Figure 8
(a) Image of the footprint of the beam taken with the collimator. A grid with similar dimensions to the collimator has been superimposed onto the image for ease of comparison. (b) Ray-trace image obtained by recording rays that have successfully passed through a collimator with similar dimensions to the one used in (a). Note that the asymmetrical properties of the intensity distribution of the pixels under the collimator holes in the actual data image are reflected in the ray-trace image. |