NL8004159A - Optische opneeminrichting. - Google Patents
Optische opneeminrichting. Download PDFInfo
- Publication number
- NL8004159A NL8004159A NL8004159A NL8004159A NL8004159A NL 8004159 A NL8004159 A NL 8004159A NL 8004159 A NL8004159 A NL 8004159A NL 8004159 A NL8004159 A NL 8004159A NL 8004159 A NL8004159 A NL 8004159A
- Authority
- NL
- Netherlands
- Prior art keywords
- semiconductor laser
- laser
- frequency
- oscillation
- longitudinal
- 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
- 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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Semiconductor Lasers (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9937479A JPS5535689A (en) | 1978-09-06 | 1979-08-03 | Shoes producing apparatus |
| JP9937479 | 1979-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8004159A true NL8004159A (nl) | 1981-01-22 |
Family
ID=14245751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8004159A NL8004159A (nl) | 1979-08-03 | 1980-07-18 | Optische opneeminrichting. |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4480325A (de) |
| DE (1) | DE3027318C2 (de) |
| NL (1) | NL8004159A (de) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3376172D1 (en) * | 1982-01-22 | 1988-05-05 | Hitachi Ltd | Method and apparatus for reducing semiconductor laser optical noise |
| JPS5971142A (ja) * | 1982-10-14 | 1984-04-21 | Mitsubishi Electric Corp | 光学的情報再生装置 |
| JPS59171037A (ja) * | 1983-03-18 | 1984-09-27 | Hitachi Ltd | 半導体レーザの駆動方法及び駆動装置 |
| JPS6035344A (ja) * | 1983-08-08 | 1985-02-23 | Hitachi Tobu Semiconductor Ltd | 発光装置およびこれを用いた光学的信号処理装置 |
| US4815058A (en) * | 1985-10-21 | 1989-03-21 | Hitachi, Ltd. | Optical information processing apparatus |
| US4819242A (en) * | 1985-11-20 | 1989-04-04 | Hitachi, Ltd. | Semiconductor laser driver circuit |
| JPS62150732U (de) * | 1986-03-17 | 1987-09-24 | ||
| US4799069A (en) * | 1986-04-18 | 1989-01-17 | Minolta Camera Kabushiki Kaisha | Laser recording apparatus |
| US5127015A (en) * | 1990-04-17 | 1992-06-30 | Sharp Kabushiki Kaisha | Driving circuit of a semiconductor laser |
| US5065401A (en) * | 1991-02-26 | 1991-11-12 | Spectra Diode Laboratories, Inc. | Pulse jitter reduction method for a laser diode or array |
| FR2676302B1 (fr) * | 1991-05-07 | 1993-07-16 | Thomson Csf | Procede de lecture des informations contenues dans un disque optique. |
| JPH0589465A (ja) * | 1991-06-28 | 1993-04-09 | Hitachi Ltd | 光学式情報記録再生方法およびその装置 |
| US5386124A (en) * | 1992-04-10 | 1995-01-31 | Fuji Photo Film Co., Ltd. | Image scanning apparatus |
| JP3045357B2 (ja) * | 1992-07-28 | 2000-05-29 | 富士写真フイルム株式会社 | 光走査記録装置 |
| US5309461A (en) * | 1992-07-29 | 1994-05-03 | International Business Machines Corporation | Compensated laser drive circuit |
| US5386409A (en) * | 1992-08-05 | 1995-01-31 | Kabushiki Kaisha Toshiba | Optical information reproducing apparatus having improved laser oscillation |
| JP3567472B2 (ja) * | 1993-09-29 | 2004-09-22 | ソニー株式会社 | 光磁気記録装置 |
| CA2168491A1 (en) * | 1995-02-01 | 1996-08-02 | Alexei Bogdan | Data reading device using semiconductor laser |
| JPH0973637A (ja) * | 1995-09-06 | 1997-03-18 | Hitachi Ltd | 光ディスク信号処理装置 |
| TW494403B (en) * | 1998-12-24 | 2002-07-11 | Koninkl Philips Electronics Nv | Device having a first operational state for writing information onto a record carrier |
| US6829052B2 (en) * | 2000-12-25 | 2004-12-07 | Fuji Photo Film Co., Ltd. | Sensor detecting attenuated total reflection angle by using semiconductor laser unit driven with driving current on which high frequency component is superimposed |
| US20080212455A1 (en) * | 2004-05-25 | 2008-09-04 | Koninklijke Philips Electronics, N.V. | Method of Enhancing Laser Operating Efficiency |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7312139A (de) * | 1972-09-08 | 1974-03-12 | ||
| FR2222665B1 (de) * | 1973-03-21 | 1975-10-31 | Thomson Brandt | |
| US3812477A (en) * | 1973-04-09 | 1974-05-21 | Ibm | Method for superresolution in an optical memory |
| JPS5760693B2 (de) * | 1974-02-12 | 1982-12-21 | Sony Corp | |
| NL7608561A (nl) * | 1976-08-02 | 1978-02-06 | Philips Nv | Optische uitleeseenheid voor het aftasten van een registratiedrager voorzien van een stra- lingsreflekterende informatiestruktuur. |
| US4081670A (en) * | 1976-11-08 | 1978-03-28 | Bell Telephone Laboratories, Incorporated | Automatic bias control circuit for injection lasers |
| JPS5532238A (en) * | 1978-08-25 | 1980-03-06 | Matsushita Electric Ind Co Ltd | Optical recorder and reproducing method |
-
1980
- 1980-07-18 DE DE3027318A patent/DE3027318C2/de not_active Expired
- 1980-07-18 NL NL8004159A patent/NL8004159A/nl not_active Application Discontinuation
-
1983
- 1983-03-04 US US06/472,220 patent/US4480325A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4480325A (en) | 1984-10-30 |
| DE3027318A1 (de) | 1981-01-22 |
| DE3027318C2 (de) | 1983-05-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A1A | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| A85 | Still pending on 85-01-01 | ||
| BC | A request for examination has been filed | ||
| BV | The patent application has lapsed |