667.8-1.5 OD6

Ultra-narrowband optical interference filter with a 667.8 nm center wavelength (CWL), a 1.5 nm full-width at half-maximum (FWHM), and wide-range out-of-band blocking from 200 nm to 1100 nm. This is a multi-cavity filter with moderately steep edges, a flat top, and transmission that is greater than 90% at 667.8 nm. This unmounted ultra-narrowband filter is coated on a 2 mm thick Borofloat® substrate and is 25 mm (± 0.1 mm) in diameter. Alluxa ultra-narrow bandpass filters have the highest transmission and narrowest bandwidths currently available. And because they are hard-coated using our innovative SIRRUS plasma deposition process, all Alluxa optical filters are highly durable and resistant to laser damage. Contact us for custom sizing options.