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1. WO2005101390 - OPTICAL SCANNER WITH SYNCHRONOUS SAMPLING

Publication Number WO/2005/101390
Publication Date 27.10.2005
International Application No. PCT/EP2005/003609
International Filing Date 06.04.2005
IPC
G11B 7/005 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
005Reproducing
G11B 7/125 2012.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical 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
CPC
G11B 7/005
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording 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
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
005Reproducing
G11B 7/125
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording 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
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical 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
Applicants
  • THOMSON LICENSING [FR]/[FR] (AllExceptUS)
  • BRÄUER, Dietmar [DE]/[DE] (UsOnly)
Inventors
  • BRÄUER, Dietmar
Agents
  • THIES, Stephan
Priority Data
10 2004 019 046.116.04.2004DE
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL SCANNER WITH SYNCHRONOUS SAMPLING
(FR) SCANNER OPTIQUE AVEC ECHANTILLONNAGE SYNCHRONE
Abstract
(EN)
The present invention relates to a scanner for optical storage media (5) with an improved signal?to?noise ratio. In the case of an optical scanner according to the invention having a light source (1) for generating a light beam for reading out data stored on an optical storage medium (5), the light source (1) being modulated by a radio?frequency modulator (13), and having an analog?to?digital converter (9), which converts an analog data signal generated by a photodetector (7) into a digital data signal (RF), the radio?frequency modulator (13) and the analog?to?digital converter (9) are synchronized.
(FR)
La présente invention concerne un scanner pour des supports de stockage optique (5) avec rapport signal sur bruit amélioré . Dans le cas d'un scanner optique tel celui de l'invention dont la source lumineuse (1) génère un faisceau de lumière lisant des données stockées sur un support de stockage optique (5), la source lumineuse (1) étant modulée par un modulateur RF (13) et possédant un numériseur (9) qui convertit un signal de données analogiques généré par un photodétecteur (7) en un signal de données numériques (RF), le modulateur RF (13) et le numériseur (9) sont synchronisés.
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