Wide Dynamic Range Imaging Sensor And Method
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United States of America Patent
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app pub date -
Mar 11, 2013
filing date -
Jul 7, 2008
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Abandoned
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Abstract
A system and method for sensing an optical input having a wide dynamic range includes providing a semiconductor material extending along a reference axis away from an optical input surface and having more than one substantially planar photodetecting regions disposed therein at different respective depths. The substantially planar photodetecting regions are configured to be overlapping and at least partially transverse to the reference axis, such that more than one of the regions absorb the optical input received through the optical input surface. Each of the photodetecting regions has an associated responsivity representative of the absorption of the incident optical signal. Preferably, the responsivity of each of the photodetecting regions is different for each of the photodetecting regions. A wide dynamic range sensor signal is produced by combining electrical output signals obtained from each of the more than one photodetecting regions.
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