Objective lens driving apparatus

Details Objective lens driving apparatus Objective lens driving apparatus

1989-03-09

1990-08-14

Arnold, Bruce Y.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

350247, 369 45, 369 4411, G02B 702

Patent

active

049482300

ABSTRACT:
An objective lens driving apparatus is provided which can restrain hysteresis phenomena in the relationship between semi-static displacements and forces in a focusing direction of the objective lens. The apparatus can also maintain the balance of force even when the objective lens is shifted in a focusing or tracking direction. Thus, the objective lens can be readily prevented from tilting. The apparatus also has a simplified configuration that can readily start up control operations in servomechanism. Thus, stable control characteristics of the apparatus can be achieved.

REFERENCES:
patent: 4592037 (1986-05-01), Ohnuki
patent: 4750164 (1988-06-01), Nose
patent: 4767187 (1988-08-01), Gijzen et al.
patent: 4782475 (1988-11-01), Chandler

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