DB940 Dual Bandpass Filter Visible + 940nm NIR

A DB940 filter passes visible and reflected 940nm LED light without impacting system MTF. 940nm LEDs do not emit the faint red glow associated with 850nm and other lower near-IR LED wavelengths. Using a DB940 filter over or behind the lens allows full color imaging during the day and covert surveillance at night. However any camera’s spectral response at 940nm will be lower than at other, shorter near-IR wavelengths, so relative sensitivity of each camera’s imaging sensor at 940nm must also be considered. DB940 filters also see use in many automated inspection and 3D point cloud imaging applications.