TWI742936B - Anti-glare light-shielding plate - Google Patents

Abstract

The present invention relates to an anti-glare light-shielding plate, including a light-shielding body and a flat antireflection film. The light-shielding body is made of metal and includes a first surface and a second surface. The light-shielding body further includes an inner ring surface and an edge surface both of which are connected between the first and second surfaces. The first surface has a contour with a rough surface formed by chemical etching. The flat antireflection film is formed on the first surface by plasma sputtering and includes a titanium antireflection film and a silicon dioxide antireflection film. The titanium antireflection film and silicon dioxide antireflection film both have high density and hardness, and therefore, not only reduce the reflectivity of the light-shielding body, but also improves the scratch resistance ability, antireflection ability, hardness, and stain resistance ability of the light-shielding body.

Description

Anti-glare shading sheet

The present invention relates to the technical field of optical lenses, in particular to an anti-glare shading sheet.

In recent years, smart electronic products such as mobile phones and tablet computers have flooded the lives of modern people, and imaging devices mounted on electronic products have also flourished. With the development of technology, users have higher and higher requirements for the quality of portable electronic devices.

The mainstream of the optical shading sheet material market is to use PET and PI sheets. The main advantage is that it is easy to form. After the surface is treated with a carbon layer, the reflectivity is lower than that of the original material. The disadvantage is that the cross-section reflection is high after punching, and the glare is obvious. The temperature resistance is poor, and it is easy to be deformed after the ring test. When used in smart electronic products, it cannot support the long-term use of imaging equipment (such as cameras) and different temperature conditions. However, hard and high-strength materials, such as metal materials, have the problem of high reflection. In use, it is easy to cause high reflectivity and cause stray light in the real shot of the lens, which affects the imaging effect.

The purpose of the present invention is to provide an anti-glare shading sheet, which can increase the hardness and reduce the reflectivity, so that it can meet the use requirements of various cameras.

θ

80°；該消光抗反射膜層連接於該第一表面，該消光抗反射膜層透過等離子濺射形成於該第一表面，該消光抗反射膜層包括有依次交替濺射的一鈦抗反射膜層和一二氧化矽抗反射膜層。 The present invention provides an anti-glare light-shielding sheet, which includes: a light-shielding body and a matting anti-reflection film layer. The shading system is made of metal. The shading body includes a first surface and a second surface, and an inner ring surface and an edge surface connected between the first surface and the second surface. The first surface A contour and a roughened contour surface are formed by chemical etching. The inner ring surface adopts a circular arc angle structure, and the included angle θ between the tangent line at any position of the inner ring surface and the optical axis of the light-shielding body satisfies 10°

θ

80°; The matting anti-reflection film layer is connected to the first surface, the matting anti-reflection film layer is formed on the first surface through plasma sputtering, and the matting anti-reflection film layer includes a titanium anti-reflection layer that is alternately sputtered in sequence Film layer and a silicon dioxide anti-reflective film layer.

Furthermore, the shading system is made of stainless steel.

Further, the edge surface is square or round.

Further, when the edge surface is round, the inner diameter of the shading body is between 0.3 and 50 mm, and the outer diameter of the shading body is between 1 and 60 mm.

Furthermore, the thickness of the shading body is between 0.01 and 0.1 mm.

Further, the matting anti-reflective film layer includes three titanium anti-reflective film layers and three silicon dioxide anti-reflective film layers. The silicon anti-reflection film layers are arranged staggered, the thickness of the titanium anti-reflection film is between 10 and 350 nm, and the thickness of the silicon dioxide anti-reflection film is between 10 and 350 nm.

Further, the thickness of the titanium anti-reflection film is 150 nm, 55.01 nm and 25.36 nm, and the thickness of the silicon dioxide anti-reflection film is 130.73 nm, 67.23 nm and 96.33 nm, respectively.

Further, the thickness of the titanium anti-reflection film is 150 nm, 57.01 nm and 23.36 nm, and the thickness of the silicon dioxide anti-reflection film is 122.73 nm, 65.23 nm and 86.33 nm, respectively.

According to the above technical features, the following effects can be achieved:

1. In the present invention, after the first surface is formed by chemical etching and surface treatment, a matting and anti-reflection film layer is formed on the surface by plasma sputtering coating, and the matting and anti-reflection film layer includes alternate The sputtered titanium anti-reflective film and silicon dioxide anti-reflective film have good density and hardness, which reduces the reflectivity of the shading body after coating and enhances the scratch resistance, especially to reduce the cross-sectional reflectivity , The overall performance of anti-reflection, hardness, anti-pollution, etc. has been improved, and it can be directly assembled in various cameras, and the reflectivity is greatly reduced during use to avoid affecting the imaging effect.

1: Shading body

11: The first surface

12: second surface

13: inner ring surface

131: Tangent

14: Edge surface

15: Optical axis

2: Matte anti-reflective coating

21: Titanium anti-reflective coating

22: Silicon dioxide anti-reflective coating

D1: inner diameter

D2: Outer diameter

H: thickness

θ: included angle

[The first figure] is a schematic diagram of the structure of the anti-glare shading sheet of the present invention.

[The second figure] is a schematic diagram of the disassembled state of the anti-glare shading sheet of the present invention.

[Third Figure] is a graph showing the reflectance spectrum of the first surface of the light-shielding body of the present invention.

[Fourth figure] is a graph of the transmittance spectrum of the first surface of the light-shielding body of the present invention.

Based on the above technical features, the main effects of the anti-glare shading sheet of the present invention will be clearly presented in the following embodiments.

Please refer to the first and second figures, an anti-glare light-shielding sheet includes: a light-shielding body 1 and a matte anti-reflection film 2. The shading body 1 is made of metal. The shading body 1 includes a first surface 11 and a second surface 12 parallel to each other, and an inner ring connected between the first surface 11 and the second surface 12 A surface 13 and an edge surface 14, the first surface 11 is chemically etched to form a contour and a roughened contour surface. The matting anti-reflection film layer 2 matches the shape of the first surface 11, and is formed on the first surface 11 by plasma sputtering coating. The matting anti-reflection film layer 2 includes titanium anti-reflection film layers 21 alternately sputtered in sequence. And the silicon dioxide anti-reflective film layer 22.

The light-shielding body 1 is made of stainless steel, so that the present invention has a long service life.

The inner ring surface 13 is a circular arc angle structure formed by chemical etching. A tangent line 131 at any position of the inner ring surface 13 and an optical axis 15 of the light-shielding body 1 have an included angle θ, and the included angle θ is greater than or equal to 10 degrees, and Less than or equal to 80 degrees, effectively reduce the reflection area of the inner ring surface 13, and within this range, the larger the angle θ, the smaller the reflection area, and the better the effect of eliminating glare; the inner ring surface 13 adopts a circular arc structure, and finally The reflected light source is focused to point source reflection, which has a better reflection effect.

The edge surface 14 is square or round to adapt to different installation requirements of the light-shielding sheet. When the edge surface 14 is circular, the shading body 1 has an inner diameter D1 and an outer diameter D2, the inner diameter D1 of the shading body 1 is between 0.3 and 50 mm, and the outer diameter D2 of the shading body 1 Between 1 and 60 mm.

The light-shielding body 1 has a thickness H, and the thickness H is between 0.01 and 0.1 mm.

從內往外三層該鈦抗反射膜層21的厚度分別為150奈米、55.01奈米和25.36奈米，三層該二氧化矽抗反射膜層22的厚度分別為130.73奈米、67.23奈米和96.33奈米；

從內往外三層該鈦抗反射膜層21的厚度分別為150奈米、57.01奈米和23.36奈米，三層該二氧化矽抗反射膜層22的厚度分別為122.73奈米、65.23奈米和86.33奈米。不同厚度的膜層疊加後可以降低該遮光本體1表面的反射率，減少光線反射。 The titanium anti-reflection film layer 21 and the silicon dioxide anti-reflection film layer 22 are both provided with three layers, and the closest to the first surface 11 is the titanium anti-reflection film layer 21, and the thickness of each layer of the titanium anti-reflection film layer 21 It is between 10 and 350 nanometers, and the thickness of each layer of silicon dioxide anti-reflective film 22 is between 10 and 350 nanometers. In this embodiment, two implementations of the matting anti-reflection film layer 2 are given (the side close to the light-shielding body 1 is the inside, and the side far away from the light-shielding body 1 is the outside):

The thickness of the three layers of the anti-reflection film 21 of titanium from the inside to the outside are 150 nm, 55.01 nm and 25.36 nm, and the thickness of the three layers of the anti-reflection film 22 of silicon dioxide are 130.73 nm and 67.23 nm, respectively And 96.33 nanometers;

The thickness of the three layers of the anti-reflection film 21 of titanium from the inside to the outside are 150 nm, 57.01 nm and 23.36 nm, and the thickness of the three layers of the anti-reflection film 22 of silicon dioxide are 122.73 nm and 65.23 nm, respectively And 86.33 nanometers. The superposition of films with different thicknesses can reduce the reflectivity of the surface of the light-shielding body 1 and reduce light reflection.

Please refer to the third and fourth figures, the working principle of the present invention is:

The reflectivity of the first surface 11 under light of wavelengths of 400 to 700 microns is less than 0.1%, showing black; the reflectivity of the outer surface of the matting anti-reflection film layer 2 under light of wavelengths of 400 to 700 microns is less than 0.1%, showing black.

The matting anti-reflective film layer 2 is formed by plasma sputtering coating in a high vacuum environment, and is _{alternately formed from titanium (Ti) and silicon dioxide (SiO 2)} . Because titanium (Ti) and silicon dioxide (SiO 2) are used The film formed by plasma sputtering coating has better density and hardness, so that the scratch resistance of the coated shading sheet is enhanced, and the reflectivity is reduced; because plasma sputtering coating is deposited in a molecular manner, the thickness of the coating is Thinner (the total thickness is less than 1 micron), so it will not damage the surface accuracy of the parts; and the anti-reflective, hardness, anti-pollution and other comprehensive properties of the light-shielding sheet after the coating is improved, and it is used during use The vacuum suction pen only needs to place the shading sheet between the lenses, and it can be directly assembled in various cameras, such as mobile phone cameras, computer cameras, and car cameras. Through the optimized combination of the thickness of each layer, the film structure has a strong surface hardness, and at the same time has a good anti-reflection effect, and the average reflectivity in the effective spectral region is less than 0.1%.

For comparison, when the light-shielding sheet is the existing uncoated optical SUS stainless steel, the average reflectance in the effective spectral region is about 25% to 35%. It can be seen that the reflectivity of the metal light-shielding sheet after coating is greatly reduced (< 0.1%).

Through the above solution, the first surface 11 of the present invention is formed by chemical etching and surface treatment, and the matting and anti-reflective film layer 2 is formed on the surface by plasma sputtering coating, and the matting and anti-reflective film layer 2 includes alternately The sputtered titanium anti-reflective film layer 21 and the silicon dioxide anti-reflective film layer 22 both have better density and hardness, which reduces the reflectivity of the light-shielding body 1 after coating and enhances scratch resistance, especially Can reduce the cross-sectional reflectivity, the overall anti-reflection, hardness, anti-pollution and other comprehensive The performance can be improved, and it can be directly assembled in various cameras, and the reflectivity is greatly reduced in use to avoid affecting the imaging effect.

Based on the description of the above embodiments, when one can fully understand the operation and use of the present invention and the effects of the present invention, but the above embodiments are only the preferred embodiments of the present invention, and the implementation of the present invention cannot be limited by this. The scope, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the description of the invention, are all within the scope of the present invention.

1: Shading body

11: The first surface

12: second surface

13: inner ring surface

14: Edge surface

2: Matte anti-reflective coating

21: Titanium anti-reflective coating

22: Silicon dioxide anti-reflective coating

Claims (8)

An anti-glare shading sheet, comprising: a shading body made of metal material, the shading body comprising a first surface and a second surface, and an inner ring surface connected between the first surface and the second surface And an edge surface, the first surface is chemically etched to form a contour and a roughened contour surface, the inner ring surface adopts a circular arc structure, and the angle between the tangent at any position of the inner ring surface and the optical axis of the shading body θ satisfies 10°

θ

80°; a matting anti-reflection film layer, connected to the first surface, the matting anti-reflection film layer is formed on the first surface through plasma sputtering, the matting anti-reflection film layer includes a titanium anti-reflection sputtering alternately in sequence Reflective film layer and a silicon dioxide anti-reflective film layer. The anti-glare shading sheet according to claim 1, wherein the shading system is made of stainless steel. The anti-glare shading sheet according to claim 1, wherein the edge surface is square or round. According to the anti-glare shading sheet of claim 3, further, when the edge surface is round, the inner diameter of the shading body is between 0.3 and 50 mm, and the outer diameter of the shading body is between 1 and 60 mm. Between centimetres. The anti-glare shading sheet according to claim 1, wherein the thickness of the shading body is between 0.01 and 0.1 mm. The anti-glare shading sheet according to claim 1, further, the matting anti-reflection film layer includes three titanium anti-reflection film layers and three silicon dioxide anti-reflection film layers, and the matting anti-reflection film layer is arranged in a manner The titanium anti-reflective film layers and the silicon dioxide anti-reflective film layers are arranged in a staggered arrangement, the thickness of the titanium anti-reflective film is between 10 and 350 nm, and the thickness of the silicon dioxide anti-reflection film is between 10 and Between 350nm. The anti-glare light-shielding sheet according to claim 6, wherein the thickness of the titanium anti-reflection film is 150 nm, 55.01 nm and 25.36 nm, and the thickness of the silicon dioxide anti-reflection film is 130.73 nm, respectively Meters, 67.23 nanometers and 96.33 nanometers. The anti-glare shading sheet according to claim 6, wherein the thickness of the titanium anti-reflection film is 150 nm, 57.01 nm and 23.36 nm, and the thickness of the silicon dioxide anti-reflection film is 122.73 nm, respectively Meters, 65.23 nanometers and 86.33 nanometers.

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