Method for manufacturing polarised lenses for spectacles and lenses produced using that method
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United States of America Patent
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Mar 7, 2017
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Jun 30, 2016
app pub date -
Jul 10, 2014
filing date -
Jul 26, 2013
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Abstract
A method of manufacturing a polarizing lens for spectacles in which the lens is obtained by injection co-molding the material of the lens on a polarizing optical filter structure is described. The optical filter structure which already has its curved shape received during the stage of filter manufacture is subjected to a thermoforming stage before being inserted into the injection mold in order that the optical filter should obtain the desired curvature for the subsequent stage of injection co-molding the lens onto the optical filter structure.
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