高分辨率旋转光栅光谱仪的设计
Design of a high-resolution rotating grating spectrometer
申佳琪 1杨照清 1傅伟 1王兴宇 1郭汉明2
作者信息
- 1. 上海理工大学 光电信息与计算机工程学院,上海 200093
- 2. 上海理工大学 光电信息与计算机工程学院,上海 200093;上海理工大学 上海市现代光学系统重点实验室,上海 200093
- 折叠
摘要
针对光栅光谱仪中高分辨率与宽光谱难以同时满足的问题,设计了一款基于旋转光栅的Czerny-Turner(C-T型)光路结构的高分辨率宽光谱拉曼光谱仪,激发波长为 532 nm,光谱范围为80～3 000 cm-1,分辨率为1.2 cm-1.将光谱范围分为低(80～1 450 cm-1)、中(855～2 225 cm-1)、高(1 630～3 000 cm-1)3 个波段,以优化中波段为主,对全波段进行了优化.通过微调光栅的旋转角度,确保低、中、高波段均位于CCD的有效像面上.该光谱仪成像系统的点列图、均方根图和调制传递函数图均符合设计要求.
Abstract
A high-resolution and wide-spectral Raman spectrometer based on a Czerny-Turner(C-T)optical configuration with a rotating grating was designed to address the trade-off between resolution and spectral coverage in grating spectrometers.The excitation wavelength was set at 532 nm,with a spectral range of 80～3 000 cm-1 with a resolution of 1.2 cm-1 The spectral range was divided into three bands:low(80～1 450 cm-1),medium(855～2 225 cm-1),and high(1 630～3 000 cm-1).Optimization was primarily focused on the medium band,while considering the entire frequency band.By fine-tuning the rotation angle of the grating,the low,medium,and high bands were all located on the effective image plane of the CCD detector.The point spread function,root-mean-square(RMS)wavefront error,and modulation transfer function(MTF)of the imaging system all met the design requirements.
关键词
光谱仪/高分辨率/旋转光栅Key words
spectrometer/high resolution/rotating grating引用本文复制引用
基金项目
上海市地方能力建设项目(21010502900)
出版年
2024
NETL
NSTL
维普
万方数据