Optical recording apparatus

Details Optical recording apparatus Optical recording apparatus

G - Physics

11

B

352/32

G11B 7/00 (2006.01) G11B 7/09 (2006.01) G11B 7/125 (2006.01) G11B 21/10 (2006.01)

Patent

CA 1182911

- 1 - Abstract An optical recording apparatus employs a first light spot for recording predetermined information along a guide groove provided in a recording medium. Two second light spots and two third light spots are arranged along the guide groove in such a manner as to deviate from the center line of the groove. The second light spots are arranged in an area with no information recorded therein, while the third light spots are arranged in an area with information recorded therein. The position of the first light spot, i.e. tracking of the groove, is controlled on the basis of the difference between the quantities of reflected light from the second light spots and the difference between the quantities of reflected light from the third light spots. The result is improved tracking precision.

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