Optical focussing device

Details Optical focussing device Optical focussing device

G - Physics

11

B

352/32.21, 88/94

G11B 7/00 (2006.01) G11B 7/09 (2006.01) G11B 7/095 (2006.01)

Patent

CA 1183259

ABSTRACT: In order to improve the focussing of a radi- ation source at an object, for example for a "VLP" or "Compact Disk" system, a further control signal from an object-inclination detector is added to the focussing error signal, yielding improved control stability and smaller focussing errors.

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