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FARO® Knowledge Base

Best Practices for Using Laser Tracker SMRs, Targets, and Tooling and the Impact on Measurements

FARO Laser Tracker

Overview

The quality of Laser Tracker measurements depend upon the precision of the target. Click here to download a white paper that explains the types of laser tracker targets and when particular targets should be used. This paper also explains the critical properties of Laser Tracker targets and the impact they have on measurements.

First, learn how Laser Trackers measure distance (Interferometer and Absolute Distance Meter) and how the target’s characteristics can impact measurements. Three types of targets and how they are constructed will be covered, including spherically mounted retroreflectors (SMRs), cateyes, and repeatability targets, with the most attention given to open-air SMRs.

Laser Tracker SMR
Caption: Spherically Mounted Retroreflector

It is common for SMR manufacturers to place emphasis on the centering of the optics in their specifications. But, other SMR specifications, such as sphere properties, dihedral angle error, maximum dihedral angle difference, wave front distortion, and polarization, impact measurement performance. A real-world example is given to illustrate the impact the design of Break Resistant SMRs has on SMR performance over temperature. Finally, learn how to determine if your SMR is in tolerance and SMR best practices--how to obtain the best accuracy with your Laser Tracker measurement system.

Video

In this 52 minute YouTube video, expert FARO Engineer Brian Groh, shows poplar applications for each tool in the Laser Tracker Tooling Kit. Tools extend Laser Tracker SMRs to maintain the best line-of-site for the laser when measuring challenging positions on a part. The Laser Tracker Vantage Tooling Kit contains additional tools that are not covered in this video. Use the video slider if you want to fast-forward to skim through this video.