发明授权
- 专利标题: Progressive-power lens and progressive-power lens design method
- 专利标题(中): 渐进式功率透镜和渐进式透镜设计方法
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申请号: US13414331申请日: 2012-03-07
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公开(公告)号: US08684522B2公开(公告)日: 2014-04-01
- 发明人: Kazutoshi Kato , Yohei Suzuki
- 申请人: Kazutoshi Kato , Yohei Suzuki
- 申请人地址: PH Cavite
- 专利权人: Hoya Lens Manufacturing Philippines Inc.
- 当前专利权人: Hoya Lens Manufacturing Philippines Inc.
- 当前专利权人地址: PH Cavite
- 代理机构: DLA Piper LLP (US)
- 优先权: JP2011-049921 20110308
- 主分类号: G02C7/00
- IPC分类号: G02C7/00 ; G02C7/02 ; G02B7/06
摘要:
A progressive-power lens having an eyeball-side surface including a distance portion and a near portion having different values of dioptric power and an intermediate portion that connects the distance portion and the near portion to each other, and an object-side surface including a spherical first region having a first curvature and extending along a principal meridian, a spherical second region having a second curvature equal to the first curvature and facing the distance portion, and a third region located outside the first region and below the second region and having a third curvature smaller than the first curvature.
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