High-fidelity ghost diffraction through complex scattering media using a modified Gerchberg-Saxton algorithm

Single-pixel complex-field imaging through scattering media

Much research in optics was conducted to retrieve phase of the light field, e.g., via a reference wave (such as holography) or single-path optical diffraction. However, it is well recognized that a complete application of complex-field imaging (i.e., amplitude and phase) is still restricted by the existence of scattering media. In this Letter, we report high-resolution complex-field imaging with single-pixel detection, which can effectively suppress scattering effect. Complex fields are retrieved by using a series of collected single-pixel light intensities with an alternating projection (AP) method. A momentum and the denoising engine are integrated into the iterative process to increase convergence speed and reduce sampling ratios with quality enhancement of the retrieved complex fields. A series of optical experiments are designed and conducted, and it is experimentally demonstrated that the retrieved complex fields related to the object are of high quality. The proposed method could open an avenue for a wide range of applications related to complex-field imaging through scattering media.

A dual-modality optical system for single-pixel imaging and transmission through scattering media

It is well recognized that it is difficult to develop an optical system to retrieve effective information when dynamic and turbid water exists in an optical channel. It could be more challenging to incorporate dual or multiple modalities in one optical system. In this Letter, we report a dual-modality optical system for single-pixel imaging (SPI) and transmission through scattering media. A series of mutually-orthogonal random illumination patterns are designed and adopted to realize high-resolution image recovery in SPI. The data to be transmitted are also encoded into random illumination patterns in a differential way, and high-fidelity free-space optical data transmission can be simultaneously realized. Experimental results validate feasibility of the proposed optical system and its high robustness against scattering. The developed dual-modality optical system realizes high-resolution SPI and high-fidelity data transmission in scattering media using only one set of realizations, offering an efficient implementation with reduced power and equipment requirements. The proposed method is promising toward the development of an integrated system with multiple modalities for optical information retrieval, especially in dynamic scattering media.