(color online) Dispersing and reimaging after the image mapper. One sub-lens of the lens array L3 and one prism of the prism array are depicted for clarity. Panel (a) illustrates the imaging direction, where the strip mirror is perpendicular to the plane. Panel (b) illustrates the spectral direction, where the strip mirror is parallel to the plane. Three strip mirrors are depicted for clarity; however, more mirrors are used in a practical system. The L3 and sensor are both tilted for the tilt induced by prism dispersion.^[7] Panel (c) shows the spectral data collected on the sensor. represents the dispersion position at and is the spectral spread from to .