Method of optically recording and erasing information

Details Method of optically recording and erasing information Method of optically recording and erasing information

1987-05-04

1989-03-28

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

430 19, 430346, 430945, 430964, 3461351, G03C 172

Patent

active

048163856

ABSTRACT:
According to the method a rotating recording element 23 (FIG. 3) having a crystalline recording layer 28 of the composition Q.sub.x Sb.sub.y Te.sub.z, wherein Q=In, Ga; X=34-44 at. %; y=51-62 at. %; Z=2-9 at. %; is exposed to a pulsated laser light spot 29 (FIG. ) in which amorphous information bits are formed which are read by means of weak laser light 30 and which can be erased in real time during one revolution of the element 23 by means of a laser light erasing spot 33 (FIG. 4) and be returned to the crystalline state.

REFERENCES:
patent: 4637976 (1987-01-01), Terao et al.
patent: 4647944 (1987-03-01), Gravesteijn et al.

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