Posted by Ed Tavernier on Thursday, January 30, 2003 at 11:15PM :
In Reply to: Amber fresnel lens blinker light wanted posted by CnR on Thursday, January 30, 2003 at 9:27PM :
CnR,
Interesting side note in that the fresnel lens is made of parabolic prisms that intensify the visible wavelengths and concentrate the light into a beam. These lenses usually 2-6 feet high were mounted on a rotating base and circled a constant light source giving the circling beam found in many lighthouses.
Eddie
(I grew up in Montauk, NY, and have a lifelong love of the sea and lighthouses)