[Radiance-general] Angular selectivity of blinds

[Greg Ward]

Hi Richard,

Attached is a .cal file which is distributed with the latest version of 
Radiance, I believe.  It allows you to specify the spacing of a 
grating, and it comes up with a reasonable approximation to the angular 
transmission.

-Greg

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> From: furry at ihug.com.au
> Date: February 15, 2005 9:12:16 PM PST
>
> Does anyone have any suggestions which would be helpful for modelling 
> blinds
> which let different amounts of light through at different angles of 
> incident
> light, an obvious example of this being a Venetian blind.  The 
> particular case
> I am interested in is a woven wire blind where the light incident 
> normal to the
> blind would be transmitted better than at an angle.
>
> At the moment, I am modelling using BRTDfunc with a tranmittance value
> appropriate to the light at normal incidence, however I assume this is 
> no
> different really to modelling glass with the same transmittance value.
>
> Thanks,
> Richard
> Clibborn