日盲紫外单光子成像

In this study a solar-blind ultraviolet single-photon imaging system was developed The laser threedimensional imaging was realized within a distance of 0-400 m with 22-mm imaging precision by combining the single-photon detector with Geiger-mode Si avalanche photodiode Si APD and the time-correlated single-photon counting technique In the experiment a 266-nm pulsed laser source was used which is in the solar-blind band Due to the atmospheric absorption there is no background light noise at 266-nm wavelength on the surface of the Earth This significantly improves the antibackground noise ability of the single-photon imaging system Thus this system can be operated on a sunny day to realize all-day single-photon imaging within a middle-long distance.