After a brief description of the experimental set-up used for the stra
in analysis of composite laminates with graphite fibres and thermoplas
tic matrix, the results obtained using a software code suitable for re
ading and analysing fringe patterns are presented. In particular the p
rogram uses two different approaches: the first semi-automatic with al
gorithms proper of fringe tracking and the second based on Fourier tra
nsform.