CN112230311A - Anti-dazzle light-shading sheet - Google Patents

Abstract

The invention discloses an anti-dazzle shading sheet, which comprises a shading body made of a metal material and an extinction anti-reflection film layer; the shading body comprises a first surface, a second surface, an inner ring surface and an edge surface, wherein the first surface and the second surface are parallel, the inner ring surface and the edge surface are connected between the first surface and the second surface, and the first surface forms a contour profile and a roughened contour surface through chemical etching; the extinction antireflection film layer is matched with the first surface in shape, is formed on the first surface through plasma sputtering coating, and comprises a Ti antireflection film layer and a silicon dioxide antireflection film layer which are sequentially and alternately sputtered. According to the invention, after the first surface is subjected to chemical etching forming and surface treatment, the surface of the first surface is subjected to plasma sputtering coating to form the extinction antireflection film layer, the extinction antireflection film layer comprises the Ti antireflection film layer and the silicon dioxide antireflection film layer which are sequentially and alternately sputtered, and the Ti antireflection film layer and the silicon dioxide antireflection film layer have better density and hardness, so that the reflectivity of the coated shading body is reduced, the scratch resistance is enhanced, and the overall antireflection, hardening and antifouling properties are improved.

Description

Anti-dazzle light-shading sheet

Technical Field

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

Background

In recent years, smart electronic products such as mobile phones and tablet computers have been filled in the lives of modern people, and video devices mounted on the electronic products have been developed. With the development of technology, users have higher and higher requirements for the quality of portable electronic devices.

The optical shading sheet material is mainly made of PET and PI sheets in the current market, has the main advantages of easy forming, lower reflectivity compared with the original material after the surface is treated by a carbon layer, and has the defects of high section reflection after punching, obvious glare phenomenon and poor temperature resistance, is easy to deform after environmental measurement, and can not support the use requirements of image equipment (such as a camera) for a long time and under different temperature conditions when being applied to intelligent electronic products. The hard and high-strength material, such as metal material, has the problem of high reflection, and the high reflectivity is easily caused in use, so that the parasitic light is generated in the real shooting of the lens, and the imaging effect is influenced.

Disclosure of Invention

The invention aims to provide an anti-dazzle shade which can increase the hardness and reduce the reflectivity so as to meet the use requirements of various cameras.

In order to achieve the above purpose, the solution of the invention is:

an anti-dazzle shading sheet comprises a shading body made of a metal material and an extinction anti-reflection film layer; the shading body comprises a first surface, a second surface, an inner ring surface and an edge surface, wherein the first surface and the second surface are parallel, the inner ring surface and the edge surface are connected between the first surface and the second surface, and the first surface forms a contour and a roughened contour surface through chemical etching; the extinction antireflection film layer is matched with the first surface in shape, is formed on the first surface through plasma sputtering coating, and comprises a Ti antireflection film layer and a silicon dioxide antireflection film layer which are sequentially and alternately sputtered.

The shading body is made of stainless steel.

The inner ring surface is an arc angle structure formed by chemical etching, and included angles theta between the tangent line of any position of the inner ring surface and the optical axis of the shading body are respectively between 10 degrees and 80 degrees.

The edge surface is square or circular.

When the edge surface is circular, the inner diameter of the shading body ranges from 0.3 mm to 50mm, and the outer diameter ranges from 1mm to 60 mm.

The thickness range of the shading body is 0.01-0.1 mm.

Ti antireflection coating and silicon dioxide antireflection coating all are provided with the three-layer, and are closest to the first surface be Ti antireflection coating, every layer the thickness of Ti antireflection coating is 10~350nm, every layer the thickness of silicon dioxide antireflection coating is 10~350 nm.

The thicknesses of the Ti antireflection film layer are 150nm, 55.01nm and 25.36nm respectively, and the thicknesses of the silicon dioxide antireflection film layer are 130.73nm, 67.23nm and 96.33nm respectively.

The thicknesses of the Ti antireflection film layer are 150nm, 57.01nm and 23.36nm respectively, and the thicknesses of the silicon dioxide antireflection film layer are 122.73nm, 65.23nm and 86.33nm respectively.

After the technical scheme is adopted, the first surface is subjected to chemical etching forming and surface treatment, the extinction antireflection film layer is formed on the surface of the first surface through plasma sputtering coating, and comprises the Ti antireflection film layer and the silicon dioxide antireflection film layer which are sequentially and alternately sputtered, the density and the hardness of the extinction antireflection film layer are good, so that the reflectivity of the coated shading body is reduced, the scratch resistance is enhanced, particularly the section reflectivity can be reduced, the overall comprehensive performances of reflection reduction, hardening, antifouling and the like are improved, the shading body can be directly assembled in various cameras, the reflectivity is greatly reduced in use, and the imaging effect is prevented from being influenced.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an exploded view of an embodiment of the present invention;

FIG. 3 is a graph of a reflectance spectrum of a first surface of a light-shielding body according to an embodiment of the present invention (the ordinate represents reflectance, and the abscissa represents wavelength);

FIG. 4 is a graph of transmittance spectra (reflectance on the ordinate and wavelength on the abscissa) for an embodiment of the invention;

the reference numbers illustrate: a light-shielding body 1; a first surface 11; a second surface 12; an inner annular surface 13; an edge surface 14; an extinction antireflection film layer 2; a Ti antireflection film layer 21; a silicon dioxide anti-reflective film layer 22.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The invention relates to an anti-dazzle shading sheet which comprises a shading body 1 made of a metal material and an extinction antireflection film layer 2.

The light shielding body 1 comprises a first surface 11 and a second surface 12 which are parallel, an inner ring surface 13 and an edge surface 14 which are connected between the first surface 11 and the second surface 12, wherein the first surface 11 forms a contour and a roughened contour surface through chemical etching;

the extinction antireflection film layer 2 is matched with the first surface 11 in shape, is formed on the first surface 11 through plasma sputtering coating, and comprises a Ti antireflection film layer 21 and a silicon dioxide antireflection film layer 22 which are alternately sputtered in sequence.

Referring to fig. 1 and 2, a specific embodiment of the present invention is shown.

The shading body 1 is made of stainless steel, so that the shading device has longer service life.

The inner ring surface 13 is an arc-angle structure formed by chemical etching, the included angle theta between the tangent line at any position of the inner ring surface 13 and the optical axis of the shading body 1 is more than or equal to 10 degrees and less than or equal to 80 degrees, the reflection area of the inner ring surface 13 is effectively reduced, and the larger the angle theta is, the smaller the reflection area is, and the better the glare eliminating effect is; the inner ring surface 13 adopts an arc angle structure, and finally, a reflecting light source is focused into point source reflection, so that a better reflecting effect is achieved.

The edge surface 14 is square or circular to accommodate different shade installation requirements. When the edge surface 14 is circular, the inner diameter D1 of the light shielding body 1 ranges from 0.3 mm to 50mm, and the outer diameter D2 ranges from 1mm to 60 mm.

The thickness H of the shading body 1 ranges from 0.01 mm to 0.1 mm.

The Ti antireflection film layer 21 and the silicon dioxide antireflection film layer 22 are provided with three layers, the Ti antireflection film layer 21 is closest to the first surface 11, the thickness of each Ti antireflection film layer 21 is 10-350 nm, and the thickness of each silicon dioxide antireflection film layer 22 is 10-350 nm. Two embodiments of the extinction antireflection film layer 2 are given in this example (the side close to the light shielding body 1 is the inside, and the side far from the light shielding body 1 is the outside): the thicknesses of the three Ti antireflection film layers 21 from inside to outside are respectively 150nm, 55.01nm and 25.36nm, and the thicknesses of the three silicon dioxide antireflection film layers 22 are respectively 130.73nm, 67.23nm and 96.33 nm; ② the thicknesses of the three Ti antireflection film layers 21 from the inside to the outside are respectively 150nm, 57.01nm and 23.36nm, and the thicknesses of the three silicon dioxide antireflection film layers 22 are respectively 122.73nm, 65.23nm and 86.33 nm. The reflectivity of the surface of the shading body 1 can be reduced after the films with different thicknesses are superposed, and the light reflection is reduced.

Referring to fig. 3 and 4, the working principle of the present invention is:

the reflectivity of the first surface 11 under the wavelength light of 400-700 nm is less than 0.1%, and the first surface is black; the reflectivity of the outer surface of the extinction antireflection film layer 2 under the wavelength light of 400-700 nm is less than 0.1%, and the outer surface is black.

The extinction antireflection film layer 2 is formed by plasma sputtering coating in a high vacuum environment and is composed of Ti and SiO₂Are alternately generated due to Ti and SiO₂The film layer formed by adopting the 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; the plasma sputtering coating is characterized in that the material is deposited in a molecular mode, and the coating thickness is thin (the total thickness is less than 1 mu m), so that the surface shape precision of the part cannot be damaged; and the comprehensive properties of antireflection, hardening, antifouling and the like of the coated shading sheet are improved, and when the shading sheet is used, the shading sheet is placed between lenses by using a vacuum suction pen, and can be directly assembled in various cameras, such as mobile phone cameras, computer cameras, vehicle-mounted cameras and the like. Through the optimized combination of the thicknesses of all layers, the film layer structure has strong surface hardness and good antireflection effect, and the average reflectivity in an effective spectrum region is lower than 0.1 percent.

In contrast, when the light-shielding sheet is an existing uncoated optical SUS stainless steel, the average reflectance in the effective spectral region is about 25% to 35%, and thus it can be seen that the reflectance of the coated metal light-shielding sheet is greatly reduced (< 0.1%).

According to the scheme, after the first surface 11 is formed through chemical etching and surface treatment, the extinction antireflection film layer 2 is formed on the surface through plasma sputtering coating, the extinction antireflection film layer 2 comprises the Ti antireflection film layer 21 and the silicon dioxide antireflection film layer 22 which are sequentially and alternately sputtered, and the Ti antireflection film layer 21 and the silicon dioxide antireflection film layer 22 have good density and hardness, so that the reflectivity of the coated shading body 1 is reduced, the scratch resistance is enhanced, the section reflectivity can be particularly reduced, the overall comprehensive performances of reflection reduction, hardening, antifouling and the like are improved, the shading body can be directly assembled in various cameras, the reflectivity is greatly reduced in use, and the imaging effect is prevented from being influenced.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims (9)

1. An anti-glare light-shielding sheet, characterized in that: the light-shading anti-reflection film comprises a light-shading body made of a metal material and an extinction anti-reflection film layer;

the shading body comprises a first surface, a second surface, an inner ring surface and an edge surface, wherein the first surface and the second surface are parallel, the inner ring surface and the edge surface are connected between the first surface and the second surface, and the first surface forms a contour and a roughened contour surface through chemical etching;

the extinction antireflection film layer is matched with the first surface in shape, is formed on the first surface through plasma sputtering coating, and comprises a Ti antireflection film layer and a silicon dioxide antireflection film layer which are sequentially and alternately sputtered.

2. The anti-glare shade of claim 1, wherein:

the shading body is made of stainless steel.

3. The antiglare shade of claim 2, wherein:

the inner ring surface is an arc angle structure formed by chemical etching, and included angles theta between the tangent line of any position of the inner ring surface and the optical axis of the shading body are respectively between 10 degrees and 80 degrees.

4. The anti-glare shade of claim 1, wherein:

the edge surface is square or circular.

5. The anti-glare shade of claim 4, wherein:

when the edge surface is circular, the inner diameter of the shading body ranges from 0.3 mm to 50mm, and the outer diameter ranges from 1mm to 60 mm.

6. The anti-glare shade of claim 1, wherein:

the thickness range of the shading body is 0.01-0.1 mm.

7. The anti-glare shade of claim 1, wherein:

ti antireflection coating and silicon dioxide antireflection coating all are provided with the three-layer, and are closest to the first surface be Ti antireflection coating, every layer the thickness of Ti antireflection coating is 10~350nm, every layer the thickness of silicon dioxide antireflection coating is 10~350 nm.

8. The antiglare shade of claim 7, wherein:

the thicknesses of the Ti antireflection film layer are 150nm, 55.01nm and 25.36nm respectively, and the thicknesses of the silicon dioxide antireflection film layer are 130.73nm, 67.23nm and 96.33nm respectively.

9. The antiglare shade of claim 7, wherein:

the thicknesses of the Ti antireflection film layer are 150nm, 57.01nm and 23.36nm respectively, and the thicknesses of the silicon dioxide antireflection film layer are 122.73nm, 65.23nm and 86.33nm respectively.

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