采用分离式光学补偿方式对传统连续变焦中波红外光学系统进行改进, 将变倍组和补偿组分开独立, 使系统同时满足超长焦距(916.2 mm)、超大视场(36°)、小型化的需求.变倍过程中变倍补偿曲线平滑、无拐点、像面稳定, 光学系统外形包络在335 mm×118 mm(局部169 mm)×100 mm(局部Φ168 mm)范围内, 系统结构紧凑, 像质评价结果表明光学系统像质良好, 能满足热像仪整机使用要求

The traditional continuous zoom middle wave infrared optical system is improved by the separation optical compensation method. The zoom group and the compensation group are separated independently to realize zoom and compensation, and the middle wave infrared optical system satisfies the ultra long focal length (916.2 mm), the ultra large field of view (36°) and the miniaturized demand of continuous zoom optical system. In zoom, the zoom compensation curve is smooth, no turning point, and the image surface is stable. The envelope of the optical system is within the range of 335 mm×118 mm (local 169 mm)×100 mm (partial 168 mm), the system is compact. The image quality evaluation of the optical system indicates that the image quality is good, and it can meet the requirements of the thermal imager.