对光栅的布拉格衍射条件以及偏振对二维滤波的影响进行了理论分析。
The Bragg's condition and effect of polarization on performances of the two-dimension filter are also discussed.
分析讨论了原子全息与光学全息的区别，指出只有经激光冷却的原子束才满足全息技术所要求的相干条件和衍射条件。
Analyzing the difference of atom hologram and optical hologram, we point out that only the laser cooling atoms can satisfy the coherent and diffract conditions required by the hologram technology.
当颗粒粒径满足一定条件时，米氏光散射可以用夫琅和费衍射来近似。
When the diameter of the particles satisfied some conditions, Mie theory is approximate to Fraunhofer diffraction theory.
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