Date: Wed Dec 19 14:00:57 2007

Author: Wolfgang Rueckner

Subject: Re: Demonstration of optical resolution ?

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

On Dec 19, 2007, at 12:55 PM, Urs Lauterburg wrote:

> Dear Tap-lers,
> Does anyone of you Taplers do an interesting and instructive demo
> on the theme of optical resolution. Nothing really exiting comes to
> my mind about this but maybe someone else has done or knows
> something. Any shared wisdom is much appreciated. Thanks a lot
> and regards
> Urs Lauterburg
> Physics demonstrator
> Physikalisches Institut
> University of Bern
> Switzerland