Re: [ATM] steel tubing for mirror cell

["James Lerch" <jlerch1@tampabay.rr.com>]

----- Original Message ----- 
From: "Mark Holm" <mdholm@telerama.com>
To: <atm@atmlist.net>
Sent: Sunday, February 27, 2005 13:04
Subject: [ATM] steel tubing for mirror cell


> 4. Your collimation adjustments can be spaced farther out, even outside the 
> mirror diameter.  This makes collimation adjustment finer and opens several 
> possibilities:
>
> a. Collimation mechanism can be partly beside rather than behind the mirror. 
> This makes for lower profile.
>
> b. Collimation can be done from top.  (Just arrange it so your collimation 
> tool can't hit the mirror.)

Mark,

I agree with all your points, so much in fact, here's a picture showing one of 
the 6 point cell setups on my 16" Bino.

http://lerch.no-ip.com/atm/Stepper_Idea.jpg (59Kb)

I'm currently working on a PIC / Stepper system, so I can do Collimation from 
the eyepiece, as well as possibly use the collimation system as a fine 
moto-focus idea.

After that, while the 6 point setup seems to work, I'm going to try an 18 point 
setup to see if I can tell any difference..

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

"Anything that can happen, will happen" -Stephen Pollock from:
"Particle Physics for Non-Physicists: A Tour of the Microcosmos"

" Press on: nothing in the world can take the place of perseverance.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent. "
                                                           Calvin Coolidge

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