JPS6426845A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPS6426845A JPS6426845A JP62182138A JP18213887A JPS6426845A JP S6426845 A JPS6426845 A JP S6426845A JP 62182138 A JP62182138 A JP 62182138A JP 18213887 A JP18213887 A JP 18213887A JP S6426845 A JPS6426845 A JP S6426845A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- optical recording
- thin film
- fulgide
- photochromic compd
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
- C07D493/04—Ortho-condensed systems
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
- G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic 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
- G11B7/242—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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
PURPOSE:To enable the formation of a very thin film maintaining recording characteristics over a long period by using a specified photochromic compd. CONSTITUTION:An optical recording medium is produced with a photochromic compd. represented by formula I (where R is 5-31C alkyl chain). The optical recording medium is a uniform, very thin film and has the photochromism of the fulgide and the recording life can be prolonged. The fulgide is formed into the thin film by the Langmuir-Blodgett's technique and the resulting optical recording medium is strong and has high stability.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62182138A JPS6426845A (en) | 1987-07-23 | 1987-07-23 | Optical recording medium |
US07/174,406 US4845240A (en) | 1987-05-06 | 1988-03-28 | Optical recording medium and process for producing the same |
US07/343,509 US4937120A (en) | 1987-05-06 | 1989-04-27 | Optical recording medium and process for producing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62182138A JPS6426845A (en) | 1987-07-23 | 1987-07-23 | Optical recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6426845A true JPS6426845A (en) | 1989-01-30 |
JPH0337171B2 JPH0337171B2 (en) | 1991-06-04 |
Family
ID=16113009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62182138A Granted JPS6426845A (en) | 1987-05-06 | 1987-07-23 | Optical recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6426845A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0407005A1 (en) * | 1989-06-10 | 1991-01-09 | THORN EMI plc | Verification device for a security system |
-
1987
- 1987-07-23 JP JP62182138A patent/JPS6426845A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0407005A1 (en) * | 1989-06-10 | 1991-01-09 | THORN EMI plc | Verification device for a security system |
Also Published As
Publication number | Publication date |
---|---|
JPH0337171B2 (en) | 1991-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |