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:
Mar. 27, 1979
Filed:
Dec. 05, 1977
Roger W Honebrink, Chaska, MN (US);
David S Lo, Burnsville, MN (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
An apparatus for and a method of optically recording or writing data into a thermoplastic layer is disclosed. The recording medium is fabricated as an integral part of the face of a cathode ray tube (CRT) and includes a layer of thermoplastic material that is thermoplastically responsive to a heating light beam having a wavelength within the infrared (IR) range and that is a dielectric capable of storing charges corresponding to a data-containing charging (electron) beam. The thermoplastic layer is first selectively exposed to the charging (electron) beam for spatially selectively electrically charging the exposed surface of the thermoplastic layer and is then softened by the heating (IR) beam causing the charged, softened surface to distort under the forces of the data-bearing charge. An additional heat conductive layer, which is non-responsive to the heating (IR) beam, ensures fast heat transfer of the heat in the thermoplastic layer to a cooperating, coolant controlled heat sink, both of which combine to provide rapid cooling of the heat exposed portion. This ensures a short-duration, erase-write-read cycle.