Concentrator photovoltaics (CPV) is a photovoltaic technology that generates electricity from sunlight. CPV photovoltaic systems use lenses and curved mirrors to focus sunlight onto small, but highly efficient, multi-junction (MJ) solar cells. To keep the sun focused on the relatively small solar cells, CPV systems use solar trackers to keep the focus on the solar cells and sometimes use a cooling system to further increase efficiency.

 

Some good general references are:

 

An Arizona example: Agua Caliente PV Power Plant Among World’s Largest

天天斗牛 大发麻将 足彩胜负14场 极品斗地主 捕鱼大作战