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. 05, 2006
Filed:
Feb. 16, 2005
Applicant:
Peter Karbe, Leun, DE;
Inventor:
Peter Karbe, Leun, DE;
Assignee:
Leica Camera AG, Solms, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/62 (2006.01); G02B 13/18 (2006.01); G02B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photographic objective of the modified double gauss type is presented. The object has a forward group that includes three lens elements (L, L, L) and has the refractive power sequence ++−. The objective also includes an aperture and a rear group including lens elements (L, L, L) of refractive power sequence −++. The lens element of negative refractive power (L) is designed as a meniscus with an aspheric surface concave relative to the aperture, and a lens element of negative refractive power (L) with surfaces concave on both sides is arranged downstream of the last lens element of positive refractive power (L).