Evidence that Sheena's new blog wont keep her from writing science stories for the Trib: New space telescope: Utah to help astronomers see beginning of universe http://www.sltrib.com/News/ci_11305522 patrick
Have any of our optics "pros" on the list ground or figured a beryllium mirror? Steve? Jerry? John? I'm intrigued. On Thu, Dec 25, 2008 at 6:33 PM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Evidence that Sheena's new blog wont keep her from writing science stories for the Trib:
New space telescope: Utah to help astronomers see beginning of universe http://www.sltrib.com/News/ci_11305522
On 26 Dec 2008, at 18:27 , Chuck Hards wrote:
Have any of our optics "pros" on the list ground or figured a beryllium mirror? Steve? Jerry? John? I'm intrigued.
I heard from former SLASer Roger Ockey (he works at ATK) that the stuff is a pain to work with in that the fumes generated when the material is being worked are toxic. patrick p.s. Why Jerry and Cindy live where they do: Here http://www.cleardarksky.com/c/SaltLakeUTkey.html?1 There http://www.cleardarksky.com/c/Vr10E6ObUTkey.html
http://www.osha.gov/SLTC/beryllium/recognition.html Quoting Patrick Wiggins <paw@wirelessbeehive.com>:
On 26 Dec 2008, at 18:27 , Chuck Hards wrote:
Have any of our optics "pros" on the list ground or figured a beryllium mirror? Steve? Jerry? John? I'm intrigued.
I heard from former SLASer Roger Ockey (he works at ATK) that the stuff is a pain to work with in that the fumes generated when the material is being worked are toxic.
patrick
p.s. Why Jerry and Cindy live where they do:
Here http://www.cleardarksky.com/c/SaltLakeUTkey.html?1
There http://www.cleardarksky.com/c/Vr10E6ObUTkey.html
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You're always looking on the bright side, Guy! On Fri, Dec 26, 2008 at 7:47 PM, <diveboss@xmission.com> wrote:
I've worked with the stuff. Quoting Chuck Hards <chuck.hards@gmail.com>:
You're always looking on the bright side, Guy!
On Fri, Dec 26, 2008 at 7:47 PM, <diveboss@xmission.com> wrote:
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com
I doubt it would generate fumes if being ground slowly and wet, using conventional mirror-grinding tequniques. I'm sure Roger was referring to standard machining practices. I'm also going to suggest that beryllium is OK for a telescope mirror that is used at extremely low temperatures (like outer space!) but would be thermally unstable, like most metal mirrors, at temperatures close to the "civilized" range. On Fri, Dec 26, 2008 at 6:36 PM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
On 26 Dec 2008, at 18:27 , Chuck Hards wrote:
Have any of our optics "pros" on the list ground or figured a beryllium mirror? Steve? Jerry? John? I'm intrigued.
I heard from former SLASer Roger Ockey (he works at ATK) that the stuff is a pain to work with in that the fumes generated when the material is being worked are toxic.
participants (3)
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Chuck Hards -
diveboss＠xmission.com -
Patrick Wiggins