公开(公告)号：US20240337983A1

公开(公告)日：2024-10-10

申请号：US18682607

申请日：2022-08-11

申请人： Arizona Board of Regents on Behalf of the University of Arizona

发明人： Raymond Kostuk ,  Benjamin Chrysler ,  Jianbo Zhao

IPC分类号： G03H1/04 ,  G03H1/02

CPC分类号： G03H1/0486 ,  G03H1/0248 ,  G03H2001/0439 ,  G03H2001/0491 ,  G03H2240/53

摘要： Methods, devices and systems are described that enable monitoring the diffraction efficiency of holographic material in real-time while they are being formed. One example method includes directing a reference beam and an object beam toward a holographic material for formation of a diffraction grating and blocking one of the beams for at least a portion of time during which the diffraction grating is being formed. The method further includes, upon blockage of one of the beams, based on power level measurements, determining whether or not a first diffraction efficiency is reached. If the first diffraction efficiency is reached, one of the reference or the object beams is disabled or blocked while the other beam illuminates the holographic material with a particular duty cycle. Further measurements of the diffraction efficiency are made until the final diffraction efficiency is reached.

公开(公告)号：US12111615B2

公开(公告)日：2024-10-08

申请号：US17375609

申请日：2021-07-14

申请人： LIGHT FIELD LAB, INC.

发明人： Jonathan Sean Karafin ,  Brendan Elwood Bevensee

IPC分类号： G03H1/08 ,  G02B5/32 ,  G03H1/02 ,  G03H1/22

CPC分类号： G03H1/0866 ,  G02B5/32 ,  G03H1/0248 ,  G03H1/2202 ,  G03H2001/2228 ,  G03H2222/34 ,  G03H2223/14 ,  G03H2223/16 ,  G03H2223/23

摘要： Holographic and diffractive optical encoding techniques for forming reflection or transmission holograms. The encoding device includes a substrate having an interference pattern that can propagate light along a light propagation path from one side of the substrate to another side of the substrate. Furthermore, an optical element may be used to propagate light according to a four-dimensional light field coordinate system.

公开(公告)号：US20240329597A1

公开(公告)日：2024-10-03

申请号：US18194981

申请日：2023-04-03

申请人： BAE Systems Information and Electronic Systems Integration Inc.

发明人： Michael J. DeWeert ,  Reid A. Noguchi ,  Somit S. Mathur

IPC分类号： G03H1/22 ,  G03H1/00 ,  G03H1/02 ,  H04N23/20 ,  H04N23/61 ,  H04N23/695 ,  H04N23/698 ,  H04N23/90

CPC分类号： G03H1/2249 ,  G03H1/0005 ,  G03H1/02 ,  G03H1/2202 ,  H04N23/20 ,  H04N23/61 ,  H04N23/695 ,  H04N23/698 ,  H04N23/90 ,  G02B5/001 ,  G03H2001/0033 ,  G03H2001/0268 ,  G03H2001/2234 ,  G03H2001/2284 ,  G03H2222/12 ,  G03H2223/55

摘要： An optical detection system uses high-resolution holographic filters for target detection within a very-large field of view image acquired with a reflector. The holographic filter acts as an optical computer, mixing phase and amplitude information of known targets with light from the scene, automatically enhancing portions of the image that match threat objects or other object of interest. A lens forming a Fourier transform of the entire scene is used, and within that transform, the holographic information of a target or multiple targets is added. By acting as an inverse optical transfer function, the hologram gathers the target information to single point, and removes non-target background. Amplification is done by using a laser-illuminated hologram to create a phase-amplitude filter in a photorefractive material at the transform plane. By mixing the hologram and the scene at the transform plane, the matching is enhanced regardless of target location in the scene.

公开(公告)号：US20240319514A1

公开(公告)日：2024-09-26

申请号：US18189243

申请日：2023-03-24

申请人： AKMIRA OPTRONICS GMBH

发明人： Alexander KNÜTTEL

IPC分类号： G02B27/10 ,  G02B27/42 ,  G03H1/02 ,  H04N23/56

CPC分类号： G02B27/1086 ,  G02B27/1066 ,  G02B27/4205 ,  G03H1/0248 ,  H04N23/56 ,  G02B5/045 ,  G02B5/136

摘要： The invention relates to an optical imaging device. The device comprises at least one beam splitter element onto which object light emanating from an examination object is incident via an input aperture of the device and at which the object light is split into a first light component and into second light components which comprise a respective wavefront, a detection unit which is arranged behind the at least one beam splitter element in the direction of propagation of the object light, and an evaluation unit coupled to the detection unit, wherein the device is configured in a wavefront-inverting manner for inverting the wavefront of the first light component and/or the wavefront of the second light component wherein the first light component and the second light component are incident on the detection unit via at least one optical element, wherein the wavefronts of the first light component and of the second light component interfere at the detection unit depending on an inclination angle between the wavefronts to form a respective interference pattern, which inclination angle is characteristic of an angle which the object light comprises on the incidence side with respect to a defined direction of arrival on the at least one beam splitter element, and wherein the evaluation unit generates an image of the examination object based on the interference pattern.

公开(公告)号：US20240288825A1

公开(公告)日：2024-08-29

申请号：US18402931

申请日：2024-01-03

申请人： Unlocked Reality Inc.

发明人： Akash Bellippady

IPC分类号： G03H1/22 ,  G03H1/00 ,  G03H1/02

CPC分类号： G03H1/22 ,  G03H2001/0088 ,  G03H2001/0216

摘要： A holographic media display device with an exterior, including multiple light-emitting displays that each configured to output images, at least one semi-transparent reflector, each reflector configured to receive images from at least one of the displays, to create a hologram display proximate the reflector, control electronics configured to store image media and transmit the image media to the light-emitting displays, and exterior user controls.

公开(公告)号：US12071515B2

公开(公告)日：2024-08-27

申请号：US16972884

申请日：2019-06-10

申请人： THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE

发明人： Marvin D. Alim ,  Christopher N. Bowman ,  Sudheendran Mavila ,  Robert R. McLeod

IPC分类号： C08G75/02 ,  C08F2/50 ,  C08F20/38 ,  C08F28/04 ,  G02B5/32 ,  G03F7/004 ,  G03H1/02 ,  G03F7/00

CPC分类号： C08G75/02 ,  C08F2/50 ,  C08F20/38 ,  C08F28/04 ,  G02B5/32 ,  G03F7/004 ,  G03F7/001 ,  G03H1/024 ,  G03H2260/12

摘要： The present invention, in one aspect, relates to monomers and photopolymers that exhibit a high refractive index. The photopolymers of the invention have properties suitable for fabricating holographic optical elements (HOEs).

公开(公告)号：US20240280521A1

公开(公告)日：2024-08-22

申请号：US18571410

申请日：2022-06-09

申请人： Ori Lieberman

发明人： Ori Lieberman

IPC分类号： G01N23/2251 ,  G03H1/00 ,  G03H1/02

CPC分类号： G01N23/2251 ,  G03H1/0011 ,  G03H1/0244 ,  G01N2223/102 ,  G01N2223/418 ,  G01N2223/611

摘要： An article comprising a crystalized resin material, the material having microscopic surface reliefs in a surface thereof, wherein the surface reliefs form optical structures which generate an optical image and or holographic information, the crystalized resin material is a cannabis derived resin and the microscopic surface reliefs formed in the resin form optical structures which generate an optical image or optical information.

公开(公告)号：US12066648B2

公开(公告)日：2024-08-20

申请号：US17322354

申请日：2021-05-17

申请人： Meta Platforms Technologies, LLC

发明人： Lu Lu ,  Hsien-Hui Cheng ,  Junren Wang ,  Mengfei Wang

IPC分类号： G02B5/30 ,  G02B5/32 ,  G03H1/02

CPC分类号： G02B5/3083 ,  G02B5/32 ,  G03H1/0248 ,  G03H2223/20

摘要： A device is provided. The device includes a first polarization hologram element configured to operate as a half-wave plate for a first light having a first wavelength, and as a full-wave plate for a second light having a second wavelength. The device also includes a second polarization hologram element stacked with the first polarization hologram, and configured to operate as the half-wave plate for the second light and as the full-wave plate for the first light. The first polarization hologram element is configured to forwardly diffract or transmit the first light depending on a handedness of the first light. The second polarization hologram element is configured to forwardly diffract or transmit the second light depending on a handedness of the second light.

公开(公告)号：US12038721B2

公开(公告)日：2024-07-16

申请号：US17387369

申请日：2021-07-28

申请人： GOOGLE LLC

发明人： Robin W. Tsen

IPC分类号： G03H1/02 ,  G02B27/01 ,  G03H1/26

CPC分类号： G03H1/26 ,  G02B27/0172 ,  G03H1/02 ,  G03H1/0236 ,  G03H1/2645 ,  G02B2027/0174 ,  G02B2027/0178 ,  G03H2001/0212 ,  G03H2001/026 ,  G03H2001/266 ,  G03H2222/13

摘要： Systems, devices, and methods for side lobe control in holograms are described. The magnitude of the side lobes of a hologram depends on the distribution of refractive index modulation (Δn), therefore control of side lobe magnitude may be achieved by controlling the distribution of Δn. The distribution of Δn may be controlled by replicating a hologram from a master with two reference beams, where the wavelength and angle of each reference beam, the playback angle of the master hologram, and the thickness of the master hologram, the copy holographic recording medium (HRM), and the recording substrate are carefully chosen to achieve a pattern of meta-interference within the HRM that matches the desired distribution of Δn.

公开(公告)号：US12032158B2

公开(公告)日：2024-07-09

申请号：US17097291

申请日：2020-11-13

申请人： Dualitas Ltd

发明人： Mikael Collin

IPC分类号： G02B27/01 ,  G02B27/09 ,  G03H1/02 ,  G03H1/08 ,  G03H1/22 ,  G06F7/552

CPC分类号： G02B27/0101 ,  G02B27/0961 ,  G03H1/0808 ,  G06F7/552 ,  G03H2001/0224 ,  G03H2001/0816 ,  G03H2001/0825 ,  G03H1/2294

摘要： A logic circuit comprises a logic sub-circuit arranged to output a stream, S1, of Fresnel lens values, F(x), of a Fresnel lens for display on [m×n] pixels of a pixelated display device, and an iterative method outputs a stream, S1, of Fresnel lens values, F(x), of a Fresnel lens for display on [m×n] pixels of a pixelated display device. The circuit and method can reduce the number of multiplications used to provide each value of a stream of display values for the display device, wherein the display values include values of a Fresnel lens function. Accordingly, they can be implemented in an advanced integrated circuit, such as a field-programmable gate array.