短波红外相机调制传递函数在轨测试
On-Orbit Test of Modulation Transfer Function for Short-Wave Infrared Camera
王伟 1张露鹤1
作者信息
- 1. 中国电子科技集团公司第五十四研究所,河北 石家庄 050011;河北省光子信息技术与应用重点实验室,河北 石家庄 050011
- 折叠
摘要
基于对倾斜刃边法在轨测试的基本原理,将倾斜刃边引入短波红外波段.选择边界清晰的地物目标作为刃边图像,详细分析在轨测试各流程,获取截止频率范围内的调制传递函数,其中在奈奎斯特频率处沿轨道方向和垂直于轨道方向的计算结果约为0.1.实验结果表明基于倾斜刃边的调制传递函数在轨测试能够克服地面像元分辨率对采样区域的限制,适用于小阵元、低分辨率的短波红外相机.
Abstract
Based on basic principle of slanted-edge for on-orbit test,the slanted-edge is introduced into the short-wave infrared band.By analyzing the on-orbit test processes,ground targets with clear boundaries are selected as edge images to calculate the modulation transfer function within the cut-off frequency.The results at the Nyquist frequency in the along-track and cross-track directions are approximately 0.1.The results show that the on-orbit slanted-edge-based modulation transfer function test method can overcome the limitations of ground pixel resolution on sampling areas,which is suitable for short-wave infrared cameras with small pixel arrays and low resolutions.
关键词
短波红外波段/倾斜刃边/调制传递函数/在轨测试Key words
short-wave infrared band/slanted-edge/modulation transfer function/on-orbit test引用本文复制引用
出版年
2024
NETL
NSTL
万方数据