Figure 8.

Resolution due to defocus (gray line), slope errors on grating (blue line) and toroidal (red line), entrance and exit slits (green line), and their total (black) for gratings with line densities at their centers of 250 lines mm⁻¹ (bottom figure), 500 lines mm⁻¹ (middle figure) and 1000 lines mm⁻¹ (top figure).