An optical lens resistant to infrared and ultraviolet rays and a method for manufacturing the same

Abstract

The application provides an optical lens resistant to infrared rays and ultraviolet rays, comprising a substrate, an antireflection layer arranged on the surface of the substrate, an infrared ray absorption layer arranged on the surface of the antireflection layer, wherein the infrared ray absorption layer comprises a first infrared ray absorption layer and a second infrared ray absorption layer arranged adjacently, a closed flat cavity is formed between the first infrared ray absorption layer and the second infrared ray absorption layer, an ultraviolet ray absorption layer is arranged in the cavity, and a hardening layer is arranged on the surface of the infrared ray absorption layer. The application further provides a preparation method of the optical lens resistant to infrared rays and ultraviolet rays. In the application, the ultraviolet ray absorption layer is bound and limited by the cavity formed by the infrared ray absorption layer, and will not be deformed, displaced or damaged due to softening. The application improves the ultraviolet ray absorption capacity, reduces the number of coating layers, and correspondingly improves the problem of the affected light transmittance.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and in particular to an optical lens that resists infrared and ultraviolet rays and its preparation method. Background Technology

[0002] As the eyewear market expands, lenses are receiving increasing attention from consumers. Consequently, with the diversification of consumer demands, lens performance and manufacturing processes are constantly being improved and refined. Currently, coated lenses on the market primarily utilize vacuum coating methods to apply anti-reflective coatings and top waterproof layers to already hardened lenses. This enhances transmittance and protects the lens. Various types of lenses serve as everyday carry items, providing functions such as vision correction, protection, and style.

[0003] However, ordinary lenses are made of simple materials and have a relatively simple structure, offering little protection against the absorption and reflection of infrared and ultraviolet rays. Prolonged wear can damage the eyes. Recent studies have shown that infrared and ultraviolet rays can harm the eyes. For example, infrared rays can damage the retina, and prolonged exposure can cause cataracts. Ultraviolet rays can not only cause cataracts but also keratitis, retinal damage, cataracts, macular degeneration, snow blindness, and other serious eye diseases. Therefore, people expect glasses to not only protect and correct vision but also prevent eye damage. This has led to the emergence of lenses with various functions, including infrared protection, ultraviolet protection, and blue light protection.

[0004] With technological advancements, most eyeglasses now offer some degree of infrared or ultraviolet (UV) blocking capabilities. This is typically achieved by forming thin films on the lens body to block UV and infrared rays, respectively. To enhance protection, multiple layers are often used, as exemplified by the infrared-blocking, blue-light-blocking, and UV-blocking lens and its manufacturing method described in Chinese invention patent CN109655943A, which employs more than six layers. However, this method, while blocking both infrared and UV rays, also reduces visible light transmittance, which is detrimental to vision correction and protection. Meanwhile, current UV protection layers typically use organic materials with UVA absorption properties. These materials usually have low melting points and cannot be used directly as coatings. Therefore, they need to be formulated as polymers to increase their melting point and prevent damage from environmental temperatures during daily use. However, polymer formulation reduces UV absorption capacity, and the resulting polymers often have a certain color, further affecting light transmittance. Therefore, a better optical lens that protects against both infrared and UV rays is needed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an infrared and ultraviolet resistant optical lens and its preparation method. It solves the problems in existing technologies where excessive coating layers affect light transmittance, and where organic films used as ultraviolet protection layers, due to their low melting points, need to be prepared as polymers, thus reducing their absorption capacity.

[0006] According to an embodiment of the present invention, an optical lens resistant to infrared and ultraviolet rays includes:

[0007] substrate;

[0008] An antireflective layer disposed on the surface of the substrate;

[0009] An infrared absorption layer is disposed on the surface of the antireflective layer. The infrared absorption layer includes a first infrared absorption layer and a second infrared absorption layer disposed adjacent to each other, and a closed flat cavity is formed between the first infrared absorption layer and the second infrared absorption layer.

[0010] An ultraviolet absorption layer disposed inside the cavity;

[0011] A hardened layer is set on the surface of the infrared absorption layer.

[0012] Furthermore, the substrate is a glass lens or a lens made of polymer resin material.

[0013] Furthermore, the antireflective layer is made of titanium dioxide, and its thickness is 40-60 nm.

[0014] Furthermore, the first infrared absorption layer and the second infrared absorption layer have a symmetrical structure, with concave portions on their opposite surfaces, so that when they are joined together by the edge connection portion, they form a closed cavity.

[0015] Furthermore, the thickness of the first infrared absorption layer and the second infrared absorption layer corresponding to the concave portion is 400-650 nm, and the thickness of the corresponding edge connection portion is 750-950 nm.

[0016] Furthermore, the materials of the first infrared absorption layer and the second infrared absorption layer include one of titanium pentoxide and aluminum oxide.

[0017] Furthermore, the material of the ultraviolet absorption layer includes 70-75 parts of triazine UVA and 25-30 parts of film-forming agent; the triazine UVA includes one or a mixture of two of hydroxyphenyl triazine and hydroxyethyl hexahydrotriazine, and the film-forming agent includes fluorocarbon resin emulsion.

[0018] Furthermore, the thickness of the ultraviolet absorbing layer is 140-220 nm.

[0019] Furthermore, the hardening layer includes a hard layer and a protective layer, wherein the hard layer is zirconium dioxide with a thickness of 50-65 nm, and the protective layer is silicon dioxide with a thickness of 40-80 nm.

[0020] This invention also proposes a method for preparing the above-mentioned infrared and ultraviolet resistant optical lens, comprising the following steps:

[0021] S1. Add triazine UVA and film-forming agent to a mixing tank according to the ratio, stir at 60-85℃ for 20-30 minutes, and then prepare it as a UV absorption layer.

[0022] S2. After cleaning the substrate, place it on the coating support and send it into the vacuum coating chamber.

[0023] S3. In an environment of 102-115℃ and vacuum degree of -4 to -2pa, an anti-reflection layer and a first infrared absorption layer are sequentially deposited on the surface of the substrate. Then, the temperature is lowered to 55-60℃ and an ultraviolet absorption layer is deposited. Subsequently, the temperature is rapidly raised to 102-115℃ and a second infrared absorption layer and a hardening layer are deposited.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In this invention, the coating on the substrate surface includes an antireflection layer, an infrared absorption layer, an ultraviolet absorption layer, and a hardening layer arranged sequentially. Simultaneously, the infrared absorption layer includes a first infrared absorption layer and a second infrared absorption layer symmetrically arranged, with a recessed cavity between them. The ultraviolet absorption layer is enclosed within this cavity. Therefore, the ultraviolet absorption layer is bound and restricted by the cavity formed by the infrared absorption layer, preventing deformation, displacement, or other damage due to softening. In existing technologies, if a low-melting-point non-polymeric organic material is used to prepare the ultraviolet absorption layer, it softens at higher temperatures, leading to displacement and damage to the overall coating structure. This invention, however, uses a cavity structure to seal the ultraviolet absorption layer internally. Even if it softens due to temperature, it cannot deform or move due to the restriction of the externally enclosed first and second infrared absorption layers, thus maintaining a stable shape. This not only preserves its own ultraviolet absorption capacity but also does not affect the stability of the entire film. Furthermore, this invention allows the use of high-purity ultraviolet-absorbing organic materials without increasing their melting point through polymerization, thereby significantly improving their ultraviolet absorption capacity. In addition, by using high-concentration UV-absorbing organic compounds, there is no need to use multiple layers of coating to improve the absorption effect, thus reducing the number of coating layers and improving the problem of light transmittance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0027] In the above figures: 1. Substrate; 2. Antireflective layer; 3. Infrared absorption layer; 4. Ultraviolet absorption layer; 5. Hardening layer; 31. First infrared absorption layer; 32. Second infrared absorption layer. Detailed Implementation

[0028] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1:

[0030] like Figure 1 As shown, this embodiment of the invention proposes an optical lens that resists infrared and ultraviolet rays, comprising:

[0031] Substrate 1; Antireflective layer 2 disposed on the surface of substrate 1; Infrared absorption layer 3 disposed on the surface of antireflective layer 2, the infrared absorption layer 3 including a first infrared absorption layer 31 and a second infrared absorption layer 323 disposed adjacently, the first infrared absorption layer 3 and the second infrared absorption layer 323 surrounding each other to form a closed flat cavity, in this embodiment the first infrared absorption layer 3 and the second infrared absorption layer 323 are symmetrical structures, and the opposite surfaces of the two are respectively provided with concave portions, so that when the two are enclosed by the edge connecting portion, a closed cavity is formed; Ultraviolet absorption layer 4 disposed inside the cavity; Hardening layer 5 disposed on the surface of infrared absorption layer 3.

[0032] In this embodiment, the substrate 1 is a glass lens.

[0033] The antireflective layer 2 is made of titanium dioxide and has a thickness of 40 nm.

[0034] The thickness of the first infrared absorption layer 3 and the second infrared absorption layer 323 corresponding to the concave portion is 400 nm, and the thickness of the corresponding edge connection portion is 750 nm. The first infrared absorption layer and the second infrared absorption layer 323 are made of titanium pentoxide.

[0035] The ultraviolet absorbing layer 4 is made of a triazine-based UVA (70 parts) and a film-forming agent (30 parts); the triazine-based UVA is hydroxyphenyl triazine, and the film-forming agent is a fluorocarbon resin emulsion. The thickness of the ultraviolet absorbing layer 4 is 140 nm.

[0036] The hardened layer 5 includes a hard layer and a protective layer. The hard layer is zirconium dioxide with a thickness of 50 nm, and the protective layer is silicon dioxide with a thickness of 40 nm.

[0037] In this embodiment, the method for preparing the optical lens includes the following steps:

[0038] S1. Add triazine UVA and film-forming agent to the mixing tank according to the ratio, stir at 60°C for 30 minutes, and then prepare it as UV absorption layer 4.

[0039] S2. After cleaning the substrate 1, place it on the coating support and send it into the vacuum coating chamber.

[0040] S3. In an environment of 102℃ and vacuum degree -4pa, an antireflection layer 2 and a first infrared absorption layer 3 are sequentially deposited on the surface of substrate 1. Then, the temperature is lowered to 55℃ and an ultraviolet absorption layer 4 is deposited. Subsequently, the temperature is rapidly raised to 102℃ and a second infrared absorption layer 323 and a hardening layer 5 are deposited.

[0041] Example 2:

[0042] like Figure 1 As shown, this embodiment of the invention proposes an optical lens that resists infrared and ultraviolet rays, comprising:

[0043] Substrate 1; Antireflective layer 2 disposed on the surface of substrate 1; Infrared absorption layer 3 disposed on the surface of antireflective layer 2, the infrared absorption layer 3 comprising a first infrared absorption layer 31 and a second infrared absorption layer 323 disposed adjacently, the first infrared absorption layer 3 and the second infrared absorption layer 323 surrounding each other to form a closed flat cavity; the first infrared absorption layer 3 and the second infrared absorption layer 323 have a symmetrical structure, and their opposite surfaces are respectively provided with concave portions, so that when the two are closed together by the edge connection portion, they form a closed cavity. Ultraviolet absorption layer 4 disposed inside the cavity; Hardening layer 5 disposed on the surface of infrared absorption layer 3.

[0044] In this embodiment, the substrate 1 is a lens made of polymer resin material.

[0045] The antireflective layer 2 is made of titanium dioxide and has a thickness of 50 nm.

[0046] The thickness of the first infrared absorption layer 3 and the second infrared absorption layer 323 corresponding to the concave portion is 500 nm, and the thickness of the corresponding edge connecting portion is 850 nm. The first infrared absorption layer and the second infrared absorption layer 323 are made of aluminum oxide.

[0047] The ultraviolet absorbing layer 4 is made of a triazine-based UVA (73 parts) and a film-forming agent (27 parts); the triazine-based UVA is hydroxyethyl hexahydrotriazine, and the film-forming agent includes a fluorocarbon resin emulsion. The thickness of the ultraviolet absorbing layer 4 is 180 nm.

[0048] The hardened layer 5 includes a hard layer and a protective layer. The hard layer is zirconium dioxide with a thickness of 60 nm, and the protective layer is silicon dioxide with a thickness of 60 nm.

[0049] In this embodiment, the method for preparing the optical lens includes the following steps:

[0050] S1. Add triazine UVA and film-forming agent to the mixing tank according to the ratio, stir at 70°C for 25 minutes, and then prepare it as UV absorption layer 4.

[0051] S2. After cleaning the substrate 1, place it on the coating support and send it into the vacuum coating chamber.

[0052] S3. In an environment of 108°C and vacuum degree -3pa, an antireflection layer 2 and a first infrared absorption layer 3 are sequentially deposited on the surface of substrate 1. Then, the temperature is lowered to 58°C and an ultraviolet absorption layer 4 is deposited. Subsequently, the temperature is rapidly raised to 108°C and a second infrared absorption layer 323 and a hardening layer 5 are deposited.

[0053] Example 3:

[0054] like Figure 1 As shown, this embodiment of the invention proposes an optical lens that resists infrared and ultraviolet rays, comprising:

[0055] Substrate 1; Antireflective layer 2 disposed on the surface of substrate 1; Infrared absorption layer 3 disposed on the surface of antireflective layer 2, the infrared absorption layer 3 comprising a first infrared absorption layer 31 and a second infrared absorption layer 323 disposed adjacently, the first infrared absorption layer 3 and the second infrared absorption layer 323 surrounding each other to form a closed flat cavity; the first infrared absorption layer 3 and the second infrared absorption layer 323 have a symmetrical structure, and their opposite surfaces are respectively provided with concave portions, so that when the two are closed together by the edge connection portion, they form a closed cavity. Ultraviolet absorption layer 4 disposed inside the cavity; Hardening layer 5 disposed on the surface of infrared absorption layer 3.

[0056] In this embodiment, the substrate 1 is a lens made of polymer resin material.

[0057] The antireflective layer 2 is made of titanium dioxide and has a thickness of 60 nm.

[0058] The thickness of the first infrared absorption layer 3 and the second infrared absorption layer 323 corresponding to the concave portion is 650 nm, and the thickness of the corresponding edge connection portion is 950 nm. The first infrared absorption layer and the second infrared absorption layer 323 are made of titanium pentoxide.

[0059] The ultraviolet absorbing layer 4 is made of 75 parts triazine-based UVA and 25 parts film-forming agent; the triazine-based UVA is a mixture of hydroxyphenyl triazine and hydroxyethyl hexahydrotriazine in equal proportions, and the film-forming agent includes a fluorocarbon resin emulsion. The thickness of the ultraviolet absorbing layer 4 is 220 nm.

[0060] The hardened layer 5 includes a hard layer and a protective layer. The hard layer is zirconium dioxide with a thickness of 65 nm, and the protective layer is silicon dioxide with a thickness of 80 nm.

[0061] In this embodiment, the method for preparing the optical lens includes the following steps:

[0062] S1. Add triazine UVA and film-forming agent to a mixing tank according to the ratio, stir at 85°C for 20 minutes, and then prepare it as UV absorption layer 4.

[0063] S2. After cleaning the substrate 1, place it on the coating support and send it into the vacuum coating chamber.

[0064] S3. In an environment of 115℃ and vacuum degree -2pa, an antireflection layer 2 and a first infrared absorption layer 3 are sequentially deposited on the surface of substrate 1. Then, the temperature is lowered to 60℃ and an ultraviolet absorption layer 4 is deposited. Subsequently, the temperature is rapidly raised to 115℃ and a second infrared absorption layer 323 and a hardening layer 5 are deposited.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An optical lens that resists infrared and ultraviolet rays, characterized in that, include: substrate; An antireflective layer disposed on the surface of the substrate; An infrared absorption layer is disposed on the surface of the antireflective layer. The infrared absorption layer includes a first infrared absorption layer and a second infrared absorption layer disposed adjacent to each other, and a closed flat cavity is formed between the first infrared absorption layer and the second infrared absorption layer. An ultraviolet absorption layer disposed inside the cavity; A hardened layer is set on the surface of the infrared absorption layer; The first infrared absorption layer and the second infrared absorption layer have a symmetrical structure, and the opposite surfaces of the two are respectively provided with concave portions, so that when the two are enclosed by the edge connection portion, they form a closed cavity. The thickness of the first infrared absorption layer and the second infrared absorption layer corresponding to the concave portion is 400-650nm, and the thickness of the corresponding edge connection portion is 750-950nm. The materials of the first infrared absorption layer and the second infrared absorption layer include one of titanium pentoxide and aluminum oxide; The material of the ultraviolet absorption layer includes 70-75 parts of triazine UVA and 25-30 parts of film-forming agent; the triazine UVA includes one or a mixture of two of hydroxyphenyl triazine and hydroxyethyl hexahydrotriazine, and the film-forming agent includes fluorocarbon resin emulsion.

2. The optical lens for resisting infrared and ultraviolet rays as described in claim 1, characterized in that: The substrate is a glass lens or a lens made of polymer resin material.

3. The optical lens for resisting infrared and ultraviolet rays as described in claim 1, characterized in that: The antireflective layer is made of titanium dioxide and has a thickness of 40-60 nm.

4. The optical lens for resisting infrared and ultraviolet rays as described in claim 1, characterized in that: The thickness of the ultraviolet absorption layer is 140-220 nm.

5. The optical lens for resisting infrared and ultraviolet rays as described in claim 1, characterized in that: The hardened layer comprises a hard layer and a protective layer. The hard layer is zirconium dioxide with a thickness of 50-65 nm, and the protective layer is silicon dioxide with a thickness of 40-80 nm.

6. A method for preparing an infrared and ultraviolet resistant optical lens as described in any one of claims 1-5, Its features are, Includes the following steps: S1. Add the triazine UVA and film-forming agent to the mixing tank according to the specified ratio, stir at 60-85℃ for 20-30 minutes, and then use as... Preparation of ultraviolet absorption layer materials; S2. After cleaning the substrate, place it on the coating support and send it into the vacuum coating chamber. S3. In an environment of 102-115℃ and vacuum degree of -4 to -2pa, an anti-reflection layer and a first infrared absorption layer are sequentially deposited on the surface of the substrate. Then, the temperature is lowered to 55-60℃ and an ultraviolet absorption layer is deposited. Subsequently, the temperature is rapidly raised to 102-115℃ and a second infrared absorption layer and a hardening layer are deposited.

Images