Interference fringes measurement based on Hough transform

Fuzhong Bai; Changhui Rao

doi:10.1117/12.819698

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31 December 2008 Interference fringes measurement based on Hough transform

Fuzhong Bai, Changhui Rao

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Proceedings Volume 7130, Fourth International Symposium on Precision Mechanical Measurements; 71303V (2008) https://doi.org/10.1117/12.819698
Event: Fourth International Symposium on Precision Mechanical Measurements, 2008, Anhui, China

Abstract

The paper firstly discusses the derivation of interference fringes and FFT method that is a conventional method for measuring fringes with equal spacing. And then, a new method for measuring the interference line fringes is presented. On the basis of Hough transform and digital image processing technology, this method accomplishes fringes image preprocessing (i.e., fringes skeletonizing) and fringes spacing measurement. It has been shown, with both theoretical analysis and experimental measurements, that this method is a universal method for fringes measurement and has more remarkable advantage than the FFT method because of the application of the former not being limited by some regulations such as equidistant fringes and sampling length, and so on. In addition, it also holds a good noise rejection capability and great reliability.

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Fuzhong Bai and Changhui Rao "Interference fringes measurement based on Hough transform", Proc. SPIE 7130, Fourth International Symposium on Precision Mechanical Measurements, 71303V (31 December 2008); https://doi.org/10.1117/12.819698

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