661.5-1 OD5 Ultra Narrow Bandpass Filter



661.5-1 OD5 Ultra Narrow Bandpass Filter


Ultra-narrowband optical interference filter with a 661.5 nm center wavelength (CWL), a 1 nm full-width at half-maximum (FWHM), and wide-range out-of-band blocking from 350 nm to 1000 nm. This is a multi-cavity filter with transmission that is greater than 95% at 661.5 nm. This ultra-narrowband filter is coated on a 2 mm thick Borofloat® substrate and mounted in a 50 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 7620
Angle of Incidence 0 Degrees
Center Wavelength 661.5 nm Nominal
FWHM < 1.2 nm
Transmission Band(s) 661.5 nm > 95% T Absolute
Blocking Level OD5
Blocking Range(s)* OD5: 450 to 650 nm, 673 to 850 nm; OD4: 850 to 1000 nm; OD3: 350 to 450 nm
Filter Design Multi-Cavity
Substrate Type Borofloat®
Dimensions 50.0 mm Diameter
Filter Thickness 2.0 mm
Assembly Type Anodized Aluminum Ring
Assembly Thickness 3.5 mm

Availability: In stock


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