Multiwavelength Wavefront Detection Based on a Lateral Shear Interferometer and Polarization Phase Shifting Techniques

We present a multiwavelength analysis of a wavefront detected by a color camera and a lateral shear interferometer. The system employs polarization phase shifting techniques by rotating a linear polarizer at the output and detect the phase information through a frequency demodulation algorithm. By considering the phase modulation obtained by rotating the analyzer, a frequency filter centered on the desired peak, carries the phase and amplitude information of the detected wavefront. Theoretical approach, considering Jones Matrices of each element, and experimental results shows the feasibility of the implementation.