Re: [ATM] Silvering Mirrors

[Jarvis Krumbein <jkoptic@juno.com>]

 Dominic, before the aluminizing process was discovered, partial silver
coats were used as beam splitters.  The process was fairly easy to
control as to transmission percentage much the same way that it's done
with aluminum.  See "Proceedures in Experimental Physics" by John Strong.
 The Rochelle Salt Process was generally used since it was a slower
process and easier to control.  Pages 157 & 158 describe the necessary
steps.

Jarvis Krumbein

On Mon, 28 Jan 2008 09:16:28 +0100 (MET) Dominic-Luc Webb
<dlwebb@canit.se> writes:
> 
> Interesting! I guess the bronze hue might be problematic for
> photometric measurements or for observing objects with colored
> patterns of similar color, etc. As an afterthought, I wonder
> if you can get silvering that is partially, like 50%, reflective
> so you end up with a beamsplitter? That could be kind of cute in
> an optical tester, or maybe just to split an image between two
> detectors. Beamsplitters are generally rather expensive. I can
> imagine a few applications where this bronze hue would not
> matter.
> 
> Dominic
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