Re: [ATM] Test stand astig., edge support

[Michael Peck <mpeck1@ix.netcom.com>]

At 19:54 7/12/05, Dale Eason wrote:


>The second problem is that I don't know the actual
>astig in the mirror.  However it should be small it is

Dale,

The actual primary astigmatism in that mirror is negligible (~.006 waves 
rms) if the Mulherin interferometry I had access to is accurate. I think 
the interferometry on Steve's mirror was considerably better than average 
since Mulherin provided 20 interferograms in two different mirror orientations.

Mike Peck


_________________

Michael Peck
email mpeck1@ix.netcom.com
Wildlife photoblog! http://wildlife-pix.com
Amateur telescope making http://home.earthlink.net/~mlpeck54/astro/astro.html 

_______________________________________________
ATM mailing list http://www.atmlist.net/