Structure of microprismatic Fresnel lenses for creating uniform focal images.
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DOI: 10.1364/oe.438590
Abstract: Flat Fresnel lenses are known to form a point image in the focal plane. However, several practical applications require transforming lens to concentrate a parallel light beam into a uniformly illuminated light circle. We previously… read more here.
Keywords: lenses creating; fresnel lenses; structure microprismatic; microprismatic fresnel ... See more keywords