Optical design of infrared dual band/dual field of view seeker

Table 1. Index of optical system
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Table 1. Index of optical system
Index LWIR/wide field LWIR/narrow field MWIR
Focal length/mm 21 53 20.92
Field of view 25.92°×20.80° 10.24°×8.27° 25.85°×20.80°

Table 2. Absorption coefficient of optical materials

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Table 2. Absorption coefficient of optical materials

Materials	Zns	ZnSe	Germ	IRG204
Absorption coefficient/cm^–1	0.15@ 10.6 μm	4×10^–4@3.8 μm	1.3×10^–3@3.8 μm	2.9×10^–2@48 μm
Absorption coefficient/cm^–1	0.15@ 10.6 μm	5×10^–4@10.6 μm	2.3×10^–2@10.6 μm	2.4×10^-–2@8.5 μm

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Yankai Mao, Zhenyu Zhao, Guohua Zhang, Guangyu Shi. Optical design of infrared dual band/dual field of view seeker[J]. Infrared and Laser Engineering, 2020, 49(7): 20190490

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