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Optical Engineering

Discussion on spatial resolution and sensitivity of fourier transform fringe detection
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Paper Abstract

The spatial resolution and sensitivity of the Fourier transform method for fringe detection is analyzed. The spatial resolution degradation due to Fourier transform is discussed through a signal processing technique. It is found that the upper limit of spatial resolution for displacement measurement is half the carrier fringe pitch, or half the grid pitch for the grid method. The formulation of sensitivity using signal processing and communication theory is also performed and analyzed. Measures to improve the spatial resolution sensitivity are discussed.

Paper Details

Date Published: 1 October 2000
PDF: 5 pages
Opt. Eng. 39(10) doi: 10.1117/1.1290683
Published in: Optical Engineering Volume 39, Issue 10
Show Author Affiliations
Bing Zhao, Polytechnic Univ. (United States)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)

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