SE437579B - Apparat for avlesning av en optisk uppteckningsberare med en stralningsreflekterande informationsstruktur - Google Patents
Apparat for avlesning av en optisk uppteckningsberare med en stralningsreflekterande informationsstrukturInfo
- Publication number
- SE437579B SE437579B SE7907748A SE7907748A SE437579B SE 437579 B SE437579 B SE 437579B SE 7907748 A SE7907748 A SE 7907748A SE 7907748 A SE7907748 A SE 7907748A SE 437579 B SE437579 B SE 437579B
- Authority
- SE
- Sweden
- Prior art keywords
- focusing
- reading
- radiation
- plane
- reading beam
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims description 23
- 230000005855 radiation Effects 0.000 claims description 40
- 230000010287 polarization Effects 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 210000001747 pupil Anatomy 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000001154 acute effect Effects 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 230000005693 optoelectronics Effects 0.000 claims 1
- 239000010902 straw Substances 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- 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
- G11B7/0908—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 for focusing only
-
- 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
- G11B7/0908—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 for focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- G11B7/0908—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 for focusing only
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
- G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Automatic Focus Adjustment (AREA)
- Facsimile Scanning Arrangements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7809635A NL7809635A (nl) | 1978-09-22 | 1978-09-22 | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7907748L SE7907748L (sv) | 1980-03-23 |
| SE437579B true SE437579B (sv) | 1985-03-04 |
Family
ID=19831595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7907748A SE437579B (sv) | 1978-09-22 | 1979-09-19 | Apparat for avlesning av en optisk uppteckningsberare med en stralningsreflekterande informationsstruktur |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US4253019A (de) |
| JP (1) | JPS5545200A (de) |
| AR (1) | AR223848A1 (de) |
| AU (1) | AU530291B2 (de) |
| BE (1) | BE878905A (de) |
| BR (1) | BR7905978A (de) |
| CA (1) | CA1123640A (de) |
| DD (1) | DD146118A5 (de) |
| DE (1) | DE2937427A1 (de) |
| DK (1) | DK391279A (de) |
| ES (1) | ES484316A1 (de) |
| FR (1) | FR2437043B1 (de) |
| GB (1) | GB2033187B (de) |
| IT (1) | IT1165709B (de) |
| NL (1) | NL7809635A (de) |
| SE (1) | SE437579B (de) |
| ZA (1) | ZA794547B (de) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55153142A (en) * | 1979-05-15 | 1980-11-28 | Olympus Optical Co Ltd | Magnetic recording and reproducing device |
| CA1132258A (en) * | 1980-05-12 | 1982-09-21 | Herman W. Willemsen | Scanning head for an optical disc system |
| US4494226A (en) * | 1981-10-15 | 1985-01-15 | Burroughs Corporation | Three beam optical memory system |
| US4402061A (en) * | 1981-10-15 | 1983-08-30 | Burroughs Corporation | Preformatted optical media for use in an optical memory system |
| US4451914A (en) * | 1982-04-15 | 1984-05-29 | Burroughs Corporation | Optical storage system employing a multi-layer optical medium |
| US4451915A (en) * | 1982-04-15 | 1984-05-29 | Burroughs Corporation | Optical storage system employing a multi-layer optical medium |
| NL8202058A (nl) * | 1982-05-19 | 1983-12-16 | Philips Nv | Opto-elektronisch fokusfout-detektiestelsel. |
| US4674076A (en) * | 1982-05-19 | 1987-06-16 | Burroughs Corporation | Optical memory system having improved positioning and focusing control circuitry |
| US4669074A (en) * | 1982-05-19 | 1987-05-26 | Burroughs Corporation | Focusing control circuitry for an optical memory system |
| GB2122835B (en) * | 1982-06-30 | 1986-08-06 | Eastman Kodak Co | Rangefinder |
| JPS59119548A (ja) * | 1982-12-25 | 1984-07-10 | Pioneer Electronic Corp | 光学式ピツクアツプ装置 |
| GB2135150A (en) * | 1983-02-15 | 1984-08-22 | Gen Electric | Optical inspection system |
| JPS59162514A (ja) * | 1983-03-08 | 1984-09-13 | Dainippon Screen Mfg Co Ltd | 画像走査記録装置における焦点調整方法 |
| US4891799A (en) * | 1987-03-13 | 1990-01-02 | Fuji Electrochemical Co., Ltd. | Optical head apparatus for writing and reading data on an optical disk having a lens with an inclined optical axis |
| JPH03225650A (ja) * | 1990-01-31 | 1991-10-04 | Sony Corp | 光ディスクシステム |
| US5748598A (en) * | 1995-12-22 | 1998-05-05 | Massachusetts Institute Of Technology | Apparatus and methods for reading multilayer storage media using short coherence length sources |
| US5757763A (en) * | 1994-07-12 | 1998-05-26 | Massachusetts Institute Of Technology | Optical information storage via amplitude modulation |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2222665B1 (de) * | 1973-03-21 | 1975-10-31 | Thomson Brandt | |
| FR2235448B1 (de) * | 1973-06-29 | 1976-05-07 | Thomson Brandt | |
| NL7402504A (nl) * | 1974-02-25 | 1975-08-27 | Philips Nv | Inrichting voor het langs optische weg uitlezen van een registratiedrager. |
| FR2306495A1 (fr) * | 1975-04-04 | 1976-10-29 | Thomson Brandt | Systeme de lecture d'un enregistrement par exploration optique ponctuelle d'une piste diffractante |
| NL7506495A (nl) * | 1975-06-02 | 1976-12-06 | Philips Nv | Inrichting voor het uitlezen van een registratie- drager. |
| FR2313716A1 (fr) * | 1975-06-03 | 1976-12-31 | Thomson Brandt | Systeme optique de lecture par reflexion d'un support d'information |
| JPS5332272A (en) * | 1976-09-07 | 1978-03-27 | Komatsu Forklift Kk | Interlock device between oil pressure system brake and mechanical system brake |
| NL7706753A (nl) * | 1977-03-23 | 1978-12-22 | Philips Nv | Inrichting voor het uitlezen van een optische stralingsreflekterende informatiedrager. |
| NL7703123A (nl) * | 1977-03-23 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager. |
-
1978
- 1978-09-22 NL NL7809635A patent/NL7809635A/nl not_active Application Discontinuation
- 1978-12-11 US US05/968,644 patent/US4253019A/en not_active Expired - Lifetime
-
1979
- 1979-08-28 ZA ZA00794547A patent/ZA794547B/xx unknown
- 1979-09-06 AR AR277977A patent/AR223848A1/es active
- 1979-09-13 CA CA335,578A patent/CA1123640A/en not_active Expired
- 1979-09-15 DE DE19792937427 patent/DE2937427A1/de active Granted
- 1979-09-18 AU AU50936/79A patent/AU530291B2/en not_active Ceased
- 1979-09-19 IT IT68838/79A patent/IT1165709B/it active
- 1979-09-19 BR BR7905978A patent/BR7905978A/pt unknown
- 1979-09-19 SE SE7907748A patent/SE437579B/sv not_active IP Right Cessation
- 1979-09-19 JP JP11947079A patent/JPS5545200A/ja active Granted
- 1979-09-19 GB GB7932504A patent/GB2033187B/en not_active Expired
- 1979-09-19 DK DK391279A patent/DK391279A/da unknown
- 1979-09-20 BE BE0/197241A patent/BE878905A/fr not_active IP Right Cessation
- 1979-09-20 ES ES484316A patent/ES484316A1/es not_active Expired
- 1979-09-20 DD DD79215678A patent/DD146118A5/de unknown
- 1979-09-21 FR FR7923575A patent/FR2437043B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DD146118A5 (de) | 1981-01-21 |
| CA1123640A (en) | 1982-05-18 |
| JPS624776B2 (de) | 1987-01-31 |
| AU5093679A (en) | 1980-03-27 |
| IT1165709B (it) | 1987-04-22 |
| DE2937427A1 (de) | 1980-04-10 |
| DE2937427C2 (de) | 1989-07-06 |
| DK391279A (da) | 1980-03-23 |
| IT7968838A0 (it) | 1979-09-19 |
| NL7809635A (nl) | 1980-03-25 |
| GB2033187A (en) | 1980-05-14 |
| FR2437043A1 (fr) | 1980-04-18 |
| BR7905978A (pt) | 1980-07-08 |
| AR223848A1 (es) | 1981-09-30 |
| GB2033187B (en) | 1983-01-19 |
| ZA794547B (en) | 1981-04-29 |
| BE878905A (fr) | 1980-03-20 |
| SE7907748L (sv) | 1980-03-23 |
| AU530291B2 (en) | 1983-07-07 |
| FR2437043B1 (fr) | 1985-07-12 |
| JPS5545200A (en) | 1980-03-29 |
| ES484316A1 (es) | 1980-05-16 |
| US4253019A (en) | 1981-02-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
Ref document number: 7907748-3 Effective date: 19891003 Format of ref document f/p: F |