FARO Technologies, Inc.
METHOD AND APPARATUS FOR DETERMINING THE ACCURACY OF A DISTANCE MEASURING DEVICE

Abstract:

An apparatus and method for calibrating a distance meter using a double-pass configuration based on reflection off an intermediate retroreflector. The system includes a first distance meter operable to send a first beam light in a first path that intercepts a first retroreflector and a second retroreflector, to receive the first beam of light after reflection from the first retroreflector and the second retroreflector, and to measure a first distance traveled by the first beam of light, the first retroreflector being located at a first position. The system further includes a second distance meter operable to send a second beam of light in a second path that intercepts the first retroreflector, to receive the second beam of light after reflection from the first retroreflector, and to measure a second distance traveled by the second beam of light.