EP 1459307 A2 20040922 - OPTICAL SCANNING DEVICE
Title (en)
OPTICAL SCANNING DEVICE
Title (de)
OPTISCHE ABTASTVORRICHTUNG
Title (fr)
DISPOSITIF DE BALAYAGE OPTIQUE
Publication
Application
Priority
- EP 02804330 A 20021205
- EP 01204786 A 20011207
- IB 0205238 W 20021205
Abstract (en)
[origin: WO03049095A2] An optical scanning device for scanning a dual-layer optical record carrier. The device comprises a spherical aberration compensation optical subsystem including a switchable liquid crystal cell (10) for altering an optical path lengths generated in a non-periodic phase structure (NPS) element (14) formed of birefringent material.
IPC 1-7
IPC 8 full level
G02B 5/30 (2006.01); G02F 1/13 (2006.01); G11B 7/12 (2006.01); G11B 7/125 (2006.01); G11B 7/135 (2006.01)
CPC (source: EP KR)
G02F 1/13 (2013.01 - KR); G11B 7/1367 (2013.01 - EP); G11B 7/1369 (2013.01 - EP KR); G11B 7/13922 (2013.01 - EP); G11B 7/13925 (2013.01 - EP); G11B 2007/0013 (2013.01 - EP)
Citation (search report)
See references of WO 03049095A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03049095 A2 20030612; WO 03049095 A3 20031106; AU 2002365733 A1 20030617; AU 2002365733 A8 20030617; EP 1459307 A2 20040922; JP 2005512255 A 20050428; KR 20040071703 A 20040812
DOCDB simple family (application)
IB 0205238 W 20021205; AU 2002365733 A 20021205; EP 02804330 A 20021205; JP 2003550209 A 20021205; KR 20047008627 A 20021205