Facet deformation minimizing fresnel lens die roller and manufacturing method
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United States of America Patent
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Dec 2, 2014
Grant Date -
Jul 12, 2012
app pub date -
Jan 8, 2011
filing date -
Jan 8, 2011
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Abstract
A die roller and method for making a die roller for use in manufacturing Fresnel lens angular segments or sub-segments, the die roller having one or more segment dies and curvilinear Fresnel facet dies, the Fresnel facet dies having a collar, a peak, and a base, the collar being sloped, the peak being rounded, and the base being rounded, according to a die algorithm based upon one or more facet factors, in order to reduce the deformation of Fresnel lens angular segments or sub-segments extruded with the die roller.
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