Optical recording medium optical recording method, and optical r

Details Optical recording medium optical recording method, and optical r Optical recording medium optical recording method, and optical r

1990-02-05

1992-03-31

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428913, 430945, 369288, 346 76L, 3461351, B32B 302

Patent

active

051007118

ABSTRACT:
Features of the present invention are connected with an optical recording medium which comprises a substrate, a heat-senstive color-developing layer containing a basic dye and an organic developer, and a light-absorbing layer containing a near infrared absorbent, the aforesaid layers being superposed upon the substrate, a reflectance at the dominant wave length of a laser beam on the surface of the recording medium being from 15 to 65%; a method for recording by irradiating the optical recording medium with a laser beam condensed by a condenser having a focal length of 0.5 mm or more and a numerical aperture (N.A) of 0.1 to 0.5; and a device for use in the above-mentioned method.

REFERENCES:
patent: 4853361 (1989-08-01), Satake et al.
patent: 4853362 (1989-08-01), Satake et al.
patent: 4853363 (1989-08-01), Satake et al.
patent: 4882310 (1989-11-01), Arai et al.

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