JP2930964B2 - Eyeglass lens - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a spectacle lens for protecting eyes from radiation.

<Background Art> When a living tissue is exposed to radiation, the living tissue absorbs these radiations. Its absorption characteristics vary depending on the wavelength of the radiation and the site of the living tissue, but in the tissues of the eye, visible light that is part of the radiation passes through the cornea, iris, lens,
It reaches the retina and choroid. It is known that eye tissues can cause heavy and persistent damage to the iris, retina, choroid, etc. when exposed to prolonged or intense visible light. On the other hand, ultraviolet rays, which are part of the radiation,
Well absorbed by the lens. It has been suggested that exposure of eye tissue to prolonged or intense ultraviolet light is a cause of electro-ophthalmitis and a distant cause of cataracts.

The effect of radiation on eye tissue is less likely to cause damage to eye tissue for people exposed to prolonged or intense radiation, such as pilots, compared to living conditions under normal sunlight. Easy to wake up. For people who have been exposed to such prolonged or intense radiation, it is preferable to wear environmentally friendly spectacle lenses to protect the eyes from radiation.

As a spectacle lens for protecting eyes from radiation, for example, in JP-A-62-254119, a synthetic resin lens obtained by adding an ultraviolet absorber to a monomer containing diethylene glycol bisallyl carbonate as a main component and then polymerizing the same. Has been proposed, which is dyed into a gray or brown color using a disperse dye, and a coating film is formed on the surface of the lens to shield ultraviolet rays and reduce visible light and infrared rays.

<Problems to be Solved by the Invention> However, the spectacle lens proposed in Japanese Patent Application Laid-Open No. 62-254119 is required to protect the eyes from radiation by blocking ultraviolet rays and reducing visible light and infrared rays. Although it is full, the dimming of light in the wavelength range of 620 to 670 nm is 450 to 620 nm
Illuminated objects using various light sources, such as tungsten lamps, fluorescent lamps, halogen lamps, etc., as viewed through the spectacle lens, transmission indicator lamps, self-luminous indicator lamps, etc. There is a problem that the color is distinguished from the color seen with the naked eye.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to protect a human eye in an environment exposed to prolonged or intense radiation, to provide a tungsten lamp, a silicon lamp. An object of the present invention is to provide a spectacle lens capable of distinguishing the color of an illuminated object using various light sources such as a light lamp and a halogen lamp, a transmissive display lamp, a self-luminous display lamp and the like to the same color as seen with the naked eye. .

<Means for Solving the Problems> The above-mentioned problem is solved by adding a UV absorber to a synthetic resin monomer and then polymerizing the synthetic resin lens to obtain (a) a Turqus blue-based disperse dye, The problem was solved by a spectacle lens characterized in that two or more disperse dyes selected from orange-based, yellow-based and red-based disperse dyes were used to dye brown or gray tones.

In the present invention, examples of the monomer for synthetic resin include those having diethylene glycol bisallyl carbonate as a main component, but other monomers such as acrylates can be used as long as they form a plastic lens by polymerization.

In the present invention, as the ultraviolet absorber added to the monomer for a synthetic resin lens, 2,2'-dihydroxy-4-
Methoxybenzophenone is particularly preferred, and the amount used is based on the amount of monomer as the main component of the synthetic resin lens material.
Preferably from 0.01% to 4% by weight, particularly preferably from 0.
1% to 2% by weight. The reason is that if it is less than 0.01% by weight, the effect of diminishing ultraviolet light is weak, and if it exceeds 4% by weight, the lens becomes brittle, which is not preferable in moldability.

In the present invention, a Turks blue disperse dye is used as the blue dye. The reason is, as is apparent from the examples described later, when the lens is dyed using a disperse dye such as an orange-based or red-based and a Turks blue-based disperse dye, the light in a wavelength range of 450 to 670 nm is used. This is because light can be almost uniformly reduced. Preferred examples of such a Turqus blue disperse dye include Color Index (CI) No. Disperse Blue 7,60,87,18.
1,189,198.

It is not preferable to use a blue disperse dye other than those described above. When the lens is dyed with a blue disperse dye other than the Turqus blue disperse dye and an orange or red disperse dye, the light in the wavelength range of 450 to 620 nm is almost uniformly dimmed. Yes, but wavelength range 620-6
Since the extinction for 70 nm light is insufficient compared to the extinction for light in the preceding wavelength range of 450 to 620 nm, it cannot be uniformly dimmed for light in the wavelength range of 450 to 670 nm, and therefore a tungsten lamp viewed through the lens This is because the color of an object to be illuminated using various light sources such as a fluorescent lamp and a halogen lamp, a transmissive display lamp, a self-luminous indicator lamp, and the like cannot be distinguished to the same color as seen with the naked eye.

In the present invention, the use of two or more disperse dyes selected from orange-based, yellow-based, and red-based disperse dyes means that two or more different disperse dyes are used among the three disperse dyes. means. The reason why two or more disperse dyes are used is that when used together with a Turqus blue disperse dye, a brown or gray color tone is produced on the lens.

The orange, yellow, and red disperse dyes used in the present invention include monoazo, disazo, anthraquinone, nitro, styryl, methine, alylenelenbenzimidacoumarin, quinonaphthalone, and coumarin dyes. Of disperse dyes.

In the present invention, the light in the wavelength range of 450 to 670 nm is almost uniformly reduced, and an illuminated object using various light sources, such as a tungsten lamp, a fluorescent lamp, and a halogen lamp, a transparent display lamp,
The color tone of a lens that can be identified as the same color as that seen by the naked eye by a self-luminous indicator light or the like is limited to a brown or gray color tone. In other color tones, for example, when the color of the lens is yellow or green, it cannot be uniformly reduced with respect to light in a wavelength range of 450 to 670 nm. Therefore, the color of an object to be illuminated using various light sources such as a tungsten lamp, a fluorescent lamp, a halogen lamp, etc., a transmissive display lamp, a self-luminous display lamp, etc., when viewed through the lens is the same as that seen with the naked eye. It is not preferable because it cannot be identified.

To color the lens in brown or gray, put an appropriate amount of orange, yellow, red or turkish blue disperse dye in the same dyeing tank in advance so that the lens becomes brown or gray when colored. There is a method of immersion and a method of immersing each monochromatic dyeing tank in order,
There are no restrictions on the method.

The staining conditions in the present invention are different depending on each elemental technique such as the staining concentration, the staining temperature and the immersion time, but from the dimming ability and the reproducibility of the staining, the staining concentration is from 0.01% by weight to the total amount used.
5% by weight (preferably 0.1% by weight to 1.0% by weight), immersion time is 10 minutes to 6 hours (preferably 20 minutes to 3 hours), and dyeing temperature is 60 ° C to 100 ° C (preferably 80 ° C to 90 ° C) It is preferred that

Further, by forming a surface hardened film and / or another functional film on the obtained spectacle lens, the surface can be modified to impart new properties. For example, multifunctional acrylate or methacrylate UV-curable coating or silicone-based or melamine-based thermosetting coating may be used to impart abrasion resistance, SiO, SiO ₂ , TiO ₂ , CeF
₃ , single layer or multiple layers of CeO ₂ , ZrO ₂ , MgF ₂ , MgO etc. are formed by vapor deposition to form an anti-reflection film, or acrylate or methacrylate-based and styrene-based elastomer or urethane-based elastomer is applied to impact resistance Property, and further, antifogging property, antifouling property, antistatic property and the like can be provided by a known method. It is also possible to combine two or more of these functions.

<Example> Hereinafter, an example of the present invention will be described in detail.

<Example 1> A method for manufacturing a spectacle lens of the present invention will be described in detail.
The manufacturing method described here is merely an example, and spectacle lenses obtained by modification of the manufacturing method obvious to those skilled in the art are also included in the present invention.

99.85% by weight of diethylene glycol bisallyl carbonate as a synthetic resin lens monomer and 2,2'-hydroxy-4-methoxybenzophenone as an ultraviolet absorber
0.15% by weight was sufficiently stirred with a stirrer, and diisopropyl peroxycarbonate (IPP) was added as a polymerization initiator at a ratio of 3 to 100 of the monomer and stirred to obtain a mixed solution. Next, the mixed solution was poured into a lens molding die composed of a glass die and a resin seal, and heated and polymerized in an electric furnace to obtain a synthetic resin lens.

Sumikaron Turquoise Blue G 3g (Sumitomo Chemical Co., Ltd. CI Disperse Blue 60) Resorin Orange 3GL 3g (Bayer Orange Disperse Dye) Dyanic Thread ACE 3g (Mitsubishi Chemical Corp. Red Disperse Dye) ), Water (1) and a surfactant (Hoya Stabilizer, 2 g) were added to prepare three types of dyeing solutions. The synthetic resin lens obtained above was added to Sumicaron Turkey Blue G dye solution. 3 hours at 85 ° C dyeing temperature, then 10 minutes at 85 ° C dyeing temperature with Resorin Orange 3GL dye solution, and 10 minutes at 85 ° C dyeing temperature with Dian Thread ACE dye solution to obtain brown spectacle lens. Obtained.

FIG. 1 shows the spectral transmittance curve of the brown eyeglass lens (measured using a Hitachi 340 recording spectrophotometer).

According to the spectral transmittance curve shown in FIG. 1, the spectacle lens of this embodiment has the following ultraviolet light shielding performance and visible light attenuating performance. That is, the ultraviolet region (I) (about 400 nm)
Below), almost 100% light is shielded.

Next, the visible light region (II) (about 400 to about 780 nm) will be described.

FIG. 2 is a relative luminous efficiency curve showing a change in sensitivity of human eyes to light with wavelength. This relative luminous efficiency curve is obtained by comparing the luminous efficiency of other wavelengths with the wavelength 555 nm as 1, and the wavelength range (III) of about 450 to about 670 nm is a band in which human beings feel the luminance of light most. On the other hand, as shown in FIG. 2, even with visible light, a wavelength band of less than about 450 nm, a wavelength of about 670 nm
It can be understood that the wavelength band exceeding the range is a band in which humans do not feel much light brightness.

FIG. 3 is a diagram in which the relative luminous efficiency curve of FIG. 2 and the transmittance curve of the spectacle lens in the present embodiment of FIG. 1 are combined.
From FIG. 3, the spectacle lens according to the present embodiment has an excellent dimming effect in the band where human beings sense the brightness of light at about 450 to about 670 nm (III), and thus protects eyes from prolonged or strong visible light. It can be seen that the spectacle lens of this embodiment is effective. Further, it can be seen that it has a characteristic of uniformly dimming the light in the wavelength range (450 to 670 nm). Therefore,
Tungsten lamps, fluorescent lamps, halogen lamps, and other illuminated objects, transmission indicator lamps, self-illuminating indicator lamps, and the like that use various light sources when viewed through the spectacle lens according to the present embodiment are those when viewed with the naked eye. Can be identified with the same color.

<Example 2> Sumikaron Turkish Blue G 3g (CI Disperse Blue 60, manufactured by Sumitomo Chemical Co., Ltd.) Dianix Orange BSE 3g (Orange-based disperse dye manufactured by Mitsubishi Kasei Co., Ltd.) Dianic Thread ACE 3g (Mitsubishi Chemical After adding 1 g of water and 2 g of surfactant (Squirt Stabilizer manufactured by Hoya Co., Ltd.) to each of the red disperse dyes manufactured by Co., Ltd., three kinds of dyeing solutions were prepared. Sumicaron Turkey Blue G dye solution at a dyeing temperature of 85 ° C. for 3 hours, then a Dianix orange BSE dye solution at a dyeing temperature of 85 ° C. for 4 minutes, and a dyeing temperature of 8 to the Dianic thread ACE dye solution.
It was immersed at 5 ° C. for 15 minutes to obtain a spectacle lens having a gray color tone.

The spectral transmittance curve is as shown in FIG. 4, and the spectacle lens in this example is excellent in blocking ultraviolet rays,
It can be seen that there is an excellent dimming effect in the wavelength region of nm, which is effective in protecting the eyes from radiation. Also 450-670
Since a flat change in the transmittance curve is shown in the wavelength region of nm, it can be seen that the device has a characteristic of uniformly reducing the light in the wavelength region (450 to 670 nm). Therefore, the colors of the objects to be illuminated using various light sources, such as tungsten lamps, fluorescent lamps, halogen lamps, etc., transmissive indicator lamps, self-luminous indicator lamps, etc., viewed through the spectacle lens according to the present embodiment were viewed with the naked eye. You can identify the same color as when.

<Comparative Example 1> Same as Example 1 except that 99.97% by weight of diethylene glycol bisallyl carbonate as a synthetic resin lens material monomer and 0.03% by weight of 2,2'-dihydroxy-4-n-octoxybenzophenone as an ultraviolet absorber were added. A synthetic resin lens was produced by the polymerization method described in (1). Dianix Blue RE-E 3g (CI Disperse Blue 91 manufactured by Mitsubishi Kasei Co., Ltd.) Resorin Orange 3GL 3g (Orange-based disperse dye manufactured by Bayer) Dyanic Thread ACE 3g (Red dispersion manufactured by Mitsubishi Kasei Corporation) After adding 1 g of water and 2 g of a surfactant (Squirt Stabilizer manufactured by Hoya Co., Ltd.) to prepare three kinds of dyeing solutions, the synthetic resin lens obtained above was treated with a Dianix Blue RN-E dye solution. 3 hours at 85 ° C dyeing temperature, 10 minutes at 85 ° C dyeing temperature with Resorin Orange 3GL dye solution, and 10 minutes at 85 ° C dyeing temperature with Dyanic Thread ACE dye solution to obtain brown dyed lens. Obtained.

The spectral transmittance curve has a wavelength range of about 620 as shown in FIG.
The degree of dimming for light of 670670 nm is inferior to the degree of dimming for light of a wavelength range of 450 to 620 nm. Therefore, the colors of the objects to be illuminated using various light sources, such as tungsten lamps, fluorescent lamps, halogen lamps, etc., transmissive indicator lamps, self-luminous indicator lamps, etc., viewed through the spectacle lens in this comparative example were viewed with the naked eye. It is distinguished by a different color from time. In addition, the eyeglass lens in this comparative example was a color display, and a color erroneous recognition of a warning color for protecting eyes from radiation occurred.

Comparative Example 2 A synthetic resin lens was manufactured using the same monomer composition and polymerization method as in Example 1. Furthermore, DIANICS BLUE ACE 3g (Mitsubishi Kasei Corp. CI Disperse Blue 56) DIANICS Orange BSE 3g (Mitsubishi Kasei Corp. orange disperse dye) DIANIC Thread ACE 3g (Mitsubishi Kasei Corp. red dispersion After adding 1 g of water and 2 g of a surfactant (Hoya Stabilizer manufactured by Hoya Co., Ltd.) to each of the dyes to prepare three types of dyeing solutions, the synthetic resin lens obtained above was converted to a Dynamix Blue ACE dye solution. 30 minutes at a dyeing temperature of 85 ° C, then 5 minutes at a dyeing temperature of 85 ° C for a Dianix orange BSE dye solution, and 1 minute at a dyeing temperature of 85 ° C for a Dianic thread ACE dye solution
It was immersed for 5 minutes to obtain a gray stained lens.

The spectral transmittance curve has a wavelength range of about 620 as shown in FIG.
The degree of dimming for light of 670670 nm is inferior to the degree of dimming for light of a wavelength range of 450 to 620 nm. Therefore, the color of an object to be illuminated using various light sources such as a tungsten lamp, a fluorescent lamp, a halogen lamp, and the like, a transmissive display lamp, a self-luminous indicator lamp, and the like when viewed through the spectacle lens in this comparative example is the same as when viewed with the naked eye. Different colors are identified. In the eyeglass lens of this comparative example, a color display and a warning color were erroneously recognized.

<Effect of the Invention> A synthetic resin lens containing an ultraviolet absorber is added.
Using (a) a Turqus blue disperse dye and (b) two or more disperse dyes selected from among orange, yellow and red disperse dyes, dyed into a brown or gray color tone. By blocking ultraviolet rays,
A spectacle lens that excels in dimming visible light and is effective in protecting eyes from radiation was obtained. The spectacle lens of the present invention is 450
Since it has a characteristic of almost uniformly dimming in a wavelength range of up to 670 nm, an illuminated object using various light sources such as a tungsten lamp, a fluorescent lamp, a halogen lamp, etc., which is viewed through the spectacle lens, a transmissive display lamp In addition, there is an advantage that the color of the self-luminous type indicator light or the like can be distinguished to the same color as seen with the naked eye.

[Brief description of the drawings]

FIG. 1 is a transmittance curve diagram of the spectacle lens of Example 1 in an ultraviolet region and a visible region, FIG. 2 is a relative luminous efficiency curve diagram of a human eye, and FIG. 3 is a diagram of FIGS. FIG. 4 is a transmittance curve diagram of the spectacle lens of Example 2 in an ultraviolet region and a visible region, and FIG. 5 is a transmittance curve diagram of the spectacle lens of Comparative Example 1 in an ultraviolet region and a visible region. FIG. 6 shows Comparative Example 2
FIG. 4 is a transmittance curve diagram of the spectacle lens of FIG.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02C 7/00-7/16

Claims (2)

(57) [Claims] 1. A synthetic resin lens containing an ultraviolet absorbent, comprising: (a) a Turqus blue-based disperse dye; and (b) an orange-based, yellow-based, and red-based disperse dye. A spectacle lens characterized by being dyed into a brown or gray color tone using a disperse dye. 2. The spectacle lens according to claim 1, wherein a surface hardened film and / or another functional film is formed.