Acta Photonica Sinica, Volume. 45, Issue 2, 212003(2016)
Two Frame Phase Shifting Shadow Moiré Using the Method of Varying Light Source
In order to measure the threedimensional profile of object′s surface quickly, a shadow Moiré technique with phase shift based on varying light source positions was proposed. By switching two light sources the method used, the phase shift was introduced into measurement view. The twodimension empirical mode decomposition was used to regularize the fringe pattern. Combining the spiral phase transform and two frames phase shift, the measurement height was estimated, the accurate measurement phase was picked up by using a new iterative adaptation algorithm. The results of the computer simulation and of the optical experiments indicate that the demodulation accuracy of the proposed methohd is better than the traditional two frames phase shift demodulation. Additionally, the proposed methohd greatly saves the measurement time by removing the mechanical motions in the process of measurement, since it only needs the two frames fringe pattern to demodulate the phase.
Get Citation
Copy Citation Text
ZHOU Xian, DU Hubing, WANG Jianhua. Two Frame Phase Shifting Shadow Moiré Using the Method of Varying Light Source[J]. Acta Photonica Sinica, 2016, 45(2): 212003
Received: Oct. 29, 2015
Accepted: --
Published Online: Apr. 1, 2016
The Author Email: Xian ZHOU (zhouxian_key@aliyun.com)