Non parallel sides extending between the reflective surfaces are used to provide total internal reflection and concentrate all of the incoherent light beams into a smaller area, Alignment of {HEAD ~ the incoherent light beam} according to {TAIL ~ a predetermined angle} causes the escaping light beams to be adjacent to each other and produce a uniform and continuous line of light free from destructive interference areas 
Non parallel sides extending between the reflective surfaces are used to provide total internal reflection and concentrate all of the incoherent light beams into a smaller area , Alignment of { HEAD ~ the incoherent light beam } according to { TAIL ~ a predetermined angle } causes the escaping light beams to be adjacent to each other and produce a uniform and continuous line of light free from destructive interference areas
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