JP2018159860A - Optical product - Google Patents

Abstract

An optical product exhibiting antibacterial properties while having an optical function such as antireflection is provided. A dielectric multilayer film according to design example 1 having the illustrated reflectance distribution is formed on a base material, and the dielectric multilayer film includes four low refractive index dielectric layers (SiO 2 layers, And a metal ion-supporting zeolite-containing layer) and three high refractive index dielectric layers (TiO2 layer). As the outermost layer (seventh layer) which is the farthest layer from the base material in the dielectric multilayer film, a dielectric layer containing metal ion-carrying zeolite (antibacterial material) is disposed. [Selection] Figure 1

Description

  The present invention relates to an optical product having antibacterial properties.

As an optical component having antibacterial properties, those described in Japanese Patent Application Laid-Open No. 2010-139964 (Patent Document 1) are known.
An antireflection film is provided on the surface of the optical component, and a predetermined organic antibacterial agent is provided on the antireflection film. The predetermined organic antibacterial agent is N- (trimethoxylpropyl) isothiouronium chlorite, N-trimethoxysilylpropyl-N-alkyl-N-methylammonium chloride, or N-trimethoxysilylpropyl-N- Alkyl-N, N-dimethylammonium chloride.

JP 2010-139964 A

In the above optical component, when a film of a predetermined organic antibacterial agent is formed on the surface, the film of the organic antibacterial agent is relatively weak against heat, is relatively large in change over time, and is inferior in durability. .
Therefore, a main object of the present invention is to provide an optical product exhibiting antibacterial properties while having an optical function such as antireflection.

In order to achieve the above object, the invention described in claim 1 includes a base material, one or more low refractive index dielectric layers and one or more high refractive index dielectric layers formed on the surface of the base material. A dielectric multilayer film including a metal ion-carrying zeolite as an outermost layer that is the farthest layer from the substrate in the dielectric multilayer film. Is.
The invention according to claim 2 is characterized in that, in the above invention, the metal ion-supported zeolite is at least one of silver ion-supported zeolite, copper ion-supported zeolite, and copper zinc ion-supported zeolite. It is.
The invention according to claim 3 is the above invention, wherein the dielectric layer of the outermost layer contains SiO ₂ .
The invention according to claim 4 is the above invention, further comprising a water repellent layer exhibiting water repellency, wherein the water repellent layer is disposed on the outermost layer in the dielectric multilayer film. It is characterized by.
According to a fifth aspect of the present invention, in the above invention, the water repellent layer is a fluorine-containing organosilicon compound.

  The main effect of the present invention is to provide an optical product exhibiting antibacterial properties while having an optical function such as antireflection.

It is a graph which shows the transmittance | permeability distribution in the wavelength range of the visible region which concerns on the design example 1, or its adjacent region. 3 is a graph similar to FIG. 1 according to design example 2.

  Hereinafter, an example of an embodiment according to the present invention will be described based on the drawings as appropriate.

In the optical product according to the present invention, a dielectric multilayer film is formed on the substrate.
The substrate has translucency. The substrate may have any shape such as a plate shape, a block shape, or a lens shape. As the base material, a thermosetting resin is preferably used. For example, polyurethane resin, thiourethane resin, urethane-urea resin, episulfide resin, polycarbonate resin, polyester resin, acrylic resin, polyethersulfone resin, poly-4- Methylpentene-1 resin, diethylene glycol bisallyl carbonate resin, or a combination thereof is used.
There are no particular restrictions on the type or application of the base material, and it is preferable to impart optical functions and antibacterial properties. For example, cameras (including digital cameras, cameras with built-in communication devices, security cameras) and glasses Lenses, housings for home appliances, various films, and windows.

The dielectric multilayer film is provided on at least one surface of the substrate. When the substrate is plate-shaped (lens-shaped), the dielectric multilayer film may be provided only on one side, or may be provided on both sides. When provided on both sides, the dielectric multilayer films are mutually connected. The same structure may be used.
The dielectric multilayer film includes one or more low refractive index dielectric layers and one or more high refractive index dielectric layers.
Preferably, a plurality of low refractive index dielectric layers and high refractive index dielectric layers are both arranged alternately.
The low refractive index dielectric layer is preferably formed by vapor deposition of a low refractive index material. Examples of the low refractive index material include at least one of silicon oxide (particularly SiO ₂ ) and magnesium fluoride (particularly MgF ₂ ).
The high refractive index dielectric layer is preferably formed by vapor deposition of a high refractive index material. Examples of the high refractive index material include at least one of zirconium oxide (particularly ZrO ₂ ), titanium oxide (particularly TiO ₂ ), tantalum oxide (particularly Ta ₂ O ₅ ), and niobium oxide (particularly Nb ₂ O ₅ ). .
The vapor deposition is preferably performed by vacuum vapor deposition. Further, vapor deposition may be performed while assisting with ions such as at least one of oxygen ions and argon ions, or performing plasma treatment.
Note that a single intermediate layer or a plurality of types of first intermediate films including a hard coat film may be added between the dielectric multilayer film and the substrate, and the dielectric multilayer film is a plate-shaped substrate. When formed on both sides, the kind of the intermediate film to be added may be changed with each other, or the presence or absence of the film may be changed with each other.

In the present invention, a dielectric layer (antibacterial material layer) containing metal ion-supported zeolite is disposed as the outermost layer (the most air-side layer in the dielectric multilayer film) that is the farthest from the base material in the dielectric multilayer film. ing. In addition, an antibacterial material layer may be arrange | positioned also in layers other than the outermost layer.
The metal ion-supported zeolite is one in which metal ions are supported on zeolite (aluminosilicate) by an ion exchange reaction.
As zeolite, natural zeolite (zeolite) or artificial zeolite may be used, and various types of zeolite such as A-type, Y-type, and P-type may be used.
The metal ion supported on the zeolite is, for example, at least one of silver ion, copper ion, and copper zinc ion.
One kind of metal ion selected from these metal ions may be supported on the zeolite, but two or more kinds of metal ions may be supported. Further, as the zeolite, one metal ion-supported zeolite may be used alone, or two or more metal ion-supported zeolites may be combined.

The antibacterial material layer which is the outermost layer of the dielectric multilayer film preferably contains SiO ₂ which is a low refractive index dielectric material, since the addition of the metal ion-carrying zeolite which is an inorganic antibacterial material causes an increase in the refractive index. Yes. The SiO ₂ that is a low refractive index dielectric holds the metal ion-carrying zeolite that is a factor for increasing the refractive index, and desired optical characteristics can be easily secured.

Further, a water repellent layer may be disposed on the outermost layer in the dielectric multilayer film. In this case, the optical product is given a water repellent function in addition to the optical function and the antibacterial function.
The water repellent layer (water repellent film) is obtained by polycondensing an organic silicon compound, for example. Polycondensation enables thickening and densification of the coating, increasing the adhesion and surface hardness of adjacent layers in the optical multilayer film, and exhibiting oil repellency in addition to water repellency. It becomes easy to obtain an excellent film.
The water repellent film is formed by a known vapor deposition method or ion sputtering method.
The organosilicon compound before polycondensation is preferably a compound containing —SiR _y X _3-y (where R is a monovalent organic group, X is a hydrolyzable group, and y is an integer from 0 to 2). It is a compound having a silicon functional group. Here, as X, for example, an alkoxy group such as —OCH ₃ and —OCH ₂ CH _3, an acyloxy group such as —OCOCH ₃ , and a ketoxime group such as —ON═CR _a R _b (R _a and R _b are each 1 And a halogen group such as —Cl and —Br, and an amino group such as —NR _c R _d (R _c and R _d each represent a monovalent organic group).
As such an organosilicon compound, a fluorine-containing organosilicon compound is suitable. The fluorine-containing organic silicon compound is comprehensively excellent in water and oil repellency, electrical insulation, mold release, solvent resistance, lubricity, heat resistance and antifoaming properties. In particular, a relatively large organosilicon compound having a molecular weight of about 1000 to 50000 having a perfluoroalkyl group or a perfluoropolyether group in the molecule is excellent in antifouling properties.
A layer other than the water-repellent layer including a scratch-resistant layer may be provided on the outermost layer in the dielectric multilayer film.
Further, a second intermediate film of one or more kinds may be added between the dielectric multilayer film and the water repellent layer, and the water repellent layer is formed on both sides of the plate-like substrate. The types of intermediate films to be added may be changed with each other, or the presence / absence of a film may be changed with each other. A water repellent layer may be formed on only one of the double-sided dielectric multilayer films.

Examples belonging to the present invention and comparative examples not belonging to the present invention are shown below.
Below, various examination examples are evaluated and it is determined by the evaluation whether the examination example corresponds to an Example or a comparative example.
The following examples do not limit the scope of the invention.
Depending on the way of understanding the present invention, a part of the following examples can be substantially a comparative example, or a part of the following comparative examples can be a practical example.

<Production of study examples>
An optical multilayer film is formed by sequentially depositing various dielectric film materials on one side of a flat rectangular plate-like polycarbonate substrate having a side of 4 cm (centimeter) and a thickness of 1.0 mm (millimeter). A dielectric multilayer film was formed.
Various examination examples were prepared depending on the presence or absence of the dielectric multilayer film and the difference in the configuration of the applied dielectric multilayer film.

  In Examination Example 1, only the above-described base material is provided, and no dielectric multilayer film is provided.

In Examination Examples 2 to 10, a dielectric multilayer film based on Design Example 1 is formed on one side of the substrate. The design example 1 has a multilayer structure of all 7 layers or all 8 layers. The substrate side is the first layer, and SiO ₂ (silicon dioxide, silica) is deposited on the odd layers up to the sixth layer by vapor deposition. TiO ₂ (titanium dioxide, titania) is deposited by vapor deposition on the even layers up to the sixth layer, and SiO ₂ containing antibacterial material is deposited by vapor deposition on the seventh layer. A water repellent layer is disposed on the (outermost layer) by vapor deposition of a water repellent. The material and thickness of each layer according to design example 1 are shown in the following Table 1, and the substrate with the dielectric multilayer film of design example 1 is visible light (wavelength range is visible range (here 400 nm to 760 nm or less)). FIG. 1 shows a graph of the reflectance distribution exhibited for the light in the inner area and the light in the adjacent area. Such a reflectance distribution is that of Study Example 2, and the reflectance distributions of Study Examples 3 to 10 are not much different from those of Study Example 2.
The dielectric multilayer film according to design example 1 has a reflectance of 2% or less with respect to the entire visible range, a reflectance of 1% or less within a wavelength range of 410 nm or more and 720 nm or less, and an antireflection function (Antireflection, AR), which is an antireflection film. Of the dielectric multilayer film, the first layer to the seventh layer are mainly alternate films of a low refractive index material (SiO ₂ ) and a high refractive material (TiO ₂ ), and an antireflection function is formed. . In addition, an antibacterial function is formed by the seventh layer. Further, in the case of having the eighth layer, the eighth layer forms a water repellent function (antifouling function).

Among these, in Examination Examples 2 to 5, silver (Ag) ion-carrying zeolite is used as an antibacterial material that is a part of the material of the seventh layer of Design Example 1. In Examination Example 2, silver ion-supported zeolite was added at a ratio of 10% by weight with respect to SiO _{2 serving as} the base of the seventh layer. Similarly, in Examination Examples 3 to 5, silver ion-carrying zeolite was added in proportions of 20, 40, and 50% by weight with respect to SiO _{2 serving as} the base of the seventh layer. Examination Examples 2 to 5 have the same configuration except for the proportion of the silver ion-carrying zeolite and are not provided with a water repellent layer.
In the study examples 6 to 7, silver (Ag) ion-carrying zeolite is used as an antibacterial material, and a water repellent layer (eighth layer, outermost layer) is further provided. In Examination Examples 6 and 7, silver ion-carrying zeolite was added in a ratio of 15, 50% by weight in order with respect to SiO _{2 serving as} the base of the seventh layer. The physical film thickness of the water repellent layer is 10 nm. Here, the water repellent layer (water repellent film) is formed by vapor deposition using a fluorine-containing organosilicon compound (OF-SR manufactured by Canon Optron Co., Ltd.) as a water repellent.
Further, in Examination Examples 8 to 9, a copper (Cu) ion-carrying zeolite is used as an antibacterial material. In Examination Examples 8 and 9, copper ion-carrying zeolite was added at a rate of 15, 30% by weight with respect to SiO _{2 serving as} the base of the seventh layer, and no water-repellent layer was formed. It is.
In addition, Study Example 10 uses copper-zinc (CuZn) ion-supported zeolite as an antibacterial material. In Examination Example 10, a zeolite containing copper zinc ions was added at a ratio of 30% by weight with respect to SiO _{2 serving as} the base of the seventh layer, and no water repellent layer was formed.

In Study Examples 11 to 18, dielectric multilayer films based on Design Example 2 are formed on one side of the substrate. The design example 2 has a multilayer film structure with a total of 32 layers. The substrate side is the first layer, and TiO ₂ is deposited by vapor deposition on the odd layers up to the 31st layer, and the even layers up to the 31st layer. the SiO ₂ is disposed by vapor deposition, and is obtained by the SiO ₂ of the antimicrobial material containing place by evaporation to a 32 layer. The material and thickness of each layer according to Design Example 2 are shown in the following Table 2, and the substrate with the dielectric multilayer film of Design Example 2 shows the spectral reflectance exhibited by visible light and light in the adjacent region. A graph is shown in FIG. Such a reflectance distribution is that of Study Example 11, and the reflectance distributions of Study Examples 11 to 18 are not much different from those of Study Example 2. In Table 2, the upper stage is the first layer to the tenth layer, the middle upper stage is the eleventh layer to the twentieth layer, the middle lower stage is the twenty-first layer to the thirty layer, and the lower stage is the thirty-first layer to the thirteenth layer. There are 32 layers.
The dielectric multilayer film according to Design Example 2 has a reflectivity of about 100% in the visible region and the adjacent region in the wavelength range of 580 nm to 790 nm, and the reflectivity is several percent or less in the outer wavelength region. In addition, in the visible range, reflection of light having a wavelength of 400 nm or more and 580 nm or less is suppressed, and an optical filter having a filter function that does not transmit light having a wavelength of 580 nm or more and 760 nm or less and transmitting light on the short wavelength side in the visible range It is a film (Short Wavelength Pass Filter, SWPF).

Among these, the examination examples 11-15 use silver (Ag) ion carrying | support zeolite as an antibacterial material which is a part of material of the 32nd layer of the design example 2. In Examination Examples 11 to 15, silver ion-carrying zeolite was added in a ratio of 10, 15, 20, 40, and 50% by weight in order with respect to SiO _{2 serving as} the base of the seventh layer. In the examination examples 2 to 5, except for the ratio of the silver ion-carrying zeolite, they have the same configuration and are not provided with a water-repellent layer.
Further, in Study Examples 16 to 17, a copper (Cu) ion-carrying zeolite is used as an antibacterial material. In Examination Examples 16 and 17, copper ion-carrying zeolite was added in the order of 15, 30% by weight with respect to SiO _{2 serving as} the base of the 32nd layer, and a water-repellent layer was not formed. It is.
In addition, in Examination Example 18, a copper zinc (CuZn) ion-carrying zeolite is used as an antibacterial material. In Examination Example 18, a zeolite containing copper zinc ions was added at a ratio of 30% by weight to the SiO _{2 serving as} the base of the 32nd layer, and no water repellent layer was formed.

<Method of antibacterial test and evaluation>
An antibacterial test was performed on each of these study examples, and the antibacterial evaluation was performed based on the results.

Antibacterial tests were conducted as follows.
That is, in accordance with the antibacterial activity evaluation method (N = 1) of JIS Z2801 (2010 version), the bacterial solution of S. aureus (NBRC12732) on the surface provided with the dielectric multilayer film in each study example and A bacterial solution of Escherichia coli (NBRC 3972) was dropped, and after 24 hours ± 1 hour from the dropping, the solution was washed with 10 ml (milliliter) of the reagent, and the number of each bacterium in 1 ml was measured.
The concentration of each bacterial solution is 1/500 NB (Nutrient Broth, medium), and the dripping amount is 0.4 ml. Further, the storage environment of each of the examination examples after dropping the bacteria droplets is a temperature of 35 ° C. ± 1 ° C. and a humidity of 90% or more. Before dropping the fungus droplet, the surface of each study example was irradiated with ultraviolet rays for 10 minutes to be cleaned.

The antibacterial property was evaluated as follows as a standard as to whether the number of bacteria was suppressed as compared with the case of only the base material after the test.
That is, first, when the results of the case of only the base material (Examination Example 1) are seen, as shown in the following Table 3, the number of Staphylococcus aureus is E4 (a five-digit number, ie, 10,000 or more, 99999). The number of E. coli cells was E4 ↑ (obviously 6 or more digits). Note that Study Example 1 is Comparative Example 1 that does not belong to the present invention.

And about S. aureus, since the number of bacteria in the case of only a base material (examination example 1) is "E4", when the number of bacteria is E4 or E4 ↑, evaluation was set to C. When the number of bacteria was E3 (four-digit number) or E2 (three-digit number), the evaluation was B. Furthermore, when the number of bacteria was E1 (three-digit number), E0 (one-digit number), and when no bacteria were detected (no detection), the evaluation was A.
On the other hand, for E. coli, the number of bacteria in the case of only the base material is “E4 ↑”. Therefore, the evaluation is C when the number of bacteria is E4 ↑, and the evaluation is when the number of bacteria is E4. Was evaluated as A when the number of bacteria was E3, E2, E1, E0 and when no bacteria were detected (not detected).

<Results of antibacterial test and evaluation>
Regarding the antireflection film (design example 1), examination examples 2 to 5 (silver ion-carrying zeolite, without water-repellent layer), 6 to 7 (silver ion-carrying zeolite, with water-repellent layer), 8 to 9 (copper ion-carrying zeolite) ), 10 (copper zinc ion-supported zeolite), the number of bacteria or antibacterial evaluation is shown in the following Tables 4 to 7 in order.
Furthermore, regarding the optical filter membrane (design example 2), the number of bacteria or the antibacterial evaluation in the examination examples 11-15 (silver ion-carrying zeolite), 16-17 (copper ion-carrying zeolite), 18 (copper zinc ion-carrying zeolite) Are shown in the following Tables 8 to 10 in order.

In Study Example 2 (Design Example 1, no water-repellent layer, silver ion-carrying zeolite 10 wt%), as shown in Table 4, the number of Staphylococcus aureus is “E0” and the number of Escherichia coli is “not detected” The evaluation is “A” in all cases.
In Study Examples 3 and 4 (silver ion-carrying zeolite 20, 40 wt%), the number of Staphylococcus aureus was “E2” and the number of Escherichia coli was “E4”. It is.
In Study Example 5 (silver ion-carrying zeolite 50 wt%), the number of Staphylococcus aureus was “not detected”, the number of Escherichia coli was “E2”, and the evaluation was “A”.
If neither S. aureus evaluation nor E. coli evaluation is “C”, the antibacterial property is higher for at least one of the bacteria compared to the state of the substrate alone (Examination Example 1).
Therefore, the examination examples 2 to 5 are the examples 1 to 4 belonging to the present invention.

In Study Example 6 (Design Example 1, with water-repellent layer, silver ion-carrying zeolite 15 wt%), as shown in Table 5, the number of Staphylococcus aureus was “E3” and evaluated “B”. The number of bacteria is “not detected” and the evaluation is “A”.
In Study Example 7 (silver ion-carrying zeolite 50 wt%), the number of Staphylococcus aureus was “not detected”, the number of Escherichia coli was “E0”, and the evaluation was “A”.
Therefore, the study examples 6 and 7 are the examples 5 and 6 belonging to the present invention.

In Study Examples 8 and 9 (Design Example 1, no water-repellent layer, copper ion-carrying zeolite 15, 30 wt%), as shown in Table 6, both the number of Staphylococcus aureus and the number of Escherichia coli Is also “not detected” and is evaluated “A”.
Therefore, the examination examples 8 and 9 are the examples 7 and 8 belonging to the present invention.

In Study Example 10 (Design Example 1, no water-repellent layer, copper / zinc ion-supported zeolite 30 wt%), as shown in Table 7, the number of E. coli cells is “E4 ↑” and the evaluation is “C”. The number of Staphylococcus aureus is “E1” and the evaluation is “A”.
Therefore, the examination example 10 is Example 9 belonging to the present invention.

In Study Examples 11 to 15 (Design Example 2, no water repellent layer, silver ion-carrying zeolite 10, 15, 20, 40, 50 wt%), as shown in Table 8, the number of Staphylococcus aureus bacteria is all The evaluation is “A” when “E1” or “not detected”, and the evaluation is “A” when the number of E. coli is “E3”, “E1”, or “not detected”.
Therefore, all of the examination examples 11 to 15 are Examples 10 to 14 belonging to the present invention.

In Study Examples 16 and 17 (Design Example 2, no water-repellent layer, copper ion-carrying zeolite 15, 30 wt%), as shown in Table 9, both the number of Staphylococcus aureus and the number of Escherichia coli Is also “not detected” and is evaluated “A”.
Therefore, the examination examples 16 and 17 are Examples 15 and 16 belonging to the present invention.

In Study Example 18 (Design Example 2, no water-repellent layer, copper / zinc ion-carrying zeolite 30 wt%), as shown in Table 10, the number of E. coli cells was “E4”, the evaluation was “B”, and yellow The number of staphylococci is “not detected” and the evaluation is “A”.
Therefore, the examination example 18 is Example 17 belonging to the present invention.

<Summary>
As described above, in the examination examples 2 to 10 (examples 1 to 9) according to the design example 1, the base material (consideration example 1) and the four low refractive index dielectric layers (SiO 2) formed on the surface of the base material. A dielectric multilayer film including _two layers, a metal ion-carrying zeolite-containing layer) and three high-refractive-index dielectric layers (TiO ₂ layers), and the layer farthest from the base material in the dielectric multilayer film As the outermost layer (seventh layer), a dielectric layer containing metal ion-supported zeolite (antibacterial material) is disposed.
Therefore, in the examination examples 2 to 10, the antireflection function is secured by the dielectric multilayer film, and the antibacterial property is secured by the layer containing the metal ion-carrying zeolite. Since the metal ion-supported zeolite is an inorganic antibacterial material that is more resistant to heat than an organic antibacterial material and has little change with time, it exhibits an antibacterial effect stably over a longer period of time than an optical product containing the organic antibacterial material.
In addition, the layer containing the metal ion-carrying zeolite is the outermost layer of the dielectric multilayer film having the antireflection function, and therefore the antibacterial material-containing layer is disposed as close to the surface of the optical product as possible. The product has excellent antibacterial properties.
Furthermore, if the metal ion-carrying zeolite-containing layer is disposed only in the outermost layer of the dielectric multilayer film, the influence on the optical performance such as increase in transmittance due to the inclusion of the metal ion-carrying zeolite is limited.

Further, in Examination Examples 11 to 18 (Examples 10 to 17) according to Design Example 2, the base material (Exploration Example 1) and 16 low refractive index dielectric layers (SiO ₂ ) formed on the surface of the base material. A dielectric multilayer film including a high-refractive index dielectric layer (TiO ₂ layer) and a dielectric multilayer film including a metal ion-carrying zeolite-containing layer), and a layer farthest from the base material in the dielectric multilayer film. As a certain outermost layer (32nd layer), a dielectric layer containing metal ion-supported zeolite (antibacterial material) is disposed.
Therefore, in Study Examples 11 to 18, the optical filter function is ensured by the dielectric multilayer film, and the antibacterial property is ensured by the layer containing the metal ion-carrying zeolite with high heat resistance and little change with time.
In addition, since the layer containing the metal ion-supporting zeolite is the outermost layer of the dielectric multilayer film having an antireflection function, the optical product has excellent antibacterial properties, and only the outermost layer of the dielectric multilayer film has metal. If the ion-carrying zeolite-containing layer is disposed, the influence on the optical performance such as a slight decrease in the transmittance due to the inclusion of the metal ion-carrying zeolite is suppressed.

Further, the metal ion-supported zeolite is a silver ion-supported zeolite (Study Examples 2 to 7, 11 to 15), a copper ion-supported zeolite (Study Examples 8 to 9, 16 to 17), or a copper zinc ion-supported zeolite (Study Example 10). , 18). Therefore, it becomes easy to form the metal ion-carrying zeolite-containing layer at a lower cost.
In Study Examples 2 to 18, the outermost dielectric layer includes SiO ₂ . Therefore, the metal ion-carrying zeolite-containing layer is stabilized, and the desired optical characteristics (antireflection characteristics and optical filter characteristics) are obtained because it contains the metal ion-carrying zeolite that is a factor of increasing the refractive index by SiO ₂ that is a low refractive index dielectric. Etc.) is easily secured.
The optical product according to claim 1 or 2, characterized in that
In addition, each of Examination Examples 6 to 7 includes a water repellent layer exhibiting water repellency, and the water repellent layer is on the outermost layer (seventh layer) of the dielectric multilayer film (antireflection film) (eighth). Layer). Therefore, in the examination examples 6-7, in addition to an optical function and an antibacterial function, a water-repellent function (antifouling function) is provided.
In Study Examples 6 to 7, the water repellent layer is a fluorine-containing organosilicon compound. Therefore, the water-repellent layer (antifouling layer) is excellent in water and oil repellency, electrical insulation, release properties, solvent resistance, lubricity, heat resistance and antifoaming properties.

Claims (5)

A substrate;
A dielectric multilayer film including one or more low refractive index dielectric layers and one or more high refractive index dielectric layers formed on the surface of the substrate;
With
An optical product, wherein a dielectric layer containing metal ion-supported zeolite is disposed as an outermost layer that is the farthest layer from the substrate in the dielectric multilayer film. The optical product according to claim 1, wherein the metal ion-supported zeolite is at least one of silver ion-supported zeolite, copper ion-supported zeolite, and copper zinc ion-supported zeolite. The optical product according to claim 1, wherein the dielectric layer of the outermost layer contains SiO ₂ . Furthermore, it has a water repellent layer that exhibits water repellency,
4. The optical product according to claim 1, wherein the water repellent layer is disposed on the outermost layer in the dielectric multilayer film. The optical product according to claim 4, wherein the water repellent layer is a fluorine-containing organosilicon compound.

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