<p>Images of two-dimensional chromatograms or other sample arrays are formed on a scanning instrument that utilizes a line of illumination light that sweeps the length of the array either by moving across the array or by the array moving relative to the light, in either case scanning the entire two-dimensional array with a unidirectional pass of the moving component. The use of a CCD equipped with time delay integration allows the instrument to form an enhanced image.</p>
