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:
Aug. 19, 1986
Filed:
Jan. 04, 1984
Applicant:
Inventor:
Takashi Kurihara, Tokyo, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350432 ; 350469 ;
Abstract
A photographic lens system with a short overall length comprising a first, second, third and fourth lens components, in which the first lens component is a positive meniscus lens, the second lens component is a biconcave lens, the third lens component is a biconvex lens, and the fourth lens component is a negative meniscus lens, and in which at least one of respective surfaces of the first, second and third lens components and at least one of respective surfaces of the fourth lens component are arranged as aspherical surfaces, the photographic lens system having a large aperture ratio and well corrected aberrations.