Optical memory accessing and tracking apparatus with pickup and

Details Optical memory accessing and tracking apparatus with pickup and Optical memory accessing and tracking apparatus with pickup and

1986-02-28

1988-11-15

Cardillo, Raymond F.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 44, 369 41, G11B 2108, G11B 2110, G11B 709

Patent

active

047854391

ABSTRACT:
An optical recording/reproducing apparatus includes a pickup with a laser light source, an objective lens and lens drive coil for moving the optical axis of the laser beam transmitted through objective lens, a carriage drive voice-coil motor for moving a carriage with the pickup mounted thereon to move the laser beam transmitted through the objective lens, and tracking apparatus for operating both the lens drive coil and the carriage drive voice-coil motor. The tracking apparatus includes a lens servo stable detecting device for detecting that the laser beam from the objective lens has reached a desired track, apparatus for turning on a servo control loop with the lens drive coil in response to a tracking instruction, and apparatus for turning on a servo control loop with the carriage drive voice-coil motor in response to a detection output from the lens servo stable detecting device.

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patent: 4562562 (1985-12-01), Moriya et al.
patent: 4573087 (1986-02-01), Tezuka et al.
patent: 4615023 (1986-09-01), Inada et al.

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