Re: Kilian's Mirror: Polishing...
Bob Luffel (bobl@gr.hp.com)
Wed, 29 Mar 95 10:37:05 MST
>
>
> C > On that note, I heard that 1 out of ten scopes started actually gets
> C > finished.
> C >
> C > Any comments?
> C
> C I think you are overly pessimistic...the correct figure
> C must be AT LEAST 12%...maybe even 15... :-)
> C
> C Jaakko Oksa
> C
>
> It can't be that bad ... The market would be flooded with second
> hand blanks !
> Anyone with an unfinished 10-12 inch Zerodur blank out there ? ...
>
> Bratislav
>
>
Well, since I just completed my 10" Sitall mirror last night, add one
more into the 12% bucket....(I still have to put it into the tube,
definitely the easiest part of this project). Sorry Bratislav, you
can't have my blank!! I did see a 9" sitall blank for sale in
the Starry Messenger for $225 (a reasonable price).
When I get the time, I will summarize my experiences grinding/polishing
sitall.
Bob