850nm IR Band pass Filter for Vision

850nm IR Band pass Filter for VisionThe 850 nm wavelength band serves as a primary choice for infrared (IR) illumination in security and machine vision applications, supported by high-power LEDs—such as the OSRAM OSLON 850 nm device with a full width at half maximum (FWHM) of approximately 30 nm—and a wide range of compatible camera options. Time-of-Flight (ToF) systems are commonly available in both 850 nm and 940 nm configurations. The 850 nm band is particularly well-suited for general IR lighting applications where camera sensitivity is high, while the 940 nm band provides enhanced performance in daylight conditions due to the natural absorption of light at around 0.94 µm by atmospheric water vapor. Silicon-based detectors demonstrate strong responsivity across the 850–950 nm range, with peak performance typically observed near 960 nm. As with all interference filter technologies, the angle of incidence (AOI) must be carefully controlled to prevent spectral blue-shift and distorti…

Cut Off Type Glass Selective Absorption Type Glass Band Pass Filter