The paper discusses the difficulty presented in deducing Fourier transform formula due to the lens aperture restriction, and analyzes the desired conditions in using the formula in great detail.
2
基于这种变频法思想，结合傅里叶变换频谱分析法推导了介质损耗参数的工频等效计算公式和算法。
Applying Fourier transform frequency spectrum analysis, the equivalent formula and arithmetic for calculating the dielectric loss at power frequency are deduced.
3
采用菲涅耳衍射公式和傅里叶变换得出了输出面上的光场的理想计算公式。
The Fresnel diffraction formula and the Fourier transforms are used to get the intensity distribution formula.
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