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两片式远距结构消热差红外物镜

Xin Zhang,Yanfeng Qiao,Mingchao Zhu,Fengyun He,Hongguang Jia

Acta Optica Sinica（2014）

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Abstract
为解决光学消热差技术镜片多且结构复杂的问题,提出了一种两片式远距结构消热差光学设计方法.该光学系统由前折衍混合正透镜和后负透镜组成,衍射面补偿系统的大部分色差和小部分热差,剩余色差和热差由负透镜平衡.设计了用于非制冷红外探测器的长波红外物镜,焦距为120 mm,F数为1.2,远距比为0.9.调制传递函数(MTF)的设计值接近衍射极限,轴上30 lp/mm处MTF的实测结果优于0.45,成像质量优良.环境温度实验测试结果表明,-40℃～60℃温度范围内,靶标边缘锐利,无温度离焦.两片式远距结构消热差红外物镜适用于机载或弹载的轻量化光电系统.
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Key words
optical design,athermal design,infrared optical system,two-lens structure,telephoto objective
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