摘要
紫外荧光法是指SO2分子在特定波长的紫外光照射下会产生荧光,通过检测荧光的强度就可以间接得到SO2的浓度。但大气中SO2浓度较低,荧光信号较弱,这就导致检测困难,在一定程度上限制了紫外荧光法的发展。针对这个问题,设计了用于采集荧光的光路。光路分别采用抛物面反射镜与菲涅尔透镜实现对不同发散角的荧光的准直,之后利用两个平凸透镜对平行光进行缩束,并使用两个平凸透镜汇聚荧光。采用射线追踪算法作为严格矢量分析的工具,对设计的光路进行仿真分析并与传统的荧光采集光路进行采集效果的对比,仿真结果表明该设计的光路采集荧光的效率要高于传统结构。
Ultraviolet fluorescence method refers to the fluorescence of SO2 molecule under the specific wavelength of ultraviolet light. The concentration of SO2 can be obtained indirectly by detecting the intensity of fluorescence. However, the low concentration of SO2 and weak fluorescence signal in the atmosphere lead to difficulties in detection, which limits the development of ultraviolet fluorescence to a certain extent. To solve this problem, an optical circuit for collecting fluorescence was designed. Parabolic mirrors and Fresnel lenses are used to align fluorescence at different divergence angles, then two flat-convex lenses are used to condense parallel light and two flat-convex lenses are used to converge fluorescence. The ray tracing algorithm is used as a rigorous vector analysis tool to simulate and analyze the designed optical path and compare it with the traditional fluorescence acquisition optical path. The simulation results show that the efficiency of the designed optical path to collect fluorescence is higher than that of the traditional structure.
作者
杨立洁
邢鹤园
王桂梅
张振兴
YANG Lijie;XING Heyuan;WANG Guimei;ZHANG Zhenxing(College of Mechanical and Equipment Engineering,Hebei University of Engineering,Handan 056038,China;CECEP Tldroad Technology Co. Ltd .,Beijing 102200,China)
出处
《光学技术》
CAS
CSCD
北大核心
2019年第5期526-530,共5页
Optical Technique
基金
河北工程大学与中节能天融科技有限公司校企合作项目:紫外荧光法大气微型站SO2分析模块研发
