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The first such lenses were invented by the French scientist Augustin-Jean Fresnel in 1819 to provide lightweight lenses for lighthouses.

Before the 11 a.m. boat ride back to the mainland, Dre Elmore likes to show off the retired Fresnel lens and the array of still-working machinery in the fog signal building.

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Before the 11 a.m. boat ride back to the mainland, Dre Elmore likes to show off the retired Fresnel lens and the array of still-working machinery in the fog signal building.

The glint in Gallichotte’s eyes reflects the setting sun as he becomes more animated in the telling of their 2018 mailbox creation story: the purchase of reference books, hours of careful research, the need for authenticity, the acquisition of a Fresnel lens.