Optical lens

A method for determining a transfer law associated with a selected manufacturing method of a lens element, the lens element including a refraction area having a first curvature, and a plurality of optical elements disposed on at least part of the finished optical surface, each of the optical elements having at least a second curvature, the method comprising:

• providing lens data indicating at least a shape of said surface of the lens element to obtain, said surface of the lens element comprising a surface of the refraction area and a surface of the optical elements placed on the refraction area, the shape of said surface of the lens element being associated with a targeted optical function;
• selecting a manufacturing method intended to be implemented to obtain a surface of the lens element, said manufacturing method comprising surfacing and introducing surface defects on the surface of the lens element that are reproducible and specific to the manufacturing method in a repeatable manner;
• selecting a predictive model of said surface defects;
• determining, by said predictive model, surface defect data associated to the surface defects introduced by the selected manufacturing method;
• and
• determining the transfer law corresponding to transformations to apply to the shape of the surface of the lens element to compensate the surface defects introduced by the selected manufacturing method such that the targeted optical function is obtained by the selected manufacturing method.

A method for determining a transfer law associated with a selected manufacturing method of a lens element, the method comprising:

• providing a lens element which has been manufactured with the selected manufacturing method, the lens element comprising:
• a refraction area having a first curvature, and
• a plurality of optical elements disposed on at least part of the finished optical surface, each of the optical elements having at least a second curvature;
• providing lens data indicating at least a shape of said surface of the lens element to obtain, said surface of the lens element comprising a surface of the refraction area and a surface of the optical elements placed on the refraction area, the shape of said surface of the lens element being associated with a targeted optical function;
• measuring at least one optical characteristic of at least a zone of the lens element;
• determining at least one optical characteristic error based on a comparison of the measured at least one optical characteristic and the targeted optical function;
• compiling information corresponding to the determined optical characteristic error into a database as correction information;
• and
• determining the transfer law associated with the selected manufacturing method used to manufacture the lens element based on the correction information of the database, the transfer law corresponding to transformations to apply to correct an original shape of the surface of the lens element comprising the at least one optical element to compensate for the surface defects introduced by the selected manufacturing method so that once manufactured by the selected manufacturing method, the lens element reaches the targeted optical function, the surface defects being reproducible and specific to the selected manufacturing method in a repeatable manner.

A non-transitory computer-readable medium on which is stored a series of instructions, which, when loaded in a computer, results in the execution by said computer of a method for determining surfacing data to obtain a lens element, the lens element including a refraction area having a first curvature, and a plurality of optical elements disposed on at least part of the finished optical surface, each of the optical elements having at least a second curvature, the method comprising:

• providing lens data indicating at least a shape of said surface of the lens element to obtain, said surface of the lens element comprising a surface of the refraction area and a surface of the optical elements placed on the refraction area, the shape of said surface of the lens element being associated with a targeted optical function;
• selecting a manufacturing method intended to be implemented to obtain said surface of the lens element, said selected manufacturing method introducing surface defects on said surface of the lens element that are reproducible and specific to the manufacturing method in a repeatable manner, the surface defects modificating the targeted optical function;
• providing a transfer law associated with the selected manufacturing method, the transfer law corresponding to transformations to apply to the shape of the surface of the lens element to compensate the surface defects introduced by the selected manufacturing method such that the targeted optical function is obtained by the selected manufacturing method;
• and
• determining the surfacing data to obtain the surface of the lens element associated with the targeted optical function, the determining the surfacing data being based on the lens data and the transfer law.

A method implemented by a computer to determine surfacing data to obtain a surface of a mold of a lens element, the lens element including a refraction area having a first curvature, and a plurality of optical elements disposed on at least part of the finished optical surface, each of the optical elements having at least a second curvature, the method comprising:

• providing lens data indicating at least a shape of said surface of the mold of the lens element to obtain, the surface of the lens element comprising a surface of the refraction area and a surface of the optical elements placed on the refraction area, the shape of the surface of the lens element being associated with a targeted optical function;
• selecting a manufacturing method intended to be implemented to obtain said surface of a mold of the lens element, said selected manufacturing method introducing surface defects on said surface of the mold of the lens element that are reproducible and specific to the manufacturing method in a repeatable manner, the surface defects modificating the targeted optical function;
• providing a surfacing transfer law associated with the selected manufacturing method, the surfacing transfer law corresponding to transformations to apply to the shape of the mold of the surface of the lens element to compensate the surface defects introduced by the selected manufacturing method such that the targeted optical function is obtained by the selected manufacturing method;
• and
• determining the surfacing data to obtain the surface of the mold of the lens element associated with the targeted optical function, the determining the surfacing data being based on the lens data and the surfacing transfer law.

A lens element intended to correct an abnormal refraction of an eye of a person, the lens element comprising:

• a refractive area having a first surface optical power;
• and
• a plurality of optical elements disposed on at least one surface of the holder, the plurality of optical elements having a second surface optical power and each optical element having a maximum sag,
• wherein the holder and the plurality of optical elements are intended to be polished, the maximum sag of the plurality of the optical elements is at least 10% higher than the maximum sag of the plurality of the optical elements after polishing.