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Title:
SINGLE FOCUS SPECTACLE LENS, METHOD FOR DESIGNING SINGLE FOCUS SPECTACLE LENS, METHOD FOR MANUFACTURING SINGLE FOCUS SPECTACLE LENS, AND SINGLE FOCUS SPECTACLE LENS DESIGN DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/138641
Kind Code:
A1
Abstract:
In this single focus spectacle lens, the refractive index is non-uniform, the optical magnification is not defined only by the refractive index, astigmatism is at most equal to 0.15D in a position at a distance of 20 mm from the optical axis of the single focus spectacle lens, and the difference obtained by subtracting the refractive index at the optical axis from the refractive index at said position is at least equal to 0.015.

Inventors:
YOSHIDA YOSHINORI (JP)
Application Number:
PCT/JP2021/047326
Publication Date:
June 30, 2022
Filing Date:
December 21, 2021
Export Citation:
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Assignee:
NIKON ESSILOR CO LTD (JP)
International Classes:
G02C7/02
Foreign References:
JPS52115242A1977-09-27
JP2019537052A2019-12-19
JPS62296119A1987-12-23
JPH01316720A1989-12-21
Attorney, Agent or Firm:
NISHIZAWA Kazuyoshi et al. (JP)
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