FR2722605B1 - Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement - Google Patents
Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrementInfo
- Publication number
- FR2722605B1 FR2722605B1 FR9408736A FR9408736A FR2722605B1 FR 2722605 B1 FR2722605 B1 FR 2722605B1 FR 9408736 A FR9408736 A FR 9408736A FR 9408736 A FR9408736 A FR 9408736A FR 2722605 B1 FR2722605 B1 FR 2722605B1
- Authority
- FR
- France
- Prior art keywords
- recording
- reading information
- optical method
- recording medium
- medium
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- 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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/128—Modulators
-
- 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 Recording Or Reproduction (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9408736A FR2722605B1 (fr) | 1994-07-13 | 1994-07-13 | Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement |
EP95904592A EP0686298B1 (fr) | 1993-12-23 | 1994-12-22 | Procede et systeme optiques d'inscription/lecture d'information sur un support d'enregistrement |
JP7517241A JPH08509566A (ja) | 1993-12-23 | 1994-12-22 | 記録媒体の上で情報を書き込み/読み出す光システムおよびその方法 |
US08/507,232 US5680386A (en) | 1993-12-23 | 1994-12-22 | Optical method and system for writing/reading information on a recording medium |
DE69424532T DE69424532T2 (de) | 1993-12-23 | 1994-12-22 | Verfahren und optisches system zur aufzeichnung/wiedergabe von information auf einem aufzeichnungsmedium |
PCT/FR1994/001517 WO1995017747A1 (fr) | 1993-12-23 | 1994-12-22 | Procede et systeme optiques d'inscription/lecture d'information sur un support d'enregistrement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9408736A FR2722605B1 (fr) | 1994-07-13 | 1994-07-13 | Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2722605A1 FR2722605A1 (fr) | 1996-01-19 |
FR2722605B1 true FR2722605B1 (fr) | 1996-08-14 |
Family
ID=9465377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9408736A Expired - Fee Related FR2722605B1 (fr) | 1993-12-23 | 1994-07-13 | Procede et systeme optiques d'inscription/lecture d'informations sur un support d'enregistrement |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2722605B1 (fr) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54834A (en) * | 1977-06-03 | 1979-01-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical information processing system |
JPS57152549A (en) * | 1981-03-17 | 1982-09-20 | Fujitsu Ltd | Optical recorder |
FR2521760A1 (fr) * | 1982-02-12 | 1983-08-19 | Thomson Csf | Procede thermo-optique d'inscription d'information sur support et dispositif mettant en oeuvre ce procede |
JPS5922246A (ja) * | 1982-07-28 | 1984-02-04 | Toshiba Corp | 情報記録装置 |
NL8801327A (nl) * | 1988-05-24 | 1989-12-18 | Philips Nv | Methode voor het optisch aftasten van een informatievlak en optische registratiedragers en aftastinrichtingen geschikt voor toepassing van de methode. |
JPH0296937A (ja) * | 1988-10-03 | 1990-04-09 | Nippon Columbia Co Ltd | 光情報記録装置 |
JPH02302932A (ja) * | 1989-05-16 | 1990-12-14 | Fuji Electric Co Ltd | 光記録再生方式 |
US5172369A (en) * | 1990-03-02 | 1992-12-15 | Pioneer Electronic Corporation | Optical pickup, optical information recording carrier and recording and reproducing apparatus thereof |
JPH03273545A (ja) * | 1990-03-23 | 1991-12-04 | Matsushita Electric Ind Co Ltd | 光磁気記録再生装置 |
JPH0668474A (ja) * | 1992-08-19 | 1994-03-11 | Sanyo Electric Co Ltd | 光記録媒体およびその再生装置 |
-
1994
- 1994-07-13 FR FR9408736A patent/FR2722605B1/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2722605A1 (fr) | 1996-01-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |