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. 28, 2015
Filed:
Jan. 11, 2011
Applicants:
Pascal Benoit, Rennes, FR;
Guilhem Dubroca, Rennes, FR;
Khaled Sarayeddine, Rennes, FR;
Inventors:
Assignee:
Optinvent, Rennes, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 17/08 (2006.01); G03B 21/14 (2006.01); G03B 21/28 (2006.01);
U.S. Cl.
CPC ...
G02B 17/08 (2013.01); G02B 15/14 (2013.01); G03B 21/14 (2013.01); G03B 21/28 (2013.01);
Abstract
The invention proposes a short-distance front projection system, that is to say with a wide angle, occupying a small volume and offering a possibility of focusing as well a zoom function. It makes it possible to obtain images with a diagonal greater than 2 meters, the whole of the optical system being at least 50 cm from the plane of the image. This projector is constructed on the basis of three optical elements: an ocular, an afocal lens system and a final group forming an objective intended to form the intermediate image in front of the mirror.