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研制了一种具有112°满视场的热成像仪。该热成像仪使用了一个带冷孔径光阑的F/1.2光学装置和一个512×512元PtSi肖特基势垒焦平面列阵(FPA)。模拟和分析了内部辐射和鬼像对热成像仪性能的影响。 实验结果证明,即使在60℃以上的环境温度下,该成像仪也不会达到饱和,而且入射的太阳辐射不会严重影响图象质量。还介绍了用小于4 mrad的高角度分辨率获得的图象实例。由这些结果可以表明,所介绍的模型对于分析热成像仪的性能是有效的。
A thermal imager with a full field of view of 112 ° was developed. The thermal imager uses an F / 1.2 optical device with a cold aperture stop and a 512 × 512-element PtSi Schottky barrier focal plane array (FPA). The effects of internal radiation and ghosting on the performance of thermal imagers were simulated and analyzed. Experimental results demonstrate that the imager does not saturate even at ambient temperatures above 60 ° C and incident solar radiation does not significantly affect image quality. An example of a picture obtained with a high angle resolution of less than 4 mrad is also presented. From these results, it can be shown that the presented model is effective for analyzing the performance of the thermal imager.