KR850007140A - 정보수록 및 판독장치 - Google Patents
정보수록 및 판독장치Info
- Publication number
- KR850007140A KR850007140A KR1019850001263A KR850001263A KR850007140A KR 850007140 A KR850007140 A KR 850007140A KR 1019850001263 A KR1019850001263 A KR 1019850001263A KR 850001263 A KR850001263 A KR 850001263A KR 850007140 A KR850007140 A KR 850007140A
- Authority
- KR
- South Korea
- Prior art keywords
- control signal
- detectors
- focusing
- information recording
- reading device
- Prior art date
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
-
- 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
- G11B7/094—Methods and circuits for servo offset compensation
-
- 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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL84-00674 | 1984-03-02 | ||
NL8400674A NL8400674A (nl) | 1984-03-02 | 1984-03-02 | Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid. |
Publications (2)
Publication Number | Publication Date |
---|---|
KR850007140A true KR850007140A (ko) | 1985-10-30 |
KR910007908B1 KR910007908B1 (ko) | 1991-10-04 |
Family
ID=19843587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019850001263A KR910007908B1 (ko) | 1984-03-02 | 1985-02-28 | 정보수록 및 판독장치 |
Country Status (11)
Country | Link |
---|---|
US (1) | US4661944A (ko) |
EP (1) | EP0156418B1 (ko) |
JP (1) | JPS60205837A (ko) |
KR (1) | KR910007908B1 (ko) |
AT (1) | ATE43451T1 (ko) |
AU (1) | AU568426B2 (ko) |
CA (1) | CA1232966A (ko) |
DE (1) | DE3570545D1 (ko) |
HK (1) | HK86291A (ko) |
NL (1) | NL8400674A (ko) |
SG (1) | SG85690G (ko) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4899327A (en) * | 1985-02-04 | 1990-02-06 | International Business Machines Corporation | Focus servo loop correction |
US4823330A (en) * | 1985-02-04 | 1989-04-18 | International Business Machines Corporation | Focus servo loop off-set compensation |
USRE34769E (en) * | 1986-01-16 | 1994-11-01 | Mitsubishi Denki Kabushiki Kaisha | Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit |
US5004901A (en) * | 1987-06-04 | 1991-04-02 | Mitsubishi Denki Kabushiki Kaisha | Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit |
EP0241942B1 (en) * | 1986-04-18 | 1992-03-04 | Mitsubishi Denki Kabushiki Kaisha | Optical type head device |
JPS6310326A (ja) * | 1986-07-01 | 1988-01-16 | Sanyo Electric Co Ltd | 光ピツクアツプ装置 |
US4879706A (en) * | 1987-07-29 | 1989-11-07 | Laser Magnetic Storage International Company | Method and apparatus for focus and tracking in an optical disk system |
JPH01137433A (ja) * | 1987-11-13 | 1989-05-30 | Internatl Business Mach Corp <Ibm> | 範囲指示方法 |
US5305294A (en) * | 1988-04-04 | 1994-04-19 | Mitsubishi Denki Kabushiki Kaisha | Magneto-optical recording/reproducing system having an electromagnetic actuator |
EP0336687B1 (en) * | 1988-04-06 | 1995-02-15 | Mitsubishi Denki Kabushiki Kaisha | Recording and reproducing optical disk device |
NL9000282A (nl) * | 1990-02-06 | 1991-09-02 | Philips Nv | Optische aftastinrichting met meerdere aftastvlekken. |
US5241523A (en) * | 1991-12-05 | 1993-08-31 | Eastman Kodak Company | Polarization-based auto-focus apparatus |
DE4226777A1 (de) * | 1992-08-13 | 1994-02-17 | Thomson Brandt Gmbh | Rauschanteilverringerung im Datensignal und optische Abtastvorrichtung |
EP0777218B1 (en) * | 1995-12-06 | 2001-05-16 | Discovision Associates | Apparatus and method for focus control |
US5956304A (en) * | 1997-08-15 | 1999-09-21 | Cirrus Logic, Inc. | Differential phase error detector using dual arm correlation for servo tracking in an optical disk storage device |
US7616536B2 (en) * | 2003-05-21 | 2009-11-10 | Koninklijke Philips Electronics N.V. | Apparatus for radial tracking in an optical disc drive using tracking an error signal derived from wobble-induced signal components and/or data-induced signal components of a detector output |
US20090028021A1 (en) * | 2004-06-01 | 2009-01-29 | Koninklijke Philips Electronics, N.V. | Radial To Focus Cross Talk Cancellation In Optical Storage Systems |
CN1977321A (zh) * | 2004-06-29 | 2007-06-06 | 皇家飞利浦电子股份有限公司 | 用于产生球面像差信号误差的方法以及系统 |
US8213286B2 (en) * | 2007-07-30 | 2012-07-03 | Sanyo Electric Co., Ltd. | Photodetector and optical pickup apparatus including the same |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7402169A (nl) * | 1974-02-15 | 1975-08-19 | Philips Nv | Inrichting voor het uitlezen van een registra- tiedrager waarop informatie is aangebracht in een optisch uitleesbare struktuur. |
GB1532345A (en) * | 1976-06-25 | 1978-11-15 | Hitachi Ltd | Information play-back apparatus |
NL7708200A (nl) * | 1976-07-28 | 1978-01-31 | Hitachi Ltd | Automatische scherpstellingsinrichting. |
NL7703077A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
NL7703076A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
JPS5821334B2 (ja) * | 1978-12-25 | 1983-04-28 | 株式会社東芝 | 自動焦点調節装置 |
JPS5774837A (en) * | 1980-10-25 | 1982-05-11 | Olympus Optical Co Ltd | Signal detection system of optical information reproducing device |
JPS5877036A (ja) * | 1981-10-30 | 1983-05-10 | Olympus Optical Co Ltd | ピット中心検出方法 |
JPS58125241A (ja) * | 1982-01-20 | 1983-07-26 | Matsushita Electric Ind Co Ltd | 光学記録再生装置 |
NL8200208A (nl) * | 1982-01-21 | 1983-08-16 | Philips Nv | Inrichting voor het uitlezen van een schijfvormige registratiedrager. |
-
1984
- 1984-03-02 NL NL8400674A patent/NL8400674A/nl not_active Application Discontinuation
- 1984-06-11 US US06/619,430 patent/US4661944A/en not_active Expired - Lifetime
-
1985
- 1985-02-28 AT AT85200293T patent/ATE43451T1/de not_active IP Right Cessation
- 1985-02-28 JP JP60040237A patent/JPS60205837A/ja active Granted
- 1985-02-28 KR KR1019850001263A patent/KR910007908B1/ko not_active IP Right Cessation
- 1985-02-28 CA CA000475383A patent/CA1232966A/en not_active Expired
- 1985-02-28 DE DE8585200293T patent/DE3570545D1/de not_active Expired
- 1985-02-28 EP EP85200293A patent/EP0156418B1/en not_active Expired
- 1985-03-01 AU AU39405/85A patent/AU568426B2/en not_active Ceased
-
1990
- 1990-10-24 SG SG856/90A patent/SG85690G/en unknown
-
1991
- 1991-10-31 HK HK862/91A patent/HK86291A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU3940585A (en) | 1985-09-05 |
US4661944A (en) | 1987-04-28 |
JPH0514968B2 (ko) | 1993-02-26 |
EP0156418B1 (en) | 1989-05-24 |
EP0156418A1 (en) | 1985-10-02 |
NL8400674A (nl) | 1985-10-01 |
HK86291A (en) | 1991-11-08 |
SG85690G (en) | 1991-01-04 |
ATE43451T1 (de) | 1989-06-15 |
DE3570545D1 (en) | 1989-06-29 |
JPS60205837A (ja) | 1985-10-17 |
CA1232966A (en) | 1988-02-16 |
KR910007908B1 (ko) | 1991-10-04 |
AU568426B2 (en) | 1987-12-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20031017 Year of fee payment: 13 |
|
LAPS | Lapse due to unpaid annual fee |