Reverse Engineering i.e. creating a digital representation of a physical object, is a powerful technique. It provides CAD definition of the actual model. To obtain the CAD definition, the information about the geometry and topology of the work component is required. This information should be in digital form. This digital representation of the actual prototype can be obtained by means of a technology that can scan the surface and/or interior of the component. Due to rapidly growing influence of Reverse Engineering of today's fast advancing technological world, several data acquisition systems have come to the market to scan the physical component. Presently in market a wide range of scanners are available. They can be classified as
These are mostly fitted with mechanical probes.