Optical disc players

Details Optical disc players Optical disc players

G - Physics

11

B

352/32.2

G11B 7/095 (2006.01) G11B 7/09 (2006.01) G11B 7/12 (2006.01) G11B 7/135 (2006.01)

Patent

CA 1212765

OPTICAL DISC PLAYERS ABSTRACT OF THE DISCLOSURE 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.

446806

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