System Parameter Estimation for a Laser-Speckle Strain Gauge

In this paper a specific arrangement for an interferometric laser-speckle gauge is suggested. The geometrical parameter of the set-up are determined by a grid search over the viable set to minimize the impact of deviations of the geometrical parameter. Furthermore, we suggest a linear unbiased minimum variance estimator for measuring an applied measurand vector to the observed specimen. Measurement results using this estimator are shown for a particular measurement set-up of the laser-speckle gauge.