Title:
光ディスク記録再生装置
Document Type and Number:
Japanese Patent JP4727971
Kind Code:
B2
Abstract:
There is provided an optical disc recording/reproduction device capable of accurately performing the focus offset and spherical aberration correction even for an optical disc having no data recorded. The optical disc recording/reproduction device includes: an optical pickup having a spherical aberration corrector for correcting the spherical aberration of an objective lens; and various control units; and can generate a tracking error signal (TE) at least by a push-pull signal by the push-pull method. When an optical disc mounted is in an unrecorded state, the spherical aberration correction amount and the objective lens focus offset amount are adjusted according to the push-pull signal, predetermined data is recorded on the optical disc, and the reproduction signal obtained by the data is used to adjust the spherical aberration correction amount in the spherical aberration corrector of the optical pickup and the focus offset amount of the objective lens.
Inventors:
Kataoka
Motoyuki Suzuki
Fumio Isshiki
Yoshinori Ishikawa
Motoyuki Suzuki
Fumio Isshiki
Yoshinori Ishikawa
Application Number:
JP2004327470A
Publication Date:
July 20, 2011
Filing Date:
November 11, 2004
Export Citation:
Assignee:
株式会社日立製作所
株式会社日立エルジーデータストレージ
株式会社日立エルジーデータストレージ
International Classes:
G11B7/125; G11B7/007; G11B7/09; G11B7/24
Domestic Patent References:
| JP2003233917A | ||||
| JP2003123282A | ||||
| JP2006099928A | ||||
| JP2005100483A | ||||
| JP2005085311A |
Attorney, Agent or Firm:
Polaire Patent Business Corporation