828-0.5 OD5

Ultra-narrowband optical interference filter with a 828 nm center wavelength (CWL), a 0.5 nm full-width at half-maximum (FWHM), and wide-range OD5 out-of-band blocking from 200 nm to 1050 nm. This is a multi-cavity filter with transmission that is greater than 85% at 828 nm. This unmounted ultra-narrowband filter is coated on a 2 mm thick polished Borofloat® substrate and is 25 mm (+0/-0.2 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.