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CN-122003324-A - Method for producing an ophthalmic lens

CN122003324ACN 122003324 ACN122003324 ACN 122003324ACN-122003324-A

Abstract

The application relates to a method for manufacturing an ophthalmic lens, comprising the steps of-curing a coating material on a surface of an ophthalmic lens using optical radiation emitted by an intense light source, said coating material producing a coating on said surface of said ophthalmic lens, characterized in that the wavelength range of said optical radiation emitted by said intense light source is limited by at least one of i) a wavelength at the intersection of the emission spectrum of said intense light source and the absorption spectrum of the ophthalmic lens and b) a maximum wavelength of optical radiation emitted by said intense light source, ii) a wavelength greater than the wavelength at the intersection of the emission spectrum of said intense light source and the absorption spectrum of the ophthalmic lens and b) a maximum wavelength of optical radiation emitted by said intense light source, iii) a wavelength smaller than the wavelength at the intersection of the emission spectrum of said intense light source and the absorption spectrum of the ophthalmic lens and b) a maximum wavelength of optical radiation emitted by said intense light source.

Inventors

  • H. Sha Li phenanthrene
  • W. Karim
  • S. SCHMIDT

Assignees

  • 卡尔蔡司光学国际有限公司

Dates

Publication Date
20260508
Application Date
20250901
Priority Date
20240903

Claims (14)

  1. 1. A method for manufacturing an ophthalmic lens, the method comprising the steps of: Curing a coating material on a surface of an ophthalmic lens using optical radiation emitted by an intense light source, said coating material producing a coating on said surface of said ophthalmic lens, for a total curing time ranging from 1 ms to 3min, The method is characterized in that the wavelength range of the optical radiation emitted by the intense light source is excluded, the excluded wavelength range being one selected from the following: i) From a) the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) the wavelength of the minimum wavelength of the optical radiation emitted by the intense light source, Ii) from a) a wavelength having a value of 1% to 35% greater than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) a wavelength range of the minimum wavelength of the optical radiation emitted by the intense light source, Iii) From a) a wavelength having a value of 1% to 25% smaller than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) a wavelength range of the minimum wavelength of the optical radiation emitted by the intense light source, For i) to iii), the emission spectrum of the intense light source is normalized to the maximum of the emission spectrum And the absorption spectrum of the spectacle lens is a spectrum of an absorptance of the spectacle lens as a function of wavelength.
  2. 2. The method of claim 1, wherein the wavelength having the value that is 1% to 35% greater than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the eyeglass lens is any wavelength in a wavelength range between: a) A wavelength at an intersection point of an emission spectrum of the strong light source and an absorption spectrum of the eyeglass lens, excluding the wavelength at the intersection point, and B1 A minimum wavelength at which the absorptivity of the spectacle lens is equal to 2% or 0.02, including the minimum wavelength, or B2 A wavelength of at least one of: 10% to 30% greater than said wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens, including the corresponding wavelength, 12% To 25% greater than said wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens, including the corresponding wavelength, -14% To 20% greater than said wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens, including the corresponding wavelength.
  3. 3. The method according to any one of claims 1 and 2, wherein the wavelength having a value that is 25% less than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens is any wavelength in a wavelength range between: a) A wavelength at an intersection point of an emission spectrum of the strong light source and an absorption spectrum of the eyeglass lens, excluding the wavelength at the intersection point, and B1 A cut-off wavelength of the spectacle lens, including the cut-off wavelength, in the case where the cut-off wavelength is smaller than the wavelength at the intersection point, or B2 A maximum wavelength of ultraviolet radiation, comprising a corresponding maximum wavelength of ultraviolet radiation.
  4. 4. A method according to any one of claims 1 to 3, characterized in that the wavelength that is greater than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens, or the wavelength that is less than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens, are each selected such that the radiant flux emitted by the intense light source is sufficient to cure the coating material on the surface of the spectacle lens within the total curing time.
  5. 5. The method of claim 4, wherein the radiant flux is applied with irradiance I within one of the following ranges: A range of 1000 mW/cm 2 ≤ I ≤ 40000 mW/cm 2 , 10000 MW/cm 2 ≤ I ≤ 40000 mW/cm 2 , -20000 MW/cm 2 ≤ I ≤ 40000 mW/cm 2 .
  6. 6. The method according to any one of claims 1 to 5, characterized in that the excluded wavelength range is selected such that an overlap between the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens in the form of a wavelength range ensures that the spectacle lens absorbs greater than or equal to 2.0% of the optical radiation emitted by the intense light source.
  7. 7. The method of claim 6, wherein the overlap is within one of the following ranges: From 3% to 90%, from 5% to 60%, from 7% to 30%, from 8% to 15%, in the case of a transparent spectacle lens as defined in ISO 13666:2019 (E) clause 3.5.7, From 12% to 90%, from 13% to 75%, from 14% to 60%, from 15% to 45%, in the case of tinted spectacle lenses, as defined in ISO 13666:2019 (E) item 3.5.6, -A range from 12% to 90%, a range from 14% to 70%, a range from 16% to 50%, a range from 19% to 35%, in the case of photochromic spectacle lenses, as defined in ISO 13666:2019 (E) clause 3.5.11.
  8. 8. The method according to any one of claims 1 to 7, wherein the temperature on the surface of the spectacle lens or the temperature of the spectacle lens does not exceed a temperature of 170 ℃.
  9. 9. The method according to claim 8, characterized in that, in order to ensure said temperature on said surface of the spectacle lens or said temperature of the spectacle lens, the average reflectivity R of the cured plate carrying the spectacle lens is within one of the following ranges: - > 5% to R≥70%, - > 35% To R≥70%.
  10. 10. The method of claim 9, wherein the temperature at the point of contact between the ophthalmic lens and the cured plate carrying the ophthalmic lens does not exceed a temperature of 250 ℃.
  11. 11. A method implemented by a processor and configured for generating curing process parameters configured for use in curing a coating material on a surface of an ophthalmic lens, the coating material being curable by radiation energy emitted by a strong light source, the method characterized by the steps of: -determining a wavelength range of optical radiation between a minimum wavelength emitted by the intense light source and an intersection point between an emission spectrum of the intense light source and an absorption spectrum of the spectacle lens, the emission spectrum of the intense light source being normalized for a maximum of the emission spectrum, and the absorption spectrum of the spectacle lens being an absorbance of the spectacle lens as a function of wavelength.
  12. 12. A computer program comprising instructions which, when executed by a computer, cause the computer to carry out the method according to claim 11.
  13. 13. A computer readable storage medium having stored thereon a computer program according to claim 12.
  14. 14. A data signal carrying the computer program according to claim 13.

Description

Method for producing an ophthalmic lens Technical Field The present invention relates to a method for manufacturing an ophthalmic lens according to the preamble of claim 1 and a method implemented by a processor and configured for generating curing process parameters according to the preamble of claim 11. Background WO 00/56527 A1 discloses the use of a flash lamp (such as a xenon light source) emitting pulses of activating light to cure a coating composition on an ophthalmic lens. EP 4 171 932 A1 discloses the use of a single electromagnetic pulse to efficiently cure a coating precursor material on the surface of an ophthalmic lens such that the mechanical, optical or functional properties of the coated ophthalmic lens are adjusted over a total process duration of 1 ms to 3 min (i.e., over a significantly reduced cure time compared to conventional oven curing processes). Problems to be solved Unlike WO 00/56527 A1, page 75, lines 26 to 29, which suggest that activating light is applied at an intensity of 150 to 300 mW/cm 2 in the wavelength range of about 360 to 370 nm and at an intensity of about 50 to 150 mW/cm 2 in the wavelength range of about 250 to 260 nm to cure a liquid scratch resistant coating composition to a solid, the problem addressed by the present invention is to apply activating light at an increased intensity to cure a liquid coating composition to a solid. Disclosure of Invention This problem has been solved by a method for manufacturing an ophthalmic lens according to claim 1 and a method implemented by a processor and configured for generating curing process parameters according to claim 11. The method for manufacturing an ophthalmic lens comprises the steps of: curing a coating material on a surface of an ophthalmic lens using optical radiation emitted by an intense light source during a curing time ranging from 1 ms to 3 min, said coating material producing a coating on said surface of said ophthalmic lens, The method is characterized in that a certain wavelength range of the optical radiation emitted by the intense light source is excluded, the excluded wavelength range being one selected from the following: i) A wavelength range from a) a wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) a minimum wavelength of the optical radiation emitted by the intense light source, Ii) from a) a wavelength having a value of 1% to 35% greater than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) a wavelength range of the minimum wavelength of the optical radiation emitted by the intense light source, Iii) From a) a wavelength having a value of 1% to 25% smaller than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens to b) a wavelength range of the minimum wavelength of the optical radiation emitted by the intense light source. For i) to iii), the emission spectrum of the intense light source is normalized for the maximum of the emission spectrum, and the absorption spectrum of the spectacle lens is the spectrum of the absorption rate of the spectacle lens as a function of wavelength. In other words, the method for manufacturing an ophthalmic lens comprises the steps of: curing a coating material on a surface of an ophthalmic lens using optical radiation emitted by an intense light source during a curing time ranging from 1 ms to 3 min, said coating material producing a coating on said surface of said ophthalmic lens, Characterized in that the wavelength range of the optical radiation emitted by the intense light source is selected from one of the following wavelength ranges i) or ii) or iii): i) A wavelength range between a) the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens and b) the maximum wavelength of the optical radiation emitted by the intense light source, Ii) a wavelength range between a) a wavelength having a value of 1% to 35% greater than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens and b) the maximum wavelength of the optical radiation emitted by the intense light source, Iii) A wavelength range between a) a wavelength having a value of 1% to 25% smaller than the wavelength at the intersection of the emission spectrum of the intense light source and the absorption spectrum of the spectacle lens and b) a maximum wavelength of the optical radiation emitted by the intense light source, For i) to iii), the emission spectrum of the intense light source is normalized for the maximum of the emission spectrum, and the absorption spectrum of the spectacle lens is the spectrum of the absorption rate of the spectacle lens as a function of wavelength