A Fresnel lens 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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Parker, David |
Bildgröße: | 3940 px × 5253 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |