Title:
眼鏡レンズ
Document Type and Number:
Japanese Patent JP7269002
Kind Code:
B2
Abstract:
To provide a spectacle lens with adjustable diopter.SOLUTION: A spectacle lens is provided, having an electrically-activated Fresnel zone plate 20 configured such that a diffraction grating pattern comprising transmissive regions that transmit light and non-transmissive regions that do not transmit light appears when electrically activated, and that the pattern disappears when electrically deactivated.SELECTED DRAWING: Figure 1
Inventors:
Keisuke Nakajo
Application Number:
JP2018244567A
Publication Date:
May 08, 2023
Filing Date:
December 27, 2018
Export Citation:
Assignee:
Nikon Essilor Co., Ltd.
International Classes:
G02C7/08; G02B3/08; G02B5/18
Domestic Patent References:
| JP62062340A | ||||
| JP2013047823A |
Foreign References:
| WO2017120588A1 | ||||
| US20130128334 | ||||
| CN108646448A | ||||
| US20100241196 |
Attorney, Agent or Firm:
Kazuzumi Nishizawa
Kazunori Onami
Junichi Kobayashi
Kazunori Onami
Junichi Kobayashi