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. 04, 2000
Filed:
May. 19, 1998
Junko Kuramochi, Yokohama, JP;
Osamu Koyama, Hachioji, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is disclosed an optical modulation device provided with a binary-type diffraction grating for separating incident light into plural colored lights and an optical modulation element including plural pixels and modulating the incident light in each of the pixels wherein the colored lights from the diffraction grating are introduced into the pixels provided respectively for the colored lights in the optical modulation element. The optical modulation element comprises a portion for controlling the optical modulation, a portion controlled by the optical modulation, an entrance side polarizing element, and an exit side polarizing element, wherein the polarizing direction of the entrance side polarizing element is parallel to a plane formed by the grating direction vector of the diffraction grating and the normal line vector thereof.