Laser Triangulation

Laser triangulation refers to a machine vision technique used to capture 3-dimensional measurements by pairing a laser illumination source with a camera.

The laser beam and the camera are both aimed at the target object (shown in the diagram below), however by adopting a known angular offset (α) between the laser source and the camera sensor, it is possible to measure depth differences using trigonometry.

While the setup depicted here is typical in industrial settings, there are many 3D scanners that combine both the illumination source and the imaging sensor in one housing. For a simplified diagram on how Hermary’s 3D laser scanners work, you can read more about it here.

 

A typical laser triangulation setup