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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

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Мониторинг СМИ

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

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 1949. Отображено 100.
03-05-2012 дата публикации

Holographic Sensor

Номер: US20120107944A1
Автор: Abid Hussain, Christopher Robin Lowe, Felicity Kate Sartain, Jeffrey Blyth, Mei-Ching Lee, Satyamoorthy Kabilan, Xiaoping Yang
Принадлежит: Individual

A sensor for the detection of an analyte comprising a cis-diol moiety, which comprises a holographic element comprising a medium and a hologram disposed throughout the volume of the medium, wherein an optical characteristic of the element changes as a result of a variation of a physical property occurring throughout the volume of the medium, and wherein the medium is a polymer comprising a group of formula (i) wherein n is 0, 1, 2, 3 or 4; each X (if present) is independently is an atom or group which, via an electronic effect, promotes formation of a tetrahedral geometry about the boron atom; and Y is a spacer which, when n is 0 or otherwise optionally, is an atom or group which, via an electronic effect, promotes formation of a tetrahedral geometry about the boron atom. Such a sensor may be used for the detection of glucose.

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Номер записи: 1
13-09-2012 дата публикации

Photopolymer formulation having different writing comonomers

Номер: US20120231377A1
Автор: Dennis Hönel, Friedrich-Karl Bruder, Jorg Hofmann, Marc-Stephan Weiser, Thomas Fäcke, Thomas Rölle
Принадлежит: Individual

The invention relates to a photopolymer formulation comprising matrix polymers, writing monomers, and photo initiators, comprising a combination of at least two different writing monomers. The invention further relates to the use of the photopolymer formulation for producing optical elements, in particular for producing holographic elements and images, to a method for producing the photopolymer formulation and to a method for illuminating holographic media made of the photopolymer formulation.

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Номер записи: 2
20-09-2012 дата публикации

Selection method for additives in photopolymers

Номер: US20120237856A1
Автор: Christian Diedrich, Dennis Hönel, Friedrich-Karl Bruder, Marc-Stephan Weiser, Thomas Fäcke, Thomas Rölle
Принадлежит: Bayer Intellectual Property GmbH

The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.

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Номер записи: 3
15-11-2012 дата публикации

Holographic sensor

Номер: US20120288785A1
Автор: Hosam Sherif, Izabela Naydenova, Raghavendra Jallapuram, Suzanne Martin, Vincent Toal
Принадлежит: Dublin Institute of Technology

A sensor device comprising a holographic element comprises a grating or hologram recorded in a holographic recording medium wherein at least one physical and/or chemical and/or optical characteristic of the holographic element or the image produced by it varies as a result of variation in relative humidity or moisture content in the air surrounding the element. Also provided is an acrylamide-based photopolymer and an acrylamide-based reflection hologram.

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Номер записи: 4
14-03-2013 дата публикации

Color holographic optical element

Номер: US20130065159A1
Автор: Hans I. Bjelkhagen, Jim Fischbach
Принадлежит: Intrepid World Communication Corp

A process for producing a color holographic optical element in a real-time interactive multi-channel auto-stereoscopic color image display system, including producing light comprising at least three different monochromatic parts of the optical spectrum from one or more lasers and illuminating a holographic plate with the light from different directions and recorded on a panchromatic light sensitive recording material coated on a suitable substrate.

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Номер записи: 5
29-08-2013 дата публикации

Photopolymer formulation for producing holographic media having highly crosslinked matrix polymers

Номер: US20130224634A1
Автор: Dennis Hönel, Friedrich-Karl Bruder, Horst Berneth, Marc-Stephan Weiser, Thomas Fäcke, Thomas Rölle
Принадлежит: Bayer Intellectual Property GmbH

The invention relates to a photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer, and a photoinitiator, containing a coinitiator and a dye having the formula F An, where F stands for a cationic dye and An″ stands for an anion, wherein the dye having the formula F An comprises a water absorption of =5%. The invention further relates to a holographic medium, in particular in the form of a film, containing a photopolymer formulation according to the invention, to the use of such a medium for recording holograms, and to a special dye that can be used in the photopolymer formulation according to the invention.

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Номер записи: 6
26-12-2013 дата публикации

Photorefractive composition comprising electrolytes in a photorefractive layer and method of making thereof

Номер: US20130341573A1
Автор: Alla SUTIN, Jie Cai, Michiharu YAMAMOTO, PENG Wang, Tao Gu, Wan-Yun Hsieh, Weiping Lin, Yufen HU
Принадлежит: Nitto Denko Corp

A photorefractive composition and a photorefractive device comprising the composition are disclosed. The composition is configured to be photorefractive upon irradiation by a laser having a wavelength in the visible light spectrum and comprises a polymer, a non linear optical chromophore, a plasticizer, and an electrolyte. In an embodiment, the percentage of polymer recurring units that comprise a charge transport moiety is less than 30%. In an embodiment, the electrolyte comprises one or more of ammonium salts, heterocyclic ammonium salts, and phosphonium salts. In an embodiment, the polymer is selected from the group consisting of polycarbonate, polyurea, polyurethane, poly(meth)acrylate, polyester, polyimide, and combinations thereof. Preferably, the composition has a diffraction efficiency of about 25% or greater upon irradiation with a visible light laser.

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Номер записи: 7
23-01-2014 дата публикации

Freeform holographic imaging apparatus and method

Номер: US20140022617A1
Автор: John Hazen, Larry Hoague
Принадлежит: Hazen Paper Co

A freeform holographic imaging apparatus includes an imaging table for supporting a substrate, an imaging beam positioned adjacent to the imaging table; and a controller operatively connected to the imaging beam and configured to control a position of the imaging beam with respect to the imaging table. The controller is configured to control the imaging beam to image first and second holographic optical elements on the substrate, wherein each of the first and second holographic optical elements are a single pixel. The first holographic optical element is imaged according to a first parameter set and the second holographic optical element is imaged according to a second parameter set.

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Номер записи: 8
20-03-2014 дата публикации

Holographic polymer dispersed liquid crystals

Номер: US20140080040A1
Автор: Adam K. Fontecchio, Kashma Rai
Принадлежит: DREXEL UNIVERSITY

A hyperspectral holographic polymer dispersed liquid crystal (HPDLC) medium comprising broadband reflective properties may comprise dopants that result in a hyperspectral HPDLC with fast transitional switching speeds. Dopants may include alliform carbon particles, carbon nanoparticles, piezoelectric nanoparticles, multiwalled carbon nanotubes, a high dielectric anisotropy compound, semiconductor nanoparticles, electrically conductive nanoparticles, metallic nanoparticles, or the like. A technique for fabrication of hyperspectral broadband HPDLC mediums may involve dynamic variation of the holography setup during HPDLC formation and spatial multiplexing that may enable broadening of the HPDLC medium's wavelength response. Fabrication may include concurrently running multiple exposures and exploiting superpositioning of the resultant gratings. The hyperspectral HPDLC may be capable of blocking and/or filtering wavelengths in the range of approximately 390 nm to approximately 12 μm.

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Номер записи: 9
03-04-2014 дата публикации

Fabrication of high efficiency, high quality, large area diffractive waveplates and arrays

Номер: US20140092373A1
Автор: Brian R. Kimball, Diane M. Steeves, Nelson V. Tabirian, Sarik R. Nersisyan
Принадлежит: US Department of Army

An apparatus and method is presented for fabricating high quality one- or two dimensional diffractive waveplates and their arrays that exhibit high diffraction efficiency over large area and being capable of inexpensive large volume production. Employed is a generally non-holographic and aperiodic polarization converter for converting the polarization of a coherent input light beam that may be of a visible wavelength into a pattern of continuous spatial modulation at the output of said polarization converter. A photoresponsive material characterized by an anisotropy axis that may be formed or aligned according to polarization of said light beam is exposed to said polarization modulation pattern and may be coated subsequently with an anisotropic material overlayer.

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Номер записи: 10
07-01-2021 дата публикации

PHOTOPOLYMER COMPOSITION

Номер: US20210003919A1
Автор: CHANG Yeongrae, JANG Seokhoon, KHARBASH Raisa, KIM Heon, KIM Yoosik, KWON Se Hyun
Принадлежит:

The present disclosure relates to a photopolymer composition, and more particularly, to a compound having a novel structure, a photopolymer composition including the compound as a dye, a hologram recording medium produced from the photopolymer composition, an optical element including the hologram recording medium, and a holographic recording method using the photopolymer composition. 2. The compound according to claim 1 ,{'sup': '−', 'the An is a halide ion, a cyano ion, an alkoxy ion having 1 to 30 carbon atoms, an alkoxycarbonyl ion having 1 to 30 carbon atoms, a sulfonate ion, an alkyl-sulfonate ion having 1 to 30 carbon atoms, a substituted or unsubstituted aromatic sulfonate ion having 6 to 30 carbon atoms, an alkyl sulfate ion having 1 to 30 carbon atoms, a sulfate ion, or a substituted or unsubstituted aromatic sulfate ion having 6 to 30 carbon atoms.'}3. The compound according to claim 1 ,wherein in the Chemical Formula 1,X is silicon (Si),n and m are each 1,{'sub': 1', '2, 'Zand Zare each nitrogen (N),'}{'sub': 1', '12, 'Rto Rare identical to or different from each other, and each is hydrogen, an alkyl group having 1 to 20 carbon atoms; or a halogen group,'}{'sub': '1', 'Aris an aromatic divalent functional group having 6 to 20 carbon atoms to which at least one hydrogen, an alkyl group having 1 to 20 carbon atoms or halogen group is bonded, and'}{'sub': '1', 'claim-text': {'br': None, 'sub': 2', '2, '—Y—Ar\u2003\u2003[Chemical Formula 2]'}, 'Yis a functional group represented by Chemical Formula 2.'}in the Chemical Formula 2,{'sub': '2', 'Yis an ether group or an ester, and'}{'sub': '2', 'Aris an aliphatic functional group having 1 to 20 carbon atoms or an aromatic functional group having 6 to 20 carbon atoms substituted with one or more halogen groups.'}4. A photopolymer composition comprising:a polymer matrix or a precursor thereof;{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a dye including the compound of ;'}a photoreactive monomer; anda ...

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Номер записи: 11
03-01-2019 дата публикации

OPTICAL DEVICES FOR AUTHENTICATION AND METHODS OF MAKING SAME

Номер: US20190004477A1
Автор: CODY Dervil, Martin Suzanne, MIKULCHYK Tatsiana, Naydenova Izabela, Toal Vincent, ZAWADZKA Monika
Принадлежит:

The invention optical device comprising a self-processing photopolymer material configured to produce a variable two- or three- dimensional diffraction pattern when said material is illuminated by a light source. The invention provides a new material science and process technology which produces a serialisable anti-counterfeit optical device, based on a self-processing photopolymer. 1. A fully transparent optical device comprising a self-processing photopolymer material patterned to diffract light from the volume of the material to generate a 2D or a 3D image when illuminated by a light source , wherein the optical device is patterned by using a single laser beam.2. The optical device of claim 1 , wherein the optical device is patterned by an in-line holographic recording of a spatially transformed wavefront.3. The optical device of claim 1 , wherein the photopolymer material comprises N-phenylglycine claim 1 , NPG claim 1 , glycerol triethanolamine claim 1 , TEA claim 1 , polyvinylalcohol claim 1 , PVA claim 1 , and one or more of the monomers N-isopropylacrylamide claim 1 , acrylamide or diacetone acrylamide.4. The optical device of claim 3 , wherein the device is a reflection type of device.5. The optical device of claim 3 , wherein the device comprises a reflective surface placed behind a transmission type of device claim 3 , wherein the reflective surface is in direct contact with the photopolymer material.6. The optical device of claim 5 , where the roughness of the reflective surface is of the order of 0.010 micrometres.7. (canceled)8. The optical device of claim 1 , wherein the device is a transmission type of device or a reflection volume hologram device.9. The optical device of claim 1 , wherein the photopolymer material is configured by the recording of a pattern onto the photopolymer material comprising the image or a computer generated hologram of the image to be generated by the device.10. The optical device of claim 9 , wherein the computer generated ...

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Номер записи: 12
23-01-2020 дата публикации

Head-Up Display

Номер: US20200026077A1
Автор: Christmas Jamieson, Karner Mate
Принадлежит:

There is provided a head-up display for a vehicle. The head-up display has a first housing and a second housing. The first housing comprises a picture generating unit and optical system. The second housing comprises a substantially flat cover glass and a layer. The picture generating unit is arranged to output pictures. The picture generating unit comprises a light source and a spatial light modulator. The light source is arranged to emit light. The spatial light modulator is arranged to receive the light from the light source and spatially-modulate the light in accordance with computer-generated light-modulation patterns displayed on the spatial light modulator to form a holographic reconstruction corresponding to each picture. The optical system is arranged to receive the pictures output by the picture generating unit and relay the pictures using an optical combiner to form a virtual image of each picture. The optical combiner combines light output by the picture generating unit with light from a real-world scene to present combined images to a viewer within an eye-box. The second housing is disposed between the first housing and optical combiner. The substantially flat cover glass is arranged to protect the first housing. The layer is arranged to change the trajectory of light such that any sunlight reflected by the cover glass is deflected away from the eye-box. 1. A head-up display for a vehicle , the head-up display having a first housing comprising:a picture generating unit arranged to output pictures, wherein the picture generating unit comprises: a light source arranged to emit light; and a spatial light modulator arranged to receive the light from the light source and spatially-modulate the light in accordance with computer-generated light-modulation patterns displayed on the spatial light modulator to form a holographic reconstruction corresponding to each picture; andan optical system arranged to receive the pictures output by the picture generating unit ...

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Номер записи: 13
28-01-2021 дата публикации

PHOTOPOLYMER COMPOSITION

Номер: US20210026239A1
Автор: CHANG Yeongrae, JANG Seokhoon, KHARBASH Raisa, KIM Heon, KIM Yoosik, KWON Se Hyun
Принадлежит:

Provided is a photopolymer composition for hologram recording comprising: 2. The photopolymer composition according to claim 1 ,{'sub': 1', '4, 'wherein in Chemical Formula 1, at least one of Rto Ris selected from the group consisting ofan alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing at least one of oxygen, sulfur or nitrogen;a cycloalkyl group having 4 to 20 carbon atoms; andan aromatic hydrocarbon group having 6 to 20 carbon atoms substituted with an alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing one or more of oxygen, sulfur or nitrogen.3. The photopolymer composition according to claim 1 ,wherein in Chemical Formula 1:{'sub': 2', '3, 'Rand Rare each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, or a halogen; and'}{'sub': 1', '4, 'one of Rand Ris an amine group and the other is selected from the group consisting ofan alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing at least one of oxygen, sulfur or nitrogen;a cycloalkyl group having 4 to 20 carbon atoms; andan aromatic hydrocarbon group having 6 to 20 carbon atoms substituted with an alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing at least one of oxygen, sulfur or nitrogen.4. The photopolymer composition according to claim 1 ,wherein in Chemical Formula 1:{'sub': 2', '3, 'Rand Rare each independently an alkoxy group having 1 to 5 carbon atoms; and'}{'sub': 1', '4, 'Rand Rare each independently selected from the group consisting ofan alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing at least one of oxygen, sulfur or nitrogen;a cycloalkyl group having 4 to 20 carbon atoms substituted with an alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing one or more of oxygen, sulfur or nitrogen; andan aromatic hydrocarbon group having 6 to 20 carbon atoms substituted with an alicyclic or aromatic heterocycle having 4 to 20 carbon atoms containing one or more ...

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Номер записи: 14
30-01-2020 дата публикации

Systems and Methods for Fabricating a Multilayer Optical Structure

Номер: US20200033801A1
Автор: GRANT Alastair John, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

Systems and methods for fabricating optical elements in accordance with various embodiments of the invention are illustrated. One embodiment includes a method for fabricating an optical element, the method including providing a first optical substrate, depositing a first layer of a first optical recording material onto the first optical substrate, applying an optical exposure process to the first layer to form a first optical structure, temporarily erasing the first optical structure, depositing a second layer of a second optical recording material, and applying an optical exposure process to the second layer to form a second optical structure, wherein the optical exposure process includes using at least one light beam traversing the first layer. 1. A method of fabricating an optical element , the method comprising:providing a first optical substrate;depositing a first layer of a first optical recording material onto the first optical substrate;applying an optical exposure process to the first layer to form a first optical structure;temporarily erasing the first optical structure;depositing a second layer of a second optical recording material; andapplying an optical exposure process to the second layer to form a second optical structure, wherein the optical exposure process comprises using at least one light beam traversing the first layer.2. The method of claim 1 , further comprising:providing a second optical substrate, wherein the second layer is deposited onto the second optical substrate; andoverlapping the second optical substrate with the first optical substrate.3. The method of claim 2 , wherein the second optical substrate is laterally or rotationally displaced relative to the first optical substrate.4. The method of claim 1 , further comprising:applying a first cover layer to the first layer; andapplying a second cover layer to the second layer.5. The method of claim 1 , wherein the at least one light beam is provided by an apparatus selected from the ...

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Номер записи: 15
30-01-2020 дата публикации

Method for Holographic Mastering and Replication

Номер: US20200033802A1
Автор: Alastair John Grant, Jonathan David Waldern, Milan Momcilo Popovich
Принадлежит: DigiLens Inc

A method for producing holograms with a multiplicity of holographic prescriptions from a single master is provided. A multiplicity of holographic substrates each containing a first hologram is stacked on a second holographic recording medium substrate. The first hologram is designed to diffract light from a first direction into a second direction. When expose to illumination from the first direction zero order and diffracted light from each first hologram interfere in the second holographic recording medium substrate forming a second hologram. The second hologram is then copied into a third holographic recording medium substrate to provide the final copy hologram.

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Номер записи: 16
04-02-2021 дата публикации

PATTERNED ANISOTROPIC FILMS AND OPTICAL ELEMENTS THEREWITH

Номер: US20210033770A1
Автор: FENG Xiayu, Lee Yun-Han, LI Ryan, Lu Lu, Silverstein Barry David, WANG Junren, WANG Mengfei, YU Hao
Принадлежит:

A first layer of anisotropic material extends along a first plane and includes anisotropic components being parallel to a second plane non-parallel and non-perpendicular to the first plane. The anisotropic components are arranged in cycloidal or helical patterns. The cycloidal or helical patterns define one or more Bragg planes that are non-parallel and non-perpendicular to the first plane and either substantially parallel or substantially perpendicular to the second plane. 1. An optical element , comprising:a first layer of anisotropic material extending along a first plane and including cycloidal or helical patterns non-parallel and non-perpendicular to the first plane, wherein the cycloidal or helical patterns of the anisotropic material define one or more Bragg planes that are either substantially parallel or substantially perpendicular to the cycloidal or helical patterns.2. The optical element of claim 1 , wherein the optical element is one of: a grating claim 1 , a lens claim 1 , a beam splitter claim 1 , a beam deflector claim 1 , a disperser claim 1 , a wavefront modifier claim 1 , or an optical scanner.3. The optical element of claim 2 , wherein:the first layer of anisotropic material includes cycloidal patterns, the cycloidal patterns of the anisotropic material are substantially parallel to the one or more Bragg planes, and the optical element is a transmissive optical element.4. The optical element of claim 2 , wherein:the first layer of anisotropic material includes helical patterns, the helical patterns of the anisotropic material are substantially perpendicular to the one or more Bragg planes, and the optical element is a reflective optical element.5. The optical element of claim 2 , wherein:the first layer of anisotropic material includes a first region having a first cycloidal or helical pattern, the first pattern defining a first Bragg plane of the one or more Bragg planes for redirecting a first portion of first light to a first direction.6. The ...

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Номер записи: 17
07-02-2019 дата публикации

INTEGRATED OPTICAL CIRCUIT FOR HOLOGRAPHIC INFORMATION PROCESSING

Номер: US20190041796A1
Автор: Horst Folkert
Принадлежит:

An integrated optical circuit for holographic information processing is disclosed. The optical circuit comprises a photorefractive medium and two transmitter arrays. The transmitter arrays are adapted for locally changing the refractive index of the photorefractive medium for holographic encoding of the information in a working plane of the photorefractive medium by transmitting light via optical paths into the photorefractive medium such that an interference pattern is generated in the working plane. The optical paths and the working plane are arranged in a single optical plane. 1. An integrated optical circuit for holographic information processing , the integrated optical circuit comprising a photorefractive medium and two transmitter arrays , the two transmitter arrays being adapted for locally changing a refractive index of the photorefractive medium for holographic encoding of the holographic information in a working plane of the photorefractive medium by transmitting light via optical paths into the photorefractive medium such that an interference pattern is generated in the working plane , the optical paths and the working plane being arranged in a single optical plane , wherein each of the two transmitter arrays comprise an electrical input and an array of output waveguides , the array of output waveguides being adapted for transmitting the light into the photorefractive medium , each of the two transmitter arrays being adapted for modulating the light transmitted through the array of output waveguides based on an electrical modulation signal received through the electrical input in order to encode the holographic information.2. (canceled)3. The integrated optical circuit of claim 1 , being adapted for encoding the holographic information by simultaneously generating the interference pattern for at least two different combinations of an output waveguide of a first one of the two transmitter arrays and an output waveguide of a second one of the two ...

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Номер записи: 18
15-02-2018 дата публикации

Systems, articles, and methods for integrating holographic optical elements with eyeglass lenses

Номер: US20180045966A1
Автор: Lloyd Frederick Holland, Matthew Bailey
Принадлежит: Thalmic Labs Inc

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described.

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Номер записи: 19
22-02-2018 дата публикации

SYSTEMS, ARTICLES, AND METHODS FOR INTEGRATING HOLOGRAPHIC OPTICAL ELEMENTS WITH EYEGLASS LENSES

Номер: US20180052328A1
Автор: Bailey Matthew, Holland Lloyd Frederick
Принадлежит:

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described. 1. A method of adapting a lens for use in a wearable heads-up display , the method comprising:providing a lens having a concave surface; andapplying a photopolymer film to the concave surface of the lens, wherein the photopolymer film adopts a concave curvature at least approximately equal to a curvature of the concave surface of the lens.2. The method of wherein applying a photopolymer film to the concave surface of the lens includes:providing the photopolymer film;applying an optical adhesive to at least one surface selected from a group consisting of: the concave surface of the lens and a surface of the photopolymer film;pressing the concave surface of the lens and the surface of the photopolymer film together; andcuring the optical adhesive.3. The method of wherein pressing the concave surface of the lens and the surface of the photopolymer film together includes warming the photopolymer film to a temperature below about 80 degrees Celsius.4. The method of wherein applying the photopolymer film to the concave surface of the lens includes:applying the photopolymer film to a surface of a carrier;curving the carrier to ...

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Номер записи: 20
20-02-2020 дата публикации

Photosensitive Resin and Manufacturing Method Thereof

Номер: US20200055972A1
Автор: Qin Tina, WIENSCH Joshua D.
Принадлежит:

Various embodiments disclosed relate to photopolymerizable compositions that are suitable for making three-dimensional structures when exposed to laser light. 1. A composition comprising:at least one monomer or oligomer comprising urethane acrylate;at least one monomer comprising pentaerythritol acrylate;at least one polyester acrylate resin;at least one photo initiator; andthe polyester acrylate resin comprises one or more thiol groups.2. The composition of claim 1 , wherein the urethane acrylate comprises a urethane diacrylate.3. The composition of claim 2 , wherein the urethane diacrylate is an aliphatic urethane diacrylate.4. The composition of claim 1 , wherein the urethane acrylate is present in an amount of about 30 wt % to about 70 wt %.5. The composition of claim 1 , wherein the pentaerythritol acrylate comprises a pentaerythritol tetraacrylate.6. The composition of claim 5 , wherein the pentaerythritol tetraacrylate is ethoxylated.7. The composition of claim 1 , wherein the pentaerythritol acrylate is present in an amount of about 30 wt % to about 70 wt %.8. The composition of claim 1 , wherein the polyester acrylate resin is present in an amount of about 10 wt % to about 30 wt %.10. The composition of claim 9 , wherein Lis substituted or unsubstituted cyclopentadienyl.11. The composition of claim 10 , wherein Lis cyclopentadienyl.12. The composition of claim 9 , wherein Lis substituted aryl.15. The composition of claim 1 , wherein the photo initiator is present in an amount of from about 0.01 wt % to about 1 wt %.16. A method of polymerizing a composition claim 1 , comprising exposing the composition of to laser light.18. A method of making a polymerizable composition claim 1 , comprising:combining at least one monomer comprising urethane acrylate, at least one monomer comprising pentaerythritol acrylate, and at least one polyester acrylate resin to form a homogenous mixture;combining the homogenous mixture with a photo initiator to form an initial ...

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Номер записи: 21
01-03-2018 дата публикации

SYSTEMS, ARTICLES, AND METHODS FOR INTEGRATING HOLOGRAPHIC OPTICAL ELEMENTS WITH EYEGLASS LENSES

Номер: US20180059422A1
Автор: Bailey Matthew, Holland Lloyd Frederick
Принадлежит:

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described. 1. A method of manufacturing a lens for use in a wearable heads-up display , the method comprising:providing a front half portion of a lens;providing a rear half portion of the lens;providing a photopolymer film;applying an optical adhesive to at least one surface selected from a group consisting of: a surface of the front half portion of the lens, a surface of the rear half portion of the lens, and a surface of the photopolymer film;positioning the photopolymer film in between the front half portion of the lens and the rear half portion of the lens; andpressing the front half portion of the lens and the rear half portion of the lens together with the photopolymer film sandwiched therebetween.2. The method of claim 1 , further comprising:applying a curvature to the photopolymer film before positioning the photopolymer film in between the front half portion of the lens and the rear half portion of the lens.3. The method of claim 1 , further comprising:recording a hologram into the photopolymer film before positioning the photopolymer film in between the front half portion of the lens and the rear half portion of the lens, ...

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Номер записи: 22
02-03-2017 дата публикации

METHOD OF PRODUCING VOLUME HOLOGRAM LAMINATE

Номер: US20170060087A1
Автор: Azakami Minoru, Eto Koji, Hatori Sakurako, MAENO Yoshihito, OHTAKI Hiroyuki
Принадлежит:

A main object of the present invention is to provide a method of producing a volume hologram laminate which can regenerate a hologram image in an arbitrary wavelength by a simple process. To attain the object, the present invention provides a method of producing a volume hologram laminate using a volume hologram forming substrate which comprises: a substrate, a volume hologram layer formed on the substrate and containing a photopolymerizable material, a resin layer, formed on the substrate so as to contact to the volume hologram layer, containing a resin and a polymerizable compound, characterized in that the producing method comprises processes of: a hologram recording process to record a volume hologram to the volume hologram layer, a substance transit process of transiting the polymerizable compound to the volume hologram layer, and an after-treatment process of polymerizing the polymerizable compound. 1. A volume hologram laminate comprising:a substrate,a volume hologram layer formed on the substrate and containing a photopolymerizable compound, in which a volume hologram is recorded by forming an interference fringe, anda volume hologram-laminated part formed so as to contact to the volume hologram layer and comprising a resin layer which contains a photopolymerizable compound, and a transparent resin selected from the group consisting of a polymethyl methacrylate resin, a polyvinyl acetate resin, and a polyester resin,wherein an interference fringe is formed in the resin layer, and wherein a period of the interference fringe formed in the volume hologram layer is bigger than a period of the interference fringe formed in the resin layer, anda period of the interference fringe formed in the resin layer is constant in the entire resin layer.2. The volume hologram laminate according to claim 1 , wherein a transmittance in visible light range of the volume hologram laminate has at least 2 minimal transparent wavelengths.3. A volume hologram transfer foil comprising ...

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Номер записи: 23
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.

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Номер записи: 24
28-02-2019 дата публикации

Methods and Apparatus for Compensating Image Distortion and Illumination Nonuniformity in a Waveguide

Номер: US20190064735A1
Автор: GRANT Alastair John, He Sihui, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens, Inc.

Typical waveguides rely on total internal reflection between the outer surfaces of substrates, which can make them highly susceptible to beam misalignment caused by nonplanarity of the substrates. In the manufacturing of the glass sheets commonly used for substrates, ripples can occur during the stretching and drawing of glass as it emerges from a furnace. Although glass manufacturers try to minimize ripples using predictions from mathematical models, it is difficult to totally eradicate the problem from the glass manufacturing process. Typically, these beam misalignments manifest themselves as image distortions and non-uniformities in the output illumination from the waveguide. Many embodiments of the invention are directed toward optically efficient, low cost solutions to the problem of controlling output image quality in waveguides manufactured using commercially available substrate glass and to the problem of compensating the image distortions and non-uniformity of curved waveguides. 1. A waveguide comprising:a first substrate having first and second surfaces with a surface relief characteristic along a first direction on at least one of the surfaces of the first substrate;a second substrate having first and second surfaces with a surface relief characteristic along a second direction on at least one of the surfaces of the second substrate; andat least one optical layer for modifying at least one of phase, amplitude, and propagation direction of light in contact with the second surface of the first substrate and the first surface of the second substrate, wherein the first and second substrates are configured to confine light to a total internal reflection path.2. The waveguide of claim 1 , wherein the surface relief characteristic of the first substrate comprises a one-dimensional cyclic function.3. The waveguide of claim 1 , wherein the surface relief characteristics of the first and second substrates comprise one-dimensional cyclic functions offset by half a ...

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Номер записи: 25
11-03-2021 дата публикации

POLARIZATION DIFFRACTION ELEMENT AND VECTOR BEAM MODE DETECTION SYSTEM USING THE SAME

Номер: US20210072447A1
Автор: KAWATSUKI Nobuhiro, Ono Hiroshi, Sakai Takeya, SAKAMOTO Moritsugu
Принадлежит:

A polarization diffraction element comprising a film including a liquid crystalline material having photosensitivity, the film having at least one hologram recorded therein, and thereby having a property as a fork-shaped polarization grating having an anisotropic structure in which an optical axis continuously rotates toward a direction of a grating vector. 1. A polarization diffraction element comprisinga film including a liquid crystalline material having photosensitivity,the film having at least one hologram recorded therein,and thereby having a property as a fork-shaped polarization grating having an anisotropic structure in which an optical axis continuously rotates toward a direction of a grating vector.2. The polarization diffraction element as claimed in claim 1 ,wherein a plurality of polarization holograms is recorded in the film, andwhere each of the polarization holograms has the property as the fork-shaped polarization grating, and the direction of the grating vector and a topological charge applied to diffracted light are different from each other.4. A vector beam mode detection system comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the polarization diffraction element as claimed in ;'}single-mode optical fibers having light-incident end faces located in ±1st-order diffraction directions of the polarization grating formed by at least one polarization hologram recorded in the polarization diffraction element; anda photodetector configured to detect light guided through the single-mode optical fibers, whereinlight converted to Gaussian beam by the polarization diffraction element is detected through the single-mode optical fibers, thereby detecting a mode of a vector beam incident on the polarization diffraction element.5. A method for producing the polarization diffraction element as claimed in claim 2 , comprising:forming a coating film comprising the liquid crystalline material having photosensitivity;recording a polarization hologram ...

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Номер записи: 26
16-03-2017 дата публикации

Volume Holograms for Security Documents

Номер: US20170072732A1
Автор: Batistatos Odi, Jolic Karlo, Power Gary Fairless
Принадлежит: INNOVIA SECURITY PTY LTD

A method for producing a security document comprising a volume hologram, including the steps of: applying an optically sensitive material onto a first surface of a substrate in a first region of the first surface; and irradiating the optically sensitive material with patterned radiation configured for recording a volume hologram within the optically sensitive material. 130.-. (canceled)31. A method for producing a security document comprising a volume hologram , including the steps of:a) applying an optically sensitive material onto a first surface of a substrate in a first region of the first surface; andb) irradiating the optically sensitive material with patterned radiation configured for recording a volume hologram within the optically sensitive material.32. A method as claimed in claim 31 , where the optically sensitive material is applied using a printing and/or embossing process.33. A method as claimed in claim 31 , including the further step of applying a protective coating to an outwards facing surface of the optically sensitive material.34. A method as claimed in claim 33 , wherein the protective coating is applied after the irradiation of the optically sensitive material with patterned light.35. A method as claimed in claim 31 , wherein the substrate is formed from a polymeric material claim 31 , preferably biaxially oriented polypropylene.36. A method as claimed in claim 31 , wherein the optically sensitive material is a printable photopolymer.37. A method as claimed in claim 31 , wherein once applied claim 31 , the optically sensitive material includes a substantially flat outward facing surface.38. A method as claimed in claim 31 , wherein once applied claim 31 , the optically sensitive material includes a non-flat outward facing surface claim 31 , such that the optical sensitive material provides a further optical effect in addition to providing a volume hologram.39. A method as claimed in claim 38 , wherein the outward facing surface is shaped as an ...

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Номер записи: 27
15-03-2018 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR CURVED HOLOGRAPHIC OPTICAL ELEMENTS

Номер: US20180074243A1
Автор: Alexander Stefan, Mahon Thomas, Morrison Vance R.
Принадлежит:

Systems, devices, and methods for making, replicating, and using curved holographic optical elements (“HOEs”) are described. A hologram may be optically recorded into a planar layer of holographic film with various measures in place to compensate for changes (e.g., in optical power and/or playback wavelength and/or angular bandwidth) that may result when a curvature is subsequently applied thereto. A hologram may be optically recorded into a curved layer of holographic film with various measures in place to compensate for optical effects of a curved transparent substrate upon which the holographic film is mounted. A curved HOE may be returned to a planar configuration to undergo holographic replication or holographic replication may be performed using a curved master HOE and curved “recipient” film. The curved HOEs described herein are particularly well-suited for use when integrated with a curved eyeglass lens to form the transparent combiner of a virtual retina display. 1. A curved holographic optical element (“HOE”) having a total optical power P , comprising:at least one curved layer of holographic film that includes at least one hologram, wherein:{'sub': H', 'T, 'the at least one hologram has a holographic optical power Pthat is less than the total optical power Pof the curved HOE; and'}{'sub': G', 'T', 'T', 'H', 'G', 'T', 'H', 'G, 'the at least one curved layer of holographic film has a geometric optical power Pthat is less than the total optical power Pof the curved HOE, and wherein the total optical power Pof the curved HOE includes an additive combination of the holographic optical power Pof the at least one hologram and the geometric optical power Pof the at least one curved layer of holographic film given, at least approximately, by P=P+P.'}2. The curved HOE of wherein:{'sub': T', 'T, 'the total optical power Pof the curved HOE is positive and includes a total focal length f;'}{'sub': H', 'H', 'T, 'the holographic optical power Pof the at least one ...

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Номер записи: 28
15-03-2018 дата публикации

Systems, devices, and methods for curved holographic optical elements

Номер: US20180074244A1
Автор: Stefan Alexander, Thomas Mahon, Vance R. Morrison
Принадлежит: Thalmic Labs Inc

Systems, devices, and methods for making, replicating, and using curved holographic optical elements (“HOEs”) are described. A hologram may be optically recorded into a planar layer of holographic film with various measures in place to compensate for changes (e.g., in optical power and/or playback wavelength and/or angular bandwidth) that may result when a curvature is subsequently applied thereto. A hologram may be optically recorded into a curved layer of holographic film with various measures in place to compensate for optical effects of a curved transparent substrate upon which the holographic film is mounted. A curved HOE may be returned to a planar configuration to undergo holographic replication or holographic replication may be performed using a curved master HOE and curved “recipient” film. The curved HOEs described herein are particularly well-suited for use when integrated with a curved eyeglass lens to form the transparent combiner of a virtual retina display.

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Номер записи: 29
15-03-2018 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR CURVED HOLOGRAPHIC OPTICAL ELEMENTS

Номер: US20180074245A1
Автор: Alexander Stefan, Mahon Thomas, Morrison Vance R.
Принадлежит:

Systems, devices, and methods for making, replicating, and using curved holographic optical elements (“HOEs”) are described. A hologram may be optically recorded into a planar layer of holographic film with various measures in place to compensate for changes (e.g., in optical power and/or playback wavelength and/or angular bandwidth) that may result when a curvature is subsequently applied thereto. A hologram may be optically recorded into a curved layer of holographic film with various measures in place to compensate for optical effects of a curved transparent substrate upon which the holographic film is mounted. A curved HOE may be returned to a planar configuration to undergo holographic replication or holographic replication may be performed using a curved master HOE and curved “recipient” film. The curved HOEs described herein are particularly well-suited for use when integrated with a curved eyeglass lens to form the transparent combiner of a virtual retina display. 1. A method of producing a curved holographic optical element (“HOE”) , the method comprising:mounting a holographic film on a first surface, the first surface being transparent and having a first curvature; andoptically recording a hologram in the holographic film while the holographic film is mounted on the first surface.2. The method of claim 1 , further comprising:removing the holographic film from the first surface; and at least one of:mounting the holographic film on a second surface for playback, the second surface having a second curvature substantially equal to the first curvature; orembedding the holographic film within a curved volume for playback, the curved volume having a second curvature substantially equal to the first curvature.3. A method of replicating a curved holographic optical element (“HOE”) that comprises at least one hologram recorded in a holographic film claim 1 , the method comprising:providing a first layer of holographic film;mounting the first layer of holographic ...

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Номер записи: 30
24-03-2022 дата публикации

HOLOGRAM RECORDING COMPOSITION, HOLOGRAM RECORDING MEDIUM, HOLOGRAM OPTICAL ELEMENT, OPTICAL DEVICE AND OPTICAL COMPONENT USING SAME, AND METHOD FOR FORMING HOLOGRAM DIFFRACTION GRATING

Номер: US20220091559A1
Автор: HARA HISAYA, Hobara Daisuke, IGARASHI ERI, KAWASAKI KENSHIRO, Ohe Takahiro
Принадлежит:

To provide a hologram recording composition capable of further improving diffraction characteristics and the transparency of a hologram. 1. A hologram recording composition comprising at least a chromic dye whose decolorized body has a structure containing a primary and/or secondary amino group , an epoxy monomer , and a polymerization initiator.2. The hologram recording composition according to claim 1 , wherein the chromic dye is a dye that is decolorized by pH and/or redox.3. The hologram recording composition according to claim 1 , comprising two or more of the polymerization initiators.4. The hologram recording composition according to claim 1 , wherein the polymerization initiator contains one or more onium salt-based initiators.5. The hologram recording composition according to claim 1 , wherein the polymerization initiator contains one or more onium salt-based initiators and one or more non-onium salt-based initiators.6. The hologram recording composition according to claim 1 , wherein the polymerization initiator contains one or more onium salt-based initiators and one or more aryl borate salt-based initiators.7. The hologram recording composition according to claim 1 , wherein the chromic dye is at least one selected from the group consisting of a thiazine-based compound claim 1 , an azine-based compound claim 1 , an acridine-based compound claim 1 , an oxazine-based compound claim 1 , and a cyanine-based compound.8. A hologram recording medium comprising a photosensitive layer containing at least a chromic dye whose decolorized body has a structure containing a primary and/or secondary amino group claim 1 , an epoxy monomer claim 1 , and a polymerization initiator.9. The hologram recording medium according to claim 8 , wherein the chromic dye is a dye that is decolorized by pH and/or redox.10. The hologram recording medium according to claim 8 , wherein the photosensitive layer contains two or more of the polymerization initiators.11. The hologram ...

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Номер записи: 31
18-03-2021 дата публикации

COMPOSITION FOR HOLOGRAPHIC RECORDING MEDIUM, CURED PRODUCT FOR HOLOGRAPHIC RECORDING MEDIUM, AND HOLOGRAPHIC RECORDING MEDIUM

Номер: US20210080826A1
Автор: SHIMIZU Takanori, TANAKA Asato
Принадлежит: MITSUBISHI CHEMICAL CORPORATION

A holographic recording medium composition contains an isocyanate group-containing compound (component (a-1)), an isocyanate-reactive functional group-containing compound (component (b-1)), a polymerizable monomer (component (c-1)), a photopolymerization initiator (component (d-1)), and a stable nitroxyl radical group-containing compound (component (e-1)). A ratio of the total weight of a propylene glycol unit and a tetramethylene glycol unit that are contained in the component (b-1) to the total weight of the component (a-1) and the component (b-1) is 30% or less. 1. A holographic recording medium composition , comprising:component (a-1): an isocyanate group-containing compound;component (b-1): an isocyanate-reactive functional group-containing compound;component (c-1): a polymerizable monomer;component (d-1): a photopolymerization initiator; andcomponent (e-1): a stable nitroxyl radical group-containing compoundwherein a ratio of a total weight of a propylene glycol unit and a tetramethylene glycol unit that are contained in the component (b-1) to a total weight of the component (a-1) and the component (b-1) is 30% or less.2. A holographic recording medium composition , comprising:component (a-1): an isocyanate group-containing compound;component (b-1): an isocyanate-reactive functional group-containing compound;component (c-1): a polymerizable monomer;component (d-1): a photopolymerization initiator; andcomponent (e-1): a stable nitroxyl radical group-containing compound,wherein a ratio of a weight of a caprolactone unit contained in the component (b-1) to a total weight of the component (a-1) and the component (b-1) is 20% or more.3. The holographic recording medium composition according to claim 1 , wherein the photopolymerization initiator is a photopolymerization initiator containing an oxime ester-based photopolymerization initiator.5. The holographic recording medium composition according to claim 4 , wherein Rrepresents an alkyl group claim 4 , an ...

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Номер записи: 32
23-03-2017 дата публикации

IN LINE MANUFACTURING OF DOCUMENTS WITH SECURITY ELEMENTS

Номер: US20170080742A1
Автор: Power Gary Fairless
Принадлежит: INNOVIA SECURITY PTY LTD

A method and apparatus for in-line manufacture of a security document with a structured security element is provided in which a continuous web of document substrate is fed through a series of processing stations. The processing stations include a station for forming a structured security element in a radiation sensitive coating applied to the document substrate, and at least one station for applying at least one additional layer to the document substrate excluding the security element area. In a security document manufactured with the method or apparatus, the additional layer or layers have a combined thickness which is preferably substantially equal to the height of the structured security element or which differs from the height of the structured security element by a predetermined amount. 1. A method of manufacturing a security document with a structured security element , the method comprising:(a) providing a document substrate having a first surface on one side and a second surface on the opposite side;(b) applying a radiation sensitive coating to a security element area on the first surface of the document substrate;(c) forming a structured security element in the radiation sensitive coating, the security element having a structure extending to a height from the first surface;(d) applying one or more additional layers to the first surface of the substrate, excluding the security element area;(e) wherein the one or more additional layers have a combined thickness which differs from the height of the security element structure by less than 50% of the height of the security element structure and/or by less than 10 μm.2. A method according to claim 1 , wherein the combined thickness of the additional layer or layers is substantially equal to the height of the security element structure or wherein the combined thickness of the additional layer or layers differs from the height of the security element structure by less than 20% claim 1 , more preferably less than 15 ...

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Номер записи: 33
12-03-2020 дата публикации

Photosensitive polymers for volume holography

Номер: US20200081398A1
Автор: Oleg Yaroshchuk
Принадлежит: Facebook Technologies LLC

Photosensitive polymers for recording volume holograms, anisotropic volume holograms, and corresponding volume holographic elements are described herein.

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Номер записи: 34
31-03-2022 дата публикации

HOLOGRAM RECORDING COMPOSITION, HOLOGRAM RECORDING MEDIUM, HOLOGRAM, AND OPTICAL DEVICE AND OPTICAL COMPONENT USING SAME

Номер: US20220101878A1
Автор: HARA HISAYA, IGARASHI ERI, KAWASAKI KENSHIRO, Ohe Takahiro
Принадлежит:

To provide a hologram recording composition capable of further improving diffraction characteristics. 1. A hologram recording composition comprising at least a radically polymerizable monomer , a matrix resin , a photopolymerization initiator , and an anthracene-based compound.2. The hologram recording composition according to claim 1 , comprising a monofunctional monomer and a polyfunctional monomer as the radically polymerizable monomer.3. The hologram recording composition according to claim 1 , wherein the radically polymerizable monomer has a refractive index of 1.6 or more.4. The hologram recording composition according to claim 1 , wherein the radically polymerizable monomer is at least one selected from the group consisting of a carbazole-based monomer claim 1 , a fluorene-based monomer claim 1 , and a dinaphthothiophene-based monomer.6. The hologram recording composition according to claim 1 , further comprising inorganic fine particles.7. The hologram recording composition according to claim 1 , further comprising a cationically polymerizable compound.8. The hologram recording composition according to claim 1 , wherein the cationically polymerizable compound is at least one selected from the group consisting of an epoxy compound and an oxetane compound.9. The hologram recording composition according to claim 1 , further comprising a polymerization inhibitor.10. A hologram recording medium comprising a photocurable resin layer containing at least a radically polymerizable monomer claim 1 , a matrix resin claim 1 , a photopolymerization initiator claim 1 , and an anthracene-based compound.11. The hologram recording medium according to claim 10 , comprising a monofunctional monomer and a polyfunctional monomer as the radically polymerizable monomer.12. The hologram recording medium according to claim 10 , wherein the radically polymerizable monomer has a refractive index of 1.6 or more.13. The hologram recording medium according to claim 10 , wherein the ...

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Номер записи: 35
05-05-2022 дата публикации

Simplified geometry for fabrication of polarization-based elements

Номер: US20220137279A1
Автор: Bryce Murray, Dong-Feng Gu, Milind Mahajan
Принадлежит: Teledyne Scientific and Imaging LLC

Disclosed are various methods for creating optical elements through holographic fabrication. One method includes positioning a reflector in an optical path, disposing a first substrate proximal to the reflector along the optical path, disposing a first photosensitive film on the side of the first substrate facing the reflector, transmitting a light beam at a first polarization from a light source along the optical path, reflecting the light beam off the reflector, wherein the reflected light beam has a second polarization, receiving the reflected light beam through the first film and the first substrate, and applying a liquid crystal layer to the first photosensitive film to reproduce the alignment pattern of the first film on the liquid crystal layer.

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Номер записи: 36
01-04-2021 дата публикации

PROTECTIVE LAYER FOR PHOTOPOLYMER

Номер: US20210095064A1
Автор: HOVESTADT Wieland, KLOBUTOWSKI Therese, Kostromine Serguei, Roelle Thomas, VETTERLE Karl
Принадлежит:

The invention relates to a protective layer comprising a photopolymer layer B and and an at least partly cured protective layer C, to a process for producing the layer construction according to the invention, to a kit of parts, to the use of an at least partly cured protective layer C for protection of a photopolymer layer B and to optical displays and security documents comprising the layer construction according to the invention. 117.-. (canceled)18. A layer construction comprising an areal photopolymer layer B and an at least partly cured protective layer C obtained by reaction of an aqueous composition comprising(I) at least one polyvinyl alcohol,(II) at least one crosslinker for polyvinyl alcohols,(III) optionally at least one adhesion promoter, wherein the adhesion promoter is preferably at least one hydrolyzate of an aminoalkyl trialkoxysilane and(IV) optionally at least one surfactant,wherein the photopolymer layer B is at least partly joined to the layer C.19. A kit of parts containing at least one areal photopolymer layer and an aqueous composition for generating an at least partly cured protective layer C , wherein the aqueous composition comprises(I) at least one polyvinyl alcohol,(II) at least one crosslinker for polyvinyl alcohols,(III) optionally at least one adhesion promoter, wherein the adhesion promoter is preferably at least one hydrolyzate of an aminoalkyl trialkoxysilane and(IV) optionally at least one surfactant and wherein the photopolymer layer is optionally disposed atop a substrate layer A.20. The kit of parts according to claim 19 , further containing an adhesives layer D and a substrate layer E.21. The layer construction according to claim 18 , wherein the photopolymer layer B is an unirradiated photopolymer layer comprising(I) matrix polymers,(II) writing monomers,(III) photoinitiators,(IV) optionally at least one non-photopolymerizable component and(V) optionally catalysts, free-radical stabilizers, solvents, additives and other ...

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Номер записи: 37
05-04-2018 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR CURVED HOLOGRAPHIC OPTICAL ELEMENTS

Номер: US20180095213A1
Автор: Alexander Stefan, Mahon Thomas, Morrison Vance R.
Принадлежит:

Systems, devices, and methods for making, replicating, and using curved holographic optical elements (“HOEs”) are described. A hologram may be optically recorded into a planar layer of holographic film with various measures in place to compensate for changes (e.g., in optical power and/or playback wavelength and/or angular bandwidth) that may result when a curvature is subsequently applied thereto. A hologram may be optically recorded into a curved layer of holographic film with various measures in place to compensate for optical effects of a curved transparent substrate upon which the holographic film is mounted. A curved HOE may be returned to a planar configuration to undergo holographic replication or holographic replication may be performed using a curved master HOE and curved “recipient” film. The curved HOEs described herein are particularly well-suited for use when integrated with a curved eyeglass lens to form the transparent combiner of a virtual retina display. 1. A method of producing a holographic optical element (“HOE”) that comprises at least one hologram recorded in a holographic film , the method comprising:providing a first layer of holographic film in a planar geometry;stretching the first layer of holographic film;optically recording a hologram in the first layer of holographic film while the first layer of holographic film is stretched; andreturning the first layer of holographic film to an unstretched state.2. The method of wherein stretching the first layer of holographic film includes mounting the first layer of holographic film onto a curved surface.3. The method of claim 1 , further comprising at least one of:mounting the first layer of holographic film on a curved surface for playback; orembedding the first layer of holographic film within a curved volume for playback.4. The method of wherein mounting the first layer of holographic film on a curved surface for playback includes stretching the first layer of holographic film in the ...

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Номер записи: 38
19-04-2018 дата публикации

SYSTEMS, ARTICLES, AND METHODS FOR INTEGRATING HOLOGRAPHIC OPTICAL ELEMENTS WITH EYEGLASS LENSES

Номер: US20180107003A1
Автор: Bailey Matthew, Holland Lloyd Frederick
Принадлежит:

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described. 1. A method of manufacturing a lens for use in a wearable heads-up display , the method comprising:providing a first portion of the lens;providing a photopolymer film;adhering a surface of the first portion of the lens and a first surface of the photopolymer film together by a first portion of optical adhesive;providing a second portion of the lens;adhering a surface of the second portion of the lens and a second surface of the photopolymer film together by a second portion of optical adhesive, the second surface of the photopolymer film opposite the first surface of the photopolymer film.2. The method of wherein the first portion of the lens comprises a front half portion of the lens and the surface of the first portion of the lens is a concave surface claim 1 , and wherein adhering a surface of the first portion of the lens and a first surface of the photopolymer film together by a first portion of optical adhesive includes adhering the concave surface of the first portion of the lens and the first surface of the photopolymer film together by the first portion of optical adhesive.3. The method of wherein the second ...

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Номер записи: 39
19-04-2018 дата публикации

SYSTEMS, ARTICLES, AND METHODS FOR INTEGRATING HOLOGRAPHIC OPTICAL ELEMENTS WITH EYEGLASS LENSES

Номер: US20180107004A1
Автор: Bailey Matthew, Holland Lloyd Frederick
Принадлежит:

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described. 1. A method of manufacturing a lens for use in a wearable heads-up display , the method comprising:providing a photopolymer film;molding a lens-forming fluid to produce a first portion of the lens having the photopolymer film embedded therein;providing a second portion of the lens; andadhering a surface of the second portion of the lens and a first surface of the first portion of the lens together by a first portion of optical adhesive.2. The method of wherein the first portion of the lens comprises a front half portion of the lens and the first surface of the first portion of the lens is a concave surface claim 1 , and wherein adhering a surface of the second portion of the lens and a first surface of the first portion of the lens together by a first portion of optical adhesive includes adhering the concave surface of the first portion of the lens and the first surface of the first portion of the lens together by the first portion of optical adhesive.3. The method of wherein the second portion of the lens comprises a rear half portion of the lens and the surface of the second portion of the lens is a convex surface claim ...

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Номер записи: 40
19-04-2018 дата публикации

Multifunctional optical element and method using multiple light scattering

Номер: US20180107157A1
Автор: Jongchan Park, YongKeun PARK
Принадлежит: Korea Advanced Institute of Science and Technology KAIST

Disclosed herein are a multifunctional optical element and method using multiple light scattering. An optical control method using multiple light scattering may include the steps of splitting coherent light into a signal beam and a reference beam, controlling the wavefront of the signal beam, forming an interference pattern by making the signal beam having the controlled wavefront and the reference beam incident on photorefractive materials, recording the interference pattern on the photorefractive materials, reconstructing the signal beam having the controlled wavefront by the interference pattern by radiating the reference beam to the photorefractive materials on which the interference pattern has been recorded again, and controlling the properties of light passing through complex media based on multiple light scattering generated by the complex media as the reconstructed signal beam is incident on the complex media.

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Номер записи: 41
20-04-2017 дата публикации

HOLOGRAPHIC STORAGE LAYER, HOLOGRAPHIC DISK USING THE SAME, AND METHOD FOR MANUFACTURING THE SAME

Номер: US20170110147A1
Автор: Sun Ching-Cherng, YU Yeh-Wei
Принадлежит:

A holographic storage layer includes a reflective structure and photosensitive units. The reflective structure is a grid-shaped structure and includes cavities. The photosensitive units are disposed in the cavities, in which each of the photosensitive units is surrounded by the reflective structure. First openings and second openings are defined by the reflective structure, and the photosensitive units are exposed by the first openings and the second openings respectively. 1. A method for manufacturing a holographic storage layer , comprising:forming a plurality of reflective layers on a plurality of strip-shaped photosensitive substances respectively;arranging the photosensitive substances in a parallel arrangement for making the photosensitive substances into a bundle-shape configuration, wherein a space between the reflective layers is filled with at least one adhesive unit to realize the bundle shape of the photosensitive substances; andcutting the photosensitive substances, wherein a cutting direction and a lengthwise direction of the photosensitive substances provided in the bundle-shape configuration are orthogonal.2. The method of claim 1 , wherein at least one of the photosensitive substances is a bar made of one of an optical storage material and a photosensitive material.3. The method of claim 1 , wherein at least one of the reflective layers is formed by coating reflective material.4. The method of claim 1 , wherein at least one of the reflective layers is formed through vapor deposition of reflective material.5. The method of claim 1 , wherein the photosensitive substances are arranged into an array.6. The method of claim 5 , wherein a combination of the photosensitive substances becomes at least one sheet structure after the cutting.7. The method of claim 6 , further comprising:burnishing the sheet structure. The present application is a divisional of U.S. application Ser. No. 14/660,921, filed Mar. 17, 2015, which claims priority from Taiwanese ...

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Номер записи: 42
26-04-2018 дата публикации

SYSTEMS, ARTICLES, AND METHODS FOR INTEGRATING HOLOGRAPHIC OPTICAL ELEMENTS WITH EYEGLASS LENSES

Номер: US20180113314A1
Автор: Bailey Matthew, Holland Lloyd Frederick
Принадлежит:

Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described. 1. A method of manufacturing a lens for use in a wearable heads-up display , the method comprising:providing a first portion of the lens;providing a photopolymer film;adhering a surface of the first portion of the lens and a first surface of the photopolymer film together by a first portion of optical adhesive; andmolding a lens forming fluid to complete the lens, wherein the completed lens includes the first portion of the lens, the photopolymer film, and the molded lens-forming fluid.2. The method of wherein molding a lens forming fluid to complete the lens includes:providing a lens mold having a cavity;casting a lens-forming fluid into the cavity; andcuring the lens-forming fluid within the cavity.3. The method of wherein molding a lens forming fluid to complete the lens includes molding a lens forming fluid to complete the lens wherein the first portion of the lens is contained entirely within an inner volume of the completed lens.4. The method of wherein the first portion of the lens comprises a front half portion of the lens and the surface of the first portion of the lens is a concave surface claim 1 , and wherein ...

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Номер записи: 43
27-04-2017 дата публикации

Holographic display

Номер: US20170115487A1
Автор: Adrian Travis
Принадлежит: Microsoft Technology Licensing LLC

A display device includes an optical sensor configured to image a user eye, an image source configured to provide image light, a holographic film including a plurality of holograms, and a controller. Each hologram is recorded with a same reference beam but recorded differently so as to differently diffract image light received from the light source. The controller is configured to determine, via the optical sensor, a position of the user eye, and adjust, based on the determined position of the user eye, a state of the holographic film such that a particular hologram of the plurality of holograms diffracts image light to the position of the user eye.

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Номер записи: 44
03-05-2018 дата публикации

HOLOGRAM RECORDING COMPOSITION, HOLOGRAM RECORDING MEDIUM, AND METHOD OF PRODUCING HOLOGRAM RECORDING MEDIUM

Номер: US20180120694A1
Автор: HARA HISAYA, Hobara Daisuke, IGARASHI ERI, TAKI Yuko
Принадлежит: SONY CORPORATION

A hologram recording composition includes at least: a photopolymerizable compound containing at least a first photopolymerizable monomer; binder resin that is inactive to photopolymerization; and a photopolymerization initiator. A change in polarity of the first photopolymerizable monomer by photopolymerization reduces compatibility with the binder resin of the photopolymerizable compound than that before polymerization, the compatibility of the photopolymerizable compound before the polymerization being high. 1. A hologram recording composition , comprising at least:a photopolymerizable compound containing at least a first photopolymerizable monomer;binder resin that is inactive to photopolymerization; anda photopolymerization initiator, whereina change in polarity of the first photopolymerizable monomer by photopolymerization reduces compatibility with the binder resin of the photopolymerizable compound than that before polymerization, the compatibility of the photopolymerizable compound before the polymerization being high.2. The hologram recording composition according to claim 1 , whereina dipole moment of the first photopolymerizable monomer after the polymerization is reduced due to the photopolymerization by not less than 1.7 [debye] than the dipole moment of the first photopolymerizable monomer before the polymerization.4. The hologram recording composition according to claim 3 , whereinthe photopolymerizable monomer containing the group represented by the general formula (1) is phthalic anhydride, a derivative of phthalic anhydride, 2,3-naphthalenedicarboxylic anhydride, or a derivative of 2,3-naphthalenedicarboxylic anhydride.5. The hologram recording composition according to claim 1 , whereinthe photopolymerizable compound contains a second photopolymerizable monomer that copolymerizes with the first photopolymerizable monomer.6. The hologram recording composition according to claim 5 , whereinthe second photopolymerizable monomer is a photopolymerizable ...

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Номер записи: 45
03-05-2018 дата публикации

TOOL SURFACE NANO-STRUCTURE PATTERNING PROCESS

Номер: US20180120696A1
Автор: Auzelyte Vaida, SAVU Veronica
Принадлежит:

Method of patterning a surface of an object or a tool with nano and/or micro structure elements having dimensions in a range of 1 nanometer to 1 millimeter, comprising the steps of producing a flexible mask with said nano or micro structure pattern formed on a surface of said flexible mask, chemically activating said surface of the flexible mask and/or said surface to be patterned of the tool, placing said patterned surface of the flexible mask in contact with said surface to be patterned of the object or tool, promoting a covalent bonding reaction between said patterned surface of the flexible mask in contact with said surface to be patterned, removing the flexible mask from the tool whereby a layer of said flexible mask remains bonded to said surface to be patterned of the tool, etching said surface to be patterned of the tool whereby the bonded layer of flexible mask material resists etching. An anti-activation mask defining a periphery of the surface area to be patterned, or peripheries of the surface area to be patterned if there are a plurality of separate portions of surface area to be patterned, is deposited on the flexible mask prior to placing the patterned surface of the flexible mask on the surface to be patterned. The anti-activation mask prevents bonding of the flexible mask to the surface of the object or tool in areas where the anti-activation mask is present. 115-. (canceled)16. Method of patterning a surface of an object or a tool with nano and/or micro structure elements , comprising the steps of:producing a flexible mask with said nano or micro structure pattern formed on a surface of said flexible mask;chemically activating said surface of the flexible mask and/or a surface to be patterned of the object or tool, placing said patterned surface of the flexible mask in contact with said surface to be patterned of the object or tool, said chemical activation configured to modify chemical properties at the surface of the flexible mask or surface to ...

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Номер записи: 46
04-05-2017 дата публикации

Holographic Recording Composition

Номер: US20170123374A1
Автор: CODY Dervil, Martin Suzanne, Mihaylova Emilia, Naydenova Izabela, Toal Vincent
Принадлежит: Dublin Institute of Technology

A pressure sensitive holographic recording composition is described wherein the composition comprises diacetone acrylamide, glycerol and citric acid. The composition is capable of recording high diffraction efficiency reflection holograms. 124-. (canceled)25. A holographic recording composition comprising diacetone acrylamide , citric acid , and glycerol.26. The holographic recording composition as claimed in claim 25 , wherein the holographic recording composition is a pressure sensitive holographic recording composition claim 25 , wherein a colour change occurs in the image reconstructed from a hologram recorded in the composition in response to a change in pressure applied to the composition.27. The holographic recording composition as claimed in claim 26 , wherein sensitivity to change in pressure is manifested by a change in the wavelength of a reconstructed light from a reflection hologram recorded in such composition.28. The holographic recording composition as claimed in claim 25 , which is configured to record pressure sensitive holograms having a diffraction efficiency in the range 25% to 40% when recorded at a spatial frequency in the range of 2500 l/mm to 3500 l/mm.29. The holographic recording composition as claimed in claim 25 , further comprising a free radical generator claim 25 , a photoinitiator claim 25 , and a binder.30. The holographic recording composition as claimed in claim 29 , wherein the free radical generator is selected from the group consisting of triethanolamine (TEA) claim 29 , Diethanolamine (DEA) claim 29 , Ethanolamine (EA) claim 29 , Trethlyamine (TETN) claim 29 , Diethylamine (DETN) claim 29 , and Ethylenediaminetetraacetic acid (EDTA).31. The holographic recording composition according to claim 30 , wherein the free radical generator comprises triethanolamine.32. The holographic recording composition according to claim 31 , wherein the triethanolamine is present in an amount in the range of 20% w/w to 45% w/w.33. The holographic ...

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Номер записи: 47
27-05-2021 дата публикации

AROMATIC SUBSTITUTED METHANE-CORE MONOMERS AND POLYMERS THEREOF FOR VOLUME BRAGG GRATINGS

Номер: US20210155584A1
Автор: Colburn Matthew E., LANE Austin, PURVIS Lafe
Принадлежит:

The disclosure provides recording materials including aromatic substituted methane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for monomers and polymers for use in Bragg gratings applications leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer. 2. The compound of claim 1 , wherein any one of R claim 1 , R claim 1 , R claim 1 , and Rindependently comprises one or more linking groups selected from —Calkyl- claim 1 , —O—Calkyl- claim 1 , —Calkenyl- claim 1 , —O—Calkenyl- claim 1 , —Ccycloalkenyl- claim 1 , —O—Ccycloalkenyl- claim 1 , —Calkynyl- claim 1 , —O—Calkynyl- claim 1 , —Caryl- claim 1 , —O—C— claim 1 , -aryl- claim 1 , —O— claim 1 , —S— claim 1 , —S(O)— claim 1 , —C(O)— claim 1 , —C(O)O— claim 1 , —OC(O)— claim 1 , —C(O)S— claim 1 , —SC(O)— claim 1 , —OC(O)O— claim 1 , —N(R)— claim 1 , —C(O)N(R)— claim 1 , —N(R)C(O)— claim 1 , —OC(O)N(R)— claim 1 , —N(R)C(O)O— claim 1 , —SC(O)N(R)— claim 1 , —N(R)C(O)S— claim 1 , —N(R)C(O)N(R)— claim 1 , —N(R)C(NR)N(R)— claim 1 , —N(R)S(O)— claim 1 , —S(O)N(R)— claim 1 , —S(O)O— claim 1 , —OS(O)— claim 1 , —OS(O)O— claim 1 , —O(O)P(OR)O— claim 1 , (O)P(O—) claim 1 , —O(S)P(OR)O— claim 1 , and (S)P(O—) claim 1 ,{'sup': 'b', 'wherein w is 1 or 2, and Ris independently hydrogen, optionally substituted alkyl, or optionally substituted aryl.'}3. The compound of claim 1 , wherein any one of R claim 1 , R claim 1 , R claim 1 , and Rindependently comprises one or more terminal groups selected from hydrogen claim 1 , optionally substituted alkyl claim 1 , optionally substituted ...

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Номер записи: 48
27-05-2021 дата публикации

ANTHRAQUINONE DERIVATIZED MONOMERS AND POLYMERS FOR VOLUME BRAGG GRATINGS

Номер: US20210155585A1
Автор: Colburn Matthew E., LANE Austin, PURVIS Lafe
Принадлежит:

The disclosure provides recording materials including anthraquinone derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for anthraquinone derivatized monomers and polymers for use in Bragg gratings applications, leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed anthraquinone derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer. 2. The compound of claim 1 , wherein the substituent comprises one or more linking groups selected from —Calkyl- claim 1 , —O—Calkyl- claim 1 , —Calkenyl- claim 1 , —O—Calkenyl- claim 1 , —Ccycloalkenyl- claim 1 , —O—Ccycloalkenyl- claim 1 , —Calkynyl- claim 1 , —O—Calkynyl- claim 1 , —Caryl- claim 1 , —O—C— claim 1 , -aryl- claim 1 , —O— claim 1 , —S— claim 1 , —S(O)— claim 1 , —C(O)— claim 1 , —C(O)O— claim 1 , —OC(O)— claim 1 , —C(O)S— claim 1 , —SC(O)— claim 1 , —OC(O)O— claim 1 , —N(R)— claim 1 , —C(O)N(R)— claim 1 , —N(R)C(O)— claim 1 , —OC(O)N(R)— claim 1 , —N(R)C(O)O— claim 1 , —SC(O)N(R)— claim 1 , —N(R)C(O)S— claim 1 , —N(R)C(O)N(R)— claim 1 , —N(R)C(NR)N(R)— claim 1 , —N(R)S(O)— claim 1 , —S(O)N(R)— claim 1 , —S(O)O— claim 1 , —OS(O)— claim 1 , —OS(O)O— claim 1 , —O(O)P(OR)O— claim 1 , (O)P(O—) claim 1 , —O(S)P(OR)O— claim 1 , and (S)P(O—) claim 1 ,{'sup': 'b', 'wherein w is 1 or 2, and Ris independently hydrogen, optionally substituted alkyl, or optionally substituted aryl.'}3. The compound of claim 1 , wherein the substituent comprises one or more terminal groups selected from hydrogen claim 1 , optionally substituted alkyl claim 1 , optionally substituted heteroalkyl claim 1 , optionally substituted alkenyl claim 1 , optionally substituted ...

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Номер записи: 49
27-05-2021 дата публикации

AROMATIC SUBSTITUTED ALKANE-CORE MONOMERS AND POLYMERS THEREOF FOR VOLUME BRAGG GRATINGS

Номер: US20210155599A1
Автор: Colburn Matthew E., LANE Austin, PURVIS Lafe
Принадлежит:

The disclosure provides recording materials including aromatic substituted alkane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed, including Formula I. When used in Bragg gratings applications, the monomers and polymers disclosed lead to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer. 2. The compound of claim 1 , wherein the substituent comprises one or more linking groups selected from —Calkyl- claim 1 , —O—Calkyl- claim 1 , —Calkenyl- claim 1 , —O—Calkenyl- claim 1 , —Ccycloalkenyl- claim 1 , —O—Ccycloalkenyl- claim 1 , —Calkynyl- claim 1 , —O—Calkynyl- claim 1 , —Caryl- claim 1 , —O—C— claim 1 , -aryl- claim 1 , —O— claim 1 , —S— claim 1 , —S(O)— claim 1 , —C(O)— claim 1 , —C(O)O— claim 1 , —OC(O)— claim 1 , —C(O)S— claim 1 , —SC(O)— claim 1 , —OC(O)O— claim 1 , —N(R)— claim 1 , —C(O)N(R)— claim 1 , —N(R)C(O)— claim 1 , —OC(O)N(R)— claim 1 , —N(R)C(O)O— claim 1 , —SC(O)N(R)— claim 1 , —N(R)C(O)S— claim 1 , —N(R)C(O)N(R)— claim 1 , —N(R)C(NR)N(R)— claim 1 , —N(R)S(O)— claim 1 , —S(O)N(R) claim 1 , —S(O)O— claim 1 , —OS(O)— claim 1 , —OS(O)O— claim 1 , —O(O)P(OR)O— claim 1 , (O)P(O—) claim 1 , —O(S)P(OR)O— claim 1 , and (S)P(O—) claim 1 ,{'sup': 'b', 'wherein w is 1 or 2, and Ris independently hydrogen, optionally substituted alkyl, or optionally substituted aryl.'}3. The compound of claim 1 , wherein the substituent comprises one or more linking groups selected from —(CH)— claim 1 , 1 claim 1 ,2 disubstituted phenyl claim 1 , 1 claim 1 ,3 disubstituted phenyl claim 1 , 1 claim 1 ,4 disubstituted phenyl claim 1 , disubstituted ...

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Номер записи: 50
27-05-2021 дата публикации

THIOPHOSPHATE AND PHOSPHINE SULFIDE DERIVATIZED MONOMERS AND POLYMERS FOR VOLUME BRAGG GRATINGS

Номер: US20210155639A1
Автор: Colburn Matthew E., LANE Austin, PURVIS Lafe
Принадлежит:

The disclosure provides recording materials including thiophosphate derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed for thiophosphate derivatized monomers and polymers for use in Bragg gratings applications, leading to materials with higher refractive index, low birefringence, and high transparency. The disclosed thiophosphate derivatized monomers and polymers thereof can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer. 2. The compound of claim 1 , wherein the substituent comprises one or more linking groups selected from —(CH)— claim 1 , substituted —Calkyl- claim 1 , 1 claim 1 ,2 disubstituted phenyl claim 1 , 1 claim 1 ,3 disubstituted phenyl claim 1 , 1 claim 1 ,4 disubstituted phenyl claim 1 , disubstituted glycidyl claim 1 , trisubstituted glycidyl claim 1 , —CH═CH— claim 1 , —C≡C claim 1 , —O— claim 1 , —S— claim 1 , —S(O)— claim 1 , —C(O)— claim 1 , —C(O)O— claim 1 , —OC(O)— claim 1 , —OC(O)O— claim 1 , —NH— claim 1 , —C(O)NH— claim 1 , —NHC(O)— claim 1 , —OC(O)NH— claim 1 , —NHC(O)O— claim 1 , —SC(O)NH— claim 1 , —NHC(O)S— claim 1 , —NHC(O)NH— claim 1 , —NHC(NH)NH— claim 1 , —NHS(O)— claim 1 , —S(O)NH— claim 1 , —S(O)O— claim 1 , —OS(O)— claim 1 , —OS(O)O— claim 1 , (O)P(O—) claim 1 , and (S)P(O—) claim 1 , wherein p is an integer from 1 to 12.3. The compound of claim 1 , wherein the substituent comprises one or more terminal groups selected from hydrogen claim 1 , optionally substituted alkyl claim 1 , optionally substituted heteroalkyl claim 1 , optionally substituted alkenyl claim 1 , optionally substituted alkynyl claim 1 , optionally substituted cycloalkyl claim 1 , optionally substituted heterocycloalkyl claim 1 , optionally substituted aryl claim 1 , ...

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Номер записи: 51
16-04-2020 дата публикации

SPECTACLE LENS AND METHOD FOR PRODUCING A SPECTACLE LENS

Номер: US20200117023A1
Автор: Lindig Karsten, Pütz Jörg, Rifai Katharina
Принадлежит:

A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described. 1. An optical lens , comprising:a transparent substrate, andat least one HOE-capable polymer layer on the transparent substrate,wherein the at least one HOE-capable polymer layer forms a holographic optical element.2. The optical lens of claim 1 ,wherein the holographic optical element is formed by a spatially resolved exposure of the HOE-capable polymer layer,wherein the spatially resolved exposure is based on control data that comprises an intensity and a phase of the spatially resolved exposure, andwherein the control data is determined depending on a geometry of the transparent substrate.3. The optical lens of claim 1 , further comprising:a transparent hard layer on the transparent substrate,wherein the at least one HOE-capable polymer layer is between the transparent substrate and the transparent hard layer.4. The optical lens of claim 3 ,wherein the transparent hard layer comprises a polysiloxane-based organic/inorganic hybrid material.5. The optical lens of claim 3 ,wherein a layer thickness of the transparent hard layer is in a range of 1 μm to 3 μm.6. The optical lens of claim 1 ,wherein a layer thickness of each of the at least one HOE-capable polymer layer is in a range of 1 μm-100 μm.7. The optical lens of claim 1 ,wherein a first HOE-capable polymer layer of the at least one HOE-capable polymer layer is on a first side of the transparent substrate, andwherein a second HOE-capable polymer layer of the at least one HOE-capable polymer layer is on a second side of the transparent substrate.8. The optical lens of claim 1 ,wherein the HOE-capable polymer layer comprises an HOE polymer in a polymer matrix, andwherein the optical lens further comprises a primer layer that comprises a further ...

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Номер записи: 52
02-05-2019 дата публикации

FILTER FOR LASER PROTECTION

Номер: US20190129077A1
Автор: Black Daniel Benjamin, Laycock Leslie Charles
Принадлежит:

A method of forming a filter, comprising the steps of:—selecting at least a first wavelength corresponding to a predetermined laser threat and having a first colour in the visible spectrum;—providing a generally transparent substrate and forming a first notch filter region therein configured to substantially block incident radiation thereon of wavelengths within a first predetermined wavelength band including said first wavelength;—selecting a second wavelength having a second colour in the visible spectrum and forming a colour balancing notch filter region in said substrate configured to block incident radiation thereon of wavelengths within a wavelength band including said second wavelength, thereby to balance or neutralise any colour distortion of said substrate caused by said first notch filter region. 1. A method of forming a filter , comprising the steps of:selecting at least a first wavelength corresponding to a predetermined laser threat and having a first colour in the visible spectrum;providing a generally transparent substrate and forming a first notch filter region therein configured to substantially block incident radiation thereon of wavelengths within a first predetermined wavelength band including said first wavelength;selecting a second wavelength having a second colour in the visible spectrum and forming a colour balancing notch filter region in said substrate configured to block incident radiation thereon of wavelengths within a wavelength band including said second wavelength, thereby to balance or neutralise any colour distortion of said substrate caused by said first notch filter region.2. The method according to claim 1 , wherein said film is formed of a photosensitive polymer material.3. The method according to claim 2 , wherein said film has a visible light transmission of at least 85%.4. The method according to claim 2 , wherein said filter regions are formed by holographic exposure of said film to radiation of wavelengths within said ...

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Номер записи: 53
08-09-2022 дата публикации

Evacuated Periodic Structures and Methods of Manufacturing

Номер: US20220283376A1
Автор: Abraham Shibu, Callens Michiel Koen, GRANT Alastair John, Hill Baeddan George, Ho Tsung-Jui, Lee Hyesog, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays. 1. A method for fabricating a periodic structure , the method comprising:providing a holographic mixture on a base substrate;sandwiching the holographic mixture between the base substrate and a cover substrate, wherein the holographic mixture forms a holographic mixture layer on the base substrate;applying holographic recording beams to the holographic mixture layer to form a holographic polymer dispersed periodic structure comprising alternating polymer rich regions and non-reactive material rich regions; andremoving the cover substrate from the holographic polymer dispersed periodic structure, wherein the cover substrate has different properties than the base substrate to allow for the cover substrate to adhere to the unexposed holographic mixture layer while capable of being removed from the formed holographic polymer dispersed periodic structure after exposure.2. The method of claim 1 , further comprising removing at least a portion of the non-reactive material in the non-reactive material rich regions to form a polymer periodic structure.3. The method of claim 2 , further comprising refilling the non-reactive material rich regions with a backfill material.4. The method of claim 3 , wherein the backfill material has a different refractive index than the refractive index of the remaining ...

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Номер записи: 54
08-09-2022 дата публикации

Evacuated Periotic Structures and Methods of Manufacturing

Номер: US20220283378A1
Автор: Abraham Shibu, Callens Michiel Koen, GRANT Alastair John, Hill Baeddan George, Ho Tsung-Jui, Lee Hyesog, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated periodic structures (EPSs). EPSs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) periodic structure. Removing the liquid crystal from the cured periodic structure provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays. 1. A waveguide device comprising: a polymer regions;', 'air gaps between adjacent portions of the polymer regions;', 'an optical layer disposed between the polymer regions and the waveguide; and', 'a coating disposed on the tops of the polymer regions and the tops of the optical layer., 'a waveguide supporting a polymer grating structure for diffracting light propagating in total internal reflection in said waveguide, wherein the polymer grating structure comprises2. The waveguide device of claim 1 , wherein the coating comprises an atomic layer deposition (ALD) deposited metallic layer or dielectric layer to enhance evanescent coupling between the waveguide and the polymer grating structure.3. The waveguide device of claim 1 , wherein the coating comprises an atomic layer deposition (ALD) deposited metallic layer or dielectric layer to enhance the effective refractive index of the polymer grating structure.4. The waveguide device of claim 1 , wherein the coating comprises an atomic layer deposition (ALD) deposited metallic layer or dielectric layer to enhance adhesion and/or perform as a bias layer.5. The waveguide device of claim 1 , wherein the coating comprises an atomic layer deposition (ALD) conformally deposited metallic layer or dielectric layer disposed over the entirety of the ...

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Номер записи: 55
24-05-2018 дата публикации

Holographic Polymer Dispersed Liquid Crystal Diffraction Grating

Номер: US20180143479A1
Автор: Campbell Scott Patrick
Принадлежит:

A camera system includes an image sensor assembly and a tunable optical element. The tunable optical element is a holographic polymer dispersed liquid crystal diffraction grating of alternating PDLC layers. The diffraction grating is tunable by applying an electric field to the optical element via a control element. The control element applies a voltage differential to the optical element inducing an electric field which changes the polarization of the PDLC within the optical element. The refractive index of the holographic grating is dependent on the polarization of the liquid crystals within the optical element. Applying the electric field to the tunable element changes the optical properties of the grating. 1. A camera system includingan image sensor assembly configured to capture images, the image sensor assembly centered about an optical axis; a first plurality of layers of a first material, wherein a first polarization of the first material is controllable by an applied electric field, each layer of the first plurality of layers having a first refractive index controllable by the first polarization of the first material in the first plurality of layers,', 'a second plurality of layers of a second material, wherein each layer of the second plurality of layers has a second refractive index controllable by a second polarization of the second material in the second plurality of layers,', 'wherein the first and second plurality of layers are alternately layered in a layer stack of the tunable optical element, and', 'wherein each of the first and the second plurality of layers have at least one respective arc-shaped cross sections having respective peaks aligned with the optical axis; and', 'a first control element coupled to the tunable optical element for applying a voltage differential to the first plurality of layers, the voltage differential creating the electric field controlling the first refractive index of the first plurality of layers of the tunable ...

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Номер записи: 56
15-09-2022 дата публикации

COMPOUND, POLYMER, AND ORGANIC MATERIAL, AND OPTICAL APPARATUS, OPTICAL PART, AND IMAGE DISPLAY APPARATUS USING THE ORGANIC MATERIAL

Номер: US20220289678A1
Автор: HARA HISAYA, KAWASAKI KENSHIRO, Ohe Takahiro
Принадлежит:

To provide a compound that is capable of improving the function of an organic material. 2. The compound according to claim 1 , wherein Xin the general formula (1) represents a nitrogen atom.4. An organic material containing the compound according to .5. The organic material according to claim 4 , wherein the organic material is an organic thin film claim 4 , an organic lens claim 4 , or a hologram.6. The organic material according to claim 4 , whereinthe organic material is a composition for an organic thin film, a composition for an organic lens, or a photosensitive composition for recording a hologram.7. A polymer obtained by polymerizing the compound according to .8. An organic material containing the polymer according to .9. The organic material according to claim 8 , whereinthe organic material is an organic thin film, an organic lens, or a hologram.10. The organic material according to claim 8 , whereinthe organic material is a composition for an organic thin film, a composition for an organic lens, or a photosensitive composition for recording a hologram.11. An optical apparatus containing the organic material according to .12. An optical part containing the organic material according to .13. An image display apparatus containing the organic material according to .14. An optical apparatus containing the organic material according to .15. An optical part containing the organic material according to .16. An image display apparatus containing the organic material according to .17. A composition claim 8 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the compound according to ; and'}a radical polymerizable monomer.18. The composition according to claim 17 , whereinthe radical polymerizable monomer is one or more selected from the group consisting of a carbazole monomer, a dinaphthothiophene monomer, a fluorene monomer, and a dibenzofuran monomer. The present technology relates to a compound, a polymer, and an organic material, and to an optical ...

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Номер записи: 57
17-06-2021 дата публикации

DIRECTLY PRINTABLE IMAGE RECORDING MATERIAL AND PREPARATION METHOD THEREOF

Номер: US20210183407A1
Автор: Chen Guannan, GE Hongwei, LIAO Yonggui, PENG Haiyan, XIE Xiaolin, YANG Zhifang, ZHANG Xiaomei, ZHOU Xingping
Принадлежит:

The present invention belongs to the field of functional materials, and particularly relates to a directly printable image recording material, a preparation method and application thereof. The image recording material comprises 25 to 78.8 parts by mass of a photopolymerizable monomer, 0.2 to 5 parts by mass of a photoinitiator, 20 to 70 parts by mass of an inert component, and 0.05 to 2 parts by mass of a thermal polymerization inhibitor, and has an initial viscosity of 200 to 800 mPa·s. The photopolymerizable monomer includes a thiol monomer and an olefin monomer, at least one of which is a silicon-based monomer with polyhedral oligomeric silsesquioxane as a silicon core. By introducing a POSS-based thiol or olefin monomer into the photopolymerizable monomer in combination with other material components, the recording material is allowed to have an initial viscosity of 200 to 800 mPa·s, and meanwhile, the low thermal conductivity characteristic of the POSS-based photopolymerizable monomer is utilized, so that image storage quality is ensured, continuous industrial production of the image recording material is achieved, the process cost is reduced and the production efficiency is improved. 1. A directly printable image recording material , characterized by comprising 25 to 78.8 parts by mass of a photopolymerizable monomer , 0.2 to 5 parts by mass of a photoinitiator , 20 to 70 parts by mass of an inert component , and 0.05 to 2 parts by mass of a thermal polymerization inhibitor , the image recording material having an initial viscosity of 200 to 800 mPa·s , wherein:the photopolymerizable monomer includes a thiol monomer and an olefin monomer, a molar ratio of the thiol functional group to the olefin functional group in the photopolymerizable monomer is 1:10 to 10:1, at least one of the thiol monomer and the olefin monomer is a silicon-based monomer with polyhedral oligomeric silsesquioxane as a silicon core, and the silicon-based monomer in the photopolymerizable ...

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Номер записи: 58
22-09-2022 дата публикации

Multifunctional liquid crystalline photoreactive polymers for polarization holography

Номер: US20220298420A1
Автор: Junren WANG, Lu Lu, Mengfei WANG, Ryan LI
Принадлежит: Meta Platforms Technologies LLC

A multifunctional liquid crystalline photoreactive polymer in which at least some of the polymer side-chains have an ultraviolet photoreactive moiety and at least some of the polymer side-chains have a calamitic mesogenic moiety are provided. At least some of the polymer side-chains have a photo-curable moiety a thermal-curable moiety. In some embodiments, the polymer is in the form of a co-polymer. In some embodiments, the polymer is in the form of a ter-polymer. The polymer is used in applications that require stable birefringement films. Such films are produced from the polymer by subjecting the polymer to ultra-violet light to cause side-chain cross-linking thereby inducing anisotropy. The anisotropy is then amplified by exposing the polymer to an elevated temperature.

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Номер записи: 59
22-09-2022 дата публикации

RECORDING A LATENT HOLOGRAPHIC GRATING AND AMPLIFICATION OF ITS DYNAMIC RANGE

Номер: US20220299867A1
Автор: ALIM Marvin Dion, II Lafe Joseph, LANE Austin, Purvis
Принадлежит:

Methods of recording volume Bragg gratings are provided. A recording medium includes matrix polymer precursor, inimer comprising a polymerizable functional group and a controlled radical reactive group, photoinitiator more reactive with the polymerizable functional group than the controlled radical reactive group in the presence of an excitation source, and a photoredux catalyst. The medium is cured to form a support matrix. The medium is exposed to the excitation source, forming a latent grating having bright fringes and dark fringes. Polymerized inimer is more concentrated in the bright fringes than in the dark fringes. A high refractive index monomer reactive with the controlled radical reactive group is diffused into the medium and exposed to light to cause controlled radical polymerization between the high refractive index monomer and the controlled radical reactive group of the polymerized inimer, driving up a refractive index of the bright fringes relative to the dark fringes. 1. A method of recording a volume Bragg grating , the method comprising: a matrix polymer precursor,', 'an inimer comprising a polymerizable functional group and a first controlled radical reactive group,', 'a photoinitiator system that is more reactive with the polymerizable functional group than the first controlled radical reactive group in the presence of an excitation source, and', 'a photoredox catalyst;, '(A) forming a recording medium comprising(B) curing the recording medium thereby forming a support matrix from the matrix polymer precursor;(C) exposing the recording medium to the excitation source through a pattern for a period of time, causing the photoinitiator system to react with the polymerizable functional group of the inimer and polymerize the polymerizable functional group of the inimer to the support matrix thus forming a latent grating image of the volume Bragg grating within the recording medium, wherein the latent grating image comprises a plurality of bright ...

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Номер записи: 60
22-09-2022 дата публикации

RECORDING A LATENT HOLOGRAPHIC GRATING AND AMPLIFICATION OF ITS DYNAMIC RANGE

Номер: US20220299868A1
Автор: ALIM Marvin Dion, II Lafe Joseph, LANE Austin, Purvis
Принадлежит:

Recording a volume Bragg grating is effectuated by a recording medium formed from a matrix polymer precursor including a controlled radical reactive group, a photoactive base monomer, and a photoinitiator system more reactive with the photoactive base monomer than the controlled radical reactive group in the presence of an excitation source, and a photoredox catalyst. The medium is cured thereby forming a support matrix from the matrix polymer precursor. Exposure to the excitation source through a pattern causes the photoinitiator to polymerize the base monomer, forming a latent grating of the Bragg grating. The latent grating has bright and dark fringes determined by the pattern. The concentration of polymerized base polymer is higher in the bright fringes than in the dark fringes. The exposing causes a portion of the matrix to diffuse into the dark fringes. The support matrix has a lower refractive index than the polymerized photoactive base monomer. 1. A method of recording a volume Bragg grating , the method comprising: a matrix polymer precursor including a controlled radical reactive group,', 'a photoactive base monomer,', 'a photoinitiator system that is more reactive with the photoactive base monomer than the controlled radical reactive group in the presence of an excitation source, and', 'a photoredox catalyst;, 'forming a recording medium comprisingcuring the recording medium thereby forming a support matrix from the matrix polymer precursor; a concentration of polymerized base polymer is higher in the plurality of bright fringes than in the plurality of dark fringes,', 'the exposing causes a portion of the support matrix to diffuse into the plurality of dark fringes, and', 'the support matrix has a lower refractive index than the polymerized photoactive base monomer;, 'exposing the support matrix to the excitation source through a pattern for a period of time causing the photoinitiator system to polymerize the photoactive base monomer within the support ...

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Номер записи: 61
22-09-2022 дата публикации

SPATIALLY VARYING DYNAMIC RANGE IN HOLOGRAPHIC GRATINGS

Номер: US20220299938A1
Автор: ALIM Marvin Dion, II Lafe Joseph, LANE Austin, Purvis
Принадлежит:

Methods of recording a volume Bragg grating are provided. A recording medium is formed from a matrix polymer precursor, an inimer comprising a polymerizable functional group and a controlled radical reactive group, a first photoinitiator system that is more reactive with the polymerizable functional group than the controlled radical reactive group in the presence of an excitation source, and a photoredox catalyst. The medium is cured thereby forming a support matrix. The medium is exposed to light causing the first photoinitiator system to react with the polymerizable functional group and to polymerize the inimer within the support matrix thus forming a latent grating image of the volume Bragg grating within the medium. The latent grating image comprises a plurality of bright fringes and a plurality of dark fringes. A concentration of polymerized inimer is higher in the plurality of bright fringes than in the plurality of dark fringes. 1. A method of recording a volume Bragg grating , the method comprising: a matrix polymer precursor,', 'an inimer comprising a polymerizable functional group and a controlled radical reactive group,', 'a first photoinitiator system that is more reactive with the polymerizable functional group than the controlled radical reactive group in the presence of an excitation source, and', 'a photoredox catalyst;, 'forming a recording medium comprisingcuring the recording medium thereby forming a support matrix from the matrix polymer precursor;exposing the recording medium to light within a first wavelength range for a period of time, causing the first photoinitiator system to react with the polymerizable functional group of the inimer and to polymerize the inimer within the support matrix thus forming a latent grating image of the volume Bragg grating within the recording medium, wherein the latent grating image comprises a plurality of bright fringes and a plurality of dark fringes, and wherein a concentration of polymerized inimer is ...

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Номер записи: 62
30-05-2019 дата публикации

Systems, devices, and methods for aperture-free hologram recording

Номер: US20190163126A1
Автор: John Cormier
Принадлежит: North Inc

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium.

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Номер записи: 63
30-05-2019 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR APERTURE-FREE HOLOGRAM RECORDING

Номер: US20190163127A1
Автор: Cormier John
Принадлежит:

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium. 1. A holographic recording medium (“HRM”) comprising a single contiguous layer of holographic material , the HRM further comprising:a recording area, wherein in the recording area a holographic material of the HRM is photopolymerizable to a first degree;a bleached area, wherein in the bleached area the holographic material of the HRM is not photopolymerizable; anda boundary area positioned between the recorded area and the unrecorded area, wherein in the boundary area the holographic material of the HRM is photopolymerizable to a second degree, wherein the first degree to which the holographic material of the HRM is photopolymerizable in the recording area is higher than the second degree to which the holographic material of the HRM is photopolymerizable in the boundary area and wherein the boundary area has a thickness as measured in at least one direction perpendicular to the principal axis of the HRM less than the thickness of the HRM as measured parallel to the principal axis of the HRM.2. The HRM of wherein the thickness of the HRM as measured parallel to the principal ...

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Номер записи: 64
30-05-2019 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR APERTURE-FREE HOLOGRAM RECORDING

Номер: US20190163128A1
Автор: Cormier John
Принадлежит:

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium. 1. A method of fabricating a holographic recording medium (“HRM”) , the method comprising: at least one obstructive area wherein the at least one obstructive area is configured to shield a portion of the layer of holographic material from light exposure; and', 'at least one permissive area wherein the at least one permissive area is configured to expose a portion of the layer of holographic material to light;, 'applying a mask to a layer of holographic material, the mask comprisingbleaching the masked layer of holographic material, wherein bleaching the masked layer of holographic material includes exposing the at least one permissive area of the mask to light; andremoving the mask from the layer of holographic material.2. The method of wherein the layer of holographic material comprises a front surface and a back surface claim 1 , and wherein applying a mask to the layer of holographic material includes:applying a front mask to the front surface of the layer of holographic material, wherein the front mask comprises at least one permissive area and at least one obstructive ...

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Номер записи: 65
30-05-2019 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR APERTURE-FREE HOLOGRAM RECORDING

Номер: US20190163129A1
Автор: Cormier John
Принадлежит:

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium. 1. A method of recording a hologram , the method comprising:mounting a layer of holographic material in an aperture-free hologram recording assembly; at least one obstructive area wherein the at least one obstructive area is configured to shield a portion of the layer of holographic material from light exposure; and', 'at least one permissive area wherein the at least one permissive area is configured to expose a portion of the layer of holographic material to light;, 'applying a mask to the layer of holographic material, the mask comprisingilluminating the layer of holographic material with laser light, wherein illuminating the layer of holographic material with laser light includes routing laser light from a laser light source along an aperture-free optical path to the layer of holographic material;removing the mask from the HRM; andbleaching the HRM.2. The method of wherein routing the laser light from the laser light source along an aperture-free optical path to the layer of holographic material includes:splitting the laser light with a beamsplitter to form an object ...

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Номер записи: 66
30-05-2019 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR APERTURE-FREE HOLOGRAM RECORDING

Номер: US20190163130A1
Автор: Cormier John
Принадлежит:

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium. 1. A method of recording a hologram , the method comprising:mounting a layer of holographic material in an aperture-free hologram recording assembly; at least one obstructive area wherein the at least one obstructive area is configured to shield a portion of the layer of holographic material from light exposure; and', 'at least one permissive area wherein the at least one permissive area is configured to expose a portion of the layer of holographic material to light;, 'applying a mask to the layer of holographic material, the mask comprisinggenerating a laser light signal with at least one laser light source;splitting the laser light signal with a beamsplitter to form an object beam and a reference beam;routing the object beam to illuminate the layer of holographic material;shaping the object beam to a desired cross-section at the layer of holographic material;routing the reference beam to illuminate the layer of holographic material;shaping the reference beam to a desired cross-section at the layer of holographic material;generating a pattern of optical fringes in at least ...

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Номер записи: 67
30-05-2019 дата публикации

SYSTEMS, DEVICES, AND METHODS FOR APERTURE-FREE HOLOGRAM RECORDING

Номер: US20190163131A1
Автор: Cormier John
Принадлежит:

Systems, devices, and methods for aperture-free hologram recording are described. The apertures typically used for hologram recording create unwanted secondary holograms by diffracting light. Aperture-free hologram recording eliminates these unwanted secondary holograms. Aperture-free hologram recording includes applying a mask to the holographic recording medium. The mask controls the size of the recorded hologram like an aperture but does not create unwanted secondary holograms. Hologram fringes are only present in the desired recording area and a thin boundary region. The mask may be present during recording, or the mask may be used to pre-bleach the holographic recording medium. Pre-bleaching the holographic recording medium renders a portion of the holographic recording medium insensitive to light, the hologram is recorded in the light-sensitive portions of the holographic recording medium. 1. A method of recording a hologram , the method comprising:mounting a layer of holographic material in an aperture-free hologram recording assembly; at least one obstructive area wherein the at least one obstructive area is configured to shield a portion of the layer of holographic material from light exposure; and', 'at least one permissive area wherein the at least one permissive area is configured to expose a portion of the layer of holographic material to light;, 'applying a mask to a layer of holographic material, the mask comprisinggenerating a laser light signal with at least one laser light source;splitting the laser light signal with at least one beamsplitter to form N object beams and M reference beams, where N and M are both integers that are greater than or equal to 1;routing the N object beams to illuminate the layer of holographic material;shaping the N object beams to N respective cross-sections at the layer of holographic material;routing the M reference beams to illuminate the layer of holographic material; andshaping the M reference beams to M respective ...

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Номер записи: 68
21-06-2018 дата публикации

SPECTACLE LENS AND METHOD FOR PRODUCING A SPECTACLE LENS

Номер: US20180173007A1
Автор: Lindig Karsten, Pütz Jörg, Rifai Katharina
Принадлежит:

A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described. 1. A spectacle lens , comprising:a transparent substrate, andat least one holographic optical element-capable (HOE-capable) polymer layer arranged on the transparent substrate, wherein the HOE-capable polymer layer is suitable for forming a holographic optical element.2. The spectacle lens of claim 1 , wherein the spectacle lens further comprises:a transparent hard layer arranged on the transparent substrate,wherein the at least one HOE-capable polymer layer is arranged between the transparent substrate and the hard layer.3. The spectacle lens of claim 1 ,wherein a layer thickness of each of the at least one HOE-capable polymer layer is in the range of 1 μm-100 μm, or in the range of 50 μm-100 μm.4. The spectacle lens of claim 1 ,wherein the at least one HOE-capable polymer layer is arranged on a front side of the transparent substrate.5. The spectacle lens of claim 1 ,wherein a first HOE-capable polymer layer is arranged on a front side of the transparent substrate, andwherein a second HOE-capable polymer layer is arranged on a back side of the transparent substrate.6. The spectacle lens of claim 1 ,wherein the HOE-capable polymer layer comprises a photoreactive component and/or an HOE polymer and/or a polymer matrix, andwherein the spectacle lens further comprises:a primer layer that comprises the polymer matrix and/or a further polymer.7. Spectacles claim 1 , comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the spectacle lens of , and'}a light source assembly, which is configured to emit light in the direction of the spectacle lens,wherein the HOE-capable polymer layer is configured to reflect the light emitted by the light source assembly back to the eye of the wearer of the ...

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Номер записи: 69
06-06-2019 дата публикации

SHAPED BODY HAVING A VOLUME HOLOGRAM AND METHOD FOR PRODUCTION THEREOF

Номер: US20190171160A1
Автор: Fäcke Thomas, Flemm Ute, GROSSER Ulrich, Hagen Rainer, Orselli Enrico
Принадлежит:

The present invention concerns a method for the production of a moulded body containing at least one volume hologram by means of injection moulding, comprising the following method steps: 115.-. (canceled)16. A method for the production of a moulded body containing at least one volume hologram by means of injection moulding , comprising the following method steps:provision of a hologram film composite having two sides comprising at least one photopolymer layer with at least one volume hologram, a shear protective layer and a substrate layer, and optionally, further composite film layers,insertion of the hologram film composite into a metallic injection mould, such that one side of the hologram film composite is at least partially in contact with the injection mould wall,introduction of a molten thermoplastic polymer for the production of the moulded body, wherein at least the outermost layer of the hologram film composite on the side of the hologram film composite coming into contact with the molten polymer contains essentially the same polymer raw materials as the molten thermoplastic polymer, extrusion coating of the hologram film composite with the molten thermoplastic polymer, andsolidification of the molten thermoplastic polymer.17. The method according to claim 16 , wherein the hologram film composite is inserted into the metallic injection mould such that the substrate layer is inserted facing the metallic injection mould with its side that faces away from the photopolymer layer claim 16 , such that the substrate layer is at least partially in contact with the injection mould wall.18. The method according to claim 16 , wherein the shear protective film is formed by a protective lacquer.19. The method according to claim 16 , wherein the hologram film composite is inserted into the metallic injection mould such that the photopolymer layer is inserted with its free surface facing the metallic injection mould claim 16 , such that the photopolymer layer is at ...

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Номер записи: 70
02-07-2015 дата публикации

METHOD FOR SYNTHESIS AND FORMATION OF A DIGITAL HOLOGRAM FOR USE IN MICROLITHOGRAPHY

Номер: US20150185695A1
Автор: BORISOV Mikhail, CHELYUBEEV Dmitry, CHERNIK Vitaly, Gavrikov Aleksandr, MIKHEEV Peter, RAKHOVSKY Vadim, SHAMAEV Aleksey
Принадлежит:

The invention describes a method of manufacturing a holographic mask capable of producing an image pattern that contains elements of a sub-wavelength size along with decreased deviations from the original pattern. The original pattern is converted into a virtual electromagnetic field and is divided into a set of virtual cells with certain amplitudes and phases, which are mathematically processed for obtaining the virtual digital hologram. The calculation of the latter is based on parameters of the restoration wave, which is used to produce the image pattern from the mask, and on computer optimization by variation of amplitudes and phases of the set of virtual cells and/or parameters of the virtual digital hologram for reaching a satisfactory matching between the produced image pattern and the original pattern. The obtained virtual digital hologram provides physical parameters of the actual digital hologram that is to be manufactured. 1. A method for synthesis and formation of a digital hologram for use in microlithography comprising the following steps:(a) introducing an orthogonal coordinate system x, y, z having three mutually perpendicular axes X-X, Y-Y, and Z-Z, choosing a point O on the axis Z-Z, and passing through this point a virtual digital hologram plane (VDHP), which is perpendicular to the axis Z-Z and which is to be used as a plane of a virtual digital hologram (VDH) for manufacturing the actual digital hologram;(b) selecting an orthogonal coordinate system x′, y′, z having three mutually perpendicular axes X′-X′, Y′-Y′, and Z-Z, choosing a point O′ on the axis Z-Z that is spaced from the virtual digital hologram plane (VDHP) at a certain distance “d” and passing through this point O′ a virtual original pattern plane (VOPP) that contains a virtual original pattern and is perpendicular to said arbitrary axis Z-Z, and wherein the virtual original pattern that contains image elements is to be used for subsequent synthesis of the virtual digital hologram;(c ...

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Номер записи: 71
02-07-2015 дата публикации

METHOD OF MICROLITHOGRAPHY WITH THE USE OF DIVERGENT/CONVERGENT BEAMS FOR HOLOGRAPHIC RESTORATION OF AN IMAGE

Номер: US20150185696A1
Автор: RAKHOVSKY Vadim
Принадлежит:

The invention describes a method of manufacturing a holographic mask capable of producing an image pattern that contains elements of a subwavelength size along with decreased deviations from the original pattern. The original pattern is converted into a virtual electromagnetic field and is divided into a set of virtual cells with certain amplitudes and phases, which are mathematically processed for obtaining the virtual digital hologram. In the calculation of virtual components of the hologram, the method includes a step, wherein as a result of the preliminary divergence of the initial light beam, the entire virtual hologram is increased in proportion to the degree of the divergence of the initial light beam. This facilitate virtual processing of the fine and delicate elements of the virtual hologram. Upon completion of the virtual processing, the final data needed for manufacturing of the actual digital hologram, e.g., on a lithograph, are obtained. 1. A method of microlithography with the use of divergent/convergent beams for holographic restoration of an image comprising the steps of:(a) introducing an orthogonal coordinate system x, y, z having three mutually perpendicular axes X-X, Y-Y, and Z-Z, choosing a point O on the axis Z-Z, and passing through this point a virtual digital hologram plane (VDHP), which is perpendicular to the axis Z-Z and which is to be used as a plane of a virtual digital hologram (VDH) for manufacturing the actual digital hologram;(b) selecting an orthogonal coordinate system x′, y′, z having three mutually perpendicular axes X′-X′, Y′-Y′, and Z-Z, choosing a point O′ on the axis Z-Z that is spaced from the virtual digital hologram plane (VDHP) at a certain distance “d” and passing through this point O′ a virtual original pattern plane (VOPP) that contains a virtual original pattern and is perpendicular to said arbitrary axis Z-Z, and wherein the virtual original pattern that contains image elements is to be used for subsequent synthesis ...

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Номер записи: 72
28-05-2020 дата публикации

Holographic medium containing a photopolymer layer for holographic exposure and a highly resistant coating layer

Номер: US20200166888A1
Автор: Benjamin HERZBERG, Dennis Hönel, Heinz-Günter AUWEILER, Serguei Kostromine, Thomas Fäcke, Thomas Rölle
Принадлежит: Covestro Deutschland AG

The invention relates to a holographic medium containing a layer construction comprising a curable protective layer C and a photopolymer layer B, to a method for producing such a holographic medium, to a method for producing a hologram using such a holographic medium, to a sealed holographic medium and to the use of such a holographic medium for producing a hologram.

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Номер записи: 73
28-06-2018 дата публикации

VEHICLE INFORMATION DISPLAY ASSEMBLY, SYSTEM AND METHOD

Номер: US20180181067A1
Автор: HASEDZIC Elvir, KHAN Javid
Принадлежит:

A mirror and information image display assembly () for a vehicle, a holographic information image display system (), a vehicle () comprising such an assembly, and a method of providing image information to an occupant of a vehicle are disclosed. The assembly has a reflective layer () and an image display means (), for displaying image information to an occupant of the vehicle. The image display means comprises a hologram (), and a lighting means comprising a light source () for illuminating the hologram. 1. A mirror and information image display assembly for a vehicle , the assembly comprising:a reflective layer; andan image display system configured to display image information to an occupant of the vehicle,the image display system comprising:a hologram; anda light source for illuminating the hologram.2. The assembly according to claim 1 , wherein the image display system is disposed in front of the reflective layer.3. The assembly according to claim 2 , wherein the hologram forms a hologram layer claim 2 , and the image display system comprises a glass layer which is disposed either between the hologram layer and the reflective layer or in front of the hologram layer.4. (canceled)5. The assembly according to claim 3 , wherein the glass layer is a wedged glass layer.6. The assembly according to claim 1 , wherein the reflective layer is at least partially transmissive claim 1 , and wherein the image display system is disposed behind the reflective layer.7. The assembly according to claim 1 , wherein the hologram is etched into a substrate.8. The assembly according to claim 1 , wherein the image display system comprises a plurality of holograms.9. The assembly according to claim 8 , wherein the plurality of holograms are multiplexed.10. The assembly according to claim 9 , wherein the plurality of multiplexed holograms are one of: wavelength-multiplexed holograms claim 9 , angular-multiplexed holograms claim 9 , spatially-multiplexed holograms claim 9 , edge- ...

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Номер записи: 74
13-06-2019 дата публикации

WIDE FIELD-OF-VIEW HOLOGRAPHIC SKEW MIRRORS

Номер: US20190179063A1
Автор: ANDERSON Kenneth E., AYRES MARK R., Schlottau Friso, Urness Adam
Принадлежит:

A holographic skew mirror has a reflective axis, or skew axis, that can be tilted with respect to its surface normal. Tilting the skew axis in two dimensions with respect to the surface normal expands the holographic skew mirror's possible field of view, e.g., to 60 or more. These additional angles can be accessed using an out-of-plane writing geometry with matched total internal grazing extension rotation (TIGER) prisms. 1. An optical reflective device comprising: the grating structure is structured to principally reflect incident light as reflected light;', 'the incident light includes a first wavelength;', 'the reflected light includes the first wavelength;', 'the incident light of the first wavelength and the reflected light of the first wavelength form an angle bisected by a reflective axis;', 'the reflective axis varies by less than 1 degree where the incident light is incident upon the grating medium at a range of internal angles of incidence spanning at least 15 degrees; and', 'the reflective axis differs from a surface normal of the grating medium by at least 2.0 degrees., 'a grating structure residing in a grating medium, wherein2. The optical reflective device of claim 1 , wherein the reflective axis varies by less than 1 degree where the incident light is incident upon the grating medium at a range of internal angles of incidence spanning at least 30 degrees.3. The optical reflective device of claim 1 , wherein the grating structure includes one or more holograms having a grating frequency (|K|) spanning a range of at least 2.00×10radians per meter.4. The optical reflective device of claim 1 , wherein:the incident light includes a second wavelength;the reflected light includes the second wavelength;the second wavelength differs from the first wavelength by at least about 50 nm.5. The optical reflective device of claim 4 , wherein:the incident light includes a third wavelength;the reflected light includes the third wavelength;the third wavelength differs ...

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Номер записи: 75
15-07-2021 дата публикации

Methods for Fabricating Optical Waveguides

Номер: US20210216040A1
Автор: Alastair John Grant, Jonathan David Waldern, Milan Momcilo Popovich
Принадлежит: DigiLens Inc

Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3:1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam.

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Номер записи: 76
05-07-2018 дата публикации

TECHNIQUES FOR PROCESSING HOLOGRAPHIC RECORDING MEDIA

Номер: US20180188689A1
Автор: Guillaumee Mickael, MOSER Christophe, ZIEGLER DAVID
Принадлежит: Intel Corporation

Various embodiments are generally directed to techniques for processing holographic recording media. Some embodiments are particularly directed to processing a raw holographic recording medium into an apodized holographic recording medium. For example, a raw holographic recording medium may include a plurality of photosensitive molecules uniformly distributed throughout that are able to record an interference pattern to create a hologram. However, when a photosensitive molecule is desensitized, such as by exposure to incoherent light, its photosensitivity is lost and the molecule may no longer be able to record an interference pattern of coherent light. Various embodiments described herein may include an apodized holographic recording medium that has been exposed to incoherent light in a manner to desensitize some photosensitive molecules therein such that the remaining photosensitive molecules have a non-uniform distribution. 1. An apparatus , comprising:a holographic recording medium to comprise a top surface, a bottom surface, and a set of photosensitive molecules with a uniform distribution between the top surface and the bottom surface;a first beam of incoherent light arranged at a first angle of incidence with respect to the top surface; anda second beam of incoherent light arranged at a second angle of incidence with respect to the bottom surface, the first and second beams of incoherent light to desensitize a first subset of the set of photosensitive molecules to leave a second subset of photosensitive molecules with a non-uniform distribution between the top surface and the bottom surface of the holographic recording medium.2. The apparatus of claim 1 , the non-uniform distribution to correlate to a non-uniform apodization function.3. The apparatus of claim 1 , the non-uniform distribution between the top and bottom surfaces of the holographic recording medium such that a lower concentration of photosensitive molecules is proximate the top and bottom ...

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Номер записи: 77
05-07-2018 дата публикации

ROLLING HOLOGRAPHIC LITHOGRAPHY

Номер: US20180188690A1
Автор: Kallos Efthymios, Kobrin Boris, Palikaras Georgios, Seitz Oliver
Принадлежит:

Holograms are generated using a rotatable transparent cylinder and a coherent light source placed inside or outside of such cylinder to record a hologram in a photosensitive film having a reflective film on one side. Recording is done in continuous mode while cylinder is rotating and photosensitive film is translating underneath in contact with cylinder due to friction forces provided by a layer of sticky polymer. 1. A method for recording a hologram , comprising:a) transmitting coherent radiation from inside a transparent drum through a wall of the transparent drum;b) while transmitting the coherent radiation, rotating the transparent drum and contacting the transparent drum with a photosensitive layer between the cylinder and a reflective layer; andc) reflecting the coherent radiation that is transmitted through the transparent drum and the photosensitive layer back through the photo sensitive layer, wherein the photosensitive layer reacts to the coherent radiation transmitted from inside the transparent cylinder and the coherent radiation that is reflected back through the photosensitive layer in a way that varies a refractive index of the photosensitive layer in a direction perpendicular to a surface of the photosensitive layer.2. The method of claim 1 , wherein the transparent drum is coated with a sticky polymer layer.3. The method of wherein the sticky polymer layer includes polydimethylsiloxane.4. The method of claim 1 , wherein a thickness and refractive index of the photosensitive layer a number and spacing of fringes of refractive index variation in the photosensitive layer are configured to act as an interference filter that can selectively reflect incident radiation of one or more selected vacuum wavlengths5. The method of claim 1 , wherein the reflective layer is formed on the photosensitive layer.6. The method of claim 5 , wherein the reflective layer includes a metal film sputter coated onto the photosensitive layer.7. The method of claim 1 , wherein ...

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Номер записи: 78
13-07-2017 дата публикации

SELECTION METHOD FOR ADDITIVES IN PHOTOPOLYMERS

Номер: US20170199494A1
Автор: Bruder Friederich-Karl, Diedrich Christian, Fäcke Thomas, Hönel Dennis, Roelle Thomas, Weiser Marc-Stephan
Принадлежит:

The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media. 111.-. (canceled)12. A method for preparing a photopolymer formulation comprising providing at least one plasticizer , wherein the at least one plasticizer has a volatility TGA95 of >100° C. and a refractive index nof ≦1.4600 , providing a matrix polymer , a writing monomers and a photoinitiator , and preparing the photopolymer formulation by incorporating the at least one plasticizer into the photopolymer formulation.13. The method according to claim 12 , wherein the plasticizer has a volatility TGA95 of >120° C. and the refractive index thereof nD is ≦1.4300.14. A photopolymer formulation comprising matrix polymers claim 12 , writing monomers and photoinitiators claim 12 , wherein the photopolymer formulation is prepared by the method according to and wherein the matrix polymers comprise polyurethanes.15. The photopolymer formulation according to claim 14 , wherein the photoinitiators comprise an anionic claim 14 , cationic or neutral dye and a coinitiator.16. The photopolymer formulation according to claim 14 , wherein the at least one plasticizer comprises urethanes claim 14 , and wherein the urethane is optionally substituted by at least one fluorine atom.18. The photopolymer formulation according to claim 17 , wherein at least one of the radicals R1 claim 17 , R2 claim 17 , R3 is substituted by at least one fluorine atom.19. The photopolymer formulation according to claim 17 , wherein R1 represents an organic radical having at least one fluorine atom.21. The photopolymer formulation according to claim 14 , wherein the writing monomers comprise a polyfunctional writing monomer.22. The ...

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Номер записи: 79
30-07-2015 дата публикации

PHOTOSENSITIVE COMPOSITION FOR VOLUME HOLOGRAM RECORDING, PHOTOSENSITIVE SUBSTRATE FOR VOLUME HOLOGRAM RECORDING, AND VOLUME HOLOGRAM RECORDED MEDIUM

Номер: US20150212487A1
Автор: Azakami Minoru, Eto Koji, Hamade Eriko, Miura Keisuke, Oikawa Nobuko
Принадлежит:

The present invention is to provide: a photosensitive composition for volume hologram recording and a photosensitive substrate for volume hologram recording, which provide increased sensitivity during hologram recording and a high refractive index modulation amount, and which do not inhibit the decolorization of the sensitizing dye; and a volume hologram recorded medium which provides high-luminance hologram images with increased productivity. Disclosed is a photosensitive composition for volume hologram recording, comprising: a photopolymerizable monomer, a photopolymerization initiator, a sensitizing dye for sensitizing the photopolymerization initiator, a binder resin, and a thiol group-containing compound, wherein the photopolymerizable monomer contains a photoradically polymerizable monomer and a photocationically polymerizable monomer; wherein the thiol group-containing compound is a chain transfer agent for the photoradically polymerizable monomer and is a polyfunctional secondary thiol compound having two or more secondary thiol groups per molecule; and wherein the content of the thiol group-containing compound is 1.5 to 30 parts by mass with respect to 100 parts by mass of the photoradically polymerizable monomer. 1. A photosensitive composition for volume hologram recording , comprising:a photopolymerizable monomer,a photopolymerization initiator,a sensitizing dye for sensitizing the photopolymerization initiator,a binder resin, anda thiol group-containing compound,wherein the photopolymerizable monomer contains a photoradically polymerizable monomer and a photocationically polymerizable monomer;wherein the thiol group-containing compound is a chain transfer agent for the photoradically polymerizable monomer and is a polyfunctional secondary thiol compound having two or more secondary thiol groups per molecule; andwherein the content of the thiol group-containing compound is 18 to 30 parts by mass with respect to 100 parts by mass of the photoradically ...

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Номер записи: 80
18-06-2020 дата публикации

PHOTOPOLYMER COMPOSITION

Номер: US20200192218A1
Автор: CHANG Yeongrae, JANG Seokhoon, KIM Heon, Kwak Sooyoung, KWON Se Hyun
Принадлежит: LG CHEM, LTD.

The present disclosure is to provide a photopolymer composition including a polymer matrix or a precursor thereof having a specific chemical structure; a photoreactive monomer; and a photoinitiator. The present disclosure is also to provide a hologram recording medium, an optical element, and a holographic recording method using the photopolymer composition. 3. The photopolymer composition of claim 1 ,wherein the (meth)acrylate-based (co)polymer has an equivalent weight of the silane-based functional group of 300 g/equivalent to 2000 g/equivalent.4. The photopolymer composition of claim 1 ,wherein the silane cross-linking agent is contained in an amount of 10 parts by weight to 90 parts by weight based on 100 parts by weight of the (meth)acrylate-based (co)polymer.5. The photopolymer composition of claim 1 ,wherein the silane cross-linking agent comprises a linear polyether main chain having a weight average molecular weight of 100 to 2000 and a silane-based functional group bound to the main chain as a terminal group or a branched chain.6. The photopolymer composition of claim 5 ,wherein the silane-based functional group is bound to the polyether main chain by a urethane bond.7. The photopolymer composition of claim 1 ,wherein the silane cross-linking agent has an equivalent weight of the silane-based functional group of 200 g/equivalent to 1000 g/equivalent.8. The photopolymer composition of claim 1 ,wherein the photoreactive monomer comprises a polyfunctional (meth)acrylate monomer or a monofunctional (meth)acrylate monomer.9. The photopolymer composition of claim 1 ,wherein the photoreactive monomer has a refractive index of 1.5 or more.10. The photopolymer composition of claim 1 , comprising:1 wt % to 80 wt % of the polymer matrix or the precursor thereof;1 wt % to 80 wt % of the photoreactive monomer; and0.1 wt % to 20 wt % of the photoinitiator.11. The photopolymer composition of claim 1 ,further comprising a fluorine-based compound.12. The photopolymer ...

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Номер записи: 81
18-06-2020 дата публикации

METHOD FOR OBTAINING FULL-COLOR HOLOGRAM OPTICAL ELEMENT USING PHOTOPOLYMER, AND HEAD-UP DISPLAY APPARATUS WITH THE SAME

Номер: US20200192282A1
Автор: Kim Nam, KWON Ki Chul, LIM Young Tae, SHIN Chang Won
Принадлежит: CHUNGBUK NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Provided is a method of manufacturing a full-color holographic optical element in a full-color holographic optical element manufacturing apparatus including a lens and a holographic recording medium located farther away than a focal length of the lens, the method including: allowing a signal beam including a mixture of laser beams having wavelengths of R (Red), G (Green), and B (Blue) to be incident on the lens; and recording a hologram in such a manner that a reference beam including a mixture of laser beams having wavelengths of R, G, and B is allowed to be incident on the holographic recording medium, wherein the holographic recording medium is configured with a single medium. 1. A method of manufacturing a full-color holographic optical element in a full-color holographic optical element manufacturing apparatus including a lens and a holographic recording medium located farther away than a focal length of the lens , the method comprising:allowing a signal beam including a mixture of laser beams having wavelengths of R (Red), G (Green), and B (Blue) to be incident on the lens; andrecording a hologram in such a manner that a reference beam including a mixture of laser beams having wavelengths of R, G, and B is allowed to be incident on the holographic recording medium,wherein the holographic recording medium is configured with a single medium.2. The method according to claim 1 , wherein the holographic recording medium is a photopolymer.3. The method according to claim 2 , wherein the full-color holographic optical element manufacturing apparatus measures reaction speeds of the laser beams of R claim 2 , G claim 2 , and B when recording a holographic grating in the photopolymer and sets intensities of the laser beams in a reverse order of an order of the reaction speeds of the laser beams.5. A head-up display device comprising the full-color holographic optical element manufactured by the method according to . The present invention relates to a holographic optical ...

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Номер записи: 82
06-08-2015 дата публикации

Polycarbonate-based security documents and/or documents of value with a hologram in the card body

Номер: US20150220056A1
Автор: Dennis Hönel, Friedrich-Karl Bruder, Georgios Tziovaras, Horst Berneth, Marc-Stephan Weiser, Thomas Fäcke, Thomas Rölle
Принадлежит: BAYER MATERIALSCIENCE AG

The invention relates to polycarbonate-based or copolycarbonate-based security documents and/or documents of value which contain at least one hologram integrated in the card body, and to a method for producing such security documents and/or documents of value.

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Номер записи: 83
06-08-2015 дата публикации

SECURITY DOCUMENT AND/OR DOCUMENT OF VALUE CONTAINING A VISUALLY CHANGEABLE WINDOW WITH A HOLOGRAM

Номер: US20150220057A1
Автор: Fäcke Thomas, Janke Stefan, Planken Kira, PUDLEINER Heinz, Tziovaras Georgios, Weiser Marc-Stephan
Принадлежит: BAYER MATERIALSCIENCE AG

The present invention relates to a security document and/or document of value with a hologram in a visually changeable window as a novel security element, and also to a method for producing the same. 114-. (canceled)15. A document of security and/or value , comprising at least one window , the window being formed from a multilayer assembly , wherein the multilayer assembly hasat least one layer (P) comprising at least one photopolymer and incorporating at least one hologram (H) andat least one transparent, optically switchable layer (O) which becomes non-transparent by means of heat or irradiation.16. The document of security and/or value as claimed in claim 15 , wherein the hologram (H) is a volume hologram.17. The document of security and/or value as claimed in claim 15 , wherein the transparent claim 15 , optically switchable layer (O) is a layer comprising at least one photochromic or thermochromic material.18. The document of security and/or value as claimed in claim 15 , wherein the transparent claim 15 , optically switchable layer (O) is a layer of at least one transparent thermoplastic comprising at least one photochromic or thermochromic material or composition claim 15 , preferably of at least one transparent thermoplastic polyurethane comprising at least one photochromic or thermochromic material or composition.19. The document of security and/or value as claimed in claim 15 , wherein the photopolymer in the layer (P) is a photopolymer prepared from a photopolymer formulation comprising a polyol component claim 15 , a polyisocyanate component claim 15 , a writing monomer and a photoinitiator.21. The document of security and/or value as claimed in claim 19 , wherein the writing monomer in the photopolymer formulation comprises at least one monofunctional and/or one multifunctional urethane (meth)acrylate.22. The document of security and/or value as claimed in claim 15 , wherein it is a document of identification claim 15 , preferably an ID card.23. The ...

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Номер записи: 84
27-07-2017 дата публикации

METHOD FOR FORMING A MULTIPLE CHARGE GENERATING PHOTOREFRACTIVE POLYMER COMPOSITE FOR HOLOGRAM WRITING

Номер: US20170212470A1
Автор: Thomas Jayan
Принадлежит:

A photorefractive (PR) polymer composite () is provided that includes a charge transporting polymer (CTP) matrix () and a photosensitizer () comprising a quantum dot (QD) material () with a first band gap () coupled to a nanoparticle material () with a second band gap () greater than the first band gap. The photosensitizer () is configured to generate a plurality of free charges () and to transfer the free charges to the CTP matrix () in response to an incident photon () on the PR polymer composite (). An apparatus () is also provided, for writing holograms of 3D perspective views of an object from different directions within the PR polymer composite (). A method () is also provided for forming the PR polymer composite. 1. A photorefractive polymer composite comprising:a charge transporting polymer (CTP) matrix; anda photosensitizer comprising a quantum dot (QD) material with a first band gap coupled to a nanoparticle material with a second band gap greater than the first band gap;wherein the photosensitizer is configured to generate a plurality of free charges and to transfer the free charges to the CTP matrix in response to an incident photon on the polymer composite.2. The photorefractive polymer composite of wherein the QD material comprises one of Graphene claim 1 , lead sulfide (PbS) claim 1 , lead selenide (PbSe) and indium phosphide (InP).3. The photorefractive polymer composite of wherein the nanoparticle material is one of TiO claim 1 , ZnO and ZnS.4. The photorefractive polymer composite of wherein the first band gap of the QD material is configured such that an energy of each incident photon is an integral multiple of the first band gap.5. The photorefractive polymer composite of wherein the first band gap is configured such that the energy of each incident photon is up to 5 times the first band gap.6. The photorefractive polymer composite of wherein the first band gap of the QD material is configured such that an energy of each incident photon is at ...

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Номер записи: 85
26-07-2018 дата публикации

METHOD FOR HOLOGRAPHIC MASTERING AND REPLICATION

Номер: US20180210396A1
Автор: GRANT Alastair John, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens, Inc.

A method for producing holograms with a multiplicity of holographic prescriptions from a single master is provided. A multiplicity of holographic substrates each having a first hologram is stacked on a second holographic recording medium substrate. The first hologram is designed to diffract light from a first direction into a second direction. When expose to illumination from the first direction zero order and diffracted light from each first hologram interfere in the second holographic recording medium substrate forming a second hologram. The second hologram is then copied into a third holographic recording medium substrate to provide the final copy hologram. 1. A method for mastering and replicating holograms , the method comprising:a) providing N substrates each containing a first hologram for diffracting incident light from a first direction into diffracted light in a second direction; providing a second holographic recording medium; and providing a third holographic recording medium;b) stacking in sequence the first holograms 1-N onto said second holographic recording medium;c) illuminating external surface of said first hologram N with light of a first polarization in a first direction;d) said first holograms 1-N diffracting said light into zero order light in said first direction and diffracted light in said second direction;e) said first direction light and said second direction light interfering in said second holographic recording medium to form a second hologram;f) placing said second hologram in contact with said third holographic recording medium;g) illuminating external surface of said second hologram with light in said first direction;h) said second hologram diffracting said light into zero order light in said first direction and diffracted light in said second direction; andi) said diffracted and first order light interfering in said third holographic recording medium to form a third hologram.2. The method of wherein said steps c) to i) are repeated ...

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Номер записи: 86
25-06-2020 дата публикации

Holographic Writing Method and Holographic Writing Apparatus

Номер: US20200201251A1
Автор: JOO Kyung-Il, KA Jae-Won, KIM Hak-Rin, YEON Ae-Jin, YI Mi-Hye
Принадлежит:

Disclosed are a holographic writing method and apparatus capable of re-writing (updating) holographic information and quickly writing the holographic information with high efficiency. In an embodiment, a holographic writing method for writing holographic information by emitting a beam at a holographic recording medium containing a photo-responsable polymer material having photoisomerization characteristics that change a molecular structure thereof by absorbing light energy, writes the holographic information by using a writing wavelength different from a maximum absorption wavelength in a light absorption spectrum of photoisomer molecule structures of the holographic recording medium. The maximum absorption wavelength is a wavelength at which light absorption rate is maximum in the light absorption spectrum. A difference between the light absorption rates of the photoisomer molecule structures at the writing wavelength is less than a difference between the light absorption rates of the photoisomer molecule structures at the maximum absorption wavelength. 1. A holographic writing method for writing holographic information by emitting a beam at a holographic recording medium containing a photo-responsable polymer material having photoisomerization characteristics that change a molecular structure thereof by absorbing light energy , the holographic writing method writes the holographic information by using a writing wavelength different from a maximum absorption wavelength in a light absorption spectrum of the photoisomer molecule structures of the holographic recording medium , wherein the maximum absorption wavelength is a wavelength at which light absorption rate is maximum in the light absorption spectrum , anda difference between the light absorption rates of the photoisomer molecule structures at the writing wavelength is less than a difference between the light absorption rates of the photoisomer molecule structures at the maximum absorption wavelength.2. The ...

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Номер записи: 87
04-07-2019 дата публикации

PREPARATION SYSTEM AND METHOD FOR POLYMER-DISPERSED LIQUID CRYSTAL HOLOGRAPHIC GRATING

Номер: US20190204780A1
Автор: HAN Xinyan, Zhang Menghua, Zheng Yu
Принадлежит:

A system includes a laser emitting a laser beam, a beam expander expanding the laser beam, a beam splitter prism splitting the expanded laser beam into first and second split light beams, a liquid crystal box containing polymer-dispersed liquid crystal, first and second reflectors reflecting the first and second split light beams to the liquid crystal box, respectively, and an attenuator arranged on an optical path between the beam expander and the liquid crystal box. The attenuator gradually attenuates at least one of the laser beam, the expanded laser beam, the first split light beam, or the second split light beam along a first set curve. The first split light beam and the second split light beam form interference fringes at the liquid crystal box to expose the polymer-dispersed liquid crystal to form a polymer-dispersed liquid crystal holographic grating having a diffraction efficiency decreasing along a second set curve. 1. A system for preparing a polymer-dispersed liquid crystal holographic grating comprising:a laser configured to emit a laser beam;a beam expander configured to expand the laser beam to obtain an expanded laser beam;a beam splitter prism configured to split the expanded laser beam into a first split light beam and a second split light beam;a liquid crystal box containing polymer-dispersed liquid crystal;a first reflector configured to reflect the first split light beam to the liquid crystal box;a second reflector configured to reflect the second split light beam to the liquid crystal box; andan attenuator arranged on an optical path between the beam expander and the liquid crystal box, the attenuator being configured to gradually attenuate at least one of the laser beam, the expanded laser beam, the first split light beam, or the second split light beam along a first set curve;wherein the first split light beam and the second split light beam form interference fringes at the liquid crystal box to expose the polymer-dispersed liquid crystal to ...

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Номер записи: 88
05-08-2021 дата публикации

Holographic optical apparatus, holographic optical system, and holographic display system

Номер: US20210240133A1
Автор: Hebin ZHAO, Hongshu Zhang, Jun Wu, Xiaoling Xu, Xiaoru LIU
Принадлежит: Beijing BOE Display Technology Co Ltd, BOE Technology Group Co Ltd

A holographic optical apparatus includes a beam splitting component, a transmission assembly, a focal length modulation component and an optical element. The beam splitting component splits received light into reference light and signal light that are coherent light, and outputs the reference light and the signal light. The focal length modulation component includes a plurality of local length modulation regions with different focal lengths. The optical element includes a recording medium layer with a plurality of recording regions, and each recording region is located in a light-exit path of a focal length modulation region. The transmission assembly is disposed in a light-exit path of the beam splitting component, transmit the reference light to the plurality of recording regions and transmit the signal light to the plurality of focal length modulation regions.

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Номер записи: 89
02-08-2018 дата публикации

HOLOGRAPHIC OPTICAL ELEMENT AND METHOD FOR PRODUCING THE SAME

Номер: US20180217312A1
Автор: HIRAOKA Saburou, KUBO Yuya, ONAKA Kenichi, TAMURA Kishio, Watanabe Daisuke
Принадлежит:

The present invention relates to a holographic optical element having a volume hologram recording layer containing a photopolymer, and at least one adjacent layer that is in contact with the volume hologram recording layer and contains a resin and a thiol compound. According to the present invention, a means for improving the diffraction efficiency of a holographic optical element having a volume hologram recording layer is provided. 1. A holographic optical element comprising:a volume hologram recording layer comprising a photopolymer, andat least one adjacent layer which is in contact with the volume hologram recording layer and comprises a resin and a thiol compound.2. The holographic optical element according to claim 1 , wherein the thiol compound has a molecular weight of 100 to 250.3. The holographic optical element according to claim 1 , wherein the thiol compound has a triazole skeleton claim 1 , a benzoxazole skeleton claim 1 , or a benzothiazole skeleton.4. The holographic optical element according to claim 1 , wherein the adjacent layer comprises the thiol compound in an amount of 0.005% by mass or more and 3.5% by mass or less relative to the total mass of the adjacent layer in the region whose distance is 100 nm or less from the interface between the volume hologram recording layer and the adjacent layer.5. The holographic optical element according to claim 1 , wherein the adjacent layer comprises a cellulose acylate.6. A method for producing a holographic optical element comprising:forming a photosensitive layer comprising a polymerizable monomer so that the photosensitive layer is in contact with an adjacent layer comprising a resin and a thiol compound, and then subjecting the photosensitive layer to holographic exposure to form a volume hologram recording layer.7. The method for producing a holographic optical element according to claim 6 , wherein the adjacent layer after the volume hologram recording layer is formed comprises the thiol compound ...

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Номер записи: 90
11-07-2019 дата публикации

Holographic Material Systems and Waveguides Incorporating Low Functionality Monomers

Номер: US20190212596A1
Автор: Abraham Shibu, Waldern Jonathan David
Принадлежит: DigiLens, Inc.

HPDLC material systems can be formulated in many different ways depending on the application. The HPDLC formulation can include a reactive monomer liquid crystal mixture (“RMLCM”). An RMLCM can include monomer acrylates, multi-functional acrylates, a cross-linking agent, a photo-initiator, and a liquid crystal (“LC”). The mixture (often referred to as syrup) frequently also includes a surfactant. One embodiment includes a reactive monomer liquid crystal mixture material including at least one liquid crystal, a photoinitiator dye, a coinitiators, and photopolymerizable monomers including at least one mono-functional monomer and at least one bi-functional monomer. In some embodiment, the bi-functional monomers accounts for at least 10 weight percent of the reactive monomer liquid crystal mixture material and the at least one mono-functional monomer accounts for at least 30 percent of the reactive monomer liquid crystal mixture material. 1. A reactive monomer liquid crystal mixture material comprising:at least one liquid crystal;a photoinitiator dye;a coinitiator; andphotopolymerizable monomers comprising at least one mono-functional monomer and at least one multi-functional monomer.2. The reactive monomer liquid crystal mixture material of claim 1 , wherein the at least one mono-functional monomer comprises 2-ethylhexylacrylate.3. The reactive monomer liquid crystal mixture material of claim 1 , wherein the at least one multi-functional monomer are bi-functional monomers.4. The reactive monomer liquid crystal mixture material of claim 3 , wherein the bi-functional monomers accounts for at least 2 weight percent of the reactive monomer liquid crystal mixture material.5. The reactive monomer liquid crystal mixture material of claim 4 , wherein:the bi-functional monomers accounts for at least 10 weight percent of the reactive monomer liquid crystal mixture material; andthe at least one mono-functional monomer accounts for at least 30 percent of the reactive monomer ...

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Номер записи: 91
11-07-2019 дата публикации

Methods for Fabricating Optical Waveguides

Номер: US20190212699A1
Автор: GRANT Alastair John, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens, Inc.

Mastering systems and methods of fabricating waveguides and waveguide devices using such mastering systems are described. Mastering systems for fabricating holographic waveguides can include using a master to control the application of energy (e.g. a laser, light, or magnetic beam) onto a liquid crystal substrate to fabricate a holographic waveguide into the liquid crystal substrate. Mastering systems for fabricating holographic waveguides in accordance with embodiments of the invention can include a variety of features. These features include, but are not limited to: chirp for single input beam copy (near i.e. hybrid contact copy), dual chirped gratings (for input and output), zero order grating for transmittance control, alignment reference gratings, 3:1 construction, position adjustment tooling to enable rapid alignment, optimization of lens and window thickness for multiple RKVs simultaneously, and avoidance of other orders and crossover of the diffraction beam. 1. A method for recording holograms , the method comprising:providing a waveguide cell comprising a layer of polymer dispersed liquid crystal mixture sandwiched between two substrates;providing a master grating;emitting at least one recording beam toward the master grating, wherein upon interaction with the master grating, a portion of the at least one recording beam is diffracted towards the waveguide cell; andrecording at least one volume grating within the waveguide cell using interferential exposure formed from at least the diffracted portion of the at least one recording beam.2. The method of claim 1 , wherein the master grating comprises an amplitude grating.3. The method of claim 2 , wherein the master grating comprises a chirped grating.4. The method of claim 3 , wherein the recorded volume grating contains a rolled K-vector.5. The method of claim 1 , wherein the recorded volume grating contains a multiplexed grating.6. The method of claim 1 , wherein the master grating comprises three separate ...

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Номер записи: 92
12-08-2021 дата публикации

Methods and Apparatus for Compensating Image Distortion and Illumination Nonuniformity in a Waveguide

Номер: US20210247719A1
Автор: GRANT Alastair John, He Sihui, Popovich Milan Momcilo, Waldern Jonathan David
Принадлежит: DigiLens Inc.

Typical waveguides rely on total internal reflection between the outer surfaces of substrates, which can make them highly susceptible to beam misalignment caused by nonplanarity of the substrates. In the manufacturing of the glass sheets commonly used for substrates, ripples can occur during the stretching and drawing of glass as it emerges from a furnace. Although glass manufacturers try to minimize ripples using predictions from mathematical models, it is difficult to totally eradicate the problem from the glass manufacturing process. Typically, these beam misalignments manifest themselves as image distortions and non-uniformities in the output illumination from the waveguide. Many embodiments of the invention are directed toward optically efficient, low cost solutions to the problem of controlling output image quality in waveguides manufactured using commercially available substrate glass and to the problem of compensating the image distortions and non-uniformity of curved waveguides. 1. A waveguide comprising:a first substrate having first and second surfaces with a surface relief characteristic along a first direction on at least one of the surfaces of the first substrate;a second substrate having first and second surfaces with a surface relief characteristic along a second direction on at least one of the surfaces of the second substrate; andat least one optical layer for modifying at least one of phase, amplitude, and propagation direction of light in contact with the second surface of the first substrate and the first surface of the second substrate, wherein the first and second substrates are configured to confine light to a total internal reflection path,wherein the optical layer comprises a Bragg grating configured as an input grating, a fold grating, or an output grating.2. The waveguide of claim 1 , wherein the surface relief characteristic of the first substrate comprises a one-dimensional cyclic function.3. The waveguide of claim 1 , wherein the ...

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Номер записи: 93
09-08-2018 дата публикации

Holographic media containing chain-substituted cyanine dyes

Номер: US20180223100A1
Автор: Dennis Hönel, Friedrich-Karl Bruder, Horst Berneth, Serguei Kostromine, Thomas Fäcke, Thomas Rölle
Принадлежит: Covestro Deutschland AG

The present invention relates to a photopolymer composition comprising a photopolymerizable component and a photoinitiator system comprising a chain-substituted cyanine dye. The invention further provides a photopolymer comprising a photopolymer composition according to the invention, a holographic medium comprising a photopolymer according to the invention, the use of a holographic medium according to the invention, and a process for producing a holographic medium by using the photopolymer according to the invention and the exposure of the corresponding holographic medium with the aid of pulsed laser radiation.

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Номер записи: 94
16-07-2020 дата публикации

Optical Elements and Methods of Making the Same

Номер: US20200227085A1
Автор: Bodiya Timothy Paul, Mills Jackie Lynn, Potnis Shreyas
Принадлежит:

There are provided holographic optical elements (HOEs) and methods of making the same. An example of such methods includes recording a first hologram in a contiguous holographic recording medium of the HOE. The first hologram may receive a beam of light and direct at least a portion of the beam into a light guide to form an incoupled beam. The method also includes recording a second hologram in the contiguous holographic recording medium. The second hologram may receive at least a portion of the incoupled beam and direct the portion of the incoupled beam out of the light guide to form an outcoupled beam. In addition, the method includes affixing the holographic recording medium to the light guide. 1. A method of making a holographic optical element (HOE) , the method comprising:recording a first hologram in a contiguous holographic recording medium of the HOE, the first hologram to receive a beam of light and to direct at least a portion of the beam into a light guide to form an incoupled beam;recording a second hologram in the contiguous holographic recording medium, the second hologram to receive at least a portion of the incoupled beam and to direct the portion of the incoupled beam out of the light guide to form an outcoupled beam; andaffixing the holographic recording medium to the light guide.2. The method of claim 1 , further comprising:recording a third hologram in the holographic recording medium, the third hologram to receive the incoupled beam and split the incoupled beam into a plurality of offspring beams to be received by the second hologram.3. The method of claim 2 , wherein:the third hologram is an exit pupil expander; andthe recording the third hologram comprises forming the exit pupil expander in the holographic recording medium.4. The method of claim 1 , wherein:the affixing the holographic recording medium to the light guide comprises, affixing the holographic recording medium on the light guide before the recording the first hologram and the ...

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Номер записи: 95
23-07-2020 дата публикации

OPTICAL ARTICLE WITH A HOLOGRAPHIC WAVEGUIDE

Номер: US20200233128A1
Автор: Biver Claudine, BOUCHIER Aude
Принадлежит: Essilor International

An optical article including a substrate, and a holographic waveguide covering at least part of the substrate and including two main surfaces, at least one of them conforming to a surface of the substrate, and at least first and second zones that are configured so that light incoming on one of the first and second zones is at least partially guided towards the other of the first and second zones. 1. An optical article comprising at least:a substrate, and two main surfaces, at least one of them conforming to a surface of the substrate, and', 'at least first and second zones that are configured so that light incoming on one of the first and second zones is at least partially guided towards the other of said first and second zones., 'a holographic waveguide covering at least part of the substrate and comprising2. The optical article according to wherein:the holographic waveguide further comprises one peripheral edge,the first zone comprises at least a portion of the peripheral edge of the holographic waveguide, andthe second zone comprises at least a portion of one of the main surfaces of the holographic waveguide.3. The optical article according to claim 1 , wherein the holographic waveguide extends over at least 10% of the surface of the substrate claim 1 , preferably over at least 50% of said surface claim 1 , even more preferably over at least 70% of said surface and even more preferably over the whole surface of the substrate.4. The optical article according to claim 1 , wherein the optical article comprises a plurality of holographic waveguides.5. The optical article according to claim 4 , wherein each holographic waveguide is configured to selectively propagate respectively different wavelengths of light between its respective first and second zones.6. The optical article according to claim 4 , wherein rays of light propagated by each holographic waveguide come in or come out from the waveguide's respective second zone according to different angles relative to ...

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Номер записи: 96
01-09-2016 дата публикации

Photopolymer formulation for production of holographic media comprising borates with low tg

Номер: US20160252808A1
Автор: Dennis Hönel, Friedrich-Karl Bruder, Günther Walze, Horst Berneth, Marc-Stephan Weiser, Rainer Hagen, Thomas Fäcke, Thomas Rölle
Принадлежит: Covestro Deutschland AG

The invention relates to a photopolymer formulation comprising a component reactive toward isocyanates, a polyisocyanate component, a writing monomer and a photoinitiator containing at least one dye and a coinitiator, characterized in that the coinitiator contains at least one substance of the formula (Ia) The invention further provides a process for preparing the specific coinitiators and the coinitiators obtainable by this process, and additionally a process for producing a holographic medium using the specific coinitiators, and a holographic medium obtainable using the inventive photopolymer formulation. The invention further relates to a laminate structure comprising an inventive holographic medium and likewise specific borates suitable as coinitiators.

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Номер записи: 97
17-09-2015 дата публикации

Method for selecting photoinitiator systems

Номер: US20150261938A1
Автор: Christian Diedrich, Dennis Hönel, Friedrich-Karl Bruder, Horst Berneth, Marc-Stephan Weiser, Thomas Fäcke, Thomas Rölle
Принадлежит: BAYER MATERIALSCIENCE AG

The invention relates to a method of selecting photoinitiator systems comprising at least one sensitizer and at least one coinitiator, for photopolymer formulations for producing holographic media.

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Номер записи: 98
30-07-2020 дата публикации

PLASTIC FILM HAVING A UV-CURING ADHESIVE LAYER, FOR THE PROTECTION OF A HOLOGRAM IN A PHOTOPOLYMER FILM COMPOSITE

Номер: US20200241471A1
Автор: Fäcke Thomas, Kostromine Serguei, Orselli Enrico, Rölle Thomas
Принадлежит:

The invention relates to a sealed holographic medium comprising a layer construction containing a photopolymer layer and a sealing layer, to a process for producing the sealed holographic medium, to a kit of parts, to a layer construction for sealing and to the use thereof. 116.-. (canceled)17. A sealed holographic medium comprising a layer construction B′-C′-D , whereinB′ is a photopolymer layer containing a hologram, obtained from an unirradiated photopolymer B comprisingI) matrix polymers,II) writing monomers,III) photoinitiators,IV) optionally at least one non-photopolymerizable component,V) optionally catalysts, free-radical stabilizers, solvents, additives and other assistant and/or added substances,wherein the photopolymer layer B′ is at least partly joined to the layer C′,C′ is an at least partly actinic-radiation-cured areal layer obtainable from a curable layer C comprisingI) at least one multifunctional acrylate,II) at least one photoinitiator andIII) optionally assistant and added substances andD is an areal substrate layer at least partly joined to layer C′,wherein all multifunctional acrylates of the curable layer C are identical to at least one writing monomer of the unirradiated photopolymer layer B.18. The sealed holographic medium according to claim 17 , wherein the photopolymer layer B′ is at least partly joined on one side to an areal substrate layer A claim 17 , wherein the layers are arranged directly atop one another in the sequence A-B′-C′-D claim 17 , wherein the substrate layer A is a transparent thermoplastic substrate layer or another carrier.19. The sealed holographic medium according to claim 17 , wherein the back of the photopolymer layer B′ is at least partly joined to a second at least partly actinic-radiation-cured layer C′ claim 17 , wherein the second layer C′ is on the other side at least partly joined to an areal substrate layer D claim 17 , wherein the layers are arranged directly atop one another in the sequence D-C′-B′-C′-D. ...

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Номер записи: 99
07-09-2017 дата публикации

IMAGE SENSING WITH A WAVEGUIDE DISPLAY

Номер: US20170255813A1
Автор: CHEN Liying, Cheng Yan
Принадлежит:

An electronic device includes an image sensing display. The display includes a cover glass and is configured as a waveguide. A volume holographic grating in the display diffracts incident light from an object positioned outside the display. The diffracted incident light has an angle of incidence relative to the volume holographic grating that satisfies the Bragg condition. The volume holographic grating diffracts the incident light through the waveguide at a predetermined angle and with a predetermined waveguide exit distance to focus at the image sensor. An image sensor is positioned at an output of the waveguide to capture the diffracted incident light propagated through the waveguide. Image processing circuitry is coupled to the image sensor to recognize a fingerprint image captured by the image sensor through the waveguide. 1. An imaging system comprising:a display configured as a waveguide, the display including a cover glass and a volume holographic grating configured to diffract incident light from an object positioned outside the display, the diffracted incident light having an angle of incidence relative to the volume holographic grating that satisfies the Bragg condition, the volume holographic grating diffracting the incident light through the waveguide at a predetermined angle.2. The imaging system of further comprising:an image sensor positioned at an output of the waveguide to capture the diffracted incident light propagated through the waveguide.3. The imaging system of wherein the display further includes a transparent or translucent substrate adjacent to the volume holographic grating.4. The imaging system of wherein the volume holographic grating selectively diffracts incident light having a normal angle of incidence with the volume holographic grating for transmission through the waveguide.5. The imaging system of wherein the volume holographic grating selectively diffracts incident light converging to the volume holographic grating for ...

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Номер записи: 100