相关实验视频

Updated: Sep 11, 2025

$Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction$

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

几何衍射和刀刃衍射图案中的特征

Xianming Meng, Ludovic Rapp

Journal of the Optical Society of America. A, Optics, image science, and vision

|August 12, 2025

概括

这项研究揭示了刀刃衍射边缘的新凸性,在反射和穿透衍射模式中观察到. 这个现象,这个现象.

科学领域:

光学和光子学在光学和光子学.
波浪现象是一种波浪现象.

背景情况:

刀刃衍射是一种成熟的光学现象,已被研究了200多年.
最近的研究发现了一个新的特征:衍射边缘的洞性及其近至远场方向逆转.

研究的目的:

实验性地研究来自各种刀刃的衍射边缘的凸性.
为观察到的刀刃衍射模式提供理论解释.

主要方法:

从各种刀刃类型进行了关于衍射的全面实验.
采用基于无限小的结构的分散反射的方法进行理论分析.

主要成果:

观察并证实了在反射和透射衍射场景中衍射边缘的凸性.
证明了边缘的方向逆转,从近场到远场.

结论:

这项研究验证了衍射边缘的凸性作为刀刃衍射的特征.
扩散反射模型成功地解释了在质量和数量上观察到的衍射模式.

更多相关视频

$Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene$ 08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

$High Pressure Single Crystal Diffraction at PX^2$ 11:32

High Pressure Single Crystal Diffraction at PX^2

Published on: January 16, 2017

相关概念视频

X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...