Re: ATM Laser Collimation /Focuser Question

["Al Klayton" <aklayton@pcisys.net>]

----- Original Message -----
From: Steele, Kirk A <SteeleKA@nafm.misawa.af.mil>
To: 'Al Klayton' <aklayton@pcisys.net>
Sent: Sunday, December 05, 1999 3:35 PM
Subject: RE: ATM Laser Collimation /Focuser Question


> this will be the second attempt at posting this response.
>   ..snip...

Kirk,
The laser collimator was collimated over a distance of about 60 feet (using
a V block and a plane mirror at 30 feet to reflect the beam back to where I
could see it!) In any case,  I am aware of the type of inherent errors that
could still exist, and also some of the pitfalls of laser collimation. The
key point of my post was to get help explaining the observed BACK & FORTH
movement of the laser beam on the primary mirror as the focuser was moved in
a SINGLE direction. As Nils Olof pointed out, it seems to be a more of a
focuser issue then a laser collimator issue. Again, as Nils Olof asked, is
this to be expected in focusers such as the JMI?

Thanks to all who have responded on this topic,
Al