DE3850312D1 - Fokussierungsservoschaltung in einem optischen Plattenspieler. - Google Patents
Fokussierungsservoschaltung in einem optischen Plattenspieler.Info
- Publication number
- DE3850312D1 DE3850312D1 DE3850312T DE3850312T DE3850312D1 DE 3850312 D1 DE3850312 D1 DE 3850312D1 DE 3850312 T DE3850312 T DE 3850312T DE 3850312 T DE3850312 T DE 3850312T DE 3850312 D1 DE3850312 D1 DE 3850312D1
- Authority
- DE
- Germany
- Prior art keywords
- servo circuit
- focusing servo
- optical turntable
- turntable
- optical
- 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 - Fee Related
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
- G11B7/12—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
- G11B7/1353—Diffractive elements, e.g. holograms or gratings
-
- 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
-
- 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
- G11B7/08—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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors 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
- G11B7/12—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
- G11B7/1372—Lenses
- G11B7/1378—Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
-
- 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
-
- 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
- G11B7/0901—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 track following only
- G11B7/0903—Multi-beam tracking systems
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/079,653 US4879706A (en) | 1987-07-29 | 1987-07-29 | Method and apparatus for focus and tracking in an optical disk system |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3850312D1 true DE3850312D1 (de) | 1994-07-28 |
DE3850312T2 DE3850312T2 (de) | 1995-01-26 |
Family
ID=22151935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3850312T Expired - Fee Related DE3850312T2 (de) | 1987-07-29 | 1988-07-18 | Fokussierungsservoschaltung in einem optischen Plattenspieler. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4879706A (de) |
EP (1) | EP0301643B1 (de) |
JP (1) | JPH01125731A (de) |
DE (1) | DE3850312T2 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5315574A (en) * | 1988-10-28 | 1994-05-24 | Matsushita Electric Industrial Co., Ltd. | Optical head with polarized beam hologram |
EP0588385B1 (de) * | 1989-02-13 | 1997-10-15 | Omron Corporation | Datenaufzeichnungs-/Wiedergabevorrichtung für optische Karte |
JP2657413B2 (ja) * | 1989-03-03 | 1997-09-24 | パイオニア株式会社 | 光ヘッド |
US5050153A (en) * | 1989-06-06 | 1991-09-17 | Wai-Hon Lee | Semiconductor laser optical head assembly |
US5563868A (en) * | 1990-06-18 | 1996-10-08 | Matsushita-Kotobuki Electronics Industries, Ltd. | Optical servo system for magnetic disk |
US5420848A (en) * | 1990-08-02 | 1995-05-30 | Canon Kabushiki Kaisha | Optical system for optical information recording/reproducing apparatus having a galvano mirror |
JP3430048B2 (ja) | 1998-12-24 | 2003-07-28 | 日本電気株式会社 | 光学的情報記録再生装置 |
JP2005534133A (ja) * | 2002-07-25 | 2005-11-10 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光学走査装置 |
DE602004013975D1 (de) * | 2003-06-26 | 2008-07-03 | Koninkl Philips Electronics Nv | Optisches plattenlaufwerk |
US7280232B2 (en) * | 2004-09-21 | 2007-10-09 | Chapman Instruments, Inc. | Method and apparatus for measuring wafer thickness |
CN112368594B (zh) * | 2018-08-29 | 2024-06-21 | 松下知识产权经营株式会社 | 距离测定装置 |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3701602A (en) * | 1971-04-30 | 1972-10-31 | Grumman Aerospace Corp | Multi-axis optical alignment system including a spatial filter |
NL7302941A (de) * | 1973-03-02 | 1974-09-04 | ||
DE2418195A1 (de) * | 1974-04-13 | 1975-11-06 | Bosch Gmbh Robert | Verfahren zur fuehrung eines lichtstrahls auf einer signalspur |
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. |
JPS6011374B2 (ja) * | 1975-02-05 | 1985-03-25 | 株式会社日立製作所 | 情報再生方法及びその装置 |
NL182990C (nl) * | 1975-07-07 | 1988-06-16 | Philips Nv | Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager. |
GB1532345A (en) * | 1976-06-25 | 1978-11-15 | Hitachi Ltd | Information play-back apparatus |
NL7703077A (nl) * | 1977-03-22 | 1978-09-26 | Philips Nv | Inrichting voor het uitlezen van een stralings- reflekterende registratiedrager. |
JPS5465007A (en) * | 1977-11-02 | 1979-05-25 | Matsushita Electric Ind Co Ltd | Disc form recording carrier reader |
US4241423A (en) * | 1978-12-22 | 1980-12-23 | Rca Corporation | Optical memory with injection laser as light source and detector |
JPS5647933A (en) * | 1979-09-25 | 1981-04-30 | Sony Corp | Optical signal head |
NL7907216A (nl) * | 1979-09-28 | 1981-03-31 | Philips Nv | Optisch fokusfout-detektiestelsel. |
US4437177A (en) * | 1979-11-12 | 1984-03-13 | Nippon Telegraph & Telephone Public Corporation | Small-sized video or audio pickup device having a beam deflector disposed within a focusing device support |
JPS5690434A (en) * | 1979-12-19 | 1981-07-22 | Hitachi Ltd | Optical information reproducing device |
JPS57111837A (en) * | 1980-12-27 | 1982-07-12 | Olympus Optical Co Ltd | Signal detecting system of optical information reader |
JPS57120240A (en) * | 1981-01-16 | 1982-07-27 | Sony Corp | Optical disk player |
JPS57181433A (en) * | 1981-04-22 | 1982-11-08 | Olympus Optical Co Ltd | Tracking system for optical disc reproducer |
JPS57176544A (en) * | 1981-04-23 | 1982-10-29 | Olympus Optical Co Ltd | Still reproducing system for optical video disc reproducer |
JPS57195634U (de) * | 1981-06-05 | 1982-12-11 | ||
JPS587230A (ja) * | 1981-07-06 | 1983-01-17 | アロカ株式会社 | 内視用超音波探触子 |
DE3280137D1 (de) * | 1981-09-17 | 1990-04-19 | Toshiba Kawasaki Kk | Ein optischer kopf. |
US4417330A (en) * | 1981-10-15 | 1983-11-22 | Burroughs Corporation | Optical memory system providing improved focusing control |
US4443870A (en) * | 1981-10-15 | 1984-04-17 | Burroughs Corporation | Optical memory system providing track following |
JPS5873023A (ja) * | 1981-10-27 | 1983-05-02 | Pioneer Electronic Corp | 情報読取装置におけるトラツキングサ−ボ信号発生装置 |
NL8105579A (nl) * | 1981-12-11 | 1983-07-01 | Philips Nv | Optisch fokusfoutdetektiestelsel. |
US4446546A (en) * | 1981-12-31 | 1984-05-01 | Magnetic Peripherals Inc. | Focus initialization system for optical recording |
US4435797A (en) * | 1982-02-17 | 1984-03-06 | Burroughs Corporation | Optical memory system having track following and seeking capabilities |
JPS58220248A (ja) * | 1982-06-15 | 1983-12-21 | Nippon Kogaku Kk <Nikon> | 光学式ピツクアツプ |
JPS5922245A (ja) * | 1982-07-28 | 1984-02-04 | Mitsubishi Electric Corp | 光ピツプアツプ |
JPS59110045A (ja) * | 1982-12-13 | 1984-06-25 | Sanyo Electric Co Ltd | 光学式ピツクアツプ装置 |
NL8400674A (nl) * | 1984-03-02 | 1985-10-01 | Philips Nv | Inrichting voor het inschrijven en/of uitlezen van informatie in een spoor van een reflekterende registratiedrager, met een fokusregeling met verminderde spot offsetgevoeligheid. |
JPS6299922A (ja) * | 1985-10-28 | 1987-05-09 | Nec Home Electronics Ltd | 光磁気記録再生装置 |
JPS6432430A (en) * | 1987-07-28 | 1989-02-02 | Sony Corp | Optical recording and reproducing device |
-
1987
- 1987-07-29 US US07/079,653 patent/US4879706A/en not_active Expired - Fee Related
-
1988
- 1988-07-18 DE DE3850312T patent/DE3850312T2/de not_active Expired - Fee Related
- 1988-07-18 EP EP88201545A patent/EP0301643B1/de not_active Expired - Lifetime
- 1988-07-27 JP JP63185714A patent/JPH01125731A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE3850312T2 (de) | 1995-01-26 |
JPH01125731A (ja) | 1989-05-18 |
EP0301643B1 (de) | 1994-06-22 |
EP0301643A2 (de) | 1989-02-01 |
EP0301643A3 (en) | 1990-05-23 |
US4879706A (en) | 1989-11-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB2090437B (en) | Focus servo device in an optical pickup system | |
DE3578474D1 (de) | Optischer plattenspieler. | |
DE69028737D1 (de) | Optisches Informationsaufzeichnungsverfahren | |
DE3852416D1 (de) | Anamorphotische Linse. | |
AU2741777A (en) | Optical read unit with track following focusing arrangement | |
DE3851383D1 (de) | Automatische Fokussierungsschaltung für automatische Fokusanpassung in Abhängigkeit von Videosignalen. | |
DE69224374D1 (de) | Optischer Plattenspieler mit digitalem Servo-Kreis | |
DE69017385D1 (de) | Drehtisch. | |
DE69119314D1 (de) | Optischer Plattenspieler | |
DE3482725D1 (de) | Einstellung der optischen fokussierung bei einem optischen speicherverfahren. | |
DE3482011D1 (de) | Optische plattenspieler. | |
DE3850312D1 (de) | Fokussierungsservoschaltung in einem optischen Plattenspieler. | |
EP0289309A3 (en) | An apparatus for reading an optical disk | |
DE68921140D1 (de) | Optischer Plattenspieler. | |
DE69022921D1 (de) | Sektorservoschablone für optische Platte. | |
DE3884748D1 (de) | Optische Plattenspieler. | |
DE3854258D1 (de) | Optisches Aufzeichnungswiedergabegerät. | |
DE68905896D1 (de) | Laseranordnung in einem optischen verbindungssystem. | |
DE68918732D1 (de) | Signalwiedergabekreis und Signalwiedergabemethode für einen optischen Plattenspieler. | |
IT1137923B (it) | Dispositivo ottico di focalizzazione | |
DE69030345D1 (de) | Automatisches Fokussierungsverfahren | |
DE69009205D1 (de) | Videoplattenspieler. | |
DE3484723D1 (de) | Automatisches fokussierungsverfahren. | |
AT376510B (de) | Optische kopfvorrichtung, insbesondere fuer einen optischen plattenspieler | |
DE69014910D1 (de) | Servoschaltungsanordnung. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8327 | Change in the person/name/address of the patent owner |
Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL |
|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |