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. 24, 1982
Filed:
Mar. 12, 1980
Applicant:
Inventor:
Hiroichi Shinohara, Yokohama, JP;
Assignee:
Kabushiki Kaisha Ricoh, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350464 ; 350450 ;
Abstract
A reproduction lens assembly including two groups of three elements for providing a large aperture efficiency and a compact size formed by arranging a lens system symmetrically with respect to a stop wherein the each group of three elements further comprise a first convex Meniscus lens having a concave surface thereof directed toward the stop, the stop being positioned on the front side of the first Meniscus lens, a second concave Meniscus lens having a concave surface thereof directed toward the stop and a third convex Meniscus lens having a concave surface thereof directed toward the stop with a small air gap the third and second Meniscus lens.