光学学报, 2019, 39 (11): 1130002, 网络出版: 2019-11-06  

棱镜型空间外差光谱技术研究 下载: 866次

Study on Prism-Based Spatial Heterodyne Spectrometry
叶松 1,2史新政 1李树 1,2,*汪杰君 1,2王新强 1,2
作者单位
1 桂林电子科技大学电子工程与自动化学院, 广西 桂林 541004
2 广西光电信息处理重点实验室, 广西 桂林 541004
摘要
提出了一种棱镜型空间外差光谱技术设计方案。该技术将传统空间外差光谱仪中的衍射光栅替换为色散棱镜和平面反射镜,分析系统轴上光路,给出了元件参数之间的匹配关系。利用仿真软件对干涉图进行理论仿真,并分析了色散棱镜的折射率和顶角角度对光谱分辨率的影响。设计并搭建了棱镜型空间外差光谱技术验证平台,采用635 nm和650 nm波长的光源初步验证了实验平台的可行性。实验结果表明:在色散棱镜采用BK7玻璃(650 nm波长下折射率为1.51452)和顶角角度设置为30°的条件下,得到的光谱分辨率为1.07 nm,通过仿真计算可以得到光线的能量利用率为94.43%。实验结果与理论仿真基本一致,验证了设计方法的可行性与科学性,为空间外差光谱技术的研究提供了一个新思路。另外,通过选用更高折射率的色散棱镜和增大顶角角度等手段,还可以进一步提高光谱分辨率。
Abstract
In this study, the design scheme for a prism-based spatial heterodyne spectrometry is presented. This technology is implemented by replacing the gratings in a traditional spatial heterodyne spectrometer with dispersion prisms and plane mirrors. Axial optical path analysis is employed to derive the matching relationship between the component parameters. A theoretical simulation of the interferogram is performed using simulation software. The influences of the refractive index and vertex angle of the dispersive prism on the spectral resolution are analyzed. The experimental platform of the prism-based spatial heterodyne spectrometry is developed to provide a preliminary verification of its feasibility at wavelengths of 635 nm and 650 nm. The experimental results show that the spectral resolution is 1.07 nm when the dispersion prism is set to BK7 glass (refractive index of 1.51452 at wavelengths of 650 nm) and the vertex angle is 30°; the simulation results show that the light energy utilization rate is 94.43%. The experimental results are consistent with the theoretical results, thereby demonstrating the feasibility and scientificity of this design scheme and providing new concepts for the study of the spatial heterodyne spectrometry. In addition, the spectral resolution can be further improved by selecting a higher-refractive-index dispersion prism and increasing the vertex angle.

叶松, 史新政, 李树, 汪杰君, 王新强. 棱镜型空间外差光谱技术研究[J]. 光学学报, 2019, 39(11): 1130002. Song Ye, Xinzheng Shi, Shu Li, Jiejun Wang, Xinqiang Wang. Study on Prism-Based Spatial Heterodyne Spectrometry[J]. Acta Optica Sinica, 2019, 39(11): 1130002.

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