Multi-layered gradient index progressive lens

A gradient refractive index, refractive index technology, applied in the field of gradient refractive index gradient multifocal lenses

Inactive Publication Date: 2010-03-24
唐纳德·A·沃尔克
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This lens has many limitations that are typical of the characteristics of an aspheric progressive lens

Method used

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  • Multi-layered gradient index progressive lens
  • Multi-layered gradient index progressive lens
  • Multi-layered gradient index progressive lens

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Embodiment Construction

[0065] The following is a disclosure of how to make and use the claimed invention, including the best mode known to the inventor for carrying out the claimed invention in effect on the filing date.

[0066] refer to Figure 1a , 1b and 1c, three doublet lens configurations of the first exemplary lens constructed in accordance with the disclosed concepts are shown. Figure 1a -c shows three possible lens shapes. In general, the front lens portion A includes the gradient index layer and the back portion B generally includes the constant index layer of the lens. "Anterior" refers to a front position and is further from the eye, and "Rear" refers to a rear position and is closer to the eye. Section A has positive optical power and section B has negative optical power. In this embodiment, the refractive index increases through the progressive intermediate vision portion of the lens from the distance vision portion to the near vision portion, thereby providing progressively incr...

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Abstract

The present invention relates to a gradient index progressive addition spectacle lens that provides improved optical performance and a wide visual field. The lens comprises a plurality of axially layered and bonded lens sections of continuous curvature at least one of which has a refractive index gradient oriented transverse to a meridian of the lens that functions as a progressive intermediate vision zone between viewing portions of different refractive index that provide the refractive powers for corresponding vision portions of the lens. The other layer(s) of the lens incorporates a generally constant or similarly changing refractive index.

Description

[0001] This application claims priority to US Provisional Application Serial No. 60 / 854,469, filed October 24, 2007. technical field [0002] The present invention relates to a gradient index progressive multifocal ophthalmic lens that provides improved optical performance and a wide field of view. The lens comprises a plurality of axially layered and bonded lens sections having a continuous curvature, wherein at least one lens section has a refractive index gradient oriented transverse to the lens meridian acting as a viewing section having a different refractive index The effect of the graded intermediate vision zone between the different refractive index viewing portions is to provide refractive power to the corresponding vision portion of the lens. The other layer(s) of the lens contain a substantially constant or similarly varying refractive index. Background technique [0003] Progressive multifocal lenses are vision aids used to deal with hyperopia, a condition in wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06
CPCG02C2202/16G02C2202/12G02C7/061
Inventor 唐纳德·A·沃尔克
Owner 唐纳德·A·沃尔克
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