Patent ID: 11932566
Assignee: DOCTER OPTICS SE
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 12:
13. A method for producing a headlight lens, the method comprising:
providing a first mold;
providing at least one second mold;
providing a cooling path;
heating a blank made of soda-lime glass;
press-molding the heated blank to form the headlight lens having at least one first optically effective surface using the first mold and the at least one second mold;
spraying the at least one first optically effective surface with a surface-treatment agent which promotes cross linking of oxygen ions with silicon ions on the at least one first optically effective surface, wherein the surface-treatment agent comprises a solvent and a solid dissolved in the solvent, wherein the solid comprises an amount of ammonium sulfate; and
then, cooling the headlight lens in accordance with a cooling regime in the cooling path with the addition of heat to prevent any internal stress within the headlight lens.