红外, 2015, 36 (6): 13, 网络出版: 2015-08-25
红外仿真中像面最大温差的计算方法
A Caculation Methold for Maximum Temperature Difference of Image Plane in infrared Simulation System
红外仿真 像面最大温差 计算方法 杂散辐射 infrared simulation maximum temperature difference on image plane calculating method stray radiation
摘要
针对红外仿真系统中杂散辐射会影响模拟像面温度均匀性的问题,提出 了像面温度偏差这一概念,并给出了像面最大温度偏差值的计算方法。建立了用于计算像面最 大温差的红外仿真系统简化模型。定义了能反映像面温度变化的局部辐照度偏差系数。推导了 局部辐照度偏差系数与像面最大温差的表达式,给出了红外仿真系统像面最大温差的一般计算 步骤。通过实际算例演示了该计算方法,并设计了验证实验。结果表明,测试得到的像面最大 温差均在理论计算数值范围内,从而验证了该方法的正确性和有效性。
Abstract
Aiming at the problem that the stray radiation in an infrared simulation system may affect the temperature uniformity on the simulated image plane, a conception of temperature difference on an image plane is proposed and a method for calculating the maximum temperature difference on an image plane is given. A simplified infrared simulation system model for calculating the maximum temperature difference on an image plane is established. A partial irradiance deviation factor which can reveal the change of temperature on the image plane is defined. The expression for the above factor and maximum temperature difference on an image plane is deduced. The common steps for calculating the maximum temperature difference on an image plane is also given. The calculation method is demonstrated in a practical infrared simulation system and is verified in an experiment. The results show that the measured temperature differences are all within the theoretical numerical range. So, the correctness and effectiveness of the method are verified.
王治乐, 徐君, 钱育龙. 红外仿真中像面最大温差的计算方法[J]. 红外, 2015, 36(6): 13. WANG Zhi-le, XU Jun, QIAN Yu-long. A Caculation Methold for Maximum Temperature Difference of Image Plane in infrared Simulation System[J]. INFRARED, 2015, 36(6): 13.