• CN: 11-2187/TH
  • ISSN: 0577-6686

›› 1996, Vol. 32 ›› Issue (5): 74-79.

• Article • Previous Articles     Next Articles

RESEARCH ON PHASE DETECTION METHOD FOR NONCONTACT WHOLE-FIELD 3-D SURFACE MEASURING

Cao Kang;Zhang Huiyuan;Zhou Xianbin;Cao Qixiang;Zhong Yuexian   

  1. Beijing University of Aeronautics and Astronautics Qinghua University
  • Published:1996-09-01

Abstract: The fundamental laws and features of the phase detection method for noncontact whole-field 3-D surface measuring have been investigated by method of optical function an Fourier spectral analyses. On the basis of analyzing the characteristics of the modulated grdating image in the frequency domain, the accurate phases and 3-D informations of testing surface are obtained. Therefore, the automatic profilometry of the 3-D object by computer has been completed and successfully applied to a automobile body part with good accuracy.

Key words: Fast Fourier transform, Out-of-plane Moire, Phase detection method, Spectral analyses