US 11,813,814 B2 · Method of producing a lens with an embedded foil

Abstract

A method of producing a lens with an embedded foil, comprising the steps of positioning a foil (10) on a foil fixation holder, providing adhesive attachment dots (41) on the foil (10) on surface portions (12) opposite to the foil fixation holder, positioning the front mould (30) ensuring the contact of the attachment dots (41) with a surface (31) of the front mould (30), retracting the foil fixation holder and positioning a back mould (120) opposite to the front mould (30). Then the front mould (30) and the rear mould (120) are connected with a sealing bridging element (90) to build an assembly in order to form a mould cavity (45, 155) with a pouring opening, wherein the edge (11) of the foil (10) is spaced apart (112) from the bridging element (90) and the assembly comprises passages between the attachment dots (141), the foil (10) and the front mould backside (31) allowing pouring a monomer into the entire mould cavity (45, 155) before curing the monomer and decomposing the assembly as well as cutting the lens with the embedded foil from the polymer block.

Claims22

Dependent claims

A method of producing a lens with an embedded foil, the method comprising:

positioning a foil on a foil holder;
applying at least two dots of an adhesive at different locations on a surface of the foil;
positioning a first mould relative to the foil so that a surface of the first mould faces the surface of the foil;
displacing the first mould relative to the foil;
contacting the dots of the adhesive with the surface of the first mould;
increasing a displacement between the surface of the first mould and the surface of the foil while maintaining contact of the dots of the adhesive to both the surface of the first mould and the surface of the foil;
releasing the foil from the foil holder while maintaining contact of the dots of the adhesive to both the surface of the first mould and the surface of the foil;
positioning a second mould opposite to the first mould to form a cavity between the surface of the first mould and a surface of the second mould, the foil being spaced from the surface of the second mould within the cavity;
filling the cavity with a curable compound;
curing the curable compound to form a lens having a shape of cavity, the foil being embedded in the lens;
and
detaching the lens with the embedded foil from the first mould and the second mould.

9 more elements

Dependencies are inferred from the claim text.

Method of producing a lens with an embedded foil

Life of this patent

Method of producing a lens with an embedded foil

Life of this patent

Abstract

Claims22