基于微型电机镜的小型共聚焦拉曼和激光诱导分解光谱成像系统
Xu Wang1, Lirong Qiu1, Yun Wang1
1MIIT Key Laboratory of Complex-filed Intelligent Exploration, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China.
Analytica chimica acta
|August 9, 2024
概括
一个新的小型仪器结合了拉曼光谱和激光诱导分解光谱 (LIBS) 进行高分辨率的元素和分子分析. 这项技术提高了用于太空和地质勘探的化学分析准确性,克服了以前的系统尺寸限制.
科学领域:
- 地质化学 地质化学
- 行星科学 行星科学
- 分析化学 分析化学
背景情况:
- 未知矿物的高分辨率元素和分子结构分布分析对太空和地质勘探至关重要.
- 现有的拉曼-LIBS成像方法难以平衡成像性能与系统体积.
- 需要具有高性能的小型拉曼-LIBS成像.
研究的目的:
- 开发一个小型的拉曼-LIBS成像仪器,用于微样本的增强化学分析.
- 为了提高精度,将拉曼光谱和激光诱导分解光谱 (LIBS) 的分布信息结合起来.
- 在系统体积和成像性能方面克服现有方法的局限性.
主要方法:
- 开发了一个小型的拉曼-LIBS成像仪器,利用微电机 (MEMS) 镜像技术.
- 采用双 2D MEMS 镜像扫描来缩短光学长度并提高混合光谱信号检测效率.
- 实现了大约40nm的轴向聚焦能力和700nm (拉曼) 和9.5μm (LIBS) 的横向分辨率.
主要成果:
- 成功获得了石Tisserlitine 001的3D高分辨率拉曼-LIBS混合光谱分布图.
- 在混合光谱成像中展示了高成像性能和小型化.
- 该仪器实现了现场频谱和多谱成像,具有高空间分辨率和稳定性.
结论:
- 开发的小型拉曼-LIBS仪器是现场化学分析的强大工具.
- 它可以为太空和地质勘探提供准确的组成和结构信息表征.
- 该仪器解决了对高性能小型化混合光谱成像的关键需求.
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