Interference Filters

We can provide imaging-quality narrowband (and wideband) interference filters custom-made to both function optimally within the optical column of our instruments and to meet your particular scientific needs. Filters can be manufactured anywhere in the 400-900 nm range for our visible instruments or 900-1,700 nm for our SWIR instruments.

Related Products

Some popular center wavelengths (CWLs) and bandwidths (FWHMs) are:

427.8 nm CWL x 3.0 nm FWHM

557.7 nm CWL x 2.0 nm FWHM

630.0 nm CWL x 2.0 nm FWHM

777.4 nm CWL x 2.0 nm FWHM

865.0 nm CWL x 10.0 nm FWHM

Optically, each filter is custom-made to function optimally within the optical column of our instruments, taking into account the particular ray angles impacting the filter (as required by our proprietary optical design) and the temperature at which the filter will operate.

Mechanically, our filters are designed to fit securely within the multi-filter wheels and single-filter drawers found on our instruments.

Center Wavelength (CWL) Tolerance	±0.15 x FWHM across clear aperture
Full Width Half Maximum (FWHM) Tolerance	±0.20 x FWHM across clear aperture
Blocking Range and Density	200-1000 nm, > OD 5.0, << 0.001% maximum
Peak Transmittance	45-95% (dependent on CWL and FWHM and style of filter desired)
Filter Outer Diameter (OD) Tolerance	+0.000/-0.010”
Filter Thickness	0.250” ± 0.030”
Clear Aperture	90% of OD