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Structured Light

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Structured Light

Sick3D

For many years structured light has been the most common approach to obtaining 3D image data. Typically done by projecting a laserline onto the surface of a moving object on a conveyor. Afterwards performing simple triangulation on the geometry of the camera, laser line and reflected laserline may extract the height information and 3D info. Companies such as SICK and LMI technologies have a well developed portfolio of structured light systems that come pre-calibrated. For many types of applications this is a solid and robust method. It does require either the object to be moving past the system or a movement of the system itself. A single system will also have limitations when it comes to occlusions on the object.