| 摘要 |
<p>A concentrating photovoltaic apparatus for generating electric current from sunlight includes a photovoltaic cell having a rectangular (usually square) active area for receiving the incident beam and a concentrating assembly for concentrating the sunlight onto the front face in a shape which is generally square rather than circular and matches the active area. The assembly can use a single cylindrical focusing member, usually a Fresnel lens, focusing onto an array of the cells so that a strip formed by the lens is applied onto a strip of the cells. Alternatively the assembly uses two cylindrical lenses arranged to focus the sunlight into a square shape arranged to match a single lens. These can be used in spaced position so as to take a strip formed by the first and to focus the strip into the cell shape or they can be two Fresnel lenses into a common lens structure.</p> |
