LASER COMPONENTS has for the first time developed a thin-film polariser that makes it possible to simultaneously separate the polarisations of three wavelengths. Designed for an angle of incidence of 45°, the optics show excellent reflection properties for s-polarisation in blue (450 nm), green (520 nm), and red (640 nm) light, while p-polarisation is almost completely transmitted.
In optical systems, such polarisers can be used, among other things, to combine linearly polarised laser beams from several sources – regardless of whether they have the same or different wavelengths. Conversely, these types of optics make it possible to separate unpolarised light at three wavelengths into the two polarisations simultaneously.
While the manufacture of thin-film polarisers is no longer an art, trichroid polarisers present a major challenge. The complex layer design is produced in our ion beam sputtering (IBS) facility, which enables particularly compact layer structures with good reflection properties.
