interreflection

We can model the interreflections such that if our model agrees with the experiment, we can expect our model of the immersion coefficient to be correct for the MOBY radiance collector.

The water and glass layers, because they are thin, can have interreflections inside these layers.

Similar to the water layer, the glass layer will transmit light with interreflections inside this layer.

Interreflections may be possible between the back of the window and the mirror-lens-fber system, but since the lens is coated with an antireflectance layer, is significantly behind the glass, and is curved (and given the angular acceptance of the system), it is unlikely that these reflections will be significant, and thus they are ignored.

If we include in the transmittance term the interreflections of the light in the window, and we also include the index of refraction of air ([n.sub.a]), Eq.

(1) when all of the interreflections in the quartz window are included.

Klems showed that with a few simplifying assumptions, it is possible to derive the overall system transmittance matrix of a set of layers, including all the effects of multiple interreflections between layers, from the optical properties of individual layers [Klems 1994a, 1994b].

While the calculation of luminance distributions for CFS characterized with BSDF data is fairly efficient using mkillum, it still takes some time to sample the exterior environment, account for interreflections and so on, then considerably longer to render a final image using the computed secondary light sources.

We assume then that these lighting calculations, and in particular interreflections between colored surfaces, can be accurately calculated using three separate color bands.

Implicit in this representation is the assumption that interreflections between colored surfaces can be accurately calculated using three separate color bands.