Optical recording medium, recording system and reproducing syste

Details Optical recording medium, recording system and reproducing syste Optical recording medium, recording system and reproducing syste

1992-05-15

1995-12-26

Willis, Davis L.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369286, 369283, 369272, B32B 302

Patent

active

054793947

ABSTRACT:
An optical recording medium includes in sequence a transparent substrate, a light-reflecting layer, a transparent intermediate layer and a light-absorbing layer. The light-reflecting layer, the transparent intermediate layer and the light-absorbing layer in combination constitute a multi-layer optical element showing a high reflectance with respect to a reproducing light beam having a wavelength .lambda..sub.r. The resultant high reflectance state in the non-recorded region provides a high contrast in comparison with a record pit when the high reflectance multi-layer optical element is destroyed, and also provides the record with an improved resistance to degradation due to irradiation with the reproducing light beam.

REFERENCES:
patent: 4189735 (1980-02-01), Bell et al.
patent: 4300143 (1981-11-01), Bell et al.
patent: 4305081 (1981-12-01), Spong
patent: 5021276 (1991-06-01), Kamezaki et al.
patent: 5091900 (1992-02-01), La Budde
patent: 5208088 (1993-05-01), Tominaga et al.
patent: 5260165 (1993-11-01), Satou et al.

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