Optical lens vibration control for optical information recording

Details Optical lens vibration control for optical information recording Optical lens vibration control for optical information recording

1986-06-10

1988-08-16

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 33, 369 41, 369 44, 369 46, G11B 7085, G11B 2108, G11B 2110

Patent

active

047649119

ABSTRACT:
An optical information recording and/or reproducing apparatus is provided with a finely moving device. The movement of an optical device converging and radiating a light beam onto an optical information recording medium, is controlled to be able to finely move the position of a spot light radiated onto the recording medium. A coarsely moving device moves an optical head provided with the finely moving device and an optical system. A track crossing velocity monitoring device detects whether the track crossing velocity at which the spot light radiated onto the recording medium crosses the tracks of the recording medium is below a predetermined value. After a coarse access close to an objective track is made by the coarsely moving device, when the track crossing velocity is below the predetermined value, the clamping applied to the optical device at the time of the coarse access will be released.

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patent: 4268745 (1981-05-01), Okano
patent: 4330880 (1982-05-01), Van Dijk
patent: 4432082 (1984-02-01), Hsieh et al.
patent: 4562562 (1985-12-01), Moriya et al.
patent: 4607358 (1986-08-01), Maeda et al.
patent: 4615023 (1986-09-01), Inada et al.

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