FR2497379A1 - Dispositif de detection de signaux pour appareil de lecture d'informations optiques - Google Patents
Dispositif de detection de signaux pour appareil de lecture d'informations optiques Download PDFInfo
- Publication number
- FR2497379A1 FR2497379A1 FR8124176A FR8124176A FR2497379A1 FR 2497379 A1 FR2497379 A1 FR 2497379A1 FR 8124176 A FR8124176 A FR 8124176A FR 8124176 A FR8124176 A FR 8124176A FR 2497379 A1 FR2497379 A1 FR 2497379A1
- Authority
- FR
- France
- Prior art keywords
- detectors
- light
- track
- signal
- brush
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 210000001747 pupil Anatomy 0.000 description 11
- 230000014509 gene expression Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000870659 Crassula perfoliata var. minor Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003595 spectral effect Effects 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
- G11B7/08—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
- G11B7/095—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
- G11B7/0953—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 to compensate for eccentricity of the disc or disc tracks
-
- 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 Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55188796A JPS57111837A (en) | 1980-12-27 | 1980-12-27 | Signal detecting system of optical information reader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2497379A1 true FR2497379A1 (fr) | 1982-07-02 |
| FR2497379B1 FR2497379B1 (en, 2012) | 1985-01-04 |
Family
ID=16229944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8124176A Granted FR2497379A1 (fr) | 1980-12-27 | 1981-12-23 | Dispositif de detection de signaux pour appareil de lecture d'informations optiques |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4445208A (en, 2012) |
| JP (1) | JPS57111837A (en, 2012) |
| DE (1) | DE3151157A1 (en, 2012) |
| FR (1) | FR2497379A1 (en, 2012) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0111006A4 (en) * | 1982-05-31 | 1985-02-18 | Sony Corp | SIGNAL GENERATOR FOR CONTROLLING AN OPTICAL HEAD. |
| EP0167357A3 (en) * | 1984-06-30 | 1986-11-12 | Sony Corporation | Photosensor devices and optical pick-ups |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870434A (ja) * | 1981-10-22 | 1983-04-26 | Toshiba Corp | 光学ヘツド |
| JPS59125727U (ja) * | 1983-02-15 | 1984-08-24 | パイオニア株式会社 | 光学式情報ピツクアツプ装置 |
| US5416755A (en) * | 1985-02-28 | 1995-05-16 | Canon Kabushiki Kaisha | Optical pickup using split beams impinging on different photo-detector areas |
| US4879706A (en) * | 1987-07-29 | 1989-11-07 | Laser Magnetic Storage International Company | Method and apparatus for focus and tracking in an optical disk system |
| JPH05242512A (ja) * | 1991-12-19 | 1993-09-21 | Matsushita Electric Ind Co Ltd | 光ディスク装置 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2339928A1 (fr) * | 1976-01-28 | 1977-08-26 | Philips Nv | Dispositif pour la lecture d'un porteur d'enregistrement presentant une structure d'information lisible par voie optique |
| DE2805458A1 (de) * | 1977-02-09 | 1978-08-10 | Mitsubishi Electric Corp | Verfahren und vorrichtung zum optischen auslesen der information eines aufzeichnungstraegers |
| DD151097A5 (de) * | 1978-04-14 | 1981-09-30 | Philips Nv | Optoelektronisches fokusfehlerdetektionssystem |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2212070A6 (en, 2012) * | 1972-08-25 | 1974-07-19 | Thomson Csf | |
| FR2266932B1 (en, 2012) * | 1973-03-02 | 1977-09-02 | Thomson Brandt | |
| NL182990C (nl) * | 1975-07-07 | 1988-06-16 | Philips Nv | Inrichting voor het uitlezen van een stralingsreflekterende registratiedrager. |
| JPS5319806A (en) * | 1976-08-09 | 1978-02-23 | Hitachi Ltd | Information reproducer |
| US4349901A (en) * | 1980-06-20 | 1982-09-14 | Eastman Kodak Company | Apparatus and method for reading optical discs |
-
1980
- 1980-12-27 JP JP55188796A patent/JPS57111837A/ja active Granted
-
1981
- 1981-12-23 US US06/333,697 patent/US4445208A/en not_active Expired - Lifetime
- 1981-12-23 FR FR8124176A patent/FR2497379A1/fr active Granted
- 1981-12-23 DE DE19813151157 patent/DE3151157A1/de active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2339928A1 (fr) * | 1976-01-28 | 1977-08-26 | Philips Nv | Dispositif pour la lecture d'un porteur d'enregistrement presentant une structure d'information lisible par voie optique |
| DE2805458A1 (de) * | 1977-02-09 | 1978-08-10 | Mitsubishi Electric Corp | Verfahren und vorrichtung zum optischen auslesen der information eines aufzeichnungstraegers |
| DD151097A5 (de) * | 1978-04-14 | 1981-09-30 | Philips Nv | Optoelektronisches fokusfehlerdetektionssystem |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0111006A4 (en) * | 1982-05-31 | 1985-02-18 | Sony Corp | SIGNAL GENERATOR FOR CONTROLLING AN OPTICAL HEAD. |
| EP0167357A3 (en) * | 1984-06-30 | 1986-11-12 | Sony Corporation | Photosensor devices and optical pick-ups |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3151157A1 (de) | 1982-07-08 |
| JPS57111837A (en) | 1982-07-12 |
| DE3151157C2 (en, 2012) | 1988-06-30 |
| JPS6239493B2 (en, 2012) | 1987-08-24 |
| US4445208A (en) | 1984-04-24 |
| FR2497379B1 (en, 2012) | 1985-01-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |