JPS6331857B2 - - Google Patents
Info
- Publication number
- JPS6331857B2 JPS6331857B2 JP56200518A JP20051881A JPS6331857B2 JP S6331857 B2 JPS6331857 B2 JP S6331857B2 JP 56200518 A JP56200518 A JP 56200518A JP 20051881 A JP20051881 A JP 20051881A JP S6331857 B2 JPS6331857 B2 JP S6331857B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- recording
- level detection
- optical disk
- level
- 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
Links
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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56200518A JPS58102338A (ja) | 1981-12-11 | 1981-12-11 | 光デイスク記録・再生装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56200518A JPS58102338A (ja) | 1981-12-11 | 1981-12-11 | 光デイスク記録・再生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58102338A JPS58102338A (ja) | 1983-06-17 |
| JPS6331857B2 true JPS6331857B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1988-06-27 |
Family
ID=16425640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56200518A Granted JPS58102338A (ja) | 1981-12-11 | 1981-12-11 | 光デイスク記録・再生装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58102338A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6151631A (ja) * | 1984-08-20 | 1986-03-14 | Sharp Corp | 光磁気メモリ素子 |
| US4949331A (en) * | 1985-06-19 | 1990-08-14 | Hitachi, Ltd. | Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus |
| JPH0746429B2 (ja) * | 1985-06-21 | 1995-05-17 | オリンパス光学工業株式会社 | 光学式記録再生装置 |
| JPH0619836B2 (ja) * | 1985-11-11 | 1994-03-16 | 株式会社日立製作所 | 閾値レベル自動制御回路 |
| US5107486A (en) * | 1985-12-04 | 1992-04-21 | Sharp Kabushiki Kaisha | Optical memory device with grooves and pits in selected dimensional relationship |
| JP2693289B2 (ja) * | 1991-08-09 | 1997-12-24 | シャープ株式会社 | 光メモリ |
-
1981
- 1981-12-11 JP JP56200518A patent/JPS58102338A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58102338A (ja) | 1983-06-17 |