近紫外天底成像光谱仪结构设计

Structural Design of Near Ultraviolet Nadir Imaging Spectrometer

针对大气环境监测和预报的需求,设计了一种满足光学系统要求的近紫外天底成像光谱仪。首先根据给定的光学系统,设计了设备的总体构形,对主镜和次镜进行了变密度拓扑优化,并对各模块进行布局功能设计;然后对方案进行了有限元仿真分析,同时对设备系统进行了光机热集成分析;最后进行了实验验证。实验结果表明:设备一阶频率大于100 Hz;正弦振动实验最大放大倍数为1.04;随机振动实验结果最大误差为4.72%;力学实验前后设备光谱特性一致。实验结果证明了所提结构设计满足各项技术要求,为今后近紫外天底成像光谱仪结构设计提供了一种新的参考。

According to the requirement of atmospheric environment monitoring and forecasting,a kind of near ultraviolet nadir imaging spectrometer which meets the requirements of optical system is designed.First,according to the given optical system,the overall configuration of the device is designed,and the primary mirror and secondary mirror are optimized by variable density topology,and the layout function of each module is designed.Then,the finite element simulation analysis is carried out for the scheme,and the optical,mechanical,and thermal integration analysis is carried out for the equipment system.Finally,the experimental verification is carried out.The experimental results show that the first order frequency of the device is greater than 100 Hz;the largest magnification of sine vibration test is 1.04;maximum error of random vibration test results is 4.72%;the spectral characteristics of the equipment are consistent before and after the mechanical experiment.Experimental results show that the proposed structural design meets the technical requirements,and provides a new reference for the structural design of near ultraviolet nadir imaging spectrometer in the future.