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Posted: Tue Aug 11, 2009 5:59 am Post subject: Phase based versus Time of Flight Noise
Hi,
I am currently researching the use of laser scanners for deformation monitoring, i was just wondering whether anyone would be able to advise as to why phase based scanners provide results which are much noisier than time of flight scanners? This has been tested ona number of surfaces, with similar results?
TOF scanners compute the distance for each point based on the return time of the laser light giving you a more accurate calculation for each point where as the phase based measures a larger area simultaneously based on the phase shift of the light and therefore the accuracy decreases exponentially over distance and produces a higher volume of errant less accurate measurements.
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