| http://www.w3.org/ns/prov#value | - Further, in other exemplary embodiments, the lens is a Fresnel lens which shapes the cross-section of the beam of light to create an elliptically-shaped cross-section with a major axis and a minor axis, where the major axis lies in a plane that is approximately normal to an optical axis of a system that receives images of objects illuminated by the light beam.
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