摘要
为了实现对大气层中辐射波长分布在真空紫外和近紫外波段(115～300nm)的粒子探测,完善大气遥感,设计了一种高分辨率成像光谱仪,并开展了原理样机的研制。根据国外已有载荷进行分析,选用了以离轴抛物镜为望远系统、Czerny-Turner结构为成像光谱系统的光学方案;针对真空紫外波段辐射弱的特点选取了带有MCP的二维光子计数型探测器。为了实现该光学系统的宽波段成像功能,在像差理论的基础上引入了几何与一阶微分的数学方法,解决了传统结构像差校正不均匀、空间分辨率低的缺点;最终设计得到了改进型的成像光谱仪。对设计结果进行模拟和光谱分辨率计算分析可知这种成像光谱仪全视场全波段调制传递函数值在0.6以上,光谱分辨率达到1.23nm,具有良好的性能。这种方案工程实现性好,性能优越,设计方法和设计结果合理可行。
A high resolution vacuum ultraviolet imaging spectrometer prototype carried by satellite applied to the atmosphere de-tection of particles distribution in 115～300nm was developed for remote sensing.First,based on the analysis of advancedloads,the optical system including an off-axis parabolic mirror as the telescope and Czerny-Turner structure as the imaging spec-trometer was chosen.Secondly,the 2-D photon counting detector with MCP was adopted for the characteristic that the radiationis weak in vacuum ultraviolet waveband.Then the geometric method and 1st order differential calculation were introduced to im-prove the disadvantages that aberrations in the traditional structure can not be corrected homogeneously to achieve perfect broad-band imaging based on the aberration theory.At last,an advanced example was designed.The simulation and calculation of re-sults demonstrate that the modulation transfer function（MTF）of total field of view is more than 0.6in the broadband,and thespectral resolution is 1.23nm.The structure is convenient and predominant.It proves that the design is feasible.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第12期3417-3422,共6页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(41074126)
应用光学国家重点实验室基金项目资助
关键词
真空紫外
成像光谱仪
像差校正
光谱分辨率
Vacuum ultraviolet
Imaging spectrometer
Spectral resolution
Aberration correction
