Time delay integration in imaging devices

摘要

An imaging device for time delay integration (TDI) imaging of a subject 28. The imaging device comprises a two-dimensional array of pixels 30. The pixels 30 are arranged in columns. Each column is aligned with the direction of relative movement 22 between the imaging device and the subject 28. Pixels comprise a photo-sensitive element which is responsive to radiation during an integration period. Control circuitry is arranged to control the pixels in the array such that the pixels 30 in a column of the array are simultaneously exposed to radiation over a common integration period, with a start time of an integration period of the column of the array being offset from a start time of an integration period of at least one other column of the array. Columns of pixels 30 can be physically offset from one another. Readout buses 33 can be provided diagonally across the array to allow multiple columns to be simultaneously read.