DE3570144D1 - Optical recording medium - Google Patents

Optical recording medium

Info

Publication number
DE3570144D1
DE3570144D1 DE8585102100T DE3570144T DE3570144D1 DE 3570144 D1 DE3570144 D1 DE 3570144D1 DE 8585102100 T DE8585102100 T DE 8585102100T DE 3570144 T DE3570144 T DE 3570144T DE 3570144 D1 DE3570144 D1 DE 3570144D1
Authority
DE
Germany
Prior art keywords
recording medium
optical recording
optical
medium
recording
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.)
Expired
Application number
DE8585102100T
Other languages
English (en)
Inventor
Akihiko Kuroiwa
Shigeru Asami
Toshiki Aoi
Kazuo Takahashi
Kenryo Namba
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.)
TDK Corp
Original Assignee
TDK Corp
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
Priority claimed from JP59035686A external-priority patent/JPS60178092A/ja
Priority claimed from JP60027988A external-priority patent/JPS60203492A/ja
Application filed by TDK Corp filed Critical TDK Corp
Application granted granted Critical
Publication of DE3570144D1 publication Critical patent/DE3570144D1/de
Expired 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
    • G11B7/241—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
    • 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
    • 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
    • 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
    • G11B7/246—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 dyes
    • G11B7/2463—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 dyes azulene
    • 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
    • G11B7/246—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 dyes
    • G11B7/2467—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 dyes azo-dyes
    • 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
    • G11B7/246—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 dyes
    • G11B7/247—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 dyes methine or polymethine dyes
    • G11B7/2472—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 dyes methine or polymethine dyes cyanine
    • 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
    • G11B7/246—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 dyes
    • G11B7/248—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 dyes porphines; azaporphines, e.g. phthalocyanines
    • 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
    • G11B7/249—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 organometallic compounds
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Liquid Crystal (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
DE8585102100T 1984-02-27 1985-02-26 Optical recording medium Expired DE3570144D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59035686A JPS60178092A (ja) 1984-02-27 1984-02-27 光記録媒体
JP60027988A JPS60203492A (ja) 1985-02-15 1985-02-15 光記録媒体

Publications (1)

Publication Number Publication Date
DE3570144D1 true DE3570144D1 (en) 1989-06-15

Family

ID=26365998

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585102100T Expired DE3570144D1 (en) 1984-02-27 1985-02-26 Optical recording medium

Country Status (3)

Country Link
US (1) US4752820A (de)
EP (1) EP0153729B1 (de)
DE (1) DE3570144D1 (de)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8431924D0 (en) * 1984-12-18 1985-01-30 Ici Plc Optical recording medium
DE3583013D1 (de) * 1984-12-19 1991-07-04 Mitsubishi Chem Ind Squarilium-verbindungen und fluessigkristallzusammensetzungen, die diese enthalten.
JPS61228418A (ja) * 1985-04-02 1986-10-11 Sony Corp 液晶表示装置
GB2177228B (en) * 1985-06-14 1989-12-28 Semiconductor Energy Lab Non-volatile liquid crystal optical storage device
US4855976A (en) * 1985-06-14 1989-08-08 Semiconductor Energy Laboratory Co., Ltd. Information writing method for an optical disc memory system utilizing a smectic chiral liquid crystal
JPS6266990A (ja) * 1985-09-20 1987-03-26 Nippon Oil Co Ltd 記録媒体の記録方法
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
DE3704146A1 (de) * 1987-02-11 1988-09-29 Basf Ag Laseroptisches schreib- und leseverfahren
DE3852907T2 (de) * 1987-05-09 1995-05-24 Semiconductor Energy Lab Karte mit einem Datenspeicher aus ferroelektrischen Flüssigkristallen.
US6090508A (en) * 1988-06-07 2000-07-18 Ricoh Company, Ltd. Optically anisotropic recording medium and method of recording and erasing information using the same
JP2693514B2 (ja) * 1988-08-31 1997-12-24 株式会社東芝 情報記録媒体
US5019476A (en) * 1988-11-16 1991-05-28 Olympus Optical Co., Ltd. Optical recording medium
US5080467A (en) * 1989-03-03 1992-01-14 Greyhawk Systems, Inc Biphenyl derivatives for photostabilization in pulsed optical darkening apparatus and method
JPH02273338A (ja) * 1989-04-13 1990-11-07 Canon Inc 情報記憶媒体
US5187248A (en) * 1989-05-26 1993-02-16 Basf Aktiengesellschaft Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on
US5187298A (en) * 1990-05-18 1993-02-16 Basf Aktiengesellschaft Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on
DE3930667A1 (de) * 1989-09-14 1991-03-28 Basf Ag Reversible oder irreversible erzeugung einer abbildung
US5186865A (en) * 1989-12-26 1993-02-16 Allied-Signal Inc. Electro-optical materials and light modulator devices containing same
US5212027A (en) * 1990-05-18 1993-05-18 Basf Aktiengesellschaft Monomers and their use for the production of a laser-optical recording element which can be repeatedly erased and recorded on
DE4106353A1 (de) * 1991-02-28 1992-09-03 Basf Ag Reversible oder irreversible erzeugung einer abbildung
US5153759A (en) * 1991-04-01 1992-10-06 Xerox Corporation Optically addressed light valve system
DE4211502C2 (de) * 1992-04-07 1995-04-13 Nematel Dr Rudolf Eidenschink Selektiv veränderbarer optischer Datenspeicher
US5693421A (en) * 1992-12-22 1997-12-02 Dai Nippon Printing Co., Ltd. Information recording medium and information recording and reproducing method
US5309262A (en) * 1992-12-23 1994-05-03 Xerox Corporation Optically addressed light valve system with two dielectric mirrors separated by a light separating element
DE4313478C1 (de) * 1993-04-24 1994-09-01 Imm Inst Mikrotech Selektiv veränderbarer, optischer Datenspeicher und Verfahren zu seiner Herstellung
GB9315126D0 (en) * 1993-07-21 1993-09-01 Philips Electronics Uk Ltd Opto-electronic memory systems
US5786827A (en) * 1995-02-21 1998-07-28 Lucent Technologies Inc. Semiconductor optical storage device and uses thereof
US6214499B1 (en) * 1998-09-11 2001-04-10 Eastman Kodak Company Liquid crystalline filter dyes for imaging elements
US6829045B2 (en) * 2001-03-05 2004-12-07 Eastman Kodak Company Rewritable display having a dielectric spacing layer
US6885409B2 (en) * 2002-09-27 2005-04-26 Eastman Kodak Company Cholesteric liquid crystal display system
US7131584B2 (en) * 2003-11-13 2006-11-07 Eastman Kodak Company Apparatus and means for updating a memory display
US7087351B2 (en) * 2004-09-29 2006-08-08 Eastman Kodak Company Antistatic layer for electrically modulated display

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2440485A1 (de) * 1974-08-23 1976-03-04 Philips Patentverwaltung Verfahren und aufzeichnungsmedium zur informationsaufzeichnung mit hilfe von laserstrahlen
DE2440486C3 (de) * 1974-08-23 1979-01-04 Philips Patentverwaltung Gmbh, 2000 Hamburg Optisches Speichermaterial mit einer Speicherschicht, deren Struktur durch äußere Strahlung veränderbar ist
US3894794A (en) * 1974-10-07 1975-07-15 Xerox Corp Liquid crystal imaging system using tribulyltin oxide
CA1155548A (en) * 1980-10-31 1983-10-18 Richard L. Wilkinson Optical recording medium and method for its formation
US4514045A (en) * 1981-06-22 1985-04-30 Minnesota Mining And Manufacturing Company Helichromic-smectic liquid crystal compositions and display cells
US4622654A (en) * 1984-01-16 1986-11-11 Energy Conversion Devices, Inc. Liquid crystal light valve with memory
US4581317A (en) * 1984-03-01 1986-04-08 E. I. Du Pont De Nemours And Company Optical recording element

Also Published As

Publication number Publication date
US4752820A (en) 1988-06-21
EP0153729A1 (de) 1985-09-04
EP0153729B1 (de) 1989-05-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee