Even with longer pulses, if you know the shape of the pulse, you can use a matched filter to get sub 5 ns resolution on the detector side. [0] A drawback of fl

Even with longer pulses, if you know the shape of the pulse, you can use a matched filter to get sub 5 ns resolution on the detector side. [0] A drawback of flash lidar is that the light spread out with an inverse square law. With diffuse reflection, the returned power decays in an inverse zenzizenzic fashion [1]. Lidars with a collimated laser beam are far less affected by the inverse square law on the emission side, therefore getting better range and signal-to-noise ratio. [0] https://en.wikipedia.org/wiki/Matched_filter https://en.wikipedia.org/wiki/Matched_filter [1] https://en.wiktionary.org/wiki/zenzizenzic https://en.wiktionary.org/wiki/zenzizenzic