可见与红外双波段光学系统的共变焦补偿方法

Common-zoom compensation method of visible and IR dual-band optical system

基于一种可见与红外双波段共光路成像探测光学系统,研究双波段变焦补偿方法。采用机械式正组被动补偿变焦形式,根据变焦理论对可见与红外双波段变焦比差异进行补偿。通过在变焦比较小的光路后拼接变焦比补偿光路,结合ZEMAX中的多重组态设置,调整并优化得到多个符合变焦比补偿的特征点,计算出随变倍组移动量变化的焦距变化曲线。研究表明,系统中可见与红外光路变焦比相差小,可实现可见与红外波段同时变焦。

Based on a visible and infrared dual-band co-channel imaging optical system,a dual-band zoom compensa-tion method is studied.According to the zoom and the mechanical passive compensation theory,the difference of visi-ble and IR dual-band zoom ratio is compensated.Combined with multiple configurations in ZEMAX,the multiple fea-ture points are obtained by adjusting and optimization,and the change curve of focal length with the shift change of zoom group is calculated.The results show that the difference of dual-band zoom ratio is small in this system,and it can achieve visible and infrared dual-band zoom at the same time.