[ATM] (no subject)

[gilgagne at bellsouth.net (Gil Gagne)]

Buck wrote:
 >I've decided to finish figuring a full thickness 12.5" f6 that has 
been >hiding in my basement for several of years.  It's polished and 
 >spherical except for a small central hole.  I don't have the original 
 >tool/lap.  I'm thinking I've got these options:

 > 3) New lap on a 8" glass tool (near full thickness).   Pros: Cleanest 
 >solution.  Fairly quick.  Cons: Sounds smallish for figuring a 12.5".

Buck,
I lost the full size lap I used for polishing my 12.25" mirror so I made 
an 8" pitch lap for figuring and it worked wonderfully. I managed to get 
Strehl ratio 0.957 using both Sixtests and Figure45 for Foucault data 
analysis. So I'd recommend to go with option # 3.
Gil
Port Orange, FL