[Radiance-general] Description of complex glass systems (geometry+ material)

[Greg Ward]

Hi Marina,

I think you had best treat this as a two-glazing system, and use  
glaze2.cal similar to how you suggested in your previous e-mail.   
You'll need to measure the transmittance and front/back reflectances  
of each piece of glazing (laminated and float), and provide these as  
the inputs to your BRTDfunc model.  You could even use the glazing  
script as is if your float glass is close enough to a standard clear  
glazing by providing your own definition of the other glass as input  
a la:

	http://www.radiance-online.org/pipermail/radiance-general/2009- 
January/005665.html

I hope this helps.
-Greg

> From: marina aviles olmos <marina.aviles at gmail.com>
> Date: May 5, 2009 11:02:00 AM PDT
>
> Hi Greg,
>
> first of all, there is a mistake in my previous mail. I wanted to say
> < and I cannot get its description from Optics5.>
>
> It is the latter case:
> outside the laminate (glass pane + optical adhesive coating +... +
> interlayer + ... + adhesive coating + glass) then the air gap and the
> inside that is a float glass.
> (It is a switchable glass in a double glazing)
>
> How can I then describe this glasses?
>
> (I have the possibility to measure the double glazing or the different
> layers separately)
> Just a naive idea that could helps:
>
> If the combined R and T are the ones resulting from the hole double
> glazing which could be measured in the spectrometer if I measure the
> complete double glass and not the separated layers:
>
> Total Reflectance front
> Total Reflectance back
> Total Transmitance
>
> Could be with this data a way to describe them?
>
> Marina