Apparatus having a movable portion and a fixed portion for repro

Details Apparatus having a movable portion and a fixed portion for repro Apparatus having a movable portion and a fixed portion for repro

1988-12-23

1991-04-23

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4414, G11B 700

Patent

active

050105418

ABSTRACT:
An apparatus for reproducing data from an optical disk by a light beam includes a housing which is movable in the readial direction of the optical disk. The housing includes a directing element for directing the light beam onto the optical disk, a detector for detecting the light beam from the optical disk so as to generate an electrical signal corresponding to the detected light beam, a dividing element for dividing the electrical signal generated by the detector into a low frequency component and a high frequency component, and an amplifier for amplifying the high frequency component divided by the dividing element. The reproducing apparatus further includes a moving element for moving the housing in radial direction of the optical disk, an adjuster for adjusting a distance of the directing element with respect to the optical disk in response to the low frequency component divided by the dividing element, and a reproducing circuit for reproducing data from the optical disk in response to the amplifier.

REFERENCES:
patent: 4093961 (1978-06-01), Kanamaru
patent: 4114180 (1978-09-01), Kayanuma
patent: 4570251 (1986-02-01), Yokota et al.

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