Bi685-49 | Bi685 Dark Red Interference Bandpass Filter

The MidOpt Bi685-49 is designed for use in certain aerial vegetative health monitoring applications. This filter isolates the 685nm wavelength range used in some red-light vegetative health indices when plants are stressed or dying, and photosynthesis slows or stops. IR wavelengths are absorbed, while more visible light–particularly red light–is reflected. Bi685 filters are also recommended for use with dark red laser diodes and LED lighting operating in the 680-690nm range, particularly when ambient light is overwhelming or separation from other red wavelengths is needed. All MidOpt filters can also be purchased unmounted or in custom dimensions upon request from Machine Vision Direct.