How It Works - KaVo Everest scan Base Camp Instructions For Use Manual

Instructions for use Everest scan pro, Everest scan eco, Everest scan Base Camp | Typ 4101, 4102
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3 Product description

3.3 How it works

3.3 How it works
The measuring method of the KaVo Everest scan is based on a 3-D measurement
with fringe projection.
The projection method is based on the mathematical principle of triangulation.
To measure distances, the coded light projector, the camera and the object to be
measured form the corners of the triangulation triangle.
The camera in a specific position takes a picture of the object illuminated by the
coded light projector and evaluates the distortions of the original symmetrical light
strips so that a three-dimensional image coordinate can be calculated for each
image point based on triangulation.
By turning and tipping the object, each relevant point can be precisely recorded
including overlapping locations.
Up to 13 different projection patterns are used in different positions.
The strip width of the light pattern becomes sequentially smaller until extremely fine
strip patterns are moved in steps within a strip width.
The phase length for reach pixel is determined from the recorded intensities. A
measuring precision of 20 µm is achieved using the phase shift method.
The object surface has to be reflected diffusely so that the projected strip patterns
can be detected by the camera with sufficient contrast.
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