The 850nm bandpass filter is used in NIR imaging system to eliminate the influence of surrounding background light, including the visible and NIR. This filter is to increase the signal/noise ratio of the imager. The applications include secure monitoring, visual telephone, visual doorbell, digital telescope and other imaging systems.

Substrate

Float glass

Size

2×2mm ~ 81×81mm

Thickness

0.4,0.5,0.7,1.1mm

Surface Quality

40/20,60/40

400-800 nm

T<2%

835±10nm, 895±10nm

T=50%

830-870nm

Tave>85% Tmin>80%

950-1100 nm

Tave<2%