发明名称 |
Progressive-power lens and progressive-power lens design method |
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. |
申请公布号 |
US8684522(B2) |
申请公布日期 |
2014.04.01 |
申请号 |
US201213414331 |
申请日期 |
2012.03.07 |
申请人 |
KATO KAZUTOSHI;SUZUKI YOHEI;HOYA LENS MANUFACTURING PHILIPPINES INC. |
发明人 |
KATO KAZUTOSHI;SUZUKI YOHEI |
分类号 |
G02C7/00;G02B7/06;G02C7/02 |
主分类号 |
G02C7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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