Dispersion control of broadband super-Rayleigh speckles for snapshot spectral ghost imaging

作者：Pengwei Wang, Zhentao Liu, Jianrong Wu, Xia Shen, Shensheng Han · 发表于：Chinese Optics Letters · 年份：2022 · DOI：10.3788/col202220.091102 · 被引用次数：5 · 研究领域：Random lasers and scattering media、Advanced Optical Imaging Technologies、Quantum optics and atomic interactions

Snapshot spectral ghost imaging, which can acquire dynamic spectral imaging information in the field of view, has attracted increasing attention in recent years. Studies have shown that optimizing the fluctuation of light fields is essential for improving the sampling efficiency and reconstruction quality of ghost imaging. However, the optimization of broadband light fields in snapshot spectral ghost imaging is challenging because of the dispersion of the modulation device. In this study, by judiciously introducing a hybrid refraction/diffraction structure into the light-field modulation, snapshot spectral ghost imaging with broadband super-Rayleigh speckles was demonstrated. The simulation and experiment results verified that the contrast of speckles in a broad range of wavelengths was significantly improved, and the imaging system had superior noise immunity.