WO2006073693A3 - Focus calibration in an optical drive - Google Patents

Focus calibration in an optical drive Download PDF

Info

Publication number
WO2006073693A3
WO2006073693A3 PCT/US2005/044923 US2005044923W WO2006073693A3 WO 2006073693 A3 WO2006073693 A3 WO 2006073693A3 US 2005044923 W US2005044923 W US 2005044923W WO 2006073693 A3 WO2006073693 A3 WO 2006073693A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical drive
focus calibration
drive signal
drive
disc
Prior art date
Application number
PCT/US2005/044923
Other languages
French (fr)
Other versions
WO2006073693A2 (en
Inventor
Brocklin Andrew L Van
D Mitchel Hanks
Gregory J Lipinski
Original Assignee
Hewlett Packard Development Co
Brocklin Andrew L Van
D Mitchel Hanks
Gregory J Lipinski
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 Hewlett Packard Development Co, Brocklin Andrew L Van, D Mitchel Hanks, Gregory J Lipinski filed Critical Hewlett Packard Development Co
Priority to DE602005017669T priority Critical patent/DE602005017669D1/en
Priority to EP05853763A priority patent/EP1839298B1/en
Publication of WO2006073693A2 publication Critical patent/WO2006073693A2/en
Publication of WO2006073693A3 publication Critical patent/WO2006073693A3/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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

Focus calibration in an optical drive (100). Optics (214) are moved with respect to a disc (202) in the optical drive (100). A first interface of the disc (202) is optically detected at a first distance (430), and a first drive signal value (431) is detected at the first interface. A drive signal change 451 is determined using a second drive signal value (441) at a second distance (440). A gain (175) is determined using the drive signal change (451) and a thickness (450) associated with the first and second distances (430, 440).
PCT/US2005/044923 2005-01-04 2005-12-12 Focus calibration in an optical drive WO2006073693A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE602005017669T DE602005017669D1 (en) 2005-01-04 2005-12-12 FOCUS CALIBRATION IN AN OPTICAL DRIVE
EP05853763A EP1839298B1 (en) 2005-01-04 2005-12-12 Focus calibration in an optical drive

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/028,739 2005-01-04
US11/028,739 US7514661B2 (en) 2005-01-04 2005-01-04 Focus calibration in an optical drive

Publications (2)

Publication Number Publication Date
WO2006073693A2 WO2006073693A2 (en) 2006-07-13
WO2006073693A3 true WO2006073693A3 (en) 2006-09-21

Family

ID=36293507

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/044923 WO2006073693A2 (en) 2005-01-04 2005-12-12 Focus calibration in an optical drive

Country Status (6)

Country Link
US (1) US7514661B2 (en)
EP (1) EP1839298B1 (en)
CN (1) CN101138028A (en)
DE (1) DE602005017669D1 (en)
TW (1) TW200629257A (en)
WO (1) WO2006073693A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7768878B2 (en) * 2005-07-12 2010-08-03 Hewlett-Packard Development Company, L.P. Actuator calibration using a focus error signal
US7636280B2 (en) * 2005-09-30 2009-12-22 Hewlett-Packard Development Company, L.P. Calibration of lens position in an optical disc drive
TW201003644A (en) * 2008-07-14 2010-01-16 Quanta Storage Inc Reading method and device for optical disk drives
TW201103012A (en) * 2009-07-02 2011-01-16 Quanta Storage Inc Method for calibrating actuator
RU2544278C2 (en) * 2012-12-26 2015-03-20 Дмитрий Васильевич Паненко Optical adjustment table for heavy-weight devices
JP6336718B2 (en) * 2013-07-01 2018-06-06 株式会社ミツトヨ Autofocus device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020131346A1 (en) * 2001-01-25 2002-09-19 Turner Christopher J. System and method for dynamically re-calibrating an optical disc drive
EP1308938A2 (en) * 2001-10-31 2003-05-07 Yamaha Corporation Apparatus for recording data and visible images on an optical disc

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06150333A (en) 1992-11-12 1994-05-31 Matsushita Electric Ind Co Ltd Optical information recording and reproducing device
US5499231A (en) 1994-11-15 1996-03-12 International Business Machines Corporation Optical disk drive with multiple data layer disk and system for focusing the optical beam
US5831952A (en) 1995-07-27 1998-11-03 Matsushita Electric Industrial Co., Ltd. Optical disk thickness discriminating apparatus
JP2001006264A (en) 1999-06-22 2001-01-12 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing device
JP2002279654A (en) * 2001-01-11 2002-09-27 Sony Computer Entertainment Inc Optical disk apparatus and method for controlling movement of objective lens
US6948162B2 (en) * 2002-01-09 2005-09-20 Sun Microsystems, Inc. Enhanced parallelism in trace scheduling by using renaming
JP2003233912A (en) * 2002-02-07 2003-08-22 Sharp Corp Optical disk unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020131346A1 (en) * 2001-01-25 2002-09-19 Turner Christopher J. System and method for dynamically re-calibrating an optical disc drive
EP1308938A2 (en) * 2001-10-31 2003-05-07 Yamaha Corporation Apparatus for recording data and visible images on an optical disc

Also Published As

Publication number Publication date
TW200629257A (en) 2006-08-16
EP1839298A2 (en) 2007-10-03
WO2006073693A2 (en) 2006-07-13
CN101138028A (en) 2008-03-05
US20060146664A1 (en) 2006-07-06
US7514661B2 (en) 2009-04-07
DE602005017669D1 (en) 2009-12-24
EP1839298B1 (en) 2009-11-11

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