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Fourth Order Fresnel Lens Caption
French physicist and inventor Augustin Fresnel perfected his new lighthouse lens in the early 1800s. By the 1850s, a lens of this size was shining from the top of the first st. Augustine lighthouse. Each angle and curve is precisely measured to magnify the light out to the horizon. The keepers polished the lens through the night, which kept the light shining as brightly as possible.
Fourth Order Fresnel Lens Caption
French physicist and inventor Augustin Fresnel perfected his new lighthouse lens in the early 1800s. By the 1850s, a lens of this size was shining from the top of the first st. Augustine lighthouse. Each angle and curve is precisely measured to magnify the light out to the horizon. The keepers polished the lens through the night, which kept the light shining as brightly as possible.