JP3237848U - Eyeglasses and sunglasses with lenses that have a near-infrared cut function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide eyeglasses and sunglasses capable of suppressing wrinkles and sagging around the eyes by wearing them. SOLUTION: The lens 1 is provided with a lens 1 on a front portion, and an infrared ray 4 is attached to both sides of the front portion, and a vine 5 is foldably connected to the infrared ray 4 to form eyeglasses or sunglasses, which constitutes the front portion of the eyeglasses. Adds tungsten cesium oxide to polycarbonate in a weight ratio of 0.2% to 0.6%, and injection-molds a material that is sufficiently kneaded with this into a mold to transmit near-infrared rays that pass through the lens 1. Can be cut by 80% to 99% over almost the entire area. [Selection diagram] Fig. 1

Description

The present invention relates to spectacles equipped with a lens having a high visible light transmittance, a bright light, and a near-infrared ray blocking function.

When adding functionality to a spectacle lens, a coating method of depositing on the surface is generally used. What is thin-film deposition? The thin-film deposition material, which is formed by heating and vaporizing the vapor-film deposition material and sublimating it into gas molecules, adheres to the lens surface to form a thin-film deposition film.
Therefore, heat of several hundred degrees or more is applied to the surface of the lens, and the function added to the lens is impaired. That is, the function of cutting near infrared rays, which is one of the objects of the present invention, is limited.
Near infrared rays have a wavelength range of 700 nm to 2500 nm and reach deeper into the skin than ultraviolet rays, which causes wrinkles and sagging around the eyes.

There is also a method of adding a near-infrared ray cutting material to the lens itself, but when the near-infrared ray cutting rate is increased, there is a problem that the visible light transmittance decreases and the color of the lens itself becomes darker. Moreover, the material of the lens is also limited.
In addition, a lens that adds a near-infrared cut function by coating is also known, but when coated, there is a problem that the near-infrared cut rate is as low as about 50% and the service life of the coating is relatively short. ..

On the other hand, it is also possible to construct a lens having a near-infrared ray cutting function by attaching a predetermined functional film to the lens surface with an adhesive. However, the adhesion of the film attached to the lens surface is poor, and the film peels off after many years, and there is a problem that the film peels off when cutting from a circular lens base material to a lens having a predetermined outer shape. be.

Conventionally, a lens that cuts near infrared rays is known.
For example, the "near-infrared cut lens and spectacles provided with the near-infrared cut lens" according to Utility Model Registration No. 3221319 is a lens having an excellent near-infrared cut effect and a stable effect.
That is, it is a lens formed of a synthetic resin containing SDO-CI2, which is a near-infrared control agent manufactured by Arimoto Chemical Industry Co., Ltd., and magnesium steerate in a weight ratio of 1/1.

The "transmissive resin base material" according to Patent No. 5166482 is a spectacle lens formed by injection molding a molten resin into a mold, and the resin is a polycarbonate, 800 nm with respect to 100 kg of the resin. A phthalocyanine dye having a minimum value of a spectral transmittance curve with a transmittance of less than 10% in the wavelength range of about 850 nm, and a spectral transmittance curve having a transmittance of less than 10% in the wavelength range of 950 nm to 1000 nm. A phthalocyanine dye having a minimum value and a phthalocyanine dye having a minimum value of a spectral transmittance curve with a transmittance of less than 10% in the wavelength range of 875 nm to 925 nm are in the weight range of 0.1 ppm to 50 ppm, respectively. It is formed by mixing, melting with the resin, and injecting.

The "method for producing a translucent resin base material, a translucent resin base material and a translucent molded body" according to JP-A-2016-200626 has high infrared shielding properties using ITO or ATO, and is a spectacle lens. It is a method for producing a translucent resin base material that can be applied to a translucent molded body that requires high translucency such as.
That is, the near-infrared absorber is added to the resin base material, and the white turbidity due to the addition of the near-infrared absorber is suppressed at a preset film thickness so as to have a visible light transmittance of 75% or more in a colorless and transparent state. There is a method of adding a yellow pigment to the resin.
ITO or ATO can be used as the near-infrared absorbing agent, and the transmittance of near-infrared rays in the wavelength region of 1600 nm to 1700 nm is 5% or less, and the transmittance of near-infrared rays in the wavelength region of 1700 nm to 2500 nm is 2% or less. be able to.

However, the "translucent molded product" according to Japanese Patent Application Laid-Open No. 2016-200626 cannot cut the entire wavelength range of 700 nm to 2500 nm, which is a near-infrared region. In particular, a region having a short wavelength is transmitted.
"Near-infrared cut lens and eyeglasses equipped with it" according to Utility Model Registration No. 3221319 "Translucent resin base material" according to Japanese Patent No. 5166482 "Method for manufacturing a translucent resin base material, a translucent resin base material and a translucent molded product" according to JP-A-2016-200626.

To protect the eyes, eyeglasses that can block near infrared rays are used. Although ITO and ATO are used as the near-infrared absorber, a certain amount is mixed with the resin, which impairs the transparency of the lens. There is also a problem in the wavelength region through which near infrared rays are transmitted.
The problem to be solved by the present invention is these problems, and an eyeglass equipped with a lens capable of shielding near-infrared rays by using tungsten cesium oxide as a near-infrared absorbing material and adding this to polycarbonate is provided.

The spectacles according to the present invention have a function of shielding (cutting) near infrared rays, and are injection-molded by being contained in polycarbonate which is a base material of a lens. Instead of a structure in which a film with a near-infrared function is attached to the lens surface, a near-infrared shielding agent is screwed into polycarbonate, which is the base material of the lens.
In the present invention, cesium tungsten oxide (CWO) is used as a near-infrared shielding agent. The content of the cesium tungsten oxide (CWO) is 0.2% to 0.6% by weight with respect to the polycarbonate.
Polycarbonate is suitable as the lens base material, but acrylic, PET, CR39 and the like may be used.

The lens substrate formed by kneading tungsten cesium oxide (CWO) with polycarbonate has both high transmittance of visible light and strong shielding ability against near infrared rays. Tungsten cesium oxide (CWO) has a wavelength of around 800 to 1200 nm, which occupies a large amount of energy in the sun's rays, compared to indium tin oxide (ITO) and tin antimony oxide (ATO), which are known as infrared shielding materials. It shields and absorbs more strongly.
The circular molded lens extruded into the mold and having a predetermined curvature is cut into a predetermined shape so as to fit into the rim constituting the front portion of the spectacles.

The spectacles according to the present invention are formed by kneading the lens with tungsten cesium oxide (CWO) into polycarbonate and have a high transmittance of near infrared rays, so that the visibility is not impaired even if the spectacles are worn. do not have. In addition, it has a high effect of shielding near infrared rays, and can reach deeper into the skin than ultraviolet rays to suppress wrinkles and sagging around the eyes.

The lens of the spectacles according to the present invention is not attached with a film having a near-infrared shielding function, but is formed by kneading a very small amount of tungsten cesium oxide (CWO) with polycarbonate, so that the manufacturing cost of the lens is reduced. Become cheap.
In addition, there is no problem that the film is peeled off or scratched, and the life of the lens is extended.

An example showing a general metal eyeglass frame. (A) is a circular lens base material, and (b) is a lens that fits on the rim of the eyeglass frame. Test results of "ultraviolet transmittance" and "visible light transmittance" based on the Household Goods Quality Labeling Law. Test results of "near infrared transmittance" based on Japanese Industrial Standards (JIS T 8141: 2016). Test results of "near infrared transmittance" based on the American National Standard (ANSI Z80.3: 2018). The graph which shows the near-infrared ray shielding rate (cut rate) of the lens which concerns on this invention.

The lenses constituting the spectacles according to the present invention are not only prescription lenses for correction, but also polarized lenses and photochromic lenses. Then, the spectacle lens is fitted to the rim provided on the front portion, or is configured as a nyroll frame and is held by the upper rim and the water thread, and further directly to the connecting member arranged in the center without using the rim and the water thread. It is screwed.

FIG. 1 shows a general spectacle frame, in which 1 is a lens, 2 is a rim, 3 is a connecting member, 4 is a twist, and 5 is a vine. Both rims 2 and 2 are brazed to both sides of the central connecting member 3, and twists 4 and 4 are brazed to the outside of the rims 2 and 2, and the hinges 6 and 6 are attached to the twists 4 and 4. The vines 5 and 5 are connected so that they can be folded. The lenses 1 and 1 according to the present invention are fitted in the rims 2 and 2.

By the way, the lens 1 is made of polycarbonate, to which tungsten oxide (CWO) is added in a weight ratio of 0.2% to 0.6%, kneaded sufficiently, and injected into a mold. It is molded. As shown in FIG. 2A, the molded lens base material 7 has a circular shape having a predetermined outer diameter, and the surface and the inner surface have curved surfaces curved with a predetermined curvature.
Here, polycarbonate is suitable for the lens base material 7, but a plastic material suitable for the lens such as acrylic, PET, and CR39 is used.
Then, the outer peripheral portion of the lens base material 7 is cut and processed into a lens 1 that fits into the rim 2 as shown in (b).

The above-mentioned tungsten oxide (CWO) has a high transmittance of visible light and a strong absorption capacity for near infrared rays. Therefore, the lens 1 formed by using the polycarbonate added with this cesium tungsten oxide (CWO) can block light having a wavelength in the vicinity of 800 to 1200 nm, which occupies the most energy in the sun's rays.
Therefore, if the eyeglasses fitted with the lens 1 of the present invention are worn, wrinkles and sagging around the eyes can be suppressed, and the skin can be kept youthful and firm forever.

FIG. 3 shows the test results of "ultraviolet ray transmittance" and "visible light transmittance" based on the Household Goods Quality Labeling Law.
In the "ultraviolet transmittance" of the lens 1, "313 nm" and "365 nm" are both 0%, and the "visible light transmittance" is 62.7%.

FIG. 4 shows the test results of "near infrared transmittance" based on the Japanese Industrial Standards (JIS T 8141: 2016).
The "near infrared transmittance (780 nm to 1300 nm)" of the lens 1 is 12.4%.
That is, 87.6% of the near infrared rays of the light passing through the lens 1 are cut.

FIG. 5 shows the test results of "near infrared transmittance" based on the American National Standard (ANSI Z80.3: 2018).
The "near infrared transmittance (780 nm to 1400 nm)" of the lens 1 is 14.0%.
That is, 86% of the near infrared rays of the light passing through the lens 1 are cut.

FIG. 6 is a graph showing the near-infrared ray shielding rate of the lens 1 according to the present invention, in which the horizontal axis represents the wavelength of light and the vertical axis represents the transmission of near-infrared rays. As is clear from the figure, in the wavelength range of 450 nm to 800 nm, the transmittance of near infrared rays is relatively high, but in the range of 900 nm to 900 nm, the near infrared rays are shielded and the transmittance is low.
In this way, the lens according to the present invention can suppress spots and sagging around the eyes by cutting the transmittance of the entire near-infrared ray.

1 Lens 2 Rim 3 Connecting member 4 Yoroi 5 Crane 6 Hinge 7 Lens base material

Claims (1)

In eyeglasses and sunglasses that have a lens on the front part, and Yoroi is attached to both sides of the front part, and the vines are foldably connected to the Yoroi, the above lens is a plastic lens material such as polycarbonate, acrylic, PET, CR39. Tungsten oxide of cesium is added in a weight ratio of 0.2% to 0.6%, and a material that is sufficiently kneaded with this is injection-molded into a mold, and 80% of near-infrared rays transmitted through the lens are emitted over almost the entire area. Eyeglasses and sunglasses fitted with lenses that have a near-infrared cut function, which is characterized by cutting up to 99%.

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