EP 2006850 A9 20090225 - OPTICAL PICKUP AND INFORMATION DEVICE
Title (en)
OPTICAL PICKUP AND INFORMATION DEVICE
Title (de)
OPTISCHE AUFNAHMEVORRICHTUNG UND INFORMATIONSEINRICHTUNG
Title (fr)
LECTEUR OPTIQUE ET DISPOSITIF D'INFORMATIONS
Publication
Application
Priority
- JP 2007056927 W 20070329
- JP 2006095904 A 20060330
Abstract (en)
[origin: EP2006850A2] An optical pickup (100) includes: (i) a light source (101) for emitting a laser beam; (ii) diffraction means (101) for diffracting the emitted laser beam into 0-th degree light and diffracted light; (iii) an optical system (105, etc.) for introducing the diffracted 0-th degree light and the diffracted light into one of recording layers; (iv) an optical element (111, etc.) for changing the polarization direction of a part of signal light generated in one recording layer and the polarization direction of a part of stray light generated in the other recording layer; and (v) light receiving means (PD1a, etc.) for receiving at least the signal light.
IPC 8 full level
G11B 7/135 (2006.01)
CPC (source: EP US)
G11B 7/1353 (2013.01 - EP US); G11B 7/1367 (2013.01 - EP US); G11B 7/1381 (2013.01 - EP US); G11B 7/0903 (2013.01 - EP US); G11B 7/0909 (2013.01 - EP US); G11B 2007/0013 (2013.01 - EP US)
Citation (search report)
See references of WO 2007114280A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 2006850 A2 20081224; EP 2006850 A4 20090506; EP 2006850 A9 20090225; JP 4726254 B2 20110720; JP WO2007114280 A1 20090820; US 2009274031 A1 20091105; US 8072868 B2 20111206; WO 2007114280 A1 20071011
DOCDB simple family (application)
EP 07740365 A 20070329; JP 2007056927 W 20070329; JP 2008508625 A 20070329; US 29507707 A 20070329