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        Color Glass


        Delfa can manufacture color glass and band-pass filter glass with different sizes.

        1. Color glass

        Cut-off glass:  (Ultraviolet glass, Golden (yellow) glass, Orange glass, Red glass, Infrared transmission, Visible and Absorb glass)


        Selective Absorb Glass: (Violet glass, Cyanine glass, Green glass、Red glass, Infrared transmission, Visible and Absorb glass, Adiabatic glass, Sky-light glass, Rising color temperature glass, Falling color temperature glass)


        2. Band-Pass Filter Glass

        This kind of glass only transmits the light within a narrow wavelength range as shown in figure. The spectral characteristic is composed of maximum transmissivity (TM), wavelength of the peak (λM) , shortwave-cut-off wavelength, longwave-cut-off wavelength, and half-peak width.

        The wavelength corresponding to the half of the maximum transmissivity is (λ2) and (λ1). And the half-peak width is determined by (λ2-λ1). Shortwave (longwave)-cut-off wavelength is corresponding to the wavelength of “zero” transmissivity. But there are a few types which transmissivities of the longwave-cut-off wavelength can’t approach to zero, then they are determined by the transmissivity of the certain wavelength.