Master optical disk recording apparatus

Details Master optical disk recording apparatus Master optical disk recording apparatus

1996-08-28

1998-04-21

Dinh, Tan

Dynamic information storage or retrieval

Simultaneous diverse types of storage or retrieval

369 16, G11B 1300

Patent

active

057425671

ABSTRACT:
A master optical disk recording apparatus forms a train of pits on a recording layer of a master optical disk by a laser beam which is emitted from the laser light source and is modulated by an acousto-optic modulator. An objective lens in the recording apparatus consists of a finite conjugate type lens and a convergence point on the acousto-optic modulation element where the laser beam is converged by a convergence lens is positioned outside of the focal point of the objective lens at the incidence side thereof.

REFERENCES:
patent: 5120136 (1992-06-01), Oakley
patent: 5278816 (1994-01-01), Russell
patent: 5523996 (1996-06-01), Kubota et al.
patent: 5544133 (1996-08-01), Sin

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