Lens with ultrathin anti-ultraviolet high anti-reflection optical thin film

Abstract

The utility model discloses a lens with an ultrathin anti-ultraviolet high anti-reflection optical film. The lens comprises a lens base material and an anti-ultraviolet film composite layer, a bonding layer is arranged on the convex surface of the base material; an anti-ultraviolet film composite layer is arranged on the bonding layer, the anti-ultraviolet film composite layer is of an eight-layer structure formed by alternately overlapping trititanium pentoxide and silicon dioxide, the eight-layer structure is sequentially arranged from the concave surface of the base material to the convex surface of the base material, the first layer is 21.9 nm, the second layer is 23.88 nm, the third layer is 78.4 nm, the fourth layer is 28.17 nm, the fifth layer is 30.77 nm, the sixth layer is 61.53 nm, the seventh layer is 33.576 nm, and the eighth layer is 119.452 nm; and an oil-proof layer is arranged on the anti-ultraviolet film composite layer. The thin film is stable in optical performance, free of aging and yellowing phenomena, precise and controllable in preparation process, high in yield and short in period from design to production change, and economic benefits are greatly improved. The product can effectively block more than 95% of UVA waveband ultraviolet rays, the transmittance of light waves in other wavebands is up to 90%, and the product is particularly suitable for being made into correction lenses such as myopia lenses, hyperopia lenses and aged lenses.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to a lens structure with an ultra-thin anti-ultraviolet high-reflection optical film. Background Art

[0002] Ultraviolet rays refer to the general term for radiation with a wavelength of 100-400 nanometers in the spectrum. The wavelength of ultraviolet rays is divided into three bands, namely UVA, UVB and UVC. Among them, the wavelength of the UVA band is 320-400nm, which has a strong penetrating power. It can not only penetrate most transparent glass and plastics, but also penetrate the surface of the skin directly into the dermis, causing the skin to relax and accelerate aging, accelerate the formation of melanin, and is also an important cause of skin cancer. The wavelength of the UVB band is 290-320nm, and the wavelength of the UVC band is 100-290nm. The penetration of UVB and UVC is weak, and due to the existence of the ozone layer above the earth, UVB and UVC can hardly reach the surface of the earth after passing through the ozone layer. Therefore, anti-ultraviolet products are mainly for the protection of UVA, and anti-ultraviolet lenses are no exception.

[0003] Most of the anti-ultraviolet lenses on the market currently achieve various anti-ultraviolet effects by directly adding various UV powders to the lens material or by applying and leveling a UV powder coating on the lens surface. However, UV powder has a certain validity period and its optical performance is not stable enough. With the extension of usage time, its anti-ultraviolet performance will decay, and the product will age and yellow. In the process of lens product production, there is also a certain error in the uniformity of the UV powder of each lens, which directly affects the product yield, the user experience will deteriorate, and the optical performance is not very ideal.

[0004] Therefore, relying on the professional knowledge accumulated over a long period of time and the familiarity with coating technology and lens products, the inventor conducted in-depth research and a large number of experiments and tests, summarized the characteristics of the coating structure, and specially developed and designed a lens with an ultra-thin UV-resistant and highly anti-reflective optical film, which resulted in this case. Utility Model Content

[0005] The utility model aims to provide a lens with an ultra-thin anti-ultraviolet high-reflection optical film, which has stable optical performance, no aging and yellowing phenomenon, a precise and controllable preparation process, and a high yield rate.

[0006] In order to achieve the above purpose, the solution of the utility model is:

[0007] A lens with an ultra-thin anti-ultraviolet high-reflection optical film comprises a lens substrate and an anti-ultraviolet film composite layer; an adhesive layer is arranged on the convex surface of the lens substrate; an anti-ultraviolet film composite layer is arranged on the adhesive layer, the anti-ultraviolet film composite layer is an eight-layer structure formed by alternately stacking titanium pentoxide and silicon dioxide, the eight-layer structure is arranged in sequence from the concave surface to the convex surface of the substrate, the first layer is a 21.9nm titanium pentoxide film layer, the second layer is a 23.88nm silicon dioxide film layer, the third layer is a 78.4nm titanium pentoxide film layer, the fourth layer is a 28.17nm silicon dioxide film layer, the fifth layer is a 30.77nm titanium pentoxide film layer, the sixth layer is a 61.53nm silicon dioxide film layer, the seventh layer is a 33.576nm titanium pentoxide film layer, and the eighth layer is a 119.452nm silicon dioxide film layer; an oil-proof layer is arranged on the anti-ultraviolet film composite layer.

[0008] The lens substrate is a PC sheet or a nylon sheet.

[0009] The lens substrate is a colorless lens or a colored lens.

[0010] The lens is a non-polarized lens.

[0011] The lens is a polarized lens, that is, a polarizing layer is firstly arranged on the convex surface or concave surface of the lens substrate to form a polarized lens, and then an adhesive layer is arranged on the convex surface of the polarized lens.

[0012] The thickness of the adhesive layer is 3 nm.

[0013] The thickness of the oil-proof layer is 15 nm.

[0014] The lens is a myopia lens, a hyperopia lens, an aging lens or a sun lens.

[0015] After adopting the above structure, the anti-ultraviolet film composite layer of the utility model can be plated by vacuum coating technology, and is obtained by physical vapor deposition of optical film on the surface of the lens substrate using vacuum equipment. The optical performance of the film formed in this way is stable, there is no aging and yellowing phenomenon, the preparation process is precisely controllable, the yield rate is high, and the cycle from design to conversion is short, which greatly improves the economic benefits. The total thickness of the anti-ultraviolet film composite layer of the utility model is less than 400nm. Because it is an ultra-thin optical film layer, there is a great saving in the use of coating materials. 25kg of materials can be saved in the daily production cycle, which indirectly plays a good role in environmental protection and carbon saving and emission reduction. The physical thickness or optical thickness of each layer of film is strictly controlled, so that the overall lens product is ultra-thin and lightweight, and the interference and diffraction phenomenon generated by light passing through materials with different refractive indices is utilized. Because vacuum physical vapor deposition equipment is used, automated coating production can be realized, reducing labor hours, and digital and automated production lines can be introduced to produce such products, providing technical guarantees for manufacturers to generate revenue. The product of the utility model can effectively block more than 95% of UVA band (320-400nm) ultraviolet rays, and the transmittance of light waves in other bands is as high as 90%. It is particularly suitable for making corrective lenses such as myopia lenses, hyperopia lenses and aging lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the examples of the utility model, the following is a brief description of the drawings required for the description of the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of

[0019] Figure 3 It is a spectral transmittance curve diagram of the utility model.

[0020] Description of symbols

[0021] Substrate 1;

[0022] Anti-ultraviolet film composite layer 2: first layer 21, second layer 22, third layer 23, fourth layer 24, fifth layer 25, sixth layer 26, seventh layer 27, eighth layer 28;

[0023] Adhesive layer 3;

[0024] Oil-proof layer 4. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] It should be noted that the terms up, down, left, right, inside, outside, first, second, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features, unless otherwise clearly and specifically defined.

[0027] like Figures 1 to 3 As shown, the utility model discloses a lens with an ultra-thin anti-ultraviolet high-reflection optical film, comprising a lens substrate 1 and an anti-ultraviolet film composite layer 2.

[0028] The lens substrate 1 may be a PC sheet or a nylon sheet. The lens substrate 1 may be a colorless sheet formed by injection molding, or may be a colored sheet of various colors by adding color powder during injection molding to increase the beauty of the product and meet the needs of different consumers.

[0029] The convex surface of the lens substrate 1 is provided with an adhesive layer 3, which can firmly bond the anti-ultraviolet film composite layer 2 described later to the lens. The preferred thickness of the adhesive layer 3 is 3 nm.

[0030] An anti-ultraviolet film composite layer 2 is disposed on the adhesive layer 3. The anti-ultraviolet film composite layer 2 is an eight-layer structure formed by alternately stacking titanium pentoxide and silicon dioxide, and the eight-layer structure is arranged in sequence from the concave surface to the convex surface of the substrate 1, the first layer 21 is a 21.9nm titanium pentoxide film layer, the second layer 22 is a 23.88nm silicon dioxide film layer, the third layer 23 is a 78.4nm titanium pentoxide film layer, the fourth layer 24 is a 28.17nm silicon dioxide film layer, the fifth layer 25 is a 30.77nm titanium pentoxide film layer, the sixth layer 26 is a 61.53nm silicon dioxide film layer, the seventh layer 27 is a 33.576nm titanium pentoxide film layer, and the eighth layer 28 is a 119.452nm silicon dioxide film layer.

[0031] An oil-proof layer 4 is disposed on the anti-ultraviolet film composite layer 2 to protect the anti-ultraviolet film composite layer 2 and prevent fingerprints from contaminating the lens surface. The preferred thickness of the oil-proof layer 4 is 15 nm.

[0032] When the utility model is processed, the specific process steps are as follows.

[0033] The first step is to make the substrate 1: dry the PC or nylon material, and then use an injection molding machine to injection mold the PC or nylon material to make the lens substrate 1. The lens in this step can be made into myopia lenses, hyperopia lenses, aging lenses or sun lenses according to the specific needs of the product. During the injection molding of this step, color powder can be added to the raw materials to make the lens substrate 1 a colored lens, thereby increasing the aesthetics and diversity of the product. If you want to get a lens with polarization function, when making the substrate 1, you can add a polarizing film to the injection molding machine, so that a polarizing layer is directly set on the injection molded substrate 1. Specifically, a polarizing film can be first set on the convex or concave surface of the lens substrate 1, and the substrate 1 is directly combined with the polarizing film during injection molding to form a polarized lens.

[0034] Step 2: Preparation of adhesive layer 3: A layer of adhesive layer 3 is formed on the lens substrate 1 by coating, and the thickness of the adhesive layer 3 is controlled to be 3 nm. The adhesive layer 3 can firmly bond the anti-ultraviolet film composite layer 2 described later to the lens.

[0035] The third step is to prepare the anti-ultraviolet film composite layer 2: a layer of anti-ultraviolet film composite layer 2 is processed on the adhesive layer 3 by vacuum coating technology. The vacuum coating technology is a physical vapor deposition technology implemented by a vacuum coating machine. It mainly uses a multi-stage vacuum pumping system to pump the vacuum cavity to a certain vacuum degree, and uses an electron gun device to sublimate the material to be coated into a gaseous state, so that it adheres to the surface of the lens. In this process, the physical thickness or optical thickness of each layer of film must be controlled. The anti-ultraviolet film composite layer 2 is realized by optical film design technology. The main principle is to calculate and design the film thickness by using the interference and diffraction phenomenon caused by light passing through materials with different refractive indices. Specifically, the anti-ultraviolet film composite layer 2 is an eight-layer structure formed by alternating superposition of titanium pentoxide and silicon dioxide, and the eight-layer structure is arranged in sequence from the concave surface to the convex surface of the substrate 1, the first layer 21 is a 21.9nm titanium pentoxide film layer, the second layer 22 is a 23.88nm silicon dioxide film layer, the third layer 23 is a 78.4nm titanium pentoxide film layer, the fourth layer 24 is a 28.17nm silicon dioxide film layer, the fifth layer 25 is a 30.77nm titanium pentoxide film layer, the sixth layer 26 is a 61.53nm silicon dioxide film layer, the seventh layer 27 is a 33.576nm titanium pentoxide film layer, and the eighth layer 28 is a 119.452nm silicon dioxide film layer. In this way, the specially designed multi-layer coating is used to achieve the permanent anti-ultraviolet function of the lens. Moreover, the optical properties of the coating layer are stable, without any aging or yellowing phenomenon, the preparation process is precisely controllable, the yield rate is high, and the cycle from design to production conversion is short, which greatly improves the economic benefits.

[0036] Step 4: Preparation of oil-proof layer 4: A layer of oil-proof layer 4 is formed on the anti-ultraviolet film composite layer 2 by coating, and the thickness of the oil-proof layer 4 is controlled to be 15 nm. The oil-proof layer 4 can protect the anti-ultraviolet film composite layer 2 and prevent fingerprints and the like from contaminating the lens surface.

[0037] The test results of the product of the utility model show that the transmittance of ultraviolet rays in the range of 320 to 400 nm (UVA band) is less than 5%, while the transmittance of light waves in other bands is as high as 90%. The product has high transmittance and the vision is clear when worn. The product complies with Australian, European and American standards, and objects can be observed clearly. The product is particularly suitable for making corrective lenses such as myopia lenses, hyperopia lenses and aging lenses.

[0038] The above is only an example of the implementation of the utility model, and is not intended to limit the protection scope of the utility model. It should be pointed out that equivalent changes made by technicians in this field according to the design ideas of this case after reading this specification all fall within the protection scope of this case.

Claims

1. A lens having an ultra-thin UV-resistant high-reflection optical film, characterized in that: It comprises a lens substrate and an anti-ultraviolet film composite layer; an adhesive layer is arranged on the convex surface of the lens substrate; an anti-ultraviolet film composite layer is arranged on the adhesive layer, the anti-ultraviolet film composite layer is an eight-layer structure formed by alternating superposition of titanium pentoxide and silicon dioxide, the eight-layer structure is arranged in sequence from the concave surface to the convex surface of the substrate, the first layer is a 21.9nm titanium pentoxide film layer, the second layer is a 23.88nm silicon dioxide film layer, the third layer is a 78.4nm titanium pentoxide film layer, the fourth layer is a 28.17nm silicon dioxide film layer, the fifth layer is a 30.77nm titanium pentoxide film layer, the sixth layer is a 61.53nm silicon dioxide film layer, the seventh layer is a 33.576nm titanium pentoxide film layer, and the eighth layer is a 119.452nm silicon dioxide film layer; an oil-proof layer is arranged on the anti-ultraviolet film composite layer.

2. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The lens substrate is a PC sheet or a nylon sheet.

3. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The lens substrate is a colorless lens or a colored lens.

4. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The lens is a non-polarized lens.

5. The lens with ultra-thin UV-resistant high-reflection optical film as claimed in claim 1, characterized in that: The lens is a polarized lens, that is, a polarizing layer is firstly arranged on the convex surface or concave surface of the lens substrate to form a polarized lens, and then an adhesive layer is arranged on the convex surface of the polarized lens.

6. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The thickness of the adhesive layer is 3 nm.

7. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The thickness of the oil-proof layer is 15 nm.

8. The lens with ultra-thin anti-ultraviolet high anti-reflection optical film as claimed in claim 1, characterized in that: The lens is a myopia lens, a hyperopia lens, an aging lens or a sun lens.

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