Title:
RECORDER, AND SERVO CONTROL METHOD
Document Type and Number:
Japanese Patent JP2012243347
Kind Code:
A
Abstract:
To achieve stable focus servo control in an optical recording system using a pulse laser beam as a laser beam for recording.
A pulse laser beam for recording is irradiated, and separately from this, a first CW laser whose optical axis is inclined is irradiated for focus servo control. Since the optical axis of the first CW laser beam is inclined with respect to the pulse laser beam at this time, only reflected light of the first CW laser beam can selectively be received. This can effectively suppress influence given by the pulse laser beam during focus servo control, and consequently, focus servo control during recording can be performed in a stabler manner in an optical recording system using a pulse laser beam for a recording laser beam.
Inventors:
YAMAMOTO KENJI
NAKAO TAKASHI
NAKAO TAKASHI
Application Number:
JP2011112011A
Publication Date:
December 10, 2012
Filing Date:
May 19, 2011
Export Citation:
Assignee:
SONY CORP
International Classes:
G11B7/09; G11B7/007; G11B7/135
Attorney, Agent or Firm:
Atsuo Waki
Nobuo Suzuki
Hiroto Nakagawa
Nobuo Suzuki
Hiroto Nakagawa
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