WO2008117503A1 - Optical disk drive - Google Patents

Optical disk drive Download PDF

Info

Publication number
WO2008117503A1
WO2008117503A1 PCT/JP2007/075102 JP2007075102W WO2008117503A1 WO 2008117503 A1 WO2008117503 A1 WO 2008117503A1 JP 2007075102 W JP2007075102 W JP 2007075102W WO 2008117503 A1 WO2008117503 A1 WO 2008117503A1
Authority
WO
WIPO (PCT)
Prior art keywords
focus
optical disk
basis
pickup unit
optical pickup
Prior art date
Application number
PCT/JP2007/075102
Other languages
French (fr)
Japanese (ja)
Inventor
Hiroshi Hoshino
Akira Kitada
Original Assignee
Mitsubishi Electric Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Publication of WO2008117503A1 publication Critical patent/WO2008117503A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

An optical disk drive comprises a multilayer optical disk (1) having a first-layer and a second-layer recording surface, an optical pickup unit (3), a control circuit (4) for generating focus servo loop signals by performing gain adjustments on the recording surfaces on the basis of generated FE signals to maintain a state in which focus is adjusted, calculating sensitivity information of a focus actuator built into the optical pickup unit from gain adjustment information, and generating a focus jump signal according to a driving voltage value set on the basis of the sensitivity information, and a focus actuator driving circuit (5) for driving the optical pickup unit on the basis of the focus jump signal and the focus loop signals.
PCT/JP2007/075102 2007-03-27 2007-12-27 Optical disk drive WO2008117503A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007082130A JP2010134971A (en) 2007-03-27 2007-03-27 Optical disk drive
JP2007-082130 2007-03-27

Publications (1)

Publication Number Publication Date
WO2008117503A1 true WO2008117503A1 (en) 2008-10-02

Family

ID=39788245

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/075102 WO2008117503A1 (en) 2007-03-27 2007-12-27 Optical disk drive

Country Status (2)

Country Link
JP (1) JP2010134971A (en)
WO (1) WO2008117503A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1139664A (en) * 1997-07-15 1999-02-12 Pioneer Electron Corp Focus controller for multilayer optical recording medium
JP2004178735A (en) * 2002-11-28 2004-06-24 Alpine Electronics Inc Focus servo controller, method for controlling layer jump of multilayer optical disk and program for executing the method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1139664A (en) * 1997-07-15 1999-02-12 Pioneer Electron Corp Focus controller for multilayer optical recording medium
JP2004178735A (en) * 2002-11-28 2004-06-24 Alpine Electronics Inc Focus servo controller, method for controlling layer jump of multilayer optical disk and program for executing the method

Also Published As

Publication number Publication date
JP2010134971A (en) 2010-06-17

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