Method for copying optical information

Details Method for copying optical information Method for copying optical information

1982-05-20

1985-07-16

Griffin, Donald A.

Recorders

Thermal recording

G01D 1534

Patent

active

045299919

ABSTRACT:
Methods for copying optical information are disclosed. The methods comprise the steps of disposing a master mask with a tracking signal or other information recorded therein over an optical memory material comprised of heat mode recording material which can be thermally altered in order to deform or remove the material upon the application of an energy beam, permitting recording on the altered recording material and irradiating the master disk with flash light for a period of 1 microsecond or less, or in the alternative, scanning with a laser beam focused to a spot having a diameter of at least 10 .mu.m on the master mask with the exposure time at each area of the optical memory material being preferably 1 microsecond or less.

REFERENCES:
patent: 3588439 (1971-06-01), Heller et al.
patent: 3610724 (1971-10-01), Frizzell
patent: 3911444 (1975-10-01), Lou et al.
patent: 3990084 (1976-11-01), Hamisch et al.
patent: 4000492 (1976-12-01), Willens
patent: 4334233 (1982-06-01), Murakami

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