发明申请
- 专利标题: Diffractive lenses for vision correction
- 专利标题(中): 用于视力矫正的衍射镜
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申请号: US11180818申请日: 2005-07-13
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公开(公告)号: US20060055883A1公开(公告)日: 2006-03-16
- 发明人: G. Morris , Dale Buralli , Richard Federico
- 申请人: G. Morris , Dale Buralli , Richard Federico
- 主分类号: G02C7/06
- IPC分类号: G02C7/06
摘要:
Diffractive lenses for vision correction are provided on a lens body having a first diffractive structure for splitting light into two or more diffractive orders to different focal distances or ranges, and a second diffractive structure, referred to as a multiorder diffractive (MOD) structure, for diffracting light at different wavelengths into a plurality of different diffractive orders to a common focal distance or range. In a bifocal application, the first and second diffractive structures in combination define the base power for distance vision correction and add power for near vision correction of the lens. The first and second diffractive structures may be combined on the same surface or located on different surfaces of the lens. The first diffractive structure may have blazed (i.e., sawtooth), sinusoidal, sinusoidal harmonic, square wave, or other shape profile. A sinusoidal harmonic diffractive structure is particularly useful in applications where smooth rather than sharp edges are desirable.
公开/授权文献
- US07156516B2 Diffractive lenses for vision correction 公开/授权日:2007-01-02
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