Just a thought. I have not heard this discussed before here or maybe I just
missed it. I know that you guys want just the purest optics possible so this
idea may make you gag but I work at Cape Canaveral and they have
some pretty impressive optics there. I believe that some of their solutions to
the corrosion are to mount a flat glass over the opening and understanding that
the rest of the tube is sealed flood the chamber with nitrogen or some other
inert cheap gas. Is that a workable solution for you?
Russell
