Title:
光ピックアップ及び収差補正方法並びに光ピックアップ用プログラム、情報記録装置及び方法並びに情報記録用プログラム、情報再生装置及び方法並びに情報再生用プログラム、情報記録媒体
Document Type and Number:
Japanese Patent JP4579978
Kind Code:
B2
Abstract:
The invention is to provide an optical pickup capable of performing a track search operation accurately by reducing noise occurring in a focus servo system during the track search operation and also accurately recording/reproducing information to/from an optical disk. An optical pickup PU for emitting a light beam B to an optical disk DK in which recording tracks having a land/groove structure are formed and receiving reflection light of the emitted light beam B, has: a liquid crystal panel 3 for correcting astigmatism included in light beam B by a cause peculiar to an optical system as a component of the optical pickup PU in a state where tracking servo is on, and correcting the astigmatism and a fundamental track crossing noise in a state where the tracking servo is off, and a liquid crystal panel control unit 8 for operating a liquid crystal panel 3 while making a switch in accordance with the state of the tracking servo.
Inventors:
Takuma Yanagisawa
Application Number:
JP2007514506A
Publication Date:
November 10, 2010
Filing Date:
March 27, 2006
Export Citation:
Assignee:
Pioneer Corporation
International Classes:
G11B7/125; G11B7/09
Domestic Patent References:
| JP2000067453A | 2000-03-03 | |||
| JP2000348371A | 2000-12-15 |
Attorney, Agent or Firm:
Yasuo Ishikawa