Method of producing a lens with an embedded foil

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

• providing a first mould having an underside;
• providing a foil fixation holder;
• providing a second mould;
• providing a foil having at least one region being a curved surface;
• positioning the foil on the foil fixation holder;
• providing attachment dots on the first mould on the underside through application of an adhesive forming said attachment dots;
• positioning the first mould opposite to the foil fixation holder;
• displacing the first mould towards the foil fixation holder to ensure the contact of the attachment dots with a surface of the foil;
• after contacting the surface of the foil with the attachment dots, adjusting a contact distance between the first mould and the foil by increasing a displacement between the first mould and the foil fixation holder while maintaining contact of the attachment dots to both the surface of the first mould and the foil to ensure a desired contact distance between the surface of the first mould and the foil;
• retracting the foil fixation holder;
• positioning the second mould opposite to the first mould, wherein the foil is spaced from the second mould;
• connecting the first mould and the second mould at their circumferences with a sealing bridging element to build an assembly in order to form a mould cavity with a pouring opening, wherein an edge of the foil is spaced apart from the sealing bridging element and the assembly comprises passages between the attachment dots and the foil and the underside of the first mould;
• pouring a monomer into the mould cavity;
• curing the monomer into a polymer block or a finished lens;
• and
• decomposing the assembly, and thereby detaching the first mould and the second mould from the polymer block or the finished lens, respectively.

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

• providing a plurality of attachment dots on a surface of a foil, each attachment dot comprising adhesive;
• displacing a first mould towards the foil to contact the attachment dots with a surface of the first mould;
• after contacting the surface of the first mould with the attachment dots, adjusting a contact distance between the first mould and the foil by increasing a displacement between the first mould and the foil, the increasing causing stretching of the contacted attachment dots while maintaining contact of the attachment dots to both the surface of the first mould and the foil to ensure a desired contact distance between the surface of the first mould and the foil;
• positioning a second mould opposite to the first mould, wherein the foil is spaced from the second mould;
• forming a mould cavity between the first mould and the second mould, the foil being located within the mould cavity;
• dispensing a polymerizable material into the mould cavity;
• curing the polymerizable material in the mould cavity into a polymer block or a finished lens;
• and
• detaching the polymer block or the finished lens from the mould cavity.