TW200638365A - Information carrier having two data layers, system for reading such an information carrier - Google Patents

Information carrier having two data layers, system for reading such an information carrier

Info

Publication number
TW200638365A
TW200638365A TW094145151A TW94145151A TW200638365A TW 200638365 A TW200638365 A TW 200638365A TW 094145151 A TW094145151 A TW 094145151A TW 94145151 A TW94145151 A TW 94145151A TW 200638365 A TW200638365 A TW 200638365A
Authority
TW
Taiwan
Prior art keywords
information carrier
reading
data layers
layer
polarized
Prior art date
Application number
TW094145151A
Other languages
Chinese (zh)
Inventor
Robert Frans Maria Hendriks
Ralph Kurt
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 TW200638365A publication Critical patent/TW200638365A/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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • G11B7/24088—Pits for storing more than two values, i.e. multi-valued recording for data or prepits
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

The invention relates to an information carrier comprising: - a first layer (L1) comprising data areas made of a material polarized according to a first direction (d1), or made of a non-polarized material, - a second layer (L2) comprising data areas made of a material polarized according to a second direction (d2), or made of a non-polarized material, each data area of said first layer (L1) facing a data area of said second layer (L2), said first direction (d1) and second direction (d2) being neither identical nor perpendicular to each other.
TW094145151A 2004-12-22 2005-12-19 Information carrier having two data layers, system for reading such an information carrier TW200638365A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04300934 2004-12-22

Publications (1)

Publication Number Publication Date
TW200638365A true TW200638365A (en) 2006-11-01

Family

ID=36095793

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094145151A TW200638365A (en) 2004-12-22 2005-12-19 Information carrier having two data layers, system for reading such an information carrier

Country Status (2)

Country Link
TW (1) TW200638365A (en)
WO (1) WO2006067738A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5255262A (en) * 1991-06-04 1993-10-19 International Business Machines Corporation Multiple data surface optical data storage system with transmissive data surfaces
US5838653A (en) * 1995-10-04 1998-11-17 Reveo, Inc. Multiple layer optical recording media and method and system for recording and reproducing information using the same
NZ527033A (en) * 2001-01-16 2005-04-29 Berkshire Lab Inc Enhanced data storage and retrieval devices and systems and methods by optical means or by utilising a stored magnetic field strength to cause an amount of shifting of at least one frequency

Also Published As

Publication number Publication date
WO2006067738A1 (en) 2006-06-29

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