∅25.4 mm Visible Bandpass Filter, CWL = 640.0 ± 2.0 nm, FWHM = 10 ± 2 nm

Diameter 25.4 +0/-0.25 mm
Minimum clear aperture: 21.4 mm
Maximum thickness: 6.4 mm
Edge Treatment: Hermetically sealed in black  anodized aluminum ring
Humidity resistance: Per Mil-STD-810E
Optimum temp: 23° C
Temperature limits: -50°C to 80°C
Substrate material: Optical quality glass

Please see the attached catalog page for more information.