Abstract: A spectral converter which is to be used to produce chemical reactions. Full spectrum solar radiation is received, concentrated and directed into a blackbody collector. The collector converts the energy of solar radiation into heat. The collector then conducts the heat to a vapor phase material, such as selenium or mercury, which then re-emitts the energy as line spectra or broad band spectra. This radiated emission is caused to be directed in a particular direction from the collector through a window, which may be constructed of quartz. The radiation then passes through a filter, such as a dichroic filter which permits passage of only the desired range of radiation frequencies and causes all other radiation frequencies to be reflected back into the collector. The desired range of radiation frequencies is then conducted into an optical device which collimates the desired range of radiation frequencies.