Re: [ATM] lurie-houghton progress

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

Guy, not only do the two spheres need ot be spherical but thay also need to
be the same radius.  I suspect that your 20' ROC curves dont' match each
other os you're getting the rings.  The solution there, of courese, is
obvious and not difficult to do.
The very small ROCs, are easier to polsih spherical more because the forces
keep the lap spherical which reproduces itself on the glass.  That sort of
effect tho doesn't start to really work until you get to really short ROC
curves and 5' isn't naywhere near ther.
I had a guy appear at my class a few times that was considering doing a
Houghton but he was more of a dilentante to the whole thing and nothing ever
went anywhere.  I think that he got scared off by the price of the glass and
the fact that he'd have to actually push glass.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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