静、动态目标模拟离轴三反光学系统设计

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基于单色像差理论,确定同轴三反光学系统的初始结构参数,通过二次曲面系数为0的偶次非球面的高次项之间的平衡,校正离轴系统引起的非对称性像差,同时结合DMD(数字微镜器件)目标生成器,设计出一款采用离轴三反光学系统的平行光管,为坦克承载的被测光电设备提供室内模拟目标。本光学系统的设计指标是工作波段为0.2~1.2μm,有效焦距为3000mm,全视场为2°,F数为8。结果表明,系统各视场的波像差均优于λ/34(主波长λ=0.6328μm),传递函数MTF均优于[email protected]/mm,接近衍射极限,成像质量好。对系统进行公差分析之后,系统的传递函数值远优于[email protected]/mm,合理的公差分配使系统加工难度降低,装调检测更加方便容易。
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