EP 1756512 A2 20070228 - SPECKLE SIZING AND SENSOR DIMENSIONS IN OPTICAL POSITIONING DEVICE
Title (en)
SPECKLE SIZING AND SENSOR DIMENSIONS IN OPTICAL POSITIONING DEVICE
Title (de)
SPECKLE-BEMESSUNG UND SENSORDIMENSIONEN IN EINER OPTISCHEN POSITIONSBESTIMMUNGSEINRICHTUNG
Title (fr)
CALIBRAGE DE TAVELURES ET DIMENSIONS DE CAPTEUR DANS UN DISPOSITIF DE POSITIONNEMENT OPTIQUE
Publication
Application
Priority
- US 2005017982 W 20050519
- US 57306204 P 20040521
- US 12898805 A 20050513
Abstract (en)
[origin: WO2005114097A2] One embodiment relates to an optical displacement sensor for sensing transverse displacement of a data input device relative to a surface by determining displacement of optical features in a succession of frames. The sensor includes at least a coherent light source (306), illumination optics (308) to illuminate a portion of the surface (304), imaging optics (310), and a first array (302) of photosensitive elements having a periodic distance. The illuminator and the detector are configured to produce on the first array (302) of photosensitive elements an intensity pattern of light reflected from the illuminated portion of the surface. The intensity pattern comprises a plurality of speckles having an average speckle diameter which is between one half and two times the periodic distance of the array (302).
IPC 8 full level
G01B 11/02 (2006.01); G01B 11/00 (2006.01); G01D 5/347 (2006.01); G01P 3/36 (2006.01); G01P 3/80 (2006.01); G06F 3/03 (2006.01)
CPC (source: EP KR)
G01B 11/002 (2013.01 - EP KR); G01D 5/34715 (2013.01 - EP KR); G01P 3/36 (2013.01 - EP KR); G01P 3/806 (2013.01 - EP KR); G06F 3/0317 (2013.01 - EP KR)
Citation (search report)
See references of WO 2005114097A2
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 2005114097 A2 20051201; WO 2005114097 A3 20060406; EP 1756512 A2 20070228; JP 2008500557 A 20080110; KR 100877005 B1 20090109; KR 20070020084 A 20070216; TW 200607985 A 20060301; TW I263032 B 20061001
DOCDB simple family (application)
US 2005017982 W 20050519; EP 05753720 A 20050519; JP 2007527528 A 20050519; KR 20067027002 A 20061221; TW 94116525 A 20050520