Washable depolarizing film

Abstract

The utility model discloses a cleanable depolarization film which comprises a substrate, a first protective film layer made of aluminum oxide is plated on the substrate, a depolarization film layer is plated on the first protective film layer, an anti-dazzle film layer is plated on the depolarization film layer, and a second protective film layer made of aluminum oxide is plated on the anti-dazzle film layer. The depolarization film solves the problems that an existing depolarization film is easy to clean, damage and oxidize, and the light splitting performance is affected, through the depolarization film layer, the light splitting performance is improved, meanwhile, the polarization degree of light is reduced, and through the anti-oxidation film layer, invasion of oxygen molecules is effectively blocked, so that the light splitting performance is improved. An internal film layer is prevented from oxidation reaction, so that the service life of the product is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of depolarization film technology, specifically a washable depolarization film. Background Technology

[0002] In the field of optics, depolarizing films are widely used in various optical instruments and equipment, such as camera lenses, telescopes, and microscopes, to eliminate the polarization of light and improve the imaging quality of optical systems. However, existing depolarizing film products generally have some problems. On the one hand, during daily use, the film surface is easily contaminated with dust, oil, and other pollutants. When cleaning, existing depolarizing films are easily damaged, leading to a decline in the film's optical performance or even loss of its depolarizing function. On the other hand, when depolarizing films are exposed to air for a long time, they are prone to chemical reactions with oxygen, resulting in oxidation. This not only changes the chemical composition and microstructure of the film but also gradually deteriorates its optical performance, shortening the product's lifespan.

[0003] Meanwhile, the existing depolarization films also need improvement in their spectral performance. Their spectral curves cannot adequately meet the requirements of some applications with strict requirements on light polarization and spectral distribution, resulting in insufficient processing capability of optical systems for different wavelengths of light in practical use, affecting the clarity and color reproduction of images. Utility Model Content

[0004] The purpose of this invention is to provide a washable depolarizing film. The depolarizing film layer improves the spectral splitting performance and reduces the polarization of light. The anti-oxidation film layer effectively blocks the intrusion of oxygen molecules and prevents oxidation reactions in the internal film layer, thereby extending the product's service life.

[0005] This utility model provides the following technical solution: a washable depolarizing film, comprising a substrate, a first protective film layer of aluminum oxide deposited on the substrate, a depolarizing film layer deposited on the first protective film layer, the thickness of the depolarizing film layer being 200-400nm, an anti-glare film layer deposited on the depolarizing film layer, a second protective film layer of aluminum oxide deposited on the anti-glare film layer, and an anti-oxidation film layer deposited on the second protective film layer.

[0006] Furthermore, the first protective film layer is aluminum oxide with a thickness of 100-150 nm.

[0007] Furthermore, the depolarization film layer converts light with different polarization states into uniform unpolarized light within the visible light wavelength range of 400nm-760nm, with a splitting ratio of 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, and 2:8, and the degree of polarization is less than 5%.

[0008] Furthermore, the thickness of the anti-glare film layer is 50-80 nm.

[0009] Furthermore, the second protective film layer is aluminum oxide with a thickness of 80-120 nm.

[0010] Furthermore, the thickness of the antioxidant film is 100-150 nm.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0012] (1) Improve the beam splitting performance by using an antipolarization film layer, while reducing the polarization degree of the light;

[0013] (2) The anti-oxidation film layer effectively blocks the intrusion of oxygen molecules, preventing oxidation reaction in the internal film layer, thereby extending the service life of the product. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the transmittance of the depolarization film of this utility model;

[0017] Figure 3 This is a schematic diagram of the polarization degree of the depolarization film of this utility model;

[0018] In the figure: 1. Substrate; 2. First protective film layer; 3. Antipolarization film layer; 4. Anti-glare film layer; 5. Second protective film layer; 6. Anti-oxidation film layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1The present invention provides a technical solution: a washable depolarizing film, comprising a substrate 1, wherein the substrate 1 is optical glass or quartz. The substrate 1 undergoes strict cleaning and pretreatment, and is cleaned in an ultrasonic cleaner for 15-20 minutes in sequence with organic solvents such as acetone and alcohol to remove oil, dust and other impurities from the surface of the substrate 1. Finally, the substrate 1 is rinsed clean in deionized water and dried in an oven at 100-120℃ for 30-60 minutes.

[0021] A first protective film layer 2 made of aluminum oxide is deposited on substrate 1, and a vacuum is drawn until the pressure is below 1×10. -3 Pa, turn on the ion source, adjust the ion beam energy to 500-800 eV, and the beam current to 50-100 mA. Mount an AL2O3 target with a purity of 99.99% on the sputtering source, introduce an appropriate amount of argon gas as the sputtering gas, and start sputtering at a coating rate of 30 A / S under a temperature of 80 degrees Celsius. Control the coating time to 15-20 minutes, so that the thickness of the first protective film layer 2 reaches about 100-150 nm.

[0022] like Figure 2 and 3 As shown, a depolarization film layer 3 is deposited on the first protective film layer 2. Maintaining a vacuum environment and with the ion source on, the target material is replaced with a depolarization film material. Based on the required depolarization performance and spectroscopic curve requirements, the coating process parameters are precisely adjusted. The coating is carried out at 80 degrees Celsius at a rate of 30 A / s. The coating time depends on the designed thickness of the depolarization film layer, generally 30-60 minutes, so that the thickness of the depolarization film layer 3 reaches 200-400 nm. Within the visible light wavelength range of 400 nm-760 nm, light of different polarization states is converted into uniform unpolarized light, with spectroscopic ratios reaching 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, and 2:8, and the degree of polarization is less than 5%.

[0023] An anti-glare film layer 4 is deposited on the depolarization film layer 3. After the depolarization film layer 3 is deposited, the vacuum state of the equipment is kept unchanged, and the AG film target material is replaced. The ion source parameters are adjusted again, and the ion beam energy is adjusted to 300-500eV and the beam current is 30-80mA. At a temperature of 80 degrees, the anti-glare film layer 4 is deposited at a rate of 25-35A / S for 10-15 minutes, so that the thickness of the anti-glare film layer 4 reaches 50-80nm.

[0024] A second protective film layer 5 made of alumina is deposited on the anti-glare film layer 4. Without changing the vacuum environment and the ion source on state, the alumina target is reinstalled, and the second protective film layer 5 is deposited at a temperature of 80 degrees Celsius and a deposition rate of 30 A / S for 10-15 minutes, so that the thickness of the second protective film layer 5 reaches 80-120 nm. The first protective film layer 2 and the second protective film layer 5 provide a flat, stable and chemically inert base surface for the subsequent depolarization film layer 3, enhancing the adhesion between the depolarization film layer 3 and the substrate 1. At the same time, alumina itself has a certain hardness and wear resistance, which can initially protect the subsequent film layer from minor physical damage from the outside.

[0025] An antioxidant film layer 6 is deposited on the second protective film layer 5. The antioxidant film target is mounted on the sputtering source, and the vacuum and ion source parameters are kept stable. The antioxidant film layer 6 is deposited at 80 degrees Celsius at a rate of 20-30 A / s for 15-20 minutes, resulting in a thickness of 100-150 nm. After the coating is completed, the ion source and sputtering source are turned off. After the temperature in the vacuum chamber drops to room temperature, the prepared washable, oxidation-resistant, and depolarized film product is taken out. This antioxidant film material has extremely low oxygen permeability and good chemical stability. Its molecular structure can effectively block the intrusion of oxygen molecules, preventing oxidation reactions in the internal film layer, thereby extending the product's service life. Furthermore, this antioxidant film material also has certain self-cleaning properties. Its surface microstructure makes it difficult for dust, oil, and other contaminants to adhere. Even if they do adhere, they can be easily removed by water flow or gentle wiping, greatly improving the product's washability.

[0026] Experimental comparison: After 10 standard cleaning tests (using professional optical cleaning fluid and equipment to simulate daily cleaning operations), the optical properties of the film remained essentially unchanged, and the depolarization effect remained stable, demonstrating its excellent cleanability. In contrast, traditional depolarization films exhibit delamination and cleaning damage under the same conditions.

[0027] In the anti-oxidation test, the product was placed in a high-temperature, high-humidity and oxygen-rich environment (temperature 80℃, relative humidity 80%, oxygen concentration 20%) for 48 hours. The film layer did not show obvious signs of oxidation, the surface remained smooth, and there were no discoloration, peeling or other phenomena. In contrast, traditional anti-polarization film products showed obvious oxidation and performance degradation in just 4 hours under the same conditions.

[0028] The above experiments have fully demonstrated that this product has a longer service life and better stability.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A washable depolarizing film, comprising a substrate, characterized in that: The substrate is coated with a first protective film layer made of aluminum oxide, the first protective film layer is coated with an anti-polarization film layer with a thickness of 200-400nm, the anti-polarization film layer is coated with an anti-glare film layer, the anti-glare film layer is coated with a second protective film layer made of aluminum oxide, and the second protective film layer is coated with an anti-oxidation film layer.

2. The washable depolarizing film according to claim 1, characterized in that: The first protective film layer is aluminum oxide with a thickness of 100-150 nm.

3. The washable depolarizing film according to claim 1, characterized in that: The depolarization film layer converts light with different polarization states into uniform unpolarized light within the visible light wavelength range of 400nm-760nm, with splitting ratios of 8:2, 7:3, 6:4, 5:5, 4:6, 3:7, and 2:8, and the degree of polarization is less than 5%.

4. The washable depolarizing film according to claim 1, characterized in that: The thickness of the anti-glare film is 50-80 nm.

5. The washable depolarizing film according to claim 1, characterized in that: The second protective film is aluminum oxide, with a thickness of 80-120 nm.

6. The washable depolarizing film according to claim 1, characterized in that: The thickness of the antioxidant film is 100-150 nm.

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