Optics- and light-based metrology tools have found increased popularity in the quality control labs around the world. Non-contact nature, reliability, and maintenance-free operation of the light-based technology are just some of the advantages over the mechanical counterparts.
Due to its novelty, this cutting-edge technology lacks the intuitive feel of the mechanical gauge. In many cases it requires advanced knowledge of physics and optics to develop robust understanding of the capabilities and limitations. Tool selection and decision-making presents a significant undertaking on the part of the quality engineer.
Here we cover one important step during the purchasing process – selection of the optical probe head. While we target this discussion at the technology commercialized by Lumetrics, the general concepts are applicable to other similar metrology tools as well.