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Re: [ATM] Diffraction Assisted Figure Test

Hello Jim,

It would be interesting to have 'diffract' extended with the option to
define your own mask, and then see what the pinhole image looks like...

   Arjan

> The caveat is to work with diffraction you have to use the Fourier
> transform.  I've got a couple of "Hartmann" test reduction programs, 1D:
>          http://home.earthlink.net/~burrjaw/public/hart.zip
> (Win32, 2001-12-31, 508 k)
> and 2D:
>          http://home.earthlink.net/~burrjaw/public/hart2d.zip
> (Win32, 2006-02-02, 1.14 M)
>
> Both programs use the image from a web cam with the lens taken off,
> and the 2D version uses, as Arjan suggests, a "checkerboard"
> mask.  I've been using (too long <grumble>) a version of the 2D
> program to figure an RC cass secondary using a Hindle sphere.

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