Dynamic imaging through scattering medium under white-light illumination [Invited]

作者：Junyao Lei, Hui Chen, Yuan Yuan, Yunong Sun, Jianbin Liu, Huaibin Zheng, Yuchen He · 发表于：Chinese Optics Letters · 年份：2024 · DOI：10.3788/col202422.060007 · 被引用次数：1 · 研究领域：Random lasers and scattering media、Advanced Optical Imaging Technologies、Advanced Optical Sensing Technologies

Imaging objects hidden behind turbid media is of great scientific importance and practical value, which has been drawing a lot of attention recently.However, most of the scattering imaging methods rely on a narrow linewidth of light, limiting their application.A mixture of the scattering light from various spectra blurs the detected speckle pattern, bringing difficulty in phase retrieval.Image reconstruction becomes much worse for dynamic objects due to short exposure times.We here investigate non-invasively recovering images of dynamic objects under white-light irradiation with the multi-frame OTF retrieval engine (MORE).By exploiting redundant information from multiple measurements, MORE recovers the phases of the optical-transfer-function (OTF) instead of recovering a single image of an object.Furthermore, we introduce the number of non-zero pixels (NNP) into MORE, which brings improvement on recovered images.An experimental proof is performed for dynamic objects at a frame rate of 20 Hz under white-light irradiation of more than 300 nm bandwidth.