Photodetecting system for a magneto-optical disk head system

Details Photodetecting system for a magneto-optical disk head system Photodetecting system for a magneto-optical disk head system

1992-02-19

1995-06-20

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4414, 2502015, 2502141, 357446, G11B 700

Patent

active

054266262

ABSTRACT:
A magneto-optical disk head system includes a laser light source for emitting a laser light, an optical system for focusing the laser light emitted from the laser light source on a magneto-optical disk, an optical separating system for separating a reflection light of the laser light reflected at the magneto-optical disk to a plurality of polarized lights having orthogonal polarization directions, and a photodetector for detecting the polarized lights. The photodetector includes a plurality of photodetecting segments isolated from each other. An information signal of the magneto-optical disk is detected through cathodes of the photodetecting segments, while focusing and tracking error signals thereof are detected through anodes of the photodetecting segments.

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patent: 5097307 (1992-03-01), Bierhoff
patent: 5789297 (1993-02-01), Ahlgren

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