调相光栅的正交相干相位检测

Orthogonal coherent phase detection of phase modulated gratings

本文提出了一种解调调相光栅相位的新方法.将一幅相位调制光栅图输入计算机,通过正交相干相位解调算法处理,能够高精度、快速地获得光栅的相位分布.本文详细论述了正交相干相位解调原理,并给出实验系统和处理结果,最后与其他类似的相位解调方法进行了比较.

A new method for phase detection of the phase modulated grating is proposed.. Phase distribution of the grating can be acquired quickly and sensitively by taking a phase modulated grating image into computer and processing it by using orthogonal coherent phase detection algorithm. The principle of the technique is introduced in detail and the experimental results are shown. Finally, the technique is compared: with other similar techniques.