Erasable optical data storage medium and method and apparatus fo

Details Erasable optical data storage medium and method and apparatus fo Erasable optical data storage medium and method and apparatus fo

1988-12-20

1990-03-27

Stephan, Steven L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

358344, 346 76L, 3461351, 369275, 369286, 369288, G11B 726, G01D 1534

Patent

active

049126962

ABSTRACT:
An erasable optical data storage medium including a substrate and a dual layer of a first material and a second material on the substrate. The dual layer is susceptible to expansion and contraction, to writing data thermally, to erasing data thermally and mechanically, and to reading data optically, the first material and the second material, respectively, being bonded together and remaining in the same physical state upon the expansion and relaxation of the dual layer. Methods and apparatus are also disclosed for recording data bits on the medium.

REFERENCES:
patent: 4264986 (1981-04-01), Willis
patent: 4278734 (1981-07-01), Ohta et al.
patent: 4285056 (1981-08-01), Bell
patent: 4300227 (1981-11-01), Bell
patent: 4398203 (1983-08-01), Cornet
patent: 4404656 (1983-09-01), Cornet
patent: 4430659 (1984-02-01), Maffitt et al.

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