JPS6311933A - Optical recording medium - Google Patents

Optical recording medium

Info

Publication number
JPS6311933A
JPS6311933A JP61155113A JP15511386A JPS6311933A JP S6311933 A JPS6311933 A JP S6311933A JP 61155113 A JP61155113 A JP 61155113A JP 15511386 A JP15511386 A JP 15511386A JP S6311933 A JPS6311933 A JP S6311933A
Authority
JP
Japan
Prior art keywords
compd
fulgide
long chain
steric hindrance
hydrocarbon
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.)
Pending
Application number
JP61155113A
Inventor
Eiji Ando
Junichi Hibino
Original Assignee
Agency Of Ind Science & Technol
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 Agency Of Ind Science & Technol filed Critical Agency Of Ind Science & Technol
Priority to JP61155113A priority Critical patent/JPS6311933A/en
Priority claimed from US07/023,253 external-priority patent/US4803287A/en
Publication of JPS6311933A publication Critical patent/JPS6311933A/en
Application status is Pending legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045Recording
    • G11B7/00455Recording involving reflectivity, absorption or colour changes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005Reproducing
    • G11B7/0052Reproducing involving reflectivity, absorption or colour changes
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055Erasing
    • G11B7/00552Erasing involving colour change media
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242Record 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
    • G11B7/244Record 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

Abstract

PURPOSE:To impart a steric hindrance to a titled medium and to suppress an isomerization reaction by incorporating a long chain to fulgide by using a specific photochromic compd. CONSTITUTION:The photochromic compd. expressed by the formula I (R is an alkyl chain of 5-31C) is used. The steric hindrance is imparted to the compd. and the decrease of a conversion rate by the isomerization is prevented by the long chain of the hydrocarbon incorporated into the compd. Since the fulgide skeleton itself has the higher hydrophilicity than the hydrophilicity of a long chain part, LB film is formed and the thin film having the properties of the fulgide is easily obtd. The easy formation of the independent LB film which is well balanced in the hydrophilic and hydrophobic characteristics and is, therefore, easy to handle is facilitated by the hydrocarbon of preferably 13-23C.
JP61155113A 1986-07-03 1986-07-03 Optical recording medium Pending JPS6311933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61155113A JPS6311933A (en) 1986-07-03 1986-07-03 Optical recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61155113A JPS6311933A (en) 1986-07-03 1986-07-03 Optical recording medium
US07/023,253 US4803287A (en) 1986-04-16 1987-03-09 Certain photochromic fulgide compounds and method for their synthesis

Publications (1)

Publication Number Publication Date
JPS6311933A true JPS6311933A (en) 1988-01-19

Family

ID=15598872

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61155113A Pending JPS6311933A (en) 1986-07-03 1986-07-03 Optical recording medium

Country Status (1)

Country Link
JP (1) JPS6311933A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061582A (en) * 1987-06-17 1991-10-29 Plessey Overseas Limited Optical data storage
US5989671A (en) * 1989-11-22 1999-11-23 Sharp Kabushiki Kaisha Optical recording medium and manufacturing method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220708A (en) * 1977-07-22 1980-09-02 Heller Harold G Photochromic compounds
JPS61138236A (en) * 1984-12-10 1986-06-25 Agency Of Ind Science & Technol Display element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220708A (en) * 1977-07-22 1980-09-02 Heller Harold G Photochromic compounds
JPS61138236A (en) * 1984-12-10 1986-06-25 Agency Of Ind Science & Technol Display element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061582A (en) * 1987-06-17 1991-10-29 Plessey Overseas Limited Optical data storage
US5989671A (en) * 1989-11-22 1999-11-23 Sharp Kabushiki Kaisha Optical recording medium and manufacturing method thereof

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