FR2575315B1 - Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement - Google Patents
Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrementInfo
- Publication number
- FR2575315B1 FR2575315B1 FR858516052A FR8516052A FR2575315B1 FR 2575315 B1 FR2575315 B1 FR 2575315B1 FR 858516052 A FR858516052 A FR 858516052A FR 8516052 A FR8516052 A FR 8516052A FR 2575315 B1 FR2575315 B1 FR 2575315B1
- Authority
- FR
- France
- Prior art keywords
- recording
- servo
- laser apparatus
- track
- recording track
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or 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
- G11B7/08—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
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
- Semiconductor Lasers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/684,352 US4623784A (en) | 1984-12-20 | 1984-12-20 | Laser recording apparatus with off-center lens and error detection |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2575315A1 FR2575315A1 (fr) | 1986-06-27 |
FR2575315B1 true FR2575315B1 (fr) | 1990-11-02 |
Family
ID=24747697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR858516052A Expired - Fee Related FR2575315B1 (fr) | 1984-12-20 | 1985-10-29 | Appareil a laser, notamment pour enregistrement, et procede d'asservissement a une piste d'enregistrement |
Country Status (5)
Country | Link |
---|---|
US (1) | US4623784A (fr) |
JP (1) | JPS61150391A (fr) |
DE (1) | DE3536103A1 (fr) |
FR (1) | FR2575315B1 (fr) |
GB (1) | GB2169123A (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62125567A (ja) * | 1985-11-26 | 1987-06-06 | Csk Corp | 光記録媒体の角度変位修正方法 |
US5113061A (en) * | 1987-02-13 | 1992-05-12 | Olympus Optical Co., Ltd. | Optical card having an identifier for identifying track construction and apparatus for writing and/or reading data on and/or from the optical card |
JP2766348B2 (ja) * | 1989-11-02 | 1998-06-18 | オリンパス光学工業株式会社 | 光学ヘッド |
DE69423671T2 (de) * | 1993-04-23 | 2000-08-17 | Canon K.K., Tokio/Tokyo | Optisches Informationsaufzeichnungs- und/oder Wiedergabegerät |
US20060059365A1 (en) * | 1999-12-06 | 2006-03-16 | Bsi2000, Inc. | Facility security with optical cards |
WO2003084015A1 (fr) * | 2002-03-28 | 2003-10-09 | Fujitsu Limited | Dispositif a reseau de lasers et procede de commande de reseau de lasers |
US20050197945A1 (en) * | 2004-02-12 | 2005-09-08 | Bsi2000, Inc. | Optical banking card |
US20050237338A1 (en) * | 2004-04-26 | 2005-10-27 | Bsi2000, Inc. | Embedded holograms on optical cards |
US20050247776A1 (en) * | 2004-05-04 | 2005-11-10 | Bsi2000, Inc. | Authenticating optical-card reader |
US20060039249A1 (en) * | 2004-08-18 | 2006-02-23 | Bsi2000,Inc. | Systems and methods for reading optical-card data |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB353696A (en) * | 1930-07-25 | 1931-07-30 | Gen Electric Co Ltd | Improvements in the reproduction of sound from sound film records |
JPS4989507A (fr) * | 1972-12-26 | 1974-08-27 | ||
NL7401858A (nl) * | 1974-02-12 | 1975-08-14 | Philips Nv | Registratiedrager waarop informatie is aange- t in een optisch uitleesbare struktuur. |
CA1091966A (fr) * | 1976-10-15 | 1980-12-23 | Chiaki Kojima | Appareil de lecture de signaux enregistres sur support |
JPS5369006A (en) * | 1976-11-30 | 1978-06-20 | Sony Corp | Reproducer of disc form signal recording media |
FR2460523A1 (fr) * | 1979-06-29 | 1981-01-23 | Thomson Csf | Tete de lecture optique a source laser a semi-conducteur et dispositif de lecture par reflexion d'un support d'information comportant une telle tete optique |
JPS6048810B2 (ja) * | 1980-02-18 | 1985-10-29 | 横河電機株式会社 | 光学的デ−タ読取り/書き込み装置 |
JPS59188851A (ja) * | 1983-04-11 | 1984-10-26 | Olympus Optical Co Ltd | 光学的情報読み取り装置 |
-
1984
- 1984-12-20 US US06/684,352 patent/US4623784A/en not_active Expired - Fee Related
-
1985
- 1985-10-01 GB GB08524168A patent/GB2169123A/en not_active Withdrawn
- 1985-10-09 DE DE19853536103 patent/DE3536103A1/de not_active Withdrawn
- 1985-10-29 FR FR858516052A patent/FR2575315B1/fr not_active Expired - Fee Related
- 1985-11-14 JP JP60256491A patent/JPS61150391A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2169123A (en) | 1986-07-02 |
JPS61150391A (ja) | 1986-07-09 |
DE3536103A1 (de) | 1986-06-26 |
FR2575315A1 (fr) | 1986-06-27 |
GB8524168D0 (en) | 1985-11-06 |
US4623784A (en) | 1986-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |