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:
Dec. 07, 1993
Filed:
Mar. 26, 1992
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
Spatial light modulator of reflective type having a laminated structure of multiple layers comprising a photoconductive layer on which an information carried by an incident writing light is written, a photomodulation layer which modulates an incident reading light correspondingly with the written information and a composite film made of insulation material and light-blocking material which are chemically non-reactive each other, the composite film is interposed between the photoconductive layer and the photomodulation layer to block the incident reading light passing through the photomodulation layer. The composite film may be formed by evaporating simultaneously an insulation material of Al.sub.2 O.sub.3 and a light-blocking material of Ge from the respective material sources within a vacuum chamber of physical vapor deposition.