Presentation of a solar reflectometer coupled with a solar concentrator

Abstract: Devices and methods are presented in which an optical fiber reflectometer and a solar concentrator are used to determine solar reflectivity and absorptivity for opaque and diffuse materials. The measurements can be taken at high temperature, up to 25OO0C. First the specific reflectometer is presented. We will then describe the whole experimental hardware (solar installation, associated devices) and the method used to determine solar reflectivity and absorptivity. Finally, we will present examples of results obtained on a metallic sample. 1