661.87-0.45 OD4 Ultra Narrow Bandpass Filter



661.87-0.45 OD4 Ultra Narrow Bandpass Filter


Ultra-narrowband optical interference filter with a 661.87 nm center wavelength (CWL), a 0.45 nm full-width at half-maximum (FWHM), and wide-range OD4 out-of-band blocking from 200 nm to 1200 nm. This is a multi-cavity filter with transmission that is greater than 85% at 661.87 nm. This unmounted ultra-narrowband filter is coated on a 2 mm thick Borofloat® substrate and is 50 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.


Item Number 7053
Angle of Incidence 0 Degrees
Center Wavelength 661.87 nm Nominal
FWHM < 0.55 nm
Transmission Band(s) 661.87 nm > 85% T Absolute
Blocking Level OD4
Blocking Range(s)* OD4: 200 to 642 nm, 682 to 1200 nm
Filter Design Multi-Cavity
Substrate Type Borofloat®
Dimensions 49.9 mm Diameter
Filter Thickness 2.0 mm
Assembly Type Unmounted

Availability: In stock


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