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OE Letters

Windowed Fourier transform method for demodulation of carrier fringes

[+] Author Affiliations
Kemao Qian

Nanyang Technological University, School of Computer Engineering, Singapore, 639798 E-mail: mkmqian@ntu.edu.sg

Opt. Eng. 43(7), 1472-1473 (Jul 01, 2004). doi:10.1117/1.1759333
History: Received Nov. 17, 2003; Revised Mar. 9, 2004; Accepted Mar. 16, 2004; Online June 28, 2004
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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. © 2004 Society of Photo-Optical Instrumentation Engineers.

© 2004 Society of Photo-Optical Instrumentation Engineers

Citation

Kemao Qian
"Windowed Fourier transform method for demodulation of carrier fringes", Opt. Eng. 43(7), 1472-1473 (Jul 01, 2004). ; http://dx.doi.org/10.1117/1.1759333


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