发明授权
- 专利标题: Progressive addition lens operating in combination with a multi-order diffractive optic
- 专利标题(中): 与多级衍射光学元件结合操作的渐进加法透镜
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申请号: US12118226申请日: 2008-05-09
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公开(公告)号: US07654667B2公开(公告)日: 2010-02-02
- 发明人: Ronald D. Blum , William Kokonaski , Joshua N. Haddock
- 申请人: Ronald D. Blum , William Kokonaski , Joshua N. Haddock
- 申请人地址: US VA Roanoke
- 专利权人: PixelOptics, Inc.
- 当前专利权人: PixelOptics, Inc.
- 当前专利权人地址: US VA Roanoke
- 代理机构: Townsend and Townsend and Crew LLP
- 主分类号: G02C7/06
- IPC分类号: G02C7/06
摘要:
A multi-focal spectacle lens is presented having far distance, intermediate distance, and near distance vision correction, in which the lens includes a progressive addition surface with a progression of optical power. The lens further includes a multi-order diffractive surface relief structure with an optical add power. The multi-order diffractive structure reduces chromatic aberration as compared to a conventional diffractive structure of equivalent optical power. The lens may also include a wavefront splitting device diffractive structure for generating multiple optical powers simultaneously. When the progressive addition surface and the multi-order diffractive surface relief structure are in optical communication an overall progression of optical add power may be provided by the combination of the progressive addition surface with the multi-order surface relief diffractive structure.
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