Fresnel lens


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Fres·nel lens

(frā'nel),
a lens with a surface consisting of a concentric series of zones that duplicate the power of a lens or prism but with less thickness.
Synonym(s): lighthouse lens

Fresnel,

Augustin Jean, French physicist, 1788-1827.
Fresnel lens - a lens with a surface consisting of a concentric series of zones that duplicate the power of a lens or prism but with less thickness. Synonym(s): Fresnel prism; lighthouse lens
Fresnel prism - Synonym(s): Fresnel lens
References in periodicals archive ?
He also installed the new Fresnel lens in the lighthouse.
The optical quality acrylic is the most widely applicable material for a concentrator Fresnel lens, and is a good general-purpose material in the visible.
A new request-to-exit sensor from GE Security of Bradenton, Florida, combines Doppler Range Controlled Radar motion sensing and Fresnel lens passive infrared (PIR) technologies.
A hand made French third-order Fresnel lens and timers replaced the oil lamps.
One example is a two-page illustration that is an engineering record of the Block Island, Rhode Island southeast light from 1874, which provides descriptions of the simple Piano-Convex lens, the Buffon lens (circa 1748) and the now popular Fresnel lens, which was developed by Frenchman Augustin-Jean Fresnel in 1821.
Some historians say the Fresnel lens sparked a Union Army invasion of Tampa, but whether that's true or not, the lens was long gone when the soldiers arrived.
The goggles use a stereoscopic Fresnel lens to break down normal sight and create blurred double-vision.
Whereas an ordinary lens must become thicker as it gets larger to accumulate a phase shift of many times 2[pi], a Fresnel lens has a maximum thickness.
A museum on the island houses the original crystal and brass Fresnel lens from the lighthouse.
The ship also has the Improved Fresnel Lens Optical Landing System, IFLOLS.