METHOD OF OPTICALLY RECORDING AND ERASING INFORMATION

摘要

Method of optically recording and erasing information. According to the method a rotating recording element 23 (Fig. 3) having a crystalline recording layer 28 of the composition QxSbyTe , 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. 4) 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.