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Article #29Re: Re: Telescopes and parabolic mirrors
From: Ali Shaik
Date: Fri, 13 Dec 1985 13:31
Date: Fri, 13 Dec 1985 13:31
27 lines
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> > Keywords:mirror using pressurized sheet
> >
> >
> > ... is a paraboloid to within 6% upto half the radius of the sheet.
> > Thus darkening the area beyond 0.5r looks as if it would give
> > close approximation to a paraboloid. ......
> >
> >
> > ihnp4!philabs!ams
>
> Thank goodness someone's at last found documented evidence to substantiate
> my casual use of the word "parabolic"! Can we now please end this discussion?
> Grant C Blair (unintentional initiator)
>
> Replies to ....{seismo or your link to Europe}!mcvax!ukc!gcb1
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Don't be too sure! The shell stuff I looked up, it was
pointed out, was valid for small deflections, NORMAL
load....
Anybody out there got a good book on membranes?! The
problem seems interesting enough pursure further.
Ali Shaik, ihnp4!philabs!ams
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site philabs.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!whuxl!whuxlm!akgua!gatech!seismo!cmcl2!philabs!ams From: ams@philabs.UUCP (Ali Shaik) Newsgroups: net.research Subject: Re: Re: Telescopes and parabolic mirrors Message-ID: <535@philabs.UUCP> Date: Fri, 13-Dec-85 08:31:24 EST Article-I.D.: philabs.535 Posted: Fri Dec 13 08:31:24 1985 Date-Received: Sun, 15-Dec-85 06:54:49 EST References: <531@philabs.UUCP> <479@ukc.UUCP> Organization: Philips Labs, Briarcliff Manor, NY Lines: 27