Dynamic range of a line scanner having a photosensitive array that provides variable exposure
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United States of America Patent
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Mar 6, 2018
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N/A
app pub date -
Dec 23, 2016
filing date -
Dec 31, 2013
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Abstract
A line scanner measures 3D coordinates of an object surface and includes a projector with a light source that projects a line of light at the object surface. The line scanner also has a camera with a 2D array of light sensors and electronics that controls the exposure and readout times of each light sensor, the exposure time being controlled in either rows or columns of the array in a non-sequential manner, the readout time being controlled in either rows or columns that are the same as the rows or columns whose exposure time is being controlled, each of the light sensors converts an amount of captured optical energy into a digital signal value, the captured optical energy being from a reflected line of light from the object surface. Further includes a processor that receives the digital signal values and calculates the 3D coordinates of the object surface.
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