Integrating the advantages of two single-pixel imaging schemes via holographic projection in ghost-imaging systems

TL;DR

This paper presents a novel ghost imaging system that combines two single-pixel imaging schemes using holographic projection, enhancing image visibility and enabling high-frame-rate, lensless imaging suitable for practical applications.

Contribution

It introduces an integrated approach that combines computational holography with ghost imaging, allowing flexible control and improved imaging performance.

Findings

Enhanced ghost image visibility regardless of hologram type

Successful projection of positive and negative ghost images

Achieved high-frame-rate, lensless imaging with improved practicality

Abstract

Computer-generated hologram (CGH) allows for the on-demand scaling and projection of artificially designed target patterns, while incorporating benefits such as a lensless setup and high-frame-rate operation. In this work, we actively control the projection pattern using CGH and integrate two typical single-pixel imaging (SPI) schemes, thereby implementing a ghost imaging (GI) scheme with flexibly tunable properties. Specifically, various reference signals from computational holography and the corresponding bucket signals are used in the intensity correlation algorithm. Accordingly, those GI results enable the parallel presentation of the outcomes from these two SPI schemes. In the experiment, two types of target patterns, intensity-squared chaotic speckle and artificially designed sparse matrix, are used to perform GI. Those imaging results indicate a significant improvement in ghost image visibility, irrespective of whether the reference signal is the reconstruction or target pattern of computational holography. Furthermore, we realize positive and negative copies of ghost image via holographic projection in which symmetrical mirror target patterns are artificially designed. Thus, by integrating these two SPI schemes, the lensless GI scheme based on CGH not only advances towards the visibility requirements for practical applications but also enables a high-frame-rate projection scheme essential for multi-frame intensity correlation measurements.