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Fresnel lens - Wikipedia
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Can a Fresnel lens be used backwards to gather light similar to how a convex lens does? - Quora
Fresnel lens - Wikipedia
Fresnellens - Wikipedia
Fresnel lens - Wikipedia
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From Ontology to Wiki: Automating Generation of Semantic Wiki Interfaces from Given Ontologies with Cascading Fresnel
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Fresnel lens - Wikipedia
Fresnel lens - Wikipedia
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Fresnel lens - Wikipedia
File:Fresnel lens assemblies, Museum of Scottish Lighthouses - geograph.org.uk - 562670.jpg - Wikipedia
Fresnel lens - Wikipedia
Fresnel Lenses & Focus
What is a Fresnel lens and how does it work? - Quora
Fresnellens - Wikipedia
