Luminescence spectroscopic and temporal dynamic properties of high energy elementary excitations in CdF 2 -CaF 2 superlattices have been studied utilising excitation with vacuum ultraviolet and X-ray synchrotron radiation while comparing the results with those obtained for CdF 2 and CaF 2 bulk crystals. It is shown that the optical properties of the superlattice structures are determined by exciton emission in the CdF 2 monolayers. The experimental manifestations of exciton confinement phenomena are discussed. V