Optical lens

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

• a refraction area having a first curvature and
• a plurality of optical elements placed on at least part of the finished optical surface, each optical element having at least a second curvature,
• wherein the method comprising:
• providing S30 lens data, the 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 at least a shape of said surface of the lens elements being associated with a targeted optical function;
• selecting S31 a manufacturing method intended to be implemented to obtain a surface of the lens element, in which said manufacturing method comprises surfacing and introduces surface defects on the surface of the lens element;
• selecting S32 a predictive model of said surface defects;
• determining S33, by means of said predictive model, a surface defect data associated to the surface defects introduced by the selected manufacturing method;
• from the surface defect data and the lens data, determining S34 a transfer law corresponding to transformations to apply to the shape of the surface of the lens element for compensating 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 S40 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 placed on at least part of the finished optical surface, each optical element having at least a second curvature;
• providing S41 lens data, the 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 at least a shape of said surface of the lens elements being associated with a targeted optical function;
• measuring S42 at least one optical characteristic of at least a zone of the lens element;
• determining S43 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 S44 corresponding to the determined optical characteristic error into database as correction information;
• determining S45 a 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 correcting an original shape of the surface of the lens element comprising the at least one optical element so that once manufactured by the selected manufacturing method, the lens element reaches the targeted optical function.

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 the steps of a method for determining surfacing data to obtain a lens element, the lens element comprising:

• a refraction area having a first curvature and
• a plurality of optical elements placed on at least part of the finished optical surface, each optical element having at least a second curvature;
• and
• wherein the method comprises:
• providing lens data, the 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 at least a shape of said surface of the lens elements being associated with a targeted optical function;
• selecting a manufacturing method intended to be implemented to obtain said surface of the lens element, in which said manufacturing method introduces surface defects on said surface of the lens element, the surface defects modificating the targeted optical function;
• providing a surfacing 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 for compensating 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.

Method implemented by computer means for determining surfacing data to obtain a surface of a mold of a lens element, the lens element comprising:

• a refraction area having a first curvature and
• a plurality of optical elements placed on at least part of the finished optical surface, each optical element having at least a second curvature;
• and
• wherein the method comprises:
• providing lens data, the 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 at least a shape of the surface of the lens elements 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, in which said manufacturing method introduces surface defects on said surface of the mold of the lens element, the surface defects modificating the targeted optical function;
• providing a surfacing transfer law associated with the selected manufacturing method,
• the transfer law corresponding to transformations to apply to the shape of the mold of the surface of the lens element for compensating 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 transfer law.