WO2007046054A3 - A control method with single period learning for an optical drive - Google Patents

A control method with single period learning for an optical drive Download PDF

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Publication number
WO2007046054A3
WO2007046054A3 PCT/IB2006/053799 IB2006053799W WO2007046054A3 WO 2007046054 A3 WO2007046054 A3 WO 2007046054A3 IB 2006053799 W IB2006053799 W IB 2006053799W WO 2007046054 A3 WO2007046054 A3 WO 2007046054A3
Authority
WO
WIPO (PCT)
Prior art keywords
error signal
lens system
actuator
information carrier
optical drive
Prior art date
Application number
PCT/IB2006/053799
Other languages
French (fr)
Other versions
WO2007046054A2 (en
Inventor
Der Aa Michael A H Van
Juil Lee
Original Assignee
Koninkl Philips Electronics Nv
Der Aa Michael A H Van
Juil Lee
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 Koninkl Philips Electronics Nv, Der Aa Michael A H Van, Juil Lee filed Critical Koninkl Philips Electronics Nv
Publication of WO2007046054A2 publication Critical patent/WO2007046054A2/en
Publication of WO2007046054A3 publication Critical patent/WO2007046054A3/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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

The invention relates to a method for reading and/or writing information from/to an optical information carrier, particularly a high density near field optical information carrier. Initially, there is generated a radiation beam, e.g. a laser beam, which is directed onto the information carrier by a lens system, where a part of the lens system is moveable by an actuator. Subsequently, there is generated an error signal, such as a gap error signal (GES), for indicating a difference between a desired position and an actual position. By a closed loop control the actuator controls the part of the lens system based on the error signal. The control includes the sub-steps of: storing one period of the error signal (GES) and using the stored period of the error signal as a feedforward signal to control the actuator, which effectively cancels periodic disturbances. The invention dramatically reduces the position error in an optical drive, thereby enabling a stable free working distance (FWD) at the order of nano-meters.
PCT/IB2006/053799 2005-10-19 2006-10-16 A control method with single period learning for an optical drive WO2007046054A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05109745 2005-10-19
EP05109745.9 2005-10-19

Publications (2)

Publication Number Publication Date
WO2007046054A2 WO2007046054A2 (en) 2007-04-26
WO2007046054A3 true WO2007046054A3 (en) 2007-07-12

Family

ID=37781732

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/053799 WO2007046054A2 (en) 2005-10-19 2006-10-16 A control method with single period learning for an optical drive

Country Status (2)

Country Link
TW (1) TW200805318A (en)
WO (1) WO2007046054A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113325785B (en) * 2021-06-11 2022-08-12 哈尔滨工业大学 Position repetition control method based on data storage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5467406A (en) * 1977-11-08 1979-05-30 Nec Corp Positioning controller
JPH03127337A (en) * 1989-10-12 1991-05-30 Fujitsu Ltd Positioner servo control circuit for optical disk device
US20010030828A1 (en) * 2000-03-30 2001-10-18 Fujitsu Limited Head position control method, control device for disk device and disk device
JP2003067952A (en) * 2001-08-27 2003-03-07 Ricoh Co Ltd Optical disk apparatus and tracking control method for optical disk
WO2005022520A2 (en) * 2003-09-03 2005-03-10 Koninklijke Philips Elecronics N.V. Disc drive apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5467406A (en) * 1977-11-08 1979-05-30 Nec Corp Positioning controller
JPH03127337A (en) * 1989-10-12 1991-05-30 Fujitsu Ltd Positioner servo control circuit for optical disk device
US20010030828A1 (en) * 2000-03-30 2001-10-18 Fujitsu Limited Head position control method, control device for disk device and disk device
JP2003067952A (en) * 2001-08-27 2003-03-07 Ricoh Co Ltd Optical disk apparatus and tracking control method for optical disk
WO2005022520A2 (en) * 2003-09-03 2005-03-10 Koninklijke Philips Elecronics N.V. Disc drive apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JU.-I. LEE ET AL.: "Development of an Air Gap Servo System for High Data Transfer Rate Near Field Optical Recording", JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 44, no. 5B, 24 May 2005 (2005-05-24), pages 3423 - 3426, XP002423542 *
TADASHI INOUE ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "PRACTICAL REPETITIVE CONTROL SYSTEM DESIGN", PROCEEDINGS OF THE CONFERENCE ON DECISION AND CONTROL. HONOLULU, DEC. 5 - 7, 1990, NEW YORK, IEEE, US, vol. VOL. 3 CONF. 29, 5 December 1990 (1990-12-05), pages 1673 - 1678, XP000147328 *

Also Published As

Publication number Publication date
TW200805318A (en) 2008-01-16
WO2007046054A2 (en) 2007-04-26

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