摘要
根据干涉型超光谱成像仪的原理、特点以及对星上定标的要求,介绍了几种星上定标技术,分析了几种定标方案的结构和优缺点。在一次像面上引入定标结构的方法是利用一次像面上狭缝两端的边视场或在狭缝旁开孔,引入定标光源实现定标。根据聚光结构的不同,定标光源使用聚光镜和自聚焦镜两种方案;全系统定标方法是通过摆镜旋转90°引入定标光源,可分为朗伯板定标系统和积分球定标系统。在实际设计中,根据光学系统、结构总体的实现可能性,选择了积分球定标系统的方案。经过分析对比,后者结构紧凑、光能量大,可实现全系统、全口径、部分视场定标。
This paper presents research of several calibration methods on secondary planet, according to principle and characteristic of the Interference Super-spectral Imager, and requirement of calibration on secondary planet. A method of Calibration based at first image plane makes use of two ends of narrow slit or a hole beside it to introduce the calibration light. There are two methods of converging calibration light, one is using convergent lens, the others self-focus lens. In method of whole system calibration, calibration light can be introduced by rotating the mirror 90 degree. Lambert reflector or integral sphere can be used in this calibration. Place Nd-in glass in optical circuit can achieve both radiometric calibration and spectral calibration. In actual, Analyzing the structure and characteristic, according to optic design and realization possibility of structure, a method of integral sphere used in calibration is chosen. By contrast, a calibration method of using integral sphere has compact structure and large energy, can be used to achieve the calibration of total system, aperture, and part viewing field.
出处
《遥感技术与应用》
CSCD
2004年第4期280-283,共4页
Remote Sensing Technology and Application
关键词
超光谱成像仪
空间调制
星上定标
Super-spectral imager, Spatial modulation, Calibration on secondary planet
