JPS6427995A - Optical information recording medium - Google Patents

Optical information recording medium

Info

Publication number
JPS6427995A
JPS6427995A JP62186071A JP18607187A JPS6427995A JP S6427995 A JPS6427995 A JP S6427995A JP 62186071 A JP62186071 A JP 62186071A JP 18607187 A JP18607187 A JP 18607187A JP S6427995 A JPS6427995 A JP S6427995A
Authority
JP
Japan
Prior art keywords
coloring matter
main
cyanine
recording
auxiliary
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
JP62186071A
Other languages
Japanese (ja)
Inventor
Keiko Ichinose
Tsutomu Sato
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP62186071A priority Critical patent/JPS6427995A/en
Publication of JPS6427995A publication Critical patent/JPS6427995A/en
Pending 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
    • G11B7/246—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
    • G11B2007/24612—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 two or more dyes in one layer

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To enable high-sensitivity recording and high-contrast reproduction through using a single pickup, by providing a recording layer comprising a mixed coloring matter constituted of a main cyanine coloring matter and an auxiliary cyanine coloring matter on a substrate. CONSTITUTION:A recording layer in a recording medium comprises a mixed cyanine coloring matter comprising a main cyanine coloring matter and an auxiliary cyanine coloring matter, wherein the reflection peak wavelength region of the auxiliary coloring mater substantially coincides with the absorption peak wavelength region of the main coloring matter, and the number of methine groups in the auxiliary coloring matter is smaller than that in the main coloring matter. The cyanine coloring matters may be based on quinoline, benzothiazole or dimethylindolenine. The main cyanine coloring matter is so selected that the absorption peak wavelength region thereof substantially coincides with the wavelength of laser beams used for recording and reproduction. The auxilia ry cyanine coloring matter is used in an amount of 0.5-0.05pts.wt. per 1pt.wt. of the main cyanine coloring matter. The recording medium this constructed is markedly enhanced in reflectance at the absorption peak wavelength of the recording layer, and has high-contrast recording and reproduction characteristics.
JP62186071A 1987-07-24 1987-07-24 Optical information recording medium Pending JPS6427995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62186071A JPS6427995A (en) 1987-07-24 1987-07-24 Optical information recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62186071A JPS6427995A (en) 1987-07-24 1987-07-24 Optical information recording medium

Publications (1)

Publication Number Publication Date
JPS6427995A true JPS6427995A (en) 1989-01-30

Family

ID=16181878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62186071A Pending JPS6427995A (en) 1987-07-24 1987-07-24 Optical information recording medium

Country Status (1)

Country Link
JP (1) JPS6427995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978392A4 (en) * 1997-04-23 2000-05-10 Sony Corp Optical recording media

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0978392A4 (en) * 1997-04-23 2000-05-10 Sony Corp Optical recording media
US6727041B1 (en) 1997-04-23 2004-04-27 Sony Corporation Optical recording media
US7008753B2 (en) 1997-04-23 2006-03-07 Sony Corporation Optical recording medium

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