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Optical Engineering

Windowed Fourier transform method for demodulation of carrier fringes
Author(s): Qian Kemao
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Paper Abstract

The Fourier transform method for demodulation of carrier fringes has been extensively developed and widely used in optical metrology. However, the Fourier transform being a global operation, it has poor ability to localize the signal properties and hence the result of FTM is not ideal. A windowed Fourier transform method is thus proposed, with advantages of signal localization and noise filtering. An example demonstrates the improved result compared to the traditional Fourier transform.

Paper Details

Date Published: 1 July 2004
PDF: 2 pages
Opt. Eng. 43(7) doi: 10.1117/1.1759333
Published in: Optical Engineering Volume 43, Issue 7
Show Author Affiliations
Qian Kemao, Nanyang Technological Univ. (Singapore)


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