WO2009041687A1 - Optical information reproduction device - Google Patents

Optical information reproduction device Download PDF

Info

Publication number
WO2009041687A1
WO2009041687A1 PCT/JP2008/067663 JP2008067663W WO2009041687A1 WO 2009041687 A1 WO2009041687 A1 WO 2009041687A1 JP 2008067663 W JP2008067663 W JP 2008067663W WO 2009041687 A1 WO2009041687 A1 WO 2009041687A1
Authority
WO
WIPO (PCT)
Prior art keywords
wobble
information track
wavefront aberration
track
optical information
Prior art date
Application number
PCT/JP2008/067663
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshiho Yanagita
Takeharu Shibatoko
Masashi Kubota
Original Assignee
Nec 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 Nec Corporation filed Critical Nec Corporation
Priority to JP2009534456A priority Critical patent/JP5218414B2/en
Publication of WO2009041687A1 publication Critical patent/WO2009041687A1/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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
    • G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

An optical disc has a spiral or coaxial information track. The information track of the optical disc has a wobble region formed to correspond to a modulation signal of predetermined data. Wavefront aberration change means demodulates predetermined data from the wobble signal contained in the reflected light from the wobble by adding to a beam, a wavefront aberration different from a wavefront aberration given to the beam when reproducing the information recorded on the information track so as to reduce a interference component from the track adjacent to the information track contained in the wobble signal.
PCT/JP2008/067663 2007-09-27 2008-09-29 Optical information reproduction device WO2009041687A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009534456A JP5218414B2 (en) 2007-09-27 2008-09-29 Optical information reproducing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-252185 2007-09-27
JP2007252185 2007-09-27

Publications (1)

Publication Number Publication Date
WO2009041687A1 true WO2009041687A1 (en) 2009-04-02

Family

ID=40511565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067663 WO2009041687A1 (en) 2007-09-27 2008-09-29 Optical information reproduction device

Country Status (2)

Country Link
JP (1) JP5218414B2 (en)
WO (1) WO2009041687A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05159326A (en) * 1991-12-09 1993-06-25 Matsushita Electric Ind Co Ltd Focus controller
JPH09128785A (en) * 1995-08-31 1997-05-16 Pioneer Electron Corp Optical pickup
JP2005135547A (en) * 2003-10-31 2005-05-26 Sanyo Electric Co Ltd Control method in optical disk device
JP2005251255A (en) * 2004-03-02 2005-09-15 Canon Inc Optical information recording and reproducing apparatus
JP2006519456A (en) * 2003-02-27 2006-08-24 エルジー エレクトロニクス インコーポレーテッド High density recording medium and method and apparatus for controlling data reproduction of high density recording medium
JP2007188563A (en) * 2006-01-11 2007-07-26 Funai Electric Co Ltd Optical disk drive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05159326A (en) * 1991-12-09 1993-06-25 Matsushita Electric Ind Co Ltd Focus controller
JPH09128785A (en) * 1995-08-31 1997-05-16 Pioneer Electron Corp Optical pickup
JP2006519456A (en) * 2003-02-27 2006-08-24 エルジー エレクトロニクス インコーポレーテッド High density recording medium and method and apparatus for controlling data reproduction of high density recording medium
JP2005135547A (en) * 2003-10-31 2005-05-26 Sanyo Electric Co Ltd Control method in optical disk device
JP2005251255A (en) * 2004-03-02 2005-09-15 Canon Inc Optical information recording and reproducing apparatus
JP2007188563A (en) * 2006-01-11 2007-07-26 Funai Electric Co Ltd Optical disk drive

Also Published As

Publication number Publication date
JP5218414B2 (en) 2013-06-26
JPWO2009041687A1 (en) 2011-01-27

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