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:
Sep. 24, 1991
Filed:
Sep. 11, 1989
Applicant:
Inventors:
Yoshiharu Takasugi, Iruma, JP;
Hiroyuki Fukuda, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
359728 ; 359708 ; 359663 ;
Abstract
An optical system for endoscopes so adapted as to be usable with video endoscopes, comprising an imaging lens system equipped with an aperture stop and a field lens component arranged on the image side thereof, and so designed as to prevent the color shading from being produced by selecting an adequate focal length for the field lens component.