1645.7-2 OD2 Ultra Narrow Bandpass Filter



1645.7-2 OD2 Ultra Narrow Bandpass Filter


Ultra-narrowband optical interference filter with a 1645.7 nm center wavelength (CWL), a 2 nm full-width at half-maximum (FWHM), and wide-range OD2 out-of-band blocking from 400 nm to 1800 nm. This is a multi-cavity filter with steep edges, a flat top, and transmission that is greater than 90% at 1645.7 nm. This ultra-narrowband filter is coated on a 2 mm thick N-BK7 substrate and mounted in a 25 mm (+0/-0.1 mm) diameter, 3.5 mm (± 0.1 mm) thick anodized aluminum ring. 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.


Item Number 7302
Angle of Incidence 0 Degrees
Center Wavelength 1645.7 nm Nominal
FWHM < 2.3 nm
Transmission Band(s) 1645.7 nm > 90% T Absolute
Blocking Level OD2
Blocking Range(s)* OD2: 1654 to 1800 nm, 400 to 1637 nm
Filter Design Multi-Cavity
Substrate Type N-BK7
Dimensions 25.0 mm Diameter
Filter Thickness 2.0 mm
Assembly Type Anodized Aluminum Ring
Assembly Thickness 3.5 mm

Availability: In stock