The visible 640 nm red light makes alignment easier and provides good sensitivity with semiconductor cameras. In spite of the wavelength, the light output is always monochromatic and incoherent, which is ideal for illumination purposes as there are no chromatic aberrations or speckle. (Source: Cavitar)
At the PtU, the laser is used in combination with the High-speed Image Intensifier Camera hsfc pro with the aim to observe the process of impact welding. In addition to high speed imaging, the laser may also be used in certain applications as a strobe light.