Photochromic optical disk read/write apparatus which prevents de

Details Photochromic optical disk read/write apparatus which prevents de Photochromic optical disk read/write apparatus which prevents de

1991-02-11

1993-08-10

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4438, 369108, 3692752, G11B 7095

Patent

active

052355829

ABSTRACT:
A photochromic optical disk read/write apparatus is provided having, in addition to the beams of light for reading and writing, a tracking light beam which is used for tracking during the reading, erasing, and writing of information signals and a standby state so that deterioration in the recording medium quality can be lessened.

REFERENCES:
patent: 4703469 (1987-10-01), Pettigrew et al.
patent: 4829505 (1989-05-01), Boyd et al.
patent: 4974111 (1990-11-01), Platte et al.
patent: 5107483 (1992-04-01), Nakajima et al.
patent: 5113387 (1992-05-01), Goldsmith et al.

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