Discussion on spatial resolution and sensitivity of fourier transform fringe detection

Bing Zhao; Anand Krishna Asundi

doi:10.1117/1.1290683

1 October 2000 Discussion on spatial resolution and sensitivity of fourier transform fringe detection

Bing Zhao, Anand Krishna Asundi

Optical Engineering, Vol. 39, Issue 10, (October 2000). https://doi.org/10.1117/1.1290683

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.

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Bing Zhao and Anand Krishna Asundi "Discussion on spatial resolution and sensitivity of fourier transform fringe detection," Optical Engineering 39(10), (1 October 2000). https://doi.org/10.1117/1.1290683

Published: 1 October 2000

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