Re: [ATM] coring a lens or mirror

[Jim Burrows <burrjaw@earthlink.net>]

At 2005-02-17 18:46 -0800, Bob May wrote:

>I've worked with several mirrors now that had the center drilled out and
>each of them has had problems with the center edge turning down due to the
>inability to press the lap properly and not get the center of the lap high.

I asked Bob Goff (before it was necessary to use a medium <g> - RIP) about 
my cored mirror and he said don't worry about it.  The problems are the 
same as the mirror's edge, but much less impact because the hole's edge is 
probably in the secondary shadow.

         -- Jim Burrows
         -- mailto://burrjaw@earthlink.net
         -- http://home.earthlink.net/~burrjaw
         -- Seattle N47.4723 W122.3662 (WGS84) 

_______________________________________________
ATM mailing list http://www.atmlist.net/