ATM Wire test

["Tom Krajci" <tkrajci@san.osd.mil>]

>From: "Bawden,Michael" <Michael.Bawden@spr.gases.boc.com>

>This test has suddenly come to the fore , are there any examples of the
=
>test around i.e.. screen shots or explanations of what to look for? I =
>believe a pin stick is the preferred method of alignment how do you =
>determine the position of the pins. Any info would be of great help.

This helps visualize the shadow behavior that you see (instead of the
typical knife edge shadows)
http://wyant.optics.arizona.edu/WireSeidel/WireSeidel.htm

Some folks make the pin locations the middle of the couder screen inner
and outer radii for a given zone.  I always used Tex software to
generate the dimensions of a given couder screen, and then calculated
the middle of each zone for my pin stick placement.  

One nice thing is that you can easily make/test more zones with the wire
test than you can with a typical couder mask.  Will that get you more
accuracy?  I can't say.

Tom Krajci
Tashkent, Uzbekistan


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