Method and apparatus for erasing information from optical recording tape with a thermo-deforming layer

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.

Dependencies are inferred from the claim text.