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。
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 alongtrack 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.
作者
王伟
张露鹤
Wang Wei;Zhang Luhe(The 54th Research Institute of China Electronic Technology Group Corporation,Shijiazhuang 050011,Hebei,China;Hebei Key Laboratory of Photonic Information Technology and Application,Shijiazhuang 050011,Hebei,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2024年第12期348-352,共5页
Laser & Optoelectronics Progress
关键词
短波红外波段
倾斜刃边
调制传递函数
在轨测试
short-wave infrared band
slanted-edge
modulation transfer function
on-orbit test
