现有对地捷联导引头多数采用红外单波段和单视场相结合的方式对目标进行匹配和截获，然而该种方式在日益复杂的战场环境下易受目标/背景特性复杂程度、探测器性能、视场大小限制等因素的影响。在保留了某型捷联导引头原有单一的中波红外大视场的基础上，加入了长波红外大小两个视场，提出了一种新型的红外双波段/双视场导引头。通过利用中长波双波段的图像融合和长波红外下的双视场切换，突出目标与背景特征信息差异，可以有效提高导弹对目标的截获概率。采用CODE V软件设计了光学系统。整个系统采用共孔径式光学设计，具有较好的成像质量，满足系统要求。

At present, most of the strapdown seekers use the combination of infrared single band and single field of view to match and intercept the target, but this method is susceptible to factors such as target/background characteristic, detector performance, field of view in increasingly complex battlefield environment. On the basis of retaining the original single medium wave infrared large field of view of a strapdown seeker, a new type of IR dual band/dual field of view seeker was proposed by adding two long wave large and small field of view. By using the image fusion of medium and long wave dual band and the switching of dual field of view under long wave infrared, the difference between target and background feature information was highlighted, which can effectively improve the interception probability of missile to target. The optical system was designed with CODE V software. The whole system adopted the common aperture optical design, which had good imaging quality and meets the system requirements.