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. 30, 2011
Filed:
Jan. 07, 2005
Applicants:
Arno Schubert, Chevaigne, FR;
Pascal Benoit, Liffre, FR;
Inventors:
Arno Schubert, Chevaigne, FR;
Pascal Benoit, Liffre, FR;
Assignee:
Thomson Licensing, Boulogne, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/56 (2006.01); G02B 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Fresnel lens comprises at least one first prism and one second prism. Each prism has a first side and a second side which forms with a main axis an angle greater than that formed by the first side and the main axis. Conventionally, the second side of the first prism collimates the light received from a light source in line with the main axis. In order to improve the optical effectiveness, the second side of the second prism transmits the light received from the source in a first direction slightly different from the main axis.