Invention Grant
- Patent Title: Progressive-power lens and progressive-power lens design method
- Patent Title (中): 渐进式功率透镜和渐进式透镜设计方法
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Application No.: US13414331Application Date: 2012-03-07
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Publication No.: US08684522B2Publication Date: 2014-04-01
- Inventor: Kazutoshi Kato , Yohei Suzuki
- Applicant: Kazutoshi Kato , Yohei Suzuki
- Applicant Address: PH Cavite
- Assignee: Hoya Lens Manufacturing Philippines Inc.
- Current Assignee: Hoya Lens Manufacturing Philippines Inc.
- Current Assignee Address: PH Cavite
- Agency: DLA Piper LLP (US)
- Priority: JP2011-049921 20110308
- Main IPC: G02C7/00
- IPC: G02C7/00 ; G02C7/02 ; G02B7/06

Abstract:
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.
Public/Granted literature
- US20120229757A1 Progressive-Power Lens and Progressive-Power Lens Design Method Public/Granted day:2012-09-13
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