CN110187425B - Material with blue light prevention function and protective film using material - Google Patents
Material with blue light prevention function and protective film using material Download PDFInfo
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- CN110187425B CN110187425B CN201910371619.6A CN201910371619A CN110187425B CN 110187425 B CN110187425 B CN 110187425B CN 201910371619 A CN201910371619 A CN 201910371619A CN 110187425 B CN110187425 B CN 110187425B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/207—Filters comprising semiconducting materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/226—Glass filters
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
Technical Field
The present invention relates to an optical material, and more particularly, to a material with blue light preventing function and a protective film using the same.
Background
Blue light is an important component of natural light, and blue light hazard refers to retinal damage caused by photochemical effects induced upon irradiation with radiation having a wavelength between 400 and 500 nm. With the awareness of consumers of "blue light protection", blue light protection has gained attention from a wide range of consumers. Currently, display screens or lighting systems on the market are often realized by adopting white light LEDs, and the most common mode is realized by adopting a mode of blue light emitted by gallium nitride and YAG fluorescent powder. The radiation spectrum intensity of the blue light LED is mainly concentrated in the range of 400-500mm, and particularly has strong radiation intensity in a low-energy blue light wave band. Because the shorter the wavelength, the more intense the energy, the shorter the wavelength blue light is, and therefore much more intense than the green-yellow-red light, and therefore much more damaging to the human eye. According to related studies, exposure to blue light with a wavelength of about 425nm accelerates the photooxidation reaction, and initiates the fundus retina to start a photooxidation mechanism, which is a main mechanism of causing the damage of mitochondrial DNA in retinal pigment epithelial cells to be the pathogenesis of macular degeneration (AMD); while blue light is also a regulator of a biological clock of a human body, clear evidence shows that blue light is an important factor for stimulating the brain to release melatonin, and melatonin is an important index for regulating the biological clock of the human body, so that blue light (mainly 460nm wave band) plays an indispensable role for the human body. Therefore, the blue light prevention should reduce harmful blue light (415 nm to 455 nm) as much as possible without damaging the color balance, while maximally ensuring the transmittance of beneficial blue light (455 nm or more).
According to investigation, the blue light blocking filter is helpful for teenagers, and can be used as a countermeasure to block high-dose blue light rays emitted by the LED screen, so that the negative effect of modern illumination on a night physiological system is reduced. Therefore, certain protection work needs to be carried out on the equipment, and the damage of blue light to human bodies is reduced.
In blue light prevention and treatment, two technical routes are mainly started at home and abroad, one is to adopt a coloring mode, and most of high-energy short-wave blue light can be filtered by adding absorbers such as black essence, yellow essence, azo permanent yellow dye, azo permanent orange dye and the like into a blue light prevention film layer. However, the method has stronger absorption to the wave band of 400nm to 500nm and even the whole wave band, and the blue light prevention protective film manufactured by the method influences the color sensitivity of a wearer, has lower applicability and can cause the change of vision chromatic aberration and other visual troubles after long-term use; in the patent document with publication number CN104476874B, it is described that the blue light preventing protective film is prepared by a coloring method. It can be seen that the dosage of the absorbent added by the method is not easy to control and is not beneficial to mass production.
Another common blue light prevention product in the market adopts a reflective technical route, namely adopts an optical coating mode, realizes short wave high reflection through an inter-film interference principle, and prepares a multilayer dielectric film with high reflectivity of 415nm to 455nm and high transmittance of 470nm to 760nm of blue light wave bands. Thereby realizing the function of partially blocking blue light with the wavelength of 400-480 nm. The highest radiation wavelength of blue light reaches 50% with the reflectivity of 400nm-450nm, and the reflectivity of 460nm-480nm reaches about 40%. With the method for blocking blue light by reflection, the transmittance of the blue light wave band of the display screen can be blocked, but the influence of external environment light is ignored. The most common external environment light is sunlight, and the film layer has a blue light wave band high-reflection structure, so that the reflection of blue light components in the environment light is very strong. More importantly, the blue-violet light reflection with too bright outer surface can also generate uncomfortable secondary blue light injury such as glare to surrounding people. In the publication No. CN205374778U, a method of preparing a blue light preventing film layer by using a reflection method is described. It can be seen that the blue light prevention film prepared by the method has serious and unfeasible reflection glare problem.
It can be seen that both the reflection and absorption methods described above are advantageous and not optimal.
Disclosure of Invention
The invention provides a material with a blue light prevention function and a protective film applying the material, which overcome the defects of a method with the blue light prevention function in the background technology.
One of the adopted technical schemes for solving the technical problems is as follows:
the material with blue light preventing function includes high refractive index material and low refractive index material, and the high refractive index material includes 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 At least one of them.
In one embodiment: the high refractive index material is Cr 2 O 3 。
In one embodiment: the low refractive index material comprises SiO 2 。
In one embodiment: the high refractive index material is a high refractive index film layer, the low refractive index material is 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: the high refractive index film layers and the 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.
The second technical scheme adopted for solving the technical problems is as follows:
the material with the blue light prevention function comprises a high refractive index material and a low refractive index material, wherein 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 scheme adopted for solving the technical problems is as follows:
the material with the blue light prevention function comprises a high refractive index material and a low refractive index material, wherein the high refractive index material is a high refractive index film layer, the low refractive index material is a low refractive index film layer, and the high refractive index film layer and the low refractive index film layer are matched in an ultraviolet band to be completely prevented; in single sided barriers:
rave <1.5%, tave <75% and blocking rate >25% in 380-450 nm wave band;
rave <0.6%, tave <86% and blocking rate >14% in the wave band of 450-500 nm;
rave <1.2%, tave >92% and blocking rate <8% in the 500nm-780nm band.
The fourth technical scheme adopted for solving the technical problems is as follows:
the material with the blue light prevention function comprises a high refractive index material and a low refractive index material, wherein the high refractive index material is a high refractive index film layer, the low refractive index material is a low refractive index film layer, and the high refractive index film layer and the low refractive index film layer are matched in an ultraviolet band to be completely prevented; 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 band.
The fifth technical scheme adopted for solving the technical problems is as follows:
the protective film with the blue light prevention function comprises a substrate, wherein 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 substrate, and the high refractive index film layer and the low refractive index film layer are arranged in a laminated mode.
In one embodiment: 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.
In one embodiment: if the outermost layer is coated with MgF with low refractive index material 2 The layer is composed of medium refractive index material and high refractive index material.
In one embodiment: the front and back surfaces of the substrate are both provided with the high refractive index film layer and the low refractive index film layer.
Compared with the background technology, the technical proposal has the following advantages:
the material of the technical scheme reduces harmful blue light (415 nm-455 nm) under the condition of not damaging color balance, ensures the transmittance of beneficial blue light (more than 455 nm) and the residual visible light wave band, reduces the residual reflection of the whole visible light wave band at the same time, so as to realize the purposes of good blue light blocking rate, low residual reflectivity (no glare), high light transmittance (visible light wave band), no chromatic aberration and comfort, and can effectively relieve visual fatigue, protect a vision omentum and promote visual definition and authenticity. Based on the basic theory of wide band AR film design, cr is used in combination with extinction coefficient of material 2 O 3 The material has unique absorption performance, and a broadband AR film stack with different blue light blocking capacities is designed.
Drawings
The invention is further described below with reference to the drawings and the detailed description.
FIG. 1-1 is a structural design diagram of a first embodiment;
FIGS. 1-2 are wavelength-transmittance curves of a blue light protection film according to an embodiment;
FIGS. 1-3 are wavelength-reflectance curves of a blue light protection film according to an embodiment;
FIGS. 1-4 are wavelength-absorptivity curves of a blue light protection film according to an embodiment;
FIGS. 1-5 are diagrams of transmission and residual reflection chromatograms of an embodiment blue light protection film;
FIGS. 1-6 illustrate one embodiment of Cr 2 O 3 Optical constant curve of the film;
FIGS. 1-7 illustrate an embodiment of SiO 2 Optical constant curve of the film;
FIG. 2-1 is a schematic diagram of a second film structure according to an embodiment;
FIG. 2-2 is a wavelength-reflectance curve of a second embodiment of a blue light protective film;
FIGS. 2-3 are wavelength-absorptivity curves of the exemplary two-layer blue light protection film;
FIGS. 2-4 are transmission and residual reflection chromaticity diagrams of the embodiment of the dual blue-light-preventing protective film;
FIGS. 2-5 illustrate exemplary Cr 2 O 3 Optical constant curve of the film;
FIGS. 2-6 illustrate example di SiO 2 Optical constant curve of the film.
FIG. 3-1 is a wavelength-transmittance curve of a three-way blue light protective film according to an embodiment;
FIG. 3-2 is a wavelength-reflectance curve of a three-way blue light protective film according to an embodiment;
FIGS. 3-3 are wavelength-absorptivity curves of the three-proofing blue light protective film according to the examples;
FIGS. 3-4 are transmission and residual reflection chromaticity diagrams of the three-proofing blue light protective film according to the embodiment;
FIGS. 3-5 illustrate an embodiment of triccr 2 O 3 Optical constant curve of the film;
FIGS. 3-6 illustrate an example trisio 2 Optical constant curve of the film;
FIGS. 3-7 are optical constant curves for an uncoated PC of example three.
FIG. 4-1 is a structural design diagram of a fourth embodiment;
FIG. 4-2 is a wavelength-transmittance curve of a four-blue-ray-blocking protective film according to an embodiment;
FIGS. 4-3 are wavelength-reflectance curves of the four-blue-light-blocking protective film of the embodiment;
FIGS. 4-4 are wavelength-absorptivity curves of the four-blue-ray-preventing protective film according to the embodiment;
FIGS. 4-5 are transmission and residual reflection chromaticity diagrams of the four-blue-light-preventing protective film of the embodiment;
FIGS. 4-6 show four Cr of the example 2 O 3 Optical constant curve of the film;
FIGS. 4-7 illustrate example IV SiO 2 Optical constant curve of the film.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
A broadband AR protection film with blue light prevention function comprises a substrate 3, wherein 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 substrate 3. Fig. 1-1 is a schematic structural diagram of a blue light preventing film according to an embodiment, in which the film layer is only a layer number, and does not represent the actual thickness of the film layer.
The substrate of the first embodiment adopts PC lens (polycarbonate), and has the advantages of excellent impact resistance, high refractive index, light specific gravity and 100% ultraviolet resistance. Of course, as required, the substrate may be one of optical plastic substrates such as 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 copolymer (EVA) or polyurethane elastomer (TPU), polytetrafluoroethylene (PTFE), fluoroethylpropene (FEP), and polyvinylidene fluoride (PVDF).
The PC lens is provided with a low refractive index material SiO 2 A layer of the low refractive index material SiO 2 The layer is provided with a high refractive index material Cr 2 O 3 The layers of the high-low refractive index material film layers are alternately arranged, and five layers are arranged on one side. The blue light preventing film comprises 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 a fifth low refractive index film layer 105 from the front surface of the substrate. The substrate adopts a double-sided symmetrical structure. The blue light preventing film comprises a first low refractive index film layer 201, a second high refractive index film layer 202, a third low refractive index film layer 203, a fourth high refractive index film layer 204 and a fifth low refractive index film layer 205 in sequence from the back of the substrate, and the thicknesses of the corresponding film layers on the front and back are preferably the same. Of course, the number of layers of the low refractive index film layer and the high refractive index film layer can be increased or decreased as required. The invention adopts symmetryThe film design greatly simplifies the production difficulty of the process, can obtain good blue light blocking effect from different surfaces, and solves the problems of glare and blue light secondary injury.
The low refractive index material SiO 2 The refractive index of the layer is 1.3-1.7.
The high refractive index material Cr 2 O 3 The refractive index of the layer is 2.0-2.8.
Wherein: 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 innermost film layer and the outermost film layer on the single side of the substrate are both low-refractive-index film layers, preferably, the thickness of the innermost film layer and the outermost film layer is larger than that of each film layer positioned between the two film layers, and further, preferably, the thickness of the innermost film layer is larger than that of the outermost film layer; the method specifically comprises the following steps: the first low refractive index film 101> the fifth low refractive index film 105> the third low refractive index film > the fourth high refractive index film 104> the second high refractive index film 102.
Wherein the low refractive index material SiO 2 Film layer and high refractive index material Cr 2 O 3 The film layer can be plated by adopting an electron beam evaporation and ion beam assisted deposition method, and the PC substrate is preferably kept at a lower temperature, so that the energy of high-energy ions can be properly controlled. For deposition by electron beam evaporation, cr is directly evaporated in the experimental process 2 O 3 Material, cr obtained by fitting 2 O 3 The optical constants are designed into a film system. For adopting sputtering deposition, the metal Cr target can be directly sputtered by direct current reactive sputtering, and Cr is generated by introducing oxygen for reactive sputtering 2 O 3 And (5) performing film system design by using software to fit to obtain optical constants.
Please refer to fig. 1-2 to fig. 1-7, the broadband AR protection film with blue light protection function according to the present embodiment has the following effects: the blue light preventing film can partially block the transmittance of 380nm-480nm wave bands, improve the transmittance in the visible light range and reduce the residual reflection of the whole wave bands. All prevention in ultraviolet band; and preparing the blue light prevention film system design with the single-sided blocking rate of 13% and the double-sided blocking rate of 23%. Single-sided barrier effect:
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 band.
FIGS. 1 to 4 show wavelength-absorptivity curves of the respective thin layers of the blue light-preventing protective film, wherein L1, L3, L5 are SiO 2 It can be seen that the thin layer has a low absorption rate. L2 and L4 are Cr 2 O 3 The thin layer has higher absorptivity due to higher extinction coefficient, and the absorption of short waves is more obvious in longer wave band.
The invention relates to a multi-beam interference principle, which is used for blocking specified harmful blue light wave bands to different degrees on the basis of a broadband antireflection film. The blocking rate can be selected from 10% -40%, and an AR film layer with full-band low residual reflectivity is prepared through film layer design. The choice of material is made by the different optical constant characteristics of the oxide material and the extinction coefficient of the high refractive index material. According to the Lorentz vibrator model distribution rule, due to Cr 2 O 3 Has steeper extinction coefficient linetype in the harmful blue light wave band and higher refractive index, thus Cr is selected 2 O 3 SiO as a high refractive index material 2 As the low refractive index material.
The broadband antireflection film system design is carried out by utilizing the multi-beam interference effect, and the film layer arrangement is generally formed by alternately arranging high-refractive-index materials and low-refractive-index materials (alternatively, the broadband antireflection film system can also be formed by alternately designing high-refractive-index materials and medium-refractive-index materials and plating low-refractive-index materials on the outermost layer). The absorption of the whole blue light preventing film in the harmful wave band is controlled by adjusting the thickness of the material and the layer number of the film, so that the attenuation of the harmful blue light wave band (415 nm-455 nm) and the regulation and control of other wave bands are realized, and the target value (the double-sided blocking rate of the harmful blue light wave band can be 20%,30%, 40% and the like) is reached.
Therefore, the broadband AR protection film with the blue light prevention function not only realizes the full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects retina, but also ensures the high transmittance of beneficial blue light, and improves the definition and the authenticity of vision. Meanwhile, the broadband AR film system design reduces the residual reflection of the whole wave band and has obvious anti-dazzle effect.
Example two
A broadband AR protective film with blue light prevention function, which is different from the first embodiment in that: the PC lens is provided with a low refractive index material SiO 2 A layer of the low refractive index material SiO 2 The layer is provided with a high refractive index material Cr 2 O 3 The layers, namely the high and low refractive index material film layers are alternately arranged, and five layers are needed for one side. The blue light preventing film comprises 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 a fifth low refractive index film layer 105 from the front surface of the substrate. The substrate adopts a double-sided symmetrical structure, and the blue light preventing film sequentially comprises a first low refractive index film layer 201, a second high refractive index film layer 202, a third low refractive index film layer 203, a fourth high refractive index film layer 204 and a fifth low refractive index film layer 205 from the back of the substrate.
Wherein the low refractive index material SiO 2 The total thickness of the film layer is 300-360nm. The high refractive index material Cr 2 O 3 The total thickness of the film layer is 35-55nm.
Wherein the low refractive index material SiO 2 Film layer and high refractive index material Cr 2 O 3 The film layer can be plated by adopting an electron beam evaporation method, and Cr is directly evaporated in the experimental process 2 O 3 Material, cr obtained by fitting 2 O 3 The optical constants are designed into a film system.
Please refer to fig. 2-1 to fig. 2-6, the broadband AR protection film with blue light protection function according to the present example has the following effects: all prevention in ultraviolet band; and preparing the blue light prevention film system design with the single-sided blocking rate of 18% and the double-sided blocking rate of 31%. Single-sided barrier effect:
rave <1.5%, tave <75% and blocking rate >25% in 380-450 nm wave band;
rave <0.6%, tave <86% and blocking rate >14% in the wave band of 450-500 nm;
rave <1.2%, tave >92% and blocking rate <8% in the 500nm-780nm band.
FIGS. 2 to 3 show wavelength-absorptivity curves of the respective thin layers of the blue light-preventing protective film, wherein L1, L3, L5 are SiO 2 It can be seen that the thin layer has a low absorption rate. L2 and L4 are Cr 2 O 3 The thin layer has higher absorptivity due to higher extinction coefficient, and the absorption of short waves is more obvious in longer wave band.
Therefore, the broadband AR protection film with the blue light prevention function not only realizes the full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects retina, but also ensures the high transmittance of beneficial blue light, and improves the definition and the authenticity of vision. Meanwhile, the broadband AR film system design reduces the residual reflection of the whole wave band and has obvious anti-dazzle effect.
Example III
A broadband AR protective film with blue light prevention function, which is different from the first embodiment in that: the PC lens is provided with a low refractive index material SiO 2 A layer of the low refractive index material SiO 2 The layer is provided with a high refractive index material Cr 2 O 3 Layers, such high-low refractive index material film layers are alternately arranged, and the fifth layer is MgF 2 . The blue light preventing film comprises 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 a fifth MgF layer from the front of the substrate 2 Layer 105. The substrate adopts a double-sided symmetrical structure, and the blue light preventing film sequentially comprises a first low refractive index film layer 201, a second high refractive index film layer 202, a third low refractive index film layer 203, a fourth high refractive index film layer 204 and a fifth MgF layer from the back of the substrate 2 Layer 205.
The low refractive index material SiO 2 The refractive index of the layer was 1.3 to 1.7. The high refractive index material Cr 2 O 3 The refractive index of the layer is 2.0-2.8. The MgF 2 The refractive index of the layer is 1.38-1.42.
The blue light preventing film is sequentially provided with a high refractive index film layer and a low refractive index film layer which are alternately arranged from a substrate, and the outermost layer is MgF 2 A layer. MgF (MgF) 2 The thickness of the layer is larger than that of the high refractive index film layer and the low refractive index film layer. The thickness relationship of each film layer is as follows: fifth layer broadband AR film (MgF) 2 )>A second low refractive index film layer (SiO 2 )>A third high refractive index film layer (Cr 2 O 3 )>First high refractive index film layer (Cr 2 O 3 )>Fourth low refractive index film layer (SiO) 2 ). The low refractive index material SiO 2 The total thickness of the film layer is 55-75nm. The high refractive index material Cr 2 O 3 The total thickness of the film layer is 20-30nm. The MgF 2 The thickness of the layer is 95-115nm. The blue light preventing film can partially block the transmittance of 380nm-480nm wave bands, improve the transmittance in the visible light range and reduce the residual reflection of the whole wave bands. Compared with the first embodiment and the embodiment, the MgF2 film layer is additionally plated to reduce residual reflection to less than 1%.
The blue light preventing film can partially block the transmittance of 380nm-480nm wave bands, improve the transmittance in the visible light range and reduce the residual reflection of the whole wave bands.
Wherein the low refractive index material SiO 2 Film layer and high refractive index material Cr 2 O 3 The film layer is plated on the substrate by a magnetron sputtering method. Electrons collide with argon atoms in the process of accelerating and flying to the substrate under the action of an electric field, and a large amount of argon ions and electrons are ionized. The argon ions are accelerated to bombard the target material under the action of an electric field, a large number of target atoms are sputtered, and the target atoms are deposited on the surface of the substrate to form a film.
Please refer to fig. 3-1 to fig. 3-7, the broadband AR protection film with blue light protection function in this example has the following effects: all prevention in ultraviolet band; preparing a blue light prevention film system design with a single-sided blocking rate of 8% and a double-sided blocking rate of 14.82%, wherein the blue light prevention film system design has the following effects:
rave <0.6%, tave <87% and blocking rate >13% in 380-450 nm wave band;
rave <0.9%, tave <96% and blocking rate >4% in the wave band of 450-500 nm;
in the wave band of 500nm-780nm, rave <1.0%, tave >97.5% and blocking rate <2.5%.
Therefore, the broadband AR protection film with the blue light prevention function not only realizes the full prevention of ultraviolet rays, reduces the transmittance of short-wave harmful blue light, effectively relieves visual fatigue, protects retina, but also ensures the high transmittance of beneficial blue light, and improves the definition and the authenticity of vision. Meanwhile, the broadband AR film system design reduces the residual reflection of the whole wave band and has obvious anti-dazzle effect.
Example IV
A broadband AR protective film with blue light prevention function, which is different from the first embodiment in that: fig. 4-1 is a schematic structural diagram of the blue light preventing film of the present invention.
The PC lens is provided with a low refractive index material SiO 2 A layer of the low refractive index material SiO 2 The layer is provided with a high refractive index material Cr 2 O 3 The layers of the high-low refractive index material film layers are alternately arranged, and seven layers are needed on one side. The blue light preventing film comprises 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, a fifth low refractive index film layer 105, a sixth high refractive index film layer 106 and a seventh low refractive index film layer 107 from the front surface of the substrate. The substrate adopts a double-sided symmetrical structure, and the blue light preventing film sequentially comprises a first low refractive index film layer 201, a second high refractive index film layer 202, a third low refractive index film layer 203, a fourth high refractive index film layer 204, a fifth low refractive index film layer 205, a sixth high refractive index film layer 206 and a seventh low refractive index film layer 207 from the back of the substrate.
Wherein the first, second, third, fourth, fifth, sixth, and seventh low refractive index layers 101, 102, 103, 104, 105, 106, and 106 are providedThe refractive index film 107 has a thickness of 40-50nm, 20-25nm, 20-22nm, 70-80nm, 9-11nm, 22-32nm, and 80-96nm. The low refractive index material SiO 2 The total thickness of the film layer is 160-180nm. The high refractive index material Cr 2 O 3 The total thickness of the film layer is 130-145nm.
The blue light preventing film can partially block the transmittance of 380nm-480nm wave bands, improve the transmittance in the visible light range and reduce the residual reflection of the whole wave bands.
The blue light preventing film is plated on the substrate by a magnetron sputtering method. Electrons collide with argon atoms in the process of accelerating and flying to the substrate under the action of an electric field, and a large amount of argon ions and electrons are ionized. The argon ions are accelerated to bombard the target material under the action of an electric field, a large number of target atoms are sputtered, and the target atoms are deposited on the surface of the substrate to form a film.
Please refer to fig. 4-2 to fig. 4-7, the broadband AR protection film with blue light protection function in this example has the following effects: all prevention in ultraviolet band; the average single-sided blocking rate was 23% and the double-sided blocking rate was 37.4%. The effects are as follows:
rave <0.6%, tave <70%, and blocking rate >30% in 380nm-450nm wave band;
rave <0.4%, tave <87% and blocking rate >13% in the wave band of 450-500 nm;
in the wave band of 500nm-780nm, rave <0.65%, tave >98.5% and blocking rate <1.5%.
Therefore, the broadband AR protection film with the blue light prevention function not only realizes the total prevention of ultraviolet rays, reduces the transmittance of short wave harmful blue light, effectively relieves visual fatigue, protects retina, but also ensures the high transmittance of beneficial blue light, and improves the definition and the authenticity of vision. Meanwhile, the broadband AR film system design reduces the residual reflection of the whole wave band and has obvious anti-dazzle effect.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
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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