A Laser tracker provides a relatively fast, accurate and intuitive method of measuring large objects in industrial environments
What does it do?
Measure the three-dimensional location of a mobile target with an accuracy of a few microns, over a range of tens of metres
Why use this technique?
Laser trackers provide fast measurement of a target which can be moved almost anywhere within line-of-sight of the base unit. A key factor in favour of the Tracker is the high relative accuracy that can be achieved. As a consequence Laser Trackers have largely superceded more traditional methods such as Theodolites or conventional metrology tools such as collimators.
How do laser trackers work?
Laser trackers are based on the combination of two techniques: a laser interferometer to measure relative distance, and optical encoders to measure azimuth and elevation of a beam-steering mirror. Linear interferometers are a standard industrial measurement tool. They work on the principle of light interference.
(Fig Ref : http://www.directindustry.com/prod/api-automated-precision/laser-tracker-15655-43440.html)
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