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Apparatus for shifting the wavelength of light. [US patent application]

Description: This invention, which resulted from a contract with the United States Department of Energy, relates to a means for shifting the wavelength of light and, more particularly, to a means for changing the wavelength of a laser beam so that the beam can be effectively used in a process for separation uranium isotopes. As disclosed in US Patent 3,940,615, /sup 235/U can be separated from /sup 238/U by selectively ionizing the /sup 235/U isotope in a vapor containing both /sup 235/U and /sup 238/U, thi… more
Date: January 29, 1982
Creator: McCulla, William H. & Allen, John D., Jr.
Partner: UNT Libraries Government Documents Department
open access

Segregated tandem filter for enhanced conversion efficiency in a thermophotovoltaic energy conversion system

Description: A filter system to transmit short wavelength radiation and reflect long wavelength radiation for a thermophotovoltaic energy conversion cell comprises an optically transparent substrate segregation layer with at least one coherent wavelength in optical thickness; a dielectric interference filter deposited on one side of the substrate segregation layer, the interference filter being disposed toward the source of radiation, the interference filter including a plurality of alternating layers of hi… more
Date: December 31, 1996
Creator: Brown, Edward J.; Baldasaro, Paul F. & Dziendziel, Randolph J.
Partner: UNT Libraries Government Documents Department
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