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基于的等离子金属表面用于计算光谱测量,可见光的全覆盖范围

Qingbin Fan, Weizhu Xu, Peicheng Lin

|December 22, 2023

概括

我们开发了一个紧的光谱仪,用于便携式应用,使用等离子金属表面. 该设备覆盖了整个可见光谱,并显示了对入射光角度的耐受性,使宽带超光谱成像成为可能.

科学领域:

光学和光子学在光学和光子学.
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

便携式光谱仪对于环境,生物医学和农业应用至关重要.
目前的设备在带宽,光谱多样性和角度灵敏度方面面临限制.
等离子元表面为微型光谱设备提供了潜在的潜力.

研究的目的:

提出并演示基于等离子金属表面的紧光谱仪.
为了实现整个可见光谱 (400-750 nm) 的宽带运行.
为了评估超表面光谱仪的角度容忍度.

主要方法:

塑金属表面的设计和制造.
将超表面集成到一个紧的光谱仪中.
对光谱重建和角度敏感性的实验性表征.

主要成果:

超表面光谱仪在400-750nm可见波长范围内工作.
实验证明了有效的光谱重建.
该装置在±12°以内对入射光的角度耐受性.

结论:

等离子元表面可以构建紧的宽带光谱仪.
开发的光谱仪显示了便携式高光谱成像应用的潜力.
结果为大型视野超光谱摄像机铺平了道路.

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UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.