EP 1595135 A1 20051116 - METHOD OF PERFORMING OPTICAL MEASUREMENT ON A SAMPLE
Title (en)
METHOD OF PERFORMING OPTICAL MEASUREMENT ON A SAMPLE
Title (de)
VERFAHREN ZUR DURCHFÜHRUNG EINER OPTISCHEN MESSUNG AN EINER PROBE
Title (fr)
PROCEDE PERMETTANT D'EFFECTEUR UNE MESURE OPTIQUE SUR UN ECHANTILLON
Publication
Application
Priority
- NZ 2004000010 W 20040129
- NZ 52393703 A 20030203
- NZ 52751603 A 20030812
Abstract (en)
[origin: WO2004070365A1] The invention relates to a method of performing an optical measurement on a sample, such as an ellipticity measurement. The sample is irradiated with a polarized irradiation beam and a return beam is linearly polarized. The irradiation or return beam is modulated with a birefringence modulator, such as a photoelastic modulator, in accordance with a primary modulation signal. The return beam is directed onto a multichannel detector. Typically the detector is a slow detector, such as a CCD, having a response time greater than a period of the primary modulation signal. Detection values are generated simultaneously at each detection element and processed to determine a plurality of measurements. Various measurement techniques are described, including detector signal averaging over gated intervals; a design employing coherent modulation of the gain of an ICCD, and a modulator-coherent flash lamp design.
IPC 1-7
IPC 8 full level
G01N 21/21 (2006.01)
CPC (source: EP)
G01N 21/211 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004070365 A1 20040819; EP 1595135 A1 20051116; EP 1595135 A4 20070411; JP 2006516731 A 20060706; JP 4555900 B2 20101006
DOCDB simple family (application)
NZ 2004000010 W 20040129; EP 04706394 A 20040129; JP 2006502763 A 20040129