Long-Standoff vs. Short-Standoff Scanners

摘要

Speak with any optics expert about improving the accuracy of today's common 3-D laser scanners and you will be subjected to a barrage of abbreviations and terms such as CCD, CMOS, base angles and diffuse vs. spectral reflectivity, to name a few. When it comes to improving the accuracy of coordinate measuring machine (CMM)-based laser scanners, it is important to avoid putting the cart before the horse. For manufacturers that must hold extremely tight tolerances on their parts, tactile measurement often is their only means of highly accurate measurement. Rather than tackle the physical limitations of laser scanner triangulation with respect to accuracy, laser scanner manufacturers have been pouring their research and development efforts into a variety of probe enhancements. While there are physical limitations when manufacturing long-standoff scanners, the limitations are fairly easy to overcome. Long-standoff scanners are yet another entry into the field of CMM-based laser scanning. Show less