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:
Jan. 12, 1988
Filed:
Jun. 11, 1985
Applicant:
Inventors:
Michitaka Setani, Kawasaki, JP;
Mitsuhiro Tokuhara, Chigasaki, JP;
Hiroaki Tsuchiya, Yokohama, JP;
Haruhisa Honda, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355-1 ; 355 46 ;
Abstract
In an imaging optical system, the angular aperture of distributed index optical elements which are optical elements forming the imaging optical system is 9.degree. or greater and the degree of superposition M of images on a light-receiving surface is M=2.75+0.5x. The degree of superposition M of images is represented by M=X.sub.0 /D, where D is the effective diameter of the optical elements and X.sub.0 is the field radius thereof. Also, x is 0 or a greater integer.