For the electronics industry, 3D laser profiling applications include: verifying the presence of components on a PCB as well as measuring their heights releative to the board or verifying height measurements to help detect missing or misaligned substrates, to name a few.
http://www.cognex.com/3D-displacement-sensor-laser-profiler.aspx?cm_campid=CBE3862F-9518-E211-AE9B-5EF3FCDAF1B7