The UV-Vis-NIR narrow-band interference filter product series is the gold-leading product of HB Optical Co., Ltd. The main optical indicators of the product such as: wavelength positioning accuracy, half-wave bandwidth accuracy, form factor (degree of rectangularization), peak transmittance, etc. have all reached the level of similar international products.   Ultraviolet narrow band filter: 200～399 nm Visible narrow band filter: 400～740 nm Near infrared filter: 750～2500nm