Optical information recording and reproducing apparatus

Details Optical information recording and reproducing apparatus Optical information recording and reproducing apparatus

G - Physics

11

B

352/53.7

G11B 7/00 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01)

Patent

CA 1301925

- 19 - ABSTRACT OF THE DISCLOSURE An optical information recording and reproducing apparatus for an optical information record medium on which a plurality of tracks are arranged substantially in parallel, comprises a light source, a first optical system for forming a small spot on the record medium by converging a light beam from the light source, a second optical system for obtaining the light beam from the record medium, a detecting device for receiving the light beam obtained by the second optical system to output a tracking signal, a vibrating device for vibrating the spot relatively to the record medium in a direction intersecting the extension of the track, a control device for effecting a tracking control with respect to the track, and a selecting device for selectively actuating the vibrating device and the control device in accordance with the tracking signal from said detecting device.

537486

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