Magneto-optical head capable of operation under inclination of t

Details Magneto-optical head capable of operation under inclination of t Magneto-optical head capable of operation under inclination of t

1998-03-23

2000-03-28

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

060440430

ABSTRACT:
A head unit is provided which is able to satisfactorily record/reproduce an information signal to and from a disk even if the disk can considerably be inclined (deflected) by a load applied by the head. The load applied from the magnetic head to the disk is set to be not larger than an upper limit which is calculated in accordance with a permissible range for incident angles of laser beams emitted from the optical head to the disc-shape recording medium, the thickness of the disc-shape recording medium and the radius of the disc-shape recording medium. As an alternative to this, the load is set to be not larger than an upper limit calculated in accordance with a permissible range of the amount of deviation between the point to which laser beams emitted from the optical head to the disc-shape recording medium and a point to which laser beams are converged, the thickness of the disc-shape recording medium and the radius of the disc-shape recording medium.

REFERENCES:
patent: 5233597 (1993-08-01), Nakayama et al.
patent: 5260921 (1993-11-01), Shibuya et al.
patent: 5305294 (1994-04-01), Kime et al.
patent: 5434831 (1995-07-01), Ishii et al.
patent: 5689478 (1997-11-01), Ishii et al.

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