• 专利标题: Ophthalmic diffractive multi-focal lens and method for manufacturing ophthalmic diffractive multi-focal lens
  • 申请号: US16074617
    申请日: 2016-02-09
  • 公开(公告)号: US11009723B2
    公开(公告)日: 2021-05-18
  • 发明人: Ichiro Ando
  • 申请人: MENICON CO., LTD.
  • 申请人地址: JP Nagoya
  • 专利权人: MENICON CO., LTD.
  • 当前专利权人: MENICON CO., LTD.
  • 当前专利权人地址: JP Nagoya
  • 代理机构: Oliff PLC
  • 国际申请: PCT/JP2016/053874 WO 20160209
  • 国际公布: WO2017/138099 WO 20170817
  • 主分类号: G02C7/04
  • IPC分类号: G02C7/04 G02B5/18 G02C7/02 A61F2/16
Ophthalmic diffractive multi-focal lens and method for manufacturing ophthalmic diffractive multi-focal lens
摘要:
Provided is an ophthalmic diffractive multi-focal lens with a diffractive structure including a phase profile in which a plurality of blaze shaped zones are set in a concentric circle form, wherein: at least one of the zones serves as an adjustment zone wherein an inclination direction in the phase profile is reversed with respect to that of other zones; and a light intensity level giving a peak or focal point at a position away from three focal points in a light intensity distribution of transmitted light in an optical axis direction is kept low in comparison with a phase profile without the adjustment zone.
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