KR20140122846A

KR20140122846A - Manufacturing method of Blue light-blocking lens produced by means of high vacuum thin layers

Info

Publication number: KR20140122846A
Application number: KR20130039782A
Authority: KR
Inventors: 윤철주
Original assignee: (주)옵티컴
Priority date: 2013-04-11
Filing date: 2013-04-11
Publication date: 2014-10-21

Abstract

The present invention relates to a spectacle lens which blocks a harmful short wavelength (380 to 500 nm) area emitted from an indoor light source such as a flat panel display, an LED, and other various digital devices and fluorescent lamps, The coating material having different refractive indexes is deposited in multiple layers to selectively reflect only the harmful short wavelengths. However, in order to uniformly recognize all colors naturally without distorting the color perception, a high vacuum deposition Type blue light blocking lens,
A concrete solution means of the present invention is that,
"Vacuum pressure reduction to 3.0 × 10 -5 Torr by using a vacuum pump on a hard film coated spectacle lens, atomic unit cleaning by lens etching using argon gas to maximize thin film adhesion, and then tungsten filament And then a uniform dielectric thin film of molecular unit is sequentially deposited on the spectacle lens by colliding with a target which is a dielectric material by an electron beam method using the generated thermoelectrics,
The hard film is made of silica having a refractive index ranging from 1.55 to 1.62 in a dip coating method for hard film strengthening on both the convex surface and the concave surface of the lens using a medium refractive or high refractive index lens having a refractive index of 1.5 to 1.7. Based coating material having a thickness of 2 to 3 占 퐉,
The dielectric but using ZrO ₂ of SiO ₂ and a high refractive index of the low refractive index, the refractive index is similar to that is, to use _{SiO 2, Al 2 O 3 (} n = 1.56) having a refractive index of 1.46 and so on, and also to the 2.06 refractive index ZrO ₂ and TiO ₂ (n = 2.2) in place becomes the arrangement order of the dielectric blocks blue light of a high vacuum deposition method, characterized in that the ever determining the deposition procedure according to the selected dielectric refractive index of the lens production process "for the constitutive or the like having By feature,
By using the interference effect of light, a coating material having different refractive indexes is deposited in multiple layers to selectively reflect harmful short wavelengths. However, it is possible to naturally recognize all colors evenly without distortion of color perception as a whole. The light transmittance is reduced to 95% in the entire visible light region (380 to 780 nm) while maintaining the ghost image reflected at each portion of the lens, that is, the eye of the lens, the afterimage of the fluorescent lamp, So that it is possible to maintain a pleasant and clear view, and it is possible to perceive all the colors as they are naturally by minimizing the distortion of the color perception, unlike the vacuum deposition method of simply raising the reflection of a short wavelength region.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a blue light-blocking lens manufactured by a high vacuum deposition method,

The present invention minimizes distortions in color perception of users by properly controlling the light transmittance of harmful short wavelengths (380 to 500 nm) emitted from various digital devices such as flat panel displays, LEDs, and indoor light sources such as three-wavelength fluorescent lamps and other sunlight And protects the user's eyes. It uses a light interference effect to deposit coating materials with different refractive indexes in multiple layers to selectively reflect only harmful short wavelengths. However, it can naturally recognize all colors evenly without distorting the color perception as a whole And more particularly, to a method of manufacturing a blue light blocking lens of a high vacuum deposition type in which distortion of color perception is minimized.

Electromagnetic radiation from the sun continues to flow into the Earth's atmosphere. Light is made up of electromagnetic radiation that travels in the form of waves. The electromagnetic spectrum includes radio waves, milliwaves, microwaves, infrared, visible, ultraviolet (UVA or UVB), x-rays, and gamma rays. The visible light spectrum includes the longest visible light wavelength of about 700 nm and the shortest visible light wavelength of about 380 nm (nanometers or 10 ^-9 meters). The blue light wavelength is in the range of about 380 nm to 500 nm. With respect to the ultraviolet band, the UVB wavelength ranges from 290 nm to 320 nm and the UVA wavelength ranges from 320 nm to 380 nm. Gamma rays and x-rays form higher frequencies of this spectrum and are absorbed in the atmosphere. The wavelength spectrum of ultraviolet light (UVR) is 100-380 nm. Most UVR wavelengths are absorbed in the atmosphere except where there is an ozone depletion zone in the stratosphere. Over the past two decades, ozone depletion has been recorded, mainly due to industrial pollution. UVR Increased exposure to UVR has a broad impact on public health, as it is expected to increase the burden of visual impairment and skin disease.

By absorbing the ozone layer to a wavelength of 286 nm, it prevents exposure of living things to radiation with the highest energy. However, we are exposed to wavelengths in excess of 286 nm, most of which fall within the human visible spectrum (380-700 nm). The human retina reacts only to the visible light portion of the electromagnetic spectrum. The shorter the wavelength, the greater the risk because they have more energy inversely proportional to the wavelength. Blue light is known to be responsible for most of the photochemical damage of RPE cells in animals in the visible spectrum. Exposure to these wavelengths is referred to as a blue light hazard because these wavelengths are perceived as blue in the human eye.

Cataracts and macular degeneration are widely known to result from photochemical damage of the intraocular lens and retina. Blue light exposure has been shown to accelerate the proliferation of uveal melanoma cells. The most active photons in the visible spectrum have a wavelength between 380 nm and 500 nm and are recognized as purple or blue. The wavelength dependence of the combined phototoxicity across all mechanisms suggests that the "mainstream" and "Sparrow" IOLs transmit a certain amount of blue light? British Ophthalmology Journal, 2003, v.87, pp. 1523-29 and the action spectrum as described in Fig. 6. In the case of eyes without an intraocular lens (eyes without a lens), light with a wavelength shorter than 400 nm may be damaged. In the case of eyes with a lens, such light does not contribute to the phototoxicity of the retina because it is absorbed by the intraocular lens. However, it may cause optical degradation of the lens or cataracts.

The pupil of the eye responds to the photopic retinal illuminance of the troland unit. The response is determined by the incident flux along with the sensitivity of the retina and the projected area of the pupil. These sensitivities are described in Wyszecki and Stiles, Color Science: Concepts and Methods, Concepts and Methods, Quantitative Data and Formula [Wiley: New York] 1982, pp. Lt; / RTI >

Current research strongly supports the premise that short-wavelength visible light (blue light) with a wavelength of about 380 nm to 500 nm can be one cause of AMD (old age macular degeneration). The highest level of blue light absorption is believed to occur near 430 nm, such as 380 nm - 460 nm. The study also suggests that blue light exacerbates other AMD factors such as genetics, smoking, and excessive drinking.

The human retina contains multiple layers. These layers are listed in order of their depth from the first exposure to light incident on the eye:

1) Nerve fiber layer

2) ganglion cells

3) my reticular layer

4) Bipolar neurons and horizontal cells

5)

6) Photoreceptors (rod cells and cone cells)

7) Retinal pigment epithelium (RPE)

8) Bruch's Membrane

9) Choroid

When light is absorbed by the photoreceptor cells of the eye (rod cells and cone cells), the cells become unable to accept light until they are bleached and recovered. This recovery process is a metabolic process and is referred to as a "visual cycle". The absorption of blue light has been shown to reverse this process too early. Early reversal is believed to increase the risk of oxidative damage and lead to the accumulation of pigment lipofusin in the retina. This accumulation occurs in the retinal pigment epithelium (RPE) layer. It is believed that excess lipofuscin forms aggregates of extracellular materials called drusen.

Recent research indicates that metabolic waste by-products accumulate in the pigment epithelium layer of the retina, beginning with infancy, due to the interaction of the retina and light. These metabolic waste byproducts are characterized by specific fluorophores, one of the most important being the lipofuscin component A2E. In vitro studies by Sparrow show that the lipofuscin chromophore A2E found in RPE is maximally excited by 430 nm light.

When accumulation of such metabolic waste (in particular, lipofusing fluorescent dye) continues and accumulates at a certain level, a tipping point is reached and when the human reaches a certain age limit, such waste is treated through metabolism in the retina The physiological ability of the human body to decline, and the theory that a drusen is formed in the RPE layer due to a blue light stimulus of a predetermined wavelength is established. Druggen thus formed is believed to contribute to age-related macular degeneration (AMD) by further interfering with normal physiological / metabolic activities that allow adequate nutrients to reach photoreceptors. In the United States and the West, AMD is the most important cause of serious irreversible vision loss. Due to the expected population shift and the overall increase in the aging population, the burden on AMD is expected to increase rapidly within the next 20 years.

Druggen causes damage or even death of these cells by preventing or blocking the RPE layer from providing proper nutrients to the photoreceptors. To explain this process more complicatedly, lipofuscin absorbs a large amount of blue light and becomes toxic, causing damage or death of RPE cells. The lipofusin component A2E is considered to be at least partly responsible for the short wavelength sensitivity of RPE cells. A2E has been found to be maximally excited by blue light; The resulting light-induced events as a result of this can cause cell death. For example, Janet Al. Janet R. Sparrow et al., "In Vitro Protection of Blue Light-absorbable IOL and Retinal Pigment Epithelium," J. Cataract Refract. Surg., 2004, vol.30, pp.873-78 .

From a theoretical point of view, the following events seem to occur.

1) Starting from infancy, the accumulation of waste throughout the lifetime occurs within the pigment epithelial level.

2) As age increases, the metabolic activity of the retina and the ability of the retina to treat these wastes typically decrease.

3) As age increases, macular pigment typically decreases, and thus the amount of filtered blue light decreases.

4) Blue light makes lipofuscin poisonous. This toxicity causes damage to the pigment epithelial cells.

The lighting and vision management industry has standards related to human vision exposure to UVA and UVB. Surprisingly, there is no such standard in relation to blue light. For example, in the case of ordinary fluorescent lamps that are available today, glass tubes block most of the ultraviolet light, while blue light is transmitted almost without damping. In some cases, the tube is designed to have enhanced transmittance in the blue range of the spectrum. These artificial light sources, which provide a light hazard, can also cause eye damage.

Experimental evidence presented by the University of Colombia's Spallow shows that blocking about 50% of the blue light in the 430 ± 30 nm wavelength range can reduce RPE cell death caused by blue light by up to 80%.

Exterior eyewear such as sunglasses, glasses, goggles, and contact lenses that block blue light as part of improving eye health are disclosed, for example, in US Pat. No. 6,955,430 to Pratt. Other ophthalmic devices having the purpose of protecting the retina from such phototoxic light include intraocular lenses and contact lenses. These ophthalmic devices are located in the optical path between the external light and the retina and generally contain or are coated with a dye that selectively absorbs blue light and purple light.

Other lenses are known for reducing chromatic aberration by blocking blue light. Chromatic aberration is caused by the optical dispersion of the ocular media, including the cornea, the intraocular lens, the aqueous humor, and the vitreous humor. This dispersion blurs the focus of the full color image by focusing the blue light to a different image plane than the longer wavelength light. Common blue intercept lenses are described in US Pat. No. 6,158,862 to Patel et al., US Pat. No. 5,662,707 to Jinkerson, US Pat. No. 5,400,175 to Johansen, U.S. Patent No. 4,878,748 to Johansen.

Conventional methods for reducing the exposure of the ocular medium to blue light typically completely block light below the threshold wavelength, but at the same time also reduce exposure to longer wavelength light. For example, the lens described in US Pat. No. 6,955,430 to Pratt, allows only less than 40% of the incident light at wavelengths as long as 650 nm, as shown in FIG. 6 of the Pratt '430 patent. Similarly, the blue light intercepting lens disclosed by Johansen and Diffendaffer in U.S. Patent No. 5,400,175 also discloses that 60% light is emitted over the entire visible spectrum, as illustrated in Figure 3 of the '175 patent. Or more.

Blocking and / or suppressing blue light affects the color range, the color vision (when an optical device is used), and the color of the optical device perceived by a person, It can be difficult.

For example, shooting glasses are light colored and block blue light. Shooting eyewear allows the shooter to see the target faster and more accurately by making certain colors appear more clearly when the user views the blue sky. This function may be suitable for shooting glasses, but may be unsuitable for many ophthalmic products.

In particular, such ophthalmic systems may not be aesthetically appealing due to the yellow or amber tones produced in the lens for blue interception. More specifically, as a general technique for blocking blue, a blue tint (tint) such as BPI Filter Vision 450 or BPI Diamond Dye 500 is used to tint the lens or to dye the lens There is a way. Coloring of the lens can be accomplished, for example, by immersing the lens in a heated dyeing vessel containing a blue blocking dye solution for a predetermined period of time. Typically, the dye solution imparts a yellow or amber hue to the lens because it is yellow or amber. For many people, the expression of such yellow or amber hues is aesthetically undesirable. Moreover, the color tone can hinder the lens user's normal color, for example, making it difficult to accurately recognize the color of a traffic light or a traffic sign.

Efforts have been made to supplement the yellowing phenomenon of the conventional blue blocking filter. For example, blue blocking lenses are treated with additional dyes such as blue, red, or green dyes to counteract the yellowing phenomenon. This treatment mixes the additional dye with the original blue blocking dye. However, such a technique may reduce yellow in a blue intercepting lens, but due to the mixing of the dyes, a greater portion of the blue light spectrum may pass and the blue blocking effect may be reduced. Moreover, these conventional techniques also reduce the overall transmittance for light of wavelengths other than the blue light wavelength, which is undesirable. This unwanted reduction eventually reduces the visual sharpness of the lens user.

Conventional blue-blockers have been found to reduce visible transmission and thereby expand the pupil. The dilation of the pupil increases the flux of light entering the intra-ocular structure, including the intraocular lens and the retina. Since the radiant flux incident on these structures increases in proportion to the square of the pupil diameter, a lens which blocks half of the blue light but at the same time decreases the visible transmittance and increases the diameter of the pupil by 2 mm to 3 mm, It will actually increase the amount of blue photons reaching the retina by 12.5%. Retinal protection from phototoxic light depends on the amount of light that interferes with the retina. The amount of light that interferes with the retina depends not only on the transmission properties of the ocular medium, but also on the dynamic aperture of the pupil. Studies to date have been silent about what pupil contributes to preventing phototoxic blue light.

Another problem with conventional blue-blocking is that it can degrade night vision. Blue is more important at low light levels or scotopic vision than bright light or photopic vision, which is a quantitative result in luminosity spectra for cows and spots. Photochemical and oxidative reactions naturally increase the 380-450 nm light absorption by the artificial lens tissue with age. Although the number of rod photoreceptors responsible for the field of view in dark environments diminishes with age, this absorption by the intraocular lens is an important cause of night vision decline. For example, cow sensitivity is reduced by 33% in a 53-year-old intraocular lens and by 75% in a 75-year-old intraocular lens. The tension between retinal protection and cow sensitivity is what makes the IOLs of the Mainster and Sparrow transparent to blue light? British Ophthalmology Journal, 2003, v.87, pp. 1523-29 and Fig. 6.

In addition, conventional approaches to blue interception include blocking filters or high-pass filters that reduce the transmittance of certain blue or violet to zero. For example, all light below the threshold wavelength can be completely or almost completely blocked. For example, U.S. Published Patent Application No. 2005/0243272, filed by Mainster, and the mainstay, "Intraocular lenses should block UV radiation and violet but not blue," Arch Ophthal., V. 123, p. 550 (2005) discloses that all light below a critical wavelength between 400 and 450 nm is blocked. This blocking may not be desirable because the long-

This is because as the edge of the long pass filter moves to longer wavelengths, the expansion of the pupil increases the total luminous flux. As described above, this can lower the cow sensitivity and increase the color distortion.

In the field of intraocular lenses (IOLs), controversy has recently arisen regarding the proper blocking of UV and blue light while maintaining acceptable spot, cow, color discrimination, and biological cycle rhythms.

The present invention minimizes the ghost image reflected on each part of the lens, that is, the eye reflected by the lens, the after-image of the fluorescent lamp, and the like, based on the background art as described above, It is possible to keep the light transmittance more than 95% in the region (380 ~ 780nm) and to maintain a pleasant and clear visual field. Unlike the vacuum evaporation method which only raises the reflection of only a short wavelength region, distortion of the color perception is minimized, The present invention provides a method for manufacturing a blue light blocking lens of a high vacuum deposition type.

In order to achieve the above object,

"Vacuum pressure reduction to 3.0 × 10 -5 Torr by using a vacuum pump on a hard film coated spectacle lens, atomic unit cleaning by lens etching using argon gas to maximize thin film adhesion, and then tungsten filament And then a uniform dielectric thin film of molecular unit is sequentially deposited on the spectacle lens by colliding with a target which is a dielectric material by an electron beam method using the generated thermoelectrics,

The hard film is made of silica having a refractive index ranging from 1.55 to 1.62 in a dip coating method for hard film strengthening on both the convex surface and the concave surface of the lens using a medium refractive or high refractive index lens having a refractive index of 1.5 to 1.7. Based coating material having a thickness of 2 to 3 占 퐉,

The dielectric but using ZrO ₂ of SiO ₂ and a high refractive index of the low refractive index, the refractive index is similar to that is, to use _{SiO 2, Al 2 O 3 (} n = 1.56) having a refractive index of 1.46 and so on, and also to the 2.06 refractive index as is done with the ZrO ₂ and TiO ₂ (n = 2.2) such as ever arrangement order of the dielectric determines the deposition procedure according to the selected index of refraction dielectric material,

Wherein the lens includes a color-changing lens capable of maintaining RGB color uniformity while minimizing distortion of the color perception, and a method of manufacturing a blue light-blocking lens of high vacuum deposition type. can do.

According to the present invention, the coating material having different refractive indexes is deposited in multiple layers by using the interference effect of light, so that only the harmful short wavelengths are selectively reflected, but all the colors can be naturally recognized evenly without distortion of the color perception as a whole It is possible to minimize the distortion of one color perception while minimizing the ghost image reflected on each part of the lens, that is, the eye of the lens itself, the afterglow of the fluorescent lamp, etc., while maintaining the short- ~ 780nm), it maintains a light transmittance of 95% or more and maintains a pleasant and clear visual field. Unlike the vacuum evaporation method which only raises the reflection of a short wavelength region, distortion of the color perception is minimized, will be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. It is of course possible to change and modify.

Hereinafter, the structure and operation of the blue light blocking lens of the high vacuum deposition system of the present invention will be described in detail.

In the concrete construction of the present invention,

"Vacuum pressure reduction to 3.0 × 10 -5 Torr by using a vacuum pump on a hard film coated spectacle lens, atomic unit cleaning by lens etching using argon gas to maximize thin film adhesion, and then tungsten filament To generate thermoelectrons in the filament and then collide with a dielectric target by an electron beam system using the generated thermoelectrons to uniformly deposit a dielectric thin film of molecular unit on the spectacle lens,

The hard film is made of silica having a refractive index ranging from 1.55 to 1.62 in a dip coating method for hard film strengthening on both the convex surface and the concave surface of the lens using a medium refractive or high refractive index lens having a refractive index of 1.5 to 1.7. Based coating material is coated with a thickness of 2 to 3 占 퐉,

The dielectric but using ZrO ₂ of SiO ₂ and a high refractive index of the low refractive index, the refractive index is similar to that is, to use _{SiO 2, Al 2 O 3 (} n = 1.56) having a refractive index of 1.46 and so on, and also to the 2.06 refractive index ZrO ₂ and TiO ₂ (n = 2.2), etc., and the dielectric arrangement order is determined by the refractive index of the selected dielectric material.

In the present invention, after the spectacle lens is placed in the chamber, vacuum decompression is performed up to 3.0 × 10 -5 Torr by using a vacuum pump, and atomic cleaning is performed by etching the lens using argon gas to maximize adhesion of the thin film Next, a high voltage is applied to the tungsten filament to generate thermoelectrons in the filament, and the generated thermoelectrons are collided with a dielectric target using an electron beam method using the generated thermoelectrons, thereby uniformly depositing a dielectric thin film of molecular unit on the spectacle lens.

The dielectric thin film deposited according to the present invention is particularly suitable for use in a spectacle lens using an existing ultraviolet absorber so that high reflection occurs at a wavelength of 380-500 nm which is insufficient in shielding and high transparency occurs at a wavelength of 500 nm or more, A dielectric thin film layer having a refractive index is deposited on the hard thin film in consideration of the reflection of ultraviolet wavelength band light and then a dielectric thin film layer having a high refractive index is deposited and then a dielectric thin film having a low refractive index and a high refractive index alternately Thereby forming a dielectric thin film layer sequentially.

At this time, a dielectric film having a uniform packing density and high durability is obtained in comparison with the case where an electron beam is used singly by controlling the amount of gas during the deposition and ionizing ionized oxygen.

Also, a dielectric thin film layer having a low refractive index and a dielectric thin film layer having a high refractive index are deposited on the hard film coated on the back surface of the concave surface of the lens in the same manner as in the convex surface, and then a low refractive index dielectric layer and a high refractive index dielectric thin film layer Are alternately deposited to form a dielectric thin film layer sequentially so that a thin film having a thickness designed to block short wavelengths in the ultraviolet wavelength band and high transmittance in the visible light band is formed by ion beam assisted deposition.

In the present invention, a thin film is deposited on a spectacle lens, which is a substrate, through the above process, and these thin films form a low reflection characteristic of high reflection and visible light wavelength bands in the ultraviolet wavelength band. The main factors are the choice of dielectric, the thickness of the dielectric film, and the order of the dielectric constants.

In the present invention, SiO _{2 having} a low refractive index and ZrO ₂ having a high refractive index are used as dielectric materials selected as an embodiment. Alternatively, other dielectric materials having similar refractive indices may be used. SiO ₂ , Al ₂ O ₃ (n = 1.56) having a refractive index of 1.46 or the like can be used as the dielectric usable. ZrO ₂ and TiO ₂ having a refractive index of 2.06 can also be used.

The arrangement order of the dielectric materials determines the deposition order according to the refractive index of the selected dielectric material, and the thickness of the dielectric material thin film is formed to a suitable thickness according to the thin film design

As a result of the selected dielectric, order and thickness of the dielectric selected through the above process, the dielectric multi-layer thin film without using the ultraviolet absorber was about 4% in the spectacle lens centered at 400 nm in the spectacle lens and in the spectacle lens without multilayer deposition in the visible ray band It can be seen that the transmittance is increased by reducing the surface reflection on one side to less than 2%. In the ultraviolet band, the ultraviolet reflectance reaches the maximum value in the wavelength range of 340 to 400 nm. Especially, when the ultraviolet absorbing agent It can be seen that the ultraviolet ray in the 380-400 nm band, which was ineffective in the ultraviolet shielding effect when used, has a high reflection, and the amount of transmission decreases sharply. That is, the reflectance of the wavelength band of 380 to 400 nm makes the reflectance of one side of the lens more than 65%, resulting in a total reflection of about 95% when both surfaces are dielectric deposited. As a result, the transmittance is 20% Or less.

As a result, the relationship between the transmittance and the wavelength of the present invention is graphically compared with the conventional lens No. 2 and the present invention No. 1

As described above, according to the present invention, coating materials having different refractive indexes are deposited in multiple layers using light interference to selectively reflect only harmful short wavelengths. However, in order to uniformly recognize all colors naturally without distorting the color perception, (380 ~ 780nm) while minimizing the ghost image reflected in each part of the lens, that is, the eye reflected by the lens, the afterimage of the fluorescent lamp, etc., while maintaining a certain level of short- The light transmittance is maintained at 95% or more to maintain a pleasant and clear visual field, and unlike the vacuum deposition method in which only the reflection of a short wavelength region is heightened, distortion of the color perception is minimized so that all colors can be recognized as they are,

More preferably, the lens includes a color-changing lens capable of maintaining RGB color uniformly while minimizing distortion on the color perception.

Claims

After vacuum decompression to 3.0 × 10 -5 Torr using a vacuum pump on a hard film coated spectacle lens, atomic cleaning was performed by etching the lens using argon gas to maximize thin film adhesion, and then the tungsten filament A high voltage is applied to generate thermoelectrons in the filament, and the generated thermoelectrons are collided with a dielectric target by an electron beam system using the generated thermoelectrons, thereby uniformly depositing a dielectric thin film of a molecular unit on the spectacle lens. / RTI >

The method according to claim 1,
The hard film is made of silica having a refractive index ranging from 1.55 to 1.62 in a dip coating method for hard film strengthening on both the convex surface and the concave surface of the lens using a medium refractive or high refractive index lens having a refractive index of 1.5 to 1.7. Layer coating material is coated to a thickness of 2 to 3 占 퐉.

The method according to claim 1,
The dielectric but using ZrO ₂ of SiO ₂ and a high refractive index of the low refractive index, the refractive index is similar to that is, to use _{SiO 2, Al 2 O 3 (} n = 1.56) having a refractive index of 1.46 and so on, and also to the 2.06 refractive index Wherein the order of the dielectric layers is determined according to the refractive index of the selected dielectric material, and ZrO ₂ and TiO ₂ (n = 2.2).

The method according to claim 1,
Wherein the lens comprises a color-changing lens capable of uniformly maintaining and displaying R, G, and B colors while minimizing distortion on the color perception.