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. 07, 2023
Filed:
Jul. 10, 2019
Sumita Optical Glass, Inc., Saitama, JP;
Dayong LI, Saitama, JP;
Hiroki Watanabe, Saitama, JP;
Morito Kanke, Saitama, JP;
Shotaro Sano, Saitama, JP;
Jun Otake, Saitama, JP;
Dayong Li, Saitama, JP;
Sumita Optical Glass, Inc., Saitama, JP;
Other;
Abstract
A relay optical systemfor a rigid endoscope includes a lens fixing frameand a plurality of lenses. The lens fixing framehas a plurality of tubular bodies. The plurality of tubular bodiesare joined coaxially to each other. The plurality of lensesare located at positions other than a joint position jp of the tubular bodiesin an axis direction of the lens fixing frame. The plurality of lensesare located in the lens fixing frameso as to have a coincident optical axis. The plurality of lensesdo not include a cemented lens.