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Re: [ATM] .707*Radius

At 2004-11-29 18:25 -0500, David  Williams wrote:

>Sorry if is a little off topic, but what is the significance of .707*the 
>measurement of the radius of the circle of the mirror you're 
>making?  Another words (2^.5)/2*the radius.

Its main ATM significance is it's the zone radius of the deviation valley 
of a spherical mirror from the optical best-fit parabola.  Also the peak 
deviation of a conic hyperbola (overcorrected) mirror from the parabola.

         -- Jim Burrows
         -- mailto://burrjaw@earthlink.net
         -- http://home.earthlink.net/~burrjaw
         -- Seattle N47.4723 W122.3662 (WGS84) 

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