Obstructed Line of Sight Measurement Using a Fold Mirror

Abstract

A fold mirror lets a laser tracker reach a discrete point or a mirrored surface it cannot see directly. Robert Elliott gives the technical background on mirror measurement with a tracker, then the practical part: how to set up and measure an obstructed target through a fold mirror, including the software commands. An experiment quantifies the error the method introduces, and the talk closes on best practice. The stated aim is to hand the audience a technique for measuring a feature that would otherwise be impractical to reach at all.