Re: TMB Quartz Diagonals
- --- In firstname.lastname@example.org, "rwiederrich" <rwiederrich@...>
> > 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?)
- TMB collimatable quartz diagonal?
--- In email@example.com, "tmboptical" <TMBoptical@...>
> --- In firstname.lastname@example.org, "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
> > R/S,
> > Dan
> Hi Dan,
> I now have you on my list for one TMB collimatable quartz diagonal.
> Thank you.
> Thomas Back