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相关概念视频

Spectrophotometry: Introduction01:16

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Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
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UV–Vis Spectroscopy: Beer–Lambert Law01:09

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The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...
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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
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相关实验视频

Updated: May 2, 2026

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material
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使用非线性校正阵列光谱辐射计测量0/45反射系数.

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    此摘要是机器生成的。

    准确的反射系数测量需要系统的线性. 本研究提出了一种用于精确反射率和线性校准的光学设置,最大限度地降低了阵列光谱辐射计的不确定性.

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    科学领域:

    • 光学工程是指光学工程.
    • 计量学 计量学 计量学
    • 频谱辐射测量 (Spectroradiometry) 是一种用于测量光谱的方法.

    背景情况:

    • 反射因子测量跨越广泛的动态范围,需要高度线性系统的准确性.
    • 现有的方法面临着非线性和光谱流浪光的挑战,影响测量不确定性.

    研究的目的:

    • 描述用于反射因子测量的光学配置.
    • 为了在相同的设置中实现线性测量.
    • 为了最大限度地减少反射率因子的测量不确定性.

    主要方法:

    • 开发了一种线性校准装置,集成黑体源,光圈和白色扩散器.
    • 确保的光谱辐射和分布与集成球的反射系数测量相匹配.
    • 修改了用于反射率因子和线性评估的光学配置.

    主要成果:

    • 校准设施实现的光谱辐射范围与整合球体光源相同.
    • 这种设置显著减少了非线性和光谱流浪光的影响.
    • 在380-780 nm的白色扩散目标中,达到1.20%-0.54% (k=2) 的0/45反射因子测量不确定性.

    结论:

    • 描述的光学配置提供了一种方便而准确的方法,用于使用阵列光谱辐射计测量反射率因子.
    • 集成的线性校准降低了不确定性,提高了光谱测量的可靠性.
    • 这种方法为可见光谱的分散反射度测量提供了更高的准确性.