Laser profile scanners and laser triangulation sensors equipped with a blue-laser diode offer numerous advantages over red-diode lasers. For decades, sensor specialist Micro-Epsilon has played a leading role in measurement applications based on Blue Laser Technology and has a worldwide applied-for patent on these applications, particularly on red-hot glowing and (semi-) transparent objects.
Instead of a red laser line, the Blue Laser diode generates a blue-violet laser beam with a wavelength of 405nm. The sharper focus creates a sharper projection of the laser beam with increased accuracy.
These sensors are also equipped with new high-performance lenses, new intelligent laser control and innovative evaluation algorithms. Unlike the long-wave red laser, the short-wave, blue-violet laser light hardly penetrates the measurement object. Particularly with organic materials such as wood or semi-transparent objects such as adhesive beads or plastic profiles, this effect becomes distinctively visible. The blue laser point or blue laser line is sharply imaged onto the surface and projected onto the sensor element, providing stable and precise measurement results.
The blue laser technology also has advantages on red-hot glowing objects. The long-wave radiation emitted by red-hot glowing objects dazzles the receiving elements of laser sensors that operate using red laser light. Blue Laser Sensors are equipped with optical elements that are not influenced by this radiation, and therefore allow stable distance and profile measurements of slabs, cast parts and glowing brake disks.
