Ablative optical recording medium

Details Ablative optical recording medium Ablative optical recording medium

1976-03-19

1977-05-10

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

8 25R, 346 76L, 427 53, 428913, G01D 1534

Patent

active

040231852

ABSTRACT:
An ablative recording medium comprises a substrate coated with a light reflecting coating which in turn is coated with a light absorptive layer of 4-phenylazo-1-naphthylamine formed by evaporation of Sudan Black B dyestuff. During recording, portions of the organic coating are ablated, or vaporized, by a modulated focussed light beam, thereby exposing portions of the reflective layer and recording video information as a reflective-antireflective pattern.

REFERENCES:
patent: 3651281 (1972-03-01), Becker
patent: 3720784 (1973-03-01), Maydan
patent: 3747117 (1973-07-01), Fechter
patent: 3978247 (1976-08-01), Braudy

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