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. 09, 1993
Filed:
Oct. 14, 1992
Applicant:
Inventors:
Masami Nishida, Tokyo, JP;
Masataka Izawa, Tokyo, JP;
Manabu Akagi, Tokyo, JP;
Masayuki Akiyama, Tokyo, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359634 ; 359638 ; 359601 ; 359614 ; 359589 ; 359837 ;
Abstract
A three color separation/synthesis mirror device for a liquid crystal projector comprises four dichroic mirrors whose joint part has a V-shaped notch in which a higher refractive index is filled thereby to eliminate stray lights. The device may have a prism at the joint part for causing an emitted light to be parallel with an incident light.