Optical disc player with tilt correction

Details Optical disc player with tilt correction Optical disc player with tilt correction

1984-02-08

1986-08-26

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 46, G11B 700

Patent

active

046086803

ABSTRACT:
An optical disc player operative to cause a light beam to impinge through an object lens on a recording surface of a record disc and to receive a reflected light beam coming through the object lens from the recording surface by photodetecting means so as to reproduce an information signal recorded on the record disc, wherein a first signal varying in response to positional movements of the object lens and a second signal varying in response to variations of a position on the photodetecting means where the reflected light beam is received which result from the positional movements of the object lens are mixed with each other to produce a mixed signal with which an inclination of an optical axis of the light beam incident upon the recording surface with respect to a normal line at a location where the light beam impinges on the recording surface is detected.

REFERENCES:
patent: 4502134 (1985-02-01), Kondo et al.

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