DE3887762D1 - Optischer Kopf. - Google Patents
Optischer Kopf.Info
- Publication number
- DE3887762D1 DE3887762D1 DE88104200T DE3887762T DE3887762D1 DE 3887762 D1 DE3887762 D1 DE 3887762D1 DE 88104200 T DE88104200 T DE 88104200T DE 3887762 T DE3887762 T DE 3887762T DE 3887762 D1 DE3887762 D1 DE 3887762D1
- Authority
- DE
- Germany
- Prior art keywords
- optical head
- optical
- head
- 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
- G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
-
- 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
- G11B7/0909—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
- G11B7/12—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
- G11B7/12—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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62061562A JPS63228428A (ja) | 1987-03-17 | 1987-03-17 | 光学ヘツド |
JP62115019A JPS63279439A (ja) | 1987-05-12 | 1987-05-12 | 光学ヘッド |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3887762D1 true DE3887762D1 (de) | 1994-03-24 |
DE3887762T2 DE3887762T2 (de) | 1994-09-08 |
Family
ID=26402611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3887762T Expired - Fee Related DE3887762T2 (de) | 1987-03-17 | 1988-03-16 | Optischer Kopf. |
Country Status (3)
Country | Link |
---|---|
US (1) | US4870632A (de) |
EP (1) | EP0283002B1 (de) |
DE (1) | DE3887762T2 (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0334601B1 (de) * | 1988-03-25 | 1994-09-07 | Tosoh Corporation | Fehlerdetektorvorrichtung für einen optischen Abtastkopf |
JP2730756B2 (ja) * | 1988-04-13 | 1998-03-25 | 日立建機株式会社 | 超音波探触子及びその製造方法 |
JPH0478029A (ja) * | 1990-07-13 | 1992-03-12 | Toshiba Corp | 光学的情報記録再生装置 |
US5138495A (en) * | 1990-07-27 | 1992-08-11 | Matsushita Electric Industrial Co., Ltd. | Diffractive optical lens |
JP2617237B2 (ja) * | 1990-08-28 | 1997-06-04 | シャープ株式会社 | 光スポット位置検出装置 |
US5281802A (en) * | 1991-02-20 | 1994-01-25 | Ricoh Company, Ltd. | Focus error signal detection device with separating prism |
US5446710A (en) * | 1992-11-06 | 1995-08-29 | International Business Machines Corporation | Focus error detection using an equal path length lateral shearing interferometer |
KR100200828B1 (ko) * | 1994-07-30 | 1999-06-15 | 윤종용 | 포커스에러 검출장치 |
DE69532691T2 (de) * | 1994-12-28 | 2005-02-10 | Seiko Epson Corp. | Polarisations-Beleuchtungsvorrichtung und diese verwendender Projektor |
EP0749119A3 (de) * | 1995-05-31 | 1997-08-20 | Daewoo Electronics Co Ltd | Optisches Abtastgerät |
EP0745983A3 (de) * | 1995-05-31 | 1998-03-04 | Daewoo Electronics Co., Ltd | Optischer Aufnahmekopf |
KR970050336A (ko) * | 1995-12-28 | 1997-07-29 | 구자홍 | 광픽업장치 |
KR19980029872A (ko) * | 1996-10-28 | 1998-07-25 | 배순훈 | 광 픽-업장치 |
KR19980058055A (ko) * | 1996-12-30 | 1998-09-25 | 배순훈 | 광 픽업 장치 |
US6167016A (en) * | 1997-04-11 | 2000-12-26 | Aerial Imaging Corporation | Optical head with a diffractive lens for focusing a laser beam |
JPH11273119A (ja) * | 1998-03-24 | 1999-10-08 | Pioneer Electron Corp | 光学式ピックアップ装置 |
JP2000321021A (ja) * | 1999-05-10 | 2000-11-24 | Canon Inc | 干渉装置、変位測定装置、及びそれを用いた情報記録又は/及び再生装置 |
US6243126B1 (en) * | 2000-03-09 | 2001-06-05 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus in which a laser beam is applied from a semiconductor laser to scan an image carrier, and method of controlling the apparatus |
DE10125469B4 (de) | 2001-05-25 | 2008-01-10 | Leica Microsystems Cms Gmbh | Vorrichtung zur Ermittlung einer Lichtleistung, Mikroskop und Verfahren zur Mikroskopie |
KR100480630B1 (ko) * | 2002-11-13 | 2005-03-31 | 삼성전자주식회사 | 노이즈를 줄일 수 있도록 된 광픽업 및 편광변환기 |
DE102005004419A1 (de) | 2005-01-31 | 2006-08-03 | Sick Ag | Optoelektronischer Sensor |
JP4655025B2 (ja) | 2006-09-07 | 2011-03-23 | パナソニック株式会社 | 光ピックアップ装置 |
JP4853424B2 (ja) * | 2007-08-07 | 2012-01-11 | パナソニック株式会社 | 光ピックアップ装置 |
US11888014B2 (en) * | 2018-01-12 | 2024-01-30 | Zedel Sàrl | Short-wave infrared detector and its integration with CMOS compatible substrates |
US11579014B1 (en) * | 2020-08-20 | 2023-02-14 | Amazon Technologies, Inc. | Optical detector system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8104588A (nl) * | 1981-10-08 | 1983-05-02 | Philips Nv | Bundelscheidingsprisma, werkwijze voor het vervaardigen van dit prisma en van dit prisma voorziene optische lees- en/of schrijfeenheid. |
US4441175A (en) * | 1982-01-25 | 1984-04-03 | Magnetic Peripherals Inc. | Partial beam focus sensing in an optical recording system |
NL8303932A (nl) * | 1982-11-17 | 1984-06-18 | Pioneer Electronic Corp | Opneeminrichting voor optische plaat. |
EP0137272B1 (de) * | 1983-09-05 | 1991-06-19 | Mitsubishi Denki Kabushiki Kaisha | Automatisches Fokussierungsverfahren |
JPS60187941A (ja) * | 1984-03-08 | 1985-09-25 | Seiko Instr & Electronics Ltd | 光情報検出装置 |
JPS61289544A (ja) * | 1985-06-14 | 1986-12-19 | Canon Inc | 光ヘツド装置 |
JPS621141A (ja) * | 1985-06-27 | 1987-01-07 | Matsushita Electric Ind Co Ltd | 光学ヘツド |
JP2508478B2 (ja) * | 1987-02-06 | 1996-06-19 | ソニー株式会社 | 光学ヘツド |
-
1988
- 1988-03-16 DE DE3887762T patent/DE3887762T2/de not_active Expired - Fee Related
- 1988-03-16 EP EP88104200A patent/EP0283002B1/de not_active Expired - Lifetime
- 1988-03-17 US US07/169,478 patent/US4870632A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0283002A2 (de) | 1988-09-21 |
EP0283002B1 (de) | 1994-02-16 |
EP0283002A3 (de) | 1991-03-27 |
US4870632A (en) | 1989-09-26 |
DE3887762T2 (de) | 1994-09-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |