JPS6455756A - Card-shaped optical recording medium - Google Patents
Card-shaped optical recording mediumInfo
- Publication number
- JPS6455756A JPS6455756A JP62210323A JP21032387A JPS6455756A JP S6455756 A JPS6455756 A JP S6455756A JP 62210323 A JP62210323 A JP 62210323A JP 21032387 A JP21032387 A JP 21032387A JP S6455756 A JPS6455756 A JP S6455756A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- recording
- recording medium
- card
- thickness
- 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
- 230000003287 optical effect Effects 0.000 title abstract 2
- 239000000758 substrate Substances 0.000 abstract 9
- 239000000853 adhesive Substances 0.000 abstract 3
- 229920003023 plastic Polymers 0.000 abstract 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
Landscapes
- Credit Cards Or The Like (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE:To prevent the erasure of recording information and the degradation of a grade by forming substrates on both sides in contact with a recording medium layer to an optically equal thickness. CONSTITUTION:This optical card 1 has an information recording region 2 and is constituted by superposing the recording medium layer 4 on the substrate 3 consisting of transparent plastic and providing the substrate 6 consisting of transparent plastic thereon via a transparent adhesive agent layer 5. The thickness d1 of the substrate 3 is 0.35-0.4mm. The substrates 6 3 are made of the same material and the adhesive agent layer 5 has the same refractive index as the refractive index of the substrate 6. The total thickness of the adhesive agent layer 5 and the substrate 6 is equal to the thickness d1 of the substrate 3. Recording and reproduction of ordinary information are executed from an arrow A direction in this constitution. The card 1 is turned over and the recording and reproduction are executed from an arrow B direction when the surface of the substrate 3 is flawed and the recording or reproduction is not possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210323A JPS6455756A (en) | 1987-08-26 | 1987-08-26 | Card-shaped optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62210323A JPS6455756A (en) | 1987-08-26 | 1987-08-26 | Card-shaped optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6455756A true JPS6455756A (en) | 1989-03-02 |
Family
ID=16587522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62210323A Pending JPS6455756A (en) | 1987-08-26 | 1987-08-26 | Card-shaped optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6455756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021928A1 (en) * | 1995-01-10 | 1996-07-18 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
| WO1999062063A1 (en) * | 1998-05-29 | 1999-12-02 | Tapematic, S.P.A. | Method for forming a protective barrier layer on an optical memory disc substrate |
| JP2003513392A (en) * | 1999-10-23 | 2003-04-08 | ウルトラカード，アイエヌシー． | Data storage device, apparatus and use thereof |
-
1987
- 1987-08-26 JP JP62210323A patent/JPS6455756A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996021928A1 (en) * | 1995-01-10 | 1996-07-18 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
| GB2311890A (en) * | 1995-01-10 | 1997-10-08 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
| GB2311890B (en) * | 1995-01-10 | 1999-06-23 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
| WO1999062063A1 (en) * | 1998-05-29 | 1999-12-02 | Tapematic, S.P.A. | Method for forming a protective barrier layer on an optical memory disc substrate |
| JP2003513392A (en) * | 1999-10-23 | 2003-04-08 | ウルトラカード，アイエヌシー． | Data storage device, apparatus and use thereof |
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