AU7704700A - Single laser pickup for use with cd, dvd and cd-r discs - Google Patents

Single laser pickup for use with cd, dvd and cd-r discs

Info

Publication number
AU7704700A
AU7704700A AU77047/00A AU7704700A AU7704700A AU 7704700 A AU7704700 A AU 7704700A AU 77047/00 A AU77047/00 A AU 77047/00A AU 7704700 A AU7704700 A AU 7704700A AU 7704700 A AU7704700 A AU 7704700A
Authority
AU
Australia
Prior art keywords
discs
dvd
single laser
laser pickup
pickup
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU77047/00A
Inventor
Barry G. Broome
Jenkin A. Richard
Kennet Vilhelmsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JENKIN A RICHARD
Original Assignee
JENKIN A RICHARD
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 JENKIN A RICHARD filed Critical JENKIN A RICHARD
Publication of AU7704700A publication Critical patent/AU7704700A/en
Abandoned legal-status Critical Current

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
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • 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
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
AU77047/00A 1999-09-29 2000-09-19 Single laser pickup for use with cd, dvd and cd-r discs Abandoned AU7704700A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US40873699A 1999-09-29 1999-09-29
US09408736 1999-09-29
US55370400A 2000-04-20 2000-04-20
US09553704 2000-04-20
US20161200P 2000-05-03 2000-05-03
US60201612 2000-05-03
PCT/US2000/025671 WO2001024173A1 (en) 1999-09-29 2000-09-19 Single laser pickup for use with cd, dvd and cd-r discs

Publications (1)

Publication Number Publication Date
AU7704700A true AU7704700A (en) 2001-04-30

Family

ID=27394324

Family Applications (1)

Application Number Title Priority Date Filing Date
AU77047/00A Abandoned AU7704700A (en) 1999-09-29 2000-09-19 Single laser pickup for use with cd, dvd and cd-r discs

Country Status (2)

Country Link
AU (1) AU7704700A (en)
WO (1) WO2001024173A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006121966A2 (en) * 2005-05-06 2006-11-16 Cdm Optics, Inc. Light focusing systems with extended depth of focus
EP3594731A1 (en) * 2018-07-10 2020-01-15 CSEM Centre Suisse D'electronique Et De Microtechnique SA Micro-optical component for generating an image

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349592A (en) * 1992-02-27 1994-09-20 Kabushiki Kaisha Toshiba Super-resolution optical element for use in image forming apparatus
US5621717A (en) * 1995-06-07 1997-04-15 International Business Machines Corporation Reading optical disks having substrates with diverse axial thicknesses
DE69726527T2 (en) * 1996-03-18 2004-09-23 Seiko Epson Corp. OPTICAL HEAD AND OPTICAL RECORDING DEVICE

Also Published As

Publication number Publication date
WO2001024173A1 (en) 2001-04-05

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase