| 摘要 |
<p>A method and apparatus for erasing information from optical recording tape having a thermo-deforming layer 2 is disclosed in which information is recorded by forming bumps 4 with residual stress deformed viscoelastically by way of heating portions of said layer 2, and is erased by making said bumps 4 planar by re-heating the bumps 4 in order to remove the residual stress. The information is erased by forming a focal line Lf on the tape T using optical elements 11 and 12 for emitting and condensing light of a certain thermal energy, and re-heating the thermo-deforming layer 2 including the bumps 4 on the focal line Lf. The information is effectively erased by means of an erasing optical device which forms a focal line Lf, and information is recorded without noise, during the erasing and recording operation of an optical recording tape having a thermo-deforming layer. Lower power consumption is achieved by the efficient use of light. <IMAGE></p> |
