Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1989-03-29
1991-02-05
Ro, Bentsu
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 44160, 369119, 350247, G02B 702, G11B 700
Patent
active
049911619
ABSTRACT:
An apparatus for supporting an objective lens projecting a light beam upon an optical record disc having a data track recorded therein, movably in a focusing direction parallel to an optical axis of the objective lens as well as in a tracking direction perpendicular both to the optical axis and to the track in order to effect focusing and tracking servo controls, including four resilient wires arranged between a lens holder and a stationary base member, said resilient wires being not in parallel with each other. Two resilient wires provided nearer to the optical record disc are arranged such that extensions of these wires intersect with each other at a first point to make a first apex angle and the remaining two wires are arranged such that extensions of these wires intersect with each other at a second point to form a second apex angle, the first and second points being aligned in the focusing direction and the first apex angle being smaller than the second apex angle.
REFERENCES:
patent: 4592037 (1986-05-01), Ohnuki
patent: 4646283 (1987-02-01), Ito et al.
patent: 4750164 (1988-06-01), Nose
patent: 4782475 (1988-11-01), Chandler
patent: 4842392 (1989-06-01), Nakamura et al.
patent: 4878214 (1989-10-01), Hinotani
Ikari Ichiro
Ikegame Tetsuo
Olympus Optical Co,. Ltd.
Ro Bentsu
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