From: "James Lerch" 
To: "ATM List" 
Cc: 
Reply-To: "James Lerch" 


Greetings all,

I was just running some 'What Ifs' thru my mind.

One of these thoughts were along the lines of trying to calculate how much
my platform would have to be misaligned to get the Robo to match the Couder
mask total knife edge travel results.

Given:
Couder Mask KE travel from z1 to z7 = 0.143" Robo-Foucault KE travel
from z1 to z7 = 0.133"

Then Cos(A) = 0.133/0.143   A=21.55 degrees

If the Couder Mask result is correct, then Robo would have to be misaligned
(with respect to the optical axis) by nearly 21.5 degrees?  If this is
right, I'm pretty sure I'd have noticed that! ;)

Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction,testing, and coating site)

--- BBBS/NT v4.01 Flag-4