This proceedings covers the technical aspects of concentrating photovoltaics (CPV). CPV technology uses a comparatively cost-effective optic to concentrate the sunlight onto a small-sized solar cell made of semiconductor materials. Using this technology approach, lower cost on PV-produced energy level on $/k Wh is expected. The CPV technology features several systems approaches, all showing high operating system efficiencies. The state-of-the-art for the technology, but also critical issues for this technology are summarized in this proceedings book. Thus, this book is the most comprehensive summary for the CPV technology written by the most prominent scientist and engineers active in the field.