Optical storage medium using the frequency domain

Details Optical storage medium using the frequency domain Optical storage medium using the frequency domain

1978-03-20

1980-01-08

Hecker, Stuart N.

Static information storage and retrieval

Information masking

Transparency

365113, G11C 1304

Patent

active

041830946

ABSTRACT:
An optical storage medium in which the effect of optical interference is utilized to provide information storage. Heating of selected portions of the optical storage medium causes a permanent change in the wavelength and intensity of the interference fringes of the optical storage medium, and those changes give rise to large changes in light reflectivity at the initial interference fringe wavelengths, and hence gives rise to an optical pattern that is readily detectable. Preferred storage medium materials include alloys of the Ge-Se-S-Te group overlaying a metallic layer.

REFERENCES:
patent: 3737877 (1973-06-01), Feinleib
Welber et al., Reading Information Stored in Chalcogenide Films, IBM Tech. Disclosure Bulletin, vol. 15, No. 5, 10/72, pp. 1588-1589.
Brodsky, Multilayer Memory Elements for Beam Addressable Memories, IBM Tech. Disclosure Bulletin, vol. 13, No. 10, 3/71, pp. 3001-3002.

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