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    Optical encoder system and method
    1.
    发明授权
    Optical encoder system and method 有权

    公开(公告)号：US11156481B2

    公开(公告)日：2021-10-26

    申请号：US16986575

    申请日：2020-08-06

    Applicant: Michael Naor

    Inventor： Michael Naor

    IPC: G01D5/34 ,  G01D5/347 ,  G01D5/38 ,  G01M15/06 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/08 ,  G11B7/09 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374

    Abstract: An optical encoder is provided. The encoder includes an optical disc mounted on a shaft, the optical disc containing pit and land markings; an optical pickup unit for an optical disc that receives light from the optical disc and supplies as an output an electrical signal representative of the received light, comprising: a reading head objective lens, and dynamic steering actuators that control the focus and tracking of the reading head objective lens; a processor that receives as an input the electrical signal from the optical pickup unit and reports motion of the substrate based on the received at least one electrical signal.

    Optical unit
    2.
    发明授权
    Optical unit 有权

    公开(公告)号：US11141817B2

    公开(公告)日：2021-10-12

    申请号：US16407820

    申请日：2019-05-09

    Applicant: OLYMPUS CORPORATION

    Inventor： Keiichi Asami ,  Junichi Okubo

    IPC: B23K26/282 ,  G02B7/02 ,  G11B7/22 ,  G02B7/00 ,  G11B7/08

    Abstract: An optical unit includes: a first optical device holding body that is sleeve-shaped and includes a first holding portion configured to hold therein at least one first optical device, and a first fitting portion extending from the first holding portion; a second optical device holding body that is sleeve-shaped and includes a second holding portion configured to hold therein at least one second optical device, and a second fitting portion extending from the second holding portion; and a welded portion that is melted and solidified over the first fitting portion and the second fitting portion in an overlapping portion between the first fitting portion and the second fitting portion. A first welding width at a center of the first fitting portion and a second welding width at a center of the second fitting portion are substantially identical in the optical axis direction of the optical unit.

    Method for reading and writing with holographic system and holographic storage system
    3.
    发明授权
    Method for reading and writing with holographic system and holographic storage system 有权

    公开(公告)号：US11100950B1

    公开(公告)日：2021-08-24

    申请号：US17084607

    申请日：2020-10-29

    Applicant: National Central University

    Inventor： Yeh-Wei Yu ,  Ching-Cherng Sun

    IPC: G11B7/00 ,  G11B7/1353 ,  G11B7/007 ,  G11B7/08 ,  G11B20/10 ,  G11B7/1372 ,  G11B7/0065

    Abstract: A method for reading and writing with holographic system includes the following operations: (a) providing a reference light and a signal light; (b) transferring the reference light and the signal light to an optical recording medium, for recording an interference grating; (c) changing the reference light and the signal light and repeating the operations (a) to (b) until M interference gratings are recorded on the optical recording medium; (d) providing a reading light to the optical recording medium, for reading the M interference gratings at the same time to generate an interference result, wherein the interference result is a result that diffraction signals of the M interference gratings interfere to each other; and (e) changing the reading light and repeating the operation (d), for obtaining N interference results. A holographic storage system is also disclosed herein.

    HOLOGRAPHIC DATA STORAGE DEVICE WITH SINGLE-ARM STRUCTURE
    4.
    发明申请
    HOLOGRAPHIC DATA STORAGE DEVICE WITH SINGLE-ARM STRUCTURE 有权

    公开(公告)号：US20210201948A1

    公开(公告)日：2021-07-01

    申请号：US17135113

    申请日：2020-12-28

    Applicant: Amethystum Storage Technology Co., Ltd.

    Inventor： Mu ZHENG ,  Tiewei LUO ,  Jun TIAN ,  Dejiao HU ,  Yicheng LIU

    IPC: G11B7/0065 ,  G11B7/08 ,  G11B7/1395 ,  G11B7/1372 ,  G11B7/1381

    Abstract: The present invention relates to a holographic data storage device with a single-arm structure, and belongs to the technical field of optical holographic storage. According to the device disclosed in the present invention, a part of a reference arm and a part of a signal arm are integrated together to form a single-arm structure, which can not only reduce the number of optical and mechanical elements, but also reduce the system volume and cost without degrading performance. In addition, a signal beam and a reference beam share the same relay lens, so that the impact of environmental interference on the two beams is equal, and the stability of the entire system is improved.

    OPTICAL ENCODER SYSTEM AND METHOD
    5.
    发明申请
    OPTICAL ENCODER SYSTEM AND METHOD 审中-公开

    公开(公告)号：US20190195662A1

    公开(公告)日：2019-06-27

    申请号：US16290394

    申请日：2019-03-01

    Applicant: Excelero Storage Ltd.

    Inventor： Michael NAOR

    IPC: G01D5/347 ,  G11B7/08 ,  G11B7/09 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1374

    Abstract: An improved optical encoder uses an optical pick-up unit that provides for degrees of freedom in the tracking and focus axes that are unavailable in conventional optical encoders thereby improving the encoders' performance. In an embodiment the encoder employs an optical disc marked with pits and lands which may be arranged in a spiral pattern. The optical disc is mounted on the shaft whose motion is to be monitored by the optical encoder. The encoder may be arranged to read the markings on the optical disc using the three-beam pickup method.

    Optical information recording/reproducing apparatus
    8.
    发明授权
    Optical information recording/reproducing apparatus 有权
    光信息记录/重放装置

    公开(公告)号：US09520152B2

    公开(公告)日：2016-12-13

    申请号：US14848683

    申请日：2015-09-09

    Applicant: Hitachi-LG Data Storage, Inc.

    Inventor： Kazuyoshi Yamazaki

    IPC: G11B7/00 ,  G11B7/1365 ,  G11B7/08 ,  G11B7/085

    CPC classification number: G11B7/1365 ,  G11B7/083 ,  G11B7/08564

    Abstract: A hologram apparatus and hologram optical system includes: a light source which emits a light beam; a splitter which splits the light beam emitted from the light source into a first light beam and a second light beam; a first lens for exposing an optical information recording medium to convergent light of the first light beam; an optical path angle varying device which causes the second light beam to become incident at substantially the same position as the first light beam in the optical information recording medium and changes an angle of incidence of the second light beam incident on the optical information recording medium; and an optical path shifting element which shifts a position of a light beam incident on the optical information recording medium, according to an angle to the optical information recording medium of the light beam incident on the optical information recording medium.

    Abstract translation: 全息装置和全息光学系统包括：发射光束的光源; 分离器，其将从所述光源发射的光束分成第一光束和第二光束; 第一透镜，用于将光学信息记录介质曝光到第一光束的会聚光; 光路角度改变装置，其使第二光束入射到与光信息记录介质中的第一光束大致相同的位置，并改变入射在光信息记录介质上的第二光束的入射角; 以及光路移动元件，其根据入射在光学信息记录介质上的光束的光学信息记录介质的角度偏移入射在光学信息记录介质上的光束的位置。

    OPTICAL INFORMATION REPRODUCING DEVICE AND REFERENCE BEAM ADJUSTING METHOD
    9.
    发明申请
    OPTICAL INFORMATION REPRODUCING DEVICE AND REFERENCE BEAM ADJUSTING METHOD 审中-公开
    光学信息再现设备和参考光束调整方法

    公开(公告)号：US20160336034A1

    公开(公告)日：2016-11-17

    申请号：US15151607

    申请日：2016-05-11

    Applicant: Hitachi-LG Data Storage, Inc.

    Inventor： Takeshi IMAI ,  Kouichirou NISHIMURA ,  Masanobu SHIGAKI

    IPC: G11B7/08 ,  G11B7/13 ,  G11B7/126 ,  G11B7/0065 ,  G11B7/007

    CPC classification number: G11B7/083 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/126 ,  G11B7/13

    Abstract: A reference beam adjusting method for reproducing information recorded on an optical information recording medium by utilizing interference of a signal beam with a reference beam includes a step of changing the wavelength of the reference beam; a step of changing the angle of the reference beam to the optical information recording medium; a step of detecting a brightness distribution of the reproduction image from the optical information recording medium; a step of calculating a gravity center dispersion in the brightness distribution of the reproduction image; and a step of controlling the angle and wavelength of the reference beam based on the gravity center dispersion.

    Abstract translation: 用于通过利用信号光束与参考光束的干涉来再现记录在光学信息记录介质上的信息的参考光束调整方法包括改变参考光束的波长的步骤; 将参考光束的角度改变到光学信息记录介质的步骤; 从光信息记录介质检测再现图像的亮度分布的步骤; 计算再现图像的亮度分布中的重心色散的步骤; 以及基于重心分散控制参考光束的角度和波长的步骤。

    Digital hologram display device
    10.
    发明授权
    Digital hologram display device 有权
    数字全息图显示装置

    公开(公告)号：US09442460B2

    公开(公告)日：2016-09-13

    申请号：US13949443

    申请日：2013-07-24

    Applicant: LG DISPLAY CO., LTD.

    Inventor： Minsung Yoon ,  Sunwoo Kim ,  Minyoung Shin

    IPC: H04N13/04 ,  G02F1/13 ,  G03H1/08 ,  G03H1/12 ,  G11B7/00 ,  G03H1/02 ,  G03H1/22 ,  G02F1/29 ,  G11B7/08 ,  G11B7/0065

    CPC classification number: G03H1/02 ,  G02F1/292 ,  G03H1/0841 ,  G03H1/2294 ,  G03H2001/0224 ,  G03H2225/22 ,  G03H2225/32 ,  G11B7/0065 ,  G11B7/083 ,  H04N13/31

    Abstract: The present disclosure relates to a digital hologram display device displaying 3D image as a hologram by using a complex modulation. The digital hologram display device comprising a spatial light modulator including a first pixel outputting a first modulation light by modulating a phase of a first plane-polarized light and a second pixel outputting a second modulation light by modulating the phase of the first plane-polarized light, wherein the second pixel is adjacent to the first pixel; and a light combiner changing a path of the first modulation light outputted from the first pixel so that the path of the first modulation light corresponds to a path of the second modulation light outputted from the second pixel for combining the first modulation light with the second modulation light, wherein a phase of the first modulation light is different from a phase of the second modulation light.

    Abstract translation: 数字全息图显示装置技术领域本公开涉及通过使用复数调制来显示3D图像作为全息图的数字全息图显示装置。 数字全息图显示装置包括空间光调制器，该空间光调制器包括通过调制第一平面偏振光的相位而输出第一调制光的第一像素和通过调制第一平面偏振光的相位而输出第二调制光的第二像素 ，其中所述第二像素与所述第一像素相邻; 以及组合器，其改变从所述第一像素输出的所述第一调制光的路径，使得所述第一调制光的路径对应于从所述第二像素输出的所述第二调制光的路径，用于将所述第一调制光与所述第二调制 光，其中所述第一调制光的相位与所述第二调制光的相位不同。

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