介绍了硫系红外玻璃的组成成分, 分析了其独特的优势, 建立了红外热成像系统中各个参数和温度之间关系的数学模型。基于硫系玻璃折射率温度系数小、成本低的优点, 将硫系玻璃应用于红外热成像探测系统, 并给出了一种折射式的中波红外热成像消热差探测系统实例, 评价结果表明, 该系统在低温-40 ℃、常温20 ℃、高温60 ℃都取得了良好的成像质量, 适用于像元数为320 pixel×256 pixel, 像元尺寸为30 μm×30 μm的中波红外凝视型焦平面阵列探测器。

The composition of novel chalcogenide infrared glass are introduced in this paper. Compared with other infrared glass, its advantages are analyzed. Mathematical model of relation between the temperature and other parameters in infrared detection imaging system is established. Benefitting from the less index temperature coefficient and low cost of chalcogenide infrared glasses, a refractive mid-wave infrared(MWIR) detection thermalization imaging system is presented. The design results indicate that the system has good imaging quality at the temperature of -40 ℃, 20 ℃ and 60 ℃.The system is compatible with staring focal plane array MWIR detector with 320 pixel×256 pixel and pixel pitch of 30 μm×30 μm.