Magneto-optical disk storage device having optical head applicab

Details Magneto-optical disk storage device having optical head applicab Magneto-optical disk storage device having optical head applicab

1991-07-19

1993-08-17

McElheny, Jr., Donald E.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4425, 369110, G11B 709

Patent

active

052375498

ABSTRACT:
In an optical head in a magneto-optical disk storage, an angle of a polarized light surface of a laser beam can be adjusted so that the strength of a tracking error signal can be maximized. Therefore, the optical head and the magneto-optical disk storage having the optical head is applicable to both p-polarized light type and s-polarized light type magneto-optical disks. Hereupon, the laser beam corresponding to the p-polarized light type magneto-optical disk transmits parallel to the grooves on the magneto-optical disk. On the other hand, the laser beam corresponding to the s-polarized light type magneto-optical disk transmits vertical to the grooves on the magneto-optical disk. Thus, according to the present invention, just one optical head can handle both types of magneto-optical disks.

REFERENCES:
patent: 4573149 (1986-02-01), Deguchi et al.
patent: 4672593 (1987-06-01), Ojima et al.
patent: 4721368 (1988-01-01), Deguchi et al.
patent: 5070494 (1991-12-01), Emoto et al.

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