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. 23, 1999
Filed:
Nov. 25, 1997
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359486 ; 359490 ; 4271631 ;
Abstract
A polarizer and method of making the polarizer includes forming plural grooved lines on a surface of a supporting body that is transparent to visible light. The plural grooved lines are straight, concave and parallel to one another. Respective of the plural grooved lines include a sidewall portion that has a fine line formed thereon where the fine line constitutes a residual portion of a larger thin film that was subjected to an etching process. The fine line is composed of a semiconductor a metal or a combination of the two.