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:
May. 07, 2013
Filed:
Sep. 23, 2010
Yoshimi Hashimoto, Kyoto, JP;
Yoshikazu Kataoka, Kyoto, JP;
Yoshimi Hashimoto, Kyoto, JP;
Yoshikazu Kataoka, Kyoto, JP;
Abstract
A light from a laser light source () is collected at a position of a slit () in a vertical direction by a first optical system () to form an intermediate image which is long in a horizontal direction corresponding to an arrangement direction of light modulator elements. An undesired light such as side lobes which appear on the both sides of the intermediate image in the vertical direction is blocked by a slit () and the intermediate image is reformed by a second optical system (), to direct a liner illumination light onto the spatial light modulator (). Thus, in a state where moving ribbons are sagged and first order diffracted lights are emitted in a light modulator element, it is possible to prevent a zeroth order light from being emitted from both end portions of ribbons, to thereby enhance contrast of the signal light.