JPS64985A - Recording medium for optical card - Google Patents
Recording medium for optical cardInfo
- Publication number
- JPS64985A JPS64985A JP62155300A JP15530087A JPS64985A JP S64985 A JPS64985 A JP S64985A JP 62155300 A JP62155300 A JP 62155300A JP 15530087 A JP15530087 A JP 15530087A JP S64985 A JPS64985 A JP S64985A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- optical card
- information
- layer
- light beam
- 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
Links
Landscapes
- Credit Cards Or The Like (AREA)
- Holo Graphy (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE: To prevent a decrease in information capacity of an optical card and to enable a hologram recording part to be utilized as a recording region for keeping the information in secret by providing the hologram recording part to a part of the optical card.
CONSTITUTION: A recording medium 10 of this optical card is constituted by laminating a vapor deposited dye (or reflective metal) 13 as a layer for absorbing the scattering of a light beam, a chalcogen glass layer 12 as an absorptive layer for the light beam and a diffusive metal layer 12' for the chalcogen glass layer 12 by the projection of the light beam successively on a substrate 14. The optical card 10 is, therefore, capable of making high-density recording as a laser light recording medium as well as hologram recording. The pattern recording of holograms is thereby enabled in addition to the ordinary pattern formation of information tracks and, therefore, the recording capacity is increased and the hologram recording part is convenient for recording of the confidential information.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62155300A JPS64985A (en) | 1987-06-24 | 1987-06-24 | Recording medium for optical card |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62155300A JPS64985A (en) | 1987-06-24 | 1987-06-24 | Recording medium for optical card |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01985A JPH01985A (en) | 1989-01-05 |
JPS64985A true JPS64985A (en) | 1989-01-05 |
Family
ID=15602880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62155300A Pending JPS64985A (en) | 1987-06-24 | 1987-06-24 | Recording medium for optical card |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS64985A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756058A (en) * | 1980-09-22 | 1982-04-03 | Sakamura Kikai Seisakusho:Kk | Centrifugal deoiling device for small product |
-
1987
- 1987-06-24 JP JP62155300A patent/JPS64985A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756058A (en) * | 1980-09-22 | 1982-04-03 | Sakamura Kikai Seisakusho:Kk | Centrifugal deoiling device for small product |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MX9700859A (en) | Dual layer optical medium having partially reflecting thin film layer. | |
MY140536A (en) | Optical recording medium and method of producing same | |
EP0271977A3 (en) | Erasable optical data storage medium having an embedded servotrack and a subsurface recording interface | |
EP0994470A3 (en) | Optical recording medium and optical recording/reproducing apparatus | |
JPS56145535A (en) | Disc for optical recording | |
EP0338776A3 (en) | Bump-forming media including thin intermediate reflective layer and methods for writing, reading, and erasing same | |
EP0892362A3 (en) | Record carrier with an optical variable element | |
EP0915458A3 (en) | Optical head and optical disk apparatus | |
EP0903731A3 (en) | Optical recording medium | |
MY104122A (en) | Optical information recording medium. | |
MX9703319A (en) | Optical multilayer information carrier. | |
RU97108956A (en) | OPTICAL MULTILAYER INFORMATION MEDIA | |
JPS5740766A (en) | Optical recording disc | |
DK0608358T3 (en) | Optical data storage disk | |
EP0385341A3 (en) | Optical recording medium | |
EP0797194A3 (en) | Double-layered information recording medium having information recording layers | |
JPS57158047A (en) | Optical information recording medium | |
EP0376327A3 (en) | Optical recording medium | |
WO2002029787A1 (en) | Optical information recording medium and method of reproducing the record | |
AU574069B2 (en) | Optical recording case | |
MY118028A (en) | Optical recording medium. | |
EP0895231A3 (en) | Optical information recording medium | |
CA2073320A1 (en) | Magneto-optical recording medium | |
EP0366455A3 (en) | Optical recording medium and method of its production | |
EP0548828A3 (en) | An optical data recording media and a method for recording, erasing and reproducing data on the same |