Optimal design of the laser synthetic wavelength interferometer

Liping Yan; Benyong Chen

doi:10.1117/1.OE.55.9.091401

2 March 2016 Optimal design of the laser synthetic wavelength interferometer

Liping Yan, Benyong Chen

Author Affiliations +

Funded by: National Natural Science Foundation of China (NSFC), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT), Program for Changjiang Scholars Innovative Research Team in University (PCSIRT)

Optical Engineering, Vol. 55, Issue 9, 091401 (March 2016). https://doi.org/10.1117/1.OE.55.9.091401

Abstract

From the actual implementation of displacement measurement in the laser synthetic wavelength interferometer, a nonlinear error analysis model was proposed by detecting the simultaneous zero-crossing position errors of two interference signals. By using this model, periodic nonlinear errors resulting from the polarizing leakage induced by the imperfection or misalignment of the polarizing beamsplitter in the basic configuration of the interferometer were analyzed. In order to reduce periodic nonlinear errors, two optimized optical configurations of the interferometer were presented. The simulations and experiments for verifying the performance of three configurations of the interferometer were performed. The experimental results demonstrate that the optimized third configuration has good stability, with a standard deviation of about 0.7 nm.

Citation Download Citation

Liping Yan and Benyong Chen "Optimal design of the laser synthetic wavelength interferometer," Optical Engineering 55(9), 091401 (2 March 2016). https://doi.org/10.1117/1.OE.55.9.091401

Published: 2 March 2016

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