Process for manufacturing an optical element from glass

A process for manufacturing an optical lens, the process comprising:

• providing a blank of glass, the blank having a volume;
• providing a first mold;
• providing at least a second mold, the second mold comprising an escape cavity slide, the escape cavity slide comprising a plunger and an elastic element mechanically coupled to the plunger;
• heating the blank;
• press-molding the blank to form an optical lens by moving first mold and second mold towards each other to form a closed cavity;
• due to press-molding
• the first mold forming the first optical surface of the lens;
• the first optical surface being within the intended light path through the lens,
• the second mold forming a second optical surface of the lens and at least part of a base edge having a volume;
• the second optical surface being within the intended light path through the lens;
• the base edge being not within the intended light path through the lens;
• the plunger being displaced depending on the volume of the blank such that extending from the base edge an additional edge of the optical lens that extends from the base edge is formed by means of the escape cavity slide, the volume of the additional edge depending on the volume of the blank
• wherein the plunger having an additional edge forming surface, the additional edge forming surface comprising a rim section and a middle section being set back with respect to the rim section.