656.2-1.5 OD6 Ultra Narrow Bandpass Filter



656.2-1.5 OD6 Ultra Narrow Bandpass Filter


Ultra-narrowband optical interference filter with a 656.2 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 656.2 nm. This ultra-narrowband filter is coated on a 2 mm thick Borofloat® 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 7236
Angle of Incidence 0 Degrees
Center Wavelength 656.2 nm Nominal
FWHM < 1.7 nm
Transmission Band(s) 656.2 nm > 90% T Absolute
Blocking Level OD6
Blocking Range(s)* OD6: 550 to 642 nm, 671 to 1100 nm; OD5: 200 to 550 nm
Filter Design Multi-Cavity
Substrate Type Borofloat®
Dimensions 25.0 mm Diameter
Filter Thickness 2.0 mm
Assembly Type Anodized Aluminum Ring
Assembly Thickness 3.5 mm

Availability: In stock


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