海面的强镜面反射导致强烈太阳耀光, 造成海面目标探测中目标丢失.针对该问题, 利用渥拉斯顿棱镜的分光特性及海面杂波的偏振特性, 设计了一种中波红外实时偏振成像系统, 经分光在同一探测器上获得两幅偏振态相互正交的目标场景偏振子图像.并通过偏振子图像计算场景偏振度, 结合目标与背景的偏振特性差异, 为准确识别目标提供依据.结果表明, 该系统能够有效抑制太阳耀光, 并能够充分利用偏振度实现目标探测.

In marine target detection, a target could be lost by a mid-infrared detector if it’s located in sun glint area. Aiming at this problem, a real-time mid-infrared polarization imaging system employing a Wollaston Prism was designed which utilized the polarization characteristics of sun glint. The Wollaston Prism enabled beam separation into ordinary and extraordinary rays which vibrate at two orthogonally polarized directions, and two images were acquired on the same detector plane with light focused by an imaging lens. Degree of polarization of the target scene could be calculated and assist to detect marine targets. It enables effective sun glint suppression and marine targets detection.