- 专利标题: Ophthalmic diffractive multi-focal lens and method for manufacturing ophthalmic diffractive multi-focal lens
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申请号: US16074617申请日: 2016-02-09
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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
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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