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:
Aug. 03, 1982
Filed:
Jul. 18, 1980
Applicant:
Inventors:
Assignee:
Thompson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
430 12 ; 430 23 ; 430 28 ; 430 29 ; 430 27 ; 430 25 ; 430321 ; 430324 ; 430950 ; 350311 ; 3502 / ;
Abstract
For improving the contrast of information displayed on the screen, there is placed in front of this latter a filter comprising a matrix of channels pierced in a photosensitive glass plate. The pierced plate is covered over the whole of its surface with a blackened deposit so as to reduce to the maximum its coefficient of reflection. Thus filters can be formed readily on request, according to the direction of observation in particular, with a good coefficient of transmission and improved contrast.