Newsmeldung von slashCAM: How do Fresnel lenses in headlights? Of thomas - 15 May 2009 17:20:00 Anyone who has ever asked why some headlamps radially ribbed discs have the will in this small article by giving an answer that explains what the effect on the light these so-called Fresnel lenses have.
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Antwort von geid0r:
in German:
Antwort von david2:
Can someone explain to me why the film / video using Fresnel lenses and never Planconvex (PC)? Good angerauhte have even a surface as synonymous, there would be no coloring.
Antwort von domain:
Fresnel lenses have the same properties for the pooling of light as conventional Konvexlinsen, only that they are flat and a lot of glass and save weight. The Lens is decomposed into concentric rings. The outermost ring corresponds to a more conventional Konvexlinse the innermost synonymous, just the whole unnecessary thick glass body underneath is removed and this is synonymous to all other rings to the center.
Antwort von Mac4ever1950:
Can someone explain to me why the film / video using Fresnel lenses and never Planconvex (PC)? Good angerauhte have even a surface as synonymous, there would be no coloring. The step by the lower thickness Linsendesingn possible heat loss is lower in comparison to conventional glass lenses and thus a lower heat. In addition, thermal stresses in the thinner glass by forming a better balance than in a thicker rigid Lens. Overall, this allows lower frequency of the burner and / or a higher burner performance and thus a more compact design.
