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:
Mar. 07, 1989
Filed:
Sep. 15, 1987
Applicant:
Inventor:
Kunimitsu Kobayashi, Tokyo, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350413 ; 350420 ; 350433 ;
Abstract
A collimator optical system for effecting elliptical-to-circular cross section is disclosed which comprises two lenses in a slab form whose refractive index distribution in one plane is such that the refractive index decreases gradually from the center outward in the direction of their thickness. The two lenses are spaced on the optical axis in such a way that the direction of refractive index distribution in one lens crossing the direction of refractive index distribution in the other lens at right angles.
Kobayashi, Kunimitsu. (1989). Collimator optical system for effecting elliptical-to-circular conversion (U.S. Patent No. 4810069). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4810069
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile