掩膜版调制关联成像的发展及应用(特邀)

Development and application of mask modulated correlated imaging(Invited)

关联成像作为一种新型的计算成像技术,使用不具备空间分辨能力的单像素探测器,结合空间光场调制技术,运用关联算法重构出目标的二维空间信息,成为近二十多年来广泛关注的研究课题。单像素探测器和结构光调制器作为关联成像中的两个核心要素,其性能直接决定了关联成像的各项指标。单像素探测器往往具有极高的光谱响应范围和工作带宽,但结构光调制器却少有与之匹配的性能。因此在一定程度上,结构光调制器的更新历程决定了关联成像技术的发展史。到目前为止,在关联成像中常用的结构光调制器有毛玻璃、空间光调制器、LED阵列以及掩膜版。其中,掩膜版作为一款有着悠久历史的结构光调制器,目前依旧是关联成像中空间调控的重要手段,并发挥着不可替代的作用。以关联成像的基本概念和发展历程为铺垫,着重介绍了一些基于掩膜版调制关联成像技术的工作原理及应用前景,并对非光学波段的掩膜版关联成像工作进行了简要的总结。

Correlated imaging, as a novel computational imaging technology, uses a single pixel detector without spatial resolution capability and combines with spatial light modulation technology to reconstruct twodimensional spatial information of targets by correlation algorithm. It has been a research topic of widespread concern for two decades. Single pixel detector and structured light modulator are two core elements in correlated imaging, and their performance directly determines the property of correlated imaging. Single pixel detectors often have a very high spectral response range and working bandwidth. In these respects, structured light modulators rarely match the performance of detectors. Therefore, to some extent, the renewal process of the structured light modulator determines the development of the correlated imaging technology. So far, the common structured light modulators used in correlated imaging include ground-glass, spatial light modulator, LED array and masks. Among them, masks, which have been used as a structured light modulator with a long history, are still an important choice for spatial modulation in correlated imaging and play an irreplaceable role. This paper started with the basic concept and development process of correlated imaging, analysed the working principles and application prospects of some existing correlated imaging technologies based on mask modulation, and briefly summarized the work of mask-modulated correlation imaging in non-optical wavebands.