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:
May. 11, 1993
Filed:
Mar. 22, 1991
Applicant:
Inventors:
Kanjo Orino, Kawasaki, JP;
Shigeru Oshima, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359738 ; 359601 ; 359611 ;
Abstract
This is to disclose an optical apparatus, comprising a plurality of optical lenses; and a plurality of light blocking plates or blocking member arranged in the direction of the optical axis for blocking harmful sagittal peripheral rays, the light blocking plates being installed in a ring shape at the pupil position of the optical lenses and being inclined, by an angle .alpha. respectively, to a plurality of imaginary planes including the optical axis.