Acta Photonica Sinica, Volume. 46, Issue 3, 311005(2017)

A Two-step Phase-shifting Algorithm for Phase Calculation

ZHANG Xiao-xuan*, WANG Yue-min, HUANG Shu-jun, GAO Nan, and ZHANG Zong-hua
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    A fast three-dimensional object measurement method was proposed by combining the Fourier profilometry with the phase shifting profilometry. By accurately extracting the mean envelope of the fringe in time domain and simply filtering in frequency domain, the fringe can be pre-processed. Combined with the two-step phase-shift algorithm base on 90° phase shift, an accurate phase value can be obtained from two fringe patterns. The results of simulation and experiment of comparing the proposed method with the existing methods show that this method can achieve a higher accuracy, which the RMS (Root Mean Square) is less than 3×10-3 rad. The proposed method has the following advantages of good robustness for its insensitive to noise and surface mutation, fast operation and high accuracy. Therefore, it will have a high application value in the field of fast measurement.

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    ZHANG Xiao-xuan, WANG Yue-min, HUANG Shu-jun, GAO Nan, ZHANG Zong-hua. A Two-step Phase-shifting Algorithm for Phase Calculation[J]. Acta Photonica Sinica, 2017, 46(3): 311005

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    Paper Information

    Received: Sep. 5, 2016

    Accepted: --

    Published Online: Apr. 10, 2017

    The Author Email: Xiao-xuan ZHANG (330849890@qq.com)

    DOI:10.3788/gzxb20174603.0311005

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