Recovering the spectral and spatial information of an object behind a scattering media

TL;DR

This paper introduces a novel method for spectral imaging through scattering media by combining spectra retrieval with speckle-correlation, demonstrated via simulations and experiments, offering a flexible alternative to traditional spectrometers.

Contribution

The paper presents an effective approach that integrates spectra retrieval and speckle-correlation for spectral imaging through scattering media, using a frosted glass core element.

Findings

Successful numerical simulations of spectral and spatial information recovery.

Experimental validation demonstrating effective spectral imaging through scattering media.

Flexibility in core element choice compared to traditional spectrometers.

Abstract

Light passing through scattering media will be strongly scattered and diffused into complex speckle pattern, which contains almost all the spatial information and spectral information of the objects. Although various methods have been proposed to recover the spatial information of the hidden objects, it is still a challenge to simultaneously obtain their spectral information. Here, we present an effective approach to realize spectral imaging through scattering media by combining the spectra retrieval and the speckle-correlation. Compared to the traditional imaging spectrometer, our approach is more flexible in the choice of core element. In this paper, we have demonstrated employing the frosted glass as the core element to achieve spectral imaging. Obtaining the spectral information and spatial information are demonstrated via numerical simulations. Experiment results further demonstrate the performance of our scheme in spectral imaging through scattering media. The spectral imaging based on scattering media is well suited for new type spectral imaging applications.