Process for transferring coatings onto a surface of a lens substrate with most precise optical quality

A process for transferring at least one coating onto at least one geometrically defined surface of a lens substrate, which comprises the steps of:

• (a) obtaining a carrier having a main surface bearing at least one functional coating;
• (b) obtaining a lens substrate having at least one geometrically defined surface;
• (c) depositing, either on said at least one functional coating or said at least one geometrically defined surface of the lens substrate, a layer of a transparent adhesive composition;
• (d) bringing said layer of transparent adhesive composition to a state at which the layer becomes unflowable under the process conditions if said layer is not already in such a state at the end of step (c);
• (e) moving the carrier and the lens substrate relatively to each other to bring the layer of transparent adhesive composition into direct contact with either said at least one geometrically defined surface of the lens substrate or said at least one functional coating;
• (f) pressing together the layer of transparent adhesive composition and either said at least one functional coating or said at least one geometrically defined surface of the lens substrate;
• (g) optionally, applying heat during pressing step (f);
• (h) stopping pressing step (f);
• and
• (i) withdrawing the carrier to recover the lens substrate coated with said at least one functional coating adhering to said at least one geometrically defined surface through the layer of transparent adhesive composition.