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:
Jun. 13, 2006
Filed:
Jan. 14, 2004
Applicant:
Peter Dürr, Dresden, DE;
Inventor:
Peter Dürr, Dresden, DE;
Assignee:
Micronic Laser Systems AB, Taby, SE;
Primary Examiner:
Int. Cl.
CPC ...
G01R 13/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a method to detect at least one defective pixel in a spatial light modulator comprising numerous pixel elements. The spatial light modulator is imaged to a detector. A relayed image of a first chess-board pattern of pixels in said spatial light modulator is detected by said detector. A relayed image of a second chess-board pattern of pixels in said spatial light modulator is detected, which is inverted to the first chessboard pattern, by said detector. The relayed images of said first and second chessboard patterns are analyzed to detect differences between said detected images and theoretical images thereof.