DE3510519C2 - - Google Patents
Info
- Publication number
- DE3510519C2 DE3510519C2 DE3510519A DE3510519A DE3510519C2 DE 3510519 C2 DE3510519 C2 DE 3510519C2 DE 3510519 A DE3510519 A DE 3510519A DE 3510519 A DE3510519 A DE 3510519A DE 3510519 C2 DE3510519 C2 DE 3510519C2
- Authority
- DE
- Germany
- Prior art keywords
- light
- photodetector
- objective lens
- optical system
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 claims description 82
- 230000005540 biological transmission Effects 0.000 claims 7
- 238000003384 imaging method Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 10
- 238000012544 monitoring process Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 210000001624 hip Anatomy 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 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
- G11B7/135—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
-
- 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
- G11B7/0916—Foucault or knife-edge methods
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
- Automatic Focus Adjustment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59053524A JPS60197950A (ja) | 1984-03-22 | 1984-03-22 | 光学ヘツド |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3510519A1 DE3510519A1 (de) | 1985-09-26 |
| DE3510519C2 true DE3510519C2 (en, 2012) | 1990-12-13 |
Family
ID=12945204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853510519 Granted DE3510519A1 (de) | 1984-03-22 | 1985-03-22 | Optisches system zum spur-abtasten eines informations-aufzeichnungstraegers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4694443A (en, 2012) |
| JP (1) | JPS60197950A (en, 2012) |
| DE (1) | DE3510519A1 (en, 2012) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US5060212A (en) * | 1987-08-17 | 1991-10-22 | Ricoh Company, Ltd. | Integrated optical pick-up device |
| US5105410A (en) * | 1987-12-28 | 1992-04-14 | Ricoh Company, Ltd. | Multi-beam optical pick-up |
| JP2692901B2 (ja) * | 1988-10-31 | 1997-12-17 | 株式会社東芝 | 情報処理装置 |
| US5105407A (en) * | 1989-01-11 | 1992-04-14 | Kabushiki Kaisha Toshiba | Optical information-processing apparatus |
| US5251011A (en) * | 1989-06-28 | 1993-10-05 | Dainippon Screen Manufacturing Co., Ltd. | Displacement detection system |
| US5281797A (en) * | 1991-12-26 | 1994-01-25 | Hitachi, Ltd. | Short wavelength optical disk head having a changeable aperture |
| JP3402997B2 (ja) * | 1997-03-12 | 2003-05-06 | 株式会社リコー | 光ピックアップ装置 |
| JP2001023190A (ja) * | 1999-07-07 | 2001-01-26 | Sony Corp | 露光装置、露光方法、光ディスク装置、及び記録及び／又は再生方法 |
| US8023368B2 (en) * | 2003-10-16 | 2011-09-20 | Panasonic Corporation | Tilt sensor and optical disk drive |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR205243A1 (es) * | 1972-05-11 | 1976-04-21 | Philips Nv | Aparato para la lectura de un portador de grabacion reflector plano |
| FR2235448B1 (en, 2012) * | 1973-06-29 | 1976-05-07 | Thomson Brandt | |
| FR2325953A1 (fr) * | 1975-09-29 | 1977-04-22 | Thomson Brandt | Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur |
| JPS5266405A (en) * | 1975-11-29 | 1977-06-01 | Victor Co Of Japan Ltd | Optical recording system of information recording discs |
| NL7706753A (nl) * | 1977-03-23 | 1978-12-22 | Philips Nv | Inrichting voor het uitlezen van een optische stralingsreflekterende informatiedrager. |
| JPS54146613A (en) * | 1978-05-10 | 1979-11-16 | Hitachi Ltd | Optical head |
| US4349901A (en) * | 1980-06-20 | 1982-09-14 | Eastman Kodak Company | Apparatus and method for reading optical discs |
| JPS5752006A (en) * | 1980-08-19 | 1982-03-27 | Olympus Optical Co Ltd | Method and device for detecting focus |
| JPS57108811A (en) * | 1980-12-26 | 1982-07-07 | Hitachi Ltd | Optical focus position detector |
| US4466087A (en) * | 1981-01-08 | 1984-08-14 | Xerox Corporation | Optical memory system for a reading/writing, verifying and tracking module |
| DE3280232D1 (de) * | 1981-06-22 | 1990-09-27 | Toshiba Kawasaki Kk | Optischer kopf. |
| EP0070552B1 (en) * | 1981-07-20 | 1990-06-27 | Kabushiki Kaisha Toshiba | Optical head |
| JPS5819744A (ja) * | 1981-07-24 | 1983-02-04 | Sony Corp | 光学式記録再生装置 |
| EP0075192B1 (en) * | 1981-09-17 | 1990-03-14 | Kabushiki Kaisha Toshiba | An optical head |
| JPS5856236A (ja) * | 1981-09-28 | 1983-04-02 | Hitachi Ltd | 光学的トラック位置検出装置およびそれを用いた光学的記録再生装置 |
| JPS5968844A (ja) * | 1982-10-14 | 1984-04-18 | Matsushita Electric Ind Co Ltd | 光学的可逆記録再生装置 |
-
1984
- 1984-03-22 JP JP59053524A patent/JPS60197950A/ja active Pending
-
1985
- 1985-03-19 US US06/713,598 patent/US4694443A/en not_active Expired - Lifetime
- 1985-03-22 DE DE19853510519 patent/DE3510519A1/de active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3510519A1 (de) | 1985-09-26 |
| JPS60197950A (ja) | 1985-10-07 |
| US4694443A (en) | 1987-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2652790C2 (de) | Optisches Lesegerät | |
| DE69131770T2 (de) | Gerät für optische Platten | |
| DE2625359C3 (en, 2012) | ||
| DE3140349C2 (en, 2012) | ||
| DE3686589T2 (de) | Spurfolgesystem zum steuerbaren projizieren eines optischen strahles auf eine optische platte. | |
| DE2734257C2 (de) | Vorrichtung zum berührungslosen optischen Auslesen von Information von einem Aufzeichnungsträger | |
| DE68916342T2 (de) | Optische Abtastvorrichtung. | |
| DE69023585T2 (de) | Optischer Kopf. | |
| DE69526435T2 (de) | Optische abtastvorrichtung | |
| DE3132818C2 (de) | Vorrichtung zum Steuern des Fokussierzustandes eines Objektivs in bezug auf eine Videoplatte | |
| DE3687392T2 (de) | Optischer kopf. | |
| DE3507139C2 (en, 2012) | ||
| DE69012945T2 (de) | Optische aufzeichnungs- und/oder -wiedergabegerät. | |
| DE3047822A1 (de) | Vorrichtung zum auslesen optischer information | |
| DE3023779C2 (de) | Verfahren und Vorrichtung zum Erzeugen eines Fokussierfehlersignales für ein Objektiv | |
| DE3510519C2 (en, 2012) | ||
| DE69128662T2 (de) | Optischer Wiedergabekopf | |
| DE3733422A1 (de) | Optischer aufnehmer | |
| DE3409177C2 (en, 2012) | ||
| DE68921301T2 (de) | Optische Abtastvorrichtungen. | |
| DE2722935C2 (de) | Vorrichtung zur optischen Abtastung von auf der Oberfläche eines Trägers gespeicherter Information | |
| DE2923323C2 (de) | Informationsverarbeitungseinrichtung mit einem zwei lasernde Punkte aufweisenden Halbleiterlaser | |
| DE60030921T2 (de) | Optische Abtastvorrichtung | |
| DE69421225T2 (de) | Optische Abtastvorrichtung für magnetooptischen Aufzeichnungsträger | |
| EP0147620B1 (en) | Optical head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |