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. 12, 1978
Filed:
Dec. 08, 1975
Applicant:
Inventor:
Soichi Nakamura, Kamakura, JP;
Assignee:
Nippon Kogaku K. K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
350212 ; 350214 ; 350215 ; 350216 ;
Abstract
A telephoto lens system consists of a first convergent group and a divergent group disposed rearwardly of the first group for forming a substantially afocal converter, and a second convergent group disposed rearwardly of said divergent group. The first convergent lens group and the divergent lens group are movable relative to each other along the optical axis of the lens system for effecting focusing.