IT8321112A1 - Dispositivo opto-elettronico per la rivelazione di errori di focalizzazione - Google Patents
Dispositivo opto-elettronico per la rivelazione di errori di focalizzazioneInfo
- Publication number
- IT8321112A1 IT8321112A1 IT1983A21112A IT2111283A IT8321112A1 IT 8321112 A1 IT8321112 A1 IT 8321112A1 IT 1983A21112 A IT1983A21112 A IT 1983A21112A IT 2111283 A IT2111283 A IT 2111283A IT 8321112 A1 IT8321112 A1 IT 8321112A1
- Authority
- IT
- Italy
- Prior art keywords
- opto
- detection
- electronic device
- focusing errors
- focusing
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title 1
- 230000005693 optoelectronics Effects 0.000 title 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/16—Beam splitting or combining systems used as aids for focusing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
- G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
-
- 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
- G11B7/0916—Foucault or knife-edge methods
-
- 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
- G11B7/1359—Single prisms
-
- 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
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8202058A NL8202058A (nl) | 1982-05-19 | 1982-05-19 | Opto-elektronisch fokusfout-detektiestelsel. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| IT8321112A0 IT8321112A0 (it) | 1983-05-13 |
| IT8321112A1 true IT8321112A1 (it) | 1984-11-13 |
| IT1171671B IT1171671B (it) | 1987-06-10 |
Family
ID=19839755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT21112/83A IT1171671B (it) | 1982-05-19 | 1983-05-13 | Dispositivo opto elettronico per la rivelazione di errori di focolizzazione |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US4533826A (it) |
| JP (1) | JPS58208946A (it) |
| KR (1) | KR880001707B1 (it) |
| AT (1) | AT376509B (it) |
| AU (1) | AU556995B2 (it) |
| BE (1) | BE896768A (it) |
| CA (1) | CA1200607A (it) |
| CH (1) | CH661802A5 (it) |
| DE (1) | DE3315220C2 (it) |
| ES (1) | ES8403231A1 (it) |
| FR (1) | FR2527370B1 (it) |
| GB (1) | GB2120493B (it) |
| HK (1) | HK28386A (it) |
| IT (1) | IT1171671B (it) |
| NL (1) | NL8202058A (it) |
| SE (2) | SE451789B (it) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135150A (en) * | 1983-02-15 | 1984-08-22 | Gen Electric | Optical inspection system |
| JPS59158029A (ja) * | 1983-02-28 | 1984-09-07 | 松下電工株式会社 | 反射型光電スイツチ |
| 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 |
| FR2546310B1 (fr) * | 1983-05-20 | 1986-04-25 | Thomson Csf | Monture reglable pour miroir pivotant et tete optique d'enregistrement-lecture utilisant une telle monture |
| US4645351A (en) * | 1983-06-01 | 1987-02-24 | Fuji Photo Film Co., Ltd. | Methods and apparatus for discriminating between the front and back surfaces of films |
| JPS618744A (ja) * | 1984-06-22 | 1986-01-16 | Fuji Photo Film Co Ltd | 光デイスク装置のフオ−カス誤差検出装置 |
| JPH0633537Y2 (ja) * | 1984-06-30 | 1994-08-31 | ソニ−株式会社 | 感光性半導体装置 |
| DE3546795C2 (it) | 1984-10-01 | 1993-09-23 | Mitsubishi Denki K.K., Tokio/Tokyo, Jp | |
| NL8403034A (nl) * | 1984-10-05 | 1986-05-01 | Philips Nv | Opto-elektronisch fokusfout-detektiestelsel. |
| US5416755A (en) * | 1985-02-28 | 1995-05-16 | Canon Kabushiki Kaisha | Optical pickup using split beams impinging on different photo-detector areas |
| NL8501489A (nl) * | 1985-05-24 | 1986-12-16 | Philips Nv | Positie-gevoelige stralingsdetector. |
| NL8502802A (nl) * | 1985-10-14 | 1987-05-04 | Philips Nv | Inrichting voor het uitlezen en/of inschrijven van een optische spoorvormige informatiestruktuur. |
| US5231621A (en) * | 1986-09-05 | 1993-07-27 | Canon Kabushiki Kaisha | Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point |
| JPH0734264B2 (ja) * | 1986-09-05 | 1995-04-12 | キヤノン株式会社 | 光学式情報記録再生装置 |
| JPH0626972Y2 (ja) * | 1986-10-03 | 1994-07-20 | パイオニア株式会社 | 光学式ピツクアツプ装置 |
| DE3635840A1 (de) * | 1986-10-22 | 1988-05-05 | Thomson Brandt Gmbh | Mit strahlen abtastendes abtastsystem |
| NL8700440A (nl) * | 1987-02-23 | 1988-09-16 | Philips Nv | Optische inrichting bevattende een houder met daarin aangebracht een optisch stelsel. |
| NL8702245A (nl) * | 1987-09-21 | 1989-04-17 | Philips Nv | Inrichting voor het met optische straling aftasten van een stralingsreflekterend informatievlak. |
| GB8724575D0 (en) * | 1987-10-20 | 1987-11-25 | Renishaw Plc | Focus detection system |
| JPH01151022A (ja) * | 1987-12-09 | 1989-06-13 | Sharp Corp | 光ピックアップ装置 |
| JP2701324B2 (ja) * | 1988-06-16 | 1998-01-21 | ソニー株式会社 | 光学ヘッド装置 |
| JPH0231337A (ja) * | 1988-07-21 | 1990-02-01 | Mitsubishi Electric Corp | 焦点誤差検出装置 |
| NL8802689A (nl) * | 1988-11-03 | 1990-06-01 | Koninkl Philips Electronics Nv | Inrichting voor het met optische straling aftasten van een stralingsreflekterend oppervlak. |
| NL9002841A (nl) * | 1990-12-21 | 1992-07-16 | Philips Nv | Werkwijze en inrichting voor het langs optische weg inschrijven, uitlezen, en wissen van een meervlaks registratiedrager, en registratiedrager geschikt voor deze werkwijze en inrichting. |
| US5281802A (en) * | 1991-02-20 | 1994-01-25 | Ricoh Company, Ltd. | Focus error signal detection device with separating prism |
| TW221074B (it) * | 1991-05-10 | 1994-02-11 | Philips Nv | |
| KR100301572B1 (ko) * | 1999-04-28 | 2001-09-26 | 김영수 | 광전자식 개폐기 |
| JP3765235B2 (ja) * | 2001-02-16 | 2006-04-12 | 日本電気株式会社 | 光ディスク装置 |
| AU2003214652A1 (en) * | 2002-03-20 | 2003-09-29 | Matsushita Electric Industrial Co., Ltd. | Control method for focus and tracking in pickup apparatus |
| JP6010505B2 (ja) * | 2013-06-11 | 2016-10-19 | 浜松ホトニクス株式会社 | 画像取得装置及び画像取得装置のフォーカス方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7803969A (nl) * | 1978-04-14 | 1979-10-16 | Philips Nv | Opto-elektronisch fokusfout-detektiestelsel. |
| NL7809635A (nl) * | 1978-09-22 | 1980-03-25 | Philips Nv | Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur. |
| NL7907216A (nl) * | 1979-09-28 | 1981-03-31 | Philips Nv | Optisch fokusfout-detektiestelsel. |
| JPS56170537U (it) * | 1980-05-16 | 1981-12-16 | ||
| JPS5733441A (en) * | 1980-08-07 | 1982-02-23 | Matsushita Electric Ind Co Ltd | Optical information recorder and reproducer |
| JPS5753831A (en) * | 1980-09-12 | 1982-03-31 | Olympus Optical Co Ltd | Method and device for reproduction of optical information |
| JPS57108811A (en) * | 1980-12-26 | 1982-07-07 | Hitachi Ltd | Optical focus position detector |
| JPS57195634U (it) * | 1981-06-05 | 1982-12-11 |
-
1982
- 1982-05-19 NL NL8202058A patent/NL8202058A/nl not_active Application Discontinuation
- 1982-08-26 US US06/411,734 patent/US4533826A/en not_active Expired - Lifetime
-
1983
- 1983-04-27 DE DE3315220A patent/DE3315220C2/de not_active Expired
- 1983-05-06 GB GB08312580A patent/GB2120493B/en not_active Expired
- 1983-05-12 CA CA000428005A patent/CA1200607A/en not_active Expired
- 1983-05-13 IT IT21112/83A patent/IT1171671B/it active
- 1983-05-16 KR KR1019830002127A patent/KR880001707B1/ko not_active IP Right Cessation
- 1983-05-16 AT AT0178183A patent/AT376509B/de not_active IP Right Cessation
- 1983-05-16 FR FR8308050A patent/FR2527370B1/fr not_active Expired
- 1983-05-16 JP JP58084286A patent/JPS58208946A/ja active Granted
- 1983-05-16 SE SE8302743A patent/SE451789B/sv not_active IP Right Cessation
- 1983-05-16 CH CH2684/83A patent/CH661802A5/de not_active IP Right Cessation
- 1983-05-16 AU AU14552/83A patent/AU556995B2/en not_active Ceased
- 1983-05-16 SE SE8302743D patent/SE8302743L/xx not_active Application Discontinuation
- 1983-05-17 BE BE0/210792A patent/BE896768A/fr not_active IP Right Cessation
- 1983-05-17 ES ES522477A patent/ES8403231A1/es not_active Expired
-
1986
- 1986-04-17 HK HK283/86A patent/HK28386A/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US4533826A (en) | 1985-08-06 |
| NL8202058A (nl) | 1983-12-16 |
| IT1171671B (it) | 1987-06-10 |
| KR880001707B1 (ko) | 1988-09-07 |
| FR2527370A1 (fr) | 1983-11-25 |
| SE451789B (sv) | 1987-10-26 |
| DE3315220A1 (de) | 1983-11-24 |
| CA1200607A (en) | 1986-02-11 |
| AU556995B2 (en) | 1986-11-27 |
| HK28386A (en) | 1986-04-25 |
| FR2527370B1 (fr) | 1985-10-31 |
| ES522477A0 (es) | 1984-03-01 |
| AU1455283A (en) | 1983-11-24 |
| ATA178183A (de) | 1984-04-15 |
| AT376509B (de) | 1984-11-26 |
| GB8312580D0 (en) | 1983-06-08 |
| JPS58208946A (ja) | 1983-12-05 |
| BE896768A (fr) | 1983-11-17 |
| GB2120493A (en) | 1983-11-30 |
| IT8321112A0 (it) | 1983-05-13 |
| SE8302743L (sv) | 1983-11-20 |
| GB2120493B (en) | 1985-10-02 |
| ES8403231A1 (es) | 1984-03-01 |
| CH661802A5 (de) | 1987-08-14 |
| DE3315220C2 (de) | 1984-11-15 |
| JPH0353700B2 (it) | 1991-08-15 |
| SE8302743D0 (sv) | 1983-05-16 |
| KR840004972A (ko) | 1984-10-31 |
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