Abstract
The spatial carrier phase shifting method (SCPSM) has advantages over both the Fourier transform and phase shifting methods. Unlike the phase shifting method, only a single fringe pattern is needed, and unlike the Fourier transform method, SCPSM is not computationally intensive. However, these advantages are at the cost of increased susceptibility to noise. In this work, a novel bandpass filter is developed and applied for noise suppression in SCPSM. As an angular carrier frequency of π/2 is widely used, the bandpass filter can be simply designed from a known low-pass filter. The developed filter is applied to a simulated fringe pattern to show its benefits.
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