Linear image scanner and scanning method
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Oct 21, 2015
filing date -
Oct 22, 2014
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Abstract
A linear image scanner capable of digitizing three-dimensional surfaces according to the photometric stereo technique has a linear type imaging sensor, a scanning plane, an optical system, an optical axis, a scan line, a lighting system with at least four independently controllable light sources arranged so that each light source enlighten the scan line from a different direction. At least two first light sources are arranged symmetrically respect to the vision plane and at least two second light sources are arranged symmetrically respect to the moving plane and so that the at least two first and two second light sources radiate the scan line from at least four different directions with uniform light intensity and uniform incident angles of the light sources over the entire length of the scan line. A scanning method is also described.
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