Preheat-Aided Laser Recording

Mark W. Goldberg

doi:10.1117/12.958072

12 February 1980 Preheat-Aided Laser Recording

Mark W. Goldberg

Proceedings Volume 0200, Laser Recording and Information Handling; (1980) https://doi.org/10.1117/12.958072
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

A new concept is presented involving the use of dynamic preheating to aid in the laser recording of information on thin metal films. Two beams are used to record a single track of holes in the film. A conventional modulated write beam is preceded by another unmodulated preheat beam. The energy supplied by the preheat beam raises the temperature of the metal film to just below the hole formation threshold. The write beam need only supply the additional energy necessary to actually form the hole. The results of analytic and experimental studies of the preheat aided write process are presented. A proposed application involving multi-channel semiconductor laser recording is described. The use of preheat allows a 50% reduction in the power required of the semiconductor laser and provides for a 55% improvement in the packing density of the written information.

Citation Download Citation

Mark W. Goldberg "Preheat-Aided Laser Recording", Proc. SPIE 0200, Laser Recording and Information Handling, (12 February 1980); https://doi.org/10.1117/12.958072

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