FR2531798B1 - - Google Patents
Info
- Publication number
- FR2531798B1 FR2531798B1 FR8214044A FR8214044A FR2531798B1 FR 2531798 B1 FR2531798 B1 FR 2531798B1 FR 8214044 A FR8214044 A FR 8214044A FR 8214044 A FR8214044 A FR 8214044A FR 2531798 B1 FR2531798 B1 FR 2531798B1
- Authority
- FR
- France
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29316981A | 1981-08-17 | 1981-08-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2531798A1 FR2531798A1 (en) | 1984-02-17 |
| FR2531798B1 true FR2531798B1 (en) | 1987-04-30 |
Family
ID=23127956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8214044A Expired FR2531798B1 (en) | 1981-08-17 | 1982-08-12 |
Country Status (5)
| Country | Link |
|---|---|
| JP (2) | JPS5838193A (en) |
| DE (1) | DE3229573A1 (en) |
| FR (1) | FR2531798B1 (en) |
| GB (1) | GB2105094B (en) |
| NL (1) | NL192279C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4451915A (en) * | 1982-04-15 | 1984-05-29 | Burroughs Corporation | Optical storage system employing a multi-layer optical medium |
| GB2121227A (en) * | 1982-05-11 | 1983-12-14 | Nigel Geoffrey Ley | Optical memory recording disc |
| JPS5990248A (en) * | 1982-11-15 | 1984-05-24 | Sony Corp | Information recording medium |
| GB8309447D0 (en) * | 1983-04-07 | 1983-05-11 | Combined Tech Corp Plc | Optical data storage |
| NL8301632A (en) * | 1983-05-09 | 1984-12-03 | Philips Nv | REGISTRATION HOLDER IN WHICH INFORMATION CAN BE REGISTERED AND READ OUT BY OPTICAL ROAD. |
| US4544443A (en) * | 1983-05-13 | 1985-10-01 | Shap Kabushiki Kaisha | Method for manufacturing an optical memory element |
| US4673602A (en) * | 1984-06-13 | 1987-06-16 | Sumitomo Bakelite Company Limited | Composite substrate plate for magnetic or optical disk and process for production thereof |
| JPH02177030A (en) * | 1988-12-27 | 1990-07-10 | Sharp Corp | Optical memory element |
| US5099469A (en) * | 1990-02-20 | 1992-03-24 | Del Mar Avionics | Process for manufacturing an optical disc master |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4069487A (en) * | 1974-12-26 | 1978-01-17 | Canon Kabushiki Kaisha | Recording member and process for recording |
| JPS5247740A (en) * | 1975-10-14 | 1977-04-15 | Canon Inc | Reproducing process |
| JPS52138101A (en) * | 1976-05-14 | 1977-11-18 | Hitachi Ltd | Formation of a concavo-convex image |
| FR2365854A1 (en) * | 1976-09-24 | 1978-04-21 | Thomson Brandt | METHOD OF MANUFACTURING AN OPTICALLY RECORDABLE AND READABLE INFORMATION MEDIA AND MEDIA OBTAINED BY SUCH A PROCESS |
| US4216501A (en) * | 1977-03-28 | 1980-08-05 | Rca Corporation | Optical anti-reflective information record |
| US4285056A (en) * | 1979-10-17 | 1981-08-18 | Rca Corporation | Replicable optical recording medium |
| JPS56119947A (en) * | 1980-02-23 | 1981-09-19 | Sharp Corp | Information recording disc |
| JPS56156144U (en) * | 1980-04-21 | 1981-11-21 | ||
| US4383311A (en) * | 1980-10-21 | 1983-05-10 | Rca Corporation | Optical recording medium and information record with indented overcoat |
| JP2939562B2 (en) * | 1990-05-24 | 1999-08-25 | 日本電信電話株式会社 | Direction correction method for small diameter pipe burial and small diameter pipe burying device |
-
1982
- 1982-08-07 DE DE19823229573 patent/DE3229573A1/en active Granted
- 1982-08-12 FR FR8214044A patent/FR2531798B1/fr not_active Expired
- 1982-08-12 JP JP57140903A patent/JPS5838193A/en active Granted
- 1982-08-16 NL NL8203213A patent/NL192279C/en not_active IP Right Cessation
- 1982-08-16 GB GB8223551A patent/GB2105094B/en not_active Expired
-
1991
- 1991-11-28 JP JP3337956A patent/JPH0821178B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0821178B2 (en) | 1996-03-04 |
| JPS5838193A (en) | 1983-03-05 |
| GB2105094B (en) | 1985-10-09 |
| JPH0430095B2 (en) | 1992-05-20 |
| FR2531798A1 (en) | 1984-02-17 |
| NL192279B (en) | 1996-12-02 |
| NL8203213A (en) | 1983-03-16 |
| GB2105094A (en) | 1983-03-16 |
| JPH0547040A (en) | 1993-02-26 |
| DE3229573A1 (en) | 1983-02-24 |
| NL192279C (en) | 1997-04-03 |
| DE3229573C2 (en) | 1992-05-21 |