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Optical filter / glass
The Edmund Optics colored glass bandpass filters are available in circular and square shapes. The optical bandpass filter’s transmission band is surrounded by two blocking bands that only permit part of the spectrum to pass through them. The optical bandpass filters have broad spectral bandwidths in either ultraviolet (UV), visible or infrared spectrums.The filter is nearly black and absorbs any visible radiation. This is an excellent choice for those applications in which ultraviolet or infrared detection is needed. Many times, UV filters are used for the selective transmission of 254 and 365nm mercury lines. Often, IR filters are used in night vision and IR sensing systems. There are eight filter sets available. A pre-loaded filter wheel is available too.