photo credit: Randy Montoya, Sandia National Laboratories; image source
Parabolic Trough Solar Collector
This photo (hi-res version) shows a parabolic trough solar collector that heats oil in a pipe that runs along the focus of the mirrors. For further information visit Sandia's Solar National Thermal Test Facility. To learn about a breakthrough in aligning the mirrors, see Sandia invention. For related images, see TREK-UK.
Concentrating Solar Power
Here are some sites, with photographs, on solar energy: