Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 3070. Отображено 100.
18-03-2020 дата публикации

Мастер-матрица для изготовления копий дифракционных оптических элементов

Номер: RU0000196869U1
Автор: Михаил Юрьевич Знаменский, Павел Юрьевич Демеев, Танзиля Анваровна Шангараева, Ярослав Константинович Лукашевич
Принадлежит: Акционерное общество "Научно-производственное объединение "Государственный институт прикладной оптики" (АО "НПО ГИПО")

Полезная модель относится к технологической оснастке, применяемой при формировании штриховых структур на оптических поверхностях со сложной геометрической формой, и может быть использована в оптико-электронном приборостроении при массовом изготовлении выпуклых и вогнутых дифракционных решеток с асферическими поверхностями. Мастер-матрица содержит подложку с рабочей асферической поверхностью, на которой сформирована штриховая структура с тонким металлическим слоем. Мастер-матрица дополнительно содержит внутренний и внешний асферические слои из отвержденной полимерной композиции, при этом подложка выполнена со шлифованной сферической поверхностью, отвержденная полимерная композиция внутреннего асферического слоя, расположенного между подложкой и внешним асферическим слоем, содержит наполнитель в виде порошка с размером частиц не более 10 мкм из той же предварительно отвержденной полимерной композиции, а штриховая структура с тонким металлическим слоем сформирована на внешнем асферическом слое. Использование полезной модели позволяет упростить технологию и снизить трудоемкость изготовления мастер-матрицы приблизительно в 13-14 раз за счет исключения операций тонкого шлифования подложки для получения асферической поверхности, полирования этой поверхности и ее прецизионной доводки, а также операции по нарезанию штрихов на асферической поверхности. 1 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 196 869 U1 (51) МПК G02B 5/18 (2006.01) B29D 11/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G02B 5/1847 (2020.01); B29D 11/00769 (2020.01) (21)(22) Заявка: 2019144420, 24.12.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 18.03.2020 (45) Опубликовано: 18.03.2020 Бюл. № 8 1 9 6 8 6 9 R U (56) Список документов, цитированных в отчете о поиске: Справочник технолога-оптика, под. ред. М.А. Окатова, СПб., Политехника, 2004, с. 333-336. RU 2030770 C1, 10.03.1995. US 2013170041 A1, 04.07.2013. US ...

Подробнее
Номер записи: 1
13-09-2012 дата публикации

Talbot Imaging Devices and Systems

Номер: US20120228475A1
Автор: Changhuei Yang, Shuo Pang
Принадлежит: California Institute of Technology CalTech

Talbot imaging systems comprising a Talbot element, a phase gradient generating device, a light detector, and a processor. The Talbot element repeats a Talbot image at a distance from the Talbot element. The phase gradient generating device scans the Talbot image at a plane at the distance from the Talbot element by incrementally changing a phase gradient of a light field incident the Talbot element. As the Talbot image is scanned, the light detector captures time varying data associated with light altered by an object located at the distance from the Talbot element. The processor reconstructs an image of the object based on the time-varying light data.

Подробнее
Номер записи: 2
02-05-2013 дата публикации

OPTICALLY VARIABLE SECURITY DEVICE AND METHOD

Номер: US20130107335A1
Автор: Holmes Brian William
Принадлежит: DE LA RUE INTERNATIONAL LIMITED

A security device comprising at least first and second superposed optically variable effect generating structures (--), each having a surface relief microstructure, the second optically variable effect generating structure being viewable through the first. 1. A security device comprising at least first and second superposed diffractive or holographic optically variable effect generating structures , each structure having a surface relief microstructure , the second optically variable effect generating structure being viewable through the first , wherein the first optically variable effect generating structure includes a discontinuous metallic layer , wherein a dye or pigment is provided between the optically variable effect generating structures , and wherein the replay characteristics of the structures generate a visually integrated image , an optically variable generating effect of the visually integrated image appearing to derive from one optical effect generating structure.2. A device according to claim 1 , wherein the second optically variable effect generating structure includes an opaque claim 1 , reflective layer.3. A device according to claim 1 , wherein the first and second optically variable effect generating structures have been originated by different processes.4. A device according to claim 1 , wherein the first and second surface relief microstructures have been originated by one of dot matrix interferometry claim 1 , lithographic interferometry claim 1 , e-beam lithography and two-step rainbow lithography.5. A device according to claim 1 , wherein the first and second optically variable effect generating structures are laminated together via a laminating adhesive.6. A device according to claim 5 , wherein the dye or pigment comprises a photochromic material claim 5 , a thermochromic material or a luminescent material in the laminating adhesive.7. A device according to claim 1 , further comprising a carrier layer supporting the first and second ...

Подробнее
Номер записи: 3
13-06-2013 дата публикации

Method for designing and method for manufacturing diffraction-grating lens

Номер: US20130145608A1
Автор: Takamasa Ando, Tsuguhiro Korenaga
Принадлежит: Panasonic Corp

A method for designing a diffraction grating lens of the present invention is a method for designing a diffraction grating lens having a diffraction grating composed of a plurality of diffraction zones, the method including the steps of: (a) determining widths of the plurality of diffraction zones; and (b) determining an aspherical coefficient of a diffraction surface on which the diffraction grating is provided while the determined widths of the plurality of diffraction zones are fixed, after the step (a).

Подробнее
Номер записи: 4
30-01-2014 дата публикации

Method for producing substrate having concavity and convexity structure and method for producing organic el element using the same

Номер: US20140030833A1
Автор: Suzushi Nishimura, Yusuke Sato
Принадлежит: JX Nippon Oil and Energy Corp

A method for producing a substrate having an irregular concave and convex surface for scattering light includes: manufacturing a substrate having the irregular concave and convex surface; irradiating the concave and convex surface of the manufactured substrate with inspection light tom a direction oblique to a normal direction and detecting returning light of the inspection light returned from the concave and convex surface by a light-receiving element provided in the normal direction of the concave and convex surface; and judging unevenness of luminance of the concave and convex surface by an image processing device based on light intensity of the returning light received. An organic EL element which includes a diffraction-grating substrate having an irregular concave and convex surface is produced with a high throughput.

Подробнее
Номер записи: 5
07-01-2016 дата публикации

DISPLAY

Номер: US20160003990A1
Автор: HAYASHI Takayoshi, SHINODA Koichi, TSUKAHARA Toshiyuki
Принадлежит: TOPPAN PRINTING CO., LTD.

A display includes a transparent base having one surface on which a structure-forming layer, a light reflection layer and a protective layer are sequentially laminated. The light reflection layer reflects part of the incident light, while transmitting therethrough the rest of the light. The structure-forming layer includes a plurality of structure areas, and each of the plurality of structure areas is formed of a concavo-convex structure. 1. A display , comprising:a transparent base having one surface on which a structure-forming layer, a light reflection layer, and a protective layer are sequentially laminated,with the light reflection layer reflecting a part of light passing therethrough, while transmitting therethrough another part of the light; andthe structure-forming layer includes a plurality of structure areas that are formed of a concavo-convex structure.2. The display of claim 1 , wherein the plurality of structure areas are configured to have differences in at least one of the following parameters: height claim 1 , cycle claim 1 , width of convexity claim 1 , and width of concavity of the concavo-convex structure claim 1 , so that light transmitted through the plurality of structure areas has different dominant wavelengths.3. The display of claim 1 , wherein the plurality of structure areas are configured to display at least one image claim 1 , selected from mutually different designs claim 1 , letters claim 1 , and numerals.4. The display of claim 1 , wherein the structure-forming layer includes a non-structure area where no concavo-convex structure is formed claim 1 , with the structure area having a transmittance of more than about 20% and the non-structure area having a transmittance of not more than about 20%.5. The display of claim 1 , wherein the plurality of structure areas includes concavo-convex structures having different heights.6. The display of claim 1 , wherein the concavo-convex structure includes two kinds of different structures claim 1 ...

Подробнее
Номер записи: 6
07-01-2016 дата публикации

PHASE GRATINGS WITH ODD SYMMETRY FOR HIGH-RESOLUTION LENSLESS OPTICAL SENSING

Номер: US20160003994A1
Автор: Gill Patrick R., Stork David G.
Принадлежит: RAMBUS INC.

Image-sensing devices include odd-symmetry gratings that cast interference patterns over a photodetector array. Grating features offer considerable insensitivity to the wavelength of incident light, and also to the manufactured distance between the grating and the photodetector array. Photographs and other image information can be extracted from interference patterns captured by the photodetector array. Images can be captured without a lens, and cameras can be made smaller than those that are reliant on lenses and ray-optical focusing. 1. A sensing device comprising:a photodetector array; anda phase grating overlying the photodetector array and defining a transverse plane, the phase grating producing, for light in a wavelength band of interest incident the grating and normal to the transverse plane of the grating, normally arranged curtains of minimum intensity between the phase grating and the photodetector array, each of the curtains of minimum intensity created by destructive phase interference between first phase-grating features located to one side of the curtain and paired second phase-grating features located to the other side of the curtain.2. The sensing device of claim 1 , the phase grating producing claim 1 , for light in the wavelength band of interest incident the grating at an acute angle relative to the transverse plane claim 1 , second curtains of minimum intensity between the phase grating and the photodetector array.3. The sensing device of claim 2 , wherein the second curtains are arranged at a second acute angle to the transverse plane.4. The sensing device of claim 1 , wherein each of the first phase-grating features induces a respective first phase-delay to the incident light claim 1 , each of the paired second phase-grating features induces a respective paired second phase-delay to the incident light claim 1 , the first and second paired phase-delays differing by approximately half a wavelength claim 1 , plus an integer number of wavelengths ...

Подробнее
Номер записи: 7
07-01-2016 дата публикации

HEAD-UP DISPLAY DEVICE

Номер: US20160004075A1
Автор: ANDO Hiroshi, Fujikawa Takayuki, YAMAGUCHI Masayuki
Принадлежит:

An HUD device includes a laser scanner that projects laser light carrying a display image, and a screen member that has a plurality of optical elements arrayed in the form of a grating, and diffuses laser light which emanates from the laser scanner and enters the optical elements toward a projection surface. The optical elements have curved surfaces, which take on a convexly curved form as a common curved form, formed as their faces, and diffuse laser light which is emitted to the projection surface from the curved surfaces. The optical elements are configured so that an element width differs in at least one array direction of the array of the grating between adjoining optical elements. 1. A head-up display device that projects a display image onto a projection surface of a moving entity and thus displays a virtual image of the display image so that the virtual image can be discerned inside the moving entity , comprising:a projector that projects laser light carrying the display image; anda screen member that has a plurality of optical elements arrayed in a form of a grating, and diffuses and introduces the laser light, which emanates from the projector and enters the optical elements, toward the projection surface, whereinthe optical elements have curved surfaces, which are either convexly curved or concavely curved and take on a common curved form, as faces of the optical elements, and diffuse the laser light which is emitted to the projection surface from the curved surfaces; andthe optical elements are configured so that an element width differs between the optical elements adjoining in at least one array direction in an array of the grating.2. The head-up display device according to claim 1 , whereinthe optical elements are configured so that the element width in one of array directions in the array of the grating differs between the optical elements adjoining in the one of the array directions, and the element width in another one of the array directions in ...

Подробнее
Номер записи: 8
04-01-2018 дата публикации

Method and Master for Producing a Volume Hologram

Номер: US20180004156A1
Автор: Achim Hansen, Andreas Schilling, Norbert Lutz, Wayne Robert Tompkin
Принадлежит: Leonhard Kurz Stiftung and Co KG, OVD KINEGRAM AG

A method for producing a volume hologram with at least one first area in a first color and at least one second area in a second color includes, providing a volume hologram layer made of a photopolymer; arranging a master with a surface structure on the volume hologram layer; exposing the master using coherent light, wherein light which is incident on at least one first partial area of the surface of the master is diffracted or reflected in the direction of the at least one first area of the volume hologram layer and light which is incident on at least one second partial area of the surface of the master is diffracted or reflected in the direction of the at least one second area of the volume hologram, and wherein the light diffracted or reflected by the first and second partial areas differs in at least one optical property.

Подробнее
Номер записи: 9
03-01-2019 дата публикации

Large-Field-of-View Waveguide Supporting Red, Green, and Blue in One Plate

Номер: US20190004219A1
Автор: Tervo Jani Kari Tapio
Принадлежит:

An optical device for combining RGB optical signals in a single waveguide. The device includes a plurality of DOEs. A first DOE is configured to receive an optical signal at input propagation angles and to diffract the optical signal based on spectrum such that predominately one spectrum of light is diffracted in a first direction and path and predominately a second spectrum of light is diffracted in a second different direction and path. The first DOE is configured to diffract light into a second DOE. The second DOE is configured to diffract light into a third DOE. The third DOE is configured to diffract light into an eye box keeping output propagation angles substantially parallel to the input propagation angles. A summation of grating vectors for each of the paths is substantially equal to zero. 1. An optical device for combining RGB optical signals in a single waveguide , the device comprising a plurality of DOEs including:a first DOE configured to receive an optical signal at input propagation angles and to diffract the optical signal based on spectrum such that predominately one spectrum of light is diffracted in a first direction and predominately a second spectrum of light is diffracted in a second different direction such that different portions of optical signal take different paths, including at least two different paths;a second DOE, wherein the first DOE is configured to diffract light into the second DOE;a third DOE, wherein the second DOE is further configured to diffract light into the third DOE;wherein the second and third DOE are configured to cause expansions that are substantially non-parallel;wherein the third DOE is configured to diffract light into an eye box keeping output propagation angles within some predetermined threshold of the input propagation angles; andwherein the plurality of DOEs are associated with grating vectors and wherein a summation of grating vectors for each of the paths in the at least two different paths is substantially ...

Подробнее
Номер записи: 10
07-01-2021 дата публикации

OPTICAL COMPONENT HAVING VARIABLE DEPTH GRATINGS AND METHOD OF FORMATION

Номер: US20210005461A1
Автор: Evans Morgan, Hautala John, MEYER TIMMERMAN THIJSSEN Rutger, Olson Joseph C.
Принадлежит: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.

An optical grating component may include a substrate, and an optical grating, the optical grating being disposed on the substrate. The optical grating may include a plurality of angled structures, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, wherein the plurality of angled structures are arranged to define a variable depth along a first direction, the first direction being parallel to the plane of the substrate. 2. The optical grating of claim 1 , wherein the plurality of angled structures extend along a second direction claim 1 , perpendicular to the first direction claim 1 , and wherein a grating height of an angled structure along the second direction is uniform.3. The optical grating component of claim 2 ,wherein the optical grating is a first optical grating,the optical grating component further comprising a second optical grating, the second optical grating comprising a second plurality of angled structures, disposed at a second non-zero angle of inclination with respect to the perpendicular to the plane of the substrate, wherein the second plurality of angled structures are arranged to define a second variable depth along the second direction.4. The optical grating component of claim 1 , wherein the optical grating comprises silicon oxide claim 1 , silicon nitride claim 1 , or a glass.5. The optical grating component of claim 1 , wherein the optical grating comprises a grating height in a range of 100 nm to 1000 nm claim 1 , wherein the optical grating comprises a grating height variation of 10%-40%.6. The optical grating component of claim 1 , wherein the optical grating is disposed in a grating layer claim 1 , the optical grating component further comprising an etch stop layer claim 1 , disposed between the substrate and the grating layer.7. The optical grating component of claim 6 , wherein the etch stop layer comprises a thickness of 10 nm to 100 nm.8. The optical grating component of claim 6 , ...

Подробнее
Номер записи: 11
02-01-2020 дата публикации

FOVEATED NEAR TO EYE DISPLAY SYSTEM USING A COMPUTATIONAL FREEFORM LENS VIA SPATIAL LIGHT MODULATION OF A LASER PROJECTED IMAGE ONTO AN EMISSIVE FILM

Номер: US20200007838A1
Автор: Stafford Jeffrey R.
Принадлежит:

A projection system projects images onto a projection surface in, for example, a computer game head-mounted display (HMD). The light is projected through a spatial light modulator that contains a phase-only image of a Freeform Fourier Lens that is a combination of a Fresnel lens, an X-phase grating, a Y-phase grating, and a radial grating. The freeform lens is a condensing freeform lens that causes the gradual shrinking of portions of the laser-projected image, decreasing the perceived pixel pitch in at least one foveal area on the projection surface compared to a non-modulated laser image. The center positions of the Fresnel lens and radial grating can be changed in the X and Y axes, moving the condensed foveal areas in accordance with eye tracking of the user. In effect, the system projects a Foveated image that contains variable pixel pitch such that a user perceives a higher visual acuity in his gaze direction to the projected surface. 1. An apparatus comprising:a projection system configured to project an image onto a projection surface through a spatial light modulator operably associated with a phase-only image of a Freeform Fourier Lens (FFL), the FFL comprising a Fresnel lens, an X-phase grating, a Y-phase grating, and a radial grating whereinthe FFL causes gradual shrinking of portions of images from the projection system, decreasing perceived pixel pitch in at least one foveal area on the projection surface,the gratings being configurable to move positions of the at least one foveal area within the image based on a user's eye gaze onto the projection surface.2. The apparatus of claim 1 , wherein the projection system and spatial light modulator are supported in a head-mounted display (HMD) or a video monitor.3. The apparatus of claim 1 , comprising at least one distortion/adjustment assembly configured to distort the image projected to the projection surface in accordance with a projection angle relative to the projection surface and a shape of the ...

Подробнее
Номер записи: 12
10-01-2019 дата публикации

Display Device and Display Method

Номер: US20190011716A1
Автор: CHEN Xiaochuan, LU Pengcheng, WANG Qian, Yang Ming, ZHAO Wenqing
Принадлежит: BOE Technology Group Co., Ltd.

A display device and a display method are provided, and the display device includes: a first panel which includes a plurality of light-blocking units and a plurality of pixels, each of the light-blocking units being between the pixels adjacent to each other; and a second panel which includes a first light-emitting plate provided with a plurality of light-emitting units, a distance from the light-emitting units to the first panel being one of H1=BS/(L−B), H2=(P−B)S/(L−P+B) and H3=PS/(L−P), in which B is a width of each of the light-blocking units between the pixels adjacent to each other, S is a viewing distance for a viewer, L is a pupillary distance between a left eye and a right eye of the viewer, and P is a pitch of the pixels of the first panel. 1. A display device , comprising:a first panel, wherein the first panel comprises a plurality of light-blocking units and a plurality of pixels, and each of the light-blocking units is between the pixels adjacent to each other; anda second panel, wherein the second panel comprises a first light-emitting plate, the first light-emitting plate comprises a plurality of light-emitting units, and a distance from the light-emitting units of the first light-emitting plate to the first panel is one of a first distance H1=BS/(L−B), a second distance H2=(P−B)S/(L−P+B) and a third distance H3=PS/(L−P),whereinB is a width, between the pixels adjacent to each other, of each of the light-blocking units, B0−b≤B≤B0+b, B0 is an optimum width of each of the light-blocking units between the pixels adjacent to each other, b is a maximum allowable deviation of each of the light-blocking units relative to the B0, and b/B0≤50%;S is a viewing distance for a viewer, and S0−s≤S≤S0+s, S0 is an optimum viewing distance, s is a maximum allowable back-or-forth deviation relative to the optimum viewing distance S0, and s/S0≤20%;L is a pupillary distance between a left eye and a right eye of the viewer, L0−1≤L≤L0+l, L0 is an optimum pupillary distance, ...

Подробнее
Номер записи: 13
10-01-2019 дата публикации

HOLOGRAPHIC DISPLAY PANEL, HOLOGRAPHIC DISPLAY DEVICE AND DISPLAY METHOD THEREFOR

Номер: US20190011881A1
Автор: CHEN Xiaochuan, Dong Xue, Gu Xin, Guan Feng, Tan Jifeng, Wang Meili, Wang Wei
Принадлежит:

A holographic display panel comprises a plurality of display units, each display unit comprises at least two adjacent pixels, each pixel comprises: a plurality of sub-pixels; and a plurality of phase plates. Diffractive angles of light coming out of the phase plates corresponding to the sub-pixels in a same pixel are the same, a diffractive angle of first light coming out of the phase plates corresponding to a first pixel in one of the display units is different from a diffractive angle of second light coming out of the phase plates corresponding to a second pixel that is different from the first pixel but in the same display unit, and a reverse extension line of the first light and a reverse extension line of the second light intersect at an image plane position. 1. A holographic display panel , comprising a plurality of display units , each of the plurality of display units comprising:at least two adjacent pixels each comprising a plurality of sub-pixels; anda plurality of phase plates, each sub-pixel of the plurality of sub-pixels corresponding to one of the plurality of phase plates in a light exit direction of the sub-pixel, the plurality of phase plates being configured to control diffractive angles of light coming out of the plurality of phase plates,wherein diffractive angles of light coming out of the phase plates corresponding to the sub-pixels in one same pixel are the same, and a diffractive angle of first light coming out of the phase plates corresponding to a first pixel in one of the plurality of display units is different from a diffractive angle of second light coming out of the phase plates corresponding to a second pixel that is different from the first pixel and is in the same display unit as the first pixel, and a reverse extension line of the first light and a reverse extension line of the second light intersect at an image plane position.2. The holographic display panel according to claim 1 , wherein the plurality of display units are divided ...

Подробнее
Номер записи: 14
15-01-2015 дата публикации

DIFFRACTION GRATING AND PRODUCTION METHOD THEREOF

Номер: US20150015957A1
Автор: Kawasaki Kenji, Miyauchi Akihiro, Ogino Masahiko
Принадлежит: HITACHI HIGH-TECHNOLOGIES CORPORATION

The present invention has an object of providing a diffraction grating excellent in surface precision and allowing its miniaturization and weight reduction and a method for manufacturing the same. The present invention comprises: a glass substrate having a thickness of 0.5 mm to 8 mm; a resin-made microstructure body having an unevenness pattern and formed on one surface of the glass substrate; and a flat resin layer formed on the other surface of the glass substrate. Even if the glass substrate has surface precision of λ/2 or greater, the replica of the diffraction grating, in which the microstructure body is not influenced by the surface precision of the glass substrate and which is excellent in surface precision, can be manufactured by the flatness of the resin layer. In addition, since the glass substrate can be made thin, the miniaturization and weight reduction of the diffraction grating can be achieved. 13-. (canceled)4. A method for manufacturing a diffraction grating in which a microstructure body having an unevenness pattern is formed on a front surface of a glass substrate , the method comprising:a step of holding and pressing the glass substrate, which has a thickness of 0.5 mm to 8 mm and has first light curing resins coated on both surfaces thereof, between a pair of flat plates having surface precision of λ/2 or less and curing the first light curing resins to form resin layers on the both surfaces of the glass substrate;a step of coating a front surface of one of the resin layers of the glass substrate with a second light curing resin and pressing an original plate having the unevenness pattern onto the second light curing resin to fill the second light curing resin in the unevenness pattern of the original plate;a step of curing the second light curing resin; anda step of separating the original plate from the second light curing resin to form the microstructure body having the unevenness pattern on one of the surfaces of the glass substrate.5. The ...

Подробнее
Номер записи: 15
19-01-2017 дата публикации

SNAPSHOT SPECTRAL IMAGING BASED ON DIGITAL CAMERAS

Номер: US20170016768A1
Автор: Averbuch Amir, Golub Michael, NATHAN Menachem
Принадлежит:

Snapshot spectral imagers comprise an imaging lens, a dispersed image sensor and a restricted isometry property (RIP) diffuser inserted in the optical path between the source image and the image sensor. The imagers are used to obtain a plurality of spectral images of the source object in different spectral bands in a single shot. In some embodiments, the RIP diffuser is one dimensional. An optional disperser may be added in the optical path, to provide further dispersion at the image sensor. In some embodiments, all imager components except the RIP diffuser may be part of a digital camera, with the RIP diffuser added externally. In some embodiments, the RIP diffuser may be included internally in a digital camera. 1. A spectral imaging system , comprising:a) a first imaging lens;b) a first image sensor;c) a single phase transmitting diffractive optical element positioned in a first imaging path extending between a source object and the first image sensor through the first imaging lens, the single phase transmitting diffractive optical element designed to disperse light originating from the source object to form, in a single shot, a diffused-dispersed image of the source object on at least a part of the first image sensor; andd) a processor configured to process the diffused-dispersed image into a plurality of spectral images of the source object.2. The spectral imaging system of claim 1 , wherein the single phase transmitting diffractive optical element is positioned at a system aperture.3. The spectral imaging system of claim 1 , wherein the single phase transmitting diffractive optical element is positioned at a position closer to a system aperture than to the first image sensor.4. The spectral imaging system of claim 1 , wherein the single phase transmitting diffractive optical element is positioned at a position closer to an entrance pupil of the first imaging lens than to the first image sensor.5. The spectral imaging system of claim 1 , wherein the single phase ...

Подробнее
Номер записи: 16
17-01-2019 дата публикации

NANO-GAP GRATING DEVICES WITH ENHANCED OPTICAL PROPERTIES AND METHODS OF FABRICATION

Номер: US20190018172A1
Автор: Basuray Sagnik, Bhatnagar Kunal, Cornish Peter, Gangopadhyay Keshab, Gangopadhyay Shubhra, Ghosh Arnab, Korampally Venu, Mathai Joseph, Menke Drew Edwin, Pathak Avinash, Wood Aaron
Принадлежит:

A method of producing a grating structure comprises the steps of forming a stamp from flexible plastic material, the stamp including a negative of a periodic grating pattern on a first surface; forming an ink by applying a polymer film to the stamp, the ink including a first surface and an opposing second surface, wherein the first surface of the ink contacts the first surface of the stamp such that the ink retains a positive of the periodic grating pattern; placing the ink and the stamp on a substrate such that the second surface of the ink contacts an upper surface of the substrate; and removing the stamp from the ink by applying a tensional force to one edge of the stamp. 1. A grating structure comprising: 'a first surface with a plurality of grating elements positioned adjacent one another, each grating element including a longitudinal tip, a longitudinal plateau, and a longitudinal nanogap, and', 'a base layer positioned on the substrate, the base layer including'}a contiguous first functional layer conformally covering the base layer producing an enhanced fluorescence of a sample,wherein the first functional layer includes a plurality of nanospurs forming a plurality of peaks abutting one another along the length of the longitudinal tip producing additional localized electromagnetic field enhancement.2. The grating structure of claim 1 , wherein the longitudinal nanogap has a width ranging from approximately 10 nm to approximately 30 nm and the longitudinal tip has a width ranging from approximately 10 nm to approximately 30 nm.3. The grating structure of claim 1 , wherein the first functional layer is metallic claim 1 , and wherein the first functional layer is approximately 100 nm thick.4. The grating structure of claim 1 , wherein the first functional layer is made of silver.5. The grating structure of claim 1 , wherein the first functional layer is made of a dielectric claim 1 , and wherein the first functional layer is between approximately 100 nm and ...

Подробнее
Номер записи: 17
17-01-2019 дата публикации

PRIVACY DISPLAY AND DUAL-MODE PRIVACY DISPLAY SYSTEM

Номер: US20190018186A1
Автор: Fattal David A.
Принадлежит:

A privacy display provides a private image exclusively visible within a viewing cone of a viewbox. The privacy display includes a light guide to guide light, a diffraction grating configured to diffractively couple out a portion of the guided light as diffractively coupled-out light and to direct the diffractively coupled-out light into the viewbox, and a light valve array configured to modulate the diffractively coupled-out light to provide the private image. An extent of the viewbox is determined by a collimation factor of the guided light. A dual-mode privacy display system further includes a broad-angle backlight configured to provide broad-angle light to separately provide a public image visible both inside and outside the viewing cone. The private image may be provided in a privacy mode and the public image may be provided in a public mode of the dual-mode privacy display system. 1. A privacy display comprising:a light guide configured to guide light according to a collimation factor;a diffraction grating at a surface of the light guide, the diffraction grating being configured to diffractively couple out a portion of the guided light from the light guide as diffractively coupled-out light and to direct the diffractively coupled-out light into a viewbox; anda light valve array configured to modulate the diffractively coupled-out light to provide a private image,wherein an extent of the viewbox is determined by the collimation factor, the private image being configured to be exclusively visible within a viewing cone of the viewbox to provide viewing privacy.2. The privacy display of claim 1 , wherein principal light beams of the diffractively coupled-out light are directed toward a middle of the viewbox.3. The privacy display of claim 1 , wherein the viewbox is a two-dimensional viewbox located in a plane parallel to the light guide surface claim 1 , and wherein the diffraction grating comprises a plurality of curved diffractive features configured to direct ...

Подробнее
Номер записи: 18
16-01-2020 дата публикации

SYSTEM AND METHOD FOR OPTIMALLY FORMING GRATINGS OF DIFFRACTED OPTICAL ELEMENTS

Номер: US20200018981A1
Автор: Evans Morgan, Kurunczi Peter, Olson Joseph, Thijssen Rutger Meyer Timmerman
Принадлежит: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.

Optical grating components and methods of forming are provided. In some embodiments, a method includes providing an etch stop layer atop a substrate, and providing an optical grating layer atop the etch stop layer. The method may further include providing a patterned mask layer over the optical grating layer, and etching the optical grating layer and the patterned mask layer to form an optical grating in the optical grating layer. The optical grating may include a plurality of angled components, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, wherein the etching forms an area of over-etch in the etch stop layer between the plurality of angled components. 1. A method of forming an optical grating component , comprising:providing an etch stop layer atop a substrate;providing an optical grating layer atop the etch stop layer;providing a patterned mask layer over the optical grating layer; andetching the optical grating layer and the patterned mask layer to form an optical grating in the optical grating layer, wherein the optical grating comprises a plurality of angled components, disposed at a non-zero angle of inclination with respect to a perpendicular to a plane of the substrate, and wherein the etching causes an area of over-etch to be formed in the etch stop layer.2. The method of claim 1 , further comprising removing a healing and a footing along the plurality of angled components.3. The method of claim 1 , wherein an angle of a first sidewall of the plurality of angled components is substantially the same as an angle of a second sidewall of the plurality of angled components.4. The method of claim 3 , wherein the first and second sidewalls are approximately parallel to one another.5. The method of claim 1 , wherein the etching comprises an angled reactive ion etch into the optical grating layer.6. The method of claim 1 , wherein the etching is performed by a ribbon reactive ion beam claim 1 , wherein the ...

Подробнее
Номер записи: 19
22-01-2015 дата публикации

Diffraction Grating and Method for the Production Thereof

Номер: US20150022893A1
Автор: Fuchs Frank, Kley Ernst-Bernhard, Zeitner Uwe D.
Принадлежит:

A diffraction grating includes a grating area having, in a direction running parallel to a substrate, a periodic arrangement of first areas with a first grating material and second areas with a second grating material. The first grating material and the second grating material are solid materials with different indices of refraction. A reflection-reducing or reflection-increasing layer system having at least two layers with different indices refraction. The reflection-reducing or reflection-increasing layer system is arranged on one side of the grating area facing away from the substrate, and an additional layer system having at least two layers with different indices of refraction is arranged between the substrate and the grating area. A method for producing the diffraction grating is also specified. 112-. (canceled)13. A diffraction grating , comprising:a substrate;a grating region comprising, in a direction extending parallel to the substrate, a periodic arrangement of first regions having a first grating material and second regions having a second grating material, wherein the first grating material and the second grating material are solid materials having different indices of refraction;a first layer system arranged on a side of the grating region facing away from the substrate, wherein the first layer system comprises a reflection-reducing or reflection-increasing layer system that has a plurality of layers having different indices of refraction; anda further layer system arranged between the substrate and the grating region and that has a plurality of layers having different indices of refraction.14. The diffraction grating according to claim 13 , wherein the diffraction grating is a transmission grating claim 13 , and wherein the first layer system and the further layer system are each reflection-reducing layer systems.15. The diffraction grating according to claim 13 , wherein the diffraction grating is a reflection grating and wherein the first layer ...

Подробнее
Номер записи: 20
16-01-2020 дата публикации

METHOD AND DEVICE FOR GENERATING AND DECODING SPECTRALLY ENCODED IMAGES

Номер: US20200021784A1
Автор: GRUSCHE Sascha
Принадлежит:

A method for generating a spectrally encoded image from an original image includes at least one first transformation step, in which at least one first original image parameter is encoded into at least one first image parameter, which is dependent on at least one spectral coordinate of the spectrally encoded image, wherein the method includes at least one second transformation step, in which at least one second original image parameter is encoded into at least one second image parameter that is dependent on the spectral coordinate of the spectrally encoded image. 1. A method for generating a spectrally encoded image from an original image , with at least one first transformation step , in which at least one first original image parameter is encoded into at least one first image parameter , which is dependent on at least one spectral coordinate of the spectrally encoded image , wherein the original image comprises at least one first partial image , which is encoded into a first basis image and comprises a first spectral band , whereinthe first original image parameter is a light intensity distribution that is dependent on a location coordinate of the original image and extends over the first spectral band, whereinthe first original image parameter implements an image line of the first partial image of the original image, and whereinthe first image parameter is a light intensity distribution that is dependent on the spectral coordinate of the spectrally encoded image in the first spectral band, whereinthe spectrally encoded image is generated on the screen via a projection onto the screen and/or is coupled into the screen sidewise and/or from below, and whereinthe spectrally encoded image is spatially at least substantially one-dimensional, comprising at least one second transformation step, in which at least one second original image parameter is encoded into at least one second image parameter that is dependent on the spectral coordinate of the spectrally encoded ...

Подробнее
Номер записи: 21
26-01-2017 дата публикации

COLOR IMAGE DISPLAY DEVICES COMPRISING STRUCTURAL COLOR PIXELS THAT ARE SELECTIVELY ACTIVATED AND/OR DEACTIVATED BY MATERIAL DEPOSITION

Номер: US20170023711A1
Автор: Jiang Hao, KAMINSKA Bozena
Принадлежит:

A color image display device comprising arrays of structural color pixels, where said structural color pixels may be formed on a single substrate layer or multiple substrate layers and are patterned by selective material deposition to display a color image in accordance with input color images or patterns. The structural color pixels comprise a plurality of microstructures and/or nanostructures, including without limitation, diffraction gratings, sub-wavelength structures, to display colors in red, green, blue in RGB color space or cyan, magenta, yellow in CMY color space. Examples include methods of activating and/or deactivating structural pixels using selective material deposition onto at least one layer of the color display device to form a color image. Further examples include product labels, authentication devices and security documents carrying customized or personalized information and methods for their manufacture. 1. A color image display device , comprising:a generic substrate comprising a pixel layer which is generic to any pattern, said pixel layer including at least one type of structural pixels, each pixel defined by at least one microstructure or nanostructure having at least one specific optical property including a specific optical band or a specific color; andan ink material selectively deposited onto individual pixels of the pixel layer in accordance with a pattern to activate or deactivate individual of said pixels to form a color image.2. The color image display device as claimed in claim 1 , wherein the pixel layer further comprises pixel sets claim 1 , each pixel set being defined by a subset of the subpixels exclusive to the other pixel sets claim 1 , wherein at least two of the subpixels in each pixel set have a different specific optical property.3. The color image display device as claimed in claim 2 , wherein the subpixels for one of the pixel sets have a same respective at least one specific optical property as the subpixels for another ...

Подробнее
Номер записи: 22
24-01-2019 дата публикации

Light redirecting film

Номер: US20190025480A1
Автор: Chen-Kuan Kuo, Cyun-Tai HONG, Fung-Hsu Wu
Принадлежит: BenQ Materials Corp

A light redirecting film in a sandwich-laminated structure is provided. The light redirecting film comprises a first layer, a second layer; and an intermediate layer sandwiched between the first layer and the second layer. The intermediate layer includes a first grating surface having a plurality of first gratings extending in a first grating direction and a second grating surface opposite to the first grating surface having a plurality of second gratings extending in a second grating direction, wherein the first grating direction and the second grating direction cross each other at an angle of 90°±10°, and the first grating surface and the second grating surface of the intermediate layer are gap-filled and planarized with the first layer and the second layer respectively to generate the light redirecting film.

Подробнее
Номер записи: 23
24-01-2019 дата публикации

Light redirecting film and method for manufacturing the same

Номер: US20190025605A1
Автор: Chen-Kuan Kuo, Chuen-Nan Shen, Chung-Hung Chien, Cyun-Tai HONG, Fung-Hsu Wu, Hung-Jiun Shieh, Tsung-Chi Yeh
Принадлежит: BenQ Materials Corp

A light redirecting film and a method for manufacturing the same are provided. The light redirecting film comprises a substrate, a first diffraction grating layer of a first curable resin on the substrate and a second diffraction grating layer of a second curable resin on the first diffraction grating layer. Wherein the grating directions of the first diffraction grating layer and the second diffraction grating layer cross each other at an angle of 90±10°, and the difference of the refractive index of the first curable resin and the second curable resin is no less than 0.1 and no more than 0.3.

Подробнее
Номер записи: 24
24-01-2019 дата публикации

OPTICAL FILM

Номер: US20190025630A1
Автор: Cheng Meng-Chia, Chou Meng-Chieh, Hong Cyun-Tai, KUO Chen-Kuan, LIN Chia-Feng, LIN MENG-JIE, Shen Chuen-Nan, Wu Fung-Hsu
Принадлежит:

An optical film includes a first diffraction layer, a second diffraction layer, and a cover layer. The first diffraction layer includes a plurality of first diffraction gratings arranged in the same direction on a surface thereof. The second diffraction layer includes a plurality of second diffraction gratings arranged in the same direction gap-filled the first diffraction gratings of the first diffraction layer, wherein the directions of the first diffraction gratings and the second diffraction gratings are parallel to each other. The cover layer is formed on the second diffraction gratings of the second diffraction layer. At least one of the first diffraction layer, the second diffraction layer and the cover layer contains dyes, and therefore, the optical film can reduce the light leakage defect of a conventional liquid crystal display in a large viewing angles and make the liquid crystal display have uniform dark-state images and colorful images. 1. An optical film , comprising:a first diffraction layer with a upper surface and a lower surface opposite to each other, including a plurality of first diffraction gratings arranged in the same direction on the upper surface thereof;a second diffraction layer including a plurality of second diffraction gratings arranged in the same direction and gap-filled in and on the first diffraction gratings of the first diffraction layer, wherein the directions of the first diffraction gratings and the second diffraction gratings are parallel to each other; anda cover layer formed on the second diffraction layer;wherein at least one of the first diffraction layer, the second diffraction layer or the cover layer comprises dyes.2123123. The optical film according to claim 1 , wherein the first diffraction layer has a first refraction index of n claim 1 , the second diffraction layer has a second refraction index of n claim 1 , the cover layer has a third refraction index of n claim 1 , and n claim 1 , n and n are all in the range ...

Подробнее
Номер записи: 25
24-01-2019 дата публикации

OPTICAL FILM

Номер: US20190025631A1
Автор: Cheng Meng-Chia, Hong Cyun-Tai, KUO Chen-Kuan, LIN Chia-Feng, LIN MENG-JIE, Shen Chuen-Nan
Принадлежит:

The invention provides an optical film for improving image quality of a liquid crystal display comprising: a light directing structure layer, a first filling layer, a plurality of first diffraction gratings and a second filling layer. The light directing structure layer comprises a plurality of light directing micro structures, wherein the ratio of height to width of each light directing micro structure is in the range of 1.5 to 6. The first filling layer is disposed on the light directing structure layer, and the refractive index of the first filling layer and the light directing structure layer are different. The first diffraction gratings along with a first direction are formed on the first filling layer. The second filling layer is disposed on the first diffraction gratings and the refractive index of the second filling layer and the first diffraction gratings are different. 1. An optical film comprising:a light directing structure layer comprising a plurality of light directing micro structures, wherein the ratios of height to width of the light directing micro structures are in the range of 1.5 to 6;a first filling layer disposed on the light directing micro structures and covering the light directing micro structures, wherein the refractive index of the first filling layer and the light directing structure layer are different;a plurality of first diffraction gratings along with first direction formed on the first filling layer; anda second filling layer disposed on the first gratings, wherein the refractive index of the second filling layer and the first diffraction gratings are different.2. The optical film according to claim 1 , wherein the heights of the light directing micro structures are independently in the range of 15 μm to 30 μm.3. The optical film according to claim 1 , wherein the widths of the light directing micro structures are independently in the range of 5 μm to 9 μm.4. The optical film according to claim 1 , wherein the gaps between adjacent ...

Подробнее
Номер записи: 26
24-01-2019 дата публикации

OPTICAL FILM

Номер: US20190025632A1
Автор: Cheng Meng-Chia, Chou Meng-Chieh, Hong Cyun-Tai, KUO Chen-Kuan, LIN Chia-Feng, LIN MENG-JIE, Shen Chuen-Nan, Wu Fung-Hsu
Принадлежит:

An optical film includes a first diffraction layer, a second diffraction layer, and a cover layer. The first diffraction layer includes a plurality of first diffraction gratings arranged in a direction on a surface thereof. The second diffraction layer is filled in the gap of the first diffraction gratings of the first diffraction layer and forms a plurality of second diffraction gratings arranged in a direction on the first diffraction layer, wherein the directions of the first diffraction gratings and the second diffraction gratings are parallel to each other. The cover layer fills and planarizes the second diffraction gratings of the second diffraction layer. The optical film can reduce the light leakage defect of a conventional liquid crystal display in a wide viewing angle and make the liquid crystal display have a uniform dark-state image and color image quality. 1. An optical film comprising:a first diffraction layer with a upper surface and a lower surface, including a plurality of first diffraction gratings arranged in the same direction on the upper surface thereof;a second diffraction layer with a plurality of second diffraction gratings arranged in the same direction and gap-filled in and on the first diffraction gratings of the first diffraction layer, wherein the directions of the first diffraction gratings and the second diffraction gratings are parallel to each other; anda cover layer formed on the second diffraction gratings of the second diffraction layer to fill and planarize the second diffraction gratings of the second diffraction layer.2123123. The optical film according to claim 1 , wherein the first diffraction layer has a first refraction index of n claim 1 , the second diffraction layer has a second refraction index of n claim 1 , the cover layer has a third refraction index of n claim 1 , and n claim 1 , n and n are all in the range of 1.4 to 1.7.3213. The optical film according to claim 2 , wherein the second refraction index of n is ...

Подробнее
Номер записи: 27
23-01-2020 дата публикации

HANDHELD PROJECTOR AND GAMING AID FOR TABLETOP GRID MAT

Номер: US20200025984A1
Автор: Canfield Chris, Newman Clifford
Принадлежит:

A handheld projector for visually defining an event zone on a grid mat of a tabletop game to obviate the need to manually make proximity calculations during game play to determine whether players indicated on a game board are located in sufficient proximity to a virtual event to be effected. 1. A handheld projector and tabletop gaming aid comprising:an outer housing defining two recesses: a circular projector beam recess and a rectangular viewfoil recess through which one more detachable viewfoils insert;an electronic projector for projecting a beam of light;one or more detachable viewfoils disposed between the projector and the projector beam recess, each viewfoil comprising a transparent sheet bearing an image consisting of an event zone defined only by a plurality of two dimensional sectors;wherein the image is exclusively associated with a virtual event occurring during gameplay;wherein, the image of the event zone is projected onto a grid mat of a tabletop game to visually define boundaries of an event zone on the grid mat.2. The handheld projector of claim 1 , further comprising a carousel having a plurality of viewfoils claim 1 , the carousel adapted to rotate axially within the projector.3. The handheld projector of claim 1 , wherein the housing is spherical for improved ergonomics.4. The handheld projector of claim 1 , further comprising a tripod for mounting the handheld projector.5. The handheld projector of claim 1 , further comprising a plurality of projectors claim 1 , each projector disposed behind a detachable viewfoil.6. A handheld projector and tabletop gaming aid comprising:an outer housing defining a circular projector beam recess;an electronic projector for projecting a beam of light;one or more viewfoils disposed between the projector and the projector beam recess, each viewfoil comprising an SLM having LCD adapted to display an image consisting of an event zone defined only by a plurality of two dimensional sectors;wherein the image is ...

Подробнее
Номер записи: 28
23-01-2020 дата публикации

VIRTUAL AND AUGMENTED REALITY SYSTEMS AND METHODS HAVING IMPROVED DIFFRACTIVE GRATING STRUCTURES

Номер: US20200026085A1
Автор: Greco Paul M., Klug Michael A., Schowengerdt Brian T., Tekolste Robert D.
Принадлежит: Magic Leap, Inc.

Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value. 1. An augmented reality (AR) display system for delivering augmented reality content to a user , comprising:an image-generating source to provide one or more frames of image data;a light modulator to transmit light associated with the one or more frames of image data;a diffractive optical element (DOE) to receive the light associated with the one or more frames of image data and direct the light to the user's eyes, the DOE comprising a diffraction structure having a waveguide substrate, a surface grating, and an underlayer disposed between the waveguide substrate and the surface grating; andwherein the surface grating has a surface grating refractive index, the underlayer has an underlayer refractive index, and the surface grating refractive index is greater than the underlayer refractive index.2. The system of claim 1 , wherein the underlayer refractive index is approximately 1.79 or 1. 84.3. The system of claim 1 , wherein the waveguide substrate has a waveguide substrate refractive index claim 1 , and the waveguide substrate refractive index is approximately 1.5 claim 1 , 1.7 claim 1 , or 1.8.4. The system of claim 1 , wherein all of the waveguide substrate claim 1 , the underlayer claim 1 , and the surface grating correspond to different refractive index values.5. The system of claim 1 , wherein the underlayer refractive index is higher value compared to a waveguide refractive index.6. The system of claim 1 , wherein the waveguide substrate claim 1 , the underlayer ...

Подробнее
Номер записи: 29
29-01-2015 дата публикации

Control of Light Wavefronts

Номер: US20150029588A1
Автор: David A. Fattal, Marco Fiorentino, Raymond G. Beausoleil
Принадлежит: Hewlett Packard Development Co LP

Techniques to control light wavefronts are described herein. A plurality of sub-wavelength grating (SWG) layers includes a SWG layer. The SWG layer is arranged to control a light wavefront.

Подробнее
Номер записи: 30
28-01-2021 дата публикации

DIFFRACTIVE OPTICAL ELEMENT

Номер: US20210026050A1
Автор: Iwata Kenichi
Принадлежит:

A diffractive optical element is provided that includes a first resin layer having steps on one surface, a second resin layer integrated with the first resin layer in tight contact, and a high refractive index layer disposed between a wall surface of the first resin layer and a wall surface of the second resin layer, wherein the high refractive index layer has a refractive index higher than those of the first resin layer and of the second resin layer, and the high refractive index layer is formed continuously to extend beyond the boundary between the wall surface and the inclined surface adjacent thereto, and to partly overlap the inclined surface. 1. An optical element comprising:a first resin layer having a first surface, the first surface having a plurality of first steps, wherein the plurality of first steps include a plurality of first flat wall surfaces and a plurality of first optically effective surfaces each bounded by the first flat wall surfaces;a second resin layer having a second surface, the second surface having a plurality of second steps, wherein the plurality of second steps include a plurality of second flat wall surfaces and a plurality of second optically effective surfaces each bounded by the second flat wall surfaces, and the plurality of second optically effective surfaces being in direct contact with the plurality of first optically effective surfaces; anda third portion being in contact with the first flat wall surfaces of the first resin layer and the second flat wall surfaces of the second resin layer, wherein the third portion has a refractive index different from that of the first resin layer and the second resin layer,wherein the plurality of first flat wall surfaces includes a first wall surface portion, the plurality of first optically effective surfaces includes a first optically effective surface portion disposed continuously with the first flat wall surface portion and a second optically effective surface portion disposed ...

Подробнее
Номер записи: 31
04-02-2016 дата публикации

Phase Gratings with Odd Symmetry for Lensed Optical Sensing

Номер: US20160033696A1
Автор: Gill Patrick R., Stork David G.
Принадлежит:

A sensing device with an odd-symmetry grating projects near-field spatial modulations onto a closely spaced photodetector array. Due to physical properties of the grating, the spatial modulations are in focus for a range of wavelengths and spacings. The spatial modulations are captured by the array, and photographs and other image information can be extracted from the resultant data. Used in conjunction with a converging optical element, versions of these gratings provide depth information about objects in an imaged scene. This depth information can be computationally extracted to obtain a depth map of the scene. 1. (canceled)2. A camera for sensing incident light within a wavelength band of interest , the camera comprising:an optical element operable to converge the incident light;an array of pixels spaced from the optical element and defining a focal plane a path of the converged incident light; and 'boundaries of odd symmetry separating stepped features on opposite sides of each boundary, the stepped features on the opposite sides of each boundary offset from the array by half of a wavelength within the wavelength band of interest, plus an integer multiple of the wavelength, to produce curtains of destructive interference at the array of pixels.', 'a phase grating in the path of the converged incident light and spaced from the array of pixels to cast an interference pattern on the array of pixels, the phase grating spaced from the array of pixels by more than fifteen microns and including3. The camera of claim 2 , wherein the wavelength band of interest has a maximum wavelength claim 2 , the phase grating having a minimum separation from the array of pixels of no more than 400 times the maximum wavelength.4. The camera of claim 2 , wherein the phase grating is integrated with the array of pixels.5. The camera of claim 2 , wherein the curtains exhibit radial lines.6. The camera of claim 5 , wherein the radial lines are curved.7. The camera of claim 2 , the phase ...

Подробнее
Номер записи: 32
04-02-2016 дата публикации

DIRECTIONAL OPTICAL RECEIVER

Номер: US20160033766A1
Автор: Abiri Behrooz, Hajimiri Seyed Ali
Принадлежит:

An optical phased array (OPA) receiver selectively detects, measures and differentiates between the amplitudes and directions of signals received from different directions. Because the OPA changes the direction that it looks toward electronically and without the use of any mechanical movements, the OPA is fast, has an enhanced sensitivity, and can be used in a wide variety applications, such as lens-free imaging systems. The OPA is adapted to dynamically control the array of optical elements and focus on the area of interest. The OPA achieves a higher numerical aperture compared to imaging systems that use conventional lens, thereby effectively maintaining a relatively large field of view and collection area concurrently. The OPA may be readily scaled by increasing its array size. Furthermore, because the OPA is relatively flat, it is ideally suited for small form factor applications such as cell phones and tablets. 1. An optical phased array receiver adapted to from an image of an object , the optical phased array comprising:a plurality of optical receiver elements receiving optical signals from the object;a plurality of phase shifters each associated with and receiving an optical signal from a different one of the plurality of optical receiver elements;a controller causing phase-shifted optical signals generated by the plurality of phase shifters to be substantially in phase; andat least one optical-to-electrical signal converter adapted to convert the plurality of phase-shifted optical signals to an electrical signal.2. The optical phased array receiver of wherein each optical receiver element is an optical grating element.3. The optical phased array receiver of wherein each phase shifter is selected from a group consisting of a thermal phase shifter claim 1 , a PIN phase shifter and a PN phase shifter.4. The optical phased array receiver of wherein said optical-to-electrical signal converter is a photo-diode.5. The optical phased array receiver of wherein said ...

Подробнее
Номер записи: 33
04-02-2016 дата публикации

Optical Components

Номер: US20160033784A1
Автор: Levola Tapani, Saarikko Pasi, Sainiemi Lauri
Принадлежит:

Various optical components are disclosed herein, which have diffraction gratings formed by modulations of at least portions of their outer surfaces. The gratings exhibit gradually varying characteristics that vary over the surface portion so as to gradually vary the manner in which the incident light is diffracted at different points on the surface portion. Display systems incorporating such optical components are also disclosed. 1. An optical component for use in an optical system , wherein the optical component has an outer surface and a diffraction grating is formed by a series of grooves in at least a portion of the outer surface that are substantially parallel to one another and substantially longer than they are wide;wherein the diffraction grating exhibits at least a first and a second groove characteristic at each point on the surface portion which both affect the manner in which light incident on the diffraction grating is diffracted at that point; andwherein the first and second groove characteristics gradually vary over the surface portion so as to gradually vary the manner in which the incident light is diffracted at different points on the surface portion, the first and second groove characteristics varying with respective gradients that are in different directions to one another at at least some points on the surface portion.2. An optical component according to wherein the first groove characteristic is one of and the second groove characteristic is a different one of: grating slant claim 1 , grating depth and grating linewidth.3. An optical component according to wherein the diffraction grating exhibits a third groove characteristic at each point which also affects the manner in which light incident on the diffraction grating is diffracted at that point claim 1 , and which also gradually varies over the surface portion so as to gradually vary the manner in which the incident light is diffracted at different points on the surface portion.4. An optical ...

Подробнее
Номер записи: 34
17-02-2022 дата публикации

Polychromatic Light Out-coupling Apparatus, Near-eye Displays Comprising the Same, and Method of Out-coupling Polychromatic Light

Номер: US20220050300A1
Автор: Eskolin Peter, JARVENPAA Toni, Kimmel Jyrki, Salmimaa Marja
Принадлежит: Magic Leap, Inc.

The present invention provides an apparatus comprising a first out-coupling diffractive optical element and a second out-coupling diffractive optical element. Each of the first and second out-coupling diffractive optical elements comprises a first region having a first repeated diffraction spacing, d, and a second region adjacent to the first region having a second repeated diffraction spacing, d, different from the first spacing, d. The first region of the first out-coupling diffractive optical element is superposed on and aligned with the second region of the second out-coupling diffractive optical element. The second region of the first out-coupling diffractive optical element is superposed on and aligned with the first region of the second out-coupling diffractive optical element. 1. An apparatus comprising:at least one in-coupling diffractive element;at least first and second intermediate optical elements configured to transmit light from the at least one in-coupling diffractive optical element in first and second directions that are respectively at an angle relative to one another; anda first out-coupling diffractive optical element configured to receive and outcouple light from the second intermediate optical element.2. An apparatus according to claim 1 , further comprising:a second out-coupling diffractive optical element wherein the first out-coupling diffractive optical element is superposed on the second out-coupling diffractive optical element and wherein each of the first and second out-coupling diffractive optical elements comprises:a first region, anda second region adjacent to the first region;wherein the first region of the first out-coupling diffractive optical element is superposed on and aligned with the second region of the second out-coupling diffractive optical element; andthe second region of the first out-coupling diffractive optical element is superposed on and aligned with the first region of the second out-coupling diffractive optical ...

Подробнее
Номер записи: 35
17-02-2022 дата публикации

IMAGE DISPLAY DEVICE

Номер: US20220050371A1
Автор: Nakamura Tomoharu
Принадлежит:

An image display device according to an aspect of the present technology includes an emission portion, a transparent base material, an irradiation target, and an optical portion. The emission portion emits image light along a predetermined axis. The transparent base material includes a tapered surface having a tapered shape along the predetermined axis. The irradiation target is disposed at at least a part around the predetermined axis along the tapered surface. The optical portion controls an incident angle of the image light on the irradiation target, the image light having been emitted from the emission portion, the optical portion being disposed in a manner that the optical portion faces the emission portion on the basis of the predetermined axis. 1. An image display device comprising:an emission portion that emits image light along a predetermined axis;a transparent base material that includes a tapered surface having a tapered shape along the predetermined axis;an irradiation target disposed at at least a part around the predetermined axis along the tapered surface; andan optical portion that controls an incident angle of the image light on the irradiation target, the image light having been emitted from the emission portion, the optical portion being disposed in a manner that the optical portion faces the emission portion on a basis of the predetermined axis.2. The image display device according to claim 1 , whereinthe transparent base material has a first surface that is on a side of the predetermined axis, and a second surface that is on a side opposite to the first surface, andthe tapered surface is formed on at least one of the first surface or the second surface.3. The image display device according to claim 2 ,wherein the transparent base material supports the irradiation target.4. The image display device according to claim 3 ,wherein the irradiation target is disposed on at least one of the first surface or the second surface.5. The image display ...

Подробнее
Номер записи: 36
30-01-2020 дата публикации

Diffractive Waveguide Providing Structured Illumination for Object Detection

Номер: US20200033190A1
Автор: Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

A projection display device comprising a light source and an SBG device having a multiplicity of separate SBG elements sandwiched between transparent substrates to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises a plurality of independently switchable transparent electrode elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes. 1. A transparent display for projecting image light onto the retina of an eye , said display comprising:a light source emitting light of a first wavelength;a lightguide supporting a first multiplicity of separately switchable SBG elements disposed in a single layer; anda coupler for directing said first wavelength light into a total internal reflection path within said lightguide, each said switchable grating element having a diffracting state and a non-diffracting state;wherein each said switchable SBG element in its diffracting state diffracts said first wavelength light to form a focused image region of predefined geometry and luminance distribution on said retina.2. The apparatus of claim 1 , wherein said lightguide comprises a pair of transparent substrates sandwiching said single layer of switchable grating elements claim 1 , wherein at least one transparent electrode for applying electric fields across said switchable grating elements are applied to each of the opposing faces of said transparent substrates claim 1 , at least one said transparent electrode comprising a plurality of independently switchable transparent electrode elements claim 1 , each of ...

Подробнее
Номер записи: 37
09-02-2017 дата публикации

Enhanced Pixel Resolution through Non-Uniform Ocular Projection

Номер: US20170038590A1
Автор: Mary Lou Jepsen
Принадлежит: Oculus VR Inc

A display device includes a two-dimensional array of tiles. Each tile includes a two-dimensional array of pixels and a lens, of a two-dimensional array of lenses. The display device also includes one or more processors coupled with the two-dimensional array of tiles and configured to: obtain a transformed image for projecting a non-transformed image on a retina of an eye of a user; activate a first subset of the two-dimensional array of tiles for projecting a first portion of the transformed image on the retina of the eye of the user with a first resolution; and activate a second subset of the two-dimensional array of tiles for projecting a second portion of the transformed image on the retina of the eye of the user with a second resolution.

Подробнее
Номер записи: 38
08-02-2018 дата публикации

DISPLAY HAVING LIGHT-SCATTERING PROPERTY

Номер: US20180038998A1
Автор: Toda Toshiki
Принадлежит: TOPPAN PRINTING CO., LTD.

A display includes light-scattering regions. Each of the light-scattering regions is provided with linear protrusions and/or recesses having the same longitudinal direction. The light-scattering regions are different from each other in the longitudinal direction. 1. A display comprising light-scattering regions each provided with linear protrusions or recesses having a same longitudinal direction ,wherein the light-scattering regions include first and second light-scattering regions, andthe first and second light-scattering regions are different from each other in at least one of length and width of the protrusions or recesses, and are configured to emit scattered light at first and second degrees of divergence, respectively, such that an image formed by the first and second light-scattering regions is seen as an image with light and shade.2. The display according to claim 1 , wherein the light-scattering regions are in the same plane.3. The display according to claim 1 , wherein the first and second light-scattering regions are equal to each other in the longitudinal direction.4. The display according to claim 3 , wherein the light-scattering regions further include a third light-scattering region being different from the first and second light-scattering regions in the longitudinal direction.5. The display according to claim 4 , wherein an image displayed on the third light-scattering region and an image displayed on the first or second light-scattering region are distinguishable from each other with an unaided eye.6. The display according to claim 4 , wherein a longitudinal direction of the third light-scattering region and the longitudinal direction of the first and second light-scattering regions are orthogonal to each other.7. The display according to claim 1 , wherein in at least one of the light-scattering regions claim 1 , the linear protrusions or recesses are arranged at random.8. The display according to claim 1 , wherein in at least one of the light- ...

Подробнее
Номер записи: 39
09-02-2017 дата публикации

Tile Array for Near-Ocular Display

Номер: US20170039904A1
Автор: Mary Lou Jepsen
Принадлежит: Oculus VR Inc

A display device includes a two-dimensional array of tiles. Each tile includes a two-dimensional array of pixels, and a lens, of a two-dimensional array of lenses, configured to direct at least a portion of the respective pattern of light from the two-dimensional array of pixels to a pupil of an eye of a user. Each pixel is configured to output light so that the two-dimensional array of pixels outputs a respective pattern of light. The display device also includes one or more processors coupled with the two-dimensional array of tiles and configured to activate at least a subset of the two-dimensional array of tiles for outputting, from at least the subset of the two-dimensional array of tiles, a collective pattern of light that is directed to the pupil of the eye of the user.

Подробнее
Номер записи: 40
09-02-2017 дата публикации

Optical System for Retinal Projection from Near-Ocular Display

Номер: US20170039905A1
Автор: Jepsen Mary Lou, Schmidtlin Edouard
Принадлежит:

A display device includes a two-dimensional array of tiles. Each tile includes a two-dimensional array of pixels, and a lens assembly, of a two-dimensional array of lens assemblies, configured to direct at least a portion of the respective pattern of light from the two-dimensional array of pixels to a pupil of an eye of a user. Each pixel is configured to output light so that the two-dimensional array of pixels outputs a respective pattern of light. The lens assembly includes multiple distinct optical elements, such as one or more lenses and/or one or more diffraction gratings. 2. The display device of claim 1 , including at least two microlens arrays claim 1 , wherein the lens assembly of a first tile of the two-dimensional array of tiles includes a first microlens of a first microlens array of the at least two microlens arrays and a second microlens of a second microlens array of the at least two microlens arrays claim 1 , and both the first microlens and the second microlens are located on a first optical axis.3. The display device of claim 2 , further including a third microlens array located between the first microlens array and the second microlens array claim 2 , wherein the lens assembly of the first tile also includes a third microlens of the third microlens array claim 2 , and the third microlens is located on the first optical axis between the first microlens and the second microlens.4. The display device of claim 2 , wherein the lens assembly of a second tile of the two-dimensional array of tiles includes a fourth microlens of the first microlens array and a fifth microlens of the second microlens array claim 2 , and both the fourth microlens and the fifth microlens are located on a second optical axis that is distinct from the first optical axis.5. The display device of claim 2 , wherein the second microlens is configured to collimate the respective pattern of light output by the two-dimensional array of pixels of the first tile.6. The display device of ...

Подробнее
Номер записи: 41
24-02-2022 дата публикации

Composite diffraction element, instrument, and image projection system

Номер: US20220057548A1
Автор: Kazuhiko Nemoto
Принадлежит: Sony Semiconductor Solutions Corp

The present technology aims to provide a diffraction element that functions like a transmissive hologram, and more particularly, aims to provide a diffraction element suitable for forming an image projection system. The present technology provides a composite diffraction element that includes a stack structure including a first diffraction element, a second diffraction element, and a third diffraction element in this order. The second diffraction element diffractively reflects light that has passed through the first diffraction element and reached the second diffraction element, toward the first diffraction element. The first diffraction element diffractively reflects the light diffractively reflected by the second diffraction element, toward the third diffraction element. The third diffraction element transmits the light diffractively reflected by the first diffraction element, and diffractively reflects zeroth-order light that has passed through the first diffraction element and the second diffraction element.

Подробнее
Номер записи: 42
24-02-2022 дата публикации

Light Field Imaging Device and Method for Depth Acquisition and Three-Dimensional Imaging

Номер: US20220057550A1
Автор: CHO Ji-ho, Saari Jonathan Ikola
Принадлежит:

A light field imaging device and method are provided. The device can include a diffraction grating assembly receiving a wavefront from a scene and including one or more diffraction gratings, each having a grating period along a grating axis and diffracting the wavefront to generate a diffracted wavefront. The device can also include a pixel array disposed under the diffraction grating assembly and detecting the diffracted wavefront in a near-field diffraction regime to provide light field image data about the scene. The pixel array has a pixel pitch along the grating axis that is smaller than the grating period. The device can further include a color filter array disposed over the pixel array to spatio-chromatically sample the diffracted wavefront prior to detection by the pixel array. The device and method can be implemented in backside-illuminated sensor architectures. Diffraction grating assemblies for use in the device and method are also disclosed. 189.-. (canceled)90. A method of imaging a scene , the method comprising:diffracting an optical wavefront originating from the scene with a diffraction grating having a grating period along a grating axis to generate a diffracted wavefront, the diffracted wavefront having, in a near-field diffraction region, an intensity profile that is spatially modulated according to the grating period and that shifts laterally along the grating axis upon varying an angle of incidence of the optical wavefront;detecting the diffracted wavefront with a pixel array comprising a plurality of light-sensitive pixels disposed under the diffraction grating in the near-field diffraction region, wherein said detecting comprises sampling different spatial parts of the intensity profile of the diffracted wavefront with first and second adjacent pixel groups of the plurality of light-sensitive pixels and generating therefrom respective first and second pixel responses that vary differently with the angle of incidence of the optical wavefront; ...

Подробнее
Номер записи: 43
24-02-2022 дата публикации

WAFER LEVEL MICROSTRUCTURES FOR AN OPTICAL LENS

Номер: US20220057553A1
Автор: Channon Kevin, Downing James Peter Drummond, Price Andy
Принадлежит: STMicroelectronics (Research & Development) Limited

Various embodiments provide an optical lens that includes wafer level diffractive microstructures. In one embodiment, the optical lens includes a substrate, a microstructure layer having a first refractive index, and a protective layer having a second refractive index that is different from the first refractive index. The microstructure layer is formed on the substrate and includes a plurality of diffractive microstructures. The protective layer is formed on the diffractive microstructures. The protective layer provides a cleanable surface and encapsulates the diffractive microstructures to prevent damage and contamination to the diffractive microstructures. In another embodiment, the optical lens includes a substrate and an anti-reflective layer. The anti-reflective layer is formed on the substrate and includes a plurality of diffractive microstructures. 1. A lens , comprising:a substrate;a plurality of diffractive microstructures having a first refractive index on the substrate, the plurality of diffractive microstructures having a plurality of different heights and widths;a protective layer on the plurality of diffractive microstructures, the protective layer having a second refractive index that is different from the first refractive index; anda coating on the substrate, the plurality of diffractive microstructures being spaced apart from the substrate by the coating.2. The lens of wherein at least two of the plurality of diffractive microstructures are separated from each other by the protective layer.3. The lens of wherein the coating contacts the substrate between the at least two of the plurality of diffractive microstructures.4. The lens of wherein at least some of the diffractive microstructures includes a plurality of diffractive layers separated from one another by respective layers of the coating.5. The lens of wherein an upper surface of the protective layer is substantially planar.6. The lens of wherein the protective layer comprises at least one of ...

Подробнее
Номер записи: 44
07-02-2019 дата публикации

DIFFRACTION OPTICAL ELEMENT, MANUFACTURING METHOD THEREOF, AND OPTICAL APPARATUS

Номер: US20190041556A1
Автор: Iwata Kenichi
Принадлежит:

There is provided a diffraction optical element which comprises a base material, and in which a first resin layer having a diffraction grating shape and a second resin layer are laminated on the base material. The diffraction grating shape forms a plurality of concentric annular sections when planarly viewed from a lamination direction of the diffraction optical element. The second resin layer comprises a first portion and a second portion, and the first portion is provided on a first annular section of the first resin layer. The second portion is continuously provided from above the first portion to above a region including a periphery of the first resin layer. A difference between a refractive index of the second portion on a center of the first annular section and a refractive index of the second portion on a circumference of the first annular section is within 0.0005. 1. A diffraction optical element comprising a base material , a first resin layer and a second resin layer which are laminated in order , whereinthe first resin layer is configured to have a diffraction grating shape,the diffraction grating shape is configured to form a plurality of concentric annular sections when planarly viewed from a lamination direction of the diffraction optical element,the second resin layer is configured to comprise a first portion and a second portion,the first portion is configured to be provided on at least a first annular section on the first resin layer,the first annular section is configured to be a circle surrounding a center of the diffraction optical element among the plurality of annular sections,the second portion is configured to be continuously provided from above the first portion to above a region including a periphery of the first resin layer, anda difference between a refractive index of the second portion on a center of the first annular section and a refractive index of the second portion on a circumference of the first annular section is within 0.0005.2. ...

Подробнее
Номер записи: 45
07-02-2019 дата публикации

OPTICAL ELEMENT, SPECTROSCOPIC APPARATUS, AND METHOD FOR MANUFACTURING THE SAME

Номер: US20190041557A1
Автор: Enokida Yukiya, Koyama Masatsugu, Okura Yukinobu
Принадлежит:

An optical element formed of a plurality of materials includes a middle layer between a base material and a reflecting member so as to suppress stripping, cracking and the like of the optical surface due to the difference in coefficients of thermal expansion among the component materials, in the case where a temperature difference in the service environment or a temperature difference between a manufacturing environment and the service environment is large. 120-. (canceled)21. A manufacturing method of an optical element , the optical element (a) comprising a middle layer between a base and a reflecting layer , and (b) having a plurality of optical surfaces on a surface of the reflecting layer , the method comprising:forming an electroplated film as the middle layer; andcutting the electroplated film.22. The manufacturing method according to claim 21 , wherein the electroplated film contains Cu or Ni as a main ingredient.23. The manufacturing method according to claim 21 , wherein the electroplated film is formed by a copper sulfate plating.24. The manufacturing method according to claim 23 , wherein the reflecting layer is formed on the electroplated film subjected to the cutting.25. The manufacturing method according to claim 24 , wherein the reflecting layer is formed by a sputtering process.26. The manufacturing method according to claim 24 , wherein the plurality of optical surfaces have surface roughness of 2 nm RMS or less.27. The manufacturing method according to claim 26 , wherein the electroplated film has a thickness of 10-3000 μm.28. The manufacturing method according to claim 27 , wherein the reflecting layer contains one or more of Au claim 27 , Ag claim 27 , and Al as a main ingredient.29. The manufacturing method according to claim 28 , wherein the base is glass.30. The manufacturing method according to claim 21 , wherein the middle layer comprises a plurality of stacked layers claim 21 , andwherein the plurality of layers are formed from ...

Подробнее
Номер записи: 46
07-02-2019 дата публикации

METHODS AND SYSTEM FOR CREATING FOCAL PLANES USING AN ALVAREZ LENS

Номер: US20190041558A1
Автор: Tekolste Robert D.
Принадлежит: Magic Leap, Inc.

Configurations are disclosed for presenting virtual reality and augmented reality experiences to users. The system may comprise a lens assembly comprising two transmissive plates, a first of the two transmissive plates comprising a first surface sag based at least in part on a cubic function, and a DOE to direct image information to a user's eye; wherein the DOE is placed in between the two transmissive plates of the lens assembly, and wherein the DOE is encoded with the inverse of the cubic function corresponding to the surface sag of the first transmissive plate; such that a wavefront created by the encoded DOE is compensated by the wavefront created by the first transmissive plate, thereby collimating light rays associated with virtual content delivered to the DOE. 1an image-generating source to provide one or more frames of image data;a light modulator to transmit light associated with the one or more frames of image data;a lens assembly comprising first and second transmissive plates, the first and second transmissive plates each having a first side and a second side that is opposite to the first side, the first side being a plano side, and the second side being a shaped side, the second side of the first transmissive plate comprising a first surface sag based at least in part on a cubic function, and the second side of the second transmissive plate comprising a second surface sag based at least in part on an inverse of the cubic function; anda diffractive optical element (DOE) to receive the light associated with the one or more frames of image data and direct the light to the user's eyes, the DOE being disposed between and adjacent to the first side of the first transmissive plate and the first side of the second transmissive plate, and wherein the DOE is encoded with refractive lens information corresponding to the inverse of the cubic function such that when the DOE is aligned so that the refractive lens information of the DOE cancels out the cubic function ...

Подробнее
Номер записи: 47
15-02-2018 дата публикации

DIFFRACTIVE DEVICE PRODUCING ANGLE DEPENDENT EFFECTS

Номер: US20180043724A1
Автор: HARDWICK Michael, Lee Robert
Принадлежит: CCL SECURE PTY LTD

An optical device for authenticating articles of value, the optical device including: a first diffractive structure for generating a first diffractive image; a second diffractive structure for generating a second diffractive image; and a non-diffractive structure; wherein, the first and second diffractive structures, and the non-diffractive structure, are positioned relative to each other such that when viewed from a first angle, both the first and second diffractive images are visible, and when viewed from a second angle, the first diffractive image is visible while the second diffractive image is not visible. 1. An optical device for authenticating articles of value , the optical device including:a first diffractive structure for generating a first diffractive image;a second diffractive structure for generating a second diffractive image; anda non-diffractive structure;wherein, the first and/or second diffractive structures are formed on the non-diffractive structure such that when viewed from a first angle, both the first and second diffractive images are visible, and when viewed from a second angle, the first diffractive image is visible while the second diffractive structure is obscured by the non-diffractive structure.2. An optical device according to claim 1 , wherein the optical device is formed on a substrate having a first surface claim 1 , wherein the first diffractive structure is at a first height relative to the first surface claim 1 , and the second diffractive structure is at a second height relative to the first surface such that a difference between the first and second heights obscures the second diffractive structure when viewed from the second angle.3. An optical device according to claim 1 , wherein the non-diffractive structure has a taller profile than the first and second diffractive structures such that when viewed in reflection from the second angle claim 1 , only the first diffractive image is visible.4. An optical device according to ...

Подробнее
Номер записи: 48
15-02-2018 дата публикации

OPTICAL DEVICE INCLUDING ZERO-ORDER IMAGERY

Номер: US20180043725A1
Автор: Lok Phei, Power Gary Fairless
Принадлежит: CCL SECURE PTY LTD

An optical device including: a first surface; and an arrangement of pixels on the first surface, wherein a plurality of the pixels includes a zero-order diffraction element, such that each zero-order diffraction element is configured for providing a zero-order diffractive effect. 125.-. (canceled)26. An optical device including:a first surface; andan arrangement of pixels on the first surface, wherein a plurality of the pixels includes a zero-order diffraction element,such that each zero-order diffraction element is configured for providing a zero-order diffractive effect, and wherein the arrangement of pixels is configured to provide an image, wherein the image includes an arrangement of microimages.27. An optical device as claimed in claim 26 , wherein the size of each pixel is the same and each pixel has a dimension of 5 to 500 microns.28. An optical device as claimed in claim 26 , wherein each pixel has an associated brightness claim 26 , the associated brightness of each pixel being selected from one of a finite number of brightness levels and/or from a continuous range of brightness levels.29. An optical device as claimed in claim 28 , wherein the zero-order diffraction element of each pixel is located within an active region of the pixel claim 28 , configured such that the brightness of each pixel is determined by the size of the active region of the pixel.30. An optical device as claimed in claim 28 , further including one or more non-diffractive pixels claim 28 , each non-diffractive pixel corresponding to a minimum brightness level.31. An optical device as claimed in claim 26 , wherein each zero-order diffraction element includes a periodic arrangement of grating elements and the period of the arrangement of grating elements for each zero-order diffraction element is the same.32. An optical device as claimed in claim 31 , wherein each zero-order diffraction element has a colour associated with it claim 31 , and wherein the period of the arrangement of ...

Подробнее
Номер записи: 49
06-02-2020 дата публикации

WAFER LEVEL MICROSTRUCTURES FOR AN OPTICAL LENS

Номер: US20200041704A1
Автор: Channon Kevin, Downing James Peter Drummond, Price Andy
Принадлежит: STMicroelectronics (Research & Development) Limited

Various embodiments provide an optical lens that includes wafer level diffractive microstructures. In one embodiment, the optical lens includes a substrate, a microstructure layer having a first refractive index, and a protective layer having a second refractive index that is different from the first refractive index. The microstructure layer is formed on the substrate and includes a plurality of diffractive microstructures. The protective layer is formed on the diffractive microstructures. The protective layer provides a cleanable surface and encapsulates the diffractive microstructures to prevent damage and contamination to the diffractive microstructures. In another embodiment, the optical lens includes a substrate and an anti-reflective layer. The anti-reflective layer is formed on the substrate and includes a plurality of diffractive microstructures. 1. A method , comprising:forming a first layer of a first material on a substrate, the first material having a first refractive index;exposing the substrate by forming a first plurality of openings in the first layer of the first material;forming a first layer of a second material in the first plurality of openings, the second material having a second refractive index that is different from the first refractive index;forming a second layer of the first material on the first layer of the first material and the first layer of the second material;exposing the first layer of the second material and portions of the first layer of the first material by forming a second plurality of openings in the second layer of the first material; andforming a second layer of the second material in the second plurality of openings.2. The method of claim 1 , further comprising:forming a third layer of the first material on the second layer of the first material and the second layer of the second material;exposing the second layer of the second material and portions of the second layer of the first material by forming a third plurality ...

Подробнее
Номер записи: 50
06-02-2020 дата публикации

Rainbow reduction for waveguide displays

Номер: US20200041791A1
Автор: Erik Shipton, Giuseppe Calafiore, Pasi Saarikko
Принадлежит: Facebook Technologies LLC

A multilayer grating is a diffraction grating that includes a plurality of layers. The plurality of layers arranged to form a 2-dimensional grating, the layers including at least a first patterned layer and a second patterned layer. The first patterned layer includes a plurality of different materials that are arranged in a first pattern such that the first patterned layer has a first index profile. The second patterned layer includes a plurality of different materials that are arranged in a second pattern such that the second patterned layer has a second index profile that is inverted relative to the first index profile. Ambient light incident on the first patterned layer and the second patterned layer creates a first diffracted ray and a second diffracted ray, respectively, and the first diffracted ray and the second diffracted ray destructively interfere with each other based in part on the inverted index profile.

Подробнее
Номер записи: 51
06-02-2020 дата публикации

STRUCTURED LIGHT PROJECTOR AND THREE-DIMENSIONAL IMAGE SENSING MODULE

Номер: US20200041809A1
Автор: Hsiao Ming-Shu, Liu Yi-Nung
Принадлежит: HIMAX TECHNOLOGIES LIMITED

A structured light projector including a light source, an irradiation range controlling device, and a diffractive optical element is provided. The irradiation range controlling device is disposed on a transmission path of a light beam from the light source. The diffractive optical element is disposed on a transmission path of the light beam from the irradiation range controlling device. The irradiation range controlling device is adapted to control an irradiation range of the light beam transmitted to the diffractive optical element so as to change a size of a region of the diffractive optical element illuminated by the light beam from the irradiation range controlling device. A three-dimensional image sensing module using the same is also provided. 1. A structured light projector , comprising:a light source;an irradiation range controlling device, disposed on a transmission path of a light beam from the light source; anda diffractive optical element, disposed on a transmission path of the light beam from the irradiation range controlling device, wherein the irradiation range controlling device is adapted to control an irradiation range of the light beam transmitted to the diffractive optical element so as to change a size of a region of the diffractive optical element illuminated by the light beam from the irradiation range controlling device.2. The structured light projector as claimed in claim 1 , wherein the light source is a laser light source.3. The structured light projector as claimed in claim 1 , wherein the irradiation range controlling device comprises a plurality of tunable lenses claim 1 , the plurality of tunable lenses are sequentially disposed on the transmission path of the light beam from the light source claim 1 , and each of the plurality of tunable lenses has tunable refracting power.4. The structured light projector as claimed in claim 1 , wherein the irradiation range controlling device comprises a tunable lens and a position controlling ...

Подробнее
Номер записи: 52
18-02-2016 дата публикации

SLIT GRITING, METHOD FOR MANUFACTURING THE SAME AND DISPLAY DEVICE

Номер: US20160047954A1
Автор: WANG Junwei
Принадлежит:

The present disclosure relates to a slit grating, a method for manufacturing the same and a display device. The slit grating includes an upper substrate, a lower substrate, an electric-controlled dielectric layer and a liquid composite layer arranged between the upper substrate and the lower substrate. The liquid composite layer consists of a light-shielding liquid and a light-transmitting liquid incompatible with each other. The electric-controlled dielectric layer has an electrically-induced light-shielding-liquid-philic or light-shielding-liquid-phobic property. 1. A slit grating , comprising an upper substrate and a lower substrate arranged hermetically and oppositely to each other to form a cell , and a liquid composite layer arranged between the upper substrate and the lower substrate ,wherein the liquid composite layer consists of a light-shielding liquid and a light-transmitting liquid incompatible with each other,a first transparent conductive layer, an insulating layer, a second transparent conductive layer and an electric-controlled dielectric layer are formed sequentially at an upper surface of the lower substrate, and the electric-controlled dielectric layer has an electrically-induced light-shielding-liquid-philic or light-shielding-liquid-phobic property, andthe second transparent conductive layer comprises a plurality of parallel, bar-like electrodes, the electric-controlled dielectric layer comprises a plurality of bar-like electric-controlled dielectric sublayers corresponding to regions where the bar-like electrodes are located, and the bar-like electrodes and the first transparent conductive layer are configured to control the respective bar-like electric-controlled dielectric sublayers to absorb or repel the light-shielding liquid.2. The slit grating according to claim 1 , wherein a plurality of crisscross partitioning walls are formed at the upper surface of the lower substrate so as to divide the upper surface of the lower substrate into a ...

Подробнее
Номер записи: 53
16-02-2017 дата публикации

CONTROLLABLE PLANAR OPTICAL FOCUSING SYSTEM

Номер: US20170045652A1
Автор: ARBABI Amir, Faraon Andrei
Принадлежит:

An optical device has a first metasurface. A high-contrast pattern of the first metasurface is operable for modifying, over a first phase profile, a phase front of an incident light beam. A second metasurface, is disposed over a plane parallel to the first metasurface with a second high-contrast pattern and operable for shaping, over a second phase profile, the modified phase front of the incident light beam into a converging spherical phase front. A spacer layer, in which the modified phase front of the incident light beam diffracts, is disposed in a controllably changeable separation between the first and second metasurfaces. Controllably changing the separation between the first and the second metasurfaces by a first distance correspondingly changes the position of the focus point of the converging spherical phase front by a second distance. 1. An optical device , comprising:a first metasurface, the first metasurface comprising a first high-contrast pattern operable for modifying, over a first phase profile, a phase front of a collimated narrow-band light beam incident to the first metasurface;a second metasurface disposed over a plane parallel to the first metasurface, the second metasurface comprising a second high-contrast pattern operable for shaping, over a second phase profile, the phase front of the modified phase front of the incident light beam into a converging spherical phase front; anda spacer layer in which the modified phase front of the incident light beam diffracts, the spacer layer disposed in a controllable separation between the first metasurface and the second surface, wherein controllably changing the separation between the first metasurface and the second metasurface by a first distance correspondingly changes the position of a focus point of the converging spherical phase front by a second distance.2. The optical device as described in wherein the controllably changing the separation between the first metasurface and the second metasurface ...

Подробнее
Номер записи: 54
15-02-2018 дата публикации

Three-dimensional display device

Номер: US20180045971A1
Автор: Kun Wu
Принадлежит: BOE Technology Group Co Ltd

The present disclosure provides a three-dimensional display device in which a pixel structure includes a plurality of sub-pixels arranged in rows and columns. In each column of sub-pixels, the sub-pixels are aligned. In each row of sub-pixels, each of the sub-pixels is staggered by half a sub-pixel with respect to an adjacent sub-pixel, and is different in color from the adjacent sub-pixel. The corresponding three-dimensional grating includes a plurality of strip-like grating structures periodically arranged in a horizontal direction, wherein the strip-like grating structures extend in the same direction that has a preset inclination angle with respect to the horizontal direction. Each strip-like grating structure corresponds to at least two sub-pixels in respective rows of sub-pixels which display different viewpoint images.

Подробнее
Номер записи: 55
19-02-2015 дата публикации

Methods for manufacturing grating sheet and lcd panel

Номер: US20150050804A1
Автор: Linlin LU
Принадлежит: Beijing BOE Optoelectronics Technology Co Ltd, BOE Technology Group Co Ltd

Methods for manufacturing the grating sheet and a liquid crystal display panel are provided. The grating sheet comprises a plurality of primary color gratings in parallel, each of which comprises a red R sub-grating, a green G sub-grating and a blue B sub-grating in parallel, and each sub-grating comprises an opening area and a reflective region disposed around the opening area and corresponds to a pixel unit on a sub-array substrate. The methods for manufacturing the grating sheet and a liquid crystal display panel may be applicable to a system with a liquid crystal display.

Подробнее
Номер записи: 56
08-05-2014 дата публикации

Optical element and production of same

Номер: US20140126061A1
Автор: Jens Brunne, Michael Pauls, Ruediger Grunwald, Ulrike Wallrabe
Принадлежит: Albert Ludwigs Universitaet Freiburg, Forschungsverbund Berlin FVB eV

An optical element includes a structured carrier layer having a macrostructure at a main surface and a layer of cured material. The layer of cured material includes an optically smooth surface facing away from the main surface, a macrostructure surface of the surface being dependent on the macrostructure of the carrier layer and on a layer thickness profile of the layer.

Подробнее
Номер записи: 57
03-03-2022 дата публикации

VIRTUAL IMAGE DISPLAY DEVICE AND OPTICAL UNIT

Номер: US20220066219A1
Автор: Saito Atsushi
Принадлежит: SEIKO EPSON CORPORATION

A virtual image display device includes an imaging light generation device, and an optical unit including a concave transmission mirror provided with a partial reflection film, the optical unit being configured to form a virtual image with the imaging light emitted from the imaging light generation device, wherein the optical unit includes a reflection type diffraction element disposed on an external side of the partial reflection film, the reflection type diffraction element being configured to diffract the imaging light so that the imaging light is deviated from an optical path passing through the concave transmission mirror.

Подробнее
Номер записи: 58
25-02-2021 дата публикации

SECURITY ELEMENTS AND METHODS OF MANUFACTURE THEREOF

Номер: US20210053380A1
Автор: HOLMES Brian
Принадлежит: DE LA RUE INTERNATIONAL LIMITED

A security element including: a first layer having a first surface; an array of image regions across the surface, each region including at least first and second sub-regions; a first diffractive optically variable effect generating structure in or on the surface across the first sub-regions; and a second diffractive optically variable effect generating structure in or on the surface across the second sub-regions; wherein the surface is arranged so each first sub-region has a first average inclination and each second sub-region has a second average inclination different from the first, wherein the first structure and inclination provide that the first effect is exhibited across the first sub-regions at least at a first viewing angle and the second structure and inclination provide that the second effect is exhibited across the second sub-regions at least at a second viewing angle different from the first. Also, a method of manufacturing the security element. 1. A security element comprising:a first layer having a first surface;an array of image regions across the first surface, each image region comprising at least a first sub-region and a second sub-region;a first diffractive optically variable effect generating structure provided in or on the first surface across the first sub-regions; anda second diffractive optically variable effect generating structure provided in or on the first surface across the second sub-regions;wherein the first surface is arranged such that each first sub-region has a first average inclination and such that each second sub-region has a second average inclination different from the first average inclination, wherein the first diffractive optically variable effect generating structure and the first average inclination provide that the first optically variable effect is exhibited across the first sub-regions at least at a first viewing angle and the second diffractive optically variable effect generating structure and the second average ...

Подробнее
Номер записи: 59
25-02-2021 дата публикации

DISPLAY DEVICE

Номер: US20210055556A1
Автор: Chang Wei-Jen, Fan Fu-Cheng, Shih Bao-Jen, TSAI Cheng-Hsiu
Принадлежит: HTC CORPORATION

A display device includes a display, an image beam shifter, and a light guiding component. The display generates an image beam. The image beam shifter receives the image beam and generates a projected image beam. The light guiding component receives the projected image beam to transport the projected image beam to different positions of a target zone in sequence. The image beam shifter projects the projected image beam to different positions of the light guiding component with time division. 1. A display device , comprising:a display, generating an image beam;an image beam shifter, receiving the image beam and generating a projected image beam; anda light guiding component, receiving the projected image beam to transport the projected image beam to different positions of a target zone in sequence,wherein the image beam shifter projects the projected image beams to different positions of the light guiding component with time division.2. The display device according to claim 1 , wherein the display respectively generates a first image beam and a second image beam in a first time interval and in a second time interval in sequence; the image beam shifter makes a first projected image beam be projected to a first position of the light guiding component and makes a second projected image beam be projected to a second position of the light guiding component; and the first position is different from the second position.3. The display device according to claim 2 , wherein the first projected image beam and the second projected image beam correspond to a first display picture and a second display picture respectively.4. The display device according to claim 2 , wherein the light guiding component transports the first projected image to a first partition of the target zone claim 2 , the light guiding component transports the second projected image to a second partition of the target zone; and the first partition is different from the second partition.5. The display device ...

Подробнее
Номер записи: 60
22-02-2018 дата публикации

Display, article, original plate, and method for producing original plate

Номер: US20180052262A1
Автор: Akira Nagano
Принадлежит: Toppan Printing Co Ltd

In display, in a plan view facing an obverse surface of a reflection layer, first reflection surfaces are substantially square in shape, and a second reflection surface occupies gaps between adjacent ones of the first reflection surfaces. The distance between the first reflection surfaces and the second reflection surface in the thickness direction of a substrate has an extent that the obverse surface of the reflection layer emit colored light by interference between light reflected from the first reflection surfaces and light reflected from the second reflection surface. In a plan view facing the obverse surface of the reflection layer, more than one of the first reflection surfaces are located on each of a plurality of imaginary lines. On a straight line intersecting more than one of the imaginary lines, distances between adjacent ones of the imaginary lines have different extents.

Подробнее
Номер записи: 61
23-02-2017 дата публикации

DIFFRACTIVE OVERLAY MARK

Номер: US20170052458A1
Автор: Tang Ming Hao
Принадлежит:

A method and apparatus for calculating overlay based on high order diffraction phase measurements are provided. Embodiments include forming a first diffraction pattern in a first layer of a wafer; forming a second diffraction pattern in a second layer of the wafer, the second layer being formed over the first layer; detecting a first or a higher odd order signal in an X and a Y direction from each of the first and second diffraction patterns; calculating a peak for each signal; measuring a delta value between peaks of the signals in the X direction and a delta value between peaks of the signals in the Y direction; and calculating an overlay between the first and second layers based on the delta values. 1. A method comprising:forming a first diffraction pattern in a first layer of a wafer;forming a second diffraction pattern in a second layer of the wafer, the second layer being formed over the first layer;detecting a first or a higher odd order signal in an X and a Y direction from each of the first and second diffraction patterns;calculating a peak for each signal;measuring a delta value between peaks of the signals in the X direction and a delta value between peaks of the signals in the Y direction; andcalculating an overlay between the first and second layers based on the delta values.2. The method according to claim 1 , comprising forming the first diffraction pattern with a pitch of 80 nanometer (nm) to 800 nm.3. The method according to claim 1 , comprising forming the second diffraction pattern with a pitch of 160 nm to 1600 nm.4. The method according to claim 1 , comprising forming the second diffraction pattern overlapping the first diffraction pattern in a parallel direction claim 1 , a perpendicular direction claim 1 , or a parallel and perpendicular direction to the first diffraction pattern.5. The method according to claim 4 , comprising detecting the first or higher odd order signal in the X and Y directions from each of the first and second diffraction ...

Подробнее
Номер записи: 62
14-02-2019 дата публикации

FABRICATION OF MULTILAYER NANOGRATING STRUCTURES

Номер: US20190051863A1
Автор: Basuray Sagnik, Bok Sangho, CHEN Biyan, Gangopadhyay Keshab, Gangopadhyay Shubhra, Grant Sheila, MATHAI Cherian Joseph, PATHAN Samiullah, Wood Aaron
Принадлежит:

Provided are nanograting structures and methods of fabrication thereof that allow for stable, robust gratings and nanostructure embedded gratings that enhance electromagnetic field, fluorescence, and photothermal coupling through surface plasmon or, photonic resonance. The gratings produced exhibit long term stability of the grating structure and improved shelf life without degradation of the properties such as fluorescence enhancement. Embodiments of the invention build nanograting structures layer-by-layer to optimize structural and optical properties and to enhance durability. 1. A method of manufacturing a nanoscale grating structure , comprising the steps of:spin-coating a mold in a solution of a polymer dissolved in a solvent;curing the solution of the polymer in the mold to obtain a grating;transferring the grating to a substrate;applying a hydrophilicity treatment to the grating;coating the treated grating in a fluorescence-enhancing reflective layer;coating the fluorescence-enhancing reflective layer with a protective layer.2. The method of claim 1 , wherein curing the solution of the polymer comprises exposing the polymer solution to ultraviolet light.3. The method of claim 1 , wherein curing the solution of the polymer comprises exposing the grating to 3-aminopropyltriethoxysilane.4. The method of claim 1 , further comprising the step of annealing the grating.5. The method of claim 4 , wherein the grating is annealed at 60 degrees Celsius for three hours claim 4 , then heated to 400 degrees Celsius at a rate of 1 degree Celsius per minute claim 4 , and then held at 400 degrees Celsius for one hour.6. The method of claim 1 , further comprising the step of applying an adhesion layer between the treated polymer grating and the fluorescence-enhancing reflective layer.7. The method of claim 6 , wherein the adhesion layer is made of titanium (IV) oxide.8. The method of claim 6 , wherein the adhesion layer is between approximately 5 nanometers thick and 10 ...

Подробнее
Номер записи: 63
10-03-2022 дата публикации

Compact Edge Illuminated Diffractive Display

Номер: US20220075242A1
Автор: Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

There is provided a projection display device comprising: a light source, an SBG device comprising a multiplicity of separately SBG elements sandwich between transparent substrate to which transparent electrodes have been applied. The substrates function as a light guide. A least one transparent electrode comprises plurality of independently switchable transparent electrodes elements, each electrode element substantially overlaying a unique SBG element. Each SBG element encodes image information to be projected on an image surface. Light coupled into the light guide, undergoes total internal reflection until diffracted out to the light guide by an activated SBG element. The SBG diffracts light out of the light guide to form an image region on an image surface when subjected to an applied voltage via said transparent electrodes. 117.-. (canceled)18. A backlight unit for illuminating a display panel , said backlight unit comprising:a first light source emitting light of a first wavelength;a waveguide supporting a first plurality of switchable Bragg grating (SBG) elements disposed in a single layer; anda coupler for directing said first wavelength light into a total internal reflection path within said waveguide, each SBG element having a diffracting state and a non-diffracting state,wherein when each SBG element is in its diffracting state, the SBG element diffracts said first wavelength light to form an illumination region of predefined geometry and luminance distribution on a surface of the display panel.19. The backlight unit of claim 18 , wherein said waveguide comprises transparent substrates sandwiching said SBG layer claim 18 , wherein transparent electrodes for applying electric fields across said SBG elements are disposed on opposing faces of said substrates claim 18 , and wherein at least one of said transparent electrodes comprises a plurality of independently switchable transparent electrode elements claim 18 , each of independently switchable electrode ...

Подробнее
Номер записи: 64
04-03-2021 дата публикации

System and method for high-resolution, high-speed capsule endomicroscopy

Номер: US20210063618A1
Автор: Guillermo J. Tearney, Jiheun Ryu
Принадлежит: General Hospital Corp

A probe for performing endomicroscopy, including: a light source; a waveguide coupled to the light source; a diffraction grating, the waveguide directing light from the light source to the diffraction grating; and a lens having a first aspheric surface and a second biconic surface, diffracted light from the diffraction grating being directed into the aspheric surface of the lens and being emitted from the biconic surface of the lens towards a transparent cylindrical surface of the probe.

Подробнее
Номер записи: 65
04-03-2021 дата публикации

Diffraction Light Guide Plate and Method of Manufacturing Diffraction Light Guide Plate

Номер: US20210063619A1
Автор: CHOO So Young, Her Eun Kyu, PARK Jeong Ho, SHIN BU Gon, YOON Jung Hwan
Принадлежит:

A smaller and lighter diffraction light guide plate, and a method of manufacturing the same. 1. A diffraction light guide plate , comprising:a first diffraction substrate; anda second diffraction substrate provided on the first diffraction substrate,wherein the first diffraction substrate includes a first diffraction grating layer on one surface of the first diffraction substrate and a second diffraction grating layer on an opposite surface of the first diffraction substrate,the second diffraction substrate includes a third diffraction grating layer on one surface of the second diffraction substrate,the first diffraction grating layer separates light having a wavelength of 550 nm or more and 700 nm or less,the second diffraction grating layer separates light having a wavelength of 400 nm or more and 550 nm or less, andthe third diffraction grating layer separates light having a wavelength of 450 nm or more and 650 nm or less.2. The diffraction light guide plate of claim 1 , wherein a thickness of each of the first diffraction substrate and the second diffraction substrate is 0.1 mm or more and 2 mm or less.3. The diffraction light guide plate of claim 1 , wherein a diffraction grating layer of the first diffraction substrate is spaced apart from the second diffraction substrate.4. The diffraction light guide plate of claim 1 , wherein each of the first diffraction grating layer claim 1 , the second diffraction grating layer and the third diffraction grating layer includes a first area into which light is incident claim 1 , a second area in which the incident light is expanded and moves claim 1 , and a third area from which the moved light is extracted claim 1 ,wherein the first areas of each of the first, second and third diffraction grating layers are included at corresponding positions on each of the first, second and third diffraction grating layers, respectively, andthe third areas of each of the first, second and third diffraction grating layers are included at ...

Подробнее
Номер записи: 66
04-03-2021 дата публикации

DIFFRACTION LIGHT GUIDE PLATE AND DISPLAY DEVICE INCLUDING THE SAME

Номер: US20210063627A1
Автор: HAN Sang Choll, PARK Jeong Ho, Park Seong Min, SHIN BU Gon
Принадлежит:

The present disclosure provides a diffraction light guide plate including: a light guide unit; an input diffraction optical element configured to diffract light which is outputted from a light source and inputted to the input diffraction optical element, to guide the inputted light on the light guide unit; and two diffraction optical elements configured to receive the diffracted light from the input diffraction optical element and one-dimensionally expand the received light by diffraction, wherein each of the two diffraction optical elements receives the expanded light from the other of the diffraction optical elements and outputs the received light from the light guide unit by the diffraction, and there is no region where the two diffraction optical elements overlap each other on the light guide unit. 1. A diffraction light guide plate comprising:a light guide unit configured to guide light;an input diffraction optical element configured to diffract light, which is outputted from a light source and inputted to the input diffraction optical element, so as to guide the inputted light on the light guide unit; andtwo diffraction optical elements configured to receive the diffracted light from the input diffraction optical element and one-dimensionally expand the received light by diffraction,wherein each of the two diffraction optical elements receives the expanded light from the other of the diffraction optical elements and outputs the received light from the light guide unit by diffraction, and there is no region where the two diffraction optical elements overlap each other on the light guide unit.2. The diffraction light guide plate of claim 1 , wherein each of the diffraction optical elements include linear gratings repeatedly formed at predetermined pitches claim 1 , and have grating vectors defined as having magnitudes inversely proportional to the pitches of the linear gratings and directions perpendicular to directions in which the linear gratings extend claim ...

Подробнее
Номер записи: 67
02-03-2017 дата публикации

TOUCHLESS USER INTERFACE FOR HANDHELD AND WEARABLE COMPUTERS

Номер: US20170060242A1
Автор: Gill Patrick R., Stork David G., Vogelsang Thomas
Принадлежит:

A user interface includes both a touchscreen for tactile input and one or more lensless optical sensors for sensing additional, remote gestures. Users can interact with the user interface in a volume of space near the display, and are thus not constrained to the relatively small area of the touchscreen. Remote hand or face gestures can be used to turn on or otherwise alter the tactile user interface. Shared user interfaces can operate without touch, and thus avoid cross-contamination of e.g. viruses and bacteria. 1. A wearable computer comprising:a display to present an image;a touchscreen to sense tactile input;an optical grating to diffract incident light into foci;an image sensor in a path of the foci, the image sensor to capture patterns of the foci; andat least one processor to detect a remote gesture from the patterns of the foci captured by the image sensor, alter the image responsive to the detected remote gestures, to detect a tactile gesture from the sensed tactile input, and to alter the image responsive to the detected tactile gesture.2. The computer of claim 1 , wherein the optical grating is in contact with the image sensor.3. The computer of claim 1 , further comprising a light source to emit the light.4. The computer of claim 3 , wherein the emitted light is infrared light.5. The computer of claim 1 , further comprising a second optical grating to split and diffract the incident light into second foci claim 1 , and a second image sensor in a path of the second foci claim 1 , the second image sensor to capture second patterns of the second foci.6. The computer of claim 1 , wherein the image sensor comprises a one-dimensional array of photosensitive elements.7. A method comprising:detecting a remote gesture using an optical phase grating that diffracts incident light into foci;displaying an image responsive to the detected remote gesture;detecting a tactile gesture on the image; andaltering the image responsive to the tactile gesture.8. The method of ...

Подробнее
Номер записи: 68
22-05-2014 дата публикации

Diffraction optical element and manufacturing method therefor

Номер: US20140139923A1
Автор: Akiko Murata, Tatsutoshi Suenaga, Yuka Okada
Принадлежит: Panasonic Corp

A diffractive optical element disclosed in the present application includes: a base which is made of a first optical material containing a first resin and which has a diffraction grating in its surface; and an optical adjustment layer which is made of a second optical material containing a second resin and inorganic particles and which is provided on the base so as to cover the diffraction grating, wherein ΔSP which is defined by a formula shown below is not less than −0.7 and not more than +0.7 [cal/cm 3 ] 1/2 : ΔSP=[a solubility parameter of the second resin]−[a solubility parameter of the first resin], and a design order of diffraction caused by the diffraction grating is n th order, and unwanted order diffracted light of n+1 th order in a wavelength range of not less than 400 nm and not more than 700 nm is not more than 7%.

Подробнее
Номер записи: 69
17-03-2022 дата публикации

Method of building a 3d functional optical material layer stacking structure

Номер: US20220082738A1
Автор: Christopher Dennis Bencher, Ludovic Godet, Michael Yu-Tak Young, Naamah ARGAMAN, Robert Jan Visser, Wayne Mcmillan
Принадлежит: Applied Materials Inc

Embodiments herein describe a sub-micron 3D diffractive optics element and a method for forming the sub-micron 3D diffractive optics element. In a first embodiment, a method is provided for forming a sub-micron 3D diffractive optics element on a film stack disposed on a substrate without planarization. The method includes forming a hardmask on a top surface of a film stack. Forming a mask material on a portion of the top surface and a portion of the hardmask. Etching the top surface. Trimming the mask. Etching the top surface again. Trimming the mask a second time. Etching the top surface yet again and then stripping the mask material.

Подробнее
Номер записи: 70
11-03-2021 дата публикации

DISPLAY DEVICE WITH DIFFRACTION GRATING HAVING REDUCED POLARIZATION SENSITIVITY

Номер: US20210072437A1
Автор: Deng Xiaopei, Luo Kang, Messer Kevin, Singh Vikramjit, Xu Frank Y., Yang Shuqiang
Принадлежит:

Diffraction gratings provide optical elements in head-mounted display systems to, e.g., incouple light into or out-couple light out of a waveguide. These diffraction gratings may be configured to have reduced polarization sensitivity. Such gratings may, for example, incouple or outcouple light of different polarizations with similar level of efficiency. The diffraction gratings and waveguides may include a transmissive layer and a metal layer. The diffraction grating may comprises a blazed grating. 1. A head-mounted display system comprising:a head-mountable frame;a light projection system configured to output light to provide image content;a waveguide supported by the frame, the waveguide comprising a substrate configured to guide at least a portion of the light from said light projection system coupled into said waveguide;a first diffraction grating comprising material different than said substrate over said substrate;a first layer disposed over said first diffraction grating; anda second layer comprising metal disposed over said first diffraction grating such that said diffraction grating has a first diffraction efficiency for a first polarization over a range of angles of light incident thereon and a second diffraction efficiency for a second polarization over the range of angles of light incident thereon, the first diffraction efficiency being from 1 to 2 times the second diffraction efficiency.2. The head-mounted display system of claim 1 , wherein the substrate comprises material having an index of refraction of at least 1.9.3. The head-mounted display system of claim 1 , wherein the first diffraction grating material comprises polymer.4. The head-mounted display of claim 1 , wherein the first diffraction grating material comprises imprintable material.5. The head-mounted display system of claim 1 , wherein the first diffraction grating material has a refractive index of 1.4 to 1.95.6. The head-mounted display system of claim 1 , wherein the first diffraction ...

Подробнее
Номер записи: 71
19-03-2015 дата публикации

LIGHT EXTRACTION PRODUCT FOR SEMICONDUCTOR LIGHT EMITTING DEVICE AND LIGHT EMITTING DEVICE

Номер: US20150076468A1
Автор: KOIKE Jun, Takagiwa Aya, Yamaguchi Fujito
Принадлежит: ASAHI KASEI E-MATERIALS CORPORATION

A light extraction product () for a semiconductor light emitting device is provided with a concavo-convex structure layer (), provided with a concavo-convex structure () on a surface thereof, having a first refractive index (n1) and a light extraction layer (), provided on the convex portion of the concavo-convex structure (), having a second refractive index (n2), where in a first light extraction layer () a distance Lcv between an average position Sh of tops of the convex-portions and a convex-portion upper interface average position Scv of the first light extraction layer () meets equation (1) 10 nm≦Lcv≦5000 nm, in the concavo-convex structure () a convex-portion average height H meets equation (2) 10 nm≦H≦5000 nm, an average pitch P meets equation (3) 50 nm≦P≦5000 nm, and the distance Lcv and the convex-portion average height H meet equation (4) 50 nm≦Lcv+H≦6000 nm. It is possible to improve light extraction efficiency from the semiconductor light emitting device using the light extraction product (), and further to enhance long-term reliability of the semiconductor light emitting device. 1. A light extraction product for a semiconductor light emitting device , comprising:a concavo-convex structure layer, provided with a concavo-convex structure on a surface thereof, having a first refractive index (n1); anda light extraction layer, provided on the concavo-convex structure, having a second refractive index (n2),wherein the first refractive index (n1) is substantially different from the second refractive index (n2),the light extraction layer includes a first light extraction layer provided on a convex portion of the concavo-convex structure, [{'br': None, 'i': 'Lcv≦', '10 nm≦5000 nm\u2003\u2003Eq. (1)'}, {'br': None, 'i': 'H≦', '10 nm≦5000 nm\u2003\u2003Eq. (2)'}, {'br': None, 'i': 'P≦', '50 nm≦5000 nm\u2003\u2003Eq. (3)'}, {'br': None, 'i': 'Lcv+H≦', '50 nm≦6000 nm\u2003\u2003Eq. (4)'}], 'in the first light extraction layer a distance Lcv between an average ...

Подробнее
Номер записи: 72
05-03-2020 дата публикации

AN OPTICAL SECURITY DEVICE AND METHOD OF MANUFACTURE

Номер: US20200070564A1
Автор: James Randall P., Long Michael D., Newcomb Diana, Power Gary Fairless
Принадлежит: CCL SECURE PTY LTD

A security device is disclosed including a substrate and one or more focusing elements or lens structures located on one side of the substrate. The security device includes a plurality of image elements associated with each focusing element wherein the image elements include at least first and second groups of image elements. Each image element may be composed of pixels located in an object plane to be viewable through the associated focusing element. Each image element comprises a diffractive grating element or sub-wavelength grating element which when illuminated by a light source generates a diffraction image observable at a range of viewing angles around the device. Image elements of the first group are visible in a first range of viewing angles and image elements of the second group are visible in a second range of viewing angles. The security device is particularly suitable for use on security documents, such as banknotes. A method of forming a security device is also disclosed. 1. A security device including:a plurality of focusing elements;a plurality of image elements associated with each focusing element wherein said image elements include at least a first and a second group of image elements,wherein each image element is located in an object plane to be viewable through the associated focusing element,wherein each image element comprises a diffractive grating element or sub-wavelength grating element which when illuminated by a light source generates a diffraction image observable at a range of viewing angles around the device, and image elements of the first group are visible in a first range of viewing angles and image elements of the second group are visible in a second range of viewing angles.2. A security device according to claim 1 , wherein said image elements include three or more groups of image elements to represent an image observable from different viewing angles.3. A security device according to wherein the diffraction image is a greyscale or ...

Подробнее
Номер записи: 73
07-03-2019 дата публикации

X-RAY IMAGING APPARATUS

Номер: US20190072503A1
Автор: DOKI Takahiro, HORIBA Akira, Kimura Kenji, MIZUSHIMA Hiroshi, Morimoto Naoki, SANO Satoshi, SHIRAI Taro
Принадлежит:

The X-ray imaging apparatus is provided with a plurality of gratings including an X-ray source and a first grating, a detector, a grating rotation mechanism for rotating a plurality of gratings respectively, and an image processor for generating at least a dark field image. The image processor is configured to generate a dark field image captured by arranging the grating at a plurality of angles in a plane orthogonal to the optical axis direction. 1. An X-ray imaging apparatus comprising:an X-ray source;a plurality of gratings including a first grating for forming a self-image by X-rays irradiated from the X-ray source and a second grating for causing interference with the self-image of the first grating;a detector configured to detect the X-rays irradiated from the X-ray source;a grating rotation mechanism configured to rotate each of the plurality of gratings in a plane orthogonal to an optical axis direction of the X-rays; andan image processor configured to generate at least a dark field image from an intensity distribution of the X-rays detected by the detector,wherein the image processor is configured to generate the dark field image captured by arranging the gratings at a plurality of angles in the plane orthogonal to the optical axis direction.2. The X-ray imaging apparatus as recited in claim 1 , whereinthe grating rotation mechanism is configured to arrange the plurality of gratings in at least any two directions among a vertical direction, a lateral direction, and an oblique direction in the plane orthogonal to the optical axis direction.3. The X-ray imaging apparatus as recited in claim 1 , further comprising:a grating moving mechanism configured to move at least one of the plurality of gratings,wherein the grating moving mechanism is configured to move the at least one of the plurality of gratings together with the grating rotation mechanism after rotating the plurality of gratings.4. The X-ray imaging apparatus as recited in claim 3 , whereinthe ...

Подробнее
Номер записи: 74
05-03-2020 дата публикации

DIFFRACTION GRATING DEVICE, METHOD OF MANUFACTURING THE SAME, AND OPTICAL APPARATUS INCLUDING THE DIFFRACTION GRATING DEVICE

Номер: US20200073031A1
Автор: BORN Brandon, Brongersma Mark L., LEE Sunghoon
Принадлежит:

Provided are a diffraction grating device, a method of manufacturing the diffraction grating device, and an optical apparatus including the diffraction grating device. The diffraction grating device includes a diffraction grating arranged on a light reflection substrate. The diffraction grating includes a plurality of diffraction elements, each diffraction element from among the plurality of diffraction elements having a height that causes a destructive interference between first light rays reflected by a top surface therefore and second light rays reflected by a bottom surface thereof, the first and second light rays being incident on the top and bottom surfaces, respectively, at an incidence angle greater than 45°. 1. A diffraction grating device comprising:a light reflection substrate; anda diffraction grating arranged on the light reflection substrate,wherein the diffraction grating comprises a plurality of diffraction elements, each diffraction element from among the plurality of diffraction elements having a height that causes a destructive interference between first light rays reflected by a top surface thereof and second light rays reflected by a bottom surface thereof, the first and second light rays being incident on the top and bottom surfaces, respectively, at an incidence angle greater than 45°.2. The diffraction grating device of claim 1 , further comprising:a dielectric layer between the light reflection substrate and the diffraction grating, wherein a thickness of the dielectric layer is an integer multiple of a wavelength of light incident on the diffraction grating.3. The diffraction grating device of claim 1 , wherein the light reflection substrate is a Bragg reflector comprising dielectrics having refractive indexes different from one another.4. The diffraction grating device of claim 1 , wherein a refractive index of the diffraction grating is in a range from 1.3 to 2.0.5. The diffraction grating device of claim 1 , wherein each diffraction ...

Подробнее
Номер записи: 75
18-03-2021 дата публикации

DIFFRACTIVE GRATING

Номер: US20210080628A1
Автор: Blomstedt Kasimir, Rahomäki Jussi, Vartiainen Ismo
Принадлежит: DISPELIX OY

The invention relates to a selective diffractive grating and applications thereof. The grating comprised in a periodic alternating pattern first material having a first dispersion curve (n), and second material having a second dispersion curve (n) different from the first dispersion curve (n). According to the invention, the first and second dispersion curves (n−i, n 2) intersect each other at two or more different wavelengths (λλ). 1. A two-dimensional waveguide comprising a diffractive grating arranged on a surface or within the waveguide , the diffractive grating comprising in a periodic alternating patternfirst material having a first dispersion curve,second material having a second dispersion curve different from the first dispersion curve, whereinsaid first and second dispersion curves intersect each other at two or more different wavelengths.2. The waveguide according to claim 1 , wherein said different wavelengths are within the wavelength range of 380-750 nm claim 1 , separated by at least 50 nm.3. The waveguide according to or claim 1 , wherein at least one of said materials is SiN.4. The waveguide according to any of the preceding claims claim 1 , wherein at least one of said materials is TiO claim 1 , HfOor ZrO.5. The waveguide according to any of the preceding claims claim 1 , wherein the dispersion curves differ at least at some wavelength within the range of 380-750 nm by at least 0.05 units claim 1 , in particular at least 0.1 units.6. The waveguide according to any of the preceding claims claim 1 , wherein the grating is arranged on a major surface of the waveguide.7. The waveguide according to any of the preceding claims claim 1 , comprising a stack of such gratings with different intersection wavelengths.8. The waveguide according to claim 7 , wherein the intersection wavelengths of the stack of gratings is adapted so that each grating has one intersection wavelength common with one intersection wavelength of each other grating of the stack.9. The ...

Подробнее
Номер записи: 76
05-03-2020 дата публикации

Image sensors having grating structures therein that provide enhanced diffraction of incident light

Номер: US20200075656A1
Автор: Euiyoung Song, Jae Ho Kim, Jungchak Ahn, Kwanghee Lee, Uihui KWON, Wook Lee
Принадлежит: SAMSUNG ELECTRONICS CO LTD

An image sensor may include a semiconductor substrate having a light receiving surface thereon and a plurality of spaced-apart semiconductor photoelectric conversion regions at adjacent locations therein. A grating structure is provided on the light receiving surface. This grating structure extends opposite each of the plurality of spaced-apart photoelectric conversion regions. An optically-transparent layer is provided on the grating structure. This grating structure includes a plurality of spaced-apart grating patterns, which can have the same height and the same width. In addition, the grating patterns may be spaced apart from each other by a uniform distance. The grating structure is configured to selectively produce ±1 or higher order diffraction lights to the photoelectric conversion regions, in response to light incident thereon.

Подробнее
Номер записи: 77
22-03-2018 дата публикации

Gradient Index Lens for Infrared Imaging

Номер: US20180081091A1
Автор: Batey John, Ganapathi Srinivasan K., KINTZ Gregory J., Petersen Kurt E., Stephanou Philip J.
Принадлежит: INVIS Technologies Corporation

A gradient-index lens for directing incident electromagnetic radiation comprises at least one substrate having a plurality of micro-features (e.g., trenches or holes) that may be arranged in a pattern of varied size and/or spacing. Each of the micro-features has at least one dimension that is less than a wavelength of the electromagnetic radiation. The spacing between adjacent micro-features is less than the wavelength of the electromagnetic radiation, and the size and spacing of the micro-features are sufficient to produce an effective refractive index profile of the lens that is graded. 1. A gradient-index lens for directing incident electromagnetic radiation within a wavelength range of about 8 to 15 μm , the lens comprising at least one germanium or silicon substrate having a plurality of trenches formed therein , wherein each of the trenches has at least one dimension that is less than 8 μm , each of the trenches has a ratio of length to width that is greater than or equal to 3:1 , a majority of the trenches have an aspect ratio of depth to width greater than or equal to 30:1 , the spacing between adjacent trenches is less than 8 μm , and an effective refractive index profile of the lens is graded.2. The lens of claim 1 , wherein each of the trenches has a cross-sectional area in a plane substantially perpendicular to a line defining the depth of the trench claim 1 , and the cross-sectional area is substantially shaped like an arc claim 1 , spiral claim 1 , circle or ring.3. The lens of claim 1 , wherein the trenches are shaped like arcs that are arranged in a pattern of substantially concentric circles or rings having discontinuities that are less than 8 μm.4. A camera comprising at least one pixel in a focal plane claim 1 , wherein the lens of is arranged to direct the electromagnetic radiation to the pixel.5. The camera of claim 4 , further comprising at least one readout circuit electrically connected to the pixel claim 4 , and further comprising at least ...

Подробнее
Номер записи: 78
22-03-2018 дата публикации

LIGHT MODULATION PANEL & DISPLAY DEVICE

Номер: US20180081095A1
Автор: CHEN Lili, DONG Ruijun, Dong Xue, Sun Haiwei, WANG Chenru
Принадлежит:

This disclosure relates to a light modulation panel and a display device. The light modulation panel comprises: a color separation grating plate having a plurality of light-transmissive microstructures; a reception substrate located on a light exit side of the color separation grating plate and spaced away from the color separation grating plate; and an optical waveguide layer located on a light exit side of the reception substrate. According to technical solutions of this disclosure, the optical waveguide layer can modulate the exit light into collimated light. As a result, cross-color phenomenons of the display device can be effectively improved, and thereby the display quality is enhanced. In addition, by adjusting a structure of the optical waveguide layer, the exit light can also be emitted out at a preset angle such that the display device can be applied in occasions such as 2D display, 3D display or privacy protection. 1. A light modulation panel comprising:a color separation grating plate having a plurality of light-transmissive microstructures;a reception substrate located on a light exit side of the color separation grating plate and spaced away from the color separation grating plate; andan optical waveguide layer located on a light exit side of the reception substrate.2. The light modulation panel according to claim 1 , whereinthe optical waveguide layer comprises at least ten layers of transparent dielectric, andrefractive indexes of the at least ten layers of transparent dielectric gradually increase in a light exit direction of the light modulation panel.3. The light modulation panel according to claim 2 , whereinthe at least ten layers of transparent dielectric are made of different materials.4. The light modulation panel according to claim 2 , whereinthe at least ten layers of transparent dielectric are made of a same material with different densities.5. The light modulation panel according to claim 2 , whereineach layer of transparent dielectric ...

Подробнее
Номер записи: 79
14-03-2019 дата публикации

DIFFRACTIVE OPTICAL ELEMENT AND METHOD FOR THE MANUFACTURE THEREOF

Номер: US20190079224A1
Автор: Fiess Reinhold, Graf Tobias
Принадлежит:

A diffractive optical element includes at least two diffractive structures situated next to one another, having differing functionalities, and being configured to, responsive to being irradiated independently of one another with incoherent laser light from beams of their respectively coupled laser sources, generate respective diffraction patterns that do not interfere with one another and that combine as an overall diffraction pattern in a far field. A method is provided for manufacturing such a diffractive optical element. 1. A diffractive optical element comprising:at least two diffractive structures situated next to one another and configured to, responsive to being irradiated independently of one another with incoherent laser light, generate respective diffraction patterns that combine as an overall diffraction pattern in a far field in which the respective diffraction patterns do not interfere with one another.2. The diffractive optical element of claim 1 , wherein the diffraction patterns generated in the far field are situated next to one another in an at least partially superimposed manner.3. The diffractive optical element of claim 1 , wherein each pair of immediately adjacent ones of the diffractive structures differ in an active order by at least one diffraction order.4. The diffractive optical element of claim 1 , wherein each of the respective diffraction patterns generated by the diffractive structures is a plurality of spaced apart rows made up of individual spots claim 1 , and the overall diffraction pattern forms a closed field made up of individual directly abutting single spots.5. The diffractive optical element of claim 1 , wherein at least one of the diffractive structures includes a weakening filter configured to vary an intensity of the respective diffraction pattern generated by the respective diffractive structure.6. A method for manufacturing a diffractive optical element claim 1 , the method comprising:a) establishing a target distribution ...

Подробнее
Номер записи: 80
22-03-2018 дата публикации

Diffraction Grating and Method of Manufacture

Номер: US20180081170A1
Автор: Jan Eskolin, Jari Turunen, Jyrki Kimmel, Jyrki Saarinen, Seppo Honkanen, Toni Järvenpää
Принадлежит: NOKIA TECHNOLOGIES OY

A method including forming a substrate to form a template which includes areas of high relief and areas of low relief; and forming a high refractive index diffraction grating in the template by adding high refractive index material to the template to form a continuous low relief surface. The high refractive index material fills the areas of low relief and covers the areas of high relief of the template to form a high refractive index diffraction grating. The high refractive index diffraction grating includes the high refractive index material configured to have a low relief side corresponding to the continuous low relief surface and configured by the template to have a periodic side including areas of high relief and areas of low relief which periodically alternate in the first direction with the first periodicity and are interconnected by the high refractive index material.

Подробнее
Номер записи: 81
31-03-2022 дата публикации

Holographic Projectors Including Size Correction and Alignment of Beams Having Different Wavelengths of Light

Номер: US20220100147A1
Автор: Kai-Han Chang, Thomas A. Seder
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A holographic projection system including first, second and third light sources, SLMs, a lens, a combiner and a control module. The first, second and third light sources generate respective light beams. The light beams have respective wavelengths. The SLMs respectively diffract the light beams. The lens is disposed to adjust a divergence angle of one of the light beams, such that diffracted light out of each of the SLMs is at a same diffraction angle. The SLMs encode phase holograms including respective versions of a graphic image based on light generated by the light sources including light output from the lens to provide phase hologram beams. The combiner combines the phase hologram beams to provide a combined phase hologram beam projected for viewing a combined graphic image. The control module encodes a prism hologram on one of the SLMs to align outputs of the SLMs.

Подробнее
Номер записи: 82
12-03-2020 дата публикации

APPARATUS AND METHOD FOR FORMING A DIFFRACTION GRATING AND PRINTED ARTICLE INCLUDING A DIFFRACTION GRATING

Номер: US20200081167A1
Автор: Chapman Edward N.
Принадлежит: XEROX CORPORATION

A method of forming an article including a diffraction grating includes forming a periodic structure by printing lines on a first side of transparent substrate with a toner. The lines have a frequency and a spacing which causes incident light to be diffracted into a plurality of beams travelling in different directions. The method can be used for forming reflective or transmissive diffraction gratings using xerographic printing techniques. 1. A method of forming an article comprising a diffraction grating comprising:forming a periodic structure by printing lines on a first side of transparent substrate with a toner, the lines having a frequency and a spacing which causes incident light to be diffracted into a plurality of beams travelling in different directions.2. The method of claim 1 , wherein the transparent substrate comprises a flexible polymer sheet.3. The method of claim 1 , wherein the flexible polymer sheet has a thickness of no greater than 0.5 mm.4. The method of claim 1 , wherein the printing comprises xerographic printing.5. The method of claim 1 , wherein the lines have a pitch of no greater than 0.3 mm.6. The method of claim 1 , wherein the lines have a pitch of no greater than 0.2 mm.7. The method of claim 1 , further comprising storing a vector pattern cell in memory claim 1 , generating an array comprising multiple instances of the vector pattern cell in memory and printing the printing lines in accordance with the array.8. The method of claim 7 , wherein the vector pattern cell includes portions of at least two lines claim 7 , each portion being one pixel in width and being spaced from the portion of the next line by at least two pixels.9. The method of claim 1 , further comprising at least one of:covering the first side of the printed transparent substrate with at least one transparent layer; andbacking a second side of printed transparent substrate with a reflective layer.10. The method of claim 9 , further comprising joining the printed ...

Подробнее
Номер записи: 83
12-03-2020 дата публикации

POLARIZATION-SENSITIVE COMPONENTS IN OPTICAL SYSTEMS FOR LARGE PUPIL ACCEPTANCE ANGLES

Номер: US20200081252A1
Автор: Jamali Afsoon, Lam Wai Sze Tiffany, Lanman Douglas Robert, Lu Lu, Maimone Andrew, McEldowney Scott Charles, Moheghi Alireza
Принадлежит:

A near eye display (NED) includes an electronic display configured to output image light. Further, the NED includes an eye tracking module and multiple optical elements that are combined to form an optical system to allow for changes in position of one or both eyes of a user of the NED. Various types of such optical elements, which may have optical states that are switchable, may be used to steer a light beam toward the user's eye. A direction of the steering may be based on eye tracking information measured by the eye tracking module. 1. An optical system , comprising:an eye tracking module configured to determine eye position information;a control module configured to determine a first direction for steering light based on the eye position information; anda first optical module including a switchable polarization-sensitive element configured to direct light incident on the first optical module into the first direction.2. The optical system of claim 1 , wherein:the first optical module includes a plurality of grating layers; andeach grating layer included in the plurality of grating layers is configured to be individually switched on or switched off so that the light incident on the first optical module is directed into the first direction by causing one or more grating layers of the plurality of grating layers to switch on or to switch off.3. The optical system of claim 2 , wherein each grating layer of the plurality of grating layers is configured to steer light incident on the grating layer by an angle that is distinct from steering angles of the other grating layers of the plurality of grating layers.4. The optical system of claim 1 , wherein the control module is further configured to transmit an electronic signal to the first optical module causing the first optical module to scan through multiple directions for directing the light incident on the first optical module.5. The optical system of claim 1 , further comprising an image source configured to generate ...

Подробнее
Номер записи: 84
24-03-2016 дата публикации

ILLUMINATION DEVICE AND BIOMETRIC AUTHENTICATION APPARATUS

Номер: US20160088203A1
Автор: Abiko Yukihiro, HAMA SOICHI, Maeda Satoshi
Принадлежит:

An illumination device includes M light sources provided on a surface of a substrate, a diffraction optical element configured to diffract light from the M light sources to irradiate N illuminating areas into which an illuminating region is segmented, and a control unit. The control unit turns on L=M/N light sources of each of first through Nth light source groups during first through Nth time intervals, respectively, and successively irradiates the light from the on L light sources of the first through Nth light source groups in time division onto first through N illuminating areas forming the illuminating region, where M and N are natural numbers greater than or equal to 2, and L is a natural number greater than or equal to 1. 1. An illumination device comprising:M light sources provided on a surface of a substrate;a diffraction optical element configured to diffract light from the M light sources to irradiate N illuminating areas into which an illuminating region is segmented; anda control unit configured to turn on L=M/N light sources of each of first through Nth light source groups during first through Nth time intervals, respectively, and successively irradiate the light from the on L light sources of the first through Nth light source groups in time division onto first through N illuminating areas forming the illuminating region,where M and N are natural numbers greater than or equal to 2, and L is a natural number greater than or equal to 1.2. The illumination device as claimed in claim 1 , wherein an area of the illuminating region is greater than an area occupied by the diffraction optical element and the M light sources on a plane parallel to the surface of the substrate.3. The illumination device as claimed in claim 1 , wherein a light intensity distribution in the illuminating region formed by combining the first through Nth illuminating areas is uniform.4. The illumination device as claimed in claim 1 , wherein the first through Nth illuminating areas ...

Подробнее
Номер записи: 85
05-05-2022 дата публикации

METHODS AND SYSTEMS FOR GENERATING VIRTUAL CONTENT DISPLAY WITH A VIRTUAL OR AUGMENTED REALITY APPARATUS

Номер: US20220137404A1
Автор: KLUG Michael, Tekolste Robert D.
Принадлежит: Magic Leap, Inc.

Several unique configurations for interferometric recording of volumetric phase diffractive elements with relatively high angle diffraction for use in waveguides are disclosed. Separate layer EPE and OPE structures produced by various methods may be integrated in side-by-side or overlaid constructs, and multiple such EPE and OPE structures may be combined or multiplexed to exhibit EPE/OPE functionality in a single, spatially-coincident layer. Multiplexed structures reduce the total number of layers of materials within a stack of eyepiece optics, each of which may be responsible for displaying a given focal depth range of a volumetric image. Volumetric phase type diffractive elements are used to offer properties including spectral bandwidth selectivity that may enable registered multi-color diffracted fields, angular multiplexing capability to facilitate tiling and field-of-view expansion without crosstalk, and all-optical, relatively simple prototyping compared to other diffractive element forms, enabling rapid design iteration.

Подробнее
Номер записи: 86
05-05-2022 дата публикации

PHASE STRUCTURE ON SURFACE-RELIEF GRATING-BASED WAVEGUIDE DISPLAY

Номер: US20220137410A1
Автор: Huang Ningfeng, Lam Wai Sze Tiffany, Lee Hee Yoon
Принадлежит:

A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.

Подробнее
Номер записи: 87
05-05-2022 дата публикации

Phase structure on volume bragg grating-based waveguide display

Номер: US20220137411A1
Автор: Dominic Meiser, Wai Sze Tiffany Lam, Wanli Chi, Yang Yang
Принадлежит: Meta Platforms Technologies LLC

A waveguide display includes a substrate transparent to visible light, a first grating on the substrate and configured to couple display light into or out of the substrate, and a phase structure on the substrate and configured to change a polarization state of the display light after or before the display light reaches the first grating. The first grating is characterized by a polarization-dependent diffraction efficiency. The first grating includes, for example, a surface-relief grating or a volume Bragg grating.

Подробнее
Номер записи: 88
19-03-2020 дата публикации

ILLUMINATION DEVICE

Номер: US20200088379A1
Автор: Kurashige Makio, NISHIO Shumpei
Принадлежит: Dai Nippon Printing Co., Ltd.

The invention enables a desired projection pattern on a surface to be illuminated, and enables a projection position and/or a projection orientation of the projection pattern to be changed. A laser beam is shaped into a parallel light, and an incident surface of a diffraction optical element recording a hologram image is irradiated with the parallel light. A projection pattern of an arrow oriented in a predetermined direction is projected as a hologram reconstructed image on a surface to be illuminated. An optical-element drive unit rotates the diffraction optical element about a rotation axis in a rotation plane orthogonal to an optical axis of a parallel incident light. By means of the rotation, a geometric positional relationship of the diffraction optical element with respect to the surface to be illuminated is changed, whereby an orientation of the arrow projection pattern on the surface can be changed. 1. An illumination device that projects a desired projection pattern on a surface to be illuminated , comprising:a light source;a diffraction optical element that diffracts a light from the light source and projects the projection pattern on the surface to be illuminated; andan optical-element drive unit that supports the diffraction optical element and drives the same;wherein the optical-element drive unit determines a rotation axis orthogonal to a rotation plane including an incident surface of the diffraction optical element, and rotates the diffraction optical element about the rotation axis.2. The illumination device according to claim 1 , whereinthe light source has a light emission unit that generates a light beam, and an optical shaping system that broadens the light beam to generate a parallel incident light, and causes the parallel incident light to be incident on the incident surface of the diffraction optical element.3. The illumination device according to claim 2 , wherein:the diffraction optical element is disposed such that its incident surface is ...

Подробнее
Номер записи: 89
26-06-2014 дата публикации

Film and Method for Producing Same

Номер: US20140177057A1
Автор: Bezold Hans Peter, Brehm Ludwig, Geim Dieter
Принадлежит: LEONHARD KURZ STIFTUNG & CO. KG

The invention relates to a film () and a process for its production. The film () comprises a light-permeable replication lacquer layer () with a diffractive relief structure () formed in a first side () of the replication lacquer layer (), a light-permeable colour lacquer layer (), formed only in areas, arranged on the relief structure (), and a reflective layer (), formed at least in areas, arranged on the first side () of the replication lacquer layer (). In areas () of the film () where the colour lacquer layer () and the reflective layer () overlap, the colour lacquer layer () is arranged between the replication lacquer layer () and the reflective layer (). 123-. (canceled)24. A film comprising:a light-permeable replication lacquer layer with a diffractive relief structure formed in a first side of the replication lacquer layer;a light-permeable colour lacquer layer, formed only in areas, arranged on the relief structure; and wherein, in areas of the film in which the colour lacquer layer and the reflective layer overlap, the colour lacquer layer is arranged between the replication lacquer layer and the reflective layer and', 'wherein the colour lacquer layer is formed in a pattern or as a grid, and', 'wherein:', 'i) adjacent pattern or grid elements of the colour lacquer layer have a reciprocal distance which lies in a range of from 50 to 250 μm, and/or', 'ii) a line width, a dot diameter or an individual element diameter of the pattern or grid elements lies in a range of from 50 to 250 μm., 'a reflective layer, formed at least in areas, arranged on the first side of the replication lacquer layer,'}25. A film according to claim 24 , wherein the colour lacquer layer has a thickness in a range of from 0.1 to 6 μm.26. A film according to claim 24 , wherein the overlaying of the surface of the relief structure with the colour lacquer layer lies in a range of from 5 to 95% claim 24 , of the whole surface of the relief structure.27. A film according to claim 24 , ...

Подробнее
Номер записи: 90
16-04-2015 дата публикации

METHOD OF PROVIDING MARKINGS TO PRECIOUS STONES INCLUDING GEMSTONES AND DIAMONDS, AND MARKINGS AND MARKED PRECIOUS STONES MARKED ACCORDING TO SUCH A METHOD

Номер: US20150101365A1
Автор: CHING Ho, HUI Koon Chung, TANG Wing Chi
Принадлежит:

An identifiable mark on a portion of a polished facet of a surface of an article and being identifiable by an optical magnifying viewing device, said identifiable mark comprising a nano-structure formed by a two-dimensional or a three-dimensional lattice of a plurality of discrete nanometer sized recessed or protruded entities, wherein said entities are arranged within a predefined region of said polished facet in a predetermined arrangement in relation to each other and such that an outer interface surface between the facet of the article and air is formed and an inner interface surface between the facet of the article and air is formed. Said predetermined arrangement of said entities is non-uniform and non-periodic arrangement, and wherein said entities are sized and shaped so as to cause optical scattering upon reflection of incident light and the distance from the inner interface surface to the outer interface surface is greater than the amplitude of the non-marked portion of said polished face. Upon reflection of incident light having one or more predetermined wavelengths by said lattice at a predetermined angle of incidence to said lattice, interference due to scattering of light from said lattice is induced such that said reflected light has a variation in intensity providing one or more local maxima of one or more wavelengths. Said mark is identifiable by way of an optical magnifying viewing device inclined at a requisite viewing angle such that a local maxima is detected. 1. An identifiable mark on a portion of a polished facet of a surface of an article and being identifiable by an optical magnifying viewing device , said identifiable mark comprising:a nano-structure formed by a two-dimensional or a three-dimensional lattice of a plurality of discrete nanometer sized recessed or protruded entities, wherein said entities are arranged within a predefined region of said polished facet in a predetermined arrangement in relation to each other, and such that an ...

Подробнее
Номер записи: 91
05-04-2018 дата публикации

Imaging Device and Imaging Method

Номер: US20180095200A1
Автор: Nakamura Yusuke, SHIMANO Takeshi
Принадлежит:

An imaging device includes: a modulator with a first pattern, which is configured to modulate light intensity; an image sensor configured to convert light passing through the modulator to image data, and output the image data; and an image processing unit configured to restore an image on the basis of cross-correlation operation with the image data and pattern data that represents a second pattern. 1. An imaging device comprising:a modulator comprising a first pattern, the modulator configured to modulate light intensity;an image sensor configured to convert light passing through the modulator to image data, and output the image data; andan image processing unit configured to restore an image on the basis of cross-correlation operation with the image data and pattern data that represents a second pattern.2. The imaging device according to claim 1 , wherein the second pattern has a pattern similar to the first pattern.3. The imaging device according to claim 1 , wherein the cross-correlation operation is based on convolution operation with the image data and the pattern data.4. The imaging device according to claim 1 , wherein the cross-correlation operation is based on multiplication operation with the Fourier transformed image data and the Fourier transformed pattern data.5. The imaging device according to claim 1 , further comprising a focusing unit configured to enlarge and reduce the pattern data.6. The imaging device according to claim 1 , further comprising a modulation control unit configured to switch multiple patterns that differ in initial phase at the modulator in a time-division manner claim 1 ,wherein the image processing unit changes an initial phase of the pattern data in response to initial phase switching of the modulation control unit.7. The imaging device according to claim 1 , wherein the modulator has multiple patterns that differ in initial phase claim 1 , andthe image processing unit has the pattern data with different initial phases ...

Подробнее
Номер записи: 92
28-03-2019 дата публикации

METHODS AND SYSTEMS FOR GENERATING VIRTUAL CONTENT DISPLAY WITH A VIRTUAL OR AUGMENTED REALITY APPARATUS

Номер: US20190094536A1
Автор: KLUG Michael, Tekolste Robert D.
Принадлежит: Magic Leap, Inc.

Several unique configurations for interferometric recording of volumetric phase diffractive elements with relatively high angle diffraction for use in waveguides are disclosed. Separate layer EPE and OPE structures produced by various methods may be integrated in side-by-side or overlaid constructs, and multiple such EPE and OPE structures may be combined or multiplexed to exhibit EPE/OPE functionality in a single, spatially-coincident layer. Multiplexed structures reduce the total number of layers of materials within a stack of eyepiece optics, each of which may be responsible for displaying a given focal depth range of a volumetric image. Volumetric phase type diffractive elements are used to offer properties including spectral bandwidth selectivity that may enable registered multi-color diffracted fields, angular multiplexing capability to facilitate tiling and field-of-view expansion without crosstalk, and all-optical, relatively simple prototyping compared to other diffractive element forms, enabling rapid design iteration. 1. An apparatus for generating stereoscopic images for virtual reality and/or augmented reality , comprising:an in-coupling optical device to receive input light beams;first diffractive elements in the apparatus to deflect a propagation direction of a first portion of the input light beams from the in-coupling optical device into a first direction toward second diffractive elements; andan eyepiece to propagate a second portion of the input light beams through the second diffractive elements having a second orientation to produce stereoscopic images on one or more focal planes to an observer.2. The apparatus of claim 1 , wherein the second diffractive elements comprise exit pupil expansion structures or expanders claim 1 , and the first diffractive elements comprise orthogonal pupil expansion structures or expanders.3. The apparatus of claim 1 , wherein the first diffractive elements or the second diffractive elements include a host medium ...

Подробнее
Номер записи: 93
13-04-2017 дата публикации

IMAGE DISPLAY AND LABELED DEVICE

Номер: US20170100956A1
Автор: Gocho Satoshi, HAYASHI Takayoshi, KISHIMOTO Yasushi, NAGANO Akira, Toda Toshiki
Принадлежит: TOPPAN PRINTING CO., LTD.

An image display according to an embodiment includes a first image-displaying portion that displays first information about a certain object as a first image of object color, and a second image-displaying portion that displays second information about the object as a second image of structural color provided by a relief structure, the relief structure including at least one structure selected from the group consisting of diffraction grating, hologram, and light-scattering structure having an anisotropic light-scattering property. According to an example, the object is a person, and the first image includes a facial image of the person. A labeled article according to another embodiment includes the image display, and a substrate supporting the image display. 1. A labeled article comprising:an image display; anda substrate supporting the image display,wherein the image display comprises:a first image-displaying portion that displays first information about a certain object as a first image of object color; an underlayer, the second image-displaying portion being provided on the underlayer, wherein', 'a reflection layer is formed on the at least a part of the surface of the relief structure, the reflection layer being made of metal, metal oxide, or intermetallic compound,, 'a second image-displaying portion that displays second information about the object as a second image of structural color provided by a relief structure, the relief structure including at least one structure selected form the group consisting of diffraction grating and hologram; and'}the second image-displaying portion is made of a plurality of dot-shaped portions arranged in a two-dimensional manner,the object is a person, the first image includes a facial image of the person, and the second image includes a same facial image as the facial image included in the first image, and a relief structure formation layer facing the underlayer and having the relief structure on a surface thereof that faces ...

Подробнее
Номер записи: 94
26-03-2020 дата публикации

BROADBAND ACHROMATIC FLAT OPTICAL COMPONENTS BY DISPERSION-ENGINEERED DIELECTRIC METASURFACES

Номер: US20200096672A1
Автор: Overvig Adam, Shrestha Sajan, Yu Nanfang
Принадлежит: The Trustees of Columbia University in the City of New York

Techniques for creating a replacement for optical elements with diffractive planar components based on metasurfaces are provided. In one example, a substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase is provided. 1. A substantially flat optical component for lensing incoming electromagnetic radiation having at least one wavelength and a first phase into outgoing electromagnetic radiation having a second phase , comprising:a substrate; andat least one metasurface, coupled to the substrate, comprising a plurality of optical meta-units to change at least the first phase to the second phase;wherein each optical meta-unit of the plurality of optical meta-units is positioned at a distance that is less than the wavelength from at least a different optical meta-unit;wherein the flat optical component is adapted to correct both chromatic and monochromatic aberrations across the wavelength.2. The system of claim 1 , wherein each of the plurality of meta-units comprises a meta-unit having a shape to diffractively scatter the electromagnetic radiation.3. The system of claim 2 , wherein the shape comprises an archetype shape having one or more varying geometrical parameters.4. The system of claim 2 , wherein each of the plurality of meta-units is configured to provide a range of optical phase offset and phase dispersion for a broadband achromatic metasurface lens.5. The system of claim 2 , wherein each of the plurality of meta-units is configured to provide a range of scattering amplitude for a broadband achromatic metasurface lens.6. The system of claim 1 , wherein each of the plurality of meta-units comprises a dielectric material.7. The system of claim 6 , wherein the dielectric material is selected from the group consisting of silicon claim 6 , silicon nitride claim 6 , gallium nitride claim 6 , and titanium dioxide.8. The system of ...

Подробнее
Номер записи: 95
26-03-2020 дата публикации

INNOVATIVE SOLUTIONS FOR IMPROVING LASER DAMAGE PERFORMANCE OF MULTI-LAYER DIELECTRIC GRATINGS

Номер: US20200096684A1
Автор: Nguyen Hoang T.
Принадлежит: Lawrence Livermore National Security, LLC

Optical thin film designs are provided that achieve significantly improved laser damage thresholds and ultra-low-loss. These advances may be achieved by utilizing materials with electronic band gaps and refractive indices that are higher than those that are conventionally used. 1. An apparatus , comprising:a substrate; anda plurality of layers on said substrate, wherein at least one layer of said layers comprises material with an electronic band gap that is at least 6.0 eV and an index of refraction that is at least 1.8.2. The apparatus of claim 1 , wherein at least one layer of said layers comprises a dielectric material claim 1 , wherein each layer of said plurality of layers comprises either a high refractive index dielectric material or a low refractive index dielectric material claim 1 , wherein said high refractive index dielectric material and said low refractive index dielectric material comprise a difference in refractive index greater than 0.1 claim 1 , wherein said plurality of layers comprises a top layer and a bottom layer claim 1 , wherein said bottom layer is affixed to said substrate.3. The apparatus of claim 1 , wherein said material is selected from the group consisting of diamond claim 1 , aluminum nitride claim 1 , boron nitride claim 1 , magnesium oxide claim 1 , # yttrium oxide and scandium oxide.4. The apparatus of claim 1 , wherein said apparatus comprises a multi-layer dielectric (MLD) grating.5. The apparatus of claim 1 , wherein said apparatus comprises a multilayer dielectric stack.6. The apparatus of claim 1 , wherein said apparatus comprises a quarter-wave stack.7. The apparatus of claim 1 , wherein said apparatus is selected from the group comprising a highly reflecting laser mirror claim 1 , a partially transmissive output coupler claim 1 , a dichroic mirror claim 1 , an optical filter claim 1 , a beam splitter claim 1 , a heat reflector claim 1 , a solar cell cover claim 1 , a thin-film polarizer claim 1 , a Bragg mirror and a Rugate ...

Подробнее
Номер записи: 96
26-03-2020 дата публикации

METHOD FOR PRODUCING A REFLECTIVE OPTICAL ELEMENT, REFLECTIVE OPTICAL ELEMENT, AND USE OF A REFLECTIVE OPTICAL ELEMENT

Номер: US20200096874A1
Автор: Anderl Willi, Bauer Markus, Bingel Ulrich
Принадлежит:

The disclosure provides a method that includes filling a cavity in a substrate with a second material, wherein the substrate includes a first material. The method also includes using galvanic and/or chemical deposition of a third material to apply an overcoating to a first surface of the substrate in a region of the cavity. The method further includes removing the second material from the cavity. In addition, the method includes, before or after removing the second material from the cavity, applying a reflective layer to the overcoating. The disclosure also provides related optical articles and systems. 113.-. (canceled)14. An optical element , comprising:a substrate;an overcoating comprising a galvanically or chemically deposited layer on a first surface of the substrate;a cavity configured to receive a fluid; anda reflective layer comprising an optically effective surface, the cavity is near the first surface of the substrate;', 'the overcoating extends over the cavity;', 'the cavity is free of material of the overcoating; and', 'the reflective layer is on a surface of the overcoating that faces away from the substrate., 'wherein15. The optical element of claim 14 , wherein the cavity comprises at least one channel.16. The optical element of claim 14 , wherein cavity comprises a plurality of channels claim 14 , and the channels have a width which is in the range from a few micrometers to around one millimeter.17. The optical element of claim 14 , wherein the cavity comprises an opening that leads into the optically effective surface of the reflective layer.18. The optical element of claim 14 , wherein the substrate comprises steel claim 14 , a copper alloy and/or aluminum-silicon.19. The optical element of claim 14 , wherein the overcoating comprises copper claim 14 , nickel and/or nickel with phosphorus.20. The optical element of claim 14 , wherein the materials of the substrate and of the overcoating have an at least approximately identical coefficient of ...

Подробнее
Номер записи: 97
13-04-2017 дата публикации

Reducing stray light transmission in near eye display using resonant grating filter

Номер: US20170102544A1
Автор: Tuomas Vallius
Принадлежит: Microsoft Technology Licensing LLC

A near eye optical display system comprising a waveguide and diffractive optical elements (DOEs) for in-coupling, exit pupil expansion, and out-coupling reduces the transmission of stray light in the system using a doubly-periodic surface relief microstructure that combines a guided-mode resonant filter with Bragg reflectance. Such resonant grating filter may be configured with grooves and/or ridges of different widths that are located on the waveguide that have respective sub-periods that match Bragg reflectance periods for particular wavelengths. The interaction of the sub-periods gives rise to a photonic band gap effect in which the resonant grating's effective refractive index is modulated to increase angular sensitivity and wavelength bandwidth of the resonant grating filter. The sub-periods define an overall period (i.e., a super period) for the resonant grating filter by which incident light is coupled into the waveguide, guided, and then coupled out of the waveguide at the side of incidence.

Подробнее
Номер записи: 98
19-04-2018 дата публикации

DISPLAY AND LABELED ARTICLE

Номер: US20180104975A1
Автор: MITSUI Kazunari, NAGANO Akira, Nishihara Takashi
Принадлежит: TOPPAN PRINTING CO., LTD.

A display includes one or more first relief structures. Each of the one or more first relief structures consists of a smooth first reflection surface and a plurality of protrusions or recesses, each top surface of the protrusions or each bottom of the recesses is a smooth second reflection surface parallel to the first reflection surface, each of the one or more first relief structures is configured to display a color as a structural color by emitting a plurality of wavelength components of visible light wavelengths in the same direction, and each of the second reflection surfaces has a height or depth relative to the first reflection surface in a range of 0.1 to 0.5 μm. 1. A display comprising:one or more first relief structures, whereineach of the one or more first relief structures consists of a smooth first reflection surface and a plurality of protrusions or recesses,each top surface of the protrusions or each bottom of the recesses is a smooth second reflection surface parallel to the first reflection surface,each of the one or more first relief structures is configured to display a color as a structural color by emitting a plurality of wavelength components of visible light wavelengths in the same direction,each of the second reflection surfaces has a height or depth relative to the first reflection surface in a range of 0.1 to 0.5 μm, and the second reflection surfaces all have the same shape and dimensions as each other, and are arranged at a regular center-to-center distance along a first direction and at a regular center-to-center distance along a second direction substantially perpendicular to the first direction,', 'each of the second reflection surfaces has a length and a width in a range of 5 to 10 μm, and', {'b': 1', '1, 'a ratio S/S of an area S of an orthogonal projection of the first reflection surface on a plane parallel to the first reflection surface to an area S of an orthogonal projection of the first relief structure on the plane is in a ...

Подробнее
Номер записи: 99
29-04-2021 дата публикации

JEWELRY IMAGE PROJECTION AND METHOD

Номер: US20210120922A1
Автор: Lansdorp Bob Michael
Принадлежит:

An article of jewelry comprising; a frame; and a decorative element secured within the frame, wherein two-dimensional array of optical phase shifting structures is embedded in the decorative element; wherein the two-dimensional array of optical phase shifting structures project an image when illuminated with a light source. 1. An article of jewelry comprising:a frame;a decorative element having at least one surface, wherein the decorative element is secured within the frame; anda phase mask is embedded in the decorative element on the at least one surface, wherein the phase mask is a two-dimensional array of optical phase shifting structures.2. The article of jewelry of claim 1 , wherein the decorative element is transparent.3. The article of jewelry of claim 1 , wherein the phase mask is comprised of a plurality of altered sections and unaltered sections of the decorative element.4. The article of jewelry of claim 3 , wherein the altered sections are of all substantially the same depth.5. The article of jewelry of claim 1 , wherein the at least one surface of the decorative element is a reflective surface. This application is a continuation of U.S. application Ser. No. 16/409,794 filed May 11, 2019 and 62/670,836 filed May 13, 2018. The disclosure of the prior applications is considered part of (and is incorporated by reference in) the disclosure of this application.The present invention relates to device for image projection, and more particularly to an article of jewelry with an image embedded in the article of jewelry which when illuminated projects an image.Precious stones have been used as gifts and stores of value. Diamonds are commonly used in engagement rings due to the high hardness and stability. Furthermore, each diamond is thought to be unique and therefore has symbolic value, for example for couples that are preparing for marriage.However, the environmental impact of diamond mining, and the social conflicts caused by the pursuit of the stones has led ...

Подробнее
Номер записи: 100