【摘要】 相移技术对实现全息干涉计量中条纹的自动分析有非常重要的作用。在理论分析的基础上 ,提出用非线性方差法替代傅里叶峰值探测法 ,即用最小方差替代寻找最小值匹配函数的方法来校正全息干涉计量中PZT装置的非线性相移。实验研究结果表明 ,采用上述非线性方法校正相移比线性方法校正相移的误差大大降低更多还原

【Abstract】 A new method to calibrate a nonlinear phase modulater in the holographic interferometry is proposed. Instead of using Fourier peak finding method to find the average of the rectified difference, we take the average of the squared differences, namely, use least squares error to fit a function. The experiment results show that the reduction of the error in nonlinear calibration methods is much greater than that in linear calibration methods.更多还原