DE3166595D1 - Apparatus and method for controlling focus in a recording system - Google Patents
Apparatus and method for controlling focus in a recording systemInfo
- Publication number
- DE3166595D1 DE3166595D1 DE8181105480T DE3166595T DE3166595D1 DE 3166595 D1 DE3166595 D1 DE 3166595D1 DE 8181105480 T DE8181105480 T DE 8181105480T DE 3166595 T DE3166595 T DE 3166595T DE 3166595 D1 DE3166595 D1 DE 3166595D1
- Authority
- DE
- Germany
- Prior art keywords
- duty cycle
- signal
- focus
- focusing lens
- recording
- Prior art date
- 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
- 230000003534 oscillatory effect Effects 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 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
- 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
- G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
-
- 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
- G11B7/0045—Recording
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/167,941 US4358774A (en) | 1980-07-14 | 1980-07-14 | Apparatus and method for controlling focus in a recording system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3166595D1 true DE3166595D1 (en) | 1984-11-15 |
Family
ID=22609449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8181105480T Expired DE3166595D1 (en) | 1980-07-14 | 1981-07-13 | Apparatus and method for controlling focus in a recording system |
Country Status (10)
Country | Link |
---|---|
US (1) | US4358774A (de) |
EP (1) | EP0044072B1 (de) |
JP (1) | JPS5730129A (de) |
AT (1) | ATE9861T1 (de) |
AU (1) | AU539974B2 (de) |
BR (1) | BR8104448A (de) |
CA (1) | CA1155219A (de) |
DE (1) | DE3166595D1 (de) |
HK (1) | HK50886A (de) |
MY (1) | MY8700153A (de) |
Families Citing this family (47)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57189348A (en) * | 1981-05-14 | 1982-11-20 | Olympus Optical Co Ltd | Auto-focus system of optical disk |
US4459690A (en) * | 1981-07-30 | 1984-07-10 | Rca Corporation | Multi-beam optical record and playback apparatus having an improved beam splitter |
EP0095852A1 (de) * | 1982-05-19 | 1983-12-07 | BURROUGHS CORPORATION (a Michigan corporation) | Einrichtung zur Fokussierregelung für ein optisches Speichersystem |
US4538257A (en) * | 1982-12-23 | 1985-08-27 | Xerox Corporation | Adaptively stabilized recording for direct read after write optical memories |
FR2546325B1 (fr) * | 1983-05-20 | 1988-07-08 | Thomson Csf | Procede et dispositif de calibration de la puissance optique appliquee a un disque optique pour l'enregistrement de donnees |
US4677605A (en) * | 1984-07-06 | 1987-06-30 | Storage Technology Partners Ii | Focus acquisition and maintenance for optical disk system |
US4613876A (en) * | 1984-11-28 | 1986-09-23 | Ncr Corporation | Laser recording system |
US4949329A (en) * | 1985-05-21 | 1990-08-14 | Hoechst Celanese Corp. | Method of effecting erasure of optical information media including varying duty cycle, laser power and focus offset |
DE3650466T2 (de) * | 1985-09-02 | 1996-08-08 | Sharp Kk | Wiedergabegerät für optische Platten |
JPH0668581B2 (ja) * | 1985-10-08 | 1994-08-31 | 東芝機械株式会社 | レ−ザ描画装置の焦点位置調整装置 |
DE3732903A1 (de) * | 1987-09-30 | 1989-04-13 | Thomson Brandt Gmbh | Optische abtastvorrichtung |
JP2764960B2 (ja) * | 1988-11-16 | 1998-06-11 | 松下電器産業株式会社 | 記録再生方法 |
US4972397A (en) * | 1988-12-02 | 1990-11-20 | Drexler Technology Corporation | Dithering optical data logger |
JPH03171437A (ja) * | 1989-11-30 | 1991-07-24 | Matsushita Electric Ind Co Ltd | 信号記録方法と最適パワー設定装置 |
EP0453161A3 (en) * | 1990-04-10 | 1992-07-08 | Seiko Epson Corporation | Optical recording apparatus |
US5493549A (en) * | 1990-04-10 | 1996-02-20 | Seiko Epson Corporation | Optical recording regeneration apparatus with compensation circuit |
US5978329A (en) * | 1995-06-07 | 1999-11-02 | Discovision Associates | Technique for closed loop servo operation in optical disc tracking control |
US6215118B1 (en) * | 1995-11-02 | 2001-04-10 | Agilent Technologies, Inc. | Autoalignment and autofocus mechanism for coupling light between an optical fiber and a physical specimen |
EP0777218B1 (de) * | 1995-12-06 | 2001-05-16 | Discovision Associates | Gerät und Verfahren zum Regeln der Fokussierung |
US5757743A (en) * | 1996-04-01 | 1998-05-26 | International Business Machines Corporation | Electric circuit for providing a position indicator signal in a system for multilayer optical disk storage |
US6128267A (en) * | 1996-04-01 | 2000-10-03 | International Business Machines Corporation | Active tracking method for optical disk storage |
US5740145A (en) * | 1996-04-01 | 1998-04-14 | International Business Machines Corporation | Active focus alignment system for multilayer optical disk storage based on dither frequency doubling |
US5689485A (en) | 1996-04-01 | 1997-11-18 | Discovision Associates | Tracking control apparatus and method |
US5754515A (en) * | 1996-04-01 | 1998-05-19 | International Business Machines Corporation | Active alignment method for multilayer optical disk storage |
US5793718A (en) * | 1996-04-01 | 1998-08-11 | International Business Machines Corporation | Active tracking system for optical disk storage |
US5684782A (en) * | 1996-04-01 | 1997-11-04 | International Business Machines Corporation | Use of a laser light source as a detector via a dithering modulation |
US5872723A (en) * | 1998-02-13 | 1999-02-16 | International Business Machines Corporation | In a system for creating, reading and writing on rotatable information storage media an apparatus for determining drive mechanism aging characteristics |
US6097677A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for combined writing and reading operations |
US6088309A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for controlling vertical laser alignment |
US6049512A (en) * | 1998-02-13 | 2000-04-11 | International Business Machines Corporation | In a system for creating, reading and writing on rotatable information storage media, an apparatus for two-sided writing |
US6118740A (en) * | 1998-02-13 | 2000-09-12 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for writing closely spaced information tracks |
US6088308A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a tracking circuit for providing positioning information |
US6046970A (en) * | 1998-02-13 | 2000-04-04 | International Business Machines Corporation | System for creating, reading and writing on rotatable storage media, an apparatus for determining laser aging characteristics |
US5892739A (en) * | 1998-02-13 | 1999-04-06 | International Business Machines Corporation | In system for creating reading and writing on rotatable information storage media, an apparatus for multilayer source positioning using the laser source as a detector |
US6222813B1 (en) | 1998-02-13 | 2001-04-24 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling vertical laser alignment |
US6081489A (en) * | 1998-02-13 | 2000-06-27 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for performing both read and write operations |
US6034929A (en) * | 1998-02-13 | 2000-03-07 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for multi-layer laser source positioning |
US6128262A (en) * | 1998-02-13 | 2000-10-03 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for customizing said media with timing information |
US6088306A (en) * | 1998-02-13 | 2000-07-11 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for combined writing and reading operations |
US6111830A (en) * | 1998-02-13 | 2000-08-29 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining linear and/or angular velocity |
US6232045B1 (en) | 1998-02-13 | 2001-05-15 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, a method for producing a recording blank |
US6108282A (en) * | 1998-02-13 | 2000-08-22 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for multilayer laser source positioning |
US6081487A (en) * | 1998-02-13 | 2000-06-27 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for controlling laser positioning |
US6097681A (en) * | 1998-02-13 | 2000-08-01 | International Business Machines Corporation | System for creating, reading and writing on rotatable information storage media, an apparatus for determining angular position, θ |
JP2001023174A (ja) * | 1999-06-25 | 2001-01-26 | Samsung Electronics Co Ltd | チルト及び/または集束ずれ補償方法及びその装置 |
TWI240919B (en) * | 2003-07-04 | 2005-10-01 | Mediatek Inc | Write signals control circuit in a disk drive |
US20120057443A1 (en) * | 2009-05-18 | 2012-03-08 | Akira Shirota | Information recording apparatus, information recording method, and computer program |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2251876B1 (de) * | 1973-11-16 | 1977-09-23 | Thomson Brandt | |
US3932700A (en) * | 1974-02-04 | 1976-01-13 | Zenith Radio Corporation | Focus tracking registration for optical reproducing systems |
AR205839A1 (es) * | 1974-09-30 | 1976-06-07 | Mca Disco Vision | Servodisposicion para recorrer opticamente y leer simultaneamente un canal de informacion almacenado en un disco de video |
DE2458917C3 (de) * | 1974-12-12 | 1981-12-03 | Thomson-Brandt, 75008 Paris | Regelanordnung für die Fokussierung eines Leselichtbündels |
JPS598892B2 (ja) * | 1975-06-19 | 1984-02-28 | ソニー株式会社 | 信号の光学的記録再生装置 |
NL7600479A (nl) * | 1976-01-19 | 1977-07-21 | Philips Nv | Automatisch optisch focusseersysteem. |
NL7600843A (nl) * | 1976-01-28 | 1977-08-01 | Philips Nv | Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht. |
NL186205C (nl) * | 1977-12-17 | 1990-10-01 | Victor Company Of Japan | Inrichting voor het optisch registreren van signalen op een registratiemedium. |
-
1980
- 1980-07-14 US US06/167,941 patent/US4358774A/en not_active Expired - Lifetime
-
1981
- 1981-04-16 CA CA000375671A patent/CA1155219A/en not_active Expired
- 1981-05-14 AU AU70573/81A patent/AU539974B2/en not_active Ceased
- 1981-05-20 JP JP7508181A patent/JPS5730129A/ja active Granted
- 1981-07-13 EP EP81105480A patent/EP0044072B1/de not_active Expired
- 1981-07-13 AT AT81105480T patent/ATE9861T1/de not_active IP Right Cessation
- 1981-07-13 BR BR8104448A patent/BR8104448A/pt unknown
- 1981-07-13 DE DE8181105480T patent/DE3166595D1/de not_active Expired
-
1986
- 1986-07-03 HK HK508/86A patent/HK50886A/xx unknown
-
1987
- 1987-12-30 MY MY153/87A patent/MY8700153A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
MY8700153A (en) | 1987-12-31 |
CA1155219A (en) | 1983-10-11 |
EP0044072B1 (de) | 1984-10-10 |
BR8104448A (pt) | 1982-03-30 |
JPS5730129A (en) | 1982-02-18 |
ATE9861T1 (de) | 1984-10-15 |
US4358774A (en) | 1982-11-09 |
AU7057381A (en) | 1982-01-21 |
JPS6232526B2 (de) | 1987-07-15 |
HK50886A (en) | 1986-07-11 |
EP0044072A1 (de) | 1982-01-20 |
AU539974B2 (en) | 1984-10-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3166595D1 (en) | Apparatus and method for controlling focus in a recording system | |
EP0155077B1 (de) | Servosystem | |
US5029155A (en) | Optical information recording/reproducing apparatus in which recording power is set prior to recording | |
ES8102395A1 (es) | Un aparato para explorar opticamente un soporte de registro | |
JPS57208642A (en) | Focus controller | |
DK67990D0 (da) | Fremgangsmaade og kredsloebsanordning til kompensation af offsetspaendinger i et fokus- og/eller sporreguleringskredsloeb | |
KR910001668A (ko) | 방사 센스티브 층을 갖는 기록매체상에 정보를 기록하기 위한 장치 | |
KR850001654B1 (ko) | 기록시스템에서의 촛점 조절장치 | |
EP0327090A3 (de) | Optisches Aufnahme/Wiedergabegerät | |
JPS5847770B2 (ja) | ジドウシヨウテンイチケンシユツソウチ | |
EP0373607B1 (de) | Fokusfehlerermittlungsschaltung | |
EP0157020B1 (de) | Vorrichtung zur genauen Fokussierung eines Laserstrahls | |
DK596387D0 (da) | Apparat til indlaesning i og/eller aflaesning fra en skiveformet registreringsbaerer | |
US6728171B2 (en) | Arrangements for correction of focusing light beam, and system using the same | |
JPS57200912A (en) | Information recording system | |
HK42796A (en) | Apparatus for the reproduction of data | |
JPS54103004A (en) | Optically recording and reproducing apparatus | |
JPS54102109A (en) | Focusing method of optical recorder | |
JPS5532245A (en) | Optical recorder and reproducing device | |
JPS6132228A (ja) | トラツキングエラ−信号検出方式 | |
SU1679542A1 (ru) | Устройство дл оптической записи-воспроизведени | |
JPS5486302A (en) | Optical recorder-reproducer | |
JPS5522235A (en) | Optical reproducing device | |
JPS5443756A (en) | Optically recording and reproducing apparatus | |
JPH05128565A (ja) | 光デイスクのトラツキング制御装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |