[ATM] Recent work on 25 ins lightweight mirror

["Jean-Guy Moreau" <jgmoreau@cablevision.qc.ca>]

Hi,

Just wanted to share some recent results working
on a 25" F/4 mirror, this one hopefully
for my personal use  ;-)

overall view of the plate glass blank here :

http://www.cablevision.qc.ca/astro/25_may04_face.jpg


the mirror on its stand, supported only by the hole in the center
of the backplate :

http://www.cablevision.qc.ca/astro/25_stand.jpg

and the resulting foucault image after 4 hours polishing 
with a 14" lap on my machine,
stroke is lap starting edge to edge with mirror, to overhang
by about 25%, 20 strokes per minutes, table speed 10 rpm :

http://www.cablevision.qc.ca/astro/25ins_fev05_foucault.jpg

hope you enjoy,

Jean-Guy

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