双Wollaston棱镜分光特性的研究

对双Wollaston棱镜中光波的传播特性进行了细致和深入的分析,给出了棱镜中生成的两束光光程差的具体表达式,为偏振型空间调制干涉光谱仪的设计和应用提供了理论依据.在不同切割角条件下,对光程差与入射角的关系进行了计算机模拟.模拟结果表明光程差和入射角的关系具有较好的线性,切割角越大的线性越好.但是切割角大,光容易从棱镜侧面逸出.选择必要的切割角、合适的入射点和恰当的入射角范围是设计双Wollaston棱镜型干涉光谱仪必须考虑的问题.

Studies of characteristic of double Wollaston prisms

The transmission characteristic of beams created in double Wollaston prisms is discussed in detail, the exact expression is given and useful theoretical basis for design & application of spatial modulated interferometer are afforded. Under different cut-angle circumstances the optical path differences(opd) with different incident angles i is calculated accurately and completely. The results show that the opd versus i has nice linearity, and the bigger of cut-angle, the better linearity will be gotten. But the cut-angle is big, the beams escaping from the side face of the prisms is easy. The proper cut-angle, the suitable incident position and the appropriate range of incident angle is the most important question in design spatial modulated interferometer.