JP2012185347A - Color lens and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color lens that can be colored simply and can suppress its decoloration, and a manufacturing method therefor.SOLUTION: A color lens 1 includes a lens base material 11, in which hole portions 20 are provided on a surface 111 of the lens base material 11 and respective coloration portions 30 are provided inside the hole portions 20. Also, provided is a manufacturing method of the color lens 1 including the lens base material 11, which comprises a hole portion forming step of forming the hole portions 20 on the surface 111 of the lens base material 11 and a coloration step of forming the respective coloration portions 30 inside the hole portions 20.

Description

  The present invention relates to a color lens and a method for manufacturing the color lens.

Glasses having color lenses such as sunglasses are preferably used in terms of fashionability, light shielding properties, and the like. The color lens can be colored by a method of immersing a lens base material in a coloring liquid or an ink jet type method of providing a colored layer on a lens base material or a hard coat layer (Patent Documents 1 and 2).
Patent Document 1 describes a color lens in which a colored layer is formed on the surface of a lens substrate.
Patent Document 2 describes a color lens in which a colored layer is formed on a non-water-repellent layer such as a hard coat layer.

JP-A-8-20080 JP 2006-264109 A

However, the conventional examples shown in Patent Documents 1 and 2 have a problem that color fading easily occurs because the adhesion between the colored layer and the lens substrate or non-water-repellent layer adjacent thereto is not sufficient.
Further, in the case where the lens substrate is colored by immersing it in a coloring liquid, there is a problem that it takes time to color and the coloring speed is slow.
Furthermore, when the water repellent layer is formed on the surface of the lens substrate, it is difficult to color the water repellent layer because it repels the colorant. Therefore, the lens base material and the non-water repellent layer are colored before forming the water repellent layer.
However, it is difficult in a retail store to color before forming the water repellent layer and form the water repellent layer after that. Therefore, there is a problem that the lens factory has to perform coloring work in advance and cannot be colored at the retail store according to the customer's request.

  Therefore, an object of the present invention is to provide a color lens that can suppress color fading and can be easily colored, and a method for manufacturing the color lens.

The color lens of the present invention is a color lens provided with a lens substrate, wherein a hole is provided on the surface of the lens substrate, and a colored portion is provided inside each of the holes. .
In the invention of this configuration, the colored portion is difficult to be removed from the inside of the hole due to the anchor effect, so that even if the surface is worn, discoloration can be suppressed. In addition, the number of coloring parts may be one or plural, and in the case of plural, the same color may be used or different colors may be used.

The color lens of the present invention is a color lens comprising a lens substrate and a non-water-repellent layer provided on the lens substrate and composed of at least one layer, and the non-water-repellent layer is formed on the surface thereof. A hole is provided, and a colored portion is provided in each of the holes.
In the invention of this configuration, since the non-water-repellent layer has a hole portion and the colored portion is formed inside the hole portion, even if the surface of the non-water-repellent layer is worn, color fading can be suppressed. .

Here, in the present invention, it is preferable that the outermost surface layer of the non-water-repellent layer that is farthest from the lens substrate is a hard coat layer.
In the invention of this configuration, even if the surface of the hard coat layer is worn, discoloration can be suppressed.

In the present invention, it is preferable that the outermost surface layer of the non-water-repellent layer that is farthest from the lens substrate is an antireflection layer.
In the invention of this configuration, even if the surface of the antireflection layer is worn, discoloration can be suppressed.

The color lens of the present invention includes a lens base material, a water repellent layer provided on the lens base material, and a non-repellent material which is provided between the water repellent layer and the lens base material and includes at least one layer. A color lens comprising a water layer, wherein the water repellent layer is provided with a hole on a surface thereof, a colored portion is provided inside the hole, and a bottom of the hole on the lens base material side. Is located in the lens substrate or the non-water-repellent layer.
In the invention of this configuration, since the bottom of the hole is located on the lens substrate or the non-water-repellent layer, a colored portion can be formed inside the hole even when the water-repellent layer is provided. Moreover, since the colored part is formed inside the hole part, even if the surface of the water repellent layer is worn, color fading can be suppressed.

  Here, in the present invention, the color lens is calculated using R and P from the following equation (1), where R is the radius of the hole and P is the distance between the adjacent holes. When the density of the holes is DS, the DS preferably satisfies the following relational expression (2).

DS = (100 × π × R ² ) / P ² (1)
DS> 20 (%) (2)

  In the invention of this configuration, since the density DS of the hole is larger than 20%, the color of the lens can be visually recognized more satisfactorily.

The method for producing a color lens of the present invention is a method for producing a color lens including a lens base material, wherein a hole part forming step for forming a hole part on the surface of the lens base material is provided inside the hole part. And a coloring step for forming a colored portion.
In the invention of this configuration, since the colored portion is formed inside the hole portion, the coloring can be performed more quickly than in the case where the colored portion is immersed from the surface of the lens substrate.
Further, as described above, even if the surface is worn due to the anchor effect, a color lens that can suppress color fading can be obtained.

The method for producing a color lens of the present invention includes a laminating step of laminating a water repellent layer composed of at least one layer on the surface of a lens substrate, and a hole forming step of forming a hole in the surface of the non-water repellent layer. And a coloring step of forming a colored portion inside each of the holes.
In the invention of this configuration, the non-water-repellent layer can be easily colored as compared with the case where the water-repellent layer is colored by immersion. In addition, a color lens capable of suppressing color fading can be obtained.

The method for producing a color lens of the present invention includes a laminating step of sequentially laminating a non-water-repellent layer and a water-repellent layer composed of at least one layer on the surface of a lens substrate, and a hole in the surface of the water-repellent layer. A hole forming step to be formed, and a coloring step for forming a colored portion inside each of the holes, wherein the hole forming step includes a bottom of the hole on the lens base material side as the lens base. It is located in a material or the said non-water-repellent layer, It is characterized by the above-mentioned.
In the invention of this configuration, as described above, it is possible to obtain a color lens that can be easily colored and can suppress discoloration. Even if a water-repellent layer is formed on the lens substrate before coloring, a hole is formed in the water-repellent layer, and a colored portion is formed inside the hole so that it can be easily colored at retail stores. it can. Therefore, it can be easily colored at the retail store according to customer requirements.

Here, in the present invention, it is preferable that the hole forming step forms the hole by irradiating an ultraviolet pulse laser.
In the invention of this configuration, since the hole is formed by the ultraviolet pulse laser having a relatively low intensity, it can be suppressed that the hole is unnecessarily widened and the optical characteristics of the lens are deteriorated.

Moreover, in this invention, it is preferable that the said coloring process forms a colored part inside the said hole part by an inkjet system.
In the invention of this configuration, the coloring liquid can be discharged at a density substantially the same as the density of the hole by the ink jet method. As a result, the colored portion can be formed by easily filling the inside of the hole with the coloring liquid.

It is sectional drawing which shows the color lens of 1st Embodiment which concerns on this invention. It is a top view which shows the said color lens. It is a figure which shows the relationship between the density of the hole part in the said color lens, and the pitch space | interval of a hole part. It is a figure which shows the relationship between the density of the hole in the said color lens, and the diameter of a hole. (A) It is sectional drawing which shows the lens base material before the hole part formation process in the manufacturing method of the said color lens. (B) The figure which shows the lens base material in the hole part formation process in the manufacturing method of the said color lens, and a coloring process. It is sectional drawing which shows the color lens of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows the color lens of 3rd Embodiment concerning this invention. It is sectional drawing which shows the color lens of 3rd Embodiment concerning this invention.

<First Embodiment>
The color lens according to the first embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view showing a color lens according to a first embodiment of the present invention. FIG. 2 is a plan view showing the color lens.
The color lens of the first embodiment is preferably used as a spectacle lens, but can also be used as a camera lens and a projection lens.

<Configuration of color lens>
As shown in FIGS. 1 and 2, the color lens 1 of the present embodiment is provided in a lens base 11, a plurality of holes 20 provided in the surface 111 of the lens base 11, and inside the holes 20. The colored portion 30 is provided.
The lens substrate 11 has a thickness of about 1 mm to 2 mm. This lens substrate 11 is made of a transparent plastic having a refractive index of 1.6 or more. Examples of the material of the lens substrate 11 include acrylic resin, thiourethane resin, methacrylic resin, allyl resin, episulfide resin, and polycarbonate resin. The lens substrate 11 may be made of inorganic glass.

A plurality of hole portions 20 are formed in a dot shape on the surface 111 of the lens substrate 11 and are separated from each other. The hole 20 is circular in plan view, but may be semicircular or polygonal.
A plurality of hole portions 20 are formed from the surface 111 of the lens base material 11 to a part of the lens base material 11 in the thickness direction. That is, the bottom portion 21 of the hole 20 is located inside the lens base material 11, and the hole 20 does not penetrate the lens base material 11.
The depth D of the hole 20 is preferably 4 μm or more and 8 μm or less.
The diameter L of the hole 20 is preferably 20 μm or more and 30 μm or less.
The distance (pitch interval) P between the centers of the adjacent hole portions 20 and the center of the hole portions 20 is preferably 35 μm or more and 60 μm or less.
By setting such depth D, diameter L, and pitch interval P, it is easy to color the lens substrate 11, and color fading can be prevented. In addition, the color of the color lens can be easily seen.

The coloring part 30 is provided in the entire inside of the hole part 20. The colored portion 30 is formed by filling the hole 20 with a colored liquid. The colored liquids may be the same color or different colors.
The coloring liquid contains a pigment or a dye. Examples of dyes include nitroso dyes, nitro dyes, azo dyes, stilbene azo dyes, ketoimine dyes, triphenylmethane dyes, xanthene dyes, acridine dyes, quinoline dyes, methine dyes, polymethine dyes, thiazole dyes, indamine dyes, indophenols. Examples include dyes, azine dyes, oxazine dyes, thiazine dyes, sulfur dyes, aminoketone dyes, oxyketone dyes, anthraquinone dyes, indigoid dyes, and phthalocyanine dyes.
Examples of the pigment include insoluble azo pigments, condensed azo pigments, azo pigments such as azo lakes and chelate azo pigments, phthalocyanine pigments, perylene and perinone pigments, anthraquinone pigments, quinacridone pigments, dioxane pigments, thioindigo pigments, isoindolinone pigments, and quinophthalone pigments. Examples include polycyclic pigments, nitro pigments, nitroso pigments, aniline black, and daylight fluorescent pigments.
The coloring liquid may contain an additive. Examples of the additive include carbon blacks (CI pigment black 7) such as furnace black, lamp black, acetylene black and channel black, iron oxide, titanium oxide and the like. These dyes, pigments and additives may be used alone or in combination.
The coloring liquid can be obtained by dispersing these dyes or the like in an appropriate solvent (water or the like).
In addition, when the lens base material 11 is glass, it is preferable that a coloring liquid contains a glass component. This is because the adhesion to the lens substrate 11 is improved by including the glass component.

Here, the color visibility of the color lens 1 will be described with reference to FIGS.
FIG. 3 is a diagram showing the relationship between the hole density and the pitch interval of the hole in the color lens. FIG. 4 is a diagram showing the relationship between the hole density and the hole diameter in the color lens.
The visibility of the color of the color lens 1 is good when the density DS of the hole 20 calculated from the radius R of the hole 20 and the pitch interval P shown in the following formula (1) satisfies the following formula (2). . That is, when the DS is larger than 20%, the color of the color lens 1 can be favorably visually recognized.

DS = (100 × π × R ² ) / P ² (1)
DS> 20 (%) (2)

As shown in FIG. 3, for example, when the diameter L of the hole 20 is 20 μm (radius R: 10 μm), the density DS of the hole 20 is less than 20% by setting the pitch interval P to about 40 μm or less. growing.
Further, when the diameter L of the hole 20 is 100 μm (radius R: 50 μm), the DS of the hole 20 becomes larger than 20% if the pitch interval P is about 200 μm or less.
In addition, when the diameter L of the hole 20 is 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, and 90 μm, the density DS of the hole 20 is similarly reduced by setting the pitch interval P to a predetermined value or less. Is greater than 20%.
From this, it can be seen that the larger the diameter L of the hole portion 20, the better the color of the color lens 1 can be visually recognized even when the pitch interval P is increased.
On the other hand, as shown in FIG. 4, when the pitch interval P is 250 μm, by setting the diameter L of the holes 20 to about 125 μm (radius R: 62.5 μm) or more, the density DS of the holes 20 is 20%. It can be seen that the color of the color lens 1 can be seen well.

(Color lens manufacturing method)
The manufacturing method of the color lens of 1st Embodiment is demonstrated using FIG. 5 (A), (B).
FIG. 5A is a cross-sectional view showing the lens base material before the hole forming step in the color lens manufacturing method, and FIG. 5B is a hole forming step and a coloring step in the color lens manufacturing method. It is sectional drawing which shows a lens base material.
The manufacturing method of the color lens of 1st Embodiment is provided with a hole part formation process and a coloring process.

First, as shown in FIG. 5A, a lens substrate 11 in which no hole is formed is prepared.
Next, as shown in FIG. 5B, in the hole forming step, the surface 111 of the lens substrate 11 is irradiated with an ultraviolet pulse laser to form a plurality of holes 20. Specifically, the hole 20 is formed over a part of the lens substrate 11 in the thickness direction of the lens substrate 11. As a result, the bottom 21 is positioned inside the lens substrate 11.
And a hole part formation process forms the hole part 20 in the dot form in the whole surface 111 of the lens base material 11 (refer FIG. 2).
The depth D and the diameter L of the hole 20 can be changed by adjusting the laser light intensity, the spot size, the pulse frequency, and the like (see FIGS. 1 and 2). Here, by appropriately setting the radius R of the hole 20 and the pitch interval P, the density DS of the hole 20 is set to exceed 20% as shown in the above formulas (1) and (2). it can.

In the coloring step, as shown by a chain line in FIG. 5B, the colored portions 30 are formed inside the plurality of holes 20 by an inkjet method.
That is, in the coloring step, the coloring liquid 30 </ b> A is discharged from the nozzle 40 toward the hole 20. Thereby, the colored liquid 30 </ b> A is filled into the hole 20. Thereafter, the colored portion 30 is formed by drying and solidifying the colored liquid 30A. In this way, a color lens 1 as shown in FIG. 1 is obtained. The colored portion 30 may be formed by a dipping method (dipping method), a spin coating method, or the like.

According to the first embodiment, the following effects can be achieved.
(1) Since it is the structure which forms the coloring part 30 inside the hole part 20, it can color easily. Moreover, since the colored part 30 is difficult to remove from the inside of the hole part 20 due to the anchor effect, color fading can be suppressed.
(2) By making the density DS of the hole 20 larger than that of the hole 20, the color of the color lens 1 can be visually recognized more favorably.
(3) Since the hole 20 is formed by an ultraviolet pulse laser having a relatively low intensity, it is possible to prevent the hole 20 from being unnecessarily widened and the optical characteristics of the color lens 1 from being deteriorated.
(4) The colored liquid 30 </ b> A can be applied at substantially the same density as the density DS of the hole 20 by an inkjet method. Thereby, the colored portion 30 can be easily formed by filling the hole 20 with the colored liquid 30A.

Second Embodiment
Next, although the color lens of 2nd Embodiment is demonstrated using FIG. 6, description is abbreviate | omitted or simplified about the structure similar to 1st Embodiment.
FIG. 6 is a cross-sectional view showing the color lens of the second embodiment.
The second color lens 1 </ b> A of the second embodiment is different from the first embodiment in the configuration in which the non-water-repellent layer 12 is newly provided on the surface 111 of the lens substrate 11. The non-water-repellent layer 12 is constituted by a hard coat layer 121.
The hard coat layer 121 is for imparting scratch resistance to the lens substrate 11. The thickness of the hard coat layer 121 is about 2 μm to 3 μm. As a material for forming the hard coat layer 121, for example, a photocurable silicone composition mainly composed of an organopolysiloxane, an acrylic ultraviolet curable monomer composition, an inorganic material having inorganic fine particles such as SiO ₂ and TiO _2. There are fine particle-containing thermosetting compositions.

The second hole portion 20 </ b> A of the second embodiment is formed on the surface 121 </ b> A of the hard coat layer 121. The second bottom portion 21 </ b> A of the second hole portion 20 </ b> A may be located inside the hard coat layer 121 or may be located inside the lens base material 11.
Such a 2nd color lens 1A can be manufactured by the method similar to the manufacturing method of the color lens 1 of 1st Embodiment. Further, the color lens 1 of the second embodiment can achieve the same effects as those of the first embodiment.
In addition, you may provide the primer layer for improving the adhesiveness of the lens base material 11 and the hard-coat layer 121 between the lens base material 11 and the hard-coat layer 121 as needed. Examples of the material for the primer layer include a composition containing an organic resin polymer having polarity and metal oxide fine particles containing titanium oxide. As the organic resin polymer, a polyester resin, a polyurethane resin, an epoxy resin, or the like can be used.

<Third Embodiment>
Next, the color lens of the third embodiment will be described with reference to FIG. 7, but the description of the same configuration as that of the second embodiment will be omitted or simplified.
FIG. 7 is a cross-sectional view showing the color lens of the third embodiment.
The third color lens 1B of the third embodiment is different from the second embodiment in that the surface 111 of the lens substrate 11 has a two-layer non-water-repellent layer 12.
That is, the third color lens 1 </ b> B of the third embodiment has a configuration in which the hard coat layer 121 and the antireflection layer 122 are sequentially laminated on the surface 111 of the lens substrate 11. The non-water repellent layer 12 is composed of a hard coat layer 121 and an antireflection layer 122.
The antireflection layer 122 is preferably an inorganic layer composed of multiple layers, and has a thickness of, for example, 432 nm. As an inorganic layer composed of such multilayers, for example, a five-layer structure of SiO ₂ layer / ZrO ₂ layer / SiO ₂ layer / ZrO ₂ layer / SiO ₂ layer in order from the hard coat layer 121 side, or SiO ₂ layer / TiO ₂ There is a 5-layer structure of ₂ layers / SiO ₂ layers / TiO ₂ layers / SiO ₂ layers. However, the antireflection layer 122 may be composed of an organic layer.

The third hole 20 </ b> B of the third embodiment is formed on the surface 122 </ b> A of the antireflection layer 122. The third bottom portion 21 </ b> B of the third hole portion 20 </ b> B may be located inside any one of the antireflection layer 122, the hard coat layer 121, and the lens base material 11.
Such a third color lens 1B can be manufactured by a method similar to the method of manufacturing the color lens 1 of the first embodiment. Further, the third color lens 1B can achieve the same effects as those of the first embodiment.

<Fourth embodiment>
Next, the color lens of the fourth embodiment will be described with reference to FIG. 8, but the description of the same configuration as that of the third embodiment will be omitted or simplified.
FIG. 8 is a cross-sectional view showing the color lens of the fourth embodiment.
The fourth color lens 1C of the fourth embodiment is different from the third embodiment in that the water repellent layer 13 is provided on the surface 122A of the antireflection layer 122.
That is, the fourth color lens 1 </ b> C of the fourth embodiment has a configuration in which the hard coat layer 121, the antireflection layer 122, and the water repellent layer 13 are sequentially laminated on the surface 111 of the lens substrate 11.
The water repellent layer 13 has water repellency and oil repellency and functions as an antifouling layer. The thickness of the water repellent layer 13 is 1 nm, for example. Examples of the material for forming the water repellent layer 13 include two or more silane compounds, and at least one of them is a fluorine-containing silane compound.

The fourth hole portion 20 </ b> C of the fourth embodiment is formed in the surface 131 of the water repellent layer 13. The fourth bottom portion 21 </ b> C of the fourth hole portion 20 </ b> C needs to be located in any one of the lens base material 11, the hard coat layer 121, and the antireflection layer 122. This is because when the fourth bottom 21C is located in the water repellent layer 13, that is, when the hole 20 is formed only in the water repellent layer 13, the water repellent layer 13 repels the colored liquid, This is because the colored portion 30 cannot be formed.
Such 4th color lens 1C can be manufactured by the method similar to the manufacturing method of the color lens 1 of 1st Embodiment. Further, the fourth color lens 1C of the fourth embodiment can achieve the same effects as those of the first embodiment.

(Modification)
It should be noted that the present invention is not limited to the present embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, it has been described that the hole portion has a dot shape in plan view, but a groove shape having a predetermined length may be used. Moreover, although the said embodiment demonstrated that the colored part was formed in the whole inside of a hole part, you may form a colored part partially in the inside of a hole part. Further, in the third embodiment, an antifogging layer may be formed on the surface of the antireflection layer.

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
[Example 1, Reference Example 1-1, 1-2]
Example 1 and Reference Examples 1-1 and 1-2 were carried out as examples corresponding to the color lens of the first embodiment.
Example 1
As a lens, an episulfide plastic with a refractive index of 1.74 (Seiko Epson Co., Ltd., SEIKO Prestige), which is composed only of a lens base material, is used as shown below. And provided.
Specifically, this lens was irradiated with a pulse laser having a wavelength of 266 nm (pulse frequency 10 kHz, light intensity 10 mW, spot size 15 μm).
When the space of the irradiated part was measured with a phase contrast microscope ZYGO New View 6300 (manufactured by Canon Inc.), a hole having a diameter L of 20 μm, a pitch interval P of 35 μm, a depth of D 4 μm, and a density of DS 25.6% was formed. .

Next, diethylene glycol, glycerin, commercially available pigment ink ICC38A (Cyan) (manufactured by Seiko Epson), water-based polyester resin (manufactured by Ito Optical Co., Ltd.), and Surfinol, a surfactant for controlling surface tension. 61 (manufactured by Air Products Inc.), Fz-2105 (manufactured by Nihon Unicar), and pure water were blended in the following proportions to prepare a coloring liquid. And this was filtered and deaerated.
Using an ink jet printer (MMP183T, manufactured by Mastermind), this colored liquid is discharged and applied to the hole of the lens substrate described above, and dried and cured at 50 ° C. for 30 minutes to fix the colored liquid and color. Part was formed. Thereby, the lens of Example 1 was obtained.
(Mixing ratio of coloring liquid)
(1) Diethylene glycol: 10% by mass
(2) Glycerin: 5% by mass
(3) ICC38A (Cyan) (manufactured by Seiko Epson): 10% by mass
(4) Water-based polyester resin (manufactured by Ito Optical Co., Ltd.): 4% by mass (value as solid content)
(5) Surfynol 61 (Air Products Inc.): 5000 PPm
(6) Fz-2105 (Nihon Unicar): 5000PPm
(7) Pure water: remaining amount

(Reference Examples 1-1 and 1-2)
The same operation as in Example 1 was performed except that the pitch interval P was changed as shown in Table 1.

(Evaluation)
The lenses of Example 1 and Reference Examples 1-1 and 1-2 were evaluated according to the following evaluation criteria.
(Evaluation criteria)
○: The color can be visually recognized well.
Δ: The color can be visually recognized, but the color is difficult to visually recognize.

(result)
In Example 1 and Reference Examples 1-1 and 1-2, it was found that any color lens can visually recognize the color. Moreover, in Example 1, since the density of the hole part was 20% or more, it turned out that the color of a color lens can be visually recognized favorably compared with the reference examples 1-1 and 1-2.

[Example 2, Reference Examples 2-1 and 2-2]
Example 2 and Reference Examples 2-1 and 2-2 were performed as examples corresponding to the color lens of the second embodiment.
(Example 2)
As the lens, an episulfide plastic having a refractive index of 1.74 (SEIKO Prestige, manufactured by Seiko Epson Corporation) having a lens substrate and a hard coat layer was used. Except this, it implemented similarly to Example 1 and evaluated.

(Reference Examples 2-1 and 2-2)
It implemented similarly to Example 2 and evaluated except having changed the pitch space | interval P as shown in Table 2.

(result)
In Example 2 and Reference Examples 2-1 and 2-2, it was found that any color lens can visually recognize the color. Moreover, in Example 2, since the density of the hole part was 20% or more, it turned out that the color of a color lens can be visually recognized favorably compared with the reference examples 2-1 and 2-2.

[Example 3, Reference Examples 3-1, 3-2]
As examples corresponding to the color lens of the third embodiment, Example 3 and Reference Examples 3-1, 3-2 were performed.
(Example 3)
As the lens, an episulfide plastic having a refractive index of 1.74 (SEIKO Prestige, manufactured by Seiko Epson Corporation) having a lens substrate, a hard coat layer, and an antireflection layer was used. Except this, it implemented similarly to Example 1 and evaluated.

(Reference Example 3-1.3-2)
It implemented similarly to Example 3 and evaluated except having changed the pitch space | interval P as shown in Table 3.

(result)
In Example 3 and Reference Examples 3-1 and 3-2, it was found that any color lens can visually recognize the color. Moreover, in Example 3, since the density DS of the hole was 20% or more, it was found that the color of the color lens can be visually recognized better than those of Reference Examples 3-1 and 3-2.

[Examples 4, 5-1, 5-2, 6, Reference Examples 4-1, 4-2, 5, 6]
As examples corresponding to the color lens of the fourth embodiment, Examples 4, 5-1, 5-2, 6 and Reference Examples 4-1, 4-2, 5, 6 were performed.
(Example 4)
As a lens, an episulfide plastic having a refractive index of 1.74 (SEIKO Prestige, manufactured by Seiko Epson Corporation) was used. Except this, it implemented similarly to Example 1 and evaluated. This lens includes a lens substrate, a hard coat layer, an antireflection layer, and a water repellent layer. Here, the thickness of the antireflection layer is 432 m, and the thickness of the water repellent layer is 1 nm.
(Reference Examples 4-1 and 4-2)
It implemented similarly to Example 4 and evaluated except having changed the pitch space | interval P as shown in Table 4.
(Example 5-1)
It implemented similarly to Example 4 and evaluated except having changed the spot size and changing the diameter L and the depth D of the hole as shown in Table 4.
(Example 5-2, Reference Example 5)
It implemented similarly to Example 5 and evaluated except having changed the pitch space | interval P as shown in Table 4.
(Example 6)
The same as in Example 4 except that the spot size was changed, the hole diameter L and depth D were changed as shown in Table 4, and the pitch interval P was changed as shown in Table 4. And evaluated.
(Reference Example 6)
It implemented similarly to Example 6 and evaluated except having changed the pitch space | interval P as shown in Table 4.

(result)
In Examples 4, 5-1, 5-2, and 6 and Reference Examples 4-1, 4-2, 5, and 6, it was found that any color lens can visually recognize the color as compared with the comparative example. In Examples 4, 5-1, 5-2, and 6, the density of the holes is 20% or more, so that the color of the color lens is larger than that of Reference Examples 4-1, 4-2, 5, and 6. It was found that can be seen well.

  The present invention can be used as a color lens such as an eyeglass lens or a camera lens, or a method for manufacturing a color lens.

  DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C ... Color lens, 11 ... Lens base material, 12 ... Non-water-repellent layer, 13 ... Water-repellent layer, 20 ... Hole part, 20A ... Second hole part, 20B ... Third hole part, 20C ... 4th hole, 21 ... bottom, 21A ... 2nd bottom, 21B ... 3rd bottom, 21C ... 4th bottom, 30 ... colored part, 111, 121A, 122A ... surface, 121 ... hard coat layer, 122 ... reflection Prevention layer

Claims (11)

A color lens comprising a lens substrate,
A hole is provided on the surface of the lens substrate,
A color lens, wherein a colored portion is provided in each of the hole portions. A color lens comprising a lens substrate and a non-water-repellent layer provided on the lens substrate and composed of at least one layer,
The non-water-repellent layer is provided with a hole on the surface,
A color lens, wherein a colored portion is provided in each of the hole portions. The color lens according to claim 2,
The color lens, wherein the outermost surface layer of the non-water-repellent layer that is farthest from the lens substrate is a hard coat layer. The color lens according to claim 2,
The color lens, wherein the outermost surface layer of the non-water repellent layer that is farthest from the lens substrate is an antireflection layer. A color lens comprising a lens substrate, a water-repellent layer provided on the lens substrate, and a non-water-repellent layer provided between the water-repellent layer and the lens substrate and composed of at least one layer Because
The water repellent layer has a hole on its surface,
A colored portion is provided inside each of the holes,
The color lens, wherein a bottom portion of the hole portion on the lens substrate side is located on the lens substrate or the non-water-repellent layer. In the color lens according to any one of claims 1 to 5,
The radius of the hole is R,
Let P be the distance between adjacent holes,
When the density of the hole calculated from the following formula (1) using R and P is DS,
The DS satisfies the following relational expression (2).
DS = (100 × π × R ² ) / P ² (1)
DS> 20 (%) (2) A method for producing a color lens comprising a lens substrate,
A hole forming step of forming a hole in the surface of the lens substrate;
A color lens manufacturing method comprising: forming a colored portion inside each of the hole portions. A laminating step of laminating a water repellent layer composed of at least one layer on the surface of the lens substrate;
A hole forming step of forming a hole in the surface of the non-water-repellent layer;
A color lens manufacturing method comprising: forming a colored portion inside each of the hole portions. A laminating step of sequentially laminating a non-water-repellent layer and a water-repellent layer composed of at least one layer on the surface of the lens substrate;
A hole forming step of forming a hole in the surface of the water repellent layer;
A coloring step for forming a colored portion inside each of the holes, and
In the hole forming step, the bottom of the hole on the lens base material side is positioned on the lens base or the non-water-repellent layer. In the manufacturing method of the color lens in any one of Claim 7- Claim 9,
In the hole forming step, the hole is formed by irradiating with an ultraviolet pulse laser. In the manufacturing method of the color lens in any one of Claim 7- Claim 10,
In the coloring step, a colored portion is formed inside the hole portion by an ink jet method.

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