This may be a trivial question, but I couldn't figure out a way to do it after a
few searches.

Is it possible to pick off the red, green, and blue components of a light source
and send them different directions.  Something like this:
http://en.wikipedia.org/wiki/Three-CCD_camera

I can definitely see how you can reflect just one color at an interface, but not
how you can reflect one component while the others pass through unaffected
except for total light intensity.

Thanks in advance!

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> This may be a trivial question, but I couldn't figure out a way to do it after a
> few searches.
>
> Is it possible to pick off the red, green, and blue components of a light source
> and send them different directions.  Something like this:
> http://en.wikipedia.org/wiki/Three-CCD_camera
>
> I can definitely see how you can reflect just one color at an interface, but not
> how you can reflect one component while the others pass through unaffected
> except for total light intensity.
>
> Thanks in advance!
>
>

Prety easy. Take a look at the optics.pov smple scene.

The principle is to have a mirror that reflact a single colour or two 
and transmit the part that is not reflected.

This is taken verbatim from the mentioned scene:
#declare RedMirrorTex =
texture {
     pigment {color rgb < 0, 1, 1> filter 1}
     finish {ambient 0 diffuse 0 reflection Red}
}

The pigment let pass the blue and green, while the reflection part 
reflect the red part.


Alain

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Le 09/07/2010 19:21, AlexLens nous fit lire :
> This may be a trivial question, but I couldn't figure out a way to do it after a
> few searches.
> 
> Is it possible to pick off the red, green, and blue components of a light source
> and send them different directions.  Something like this:
> http://en.wikipedia.org/wiki/Three-CCD_camera
> 
> I can definitely see how you can reflect just one color at an interface, but not
> how you can reflect one component while the others pass through unaffected
> except for total light intensity.
> 

The model/computation in povray currently, as far as i know, does not
support the needed math from scratch.
So far, the ray is computed independently of the spectrum.
(the experiment on the wiki is using total internal reflection and
dichroic... we have total internal reflection, but for full ray, not for
a single frequency. Dichroic is a full other story by itself)

But have a look at optics.pov, from usual distribution: scenes/advanced
Adding some filtering mirrors (it's cheating) might solve the issue.

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