[Radiance-general] RE: Light pipe

[Martin Moeck]

Anthony, the results were never published. I was a grad. student back then and this was an independent study. It is a hollow prismatic standard lightpipe. I have a cylindrical lightpipe here and believe the results should be quite similar.
 
Martin
 
 
-----Original Message----- 
From: radiance-general-bounces at radiance-online.org on behalf of Anthony J. Farrell 
Sent: Fri 6/3/2005 6:28 AM 
To: radiance-general at radiance-online.org 
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Subject: *** SPAM *** [Radiance-general] RE: Light pipe



	Thanks Marin for the photos and data from your experiments, this is most
	interesting; I am carrying out experiments on hollow mirror lightpipes, I
	note yours was a square duct.
	
	I measured the intensity distribution of one emitting patch of a lightpipe
	in 1988. The pipe used the 3M film, but had a square cross section and
	glowing sides.
	
	Is it a solid light pipe or hollow, is it prismatic standard transparent?
	
	See the intensity distribution and the luminance distribution along the full
	lightpipe length at
	
	www.personal.psu.edu/mum13/lightpipe
	
	These are interesting results. Have you published (Thesis, conference,
	papers?)
	
	The intensity distribution was measured approximately at the center of the
	length of the pipe.
	
	Thanks again for this interesting overview of your work.
	
	
	the simplest way to proceed is to create an equation that links a coordinate
	to the radiance of the surface in form of a multiplier (hence the equation
	is between [0,1]).
	you may use a cal file or directly express it into the brightfunc
	definition.
	
	
	Guilio, thanks for the example, I'll try implement it for my cylindrical
	light pipe.
	
	Regards,
	
	Anthony
	
	
	
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