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:
Jul. 18, 1995
Filed:
Jun. 15, 1993
Masanobu Shigeta, Yokosuka, JP;
Shigeo Shimizu, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A dielectric mirror of a spatial light modulator having a photoconductive layer on which an image is written by a writing light carrying an image information and a photomodulator layer through which the written image is read out by irradiating a reading light and by reflecting the reading light with the dielectric mirror. The dielectric mirror is constructed by laminating plural kinds of layers respectively having different values of refractive indexes, for instance, Si layers and SiO.sub.2 layers. The resolution of the spatial light modulator degrades when an oxygen content rate in the Si layers becomes below a certain amount, on the contrary, the contrast ratio of the spatial light modulator degrades when the oxygen content rate in the Si layers becomes above a certain amount. The Si layers of the present invention have an oxygen content rate ranging from 10 to 40 atom %, preferably ranging from 15 to 35 atom %.