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:
Oct. 17, 1989
Filed:
Feb. 17, 1988
Applicant:
Inventor:
Masakazu Yamagata, Tokyo, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350 9626 ; 350 9618 ;
Abstract
A viewing optical system for use with an endoscope and which permits a substantial reduction in the size of the objective lens system at the object end of the device, making the endoscope more maneuverable. The optical system includes an objective lens unit forming a curved image plane conjugate with the object plane and an optical-fiber image guide having one end surface curved to substantially conform to the image plane.