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From: fmgst@unix.cis.pitt.edu (Filip M Gieszczykiewicz)
Newsgroups: sci.space.shuttle
Subject: Re: HST mirror distortion
Message-ID: <25524@unix.cis.pitt.edu>
Date: 30 Jun 90 03:30:19 GMT
References: <1062@orange19.qtp.ufl.edu>
Reply-To: fmgst@unix.cis.pitt.edu (Filip Gieszczykiewicz)
Organization: The Last Jedi
Lines: 28


	Greetings. A little note about how to fix the 
	"Hobbled Spaced-out Telescope" :-)

<The NPR report this evening had an interview with a master telescope
<builder of an instrument installed in Chile by a European consortium
<(neither the site nor the group were specifically named).  Apparently
<their mirror suffered similar troubles, but the design included force
<actuators, which they used to tweak the mirror into focus.  Obviously,
 ^^^^^^^^^                     ^^^^^^^^^^^^^^^^
	I read somewhere that they used fish scales (0-10lb). They
	glued hooks to the underside of the mirror and attached
	the scaled between the hooks and the wall under the mirror 
	and that, they said, corrected the imperfection. Interesting!

<HST either doesn't include such hardware, or the abberation is beyond
<the capability of the system.  Can anyone say which?
<
<David Bernholdt			bernhold@qtp.ufl.edu
<Quantum Theory Project		bernhold@ufpine.bitnet
<University of Florida

	Take care and have fun (in that order :-)
-- 
_______________________________________________________________________________
"The Force will be with you, always." It _is_ with me and has been for 10 years
Filip Gieszczykiewicz    "A man without a dream is like a fish without water."
FMGST@PITTVMS  or  fmgst@unix.cis.pitt.edu "My ideas. ALL MINE!!"