Linear Laser Performance: How Distance and Environment Affect a Laser Tracker and Large Volume Scanner’s Linear Accuracy

Abstract

Laser Trackers and Large Volume Scanners are both popular tools in the 3D metrology world, but the similarities usually end there. The two are based on different technologies and are usually geared for different applications. One way to compare the two; however, is to measure how their linear accuracy and performance change with distance. Linear accuracy is determined by calculations that hold true in perfect environments, but how about the real world? Will a known distance measured a few feet away yield the same result as if it were measured 60 ft. away, even in a clean and stable setting? In this paper, we will put forth data from a controlled study that will shed some light on this issue and attempt to quantify the effects of real-world factors that could affect tracker and scanner accuracy.