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Scanners in Dental Market
With the increasing prevalence of non-contact 3D scanning in recent years, people are faced with two specific types of 3D scanners more often than others: laser and whitelight. It is easy to get confused about how these two technologies compare with each other. Here is a brief overview of each technology:
3D Laser Scanners
Laser scanners use laser light to scanparts. 3D laser scanners commonly found today are either:
* Handheld where the stripe sweeps over the part like a paint gun or,
* Desktop where the laser line sweeps across a field to cover an areaThe handheld type is either attached to an arm or has targets on the handheld fixture to give constant readout of where the scanner is at any time. Another way to align data (which is shared withall 3D scanning) is to put photogrammetry markers on the parts as a basis for aligning scans into a complete 3D model.
3D White Light Scanners
White light scanners are usually desktop, where a fringepattern is generated by scanner's projector and is laid over an area at a time over the scan object. Within the scanning time, the fringe is modified in width and phase and the 3D scanner extracts the3D coordinates from calculating the returned patterns. The term “white light” comes from the fact that the bulb is a white light generator. In some systems, blue LED light is being used as areplacement so the term may need to accommodate blue light scanning. A more general description is called structured light scanning, which covers all colors.
Here is a list of comparisons between laser andwhite light scanners. This list is not exhaustive but it gives a general idea of the similarities and differences between them:
Technology
* 3D laser scanners sample the world one time as the linepasses the illuminated subject.
* White light scanners sample the world many times, with fringe patterns varying width and phase that redundantly estimate the shape of the subject. Due to the...