中国激光, 2015, 42 (6): 0608004, 网络出版: 2022-09-23   

一种体相位全息透射式光栅的光谱仪分光系统

A Spectrometer Splitting-Light System Based on Volume Phase Holographic Transmission Grating
任重 1,2,*刘国栋 1黄振 1
作者单位
1 江西科技师范大学光电子与通信重点实验室, 江西 南昌 330038
2 南昌大学机电工程学院, 江西 南昌 330031
摘要
针对平面和凹面反射式光栅型光谱仪分光光路(SLP),存在像差大、谱面平直度差和衍射效率不高等不足,设计了一套基于体相位全息透射式(VPHT)光栅的分光光路。在理论探讨的基础上通过数值仿真模拟了VPHT光栅的衍射效率情况;为了充分验证所设计光路的可行性,实验中通过光谱定标验证了光路的光谱分辨率优于2 nm,通过最小二乘线性拟合算法得到定标波长与对应探测像元的校准关系式,对635 nm 波长采用多次测量取平均值,测试结果表明波长绝对误差为0.37 nm,整个定标波长点的均方根误差(RMSE)为0.3 nm;另外,使用了多项式拟合算法建立了200~800 nm 光谱范围内的波长偏移量与对应衍射波长的关系式,能较好地解决分光光路中波长校正的问题。
Abstract
To overcome some drawbacks of splitting-light path (SLP) for plane and concave grating typed spectrometer, including serious aberration, worse spectral fatness and low diffraction efficiency etc, a novel SLP based on volume phase holographic transmission (VPHT) grating is designed. For this grating, its manufacture and theories are investigated, and its diffraction efficiency is numerically simulated. In order to validate this designed SLP, the spectral scaling experiment is performed and the spectral resolution is better than 2 nm, the calibration equation between the scaling wavelength and corresponding pixels is gotten via linear least square fitting algorithm. It is proved that the wavelength absolute value is about 0.37 nm on the wavelength of 635 nm with the method of averaging multiple measurements, the root-mean-square error (RMSE) of full scaling wavelengths is 0.3 nm. In addition, for wavelengths of 200~800 nm, the relationship between wavelength biases and corresponding diffraction wavelengths is established via polynomial fitting algorithm, which can greatly solve the problem of wavelength calibration in SLP.

任重, 刘国栋, 黄振. 一种体相位全息透射式光栅的光谱仪分光系统[J]. 中国激光, 2015, 42(6): 0608004. Ren Zhong, Liu Guodong, Huang Zhen. A Spectrometer Splitting-Light System Based on Volume Phase Holographic Transmission Grating[J]. Chinese Journal of Lasers, 2015, 42(6): 0608004.

本文已被 5 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!