根据单轴晶体的双折射效应及偏光干涉原理,利用Muller矩阵,对Lyot滤光片的设计原理进行了分析,指出该滤光片中各晶片对最小厚度晶片的厚度比可以有非整数比存在,给出了厚度为整数比和非整数比两个设计实例,并对其透射光谱进行了比较和讨论。

According to birefringent effect of uniaxial crystal and principle of polarization interference, the design principle of Lyot filter is analyzed by using Muller matrix. The theoretical analysis shows that the rational values of the thicknesses to the minimum thickness among the plates in the filter are possible to be non-integer. Several design examples of four-stage Lyot filter which have thickness in a non-integer and integer ratio are given, together with a brief discussion and comparison about their transmission curve.