Opt Lett. 2021 Oct 1;46(19):4900-4903. doi: 10.1364/OL.431082.
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 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, strategies such as single-step measurement, high-speed projection, and undersampling can further improve imaging efficiency.
我们提出并实验证明了一种高效的单像素成像 (SPI) 方案，该方案通过将时间相关的单光子计数 (TCSPC) 与时分复用集成，在极低光水平下获取全色图像。该 SPI 方案使用数字微镜器件调制一系列具有预设延迟的激光脉冲，以实现三色结构照明，然后在 TCSPC 模块中采用光电倍增管进行光子计数检测。利用 TCSPC 的时间分辨能力，我们解调光谱图像编码信号，然后在单次测量中重建高质量的全色图像。基于该方案，单步测量、高速投影和欠采样等策略可以进一步提高成像效率。
