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METHOD FOR PRODUCING PROGRESSIVE POWER EYEGLASS LENS

  • US 20120013030A1
  • Filed: 03/31/2010
  • Published: 01/19/2012
  • Est. Priority Date: 03/31/2009
  • Status: Active Grant
First Claim
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1. A method for producing a progressive-addition spectacle lens having a prism thinning applied thereto comprising:

  • a lens molding die forming step of forming a lens molding die configured by a first molding die having a molding face for forming one optical surface, which is a progressive-addition surface, of the lens and a second molding die having a molding face for forming the other optical surface of the lens, wherein the first molding die and the second molding die are arranged so that the respective molding faces thereof face inner side;

    a filling step of filling a lens material liquid containing a monomer composition into the formed lens molding die; and

    a curing step of polymerizing and curing the filled lens material liquid so as to form the lens,wherein the molding face of the first molding die is formed so that a normal line at a point where the molding face of the first molding die intersects with a reference axis of the first molding die is inclined in the vertical direction with respect to the reference axis of the first molding die, andwherein the lens molding die forming step comprises;

    a molding die holding step of holding the both molding die so that the reference axis of the first molding die is inclined in the vertical direction with respect to a reference axis of the second molding die; and

    an adhesive tape wrapping step of wrapping an adhesive tape around circumferential surfaces of the both molding dies held in the molding die holding step with the adhesive face of the adhesive tape facing inward.

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