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Polarization-Based Imaging: Basics and Benefits

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With spatial correction, line scan polarization cameras detect birefringence, stress, surface roughness, and physical properties that cannot be detected with conventional imaging.

XING-FEI HE, TELEDYNE DALSA

There are three fundamental properties of light: intensity, wavelength, and polarization. Almost all cameras today are designed for monochrome or color imaging. A monochrome camera is used to measure the intensity of light over a broadband spectrum at pixel level1, while a color or multispectral camera is used to detect the intensities of light at the red, green, blue, and near-IR wavelength bands2,3. Similarly, a polarization camera captures the intensity of light at multiple polarization states. According to a recent AIA market study, worldwide camera sales in machine vision reached...Read full article

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