AU7964500A - Optical head - Google Patents

Optical head

Info

Publication number
AU7964500A
AU7964500A AU79645/00A AU7964500A AU7964500A AU 7964500 A AU7964500 A AU 7964500A AU 79645/00 A AU79645/00 A AU 79645/00A AU 7964500 A AU7964500 A AU 7964500A AU 7964500 A AU7964500 A AU 7964500A
Authority
AU
Australia
Prior art keywords
optical head
optical
head
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
AU79645/00A
Inventor
Akihiro Arai
Takao Hayashi
Tohru Nakamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of AU7964500A publication Critical patent/AU7964500A/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
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • 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
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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
    • G11B7/1381—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
    • 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
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
AU79645/00A 1999-11-01 2000-10-30 Optical head Abandoned AU7964500A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP31071199A JP2005100476A (en) 1999-11-01 1999-11-01 Optical head
JP11/310711 1999-11-01
PCT/JP2000/007651 WO2001033563A1 (en) 1999-11-01 2000-10-30 Optical head

Publications (1)

Publication Number Publication Date
AU7964500A true AU7964500A (en) 2001-05-14

Family

ID=18008561

Family Applications (1)

Application Number Title Priority Date Filing Date
AU79645/00A Abandoned AU7964500A (en) 1999-11-01 2000-10-30 Optical head

Country Status (3)

Country Link
JP (1) JP2005100476A (en)
AU (1) AU7964500A (en)
WO (1) WO2001033563A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007200477A (en) * 2006-01-27 2007-08-09 Funai Electric Co Ltd Optical head

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2897924B2 (en) * 1989-04-05 1999-05-31 オリンパス光学工業株式会社 Optical head
JPH03178064A (en) * 1989-12-07 1991-08-02 Nec Corp Optical head device
JP2763174B2 (en) * 1990-04-09 1998-06-11 松下電器産業株式会社 Optical pickup device
JP2655747B2 (en) * 1990-10-19 1997-09-24 シャープ株式会社 Optical pickup
JPH07141681A (en) * 1993-11-18 1995-06-02 Ricoh Co Ltd Optical head
JP2655065B2 (en) * 1993-12-28 1997-09-17 日本電気株式会社 Super-resolution optical head device
JP2655077B2 (en) * 1994-05-17 1997-09-17 日本電気株式会社 Optical head device
JP3642909B2 (en) * 1997-01-29 2005-04-27 松下電器産業株式会社 Optical head

Also Published As

Publication number Publication date
WO2001033563A1 (en) 2001-05-10
JP2005100476A (en) 2005-04-14

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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