Very interesting Mike, I wonder if you could stack a lens like that in front of
a normal camera lens (much like a screw in filter) to achieve the extended DOF?
...Wayne
> -----Original Message-----
> From: olympus <olympus-
> bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx> On
> Behalf Of usher99--- via olympus
> Sent: Saturday, 17 February 2024 9:38 AM
> To: OM list <olympus@xxxxxxxxxxxxxxxxx>
> Cc: usher99@xxxxxxx
> Subject: [OM] Spiral optics
>
>
> Someone in Bordeaux is thinking outside the box (something I tell our cat
> Othello never to do). They used optical vortices to extend the depth of
> field. I attached the paper as well. This would have implications for
> contact
> lenses rather quickly and much more slowly for IOL's for cataract
> replacements. I suspect spiral optics will be much better than diffractive
> optics for IOL's with fewer dysphotopsias and no problem with pupil
> sizes. How the spiral lenses will compare to lenses using aberrations to
> extend dof is not clear.The no free lunch rule of optics dictates that
> contrast
> sensitivity at some spatial frequencies must suffer as one is still spreading
> finite photons over various focal distances. Truly accommodating IOL's will
> still be superior in that respect. http://tinyurl.com/2s4csjdj
>
>
> https://opg.optica.org/optica/fulltext.cfm?uri=optica-11-2-238&id=546413
>
> Seeing clearly, Mike
>
>
> --
> __________________________________________________________
> _______
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|