九谱段焦面配准测试仪的研制  

Development of focal plane registration instrument for a nine-spectral camera

作　　者：常君磊[1] 李庆林[1] 张楠[1] 李富强[1] 于生全[1] 魏志勇[1] 王媛媛[1] 杨沐 Chang Junlei;Li Qinglin;Zhang Nan;Li Fuqiang;Yu Shengquan;Wei Zhiyong;Wang Yuanyuan;Yang Mu(Imaging Technology Research Department,Beijing Institute of Space Mechanics&Electricity,Beijing 100190,China)

机构地区：[1]北京空间机电研究所成像技术研究室,北京100190

出　　处：《红外与激光工程》2020年第3期316-321,共6页Infrared and Laser Engineering

摘　　要：多通道焦面遥感相机通道间的配准是相机总装定焦过程中的关键技术,通道间的配准精度决定了后续通道融合后的遥感图像质量。设计并完成了一套用于解决九谱段双通道焦面配准的测试仪。积分球照明一条狭缝,经平行光管成像在无穷远,照明九谱段相机,在相机焦面上得到一个竖直放大的狭缝像。四谱段、五谱段线阵探测器分别位于双通道焦平面上,分别调整双通道焦面的位置,计算四谱段、五谱段探测器上狭缝像的质心位置,通过质心位置来评价通道间像元的对准精度。该仪器解决了多通道焦面遥感相机通道间的配准问题,配准精度达亚像元量级,保证了通道融合后的图像质量。Multi-channel focal plane registration of remote-sensing camera is the key step in camera assembling process. Registration accuracy determines quality of the image after channel fusion. The development of focal plane registration instrument for a nine-spectral double-channel camera was proposed in this article. A slit was illuminated by integrating sphere and imaged at infinity with collimator. The infinity slit was recorded by the nine-spectral camera, and became an enlarged vertical slit on camera focal plane. The four-spectral detector and five-spectral detector were on two different focal plane channels. By approaching the slit image centroid position on two different detectors, the two focal plane channel were aligned together in high precision. This instrument solved the problem of high registration accuracy of multi-channel camera. Sub-pixel registration accuracy could be reached by the instrument, assuring the camera image composite.

关 键 词：遥感相机 多通道焦面 配准精度 多谱带 

分 类 号：TN29[电子电信—物理电子学] V443.5[航空宇航科学与技术—飞行器设计]