宽视场大相对孔径高光谱成像仪光学系统设计

发布时间：2018-01-31 06:12

本文关键词： 光学设计高光谱成像仪 Schwarzschild望远成像系统 Dyson光谱成像系统海洋水色　出处：《光学学报》2014年02期 　论文类型：期刊论文

【摘要】：宽视场大相对孔径高光谱成像仪已成为航空海洋水色遥感等领域的应用需求。根据宽视场和大相对孔径的研究目标,采用离轴Schwarzschild望远成像系统和改进型Dyson光谱成像系统匹配的结构型式,设计了一个视场为40°、相对孔径为1/1.8、工作波段为0.35~1.05μm的航空遥感高光谱成像仪光学系统。基于像差理论,分析了改进型Dyson光谱成像系统球差校正原理,运用光学设计软件Zemax对高光谱成像仪光学系统进行了光线追迹和优化,并对设计结果进行了分析。分析结果表明,设计的光学系统在各个波长的光学传递函数均不小于0.82,谱线弯曲和谱带弯曲均小于像元尺寸的5%。这便于光谱和辐射定标,完全满足设计指标要求,且系统体积小、重量轻,适合于航空遥感应用。
[Abstract]:Wide field of view and large relative aperture hyperspectral imager has become the application requirement in the field of aerial ocean water color remote sensing and so on. According to the research target of wide field of view and large relative aperture. A field of view of 40 掳and a relative aperture of 1 / 1.8 are designed by using the off-axis Schwarzschild telescope imaging system and the modified Dyson spectral imaging system. The optical system of airborne remote sensing hyperspectral imager is 0.35 ~ 1.05 渭 m. Based on aberration theory, the spherical aberration correction principle of improved Dyson spectral imaging system is analyzed. The ray tracing and optimization of the optical system of hyperspectral imager are carried out by using the optical design software Zemax, and the design results are analyzed. The optical transfer function of the designed optical system at all wavelengths is not less than 0.82, and the bending of spectral line and band is less than 5 parts of the pixel size, which is convenient for spectrum and radiation calibration and fully meets the requirements of the design index. The system is small in size and light in weight. It is suitable for aerial remote sensing applications.
【作者单位】：中国科学院长春光学精密机械与物理研究所;
【基金】：国家自然科学基金(41105014)
【分类号】：O433.1;TH744.1
【正文快照】： 1引言高光谱成像仪是20世纪80年代开始在多光谱遥感成像技术基础上发展起来的一种新型航空航天光学遥感仪器,能同时获取目标的高光谱分辨率信息和高空间分辨率的信息,在海洋、陆地和大气遥感等航空和航天领域得到了越来越广泛的应用[1-3]。目前国际上具有代表性的机载高光谱成

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