Patents Examined by Audrey Y. Chang
  • Patent number: 11614567
    Abstract: The present invention relates to a low refractive layer and an anti-reflective film comprising the same. The low refractive layer can exhibit excellent optical properties such as a low reflectance and a high light transmittance, and excellent mechanical properties such as high wear resistance and scratch resistance at the same time, without adversely affecting the color of the polymer resin forming the low refractive layer. In particular, due to the excellent alkali resistance, the low refractive layer can maintain excellent physical properties even after alkali treatment. Therefore, when introducing a low refractive layer to the display device, it is expected that the production process can be simplified and further the production rate and the productivity can significantly increase.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 28, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Boo Kyung Kim, Yeong Rae Chang, Seok Hoon Jang, Eun Kyu Her, Jin Seok Byun
  • Patent number: 11586041
    Abstract: A diffractive optical element exerts a diffractive action on a display light that is emitted from a display unit. A folding mirror is provided on the opposite side of the diffractive optical element from the display unit to reflect the display light. The diffractive optical element includes a transmissive action part and a diffractive and reflective action part. The transmissive action part exerts a transmissive action to transmit therethrough the display light, which is incident from the display unit and is in a first polarization state, toward the folding mirror. The diffractive and reflective action part exerts a diffractive and reflective action to diffract and reflect the display light, which is reflected by the folding mirror and is in a second polarization state opposite to the first polarization state, toward the projection portion on an optical path.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: February 21, 2023
    Inventors: Hiroshi Ando, Kazuhisa Onda
  • Patent number: 11585971
    Abstract: Shaped glasses have curved surface lenses with spectrally complementary filters disposed thereon. The filters curved surface lenses are configured to compensate for wavelength shifts occurring due to viewing angles and other sources. Complementary images are projected for viewing through projection filters having passbands that pre-shift to compensate for subsequent wavelength shifts. At least one filter may have more than 3 primary passbands. For example, two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional passbands may be utilized to more closely match a color space and white point of a projector in which the filters are used. The shaped glasses and projection filters together may be utilized as a system for projecting and viewing 3D images.
    Type: Grant
    Filed: October 8, 2020
    Date of Patent: February 21, 2023
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Martin J. Richards, Wilson Allen, Gary D. Gomes
  • Patent number: 11567450
    Abstract: A quantum simulator includes a pseudo speckle pattern generator, a main vacuum chamber, an atomic gas supply unit, a light beam generator, a photodetector, and an atom number detector. The pseudo speckle pattern generator generates a pseudo speckle pattern in the inside of the main vacuum chamber by light allowed to enter the inside of the main vacuum chamber through the second window. The pseudo speckle pattern generator includes a controller, a light source, a beam expander, a spatial light modulator, and a lens. The controller sets a modulation distribution of the spatial light modulator based on a two-dimensional pseudo random number pattern.
    Type: Grant
    Filed: September 23, 2020
    Date of Patent: January 31, 2023
    Inventors: Hiroto Sakai, Kenji Ohmori, Taro Ando, Nobuyuki Takei, Haruyoshi Toyoda, Yoshiyuki Ohtake, Tomoko Hyodo, Yuu Takiguchi
  • Patent number: 11543774
    Abstract: Various examples of out-of-plane multicolor waveguide holography systems, methods of manufacture, and methods of use are described herein. In some examples, a multicolor waveguide holography system includes a planar waveguide to convey optical radiation between a grating coupler and a metasurface hologram. The grating coupler may be configured to couple out-of-plane optical radiation of three different color incident at three different angles into the planar waveguide. The combined multicolor optical radiation may be conveyed by the waveguide to the metasurface hologram. The metasurface hologram may diffractively decouple the three colors of optical radiation for off-plane propagation to form a multicolor holographic image in free space.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: January 3, 2023
    Assignee: Duke University
    Inventors: David R. Smith, Zhiqin Huang, Daniel L. Marks
  • Patent number: 11526007
    Abstract: An imaging system includes a light source configured to produce a plurality of spatially separated light beams. The system also includes an injection optical system configured to modify the plurality of beams, such that respective pupils formed by beams of the plurality exiting from the injection optical system are spatially separated from each other. The system further includes a light-guiding optical element having an in-coupling grating configured to admit a first beam of the plurality into the light-guiding optical element while excluding a second beam of the plurality from the light-guiding optical element, such that the first beam propagates by substantially total internal reflection through the light-guiding optical element.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: December 13, 2022
    Assignee: Magic Leap, Inc.
    Inventors: Michael Anthony Klug, Scott C. Cahall, Hyunsun Chung
  • Patent number: 11526020
    Abstract: A projector assembly includes three coaxially aligned lenses and an aperture stop. The three coaxially aligned lenses include a first lens and, in order of increasing distance therefrom and on a same side thereof, a second lens and a positive meniscus lens. The first lens is a positive lens. The second lens is a negative lens. The second lens is located between the aperture stop and the positive meniscus lens. The projector assembly is one-sided telecentric at a plane proximate the positive meniscus lens.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: December 13, 2022
    Assignee: OmniVision Technologies, Inc.
    Inventors: Tingyu Cheng, Jau-Jan Deng
  • Patent number: 11525949
    Abstract: An example article may include an optical filter and a multilayer stack adjacent the optical filter. The multilayer stack may include a plurality of layers. Each respective layer of the plurality layers may define a respective window edge of a plurality of window edges. The plurality of window edges may define an optical window configured to transmit light through the optical filter. At least a first respective window edge of the plurality of window edges may be stepped relative to at least a second respective window edge of the plurality of window edges.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: December 13, 2022
    Inventors: Guanglei Du, John A. Wheatley, Yihang Lv, Zhiyong Xu, Jingfei Chen
  • Patent number: 11520089
    Abstract: A diffractive optical element comprises a substrate, a first resin layer arranged on the substrate and a second resin layer arranged on the first resin layer. Each of the first resin layer and the second resin layer includes a grating section, or a layer portion, for forming a diffraction grating and a base section, or another layer portion, held in contact with the grating section. Either the first resin layer or the second resin layer has a lower transmittance portion in the base section thereof that shows an internal transmittance relative to a wavelength of 400 nm which is lower than that of the grating section of the resin layer by not less than 2% and not more than 6%.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: December 6, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuuta Tsuruki
  • Patent number: 11520141
    Abstract: Provided is an optical lens. The optical lens is provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are sequentially arranged from an object side to an image side along an optical axis. The first lens is a spherical lens having a negative focal power, the second lens is an aspheric lens having a meniscus shape bent towards an image surface, the third lens is an aspheric lens having a meniscus shape bent towards an object surface, the fourth lens is an aspheric lens having a positive focal power, the fifth lens is an aspheric lens having a positive focal power, the sixth lens is an aspheric lens having a negative focal power, and the seventh lens is an aspheric lens having a positive focal power.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: December 6, 2022
    Assignee: Dongguan Yutong Optical Technology Co., Ltd.
    Inventors: Shilong Mi, Zhanjun Zhang, Lei Zhang, Danyi Wang, Ni Han, Chuangbiao Liu
  • Patent number: 11520288
    Abstract: A method of producing a Computer Generated Hologram (CGH) for producing a 3 dimensional (3D) holographic image, including receiving data describing a 3D scene, producing a first CGH for producing a 2D image of the 3D scene as viewed from a specific viewing direction, the 2D image perpendicular to the viewing direction, decomposing the 2D image to a plurality of slices at different depths along the viewing direction, adjusting the first CGH by making, for at least one of the plurality of slices, a correction to the CGH associated with a depth of the slice along the viewing direction, thereby producing a corrected CGH for producing a 3D holographic image of the 3D scene. Related apparatus and methods are also described.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: December 6, 2022
    Assignee: Real View Imaging Ltd.
    Inventors: Shlomo Alon-Braitbart, Carmel Rotschild, Shaul Alexander Gelman
  • Patent number: 11513268
    Abstract: The invention concerns a method of manufacturing a modulated optically diffractive grating and a corresponding grating. The method comprises providing a substrate and manufacturing a plurality of temporary elements onto the substrate, the temporary elements being arranged in a periodic pattern comprising at least two periods having different element characteristics. Next, a first deposition layer is deposited so as to at least partially cover the temporary elements with the first deposition layer and the temporary elements are removed from the substrate in order to form onto the substrate a modulated diffractive grating of first grating elements made of the first deposition layer, the pattern comprising within each period a plurality of first grating elements and one more gaps between the first grating elements. The invention allows for producing high-quality gratings with locally varying diffraction efficiency.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: November 29, 2022
    Assignee: Dispelix Oy
    Inventors: Jussi Rahomäki, Ismo Vartiainen
  • Patent number: 11491814
    Abstract: A prism layer has an uneven surface that includes at least one display region. An interface layer is adjacent to the uneven surface. The interface layer has a difference in refractive index from the prism layer such that a refractive index of a side of an interface between the uneven surface and the interface layer at which the prism layer is located is higher than a refractive index of a side of the interface at which the light interference layer is located. The display region includes inclination elements. The inclination elements adjacent to each other in an array direction contact each other in a plan view facing a plane along which the prism layer expands. The inclination elements include first inclination elements among which the inclination angle increases by the even angles along the array direction.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: November 8, 2022
    Inventor: Shizuka Yamada
  • Patent number: 11480918
    Abstract: Disclosed are an active complex spatial light modulation method and apparatus for an ultra-low noise holographic display. The active complex spatial light modulation apparatus includes a substrate and a petal antenna including three petal patterns arranged on the substrate, dividing a complex plane into three phase sections, and modulating the input light into three-phase amplitude values corresponding to the phase sections. The petal antenna may have a point symmetry shape based on the center point of the petal antenna.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: October 25, 2022
    Inventor: Hwi Kim
  • Patent number: 11467391
    Abstract: A holographic sight comprises a unitary optical component carrier. The unitary optical component carrier may comprise a body with a first receptacle configured to receive a laser diode, a second receptacle configured to receive a mirror, a third receptacle configured to receive a collimating optic, a fourth receptacle configured to receive a grating, and a fifth receptacle configured to receive an image hologram. A laser diode may be received within opposing walls formed by the first receptacle. A mirror may be received in, and abut one or more surfaces of the second receptacle. A collimating optic may be received in, and abut one or more surfaces of the third receptacle. A grating may be received in, and abut one or more surfaces of the fourth receptacle. A hologram image may be received in, and abut one or more surfaces of the fifth receptacle.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: October 11, 2022
    Assignee: EOTech, LLC
    Inventors: Anthony Heath, Deanna Kay McMillen, James Olson
  • Patent number: 11460808
    Abstract: A method for generating video holograms in real time for a holographic playback device comprising at least one light modulator means, into which a scene divided into object points is encoded as an entire hologram and can be seen as a reconstruction from a visibility region, which is located within a periodicity interval of the reconstruction of the video hologram, the visibility region defining a subhologram together with each object point of the scene to be reconstructed, and the entire hologram being generated from a superposition of contributions of subholograms, is characterized in that for each object point the contributions of the subholograms in the entire reconstruction of the scene can be determined from at least one look-up table.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: October 4, 2022
    Inventors: Enrico Zschau, Armin Schwerdtner, Bo Kroll, Alexander Schwerdtner
  • Patent number: 11448936
    Abstract: The present invention relates to a nanostructure having an electrochromic material attached to the surface thereof, and a preparation method therefor. To this end, the present invention provides: a nanostructure comprising a metal oxide and having a structure comprising nanopores; and an electrochromic structure comprising an electrochromic material to be attached to the surface of the nanostructure. According to the present invention, the nanostructure has a surface area larger than that of conventional nanoparticles so as to enable more electrochromic materials to be attached thereto, and thus the electrochromic characteristics of an electrochromic device can be improved.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: September 20, 2022
    Inventors: Koun Park, Sangmo Koo
  • Patent number: 11442285
    Abstract: A diffractive optical element for a structured light projection module and a method of using the diffractive optical element are described herein. The diffractive optical element is configured to: receive two-dimensional patterned beams and generate multi-order diffractive beams, wherein the two-dimensional patterned beams are emitted from a structured light projection module, the structured light projection module includes a light source comprising a plurality of sub-light sources arranged in a two-dimensional array, and the two-dimensional patterned beams correspond to the two-dimensional array; and project a plurality of two-dimensional patterned beams, wherein each of the plurality of two-dimensional patterned beams creates a corresponding duplicated pattern, and the duplicated patterns form a speckle pattern having uniform speckle density. The two-dimensional patterned beams can overlap with each other, or not overlap with each other.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: September 13, 2022
    Assignee: Orbbec Inc.
    Inventors: Xing Xu, Xu Chen
  • Patent number: 11435585
    Abstract: An optical device having suppressed rainbow effect is provided. The optical device includes a light source configured to generate an image light, an optical combiner coupled with the light source and configured to direct the image light to an eye-box of the optical device, and a dimming element disposed at the optical combiner. The optical combiner includes at least one diffractive element. The optical combiner has a first side facing the eye-box and an opposing second side facing a real world, and the dimming element is disposed at the second side of the optical combiner. The dimming element is configured to receive a light from the real world and significantly attenuate an intensity of the light having an incidence angle in a predetermined range.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: September 6, 2022
    Inventors: Oleg Yaroshchuk, Barry David Silverstein, Alireza Moheghi, Gang Li
  • Patent number: 11415803
    Abstract: A method of generating a virtual image, including directing a light beam to a first side of an eyepiece, including transmitting the light beam into a first waveguide of the eyepiece; deflecting, by first diffractive elements of the first waveguide, a first portion of the light beam towards a second waveguide of the eyepiece, the first portion of the light beam associated with a first phase of light; deflecting, by protrusions on the first side of the eyepiece, a second portion of the light beam towards the second waveguide, the second portion of the light beam associated with a second phase of light differing from the first phase; and deflecting, by second diffractive elements of the second waveguide, some of the first and the second portions of the light beam to provide an exiting light beam associated with the virtual image that is based on the first and second phases.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: August 16, 2022
    Assignee: Molecular Imprints, Inc.
    Inventors: Kang Luo, Vikramjit Singh, Frank Y. Xu