Fig. 5.

Sequential experimental calibration procedure. (a) Each element of object space (x, y, λ) can be illuminated sequentially with a spatial-spectral point source while recording the detector (u, v) response. The forward mapping of object coordinates to detector space describes T[(x, y, λ)} → (u, v). (b) Applying the remapping T⁻¹{(u, v)} → (x, y, λ) allows the object datacube to be accurately reconstructed from raw data. (c) Subpixel coordinates obtained from the mapping calibration are overlaid on raw detector data.