Re: [ATM] Box Beam Mirror Blank

["Bob May" <bobmay@nethere.com>]

Richard Schwartz (on this list) is making mirror blanks with just
a large kiln, slumping the faceplate and then cooling and adding
in the spacers in a triangular pattern and then putting the back
on top and then rewarming evrerything to fuse the glass together.
There's another guy (don't remember his name at the moment) that
is doing square pins between with the same method.  Either method
appears to work well and produce a lightweight mirror.
I've done one Richard mirror for him successfully and have
several more that are on the back burner as they are rather long
focal length for a Cass so they will end up being Newt type
mirrors.
Gluing things together is a sure road to failure as the glue will
eventually fail and you are then stuck with a failed mirror.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
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