  LiDAR (laser based radar) systems are a major part of many new real-world
interactive systems, one of the most notable being autonomous cars. The current
market LiDAR systems are limited by detector sensitivity: when output power is
at eye-safe levels, the range is limited. Long range operation also slows image
acquisition as flight-time increases. We present an approach that combines a
high sensitivity photon number resolving diode with machine learning and a
micro-mechanical digital mirror device to achieve safe and fast long range 3D
scanning.
