Optical record focus control system

Details Optical record focus control system Optical record focus control system

G - Physics

11

B

352/32.21, 88/94

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

Patent

CA 1049306

ABSTRACT OF THE DISCLOSURE A focus control system for an optical record carrier in which a light beam is reflected by a movable mirror through one objective lens and then directed to the carrier through another objective lens so that the light beam remains focused on the record carrier in spite of the fluctuation of the carrier.

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