Representation of the stray light pattern produced by both the parabola and the hyperbola with a ray-tracing routine considering N = 10⁵ light rays for each shell. From this image, it is clear that the pattern features some important characteristics. It is easy to distinguish the impact of the reflections on the parabola and the hyperbola. Singly reflected rays by the parabola (red dots) generate a pattern, which does not intersect the area of the detector. Therefore, this pattern is not included in our analysis. Rays reflected by the hyperbola hit the detector, creating an arched pattern.