低温背景红外目标成像实验研究

模拟低温背景红外场景是完成空间目标探测系统半实物仿真测试的关键技术,但利用现有技术模拟太空低温背景存在一定的困难.使用高低温箱法建立了一种低温背景红外目标辐射特性试验系统,并对红外目标在不同背景温度下的成像情况进行了研究,最后获得了红外目标成像与背景辐射的关系.实验结果表明,对于具有一定温度的黑体目标,背景温度在一定范围内变化时,探测器接收到的图像几乎没有变化,而且正焦位置与离焦位置具有相同的规律.这一结论对于在红外半实物仿真中模拟更低温度背景的红外场景具有一定的参考意义.

Experiment of Infrared Target Imaging against Cold Background

Simulation of infrared scenes against cold background is the key technology for the hardware-in-the-loop simulation test of a space target detection system. However, it is somewhat difficult to simulate the cold background in space with the existing technologies. A system for testing the radiation characteristics of an infrared target against cold background is established by using a high and low temperature chamber. The images of an infrared target obtained at different background temperatures are studied. Finally, the relation between the infrared target image and the background radiation is obtained. The experimental result shows that for a blackbody target with a certain temperature, the images received by the detector when the background temperature varies in a certain range have few changes. The same law can be obtained at both focal plane and defocusing plane. This conclusion is of reference value to the hardware-in-the-loop simulation of infrared scenes at lower background temperatures.