Re: [ATM] Flat grinding the back of the primary mirror

["Jeff Baldwin" <bald@centurytel.net>]

I'm with Vladimir on this.  If you grind the back flat, then you would have 
had to at least fine grind on the front again, then polish.  Grinding the 
back flat and then retouching the front by polishing wouldn't make a 
physical warp this size go away.
JBald

Jeff and Glenda Baldwin
Beaver WA
http://home.centurytel.net/bald

>
> So you made a finished mirror, found it astigmatic and then:
>
>> After grinding the
>>back flat and polishing for a while the astig disappeared.
>


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