Optical recording and reproducing system having an accurate high

Details Optical recording and reproducing system having an accurate high Optical recording and reproducing system having an accurate high

1989-08-07

1991-12-31

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369124, 369 4434, 369 33, 360 7702, 360 7805, G11B 700

Patent

active

050777165

ABSTRACT:
An optical recording and reproducing system having an accurate high-speed optical head positioning apparatus. In one embodiment, a positive acceleration is applied to the optical head until the optical head has moved half the distance to a target track. Thereafter, a negative acceleration is applied to the optical head to decelerate the optical head until the optical head arrives at the target track. Feedback control is not used while the optical head is moving, thus eliminating a delay in response time due to a limited servo band upon the transition from the positive acceleration to the negative acceleration.

REFERENCES:
patent: 4481613 (1984-11-01), Yokota
patent: 4562562 (1985-12-01), Moriya et al.
patent: 4607956 (1986-08-01), Ishihara et al.
patent: 4710908 (1987-12-01), Ohshima et al.
patent: 4745587 (1988-05-01), Maeda et al.
patent: 4745588 (1988-05-01), Yoshikawa et al.
patent: 4866687 (1989-09-01), Kasai et al.

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