Lighthouse “Fresnel” Lens
The whole Fresnel lens complete with iridescence.
Detailed view of the Fresnel lens (pronounce “FrAYneLLE”), named after Augustin Fresnel (strangely re-baptised on the English version of Wikipedia), who is said to have invented the first lighthouse lens in 1823, 190 years ago to the day. National maritime museum, Paris, 2013.
4 Comments
Helps for landing on an aircraft carrier too.
Thanks Jason, you are right. I didn’t know that (http://en.wikipedia.org/wiki/Optical_landing_system) thanks for your comment and visit and like.
Beautiful images. I love lighthouses and I was drawn to your post.
Thank you so much for stopping by and commenting. Most appreciated.