BE780146A - SPIRAL-STRUCTURED INFORMATION MEDIA IN WHICH SOUND INFORMATION AND / OR INFORMATION IS STORED - Google Patents
SPIRAL-STRUCTURED INFORMATION MEDIA IN WHICH SOUND INFORMATION AND / OR INFORMATION IS STOREDInfo
- Publication number
- BE780146A BE780146A BE780146A BE780146A BE780146A BE 780146 A BE780146 A BE 780146A BE 780146 A BE780146 A BE 780146A BE 780146 A BE780146 A BE 780146A BE 780146 A BE780146 A BE 780146A
- Authority
- BE
- Belgium
- Prior art keywords
- information
- spiral
- stored
- media
- structured
- Prior art date
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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/013—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 for discrete information, i.e. where each information unit is stored in a distinct discrete location, e.g. digital information formats within a data block or sector
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7102863A NL7102863A (en) | 1971-03-04 | 1971-03-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE780146A true BE780146A (en) | 1972-09-04 |
Family
ID=19812612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE780146A BE780146A (en) | 1971-03-04 | 1972-03-02 | SPIRAL-STRUCTURED INFORMATION MEDIA IN WHICH SOUND INFORMATION AND / OR INFORMATION IS STORED |
Country Status (15)
| Country | Link |
|---|---|
| JP (2) | JPS544603B1 (en) |
| AR (2) | AR195275A1 (en) |
| AT (1) | AT342122B (en) |
| AU (1) | AU470672B2 (en) |
| BE (1) | BE780146A (en) |
| BR (1) | BR7201206D0 (en) |
| CA (1) | CA1023855A (en) |
| CH (2) | CH553522A (en) |
| ES (1) | ES400336A1 (en) |
| FR (1) | FR2128576B1 (en) |
| GB (1) | GB1391541A (en) |
| IT (1) | IT952884B (en) |
| NL (1) | NL7102863A (en) |
| NO (1) | NO139905C (en) |
| ZA (1) | ZA721137B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2197495A5 (en) * | 1972-08-25 | 1974-03-22 | Thomson Csf | |
| NL7212015A (en) * | 1972-09-04 | 1974-03-06 | ||
| FR2235354A1 (en) * | 1973-06-29 | 1975-01-24 | Thomson Csf | Photoelectric optical test sensor - measures displacement of a diffraction screen with constant spacing in the test sensor plane |
| NL7611567A (en) * | 1976-10-20 | 1978-04-24 | Philips Nv | METHOD OF MAKING COPIES OF TRACKS OF INFORMATION ON CARRIERS. |
| BE871326A (en) * | 1978-10-23 | 1979-04-17 | Mca Disco Vision | METHOD AND DEVICE FOR RECORDING AND REPRODUCING A VIDEO SIGNAL. |
-
1971
- 1971-03-04 NL NL7102863A patent/NL7102863A/xx not_active Application Discontinuation
-
1972
- 1972-02-21 ZA ZA721137A patent/ZA721137B/en unknown
- 1972-02-29 AU AU39454/72A patent/AU470672B2/en not_active Expired
- 1972-03-01 CH CH298372A patent/CH553522A/en not_active IP Right Cessation
- 1972-03-01 GB GB948772A patent/GB1391541A/en not_active Expired
- 1972-03-01 BR BR1206/72*[A patent/BR7201206D0/en unknown
- 1972-03-01 CH CH509273A patent/CH552920A/en not_active IP Right Cessation
- 1972-03-01 NO NO646/72A patent/NO139905C/en unknown
- 1972-03-01 AT AT166672A patent/AT342122B/en not_active IP Right Cessation
- 1972-03-01 IT IT67654/72A patent/IT952884B/en active
- 1972-03-01 JP JP2068372A patent/JPS544603B1/ja active Pending
- 1972-03-02 BE BE780146A patent/BE780146A/en not_active IP Right Cessation
- 1972-03-02 CA CA136,033A patent/CA1023855A/en not_active Expired
- 1972-03-02 ES ES400336A patent/ES400336A1/en not_active Expired
- 1972-03-03 FR FR7207419A patent/FR2128576B1/fr not_active Expired
- 1972-03-03 AR AR240808A patent/AR195275A1/en active
-
1973
- 1973-03-28 AR AR247284A patent/AR203718A1/en active
-
1978
- 1978-08-11 JP JP9746078A patent/JPS5452504A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AT342122B (en) | 1978-03-10 |
| ZA721137B (en) | 1973-10-31 |
| AR195275A1 (en) | 1973-09-28 |
| IT952884B (en) | 1973-07-30 |
| JPS5732409B2 (en) | 1982-07-10 |
| CA1023855A (en) | 1978-01-03 |
| NO139905C (en) | 1979-05-30 |
| NO139905B (en) | 1979-02-19 |
| CH553522A (en) | 1974-08-30 |
| DE2208379B2 (en) | 1976-10-28 |
| ATA166672A (en) | 1977-07-15 |
| AU470672B2 (en) | 1973-08-30 |
| NL7102863A (en) | 1972-09-06 |
| GB1391541A (en) | 1975-04-23 |
| FR2128576B1 (en) | 1980-03-14 |
| AU3945472A (en) | 1973-08-30 |
| JPS544603B1 (en) | 1979-03-08 |
| DE2208379A1 (en) | 1972-09-14 |
| ES400336A1 (en) | 1975-06-16 |
| JPS5452504A (en) | 1979-04-25 |
| AR203718A1 (en) | 1975-10-15 |
| CH552920A (en) | 1974-08-15 |
| FR2128576A1 (en) | 1972-10-20 |
| BR7201206D0 (en) | 1973-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE20 | Patent expired |
Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN Effective date: 19920302 |