Patent ID: 9733492
Date: 2017-08-15
CPC Classifications: G02C

Claim:
1. A set of spectacle lens semifinished products, which each have a front surface with a spherical or rotationally symmetric aspherical, convex form, which has at least one physical form feature with an associated form dimension, the set comprising: a first series of spectacle lens semifinished products made of a base material with a first average refractive index (n a second series of spectacle lens semifinished products made of a base material with a second average refractive index (n a third series of spectacle lens semifinished products made of a base material with a third average refractive index (n at least three different types of the pairwise different types of the second series having an actual surface power value (D at least three different types of the pairwise different types of the third series having an actual surface refractive power value (D the form dimensions of the at least one physical form feature of the form of the front surfaces of the at least three different types of the first series and the form dimensions of the at least one physical form feature of the form of the front surfaces of the at least three different types of the second series and the form dimensions of the at least one physical form feature of the form of the front surfaces of the at least three different types of the third series being identical, wherein the at least one form feature is: a) the actual curvature and/or b) the actual radius of curvature and/or c) the vertex curvature (ρ) of the conic section of the correction polynomial of the aspherical surface section defined in DIN ISO 10110, consisting of the sum of a conic section and a correction polynomial, in accordance with the equation where z is the sagittal height, r is the incident height, ρ is the vertex curvature and k is the conic constant of the conic section, and A4, A6, . . . are the coefficients of the correction polynomial.