Noun
See under Lens.
Source: Webster's dictionaryA Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. Source: Internet
Close-up view of a flat Fresnel lens A Fresnel lens has its optical surface broken up into narrow rings, allowing the lens to be much thinner and lighter than conventional lenses. Source: Internet
In 2004, Benford proposed that the harmful effects of global warming could be reduced by the construction of a rotating Fresnel lens 1,000 kilometres across, floating in space at the Lagrangian point L1. Source: Internet
A Phase Fresnel lens uses diffraction to help cut down chromatic aberration, which is where the edges of objects have an odd color fringing, an image flaw most common in high-contrast edges. Source: Internet
The power of a Phase Fresnel lens in a revolutionary 300mm. Source: Internet
The first Fresnel lens was used in 1823 in the Cordouan lighthouse at the mouth of the Gironde estuary ; its light could be seen from more than convert out. Source: Internet