THERMO-OPTIC CONVERSION SYSTEM OF RARE EARTH COMPOUND

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PROBLEM TO BE SOLVED : To provide a thermo-optic conversion system of a rare earth compound that directly takes out a light energy from a heat source and uses a low-temperature waste heat as the heat source. SOLUTION : The system for taking out a light energy corresponding to difference in energy between orbits comprises heating a rare earth compound to a temperature higher than a normal temperature in an environment and transmitting electrons collected in a 5d orbit to a 4f orbit that has an energy level lower than that of the 5d orbit and has a vacancy. The light energy is an ultraviolet light. The rare earth compound whose temperature is lowered after light energy removal is returned to an original state in which the temperature is lowered to the normal temperature in the environment by radiational cooling etc., and reheated. COPYRIGHT : (C)2009, JPO&INPIT