AU3077300A - Optical head - Google Patents

Optical head

Info

Publication number
AU3077300A
AU3077300A AU30773/00A AU3077300A AU3077300A AU 3077300 A AU3077300 A AU 3077300A AU 30773/00 A AU30773/00 A AU 30773/00A AU 3077300 A AU3077300 A AU 3077300A AU 3077300 A AU3077300 A AU 3077300A
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
AU30773/00A
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 AU3077300A publication Critical patent/AU3077300A/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
    • G11B7/1395—Beam splitters or combiners

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
AU30773/00A 1999-01-27 2000-01-24 Optical head Abandoned AU3077300A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP01836699A JP2003022561A (en) 1999-01-27 1999-01-27 Optical head
JP11/18366 1999-01-27
PCT/JP2000/000330 WO2000045383A1 (en) 1999-01-27 2000-01-24 Optical head

Publications (1)

Publication Number Publication Date
AU3077300A true AU3077300A (en) 2000-08-18

Family

ID=11969716

Family Applications (1)

Application Number Title Priority Date Filing Date
AU30773/00A Abandoned AU3077300A (en) 1999-01-27 2000-01-24 Optical head

Country Status (3)

Country Link
JP (1) JP2003022561A (en)
AU (1) AU3077300A (en)
WO (1) WO2000045383A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138625U (en) * 1987-03-04 1988-09-13
NL9002007A (en) * 1990-09-12 1992-04-01 Philips Nv DEVICE FOR SCANNING AN INFORMATION SHEET WITH OPTICAL RADIATION.
JP2633420B2 (en) * 1991-08-28 1997-07-23 三菱電機株式会社 Optical recording / reproducing device

Also Published As

Publication number Publication date
WO2000045383A1 (en) 2000-08-03
JP2003022561A (en) 2003-01-24

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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