ABSTRACT A polarization and multispectral imaging system enables the acquirement of spatial, polarization and multispectral information of a target simultaneously, thereby improving capability in the detection and identification of low-contrast targets-an increasingly important attribute in many applications. In this work, we propose a simultaneous polarization and multispectral imaging system with a common aperture working at visible, mid-wave infrared and long-wave infrared wavebands. Two dichroic mirrors are used to spectrally split the beams into these three bands. For the visible spectrum, a division-of-focal-plane polarimeter is employed to acquire polarization information. Division-of-aperture-plane polarimeters with a cooled and uncooled detector are exploited in the mid-wave infrared and long-wave infrared, respectively. The division-of-focal-plane and division-of-aperture-plane polarimeters enable our system to achieve real time polarization imaging, which is suitable for moving targets. Simulation results indicate that our proposed system can meet the diverse imaging requirements in each waveband.

中文翻译：

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具有公共孔径的同步偏振多光谱成像系统的光学设计

摘要 偏振和多光谱成像系统能够同时获取目标的空间、偏振和多光谱信息，从而提高低对比度目标的检测和识别能力——这是许多应用中越来越重要的属性。在这项工作中，我们提出了一种同时偏振和多光谱成像系统，具有在可见光、中波红外和长波红外波段工作的公共孔径。两个分色镜用于将光束光谱分成这三个波段。对于可见光谱，采用分焦平面偏振计来获取偏振信息。分别在中波红外和长波红外中利用带有冷却和非冷却探测器的孔径平面偏振计。焦平面分割和孔径平面分割使我们的系统能够实现实时偏振成像，适用于运动目标。仿真结果表明，我们提出的系统可以满足每个波段的不同成像要求。