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Optical Engineering

Noise suppression in spatial carrier phase shifting method
Author(s): Kemao Qian; Seah Hock Soon; Anand Krishna Asundi
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Paper 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.

Paper Details

Date Published: 1 September 2003
PDF: 4 pages
Opt. Eng. 42(9) doi: 10.1117/1.1592169
Published in: Optical Engineering Volume 42, Issue 9
Show Author Affiliations
Kemao Qian, Nanyang Technological Univ. (Singapore)
Seah Hock Soon, Nanyang Technological Univ. (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)

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