可见与红外双波段光学系统的共变焦补偿方法

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。

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

Based on a visible and infrared dual band co channel imaging optical system,a dual band zoom compensation method is studied. According to the zoom and the mechanical passive compensation theory,the difference of visible and IR dual band zoom ratio is compensated. Combined with multiple configurations in ZEMAX,the multiple feature 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.