Study on Phase Retrieval from Single Close Fringe Pattern with High Precision

Dong, 刘东 Liu; Yongying, 杨甬英 Yang; Chao, 田超 Tian; Yongjie, 骆永洁 Luo; Yongmo, 卓永模 Zhuo

doi:10.3788/cjl20103702.0531

Cited by 3 publications

(1 citation statement)

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“…The second is to extract the phase from a single shot interferometer fringe, for example, wavelet analysis [6][7][8][9], Hilbert transform [10][11][12][13][14][15], fast Fourier transform [16][17][18][19], regularized phase tracing method [20][21][22] and the energy minimization method [23][24][25] and so on. Compared with the phase shifting method, it does not require precise phase shifting devices and multiple interference fringes, and the phase distribution can be recovered by single shot interference fringe, and it is valuable for the study of transient or dynamic problems.…”

Section: Introductionmentioning

confidence: 99%

A High Precison Phase Extraction Algorithm from a Single Shot Interferogram

Hu,

Shen,

et al. 2023

J. Mod. Mech. Eng. Technol.

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Abstract. Phase shifting interferometry is an optical metrology with a high precision, but it usually requires the expensive high precision phase shifter. Therefore, low cost methods of extracting phase from a single shot interferogram were very valuable, but available algorithms are usually effective only in a limited conditions. To solve these problems, a novel method is presented in this work. Based on this method, the interference fringe is retrieved to a wrapped phase and divided into different regions and the index of the pixel is calculated. The pixels in the same region have the same parity and the PSF’s gravity center of part wavefront so as to solve the sign ambiguity. The theoretical simulation results indicate that the PV of wavefront error is 0.00054λ and the rms is 0.000125λ,which is much better than the results from the Fast Fourier Transformation method. The experimentally measured interferogram is also used to validate the method. It has the advantages of simplicity, high precision and effective for both open and closed interferometer fringes.

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