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1. (WO2007007248) SCANNING OF MULTI-LAYER OPTICAL RECORD CARRIERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/007248 International Application No.: PCT/IB2006/052283
Publication Date: 18.01.2007 International Filing Date: 06.07.2006
IPC:
G11B 7/09 (2006.01) ,G11B 7/00 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
08
Disposition or mounting of heads or light sources relatively to record carriers
09
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
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
Applicants:
KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL (AllExceptUS)
BRULS, Dominique [NL/NL]; FR (UsOnly)
VAN DER LEE, Alexander [NL/NL]; FR (UsOnly)
VERSCHUREN, Coen [NL/NL]; FR (UsOnly)
Inventors:
BRULS, Dominique; FR
VAN DER LEE, Alexander; FR
VERSCHUREN, Coen; FR
Agent:
CHAFFRAIX, Jean; Société Civile SPID 156 Boulevard Haussmann F-75008 Paris, FR
Priority Data:
05300568.207.07.2005EP
Title (EN) SCANNING OF MULTI-LAYER OPTICAL RECORD CARRIERS
(FR) BALAYAGE DE SUPPORTS SUPPORTS D'ENREGISTREMENT OPTIQUES MULTICOUCHES
Abstract:
(EN) An optical scanning device for scanning a first and a second information layer of an optical record carrier, a scanning method, and an optical record carrier. The device includes at least one radiation source for providing a first radiation beam for scanning the first information layer and a second radiation beam for scanning the second information layer. An objective lens system is arranged to converge the first and second radiation beams on the respective information layers. The device is configured to determine tracking information from only one of said radiation beams, for tracking error compensation.
(FR) L'invention concerne un dispositif de balayage optique pour balayer une première couche d'informations et une seconde couche d'informations d'un support d'enregistrement optique. L'invention concerne également une méthode de balayage et un support d'enregistrement optique. Le dispositif de l'invention comprend au moins une source de rayonnement pour fournir un premier faisceau de rayonnement destiné à balayer la première couche d'informations, et un second faisceau de rayonnement destiné à balayer la seconde couche d'informations. Un système de lentille d'objectif est agencé pour faire converger le premier faisceau de rayonnement et le second faisceau de rayonnement sur les couches d'informations respectives. Le dispositif de l'invention est conçu pour déterminer des informations de traçage seulement à partir d'un faisceau de rayonnement, pour tracer une compensation d'erreur.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020080032150EP1905022JP2009500783US20080212457CN101218640MYPI 20063217
IN587/CHENP/2008