A curved line-scatterer formed from a segment of a circle can act as a convex or concave spherical mirror, producing either an astigmatic real or virtual image of the distant point source. In figure 3, we have a curved line-scatterer in the XY plane of radius r and center of curvature C. Light from a distant point source PS shines downwards and reflects from the scatterer. Each ray from PS scatters into a hollow cone of rays where the angle of the cone depends on the position of the cone's vertex along the length of the curved scatterer. The cones' angles depend on the angle a. The axis of the cone is tangent to the curved scatterer.