CN110187425B - Material with blue light prevention function and protective film using material - Google Patents

Abstract

The invention discloses a material with a blue light prevention function and a protective film using the material. The material with blue light preventing function comprises a high refractive index material and a low refractive index material, wherein the high refractive index material comprises Cr ₂ O ₃ The low refractive index material comprises SiO ₂ ，MgF ₂ ，HfO ₂ ，TmF ₃ ，TiN，ThF ₄ ，TbF ₃ ，Y ₂ O ₃ ，TaN，SmF ₃ ，ScF ₃ ，PrF ₃ ，NdF ₃ ，Na ₃ AlF ₆ ，MgO，LaF ₃ ，LuF ₃ ，Al ₂ O ₃ ,Y ₂ O ₃ ，BaF ₂ ，CaF ₂ ，LiF，HoF ₃ ，HfF ₄ ，GeO ₂ ，YF ₃ ，YbF ₃ ，CeF ₃ ，GdF ₃ ，A ₂ O，Gd ₂ O ₃ ，EuF ₃ ，Bi ₂ O ₃ ，AlON,ATO，NdF ₃ ，WO ₃ Or at least one of the mixtures thereof. It has the following advantages: the material of the technical scheme reduces harmful blue light under the condition of not damaging color balance, ensures the transmittance of beneficial blue light and residual visible light wave bands, and reduces the residual reflection of the whole visible light wave band.

Description

Material with anti-blue light function and protective film using the material

technical field

The invention relates to an optical material, in particular to a material with anti-blue light function and a protective film using the material.

Background technique

Blue light is an important part of natural light. Blue light hazard refers to the retinal damage caused by the photochemical reaction caused by radiation light with a wavelength between 400 and 500nm. With the awakening of consumers' awareness of "blue light protection", blue light protection has attracted the attention of consumers. Display screens or lighting systems currently on the market are often implemented with white light LEDs, and the most commonly used method is to use gallium nitride to emit blue light and add YAG phosphors. The radiation spectrum intensity of blue LEDs is mainly concentrated in the range of 400-500mm, especially in the low-energy blue light band with strong radiation intensity. Because the shorter the wavelength, the stronger the energy, so the energy of short-wavelength blue light is much stronger than that of green, yellow, and red light, so its damage to human eyes is also much greater. According to relevant research, exposure to blue light with a wavelength of about 425nm will accelerate the photooxidation reaction, triggering the photooxidation mechanism of the retina of the fundus. This process leads to damage to mitochondrial DNA in retinal pigment epithelial cells, which is the pathogenesis of retinal macular degeneration (AMD) and blue light is also the regulator of the body's biological clock. There is clear evidence that blue light is an important factor that stimulates the brain to release melatonin, and melatonin is an important indicator of the body's regulation of the biological clock. Therefore, blue light (mainly in the 460nm band ) plays an indispensable role in the human body. Therefore, the anti-blue light should reduce the harmful blue light (415nm-455nm) as much as possible without destroying the color balance, and ensure the transmittance of the beneficial blue light (above 455nm) to the greatest extent.

According to the survey, it can be known that blue light blocking filters are helpful to teenagers, and can be used as a countermeasure to block the high dose of blue light emitted by LED screens and reduce the negative impact of modern lighting on nighttime physiological systems. Therefore, it is necessary to do certain protection work for this type of equipment to reduce the harm of blue light to the human body.

In the prevention and control of blue light, there are mainly two technical routes at home and abroad. One is the use of coloring methods, by adding black essence, yellow essence, azo permanent yellow dyes, and azo permanent orange dyes to the anti-blue light film layer. Absorbents such as dyes can filter most of the high-energy short-wave blue light. However, this method has strong absorption for the 400nm to 500nm band or even the whole band. The anti-blue light protective film manufactured by this method will affect the color sensitivity of the wearer, cause color deviation, and have low applicability. At the same time, long-term use will cause Changes in vision chromatic aberration cause other visual disturbances; in the patent document with publication number CN104476874B, it is stated that an anti-blue light protective film is prepared by coloring. It can be seen that the dosage of the absorbent added by this method is not easy to control, and is also unfavorable for batch production.

Another most common anti-blue light product on the market adopts the reflective technical route, that is, adopts optical coating method, realizes short-wave high reflection through the principle of inter-film interference, and prepares products with high reflectivity in the blue light band 415nm-455nm and high transmittance in 470nm-760nm. High-efficiency multi-layer dielectric film to achieve. In this way, the function of partially blocking blue light with a wavelength of 400nm-480nm is realized. The reflectivity of blue light with the highest radiation wavelength of 400nm-450nm reaches 50%, and the reflectivity of wavelength 460nm-480nm reaches about 40%. For this method of blocking blue light through reflection, although the transmittance of the blue light band of the display screen can be blocked, the influence of external ambient light is ignored. The most common external ambient light is sunlight. Since the coating layer has a structure with high reflection in the blue light band, it strongly reflects the blue light component in the ambient light. More importantly, the excessively bright blue-violet light reflection on the outer surface will also cause uncomfortable secondary blue light damage such as glare to the surrounding people. In the patent document whose publication number is CN205374778U, a method for preparing an anti-blue light coating by reflection is described. It can be seen that the anti-blue light film prepared by this method is seriously unfeasible due to the serious problem of reflection glare.

It can be seen that the above two methods of reflection and absorption have advantages and disadvantages, and are not optimal.

Contents of the invention

The invention provides a material with anti-blue light function and a protective film using the material, which overcomes the shortcomings of the method with anti-blue light function in the background technology.

One of the adopted technical schemes that the present invention solves its technical problem is:

The material with anti-blue light function includes high refractive index material and low refractive index material. The high refractive index material contains Cr ₂ O ₃ , and the low refractive index material contains SiO ₂ , MgF ₂ , HfO ₂ , TmF ₃ , TiN, ThF ₄ , TbF ₃ , Y ₂ O ₃ , TaN, SmF ₃ , ScF ₃ , PrF ₃ , NdF ₃ , Na ₃ AlF ₆ , MgO, LaF ₃ , LuF ₃ , Al ₂ O ₃ , Y ₂ O ₃ , BaF ₂ , CaF ₂ , LiF, HoF ₃ , HfF ₄ , GeO ₂ , YF ₃ , YbF ₃ , CeF ₃ , GdF ₃ , A ₂ O, Gd ₂ O ₃ , EuF ₃ , Bi ₂ O ₃ , AlON, ATO, NdF ₃ , at least one of WO ₃ .

In one embodiment: the high refractive index material is Cr ₂ O ₃ .

In one embodiment: the low refractive index material includes SiO ₂ .

In one embodiment: the high-refractive index material is set as a high-refractive-index film layer, the low-refractive-index material is set as a low-refractive-index film layer, and the high-refractive-index film layer and the low-refractive-index film layer are laminated.

In one embodiment: multi-layer high refractive index film layers and multi-layer low refractive index film layers are set, and multi-layer high refractive index film layers and multi-layer low refractive index film layers are alternately laminated.

In one embodiment: the refractive index of the high refractive index material is 2.0-2.8, and the refractive index of the low refractive index material is 1.3-1.7.

Two of the adopted technical scheme that the present invention solves its technical problem is:

The material with anti-blue light function includes high refractive index material and low refractive index material, the refractive index of the high refractive index material is 2.0-2.8, and the refractive index of the low refractive index material is 1.3-1.7.

In one embodiment: the high-refractive-index material is set as a high-refractive-index film layer, and the low-refractive-index material is set as a low-refractive-index film layer.

The third technical solution adopted by the present invention to solve its technical problems is:

The material with anti-blue light function includes a high-refractive-index material and a low-refractive-index material, the high-refractive-index material is set as a high-refractive-index film layer, the low-refractive-index material is set as a low-refractive-index film layer, and the high-refractive-index film Layer and low-refractive-index film layer are combined to prevent UV light completely; in single-sided barrier:

In the 380nm-450nm band, Rave<1.5%, Tave<75%, rejection rate>25%;

In the 450nm-500nm band, Rave<0.6%, Tave<86%, rejection rate>14%;

In the 500nm-780nm band, Rave<1.2%, Tave>92%, and rejection rate<8%.

Four of the technical solutions adopted by the present invention to solve its technical problems are:

The material with anti-blue light function includes a high-refractive-index material and a low-refractive-index material, the high-refractive-index material is set as a high-refractive-index film layer, the low-refractive-index material is set as a low-refractive-index film layer, and the high-refractive-index film Layer and low-refractive-index film layer are combined to prevent UV light completely; in single-sided barrier:

In the 380nm-450nm band, Rave<2%, Tave<85%, rejection rate>15%;

In the 450nm-500nm band, Rave<1%, Tave<91%, rejection rate>9%;

In the 500nm-780nm band, Rave<2%, Tave>94%, and rejection rate<6%.

The fifth technical solution adopted by the present invention to solve its technical problems is:

The protective film using the above-mentioned material with anti-blue light function includes a substrate, and the substrate is provided with a high-refractive-index film layer made of a high-refractive-index material and a low-refractive-index film layer made of a low-refractive-index material. The high-refractive-index film layer and the low-refractive-index film layer are laminated.

In one embodiment: the substrate is selected from polyethylene terephthalate, polycarbonate, cellulose triacetate, polymethyl methacrylate, polycarbonate/polymethyl methacrylate composite material, polyamide At least one of imine, polypropylene, polyvinyl chloride, polyvinyl butyral, ethylene vinyl acetate copolymer or polyurethane elastomer, polytetrafluoroethylene, fluoroethyl propylene, and polyvinyl difluoride.

In one embodiment: if _two layers of low-refractive-index material MgF are plated on the outermost layer, then the medium-refractive-index material and the high-refractive-index material participate in the film system design.

In one embodiment: the front and back of the substrate are provided with the above-mentioned high refractive index film layer and low refractive index film layer.

Compared with the background technology, this technical solution has the following advantages:

The material of this technical solution reduces harmful blue light (415nm-455nm) without destroying the color balance, and ensures the transmittance of beneficial blue light (above 455nm) and the remaining visible light band, while reducing the remaining reflection of the entire visible light band, In order to achieve good blue light blocking rate, low residual reflectance (no glare), high light transmittance (visible light band), no color difference and comfort, it can effectively relieve visual fatigue, protect the retina, and improve visual clarity and authenticity . Using the basic theory of broadband AR film system design, combined with the extinction coefficient of materials, and using the unique absorption properties of Cr ₂ O ₃ materials, broadband AR film stacks with different blue light blocking capabilities are designed.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1-1 is the structural design drawing of embodiment one;

Fig. 1-2 is the wavelength-transmittance curve of embodiment one anti-blue light protective film;

Fig. 1-3 is the wavelength-reflectivity curve of embodiment one anti-blue light protective film;

Fig. 1-4 is the wavelength-absorption rate curve of embodiment one anti-blue light protective film;

Fig. 1-5 is the transmission and residual reflection chromaticity figure of embodiment one anti-blue light protective film;

Fig. 1-6 is the optical constant curve of embodiment one _Cr2O3 film _;

Fig. 1-7 is embodiment one SiO The optical constant curve of _thin film;

Fig. 2-1 is the schematic diagram of the film layer structure of embodiment two;

Fig. 2-2 is the wavelength-reflectivity curve of embodiment two anti-blue light protective films;

Fig. 2-3 is the wavelength-absorption rate curve of embodiment two anti-blue light protective films;

Fig. 2-4 is the transmission and residual reflection chromaticity diagram of embodiment two anti-blue light protective film;

Fig. 2-5 is the optical constant curve of embodiment two _Cr2O3 film _;

2-6 are the optical constant curves of the SiO ₂ thin film of the second embodiment.

Figure 3-1 is the wavelength-transmittance curve of the three anti-blue light protective film of the embodiment;

Fig. 3-2 is the wavelength-reflectivity curve of embodiment three anti-blue light protective films;

Fig. 3-3 is the wavelength-absorption rate curve of embodiment three anti-blue light protective films;

Fig. 3-4 is the transmission and residual reflection chromaticity figure of embodiment three anti-blue light protective films;

Fig. 3-5 is the optical constant curve of embodiment three Cr ₂ O ₃ films;

Fig. 3-6 is the optical constant curve of embodiment three SiO ₂ thin films;

3-7 are the optical constant curves of the uncoated PC in Example 3.

Fig. 4-1 is the structural design drawing of embodiment four;

Fig. 4-2 is the wavelength-transmittance curve of embodiment four anti-blue light protective films;

Fig. 4-3 is the wavelength-reflectivity curve of embodiment four anti-blue light protective films;

Fig. 4-4 is the wavelength-absorption rate curve of embodiment four anti-blue light protective films;

Fig. 4-5 is the transmission and residual reflection chromaticity figure of embodiment four anti-blue light protective films;

Fig. 4-6 is _the optical constant curve of embodiment four _Cr2O3 film;

4-7 are the optical constant curves of the SiO ₂ thin film in Example 4.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

A broadband AR protective film with anti-blue light function, which includes a base 3, on which a high-refractive-index film layer made of a high-refractive-index material and a low-refractive-index film layer made of a low-refractive index material are arranged on the base 3 . Figure 1-1 is a schematic diagram of the structure of the anti-blue light film of Example 1. The film layer in the figure is only a schematic diagram of the number of layers, and does not represent the actual thickness of the film layer.

The base of embodiment 1 adopts PC lens (polycarbonate), which has the advantages of excellent impact resistance, high refractive index, light specific gravity and 100% UV protection. Of course, according to needs, the substrate can also use polyethylene terephthalate (PET), cellulose triacetate (TAC), polymethyl methacrylate (PMMA), polycarbonate/polymethyl methacrylate Composite (PC/PMMA), polyimide (PI), polypropylene (PP), polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) or polyurethane elastomer One of optical plastic substrates such as TPU, polytetrafluoroethylene (PTFE), fluoroethylene propylene (FEP), polyvinyl difluoride (PVDF), etc.

The PC lens is provided with a low refractive index material SiO ₂ layer, and the low refractive index material SiO ₂ layer is provided with a high refractive index material Cr ₂ O ₃ layer, so that the high and low refractive index material film layers are alternately arranged, and the single surface is shared. There are five floors. The anti-blue light film consists of a first low-refractive-index film layer 101, a second high-refractive-index film layer 102, a third low-refractive-index film layer 103, a fourth high-refractive index film layer 104, and The fifth low refractive index film layer 105 . The base adopts double-sided symmetrical structure. From the back of the base, the anti-blue light film consists of the first low-refractive index film layer 201, the second high-refractive-index film layer 202, the third low-refractive-index film layer 203, the fourth high-refractive index film layer 204, the For the five low-refractive index film layers 205, preferably, the corresponding film layers on the front and back have the same thickness. Certainly, the number of layers of the low-refractive index film layer and the high-refractive index film layer can be added or subtracted as required. The invention adopts a symmetrical film layer design, which greatly simplifies the difficulty of process production, and can obtain good blue light blocking effects from different sides, and solves the problems of glare and secondary damage of blue light.

The refractive index of the low refractive index material SiO ₂ layer is 1.3-1.7.

The refractive index of the high refractive index material Cr ₂ O ₃ layer is 2.0-2.8.

Wherein: the total thickness of the low-refractive index film layer is greater than the total thickness of the high-refractive index film layer, such as the total thickness of the low-refractive index film layer is 300-350nm, and the total thickness of the high-refractive index film layer is such as 10-30nm. Both the innermost film layer and the outermost film layer on one side of the substrate are low-refractive index film layers. Preferably, the thicknesses of the innermost film layer and the outermost film layer are greater than that of the respective layers between the two film layers. The thickness of the film layer, further, preferably the thickness of the innermost film layer is greater than the thickness of the outermost film layer; specific example: the first layer of low refractive index film layer 101>the fifth layer of low refractive index film layer 105>the second Three low-refractive-index film layers>fourth high-refractive-index film layer 104>second high-refractive-index film layer 102.

Among them, the low refractive index material SiO ₂ film layer and the high refractive index material Cr ₂ O ₃ film layer can be plated by electron beam evaporation + ion beam assisted deposition, and the PC substrate is best kept at a low temperature, so it can be Properly control the energy of energetic ions. For electron beam evaporation deposition, the Cr ₂ O ₃ material was directly evaporated during the experiment, and the obtained Cr ₂ O ₃ optical constants were fitted for film system design. For sputtering deposition, the metal Cr target can be directly sputtered by direct current reactive sputtering, and Cr ₂ O ₃ can be generated by reactive sputtering with oxygen, and the optical constants can be obtained by software fitting for film system design.

Please see Figure 1-2 to Figure 1-7, the effect of the broadband AR protective film with anti-blue light function described in this embodiment is as follows: the anti-blue light film can partially block the transmittance in the 380nm-480nm band and improve visible light transmittance over the entire range, and reduce residual reflections across the entire band. Full protection in the ultraviolet band; preparation of an anti-blue light film design with a single-sided barrier rate of 13% and a double-sided barrier rate of 23%. Single-sided barrier effect:

In the 380nm-450nm band, Rave<2%, Tave<85%, rejection rate>15%;

In the 450nm-500nm band, Rave<1%, Tave<91%, rejection rate>9%;

In the 500nm-780nm band, Rave<2%, Tave>94%, and rejection rate<6%.

L1-L5 in Figure 1-4 shows the wavelength-absorptivity curves of the various thin layers of the anti-blue light protective film, where L1, L3, and L5 are SiO ₂ , and it can be seen that the thin layers have lower absorptivity. L2 and L4 are Cr ₂ O ₃ , and the thin layer has a higher absorption rate due to a higher extinction coefficient, and the absorption of the short-wave is more obvious in the longer-wave band.

The invention relates to the principle of multi-beam interference, and on the basis of broadband anti-reflection film, the specified harmful blue light bands are blocked in different degrees. The rejection rate can be selected from 10% to 40%, and at the same time, through the design of the film layer, an AR film layer with low residual reflectivity in the whole band can be prepared. The material selection is carried out through the different optical constant characteristics of oxide materials and the extinction coefficient of high refractive index materials. According to the distribution law of the Lorentz oscillator model, since Cr ₂ O ₃ has a relatively steep extinction coefficient line shape and a high refractive index in the harmful blue light band, Cr ₂ O ₃ is selected as the high refractive index material, and SiO ₂ is selected as the low refractive index material. material used.

The multi-beam interference effect is used to design the broadband anti-reflection film system. The film layer arrangement is generally composed of high refractive index materials and low refractive index materials alternately (it can also be designed alternately by high refractive index materials and medium refractive index materials. In the final The outer layer is coated with low refractive index materials and consists of three types). By adjusting the thickness of the material and the number of layers of the film, the absorption of the entire anti-blue light film in the harmful wave band can be controlled to achieve the attenuation of the harmful blue light wave band (415nm-455nm), and the regulation of other wave bands to achieve the target value (double-sided in the harmful blue light wave band) The rejection rate can be 20%, 30%, 40%, etc.).

It can be seen that the broadband AR protective film with anti-blue light function of the present invention not only realizes full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects the retina, but also ensures beneficial blue light. The high transmittance improves the visual clarity and authenticity. At the same time, the design of broadband AR film system reduces the residual reflection of the whole band, and has obvious anti-glare effect.

Embodiment two

A broadband AR protective film with anti-blue light function, it differs from Embodiment 1 in that: the PC lens is provided with a low refractive index material SiO ₂ layer, and the low refractive index material SiO ₂ layer is provided with a high Refractive index material Cr ₂ O ₃ layers, such high and low refractive index material film layers are arranged alternately, a total of five layers are required on one side. From the front of the substrate, the anti-blue light film consists of a first low-refractive index film layer 101, a second high-refractive index film layer 102, a third low-refractive index film layer 103, a fourth high-refractive index film layer 104, The fifth low refractive index film layer 105 . The substrate adopts a double-sided symmetrical structure, and the anti-blue light film consists of the first low-refractive index film layer 201, the second high-refractive index film layer 202, the third low-refractive index film layer 203, and the fourth high-refractive-index film layer from the back of the substrate. The refractive index film layer 204 and the fifth low refractive index film layer 205 .

Wherein, the total thickness of the SiO ₂ film layer of the low refractive index material is, for example, 300-360 nm. The total thickness of the Cr ₂ O ₃ film layer of the high refractive index material is, for example, 35-55 nm.

Among them, the low-refractive index material SiO ₂ film layer and the high-refractive index material Cr ₂ O ₃ film layer can be plated by electron beam evaporation. The Cr ₂ O ₃ material was directly evaporated during the experiment, and the obtained Cr ₂ O 3 ₃ optical constants for film system design.

Please see Figure 2-1 to Figure 2-6. The effect of the broadband AR protective film with anti-blue light function described in this example is as follows: full protection in the ultraviolet band; the single-sided barrier rate is 18%, and the double-sided barrier rate is 18%. Designed for 31% anti-blue light film system. Single-sided barrier effect:

In the 380nm-450nm band, Rave<1.5%, Tave<75%, rejection rate>25%;

In the 450nm-500nm band, Rave<0.6%, Tave<86%, rejection rate>14%;

In the 500nm-780nm band, Rave<1.2%, Tave>92%, and rejection rate<8%.

L1-L5 in Figure 2-3 shows the wavelength-absorptivity curves of the various thin layers of the anti-blue light protective film, where L1, L3, and L5 are SiO ₂ , and it can be seen that the thin layers have lower absorptivity. L2 and L4 are Cr ₂ O ₃ , and the thin layer has a higher absorption rate due to a higher extinction coefficient, and the absorption of the short-wave is more obvious in the longer-wave band.

It can be seen that the broadband AR protective film with anti-blue light function of the present invention not only realizes full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects the retina, but also ensures beneficial blue light. The high transmittance improves the visual clarity and authenticity. At the same time, the design of broadband AR film system reduces the residual reflection of the whole band, and has obvious anti-glare effect.

Embodiment three

A broadband AR protective film with anti-blue light function, it differs from Embodiment 1 in that: the PC lens is provided with a low refractive index material SiO ₂ layer, and the low refractive index material SiO ₂ layer is provided with a high Refractive index material Cr ₂ O ₃ layers, such high and low refractive index material film layers are arranged alternately, and the fifth layer is MgF ₂ . From the front of the substrate, the anti-blue light film consists of a first low-refractive index film layer 101, a second high-refractive index film layer 102, a third low-refractive index film layer 103, a fourth high-refractive index film layer 104, The fifth layer is MgF ₂ layer 105 . The substrate adopts a double-sided symmetrical structure, and the anti-blue light film consists of the first low-refractive index film layer 201, the second high-refractive index film layer 202, the third low-refractive index film layer 203, and the fourth high-refractive-index film layer from the back of the substrate. Refractive index film layer 204, fifth layer MgF ₂ layer 205.

The refractive index of the low refractive index material SiO ₂ layer is 1.3-1.7. The refractive index of the high refractive index material Cr ₂ O ₃ layer is 2.0-2.8. The refractive index of the MgF ₂ layer is 1.38-1.42.

The anti-blue light film consists of alternating high and low refractive index film layers and low refractive index film layers from the base, and the outermost layer is MgF ₂ layer. The thickness of the MgF ₂ layer is greater than the thickness of the high-refractive-index film layer and the low-refractive-index film layer. The thickness relationship of each film layer is as follows: the fifth broadband AR film layer (MgF ₂ ) > the second low refractive index film layer (SiO ₂ ) > the third high refractive index film layer (Cr ₂ O ₃ ) > the first The first high-refractive-index film layer (Cr ₂ O ₃ )>the fourth low-refractive-index film layer (SiO ₂ ). The total thickness of the SiO ₂ film layer of the low refractive index material is 55-75nm. The total thickness of the Cr ₂ O ₃ film layer of the high refractive index material is 20-30 nm. The thickness of the _MgF2 layer is 95-115nm. The anti-blue light film can partially block the transmittance in the 380nm-480nm band, improve the transmittance in the visible light range, and reduce the residual reflection in the whole band. Compared with Embodiment 1 and Embodiment 2, adding a MgF2 film layer can reduce the residual reflection to less than 1%.

The anti-blue light film can partially block the transmittance in the 380nm-480nm band, improve the transmittance in the visible light range, and reduce the residual reflection of the whole band.

Wherein, the low refractive index material SiO ₂ film layer and the high refractive index material Cr ₂ O ₃ film layer are plated on the substrate by magnetron sputtering. The electrons collide with the argon atoms during the process of accelerating and flying to the substrate under the action of the electric field, ionizing a large number of argon ions and electrons. The argon ions are accelerated to bombard the target under the action of the electric field, and a large number of target atoms are sputtered out, and the target atoms are deposited on the surface of the substrate to form a film.

Please see Figure 3-1 to Figure 3-7. The effect of the broadband AR protective film with anti-blue light function described in this example is as follows: full protection in the ultraviolet band; the single-sided barrier rate is 8%, and the double-sided barrier rate is 8%. Designed for a 14.82% anti-blue light film system, the stated effect is:

In the 380nm-450nm band, Rave<0.6%, Tave<87%, rejection rate>13%;

In the 450nm-500nm band, Rave<0.9%, Tave<96%, rejection rate>4%;

In the 500nm-780nm band, Rave<1.0%, Tave>97.5%, and rejection rate<2.5%.

It can be seen that the broadband AR protective film with anti-blue light function of the present invention not only realizes full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects the retina, but also ensures beneficial blue light. The high transmittance improves the visual clarity and authenticity. At the same time, the design of broadband AR film system reduces the residual reflection of the whole band, and has obvious anti-glare effect.

Embodiment Four

A broadband AR protective film with anti-blue light function, which is different from Embodiment 1 in that: Figure 4-1 is a schematic structural diagram of the anti-blue light film of the present invention.

The PC lens is provided with a low refractive index material SiO ₂ layer, and the low refractive index material SiO ₂ layer is provided with a high refractive index material Cr ₂ O ₃ layer, so that the high and low refractive index material film layers are alternately arranged, and the single surface is shared. Seven layers are required. The anti-blue light film consists of a first low-refractive-index film layer 101, a second high-refractive-index film layer 102, a third low-refractive-index film layer 103, a fourth high-refractive index film layer 104, and The fifth low-refractive index film layer 105 , the sixth high-refractive index film layer 106 , and the seventh low-refractive index film layer 107 . The substrate adopts a double-sided symmetrical structure, and the anti-blue light film consists of the first low-refractive-index film layer 201, the second high-refractive-index film layer 202, the third low-refractive-index film layer 203, and the fourth high-refractive-index film layer from the back of the substrate. The refractive index film layer 204 , the fifth low refractive index film layer 205 , the sixth high refractive index film layer 206 , and the seventh low refractive index film layer 207 .

Among them, the first low-refractive-index film layer 101, the second high-refractive-index film layer 102, the third low-refractive-index film layer 103, the fourth high-refractive-index film layer 104, the fifth low-refractive-index film layer 105. The sixth high-refractive-index film layer 106 and the seventh low-refractive-index film layer 107 respectively correspond to film thicknesses of 40-50nm, 20-25nm, 20-22nm, 70-80nm, 9-11nm, and 22 -32nm, 80-96nm. The total thickness of the SiO ₂ film layer of the low refractive index material is 160-180nm. The total thickness of the Cr ₂ O ₃ film layer of the high refractive index material is 130-145nm.

The anti-blue light film can partially block the transmittance in the 380nm-480nm band, improve the transmittance in the visible light range, and reduce the residual reflection of the whole band.

The anti-blue light film is plated on the substrate by magnetron sputtering. The electrons collide with the argon atoms during the process of accelerating and flying to the substrate under the action of the electric field, and a large number of argon ions and electrons are ionized. Argon ions are accelerated to bombard the target under the action of an electric field, and a large number of target atoms are sputtered out, and the target atoms are deposited on the surface of the substrate to form a film.

As shown in Figure 4-2 to Figure 4-7, the effect of the broadband AR protective film with anti-blue light function described in this example is as follows: full protection in the ultraviolet band; the average single-sided blocking rate is 23%, and the double-sided blocking rate was 37.4%. The effect is:

In the 380nm-450nm band, Rave<0.6%, Tave<70%, rejection rate>30%;

In the 450nm-500nm band, Rave<0.4%, Tave<87%, rejection rate>13%;

In the 500nm-780nm band, Rave<0.65%, Tave>98.5%, and rejection rate<1.5%.

It can be seen that the broadband AR protective film with anti-blue light function of the present invention not only realizes full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects the retina, but also ensures beneficial blue light The high transmittance improves the visual clarity and authenticity. At the same time, the design of broadband AR film system reduces the residual reflection of the whole band, and has obvious anti-glare effect.

The above is only a preferred embodiment of the present invention, so the scope of the present invention cannot be limited accordingly, that is, equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still be covered by the present invention within range.

Claims (3)

1. The protection film, its characterized in that: comprises a high refractive index material and a low refractive index material, wherein the high refractive index material is Cr ₂ O ₃ The low refractive index material comprises SiO ₂ The method comprises the steps of carrying out a first treatment on the surface of the Wherein: the Cr is ₂ O ₃ Has a refractive index of 2.0 to 2.8, siO ₂ The refractive index of (2) is 1.3-1.7; by Cr ₂ O ₃ The material has the absorption property of absorbing blue light, and the absorption of short waves is more obvious in a longer wave band;

the high refractive index film layer and the low refractive index film layer are arranged in a laminated mode; the high refractive index film layer and the low refractive index film layer are matched in an ultraviolet band to be completely prevented;

wherein: the substrate is of a double-sided symmetrical structure, and a first low-refractive-index film layer, a second high-refractive-index film layer, a third low-refractive-index film layer, a fourth high-refractive-index film layer and a fifth low-refractive-index film layer are sequentially arranged from the front side to the back side of the substrate; the first low refractive index film layer, the third low refractive index film layer and the fifth low refractive index film layer are made of SiO ₂ The method comprises the steps of carrying out a first treatment on the surface of the The second high refractive index film layer and the fourth high refractive index film layer are made of Cr ₂ O ₃ The method comprises the steps of carrying out a first treatment on the surface of the The total thickness of the low refractive index film layer is larger than that of the high refractive index film layer, the total thickness of the low refractive index film layer is 300-350nm, and the total thickness of the high refractive index film layer is 10-30nm; the thickness relation of each film layer is as follows: first layer of low refractive index film>Fifth layer low refractive index film>Third layer of low refractive index film>Fourth high refractive index film>A second high refractive index film layer;

in single sided barriers:

rave <2%, tave <85%, and barrier ratio >15% in 380-450 nm wave band;

rave <1%, tave <91% and blocking rate >9% in the wave band of 450-500 nm;

rave <2%, tave >94% and blocking rate <6% in the 500nm-780nm wave band.

2. The protective film according to claim 1, wherein: the substrate is selected from at least one of fluorogenic glass, light crown glass, phosphorous crown glass, heavy phosphorous crown glass, barium crown glass, heavy-duty glass, copper-cushing glass, custard flint glass, light flint glass, australite glass, heavy barium flint glass, heavy flint glass, copper flint glass, heavy copper flint glass, and specialty flint glass.

3. The protective film according to claim 1, wherein: the substrate is selected from at least one of polyethylene terephthalate, polycarbonate, cellulose triacetate, polymethyl methacrylate, polycarbonate/polymethyl methacrylate composite material, polyimide, polypropylene, polyvinyl chloride, polyvinyl butyral, ethylene vinyl acetate copolymer or polyurethane elastomer, polytetrafluoroethylene, fluoroethyl propylene and polyvinylidene fluoride.

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