Fresnel And Plano-convex Lenses
by David Parker
Title
Fresnel And Plano-convex Lenses
Artist
David Parker
Medium
Photograph - Photograph
Description
Computer simulation showing a comparison between a fresnel lens and a plano-convex lens (an equivalant conventional lens). The illustration shows 2 beams of light from below being brought to a focus. The lenses have been halved to show their different profiles. A fresnel lens, on the left, is a type of compact lens originally developed by french physicist Augustin-Jean Fresnel for lighthouses. The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. A fresnel lens can capture more oblique light from a light source, thus allowing the light from a lighthouse equipped with one to be visible over greater distances.
Uploaded
August 6th, 2016
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