Coating photochromic lens

Abstract

The utility model relates to a coating photochromic lens. The technical problem that an existing lens made of an acrylic base material cannot meet the strength requirement of a pressure test is solved. The coating photochromic lens comprises a lens base material with a convex surface and a concave surface, the outer sides of the convex surface and the concave surface of the lens base material are respectively and sequentially provided with an anti-blue-light layer, an anti-static layer, a tough layer, a hardening layer and a coating layer from inside to outside, and a photochromic layer is arranged between the anti-blue-light layer and the anti-static layer on the outer side of the convex surface of the lens base material. The coating photochromic lens has the advantages that a conventional protective layer is omitted, the anti-blue-light layer, the anti-static layer and the tough layer are added, the tough layer not only plays a role of the protective layer, but also brings good impact resistance and compressive strength to the lens, and meanwhile, the anti-blue-light layer and the anti-static layer increase the anti-blue-light performance and the anti-static performance of the lens, so that the service life of the lens is prolonged. And the processing technology of the coated lens is simplified.

Description

Technical Field

[0001] This utility model belongs to the technical field of resin photochromic lenses, specifically relating to a coated photochromic lens. Background Technology

[0002] Traditional photochromic lenses typically employ a two-layer design: a bottom layer for photochromic adjustment and a top layer for protection. The photochromic layer is uniformly applied to the lens surface using a spin-coating process, while the protective layer primarily functions during the lens hardening and cleaning process, preventing corrosion of the photochromic layer by alkaline solutions and cleaning agents. However, with increasing emphasis on eyewear safety and rising standards for lens performance, the coating system faces greater challenges. For resin lenses, manufactured lenses undergo pressure testing, where pressure is applied to the center of the lens. The lens must remain undeformed, unbroken, and unperforated for a certain period. However, current technology fails to meet the pressure test strength requirements for acrylic-based lenses, including conventional acrylic lenses with refractive indices of 1.499 and 1.56, as well as photochromic lenses using these substrates. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a coated photochromic lens.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a coated photochromic lens, comprising a lens substrate having a convex surface and a concave surface, wherein an anti-blue light layer, an antistatic layer, a toughness layer, a hardening layer and a coating layer are respectively provided on the outer sides of the convex and concave surfaces of the lens substrate from the inside out, and a photochromic layer is provided between the anti-blue light layer and the antistatic layer on the outer side of the convex surface of the lens substrate.

[0005] In the aforementioned photochromic lens with coating, the lens substrate is an acrylic substrate. Acrylic substrate has advantages such as good light transmission, light weight, and strong impact resistance. Therefore, this lens can ensure good light transmission while being lighter, more durable, and improving wearing comfort and safety.

[0006] In the aforementioned photochromic lens coating, the anti-blue light layer is formed by dip coating. The dip coating process ensures a uniform coating coverage of the lens surface, guaranteeing the stability and consistency of the anti-blue light effect, making the lens more reliable in blocking blue light, and effectively protecting the eyes from blue light damage.

[0007] In the aforementioned type of photochromic lens, the photochromic layer is formed by spin coating. Spin coating allows for precise control of the coating thickness, ensuring stable performance of the photochromic layer and resulting in a uniform photochromic effect.

[0008] In the aforementioned photochromic lens coating, the thickness of the photochromic layer is 10.0-20.0 micrometers. This thickness range ensures an appropriate content of photochromic material, allowing the lens to change color quickly and uniformly under different lighting conditions, adapting to changes in ambient light and providing the wearer with a comfortable visual experience.

[0009] In the aforementioned photochromic lens coating, the antistatic layer and the toughness layer are formed by dip coating. Utilizing the advantages of the dip coating process, both layers are evenly covered. The antistatic layer effectively reduces static electricity that attracts dust to the lens surface, keeping the lens clean, while the toughness layer enhances the lens's resistance to bending, improving its durability.

[0010] In the aforementioned photochromic lens coating, the toughness layer has a thickness of 3.0-5.0 micrometers. This thickness provides sufficient toughness support to enhance impact resistance without excessively increasing lens weight, thus balancing robustness and lightness. The toughness layer utilizes either SDC Technologies' PR-840 or DON OPTICS CO.,LTD.'s VP-60PRIMER.

[0011] In the aforementioned photochromic lens coating, the thickness of the hardening layer is 2.0-4.0 micrometers. This suitable thickness of 2.0-4.0 micrometers increases the surface hardness of the lens, effectively resisting scratches and wear, extending the lens's lifespan, and reducing damage during daily use.

[0012] In the aforementioned photochromic lens coating, the coating layer comprises 7-11 layers of metal oxide or fluoride coatings with different refractive indices. This combination of multiple coatings with varying refractive indices effectively adjusts the lens's optical properties, such as light transmittance and reflectivity, thereby improving lens clarity and reducing interference from reflections.

[0013] In the aforementioned photochromic lens with a coating, the coating layer is formed by vacuum coating, and the total thickness of the coating layer is 300-500 nanometers. The vacuum environment can prevent the coating from being contaminated, ensuring the purity and uniformity of the coating layer. The reasonable thickness range of 300-500 nanometers ensures the stability of the optical performance of the coating layer, further optimizing the overall optical effect of the lens.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] This coated photochromic lens eliminates the conventional protective layer and adds an anti-blue light layer, an anti-static layer, and a toughness layer. The toughness layer not only serves as a protective layer but also provides the lens with good impact resistance and compressive strength. Meanwhile, the anti-blue light layer and the anti-static layer enhance the lens's anti-blue light and anti-static properties and simplify the processing technology of the coated lens. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a structural cross-sectional view of the present invention.

[0018] Figure 3 This utility model Figure 2 Enlarged view of the structure at point A in the middle.

[0019] In the diagram: lens substrate 1, convex surface 11, concave surface 12, anti-blue light layer 3, anti-static layer 4, toughness layer 5, hardening layer 6, coating layer 7, photochromic layer 8. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-3 As shown, a coated photochromic lens includes a lens substrate 1 having a convex surface 11 and a concave surface 12. The outer sides of the convex surface 11 and the concave surface 12 of the lens substrate 1 are respectively provided with an anti-blue light layer 3, an anti-static layer 4, a toughness layer 5, a hardening layer 6 and a coating layer 7 from the inside to the outside. A photochromic layer 8 is provided between the anti-blue light layer 3 and the anti-static layer 4 on the outer side of the convex surface 11 of the lens substrate 1.

[0022] Among them, lens substrate 1 is an acrylic substrate. Acrylic substrate 1 has the characteristics of good light transmission, light weight, and strong impact resistance. Therefore, the lens can be lighter and more durable while ensuring good light transmission, thus improving wearing comfort and safety.

[0023] Specifically, the anti-blue light layer 3 is formed by dip coating. The dip coating process ensures that the coating evenly covers the lens surface, ensuring the stability and consistency of the anti-blue light effect, making the lens more reliable in blocking blue light, and effectively protecting the eyes from blue light damage.

[0024] Furthermore, the photochromic layer 8 is formed by spin coating. The spin coating process can precisely control the coating thickness, ensuring the stability of the photochromic layer and making the lens photochromic effect uniform.

[0025] Furthermore, the thickness of the photochromic layer 8 is 10.0-20.0 micrometers. This thickness range ensures an appropriate amount of photochromic material, allowing the lens to change color quickly and evenly under different lighting conditions, adapting to changes in ambient light and providing the wearer with a comfortable visual experience.

[0026] Meanwhile, the antistatic layer 4 and the toughness layer 5 are formed by dip coating. Utilizing the advantages of the dip coating process, the two layers are evenly covered. The antistatic layer effectively reduces the static electricity that attracts dust to the lens surface, keeping the lens clean, while the toughness layer enhances the lens's resistance to bending and improves its durability.

[0027] Clearly, the toughness layer 5 has a thickness of 3.0-5.0 micrometers. The thickness of the toughness layer 5, at 3.0-5.0 micrometers, provides sufficient toughness support to the lens, enhancing its impact resistance, without excessively increasing its weight, thus balancing the lens's strength and lightness. Furthermore, the toughness layer 5 uses either SDC Technologies' PR-840 or DON OPTICS CO.,LTD.'s VP-60PRIMER.

[0028] Specifically, the thickness of the hardening layer 6 is 2.0-4.0 micrometers. The appropriate thickness of the hardening layer 6 (2.0-4.0 micrometers) increases the surface hardness of the lens, effectively resisting scratches and wear, extending the lens's lifespan, and reducing damage during daily use.

[0029] Specifically, coating layer 7 consists of 7-11 layers of metal oxide or fluoride coatings with different refractive indices. The combination of multiple coatings with different refractive indices can effectively adjust the optical properties of the lens, such as light transmittance and reflectivity, thereby improving the lens's clarity and reducing interference such as reflections.

[0030] In addition, the coating layer 7 is formed by vacuum coating, and the total thickness of the coating layer 7 is 300-500 nanometers. The vacuum environment can avoid contamination of the coating, ensuring the purity and uniformity of the coating, and the reasonable thickness range of 300-500 nanometers ensures the stability of the optical performance of the coating layer 7, further optimizing the overall optical effect of the lens.

[0031] The principle of this embodiment is as follows:

[0032] At the start of lens processing, an anti-blue light liquid is first applied to both sides of the lens substrate 1 using a dip-coating process. After heating and curing, an anti-blue light layer 3 is formed. Then, a photochromic liquid is applied to the convex surface 11 of the lens substrate 1 using a spin-coating process. The substrate is then sent into an oven for heating. The solvent in the photochromic liquid evaporates, and the resin reacts and cures. After the lens comes out of the oven, a lens substrate 1 with a photochromic layer 8 is obtained. The lens is then left to stand for a period of time until the lens temperature drops below 40 degrees Celsius. It is then immersed in an antistatic liquid, and the lifting speed is controlled to slowly raise the lens to make the liquid film on the lens surface smooth. After heating and curing, the solvent in the liquid layer evaporates, and the resin cures to form an antistatic layer 4. A toughness layer 5 is applied using the same process. Afterward, a hardening layer 6 and a coating layer 7 are applied to both sides of the lens substrate 1 using conventional hardening and coating processes.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as lens substrate 1, convex surface 11, concave surface 12, anti-blue light layer 3, antistatic layer 4, toughness layer 5, hardening layer 6, coating layer 7, and photochromic layer 8, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A coated photochromic lens, comprising a lens substrate (1) having a convex surface (11) and a concave surface (12), characterized in that, The lens substrate (1) has an anti-blue light layer (3), an anti-static layer (4), a toughness layer (5), a hardening layer (6) and a coating layer (7) arranged sequentially from the inside to the outside on the outer side of the convex surface (11) and the concave surface (12) of the lens substrate (1), and a photochromic layer (8) is provided between the anti-blue light layer (3) and the anti-static layer (4) on the outer side of the convex surface (11) of the lens substrate (1).

2. The photochromic lens according to claim 1, characterized in that, The lens substrate (1) is an acrylic substrate.

3. The photochromic lens according to claim 1, characterized in that, The anti-blue light layer (3) is formed by dip coating.

4. The photochromic lens according to claim 1, characterized in that, The color-changing layer (8) is formed by spin coating.

5. A photochromic lens with coating according to claim 1, characterized in that, The thickness of the color-changing layer (8) is 10.0-20.0 micrometers.

6. The photochromic lens according to claim 1, characterized in that, The antistatic layer (4) and the toughness layer (5) are formed by dip coating.

7. A photochromic lens with coating according to claim 1, characterized in that, The toughness layer (5) has a thickness of 3.0-5.0 micrometers.

8. A photochromic lens with coating according to claim 1, characterized in that, The thickness of the hardening layer (6) is 2.0-4.0 micrometers.

9. A photochromic lens with a coating according to claim 1, characterized in that, The coating layer (7) is 7-11 layers of metal oxide layers or fluoride coatings with different refractive indices.

10. A coated photochromic lens according to claim 1, characterized in that, The coating layer (7) is formed by vacuum coating, and the total thickness of the coating layer (7) is 300-500 nanometers.

Images