JPH0453009B2 - - Google Patents
Info
- Publication number
- JPH0453009B2 JPH0453009B2 JP59021943A JP2194384A JPH0453009B2 JP H0453009 B2 JPH0453009 B2 JP H0453009B2 JP 59021943 A JP59021943 A JP 59021943A JP 2194384 A JP2194384 A JP 2194384A JP H0453009 B2 JPH0453009 B2 JP H0453009B2
- Authority
- JP
- Japan
- Prior art keywords
- address
- phase depth
- information
- groove
- phase
- 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.)
- Expired - Lifetime
Links
- 230000005855 radiation Effects 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 239000010410 layer Substances 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000002411 adverse Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002120 photoresistant polymer Polymers 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24085—Pits
-
- 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
- G11B7/00745—Sectoring or header formats within a track
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021943A JPS60167141A (ja) | 1984-02-10 | 1984-02-10 | 情報記録媒体 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59021943A JPS60167141A (ja) | 1984-02-10 | 1984-02-10 | 情報記録媒体 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60167141A JPS60167141A (ja) | 1985-08-30 |
| JPH0453009B2 true JPH0453009B2 (it) | 1992-08-25 |
Family
ID=12069127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59021943A Granted JPS60167141A (ja) | 1984-02-10 | 1984-02-10 | 情報記録媒体 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60167141A (it) |
-
1984
- 1984-02-10 JP JP59021943A patent/JPS60167141A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60167141A (ja) | 1985-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |