Mystic Seaport, Mystic, CT
The Fresnel Lens was invented by the Frenchman Augustine Fresnel in 1822. Using curved panes of glass, the lens was able to concentrate the light from a single source and project that light much farther than a simple pane of glass. The lenses came in various sizes, designated as "orders" with a "1st Order" being the largest down to a "7th Order". This particular Fresnel Lens is a "4th Order" lens weighing between 400 and 600 lbs. It is capable of projecting a beam of light 15 miles.
Fine fresnel lens photo. I've always been intrigued by these lenses.
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