Optical disk device having optical phase compensator

Details Optical disk device having optical phase compensator Optical disk device having optical phase compensator

1996-02-08

1998-07-21

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 13, 369110, 369 4423, G11B 700

Patent

active

057843473

ABSTRACT:
An optical disk device having a light source for emitting light, focusing optics for radiating and focusing the light onto an optical recording medium, a photo-detection system for photoelectrically transforming reflected light from the optical recording medium, a reproduction circuit for reproducing information recorded on the optical recording medium by using an electric signal from the photo-detection system, phase control optics for changing the phase of the reflected light, a readout control circuit for controlling the quantity of the phase change of the phase control optics, and a learning control circuit for calculating the optimum value of the phase change quantity by monitoring the output signal of the reproduction circuit while changing the quantity of the phase change by the readout control circuit. Thus, information can be reproduced from a recording medium having high recording density without crosstalk.

REFERENCES:
patent: 4773053 (1988-09-01), Gottfried
patent: 4774615 (1988-09-01), Revelli et al.
patent: 5099470 (1992-03-01), Matsubayashi

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