Phase-shifting technique is an effect way to suppress the zero order diffraction and the conjugate term in
digital holography. However the phase-shifting error will influence inevitably the evaluation precision in practice
operation. In this paper, the deformation evaluation errors by means of two kinds of four-step phase-shifting
algorithms, which are in common use in digital holography, are analyzed and compared by computer simulation.
In addition, the phase-shifting errors may cumulate or not according to different phase-shifting techniques, and
both cases are considered in this paper. The results based on the digital in-line holography show that the two
four-step phase-shifting algorithms possess different sensitivity to the phase-shifting errors, and the preferable one,
which is more immune to the phase-shifting errors, is educed in conclusion.
The elimination of zero-order diffraction of 10.6 μm infrared digital holography