Narrow-band Single- and Multi-Notch Filters

Notch filters allow blocking a specific wavelength of light, while showing high transmittance for the remaining part of the spectrum. The bandwidth of the blockband can be as narrow as 15 nm in the VIS range. Multi-notch filters block up to 4 different wavelengths. Notch filters are composed of a complex multilayer stack deposited onto glass substrates. They can be designed for user defined blocking wavelength, blocking depth and angle of incidence.