Method and apparatus for generating a surface of an optical lens

摘要

A method of generating a target surface {tilde over (S)}( λ) of an optical lens for the manufacture of the optical lens according to optical lens parameters λ, the method comprising: providing a set of L first surface difference data E(λj) each first surface difference data E(λj) corresponding to the surface difference between a pre-calculated surface Sλjpc(αλj) (j=1, . . . , L) and an initial surface Sλjini (j=1, . . . , L), from which the target surface will be generated, according to the expression:
E(λj)=Sλjpc(αλj)−Sλjini (j=1, . . . , L)
where λj (j=1, . . . , L) correspond to the optical lens parameters of the pre-calculated optical lenses; providing a set of second surface difference data {tilde over (E)}( λ) corresponding to the surface difference between the target optical surface {tilde over (S)}( λ) and the initial surface Sλini by linear interpolation of the first surface difference data E(λj) according to the expression:
;E~⁡(λ_)=∑j=1L⁢wjλ_⁢E⁡(λj),
where wjλ represents an interpolation coefficient; and; determining the target surface {tilde over (S)}( λ) by combining the second surface difference data {tilde over (E)}( λ) and the initial surface Sλini according to the expression: {tilde over (S)}( λ)={tilde over (E)}( λ)+Sλini.

主权项

1. A method of generating a target optical surface {tilde over (S)}( λ) of an optical lens according to optical lens parameters λ, for manufacturing the optical lens, the method comprising the steps of:
providing a set of L first surface difference data E(λj) each first surface difference data E(λj) corresponding to a surface difference between a pre-calculated surface Sλjpc(αλj)(j=1, . . . , L) and an initial surface Sλjini (j=1, . . . , L), from which a target surface of the optical lens is generated, according to:
E(λj)=Sλjpc(αλj)−Sλjini(j=1, . . . , L)where λj (j=1, . . . , L) correspond to the optical lens parameters of optical lenses associated with the pre-calculated surfaces;
providing a set of second surface difference data {tilde over (E)}( λ) corresponding to a surface difference between the target optical surface {tilde over (S)}( λ) and the initial surface Sλini by linear interpolation of the first surface difference data E(λj) according:E~⁡(λ_)=∑j=1L⁢wjλ_⁢E⁡(λj),  where wjλ represents an interpolation coefficient; and; determining by a processor the target surface {tilde over (S)}( λ) of the optical lens by combining the second surface difference data {tilde over (E)}( λ) and the initial surface Sλini according to:
{tilde over (S)}( λ)={tilde over (E)}( λ)+Sλini.