Re: UNcoated mirror for lunar observing?

From: Chris L Peterson (clp_at_alumni.caltech.edu)
Date: 12/10/04 

Date: Fri, 10 Dec 2004 06:13:07 GMT

On Tue, 7 Dec 2004 21:35:32 -0800, "Doink" <skyman102a@aol.com> wrote:

>The Coulter will need a recoat soon. What about having the coating removed
>and using it for a lunar scope?

I haven't seen this mentioned, but I would think you would take a major contrast
hit from light reflecting and scattering both inside the glass and from
structures behind it. If you used an uncoated mirror, I think you would want to
make sure your cell was flat black, and you would want to polish and AR coat the
back side of the mirror.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com