The heart of this build is not, as one might assume, some exotic laser device to measure ... the filament as it spools through the sensor; variations in diameter are amplified by the lever arm ...

Laser particle detectors ... These correspond to particles with a diameter of 1, 2.5, and 10 micrometers respectively. If you want to plug the sensor into another service, the Python library ...

When using a wavefront sensor, a single measurement is sufficient to characterise a laser beam with moderate ... wavefront curvature radius R, the 1/e2-diameter of the beam d(zm) and the beam ...