Lift control device and method for controlling a lifter in optic

Details Lift control device and method for controlling a lifter in optic Lift control device and method for controlling a lifter in optic

1996-11-12

1998-09-22

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 54, G11B 7095

Patent

active

058125043

ABSTRACT:
A lift control device with a tilt sensor for controlling a lifter which moves a pickup assembly vertically, includes a light mechanism for emitting a light beam to the surface of a disk, a converting unit for converting a light beam reflected from the surface of the disk into voltage signals, a tilt detecting unit for detecting a tilt between an axis of the light beam and an axis perpendicular to the surface of the disk according to the voltage signals from the converting unit and generating a tilt monitor signal based on the detection, and a driving unit for controlling the lifter and thereby vertically moving the pickup assembly according to the tilt monitor signal.

REFERENCES:
patent: 5027336 (1991-06-01), Sugiura
patent: 5182739 (1993-01-01), Kime et al.
patent: 5206848 (1993-04-01), Kusano et al.
patent: 5216649 (1993-06-01), Koike et al.
patent: 5345432 (1994-09-01), Kasahara et al.
patent: 5347503 (1994-09-01), Koyama et al.

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