Re: ATM resurface 10"

[Bill Marriott <btk@pacbell.net>]

Abaknon@aol.com wrote:
> 
> Hi,
> 
> I just acquired an old 10" F4 JPL surplus mirror. The surface has a few minor
> scratches and the coating has oxidized. What would you suggest to make
> this back into a usable mirror?
> 
> Thanks,
> 
> Paulo Castillo

Paulo;

1) Do you know if the mirror is a parabola, or
spherical?
   That should be determined if you want to use it
for astronomical    purposes

2) If it does have a good figure, the scratches
are there to stay,    (unless they are VERY fine
and in the coating only)

3) To remove the coating, my fave is a Ferric
Chloride solution for an    overnite soak.

4) If it needs to be refigured, the list can help
with that too...

5) Then there is the building of the
telescope.....

Bill Marriott
Woodacre, Ca. USA
btk@pacbell.net

http://www.starlightoptical.com
Telescope/Optical stuff