Archive > Volume 13 Issue 4 > 2017,13(4):287-290. DOI:10.1007/s11801-017-7053-2 CSTR:[cstr] Prev Next
Design of a compact athermalized infrared seeker
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Abstract:
In order to meet the application requirement of a certain long wavelength infrared (LWIR) seeker, a small volume, light weight and passively athermalized infrared (IR) objective is designed in this paper. The two-lens telephoto structure is adopted by merely using aluminum alloy as the housing material. By balancing the thermo-optical coefficient and thermal expansion coefficient of materials, an athermalized IR seeker with effective focal length of 90 mm and F number of 1.2 is achieved. The whole optical length is 75 mm, and the weight is only 234 g. The objective can remain fine imaging quality under temperature range from −40°C to 60 °C, which is beneficial to the lightweight design of IR seekers. Keywords:
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