实用双波段共孔径光学系统设计

Design of practical dual-band common aperture optical system

针对用于目标定位、威胁告警以及搜索跟踪等方面的双波段共孔径光学系统进行了研究,设计了一款将长波红外与激光相结合的双波段系统;该系统采用折射光学系统形式,在光路中采用分光片进行分光。该系统红外波段传递函数值在25lp/mm时所有视场均大于0.2,在激光波段0.7视场以内弥散圆直径小于0.6 mm,且该系统结构紧凑,既能满足目标搜索在捕获阶段的探测视场比较大的要求,又满足目标识别跟踪阶段的高分辨率要求,具有一定的实用价值。

Aiming at dual-band common aperture optical system for locating,warning and tracking,a dual-band opticalsystem combining long wave infrared and laser was designed.The system adopts the refractive optical system,and thebeam is split by a beamsplitter.The MTF of the system in infrared band is more than 0.2 at 25lp/mm ,the spot diam-eter is less than 0.6mm within 0.7 FOV of the laser band,and the system is compact.It can meet the requirement oflarger field in capturing target and the requirement of high resolution in tracking target,so the system has some practi-cal value.