JPS57113428A - Focus servo device - Google Patents
Focus servo deviceInfo
- Publication number
- JPS57113428A JPS57113428A JP55188178A JP18817880A JPS57113428A JP S57113428 A JPS57113428 A JP S57113428A JP 55188178 A JP55188178 A JP 55188178A JP 18817880 A JP18817880 A JP 18817880A JP S57113428 A JPS57113428 A JP S57113428A
- Authority
- JP
- Japan
- Prior art keywords
- gain
- diodes
- operational amplifier
- error signal
- servo
- 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.)
- Granted
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
- G11B7/08—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
- G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
-
- 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
- G02B27/40—Optical focusing aids
-
- 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
- G11B7/0909—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 by astigmatic methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55188178A JPS57113428A (en) | 1980-12-29 | 1980-12-29 | Focus servo device |
US06/333,390 US4475182A (en) | 1980-12-29 | 1981-12-22 | Focus servo control system for automatically adjusting a relative distance between an objective lens unit and a recording surface of an optical recording medium |
GB8138973A GB2090437B (en) | 1980-12-29 | 1981-12-24 | Focus servo device in an optical pickup system |
DE3151834A DE3151834C2 (de) | 1980-12-29 | 1981-12-29 | Servofokusvorrichtung für ein optisches Abnehmersystem |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55188178A JPS57113428A (en) | 1980-12-29 | 1980-12-29 | Focus servo device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57113428A true JPS57113428A (en) | 1982-07-14 |
JPS6244330B2 JPS6244330B2 (US06277897-20010821-C00009.png) | 1987-09-19 |
Family
ID=16219125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55188178A Granted JPS57113428A (en) | 1980-12-29 | 1980-12-29 | Focus servo device |
Country Status (4)
Country | Link |
---|---|
US (1) | US4475182A (US06277897-20010821-C00009.png) |
JP (1) | JPS57113428A (US06277897-20010821-C00009.png) |
DE (1) | DE3151834C2 (US06277897-20010821-C00009.png) |
GB (1) | GB2090437B (US06277897-20010821-C00009.png) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5938936A (ja) * | 1982-08-28 | 1984-03-03 | Sony Corp | 情報再生装置のサ−ボコントロ−ル回路 |
FR2536196A1 (fr) * | 1982-11-11 | 1984-05-18 | Sony Corp | Circuit de servocommande d'alignement destine a un appareil de reproduction optique |
US4651314A (en) * | 1984-09-14 | 1987-03-17 | Olympus Optical Co., Ltd. | Optical recording and reproducing equipment |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57186239A (en) * | 1981-05-11 | 1982-11-16 | Sony Corp | Disc reproducing device |
JPS58128031A (ja) * | 1982-01-24 | 1983-07-30 | Sony Corp | デイスク再生装置 |
JPS58200473A (ja) * | 1982-05-19 | 1983-11-22 | Pioneer Video Kk | 情報読取装置 |
EP0095766B1 (en) * | 1982-05-31 | 1986-10-22 | Hitachi, Ltd. | Servo circuit for a signal reproducing apparatus |
JPH0677326B2 (ja) * | 1982-07-24 | 1994-09-28 | パイオニア株式会社 | 情報読取装置のフォ−カスサ−ボ装置 |
EP0116753B1 (en) * | 1982-12-07 | 1987-06-24 | Secretary of State for Trade and Industry in Her Britannic Majesty's Gov. of the U.K. of Great Britain and Northern Ireland | Improvements in or relating to apparatus to focus light on a surface |
JPS59116939A (ja) * | 1982-12-23 | 1984-07-06 | Olympus Optical Co Ltd | 光学式記録再生装置 |
JPS59116942A (ja) * | 1982-12-23 | 1984-07-06 | Olympus Optical Co Ltd | オ−トフォ−カス装置 |
JPS6074129A (ja) * | 1983-09-30 | 1985-04-26 | Sony Corp | 光学式デイスクのトラツキングサ−ボ回路 |
JPS6095733A (ja) * | 1983-10-31 | 1985-05-29 | Hitachi Ltd | 光学的信号処理装置 |
JPH0734287B2 (ja) * | 1984-05-08 | 1995-04-12 | ソニー株式会社 | 光学式ディスク装置の起動制御方法 |
EP0165324B1 (de) * | 1984-06-18 | 1988-05-25 | DR.-ING. RUDOLF HELL GmbH | Verfahren und Einrichtung zur akustischen Kontrolle von Justiervorgängen an optischen Vorrichtungen |
DE3473649D1 (en) * | 1984-06-18 | 1988-09-29 | Hell Rudolf Dr Ing Gmbh | Method and appliance for the acoustic control of the adjustment of optical devices |
ATE36608T1 (de) * | 1984-06-18 | 1988-09-15 | Hell Rudolf Dr Ing Gmbh | Verfahren und einrichtung zur akustischen kontrolle von justiervorgaengen an optischen vorrichtungen. |
JPS61117737A (ja) * | 1984-11-13 | 1986-06-05 | Pioneer Electronic Corp | フオ−カスサ−ボ装置 |
US4689779A (en) * | 1984-12-19 | 1987-08-25 | Kabushiki Kaisha Toshiba | Tracking control system for optical record disc information reproducing apparatus |
NL8500059A (nl) * | 1985-01-11 | 1986-08-01 | Philips Nv | Inrichting voor het weergeven van informatie van een optisch uitleesbare registratiedrager. |
JPS61177642A (ja) * | 1985-01-31 | 1986-08-09 | Olympus Optical Co Ltd | 光学的情報記録再生装置 |
US4899327A (en) * | 1985-02-04 | 1990-02-06 | International Business Machines Corporation | Focus servo loop correction |
JPS61177647A (ja) * | 1985-02-04 | 1986-08-09 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 情報記憶装置 |
DE3503983A1 (de) * | 1985-02-06 | 1986-08-07 | Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen | Fokus-regelung fuer ein geraet fuer plattenfoermige, rotierende informationstraeger |
JPH0736233B2 (ja) * | 1985-04-16 | 1995-04-19 | オリンパス光学工業株式会社 | 光学的情報記録再生装置 |
JPS61264521A (ja) * | 1985-05-20 | 1986-11-22 | Hitachi Ltd | 光学式読取再生装置 |
US4764860A (en) * | 1985-06-26 | 1988-08-16 | Nippon Gakki Seizo Kabushiki Kaisha | Servo circuit for an information recording and/or reproducing apparatus |
US4701603A (en) * | 1985-10-17 | 1987-10-20 | Optical Disc Corporation | Focus control system for optical information recorder or player |
JPH056575Y2 (US06277897-20010821-C00009.png) * | 1986-04-18 | 1993-02-19 | ||
US4695722A (en) * | 1986-04-25 | 1987-09-22 | Ford Aerospace & Communications Corporation | Optical scanner error compensator |
US4878211A (en) * | 1986-05-26 | 1989-10-31 | Pioneer Electronic Corporation | Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation |
JPS63228421A (ja) * | 1987-03-17 | 1988-09-22 | Minolta Camera Co Ltd | 自動合焦装置 |
JPH0777048B2 (ja) * | 1987-06-26 | 1995-08-16 | 三菱電機株式会社 | 記録媒体駆動装置 |
US4972075A (en) * | 1988-08-02 | 1990-11-20 | Minolta Camera Kabushiki Kaisha | Automatic focusing system with dual diffraction gratings and converging means |
US5062094A (en) * | 1988-11-07 | 1991-10-29 | Minolta Camera Kabushiki Kaisha | Optical head for optical disk system |
US5166916A (en) * | 1988-12-14 | 1992-11-24 | Asahi Kogaku Kogyo Kabushiki Kaisha | Automatic gain control apparatus |
JPH03263620A (ja) * | 1990-03-13 | 1991-11-25 | Pioneer Electron Corp | ディスクプレーヤのサーボ装置 |
JPH0827962B2 (ja) * | 1990-06-27 | 1996-03-21 | パイオニア株式会社 | 光ピックアップ |
US5245174A (en) * | 1990-10-15 | 1993-09-14 | Applied Magnetics Corporation | Focus sensing apparatus utilizing a reflecting surface having variable reflectivity |
GB2248989B (en) * | 1990-10-15 | 1995-05-24 | Applied Magnetics Corp | Focus sensing apparatus and method |
US5347502A (en) * | 1991-11-08 | 1994-09-13 | Matsushita Electric Industrial Co., Ltd. | Focusing control system for use in an information recording and reproducing apparatus |
KR100230228B1 (ko) * | 1993-07-31 | 1999-11-15 | 윤종용 | 광디스크 시스템의 포커싱 제어장치 |
US5436880A (en) * | 1994-01-10 | 1995-07-25 | Eastman Kodak Company | Laser power control in an optical recording system using partial correction of reflected signal error |
JPH08180429A (ja) * | 1994-12-22 | 1996-07-12 | Sharp Corp | 光情報記録再生装置及び光記録媒体 |
JP3553241B2 (ja) * | 1995-11-24 | 2004-08-11 | シャープ株式会社 | 光ディスク装置 |
DE19640870A1 (de) * | 1996-10-04 | 1998-04-09 | Thomson Brandt Gmbh | Aufzeichnungs- oder Wiedergabegerät für optische Informationsträger mit einem Servo-Regelkreis und Verfahren zur Fehlersignalbehandlung in einem solchen |
US5897798A (en) * | 1997-06-04 | 1999-04-27 | Hmt Technology Corporation | Laser texturing apparatus employing a rotating mirror |
JP2005203057A (ja) * | 2004-01-19 | 2005-07-28 | Funai Electric Co Ltd | 光ディスク記録再生装置 |
DE602005004532T2 (de) * | 2004-05-04 | 2009-01-22 | Koninklijke Philips Electronics N.V. | Schienenreibungs-kalibration |
KR100604014B1 (ko) | 2004-06-21 | 2006-07-24 | 엘지전자 주식회사 | 홀로그래픽 데이터 저장 시스템 |
US7869022B2 (en) * | 2007-07-18 | 2011-01-11 | Asml Netherlands B.V. | Inspection method and apparatus lithographic apparatus, lithographic processing cell, device manufacturing method and distance measuring system |
KR101286634B1 (ko) * | 2012-01-13 | 2013-07-22 | 도시바삼성스토리지테크놀러지코리아 주식회사 | 광 검출 소자 및 이를 적용하는 광 픽업 장치 및 광 디스크 드라이브 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7315419A (nl) * | 1973-11-10 | 1975-05-13 | Philips Nv | Inrichting voor het uitlezen van een schijfvor- mige registratiedrager. |
NL7401805A (nl) * | 1974-02-09 | 1975-08-12 | Philips Nv | Inrichting voor het instellen van het beeld en informatiestruktuur op een omzetter. |
NL182257C (nl) * | 1974-12-23 | 1988-02-01 | Philips Nv | Inrichting voor het uitlezen van een vlakke reflekterende registratiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur. |
JPS5538369A (en) * | 1978-09-01 | 1980-03-17 | Texaco Development Corp | Manufacture of carboxylic acids and their esters |
JPS5538639A (en) * | 1978-09-07 | 1980-03-18 | Pioneer Video Corp | Servo drawing-in unit for focus lens of optical information reader |
JPS5694528A (en) * | 1979-12-28 | 1981-07-31 | Matsushita Electric Ind Co Ltd | Drawing-in method of focus servo |
-
1980
- 1980-12-29 JP JP55188178A patent/JPS57113428A/ja active Granted
-
1981
- 1981-12-22 US US06/333,390 patent/US4475182A/en not_active Expired - Lifetime
- 1981-12-24 GB GB8138973A patent/GB2090437B/en not_active Expired
- 1981-12-29 DE DE3151834A patent/DE3151834C2/de not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5938936A (ja) * | 1982-08-28 | 1984-03-03 | Sony Corp | 情報再生装置のサ−ボコントロ−ル回路 |
JPH0526253B2 (US06277897-20010821-C00009.png) * | 1982-08-28 | 1993-04-15 | Sony Corp | |
FR2536196A1 (fr) * | 1982-11-11 | 1984-05-18 | Sony Corp | Circuit de servocommande d'alignement destine a un appareil de reproduction optique |
US4651314A (en) * | 1984-09-14 | 1987-03-17 | Olympus Optical Co., Ltd. | Optical recording and reproducing equipment |
Also Published As
Publication number | Publication date |
---|---|
DE3151834C2 (de) | 1985-03-07 |
GB2090437A (en) | 1982-07-07 |
GB2090437B (en) | 1984-09-26 |
JPS6244330B2 (US06277897-20010821-C00009.png) | 1987-09-19 |
US4475182A (en) | 1984-10-02 |
DE3151834A1 (de) | 1982-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57113428A (en) | Focus servo device | |
EP0372793A3 (en) | Amplifier with modulated resistor gain control | |
JPS5728409A (en) | Muting circuit | |
JPS5753802A (en) | Processor of digital signal | |
JPS52128014A (en) | Color signal transmission circuit | |
JPS5627580A (en) | Signal processor | |
JPS5327011A (en) | Instantaneous c ompressing circuit | |
JPS5327020A (en) | Fuzz effect circuit | |
JPS5296341A (en) | Current controller | |
JPS54114159A (en) | Automatic gain control circuit | |
JPS53121447A (en) | Automatic gain control circuit | |
JPS5287957A (en) | Gain control circuit | |
JPS56109012A (en) | Automatic gain control circuit | |
JPS573409A (en) | Agc circuit | |
JPS5455109A (en) | Controller for signal level | |
JPS53148260A (en) | Gain control circuit | |
JPS5649971A (en) | Amplifying device for neutron flux detector | |
JPS5226144A (en) | Automatic gain control circuit | |
JPS52142131A (en) | Air-to-fuel ratio control system | |
JPS57111110A (en) | Bias stabilizing circuit | |
JPS5368549A (en) | Automatic gain control circuit | |
JPS5314537A (en) | Automatic equalizer | |
JPS5488012A (en) | Tap gain control system | |
JPS5484956A (en) | Automatic gain control circuit | |
JPS57212813A (en) | Automatic sound volume adjuster |