Presentation of a solar reflectometer coupled with a solar concentrator

Devices and methods are presented in which an optical fiber reflectometer a nd a solar concentrator are used to determine solar reflectivity and absorp tivity for opaque and diffuse materials. The measurements can be taken at h igh temperature, up to 2500 degrees C. First the specific reflectometer is presented. We will then describe the wh ole experimental hardware (solar installation, associated devices) and the method used to determine solar reflectivity and absorptivity. Finally, we w ill present examples of results obtained on a metallic sample.