A Solar Concentrator is a device that focuses and concentrates sunlight in such a manner that its thermal energy may be extracted for useful purposes. Usually a parabolic reflector is employed to focus and concentrate sunlight. The Pond Science Institute has endeavored to create such a device pictured below.
Solar Concentrator - Prototype (courtesy Pond Science Institute) (click to enlarge)
Solar Concentrator - Frame (courtesy Pond Science Institute) (click to enlarge)
See Also
Solar Energy HEAT FROM VIBRATION heat multiplication Law of Heat Radiant heat WHAT IS HEAT 12.29 - Origin and Nature of Heat 12.31 - Heat Generated Through Resistance to Compression 7B.19 - Light and Heat