Two-dimensional data may be acquired at extremely high rates by means of a linear sensor array, and ganged shift registers with each sensor associated with at least one shift register. The state of each sensor is sampled periodically in accord with a selected, relatively high clock frequency and each...http://www.google.de/patents/US3941982?utm_source=gb-gplus-sharePatent US3941982 - Method and apparatus for two-dimensional data acquisition
