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    REFLECTIVE DIFFUSION DEVICE AND PROJECTION DEVICE
    31.
    发明公开
    REFLECTIVE DIFFUSION DEVICE AND PROJECTION DEVICE 审中-公开

    公开(公告)号：US20240077793A1

    公开(公告)日：2024-03-07

    申请号：US18358036

    申请日：2023-07-25

    申请人： Coretronic Corporation

    发明人： Pi-Tsung Hsu

    IPC分类号： G03B21/14 ,  G02B5/02 ,  G03B21/20

    CPC分类号： G03B21/142 ,  G02B5/0284 ,  G03B21/204 ,  G03B21/2066

    摘要： A reflective diffusion device including a reflecting member and a diffusing member is provided, which are adapted for reflecting and diffusing an excitation light beam emitted from a light source module. The reflecting member has a central axis and includes a reflective surface facing the light source module. The diffusing member is disposed on a portion of the reflective surface of the reflecting member. The excitation light beam is incident on a first position of the reflective diffusion device in an incident direction parallel to the central axis, is reflected by the reflective surface and transmitted to a second position of the reflective diffusion device, and is then reflected by the reflective surface to maintain the excitation light beam or form a diffused light beam. The excitation light beam or the diffused light beam exits from the reflective diffusion device in an exit direction parallel to the central axis.

    METHOD OF MANUFACTURING OPTICAL MEMBER
    32.
    发明公开
    METHOD OF MANUFACTURING OPTICAL MEMBER 审中-公开

    公开(公告)号：US20240061159A1

    公开(公告)日：2024-02-22

    申请号：US18446592

    申请日：2023-08-09

    申请人： NICHIA CORPORATION

    发明人： Takaaki TADA

    IPC分类号： G02B5/02

    CPC分类号： G02B5/0268 ,  G02B5/0231 ,  G02B5/0221

    摘要： A method of manufacturing an optical member includes forming a first layer on a light transmissive substrate by atomic layer deposition, converting a surface layer of the first layer into a boehmite layer, and forming a second layer by atomic layer deposition so as to cover the boehmite layer. The first layer includes aluminum oxide and has a first thickness. The second layer has a second thickness less than the first thickness.

    Light homogenizing element
    35.
    发明授权
    Light homogenizing element 有权

    公开(公告)号：US11899196B2

    公开(公告)日：2024-02-13

    申请号：US17700509

    申请日：2022-03-22

    申请人： Coretronic Corporation

    发明人： Fu-Ming Chuang ,  Hung-Ta Chien

    IPC分类号： G02B26/08 ,  G02B5/02 ,  G02B26/00 ,  G02B27/30 ,  H10N30/80 ,  H10N30/20

    CPC分类号： G02B26/08 ,  G02B5/0278 ,  G02B26/004 ,  G02B27/30 ,  H10N30/2042 ,  H10N30/802

    摘要： A light homogenizing element includes a light incident surface and at least one diffusion surface, including: a first substrate, a carrier layer, a piezoelectric film, a driving electrode, a light-transmitting layer, and multiple light diffusion microstructures. The first substrate includes a first surface and a second surface opposite to each other. The carrier layer is located on the first surface of the first substrate and includes a light passing region penetrating the carrier layer, and includes a protruding structure enclosing the light passing region. The light-transmitting layer is provided overlapping on the protruding structure, and the surface of the light-transmitting layer covering the light passing region is the light incident surface. The multiple light diffusion microstructures are provided on the at least one diffusion surface, and projections of the multiple light diffusion microstructures on the light-transmitting layer are located in the light passing region.

    Method and system for performing high speed optical image detection
    37.
    发明授权
    Method and system for performing high speed optical image detection 有权

    公开(公告)号：US11895405B2

    公开(公告)日：2024-02-06

    申请号：US17622506

    申请日：2020-07-09

    申请人： UNIVERSITY COLLEGE CORK—NATIONAL UNIVERSITY OF IRELAND, CORK

    发明人： Nabeel Agha Riza

    IPC分类号： H04N23/71 ,  G02B5/02 ,  G02B26/08 ,  G02B27/10 ,  G02B27/14 ,  H03M7/30 ,  H04N23/741

    CPC分类号： H04N23/71 ,  G02B5/0205 ,  G02B26/0833 ,  G02B27/1013 ,  G02B27/141 ,  H03M7/3062 ,  H03M7/3066 ,  H04N23/741

    摘要： The present invention provides a method for performing optical image detection using a camera module comprising a Digital MicroMirror Device, a first point Photo Detector, a second point Photo Detector, a first lens and a second lens. The method comprises: mapping incident light onto an image plane of the DMD to form a light irradiance map; selecting N pixels on the DMD for time frequency coding; associating each selected pixel with a unique Walsh code time sequence; time frequency coding by the DMD the optical irradiance values of each selected pixel using a plurality of selected bits of its associated Walsh code time sequence; detecting the time frequency coded optical irradiance values of the selected pixels simultaneously at the first point Photo Detector and at the second point Photo Detector; and performing simultaneous signal processing on the time frequency coded optical irradiance values detected by the first point Photo Detector and by the second point Photo Detector to determine the light intensity of each of the selected pixels and produce an image of the incident light.

    Passive speckle-suppressing diffusers and associated methods and illuminators
    38.
    发明授权
    Passive speckle-suppressing diffusers and associated methods and illuminators 有权

    公开(公告)号：US11892654B2

    公开(公告)日：2024-02-06

    申请号：US16594534

    申请日：2019-10-07

    申请人： OmniVision Technologies, Inc.

    发明人： Shih-Hsin Hsu ,  Jau-Jan Deng ,  Wei-Ping Chen

    IPC分类号： G02B27/48 ,  G02B5/02 ,  G02B3/00 ,  G02B5/18

    CPC分类号： G02B27/48 ,  G02B3/0037 ,  G02B5/0278 ,  G02B5/0294 ,  G02B5/1871

    摘要： A passive speckle-suppressing diffuser includes a microlens array for diffusing a light field originating from one or more coherent light beams, and a diffractive optical element mounted in series with the microlens array and having a pixelated thickness distribution, characterized by a spatial variation across the diffractive optical element, to impose a spatially varying phase shift on the light field. The pixelated thickness distribution may be configured such that the spatially varying phase shift suppresses speckle of the light field while minimizing introduction of distinct diffraction structure. A method for passive speckle-suppressing diffusion a light field originating from one or more coherent light beams may include refracting the light field, through a microlens array, to diffuse the light field, and imposing a spatially varying phase shift on the light field to decohere the light field without introducing any first-order diffraction components deflected beyond angle spread introduced by the microlens array.

    Light transmissive structures for redistribution of light and lighting systems including same
    40.
    发明授权
    Light transmissive structures for redistribution of light and lighting systems including same 有权

    公开(公告)号：US11885485B2

    公开(公告)日：2024-01-30

    申请号：US17700990

    申请日：2022-03-22

    申请人： BRIGHTVIEW TECHNOLOGIES, INC.

    发明人： Ken G. Purchase ,  Bing Shen

    IPC分类号： F21V5/00 ,  G02B5/02 ,  G02B5/04

    CPC分类号： F21V5/005 ,  G02B5/0215 ,  G02B5/0231 ,  G02B5/0257 ,  G02B5/045 ,  G02B5/0278

    摘要： A light transmissive structure includes a light transmissive substrate having first and second opposing faces, and an array of microprism elements on the first face. Each microprism element includes a first inclined surface disposed at a first inclined angle relative to the second face, and a second inclined surface disposed at a second inclined angle relative to the second face. The first inclined angle is less than the second inclined angle, and a peak angle between the first inclined surface and second inclined surface is in the range of about 70 degrees to about 100 degrees. The second inclined surface has a convex curvature when viewed from angles perpendicular thereto. The light transmissive structure is configured to receive light from a light source facing the first face in a first direction and redistribute light emerging from the second face in a second direction different from the first direction.