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:
Nov. 20, 1979
Filed:
Aug. 08, 1977
Applicant:
Inventors:
Thomas L Credelle, East Windsor, NJ (US);
Fred W Spong, Lawrenceville, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350-363 ; 350-384 ; 3501 / ; 350360 ;
Abstract
A synthetic focused image hologram of a white light image is recorded as variations in the depths of grooves of a diffraction grating in a layer of thermoplastic material located on a layer of photoconductive material. The thermoplastic layer is manufactured with initial, uniform, shallow grooves of the diffraction grating. A voltage is applied across the layers to deposit a uniform charge, a white-light image is projected on the thermoplastic layer, the layers are recharged and the thermoplastic layer is heated, whereby the initial shallow grooves are selectively deepened in accordance with the image.