Research on the sensitivity of projection moiré system considering its variety in space

In this paper, we studied the sensitivity of the projection moiré system considering its variety not only in the X and Y directions but also along the Z direction in space. A more accurate nonlinear system model is proposed to precisely describe the phase-to-height conversion relationship for an arbitrarily arranged projection moiré system. Based on the nonlinear system model, a general calibration method is proposed to determine the three full-field sensitivity matrices. The correctness, effectiveness, and superiority of the proposed model are proven by both the calibration experiment and experiments with real objects.