Diffractive multi-focal ocular lens and method for manufacturing diffractive multi-focal ocular lens

An ophthalmic lens, multi-focal technology, applied in the direction of glasses/protective glasses, glasses/goggles, intraocular lens, etc., can solve problems such as halo

Active Publication Date: 2018-06-08
MENICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, since lights and the like that reinforce each other at other focus positions also reach the image plane position of the far focus, there are small peak groups caused by multi-order light around the main peak forming the far focus in the image plane of the far focus, which may cause cause halo

Method used

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  • Diffractive multi-focal ocular lens and method for manufacturing diffractive multi-focal ocular lens
  • Diffractive multi-focal ocular lens and method for manufacturing diffractive multi-focal ocular lens
  • Diffractive multi-focal ocular lens and method for manufacturing diffractive multi-focal ocular lens

Examples

Experimental program
Comparison scheme
Effect test

example 8

[0203] Simulation as a contact lens

[0204] The eye optical system is arranged in the order of contact lens, cornea, aqueous humor, iris, lens, vitreous body, and retina, and determines the refractive index and shape based on human eye data. In addition, determine the refractive power and pupil diameter of the contact lens as described below.

[0205] Contact lens 0th order diffracted light refraction degree (diopter): 0D

[0206] Pupil diameter: diameter 3.8mm

[0207] In addition, like the simulation of the intensity distribution on the optical axis, the simulation related to the above-mentioned point spread function was also performed with an incident light wavelength of 546 nm, and the light source was a point light source at an infinite distance.

[0208] During an example-based explanation of a specific example of the present invention obtained based on the method and conditions of computational simulation as described above, an overview of the structure and character...

example 1

[0230] Example 1 based on the present invention is shown below. The inventive distribution of Example 1 has the aforementioned Table 1 and Figure 7 Distribution shown in A. At the same time, Comparative Example 1 for Table 1 and Figure 5 Each region in the standard distribution shown in A has a phase constant of h = 0.6, and in Table 2 and Figure 7 In A, the standard distribution as Comparative Example 1 is shown by a dotted line.

[0231] Table 2

example 2

[0241] Example 2 shows another pattern related to Example 1. The radius of the constituent region of the standard distribution of Comparative Example 2 is the same as that of Comparative Example 1, but as shown in Table 3 and Figure 8 As shown in A, reset the phase constant and phase shift of the blaze. The intensity distribution on the optical axis of the standard distribution used in Comparative Example 2 is given by Figure 8 The dotted line in B shows. As in Comparative Example 1, the standard distribution of Comparative Example 2 generates peaks at 0D, 3D, and 4D positions. For Comparative Example 2, the standard distribution itself has almost no generation of multi-order light, and compared with Comparative Example 1, the 0D peak intensity for hyperopia is increased. The standard distribution of Comparative Example 2 can also be a multifocal ophthalmic lens in which hyperopia, myopia and intermediate vision are feasible. However, for this comparative example 2, the ...

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PUM

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Abstract

The present invention pertains to a diffractive multi-focal ocular lens, and the purpose is to provide a novel structure and manufacturing method in which improvement in optical characteristics such as halo reduction is ensured. A diffractive multi-focal ocular lens in which a plurality of focal points have been set by a diffraction grating composed of blazed phase functions in which a plurality of zone sequences are superimposed, wherein a structure is used in which the slope of a blaze of a specific adjustment zone in a reference profile is expressed by an inverse phase function.

Description

technical field [0001] The present invention relates to an ophthalmic lens, such as a contact lens, an intraocular lens, etc., which is used for the human eye and exhibits a corrective action etc. on the optical system of the human eye, and particularly relates to a diffractive multifocal for setting a plurality of focal points Ophthalmic lens technology. Background technique [0002] Conventionally, ophthalmic lenses have been used as optical elements for correcting refractive anomalies in the human eye optical system, or as replacement optical elements after removal of a crystalline lens, or the like. As specific ophthalmic lenses, in addition to spectacle lenses, there are contact lenses superimposed on the cornea, or ophthalmic lenses that are directly installed in the human eye, such as intraocular lenses (IOL) that are inserted into the capsule and used instead of intraocular lenses , or phakic intraocular lenses (ICL), etc., which are used by being inserted into the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/06G02C7/04
CPCA61F2/1656G02C7/042A61F2002/1696G02C2202/20G02C7/06G02C7/044
Inventor 安藤一郎
Owner MENICON CO LTD
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