Tom Roberts wrote:
I think you have not understood the mechanism explained in the article.
In every deflection angle we observe different parallel color beams due
to the dispersion of different beams of the star. These parallel color
beams make up a white deflected beam.

Then your "mechanism" is just plain wrong -- the beams of different
colors are not parallel BECAUSE THERE IS DISPERSION PRESENT. But your
summary here does not correspond to what you wrote in the article.

Fig. 6 of the article shows beams of different colors parallel to
each other.