[ATM] Was cellular, now Fused Silica

[William Marriott <bmarriott@pacbell.net>]

Hello;

So, in my search for glass for an 18"-20" mirror
blank, I have come upon an interesting piece of glass.
 It is a 20" diameter piece of fused silica, but, it
is only about 1.5" thick. 

Hopefully since fused silica is stiffer and stronger
than Pyrex, I can use this piece of glass with a
properly designed mirror cell.  I have no experience
using PLOP, and am checking it out, but was wondering
if someone who is very familiar with this program can
take a look at how a 20" x 1.5" fused silica could be
properly supported.

Any help with this would be greatly appreciated

Bill Marriott
VA Optical Lab
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