Re: ATM Foucault with LED

[Leftfieldstar@aol.com]

In a message dated 12/6/01 6:49:35 PM Eastern Standard Time, 
jlerch1@tampabay.rr.com writes:

<< Unfortunately the diffraction is just as bad with a video camera as with 
the Eyeball , Fortunately with the Video Camera they stay put, unlike the 
eyeball :) >>

 The diffraction effects may actually be "speckle" which is a fringing effect 
and is an artifact that originates exclusively from within the laser. I 
wonder if the motion of this fringing that seems apparent thru your eyeball 
is caused by the minute involuntary movement of your eye, whereas the camera 
is stationary.
 Melles Griot makes a device called a "Speckle Eater"( hi-tech term!). It 
consists of a rotating, motor-driven, fine matte white disk that you train a 
laser on and the speckle is "homogenized". Very effectively, too.

Cool stuff,
Dominic DiLeo