D. Serrano-García, N. Toto-Arellano, A. Martínez García, J. Ra, as Álvarez., A. Téllez-Quiñones, and G. Rodríguez-Zurita, Simultaneous phase-shifting cyclic interferometer for generation of lateral and radial shear, Rev. Mex. Fís. 57, (2011).