Tilt detection device, optical disc device, and tilt control met

Details Tilt detection device, optical disc device, and tilt control met Tilt detection device, optical disc device, and tilt control met

1999-08-23

2000-12-05

Hindi, Nabil

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4441, G11B 700

Patent

active

06157600&

ABSTRACT:
A tilt detection device detects an inclination (tilt angle) of the recording surface of an optical disc with respect to the optical axis of the light beam. The device has an optical head for directing a light beam onto the optical disc, a photo detector for receiving light reflected from the optical disc, and a tilt detector for detecting inclination of the recording surface of the optical disc with respect to the optical axis of the light beam by a signal output from the photo detector.

REFERENCES:
patent: 5898654 (1999-04-01), Shimada et al.
patent: 5963516 (1999-10-01), Hashimoto et al.
patent: 5978332 (1999-11-01), Itakura et al.
Patent Abstracts of Japan, vol. 014, No. 098 (P-1011), Feb. 22, 1990 & JP 01 302546 A (Sankyo Seiki Mfg. Co. Ltd.), Dec. 6, 1989.
Patent Abstracts of Japan, vol. 012, No. 413 (P-780), Nov. 2, 1988 & JP 63 149841 A (Hitachi Ltd.) Jun. 22, 1988.
Patent Abstracts of Japan, vol. 011, No. 298 (P-620), Sep. 26, 1987 & JP 62 089246 A (Sankyo Seiki Mfg. Co. Ltd.), Apr. 23, 1987.

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