Optical Evaluation of Composite-Based Reflector Facets for Parabolic Trough Concentrators

As a possible alternative to glass mirrors, the use of composite-based reflector facets has been investigated for use on parabolic trough concentrators. The approach evaluated here is a composite-based parabolic facet (steel and fiberglass) with a separately attached reflector. This paper describes the basic design of these structural facets and reports on the optical tests that have been used to determine the optical accuracy of the facets.