From: "Bob May" 
To: "atmlist" 
Reply-To: "Bob May" 


You might want to check out the refractive specs for some of the clear
plastics.  I haven't checked but I'd suspect that they'd be way off from
the glass line which is a good thing.  The problem will be getting the
large piece needed that is absolutely homogenous like the glass stuff is. 
Then the next problem will be getting the finish that you can get with
glass. I'll also note that Cargill has some liquids that are suitable for
use as optical lens work.  They do have some interesting properties in the
refractive index area.  You might consider a true contact triplet or more
with liquid as one of the surfaces. Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net

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