This text apply both the Fourier optics’ related functions and the analytical method of powerspectral,dicuss the digree of transparency of grating,analyses the powerspectral of Moire fringe as well as the transmission type of double grating electrooptical signal’s freqency spectrum.
本文运用傅里叶光学的相关函数及功率谱的分析方法,通过光栅透过率函数的相关讨论,分析了莫尔条纹的功率谱,以及透射式双光栅光学读数系统输出的光电信号的频谱。
参考来源 - 高精度绝对式编码器Sinc函数指示光栅的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Fig. 2. the structure of double grating monochromator.
图。2…双光栅单色仪结构图。
Based on Lau effect in double grating, the focal distance of lens is measured.
根据计量光栅的特点，可以利用双光栅效应测量透镜焦距。
Precise positioning using moire signal from double grating diffracting has high sensitivity and positioning accuracy.
利用双光栅衍射得到的激光莫尔信号进行精密定位具有很高的灵敏度和定位精度。
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