Processing

Please wait...

Settings

Settings

Goto Application

1. WO2007138528 - A DEVICE AND METHOD FOR CONTROLLING THE FOCUS OF A PLURALITY OF SPOTS

Publication Number WO/2007/138528
Publication Date 06.12.2007
International Application No. PCT/IB2007/051943
International Filing Date 23.05.2007
IPC
G11B 7/09 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
08Disposition or mounting of heads or light sources relatively to record carriers
09with 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
G11B 7/14 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
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
14specially adapted to record on, or to reproduce from, more than one track simultaneously
CPC
G11B 7/0908
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;
08Disposition or mounting of heads or light sources relatively to record carriers
09with 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
0908for focusing only
G11B 7/14
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
14specially adapted to record on, or to reproduce from, more than one track simultaneously
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL] (AllExceptUS)
  • GOOSSENS, Henk [NL]/[CN] (UsOnly)
  • CHEN, Dayu [CN]/[CN] (UsOnly)
  • ZHAN, Qiang [CN]/[CN] (UsOnly)
Inventors
  • GOOSSENS, Henk
  • CHEN, Dayu
  • ZHAN, Qiang
Common Representative
  • KONINKLIJKE PHILIPS ELECTRONICS N.V.
Priority Data
200610088603.731.05.2006CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A DEVICE AND METHOD FOR CONTROLLING THE FOCUS OF A PLURALITY OF SPOTS
(FR) DISPOSITIF ET PROCÉDÉ DE CONTRÔLE DE FOCALISATION D'UNE PLURALITÉ DE POINTS
Abstract
(EN)
The present invention relates to a device (300) for controlling, with a focus error signal (FE), the focus of a plurality of spots intended to be applied on an optical disc, said plurality of spots being intended to follow a displacement involving at least one moving spot and at least one spot having a relative stationary movement. The device comprises a generating unit (310) for generating said focus error signal (FE), before said displacement, from a first focus error ( FEA ) signal derived from said at least one moving spot, to a second focus error signal ( FEC ) derived from said at least one spot having a relative stationary movement.
(FR)
La présente invention concerne un dispositif (300) de contrôle, avec un signal d'erreur de focalisation (FE), la focalisation d'une pluralité de points à appliquer sur un disque optique, ladite pluralité de points étant destinés à suivre un déplacement impliquant au moins un point en mouvement et au moins un point ayant un mouvement stationnaire relatif. Le dispositif comporte une unité de génération (310) pour générer ledit signal d'erreur de focalisation (FE), avant ledit déplacement, depuis un premier signal d'erreur (FEA) dérivé dudit au moins un point en mouvement, vers un second signal d'erreur de focalisation (FEC) dérivé dudit un point ayant un mouvement stationnaire relatif.
Also published as
EP2007735993
RU2008147108
Latest bibliographic data on file with the International Bureau