Laser recording monitoring system

Details Laser recording monitoring system Laser recording monitoring system

1980-12-08

1982-10-19

Rubinson, G. Z.

Recorders

Thermal recording

369 54, 358342, G01D 1514

Patent

active

043553184

ABSTRACT:
A heat-mode recording medium has a recording layer the optical density of which is normally high and is reduced significantly by fusing to permit light to pass therethrough when exposed to a laser beam. A laser beam modulated in accordance with data signals is caused to scan the heat-mode recording medium to record information as a pattern of the points made transparent. Errors in the recorded information resulting from any pin hole in the recording medium which permits light to pass therethrough or any foreign material in the recording medium which prevents the recording layer from being fused completely are revealed by a photo-electric converter which receives light passing through the recording medium and outputs electric signals in accordance with the light received and a comparator which compares the electric signals with the data signals and outputs an electric signal when they differ from each other.

REFERENCES:
patent: 3452331 (1969-06-01), Barlett
patent: 4125842 (1978-11-01), Chnishi et al.
patent: 4225873 (1980-09-01), Winslow
Soviet Journal of Optical Technology, Mar. 1979, pp. 180-181, Valis, "Laser Apparatus for Recording the Transparencies of Read-Only Memories."

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