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.
JO - Metrology and Measurement Systems
L1 - http://so.czasopisma.pan.pl/Content/107053/PDF/Journal10178-VolumeXVII+Issue2_04+paper.pdf
L2 - http://so.czasopisma.pan.pl/Content/107053
IS - No 2
KW - metrology
KW - Moiré techniques
KW - fringe analysis
KW - phase measurement
KW - phase shifting technique
KW - Carré equation
ER -
A1 - Magalhaes, Pedro
A1 - Neto, Perrin
A1 - Magalhães, Cristina
PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation
JF - Metrology and Measurement Systems
T1 - New Carré Equation
UR - http://so.czasopisma.pan.pl/dlibra/docmetadata?id=107053
DOI - 10.2478/v10178-010-0016-6