GB9121947D0 - Compact discs - Google Patents

Compact discs

Info

Publication number
GB9121947D0
GB9121947D0 GB919121947A GB9121947A GB9121947D0 GB 9121947 D0 GB9121947 D0 GB 9121947D0 GB 919121947 A GB919121947 A GB 919121947A GB 9121947 A GB9121947 A GB 9121947A GB 9121947 D0 GB9121947 D0 GB 9121947D0
Authority
GB
United Kingdom
Prior art keywords
compact discs
discs
compact
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.)
Withdrawn
Application number
GB919121947A
Other versions
GB2248963A (en
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of GB9121947D0 publication Critical patent/GB9121947D0/en
Publication of GB2248963A publication Critical patent/GB2248963A/en
Withdrawn legal-status Critical Current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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • 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
    • G11B7/0055—Erasing
    • G11B7/00555—Erasing involving liquid crystal media
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/25—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing liquid crystals
GB9121947A 1990-10-17 1991-10-16 Compact discs Withdrawn GB2248963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909022585A GB9022585D0 (en) 1990-10-17 1990-10-17 Compact discs

Publications (2)

Publication Number Publication Date
GB9121947D0 true GB9121947D0 (en) 1991-11-27
GB2248963A GB2248963A (en) 1992-04-22

Family

ID=10683887

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909022585A Pending GB9022585D0 (en) 1990-10-17 1990-10-17 Compact discs
GB9121947A Withdrawn GB2248963A (en) 1990-10-17 1991-10-16 Compact discs

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909022585A Pending GB9022585D0 (en) 1990-10-17 1990-10-17 Compact discs

Country Status (1)

Country Link
GB (2) GB9022585D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651381A1 (en) * 1993-10-28 1995-05-03 Akzo Nobel N.V. Optical storage medium and method of storing information
EP0651382A1 (en) * 1993-11-02 1995-05-03 Akzo Nobel N.V. Optical storage medium
AU1464295A (en) * 1994-01-27 1995-08-15 University Court Of The University Of Dundee, The Process of producing a data-storage unit
DE4431823A1 (en) * 1994-09-07 1996-03-14 Bayer Ag Process for enhancing information in photoaddressable side chain polymers
JP4074719B2 (en) 1999-01-08 2008-04-09 大日本印刷株式会社 Information recording medium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1018101B (en) * 1985-08-07 1992-09-02 株式会社半导体能源研究所 Nonvolatille optical disc memory with liquid crystal
US4832456A (en) * 1986-03-04 1989-05-23 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal disc memory with circular grooves for auto-focusing of write-in beam
US4853911A (en) * 1986-06-13 1989-08-01 Semiconductor Energy Laboratory Co., Ltd. Optical disc memory system utilizing a smectic chiral liquid crystal
GB8615527D0 (en) * 1986-06-25 1986-07-30 Secr Defence Liquid crystal polymers
JPH02123532A (en) * 1988-11-01 1990-05-11 Canon Inc Optical disk
JPH0660695B2 (en) * 1990-04-17 1994-08-10 エスエムシー株式会社 valve

Also Published As

Publication number Publication date
GB2248963A (en) 1992-04-22
GB9022585D0 (en) 1990-11-28

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)