Fresnel

A Fresnel or catadioptric lens reflects and refracts the light into a narrow beam

Modern lenses are much smaller and lighter (although far less aesthetic) than Augustin-Jean Fresnel's original mulit-element design. The above lens is one of 4 that produce the characteristic flash sequence for the Nash Point Lighthouse.

 

Technical information

Light: 1500W lamp

Lens: 1st order 920 mm catadioptric fixed lens

Intensity: 140,000 Candela

Range Of Light: 21 nautical miles

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