Optical head apparatus for maintaining a constant angle between

Details Optical head apparatus for maintaining a constant angle between Optical head apparatus for maintaining a constant angle between

1992-06-12

1994-04-05

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4415, 369 4422, G11B 700

Patent

active

053011759

ABSTRACT:
An optical head apparatus contains two pairs of coils. These coils are paired off in one of a first direction and second direction perpendicular to the first direction and are energized independently of one another. They drive an object lens along its optical axis, while simultaneously allowing the optical axis and the recording surface of a disk to form an angle of 90.degree..

REFERENCES:
patent: 4661943 (1987-04-01), Ikeda
patent: 4674078 (1987-06-01), Otsuka et al.
patent: 4942562 (1990-07-01), Suzuki
patent: 5056075 (1991-10-01), Murata et al.
patent: 5182739 (1993-01-01), Kime et al.

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