TW200606873A - Optical reader/writer with dedicated focus tracking beam - Google Patents

Optical reader/writer with dedicated focus tracking beam

Info

Publication number
TW200606873A
TW200606873A TW094114430A TW94114430A TW200606873A TW 200606873 A TW200606873 A TW 200606873A TW 094114430 A TW094114430 A TW 094114430A TW 94114430 A TW94114430 A TW 94114430A TW 200606873 A TW200606873 A TW 200606873A
Authority
TW
Taiwan
Prior art keywords
beams
focus tracking
wavelength
writer
optical reader
Prior art date
Application number
TW094114430A
Other languages
English (en)
Inventor
Christopher Busch
Der Lee Alexander Marc Van
Original Assignee
Koninkl Philips Electronics Nv
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 filed Critical Koninkl Philips Electronics Nv
Publication of TW200606873A publication Critical patent/TW200606873A/zh

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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G11B7/1275—Two or more lasers having different wavelengths
    • 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
    • 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
    • G11B7/0901—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 for track following only
    • G11B7/0903—Multi-beam tracking systems
    • 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
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • 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

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
TW094114430A 2004-05-04 2005-05-04 Optical reader/writer with dedicated focus tracking beam TW200606873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04101910 2004-05-04

Publications (1)

Publication Number Publication Date
TW200606873A true TW200606873A (en) 2006-02-16

Family

ID=34965721

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094114430A TW200606873A (en) 2004-05-04 2005-05-04 Optical reader/writer with dedicated focus tracking beam

Country Status (8)

Country Link
US (1) US20080239897A1 (zh)
EP (1) EP1745476B1 (zh)
KR (1) KR20070012848A (zh)
CN (1) CN1950898A (zh)
AT (1) ATE390686T1 (zh)
DE (1) DE602005005665T2 (zh)
TW (1) TW200606873A (zh)
WO (1) WO2005106864A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008061030A1 (en) * 2006-11-10 2008-05-22 Hewlett-Packard Development Company, L.P. Optical data recording and imaging on media using apochromatic lenses and a light separating means

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59185044A (ja) * 1983-04-01 1984-10-20 Nippon Telegr & Teleph Corp <Ntt> 光メモリ装置
JPS60132616U (ja) * 1984-02-13 1985-09-04 パイオニア株式会社 記録装置
JPH04134732A (ja) * 1990-09-26 1992-05-08 Nippon Telegr & Teleph Corp <Ntt> マルチビーム光ヘッド
US5295125A (en) * 1992-02-03 1994-03-15 Hitachi, Ltd. Optical head device for recording/reproduction for recording medium using plural light spots
EP1884944B1 (en) * 1997-03-13 2014-08-27 Hitachi Maxell, Ltd. Compatible objective lens

Also Published As

Publication number Publication date
EP1745476B1 (en) 2008-03-26
EP1745476A1 (en) 2007-01-24
DE602005005665T2 (de) 2009-07-09
CN1950898A (zh) 2007-04-18
KR20070012848A (ko) 2007-01-29
WO2005106864A1 (en) 2005-11-10
ATE390686T1 (de) 2008-04-15
DE602005005665D1 (de) 2008-05-08
US20080239897A1 (en) 2008-10-02

Similar Documents

Publication Publication Date Title
US4731772A (en) Optical head using hologram lens for both beam splitting and focus error detection functions
MY139633A (en) Optical head, optical drive apparatus, and method for generating tracking error signal
TW200719336A (en) Method of reading out information from a multiple layer optical recording medium and optical readout device
CN1530772A (zh) 用于记录和再现全息数据的方法以及全息记录介质
MY134813A (en) Compatible optical disk player and data recording and reproducing method
TW200601294A (en) Optical information recording device
TW200631001A (en) Method of detecting focus error singnal of optical head and optical recording/reproducing apparatus utilizing the same
US20060023581A1 (en) Optical disk recording device and pickup device
TW200606873A (en) Optical reader/writer with dedicated focus tracking beam
US20070041302A1 (en) Information recording apparatus, and information recording/reproducing apparatus
US6845079B2 (en) High-speed optical recording and erasing method and apparatus using two beams
TW200606905A (en) Optical reader/writer with dedicated focus tracking beam
CN101606200A (zh) 焦点偏移记录系统和方法
CN102385875B (zh) 信息再生装置
US7411872B1 (en) Servo-tracking and three-dimensional alignment in page-based data optical storage
EP1067528A3 (en) Integrated optical unit, optical head and optical recording and/or reproducing apparatus
FR2879798B1 (fr) Memoire holographique a detection homodyne
US8059508B2 (en) Holographic information storage medium, and apparatus and method for inspecting defect thereof
KR20080062360A (ko) 홀로그램 기록 장치 및 방법
JPH08338904A (ja) 光学素子及び光学的情報記録再生装置
CN100349217C (zh) 可补偿摇摆定址信号的光盘机及其方法
KR19980022577A (ko) 광픽업장치
JPS63247716A (ja) ビ−ム変換装置
EP2128866A1 (en) Method and apparatus for identifying a media type of an optical disk
JP2006309852A (ja) 光ヘッド装置および情報記録再生装置