SBAU Telescope Workshop, January, 15, 2013
attendees: tim c,
jerry w, tom t
-12.5” Cave mirror in cast cell brought in by Tim C.,
looking to make tube for it
Cave Optical Co. #M737961
F6, 75 1/8” F.L.
January 5, 1973
-discuss aspect ratio for tom t. 6:1, thickness of glass to diameter of
mirror.
Jerry talked about glass sag at thinner glass ratio (10:1)
-Book (and Sky&Telescope article) by Albert Highe
“Engineering, Design, and Construction of Portable Newtonian
Telescopes”
-advantage of laminated vaulted birch wood: better for lower coefficient of expansion
than aluminum
photos taken at meeting:
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