In MMS Spectrometers, a dispersive-grating geometry with a wide-area coded aperture takes the place of a traditional slit entrance.
在MMS光谱仪中，使用了色散光栅质谱法，并以大口径编码光阑代替了传统狭缝入口。
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The theoretical analyses show that the phenomena of drastic spectral changes were also found in Fraunhofer diffraction of a circular aperture and Young's double-slit interference experiments.
The results of simulation analysis to single slit, aperture and multi-slits show that this method is a simple and credible way to analyze Fraunhofer diffraction in teaching.