Title:
光ディスク装置
Document Type and Number:
Japanese Patent JP4203415
Kind Code:
B2
Abstract:
An optical disc device of the present invention includes spherical aberration changing means for changing spherical aberration occurring on a converging position of a light beam converged by a lens, an actuator for moving the spherical aberration changing means in a relatively precise manner, and an actuator for moving the spherical aberration changing means in a relatively rough manner. The optical disc device drives a second actuator and a third actuator based on a signal of spherical aberration detecting means and performs control so that spherical aberration is almost 0. The third actuator moves the spherical aberration changing means based on a direct current component included in a signal of the spherical aberration detecting means, and the second actuator moves the spherical aberration changing means based on an alternating current component included in the signal of the spherical aberration detecting means.
Inventors:
Yuichi Kuze
Kenji Fujiridge
Takashi Kishimoto
Shinichi Yamada
Katsuya Watanabe
Akihiro Yasuda
Shinichi Kadowaki
Akimasa Sano
Kenji Fujiridge
Takashi Kishimoto
Shinichi Yamada
Katsuya Watanabe
Akihiro Yasuda
Shinichi Kadowaki
Akimasa Sano
Application Number:
JP2003511237A
Publication Date:
January 07, 2009
Filing Date:
July 04, 2002
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G11B7/125; G11B7/085; G11B7/09; G11B7/131; G11B7/135; G11B7/1369; G11B7/1378; G11B7/1381; G11B7/1392; G11B7/00; G11B7/13; G11B7/1372
Domestic Patent References:
| JP2001507463A | ||||
| JP10021571A | ||||
| JP8077589A | ||||
| JP9017023A | ||||
| JP10188301A | ||||
| JP2001184675A | ||||
| JP2002157750A | ||||
| JP2002342952A |
Foreign References:
| WO2000079525A1 |
Attorney, Agent or Firm:
Seiji Okuda