Optical distance measurement

Pulsed time-of-flight measurement

The pulsed time-of-flight (ToF) method delivers a strong signal and allows the detection of several objects positioned behind each other (multi-echo). For example, measurements can be taken through vegetation or fog. The measurement rates are in the megahertz range and the distance resolution in the millimeter range. The measurement range extends to several hundred meters.

Phase shift measurement

In contrast to the pulsed time-of-flight method, the phase shift method delivers very high measurement accuracies in the millimeter or even submillimeter range. Measurement frequencies of up to several megahertz at measurement distances of under one hundred meters are possible. However, only one object can be detected.

Eye-safe, independent of lighting conditions, scanning

Both measurement methods can be implemented eye-safe with laser class 1 and are completely independent of lighting conditions. This means that measurements can also be taken at night, in situations where camera systems reach their limits, for example.

By deflecting the laser beam via a rotating mirror, not only a point but also an entire profile can be measured. This is the principle of a laser scanner.

Which method is best suited depends on the specific application. We will be happy to advise you and supply you with a tailor-made system for your application.