... simultaneously the radiance temperature and the normal reflectivity, the true temperature of the measurement target can be determined without the previous knowledge of the optical properties of the sample. The method is based on the introduction and the definition of the diffusivity factor η d and the assumption...

... reflectance for extended lifetimes under severe outdoor environments. The long-standing goals for a solar reflector are specular reflectance above 90% into a 4 mrad half-cone angle for at least 10 years outdoors with a cost of less than $ 13.8 / m 2 (the 1992 $ 10.8 / m 2 goal corrected for inflation to 2002...

...C. E. Kennedy; R. L. Swisher Commercialization of concentrating solar power (CSP) technologies require the development of advanced reflector materials that are low cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. During the past nine years...

...Joseph A. Bonometti; Clark W. Hawk Basic material properties determine the amount of solar energy that is absorbed, transmitted or reflected and these values will often change with differing temperatures. This investigation developed a new approach to evaluate the material properties (i.e...