Abstract
设计了一款能实现全天候清晰成像的全景监控摄像光学系统。采用全景环带结构形式,该结构分为摄像头部单元和中继透镜单元两部分,摄像头部单元完成全视场目标搜索,中继透镜单元将头部单元所成的中间虚像进行二次成像会聚到探测器上。设计时采用多重结构优化方式,实现可见光及近红外双波段成像。该光学系统视场为360°×(40°~100°),焦距为−2.75 mm,<i>F</i>数为3.28。设计结果表明:系统的MTF(modulation transfer function)值在全视场处接近衍射极限,各个视场的弥散斑半径均小于所选CCD像元尺寸,畸变小于2 %,且日夜离焦量小于0.002 mm,该设计结果可满足全天候全景监控需求。
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