Fresnel lighthouse lens

repete

Hello all,

Anyone know of any blueprints or some decent pics from a fresnel lighthouse lens at different angles.

From what I have found it looks like I am going to be tested big time in the modelling department:




Cheers

Pete

(PS peanut™, now you know:))

Noors

Yeah i might have some ref at work of Cordouan lighthouse fresnel lens. Will post tomorrow.
Basically those are triangular prisms, it's not really complex modeling wise.

repete

yeah the more I look at that pic the more logical it seems. The centre parts look simple enough it also looks like a symmetrical cylinder (to me anyway) so it might not be that difficult.

Anyway cheers for anything you can dig up :poly121:

Noors

Cordouan's lanterns weren't egg shaped (first lighthouse with a fresnel lens, for the historical fact) so pics won't help you much.
But it's kinda always the same structure, the middle part is monobloc, then it's prismatic rings.
Good luck !
https://www.flickr.com/search/?text=fresnel%20lens
https://fr.wikipedia.org/wiki/Phare#/media/File:Fresnel_lens_loschen_hg.jpg
http://www.fori.us/img/replicalens/Pottawatomie_Replica_Lens.jpg

You can spot the metal structure there, where glass parts are missing

repete

Thanks noors :thumbup:

This helps a lot.

Cheers