PORT TOWNSEND — The United States Lighthouse Society will host an event Saturday to celebrate the restoration of Point Wilson’s historic 1879 Fresnel lens. The light from the Fresnel lens is replacing ...

Fresnel lenses, however, don’t require curvature of any kind, but instead utilize concentric flat rings to diffract light, with the rings’ size and width determining the overall lens focal length.

The team has created the world’s thinnest lens, measuring just three atoms thick. Lenses are designed to collect light, bend it and focus it towards a specified point.

Fresnel-zone-plate lens (FZPL) is an application of Huygens-Fresnel's principle. By placing alternate transparent and non-transparent part, waves of opposite phases are reflected on the ...

A new Fresnel lens will be fabricated for the beacon. Window ornaments and ironwork will also be restored.

While most common holographic methods of digital reconstruction are based on the convolution theory, for the ease in the mathematical approach, here we present an algorithm by a discretization of the ...

A lens manufactured in France in 1902 is shining high atop Montauk Point Lighthouse once again. Earlier this month the U.S. Coast Guard relit the clamshell-shaped Fresnel lens, which guided ...

This introduction is based on the scalar formulation of diffraction. It starts by presenting diffraction equations from a general perspective with the Huygens–Fresnel principle to the more simplified ...

A piece of lighthouse history returns to Graves Light in Boston Harbor After a nearly 50-year hiatus, a first-order Fresnel lens is back to illuminate the beacon ...