Single-shot broadband scattering imaging based on speckle frequency refinement

作者：Juncheng Liu, Xiyuan Luo, Jing-bo Duan, Yi Feng, Meng Xiang, Dong Xue, Jinpeng Liu, Fei Liu, Xiaopeng Shao · 发表于：Chinese Optics Letters · 年份：2025 · DOI：10.3788/col202624.011101 · 被引用次数：2 · 研究领域：Random lasers and scattering media、Advanced Optical Sensing Technologies、Microwave Imaging and Scattering Analysis

The speckle correlation technique (SCT), a noninvasive scattering imaging technique, has attracted widespread attention but is limited by the requirement of narrowband illumination.To address this drawback, we propose a broadband scattering imaging method based on speckle frequency refinement, which can effectively extract the useful components of speckle under broadband illumination.We verified its effectiveness through experiments with 10-400 nm bandwidth illumination.Notably, even under 400 nm bandwidth illumination, comparable to white light, the structural similarity index measure (SSIM) of the reconstruction by our method can stay above 0.6.This method can reconstruct the object using single-shot broadband speckles, demonstrating its potential advantages in practical applications.