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Back-Thinned TDI-CCD

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Back-thinned TDI (time delay integration)-CCDs allow acquiring high S/N images even under low-light conditions during high-speed imaging and the like. TDI operation yields dramatically enhanced sensitivity by integrating the exposure of a moving object. In CCD operation, a signal charge is transferred to the output section while being held in potential wells so as not to mix with other individual charges. TDI operation makes good use of this CCD charge transfer principle, and it is an effective technique for imaging a moving object or a still object while scanning it with a CCD sensor that is itself being moved.
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