We propose and experimentally demonstrate a high-efficiency single-pixel imaging (SPI) scheme by integrating time-correlated single-photon counting (TCSPC) with time-division multiplexing to acquire full-color images at extremely low light level. This SPI scheme uses a digital micromirror device to modulate a sequence of laser pulses with preset delays to achieve three-color structured illumination, then employs a photomultiplier tube into the TCSPC module to achieve photon-counting detection. By exploiting the time-resolved capabilities of TCSPC, we demodulate the spectrum-image-encoded signals, and then reconstruct high-quality full-color images in a single-round of measurement. Based on this scheme, the strategies such as single-step measurement, high-speed projection, and undersampling can further improve the imaging efficiency.
@article{arxiv.2109.02333,
title = {Full-color photon-counting single-pixel imaging},
author = {Ya-Nan Zhao and Hong-Yun Hou and Jia-Cheng Han and Hong-Chao Liu and Su-Heng Zhang and De-Zhong Cao and Bao-Lai Liang},
journal= {arXiv preprint arXiv:2109.02333},
year = {2021}
}