Optical head carriage, tracking mechanism and displacement detecting mechanism
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United States of America Patent
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Jun 14, 1994
Grant Date -
N/A
app pub date -
Aug 12, 1992
filing date -
Aug 13, 1991
priority date (Note) -
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Abstract
An optical data recording and reproducing apparatus including an objective lens holder which holds an objective lens for converging laser light onto an optical disc, a tracking mechanism which drives the objective lens holder in a tracking direction of the optical disc, and a displacement detecting mechanism which detects the displacement of the objective lens holder effected by the tracking mechanism. The displacement detecting mechanism has photosensors which have light emitters and light receivers. The light receivers are located further from the optical disc than the light emitters. The photosensors are supported on a single sensor holder.
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