公开(公告)号：US20240144462A1

公开(公告)日：2024-05-02

申请号：US18495880

申请日：2023-10-27

Applicant: Korea Photonics Technology Institute

Inventor： Hoe Min KIM ,  Sung Kuk CHUN ,  Seon Man KIM ,  Kwang Hoon LEE ,  Jeong Rok YUN ,  Un Yong KIM

IPC: G06T7/00 ,  G06T7/11 ,  G06V20/64

CPC classification number: G06T7/0004 ,  G06T7/11 ,  G06V20/64 ,  G06T2200/04 ,  G06T2207/10028

Abstract: Disclosed are an apparatus and system for evaluating a welding condition on the basis of three-dimensional data. An aspect of the present embodiment provides an apparatus for evaluating a welding condition, the apparatus including a communication unit configured to receive a three-dimensional image for an evaluation target from the outside, a base material recognition unit configured to recognize a base material from the three-dimensional image for the evaluation target by using a point cloud, a bead extraction unit configured to extract a welding bead welded between the base materials, a bead cross-section acquisition unit configured to acquire cross-sections at preset intervals for the extracted welding bead, and a profile analysis unit configured to analyze a profile of the welding bead for the cross-section acquired by the bead cross-section acquisition unit.

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.

公开(公告)号：US20240168270A1

公开(公告)日：2024-05-23

申请号：US18315947

申请日：2023-05-11

Applicant: Korea Photonics Technology Institute

Inventor： Seon Kyu YOON ,  Jin Su Lee ,  Sung Kuk CHUN

IPC: G02B21/04 ,  G02B21/36 ,  G03H1/00

CPC classification number: G02B21/04 ,  G02B21/365 ,  G03H1/0005 ,  G03H2001/005

Abstract: This disclosure relates to a digital holographic microscope which is robust to an external environment. According to an aspect of the present embodiment, there is provided an optical system for a digital holographic microscope, the optical system including a beam splitter which reflects a light radiated from a light source toward an object, or passes a light reflected from and traveling from the object; an objective lens focusing the light reflected by the beam splitter on the object; a transflective mirror which is located on the surface of the objective lens and is determined to be transparent or reflective depending on a polarization direction of a light incident to the transflective mirror; and a wave plate which converts the light passing through the beam splitter into a circularly polarized light.

公开(公告)号：US20230124089A1

公开(公告)日：2023-04-20

申请号：US17509305

申请日：2021-10-25

Applicant: KOREA PHOTONICS TECHNOLOGY INSTITUTE

Inventor： Seon Kyu YOON ,  Ha Mong SHIM ,  Jin Su LEE ,  Sung Kuk CHUN

IPC: G02B5/10 ,  G03B21/28

Abstract: According to an embodiment, there is provided a reflector reflecting an immersive image output from a projector to a screen to allow a viewer to recognize the immersive image. The reflector comprises a central portion that is flat within a predetermined range with respect to a center of the reflector and a curved portion having a curvature out of the predetermined range.