Theory of 3D Laser Scanning

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Theory of 3D Laser Scanning

There is a wide range of scanning technologies available in the modern era to address a multitude of different applications, though 3D laser scanning in particular has opened new bounds especially in the engineering sector. 3D laser scanning is the utilization of a three dimensional data acquisition device to acquire a multitude of x, y and z coordinates on the surface on a physical object. These coordinate values make up a series of points, typically in accordance from a series of magnetic reference points placed around the object, to create a ‘point cloud’ which produces a polygonal mesh representation of the object. 3D laser scanning works by taking a physical object and digitally collecting data via its internal mechanisms by emitting a laser beam and detects its reflection to determine the shape and possibly its appearance in terms of colour and texture of the object. The collected data can then be used for various purposes such as constructing digital models for a wide variety of applications. The key capabilities of the chosen 3D scanning solution rely on its ability to effectively capture the required digital definition of the object with the required accuracy and data clarity to support the required deliverable. For most situations, a single scan will not produce a complete model of the object so subsequent scans are needed. All the scans need to be brought into a common reference system via a process called ‘alignment’, and then merged to create the complete model via computer software.

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The benefits of 3D laser scanning include:

  • Increase effectiveness working with complex parts and shapes
  • Help with design of products to accommodate externally designed and old parts
  • Replacement of missing or old parts

Scanning Process

Our specific 3D laser scanning tool is the ‘Handyscan 3D’, which is a modern day laser scanner which uses the VXScan software. Its net worth is around the thirty-five thousand dollar mark. It gives its user the complete flexibility to obtain the scan of a 3D object fast.

It operates using two stereoscopic cameras and a laser in the middle. The laser ...

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