Single Wavelength Band Partial Reflective Coatings(SPR)
When a narrow wavelength light is incident on this interface, part of the light is reflected and part is transmitted. Such coating always show a high reflective for S-polarization radiation and high transmission for P-polarization radiation. The main application of this coating is for beamsplitter. Also it is widely used in inspection system, so that we can get a part radiation for measure as a datum light.
Broadband Partial Reflective Coatings