JPS6472343A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPS6472343A JPS6472343A JP62228374A JP22837487A JPS6472343A JP S6472343 A JPS6472343 A JP S6472343A JP 62228374 A JP62228374 A JP 62228374A JP 22837487 A JP22837487 A JP 22837487A JP S6472343 A JPS6472343 A JP S6472343A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- thickness
- reflectivity
- maximized
- relation
- 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
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
PURPOSE:To obtain a good autotracking control signal by specifying the thickness of a medium and the relation between the refractive index and extinction coefft. of the medium. CONSTITUTION:The medium is formed to have the thickness at which the reflectivity is maximized within tracking track parts and the thickness larger than the thickness at which the reflectivity is maximized in the region except the tracking tracks. In addition, the medium is so formed that the refractive index (n) and extinction coefft. K of the medium satisfy the relation K<=0.47n+0.28. A wide range of materials are usable without particularly limiting the same as the medium to be used, if said materials have light reflecting and absorbing properties. The good autotracking control signal of a high contrast ratio is thereby obtd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62228374A JPS6472343A (en) | 1987-09-14 | 1987-09-14 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62228374A JPS6472343A (en) | 1987-09-14 | 1987-09-14 | Optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6472343A true JPS6472343A (en) | 1989-03-17 |
Family
ID=16875462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62228374A Pending JPS6472343A (en) | 1987-09-14 | 1987-09-14 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6472343A (en) |
-
1987
- 1987-09-14 JP JP62228374A patent/JPS6472343A/en active Pending
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