Magneto-optical head capable of separating beams for reading rec

Details Magneto-optical head capable of separating beams for reading rec Magneto-optical head capable of separating beams for reading rec

1988-01-25

1990-08-21

Faber, Alan

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 13, 369110, 369112, 360114, G11B 709, G11B 713

Patent

active

049512749

ABSTRACT:
A magneto-optical head for reading information from a recording medium, the head having a laser-based optical system that comprises two light paths, a first path from the source to and continuing through or reflecting from medium and a second path in a different direction which directs light from the medium to a detector. The second path includes a dual prism multiplying element (Wollaston prism) for dividing the reflected beam into three distinctly oriented beams, and a multi division photodetector for detecting a servo signal by the astigmatism method and an information signal by a differential polarization method.

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