Re: [ATM] Figure Stroke 8 inch

[Jim Burrows <burrjaw@earthlink.net>]

At 2004-03-13 11:25 -0800, tomfred@flash.net wrote:

>I am figuring an 8 inch f6 very close to parabola 1/4 wave.
>Here are the numbers moving source if you care to run them.
>
>zone    readding 1      readding 2      readding 3      readding 4
>1       0.000   0.000   0.000   0.000
>...

I had to guess at your zone radii to get the following Sixtests input file:
-----------------------
tomfred
        8
Foucault
        0
y        X
1.21        0
2.43 0.037
3.15   0.053
  3.73 0.067
*
        0       0
    0.006
       48
INCH
------------------------
Sixtests says you have work ahead - surface RMS 289 nm (want 20 nm), 
surface PV 1250 nm.  Anyway, the main number was the best-fit conic b = 
-.480, undercorrected; probably the safest thing is to do one of Texereau's 
parabolizing strokes on p. 97.  One of the "A classic methods" should work 
on an 8"f/6.

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

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