Noise suppression in spatial carrier phase shifting method

Kemao Qian; Seah Hock Soon; Anand Krishna Asundi

doi:10.1117/1.1592169

1 September 2003 Noise suppression in spatial carrier phase shifting method

Kemao Qian, Seah Hock Soon, Anand Krishna Asundi

Optical Engineering, Vol. 42, Issue 9, (September 2003). https://doi.org/10.1117/1.1592169

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.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Kemao Qian, Seah Hock Soon, and Anand Krishna Asundi "Noise suppression in spatial carrier phase shifting method," Optical Engineering 42(9), (1 September 2003). https://doi.org/10.1117/1.1592169

Published: 1 September 2003

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