There are a great many contact and non-contact sensors for measuring workpiece surfaces.  Depending on the measurement task and the surface properties, a suitable sensor is selected.  The greatest flexibility comes with different sensors in a single measuring machine.

For surface measurements dimensions geometric tolerance and surface parameters of regular geometric elements or free-form surfaces measuring points are captured.  Optical sensors work with non-contact, which means that even sensitive workpieces and small features can be measured.

With area distance sensors several thousand measurement points are typically recorded at once.  This allows closed surface regions to be captured with a high point density.  When the autofocus method is used for several groups of image points or for every image point of the camera in parallel, a simple and fast three dimensional measurement is taken.

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