Comparison of phase retrieval techniques based on the transport of intensity equation using equally and unequally spaced plane separation criteria

Phase retrieval techniques based on the Transport of Intensity Equation (TIE) use a sequence of through-focus intensity images in order to recover the phase information. Classically, the capturing of these images have been made using equally spaced plane separations. Recently, it has been shown that the phase retrieval techniques based on TIE can be carried out using unequally plane separations. In this work we compare quantitatively the phase reconstruction of various TIE solvers using the equal and unequal plane separation strategy.