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Operating principle
RFP1 projects a sinusoidal fringe pattern onto the surface of the part and the camera takes images of the pattern deformation caused by the surface topology.
On a flat plane the pattern will be uniform:
![RFP horizontal lines flat - with close-up](/cmmsupport/knowledgebase/media/img/gen/0531091770e744318d3685ca3764447a.jpg)
Changes in surface topology cause deformation of the pattern:
![RFP horizontal lines wavey - with close-up](/cmmsupport/knowledgebase/media/img/gen/3010cf0b207a4e6f8f364204b28588ba.jpg)
The change in fringe intensity at each point is used to calculate the absolute 3D position of that point on the part surface. A patch of XYZ position data points is returned for each fringe capture with up to 640,000 points in each patch.
![RFP part condition](/cmmsupport/knowledgebase/media/img/gen/211c658f192f4af9a5716f1373c0f0c0.jpg)