针对现有的静态斜楔干涉具无法实现零光程差，进而影响光谱反演的准确性和复杂性。文中提出一种可以实现零光程差的斜楔干涉具，通过对传统斜楔倾斜面的改进，使其可以实现被测光包含零光程差的干涉信号，理论推导了该斜楔不同位置的光程差公式，并推导得出对应的光谱反演公式；采用硒化锌(ZnSe)材料设计了该斜楔，对其干涉信号、光程差和光谱反演进行了仿真研究，并采用10.64 μm激光器对其进行实验分析，实验结果显示该斜楔干涉信号清晰，光程差可以实现1 450 μm，反演光谱的误差为0.1%。

Existing static wedge interferometer can not achieve zero optical path difference, thereby affecting the accuracy and speed of spectral inversion. Therefore, a method of achieving zero optical path difference by improving the wedge structure was put forward. By improving the structure of the inclined surface, the wedge can be achieved on the incident light interference signal which contains zero optical path difference. By deducing and analyzing the optical path difference of the arbitrary wedge position, and the formula of spectral inversion was deduced. Using Zinc Selenide(ZnSe) materials design and processing of the wedge, interference signal and the optical path difference was simulated, and the process of spectral inversion was simulated. The wedge was analyzed by experiments which used 10.64 μm laser. Result shows that the interference signal clarity, optical path difference can reach 1 450 μm, and the relative error of experiment is 0.1%.