EP 2168210 A1 20100331 - METHOD AND APPARATUS FOR NEAR-FIELD IMAGING
Title (en)
METHOD AND APPARATUS FOR NEAR-FIELD IMAGING
Title (de)
VERFAHREN UND VORRICHTUNG FÜR NAHFELDABBILDUNG
Title (fr)
PROCÉDÉ ET APPAREIL D'IMAGERIE EN CHAMP PROCHE
Publication
Application
Priority
- FI 2008000071 W 20080616
- FI 20070474 A 20070614
Abstract (en)
[origin: WO2008152190A1] The invention deals with the problem of identifying small particles or small irregularities in a material. In general, the resolution characteristics of an imaging device could be significantly improved if the device could sense or capture the evanescent part of the spectrum of the incoming wave. It is known that the amplitude of an evanescent wave is attenuated exponentially as a function of the distance from the source. The main principle of operation of the proposed device is to identify and sense these evanescent waves, enhance their amplitude, measure the enhanced field with the invented device in a certain frequency bandwidth and by using a postprocessing algorithm, reconstruct the near-field image of the object. In order to simplify the device and the measurement procedure, a method has been developed that uses only a small number of stationary probes. From the measured results, the original field distribution of the imaged object can be obtained by using a post-processing alorithm.
IPC 8 full level
H01Q 15/02 (2006.01); G01N 22/00 (2006.01); G01R 29/08 (2006.01); G01V 3/12 (2006.01)
CPC (source: EP FI)
G01N 22/00 (2013.01 - FI); G01R 29/0892 (2013.01 - FI); G01V 3/12 (2013.01 - EP); H01Q 15/0026 (2013.01 - EP); H01Q 15/0086 (2013.01 - EP); H01Q 15/02 (2013.01 - EP FI); H01Q 15/10 (2013.01 - FI); H01Q 21/064 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2008152190 A1 20081218; EP 2168210 A1 20100331; EP 2168210 A4 20130925; FI 20070474 A0 20070614; FI 20070474 L 20081215
DOCDB simple family (application)
FI 2008000071 W 20080616; EP 08775449 A 20080616; FI 20070474 A 20070614