光强和方位角误差对光弹性五步彩色相移法的影响

为了了解相移法中的各种参数所产生的误差对最终结果的影响 ,对一些主要参数做深入的误差分析是十分必要的。针对五步彩色相移法所用的白光入射平面偏振场的特点 ,只考虑光强、起偏镜和分析镜方位角所引起的误差影响就可以了。提出一个分析和评估这些误差源对五步彩色相移法确定等倾角参数所产生影响的方法 ,这对合理设计实验装置和执行正确的实验条件将起到积极的作用

Influence of intensity and orientation errors on photoelastic five-step color phase shifting

For knowing the accuracy of phase shifting (PST) influenced by the different err or sources, it is worth to analyze them qualitatively and quantitatively. When PST applies to photoelasticity, it exists a new error assoc iated with the configurations of the polariscope used to obtain the different in tensity distributions based on PST. Moreover, there is an error in measuring int ensities. Towards the five step color PST, it is based on a plane polariscope i n white light, the influence of the different error sources on the final calcula ted isoclinic results is analyzed and is estimated. It will have an actively inf luence on the reasonable design to experimental setup and the actual judge.