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. 07, 1977
Filed:
Jun. 27, 1975
Kenneth L Davis, Fairfax, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An improved optical storage device capable of storing optical images in a charge pattern in a high-resistivity piezoelectric semiconductor layer on a semiconductor substrate. A semiconductor substrate, coated with a layer of electrically insulating material, has a layer of high-resistivity piezoelectric semiconductor covering the insulating layer and covered by a semitransparent biasing electrode. When a negative bias is applied to the electrode, and an optical pattern applied through the electrode, slow states are charged in a short interval to store, for long periods, a pattern imaged by the light. The optical pattern can then be read by using acoustic surface wave imaging techniques to provide electrical imaging of the stored optical pattern.