MULTIFOCAL LENS HAVING A PROGRESSIVE OPTICAL POWER REGION AND A DISCONTINUITY |
|||||||
| 申请号 | PCT/US2008058930 | 申请日 | 2008-03-31 | 公开(公告)号 | WO2008121975A4 | 公开(公告)日 | 2009-01-22 |
| 申请人 | PIXELOPTICS INC; BLUM RONALD D; KOKONASKI WILLIAM; IYER VENKATRAMANI S; HADDOCK JOSHUA N; SHUPNICK MARK-MATTISON; | 发明人 | BLUM RONALD D; KOKONASKI WILLIAM; IYER VENKATRAMANI S; HADDOCK JOSHUA N; SHUPNICK MARK-MATTISON; | ||||
| 摘要 | Embodiments of the present invention relate to a multifocal lens having a diffractive optical power region and a progressive optical power region. Embodiments of the present invention provide for the proper alignment and positioning of each of these regions, the amount of optical power provided by each of the regions, the optical design of the progressive optical power region, and the size and shape of each of the regions. The combination of these design parameters allows for an optical design having less unwanted astigmatism and distortion as well as both a wider channel width and a shorter channel length compared to conventional PALs. Embodiments of the present invention may also provide a new, inventive far-intermediate distance zone and may further provide for increased vertical stability of vision within a zone of the lens. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈