TY - JOUR
N2 - The present work offers new equations for phase evaluation in measurements. Several phase-shifting equations with an arbitrary but constant phase-shift between captured intensity signs are proposed. The equations are similarly derived as the so called Carré equation. The idea is to develop a generalization of the Carré equation that is not restricted to four images. Errors and random noise in the images cannot be eliminated, but the uncertainty due to their effects can be reduced by increasing the number of observations. An experimental analysis of the errors of the technique was made, as well as a detailed analysis of errors of the measurement. The advantages of the proposed equation are its precision in the measures taken, speed of processing and the immunity to noise in signs and images.
L1 - http://rhis.czasopisma.pan.pl/Content/107053/PDF/Journal10178-VolumeXVII%20Issue2_04%20paper.pdf
L2 - http://rhis.czasopisma.pan.pl/Content/107053
PY - 2010
IS - No 2
DO - 10.2478/v10178-010-0016-6
KW - metrology
KW - Moiré techniques
KW - fringe analysis
KW - phase measurement
KW - phase shifting technique
KW - Carré equation
A1 - Magalhaes, Pedro
A1 - Neto, Perrin
A1 - Magalhães, Cristina
PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
DA - 2010
T1 - New Carré Equation
UR - http://rhis.czasopisma.pan.pl/dlibra/publication/edition/107053
T2 - Metrology and Measurement Systems
ER -