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Large field-of-view (FoV) three-dimensional (3D) photon-counting imaging is demonstrated with a single-pixel single-photon detector based on a Geiger-mode Si-avalanche photodiode.By removing the collecting lens (CL) before the detector,the FoV is expanded to ±10°.Thanks to the high detection efficiency,the signal-to-noise ratio of the imaging system is as high as 7.8dB even without the CL when the average output laser pulse energy is about 0.45p J/pulse for imaging the targets at a distance of 5 m.A 3D image overlaid with the reflectivity data is obtained according to the photon-counting time-of-flight measurement and the retu photon intensity.