IMAGE CAPTURING DEVICE FOR A VEHICLE
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United States of America Patent
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Feb 5, 2015
app pub date -
Jul 2, 2012
filing date -
Jul 5, 2011
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Abstract
The invention relates to an image capturing device comprising an image sensor. A first polarizing filter is arranged in at least one first subarea in front of the image sensor while a second polarizing filter is arranged in at least one second subarea. The polarizing filters have different directions of polarization (h;v). The image capturing device of the invention comprises an evaluation unit which is able to detect the presence of polarized light by comparing the intensities of the at least two subareas that are polarized differently. In other words, the intensity in the subarea of the image sensor which receives electromagnetic radiation that has passed through the first polarizing filter is compared with the intensity in the subarea of the image sensor which receives electromagnetic radiation that has passed through the second polarizing filter.
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