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:
Jul. 03, 1984
Filed:
Sep. 27, 1982
Applicant:
Inventor:
Koichi Wakamiya, Tokyo, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350472 ;
Abstract
In a four-unit five-lens system wherein in succession from the object side, each of a first lens and a second lens comprises a positive meniscus lens having its convex surface facing the object side, a third lens comprises a biconcave lens, a fourth lens comprises a biconvex lens, a fifth lens comprises a negative meniscus lens having its convex surface facing the image side, the fourth lens and the fifth lens being cemented together to form a positive cemented lens, and a diaphragm is provided most adjacent to the image side, a behind diaphragm lens satisfies certain conditions.