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Antireflection film

An anti-reflection and thin-film technology, which is applied in optics, instruments, optical components, etc., can solve the problem of easy coloring of reflection hue and achieve excellent reflection characteristics

Pending Publication Date: 2020-05-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem that the reflective hue tends to be colored if the light reflectance is lowered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] (production of transparent base material)

[0094] 100 parts by weight of urethane acrylate resin (manufactured by Dainippon Ink Chemical Industry Co., Ltd., trade name "UNIDICV4025", refractive index: 1.52), as inorganic particles, nano-silica particles (manufactured by Nissan Chemical Industry Co., Ltd., trade name " MEK-ST-L", 50 parts by weight of the average particle diameter (50nm), and 5 parts by weight of the brand name "Irgacure 184" manufactured by BASF Corporation as a UV initiator were mixed. Next, a mixed solution of MEK and PGM as a diluting solvent was added to the above-mentioned solution, and the solvent ratio was adjusted so that MEK / PGM=40 / 60, and the composition for hard-coat layer formation was obtained.

[0095] The composition for forming a hard coat layer was applied to one side of a resin film (TAC: manufactured by Fuji Film Co., Ltd., trade name "TD80UL") so that the thickness after drying was 5 μm, and dried at 80° C. for 2 minutes. Then use ...

Embodiment 2～6、 comparative example 1～6

[0105] will first Nb 2 o 5 layer, the first SiO 2 layer, second Nb 2 o 5 layer, the second SiO 2 Except that the thickness of the layer and the antifouling layer was set to the thickness shown in Table 1, it carried out similarly to Example 1, and obtained the antireflection film. The obtained antireflection film was subjected to the above-mentioned evaluation. The results are shown in Table 1.

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Abstract

The invention provides an antireflection film that has excellent reflection characteristics (low reflection) in broadbands and has suppressed coloring. The antireflection film comprises a transparentsubstrate, an adhesive layer, a first Nb2O5 layer, a first SiO2 layer, a second Nb2O5 layer, a second SiO2 layer and an anti-fouling layer, wherein the first Nb2O5 layer, the first SiO2 layer, the second Nb2O5 layer, the second SiO2 layer and the anti-fouling layer are orderly arranged from the transparent substrate. The first Nb2O5 layer is 28 nm to 33 nm in optical film thickness. The first SiO2layer is 43nm-57 nm in optical film thickness. The second Nb2O5 layer is 264-288 nm in optical film thickness. The second SiO2 layer is 11 nm -129 nm in optical film thickness.

Description

technical field [0001] This invention relates to antireflection films. Background technique [0002] Conventionally, in order to prevent reflection of external light on display screens such as CRTs, liquid crystal display devices, and plasma display panels, antireflection films arranged on the surfaces of display screens have been widely used. As an antireflection film, for example, a multilayer film having a plurality of layers different in refractive index is known. It is known that high anti-reflection performance (low reflectance in a wide frequency band) can be obtained by using such multilayer films. The antireflection performance of an antireflection film is generally evaluated by light reflectance (luminous reflectance) Y (%), and the lower the light reflectance, the better the antireflection performance. However, there is a problem that the reflective hue tends to be colored when the light reflectance is lowered. [0003] prior art literature [0004] patent doc...

Claims

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Application Information

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IPC IPC(8): G02B1/115G09F9/00
CPCG02B1/115G09F9/00G02B1/11
Inventor 高见佳史横井辽太郎梨木智刚
Owner NITTO DENKO CORP
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