Patent ID: 8292442

Claim:
Fresnel mirror for the directed reflection of light from a flat carrier part ( 10 ), wherein the flat carrier part has a Fresnel structure ( 20 ) on its upper side, wherein the individual steps ( 21 ; 22 ; 23 ;) of the Fresnel structure ( 20 ) exhibit a reflecting, planar surface as an effective face ( 30 ) for the directed reflection of sun light onto a focal point, wherein the Fresnel structure ( 20 ) is composed out of several sheet metal sections ( 11 , 11 ′, 11 ″, 11 ′″) made out of a steel sheet metal or out of a sheet metal of aluminum or an aluminum alloy or out of several profiles ( 12 , 12 ′, 12 ″) generated by extruding aluminum or an aluminum alloy, wherein connection means ( 13 , 14 ) are formed at the sheet metal sections ( 11 , 11 ′, 11 ″, 11 ′″) or, respectively, at the profiles ( 12 , 12 ′, 12 ″), which connection means ( 13 , 14 ) serve for a shape matching connection amongst each other.