Disc recording and/or reproducing apparatus

Details Disc recording and/or reproducing apparatus Disc recording and/or reproducing apparatus

1997-09-15

1998-04-28

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 58, 369116, G11B 7095

Patent

active

057454515

ABSTRACT:
A disc recording and reproducing apparatus for use with a disc cartridge which includes an exterior indicator for indicating a reflectance of an optical disc housed in a cartridge body thereof, the disc recording and reproducing apparatus including a detector for detecting the exterior indicator and a setting control circuit for initially setting an output level of a laser light irradiated on the optical disc based on a detection output from the detector before beginning recording or reproducing operations.

REFERENCES:
patent: 4554599 (1985-11-01), Shiozaki
patent: 4932016 (1990-06-01), Yoshida et al.
patent: 4995029 (1991-02-01), Kobayashi et al.
patent: 5042020 (1991-08-01), Endo
patent: 5091815 (1992-02-01), Suzuki
patent: 5091901 (1992-02-01), Yamamoto et al.
patent: 5136569 (1992-08-01), Fennema et al.

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