A bandpass filter is an optical component that allows light of specific wavelengths to pass through while reflecting or attenuating light in other spectral bands. It can be categorized into narrow bandpass filters and wide bandpass filters. The operating range of bandpass filters can span from ultraviolet wavelengths such as 340nm and 365nm, visible light wavelengths including 405nm, 525nm, and 650nm, near-infrared bands like 850nm and 940nm, to mid- and far-infrared bands, among others. The wavelength can be adjusted according to customer requirements.

Product application fields: optical lenses and cameras in machine vision; laser rangefinders at 635nm, 650nm, 780nm, 905nm, 1550nm, etc.; IVD fluorescence analyzers, endoscopic light source systems, automotive applications, and more.