Imaging system with a lens having increased light collection efficiency and a deblurring equalizer
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United States of America Patent
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Jan 10, 2012
Grant Date -
N/A
app pub date -
May 7, 2009
filing date -
Jan 27, 2005
priority date (Note) -
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Abstract
In one form, an imaging system comprises an imager that forms an image of an object in a field of view, a rotationally symmetric lens assembly disposed between the imager and the object, and an equalizer. The rotationally symmetric lens assembly provides increased collection efficiency for a given depth of field, whereby the rotationally symmetric lens assembly causes aberration, compared to a well-focused lens. The rotationally symmetric lens assembly comprises a front negative lens, a rear positive lens, and an aperture positioned between the front and rear lenses. The equalizer, which is connected to the imager, receives image data and at least partially compensates for the aberration caused by the rotationally symmetric lens assembly.
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