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How do you use a Fresnel?

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How do you use a Fresnel?

November 2, 2021
Latest company case about How do you use a Fresnel?

Fresnel lens, succession of concentric rings, each consisting of an element of a simple lens, assembled in proper relationship on a flat surface to provide a short focal length. The Fresnel lens is used particularly in lighthouses and searchlights to concentrate the light into a relatively narrow beam.

 

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