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:
Apr. 15, 1997
Filed:
Jun. 13, 1995
Applicant:
Inventors:
Brigitte Loiseaux, Villebon Sur Yvette, FR;
Jean-Pierre Huignard, Paris, FR;
Christophe Nicolas, Paris, FR;
Claude Puech, Ballainvilliers, FR;
Assignee:
Thomson-CSF, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03H / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
359 15 ; 359-1 ; 359619 ; 359620 ; 359625 ; 359626 ;
Abstract
The invention relates to an illumination device in which a holographic device (HP.sub.i) separates the polarizations of an incident beam. The resulting polarized beam is transmitted to a holographic device (HL.sub.i) focusing the beam at various points of a screen. This screen may be a liquid-crystal screen (LCD). Applications: Liquid-crystal display.