Bandpass filters transmit a certain wavelength range (pass band) and block all other parts of the spectrum (cut-off bands).
Usually, the filter design of bandpass filters is not only defined by pass and cut-off bands but also by CWL (Center Wavelength) and FWHM (Full Width Half Maximum).
There is typically an area of 10 - 50 nm for the bandwidth.
Our hard coatings afford us the ability to offer you higher quality designs with transmission values above 99% (VIS), average blocking above OD 10 by Design and edge steepness up to 0.5% of CWL from T50% to OD6.
With bandwidths down to 0.1 nm...
