DE3688905D1 - Geraet mit optischem kopf. - Google Patents
Geraet mit optischem kopf.Info
- Publication number
- DE3688905D1 DE3688905D1 DE8686115664T DE3688905T DE3688905D1 DE 3688905 D1 DE3688905 D1 DE 3688905D1 DE 8686115664 T DE8686115664 T DE 8686115664T DE 3688905 T DE3688905 T DE 3688905T DE 3688905 D1 DE3688905 D1 DE 3688905D1
- 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
- G11B7/08—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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60260358A JPH07105055B2 (ja) | 1985-11-20 | 1985-11-20 | 光学ヘツド装置 |
JP60260356A JPS62137734A (ja) | 1985-11-20 | 1985-11-20 | 光学ヘツド装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3688905D1 true DE3688905D1 (de) | 1993-09-23 |
DE3688905T2 DE3688905T2 (de) | 1994-03-10 |
Family
ID=26544570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE86115664T Expired - Fee Related DE3688905T2 (de) | 1985-11-20 | 1986-11-11 | Gerät mit optischem Kopf. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4835761A (de) |
EP (1) | EP0223191B1 (de) |
KR (1) | KR900006956B1 (de) |
DE (1) | DE3688905T2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1324516C (en) * | 1988-06-23 | 1993-11-23 | Toshiya Nagahama | Optical pickup apparatus |
JPH0263067A (ja) * | 1988-08-30 | 1990-03-02 | Konica Corp | 画像作成装置の安全装置 |
US5606541A (en) * | 1992-11-13 | 1997-02-25 | International Business Machines Corporation | Switchable filter for modulating laser intensity and reducing laser feedback in an optical disk device |
US5473594A (en) * | 1993-02-26 | 1995-12-05 | Kabushiki Kaisha Kenwood | Optical pickup device using optical lens coated with antireflection film whose spectral reflectance changes in accordance with wavelength |
US5894465A (en) * | 1997-01-07 | 1999-04-13 | Rrad-Rite Corporation | Transmissive data storage media and an optical head using holographic or acousto-optical deflection |
DE10330945A1 (de) * | 2003-07-08 | 2005-02-03 | Deutsche Thomson-Brandt Gmbh | Optischer Abtaster mit Mikrooptik zur Strahlkombination |
JP2005140831A (ja) * | 2003-11-04 | 2005-06-02 | Fujitsu Ltd | 波長特性可変フィルタ |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7506495A (nl) * | 1975-06-02 | 1976-12-06 | Philips Nv | Inrichting voor het uitlezen van een registratie- drager. |
JPS56137118A (en) * | 1980-03-29 | 1981-10-26 | Rikagaku Kenkyusho | Production of lamellar diffraction grating |
NL8104946A (nl) * | 1981-11-02 | 1983-06-01 | Philips Nv | Inrichting voor het uitlezen en/of inschrijven van een optisch uitleesbare informatiestructuur op een registratiedrager. |
JPS5958637A (ja) * | 1982-09-28 | 1984-04-04 | Sony Corp | 光学式再生装置 |
JPS5971142A (ja) * | 1982-10-14 | 1984-04-21 | Mitsubishi Electric Corp | 光学的情報再生装置 |
NL8303932A (nl) * | 1982-11-17 | 1984-06-18 | Pioneer Electronic Corp | Opneeminrichting voor optische plaat. |
JPS60257584A (ja) * | 1984-06-04 | 1985-12-19 | Sharp Corp | 光検出器内蔵型半導体レ−ザ |
JPS611078A (ja) * | 1984-06-13 | 1986-01-07 | Matsushita Electric Ind Co Ltd | 半導体レ−ザ装置 |
JP2575099B2 (ja) * | 1984-10-04 | 1997-01-22 | ソニー株式会社 | 光学式ヘツドのトラツキング誤差検出装置 |
-
1986
- 1986-11-07 US US06/928,816 patent/US4835761A/en not_active Expired - Lifetime
- 1986-11-11 DE DE86115664T patent/DE3688905T2/de not_active Expired - Fee Related
- 1986-11-11 EP EP86115664A patent/EP0223191B1/de not_active Expired - Lifetime
- 1986-11-13 KR KR1019860009581A patent/KR900006956B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0223191B1 (de) | 1993-08-18 |
KR870005351A (ko) | 1987-06-08 |
EP0223191A3 (en) | 1989-06-14 |
DE3688905T2 (de) | 1994-03-10 |
EP0223191A2 (de) | 1987-05-27 |
KR900006956B1 (ko) | 1990-09-25 |
US4835761A (en) | 1989-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |