[Radiance-general] trans material

[Miguel Oliveira]

Hi,
 I'm looking for diffuse glass used in translucent pyramidal skylights.

Miguel Oliveira

NaturalWorks   -  Consultants

Lisbon:351213971816/914310067

www.Natural-Works.com

-----Original Message-----
From: Peter Apian-Bennewitz [mailto:apian at pab-opto.de] 
Sent: Tuesday, November 02, 2004 3:42 PM
To: Radiance general discussion
Subject: Re: [Radiance-general] trans material

Miguel Oliveira wrote:

>  
>
>Just a quick one..
>
> 
>
>Dose anyone now the specular transmission and diffuse transmission
parameters of a real glass example.
>
Hi,
Translucent glass comes as structured clear glass, edged, screen 
printed, sandblasted etc. and its forward scattering varies considerably.
Or are you looking for coated glass, which is non-diffuse, but its 
directional transmittance ("transmission"- whatever, with or without 
Fresnel) varies form the rule-of-thumb 10%-reflexion-at-normal-incidence 
too ?

-Peter

-- 
 pab-opto, Freiburg, Germany, http://www.pab-opto.de
 [see web page to check digital email signature]



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