Hello


inclinations on a compound parabolic concentrators
http://www.powerfromthesun.net/Book/chapter09/chapter09_files/image011.jpg
Where I attempt to render a light intensity map of point light source, after
placing a disc (act as a screen) under the reflector opening, I get some
convincing caustics;

however the my main aim is to test this concentrating collector model in
semi-real environment. ie.sun light with sun path modelling the sun movement in
the sky to be modelled from the elevation angle and the azimuth calculated
values, from sunrise to sunset, for the corresponding latitude and longitude of
the place where the collector will be  located.  And this is what
sun_postion.ini exactly does.

With the included POV script 'CPC_sun-2.pov' I set the collector and disc on the
'land' and I placed an orthographic camera quite far away from the receiver and
used high magnification to zoom in and render the image showing light
distribution.

it does not show any reflection on the disc (not collecting any light) and here
lies the problem.

Having tilted the reflected southward ,I get too much light distributed on the
collector and being all equally brightened!?


that there is a problem with the light source maybe?

See the links below for all files
http://ia600706.us.archive.org/30/items/reflector/sun_position.inc
http://ia600706.us.archive.org/30/items/reflector/CPC_sun-2.pov
http://ia600706.us.archive.org/30/items/reflector/CPC.inc
http://ia600706.us.archive.org/30/items/reflector/CPC_SUN-2.INI

image show the result i got when testing the collector with sun_position.inc

http://img89.imageshack.us/img89/6383/cpcsun253.png

testing the collector with point light source

http://img713.imageshack.us/img713/6086/pointlight.png

http://ia600702.us.archive.org/4/items/refion/CPC-1-1-1.pov






thanks
Zak

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