NO761848L - - Google Patents
Info
- Publication number
- NO761848L NO761848L NO761848A NO761848A NO761848L NO 761848 L NO761848 L NO 761848L NO 761848 A NO761848 A NO 761848A NO 761848 A NO761848 A NO 761848A NO 761848 L NO761848 L NO 761848L
- Authority
- NO
- Norway
- Prior art keywords
- radiation
- reading
- recording medium
- radiation source
- laser
- Prior art date
Links
- 230000005855 radiation Effects 0.000 claims description 91
- 230000010287 polarization Effects 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000011896 sensitive detection Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- 230000003287 optical effect Effects 0.000 description 25
- 238000001514 detection method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
-
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7506495A NL7506495A (nl) | 1975-06-02 | 1975-06-02 | Inrichting voor het uitlezen van een registratie- drager. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO761848L true NO761848L (da) | 1976-12-03 |
Family
ID=19823856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO761848A NO761848L (da) | 1975-06-02 | 1976-05-31 |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US4337535A (da) |
| JP (1) | JPS51148405A (da) |
| AT (1) | AT351814B (da) |
| AU (1) | AU507538B2 (da) |
| BE (1) | BE842407A (da) |
| CA (1) | CA1082357A (da) |
| CH (1) | CH608124A5 (da) |
| DE (1) | DE2622560C2 (da) |
| DK (1) | DK236376A (da) |
| ES (1) | ES448356A1 (da) |
| FR (1) | FR2313732A1 (da) |
| GB (1) | GB1552355A (da) |
| IT (1) | IT1064284B (da) |
| NL (1) | NL7506495A (da) |
| NO (1) | NO761848L (da) |
| NZ (1) | NZ181001A (da) |
| SE (1) | SE7606098L (da) |
| ZA (1) | ZA762337B (da) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7809635A (nl) * | 1978-09-22 | 1980-03-25 | Philips Nv | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
| JPS5755547A (en) * | 1980-09-22 | 1982-04-02 | Olympus Optical Co Ltd | Information reader of photomagnetic recording medium |
| JPS57111843A (en) * | 1980-12-27 | 1982-07-12 | Canon Inc | Vertical magnetic reading optical system |
| EP0098076A1 (en) * | 1982-06-14 | 1984-01-11 | Nec Corporation | Beam access apparatus for optical disc system |
| JP2504734B2 (ja) * | 1983-11-08 | 1996-06-05 | シャープ株式会社 | 光磁気記憶装置の光学装置 |
| US4868742A (en) * | 1984-06-20 | 1989-09-19 | Convex Computer Corporation | Input/output bus for system which generates a new header parcel when an interrupted data block transfer between a computer and peripherals is resumed |
| US4734906A (en) * | 1984-07-06 | 1988-03-29 | Storage Technology Partners 11 | Optical disk recording and readout system having read, write and coarse light beams |
| US4643538A (en) * | 1984-07-06 | 1987-02-17 | Storage Technology Partners Ii | Combined beam cross-section correcting, collimating and de-astigmatizing optical system |
| JPS6124033A (ja) * | 1984-07-13 | 1986-02-01 | Sony Corp | 光学式ヘツドのトラツキング誤差検出装置 |
| JP2575099B2 (ja) * | 1984-10-04 | 1997-01-22 | ソニー株式会社 | 光学式ヘツドのトラツキング誤差検出装置 |
| US4835761A (en) * | 1985-11-20 | 1989-05-30 | Mitsubishi Denki Kabushiki Kaisha | Signal to noise ratio of optical head apparatus employing semiconductor laser beam source |
| US5606541A (en) * | 1992-11-13 | 1997-02-25 | International Business Machines Corporation | Switchable filter for modulating laser intensity and reducing laser feedback in an optical disk device |
| US20060250918A1 (en) * | 2005-05-06 | 2006-11-09 | Chih-Chin Hsu | High frequency modulation of a light beam in optical recording |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3534166A (en) * | 1967-08-04 | 1970-10-13 | Zenith Radio Corp | Television picture recording and replay system |
| US3787888A (en) * | 1969-12-30 | 1974-01-22 | Honeywell Inc | Recording apparatus with beam intensity control means |
| FR2077738A1 (da) * | 1970-02-10 | 1971-11-05 | Commissariat Energie Atomique | |
| US3696344A (en) * | 1970-02-19 | 1972-10-03 | Energy Conversion Devices Inc | Optical mass memory employing amorphous thin films |
| US3829622A (en) * | 1972-10-24 | 1974-08-13 | Mca Disco Vision | Video disc player with variably biased pneumatic head |
| FR2222665B1 (da) * | 1973-03-21 | 1975-10-31 | Thomson Brandt | |
| NL172111C (nl) * | 1973-07-02 | 1983-07-01 | Philips Nv | Registratiedrager waarop informatie is vastgelegd in een optische struktuur en inrichting voor het inschrijven van een dergelijke registratiedrager. |
| NL176314C (nl) * | 1974-02-15 | 1985-03-18 | Philips Nv | Inrichting voor het uitlezen van een registratiedrager waarop informatie is aangebracht in een optisch uitleesbare structuur. |
| NL7414776A (nl) * | 1974-11-13 | 1976-05-17 | Philips Nv | Inrichting voor het uitlezen van een registra- tiedrager met een optische informatiestruktuur. |
| US3983317A (en) * | 1974-12-09 | 1976-09-28 | Teletype Corporation | Astigmatizer for laser recording and reproducing system |
-
1975
- 1975-06-02 NL NL7506495A patent/NL7506495A/xx not_active Application Discontinuation
-
1976
- 1976-04-20 ZA ZA762337A patent/ZA762337B/xx unknown
- 1976-05-20 DE DE2622560A patent/DE2622560C2/de not_active Expired
- 1976-05-27 CA CA253,434A patent/CA1082357A/en not_active Expired
- 1976-05-28 GB GB22267/76A patent/GB1552355A/en not_active Expired
- 1976-05-28 DK DK236376A patent/DK236376A/da unknown
- 1976-05-29 ES ES448356A patent/ES448356A1/es not_active Expired
- 1976-05-31 BE BE167492A patent/BE842407A/xx unknown
- 1976-05-31 AU AU14452/76A patent/AU507538B2/en not_active Expired
- 1976-05-31 NZ NZ181001A patent/NZ181001A/xx unknown
- 1976-05-31 AT AT397176A patent/AT351814B/de not_active IP Right Cessation
- 1976-05-31 NO NO761848A patent/NO761848L/no unknown
- 1976-05-31 IT IT23802/76A patent/IT1064284B/it active
- 1976-05-31 SE SE7606098A patent/SE7606098L/xx unknown
- 1976-05-31 CH CH680376A patent/CH608124A5/xx not_active IP Right Cessation
- 1976-06-02 FR FR7616624A patent/FR2313732A1/fr active Granted
- 1976-06-02 JP JP51064460A patent/JPS51148405A/ja active Granted
-
1979
- 1979-02-14 US US06/012,099 patent/US4337535A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES448356A1 (es) | 1977-07-16 |
| JPS6228491B2 (da) | 1987-06-20 |
| DE2622560C2 (de) | 1986-10-23 |
| ZA762337B (en) | 1977-11-30 |
| NL7506495A (nl) | 1976-12-06 |
| ATA397176A (de) | 1979-01-15 |
| AU507538B2 (en) | 1980-02-21 |
| DE2622560A1 (de) | 1976-12-23 |
| FR2313732A1 (fr) | 1976-12-31 |
| GB1552355A (en) | 1979-09-12 |
| DK236376A (da) | 1976-12-03 |
| NZ181001A (en) | 1979-06-08 |
| BE842407A (fr) | 1976-12-01 |
| AU1445276A (en) | 1977-12-08 |
| AT351814B (de) | 1979-08-10 |
| FR2313732B1 (da) | 1981-06-26 |
| US4337535A (en) | 1982-06-29 |
| CH608124A5 (da) | 1978-12-15 |
| SE7606098L (sv) | 1976-12-03 |
| CA1082357A (en) | 1980-07-22 |
| JPS51148405A (en) | 1976-12-20 |
| IT1064284B (it) | 1985-02-18 |
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