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Imaging across the Short-Wave Infra-Red (SWIR) Band via a Flat Multilevel Diffractive Lens
Published 6 Aug 2019 in physics.optics and physics.app-ph | (1908.01945v1)
Abstract: We designed and fabricated a flat multi-level diffractive lens (MDL) that is achromatic in the SWIR band (875nm to 1675nm). The MDL had a focal length of 25mm, aperture diameter of 8.93mm and thickness of only 2.6um. By pairing the MDL with a SWIR image sensor, we also characterized its imaging performance in terms of the point-spread functions, modulation-transfer functions, and still and video imaging.
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