Book Analog Interfacing to Embedded Microprocessors
arrays is less expensive than three single-line arrays of equivalent characteris-
tics. Typical trilinear CCDs include the Kodak KLI series and the Sony ILX
series.
A trilinear array solves the alignment problem of using three individual
CCDs, but still has three individual outputs that require 3 ADCs. The
three arrays in a trilinear part are side by side, but separated by some distance
(Figure 3.21). In the Kodak KLI-2113 and the Sony ILX724, the pixel
arrays are separated by a distance of 8 pixels. As shown in Figure 3.21, a
given point on the image appears at one array in the CCD first (blue, in the
figure), at the middle array second, and finally at the last array. However, all
three outputs of the CCD are active the entire time, meaning that the data is
skewed.
This problem can be fixed in software by taking the data from the buffers
in an offset fashion; data from scan 0 of the blue buffer is combined with data
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