Patent ID: 11897190
Assignee: ALCON INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A continuous additive fabrication system for forming an intraocular lens (IOL), comprising:
a bath of photopolymer resin;
a light source assembly comprising a light source and a motorized variable aperture, the light source assembly configured to generate a focus point in the bath of photopolymer resin, a shape of the focus point at a curing plane within the bath of photopolymer resin corresponding to a shape of the motorized variable aperture; and
a drive mechanism coupled to the light source assembly, the drive mechanism configured to move the curing plane through the bath of photopolymer resin by moving the light source assembly vertically up and away from a surface of the photopolymer resin, thereby moving the curing plane vertically through the photopolymer resin towards the surface of the photopolymer resin, wherein the drive mechanism is further configured to vary a speed that the light source assembly moves away from the surface of the photopolymer resin according to calculated parameters to create an aspherical surface on the IOL,
wherein the motorized variable aperture is configured to change a diameter thereof at a rate that varies as the light source assembly is moved away from the surface of the photopolymer resin so as to form the IOL with a smooth hemispherical shape.