Optical information recording medium

Details Optical information recording medium Optical information recording medium

1989-04-14

1992-02-18

Shoop, Jr., William M.

Dynamic information storage or retrieval

Storage medium structure

Layered

3692754, G11B 724

Patent

active

050900099

ABSTRACT:
An optical information recording medium comprising a light transmitting substrate, a light absorptive layer overlaying the substrate to absorb a laser beam and a light reflective layer overlaying the light absorptive layer, wherein an optical parameter represented by .rho.=n.sub.abs d.sub.abs /.lambda. where n.sub.abs is the real part of the complex refractive index of the light absorptive layer, d.sub.abs is the thickness of the light absorptive layer and .lambda. is the wavelength of a reading laser beam, is 0.05.ltoreq..rho..ltoreq.0.6, and the imaginary part k.sub.abs of the complex refractive index of the light absorptive layer is at most 0.3.

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