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. 26, 1985
Filed:
Aug. 18, 1982
Applicant:
Inventor:
Noboru Yamada, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350253 ;
Abstract
A plastic lens includes a lens body having effective optical diameter and is mounted in a lens mount by a hold ring which is threaded in the mount. Thin portion is formed outside the lens body and is thinner than minimum thickness of the lens body; end portion is formed outside from and thicker than the thin portion and is adapted to secure the lens with the lens mount and the hold ring. The thin portion absorbs heat stress caused by linear elongation coefficient difference between plastic lens and aluminum lens mount.