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Tilt detector, optical disk device and tilt control method

A tilt detection, optical disc technology, applied in the direction of recording/reproducing by optical methods, optical discs, optical recording heads, etc., can solve the problems of complex optical devices, complex adjustment work, increase device space, etc., and achieve the effect of improving signal quality.

Inactive Publication Date: 2007-05-30
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of two optical systems, the optical head and the tilt sensor, makes the optical device more complex, increases the space occupied by the device, and leads to an increase in cost
In addition, it is necessary to adjust the optical axis of the two optical systems of the optical head and the tilt sensor, thus making the adjustment work more complicated, and an error easily occurs between the tilt sensor and the tilt (tilt angle) of the recording surface of the optical disc with respect to the optical axis of the light beam, making it difficult to accurately detect this inclination

Method used

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  • Tilt detector, optical disk device and tilt control method
  • Tilt detector, optical disk device and tilt control method
  • Tilt detector, optical disk device and tilt control method

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Embodiment Construction

[0193] A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a structural diagram of an optical disc device according to the present embodiment.

[0194] Reference numeral 101 among Fig. 1 is an optical disc; The numeral 102 is the optical head that the light beam is focused on the optical disc; The numeral 100 is the four-slit photodetector; The numeral 103 is the inclined platform; The numeral 104 is the signal calculation circuit; The numeral 105 represents the focusing control mechanism for controlling the focus position of the light spot on the surface of the optical disc; reference numeral 106 denotes a tracking control mechanism for controlling the position of the light spot with respect to the track; reference numeral 107 is a tilt sensor for irradiating light to detect the optical disc signal on the optical disc relative to the above-mentioned The inclination of the light beam optical axis of the light reflected ...

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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.

Description

[0001] The application number is CN99801607.1, the application date is 1999.7.13, the applicant is Matsushita Electric Industrial Co., Ltd., and the divisional application entitled "Tilt Detection Device, Optical Disk Device and Tilt Control Method". The above-mentioned earlier application claims the following priority rights: ①The earlier application date is 1998.9.14, and the earlier application number is JP 259904 / 1998, and ②The earlier application date is 1998.12.22, and the earlier application number is JP 364549 / 1998, The earlier filing countries for said priority are all Japan. The above-mentioned prior application is a PCT application, its international application number is PCT / JP99 / 03761, the international filing date is 1999.7.13, and it was published by the International Bureau under the international publication number WO00 / 16321 on 2000.3.23. The date when the PCT application entered the Chinese national phase was 2000.5.16. technical field [0002] The present ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/013G11B7/09G11B7/095G11B7/007
CPCG11B7/00745G11B7/00718G11B7/094G11B7/0956G11B7/0901G11B7/0943G11B7/24085G11B7/0938G11B20/10388G11B7/133G11B2220/2537
Inventor 中村敦史东海林卫石田隆
Owner PANASONIC CORP