Using A Hologram As An Optical Element Patents (Class 359/15)
  • Patent number: 11402647
    Abstract: A method includes projecting a single color illumination light having a first color on a liquid crystal on silicon display device, thereby obtaining a single color image light having the first color from the liquid crystal on silicon display device. The method also includes receiving image light having at least a second color that is different from the first color from a display panel that is different from a liquid crystal on silicon display device and combining the single color image light and the image light for projection toward an eye.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: August 2, 2022
    Assignee: FACEBOOK TEHCNOLOGIES, LLC
    Inventor: Jacques Gollier
  • Patent number: 11397406
    Abstract: The invention relates to a method for generating holograms for encoding in a spatial light modulation device for a holographic display for representing a two- and/or three-dimensional scene. The two- and/or three-dimensional scene is decomposed into object points and encoded in a hologram, which is subdivided into subholograms, in the spatial light modulation device. The object points of the scene are encoded into encoding regions on the spatial light modulation device. A size and/or shape of the encoding region is selected in relation to a size and/or shape of a subhologram, assigned to the encoding region, in such a way that crosstalk of higher diffraction orders in a virtual visibility region is reduced.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: July 26, 2022
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventors: Norbert Leister, Ralf Haussler, Gerald Futterer
  • Patent number: 11391951
    Abstract: An optical device includes a waveguide including an in-coupling optical element configured to in-couple light into the waveguide, a light distributing element configured to receive light from the in-coupling optical element and distribute light at a selected wavelength, and an out-coupling optical element configured to receive light from the light distributing element and out-couple light out of the waveguide. The out-coupling optical element includes a first region configured to out-couple light at a first depth plane based on a lens function of the first region and a second region configured to out-couple light at a second depth plane based on a different lens function of the second region.
    Type: Grant
    Filed: July 31, 2020
    Date of Patent: July 19, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Eric C. Browy, Jeffrey Scott Sommers
  • Patent number: 11378916
    Abstract: Disclosed are a holographic display method and a holographic display device. The holographic display method includes: acquiring an area of Nth diffraction order corresponding to an eye position; according to the area of Nth diffraction order, calculating a holographic complex amplitude distribution corresponding to a window of Nth diffraction order to obtain window hologram information, a function of the holographic complex amplitude distribution being expressed by C(m,n)=A(m,n)*exp[?i?(m,n)/N]; encoding the window hologram information; and according to the encoded window hologram information, loading the encoded window hologram information in the area of Nth diffraction order to display a hologram.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: July 5, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Bingchuan Shi
  • Patent number: 11366426
    Abstract: A three-dimensional light modulator, of which the pixels are combined to form modulation elements. Each modulation element can be coded with a preset discrete value such that three-dimensionally arranged object points can be holographically reconstructed. The light modulator is characterized in that assigned to the pixels of the modulator are beam splitters or beam combiners which, for each modulation element, combine the light wave parts modulated by the pixels by means of refraction or diffraction on the output side to form a common light beam which exits the modulation element in a set propagation direction.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: June 21, 2022
    Assignee: SEEREAL TECHNOLOGIES S.A.
    Inventors: Gerald Futterer, Norbert Leister, Ralf Haussler, Grigory Lazarev
  • Patent number: 11366253
    Abstract: Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically pointing and focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplates of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution. The diffractive waveplate lens and mirror systems are applicable to optical communication systems.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: June 21, 2022
    Assignees: Beam Engineering for Advanced Measurements Co., U.S. Government as Represented by the Secretary of the Army
    Inventors: Nelson V. Tabirian, Svetlana Serak, Olena Uskova, David E. Roberts, Anna Tabirian, Diane Steeves, Brian Kimball
  • Patent number: 11360430
    Abstract: Methods, apparatus, devices, and systems for reconstructing three-dimensional objects with display zero order light suppression are provided. In one aspect, a method includes illuminating a display with light at an incident angle, a portion of the light illuminating display elements of the display, modulating the display elements of the display with a hologram corresponding to holographic data to diffract the portion of the light to form a holographic scene corresponding to the holographic data, and redirecting display zero order light away from the holographic scene to suppress the display zero order light in the holographic scene. The display zero order light includes reflected light from the display.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: June 14, 2022
    Assignee: Pacific Light & Hologram, Inc.
    Inventors: Kamran Qaderi, Stephen John Hart, Robert Alan Hess, Jonathan Seamus Blackley
  • Patent number: 11360429
    Abstract: Methods, apparatus, devices, and systems for reconstructing three-dimensional objects with display zero order light suppression are provided. In one aspect, a method includes illuminating a display with light, a portion of the light illuminating display elements of the display, and modulating the display elements of the display with a hologram corresponding to holographic data to diffract the portion of the light to form a holographic scene corresponding to the holographic data, and to suppress display zero order light in the holographic scene. The display zero order light can include reflected light from the display.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: June 14, 2022
    Assignee: Pacific Light & Hologram, Inc.
    Inventors: Kamran Qaderi, Stephen John Hart, Robert Alan Hess, Jonathan Seamus Blackley
  • Patent number: 11347184
    Abstract: A method and an illumination arrangement for generating image effects in the interior of a motor vehicle or also outside the motor vehicle. To use existing installation space as efficiently as possible, light is radiated, in the form of at least a first optical reference wave field, onto a irradiation surface that is arranged laterally on an optical image storage device. In the optical image storage, which contains a holographic layer or a diffractive optical layer, the optical reference wave field is transformed into at least a first image wave field and is emitted on an emission side, at a first angular offset with respect to the irradiation surface.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: May 31, 2022
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Christian Studeny, Nils Pfullmann
  • Patent number: 11320578
    Abstract: A multiview display, system and method includes an array of light valves having a repeating plurality of color sub-pixels and arranged as a plurality of multiview pixels configured to modulate directional light beams as color pixels of views of a multiview image, and an array of multibeam emitters configured to provide the directional light beams. A location of a multiview pixel relative to a location of color sub-pixels is configured to be shifted as a function of a position of a user of the multiview display to provide dynamic color sub-pixel remapping.
    Type: Grant
    Filed: June 20, 2021
    Date of Patent: May 3, 2022
    Assignee: LEIA INC.
    Inventors: David A. Fattal, Daniel Geisler, Jr.
  • Patent number: 11287685
    Abstract: An object of the present invention is to provide an optical element capable of widening a field of view of an AR glass or the like; and an image display device using the optical element. The object is accomplished with an optical element including a light guide plate; a switching ?/2 plate capable of switching a phase difference between zero and ?/2; and a first optically anisotropic layer that is arranged between the light guide plate and the switching ?/2 plate, is formed using a composition including a liquid crystal compound, and has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the liquid crystal compound changes while continuously rotating along at least one in-plane direction of the first optically anisotropic layer.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: March 29, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Hiroshi Sato, Katsumi Sasata
  • Patent number: 11269123
    Abstract: Hollow optical elements that derive optical power from compound-curved reflective surfaces to produce a desired composite optical power. The reflective surfaces in combination with polarization control, can produce a triple-pass arrangement that determines the optical power. Two functional films, one or both of which are formed (e.g., thermoformed), can be joined at the perimeter to form units that are mechanically robust and therefore preserve optical performance under mechanical load. The air-spaced cavity formed between the two layers is free of birefringence concerns, where polarization control is crucial to contrast. These optical elements can be installed in frames or headsets to form lightweight wearable magnifiers, wide-angle collimators, tele-photo lenses, or for any application requiring optical power. They may be most appropriate for applications where light efficiency is not critical, such as well-lit environments, where the insertion-loss of 1 to 2 stops is not problematic.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: March 8, 2022
    Assignee: GARY SHARP INNOVATIONS, LLC
    Inventors: Gary D. Sharp, Anthony D. McGettigan
  • Patent number: 11269144
    Abstract: In one aspect, an optical device comprises a plurality of waveguides formed over one another and having formed thereon respective diffraction gratings, wherein the respective diffraction gratings are configured to diffract visible light incident thereon into respective waveguides, such that visible light diffracted into the respective waveguides propagates therewithin. The respective diffraction gratings are configured to diffract the visible light into the respective waveguides within respective field of views (FOVs) with respect to layer normal directions of the respective waveguides. The respective FOVs are such that the plurality of waveguides are configured to diffract the visible light within a combined FOV that is continuous and greater than each of the respective FOVs.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: March 8, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Chulwoo Oh, Vikraman Parthiban
  • Patent number: 11262163
    Abstract: A holographic weapon sight with a housing that has a viewing end and an opposing target end. The viewing path is defined from the viewing end to the target end. The sight has a light source that projects a light beam along a path. The sight also has a diffractive optical element (DOE) disposed in the path of the light beam, and the DOE reconstructs an image of a reticle. The sight includes a parabolic reflector that reflects the image of the reticle. The parabolic reflector may be disposed in the viewing path such that a user views a target along the viewing path through the parabolic reflector from the viewing end.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: March 1, 2022
    Assignee: Ziel Optics, Inc.
    Inventors: Kurt Douglas Mills, Fred Collin
  • Patent number: 11232729
    Abstract: A multiview display and method employ light valves configured to be driven according to a polarity inversion protocol along with multibeam emitters arranged in offset rows. The multiview display includes an array of the multiview pixels comprising the light valves and a multibeam backlight having a plurality of the multibeam emitters arranged in the offset rows. A method of multiview display operation includes emitting directional light beams using an array of multibeam elements in offset rows and modulating the directional light beams using an array of light valves to display an image. Sets of light valves of the light valve array correspond to multiview pixels of the multiview display and the light valve array is driven according to a polarity inversion protocol. In both the multiview display and the method, adjacent offset rows are offset by a distance between repeating polarities of the plurality inversion protocol in a row direction.
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: January 25, 2022
    Assignee: LEIA INC.
    Inventor: David A. Fattal
  • Patent number: 11215829
    Abstract: An augmented reality headset may include a reflective holographic combiner to direct light from a light engine into a user's eye while also transmitting light from the environment. The combiner and engine may be arranged to project light fields with different fields of view and resolution to match the visual acuity of the eye. The combiner may be recorded with a series of point to point holograms; one projection point interacts with multiple holograms to project light onto multiple eye box points. The engine may include a laser diode array, a distribution waveguide, scanning mirrors, and layered waveguides that perform pupil expansion and that emit wide beams of light through foveal projection points and narrower beams of light through peripheral projection points. The light engine may include focusing elements to focus the beams such that, once reflected by the holographic combiner, the light is substantially collimated.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: January 4, 2022
    Assignee: Apple Inc.
    Inventors: Richard J. Topliss, Paul J. Gelsinger-Austin, Thomas M. Gregory, Richard H. Tsai, Alexander Shpunt
  • Patent number: 11209546
    Abstract: A lidar-based apparatus and method are used for the solid state steering of laser beams using Photonic Integrated Circuits. Integrated optic design and fabrication micro- and nanotechnologies are used for the production of chip-scale optical splitters that distribute an optical signal from a laser essentially uniformly to an array of pixels, said pixels comprising tunable optical delay lines and optical antennas. Said antennas achieve out-of-plane coupling of light. As the delay lines of said antenna-containing pixels in said array are tuned, each antenna emits light of a specific phase to form a desired far-field radiation pattern through interference of these emissions. Said array serves the function of solid state optical phased array.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: December 28, 2021
    Assignee: Quanergy Systems, Inc.
    Inventors: Louay Eldada, Tianyue Yu, Angus Pacala
  • Patent number: 11193646
    Abstract: A lighting device for vehicles, in particular a signal light, with a light source for emitting a light beam and an optical unit associated with the light source for producing a predetermined light function, the optical unit having a holographic element and a lens arranged in the main emission direction in front of the holographic element, the holographic element comprising such a diffraction structure that the light beam emitted from the light source onto the holographic element is varied according to a predetermined illumination pattern such that the holographic light beam lights an illumination surface of the lens to generate the light function.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: December 7, 2021
    Assignees: Hella KGaA Hueck & Co., Covestro Deutschland AG
    Inventors: Martin Muegge, Carsten Hohmann, Rainer Hagen, Guenther Walze, Thomas Faecke
  • Patent number: 11187903
    Abstract: A light guide for an imaging apparatus for generating a virtual image from an initial image with at least two different initial image field regions is provided. The light guide includes an input coupling structure for coupling beams coming from the initial image into the light guide, and an extensive output coupling structure for coupling the beams that were coupled into the light guide out of the light guide. The extensive output coupling structure includes at least two partial faces. Each partial face is assigned to a different one of the initial image field regions and couples out the beams coming from the corresponding initial image field region. The partial faces of the output coupling structure are tilted about two non-parallel axes. The light guide can be part of an imaging apparatus, which can be used in particular in a head-mounted display.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: November 30, 2021
    Assignee: Carl Zeiss Jena GmbH
    Inventors: Hans-Juergen Dobschal, Karsten Lindig, Matthias Hillenbrand
  • Patent number: 11177900
    Abstract: An integrated wavelength division multiplexing (WDM) optical transceiver comprises the following elements: (1) a light source; (2) an array of photodiodes responsive to a plurality of optical signals and forming a plurality of electrical received information signals therefrom; and (3) a photonics integrated module (PIM) including transmission components and receiving components necessary to provide transceiver functionality. The transmission components include a demultiplexer, an electro-optic modulator array, and a multiplexer for combining a plurality of modulated optical signals onto a single output signal path as the transceiver output. The receiving components include a demultiplexer responsive to an incoming WDM signal for separating each wavelength component and creating a plurality of received optical signals.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: November 16, 2021
    Assignee: II-VI Delaware, Inc.
    Inventor: Giovanni Barbarossa
  • Patent number: 11122256
    Abstract: A mixed reality direct retinal projector system that may include a headset that uses a reflective holographic combiner to direct light from a light engine into an eye box corresponding to a user's eye. The light engine may include light sources coupled to projectors that independently project light to the holographic combiner from different projection points. The light sources may be in a unit separate from the headset that may be carried on a user's hip, or otherwise carried or worn separately from the headset. Each projector may include a collimating and focusing element, an active focusing element, and a two-axis scanning mirror to project light from a respective light source to the holographic combiner. The holographic combiner may be recorded with a series of point to point holograms; each projector interacts with multiple holograms to project light onto multiple locations in the eye box.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: September 14, 2021
    Assignee: Apple Inc.
    Inventors: Richard J. Topliss, Thomas M. Gregory, Paul J. Gelsinger-Austin, Richard H. Tsai
  • Patent number: 11112080
    Abstract: An illumination device includes a light diffusion device including element diffusion devices that diffuse incident light, a coherent light source that emits coherent light, a shaping optical system that shapes the coherent light, a scanner that adjusts a traveling direction of the coherent light so as to allow the coherent light to scan the light diffusion device, and a light condensing optical system located on a light path of the coherent light from the shaping optical system up to the light diffusion device. The light condensing optical system condenses the coherent light such that a spot area on the light diffusion device is smaller than the element diffusion device. Each element diffusion device diffuses the coherent light incident thereon so as to illuminate an element illumination area corresponding to the element diffusion device.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: September 7, 2021
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Makio Kurashige
  • Patent number: 11099522
    Abstract: According to one aspect, the invention concerns an optical imaging device (20) for an object (OBJ) by off-axis holography comprising a light source (21) adapted for emitting an illumination wave (EI) on the object, in transmission or reflection, and an assembly formed by one or more thick Bragg gratings (22) for receiving a wave (EO) coming from the object thus illuminated and for deflecting a first component (ER) of the wave coming from the object, called the reference wave, and to allow a second component (ES) of the wave coming from the object, called the signal wave, to pass without deflection in such a way that the deflected reference wave presents predetermined deflection angles with respect to the non-deflected signal wave defined in two perpendicular planes.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: August 24, 2021
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), ECOLE SUPÉRIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES, DE LA VILLE DE PARIS
    Inventors: Michael Atlan, Jean-Pierre Huignard
  • Patent number: 11099400
    Abstract: A beam propagation camera has at least one beam-splitting optical arrangement (240) configured to split a beam, which is incident on the beam-splitting optical arrangement along an optical axis (OA) of the beam propagation camera, into a multiplicity of sub-beams, and a sensor arrangement (250) configured to detect the sub-beams. The beam-splitting optical arrangement has a diffractive structure (241) configured such that at least two of the sub-beams are spatially separated from one another on the sensor arrangement and have respective foci longitudinally offset from one another along the optical axis.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: August 24, 2021
    Assignee: CARL ZEISS SMT GMBH
    Inventor: Matthias Manger
  • Patent number: 11079603
    Abstract: Illuminations systems that separate different colors into laterally displaced beams may be used to direct different color image content into an eyepiece for displaying images in the eye. Such an eyepiece may be used, for example, for an augmented reality head mounted display. Illumination systems may be provided that utilize one or more waveguides to direct light from a light source towards a spatial light modulator. Light from the spatial light modulator may be directed towards an eyepiece. Some aspects of the invention provide for light of different colors to be outcoupled at different angles from the one or more waveguides and directed along different beam paths.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: August 3, 2021
    Assignee: Magic Leap, Inc.
    Inventors: Hui-Chuan Cheng, Chulwoo Oh, Clinton Carlisle, Michael Anthony Klug, William J. Molteni, Jr.
  • Patent number: 11073693
    Abstract: In some embodiments, a head mounted display is provided, comprising a light guide, at least first and second diffraction gratings, alignment marks A1 and B1 associated with the first diffraction grating, and alignment marks A2 and B2 associated with the second diffraction grating. The first diffraction grating may be disposed on a first surface of the light guide, the first surface facing away from a light input. The second diffraction grating may be disposed on a second surface of the light guide, the second surface facing towards the light input. The second diffraction grating may be adapted to diffract at least some of the light input into the light guide, and the first diffraction grating may be adapted to diffract at least some light transmitted through the light guide back into the light guide.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: July 27, 2021
    Assignee: Sony Corporation
    Inventors: Katsuyuki Akutsu, Hideo Nagasaka, Yusuke Kajio, Takashi Mizusawa, Daisuke Tsukuda, Kazutatsu Tokuyama
  • Patent number: 11022748
    Abstract: Techniques are described for using confinement structures and/or pattern gratings to reduce or prevent the wicking of sealant polymer (e.g., glue) into the optically active areas of a multi-layered optical assembly. A multi-layered optical structure may include multiple layers of substrate imprinted with waveguide grating patterns. The multiple layers may be secured using an edge adhesive, such as a resin, epoxy, glue, and so forth. A confinement structure such as an edge pattern may be imprinted along the edge of each layer to control and confine the capillary flow of the edge adhesive and prevent the edge adhesive from wicking into the functional waveguide grating patterns of the layers. Moreover, the edge adhesive may be carbon doped or otherwise blackened to reduce the reflection of light off the edge back into the interior of the layer, thus improving the optical function of the assembly.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: June 1, 2021
    Assignee: Molecular Imprints, Inc.
    Inventors: Michael Nevin Miller, Frank Y. Xu, Vikramjit Singh, Eric C. Browy, Jason Schaefer, Robert D. TeKolste, Victor Kai Liu, Samarth Bhargava, Jeffrey Dean Schmulen, Brian T. Schowengerdt
  • Patent number: 10996385
    Abstract: There is provided a filter for filtering electromagnetic radiation, wherein said filter is arranged to transmit electromagnetic radiation of a first predetermined wavelength and to block transmission of electromagnetic radiation of a second, different predetermined wavelength; said filter comprising a first metamaterial. Optionally, the metamaterial may be formed of a plurality of material elements wherein each material element is at least one-dimensional and the size of the material element along each dimension is no greater than the size of the second predetermined wavelength. The filter comprises a second metamaterial arranged to provide second filtering of electromagnetic radiation.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 4, 2021
    Assignee: Lamda Guard Technologies Ltd.
    Inventors: George Palikaras, Themos Kallos
  • Patent number: 10996476
    Abstract: An optical device with reduced see-through diffraction artifacts for Augmented Reality (AR) applications is provided. The device includes a projector configured to generate an image light and a waveguide optically coupled with the projector and configured to guide the image light to an eye-box. The waveguide includes an in-coupling element configured to couple the image light into the waveguide, and an out-coupling element configured to decouple the image light out of the waveguide. The waveguide includes at least one switchable grating configured to: during a virtual-world subframe of a display frame, decouple the image light out of the waveguide via diffraction, and during a real-world subframe of the display frame, transmit a light from a real-world environment to the eye-box with a diffraction efficiency less than a predetermined threshold.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: May 4, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Andrew Maimone, Oleg Yaroshchuk
  • Patent number: 10989854
    Abstract: The present application relates to a polarization conversion element and an optical isolation device. The present application provides a polarization conversion element capable of converting unpolarized incident light into one polarized light and an optical isolation device with an excellent optical isolation ratio comprising the polarization conversion element. Such an optical isolation device can be applied to various applications such as the field of optical communication or laser optics, the field of security or privacy protection, brightness enhancement of displays, or a use for hiding and covering.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: April 27, 2021
    Inventors: Seong Min Park, Sang Choll Han, Min Soo Song
  • Patent number: 10983389
    Abstract: The present disclosure generally relates to systems and methods for manufacturing wire grid polarizers for LCDs using interference lithography, which are also useful for generating large-area grating patterns. In one embodiment, a method includes depositing a bottom anti-reflective coating layer over an aluminum coated flat panel display substrate, depositing a photoresist layer over the bottom anti-reflective coating layer, and exposing the photoresist layer with an image from a phase grating mask. The exposure with the phase grating mask is done by imaging the ±1 diffraction orders from the phase grating mask onto the substrate using a half Dyson optical system. A plurality of half Dyson systems are generally used in parallel to pattern fine geometry lines and spaces of a wire grid polarizer for a large area substrate. Each half Dyson system includes a primary mirror, a positive lens and a reticle.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: April 20, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: David Markle, Jang Fung Chen
  • Patent number: 10945607
    Abstract: This invention is to provide a spectroscope that can improve resolution and reduce loss of light intensity and/or distortion of a wave front while enabling detection of the optical spectrum for each of a plurality of polarization components in incident light. The spectroscope is a spectroscope that comprises a first diffraction grating 51 to which at least a transmitted light or a reflected light from an object to be measured enters, which diffracts a first polarization component of the incident light and which transmits a second polarization component that is different from the first polarization component of the incident light without diffraction, and a first light-receiving element 55 that receives a spectrum of the light diffracted by the first diffraction grating 51.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: March 16, 2021
    Assignee: HORIBA, LTD.
    Inventor: Seichi Sato
  • Patent number: 10943109
    Abstract: An electronic device is provided. The electronic device includes a light emitting unit configured to alternately emit light having a preset pattern to an eye area of a user; an inputter configured to receive a plurality of images which capture an eye area of the user; and a processor configured to detect a user's gaze using a first image that is captured at the time of irradiating a preset first pattern and a second image that is captured at the time of irradiating a preset second pattern, and the processor detects a user's gaze by extracting reflection points of each of the first image and the second image and using remaining reflection points excluding reflection points at a same position from among the extracted reflection points.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: March 9, 2021
    Assignees: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: Kang-won Jeon, Sung-Jea Ko, Tae-young Na, Mun-Cheon Kang, Kwang-Hyun Uhm
  • Patent number: 10935214
    Abstract: A light-emitting device includes pixels each including subpixels. Each subpixel includes light-emitting elements that emit respective pieces of light of colors different from each other, and a light-shielding film having openings at respective positions where the openings are opposed to the respective light-emitting elements at predetermined intervals. The openings have respective widths different from each other. The widths of the respective openings in a first direction and a second direction are sized to allow the light-shielding film to block a portion of the pieces of light emitted from the respective light-emitting elements and thereby to cause a 45-degree luminance viewing angle to be different between the first and second directions, and are sized to cause color differences (?u?v?) at a 45-degree chromaticity viewing angle (u?v?) in the first and second directions to be 0.020 or less. The 45-degree luminance viewing angle is expressed in a unit of cd/m2.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 2, 2021
    Assignee: JOLED INC.
    Inventor: Toshihiro Fukuda
  • Patent number: 10938480
    Abstract: A transceiver is disclosed. The transceiver includes a first unit capable of a full-duplex communication using an electromagnetic wave, and a second unit capable of a full-duplex communication using an electromagnetic wave. The first unit includes a transmitter and a receiver arranged in this order at a predetermined interval in a first direction. The second unit includes a receiver and a transmitter arranged in this order at a predetermined interval in the first direction. The second unit is placed adjacent to the first unit in a second direction perpendicular to the first direction.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: March 2, 2021
    Assignee: LENOVO (SINGAPORE) PTE LTD
    Inventors: Hirohide Komiyama, Masayuki Amano, Tabito Miyamoto, Masato Itoh
  • Patent number: 10914902
    Abstract: In various embodiments, a beam-parameter adjustment system and focusing system alters a spatial power distribution of a radiation beams before the beam is coupled into an optical fiber or delivered to a workpiece.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: February 9, 2021
    Assignee: TERADIODE, INC.
    Inventors: Parviz Tayebati, Wang-Long Zhou, Bien Chann, Bryan Lochman
  • Patent number: 10911742
    Abstract: An electronic device includes one or more processors and a display that is flexible. A louvered filter, which can be optionally configured in an electronic device attachment, as a first louvered filter and a second louvered filter, or otherwise, is then disposed along the flexible display. When the flexible display is deformed by one or more bends, the one or more processors can present a first image through a first portion of the louvered filter and a second image through a second portion of the louvered filter to present stereoscopic content without the need of special glasses.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: February 2, 2021
    Assignee: Motorola Mobility LLC
    Inventors: Mark Frederick Valentine, Adrian Gheorghe Manea, Sen Yang
  • Patent number: 10895743
    Abstract: The present invention relates to a display apparatus for superimposing a virtual image into the field of vision of a user of the display apparatus, having spectacles for the user and at least one projection device for producing light rays which are transferred by means of an optical unit of the spectacles into a beam path which produces a virtual image for the user. The optical unit may comprise a ground-glass screen or lens array and a holographic optical imaging unit. The ground-glass screen or lens array and holographic optical imaging unit are arranged in such a way that the light rays produced by the projection device are incident on the holographic optical imaging unit through the ground-glass screen or the lens array and are transferred by the holographic optical imaging unit into the beam path which produces the virtual image for the user.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: January 19, 2021
    Assignee: Hologram Industries Research GmbH
    Inventor: Günther Dausmann
  • Patent number: 10890778
    Abstract: An optical system includes a grating including at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range. The optical system also includes a polarizer configured to transmit the first light diffracted by the grating structure and block a second light reflected by a surface of the at least one substrate.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: January 12, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Yun-Han Lee, Mengfei Wang, Junren Wang, Lu Lu, Robin Sharma, Gregory Olegovic Andreev, Garam Young, Andrew John Ouderkirk, Babak Amirsolaimani, Fenglin Peng, Barry David Silverstein
  • Patent number: 10877280
    Abstract: A near-eye display includes a light source assembly, a first waveguide, an output waveguide, and a controller. The light source assembly emits image light including light within a first band and a second band. The first waveguide receives the image light, expands the received image light in at least one dimension, and outputs an image light. The output waveguide includes an output area and a plurality of input areas. Each input area receives the image light from the first waveguide. The output waveguide includes a holographic Bragg grating and the output waveguide expands the image light at least along two dimensions to form an expanded image light, and outputs the expanded image light toward an eyebox. The controller controls the scanning of the light source assembly and the first waveguide.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: December 29, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Hee Yoon Lee, Wanli Chi, Pasi Saarikko
  • Patent number: 10878209
    Abstract: A camera is provided that comprises an image sensor for detecting image data from a detection zone, an illumination unit having at least one light source for illuminating the detection zone, and a front screen. In this respect, a lateral deflection element is provided that is associated with the light source, that is arranged in the camera protected by the front screen, and that has a diffusely scattering surface or a reflective surface to generate a diffuse illumination or a dark field illumination in the detection zone.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: December 29, 2020
    Assignee: SICK AG
    Inventors: Florian Schneider, Thomas Pfrengle
  • Patent number: 10871649
    Abstract: An apparatus is disclosed for producing an optical display comprising an optical waveguide including a first diffractive part arranged to receive display light and to diffract the display light into an angle for guided propagation along the optical waveguide. A second diffractive part of the waveguide is optically coupled to the first diffractive part by the optical waveguide and is arranged to receive and to diffract light from the first diffractive part to an angle for output from the optical waveguide. Those external surfaces of the waveguide against which guided light reflects internally are coated with a meta-material having a refractive index of value less than 1.0 (one).
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: December 22, 2020
    Assignee: BAE SYSTEMS plc
    Inventor: Michael David Simmonds
  • Patent number: 10871601
    Abstract: Transmission and reflection mode VHOEs are designed and fabricated for use in imaging and other applications. These VHOE provide high diffraction efficiency with minimal chromatic aberrations and astigmatism across the bandwidth. The lens provides optical power within the bandwidth centered relative to several wavelengths to magnify (focus or collimate) input light and is transparent for the rest of the image spectrum. In transmission mode, two VHOE are fabricated in such a way as to introduce compensating adjustments that minimize the astigmatism and chromatic aberrations introduced by the bandwidth of the input light. Two VHOEs are required to provide an on-axis imaging system to magnify light to form an image and reduce the chromatic aberrations across the bandwidth and reduce the astigmatism while maintaining high diffraction efficiency (DE).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 22, 2020
    Assignee: TIPD, LLC
    Inventors: Arkady Bablumyan, Lloyd J. LaComb, Jr., Nasser N. Peyghambarian
  • Patent number: 10859833
    Abstract: A waveguide image combiner is used to transmit a monochrome or full-color image in an augmented reality display. The combiner uses multiple pairs of overlapping incoupling and outcoupling VHOEs to expand the horizontal FOV and a Y expander to expand the vertical FOV. This suitably provides an expanded horizontal and vertical FOV that offers a diagonal FOV?50°, a horizontal FOV?40 and a vertical FOV?25°. The combiner also delivers a large horizontal eye box up to 20 mm and a vertical eye box of 10 mm while maintaining high light efficiency of the real scene (e.g. >80%). The system is able to use a light engine based on broadband (10 nm????30 nm) LEDs and maintain a large horizontal field of view and high transmission of the real imagery. The approach resolves issues with current embodiments including astigmatism, image overlap, color balance, and small light engine pupils leading to reduced eye boxes.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: December 8, 2020
    Assignee: TIPD, LLC
    Inventor: Arkady Bablumyan
  • Patent number: 10852559
    Abstract: Provided are a light guide plate, a backlight unit, and a holographic display apparatus including the backlight unit. The backlight unit includes a light source and a light guide plate including two or more layers configured to guide light from the light source, wherein the two or more layers are configured to control a ratio of light transmitted therethrough to light reflected thereby.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: December 1, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chilsung Choi, Hoon Song, Jungkwuen An, Sunil Kim, Sunghoon Lee, Hongseok Lee
  • Patent number: 10845761
    Abstract: Examples are disclosed that relate to holographic near-eye display systems. One example provides a near-eye display device, comprising a diverging light source, an image producing dynamic digital hologram panel configured to receive light from the diverging light source and form an image. The near-eye display device also includes and a combiner comprising a holographic optical element positioned to receive light from the dynamic digital hologram panel and to redirect the light toward an eyebox, the holographic optical element being positioned between the eyebox and a view of an external environment to combine a view of the image formed by the dynamic digital hologram panel and the view of the external environment.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: November 24, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Andrew Maimone, Andreas Georgiou, Joel Steven Kollin
  • Patent number: 10845525
    Abstract: An imaging light guide for conveying a virtual image has a waveguide that conveys image-bearing light, formed as a flat plate having a front and a back surface and having an in-coupling diffractive optic on the front surface with a first grating vector diffracting an image-bearing light beam into the waveguide and directing diffracted light. An out-coupling diffractive optic is formed on the front or back surface as a diffractive array and with a first subset of diffractive elements, each having a second grating vector k2 offset from the first grating vector by about +60 degrees and a second subset of diffractive elements, each having a third grating vector k3 offset from the first grating vector by about ?60 degrees. Each diffractive element of the first subset is immediately adjacent to at least one diffractive element of the second subset and the diffractive elements are mutually non-overlapping.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: November 24, 2020
    Assignee: Vuzix Corporation
    Inventors: Robert J. Schultz, Paul J. Travers
  • Patent number: 10838121
    Abstract: A three-dimensional diffraction grating is generated by selective deposition and/or selective etching. The three-dimensional diffraction grating includes a substrate and a plurality of structures located at different positions on the substrate. The structures have different materials. Edges of at least some of the structures are aligned. The three-dimensional diffraction grating includes different materials and aligned edges in all three dimensions. With the different materials and aligned edges, the three-dimensional diffraction gratings is configured to eliminate display artifacts, such as ghost, rainbow, etc.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: November 17, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Nihar Ranjan Mohanty, Giuseppe Calafiore, Matthew E. Colburn, Austin Lane, Matthieu Charles Raoul Leibovici
  • Patent number: 10837617
    Abstract: The invention enables a desired projection pattern on a surface to be illuminated, and enables a projection position and/or a projection orientation of the projection pattern to be changed. A laser beam is shaped into a parallel light, and an incident surface of a diffraction optical element recording a hologram image is irradiated with the parallel light. A projection pattern of an arrow oriented in a predetermined direction is projected as a hologram reconstructed image on a surface to be illuminated. An optical-element drive unit rotates the diffraction optical element about a rotation axis in a rotation plane orthogonal to an optical axis of a parallel incident light. By means of the rotation, a geometric positional relationship of the diffraction optical element with respect to the surface to be illuminated is changed, whereby an orientation of the arrow projection pattern on the surface can be changed.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: November 17, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Makio Kurashige, Shumpei Nishio
  • Patent number: 10818215
    Abstract: The present disclosure provides a display panel and a display apparatus. The display panel includes: light-emitting elements which include a first light-emitting element that emits light of a first color having a wavelength ranging from ?1 to ?2, a second light-emitting element that emits light of a second color having a wavelength ranging from ?3 to ?4, and a third light-emitting element that emits light of a third color having a wavelength ranging from ?5 to ?6; and first to third capping layers respectively covering light-exiting sides of the first to third light-emitting elements. At least one of the first to third capping layers contains an ultraviolet light absorber that can absorb light having a wavelength ranging from 380 nm to 410 nm with an absorption rate greater than or equal to 20%.
    Type: Grant
    Filed: May 27, 2019
    Date of Patent: October 27, 2020
    Assignee: WuHan TianMa Micro-Electronics Co., Ltd.
    Inventors: Wei Gao, Ping An, Lei Zhang, Jinghua Niu, Wenpeng Dai, Mingzhi Dai