CN111948746B - Blue light protection multilayer optical film - Google Patents
Blue light protection multilayer optical film Download PDFInfo
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- CN111948746B CN111948746B CN202010802952.0A CN202010802952A CN111948746B CN 111948746 B CN111948746 B CN 111948746B CN 202010802952 A CN202010802952 A CN 202010802952A CN 111948746 B CN111948746 B CN 111948746B
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Abstract
The invention discloses a blue light protection multilayer optical film, which comprises a substrate, a low refractive index film layer and a high refractive index film layer, wherein the low refractive index film layer and the high refractive index film layer are arranged above the substrate, the optical film meets the requirement that the central wavelength is 450nm, the full width at half maximum of a spectrum is 50nm, the narrow-band blue light filtering is realized, and the following conditions are met: the transmittance in the wave band of 400nm-440nm is 75% -90%; the transmittance at the wave band of 440nm-460mm is less than or equal to 75 percent; the transmittance at the wave band of 460nm-500mm is more than or equal to 80 percent; the transmittance of the glass is more than or equal to 95 percent in the wave band of 500nm-780 mm. The color balance compensation blue light blocking optical film prepared by alternately depositing the high-refractive-index material film layer and the low-refractive-index material film layer ensures high transmittance of the residual visible light wave band in the wide wave band, simultaneously reduces the problems of color shift and chromatic aberration of the system caused by blue light blocking, improves the wearing comfort level of a user, can effectively relieve visual fatigue, protects the retina and improves the definition and authenticity of vision.
Description
Technical Field
The invention relates to the field of optical films, in particular to a blue light protection multilayer optical film.
Background
Blue light is an important component of natural light, and the blue light hazard refers to retinal damage caused by photochemical reactions caused by irradiation with radiant light having a wavelength of 400 to 500 nm. The blue light radiation has a short wavelength compared with radiation in other wave bands, so the energy distribution is high, and the human eyes are greatly damaged. Along with arousal of consumer 'blue light protection' consciousness, the blue light protection has attracted attention of consumers.
In 2017 Tsz Wing Leung et al (see PLoS one.12(1).2017) indicated that blue light (about 430m) has a phototoxic effect on human eye health, and especially on the retina. Spark-generated laboratory evidence at columbia university indicates that RPE cell death by blue light may be reduced by up to 80% if about 50% of the blue light in the wavelength range of 430 ± 30 nm is blocked.
On the other hand, the blue light with longer wavelength band is also the regulator of human body biological clock. There is clear evidence that blue light is an important factor for stimulating the brain to release melatonin, which is an important index for regulating biological clock of human body, so blue light (mainly 460nm band) plays an indispensable role for human body. Although the problem of blue light prevention and control is mentioned by coloring, reflection and the like (in the patent document with publication number CN104476874B, the method of preparing the blue light prevention protective film by coloring is described, in the patent document with publication number CN205374778U, the method of preparing the blue light prevention film layer by reflection is described.
For example, CN105899975A discloses that most of the high-energy short-wave blue light is filtered by adding absorbent such as black essence, yellow essence, azo permanent yellow dye, azo permanent orange dye and the like into the blue-light-proof film layer. The high absorption of blue blocking dyes provides a strong barrier to wavelengths in the range of 400nm to 500nm and even all wavelengths, and thus the lenses are typically yellow or amber tinted. For many people, such yellow or amber tinted lenses can cause eye strain. Furthermore, such tint may interfere with the normal color perception of the lens user, making it difficult to correctly perceive the color of a traffic light or sign, for example. Meanwhile, the traditional blue light blocking lens reduces the visible light transmittance, thereby posing a threat to eye health problems.
And the other one adopts an optical film coating mode, and designs and optimizes a cut-off filter by utilizing an 1/4 wave stack and taking long wave pass as an initial structure through an inter-film interference principle to realize broadband blue light blocking filtering, namely the broadband filter. For example, reference 1(CN206618874U) discloses a blue light-shielding film structure (corresponding to a blue light-shielding functional material), and specifically discloses the following features (see [0002 ] in the specification)]-[0029]Fig. 13), the film structure includes six layers of films, a first layer of high refractive index film, a second layer of low refractive index film, a third layer of high refractive index film, a fourth layer of low refractive index film, a fifth layer of high refractive index film, and a sixth layer of low refractive index film, respectively, from the inside out; wherein the low refractive index film contains SiO2The high refractive index film has a composition of Ti3O5. The light splitting effect of the single-sided coated film of the blue-light-proof film structure can reach the following index of 400nm-500nm Tave<70%, apparently a broadband barrier.
In view of this, it is important to design a band-stop filter (negative filter) with a central wavelength of 450nm to realize a blue light attenuation film of a complementary spectral line type for the spectral power distribution of LEDs.
Disclosure of Invention
The blue protection lens aims at the problems that the radiation spectrum of a blue LED cannot be effectively blocked in the prior art to realize blue protection, the transmission color balance function of the lens can be influenced, and the like. Embodiments of the present application provide a blue-light protective multilayer optical film to solve the above-mentioned existing problems.
In a first aspect, an embodiment of the present application provides a blue light protection multilayer optical film, where the optical film includes a substrate, and a low refractive index film layer and a high refractive index film layer disposed above the substrate, and the optical film satisfies a central wavelength of 450nm, and a full width at half maximum of a spectrum achieves narrow-band blue light filtering in a range of 50nm and the following conditions:
the transmittance in the wave band of 400nm-440nm is 75% -90%;
the transmittance at the wave band of 440nm-460mm is less than or equal to 75 percent;
the transmittance at the wave band of 460nm-500mm is more than or equal to 80 percent;
the transmittance in the wave band of 500nm-780mm is more than or equal to 95 percent.
The optical film can partially block the transmittance of a wave band of 410nm-500nm, improve the transmittance in a visible light range, compensate the problem of color shift caused by insufficient blue light content through the (400-.
In some embodiments, the low refractive index film layers and the high refractive index film layers are alternately stacked in sequence on the substrate. Blue light filtering is realized through the alternative setting of the high-low refractive index material film layer on the substrate, and blue light protection is realized.
In some embodiments, the optical film includes a core film stack and auxiliary film layers disposed on both sides of the core film stack. A band-stop filter (negative filter) with the central wavelength of 450nm can be constructed through the core film stack and the auxiliary film layer so as to realize the blue light attenuation film aiming at the complementary spectral line type of the LED spectral power distribution.
In some embodiments, the core film stack is formed by alternately stacking high refractive index film layers with different refractive indexes, and the auxiliary film layers are formed by sequentially alternately stacking low refractive index film layers and high refractive index film layers. The core film stack is designed by using a high-refractive-index film stack, so that the bandwidth of narrow-band trapped waves is greatly reduced. Meanwhile, the high-refractive-index combination has larger ripples in the visible light long-wavelength band, so that the matching auxiliary film layer realizes the effects of anti-reflection and ripple elimination.
In some embodiments, the core film stack is formed by alternately overlapping low-refractive-index materials with different refractive indexes, and the auxiliary film layers are formed by alternately overlapping low-refractive-index film layers and high-refractive-index film layers in sequence. The core membrane stack adopts a low-refractive-index membrane stack design, and the bandwidth of the narrow-band trapped wave is compressed. Meanwhile, the low-refractive-index combination has better admittance matching in a visible light long wavelength pass band, so that the influence of permeability improvement and ripple elimination can be realized without additionally adding a low-refractive-index matching material.
In some embodiments, the first layer of the optical film adjacent to the substrate is a low refractive index film layer. The first layer close to the substrate is a low-refractive-index film layer, and long-wave-pass structures are formed in a laminated mode in sequence, and blue light filtering is achieved.
In some embodiments, the transmittance in the 440nm-460mm band is 45% or less. Deep barriers are achieved under this condition.
In some embodiments, the transmittance in the 440nm-460mm band is less than or equal to 60%. Moderate barrier is achieved under this condition.
In some embodiments, color balance is achieved with color coordinates in the 380nm-780nm transmission spectrum in the total visible band lying in the range (0.33 ± 0.05 ). The reduction of the whole light transmittance of the lens is avoided, the color vision contrast sensitivity of a wearer can be effectively improved, and the film has a narrow-band filtering function, so that the light energy in the ranges of 400-440nm and 460-500nm can compensate a part of attenuated blue light, and further the color balance function is realized.
In some embodiments, the high refractive index film layer is made of a high refractive index material, the high refractive index material has a refractive index of 2.0-2.8, the low refractive index film layer is made of a low refractive index material, the low refractive index material has a refractive index of 1.3-2.0, the high refractive index material is selected from at least one of titanium dioxide, hafnium dioxide, tantalum pentoxide, niobium pentoxide, zirconium dioxide, silicon nitride and zinc sulfide or a mixture of any two of the titanium dioxide, the hafnium dioxide, the tantalum pentoxide, the niobium pentoxide, the zirconium dioxide, the silicon nitride and the zinc sulfide, and the low refractive index material is selected from at least one of silicon dioxide, aluminum oxide and magnesium fluoride or a mixture of any two of the silicon dioxide, the aluminum oxide and the magnesium fluoride. The low-refractive-index film layer and the high-refractive-index film layer in the optical film can be realized through the materials.
The blue light protection multilayer optical film provided by the invention ensures high transmittance of the residual visible light wave band in a wide wave band, simultaneously reduces the problems of color cast and chromatic aberration of the system caused by blue light obstruction, improves the wearing comfort level of a user, can effectively relieve visual fatigue, protects retina and improves the definition and authenticity of vision. BY applying the basic theory of narrow-band film system design and combining the multi-beam interference principle, the peak wavelength of the LED prepared BY comparing the blue light hazard function B (lambda) with the visual function M (lambda) and analyzing the blue LED and the yellow fluorescent powder YAG (BY method) is analyzed. Considering that the LED spectral transmittance T (lambda) has a valley transmission curve at 450nm and a blue light hazard weight wave band linear complementary design, a blue light blocking transmittance line type with transmittance having a line shape complementary with a blue light hazard function and having a broadband attenuation effect is designed, and the blue light blocking lens is prepared by alternately depositing a high-refractive-index all-dielectric material and a low-refractive-index all-dielectric material film layer. The damage of human retina of blue light is reduced to the maximum extent, the transmittance of (440nm-460nm) wavelength is reduced, and the problem of color cast caused by insufficient blue light content is compensated by the high transmittance of (400-440nm, 460-500nm) short wavelength blue light. The transmittance in the wave band of 460nm-500nm is more than or equal to 80 percent. The spectral characteristics of the waveband are set to realize the residual blue waveband and the perception effect of human eyes on blue color perception, so that the color balance compensation of the blue waveband is realized. The transmittance of the glass is more than or equal to 90 percent in the wave band of 500nm-780 mm. The spectral characteristics of this band are set to achieve high transmission in the remaining visible band. The color coordinates of the transmission spectrum of the whole visible light wave band of 380nm-780nm are close to the central white point (0.333 ), namely in the range of (0.33 +/-0.05, 0.33 and 0.05). The color coordinate requirement can better match color balance to achieve color fidelity, and meanwhile, the whole light transmittance of the lens can not be reduced, and the color vision contrast sensitivity of a wearer can be effectively improved.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the invention. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
FIG. 1 is a schematic view of a blue-light protection multilayer optical film in accordance with one embodiment of the present application;
FIG. 2 is a graph showing transmittance results of a blue-light protective multilayer optical film according to a first embodiment of the present application;
FIG. 3 is a schematic view of a blue-light protecting multilayer optical film according to example two, three, or four of the present application;
FIG. 4 is a graph showing transmittance results of a blue-light protective multilayer optical film in example two of the present application;
FIG. 5 is a graph showing transmittance results of blue light protective multilayer optical films in example III of the present application;
fig. 6 is a graph showing transmittance results of a blue-light protective multilayer optical film in example four of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example one
The blue light protection multilayer optical film provided in this embodiment includes a substrate 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 disposed. Fig. 1 is a schematic structural view of the blue-light protection multilayer optical film of the present embodiment, in which the film layers are only the number of layers, not representing the actual thickness of the film layers.
The substrate of this example was a PC lens (polycarbonate), which has the advantages of excellent impact resistance, high refractive index, light specific gravity and 100% uv protection. Of course, as the substrate, 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), Fluoroethylpropylene (FEP), and polyvinylidene fluoride (PVDF) may be used, as necessary.
The material with low refractive index is SiO2TiO is selected as the high-refractive-index material2And the high-refractive index material film layers and the low-refractive index material film layers on the substrate are alternately arranged. As shown in table 1, the blue-light protection multilayer optical film of the present embodiment includes 13 layers in order from the front surface of the substrate, namely, 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 so on. 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 according to the needs. Low refractive index material SiO2The refractive index of the layer is 1.465. High refractive index material TiO2The refractive index of the layer was 2.35. Wherein: the total thickness of the low refractive index film layer is greater than that of the high refractive index film layer, the total thickness of the low refractive index film layer is 100-150nm, and the total thickness of the high refractive index film layer is 200-300 nm. The lens material is K9 glass, and the deposition optimization parameters of the multilayer medium film system with selective attenuation function deposited on the front surface of the lens obtained by the simulation method are shown in Table 1. Table 1 also shows the film structure of the broadband blue light protection optical multilayer film in the prior art for reference and comparison, and the initial film structure thereof adopts a long-wave pass structure to realize blue light filtering. This blue-proofThe light film comprises 13 layers in sequence from the front surface of the substrate, namely 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 like. The low refractive index material is SiO2Layer, refractive index 1.465. The high refractive index material is TiO2Layer, refractive index 2.35.
TABLE 1
Wherein the material with low refractive index is SiO2Film layer and high-refractive-index material TiO2The film layer can be formed by adopting the method of electron beam evaporation and ion beam assisted deposition, and the PC substrate is preferably kept at a lower temperature, so that the energy of high-energy ions can be properly controlled.
The blue light protection multilayer optical film of the embodiment can partially block the transmittance of the wavelength band of 410nm-500nm, improve the transmittance in the visible light range, and compensate the color shift problem caused by the insufficient content of the blue light through the (400-. The single-sided blocking effect is prepared as shown in FIG. 2, wherein the dotted line in FIG. 2 is the transmittance of the broadband blue-light protection optical multilayer film with the initial film structure of (0.5HL0.5H) ^3, and the solid line is the transmittance of the blue-light protection multilayer optical film with the improved film structure of (0.1H1.9L) ^7 in the embodiment.
The transmittance of the blue-ray protective multilayer optical film with the film layer structure of (0.1H1.9L) ^7 in the embodiment is as follows:
selecting the wavelength range of 400nm-440 nm;
the average transmittance was 84.132%; a maximum transmittance of 99.27% (409.51 nm);
selecting the wavelength range from 440nm to 460 nm;
a maximum transmittance of 62.775% (460 nm); a minimum transmittance of 58.407% (448 nm); the average transmittance was 59.606%;
selecting the wavelength range of 460nm-500 nm;
the average transmittance was 82.959%; a maximum transmittance of 99.241% (500 nm);
selecting the wavelength range of 500nm-780 nm;
the average transmittance was 97.602%; a maximum transmittance of 99.987% (580 nm);
moreover, the color coordinates of the overall transmission spectrum are close to the center white point (0.333 ), such as in the (X:0.3345, Y:0.3699) range.
Therefore, the blue light protection multilayer optical film with the color balance compensation function reduces the transmittance of short-wave harmful blue light, has the blue light prevention function, effectively protects the retina, has a certain color balance compensation function, relieves visual fatigue, and improves the definition and authenticity of vision. The problem of color cast caused by insufficient blue light content is solved through the blue light transmittance compensation of the wavelengths of (400-440nm and 460-500 nm).
Example two
The blue light protection multilayer optical film provided in this embodiment includes a substrate 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 disposed. Fig. 3 is a schematic structural diagram of the blue-light protection multilayer optical film of the present embodiment, wherein 201 is a symmetrical film layer, and the film layers in the diagram are only schematic layer numbers, and do not represent actual thicknesses of the film layers.
The substrate of this example was a PC lens (polycarbonate) which has excellent impact resistance, high refractive index, low specific gravity and 100% UV protection. Of course, as the substrate, 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), Fluoroethylpropylene (FEP), and polyvinylidene fluoride (PVDF) may be used as needed.
The material with low refractive index is SiO2TiO is selected as the high-refractive-index material2The high and low refractive index material film layers on the substrate are alternately arranged. SiO with low refractive index material on PC lens2Layer of said low refractive index material SiO2A high refractive index material TiO is arranged on the layer2The layers are arranged alternately, and seven layers are arranged on the single surface. As shown in table 2, 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 were formed. The difference from the first embodiment lies in the use of a symmetrical membrane stack design, which greatly simplifies the preparation process. 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 according to the needs. Wherein the material with low refractive index is SiO2The refractive index of the layer is 1.46, high refractive index material TiO2The refractive index of the layer was 2.35. Wherein: the total thickness of the low refractive index film layer is greater than that of the high refractive index film layer, the total thickness of the low refractive index film layer is 150nm for example, 100 nm, and the total thickness of the high refractive index film layer is 300nm for example. In this embodiment, the high refractive index material is titanium dioxide, the low refractive index material is silicon dioxide, the lens material is K9 glass, and the deposition parameters of the multilayer dielectric film system with selective attenuation function deposited on the front surface of the lens obtained by the simulation method are shown in table 2:
TABLE 2
| Film layer | Material | Thickness/nm |
| 1 | SiO2 | 640.56 |
| 2 | TiO2 | 7.76 |
| 3 | SiO2 | 292.31 |
| 4 | TiO2 | 8 |
| 5 | SiO2 | 292.31 |
| 6 | TiO2 | 7.76 |
| 7 | SiO2 | 640.56 |
Wherein, the material SiO with low refractive index2Film layer and high-refractive-index material TiO2The film layer can be formed by adopting the method of electron beam evaporation and ion beam assisted deposition, and the PC substrate is preferably kept at a lower temperature, so that the energy of high-energy ions can be properly controlled.
As shown in fig. 4, the blue light protection film with color balance compensation provided in this embodiment has the following effects: the blue light protection multilayer optical film can partially obstruct the transmittance of a wave band of 410nm-500nm, improve the transmittance in a visible light range, and compensate the problem of color cast caused by insufficient blue light content through the (400-440nm, 460-500nm) wavelength blue light compensation transmittance. Preparing a single-side barrier effect:
selecting the wavelength range of 400nm-440 nm;
the average transmittance was 89.321%; a maximum transmittance of 97.878% (413 nm);
selecting the wavelength range of 440nm-460 nm;
a maximum transmittance of 78.022% (460 nm); a minimum transmittance of 72.128% (446 nm); the average transmittance was 73.655%;
selecting the wavelength range of 460nm-500 nm;
the average transmittance was 92.96%; a maximum transmittance of 99.19% (488 nm);
selecting the wavelength range of 500nm-780 nm;
the average transmittance was 96.298%; a maximum transmittance of 99.64% (740 nm);
moreover, the color coordinates of the overall transmission spectrum are near the center white point (0.333 ), at (X:0.3236, Y: 0.3493).
Therefore, the blue light protection multilayer optical film with the color balance compensation function reduces the transmittance of short-wave harmful blue light, has the blue light prevention function, effectively protects the retina, has a certain color balance compensation function, relieves visual fatigue, and improves the definition and authenticity of vision. The problem of color cast caused by insufficient blue light content is compensated by the high transmittance of the short-wavelength blue light (400-420nm and 470-500 nm).
EXAMPLE III
The blue light protection multilayer optical film provided in the embodiment includes a substrate, wherein a core film stack and auxiliary film layers disposed on two sides of the core film stack are disposed on the substrate. The core film stack is formed by alternately overlapping high-refractive-index film layers with different refractive indexes, and the auxiliary film layers are formed by sequentially and alternately overlapping low-refractive-index film layers and high-refractive-index film layers. In this embodiment, the core film stack is formed by alternately stacking high refractive index film layers having different refractive indexes, and the auxiliary film layer is formed by sequentially alternately stacking the low refractive index film layer and the high refractive index film layer. Fig. 3 is a schematic structural diagram of the blue-light protection multilayer optical film of the present embodiment, in which 201 is an auxiliary film layer, and the film layers in the diagram are only schematic layer numbers, and do not represent actual thicknesses of the film layers.
The substrate of this example was a PC lens (polycarbonate), which has the advantages of excellent impact resistance, high refractive index, light specific gravity and 100% uv protection. Of course, as the substrate, 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), Fluoroethylpropylene (FEP), and polyvinylidene fluoride (PVDF) may be used as needed.
The core film stack of the blue-light protection multilayer optical film of the embodiment adopts a high-refractive-index combination, and the high-refractive-index material H1 is TiO2HFO is selected as the high refractive index material H22And the H1 and H2 film layers are alternately arranged. Two sides of the core membrane stack are respectively provided with 4 layers of auxiliary membrane layers, and the low-refractive index material L is SiO2TiO is selected as the high-refractive-index material H12H and L are alternately arranged. Twenty three layers are arranged on one surface of the membrane stack. The figure shows the first layer 101, the second layer 102, the third layer 103, the fourth layer 104, the fifth layer 105, and so on, adjacent to the substrate. The difference from the second embodiment is that the bandwidth of the narrow band notch is greatly compressed using a high index stack design. Meanwhile, the high-refractive-index combination has larger ripples in the visible light long-wavelength band, so that the matching AR film layer realizes anti-reflection and ripple elimination, and the number of layers can be increased or decreased according to the requirement.
Wherein, the low refractive index L material SiO2The refractive index of the layer is 1.46, the high refractive index H1 material TiO2The refractive index of the layer is 2.35, and the high refractive index H2 material HFO2The refractive index of the layer was 1.93. Wherein: the total thickness of the low refractive index film layer is greater than that of the high refractive index film layer, and the total thickness of the film layers is 2000-3000 nm. In this example, the high refractive index material is titanium dioxide, the low refractive index material is silicon dioxide, the lens material is K9 glass, and the lens front surface deposition has the optical selection obtained by the simulation methodThe multilayer dielectric film with selective attenuation function is shown in table 3.
TABLE 3
Wherein the material with low refractive index is SiO2Film layer and high refractive index material TiO2The film layer can be formed by adopting the method of electron beam evaporation and ion beam assisted deposition, and the PC substrate is preferably kept at a lower temperature, so that the energy of high-energy ions can be properly controlled.
The effect of the blue light protection functional film with color balance compensation described in this embodiment is shown in fig. 5: the anti-blue light film can partially block the transmittance of a wave band of 410nm-500nm, improve the transmittance in a visible light range, and compensate the color cast problem caused by insufficient blue light content through the (400-440nm, 460-500nm) wavelength blue light compensation transmittance. Preparing a single-side barrier effect:
selecting the wavelength range of 400nm-440 nm;
the average transmittance was 78.77%; a maximum transmittance of 99.276% (427 nm);
selecting the wavelength range from 440nm to 460 nm;
a minimum transmittance of 16.76% (444 nm); the average transmittance was 32.223%;
selecting the wavelength range of 460nm-500 nm;
the average transmittance was 94.254%; a maximum transmittance of 99.257% (463 nm);
selecting the wavelength range of 500nm-780 nm;
the average transmittance is 96.85%; maximum transmittance of 99.96% (762 nm);
further, the color coordinates of the entire transmission spectrum are close to the center white point (0.333 ) and are located at (X:0.3415, Y: 0.3831).
Therefore, the blue light protection film with color balance compensation reduces the transmittance of short-wave harmful blue light, has a blue light prevention function, effectively protects the retina, has a certain color balance compensation effect, relieves visual fatigue, and improves the definition and authenticity of vision. The problem of color cast caused by insufficient blue light content is compensated by the high transmittance of the short-wavelength blue light (400-420nm and 470-500 nm).
Example four
The blue light protection multilayer optical film provided in the embodiment includes a substrate, wherein a core film stack and auxiliary film layers disposed on two sides of the core film stack are disposed on the substrate. The core film stack is formed by alternately overlapping high-refractive-index film layers with different refractive indexes, and the auxiliary film layers are formed by sequentially alternately overlapping low-refractive-index film layers and high-refractive-index film layers. In this embodiment, the core film stack is formed by alternately stacking low refractive index film layers with different refractive indexes, and the auxiliary film layer is formed by sequentially alternately stacking the low refractive index film layer and the high refractive index film layer. Fig. 3 is a schematic structural diagram of the blue-light protection multilayer optical film of the present embodiment, in which 201 is an auxiliary film layer, and the film layers in the diagram are only schematic layer numbers, and do not represent actual thicknesses of the film layers.
The substrate of this example was a PC lens (polycarbonate) which has excellent impact resistance, high refractive index, low specific gravity and 100% UV protection. Of course, as the substrate, 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), Fluoroethylpropylene (FEP), and polyvinylidene fluoride (PVDF) may be used, as necessary.
The core film stack of the blue-light protection multilayer optical film adopts the combination of overall low-refractive-index materials, and the low-refractive-index material L is SiO2HFO is selected as the material H with relatively high refractive index2And the L and H material film layers are alternately arranged. Two sides of the core membrane stack are respectively provided with 4 layers of auxiliary membrane layers and low refractive index materialsSiO is selected as material L2High refractive index material Hselect HFO2H and L are alternately arranged. Twenty three layers are arranged on one surface of the membrane stack. The figure shows a first layer 101, a second layer 102, a third layer 103, a fourth layer 104, a fifth layer 105, and so on, adjacent to the substrate. The difference from the third example is that the bandwidth of the narrow band notch is compressed using a bulk low index stack design. Meanwhile, the low-refractive-index combination has better admittance matching in the visible light long-wavelength band, so that the influence of anti-reflection and ripple elimination is realized without additionally adding a low-refractive-index matching material, and the number of layers can be increased or decreased according to the requirement.
Wherein, the low refractive index L material SiO2The refractive index of the layer is 1.46, the high refractive index H1 material TiO2The refractive index of the layer is 2.35, and the high refractive index H2 material HFO2The refractive index of the layer was 1.93. Wherein: the total thickness of the low refractive index film layer is greater than that of the high refractive index film layer, and the total thickness of the film layers is 2000-3000 nm. In this embodiment, the high refractive index material is titanium dioxide, the low refractive index material is silicon dioxide, the lens material is K9 glass, and the multilayer dielectric film with selective attenuation function deposited on the front surface of the lens obtained by the simulation method is shown in table 4.
TABLE 4
Wherein, the material SiO with low refractive index2Film layer and high-refractive-index material TiO2The film layer can be formed by adopting the method of electron beam evaporation and ion beam assisted deposition, and the PC substrate is preferably kept at a lower temperature, so that the energy of high-energy ions can be properly controlled.
The effect of the blue-light protection multilayer optical film with color balance compensation of the present embodiment is shown in fig. 6: the blue light protection multilayer optical film can partially obstruct the transmittance of a wave band of 410nm-500nm, improve the transmittance in a visible light range, and compensate the problem of color cast caused by insufficient blue light content through the (400-440nm, 460-500nm) wavelength blue light compensation transmittance. Preparing a single-side barrier effect:
selecting the wavelength range of 400nm-440 nm;
the average transmittance was 83.478%; maximum transmittance of 99.99% (411 nm);
selecting the wavelength range from 440nm to 460 nm;
a minimum transmittance of 22.786% (444.93 nm); the average transmittance was 35.936%;
selecting the wavelength range of 460nm-500 nm;
the average transmittance was 93.488%; maximum transmittance of 99.83% (464 nm);
selecting the wavelength range of 500nm-780 nm;
the average transmittance was 96.44%; a maximum transmittance of 99.952% (512 nm);
further, the color coordinates of the entire transmission spectrum are close to the center white point (0.333 ) and are located at (X:0.3359, Y: 0.3768).
Therefore, the blue light protection film with color balance compensation reduces the transmittance of short-wave harmful blue light, has a blue light prevention function, effectively protects the retina, has a certain color balance compensation effect, relieves visual fatigue, and improves the definition and authenticity of vision. The problem of color cast caused by insufficient blue light content is compensated by the high transmittance of the short-wavelength blue light (400-420nm and 470-500 nm).
The blue light protection multilayer optical film provided by the invention ensures high transmittance of the residual visible light wave band in a wide wave band, simultaneously reduces the problems of color cast and chromatic aberration of the system caused by blue light obstruction, improves the wearing comfort level of a user, can effectively relieve visual fatigue, protects retina and improves the definition and authenticity of vision. BY applying the basic theory of narrow-band film system design and combining the multi-beam interference principle, the peak wavelength of the LED prepared BY blue light LED + yellow fluorescent powder YAG (BY method) is analyzed BY comparing a blue light hazard function B (lambda) and a visual function M (lambda). Considering that the LED spectral transmittance T (lambda) has a valley transmission curve at 450nm and a blue light hazard weight wave band linear complementary design, a blue light blocking transmittance line type with transmittance having a line shape complementary with a blue light hazard function and having a broadband attenuation effect is designed, and the blue light blocking lens is prepared by alternately depositing a high-refractive-index all-dielectric material and a low-refractive-index all-dielectric material film layer. The damage of the retina of the human eye with blue light is reduced to the maximum extent, the transmittance of the (440nm-460nm) wavelength is reduced, and the problem of color cast caused by insufficient blue light content is compensated by the high transmittance of the (400-440nm, 460-500nm) short-wavelength blue light. The transmittance in the wave band of 460nm-500nm is more than or equal to 80 percent. The spectral characteristics of the waveband are set to realize the residual blue waveband and the perception effect of human eyes on blue color perception, so that the color balance compensation of the blue waveband is realized. The transmittance of the glass is more than or equal to 90 percent in the wave band of 500nm-780 mm. The spectral characteristics of this band are set to achieve high transmission in the remaining visible band. The color coordinates of the transmission spectrum of the whole visible light wave band from 380nm to 780nm are close to the central white point (0.333 ), namely, are in the range of (0.33 +/-0.05, 0.33 soil 0.05). The color coordinate requirement can better match color balance to achieve color fidelity, and meanwhile, the whole light transmittance of the lens can not be reduced, and the color vision contrast sensitivity of a wearer can be effectively improved.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. The word 'comprising' does not exclude the presence of elements or steps not listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope.
Claims (6)
1. The blue light protection multilayer optical film is characterized by comprising a substrate, a low-refractive-index film layer and a high-refractive-index film layer, wherein the low-refractive-index film layer and the high-refractive-index film layer are arranged above the substrate, the optical film comprises a core film stack and auxiliary film layers arranged on two sides of the core film stack, the core film stack is formed by alternately superposing the high-refractive-index film layers with different refractive indexes, the auxiliary film layers are formed by sequentially alternately superposing the low-refractive-index film layers and the high-refractive-index film layers, the optical film meets the central wavelength of 450nm, and the full width at half maximum of the spectrum realizes narrow-band blue light filtering within the range of 50nm and the following conditions:
the transmittance range is 75-90% in the wave band of 400-440 nm;
the transmittance at the wave band of 440nm-460mm is less than or equal to 75 percent;
the transmittance at the wave band of 460nm-500mm is more than or equal to 80 percent;
the transmittance in the wave band of 500nm-780mm is more than or equal to 95 percent.
2. The blue-light protecting multilayer optical film according to claim 1, wherein the first layer of the optical film adjacent to the substrate is a low refractive index film layer.
3. The blue-light protective multilayer optical film according to claim 1, wherein the transmittance in the wavelength range of 440nm to 460mm is 45% or less.
4. The blue-light protective multilayer optical film according to claim 1, wherein the transmittance in the wavelength range of 440nm to 460mm is 60% or less.
5. The blue-light protecting multilayer optical film according to claim 1, wherein a color balance is achieved in a range of (0.33 ± 0.05) of a color coordinate of a transmission spectrum of 380nm to 780nm in an entire visible light band.
6. The blue-light protection multilayer optical film according to claim 1, wherein the high refractive index film layer is made of a high refractive index material, the refractive index of the high refractive index material is 2.0-2.8, the low refractive index film layer is made of a low refractive index material, the refractive index of the low refractive index material is 1.3-2.0, the high refractive index material is selected from at least one of titanium dioxide, hafnium dioxide, tantalum pentoxide, niobium pentoxide, zirconium dioxide, silicon nitride and zinc sulfide or a mixture of any two of the materials, and the low refractive index material is selected from at least one of silicon dioxide, aluminum oxide and magnesium fluoride or a mixture of any two of the materials.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430389A (en) * | 2007-11-06 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Membrane stack structure of blue light splitting piece |
| CN103676201A (en) * | 2013-11-26 | 2014-03-26 | 江苏硕延光学眼镜有限公司 | Blue-ray-level protective resin lens with refraction index of 1.67 and preparation method thereof |
| CN105527668A (en) * | 2016-01-12 | 2016-04-27 | 武汉华星光电技术有限公司 | Displayer and blue-light-preventing thin film thereof |
| CN106772744A (en) * | 2017-03-24 | 2017-05-31 | 杭州灯之塔科技有限公司 | A kind of anti-blue light eyeglass of colour balance, glasses, equipment and its manufacture method |
| CN108706889A (en) * | 2018-05-08 | 2018-10-26 | 北京汉能光伏投资有限公司 | A kind of film-coated plate and preparation method thereof and a kind of solar components |
| CN109270616A (en) * | 2018-10-25 | 2019-01-25 | 杭州灯之塔科技有限公司 | A kind of more paddy transmissive elements and preparation method thereof |
| CN208636452U (en) * | 2018-08-28 | 2019-03-22 | 中国南玻集团股份有限公司 | Film for eye, display screen and display |
| CN109716173A (en) * | 2016-08-09 | 2019-05-03 | 依视路国际公司 | It include the optical goods of the interference coatings near infrared region (NIR) with high reflection |
-
2020
- 2020-08-11 CN CN202010802952.0A patent/CN111948746B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430389A (en) * | 2007-11-06 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Membrane stack structure of blue light splitting piece |
| CN103676201A (en) * | 2013-11-26 | 2014-03-26 | 江苏硕延光学眼镜有限公司 | Blue-ray-level protective resin lens with refraction index of 1.67 and preparation method thereof |
| CN105527668A (en) * | 2016-01-12 | 2016-04-27 | 武汉华星光电技术有限公司 | Displayer and blue-light-preventing thin film thereof |
| CN109716173A (en) * | 2016-08-09 | 2019-05-03 | 依视路国际公司 | It include the optical goods of the interference coatings near infrared region (NIR) with high reflection |
| CN106772744A (en) * | 2017-03-24 | 2017-05-31 | 杭州灯之塔科技有限公司 | A kind of anti-blue light eyeglass of colour balance, glasses, equipment and its manufacture method |
| CN108706889A (en) * | 2018-05-08 | 2018-10-26 | 北京汉能光伏投资有限公司 | A kind of film-coated plate and preparation method thereof and a kind of solar components |
| CN208636452U (en) * | 2018-08-28 | 2019-03-22 | 中国南玻集团股份有限公司 | Film for eye, display screen and display |
| CN109270616A (en) * | 2018-10-25 | 2019-01-25 | 杭州灯之塔科技有限公司 | A kind of more paddy transmissive elements and preparation method thereof |
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Denomination of invention: A Blue Light Protective Multilayer Optical Thin Film Effective date of registration: 20230718 Granted publication date: 20220715 Pledgee: Bank of China Limited Xiamen Xiang'an sub branch Pledgor: Riccino (Xiamen) Optical Co.,Ltd. Registration number: Y2023980048786 |
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