Optical recording medium, optical recording method, and optical

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

1991-12-20

1993-04-06

Fields, Carolyn E.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369283, 428 64, G11B 700

Patent

active

052009475

ABSTRACT:
Features of the present invention are connected with an optical recording medium which comprises a substrate, a heat-sensitive 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.

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