i': f', 'fw<, '2.5<3/4.0\u2003\u2003(6-1)'}{'br': None, 'i': f', 'c/f, '0.4<33<1.5\u2003\u2003(7-1)'}{'br': None, 'i': f', 'n/f, '−2.0<33<−0.5\u2003\u2003(8-1)'}{'br': None, 'i': 'dn≦νdp', '60<ν\u2003\u2003(9-1)'}6. The variable magnification optical system as claimed in claim 5 , wherein the variable magnification optical system satisfies conditional expressions given below:{'br': None, 'i': f', 'fw<, '0.9<|2|/1.2\u2003\u2003(10-1)'}{'br': None, 'i': 'w<−', '−0.6<β20.4\u2003\u2003(11-1)'}{' ...

OPTICAL IMAGING LENS WITH A FIXING STRUCTURE

A lens includes a barrel and a first optical element. The barrel includes an inner circumferential surface surrounding an axis and defining an accommodation space, an object side and an image side spaced at two ends of the axis and interconnecting with the accommodation space, and a first mounting portion integrally formed around the inner circumferential surface. The first mounting portion includes a first blocking portion having a first blocking surface corresponding to the object side. The first optical element is received in the accommodation space, and disposed in the first mounting portion, and includes a first body portion and a first stopping portion. The first stopping portion includes a first stopping surface leaning against the first blocking surface. The distance between an outermost edge of the first stopping portion and the axis is greater than the distance between an innermost edge of the first blocking portion and the axis. 1. An optical imaging lens with a fixing structure , comprising:a barrel, comprising an inner circumferential surface surrounding an axis and defining an accommodation space, an object side and an image side spaced at two ends of the axis and interconnecting with the accommodation space, and a first mounting portion integrally formed around the inner circumferential surface, wherein the first mounting portion comprises a first blocking portion, and the first blocking portion comprises a first blocking surface corresponding to the object side; anda first optical element, disposed in the accommodation space, and installed in the first mounting portion, and comprising a first body portion, and a first stopping portion disposed in the first body portion, wherein a distance between a radial outermost edge of the first stopping portion and the axis is greater than a distance between a radial innermost edge of the first blocking portion and the axis, and the first stopping portion comprises a first stopping surface corresponding to the ...

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;{'b': 1', '2', '3', '4', '1', '4', '1', '2', '3', '4', '1', '4, 'wherein the optical image capturing system consists of four lens elements with refractive power, at least one lens element among the first through fourth lens elements respectively have at least one inflection point on at least one surface thereof, 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 axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, thicknesses in parallel with an optical axis of the first lens element, the second lens element, the third lens element and the fourth lens element at height ½ HEP respectively are ETP, ETP, ETP and ETP, a sum of ETP to ETP described above is SETP, ...

IMAGING LENS AND IMAGING APPARATUS

An imaging lens consists of four lenses of, in order from the object side, a negative first lens, a negative second lens, a positive third lens, and a positive fourth lens. The following conditional expressions are satisfied: 1. An imaging lens consisting of , in order from the object side:a first lens having negative refractive power;a second lens having negative refractive power;a third lens having positive refractive power; anda fourth lens having positive refractive power, [{'br': None, 'i': Nd', 'Nd, '0.22<3−2\u2003\u2003(1);'}, {'br': None, 'i': D', 'f, '1.2<3/\u2003\u2003(2); and'}, {'br': None, '−0.4<(R3+R4)/(R3−R4)<1.0\u2003\u2003(7-5), where'}], 'wherein the following conditional expressions are satisfiedNd3 is a refractive index of the material of the third lens for d-line,Nd2 is a refractive index of the material of the second lens for d-line,D3 is a center thickness of the second lens,f is a focal length of an entire system,R3 is a paraxial curvature radius of an object-side surface of the second lens, andR4 is a paraxial curvature radius of an image-side surface of the second lens.2. An imaging lens consisting of , in order from the object side:a first lens having negative refractive power;a second lens having negative refractive power;a third lens having positive refractive power; anda fourth lens having positive refractive power, [{'br': None, 'i': Nd', 'Nd, '0.22<3−2\u2003\u2003(1);'}, {'br': None, 'i': D', 'f<, '2.5<2/4.5\u2003\u2003(3);'}, {'br': None, 'i': vd', 'vd, '30.0<2−3\u2003\u2003(5);'}, {'br': None, 'i': R', 'R', 'R', 'R, '−0.4<(3+4)/(3−4)<1.0\u2003\u2003(7-5); and'}, {'br': None, '0.46<(R8+R9)/(R8−R9)<3.0\u2003\u2003(14-5), where'}], 'wherein the following conditional expressions are satisfiedNd3 is a refractive index of the material of the third lens for d-line,Nd2 is a refractive index of the material of the second lens for d-line,D2 is an air space between the first lens and the second lens,f is a focal length of an entire system,vd2 ...

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.

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- ...

OPTICAL LENS AND PROJECTION APPARATUS

An optical lens includes a first lens with a positive refractive power, a second lens having a diffractive optical surface and a negative refractive power, and a third lens with a positive refractive power arranged in order from a magnified side to a minified side. A total number of lenses with refractive powers in the optical lens is smaller than six, and the first lens, the second lens and the third lens are made of plastic. 1. An optical lens , comprising:a first lens with a positive refractive power, a second lens having a diffractive optical surface and a negative refractive power, and a third lens with a positive refractive power arranged in order from a magnified side to a minified side, a total number of lenses with refractive powers in the optical lens being smaller than six, and the first lens, the second lens and the third lens being made of plastic.2. The optical lens as claimed in claim 1 , wherein the optical lens further comprises a lens with a negative refractive power disposed between the first lens and the second lens.3. The optical lens as claimed in claim 1 , wherein a depth of the diffractive optical surface is in the range of 0.29 um-2.5 um.4. The optical lens as claimed in claim 1 , wherein the optical lens further comprises an aperture stop claim 1 , and a distance between the aperture stop and the diffractive optical surface is kept fixed.5. The optical lens as claimed in claim 1 , wherein the optical lens further includes a Fresnel lens with a refractive power.6. The optical lens as claimed in claim 1 , wherein each of the first lens claim 1 , the second lens and the third lens is an aspheric lens.7. The optical lens as claimed in claim 1 , wherein the first lens and the third lens are made of PMMA claim 1 , and the second lens is made of EP5000 plastic.8. The optical lens as claimed in claim 1 , wherein the first lens and the third lens are made of PMMA claim 1 , and the second lens is made of E48R plastic.9. The optical lens as claimed in ...

IMAGING LENS SYSTEM, IDENTIFICATION MODULE AND ELECTRONIC DEVICE

An imaging lens system includes four lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element, and each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has negative refractive power. The fourth lens element has positive refractive power, and the image-side surface of the fourth lens element is convex in a paraxial region thereof. At least one lens element of the imaging lens system has at least one lens surface having at least one inflection point. 1. An imaging lens system comprising four lens elements , the four 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 and a fourth lens element; each of the four lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side;wherein the object-side surface of the first lens element is convex in a paraxial region thereof, the second lens element has positive refractive power, the object-side surface of the second lens element is convex in a paraxial region thereof, the object-side surface of the third lens element is convex in a paraxial region thereof, at least one lens element of the imaging lens system is made of plastic material and has at least one aspheric surface, a central thickness of the first lens element is a maximum value among central thicknesses of all lens elements of the imaging lens system, and a central thickness of the third lens element is larger than an axial distance between the second lens element and the third lens element; {'br': None, 'i': 'TL/ImgH', '5.0<<8.0.'}, 'wherein an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the imaging lens system is ...

MULTIFOCAL INTRAOCULAR LENS

The present invention is a multifocal intraocular lens including an optical body, a first support loop and a second support loop, wherein, the optical body is composed of a substrate layer and a coating layer; the substrate layer, the first support loop and the second support loop have a one-piece structure and are formed integrally with the same material; the coating layer is cemented on the substrate layer by means of injection-compression molding; the substrate layer and the coating layer are made of different materials. The optical body of the present invention is a multifocal optical zone with a double-cemented structure. The optical zone includes a plurality of binary surfaces and an aspheric surface, effectively correcting chromatic aberration of the secondary spectrum, improving image quality, expanding the range of additional optical power, and achieving a full range of vision. 1. A multifocal intraocular lens comprising:an optical body, a first support loop, and a second support loop;wherein, the optical body comprises a substrate layer and a coating layer;the substrate layer, the first support loop and the second support loop have a one-piece structure and are formed integrally with a same material;the coating layer is cemented on the substrate layer by means of injection-compression molding;the substrate layer and the coating layer are made of different materials.2. The multifocal intraocular lens according to claim 1 , wherein surfaces of the first support loop and the second support loop are both provided with an oblique serration groove or a protrusion frost; anda roughness of the protrusion frost or a height of the oblique serration groove is greater than 40 μm.3. The multifocal intraocular lens according to claim 1 , whereinthe optical body has four optical surfaces in an optical axis direction including a first optical surface, a second optical surface, a third optical surface, and a fourth optical surface, respectively;the first optical surface is ...

ZOOM LENS AND IMAGING APPARATUS HAVING FOUR LENS GROUPS

The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions. 1. A zoom lens consisting of:four or fewer lens groups, comprising a first lens group that has a negative refractive power and a second lens group that has a positive refractive power, in order from an object side,wherein during zooming, distances between adjacent groups in a direction of an optical axis are changed due to movement of at least the first lens group,wherein the first lens group consists of a lens that has a convex surface toward the object side and has a negative refractive power, a biconcave lens, and a positive lens that has a convex surface toward the object side, in order from the object side,wherein the second lens group has at least a lens that has a concave surface toward an image side, a stop, a biconvex lens, and a negative lens that has a concave surface toward the image side, successively in order from the object side,wherein the second lens group has only one cemented lens,wherein a cemented surface of the cemented lens of the second lens group has a shape convex toward the image side,wherein a lens group closest to the image side in the zoom lens remains stationary during zooming, andwherein the lens group closest to the image side in ...

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.

CAMERA OPTICAL LENS

A camera optical lens includes first to fourth lenses from an object side to an image side, with first and fourth lenses having negative refractive power, and a third lens having positive refractive power, and satisfies −3.50≤f1/f≤−2.00; 0.55≤f3/f≤0.75; 5.00≤d3/d4≤15.00; 5.00≤d5/d6≤35.00; −20.00≤(R3+R4)/(R3−R4)≤−3.00; and −5.00≤R1/R2≤−2.00, where f, f1, and f3 respectively denote focal lengths of the camera optical lens, the first lens, and the third lens, d3 and d5 respectively denote on-axis thicknesses of second and third lenses, d4 and d6 respectively denote a distance between second and third lenses and a distance between third and fourth lenses, R3 and R4 respectively denote curvature radii of object side and image side surfaces of the second lens, and R1 and R2 denotes curvature radii of object side and image side surfaces of the first lens, thereby having good optical performance while meeting design requirements of a wide angle and ultra-thinness. 1. A camera optical lens , comprising , from an object side to an image side:a first lens having a negative refractive power;a second lens;a third lens having a positive refractive power; anda fourth lens having a negative refractive power, [{'br': None, 'i': f', 'f≤−, '−3.50≤1/2.00;'}, {'br': None, 'i': f', 'f≤, '0.55≤3/0.75;'}, {'br': None, 'i': d', 'd, '5.00≤3/4≤15.00;'}, {'br': None, 'i': d', 'd, '5.00≤5/6≤35.00;'}, {'br': None, 'i': R', 'R', 'R', 'R, '−20.00≤(3+4)/(3−4)≤−3.00; and'}, {'br': None, 'i': R', 'R, '−5.00≤1/2≤−2.00,'}], 'where the camera optical lens satisfies following conditionswhere f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, f3 denotes a focal length of the third lens, d3 denotes an on-axis thickness of the second lens, d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens, d5 denotes an on-axis thickness of the third lens, d6 denotes an on-axis distance from an image side ...

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 ELECTRONIC APPARATUS INCLUDING THE SAME

An imaging lens includes an aperture stop and first to fourth lens elements arranged from an object side to an image side of the imaging lens. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance. 1. An imaging lens comprising an aperture stop , a first lens element , a second lens element , a third lens element , and a fourth lens element arranged in order from an object side to an image side along an optical axis of said imaging lens , each of said first lens element , said second lens element , said third lens element , and said fourth lens element having a refractive power , an object-side surface facing toward the object side , and an image-side surface facing toward the image side , wherein:said first lens element has a positive refractive power, and said image-side surface of said first lens element has a convex portion in a vicinity of the optical axis and a convex portion in a vicinity of a periphery of said first lens element;said second lens element has a negative refractive power, and said object-side surface of said second lens element has a concave portion in a vicinity of the optical axis and a concave portion in a vicinity of a periphery of said second lens element;said third lens element has a positive refractive power, said object-side surface of said third lens element has a concave portion in a vicinity of the optical axis and a concave portion in a vicinity of a periphery of said third lens element, and said image-side surface of said third lens element has a convex portion in a vicinity of the optical axis;said fourth lens element has a negative refractive power and is made of a plastic material, said object-side surface of said fourth lens element has a convex portion in a vicinity of the optical axis, and said image-side surface of said fourth lens element has a convex portion in a vicinity of a periphery of said ...

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.

IMAGING LENS

There is provided an imaging lens which is compact and corresponds to wide field of view, and achieves excellent optical performance. An imaging lens comprises in order from an object side to an image side, a first lens having a convex surface facing an image side and positive refractive power, a second lens having a concave surface facing the image side near an optical axis and negative refractive power, a third lens having the convex surface facing the image side and the positive refractive power, and a fourth lens being a meniscus lens having the convex surface facing an object side near the optical axis and having the negative refractive power, wherein said fourth lens is a double-sided aspheric lens and has a pole point at an off-axial position on the image-side surface, and a below conditional expression (1) is satisfied: 1. An imaging lens comprising , in order from an object side to an image side ,a first lens having a convex surface facing an image side and positive refractive power,a second lens having a concave surface facing the image side near an optical axis and negative refractive power,a third lens having the convex surface facing the image side and the positive refractive power, and [{'br': None, 'i': 'd', '0.5<Σ/TTL<0.9\u2003\u2003(1)'}, {'br': None, 'i': r', 'f<, '0.7<|5|/3.5\u2003\u2003(2)'}, {'br': None, 'i': f', 'f, '1.0≤1/\u2003\u2003(3)'}], 'a fourth lens being a meniscus lens having the convex surface facing an object side near the optical axis and having the negative refractive power, wherein said fourth lens is a double-sided aspheric lens and has a pole point at an off-axial position on the image-side surface, and below conditional expressions (1), (2) and (3) are satisfiedwhereΣd: distance along the optical axis from an object-side surface of the first lens to an image-side surface of the fourth lens,TTL: total track length,r5: curvature radius near the optical axis of the object-side surface of the third lens,f1: focal length of the ...

FOUR-PIECE OPTICAL LENS SYSTEM

A four-piece optical 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 negative refractive power, a third lens element with a positive refractive power, a fourth lens element with a negative refractive power. Such arrangements not only can be applied to a portable electronic product, but also has a long focal length, high pixel and low height. 1. A four-piece optical 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 convex 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 negative 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 second lens element being aspheric;a third 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 third lens element being aspheric; anda fourth 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 fourth lens element being aspheric;wherein an Abbe number of the fourth lens element is V4, an Abbe number of the third lens element is V3, and they satisfy the relation: 27 Подробнее

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

Image capturing lens system, image capturing apparatus and electronic device

An image capturing lens system includes, in order from an object side to an image side, a first lens element with positive 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 second lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, a third lens element with positive refractive power having an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof, and a 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.

PROJECTION LENS

A projection lens projecting an image beam provided by a light valve onto a screen is provided. The projection lens includes first to fourth lenses in order from a screen side to a display side along an optical axis. Each lens has a screen side surface facing the screen side and allowing the image beam to pass, and a display side surface facing the display side and allowing the image beam to pass. The first and third lenses have a negative refractive power, and the second and fourth lenses have a positive refractive power. The projection lens satisfies 21.45 claim 1 , wherein BFL is a distance from the display side surface of the ...

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 provided. 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, ...

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 provided. 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 four lens elements with refractive power, at least one lens element among the first through fourth lens elements respectively have at least one inflection point on at least one surface thereof, 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 the optical axis from an axial point on an object-side surface of the first lens element to an axial point on the image plane is HOS, thicknesses in parallel with an optical axis of the first lens element, the second lens element, the third lens element and the fourth lens element at height ½ HEP respectively are ETP1, ETP2, ETP3 and ETP4, a sum of ETP1 to ETP4 described above is SETP, thicknesses of the first lens element, the second lens element, ...

Optical Image Capturing System

A four-piece optical lens for capturing image and a five-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 with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are 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 first image plane, which is an image plane specifically for visible light and perpendicular to an optical axis; a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value at central field of view of the first image plane; anda second image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis; the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value at central of field of view of the second image plane;{'b': 1', '2', '3', '4, 'wherein the optical image capturing system comprises four lens elements with refractive powers, at least one of the four lens elements has positive refractive power; focal lengths of the four lens elements are respectively f, f, f and f; a focal length of the optical image capturing system is f, and an entrance pupil diameter of the optical image capturing system is HEP; a distance on the optical axis from an object-side surface of the first lens element to the first image plane is HOS, a distance on the optical axis from the object-side surface of the ...

Optical Image Capturing System

A four-piece optical lens for capturing image and a five-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 with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are 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 first image plane, which is an image plane specifically for visible light and perpendicular to an optical axis; a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value at central field of view of the first image plane; anda second image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis; the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value at central of field of view of the second image plane;wherein the optical image capturing system comprises four lens elements with refractive powers, at least one of the four lens elements has positive refractive power; focal lengths of the four lens elements are respectively f1, f2, f3 and f4; a focal length of the optical image capturing system is f, and an entrance pupil diameter of the optical image capturing system is HEP; a distance on the optical axis from an object-side surface of the first lens element to the first image plane is HOS, a distance on the optical axis from the object-side surface of the first lens element to ...

Camera Lens

A camera lens is disclosed. The camera lens includes, in an order from an object side to an image side, a first lens with a positive refractive power; a second lens with a negative refractive power; a third lens with a positive refractive power; and a fourth lens with a negative refractive power. The camera lens further satisfies specific conditions.

IMAGING OPTICAL LENS ASSEMBLY, IMAGE CAPTURING UNIT AND ELECTRONIC DEVICE

An imaging optical lens assembly includes four lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element and a fourth lens element. Each of the four lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. At least one of all lens surfaces of the four lens elements is aspheric and has at least one inflection point. 1. An imaging optical lens assembly comprising four lens elements , the four 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 and a fourth lens element; each of the four lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side , and the object-side surface of the fourth lens element being convex in a paraxial region thereof;{'b': 3', '4, 'claim-text': [{'br': None, '0.70 Подробнее

OPTICAL LENS ASSEMBLY

An optical lens assembly includes first, second, third, and fourth lens elements arranged in order from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The object-side surface of the first lens element has a convex portion in a vicinity of a periphery. The second lens element has negative refracting power. The object-side surface of the third lens element has a concave portion in a vicinity of a periphery. The image-side surface of the fourth lens element has a convex portion in a vicinity of a periphery. 1. An optical lens assembly comprising a first lens element , a second lens element , a fifth lens element , a third lens element , and a fourth lens element in order from an object side to an image side along an optical axis , each of the first lens element to the fifth lens element comprising an object-side surface facing the object side and allowing an imaging ray to pass through and an image-side surface facing the image side and allowing the imaging ray to pass through , lens elements having refractive power of the optical lens assembly consisting of five lens elements described above;the second lens element has negative refracting power;the object-side surface of the fourth lens element having a concave portion in a vicinity of a periphery, [{'br': None, 'HFOV≤25°;'}, {'br': None, 'i': TTL×Fno', 'EFL≤, '()/2.2; and'}, {'br': None, 'i': 'EFL/ALT≤', '2.5≤4.75,'}], 'wherein the optical lens assembly satisfieswherein HFOV is a half field of view of the optical lens assembly, TTL is a distance from the object-side surface of the first lens element to an image plane at the image side along the optical axis, Fno is an f-number of the optical lens assembly, EFL is an effective focal length of the optical lens assembly, and ALT is a sum of a thickness of the first lens element along the optical axis, a thickness of the second lens element along the optical axis, a thickness of the third ...

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 refractive power having an object-side surface being convex near an optical axis, a second lens element with a positive refractive power, a third 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, a fourth lens element with a negative refractive power having an object-side surface being convex near the optical axis and an image-side surface being concave near the optical axis. Such arrangements can provide a four-piece infrared single wavelength lens system which has a wide field of view, large stop, 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 refractive power, having an object-side surface being convex near an optical axis, at least one of the object-side surface and an image-side surface of the first lens element being aspheric;a second lens element with a positive refractive power, at least one of an object-side surface and an image-side surface of the second lens element being aspheric;a third 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 third lens element being aspheric; anda fourth lens element with a negative 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.2. The four-piece infrared single wavelength lens system as claimed in claim 1 , wherein a focal ...

OPTICAL SYSTEM AND OPTICAL APPARATUS

An optical system includes, in order from an object side to an image side, a first lens unit fixed during focusing, a second lens unit having a positive refractive power, configured to move during focusing, a third lens unit having a negative refractive power, configured to move during focusing, and a fourth lens unit fixed during focusing. During focusing from infinity to a short distance end, the second lens unit and the third lens unit move to the object side while a distance between the second lens unit and the third lens unit changes. A predetermined condition is satisfied. 2. The optical system according to claim 1 , wherein each of the second lens unit and the third lens unit consists of three lenses or less.3. The optical system according to claim 1 , wherein the distance between the second lens unit and the third lens unit increases during focusing from the infinity to the short distance end.12. The optical system according to claim 1 , further comprising an aperture stop provided between the first lens unit and the second lens unit.14. The optical system according to claim 1 , wherein the second lens unit includes a positive lens that is located closest to an object in the second lens unit and has a convex surface facing the object side.15. The optical system according to claim 1 , wherein the third lens unit includes a negative lens that is located closest to an image in the third lens unit and has a concave shape facing the image side.17. The optical system according to claim 1 , wherein the fourth lens unit consists of claim 1 , in order from the object side to the image side claim 1 , a (4-1)-st sub optical system having a positive refractive power which is located closest to an object in the fourth lens unit and does not include a negative lens claim 1 , and a (4-2)-nd sub optical system having a negative refractive power which includes the negative lens.19. The optical apparatus according to claim 18 , further comprising an image sensor configured to ...

OPTICAL IMAGING LENS ASSEMBLY, IMAGE CAPTURING UNIT AND ELECTRONIC DEVICE

An optical imaging lens assembly includes a focus tunable component and an imaging lens system. The imaging lens system includes, in order from an object side to an image side, a first lens group and a second lens group. The first lens group includes, in order from the object side to the image side, an object-side first lens element and an object-side second lens element. The second lens group includes, in order from the image side to the object side, an image-side first lens element and an image-side second lens element. At least one lens surface of at least one lens element in the imaging lens system is aspheric and has at least one inflection point. The imaging lens system has a total of at least four lens elements. 1. An optical imaging lens assembly , comprising:a focus tunable component; andan imaging lens system comprising, in order from an object side to an image side, a first lens group and a second lens group, wherein the first lens group comprises, in order from the object side to the image side, an object-side first lens element and an object-side second lens element, the second lens group comprises, in order from the image side to the object side, an image-side first lens element and an image-side second lens element, and each of all lens elements in the imaging lens system has an object-side surface facing toward the object side and an image-side surface facing toward the image side;wherein at least one lens surface of at least one lens element in the imaging lens system is aspheric and has at least one inflection point, the imaging lens system has a total of at least four lens elements, the lens elements of the first lens group are closer to the object side than other lens elements in the imaging lens system, and the lens elements of the second lens group are closer to the image side than other lens elements in the imaging lens system; [{'br': None, 'i': DLr', 'Lr', '/CTLr, '0.60<121;'}, {'br': None, 'i': RLr', 'f/RLr', 'r|<, '|224.5; and'}, {'br': ...

IMAGING LENS

An optical imaging lens includes a plurality of lens elements arranged in the given order from an object side to an imaging side. Each of the lens elements has a refracting power, an object-side surface facing toward the object side and an image-side surface facing toward the image side. The lens elements include a first lens element closest to the object side, a second lens element second closest to the object-side, a third lens element having a positive refracting power, and a fourth lens element having its object-side and image-side surfaces being aspheric. The object-side surface of the first lens element has a concave portion in the vicinity of the optical axis. The third lens element has at least one of the object-side and image-side surfaces being aspheric. 1. An optical imaging lens comprising , sequentially from an object side to an image side , a first lens element , a second lens element , a third lens element , and a fourth lens element , each of the first , second , third , and fourth lens element having an object-side surface facing toward the object side and an image-side surface facing toward the image side , wherein:the object-side surface of the first lens element has a convex portion in a vicinity of an optical axis;the object-side surface of the second lens element has a concave portion in a vicinity of the optical axis;the third lens element has a positive refracting power, and at least one of the object-side and image-side surfaces thereof is aspheric;the object-side surface of the fourth lens element has a convex portion in a vicinity of the optical axis, and the object-side and image-side surfaces thereof are aspheric; andthe optical imaging lens has only four lens elements having refracting power.2. The optical imaging lens of claim 1 , wherein TTL is a distance between the object-side surface of the first lens element and an image plane along the optical axis claim 1 , AAG is a sum of widths of air gaps from the first lens element to the ...

IMAGING OPTICAL SYSTEM, CAMERA DEVICE, AND PORTABLE INFORMATION TERMINAL APPARATUS

An imaging optical system includes, in order from the object side, a first lens group, an aperture stop, and a second lens group. The first lens group includes, in order from the object side, a negative lens of a biconcave shape and a positive meniscus lens with a convex surface facing the object side. The second lens group includes, in order from the object side, a second-front lens group and a second-rear lens group, the second-rear lens group having a positive refractive power as a whole. The second-front lens group includes a cemented lens formed by combing a negative lens with a concave surface facing the object side and a positive lens. 1. An imaging optical system comprising , in order from an object side:a first lens group;an aperture stop; anda second lens group, a negative lens of a biconcave shape; and', 'a positive meniscus lens with a convex surface facing the object side, the second lens group including, in order from the object side:', 'a second-front lens group; and', 'a second-rear lens group having a positive refractive power as a whole, and', 'wherein the second-front lens group includes a cemented lens formed by combining a negative lens with a concave surface facing the object side and a positive lens., 'the first lens group including, in order from the object side2. The imaging optical system according to claim 1 ,wherein the positive lens within the second-front lens group has a biconvex shape.3. The imaging optical system according to claim 1 , {'br': None, 'i': f', 'F/f|<, '3.00<|230.00,\u2003\u2003(1)'}, 'wherein conditional formula (1) below is satisfiedwhere,f is a focal length of the entire imaging optical system, andf2F is a focal length of the second-front lens group.4. The imaging optical system according to claim 1 , {'br': None, 'i': f', 'F', 'f|<, '0.30<|21/2.00,\u2003\u2003(2)'}, 'wherein conditional formula (2) below is satisfiedwhere,f is the focal length of the entire imaging optical system, andf2F1 is a focal length of the ...

OPTICAL IMAGE CAPTURING SYSTEM

An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four 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, both of the object-side surface and the image-side surface of the first lens element are convex surface on the optical axis;a second lens element with refractive power;a third lens element with refractive power;a fourth lens element with refractive power; andan image plane;the optical image capturing system comprises four lens elements with refractive powers;at least one lens element among the first to the fourth lens elements has positive refractive power; focal lengths of the first through the fourth lens elements are respectively f1, f2, f3 and f4; 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 the 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 fourth lens element is InTL; half of a maximum angle of view of the optical image capturing system is HAF; an outline curve starting from an axial point on any surface of any one of the four lens elements, tracing along an outline of the surface, and ending at a coordinate point on the surface that has a vertical height of ½ entrance pupil diameter from the optical axis, has a length denoted by ARE; conditions as ...

OPTICAL IMAGE CAPTURING SYSTEM

An optical image capturing system is provided. In the order from an object side to an image side, the optical image capturing system includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four 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, both of the object-side surface and the image-side surface of the first lens element are convex surface on the optical axis;a second lens element with refractive power;a third lens element with refractive power;a fourth lens element with refractive power; andan image plane,the optical image capturing system comprises four lens elements with refractive powers;at least one lens element among the first to the fourth lens elements has positive refractive power; focal lengths of the first through the fourth lens elements are respectively f1, f2, f3 and f4; 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 the 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 fourth lens element is InTL; half of a maximum angle of view of the optical image capturing system is HAF; thicknesses paralleling the optical axis, of the first lens element, of the second lens element, of the third lens element and of the fourth lens element at height of ½ HEP respectively are ETP1, ETP2, ETP3 and ETP4; a sum of the ETP1 to the ETP4 is SETP, thicknesses of the first lens element, the second lens ...

Optical Image Capturing System

A four-piece optical lens for capturing image and a five-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 with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras. 2. The optical image capturing system of claim 1 , wherein a wavelength of the infrared light ranges from 700 nm to 1300 nm claim 1 , and the first spatial frequency is denoted by SP1 claim 1 , which satisfies the following condition: SP1≦440 cycles/mm.3. The optical image capturing system of claim 1 , wherein an outline curve starting from an axial point on any surface of any one of the four lens elements claim 1 , tracing along an outline of the surface claim 1 , and ending at a coordinate point on the surface that has a vertical height of ½ entrance pupil diameter from the optical axis claim 1 , has a length denoted by ARE claim 1 , the following condition is satisfied: 0.9≦2(ARE/HEP)≦2.0.4. The optical image capturing system of claim 1 , wherein an image-side surface of the second lens element and an image-side surface of the third lens element on the optical axis are convex surfaces.5. The optical image capturing system of claim 1 , wherein half of a vertical maximum viewable angle of the optical image capturing system is denoted by VHAF claim 1 , and the following conditions are satisfied: VHAF≧10 deg claim 1 , 0 Подробнее

IMAGING LENS AND IMAGING APPARATUS

Disclosed are an imaging lens having satisfactory performance in a region of near infrared light, and an imaging apparatus including the imaging lens. The imaging lens includes, in order from an object side, as lenses having refractive power, only four lenses including a positive first lens L, a negative second lens L, a positive third lens L, and a positive fourth lens L. A conditional expression relating to a focal length fs1 of the first lens L with respect to s-line and a focal length fs of the entire system with respect to s-line: 0.5 Подробнее

Optical Image Capturing System

A four-piece optical lens for capturing image and a five-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 with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras. 2. The optical image capturing system of claim 1 , wherein a wavelength of the infrared light ranges from 700 nm to 1300 nm claim 1 , and the first spatial frequency is denoted by SP1 claim 1 , which satisfies the following condition: SP1≦440 cycles/mm.3. The optical image capturing system of claim 1 , wherein a horizontal distance paralleling the optical axis from a coordinate point on the object-side surface of the first lens element at height of ½ HEP to the first image plane is ETL; a horizontal distance paralleling the optical axis from the coordinate point on the object-side surface of the first lens element at height of ½ HEP to a coordinate point on the image-side surface of the fourth lens element at height of ½ HEP is EIN; conditions as follows are satisfied: 0.2≦EIN/ETL<1.4. The optical image capturing system of claim 1 , wherein an image-side surface of the second lens element and an image-side surface of the third lens element on the optical axis are convex surfaces.5. The optical image capturing system of claim 1 , wherein half of a vertical maximum viewable angle of the optical image capturing system is denoted by VHAF claim 1 , and the following conditions are satisfied: VHAF≧10 deg claim 1 , 0 Подробнее

IMAGING LENS AND IMAGING APPARATUS

The imaging lens consists of, in order from an object side, a positive first lens L, a negative second lens L, a positive third lens L, and a positive fourth lens L. Conditional expressions relating to a focal length f of an entire system, a combined focal length f234 of the second lens L to the fourth lens L, an Abbe number νd1 of the first lens L, an Abbe number νd2 of the second lens L, a radius of curvature R1 of a surface of the first lens L on the object side, and a radius of curvature R2 of a surface of the first lens L on an image side: 0.4 Подробнее

Fixing ring for lens module, lens module, and electronic device

A fixing ring for a lens module includes a first end surface, a second end surface opposite the first end surface, and a through hole defined through the first end surface and the second end surface. A protrusion is provided on an inner wall of the through hole. The protrusion includes a first inclined surface, a second inclined surface, and a connecting surface. The connecting surface is coupled between the first inclined surface and the second inclined surface. A side of the first inclined surface away from the connecting surface is coupled to the first end surface. A side of the second inclined surface away from the connecting surface is coupled to the second end surface. A light absorbing layer is provided on the connecting surface.

IMAGING LENS ASSEMBLY, CAMERA MODULE AND ELECTRONIC DEVICE

An imaging lens assembly includes a plastic barrel and an imaging lens set. The plastic barrel includes an object-side aperture and a first annular surface. The imaging lens set includes a plurality of optical elements, wherein at least one of the optical elements is a plastic lens element, and the plastic lens element includes an effective optical portion, a peripheral portion, a second annular surface, and an object-side connecting surface. The peripheral portion is formed around the effective optical portion. The second annular surface is formed on an object-side surface of the plastic lens element and surrounds the effective optical portion. The object-side connecting surface is formed on the object-side surface of the plastic lens element and surrounds the effective optical portion, and the object-side connecting surface is connected with one of the optical elements disposed on an object side of the plastic lens element. 1. An imaging lens assembly , comprising: an object-side aperture; and', 'a first annular surface formed in the plastic barrel and surrounding the object-side aperture; and, 'a plastic barrel, comprising an effective optical portion;', 'a peripheral portion formed around the effective optical portion;', 'a second annular surface formed on an object-side surface of the plastic lens element and surrounding the effective optical portion; and', 'an object-side connecting surface formed on the object-side surface of the plastic lens element and surrounding the effective optical portion, and the object-side connecting surface connected with one of the optical elements disposed on an object side of the plastic lens element, wherein the object-side connecting surface is closer to the effective optical portion than the second annular surface thereto;', 'wherein, the first annular surface and the second annular surface are parallel to each other, both of the first annular surface and the second annular surface are perpendicular to the optical axis, and ...

LENS SYSTEM, PROJECTION DEVICE, DETECTING MODULE AND ELECTRONIC DEVICE

An electronic device includes a lens system including four lens elements. the four lens elements are, in order from an outer side to an inner side, a first lens element, a second lens element, a third lens element and a fourth lens element. The second lens element has negative refractive power. The fourth lens element has positive refractive power. At least one surface of the four lens elements has at least one inflection point. A projection device and a detecting module of the electronic device including the lens system are also disclosed. 1. An electronic device comprising:a lens system comprising four lens elements which are, in order from an outer side to an inner side, a first lens element, a second lens element, a third lens element and a fourth lens element;wherein the first lens element has an outer-side surface being convex in a paraxial region thereof, the second lens element with negative refractive power has an outer-side surface being convex in a paraxial region thereof and an inner-side surface being concave in a paraxial region thereof, and each of at least two lens elements of the lens system has an Abbe number smaller than 22.0; [{'br': None, 'i': Y', 'EPD<, '0.10<(42×2)/1.20; and'}, {'br': None, 'i': Vdi<', 'i=, '40.0<Σ150.0, wherein 1,2,3,4.'}], 'wherein a maximum effective radius of an inner-side surface of the fourth lens element is Y42, an entrance pupil diameter of the lens system is EPD, an Abbe number of the i-th lens element is Vdi, and the following conditions are satisfied2. The electronic device of claim 1 , wherein the first lens element has positive refractive power claim 1 , and the fourth lens element has positive refractive power.3. The electronic device of claim 1 , wherein a maximum effective radius of the outer-side surface of the first lens element is Y11 claim 1 , the maximum effective radius of the inner-side surface of the fourth lens element is Y42 claim 1 , and the following condition is satisfied:{'br': None, 'i': Y', 'Y, ...

Imaging lens system and electronic apparatus employing the same

The imaging lens system includes a first lens group and a second lens group that are sequentially arranged from an object side to an image side. The first lens group has a negative refractive power and includes a first lens having an image-side surface concave toward the image side. The second lens group includes a lens that is closest to the object side and an aspheric lens that is closest to the image side. The lens that is closest to the object side has a positive refractive power and an object-side surface convex toward the object side. The aspheric lens that is closest to the image side has a positive or negative refractive power and at least one inflection point on an image-side surface thereof.

SWITCHABLE IMAGE CAPTURING SYSTEM

A switchable image capturing system is provided. Through modulating light by an electro-optical switch, the light intake received by the lens assembly and the image sensor may be changed. Specifically, when the electro-optical switch receives a positive voltage, the electro-optical switch obstructs the light so that the lens assembly and the image sensor are not able to image by receiving the light; when the electro-optical switch receives a negative voltage, the electro-optical switch allows the light to pass through so that the lens assembly and the image sensor is able to image by receiving the light. Through the configuration in the aforementioned statements, the image time of the image sensor may be controlled to interrupt or continue filming according to the user's needs. 1. A switchable image capturing system comprising:at least one image sensor positioned in a direction in which a light travels;at least one lens assembly positioned in the direction in which the light travels and in front of each of the image sensors, and an optical axis of the lens assembly overlapping a central normal line of a sensing surface of the image sensors in such a way that the light focuses on the image sensor;at least one electro-optical switch positioned in the direction in which the light travels, and each of the electro-optical switches changing a transmission rate thereof according to a control signal to obstruct a travel route of the light or to make the light pass through each of the electro-optical switches; anda microcontroller electrically connected to each of the electro-optical switches.2. The switchable image capturing system according to claim 1 , the microcontroller sends the control signal to each of the electro-optical switches according to a user command.3. The switchable image capturing system according to claim 2 , the microcontroller sends the control signal having a first voltage to each of the electro-optical switches according to the user command claim 2 , ...

FIXED FOCAL IMAGING LENS

A fixed focal imaging lens includes two lens sets and an aperture stop. One of the two lens sets is disposed between a magnified side and the aperture stop. The other one of the two lens sets is disposed between the aperture stop and a minified side. The lens set disposed between the magnified side and the aperture stop includes an aspheric lens and a compound lens, wherein the aspheric lens is a lens closest to the magnified side in the lens set, and the compound lens includes a plurality of lenses combined together. The lens set disposed between the aperture stop and the minified side includes a compound lens and an aspheric lens, wherein the compound lens includes a plurality of lenses combined together, and the aspheric lens is a lens closest to the minified side in the lens set. 1. A fixed focal imaging lens , comprising the followings sequentially arranged from a magnified side to a minified side: a first aspheric lens, being a lens closest to the magnified side in the first lens set; and', 'a first compound lens, comprising a plurality of lenses combined together;, 'a first lens set, comprising the followings sequentially arranged from the magnified side to the minified sidean aperture stop; and a second compound lens, comprising a plurality of lenses combined together; and', 'a second aspheric lens, being a lens closest to the minified side in the second lens set;, 'a second lens set, comprising the followings sequentially arranged from the magnified side to the minified sidewherein the number of lenses with refractive power in the fixed focal imaging lens is 6-8,wherein the number of aspheric lenses in the fixed focal imaging lens is 2 or 3, andwherein a distance between every two adjacent lenses in the fixed focal imaging lens is fixed during focusing.2. The fixed focal imaging lens according to claim 1 , wherein diameter of the lens closest to the magnified side is smaller than diameter of the lens closest to the minified side.3. The fixed focal imaging ...

IMAGING LENS AND IMAGING APPARATUS

An imaging lens with better performance including in focusing is disclosed. A first lens group always fixed and having positive refractive power, and a first focus lens group that moves in an optical axis direction at the time of focusing are included in order from the object side to the image side. A last lens group always fixed and having negative refractive power, and a second focus lens group that moves in an optical axis direction at the time of focusing are included in order from the image side to the object side. At least one of the first focus lens group or the second focus lens group has negative refractive power. The conditional expression 0.4 Подробнее

OPTICAL IMAGING SYSTEM

The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens and a fourth lens. The first lens has negative refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface; the second lens has refractive power; the third lens has refractive power; and the fourth lens has positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface thereof is a concave surface. A wavelength λ of a chief ray of the optical imaging system and a tangent tan θ of a half field-of-view of the optical imaging system satisfy 0.5 μm<λ*tan θ<1.0 μm. 1. An optical imaging system , comprising , sequentially from an object side to an image side along an optical axis , a first lens , a second lens , a third lens and a fourth lens ,wherein,the first lens has negative refractive power, a convex object-side surface, and a concave image-side surface;the second lens has refractive power;the third lens has refractive power; andthe fourth lens has positive refractive power, a convex object-side surface, and a concave image-side surface,wherein 0.5 μm<λ*tan θ<1.0 μm, where λ is a wavelength of a chief ray of the optical imaging system, and tan θ is a tangent of a half field-of-view of the optical imaging system.2. The optical imaging system according to claim 1 , wherein Fno<1.3 claim 1 ,where Fno is a relative F number of the optical imaging system.3. The optical imaging system according to claim 1 , wherein 0.5 Подробнее

Optical Assembly for a Compact Wide Field of View Digital Camera with Low First Lens Diameter to Image Diagonal Ratio

An optical assembly for a point action camera or other compact digital camera having a wide field of view, includes multiple lens elements, including at least one lens element that has an aspheric lens surface. The optical assembly is configured to provide a field of view in excess of 120 degrees. The optical assembly includes a ratio of a diameter of a first lens element at the object end of the optical assembly to an image diagonal is less than approximately 3. 1. A digital point action camera , comprising: a first optical group including two or more lens elements configured to collect and reduce a field angle of light incident at a field of view in excess of 120 degrees;', 'a second optical group including two or more spaced apart lens elements;', 'a third optical group including two or more lens elements, wherein at least one lens element of the third optical group includes an aspheric surface that is configured to correct higher order astigmatism; and', 'an aperture stop between said second and third optical groups, wherein a ratio of a diameter of a first lens element at the object end of the optical assembly to an image diagonal is less than approximately 3,', 'wherein the optical assembly comprises a depth of focus that is greater than 20 microns; and, '(a) an optical assembly, comprising from object end to image end(b) an image sensor disposed approximately at a focal plane of the optical assembly; and(c) a digital camera housing including electronics and a user interface, and containing said optical assembly and said image sensor in optically effective relative disposition.2. The digital camera of claim 1 , wherein 90% or more of return ghost foci are displaced at least +/−2 mm from the image sensor.3. The digital camera of claim 1 , wherein a stray light irradiance ratio is below 1/10 claim 1 ,000.4. The digital camera of claim 1 , wherein a stray light power ratio is below 1/100.5. The digital camera of claim 1 , wherein axial chromatic aberration is ...

Optical Assembly for a Compact Wide Field of View Digital Camera with Low First Lens Diameter to Image Diagonal Ratio

An optical assembly for a point action camera or other compact digital camera having a wide field of view, includes multiple lens elements, including at least one lens element that has an aspheric lens surface. The optical assembly is configured to provide a field of view in excess of 120 degrees. The optical assembly includes a ratio of a diameter of a first lens element at the object end of the optical assembly to an image diagonal is less than approximately 3. 1. A digital point action camera , comprising: a first optical group including two or more lens elements configured to collect and reduce a field angle of light incident at a field of view in excess of 120 degrees;', 'a second optical group including a doublet;', 'a third optical group including two or more lens elements, wherein at least one lens element of the third optical group includes an aspheric surface that is configured to correct higher order astigmatism; and', 'a fourth optical group configured to deliver a telecentric cone to the image sensor; and', 'wherein the optical assembly further comprises an aperture stop between said second and third optical groups, wherein a ratio of a diameter of a first lens element at the object end of the optical assembly to an image diagonal is less than approximately 3,, '(a) an optical assembly, comprising from object end to image endwherein the optical assembly comprises a depth of field that is greater than 20 microns; and(b) an image sensor disposed approximately at a focal plane of the optical assembly; and(c) a digital camera housing including electronics and a user interface, and containing said optical assembly and said image sensor in optically effective relative disposition.2. The digital point action camera of claim 1 , wherein a diameter of a convexo-concave or meniscus lens of said first optical group is less than 30 mm.3. The digital point action camera of claim 1 , wherein a diameter of a convexo-concave or meniscus lens of said first optical group ...

Camera Including Two Light Folding Elements

An optical system includes a first light folding element (e.g., a prism), a second light folding element (e.g., another prism or a mirror), and a lens system located between the first light folding element and the second light folding element. In some cases, the lens system includes a lens stack having either four or five lens elements with refractive power. The first light folding element redirects light from an object field from a first axis to the lens system on a second axis. The plurality of refractive lens elements in the lens stack refract the light to the second light folding element. The second light folding element redirects the light from the second axis onto a third axis to form an image of the object field at an image plane. The optical system has a 35 mm equivalent focal length within a range of 85 to 160 mm. 1. An optical system , comprising:a first light folding element;a second light folding element; anda lens system located between the first light folding element and the second light folding element, wherein the lens system includes a lens stack having either four or five lens elements with refractive power;wherein the first light folding element redirects light from an object field from a first axis to the lens system on a second axis;wherein the plurality of refractive lens elements in the lens stack refract the light to the second light folding element;wherein the second light folding element redirects the light from the second axis onto a third axis to form an image of the object field at an image plane; andwherein the optical system has a 35 mm equivalent focal length within a range of 85 to 160 mm.2. The optical system of claim 1 , wherein the lens system has an F-number within a range of 2.8 to 3.5.3. The optical system as recited in claim 1 , wherein the first light folding element is a first prism claim 1 , and wherein the second light folding element is a second prism.4. The optical system as recited in claim 3 , wherein the lens stack ...

CAMERA OPTICAL LENS

The present invention relates to the field of optical lenses, and provides a camera optical lens, including, from an object side to an image side, a first lens having a positive refractive power, a second lens a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, and a fifth lens. At least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies: 0≤R7; and R10≤0, where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens. The camera optical lens provided by the present invention satisfies design requirements of a long focal length and ultra-thinness while having excellent optical performance. 1. A camera optical lens , comprising , from an object side to an image side:a first lens having a positive refractive power;a second lens having a negative refractive power;a third lens having a positive refractive power;a fourth lens having a negative refractive power; anda fifth lens,wherein at least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies following conditions:0≤R7; andR10≤0,where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens.2. The camera optical lens as described in claim 1 , further satisfying a following condition:0.50≤d4/d6≤25.00,where d4 denotes an on-axis distance form an image side surface of the second lens to an object side surface of the third lens, and d6 denotes an on-axis distance from an image side surface of the third lens to the object side surface of the fourth lens.3. The camera optical lens as described in claim 1 , further satisfying following conditions:0.20≤f1/f≤0.76;−1.47≤(R1+R2)/(R1−R2)≤−0.29; and0.08≤d1/TTL≤0.35,where f denotes a ...

IMAGING LENS

There is provided an imaging lens with excellent optical characteristics which satisfies demand of a low profile and a low F-number. An imaging lens comprises in order from an object side to an image side, a first lens with positive refractive power being formed in a meniscus shape having an object-side surface being convex in a paraxial region, a second lens with negative refractive power in a paraxial region, a third lens with positive refractive power having an object-side surface being concave in a paraxial region, and a fourth lens with negative refractive power having an image-side surface being concave in a paraxial region, and predetermined conditional expressions are satisfied. 2. The imaging lens according to claim 1 , wherein an object-side surface of said second lens is concave in the paraxial region.3. The imaging lens according to claim 1 , wherein the following conditional expression (5) is satisfied:(5) 2.50<(T2/f)×100<10.50whereT2: a distance along the optical axis from an image-side surface of the second lens to an object-side surface of the third lens, andf: a focal length of the overall optical system of the imaging lens.4. The imaging lens according to claim 1 , wherein the following conditional expression (6) is satisfied:(6) 8.00 Подробнее

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 four lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements and designing an equation, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is 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 said first , second , third and fourth lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side , wherein:the object-side surface of the first lens element comprises a convex portion in a vicinity of the optical axis;the third lens element has positive refracting power, and the object-side surface thereof comprises a concave portion in a vicinity of the optical axis and 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;the optical imaging lens as a whole comprises only the four lens elements having refracting power; and {'br': None, 'i': 'ALT/AC', '5.20≦23.'}, 'an air gap between the second lens element and the third lens element along the optical axis is AC23, a sum of a thickness of all four lens elements along the optical axis is ALT, and AC23 and ALT satisfy the equation2. The optical imaging lens according to claim 1 , wherein a central thickness of the third lens element along the optical axis is CT3 claim 1 , an air gap between the third lens element and the fourth lens element along the optical axis is AC34 claim 1 , and CT3 and AC34 satisfy the equation ...

LENS UNIT AND MANUFACTURING METHOD THEREFOR

A lens unit may include at least four lens groups and a tube-shaped holder holding the lens groups. The tube-shaped holder is provided with a second lens group holding part provided with a protruded part surrounding an outer peripheral end part of the second lens group through a gap space and the protruded part is provided with a caulked part which is deformed so as to cover the outer peripheral end part from the object side. The protruded part may be provided with a thick portion and a thin portion extended to the front side from the thick portion and the thin portion is caulked by being plastically deformed to be the caulked part. After the second lens group is mounted on an inner side to the protruded part, the position of the second lens group is adjusted and then a caulked part is formed. 1. A lens unit for use with an object to be photographed , comprising:a first lens group;a second lens groupa third lens group;a fourth lens group; anda tube-shaped holder which holds the first lens group, the second lens group, the third lens group, the and fourth lens group;wherein the first lens group, the second lens group, the third lens group, and the fourth lens group are arranged in sequential order from an object side closest to the object to be photographed;wherein the tube-shaped holder is provided with a second lens group holding part which holds a second lens group located at a second position from the object side;wherein the second lens group holding part is provided with a protruded part which surrounds an outer peripheral end part of the second lens group through a gap space between the outer peripheral end part of the second lens group and the protruded part in a first direction intersecting an optical axis direction and in a second direction intersecting the optical axis direction and the first direction; andwherein the protruded part is provided with a caulked part which is deformed so as to cover the outer peripheral end part from the object side.2. The ...

ZOOM LENS, OPTICAL APPARATUS, AND METHOD FOR MANUFACTURING THE ZOOM LENS

Provided is a zoom lens having, in order from an object, a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, and a fourth lens group (G) having positive refractive power, wherein the first lens group (G), the second lens group (G) and the third lens group (G) move along the optical axis for zooming, and the conditional expressions (1) and (2) are satisfied. 1. A zoom lens comprising , in order from an object:a first lens group having positive refractive power;a second lens group having negative refractive power;a third lens group having positive refractive power; anda fourth lens group having positive refractive power, [{'br': None, 'i': T/β', 'W<, '8.000<β2212.000'}, {'br': None, 'i': T/β', 'W<, '2.000<β335.000'}], 'the first lens group, the second lens group and the third lens group moving along an optical axis for zooming, and the following conditional expressions being satisfiedwhereβ2T denotes the lateral magnification of the second lens group in the telephoto end state,β2W denotes the lateral magnification of the second lens group in the wide-angle end state,β3T denotes the lateral magnification of the third lens group in the telephoto end state, andβ3W denotes the lateral magnification of the third lens group in the wide-angle end state.2. The zoom lens according to claim 1 , wherein {'br': None, 'i': T/β', 'W', 'T/β', 'W, '1.000<(β22)/(β33)<4.000.'}, 'the following conditional expression is satisfied3. The zoom lens according to claim 1 , whereinthe first lens group includes, in order from the side closest to the object, a negative lens and a positive lens, and {'br': None, 'i': f', 'c', 'f, '0.000<(−1)/1<250.000'}, 'the following conditional expression is satisfiedwheref1c denotes a composite focal length of the negative lens and the positive lens constituting the first lens group, and{'b': '1', 'f1 denotes a focal length of the first lens ...

SINGLE-FOCUS OPTICAL SYSTEM AND OPTICAL APPARATUS USING THE SAME

A single-focus optical system includes a front lens unit and a rear lens unit. The front lens unit either includes a predetermined sub lens unit or includes an enlargement-side sub lens unit and a predetermined sub lens unit. The rear lens unit includes a first sub lens unit, a second sub lens unit, a third sub lens unit, and a fourth sub lens unit. The enlargement-side sub lens unit includes a negative lens component. The predetermined sub lens unit includes an enlargement-side meniscus lens component and a reduction-side meniscus lens component. The first sub lens unit includes positive lenses and a first predetermined negative lens. The second sub lens unit includes a predetermined negative lens component. The third sub lens unit includes a predetermined positive lens component. The fourth sub lens unit includes all lens components positioned on the reduction side of the predetermined positive lens component. 1. A single-focus optical system which forms a conjugate relationship between a conjugate point on an enlargement side where a distance is long and a conjugate point on a reduction side where a distance is short , comprising in order from the enlargement side:a front lens unit; anda rear lens unit, whereinthe front lens unit either includes a predetermined sub lens unit or includes in order from the enlargement side, an enlargement-side sub lens unit and the predetermined sub lens unit, andthe rear lens unit includes in order from the enlargement side, a first sub lens unit, a second sub lens unit, a third sub lens unit, and a fourth sub lens unit, anda lens component is one of a single lens and a cemented lens, andthe enlargement-side sub lens unit, in order from the enlargement side, either includes only one negative lens component or includes a plurality of negative lens components, andthe predetermined sub lens unit includes an enlargement-side meniscus lens component and a reduction-side meniscus lens component, andthe enlargement-side meniscus lens ...

PROJECTION LENS SYSTEM, PROJECTION APPARATUS, SENSING MODULE AND ELECTRONIC DEVICE

A projection lens system having a magnification side and a reduction side, which projects light from a conjugation surface on the reduction side onto a conjugation surface on the magnification side. The projection lens system includes a focus tunable component and a lens assembly, wherein the lens assembly includes a plurality of lens elements, and at least one surface of at least one of the lens elements includes at least one inflection point. 1. A projection lens system , having a magnification side and a reduction side , which projects a light from a conjugation surface on the reduction side onto a conjugation surface on the magnification side , the projection lens system comprising:a focus tunable component; anda lens assembly, comprising a plurality of lens elements, and at least one surface of at least one of the lens elements comprising at least one inflection point; {'br': None, 'i': 'f/ft', '0<|Δ()|<0.15.'}, 'wherein a focal length of the projection lens system is f, a focal length of the focus tunable component is ft, and the following condition is satisfied2. The projection lens system of claim 1 , wherein the focus tunable component is disposed on a magnification side of the lens assembly.3. The projection lens system of claim 1 , wherein the focal length of the projection lens system is f claim 1 , the focal length of the focus tunable component is ft claim 1 , and the following condition is satisfied:{'br': None, 'i': 'f/ft', '0<|Δ()|<0.05.'}4. The projection lens system of claim 1 , wherein a focal length of the lens assembly is fa claim 1 , the focal length of the focus tunable component is ft claim 1 , and the following condition is satisfied:{'br': None, 'i': 'fa/ft|<', '|0.10.'}5. The projection lens system of claim 1 , wherein a focal length of the focus tunable component at a temperature of 50° C. is ft50 claim 1 , the focal length of the projection lens system is f claim 1 , and the following condition is satisfied:{'br': None, 'i': ft', '×f, ...

Projection lens structure

A projection lens structure mainly includes a first group of lenses with a negative dioptric value, a second group of lenses with a positive dioptric value, a third group of lenses with a positive dioptric value and a fourth group of lenses with a negative dioptric value. The first group of lenses further includes at least a first lens and a second lens, of which the first lens ha a plastic aspheric lens in a meniscus shape with a focal length between −25˜−80 mm. The second group of lenses further includes at least a third lens. The third group of lenses further includes at least a first doublet with a focal length between 25˜80 mm. The fourth group of length further includes at least a group of doublets, a fourth lens and a fifth lens.

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. By controlling the convex or concave shape of the surfaces of the lens elements and designing parameters to satisfy at least three inequalities, the length of the optical imaging lens may be shortened while maintaining improved optical characteristics. 1. An optical imaging lens , sequentially from an object side to an image side along an optical axis , comprising a first lens element , an aperture stop , and second , third and fourth lens elements , each of the first , second , third and fourth lens elements 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 refractive index;the second lens element has a refractive index, and the image-side surface thereof comprises a convex portion in a vicinity of a periphery of the second lens element;the third lens element has a positive refractive index, and the object-side surface thereof comprises a concave portion in a vicinity of the optical axis;the fourth lens element has a refractive index, and the image-side surface thereof comprises a concave portion in a vicinity of the optical axis I and a convex portion in a vicinity of a periphery of the fourth lens element;the optical imaging lens comprises no other lenses having refractive index beyond the four lens elements; and [{'br': None, 'i': v', 'v, '|1−2|≧25,'}, {'br': None, 'i': G', 'T', 'T', 'G, '(12+3)/(1+23)≧2.25, and'}, {'br': None, 'ALT/Gaa≧2.45.'}], 'an abbe number of the first lens element is represented by v1, an abbe number of the second lens element is represented by v2, a central thickness of the first lens element is represented by T1, a central thickness of the third lens element is represented by T3, an air gap between the first lens element and the second lens element ...

Camera Lens

The present invention discloses a camera lens composed of 4 ultrathin and high-luminous flux wide angle lenses with excellent optical properties. The lenses are lined up in turn from the object side as follows: 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 meets specific conditions. 1. A camera lens , comprising , lined up in turn from the object 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 negative refractive power; [{'br': None, 'i': f', 'f≦, '0.90≦1/1.00,'}, {'br': None, 'i': f', 'f≦−, '−3.50≦2/2.00,'}, {'br': None, 'i': R', 'R', 'R', 'R, '−0.80≦(1+2)/(1−2)≦−0.30,'}, {'br': None, 'i': R', 'R', 'R', 'R, '1.80≦(3+4)/(3−4)≦3.00,'}, {'br': None, 'i': d', 'f≦, '0.15≦4/0.25.'}], 'wherein the camera lens satisfies the conditions as followswhere, f is the overall focal distance of the camera lens;f1 is the focal distance of the first lens;f2 is the focal distance of the second lens;R1 is the object side curvature radius of the first lens;R2 is the image side curvature radius of the first lens;R3 is the object side curvature radius of the second lens;R4 is the image side curvature radius of the second lens; andD4 is the axial distance from the image side of the second lens to the object side of the third lens.2. The camera lens as described in further satisfying the following conditions:{'br': None, 'i': f', 'f≦, '0.50≦3/0.70'}where, f is the overall focal distance of the camera lens, and f3 is the focal distance of the third lens.3. The camera lens as described in further satisfying the following conditions:{'br': None, 'i': f', 'f≦−, '−0.75≦4/0.55'}where, f is the overall focal distance of the camera lens, and f4 is the focal distance of the fourth lens. The present invention discloses a camera lens, ...

IMAGING LENS

Designed for a solid-state image sensor, it includes, in order from an object side to an image side: a first positive lens having a convex object-side surface; a second negative lens having a concave image-side surface; a third positive meniscus lens having a convex image-side surface; and a fourth negative lens having concave object-side and image-side surfaces near an optical axis. A first diffraction optical surface is formed on one lens surface of the first to third lenses, and a second one is formed on the fourth lens object-side surface. The imaging lens satisfies a conditional expression below, 1. An imaging lens for a solid-state image sensor in which elements are arranged in order from an object side to an image side , comprising:a first lens with positive refractive power having a convex surface on the object side;a second lens with negative refractive power having a concave surface on the image side;a third lens with positive refractive power as a meniscus lens having a convex surface on the image side; anda fourth lens with negative refractive power having a concave surface on each of the object side and the image side near an optical axis, [{'br': None, 'i': Подробнее

Observation optical system and apparatus having the same

An observation optical system includes, in order from a display panel side to an observation side, a first lens having a positive refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power, and an optical path brancher configured to branch an optical path, and disposed between a display panel and the first lens. An absolute value of a radius of curvature of a lens surface on the observation side of the first lens is smaller than that on the display panel side of the first lens. A predetermined condition is satisfied.

OPTICAL LENS ASSEMBLY AND ELECTRONIC DEVICE COMPRISING SAME

Provided are an optical lens assembly and an electronic apparatus. The optical lens assembly includes a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a refractive power, and a moving lens group movable to be inserted in or removed from between the third lens and the fourth lens, wherein the first, second, third, and fourth lenses and the moving lens group are sequentially arranged from an object side to an image side. The moving lens group is moved between the third lens and the fourth lens for infrared (IR) photography. 1. An optical lens assembly comprising:a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive a refractive power, a fourth lens having a refractive power, and a moving lens group that is movable to be inserted in or removed from between the third lens and the fourth lens, the first, second, third, and fourth lenses and the moving lens group being sequentially arranged from an object side to an image side,wherein the moving lens group is moved into between the third lens and the fourth lens for infrared (IR) photography, [{'br': None, 'i': T', 'OAL<, '0.14<34/0.3'}, {'br': None, 'i': V', 'V, '3−2>35\u2003\u2003'}], 'and the optical lens assembly satisfies the following inequalitywhere T34 indicates an air gap between the third lens and the fourth lens, OAL indicates an overall length of the optical lens assembly, V2 indicates an Abbe number of the second lens, and V3 indicates an Abbe number of the third lens.2. The optical lens assembly of claim 1 ,further comprising a lens having a positive or negative refractive power, closest to the image side.3. The optical lens assembly of claim 1 , whereinthe moving lens group is configured to correct a focus difference that is generated according to an object distance and the wavelength of light that is ...

OPTICAL LENS ASSEMBLY

The present disclosure discloses an optical lens assembly. The optical lens assembly includes sequentially a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis. The first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface. The second lens has a negative refractive power, and an object-side surface of the second lens is a concave surface. The third lens has a positive refractive power or a negative refractive power. The fourth lens has a negative refractive power. An air spacing T23 between the second lens and the third lens on the optical axis and an air spacing T34 between the third lens and the fourth lens on the optical axis satisfy: T23/T34<0.2. 1. An optical lens assembly , comprising sequentially a first lens , a second lens , a third lens and a fourth lens from an object side to an image side along an optical axis ,wherein the first lens has a positive refractive power, and an object-side surface of the first lens is a convex surface;the second lens has a negative refractive power, and an object-side surface of the second lens is a concave surface;the third lens has a positive refractive power or a negative refractive power; andthe fourth lens has a negative refractive power,wherein an air spacing T23 between the second lens and the third lens on the optical axis and an air spacing T34 between the third lens and the fourth lens on the optical axis satisfy: T23/T34<0.2.2. The optical lens assembly according to claim 1 , wherein a combined refractive power of the first lens claim 1 , the second lens and the third lens is a positive refractive power.3. The optical lens assembly according to claim 1 , having a half of a maximal field-of-view angle HFOV claim 1 , wherein the half of the maximal field-of-view angle HFOV satisfies: HFOV≤20°.4. The optical lens assembly according to claim 2 , having a total effective focal length f claim 2 , wherein a ...

CAMERA OPTICAL LENS

The present disclosure provides a camera optical lens, which includes, from an object side to an image side in sequence: a first lens having a positive refractive power; a second lens having a positive refractive power; a third lens having a positive refractive power; a fourth lens having a refractive power; where the camera optical lens satisfies following conditions: 10.00≤d5/d6≤25.00; 2.00≤f2/f≤9.00; 3.00≤(R7+R8)/(R7−R8)≤25.00; and −2.00≤f4/f≤10.41. The camera optical lens satisfies a design requirement of a large aperture, ultra-thinness and a wide angle while having good optical functions. 1. A camera optical lens comprising , from an object side to an image side in sequence:a first lens having a positive refractive power;a second lens having a positive refractive power;a third lens having a positive refractive power;a fourth lens having a refractive power; and [{'br': None, 'i': d', 'd, '10.00≤5/6≤25.00;'}, {'br': None, 'i': f', 'f≤, '2.00≤2/9.00;'}, {'br': None, 'i': f', 'f≤, '−2.00≤4/10.41; and'}, {'br': None, 'i': R', 'R', 'R', '−R, '3.00≤(7+8)/(78)≤25.00;'}], 'wherein the camera optical lens satisfies following conditionswhered5 denotes an on-axis thickness of the third lens;d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens;f2 denotes a focal length of the second lens;f denotes a focal length of the camera optical lens;f4 denotes a focal length of the fourth lens;R7 denotes a curvature radius of an object-side surface of the fourth lens; andR8 denotes a curvature radius of an image-side surface of the fourth lens.2. The camera optical lens according to further satisfying the following condition:{'br': None, 'i': 'd', '0.10≤1/TTL≤0.30;'}where d1 denotes an on-axis thickness of the first lens; andTTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis.3. The camera optical lens according to ...

CAMERA OPTICAL LENS

Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power. The camera optical lens satisfies following conditions: −0.75≤f1/f2≤−0.67; 0.32≤f4/f2≤0.40; 5.00≤R7/R8≤6.00; and 1.40≤d1/d2≤3.20, where f1, f2, and f4 denote focal lengths of the first, second and fourth lenses, respectively; R7 and R8 denote curvature radiuses of an object side surface and an image side surface of the fourth lens, respectively; d1 denotes an on-axis thickness of the first lens; and d2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses. 1. A camera optical lens , comprising , sequentially from an object side to an image side:a first lens having a positive refractive power;a second lens having a negative refractive power;a third lens having a positive refractive power; anda fourth lens having a negative refractive power, [{'br': None, 'i': f', 'f, '−0.75≤1/2≤−0.67;'}, {'br': None, 'i': f', 'f, '0.32≤4/2≤0.40;'}, {'br': None, 'i': R', 'R, '5.00≤7/8≤6.00; and'}, {'br': None, 'i': d', 'd, '1.40≤1/2≤3.20,'}], 'wherein the camera optical lens satisfies following conditionswheref1 denotes a focal length of the first lens;f2 denotes a focal length of the second lens;f4 denotes a focal length of the fourth lens;R7 denotes a curvature radius of an object side surface of the fourth lens;R8 denotes a curvature radius of an image side surface of the fourth lens;d1 denotes an on-axis thickness of the first lens; andd2 denotes an on-axis distance from an image side surface of the first lens to an object side surface of the second lens.2. The camera optical lens as described ...

CAMERA OPTICAL LENS

The present disclosure relates to a camera optical lens satisfying following conditions: 3.00≤f2/f≤5.00, 13.00≤d5/d6≤25.00, 3.00≤(R5+R6)/(R5−R6)≤10.00, and 5.00≤R3/R4≤50.00; where f denotes an overall focal length of the camera optical lens, f2 denotes a focal length of a second lens, d5 denotes an on-axis thickness of a third lens, d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of a fourth lens, R5 and R6 respectively denote a curvature radius of an object-side surface and the image-side surface of the third lens, and R3 and R4 respectively denote a curvature radius of an object-side surface and an image-side surface of the second lens. The camera optical lens in the present disclosure satisfies a design requirement of large aperture and wide angle while having good optical functions. 1. A camera optical lens comprising , from an object side to an image side:a first lens having a positive refractive power;a second lens having a positive refractive power;a third lens having a positive refractive power; anda fourth lens having a negative refractive power; [{'br': None, 'i': f', 'f≤, '3.00≤2/5.00;'}, {'br': None, 'i': d', 'd, '13.00≤5/6≤25.00;'}, {'br': None, 'i': R', 'R', 'R', '−R, '3.00≤(5+6)/(56)≤10.00;'}, {'br': None, 'i': R', 'R, '5.00≤3/4≤50.00;'}], 'wherein the camera optical lens satisfies following conditionswheref denotes an overall focal length of the camera optical lens;f2 denotes a focal length of the second lens;d5 denotes an on-axis thickness of the third lens;d6 denotes an on-axis distance from an image-side surface of the third lens to an object-side surface of the fourth lens;R5 denotes a curvature radius of an object-side surface of the third lens;R6 denotes a curvature radius of the image-side surface of the third lens;R3 denotes a curvature radius of an object-side surface of the second lens; andR4 denotes a curvature radius of an image-side surface of the second lens.2. The camera optical ...

CAMERA OPTICAL LENS

Provided is a camera optical lens including, sequentially from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; and a fourth lens having a negative refractive power. The camera optical lens satisfies following conditions: 2.00≤(f1+f3)/f≤2.30; −8.60≤(f2+f4)/f≤−4.80; −2.10≤(R1+R)/(R1−R2)≤−1.90; −4.00≤(R3+R4)/(R3−R4)≤−1.00; and 2.00≤(R7+R8)/(R7−R8)≤3.40. The camera optical lens can achieve high optical performance while satisfying design requirements for ultra-thin, wide-angle lenses having large apertures. 1. A camera optical lens , comprising , sequentially from an object side to an image side:a first lens having a positive refractive power;a second lens having a negative refractive power;a third lens having a positive refractive power; anda fourth lens having a negative refractive power, [{'br': None, 'i': f', 'f', 'f≤, '2.00≤(1+3)/2.30;'}, {'br': None, 'i': f', 'f', 'f≤−, '−8.60≤(2+4)/4.80;'}, {'br': None, 'i': R', 'R', 'R', 'R, '−2.10≤(1+2)/(1−2)≤−1.90;'}, {'br': None, 'i': R', 'R', 'R', 'R, '−4.00≤(3+4)/(3−4)≤−1.00; and'}, {'br': None, 'i': R', 'R', 'R', 'R, '2.00≤(7+8)/(7−8)≤30.40,'}], 'wherein the camera optical lens satisfies following conditionswheref denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens;f2 denotes a focal length of the second lens;f3 denotes a focal length of the third lens;f4 denotes a focal length of the fourth lens;R1 denotes a curvature radius of an object side surface of the first lens;R2 denotes a curvature radius of an image side surface of the first lens;R3 denotes a curvature radius of an object side surface of the second lens;R4 denotes a curvature radius of an image side surface of the second lens;R7 denotes a curvature radius of an object side surface of the fourth lens; andR8 denotes a curvature radius of an image side surface of the fourth lens.2. The camera ...

IMAGING LENS AND IMAGING DEVICE

An imaging lens is provided with: a first lens with negative power; a second lens with negative power; a third lens with positive power; and a fourth lens with positive power. The cemented fourth lens is formed from an object side lens with negative power and an image side lens with positive power. The thickness of a resin adhesive layer that bonds the object side lens and the image side lens is 20 μm or greater on the optical axis, and when SgH is the amount of sag in the image side lens surface of the object side lens and SgH is the amount of sag in the object side lens surface of the image side lens. The bonding operation is easy without damage occurring to the cemented surfaces, with a design that takes into account thickness of the resin adhesive layer; therefore various forms of aberration can be corrected. 1. An imaging lens characterized in comprising:a first lens having negative power, a second lens having negative power, a third lens having positive power, an aperture, and a fourth lens having positive power arranged in order from an object side toward an image side,wherein the fourth lens is a cemented lens composed of an object side lens having negative power and an image side lens having positive power, the object side lens and the image side lens each having a cemented surface that is an aspheric surface being convex toward the object side, and [{'br': None, 'i': 'Rs/f', '0.9≦\u2003\u2003(1)'}, {'br': None, 'i': R', 'R, '31≦|32|\u2003\u2003(2),'}], 'the following conditional expressions (1) and (2) are satisfied{'b': 31', '32, 'where Rs represents a radius of curvature of the image side lens surface of the object side lens, f represents a focal point distance of an entire lens system, R represents a radius of curvature of the object side lens surface of the third lens, and R represents a radius of curvature of an image side lens surface of the third lens.'}2. The imaging lens according to claim 1 , characterized in that the following conditional ...

TELEPHOTO LENS

A telephoto lens includes, from an object-side to an image-side: a first lens having a positive refractive power, wherein an object-side surface of the first lens is convex, an image-side surface of the first lens is convex; a second lens having a refractive power; a third lens having a refractive power, wherein the third lens includes plastic material, each of an object-side and an image-side surface of the third lens is aspheric; a fourth lens having a refractive power, wherein an object-side surface of the fourth lens is convex, the fourth lens includes plastic material, and each of the object-side and image-side surfaces of the fourth lens is aspheric; wherein, the telephoto lens satisfies: 0.7 Подробнее

Projection lens, projection device and optically-induced microparticle device

A projection lens, a projection device and an optically-induced microparticle device are provided. The projection lens includes an aperture, a first and a second lens groups. The aperture, the first and the second lens groups are disposed on a projection path of an image. The aperture is between the first and the second lens groups. The first and the second lens groups are suitable for interchanging with each other to switch the magnification ratio. When in a first state, the first lens group is between the object and the aperture and the second lens group is between the aperture and a projection surface, herein the projection lens has a first magnification ratio. When in a second state, the first lens group is between the aperture and the projection surface, and the second lens group is between the object and the aperture, herein the projection lens has a second magnification ratio.

INTERNAL-REFLECTIVE TELECENTRIC LENS SYSTEM

An internal-reflective telecentric lens system includes a first lens assembly, a reflector, and a second lens assembly. The first lens assembly includes a first lens. The second lens assembly includes a second lens, a third lens, and a fourth lens, that are disposed in sequence along a light path. The first lens assembly is configured to receive and output one or more light beams towards the reflector. The reflector is configured to reflect the light beams towards the second lens assembly. The second lens assembly is configured to receive and converge the light beams reflected by the reflector at a diaphragm between the second lens and the third lens, and transmit the light beams past the diaphragm through the third and the fourth lenses for imaging.