Hi all,

Wondering if I could get some pointers to modelling optical components,
specially LEDs. My 'Real World' problem is designing RGB LED clusters and I
thought PovRay or MegaPOV could help. Have been having a bit of fun over at
candlepower forums....try searching for posts from rgbphil.

I'd like to model:

the lens on an LED :- need some help preferably some tools on getting
geometry of lenses right.....some LEDs have more than just two intersecting
spheres type lenses.

LED die :- I've tried modelling a small squashed cube and using an area
light the same size. The area is made to look_like the cube....didn't work.
I got a reasonable result just turning shadows off.....not sure whats
wrong. However the issue is that the physical size of the LED die is
important because the lens can sometimes image the die in the projected
beam. This has to be taken into account in the modelling so any help in
getting a nice glowing box object that truely emits light from all surfaces
would help.

Diffusers :- I've tried POVRAY 3.6 and having an interior with various
scattering parameters....but can't get close to what happens when light
hits a real world piece of opaque plastic......any help in this in
particular would be much appreciated. If I can get this right, I can
simplify my LED models.

You can be reasonably technical in any replys, I used to play with good old
DKBTrace all the time.....though I'm a bit rusty on the later releases.

thanks
phil

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