Heat mode recording medium and recording substance

Abstract

Abstract PURPOSE:To prevent the light carrying the auxiliary signal from being turned into the optical noise which carries the picture signal, by recording the auxiliary signal previously and in the red-written state. CONSTITUTION:In case the laser beam has a low optical output, the material of the light absorption layer 2B of a high fusing point at the laser irradiation part (recording part) is not set under the fluid state. And only the material of the recording layer 2A of a low fusing pint is fused, and the small ball 5 formed becomes small extremely with residual of the layer 2B. When the white light is irradiated to the recording part, the recording part seems red (red-written phenomenon) since the layer 2B of SnS transmits well the light of the long wave side. Utilizing this phenomenon, the auxiliary signal of the tracking signal or the like is recorded in the red-written state. In this case, the tracking signal affects the picture signal to produce no noise by varying the spectral properties of both signals even through the both signals is piled on each other.

Inventors

• 👤 Akio Miyauchi

Bibliographic Details