红外/激光双模导引头的光学系统

Optical design of the IR/ladar dual-mode seeker

为了实现防空导弹的自主精确制导,提出了一种共孔径红外成像/激光雷达双模导引头的系统方案,并设计了其中的光学系统。该方案采用被动红外成像与主动激光雷达制导两种模式,通过被动红外方式进行视场搜索并确认目标,然后切换为激光雷达制导方式进行目标锁定与精确跟踪。整个系统共用同一个接收口径,结构紧凑,符合导引头小型化的要求,并且既能满足目标搜索阶段大视场的要求,又能满足目标的精确识别与跟踪的要求。随后文中给出了光学系统参数的确定方法,并用CODEV光学设计软件设计了光学系统。所设计的光学系统具有较好的成像质量,可满足系统的性能要求。

In order to realize the autonomous precision guidance of air defense missile, the system scheme of the IR imaging/ladar dual-mode seeker with a common aperture was proposed and the optical system used in was designed. It included two homing modes, i.e. passive IR imaging mode and active ladar mode. The passive IR imaging system was used for searching and identifying target, and then was switched to the active ladar mode to lock and precisely track the target. The system had a common receiving aperture, and its structure was very compact, so it could meet the requirement for the miniaturization of the seeker. Besides, it also could meet the demands of a wide field of view for searching target, and the demands for accurately recognizing and tracking the target at the same time. Whereafter, the way to confirm the parameters of optical system was given and the optical system was designed with CODE V optical design software. The designed optical system in this paper has good image quality, and so fulfils the performance requirement of system.