[ATM] An 8" cellular secondary mirror on its way !

["Robert Houdart" <robert.houdart@cruxis.be>]

After a couple of seemingly quiet months with a lot of work behind the
scenes, the 110 cm (43") Cruxis telescope project is once again visibly
moving forward.
 
Last week the 8" cellular secondary mirror has been cast and it's now on
its way to Mike Lockwood.
The 206x291 mm elliptical flat (8"x11.5") - about the size of a sheet of
letter paper - weighs 1.65 kg (3.65 lbs) or nearly 3 times less than a
conventional, solid diagonal flat of this size. Yet it will be able to
hold its surface with an accuracy of about 1/100 wave RMS or 1/20 wave
Peak-Valley.
 
More information on the web page of the project:
          www.cruxis.com/scope/scope1100.htm
 
or directly on the page of the secondary mirror:
          www.cruxis.com/scope/scope1100_secondarymirror.htm
 
If you're interested in the computational aspects, check out today's new
page about MirrorMesh3D, a program that can generate 3D models of
telescope mirrors for finite element analysis:
          www.cruxis.com/scope/scope1100_mirrormesh3d.htm
The same program is now also being used for the validation of the 1100
mm primary cellular mirror (more about this later).
 
Kind regards, 
Robert Houdart
 
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