CA2085974A1 - Multi-bit cellular reflectivity modulation for optical media - Google Patents

Multi-bit cellular reflectivity modulation for optical media

Info

Publication number
CA2085974A1
CA2085974A1 CA 2085974 CA2085974A CA2085974A1 CA 2085974 A1 CA2085974 A1 CA 2085974A1 CA 2085974 CA2085974 CA 2085974 CA 2085974 A CA2085974 A CA 2085974A CA 2085974 A1 CA2085974 A1 CA 2085974A1
Authority
CA
Canada
Prior art keywords
cell type
cell
laser light
disk
predetermined amount
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
CA 2085974
Other languages
English (en)
French (fr)
Inventor
Sam Sampson Lightstone
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.)
IBM Canada Ltd
Original Assignee
IBM Canada 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 IBM Canada Ltd filed Critical IBM Canada Ltd
Priority to CA 2085974 priority Critical patent/CA2085974A1/en
Priority to JP30838693A priority patent/JPH06215380A/ja
Publication of CA2085974A1 publication Critical patent/CA2085974A1/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
    • G11B7/24—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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • 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
    • G11B7/0051—Reproducing involving phase depth effects
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
CA 2085974 1992-12-21 1992-12-21 Multi-bit cellular reflectivity modulation for optical media Abandoned CA2085974A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA 2085974 CA2085974A1 (en) 1992-12-21 1992-12-21 Multi-bit cellular reflectivity modulation for optical media
JP30838693A JPH06215380A (ja) 1992-12-21 1993-12-08 光メディアのマルチビット・セルラ反射率変調

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2085974 CA2085974A1 (en) 1992-12-21 1992-12-21 Multi-bit cellular reflectivity modulation for optical media

Publications (1)

Publication Number Publication Date
CA2085974A1 true CA2085974A1 (en) 1994-06-22

Family

ID=4150886

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2085974 Abandoned CA2085974A1 (en) 1992-12-21 1992-12-21 Multi-bit cellular reflectivity modulation for optical media

Country Status (2)

Country Link
JP (1) JPH06215380A (ja)
CA (1) CA2085974A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7050383B2 (en) 2000-04-04 2006-05-23 Sharp Kabushiki Kaisha Optical recording medium recorded with information in depth direction, and method and apparatus of reproduction therefrom

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1067523A3 (en) 1999-06-30 2007-05-23 Sharp Kabushiki Kaisha Optical disc having pits of different depth formed therein, optical disc device for reproduction the same, and method of reproduction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03141032A (ja) * 1989-10-26 1991-06-17 Brother Ind Ltd 光記録媒体の情報記録方式
JPH0444645A (ja) * 1990-06-11 1992-02-14 Omron Corp 光学素子

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7050383B2 (en) 2000-04-04 2006-05-23 Sharp Kabushiki Kaisha Optical recording medium recorded with information in depth direction, and method and apparatus of reproduction therefrom
US7580329B2 (en) 2000-04-04 2009-08-25 Sharp Kabushiki Kaisha Optical recording medium recorded with information in depth direction, and method and apparatus of reproduction therefrom

Also Published As

Publication number Publication date
JPH06215380A (ja) 1994-08-05

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Dead