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Re: TMB Quartz Diagonals

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  • tmboptical
    ... Thanks Rob. Thomas Back
    Message 1 of 34 , Apr 1, 2006
      --- In tmboptical@yahoogroups.com, "rwiederrich" <rwiederrich@...>
      wrote:
      >
      > >
      > > It is very simple really. Quartz is the best substrate for a
      > > diagonal mirror, period. It takes a better polish, has a very
      > > low thermal coefficient of expansion, and the wavefront is better
      > > for two reasons. One, it polishes better, and two, it is a very
      > > hard (and in our case very thick) material, and the dielectric
      > > coatings do stress a mirror, but our thick quartz mirrors are
      > > very resistant to this coating stress.
      > >
      > > Disadvantages? I can't think of any.
      > >
      > > Thomas Back
      > >
      >
      >
      > Thomas, the only *disadvantage* that comes to mind is how it puts a
      > shadow on the competitions lesser quality product.
      >
      > Rob(can I say that on national TV?)

      Thanks Rob.

      Thomas Back
    • justinweigle
      TMB collimatable quartz diagonal? ... is
      Message 34 of 34 , Mar 27, 2007
        TMB collimatable quartz diagonal?



        --- In tmboptical@yahoogroups.com, "tmboptical" <TMBoptical@...>
        wrote:
        >
        > --- In tmboptical@yahoogroups.com, "Danny Halstead"
        > <dannyhalstead44@> wrote:
        > >
        > > Thomas,
        > > Please put my name down for one of your TMB collimatable quartz
        > diagonals. Full name is Danny D Halstead primary ISP e-mail address
        is
        > ddh@
        > > R/S,
        > > Dan
        >
        > Hi Dan,
        >
        > I now have you on my list for one TMB collimatable quartz diagonal.
        > Thank you.
        >
        > Thomas Back
        >
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