T oday distance and angle measurements are used not only in construction and positioning applications. In fact, these measurements are performed in various other fields, such as automotive and aerospace, for all kinds of applications including prototyping, reverse engineering or tooling inspection.
A key component in all metrology-related systems is the light source. Historically, a laser was used as a light source, however recently more and more systems have changed to SLEDs instead. Having the same high spatial coherence as a laser, it is primarily the low temporal coherence of SLEDs that alleviates or removes detrimental interference effects from reflections.