The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2025
Filed:
Nov. 17, 2021
Applicant:
Ihi Corporation, Tokyo, JP;
Inventors:
Kenichi Hamaguchi, Tokyo, JP;
Hiroaki Imaizumi, Tokyo, JP;
Jingyu Hu, Tokyo, JP;
Takanori Nishimura, Tokyo, JP;
Kenichi Nakamura, Tokyo, JP;
Assignee:
IHI Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N 7/18 (2006.01); G06V 10/147 (2022.01); G06V 20/52 (2022.01); G08B 21/18 (2006.01);
U.S. Cl.
CPC ...
G06V 20/52 (2022.01); G06V 10/147 (2022.01); G08B 21/18 (2013.01); H04N 7/183 (2013.01);
Abstract
Provided are an image capturing device for capturing an image in a target area, transmission parts through which an outside can be visually observed from inside of the target area and polarizing filters on an light path from the transmission parts to the image capturing device. The front- and depth-side polarizing filters relative to the image capturing device are arranged so as to have polarizing directions crossing each other. A foreign matter in the target area is detected on the basis of the image acquired by the image capturing device.