System for detecting the tracking error in optical readers...

Details System for detecting the tracking error in optical readers... System for detecting the tracking error in optical readers...

G - Physics

11

B

352/32.2

G11B 7/00 (2006.01) G11B 7/09 (2006.01)

Patent

CA 1098621

SYSTEM FOR DETECTING THE TRACKING ERROR IN OPTICAL READERS AND RECORDERS Abstract of the Disclosure The invention relates to the detection of the tracking error of a track using a process of periodic excursion of a reading beam in a direction which forms an angle with the direction of exploration of the track. The detection system comprises a mirror deflection by a bar vibrating in a mode which is clamped to a base. Two plates of piezoelectric elements mechanically coupled with said vibrating bar are provided to excite the vibrating plate and to supply a reference signal in constant phase relation with the movement of the vibrating bar. -1-

293703

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