晶体光滤波器的设计。用matlab完成，根据给定的频率响应，设计出一个晶体偏振干涉光滤波器的结构参数，即晶体波片和偏振片的通光方向与参考方向x的夹角，并绘制出频谱图。-crystal optical filter design. Using Matlab completed, according to the frequency response. design a crystal polarization optical interference filter parameters, that is crystal wave plate and polarizer direction of the optical links with the reference direction angle x, and the mapping of the spectrum plan.