Design of a compact athermalized infrared seeker

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 287-290
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11801-017-7053-2

摘要

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 ℃ to 60 ℃,which is beneficial to the lightweight design of IR seekers.