Full-color photon-counting single-pixel imaging

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 an extremely low light level. This SPI uses digital micromirror device modulate sequence of laser pulses preset delays achieve three-color structured illumination, then employs photomultiplier tube into the TCSPC module photon-counting detection. By exploiting time-resolved capabilities TCSPC, we demodulate spectrum-image-encoded signals, reconstruct high-quality in single round measurement. Based on this scheme, strategies such as single-step measurement, high-speed projection, undersampling can further improve efficiency.