JPH0961602A - Plastic optical articles having antireflection film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide optical articles adequate for mounting on the front surface of a liquid crystal display plate (LCD), cathode ray tube of a television or computer and other display screens, etc., and a more specific process for producing the same. SOLUTION: Antireflection films satisfying the following requirements (1), (2), (3) are formed on the surface layers of one or both surfaces of a base material consisting of a plastic film or sheet. (1) The film or sheet is sized to include a rectangular shape of 230×300m therein. (2) The surface reflectivity does not exceeds 1% in a visible ray region of a range of a wavelength of 450 to 650nm. (3) The color difference at the arbitrarily selected two points of distances of >=210mm within the film or sheet surface is <2.50 and the difference in the surface reflectivity measured at a wavelength 520nm is <0.1%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid crystal display panel (LC).
D), cathode ray tube (CRT) of TV computer
An optical article that is mounted on the front surface of other display screens and has an antireflection property with uniform in-plane optical characteristics for the purpose of minimizing fatigue of eyes and spirits of a person who works or observes in front of the device. Regarding

[0002]

2. Description of the Related Art From the viewpoint of utilizing the flexibility and impact resistance (hard to break, etc.) of a plastic film with respect to glass, a transparent plastic film is formed by optically calculating and designing transparent substances having different refractive indexes. There have already been proposed several antireflection films which are formed in a thick and multi-layered structure and have reduced light reflection, and manufacturing methods thereof. The formation of an antireflection film on glass by a vapor deposition method has been performed for a long time, and it can be said that the technique for forming an antireflection film on glass is almost applied to the development of a plastic film. In that case, we added many new technologies to compensate for the drawbacks of plastic films against glass, such as scratches, and applied many patents for technologies related to antireflection on plastic films and products using them. Proposed. JP-A-60-144702, 61
Examples are -245449, 61-245449, and JP-A-6-130204. In these cases, the formation of the antireflection film itself is
Since it is performed as an extension of that of glass, it is only necessary to form an antireflection film on the surface of an object with a small area such as a lens, so non-uniformity of optical performance in the plane does not become a problem, and In addition, the positional relationship between the surface of the article to be processed and the vapor deposition source is such that the elapsed time for forming the vapor deposition layer is fixed. In this case, the evaporation diffusion of the evaporation material from the evaporation source is 1
Form a cone with the evaporation source point as the apex for the evaporation source,
Since the deposition surface is placed in it, if the area becomes large, the deposition angle (angle between the deposition surface and the direction of diffusion collision of the deposition material) of each part will inevitably differ, and strictly speaking Physical properties will have a distribution depending on the location. That is, the refractive index has a distribution, and as a result, a reflectance distribution and a color distribution due to light interference naturally occur. Film formation from a plurality of vapor deposition sources or film formation while rotating or displacing an object to be vapor-deposited is a countermeasure against this, and is actually implemented. However, in these methods, the in-plane uniformity of the optical properties is not sufficient as the surface to be vapor-deposited becomes large, and as a result,
When it is used by being attached to the display surface, the human eyes and nerves are tired due to the influence of uneven reflectance and color patterns of interference. JP-A-60-17421 discloses a transparent conductive film in which a transparent conductive layer is provided on a light-transmitting substrate, and an antireflection layer comprising substantially the same component is provided.
A transparent conductive film is proposed in which the refractive index of the layer is changed stepwise and / or continuously in the thickness direction, and as a specific method for producing it, in a vacuum, A method of forming a multi-layered film having a different refractive index for each layer by changing a vapor deposition condition for each pass with a vapor deposition substance of one component while repeatedly running (reciprocating) a transparent film a plurality of times. However, in this case, since the vapor deposition material is a single component, the range of refractive index that can be selected is narrow, and as shown in the examples, the reflectance in the visible light region is 1% or more, which is extremely unsatisfactory. Further, no consideration has been given to the in-plane uniformity of optical characteristics.

Under such circumstances, in order to obtain an optical article having an antireflection property with uniform in-plane optical characteristics, a plastic having a certain size or more and an antireflection property with uniform in-plane optical characteristics. The realization of films or sheets is highly desirable.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display (LCD), a cathode ray tube (CRT) of a television computer, and other display screens on the front surface, in which the above-mentioned various problems are solved. An object of the present invention is to provide an optical article suitable for mounting and a specific manufacturing method thereof.

[0005]

In order to achieve the above object, the present invention has the following arrangement. A. A transparent dielectric having a refractive index lower than that of the plastic film or sheet and a refractive index of the plastic film or sheet are provided on one or both surface layers of a substrate made of the plastic film or sheet. An antireflection film that satisfies the requirements (1), (2), and (3) below, in which an antireflection film composed of three or more layers is formed by combining with a transparent dielectric or transparent conductor having a higher refractive index. A plastic optical article having: (1) The size of the film or sheet is 230mm x 3
(2) The surface reflectance of the surface on which the antireflection film is formed should not exceed 1% in the visible light range of wavelength 450nm-650nm (3) ) 210 arbitrarily selected in film or sheet plane
CIE standard C light source (JIS
Z8113-2038) dominant wavelength from the reflectance curve (JIS
Z8105-2041) chromaticity diagram (JI Z8113-2046) color difference (JIS Z8105-2070) △ E ^* _ab = [(△ L ^* ) ² +
(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 is less than 2.50, and the difference in the surface reflectance measured at a wavelength of 520 nm at two points arbitrarily selected at a distance of 210 mm or more is: 0.
Be less than 1% B. The plastic film or sheet base material has a tensile elastic modulus of 100 to 450 kg / mm ^{2 in} the range of flexibility. The surface of the film or sheet has a pencil hardness of 2H or more and a scratch resistance of 1 to 15 μm. A plastic optical article having the antireflection film as described in A above, which is formed by forming a hard coat layer having C. A plastic optical article having the antireflection film according to A above, which has a surface resistance of 3 KΩ or less measured on the antireflection film side. D. A film or sheet in which the plastic film or sheet base material is one or a composite of a polyester resin, a polycarbonate resin, a methacrylic resin, a fluorine resin, and a triacetate resin. A plastic optical article having the antireflection film as described in A above. E. FIG. Further, a thickness of 1 nm to 20 nm on the antireflection layer
In the above range, the plastic optical article having the antireflection film as described in A above, which is provided with a water-repellent / oil-repellent transparent layer having a water contact angle of 60 deg or more. F. While continuously running the plastic film or sheet in a vacuum, the transparent dielectric having a refractive index lower than that of the plastic film or sheet and higher than the refractive index of the plastic film or sheet. In combination with a transparent dielectric or transparent conductor with a refractive index,
An antireflection film having a uniform in-plane optical property distribution satisfying the following requirements (1), (2), and (3) is formed by forming an antireflection film composed of three or more layers by the vapor deposition method. A method for manufacturing a plastic optical article. (1) The size of the film or sheet is 230mm x 3
The size should be larger than that which can include a 00 mm rectangle. (2) The surface reflectance of the surface on which the antireflection film is formed does not exceed 1% in the visible light region of wavelength 450 nm to 650 nm ( 3) 210 selected arbitrarily in the film or sheet plane
CIE standard C light source (JIS
Z8113-2038) dominant wavelength from the reflectance curve (JIS
Z8105-2041) chromaticity diagram (JI Z8113-2046) color difference (JIS Z8105-2070) △ E ^* _ab = [(△ L ^* ) ² +
(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 is less than 2.50, and the difference in the surface reflectance measured at a wavelength of 520 nm at two points arbitrarily selected at a distance of 210 mm or more is: 0.
Less than 1%

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.

The surface of the plastic film or sheet is appropriately combined with a transparent material having a high refractive index, a medium refractive index and a low refractive index, and their optical thickness (n × d: refractive index,
A technique has already been proposed for manufacturing an antireflection film by laminating (d: absolute thickness) to a thickness under a calculated design. This lamination is performed by evaporating or sputtering these substances in vacuum and depositing them on the surface of the plastic substrate. In the present invention, this method is generally learned and generally referred to as a vapor deposition method.

The object of the present invention is to have a certain size or more among various display screens, specifically 230 mm × 300.
It is an object of the present invention to provide an antireflection film which is attached to a display having a size that can include a rectangle of mm by a method such as adhesion so as not to give fatigue to what is viewed and which ensures a uniform vision over the entire screen. In the case of a large screen, the optical non-uniformity of the surface is easy to feel, and it is very difficult from the viewpoint of manufacturing technology. It is strongly desired that the uniformity of the reflectance and the color tone is within the entire surface. Specifically, the chromaticity difference ΔE ^* _ab 2 on the chromaticity diagram at the dominant wavelength from the reflectance curve measured by the C light source at two points within the plane, arbitrarily selected at a distance of 210 mm or less, is When the difference between the surface reflectances measured at wavelengths in the visible light range at two points of less than 2.50 and arbitrarily selected at a distance of 210 mm or more is less than 0.1%, visually unevenness is felt. The degree is small, and there is little feeling of fatigue even after continuous use. Further, when the surface reflectance exceeds 1% in the visible light range, the original image becomes significantly difficult to see due to the reflection of external light.

[0009] In order to obtain an antireflection plastic film having a uniform size over a certain size, which meets the above requirements, the vapor deposition method is indispensable, and the film is continuously produced during production. It is necessary that the entire surface of the film is exposed to the same conditions with respect to the running direction by running the film in the same direction, and it could not be achieved by actually examining various other methods. Regarding one direction of the film (for example, the width direction), the arrangement of a plurality of crucibles for vaporizing the vapor deposition material in the vapor deposition method or the target in the sputtering.
Uniformity of performance can be realized by designing the shape and arrangement of the get, and specifically, a plurality of crucibles are arranged in the same evaporation system. In the other direction (for example, the longitudinal direction and the traveling direction), the traveling system becomes ideal when it is attempted to achieve the uniformity of the optical performance at the same time. It is understood that the uniformity can be achieved not only for 300 mm but also for an unlimited size (length, for example, hundreds of meters) in terms of the unit of the size of the display screen. The present invention has been achieved by such a novel method.

The plastic film or sheet used in the present invention is required to have a certain degree of flexibility and firmness because it needs to be continuously run to form a multilayer film on the surface by vapor deposition. Specifically, it is preferable that the tensile elastic modulus is in the range of 100 to 450 kg / mm @ 2. Specifically, a film or sheet made of one or a composite of polyester resin, polycarbonate resin, methacrylic resin, fluorine resin and triacetate resin can be used. . Further, since the product according to the present invention is assumed to be mounted on the entire surface of various display screens, it is possible to touch various articles (cloth, dust such as sand, nails, pencil lead, etc.) in an environment of daily use. Or, it is desirable that it is not easily scratched by being rubbed. For that purpose, a flexible soft plastic surface is coated with a hard film having a thickness of 1 to 15 μm,
That is, it is desirable to coat with a hard coat layer. The hardness of the coating is preferably at least 2H in terms of pencil hardness. Specifically, polyorganosiloxane, silica,
Inorganic oxide resins such as alumina or organic polyfunctional acrylic resins can be effectively used, but other transparent resins having sufficient hardness may also be used. In addition, as a method for forming these hard coat layers, a vacuum vapor deposition method,
Any of the commonly used methods such as a so-called wet coating method in which a solution is applied / dried is possible. To obtain a film with sufficient hardness, it is generally 1μ
Since a thickness of m or more is required, it is preferable to use the wet coating method from the viewpoint of productivity. In that case, an organic acrylic type is easy to select, and an acrylic compound such as methacrylic acid and a polyfunctional alcohol are easily selected. A method of forming a film by crosslinking an ester compound with a vinyl ester is preferably used.

In order to improve the adhesion between the hard coat layer and the base film, a thin anchor having a thickness of about 2 μm or less is used.
Providing a coat layer is preferably performed. In that case, depending on the kind of the resin of the substrate, generally, an acrylic resin or a polyester resin is used, and either an in-line method or an off-line method at the time of manufacturing the substrate film can be adopted. .

Next, the formation of a multilayer antireflection film will be described. The principle of a general multilayer antireflection film and the film forming method thereof are already known, and various methods and examples are introduced according to various purposes. Although it is impossible to enumerate too many examples of the known art, it is basically the case of the base film, and in the case of the present invention, the anchor.
A transparent compound having a refractive index smaller than that of the base film including the coat layer and hard coat layer, a transparent compound having a refractive index higher than that of the base film, and an intermediate Constituting multiple layers of compounds with different refractive indices with an optical film thickness (product of refractive index n and absolute thickness d) designed to bring the total reflectance to a value close to the minimum. Consists of. At this time, the specific content of the multilayer structure varies depending on the purpose of use, the allowable cost for production, and the film-forming method that can be adopted for production.

In the present invention, a wide range of visible light,
Specifically, one requirement is that the reflectance does not exceed 1% at least in the wavelength range of 450 nm to 650 nm. It has been found that this cannot be achieved by a coating made of a single substance, and cannot be stably achieved unless a high-refractive substance and a low-refractive substance are combined to form a multilayer structure of at least three layers.

Further, as a preferred requirement of the present invention, the antireflection film or sheet according to the present invention has a certain degree of conductivity, shields an electromagnetic wave from a main body of a display device having a display, and also adheres dust due to static electricity. Is desirable. Specifically, the surface resistance measured on the antireflection film surface is preferably 3 KΩ or less. As an economical and most practical means for achieving both the conductivity and the low reflectance, the layer containing ITO as a main component is used as one component of the multilayer film. ITO is a mixture of tin oxide and indium oxide, but in general, a tin oxide content of 5 to 20% can be preferably used from the viewpoint of both transparency and conductivity. IT
O has a refractive index in the range of 1.9 to 2.1 and can be used as a high refractive index film having a structure of a multilayer antireflection film. From the viewpoint of conductivity, the thicker the ITO layer is, the more preferable it is, but from the viewpoint of reflectance, the thickness is close to the specific thickness (though not necessarily one) required by the optical theory for the target wavelength. Must.

Including the requirement of conductivity, the constituent materials of the multilayer film usable in the present invention include high refractive index materials such as zirconium oxide, titanium oxide, tungsten oxide, molybdenum oxide, hafnium oxide, tantalum oxide,
Cerium oxide, indium oxide, tin oxide, zinc oxide,
Examples include ITO and a mixture thereof. Examples of the low refractive index substance include magnesium fluoride, silicon oxide, aluminum fluoride, lithium fluoride and a mixture thereof. Aluminum oxide can be used as a material having an intermediate refractive index.

As a method for forming the above-mentioned multi-layered antireflection film, a method generally called an evaporation method, that is, a sputtering method, an evaporation method by an electron gun heating method, an ion plating method and the like can be used. Further, in the case of a vapor deposition method using an electron gun heating system, it is also preferable to activate the vaporized compound by ionization such as ionization during the vapor deposition so as to enhance the adhesion of each layer.

Needless to say, it is very important to control the film thickness in forming the antireflection film, but in reality, the optical film thickness ( _ni x
d _i , i = 1 to integer, n _i : refractive index of the _i -th layer, d _i = thickness of the i-th layer) are monitored using an optical film thickness meter, and the measured values are set as vapor deposition conditions. It is preferable to form the film while feeding back.

As a most preferred embodiment of the present invention, a water-repellent transparent layer having a thickness of 1 nm to 20 nm and a water contact angle of 60 deg or more is further provided on the multilayer antireflection layer. An optical article made of plastic having the multilayer antireflection film of the first range is mentioned. This is because when the product according to the present invention is used by being attached to the surface of a display, the product is placed in various use environments other than the original intended use to make the surface less susceptible to stains. Substances that cause dirt include lipstick, coffee,
This can be achieved by providing a water-repellent and oil-repellent coating on the assumption of magic ink, mayonnaise, .... Various methods can be used as a specific method for forming the water-repellent and oil-repellent coating film.
A method of polymerizing a compound having a small surface energy such as fluoroalkylsilane as shown in -122776 by chemical bonding on the surface of the outermost layer of the antireflection film layer is mentioned. It is convenient to use the contact angle of water as a measure of antifouling performance, and when the contact angle of water is 60 deg or more, it is effective against the above-mentioned causes of contamination, and more preferably, When the contact angle is 90 deg or more, a remarkable antifouling effect can be exhibited. More specific coating methods and effects will be described in the section of Examples.

As one aspect of the present invention, as a means for making the most effective use of the conductive performance, a multilayer antireflection film is formed by exposing a part of a transparent conductive layer having a multilayer structure, and the multilayer antireflection film is exposed from that surface. -It is desirable to take a ground electrode. In this case, as an effective exposed surface for taking the electrode, a width of 5 to 25
It is desirable that the film is exposed for at least 10 mm and a length of 10 mm. The length does not matter even if it extends over the entire length of the product. Especially when this product is made as a continuous long product, the product exposed over the entire length in the length direction from the aspect of the manufacturing process. Easy to make. That is, it can be easily achieved by forming an ITO layer in a vapor deposition step, mounting an adhesion preventing plate corresponding to a portion to be exposed, and providing a subsequent layer. Of course, instead of such a method, a method of chemically or physically etching layers after the ITO layer after forming the entire multilayer film is also possible.

The thus obtained optical article according to the present invention has desired in-plane optical uniformity, antireflection property, preferable conductivity, moderate surface hardness that does not easily scratch the surface, and further When a water-repellent coating is provided, it not only provides high antifouling property, but also has practical physical properties such as adhesion, weather resistance, abrasion resistance, and crack resistance.

[0021]

EXAMPLES The embodiments of the present invention will be described below with reference to examples, but the invention is not limited thereto.

Common manufacturing conditions and methods for measuring physical properties will be described throughout the examples. [Production of Base Film and Hard Coat Layer] The base film was coated with an amorphous polyester resin in a thickness of 0.5 to 0.8 μm online during film formation.
An 8 μm polyethylene terephthalate (hereinafter abbreviated as PET) film was used. The hard coat layer is a polyfunctional acrylate (erythritol type,
Polyester-based, hydroxypropyl-based mixture), surface smoothing agent (polysiloxane), photoinitiator (phenylketone compound) in toluene, methylethylketone mixed solvent solution is applied, and after drying, the crosslinking reaction is completed by UV irradiation. This gives a pencil hardness of 3H and a thickness of 4.0 μm.
Was formed. [Formation of Antireflection Film] The formation of the antireflection film was performed by partially performing RF ion plating on all five layers by using a continuous winding type vacuum vapor deposition apparatus using EB (electron gun) heating as an evaporation energy source. The film thickness of each layer can be adjusted to the optical film thickness (n ×
While d) was measured and controlled online, each layer was formed while the film was running at an appropriate speed calculated from the required film thickness. For ITO and ZrO _2, after setting conditions of vacuum degree of about 5 × 10 ^-5 Torr, oxygen is introduced to partial pressure of oxygen.
1.1 x 10 ^-4 Torr, high frequency (13.56MHz) 1.5K
A film was formed under the conditions of a plasma atmosphere in which W was applied. SiO ₂
Is oxygen partial pressure 2.0 × 10 ^-4 Torr, high frequency (13.56MHz
) Under the condition of 0.5 kW, MgF ₂ has an oxygen partial pressure of 9.0 × 10
^The film was formed under the conditions of ⁻⁵ Torr and high frequency (13.56 MHz) 0.2 KW. [Formation of water-repellent layer] The water-repellent layer is formed by using (heptadecafluoro-1,1,2,2-tetrahydrodecyl) -1-trimethoxysilane as a vapor to form a discharge electrode in a vacuum device.
Introduced into the environment where 00W high frequency plasma is generated, 5
It was performed by reactively forming a film with a thickness of 20 nm on the surface of the film on which the antireflection film composed of layers was formed.
The contact angle of the obtained product was in the range of 102 ° to 110 °. Example 1 A continuous long film having a width of 500 mm and a thickness of 188 μm PET film provided with a hard coat layer of 4 μm on one side was provided with an antireflection film composed of the following 5 layers from the second layer to the sixth layer. The film was formed by the method described above.

Constituents Optical film thickness (n × d) Running speed (m / min) Second layer ITO 0.061λ 2.0 Third layer SiO ₂ 0.089λ 4.0 Fourth layer ITO 0.539λ 2. 0 5th layer MgF ₂ 0.192λ 2.0 6th layer SiO ₂ 0.050λ 4.0 (λ = 520 nm: set wavelength) The surface hardness of the obtained product on the antireflection film side is 3 in terms of pencil hardness.
H. In addition, as a result of measuring the reflectance in the visible light region on the antireflection film side by performing a completely black treatment so that the reflection on the surface without the antireflection film is observed, the reflectance in the range of 420 nm to 710 nm is It was 1% or less.

Further, 10 m of this continuous long film was sampled, and at intervals of 1 m, two sheets in the width direction and one sheet in the length direction (in the end, two sheets from the material of 500 × 1000 mm) 230 m
A total of 20 m × 300 mm samples were sampled, and as shown in FIG. 1, 10 measurement points (A1, A2, A3, A) were measured for each sample.
4, A5, B1, B2, B3, B4, B5; The distance of Ai Bi is 210
mm) was set, and the reflectance and chromaticity were measured at each point (total of 200 points). As a result, for each sample, Ai Bj (i,
j = 1 to 5), the maximum difference in reflectance at a wavelength of 520 nm is less than 0.1% (the maximum difference among the 20 samples is 0.08%). The maximum difference in chromaticity at the dominant wavelength was less than 2.50 (1.86 in the maximum difference among the 20 samples). When this film product was attached to a 15-inch CRT with an appropriate adhesive and normal computer operation was continued, fatigue of eyes and nerves was not felt so much, and it was significantly larger than that of Comparative Example 1 below. It turned out to be relaxed. [Comparative Example 1] Using the same materials (base material and vapor deposition material) as in Example 1, the vapor deposition of each layer was stopped without traveling the base material, and the optical film thickness at the central portion of the deposition area was adjusted. A film was formed under the same conditions as in Example 1 except that the time was set so that the thickness was the same as in Example 1. A 230 mm x 300 mm sample is cut out with the center of the deposition area as the center of the sample.
The same 10 measurement points as in Example 1 were set, and the reflectance and chromaticity were measured at each point. As a result, the reflectance at the center is 42
The reflectance was 1% or less in the range of 0 nm to 710 nm. However, between the measured values between Ai and Bj (i, j = 1 to 5), the maximum difference in reflectance at the wavelength of 520 nm is 0.2%, and the maximum difference in chromaticity at the main wavelength is 6.80. there were. Using a sample made in the same manner and having almost the same degree of non-uniformity in optical performance, it was mounted on a 15-inch CRT with an adhesive in the same manner as in Example 1, and a normal personal computer operation was performed. When continued, fatigue of eyes and nerves was considerably larger than in the case of Example 1. However, even in this case, as compared with the case where the antireflection film is not attached, the external light reflection on the display screen is very small and the eye fatigue is small.

[0025]

As described in detail above, the film or sheet provided with an antireflection film having excellent uniformity of in-plane optical performance according to the present invention is mounted on various displays and is provided on the front surface of the display. The eyestrain and nerve fatigue of the operator can be minimized. In addition, it has the effect of preventing scratches on the surface and stains by various substances during daily use, and also has the effect of shielding the electromagnetic waves emitted from the display body, which is a working environment for computer-related office workers. It can be applied to the display of video equipment used indoors and outdoors, and can be installed on the glass surface of the frame of a show window or a work of art to enhance the display effect of products and exhibits. It can be expected to be used in a very wide range.

[Brief description of drawings]

FIG. 1 shows reflectance and chromaticity measurement points.

[Explanation of symbols]

 * Indicates a measurement point of reflectance and chromaticity. A1 to A5 are position names of reflectance and chromaticity measurement points. B1 to B5 are position names of reflectance and chromaticity measurement points.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Riki Aoyagi 33-1 Nagabushi, Mishima City, Shizuoka Prefecture Toyo Metallizing Co., Ltd. Mishima Plant

Claims (6)

[Claims] 1. A transparent dielectric material having a refractive index lower than that of the plastic film or sheet and a plastic film or sheet are provided on one or both surface layers of a substrate made of the plastic film or sheet. -Requirements (1), (2), (3) below, in which an antireflection film consisting of three or more layers is formed by combining a transparent dielectric or transparent conductor having a refractive index higher than that of A plastic optical article having an antireflection film satisfying the above requirements. (1) The size of the film or sheet is 230mm x 3
(2) The surface reflectance of the surface on which the antireflection film is formed should not exceed 1% in the visible light range of wavelength 450nm-650nm (3) ) 210 arbitrarily selected in film or sheet plane
CIE standard C light source (JIS
Z8113-2038) dominant wavelength from the reflectance curve (JIS
Z8105-2041) chromaticity diagram (JI Z8113-2046) color difference (JIS Z8105-2070) △ E ^* _ab = [(△ L ^* ) ² +
(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 is less than 2.50, and the difference in the surface reflectance measured at a wavelength of 520 nm at two points arbitrarily selected at a distance of 210 mm or more is: 0.
Less than 1% 2. A plastic film or sheet base material having a flexibility in the tensile modulus of elasticity of 100 to 450 kg / mm ² has a pencil hardness of 2H or more and a thickness of 1 to 1 on the surface of the sheet or sheet. The plastic optical article having an antireflection film according to claim 1, wherein a hard coat layer having a scratch resistance of 15 μm is formed. 3. The surface resistance measured on the antireflection film side is 3K.
The plastic optical article having the antireflection film according to claim 1, which has an Ω or less. 4. The plastic film or sheet base material comprises one or a composite of polyester resin, polycarbonate resin, methacrylic resin, fluorine resin and triacetate resin. A plastic optical article having an antireflection film according to claim 1, which is a film or a sheet. 5. A thickness of 1 nm or more is further formed on the antireflection layer.
The plastic optical article having an antireflection film according to claim 1, wherein a water-repellent / oil-repellent transparent layer having a contact angle of water of 60 deg or more in the range of 20 nm is provided. 6. A transparent dielectric having a refractive index lower than that of the plastic film or sheet and the plastic film or sheet while continuously running the plastic film or sheet in a vacuum. In combination with a transparent dielectric or transparent conductor having a refractive index higher than that of above, an antireflection film composed of three or more layers is formed by a vapor deposition method, and the following (1), (2), (3 ) A method for producing a plastic optical article having an antireflection film, which has a uniform in-plane optical property distribution satisfying the requirement (4). (1) The size of the film or sheet is 230mm x 3
The size should be larger than that which can include a 00 mm rectangle. (2) The surface reflectance of the surface on which the antireflection film is formed does not exceed 1% in the visible light region of wavelength 450 nm to 650 nm ( 3) 210 selected arbitrarily in the film or sheet plane
CIE standard C light source (JIS
Z8113-2038) dominant wavelength from the reflectance curve (JIS
Z8105-2041) chromaticity diagram (JI Z8113-2046) color difference (JIS Z8105-2070) △ E ^* _ab = [(△ L ^* ) ² +
(Δa ^* ) ² + (Δb ^* ) ² ] ^1/2 is less than 2.50, and the difference in the surface reflectance measured at a wavelength of 520 nm at two points arbitrarily selected at a distance of 210 mm or more is: 0.
Less than 1%