Control for a photosensor array

摘要

A line array of photosensors is exposed two times for each scanline. For the first exposure, charges are transferred from the line array to the charge transfer register after an appropriate exposure time that does not saturate photosensors. While the resulting charges are shifted and converted, the line array is exposed again for a relatively long duration, possibly resulting in overflow. The charges in the line array from the second exposure (during shifting and conversion) are discarded.