From: "Tom Krajci" 
To: 
Reply-To: "Tom Krajci" 


>From: "Bawden,Michael" 

>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


-+-
Outgoing mail is certified Virus Free. Checked by AVG anti-virus system
(http://www.grisoft.com). Version: 6.0.419 / Virus Database: 235 - Release
Date: 11/13/2002

--- BBBS/NT v4.00 MP