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Sam Wormley wrote:
Sunlight Speckle
Lasers are not the only light sources that can
produce a speckle pattern on a rough surface.
http://www.sciencenews.org/articles/20040918/mathtrek.asp
That article is a good example illustrating (!) the difference between
*temporal* coherence and *spatial* coherence. Thanks!
There was an "After Image" picture published in OPN, the member journal
of the Optical Society of America a couple of years ago, showing
sunlight speckle off a (U.S.) nickle. Using a spectral filter helped to
increase the contrast.
--
Andrew Resnick, Ph.D.
Department of Physiology and Biophysics
CWRU School of Medicine
tanspose 'op' for mail
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