Dual-band reflection optical film system and optical lens

Abstract

The invention discloses a dual-band reflection optical film system and an optical lens. The film system comprises seven layers of all-dielectric optical films which are a trititanium pentoxide layer, a silicon dioxide layer, a trititanium pentoxide layer, a silicon dioxide layer, a zirconium dioxide layer, a trititanium pentoxide layer and a silicon dioxide layer in sequence, the reflectivity of the film system in the blue light band of 385-445 nm is 20-35%, the reflectivity in the near-infrared band of 780-1400 nm is larger than or equal to 40%, the reflectivity in the visible light band of 500-780 nm is smaller than or equal to 1%, and the film system is of an absorption-free structure. The film system is designed based on an all-dielectric pure interference structure, accurate regulation and control of multiband spectrums are achieved in a single film system, and the film system has the three characteristics of short-wave blue light blocking, near-infrared efficient heat insulation and extremely high visible light transmission. The invention fundamentally overcomes the technical bottlenecks of single function, heat accumulation caused by photo-thermal conversion, light transmittance damage and the like of the traditional absorption type protective lens, and is suitable for various visual protection products with strict requirements on color rendition degree and thermal protection.

Description

Technical Field

[0001] This invention relates to the field of optical thin film technology, and in particular to a dual-band reflective optical film system and an optical lens containing the film system, which is especially suitable for visual protection products that simultaneously protect against blue light and infrared rays. Background Technology

[0002] With the widespread use of electronic display devices and increased time spent outdoors, the problem of harmful light radiation to the human eye is becoming increasingly prominent. Among them, blue light in the 385-445 nm wavelength band can penetrate the lens and reach the retina, and prolonged exposure may lead to eye fatigue, macular degeneration and other eye diseases; near-infrared light in the 780-1400 nm wavelength band mainly produces a thermal effect, causing burning sensation, dryness and discomfort in the eyes.

[0003] There are currently two main types of protective lenses on the market:

[0004] One type is the absorptive protective lens, which blocks specific wavelengths of light by adding absorbents to the substrate or coating the surface with an absorptive film. This type of lens has a significant drawback: 1. The absorbed light energy is converted into heat energy, causing the lens temperature to rise and resulting in poor wearing comfort; 2. Long-term use may lead to a decrease in protective performance due to material aging; 3. It also absorbs some visible light, affecting light transmittance and color accuracy.

[0005] Another type is reflective protective lenses, which typically use single or multiple layers of dielectric film to achieve reflection of specific wavelengths. However, existing technologies are mostly focused on single-wavelength protection, such as only protecting against blue light or only protecting against infrared rays. It is difficult to achieve dual high-efficiency reflection of blue light and infrared rays while maintaining high light transmittance in a wide visible light band. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-band reflective optical film system that can simultaneously achieve efficient reflection of harmful short-wavelength blue light and near-infrared thermal radiation, while maintaining near-zero reflection and high light transmittance in the visible light band. Furthermore, this film system is a pure interference structure without absorption, which fundamentally eliminates the thermal accumulation effect.

[0007] To achieve the above objectives, the solution of the present invention is: a dual-band reflective optical film system, comprising: It includes seven optical thin films, and the structure of each film is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 140~150nm; The second film layer is a silicon dioxide layer with a physical film thickness of 280~290nm; The third film layer is a titanium pentoxide layer with a physical film thickness of 150~160nm; The fourth film layer is a silicon dioxide layer with a physical film thickness of 190~200nm; The fifth film layer is a zirconium dioxide layer with a physical film thickness of 35~40nm; The sixth film layer is a titanium pentoxide layer with a physical film thickness of 75~85nm; The seventh film layer is a silicon dioxide layer with a physical film thickness of 25~35nm; The film system has a reflectance of 20-35% in the 385-445nm blue light band, a reflectance of ≥40% in the 780-1400nm near-infrared light band, a reflectance of ≤1% in the 500-780nm visible light band, and a transmittance of ≥99%.

[0008] Furthermore, the refractive index of the titanium pentoxide layer is 2.05~2.15; the refractive index of the silicon dioxide layer is 1.45~1.47; and the refractive index of the zirconium dioxide layer is 1.83~1.87.

[0009] Furthermore, the structure of each membrane layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 144 nm; The second film layer is a silicon dioxide layer with a physical film thickness of 288 nm. The third film layer is a titanium pentoxide layer with a physical film thickness of 154 nm; The fourth film layer is a silicon dioxide layer with a physical film thickness of 196 nm; The fifth film layer is a zirconium dioxide layer with a physical film thickness of 38 nm; The sixth film layer is a titanium pentoxide layer with a physical film thickness of 80 nm; The seventh film layer is a silicon dioxide layer with a physical film thickness of 30 nm; The reflectance of this film is 22% in the blue light band of 385~445nm, 42% in the near-infrared light band of 780~1400nm, and 0.49% in the visible light band of 500~780nm.

[0010] Furthermore, the dual-band reflective optical film system is disposed on the convex surface of the lens substrate.

[0011] The present invention also provides a dual-band reflective optical lens, comprising a lens substrate and a dual-band reflective optical film system as described in any one of claims 1 to 4, wherein the dual-band reflective optical film system is disposed on the convex surface of the lens substrate, the first film layer being close to the convex surface of the lens substrate, and the seventh film layer being away from the convex surface of the lens substrate.

[0012] Furthermore, the lens substrate is made of polycarbonate material with a refractive index of 1.50~1.60.

[0013] Furthermore, the refractive index of the lens substrate is 1.57.

[0014] Furthermore, it can be used to manufacture myopia glasses, sunglasses, sports glasses, driving glasses, protective glasses, or electronic display goggles.

[0015] After adopting the above solution, the beneficial effects of the present invention are as follows: The dual-band reflective optical film structure design enables the coating of the film onto the lens substrate to simultaneously achieve three major functions: blue light protection, infrared heat insulation, and high visible light transmittance in a single film system. This overcomes the technical problems of traditional absorptive protective lenses, such as single function, heat accumulation caused by photothermal conversion, and impaired light transmittance.

[0016] 1. Achieve precise control and coordinated protection of multi-band spectra. Achieving a reflectivity of 20-35% in the 385-445nm harmful blue light band effectively blocks short-wavelength blue light and alleviates eye strain. Achieving a high reflectivity of ≥40% in the 780-1400nm near-infrared band significantly reduces infrared heat radiation, achieving a cold-light mirror effect. Simultaneously, with a reflectivity ≤1% (transmittance ≥99%) in the 500-780nm visible light band, it provides true color reproduction and excellent clarity. Specifically: The first to fourth layers form an alternating high-low-high-low refractive index structure (Ti3O5 / SiO2 / Ti3O5 / SiO2), creating multiple λ / 4 optical thickness layers. These layers produce constructive interference in the blue light band, resulting in enhanced reflection; while in the visible light band (500~780nm), they form destructive interference, resulting in extremely low reflection.

[0017] The fifth zirconium dioxide layer and the sixth titanium pentoxide layer form a medium-to-high refractive index pair, and their optical thickness is designed to be λ / 4 stacked for the near-infrared band. By optimizing the thickness of the fifth and sixth layers, the interference maxima are shifted to the near-infrared region, achieving high reflectivity in this band.

[0018] In the visible light band, the optical thickness of each film layer is designed to produce destructive interference. The refractive index of the seven films exhibits a gradual distribution from the substrate outwards, which is equivalent to a broadband antireflection structure and effectively reduces the average reflectivity in the visible light band.

[0019] 2. Breaking through the bottleneck of inevitable color distortion in blue light protection, achieving ultimate color reproduction. Traditional blue light blocking lenses often suffer from a yellowish tint, while this invention effectively blocks short-wavelength blue light while ensuring a reflectivity of ≤1% (transmittance ≥99%) in the 500~780nm visible light band, achieving natural vision without color difference and extremely high clarity.

[0020] 3. Eliminate heat accumulation effect and achieve a truly cool light wearing experience. This invention features a non-absorption, pure interference structure. All film layers utilize oxide media, exhibiting extremely low absorption (<1%) in the 380–1400 nm wavelength range. Light energy is redistributed solely through reflection and transmission. Unlike traditional absorptive lenses that convert light energy into heat, causing eye dryness and discomfort, this invention directly reflects ≥40% of near-infrared thermal radiation, avoiding overheating and improving temperature control comfort during extended wear.

[0021] 4. Solves the problem of material aging and significantly extends the service life of the protective layer. The membranes of this invention are all oxide media, which are chemically stable and have extremely low absorption (<1%), thus completely avoiding the aging and performance degradation problems caused by long-term absorption of ultraviolet light and heat energy by traditional absorbers.

[0022] 5. Significantly simplifies the production process of high-end multifunctional lenses, enhancing their commercial value. This invention eliminates the need for expensive absorbents in the substrate and complex multiple coating processes. It only requires a single coating of the seven-layer optical film on the convex surface of the lens to efficiently mass-produce high-value-added lenses that integrate blue light protection, infrared heat insulation, and high visible light transmittance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the dual-band reflective optical lens structure of the present invention; Figure 2 This is a reflection spectrum curve of Embodiment 1 of the present invention; Figure 3 This is the reflectance spectrum curve of Comparative Example 1 of the present invention; Figure 4 This is the reflectance spectrum curve of Comparative Example 2 of the present invention; Figure 5 This is the reflectance spectrum curve of Comparative Example 3 of the present invention; Figure 6 This is the reflectance spectrum curve of Comparative Example 4 of the present invention; Figure 7 This is the reflectance spectrum curve of Comparative Example 5 of the present invention; Figure 8 This is the reflectance spectrum curve of Comparative Example 6 of the present invention.

[0024] Label Explanation: 1. Substrate; 2. Dual-band reflective optical film system; 21. First membrane layer; 22. Second membrane layer; 23. Third membrane layer; 24. Fourth membrane layer; 25. Fifth membrane layer; 26. Sixth membrane layer; 27. Seventh membrane layer. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This invention provides a dual-band reflective optical film system 2, such as... Figure 1 As shown, the film is composed of seven stacked layers: titanium pentoxide (Ti3O5), silicon dioxide (SiO2), and zirconium dioxide (ZrO2). The refractive index of the titanium pentoxide layer is 2.05~2.15; the refractive index of the silicon dioxide layer is 1.45~1.47; and the refractive index of the zirconium dioxide layer is 1.83~1.87.

[0027] The first film layer 21 is a titanium pentoxide layer with a physical film thickness of 140~150nm. This layer is a high refractive index material, providing a reflective substrate for subsequent film layers and enhancing the overall reflectivity.

[0028] The second film layer 22 is a silicon dioxide layer with a physical film thickness of 280~290nm. This layer is a low refractive index material, forming a refractive index pair with the first film layer, and enhancing the reflection of blue light in the 385~445nm range through interference.

[0029] The third film layer 23 is a titanium pentoxide layer with a physical film thickness of 150~160nm. This layer is a high refractive index material, which continues to provide a high refractive index and works in synergy with the second and fourth layers to further optimize the blue light reflection band.

[0030] The fourth film layer 24 is a silicon dioxide layer with a physical film thickness of 190~200nm. This layer is a low refractive index material, which produces an interference effect and optimizes the transmittance of visible light in the 500~780nm range.

[0031] The fifth film layer 25 is a zirconium dioxide layer with a physical film thickness of 35~40nm. This layer is a medium refractive index material, which forms a refractive index step with the sixth film layer, titanium pentoxide, and is key to initiating near-infrared reflection.

[0032] The sixth film layer 26 is a titanium pentoxide layer with a physical film thickness of 75~85nm. This layer is a high refractive index material, which works in conjunction with the fifth film layer, zirconium dioxide, to achieve ≥40% reflection by aligning the interference maxima to 780~1400nm.

[0033] The seventh film layer 27 is a silicon dioxide layer with a physical film thickness of 25~35nm. This layer serves as a protective film structure and, as the outermost layer, reduces surface reflection and improves overall light transmittance.

[0034] The above-mentioned film system has specific reflectivity and transmittance for the three main wavelength bands, as detailed below: Highly effective blue light protection: Achieves a reflectivity of 20-35% in the harmful blue light band of 385-445 nm, effectively blocking short-wavelength blue light and relieving eye fatigue.

[0035] Infrared thermal isolation: Achieves a high reflectivity of ≥40% in the 780~1400 nm near-infrared band, significantly reducing infrared thermal radiation and presenting a cold light effect.

[0036] High-fidelity visuals: Reflectivity ≤1% in the 500~780 nm visible light band, i.e., transmittance ≥99%, true color reproduction, and optimal clarity.

[0037] The present invention also provides a dual-band reflective optical lens, comprising a lens substrate 1 and the aforementioned dual-band reflective optical film system 2, wherein the dual-band reflective optical film system is disposed on the convex surface of the lens substrate.

[0038] The lens substrate is made of polycarbonate material, and the refractive index of the lens substrate is 1.50~1.60.

[0039] In the following examples and comparative examples, the lens substrate is made of polycarbonate material with a refractive index of 1.57, and is a standard lens with a diameter of 70 mm and a center thickness of 2.0 mm. All reflectance data were measured under perpendicular light incidence conditions after the film was coated on the convex surface of the substrate.

[0040] Example 1: The dual-band reflective optical lens provided in this embodiment includes a lens substrate and a dual-band reflective optical film system coated on the convex surface of the substrate. The structure of each layer of the film system is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 144 nm and a refractive index of 2.1.

[0041] The second film layer is a silicon dioxide layer with a physical film thickness of 288 nm and a refractive index of 1.46.

[0042] The third film layer is a titanium pentoxide layer with a physical film thickness of 154 nm and a refractive index of 2.1.

[0043] The fourth film layer is a silicon dioxide layer with a physical thickness of 196 nm and a refractive index of 1.46.

[0044] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 38 nm and a refractive index of 1.85.

[0045] The sixth film layer is a titanium pentoxide layer with a physical film thickness of 80 nm and a refractive index of 2.1.

[0046] The seventh film layer is a silicon dioxide layer with a physical film thickness of 30 nm and a refractive index of 1.46.

[0047] The reflectance spectrum curve of this embodiment is shown below. Figure 2 The reflectance spectrum curves of Examples 2 and 3 are similar to those of Example 1.

[0048] Example 2: The dual-band reflective optical lens provided in this embodiment includes a lens substrate and a dual-band reflective optical film system coated on the convex surface of the substrate. The structure of each layer of the film system is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 145 nm and a refractive index of 2.1.

[0049] The second film layer is a silicon dioxide layer with a physical film thickness of 283 nm and a refractive index of 1.46.

[0050] The third film layer is a titanium pentoxide layer with a physical film thickness of 155 nm and a refractive index of 2.1.

[0051] The fourth film layer is a silicon dioxide layer with a physical film thickness of 195 nm and a refractive index of 1.46.

[0052] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 36 nm and a refractive index of 1.85.

[0053] The sixth film layer is a titanium pentoxide layer with a physical film thickness of 78 nm and a refractive index of 2.1.

[0054] The seventh film layer is a silicon dioxide layer with a physical film thickness of 28 nm and a refractive index of 1.46.

[0055] Example 3: The dual-band reflective optical lens provided in this embodiment includes a lens substrate and a dual-band reflective optical film system coated on the convex surface of the substrate. The structure of each layer of the film system is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 148 nm and a refractive index of 2.1.

[0056] The second film layer is a silicon dioxide layer with a physical film thickness of 285 nm and a refractive index of 1.46.

[0057] The third film layer is a titanium pentoxide layer with a physical film thickness of 155 nm and a refractive index of 2.1.

[0058] The fourth film layer is a silicon dioxide layer with a physical thickness of 198 nm and a refractive index of 1.46.

[0059] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 37 nm and a refractive index of 1.85.

[0060] The sixth film layer is a titanium pentoxide layer with a physical film thickness of 83 nm and a refractive index of 2.1.

[0061] The seventh film layer is a silicon dioxide layer with a physical film thickness of 29 nm and a refractive index of 1.46.

[0062] Comparative Example 1: The optical lens provided in this comparative example differs from that in Example 1 mainly in that the thickness of the first film layer is too small, and the structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 100 nm and a refractive index of 2.1.

[0063] The second film layer is a silicon dioxide layer with a physical film thickness of 288 nm and a refractive index of 1.46.

[0064] The third film layer is a titanium pentoxide layer with a physical film thickness of 154 nm and a refractive index of 2.1.

[0065] The fourth film layer is a silicon dioxide layer with a physical thickness of 196 nm and a refractive index of 1.46.

[0066] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 38 nm and a refractive index of 1.85.

[0067] The sixth film layer is a titanium pentoxide layer with a physical film thickness of 80 nm and a refractive index of 2.1.

[0068] The seventh film layer is a silicon dioxide layer with a physical film thickness of 30 nm and a refractive index of 1.46.

[0069] The reflectance spectrum curve for this comparison is shown below. Figure 3 .

[0070] Comparative Example 2: The optical lens provided in this comparative example differs from that in Example 1 mainly in that the thickness of the first and sixth films is too small, and the structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 100 nm and a refractive index of 2.1.

[0071] The second film layer is a silicon dioxide layer with a physical film thickness of 288 nm and a refractive index of 1.46.

[0072] The third film layer is a titanium pentoxide layer with a physical film thickness of 154 nm and a refractive index of 2.1.

[0073] The fourth film layer is a silicon dioxide layer with a physical thickness of 196 nm and a refractive index of 1.46.

[0074] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 38 nm and a refractive index of 1.85.

[0075] The sixth film layer is a titanium pentoxide layer with a physical film thickness of 38 nm and a refractive index of 2.1.

[0076] The seventh film layer is a silicon dioxide layer with a physical film thickness of 30 nm and a refractive index of 1.46.

[0077] The reflectance spectrum curve for this comparison is shown below. Figure 4 .

[0078] Comparative Example 3: The optical lens provided in this comparative example differs from Example 1 mainly in the number of film layers; it lacks a zirconium dioxide layer. The structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 145 nm and a refractive index of 2.1.

[0079] The second film layer is a silicon dioxide layer with a physical film thickness of 228 nm and a refractive index of 1.46.

[0080] The third film layer is a titanium pentoxide layer with a physical film thickness of 155 nm and a refractive index of 2.1.

[0081] The fourth film layer is a silicon dioxide layer with a physical film thickness of 198 nm and a refractive index of 1.46.

[0082] The fifth film layer is a titanium pentoxide layer with a physical film thickness of 42 nm and a refractive index of 2.1.

[0083] The sixth film layer is a silicon dioxide layer with a physical film thickness of 85 nm and a refractive index of 1.46.

[0084] The reflectance spectrum curve for this comparison is shown below. Figure 5 .

[0085] Comparative Example 4: The optical lens provided in this comparative example differs from that of Example 1 mainly in the number of film layers and the placement of the zirconium dioxide layer. The structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 145 nm and a refractive index of 2.1.

[0086] The second film layer is a silicon dioxide layer with a physical film thickness of 228 nm and a refractive index of 1.46.

[0087] The third film layer is a zirconium dioxide layer with a physical film thickness of 155 nm and a refractive index of 1.85.

[0088] The fourth film layer is a silicon dioxide layer with a physical film thickness of 198 nm and a refractive index of 1.46.

[0089] The fifth film layer is a titanium pentoxide layer with a physical film thickness of 42 nm and a refractive index of 2.1.

[0090] The sixth film layer is a silicon dioxide layer with a physical film thickness of 85 nm and a refractive index of 1.46.

[0091] The reflectance spectrum curve for this comparison is shown below. Figure 6 .

[0092] Comparative Example 5: The optical lens provided in this comparative example differs from that of Example 1 mainly in the number of film layers, the number and position of the zirconium dioxide layers, and the structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 145 nm and a refractive index of 2.1.

[0093] The second film layer is a silicon dioxide layer with a physical film thickness of 228 nm and a refractive index of 1.46.

[0094] The third film layer is a zirconium dioxide layer with a physical film thickness of 155 nm and a refractive index of 1.85.

[0095] The fourth film layer is a silicon dioxide layer with a physical film thickness of 198 nm and a refractive index of 1.46.

[0096] The fifth film layer is a zirconium dioxide layer with a physical film thickness of 42 nm and a refractive index of 1.85.

[0097] The sixth film layer is a silicon dioxide layer with a physical film thickness of 85 nm and a refractive index of 1.46.

[0098] The reflectance spectrum curve for this comparison is shown below. Figure 7 .

[0099] Comparative Example 6: The optical lens provided in this comparative example differs from Example 1 mainly in the number of film layers; it lacks the zirconium dioxide layer and the titanium pentoxide layer. Its film layer structure is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 145 nm and a refractive index of 2.1.

[0100] The second film layer is a silicon dioxide layer with a physical film thickness of 228 nm and a refractive index of 1.46.

[0101] The third film layer is a titanium pentoxide layer with a physical film thickness of 155 nm and a refractive index of 2.1.

[0102] The fourth film layer is a silicon dioxide layer with a physical film thickness of 198 nm and a refractive index of 1.46.

[0103] The fifth film layer is a silicon dioxide layer with a physical film thickness of 85 nm and a refractive index of 1.46.

[0104] The reflectance spectrum curve for this comparison is shown below. Figure 8 .

[0105] Performance testing and comparison: The transparent optical lenses of the above embodiments and comparative examples, as well as commercially available lenses, were compared and tested. The results are shown in Table 1.

[0106] From the test results in Table 1 and Figures 2 to 8It can be seen that the dual-band reflective optical lenses of the various embodiments of the present invention are superior to the comparative examples and commercially available products in terms of blue light reflectivity, infrared reflectivity, and visible light transmittance. Specifically, the reflectivity of Examples 1-3 in the 385~445nm blue light band all reaches more than 20% (maximum 29%), the reflectivity in the 780~1400nm near-infrared band all reaches more than 40% (maximum 51%), and the reflectivity in the 500~780nm visible light band is less than 0.7% (corresponding to a transmittance of more than 99.3%), achieving synergistic optimization of harmful blue light protection, infrared thermal isolation, and high visible light transmittance.

[0107] In contrast, Comparative Examples 1-6 all failed to simultaneously meet the above three performance indicators: Comparative Examples 1-2 suffered from blue light reflectivity of less than 20% and infrared reflectivity of less than 25% due to the critical film thickness deviating from the design range; Comparative Examples 3-6 suffered from visible light reflectivity exceeding 1% (up to 2.07%) due to film structure (such as lack of a zirconium dioxide layer, insufficient number of film layers, or improper placement), and infrared reflectivity was generally below 40%, failing to effectively block near-infrared radiation. Commercially available products also have obvious defects: Anti-blue light lens A has a blue light reflectivity of 25.2%, but an infrared reflectivity of only 8.7%; Anti-infrared lens B has an infrared reflectivity of 42.8%, but a blue light reflectivity of only 5.3%; neither can achieve efficient dual-band protection in a single lens, and both have visible light transmittance lower than that of the embodiments of the present invention.

[0108] The applications of the dual-band reflective optical film system of this invention include, but are not limited to, the following: 1. High-end outdoor and professional sports fields: Used for professional sports glasses such as golf, skiing, and cycling, effectively blocking high-intensity infrared heat radiation, keeping the eyes cool, and improving visual contrast in strong light environments.

[0109] 2. Smart wearable and AR / VR display lenses: Meeting the stringent requirements of electronic display devices for light transmittance, while blocking blue light and external infrared rays from the screen, their ≥99% light transmittance ensures zero color distortion in virtual images.

[0110] 3. All-weather driving protective glasses: During the day, they effectively block direct infrared heat waves from outside the vehicle, while at night, their extremely high visible light transmittance ensures clear vision and reduces glare from oncoming headlights.

[0111] 4. Professional medical and high-end vision control lenses: Provide a safe physical barrier for patients after ophthalmic surgery (such as cataracts and macular degeneration); also suitable for children, e-sports players, and heavy office workers, providing professional broadband protection while achieving zero color difference and high-fidelity vision.

[0112] 5. Industrial and Special Protective Glasses: Suitable for industrial scenarios with high-intensity harmful light radiation, such as welding and high-temperature operations, providing efficient and long-lasting safety protection.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A dual-band reflective optical film system, characterized in that: It includes seven optical thin films, and the structure of each film layer is as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 140~150nm; The second film layer is a silicon dioxide layer with a physical film thickness of 280~290nm; The third film layer is a titanium pentoxide layer with a physical film thickness of 150~160nm; The fourth film layer is a silicon dioxide layer with a physical film thickness of 190~200nm; The fifth film layer is a zirconium dioxide layer with a physical film thickness of 35~40nm; The sixth film layer is a titanium pentoxide layer with a physical film thickness of 75~85nm; The seventh film layer is a silicon dioxide layer with a physical film thickness of 25~35nm; The reflectance of this film system is 20-35% in the 385-445nm blue light band, ≥40% in the 780-1400nm near-infrared light band, and ≤1% in the 500-780nm visible light band.

2. The dual-band reflective optical film system according to claim 1, characterized in that: The refractive index of the titanium pentoxide layer is 2.05~2.15; The refractive index of the silicon dioxide layer is 1.45~1.47; The refractive index of the zirconium dioxide layer is 1.83~1.

87.

3. The dual-band reflective optical film system according to claim 1, characterized in that, The structures of each membrane layer are as follows: The first film layer is a titanium pentoxide layer with a physical film thickness of 144 nm; The second film layer is a silicon dioxide layer with a physical film thickness of 288 nm. The third film layer is a titanium pentoxide layer with a physical film thickness of 154 nm; The fourth film layer is a silicon dioxide layer with a physical film thickness of 196 nm; The fifth film layer is a zirconium dioxide layer with a physical film thickness of 38 nm; The sixth film layer is a titanium pentoxide layer with a physical film thickness of 80 nm; The seventh film layer is a silicon dioxide layer with a physical film thickness of 30 nm; The reflectance of this film is 22% in the blue light band of 385~445nm, 42% in the near-infrared light band of 780~1400nm, and 0.49% in the visible light band of 500~780nm.

4. The dual-band reflective optical film system according to claim 1, characterized in that: The dual-band reflective optical film system is disposed on the convex surface of the lens substrate.

5. A dual-band reflective optical lens, characterized in that: The invention includes a lens substrate and a dual-band reflective optical film system as described in any one of claims 1 to 4, wherein the dual-band reflective optical film system is disposed on the convex surface of the lens substrate, the first film layer is close to the convex surface of the lens substrate, and the seventh film layer is away from the convex surface of the lens substrate.

6. The dual-band reflective optical lens according to claim 5, characterized in that: The lens substrate is made of polycarbonate material with a refractive index of 1.50~1.

60.

7. The dual-band reflective optical lens according to claim 6, characterized in that: The refractive index of the lens substrate is 1.

57.

8. The dual-band reflective optical lens according to claim 5, characterized in that: Used in the manufacture of myopia glasses, sunglasses, sports glasses, driving glasses, protective glasses, or electronic display goggles.

Images