地球静止轨道凝视成像技术是航天遥感领域的重要研究内容.为了实现静轨对地不间断观测的目的,设计了一套覆盖地球全圆盘的大视场中波红外凝视成像光学系统.通过光焦度分配、光线高度控制和冷阑匹配,实现了大视场二次成像光学结构;根据现有面型检测水平,合理分配非球面,解决了多重像差问题.结合实际装调工艺,对温度适应性情况进行讨论.设计得到的光学系统视场达到 18°×18°,角分辨率为 72 .rad.设计结果表明,各个视场的 MTF在奈奎斯特频率处( 16.7 lp/mm)均大于 0.7,像元尺寸内能量集中度大于 83%,冷阑效率大于 98%.该系统有望在静止轨道红外探测相机、高灵敏度天文卫星等领域实现重要应用价值.

Geostationary Orbit(GEO) staring imaging technology is an important field of aerospace remote sensing technology research.A wide FOV of high-resolution secondary imaging optical system is realized by optical power distribution,materials athermal design and ray height control.Combined with the actual processing and detection level,the aspheric design method is used in the aberration balance.Finally,temperature adaptability is discussed.The designed optical system has a full field of view of 18°×18°,the IFOV is 72μrad.The results indicate that the modulation transfer functions(MTF) of all FOV at Nyquist frequency(16.7 lp/mm)are larger than 0.7,83% infrared encircled energy is concentrated in one pixel.Moreover,it could obtain well cold aperture efficiency of 98%.The staring wide FOV optical system could be widely applied in infrared detection camera and high sensitivity astronomy satellite in GEO orbit and other fields.