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Ophthalmic lens and process for manufacturing such a lens

一种制造方法、负眼镜片的技术，应用在眼镜/防护镜、眼镜/护目镜、制造工具等方向，能够解决降低佩戴者视觉舒适度等问题

Inactive Publication Date: 2015-09-30
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such materials generally have considerable dispersion capabilities, which may reduce the wearer's visual comfort, such as the perception of colored streaks

Method used

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  • Ophthalmic lens and process for manufacturing such a lens
  • Ophthalmic lens and process for manufacturing such a lens
  • Ophthalmic lens and process for manufacturing such a lens

Examples

Experimental program
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Embodiment Construction

[0054] figure 1 An additive manufacturing machine 1 that can be used in the context of the present invention is shown.

[0055] By way of non-limiting example, the following description given with respect to the accompanying drawings will allow an understanding of what constitutes the invention and how it can be carried out.

[0056] This additive manufacturing machine 1 comprises a command / control unit 2 , a first nozzle 13 , a second nozzle 14 and a manufacturing support member 12 on which an ophthalmic lens 10 is to be manufactured by an additive manufacturing method as described below.

[0057] The additive manufacturing machine 1 also comprises the aperture 6 , covered here during the manufacturing phase by a movable shield, thereby allowing the ophthalmic lens 10 to be obtained on the manufacturing support member 12 after being manufactured by the additive manufacturing method.

[0058] The manufacturing support member 12 comprises a body with manufacturing surfaces hav...

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Abstract

A process for manufacturing a negative ophthalmic lens comprising a central portion (50) and a peripheral portion (52) comprises the following steps: forming the central portion (50) by forming voxels of a first material having a first refractive index, the central portion having a zone at its periphery; and forming the peripheral portion (52) from said zone and contiguous to the perimeter of said zone, by forming voxels of at least one second material having a second refractive index, the second refractive index being strictly higher than the first refractive index.

Description

technical field [0001] The present invention generally relates to optics for correcting refractive errors. [0002] It relates more particularly to a negative ophthalmic lens intended to correct myopia and to a method for the manufacture of such a lens. Background technique [0003] Ophthalmic lenses (eg spectacle lenses) used to treat myopia conventionally have a concave surface in the center of these lenses to diverge the light rays, thereby compensating for the rapid convergence of the latter in the eyes of myopic individuals. [0004] The thickness of these lenses thus increases with distance from the center of the lens and can reach a thickness of several millimeters at the periphery of the lens, especially when strong corrections are required. [0005] Such a peripheral thickness presents both aesthetic and functional problems, especially in the case of spectacle lenses carried by a spectacle frame. [0006] In order to reduce this thickness, one solution consists in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/02B29C67/00B33Y10/00
CPCB41J2/01G02C2202/24G02C2202/16B29D11/00048B33Y10/00G02C7/022B33Y80/00B33Y70/00G02C7/06B29D11/00355B29C67/0051G02B3/0087G02C5/001B29D11/00028B29L2011/0016B29D11/00432B29C64/112
Inventor B·格朗热G·巴耶
Owner ESSILOR INT CIE GEN DOPTIQUE
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