CAE-based compensation methods of non-uniform pulse laser beam profiles

Applying the pulse laser to speckle methods, non-uniformities of the laser beam profiles and the intensities between each laser pulse have unpleasant consequences on the intensity distribution of the recorded images and follo wing on the assigned fringes of the corresponding subtractive result. This contribution introduces a computer-based technique for compensating this te chnical and physical problem, so that the fringe quality is improved, even if the homogeneity of the laser beam profiles is on such low level, that th e conventional (subtractive) technique fails. The solution is based on algo rithms, which refines each intensity distribution and is comparable with th e known shading correction. (C) 2000 Elsevier Science Ltd. All rights reser ved.