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:
Jul. 18, 1989
Filed:
Mar. 19, 1987
Applicant:
Inventors:
Masayuki Suzuki, Atsugi, JP;
Jun Hattori, Atsugi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350413 ; 350 9618 ;
Abstract
A gradient index lens includes a first surface comprising a convex surface, a second surface comprising a convex surface, the convex surface of the second surface sharing the center of curvature with the convex surface of the first surface, and an index gradient N(.rho.) formed in the medium of the lens. The index gradient N(.rho.) is expressed as