Patent ID: 7679725
Filing Date: 2010-03-16
Classification: G01B,G01C

Abstract:
1. A laser scanner apparatus for measuring two and three dimensional parameters of one or more objects on a platform: a waveform generator that generates a predetermined reference waveform; an analog laser diode that supplies a modulated laser beam responsive to the reference waveform; an optical scanning system for scanning the scene with a modulated laser beam and receiving a reflected modulated light from the objects on said platform, said optical scanning system having a hexagonal reflector connected to a series of computer control motors for moving said optical scanning system along a path; a photo-detector positioned to receive said processed modulated light from the hexagonal reflector of the optical scanning system, said photo-detector converting energy in said processed modulated light into a time-modulated signal; a first electrical circuit for converting the time-modulated signal into a converted sinusoidal waveform that has zero crossings in said time-modulated range signal; a second electrical circuit for converting the reference waveform into a second converted sinusoidal waveform that has zero crossings in said reference waveform; a phase comparator coupled to receive said first and second converted waveforms and output a signal indicative of the time difference there between; and a processor means for displaying and recording physical measurements of objects in specific location.