Laser & Optoelectronics Progress, Volume. 56, Issue 1, 010701(2019)

Identifying Phase Distortion of Interference Fringe Based on Energy Distribution

Yi Wang, Baogen Song*, and Yanjun Zhao
Author Affiliations
  • School of Electrical Engineering, North China University of Technology, Tangshan, Hebei 063200, China
  • show less

    In the measurement of surface topography of objects based on fringe projection, the fringe phase distortion is the main factor affecting the accuracy of object measurement. In order to accurately determine whether the fringe phase has phase distortion, the fringe pattern is analyzed from the frequency domain by means of Fourier transform in the phase correction algorithm, and a technique for discriminating the phase distortion of the interference fringe based on frequency domain analysis is formed. Using the basic principle of Michelson interference, the parallel beam interference projection device is built, the interference fringes are projected onto the light screen, the image is collected by the CCD camera, and the obtained interference fringe image is transmitted to the computer, and then the image is filtered by wavelet filtering. The noise and interference are transformed into a frequency domain image by Fourier transform, and the energy distribution information of the adjacent position of the fundamental frequency in the frequency domain image is analyzed to determine whether phase distortion occurs. The experimental results show that the method can accurately determine whether the fringe image has phase distortion, and the recognition sensitivity is 60 mrad.

    Tools

    Get Citation

    Copy Citation Text

    Yi Wang, Baogen Song, Yanjun Zhao. Identifying Phase Distortion of Interference Fringe Based on Energy Distribution[J]. Laser & Optoelectronics Progress, 2019, 56(1): 010701

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Fourier Optics and Signal Processing

    Received: Apr. 14, 2018

    Accepted: Jul. 18, 2018

    Published Online: Aug. 1, 2019

    The Author Email:

    DOI:10.3788/LOP55.010701

    Topics