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    PHOTOVOLTAIC POWER GENERATION MODULE USING CONDENSING LENS HAVING MEDIUM THEREIN AND PHOTOVOLTAIC/SOLAR HEAT POWER GENERATION SYSTEM INCLUDING THE SAME
    61.
    发明申请
    PHOTOVOLTAIC POWER GENERATION MODULE USING CONDENSING LENS HAVING MEDIUM THEREIN AND PHOTOVOLTAIC/SOLAR HEAT POWER GENERATION SYSTEM INCLUDING THE SAME 有权

    公开(公告)号：US20250038702A1

    公开(公告)日：2025-01-30

    申请号：US18738881

    申请日：2024-06-10

    Applicant: Korea Photonics Technology Institute

    Inventor： Hyo Jin KIM

    IPC: H02S20/32 ,  G02F1/01 ,  G02F1/29 ,  H02S40/22

    Abstract: A photovoltaic power generation module may include a ball lens that receives a medium from the outside or outputs a medium to the outside, receives sunlight that proceeds thereto from the outside when a medium is introduced thereto, and focuses the medium on one focal point, a solar cell that is disposed at a point at which sunlight is focused by the ball lens and produces electric energy from the sunlight, a support part supporting the ball lens and the solar cell and that being rotatable in a preset direction, a first motor that moves the solar cell in a direction in which the solar cell becomes distant from or close to the ball lens, a second motor that rotates the solar cell in a direction θ on a spherical coordinate system, and a third motor that rotates the support part in a direction φ on the spherical coordinate system.

    LASER APPARATUS USING OPTICAL FIBERS FOR STABLE LASER WELDING, AND LASER WELDING METHOD USING SAME
    65.
    发明公开
    LASER APPARATUS USING OPTICAL FIBERS FOR STABLE LASER WELDING, AND LASER WELDING METHOD USING SAME 审中-公开

    公开(公告)号：US20230264300A1

    公开(公告)日：2023-08-24

    申请号：US17921981

    申请日：2021-06-18

    Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

    Inventor： Swook HANN

    IPC: B23K26/70 ,  B23K26/21 ,  B23K26/064 ,  B23K26/06

    CPC classification number: B23K26/702 ,  B23K26/21 ,  B23K26/064 ,  B23K26/0608

    Abstract: The present invention relates to a laser apparatus using optical fibers for stable laser welding and a laser welding method using same. Hybrid ring mode-shaped laser beams, in which a central beam using fiber laser is positioned at the center of outer beams using diode laser, are used to perform welding by irradiating a to-be-welded portion of an object with the outer beams, the central beam, and the outer beams in this order. Thus, since the welding is performed using the central beam as a heat source in a state in which the to-be-welded portion of the object has been heated with a sufficient amount of heat input, the temperature gradient of the to-be-welded portion is low and solidification cracking does not occur. Also, problems such as spatter and voids can be minimized, and the laser welding is stable, and thus a quality of welding that is uniform and stable overall can be obtained.

    Reactive multifocal optical system and augmented reality device using the same
    66.
    发明授权
    Reactive multifocal optical system and augmented reality device using the same 有权

    公开(公告)号：US11415729B2

    公开(公告)日：2022-08-16

    申请号：US16586978

    申请日：2019-09-28

    Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

    Inventor： Seonkyu Yoon ,  Dongkil Lee ,  Kwanghoon Lee ,  Yanggyu Kim

    IPC: G02B27/14 ,  G02B5/08 ,  G06T7/571 ,  G02B5/30 ,  G02B27/01 ,  G02B27/40 ,  G06F3/01 ,  G06V20/20

    Abstract: A multi-focal optical device comprises an image output unit outputting optical information, a linear polarizer uni-directionally polarizing the optical information, a first light reflector including a first polarizer transmitting light only in a first direction and reflecting the light transmitted through the first polarizer, a second light reflector including a second polarizer transmitting light only in a second direction perpendicular to the first direction and reflecting the light transmitted through the second polarizer, a light splitter splitting the optical information transmitted through the linear polarizer into the first light reflector and the second light reflector and reflecting the optical information reflected by one of the first light reflector or the second light reflector to allow the reflected optical information to form one focus, and a controller configured to control the linear polarizer to vary a direction of polarization of the linear polarizer.

    APPARATUS AND METHOD FOR OBJECT TRACKING IN WELDING PROCESS
    69.
    发明申请
    APPARATUS AND METHOD FOR OBJECT TRACKING IN WELDING PROCESS 有权

    公开(公告)号：US20220088696A1

    公开(公告)日：2022-03-24

    申请号：US16950920

    申请日：2020-11-18

    Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

    Inventor： Hoe Min KIM ,  Sung Kuk CHUN ,  Dong Kill LEE ,  Kwang Hoon LEE ,  Seon Man KIM

    IPC: B23K9/095 ,  G06T7/70

    Abstract: According to an embodiment, an object tracking device in a welding process tracks and outputs a predetermined object in a welding image. The object tracking device comprises a camera device capturing the welding image including a base material and a welding torch for welding the base material, a controller receiving a plurality of camera control parameter-varied images from the camera device, identifying the predetermined object in the received images, and generating an object tracking image, the plurality of camera control parameter-varied images having varied camera control parameters of the camera device, and an output device outputting the welding image captured by the camera device, the plurality of images received by the controller, or the object tracking image generated by the controller.

    Fluorophosphate glasses for active device
    70.
    发明授权
    Fluorophosphate glasses for active device 有权

    公开(公告)号：US10988406B2

    公开(公告)日：2021-04-27

    申请号：US16465424

    申请日：2018-05-21

    Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

    Inventor： Ju Hyeon Choi ,  Jung Whan In ,  June Park ,  Eui Sam Lee

    IPC: C03C3/247 ,  C03C13/04

    Abstract: Disclosed is fluorophosphate glasses for an active device, the fluorophosphate glasses including: a metaphosphate composition including Mg(PO3)2 of about 20 mol % to about 60 mol %; a fluoride composition including BaF2 of about 20 mol % to about 60 mol % and CaF2 of about 0 mol % to about 40 mol %; and dopants including rare earth elements, in which there is an effect of increasing a carrier lifetime at a metastable state energy level that is stimulated-emitted due to an efficient energy transfer phenomenon by composition optimization of dopants (e.g. Er and Yb).

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