US 11,708,289 B2
Process for the production of an optical element from glass
Christoph Dittmann, Neustadt an der Orla (DE); Alexander Kuppe, Neustadt an der Orla (DE); Annegret Diatta, Neustadt an der Orla (DE); Ralf Polle, Neustadt an der Orla (DE); Toni Schnoor, Neustadt an der Orla (DE); and Sven Fröhlich, Neustadt an der Orla (DE)
Assigned to DOCTER OPTICS SE, Neustadt An der Orla (DE)
Filed by Docter Optics SE, Neustadt an der Orla (DE)
Filed on Nov. 22, 2021, as Appl. No. 17/532,046.
Claims priority of application No. 10 2020 132 239.9 (DE), filed on Dec. 3, 2020.
Prior Publication US 2022/0177345 A1, Jun. 9, 2022
Int. Cl. C03B 19/02 (2006.01); F21S 41/25 (2018.01); C03C 21/00 (2006.01)
CPC C03B 19/025 (2013.01) [C03C 21/007 (2013.01); F21S 41/25 (2018.01)] 28 Claims
OG exemplary drawing
 
1. A method of producing a headlight lens, the method comprising:
heating a blank made of soda-lime glass;
providing a surface-treatment agent which comprises a solvent and a solid dissolved in the solvent, wherein the solid comprises at least one solid from the group consisting of aluminum, aluminum chloride, aqueous aluminum chloride, aluminum salt, fatty-acid aluminum salts, phosphate, potassium phosphate, sodium phosphate, KO2, KOH, KNO3, silicate, SiO2, potassium silicate and potassium;
providing a gas;
generating a spray mist by thoroughly mixing the surface-treatment agent with the gas;
providing a first mold;
providing at least a second mold;
providing a cooling path;
press-molding the heated blank to form a headlight lens having at least a first optically active surface by means of the first mold and the at least a second mold;
spraying the at least first optically active surface with the spray mist; and
cooling the headlight lens in accordance with a cooling regime in the cooling path by adding heat.