On 6/5/12 9:14 AM, Chris Albertson wrote:
On Mon, Jun 4, 2012 at 11:26 PM,<li...@lazygranch.com> wrote:
The low-E coatings are known to attenuate WIFI. WIFI is probably a worse
case than GPS, but the availability of the gear makes experimenting easy. I
think they are sputtered metal either on the glass or on a thin film
applied to the glass. Southwall Technology in Palo Alto pioneered or at
least commercialized the technology.
They are interference filters. Layered coating 1/4 wavelength thick that
send some waves back in phase and other out of phase, they reflect heat and
UV be let light go through. I think it is a tin oxide coating of some
kind.
or Indium Tin Oxide (ITO) which is transparent and conductive.
Sometime they use silver but only on the inside of a double pane window
with the inside filled with inert gas, otherwise the silver tarnishes.
OK, I think they can also over coat the silver with an oxide to keep the
air away from it
yes.. the german young lady was working with triple pane windows filled
with Argon
I think my windows at home have both. I can see the 1/4 wave coating
change color with the angle I look at the glass, the silver simply darkens
the glass. The argon gas between the panes is for insulation.
I assume it is the metallic silver coat the messes with RF signals. I
think the silver is very common in large buildings. But with a large
building they make the glass custom to the architect's specifications so no
one can know what is in your building.
Chris Albertson
Redondo Beach, California
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