The sample should not be so large as to increase unduly the width of the diffracted beam . 样品不应当过分大,以致不恰当地增加了衍射束的宽度。
It diffracts the diffracted beam which effectively means that it generates an inverse transform . 它对衍射光束再发生衍射,这实际上意味着它产生了一个逆变换。
Comparison of two numerical simulation methods for hard - edged diffracted beams 两种硬边衍射光束计算模拟方法的比较
Instrument for straightness measurement using non - diffracting beam and moir 233 ; fringe 无衍射光莫尔条纹法直线度测量仪
For example , if the diffraction pattern is defocused by under - focusing the diffraction lens then the image of the specimen can be seen in both the direct and diffracted beams in the diffraction pattern and , since under - focusing the diffraction lens images a plane above the diffraction pattern , these images will not be inverted with respect to the diffraction pattern 比如,如果衍射模型是通过衍射透镜下焦散焦的,样本的映像就能在衍射模型中直接的衍射束中看到,但是由于衍射透镜下焦在衍射模型之上平面成像,这些映像就不会对应衍射模型倒置。