EurekAlert July 29, 2019
Researchers at Duke University used a coded aperture, which acts as a filter that allows light to pass through some areas but not others in a specific pattern, followed by a prism. After the speckle is “stamped” by the coded aperture, it passes through a prism that causes different frequencies of light to spread out from each other. The pattern from the coded aperture shifts slightly in relation to the image being captured by the detector; the amount it shifts is directly related to the color of light passing through. They developed an algorithm that teases out individual speckle patterns apart from each color which helps figure out what the object looks like for each color. According to the researchers their approach could find applications in fields such as astronomy and healthcare…read more. Open Access TECHNICAL ARTICLE
Researchers have created a method that takes light from colored numerals that has been scattered by a mostly opaque surface and uses its ‘speckle’ patterns and a coded aperture to reconstruct the image. Credit: Michael Gehm, Duke University