Title:
CURVED FACE SHAPE EVALUATION METHOD, EYEGLASS LENS MANUFACTURING METHOD, AND EYEGLASS LENS
Document Type and Number:
WIPO Patent Application WO/2020/067028
Kind Code:
A1
Abstract:
Regarding this eyeglass lens that is provided with an object-side face and an eyeball-side face and that has a plurality of defocus areas in the object-side face and/or the eyeball-side face, evaluation of the surface shape is performed through: a step (S101) for measuring the surface shape of the face having the plurality of defocus areas in the eyeglass lens and acquiring three-dimensional data about the surface shape; a step (S103) for performing cluster analysis on the three-dimensional data and for classifying a data group relating to each of the plurality of defocus areas and a data group relating to a base area in which no defocus area is formed; a step (S104) for combining curved face shape data items obtained by performing curve fitting on the respective classified data groups, and for extracting reference shape data about the object-side face of the eyeglass lens; and a step (S105) for comparing the three-dimensional data with the reference shape data and obtaining the degree of divergence of the three-dimensional data from the reference shape data.
Inventors:
UCHIDANI TAKAHIRO (JP)
Application Number:
PCT/JP2019/037306
Publication Date:
April 02, 2020
Filing Date:
September 24, 2019
Export Citation:
Assignee:
HOYA LENS THAILAND LTD (TH)
UCHIDANI TAKAHIRO (JP)
UCHIDANI TAKAHIRO (JP)
International Classes:
G02C13/00; G02C7/06
Domestic Patent References:
| WO2019124352A1 | 2019-06-27 |
Foreign References:
| JP2015503769A | 2015-02-02 | |||
| JP2016051180A | 2016-04-11 | |||
| US20170013567A1 | 2017-01-12 |
Other References:
See also references of EP 3859438A4
Attorney, Agent or Firm:
ANIYA Setuo et al. (JP)
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