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. 27, 1990
Filed:
Sep. 05, 1989
Applicant:
Inventors:
Masatake Kato, Kunitachi, JP;
Shohei Takeda, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 79 ; 354295 ;
Abstract
An attachment lens and a camera system, comprising an attachment lens adapted to be attached to the subject side of a camera which is equipped with separate optical openings for the photography system, the finder system, the photometry system, and the colorimetry system. The attachment lens includes an optical element which is on the camera side and which is equipped with a plurality of integrally formed sections facing the optical openings of the camera and having different refractive power configurations, thereby allowing the optical systems to be arranged close to each other.