AU4957897A - Optical disc reader - Google Patents

Optical disc reader

Info

Publication number
AU4957897A
AU4957897A AU49578/97A AU4957897A AU4957897A AU 4957897 A AU4957897 A AU 4957897A AU 49578/97 A AU49578/97 A AU 49578/97A AU 4957897 A AU4957897 A AU 4957897A AU 4957897 A AU4957897 A AU 4957897A
Authority
AU
Australia
Prior art keywords
optical disc
disc reader
reader
optical
disc
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
AU49578/97A
Inventor
Touraj Moghaddam
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.)
VERITY GROUP PLC
Original Assignee
VERITY GROUP PLC
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 VERITY GROUP PLC filed Critical VERITY GROUP PLC
Publication of AU4957897A publication Critical patent/AU4957897A/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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • 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
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
AU49578/97A 1996-11-15 1997-11-13 Optical disc reader Abandoned AU4957897A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9623766 1996-11-15
GBGB9623766.4A GB9623766D0 (en) 1996-11-15 1996-11-15 Optical disc reader
PCT/GB1997/003123 WO1998022943A1 (en) 1996-11-15 1997-11-13 Optical disc reader

Publications (1)

Publication Number Publication Date
AU4957897A true AU4957897A (en) 1998-06-10

Family

ID=10802977

Family Applications (1)

Application Number Title Priority Date Filing Date
AU49578/97A Abandoned AU4957897A (en) 1996-11-15 1997-11-13 Optical disc reader

Country Status (3)

Country Link
AU (1) AU4957897A (en)
GB (2) GB9623766D0 (en)
WO (1) WO1998022943A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5584909A (en) * 1978-12-20 1980-06-26 Ricoh Co Ltd Information reading system by laser beam
JPH077509B2 (en) * 1989-02-20 1995-01-30 オムロン株式会社 2 light source type optical recording / reproducing apparatus
JP2846342B2 (en) * 1989-06-07 1999-01-13 株式会社日立製作所 High density optical reproduction device
JP3289798B2 (en) * 1993-10-01 2002-06-10 パイオニア株式会社 Optical information reading method and device
FR2741989B3 (en) * 1995-12-04 1998-01-09 Andre Yves Bernard DEVICE FOR OPTICALLY READING DIGITAL INFORMATION ON A MEDIUM, IN PARTICULAR LASER-READING DISK READING DEVICE

Also Published As

Publication number Publication date
GB2334811A (en) 1999-09-01
GB9623766D0 (en) 1997-01-08
WO1998022943A1 (en) 1998-05-28
GB9911096D0 (en) 1999-07-14

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