红外/激光双模共口径光学系统设计

Optical design of IR/laser dual-mode common aperture system

针对未来导弹的发展趋势,提出一种红外/激光双模共口径光学系统设计方案,可用于获取目标的双模信息。分析了光学系统的基本参数,研究了双模共口径系统的设计思想,并进行了光学系统设计。所设计系统实现了长波红外和激光双波段的共口径成像。红外部分相对孔径1.27,光学系统传递函数接近于衍射限;激光部分相对孔径0.63,接近于理论极限,成像光斑能量分布均匀,线性区范围内光斑变化较小。

According to the development of missile technology,a scheme of IR/laser dual-mode common aperture optical system which could obtain the dual-mode information of objects was proposed.The basic parameters of the optical system were analyzed,the design method of the dual-mode common aperture system was researched,and the optical system was designed.The system achieved common-aperture imaging at long wave infrared and laser wavebands.The relative aperture of the IR subsystem is 1.26,and the modulation transfer function approaches the diffraction limit.The relative aperture of the laser subsystem is 0.63,which approaches the theoretical value.The energy distribution of the imaging spot is uniform,and the spot size hardly changes in the range of linearity.