| http://www.w3.org/ns/prov#value | - or receiving said input beam and redistributing the beam rays to form a beam of different intensity distribution at a region spaced therefrom, (b) and refracting means position near said region and including at least one aspherical surface for redirecting the redistributed rays to form an out-put beam of substantially uniform intensity distribution over a substantially planar surface thereof, (c)
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