Pick-up for selectively reading and writing an optical recording

Details Pick-up for selectively reading and writing an optical recording Pick-up for selectively reading and writing an optical recording

1993-06-21

1994-06-28

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, 3692752, 369120, 360114, G11B 700

Patent

active

053253507

ABSTRACT:
The beam of light reflected from an optico-magnetic recorded medium is reflected by an optical pick-up onto one optical or another in accordance with the direction that the beam's plane of polarization is rotated in. A data signal is obtained from the difference in the photovoltages of the two photodetectors.

REFERENCES:
patent: 4985881 (1991-01-01), Saito et al.
patent: 5014253 (1991-05-01), Morimoto et al.
patent: 5031162 (1991-07-01), Morimoto et al.
patent: 5202874 (1993-04-01), Zucker et al.
patent: 5251196 (1993-10-01), Morimoto et al.

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