Magneto-optical head system for detection of error and informati

Details Magneto-optical head system for detection of error and informati Magneto-optical head system for detection of error and informati

1995-01-25

1995-09-26

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, 369112, 369 13, G11B 7095

Patent

active

054539633

ABSTRACT:
A magneto-optical head of the present invention has first and second diffraction gratings, for diffracting a reflection light reflected at a magneto-optical disk. Further, the system is provided with a photodetector for detecting an error signal and an information signal in accordance with the diffracted lights supplied from the diffraction gratings, respectively.

REFERENCES:
patent: 4894815 (1990-01-01), Yamanaka
patent: 4935911 (1990-06-01), Ohichida et al.
patent: 5015835 (1991-05-01), Ohuchida et al.
patent: 5062094 (1991-10-01), Hamada et al.
patent: 5101389 (1992-03-01), Ohuchida et al.
patent: 5115423 (1992-05-01), Maeda et al.
patent: 5231620 (1993-07-01), Ohuchida
"Compact Magneto-optical Disk Head using a Holographic Optical Element with Analyzer Function", Akitomo Ohba et al., SPIE vol. 1316, Optical Storage, 1990, pp. 159-166.

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