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:
Nov. 18, 1980
Filed:
Jan. 30, 1979
Soichi Nakamura, Kamakura, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A Gauss type photographic lens comprises a first convergent lens group G1 and a second convergent lens group G2. The first convergent lens group G1 comprises, in the order from the object side, a positive lens component L1, a positive meniscus lens component L2 having its convex surface facing the object side, and a negative meniscus lens component L3 having its convex surface facing the object side, and the second convergent lens group G2 comprises, in the order from the object side, a meniscus lens component L4 consisting of a negative lens and a positive lens cemented together and having its concave surface facing the object side, and a positive lens component L5. Such a lens arrangement is well-known and to maintain the lens construction more compact and better correct the various aberrations, it is necessary that conditions be satisfied.