本文用衍射理论定量分析了扩展光源照明的双光栅系统中滤波狭缝对成象莫尔条纹形成的影响及作用,给出了狭缝的面内及离面位移量与条纹手移量及倾斜角间的关系.

In this paper the effect of the slit filter in a two grating system illuminated by extended light source on the formation of the final Moire fringes is discussed. The phenomena that the final frings will moveand tilt when the slit filter has displacements was analysed. It shows that the tilted fringes are a combination of many segments of fringes. The quantitative relations between the displacements of the slit and the mevement and tilting angle of the fringes are given. All the results are tested experimentally.