PRODUCTION OF PLASTIC LENS

摘要

PURPOSE:To avoid the waste of material, eliminate the supplementary process such as polishing and reduce the number of concave and convex molds and the occurrence of defects such as lens nick by chamfering the peripheral part on the convex mold side. CONSTITUTION:Two molds 1 and 2 are set up and pressure-sensitive adhesive tape 4 is wound around over two convex and concave molds to form a cavity in which the plastic material consisting mainly of liquid curable compound is hardened to form a casting plastic lens. At this time, the peripheral part of the convex mold 1 is chamfered to obtain the plastic lens of a desired diameter.