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TW200627435A - Multiple layer optical record carrier scanning - Google Patents

Multiple layer optical record carrier scanning

Info

Publication number
TW200627435A
TW200627435A TW094135916A TW94135916A TW200627435A TW 200627435 A TW200627435 A TW 200627435A TW 094135916 A TW094135916 A TW 094135916A TW 94135916 A TW94135916 A TW 94135916A TW 200627435 A TW200627435 A TW 200627435A
Authority
TW
Taiwan
Prior art keywords
record carrier
zones
multiple layer
layer optical
optical record
Prior art date
Application number
TW094135916A
Other languages
Chinese (zh)
Inventor
Johannes Joseph Hubertina Barbara Schleipen
Sjoerd Stallinga
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 TW200627435A publication Critical patent/TW200627435A/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
    • G11B7/12—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
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1367—Stepped phase plates
    • 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
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G11B7/1369—Active plates, e.g. liquid crystal panels or electrostrictive elements
    • 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
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

An optical scanning device for scanning a record carrier, the carrier having a first information layer and a second information layer. The device includes a radiation source for generating a radiation beam of a predetermined wavelength, and an objective lens. The objective lens has a first surface divided into at least a first set of zones and a second set of zones. The first set of zones is arranged to focus incident radiation of the predetermined wavelength to scan the first information layer. The second set of zones is arranged to focus incident radiation of the predetermined wavelength to scan the second information layer.
TW094135916A 2004-10-18 2005-10-14 Multiple layer optical record carrier scanning TW200627435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04300688 2004-10-18

Publications (1)

Publication Number Publication Date
TW200627435A true TW200627435A (en) 2006-08-01

Family

ID=35677544

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094135916A TW200627435A (en) 2004-10-18 2005-10-14 Multiple layer optical record carrier scanning

Country Status (2)

Country Link
TW (1) TW200627435A (en)
WO (1) WO2006043187A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5696750A (en) * 1995-06-05 1997-12-09 Nec Corporation Optical head apparatus for different types of disks
KR0179138B1 (en) * 1995-12-01 1999-04-15 구자홍 Objective
US5777803A (en) * 1996-02-23 1998-07-07 Industrial Technology Research Institute Objective lens for optical pick-up head of optical disk drive
JP2000200432A (en) * 1996-12-24 2000-07-18 Sanyo Electric Co Ltd Optical disk reproducing device
JP2000076665A (en) * 1998-08-27 2000-03-14 Pioneer Electronic Corp Optical pickup device
JP2002237063A (en) * 2001-02-09 2002-08-23 Pioneer Electronic Corp Information recording/reproducing device
JP2002279680A (en) * 2001-03-21 2002-09-27 Konica Corp Optical pickup device, condensing optical system for optical pickup device, and method for recording and reproducing optical information

Also Published As

Publication number Publication date
WO2006043187A1 (en) 2006-04-27

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