New type lens, fabricating technique, and fabrication die

A new type of mold technology, applied in the field of lenses, can solve the problems of loose film mirror, film mirror falling off, impact and so on

Inactive Publication Date: 2007-05-09
胡允楷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When in use, after cutting the film mirror with the shape of the original spectacle lens as a template, pasting the film mirror and the spectacle lens together with a medium can also achieve the purpose of correcting ametropic eyesight, but after attaching, the gap between the film mirror and the original lens The existence of medium affects the transmittance of the lens, and the wearer has the feeling of seeing flowers in the fog. In addition, the existing film lens is a flat single focal length (myopia, hyperopia) structure, which can only meet the needs of patients with high myopia and high hyperopia. If the lens has astigmatism (double focal length), the degree of astigmatism must be processed on the original spectacle lens. Pasting the film mirror on the astigmatism surface will not be firm, and the film mirror will fall off when the glasses are cleaned. In addition, the film mirror is made of soft PVC material. After hardening treatment, the surface has poor wear resistance and is easy to scratch the lens. These irresistible factors bring a lot of inconvenience to the wearer

Method used

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  • New type lens, fabricating technique, and fabrication die
  • New type lens, fabricating technique, and fabrication die
  • New type lens, fabricating technique, and fabrication die

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Experimental program
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Embodiment Construction

[0111] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0112] The present invention is a new type of thin lens, which is processed by integral molding technology, which includes a spherical lens part and a Fresnel prism part, the spherical lens part is arranged at the front part, and the Fresnel prism part set at the rear.

[0113] PMMA

PC

Density (1×10 3 kg / m 3 )

1.191

1.2

Refractive index (n)

1.491

1.5872

Transmittance

92-93％

85-90％

Abbe number

57.53

58

[0114] Please refer to Fig. 1, shown in Fig. 2, it is respectively the side view and the front view of the preferred embodiment one of novel lens of the present invention, and it is a kind of myopia mirror (concave lens), and it comprises spherical mirror part and Fresnel prism part , the thickne...

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PUM

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Abstract

A new type of thin lens consists of spherical lens being set at front and Fresnel prism being set at back. The process and mode both for preparing said lens are also disclosed.

Description

technical field [0001] The invention relates to a new type of lens, in particular to a thin lens processed by Fresnel prism principle, processing technology and processing mold. Background technique [0002] The spectacle lenses currently available in the market are all designed and produced according to the traditional spherical lens theory. The lens luminosity is determined by the difference (algebraic sum) between the curvature of the front surface and the curvature of the rear surface, the refractive index of the material, and the thickness of the center of the lens. [0003] The luminosity of the lens is inversely proportional to the radius of curvature R, that is, the higher the degree, the larger the curvature, and the smaller the radius. In this way, the edge of the highly myopic lens (concave lens) is very thick, and the center of the highly hyperopic lens (convex lens) is very thick. Lenses that are too thick bring a lot of trouble to the wearer. Although this sit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00B29C45/26B29C43/36B23P15/24B29D11/00
Inventor 胡允楷黄金柱
Owner 胡允楷
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