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:
Jun. 27, 2023
Filed:
Feb. 21, 2022
Applicant:
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Inventors:
Toshiro Sakamoto, Tokyo, JP;
Tatsushi Yagi, Tokyo, JP;
Assignee:
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 21/64 (2006.01); G01N 21/552 (2014.01); G01N 21/3504 (2014.01); G01N 21/3577 (2014.01); G02B 6/42 (2006.01);
U.S. Cl.
CPC ...
G01N 21/552 (2013.01); G01N 21/3504 (2013.01); G01N 21/3577 (2013.01); G02B 6/4215 (2013.01);
Abstract
An optical waveguide includes a core layer which extends along a longitudinal direction and through which light can propagate; and a protective film that is formed on at least a portion of a surface of the core layer and has a smaller refractive index than the core layer. At least a portion of the protective film is provided in a manner allowing contact with a gas or a liquid. In a cross-section of at least a portion perpendicular to a longitudinal direction of the core layer, the protective film is formed around the entire surface of the core layer.