RECORDING METHOD FOR OPTICAL DISK

摘要

PURPOSE:To quickly write information by superposing a recording beam on an erasing beam projected to the recording layer of a phase change type optical disk. CONSTITUTION:Laser beams from an erasing laser 4 and a writing laser 5 are converted to parallel rays of light through lenses and are led to an objective lens 8 by a prism 6 and a dichroic mirror 7 and are condensed on a recording layer 9 consisting of an InSb. The writing beam is superposed on the final position of the erasing beam and is projected to the recording layer 9. The same result as a conventional system where the beam interval between an erasing beam 1 and a writing beam 2 is kept 10mum is attached, and the waiting time is unnecessary for information writing to an optical disk to quickly write the information.