大视场四象限探测光学系统设计

Design of the large field optical system for four-quadrant detecting

为了实现大视场激光探测跟踪,分析了大视场激光探测光学系统的研制特点。首先,根据四象限探测对光学系统光斑均匀性的要求,结合系统的指标参数,选定合理的光学结构型式,提出像差校正的设计方案。然后,基于ZEMAX软件完成大视场四象限探测光学系统设计,并利用点列图、光线足迹图、包围圆能量定性评价系统光斑质量;通过TRACEPRO光学分析软件,得到探测器靶面的光线照度分布。最后,依据设计结果完成光学系统的加工装配及性能测试。测试结果表明:激光探测系统线性视场为±6°,测角精度优于0.15°,并根据实测数据针对线性视场进行曲线拟合,与理论曲线相符,验证了设计结果的正确性。

In order to realize large field laser detecting and tracking,the characteristics of optical system are analyzed. First,based on the requirement of light spots uniformity for four-quadrant detector and system indexes,the premium structure of optical system is selected and the method of aberration correcting is presented. Then the large field optical system for four-quadrant detector is designed by using the ZEMAX software. The light spots quality is evaluated by the spot diagram,footprint and encircled energy while the distribution of the rays illuminance on the quadrant detector is obtained by TRACEPRO software. Finally,manufacture and assembly for the optical system are finished and optical performance is tested based on designing result. Testing results indicate that linear field of laser detection system is 6 degree and precision of angle measurement is less than 0. 15 degree. Testing curve is consistent with theoretical curve,which validates correction of the design.