公开(公告)号：US12123829B2

公开(公告)日：2024-10-22

申请号：US17726697

申请日：2022-04-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kurozuka ,  Tatsuo Itoh ,  Kosuke Imawaka ,  Hiroyuki Furuya

IPC: G01N21/3554 ,  G01J1/04 ,  G01N21/359 ,  G01N21/47 ,  G08G1/00

CPC classification number: G01N21/3554 ,  G01J1/0411 ,  G01J1/0455 ,  G01N21/359 ,  G01N21/47 ,  G08G1/00 ,  G01N2021/4761

Abstract: An optical device includes: a light source part configured to project illumination light toward a sensing region; a photodetector configured to receive reflected light of the illumination light reflected on the sensing region; and a condenser mirror. The condenser mirror has a through hole through which the illumination light from the light source part passes and an optical axis of the light source part and an optical axis of the condenser mirror are aligned with each other. A reflection surface of the condenser mirror has a shape obtained by cutting out a columnar body extending in a projection direction of the illumination light, with a spheroid whose rotation axis is a major axis. The photodetector is disposed in a direction toward a first focal position of the condenser mirror. The sensing region is set in a direction toward a second focal position of the condenser mirror.