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为提高机载红外光学系统的环境适应性,保证红外系统在机载动态环境中能够稳定成像,提出一种无热化加权温度补偿方法,根据每个光学元件和间隔温度变化对系统成像影响程度的不同赋予不同的权重,建立在不均匀变化温度场中光学系统的加权温度补偿模型。利用光学设计软件仿真分析,工作温度在-50～+60℃范围内仿真误差<0.5%。建立了无热化光学系统的测试平台,对无热化加权温度补偿方法仿真分析结果进行实验测试。研究结果表明,加权温度补偿模型实用性强、精度高。在机载环境温度范围内,各项误差能够控制在1.5%,满足机载环境复杂红外光学系统的被动无热化的要求。
In order to improve the environmental adaptability of airborne infrared optical system and ensure the stable imaging of infrared system in the dynamic environment of airborne, a method of non-thermal weighted temperature compensation is proposed. According to the influence degree of each optical element and interval temperature on the system imaging The difference gives different weights to build a weighted temperature compensation model of the optical system in an unevenly varying temperature field. Using optical design software simulation analysis, the working temperature in the -50 ~ +60 ℃ simulation error <0.5%. The test platform of the non-thermal optical system is established, and the simulation results of the non-thermal weighted temperature compensation method are experimentally tested. The results show that the weighted temperature compensation model is practical and accurate. In airborne ambient temperature range, the error can be controlled at 1.5%, to meet the airborne environment complex infrared optical system passive non-thermal requirements.