Polarization underwater imaging is of great potential to target detection in turbid water. Typical methods are challenged by the requirement on degrees of polarization (DoPs) of both target light and backscattering. A polarization descattering imaging method was developed using the Mueller matrix, which in turn derived a depolarization (Dep) index from the Mueller matrix to characterize scattering media by estimating the transmittance map by combining a developed optimal function. By quantifying light attenuation with the transmittance map, a clear vision of targets can be recovered. Only using the information of scattering media, the underwater vision under diverse water turbidity was enhanced by the results of experimental data.

为了解决以物像共轭为核心的传统成像技术信息获取方式受限、解译能力不足等造成的成像探测距离近、大视场与高分辨率实时成像难以及重建图像质量差等问题，以信息驱动为核心的计算成像技术应运而生，且在光电探测中表现出巨大潜力。本文从传统成像的瓶颈难点出发，阐述了计算成像的概念与内涵，着重分析了计算成像链路中计算介质、计算光学系统及计算处理在成像、探测中的作用与优缺点，并对计算成像在光电探测中的未来发展做了展望。

This paper presents a polarization descattering imaging method for underwater detection in which the targets have nonuniform polarization characteristics. The core of this method takes the nonuniform distribution of the polarization information of the target-reflected light into account and expands the application field of underwater polarization imaging. Independent component analysis was used to separate the target light and backscattered light. Theoretical analysis and proof-of-concept experiments were employed to demonstrate the effectiveness of the proposed method in estimating target information. The proposed method showed superiority in accurately estimating the target information compared with other polarization imaging methods.

针对凝视型红外成像告警设备中对场景目标进行大视场广域搜索与小视场精确识别一体化的应用需求，设计了一种基于共心球透镜的大视场高分辨率红外变焦成像系统.该系统采用由多层共心球透镜和可连续变焦的独立次级小相机阵列级联而成的二次成像结构，能够有效实现大视场高分辨率无畸变成像.此外，采用全动变焦设计的独立次级小相机阵列在对搜索到的目标进行探测、识别和跟踪的一体化检测的同时保持像面稳定，实现对成像场景的分区域管理.设计结果表明，该红外成像系统在全变焦范围内的调制传递函数（MTF）曲线均接近衍射极限，且变焦曲线平滑，避免了变焦过程中卡滞、冲击等不利现象的产生，能有效实现大视场监测及小视场识别的功能.