Lens barrel
By configuring multiple layers of interference films and anti-fouling and scratch-resistant protective layers on the outer surface of the lens barrel, the problems of high reflectivity and easy dirt accumulation of the lens barrel are solved, achieving ultra-low reflection, protection, and durability of the lens barrel, meeting the high-quality appearance requirements for both consumer and commercial applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-20
AI Technical Summary
Existing low-reflection treatment technologies for lens barrel surfaces cannot meet the high standards for surface flatness and thickness required for consumer and commercial miniature lenses. Furthermore, traditional black film coatings are prone to dirt and wear, making it difficult to maintain long-term quality and stability.
A multilayer interference film and a dirt-resistant and scratch-resistant protective layer are configured on the outer surface of the lens barrel. By combining the refractive index and thickness, destructive interference is formed, reducing the reflectivity to an extremely low level. The dirt-resistant and scratch-resistant protective layer improves the protective performance and stability of the lens barrel.
It achieves ultra-low reflectivity on the lens barrel surface, providing excellent concealment, protection, and long-term stability, meeting the demands of modern consumer products for high quality and precision appearance.
Smart Images
Figure CN224020009U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an optical element, and particularly relates to a lens barrel. BACKGROUND
[0002] With the rapid increase of visual image demand of consumer and commercial products, miniaturized lenses are increasingly widely used in various fields. Users have higher and higher requirements for the concealment of lenses in terminal products, and expect the lenses to have a lower presence on devices. Therefore, the demand for low reflection processing technology of the appearance surface of the lens barrel continues to increase.
[0003] One prior art is to spray black paint or paste black film on the appearance surface of the lens barrel. However, the conventional black paint spraying or black film pasting process cannot meet the high standard requirements of surface flatness and thickness of consumer and commercial miniature lenses due to uneven thickness and insufficient precision.
[0004] Another prior art is to coat black film material on the appearance surface of the lens barrel. Although the black film material coating technology has improved some optical performance, the reflectivity is still not low enough. In addition, the coated surface of this technology is prone to dirt and wear, making it difficult to maintain the long-term quality and stability of the appearance of the lens barrel. SUMMARY
[0005] The utility model is directed to a lens barrel which has low reflectivity, good protective performance and good long-term stability, and has a precise appearance.
[0006] One embodiment of the utility model provides a lens barrel, which comprises a lens barrel body, a multilayer interference film and an anti-fouling and anti-scratch protective layer. The multilayer interference film is arranged on the outer surface of the lens barrel body, wherein the multilayer interference film comprises high-refractive-index films and low-refractive-index films stacked alternately. The anti-fouling and anti-scratch protective layer is arranged on the multilayer interference film, wherein the multilayer interference film is arranged between the lens barrel body and the anti-fouling and anti-scratch protective layer. The reflectivity of the outer surface of the lens barrel formed by the combination of the refractive index and thickness of the anti-fouling and anti-scratch protective layer and the multilayer interference film is less than or equal to 0.2%.
[0007] In the lens barrel of the embodiment of the present application, the multilayer interference film and the anti-fouling and anti-scratching protective layer are arranged on the outer surface of the lens barrel body, and the refractive index and thickness of the anti-fouling and anti-scratching protective layer and the multilayer interference film are matched according to the principle of film interference to make the reflected light form destructive interference, thereby greatly suppressing the intensity of the reflected light. Therefore, the reflectivity of the outer surface of the lens barrel formed by the refractive index and thickness of the anti-fouling and anti-scratching protective layer and the multilayer interference film is less than or equal to 0.2%, that is, the appearance surface of the lens barrel can have very low reflectivity, thereby making the lens barrel have good concealment. In addition, since the anti-fouling and anti-scratching protective layer is arranged on the multilayer interference film, the lens barrel can have good protection performance and good long-term stability, and can have a precise appearance.
[0008] In order to make the above features and advantages of the present application more obvious and easy to understand, the following specific examples are described in detail below, and the drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1A A perspective view showing the appearance of the lens barrel of an embodiment of the present application.
[0010] Figure 1B A cross-sectional view of the lens barrel of the present application along the optical axis A1. Figure 1A A cross-sectional view of the surface structure of the lens barrel of the present application.
[0011] Figure 2 A cross-sectional view of the surface structure of the lens barrel of the present application. Figure 1B A cross-sectional view of the surface structure of the lens barrel of the present application.
[0012] Figure 3 A reflectivity spectrum of the outer surface of the lens barrel of the present application and a reflectivity spectrum of the outer surface of the lens barrel body without being plated with the multilayer interference film and the anti-fouling and anti-scratching protective layer. Figure 2
[0013] A cross-sectional view of the surface structure of the lens barrel of another embodiment of the present application. Figure 4A DETAILED DESCRIPTION Figure 4B Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the different drawings and the description to refer to the same or like parts.
[0014] Reference will now be made in detail to the exemplary embodiments of the present application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the different drawings and the description to refer to the same or like parts.
[0015] Figure 1A A perspective view showing the appearance of the lens barrel of an embodiment of the present application, Figure 1B A cross-sectional view of the lens barrel of the present application along the optical axis A1, and Figure 1A A cross-sectional view of the surface structure of the lens barrel of the present application. Figure 2 A cross-sectional view of the surface structure of the lens barrel of the present application. Figure 1B A cross-sectional view of the surface structure of the lens barrel of the present application. Figure 1A 、 Figure 1B and Figure 2 The lens barrel 100 of the present embodiment can be used to house at least one lens 50 to form an optical lens, wherein the lens barrel 100 can have a housing space 104 to house the lens 50, and can have an opening 106 to expose the lens 50. Light from the outside can enter the lens 50 inside the lens barrel 100 through the opening 106, and be refracted by the lens 50. The lens barrel 100 of the present embodiment comprises a lens barrel body 110, a multilayer interference film 120, and an anti-fouling and anti-scratching protective layer 130. The multilayer interference film 120 is arranged on the outer surface 112 of the lens barrel body 110, wherein the multilayer interference film 120 comprises alternately stacked high refractive index films 122 and low refractive index films 124. The anti-fouling and anti-scratching protective layer 130 is arranged on the multilayer interference film 120, wherein the multilayer interference film 120 is arranged between the lens barrel body 110 and the anti-fouling and anti-scratching protective layer 130. By properly utilizing the film interference principle, the reflectivity of the outer surface 102 of the lens barrel 100 formed by the combination of the refractive index and thickness of the anti-fouling and anti-scratching protective layer 130 and the multilayer interference film 120 is less than or equal to 0.2%.
[0016] In the present embodiment, the lens barrel body 110 is a lens barrel component in a consumer electronic product, a commercial monitoring system, or an optical instrument, for example, a lens barrel component of a camera, a mobile phone, or a tablet computer. In the present embodiment, the material of the lens barrel body 110 is plastic, for example, black plastic, but the present utility model is not limited thereto. In other embodiments, the lens barrel body 110 can also be made of other suitable materials.
[0017] The refractive index of the high refractive index film 122 is, for example, in the range of 2.16 to 2.3, the refractive index of the low refractive index film 124 is, for example, in the range of 1.38 to 1.54, and the refractive index of the high refractive index film 122 is greater than the refractive index of the low refractive index film 124. In the present embodiment, the material of the high refractive index film 122 is, for example, tantalum trioxide, titanium dioxide, or titanium trioxide, and the material of the low refractive index film 124 is, for example, silicon dioxide or aluminum trioxide. In the present embodiment, the thickness T2 of the multilayer interference film 120 is in the range of 240 nanometers to 410 nanometers.
[0018] In addition, the refractive index of the anti-fouling and anti-scratching protective layer 130 is, for example, in the range of 1.3 to 1.45. In the present embodiment, the material of the anti-fouling and anti-scratching protective layer 130 is a fluorine-containing compound or a fluorine-containing polymer, for example, C8F 17The present invention is not limited to polymers or compounds having the chemical formulas CH2CH2Si(OCH3)3, CF3(CF2)9CH2CH2SiCl3, CF3(CF2)7CH2CH2SiCl3, or others. Fluoropolymers, for example, possess hydrophobic and oleophobic properties. Furthermore, in this embodiment, the thickness T1 of the antifouling and scratch-resistant protective layer falls within the range of 5 nanometers to 50 nanometers.
[0019] In this embodiment, the low reflection effect (e.g., reflectivity less than or equal to 0.2%) formed by the combination of the refractive index and thickness of the anti-fouling and anti-scratch protective layer 130 and the multilayer interference film 120 is suitable for the visible light band, for example, for light with wavelengths from 420 nanometers to 700 nanometers.
[0020] Figure 3 for Figure 2 The graph shows the reflectance spectrum of the outer surface of the microscope tube and the reflectance spectrum of the outer surface of the microscope tube body without multi-layer interference film and anti-fouling and scratch-resistant protective layer. Please refer to... Figure 3 The curve labeled "uncoated" refers to the reflectance spectrum of the outer surface 112 of the lens barrel body 110 without the coating of the multilayer interference film 120 and the anti-fouling and anti-scratch protective layer 130, while the curve labeled "this embodiment" refers to... Figure 2 The reflectance spectrum curve of the outer surface 102 of the lens tube 100. Figure 3 It can be verified that the mirror tube 100 of this embodiment, after adopting a multilayer interference film 120 and a dirt-proof and scratch-resistant protective layer 130, can indeed significantly reduce the reflectivity of the outer surface.
[0021] In the lens barrel 100 of this embodiment, a multilayer interference thin film 120 and a dirt-resistant and scratch-resistant protective layer 130 are disposed on the outer surface 112 of the lens barrel body 110. The combination of the refractive index and thickness of the dirt-resistant and scratch-resistant protective layer 130 and the multilayer interference thin film 120, based on the principle of thin-film interference, causes the reflected light to form destructive interference, thereby significantly suppressing the intensity of the reflected light. Therefore, the reflectivity of the outer surface 102 of the lens barrel 100 formed by the combination of the refractive index and thickness of the dirt-resistant and scratch-resistant protective layer 130 and the multilayer interference thin film 120 is less than or equal to 0.2%. In other words, the outer surface of the lens barrel 100 can thus have extremely low reflectivity, thereby giving the lens barrel 100 excellent concealment. Furthermore, because the dirt-resistant and scratch-resistant protective layer 130 is disposed on the multilayer interference thin film 120, the lens barrel 100 has good protective performance, good durability, and good long-term stability, enabling it to have a precise appearance, and the appearance color of the lens barrel 100 can remain stable and consistent over a long period.
[0022] In addition, in the embodiment, the multilayer interference film 120 and the anti-fouling and anti-scratching protective layer 130 can be deposited on the outer surface 112 of the lens barrel body 110 by a precise vacuum deposition process, and a film layer structure in which the high-refractive film 122 and the low-refractive film 124 are alternately stacked is constructed by using the optical design principle (i.e., the thin film interference principle), so as to effectively interfere and eliminate the reflected light of the outer surface 102 of the lens barrel 100, and greatly reduce the surface reflectivity to a very low level. For example, the multilayer interference film 120 can reduce the reflectivity of the lens barrel surface from the original 4.5% to 0.3%, thereby achieving excellent optical performance. In addition, the anti-fouling and anti-scratching protective layer 130 can further reduce the reflectivity of the lens barrel surface to 0.2% or more, thereby achieving the effect of ultra-low reflectivity. In addition, the nanoscale anti-fouling and anti-scratching protective layer 130 can achieve excellent water and oil resistance and surface hardness enhancement effect, thereby significantly improving the dirt resistance and scratch resistance of the lens barrel 100. Furthermore, the film deposition scheme takes into account the mechanical stability, environmental resistance and long-term reliability in the design and process of the film layer structure, so as to ensure that the appearance performance of the lens barrel is stable and continuous. In an embodiment, the above-mentioned vacuum deposition process can include electron beam evaporation and ion-assisted deposition, so as to ensure the uniformity and adhesion of the film layer thickness.
[0023] The lens barrel 100 of the embodiment is significantly superior to the conventional process in terms of optical performance, protection performance and durability. The lens barrel 100 of the embodiment solves the problems of poor film thickness control, wear and dirt of the conventional paint spraying or black film deposition. The lens barrel 100 of the embodiment achieves the perfect combination of ultra-low reflectivity, anti-fouling and anti-scratching performance of the lens barrel surface. The lens barrel 100 of the embodiment meets the needs of modern consumer products for high quality, precise appearance and long-term stability.
[0024] In the embodiment, the surface of the lens barrel 100 can be cleaned and pretreated before film deposition, so as to remove dust, grease and other contaminants on the surface and ensure the adhesion between the film layer and the surface of the lens barrel 100. Common treatment methods include using ultrasonic cleaning to remove surface particles and organic matter, and can include using plasma treatment to activate the lens barrel surface and improve the adhesion of the film layer.
[0025] The film deposition conditions of the multilayer interference film 120 include controlling the vacuum degree, film deposition temperature and deposition rate, so as to ensure the uniformity of the film layer thickness and the stability of the optical performance. The film deposition method of the anti-fouling and anti-scratching protective layer 130 can uniformly cover the anti-fouling and anti-scratching protective layer 130 by a vacuum evaporation process. In an embodiment, the film deposition thickness can be ensured to be in the range of 10 nanometers to 30 nanometers.
[0026] After the multilayer interference film 120 and the anti-fouling and anti-scratching protective layer 130 are prepared, performance and reliability tests can be performed to verify whether the product achieves the expected effect. The test items can include optical performance tests, reliability tests, and process flow tests. Among them, the optical performance tests can measure whether the reflectivity meets the standard of 0.2% or less. The reliability tests can include high temperature and high humidity storage tests, low temperature storage tests, cold and hot impact tests, and vibration tests. The process flow tests can verify the processes such as lens assembly, testing, washing, packaging, transportation, module packaging, and module baking.
[0027] Figure 4A With Figure 4B The cross-sectional view of the surface layer structure of the lens barrel of another embodiment of the present application is shown. Please refer to Figure 4A In the lens barrel 100a of the present embodiment, the multilayer interference film 120a includes a high refractive index film 122, a low refractive index film 124, a high refractive index film 122, a low refractive index film 124, a high refractive index film 122, and a low refractive index film 124 stacked in order from the outer surface 112 of the lens barrel body 110 to the direction away from the lens barrel body 110. Please refer to Figure 4B In the lens barrel 100b of the present embodiment, the multilayer interference film 120b includes a low refractive index film 124, a high refractive index film 122, a low refractive index film 124, a high refractive index film 122, and a low refractive index film 124 stacked in order from the outer surface 112 of the lens barrel body 110 to the direction away from the lens barrel body 110. The film layer design of the lens barrel 100a and the lens barrel 100b helps to achieve good reflectivity reduction effect. In the multilayer interference films 120a and 120b of the lens barrel 100a and the lens barrel 100b, the interference film farthest from the lens barrel body 110 is a low refractive index film 124.
[0028] In summary, in the lens barrel of the embodiment of the present application, the multilayer interference film and the anti-fouling and anti-scratching protective layer are arranged on the outer surface of the lens barrel body, and the refractive index and thickness of the anti-fouling and anti-scratching protective layer and the multilayer interference film are matched according to the principle of film interference to make the reflected light form destructive interference, thereby greatly suppressing the intensity of the reflected light. Therefore, the reflectivity of the outer surface of the lens barrel formed by the matching of the refractive index and thickness of the anti-fouling and anti-scratching protective layer and the multilayer interference film is less than or equal to 0.2%, that is, the appearance surface of the lens barrel can have very low reflectivity, thereby making the lens barrel have good concealment. In addition, since the anti-fouling and anti-scratching protective layer is arranged on the multilayer interference film, the lens barrel can have good protection performance and good long-term stability, and can have a precise appearance.
[0029] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A microscope tube, characterized in that, include: Lens barrel body; A multilayer interference film is disposed on the outer surface of the mirror tube body, wherein the multilayer interference film includes alternating stacked high refractive index films and low refractive index films; as well as A stain-resistant and scratch-resistant protective layer is disposed on the multilayer interference film, wherein the multilayer interference film is disposed between the lens barrel body and the stain-resistant and scratch-resistant protective layer. The reflectivity of the outer surface of the lens barrel formed by the combination of the anti-fouling and anti-scratch protective layer and the refractive index and thickness of the multilayer interference film is less than or equal to 0.2%.
2. The lens barrel according to claim 1, characterized in that, The high refractive index film is a tantalum trioxide film, a titanium dioxide film, or a titanium pentoxide film, and the low refractive index film is a silicon dioxide film or an aluminum oxide film.
3. The lens barrel according to claim 1, characterized in that, The anti-fouling and scratch-resistant protective layer is a fluorinated compound layer or a fluorinated polymer layer.
4. The lens barrel according to claim 1, characterized in that, The multilayer interference film comprises high, low, high, low, high and low refractive index films stacked sequentially from the outer surface of the mirror body away from the mirror body.
5. The lens barrel according to claim 1, characterized in that, The multilayer interference film comprises low, high, low, high and low refractive index films stacked sequentially from the outer surface of the mirror body away from the mirror body.
6. The lens barrel according to claim 1, characterized in that, The thickness of the anti-fouling and scratch-resistant protective layer falls within the range of 5 nanometers to 50 nanometers.
7. The lens barrel according to claim 1, characterized in that, The main body of the lens tube is a plastic tube.
8. The lens barrel according to claim 1, characterized in that, The lens barrel body is a lens barrel component in consumer electronics products, commercial monitoring systems, or optical instruments.
9. The lens barrel according to claim 1, characterized in that, The low reflection resulting from the combination of the anti-fouling and scratch-resistant protective layer and the refractive index and thickness of the multilayer interference film is for light with wavelengths from 420 nm to 700 nm.