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X-ray Crystallography02:18

X-ray Crystallography

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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...
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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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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...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

8.2K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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相关实验视频

Updated: Jul 25, 2025

Writing Bragg Gratings in Multicore Fibers
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Writing Bragg Gratings in Multicore Fibers

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通过白光的多波长布拉格衍射进行色彩再现.

Alexander Machikhin1, Alina Beliaeva1,2,3, Galina Romanova2

  • 1Acousto-Optic Spectroscopy Laboratory, Scientific and Technological Center of Unique Instrumentation of the Russian Academy of Sciences, 15 Butlerova, 117342 Moscow, Russia.

Materials (Basel, Switzerland)
|June 28, 2023
PubMed
概括

这项研究表明,多波长的布拉格衍射如何可以创建可调节的光源,用于准确的色彩再现. 这种声光学方法精确地控制光元件,在各种应用中提供高质量的色彩染.

关键词:
布拉格衍射法是什么?声光相互作用的交互.颜色复制 颜色复制图像处理是图像处理的过程.多波长光过的多波长光过方法频谱电力分布的分发方式

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相关实验视频

Last Updated: Jul 25, 2025

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 声学光学学是指声学光学学.

背景情况:

  • 精确的色彩复制对于工业,生物医学和科学领域至关重要.
  • 对于具有卓越色彩染能力的多功能,可调节的光源存在需求.

研究的目的:

  • 为了证明光的多波长布拉格衍射用于精确的色彩再现.
  • 探索使用声光学 (AO) 过来创建可调节的光源.

主要方法:

  • 利用双断晶体中的大量声波来调整光的频率和振幅.
  • 使用多带宽的白光声光学 (AO) 过.
  • 在CIE XYZ 1931色彩空间内实验验证色彩平衡和覆盖范围.

主要成果:

  • 在控制单色光组件的数量,波长和强度方面实现了高精度.
  • 证明了基于CIE XYZ 1931坐标复制特定颜色的能力.
  • 通过多次实验试验验证了色彩平衡.

结论:

  • 多波长布拉格衍射为高精度色彩再现提供了一种可行的方法.
  • 声光学方法使CIE XYZ 1931色彩空间几乎完全覆盖.
  • 这项技术促进了紧色彩再现系统 (CRS) 的开发.