The R&D described in this document was conducted within the US DoE Solar Thermal Technology Program (STTP). The goal of the STTP is to advance the engineering and scientific understanding of solar thermal technology and to establish the technology base from which private industry can develop solar thermal power production options for introduction into the competitive energy market. In solar thermal technology, tracking mirrors or lenses concentrate sunlight onto a receiver. The heat absorbed by the receiver is converted into electricity or used as process heat. The two primary solar thermal technologies, central receivers and distributed receivers, use various point and line-focus optics to concentrate sunlight. This document reviews the state of the art of the design, manufacture, testing, and performance. You can download the 72 page document from the link above. of silver/glass mirrors for solar thermal systems applications.