Self-compensating focus system for a reflective video disc

Details Self-compensating focus system for a reflective video disc Self-compensating focus system for a reflective video disc

G - Physics

11

B

352/32.21

G11B 7/00 (2006.01) G11B 7/09 (2006.01) G11B 7/24 (2006.01) H04N 5/76 (2006.01)

Patent

CA 1147859

ABSTRACT OF THE DISCLOSURE An optical video playback device has an optical system for reading discs with a laser and further has a self- compensating focusing feature. This avoids the need for focus servos and the like to maintain proper conditions of focus, -1-

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