论文部分内容阅读
激光衍射测量的应用多局限于夫琅和费衍射,因为夫琅和费衍射暗斑间距与衍射体尺寸之间具有很简单的函数关系,而菲涅尔衍射光强分布非常复杂,缺乏解析的计算方法.本文首先从理论上证明,菲涅尔衍射暗斑分布与夫琅和费衍射是相同的,并通过实验数据证实了上述结论.同时,利用上述结论提出了一种新颖的衍射测量方法,能够有效地简化仪器结构,提高测量精度,扩展测量范围.
The application of laser diffraction measurement is mostly confined to the Fraunhofer diffraction, because the Fraunhofer diffraction has a very simple functional relationship between the diffraction spot size and the size of the diffractometer, whereas the Fresnel diffraction intensity distribution is very complicated and lacks analytical This paper first theoretically proves that the distribution of Fresnel diffraction and the Fraunhofer diffraction are the same, and the above conclusions are confirmed by experimental data.At the same time, a novel diffraction measurement method , Which can effectively simplify the structure of the instrument, improve the measurement accuracy and extend the measurement range.