Method and apparatus for erasing information from optical record

Details Method and apparatus for erasing information from optical record Method and apparatus for erasing information from optical record

1991-11-19

1994-05-10

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369100, 3692754, 369288, 360 59, 430270, 430945, 430495, G11B 724, G11B 700

Patent

active

053114990

ABSTRACT:
A method and apparatus for erasing information from optical recording tape having a thermo-deforming layer is disclosed in which information is recorded by forming bumps with residual stress deformed viscoelastically by way of heating portions of the thermo-deforming layer, and is erased by making the bumps planar by re-heating the bumps in order to remove the residual stress. The information is erased by forming a focal line on the optical recording tape using optical elements for emitting and condensing light of a predetermined thermal energy, and reheating the thermo-deforming layer including the bumps on the focal line. The information is effectively erased by means of an erasing optical device which forms a focal point, on the optical recording tape having the thermo-deforming layer. Thus, low power consumption is achieved by the efficient use of light during erasure.

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patent: 4918682 (1990-04-01), Finegan
patent: 4961123 (1990-10-01), Williams et al.
patent: 5079758 (1992-01-01), Clark

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