Accuracy and high-speed technique for autoprocessing of Young's fringes

Wenyi Chen; Yushan Tan

doi:10.1117/12.49538

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1 December 1991 Accuracy and high-speed technique for autoprocessing of Young's fringes

Wenyi Chen; Yushan Tan

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Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.49538
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

In this paper, an accuracy and high speed method for auto-processing of young’s fringes is proposed. A group of 1-D sampled intensity values along three or more different directions are taken from young’s fringes, and the fringe spacings of every direction are obtained by 1-D FFT respectively. Two directions which have smaller fringe spacing are selected from all directions. The accurate fringe spacings along these two directions are obtained by using orthogonal coherent phase detection technique (OCPD). The actual spacing and angle of young’s fringes, therefore, can be calculated. In this paper the principle of OCPD is introduced in detail. The accuracy of the method is evaluated theoretically and experimentally.

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Wenyi Chen and Yushan Tan "Accuracy and high-speed technique for autoprocessing of Young's fringes", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.49538

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