Narrowband interference filter is a narrow bandwidth, allowing light to pass through a particular band, let the rest of the long-wave band shortwave cutoff or reflective optics. Our company's narrow channel interference filters using multi subdural by ion-assisted deposition nano-materials made of high vacuum evaporation, the film density is good, high-resolution imaging. Application: fluorescence analyzer, microplate reader, cable upgrade equipment, wireless transmission equipment, mobile barcode scanning, infrared whiteboard, infrared cameras, infrared touch screen, iris recognition, infrared medical instruments, infrared ink recognition, red film recognition, Face recognition sensor system. Handheld infrared laser range finder, laser range finder, optical instruments, medical and health equipment and testing instruments.