Date: Wed Dec 19 16:02:42 2007

Author: Urs Lauterburg

Subject: Re: Demonstration of optical resolution ?

Wolf and Jerry,

Thanks a lot to you for expanding my personal resolution with your
pointers and infos.



Urs Lauterburg
Physics demonstrator
Physikalisches Institut
University of Bern

>Urs -- have a look at my paper "How to beat the Rayleigh resolution
>limit: A lecture demonstration," Am J Phys 70(6), 587-594 (2002).
>It begins with a demonstration of the Rayleigh limit using a
>telescope. As a second suggestion, observing 1 micron latex spheres
>under a microscope are impossible to resolve, even under the highest
>magnification (1000) -- as you try and focus on them, you just get
>circular spots with diffraction patterns around them. If you place
>a piece of aluminum foil with a pinhole in it in front of the
>objective lens, the diffraction patterns get worse and you can't
>even resolve two spheres next to each other. -- Wolfgang