Abstract
Quarter-wave plate (QWP) is one of the most important components of dynamic interferometer and its retardation can influence the measurement accuracy, which is usually manifested as periodic ripple error in the measurement results. Based on Jones matrix, the error formula is deduced in this paper, and the error correction method by rotating the half-wave plate (HWP) to change the intensity distribution in the four phase-shifted interferograms is proposed. In the experiment, the ripple error can be effectively suppressed when the background intensity of four interferograms tend to be the same. The performance of dynamic interferometer can be significantly improved through the proposed method.
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