George E Castro

US Patent:

41019768, Jul 18, 1978

Filed:

Feb 14, 1977

Appl. No.:

5/768250

Inventors:

George Castro - San Jose CA
Dietrich Haarer - San Jose CA
Roger Morton MacFarlane - Palo Alto CA
Hans Peter Trommsdorff - St. Martin d'Uriage, FR

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11C 1304

US Classification:

365119

Abstract:

An optical data storage system and method that utilizes the frequency dimension to increase the storage capacity significantly. The system includes a storage material, for example, in the form of a block, adapted to undergo a photo induced reaction upon exposure to light and which exhibits inhomogeneous absorption line broadening. Data bits are stored by selective photo induced reactions induced by a narrow band laser at specific frequencies within the broad inhomogeneous line. The lifetime of these photo induced data bits is of the order of years so as to provide a non-volatile storage system. In a preferred embodiment, a material is selected so that the photo induced reaction can be made reversible thereby permitting, when desired, the erasing of the data bits.

Address:

1069 Terra Noble Way, San Jose, CA 95132

Phone:

4082540534

VIN:

4T1BD1FKXCU045774

Make:

TOYOTA

Model:

CAMRY HYBRID

Year:

2012