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:
May. 23, 2023
Filed:
Aug. 12, 2020
Applicant:
Hoya Corporation, Tokyo, JP;
Inventors:
Toshiki Nakamura, Tokyo, JP;
Masaru Eguchi, Saitama, JP;
Yutaka Takakubo, Saitama, JP;
Yoshitake Tanno, Tokyo, JP;
Naomi Matsumoto, Tokyo, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01); G02B 5/00 (2006.01); G02B 1/11 (2015.01);
U.S. Cl.
CPC ...
G02B 27/0018 (2013.01); G02B 1/11 (2013.01); G02B 5/003 (2013.01);
Abstract
An optical element including a glass body is provided. The optical element includes a colored layer provided inside the glass body and positioned outside an effective aperture of the optical element. Coloring of the colored layer is a reduction pigment occurring in a glass component of the glass body. The colored layer suppresses occurrence of stray light and obtains sufficient light-shielding properties, so that a superior image quality can be achieved.