Optical information recording and reproducing apparatus and meth

Details Optical information recording and reproducing apparatus and meth Optical information recording and reproducing apparatus and meth

1992-09-01

1993-07-27

LaRoche, Eugene R.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369178, 369181, 369198, 369 4426, G11B 1714

Patent

active

052316173

ABSTRACT:
The present invention provides a large-capacity stack type optical disk unit capable of information recording and reproducing operation at a high speed and an optical information recording and reproducing apparatus for recording/reproducing information onto/from the stack type optical disk unit. The optical information recording and reproducing apparatus comprises a stack type optical disk unit having N recording faces, the sector starting position on the respective recording faces are displaced by a sector as unit from one face to another, one stationary optical units including a laser light source, a collimator, a reflector and a detector for a reflected beam from the recording faces, N sets of focusing units each for focusing a collimated beam onto respective recording faces, a beam distribution unit for distributing the collimated beam to the focusing units, and a servo unit for focussing outputs from the focusing units onto tracks of the recording faces and for performing tracking. Owing to the above described configuration, information can be consecutively recorded onto/reproduced from a desired track sector without an extra disk rotation waiting time when recording/reproducing operation is switched from a recording face to an adjacent recording face of the stack type optical disk unit.

REFERENCES:
patent: 4387452 (1983-06-01), Bricot et al.
patent: 4674076 (1987-06-01), Hsieh et al.
patent: 4807063 (1989-02-01), Moteki
patent: 4879704 (1989-11-01), Takagi et al.
patent: 4888751 (1989-12-01), Yoshimaru et al.
patent: 4896228 (1990-01-01), Amakasu et al.

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