Long wave pass filter also suitable for high-precision optical instruments, infrared flip the remote control, infrared ink recognition, automatic Zhitong equipment, biometrics, iris recognition and other equipment, 980nm long pass filter bandwidth Division I to be divided by half . 70nm, 50nm, 40nm three kinds according to the depth of the band cutoff points are: <0.5% 850.001% half-bandwidth: 70nm ± 5nm, 50nm ± 2nm, 40nm ± 2nm 200nm ~ 810nm T <0.1% (or T <0.5%, or T <0.01%) 930nm ~ 1250nm Tave <0.1% (or T <0.5%, or T <0.01%) appearance requirements: 60/40 at 690nm ~ 800nm ??light transmission zero, super good and timely sensitive CCD / COMS can not the impact of interference and penetration. After optimization products to solve problems 850led rainbow explosion generated heat lamps eliminate confounding factors beyond 900nm, to make products more perfect. In the current situation 850LED light is very mature, high-speed road security, environmental monitoring complex the best choice.