RE: [ATM] 16" Mirror Blank

["Dennis Woos" <dpwoos@gmavt.net>]

>DW> I have a fine annealed Pyrex mirror blank originally from United Lens,
>DW> 15.875" diameter, 2.875" thick, blanchard ground both sides and around
the
>DW> edge.  I am seriously considering having GlassFab in Rochester, NY
slice it
>DW> into two thinner blanks (cost $300).

>I'm not sure what you are gaining (other than less thermal
mass), as the cost of cutting in half is about the same as the
cost of a blank.

Since buying this blank on Astromart ($500), I have come to believe that the
thickness/mass is a problem.  I could try and sell it (good for an optical
flat?) and get a thinner one.  However, it may be easier to have it sliced
and sell half of it to pay for the work.  Supposedly it is a very
high-quality piece of glass.

Dennis

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