Optical focus position control in an optical memory system

Details Optical focus position control in an optical memory system Optical focus position control in an optical memory system

1984-04-16

1987-04-14

McElheny, Jr., Donald

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, G11B 712

Patent

active

046583904

ABSTRACT:
An optical focus position control system in an opto-magnetic disc apparatus includes a tracking control device and a focus control device. The tracking control device includes an intermediate holder, a tracking parallel spring which connects an cylindrical objective lens support to the intermediate holder while ensuring movement of the cylindrical objective lens support in the radial direction of the opto-magnetic disc, and a tracking drive mechanism to shift the cylindrical objective lens support in the radial direction within the intermediate holder. The focus control device includes a stationary holder, a focusing parallel spring which connects the intermediate holder to the stationary holder while ensuring movement of the intermediate holder in the direction of the optical axis of laser beams emitted through the optical focus position control system, and a focusing drive mechanism to shift the intermediate holder in the optical axis direction within the stationary holder.

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patent: 4479051 (1984-10-01), Musha
patent: 4481613 (1984-11-01), Yokota
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