Dichroic Filters UQG Dichroic coated filters are glass filters with thin films and dielectric thin films vacuum deposited on glass substrates. These include Dichroic Colour Filters and Dichroic beamsplitting colour separating mirrors. Both are similar but the Dichroic Beamsplitters are used at 45°. Dichroic Colour Filters UQG dichroic Colour Filters include addition and subtractive colour filters. Transmitting and reflecting certain regions of the visible spectrum. The filters are practically absorbtion free non fading and highly transmitting. The addive colour filters are available in red, green and blue, substantive colours yellow, magenta and cyan.