波前编码技术在红外空空导弹上的应用研究

摘要

波前编码技术可以扩大光学系统的焦深，提高光学系统的无热化性能；也可以简化系统，减少光学零件数量。而空空导弹由于其体积较小，工作温度变化较大，其光学系统也面临着无热化设计和结构紧凑化设计等问题，因此研究波前编码技术在红外空空导弹上应用的可行性具有实际的意义。结合波前编码理论设计了一个适合于红外空空导弹，有效焦距f′为100 mm，F数为2，视场为±1.5°，工作波段为3～5μm的制冷型红外光学系统，通过Code V分析了光学系统在－45～60℃温度范围内的性能变化。%The depth of field of optical system is extended by wavefront coding and the athermalization of the system is improved. Besides, the system becomes simple and the lenses are reduced. The air-to-air missile is smaller than others and works in a huge temperature range. The athermalization and the compaction must be considered in design process. So studying on wavefront coding is important for infrared air-to-air missile. In this paper, an cooled infrared system for air-to-air missile with effective focal length as 100mm, F number as 2, FOV as1.5, operating wavelength ranging from 3μm to 5μm was designed. The property variation of system was analyzed within temperature range of-45℃ to 60℃ with Code V.