A method for processing AR glasses lenses

Abstract

This invention relates to a processing method for AR eyeglass lenses, belonging to the field of glass surface treatment technology. To address the problems of poor color difference and PV value in existing products, a processing method for AR eyeglass lenses is provided. The method includes placing the AR eyeglass lens to be coated in a vacuum coating chamber, first performing a titanium pentoxide (TiO2) coating to form a TiO2 coating layer one on the surface of the AR eyeglass lens; then performing a silicon dioxide coating to form a silicon dioxide coating layer one on the surface of the TiO2 coating layer one; repeating the TiO2 coating step A and the silicon dioxide coating step B, sequentially forming a TiO2 coating layer two, a silicon dioxide coating layer two, a TiO2 coating layer three, and a silicon dioxide coating layer three, until the coating process is complete, resulting in a coated AR eyeglass lens. This method enables the formed coating layers to have a low overall color difference value and a purple color effect, making it better suited for AR eyeglass lenses.

Description

Technical Field

[0001] This invention relates to a processing method for AR eyeglass lenses, belonging to the field of glass surface treatment technology. Background Technology

[0002] Augmented Reality (AR) technology provides a richer visual experience by overlaying virtual images or graphics provided by computers onto actual images of the real world. With the development of smart technology, AR smart glasses technology is becoming increasingly sophisticated and has penetrated various fields such as industrial assistance, security, education, and museum displays. However, the optical precision requirements for smart glasses lenses differ from those for ordinary optical glass processing. Smart glasses lenses have higher requirements, especially regarding anti-reflective properties and PV values, and the color of the lenses must also be consistent with the AR glasses. This necessitates improving the performance of lenses in products like smart AR glasses to provide a better visual experience. Current processing methods for AR glasses lenses utilize coating techniques to enhance their functionality. Existing literature also describes methods for improving the optical performance of glass panels or lenses by alternately depositing titanium pentoxide and silicon dioxide coatings. For example, a lens processing method disclosed in existing literature (Publication No.: CN1079718214A) involves alternately depositing silicon dioxide and titanium pentoxide coatings on the surface of an annealed lens, controlling the coating temperature at 50℃~70℃, and the silicon dioxide coating rate at which… The rate of depositing the titanium pentoxide film is Ultimately, a corresponding coating layer is formed. However, the coating layer formed by this coating method is mainly to make the lens have ultra-high hardness and abrasion resistance, reduce reflection and increase light transmittance, effectively filter more than 33% of harmful blue light and relieve visual fatigue. However, the surface PV value of this coating layer is too high, which is not conducive to its application in AR glasses lenses. In addition, the reflectivity of the coating layer has no special requirements, resulting in the overall color difference value not meeting the requirements. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a processing method for AR glasses lenses, solving the problem of how to achieve stable color difference values ​​and low PV values.

[0004] The objective of this invention is achieved through the following technical solution: a method for processing AR glasses lenses, characterized in that the method includes the following steps:

[0005] A. Place the AR glasses lens to be coated into the vacuum coating chamber, control the coating temperature at 100℃~110℃, and first perform titanium pentoxide coating, controlling the titanium pentoxide evaporation rate to be... A titanium pentoxide coating layer with a thickness of 14.4 nm to 14.6 nm is formed on the surface of the AR glasses lens;

[0006] B. Next, perform silicon dioxide coating, controlling the coating temperature at 100℃~110℃, and controlling the silicon dioxide evaporation rate at [missing information]. A silicon dioxide coating layer with a thickness of 34.1 nm to 34.3 nm is formed on the surface of the titanium pentoxide coating layer.

[0007] C. Repeat the titanium pentoxide coating in step A and the silicon dioxide coating in step B to sequentially form a second titanium pentoxide coating layer with a thickness of 51.8nm to 52.0nm, a second silicon dioxide coating layer with a thickness of 9.8nm to 10.5nm, a third titanium pentoxide coating layer with a thickness of 45.9nm to 46.1nm, and a third silicon dioxide coating layer with a thickness of 92.9nm to 93.1nm. The coating process is then complete, and the coated AR glasses lens is obtained.

[0008] This invention improves the coating method and coating system structure, adjusts the coating temperature during the coating of each layer, and controls the coating rates of the silicon dioxide and titanium pentoxide layers. This allows for faster diffusion and sputtering of the corresponding titanium pentoxide or silicon dioxide in the vacuum coating chamber to the lens surface under higher temperatures and higher coating rates, resulting in a more uniform ion density distribution within a unit area. This effectively improves the density of the formed titanium pentoxide or silicon dioxide coating layers, thereby effectively reducing the surface PV value and reflectivity of the coating layer. Simultaneously, the overall structure of the film system is redesigned to employ a six-layer structure with specific control over the thickness of each layer, ensuring that the thickness of each layer is within the specified range. This results in a coating layer with low color difference and a purple color effect, making it better suited for AR glasses lenses. The lens formed by the coating process of this invention has a PV value of less than 2μm, a color difference value a is in the range of 0.8 to 2.7 and b is in the range of -0.8 to -6.3, the color difference value deviation is small and stable, and the reflectivity is low in the 410nm to 680nm wavelength range. In addition, a specific curve with a peak value is formed in the 410nm to 450nm wavelength range, which has the effect of low reflectivity.

[0009] In the above-described processing method for AR eyeglass lenses, preferably, the target source power used in step A (titanium pentoxide coating) and step B (silicon dioxide coating) is 1.9KW to 2.0KW. Conventional coatings typically use relatively low target sources (500W to 1.0KW, or low-power radio frequency ion sources); however, this invention increases the power, allowing the overall coating process to be performed at high power and with the aforementioned high coating rate, thus better achieving the performance requirements of low reflectivity and low PV value for the coating layer.

[0010] In the above-mentioned processing method for AR glasses lenses, preferably, the thickness of the first titanium pentoxide coating layer is 14.42 nm, and the thickness of the first silicon dioxide coating layer is 34.11 nm; the thickness of the second titanium pentoxide coating layer is 51.88 nm, and the thickness of the second silicon dioxide coating layer is 10 nm; the thickness of the third titanium pentoxide coating layer is 45.96 nm, and the thickness of the third silicon dioxide coating layer is 92.93 nm. By further controlling the thickness of each coating layer, the formed coating layer can meet the color difference value requirements of a specific curve, forming the required peak value in the wavelength range of 410 nm to 450 nm, while not exceeding the standard reference value limit in the specific curve requirements, avoiding intersection, and ensuring that the formed lens has the required light purple color and color difference value.

[0011] In the above-described processing method for AR glasses lenses, preferably, the vacuum degree of the vacuum coating chamber in step A is controlled at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 Controlling the vacuum level in the vacuum coating chamber is more conducive to the formation of the corresponding coating layer and the uniformity of the film layer, and thus improves the quality of the film layer.

[0012] In the above-mentioned processing method for AR glasses lenses, preferably, the evaporation rate of the titanium pentoxide is: The evaporation rate of the silicon dioxide is This allows the formed coating layer to have better stability and density, thereby improving the overall PV value performance and achieving more stable low PV value requirements.

[0013] In the above-mentioned processing method for AR glasses lenses, preferably, the surface of the AR glasses lens is first cleaned with an ion source before the titanium pentoxide coating layer is applied in step A. Cleaning the surface removes impurities, increases the surface activity of the lens, and is more conducive to improving the adhesion of the coating layer and enhancing the adhesion effect. As a further preferred embodiment, the ion source cleaning specifically involves:

[0014] Argon gas was introduced into the vacuum coating chamber to bombard the AR glasses lenses with ions, with the temperature controlled at 70℃~75℃ and the ion bombardment rate at [missing value]. Argon flow rate is controlled between 15 sccm and 18 sccm.

[0015] In summary, compared with the prior art, the present invention has the following advantages:

[0016] 1. By improving the design of the coating method and coating system structure, the coating temperature of each coating layer can be adjusted during coating, and the coating rate of silicon dioxide coating layer and titanium pentoxide coating rate can be controlled. By coating at a higher temperature, the overall coating layer can meet the requirement of low color difference value and the formed film layer has a purple color effect, which can be better used for AR glasses lenses.

[0017] 2. By specifically controlling the thickness of each coating layer, the resulting coating layer can meet the color difference value requirements of a specific curve, and form the required peak value in the wavelength range of 410nm to 450nm. Attached Figure Description

[0018] Figure 1 This is a reflectance analysis diagram of the coated lens obtained in Embodiment 2 of the present invention.

[0019] In the figure, SPEC represents the standard reference value; the example shows an example analysis curve of the reflectance of the AR glasses lens obtained in this embodiment. Detailed Implementation

[0020] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings, but the present invention is not limited to these embodiments.

[0021] Example 1

[0022] The AR glasses lens processing method in this embodiment specifically completes the coating process through the following method:

[0023] The cleaned AR glasses lenses to be coated are placed in a vacuum coating chamber, and argon gas is introduced. A Hall ion source is used to bombard the surface of the AR glasses lenses with ions, with the temperature controlled between 70℃ and 75℃, and the ion bombardment rate being [missing information]. The argon flow rate is controlled at 15 sccm to 18 sccm, and the cleaning time is 2 to 3 minutes.

[0024] After cleaning, stop the argon gas supply and adjust the vacuum level in the vacuum coating chamber to 1.0 x 10⁻⁶. -3 pa~1.2x10 -3The coating temperature is controlled at 100℃~110℃. The titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source). First, titanium pentoxide is coated, allowing it to evaporate and deposit as nano-sized molecules on the surface of the AR glasses lens, forming the first titanium pentoxide coating layer. During the coating process, the evaporation rate of the titanium pentoxide is controlled at [value missing]. A titanium pentoxide coating layer with a thickness of 14.4 nm to 14.6 nm is formed on one side surface of the AR glasses lens; preferably, the power of the radio frequency ion source used for the target source is 1.9 KW to 2.0 KW.

[0025] After forming the first titanium pentoxide coating layer, a silicon dioxide coating is then performed, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 The coating temperature was controlled at 100℃~110℃, and the silicon dioxide evaporation rate was controlled during the coating process. A silicon dioxide coating layer with a thickness of 34.1 nm to 34.3 nm is formed on the surface of the titanium pentoxide coating layer; preferably, the power of the radio frequency ion source of the target source is 1.9 kW to 2.0 kW.

[0026] Repeat the above process of titanium pentoxide coating and silicon dioxide coating, and perform alternating coatings;

[0027] That is, after the first layer of silicon dioxide coating is completed, the vacuum level in the vacuum coating chamber is adjusted to 1.0 x 10⁻⁶. - 3 pa~1.2x10 -3 The temperature is controlled at 100℃~110℃, and the titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source) to perform titanium pentoxide coating. During the coating process, the evaporation rate of titanium pentoxide is controlled at [value missing]. A second titanium pentoxide coating layer with a thickness of 51.8 nm to 52.0 nm is formed on the surface of the first silicon dioxide coating layer; preferably, the power of the radio frequency ion source of the target source is 1.9 kW to 2.0 kW.

[0028] After completing the second titanium pentoxide coating, a silicon dioxide coating is then applied, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 The coating temperature was controlled at 100℃~110℃, and the silicon dioxide evaporation rate was controlled during the coating process. A second silicon dioxide coating layer with a thickness of 9.8 nm to 10.5 nm is formed on the surface of the second titanium pentoxide coating layer; preferably, the power of the radio frequency ion source of the target source is 1.9 kW to 2.0 kW.

[0029] After the second silicon dioxide coating layer is deposited, maintain the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 The temperature is controlled at 100℃~110℃, and the titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source) to perform titanium pentoxide coating. During the coating process, the evaporation rate of titanium pentoxide is controlled at [value missing]. A titanium pentoxide coating layer three with a thickness of 45.9 nm to 46.1 nm is formed on the surface of the silicon dioxide coating layer two; preferably, the power of the radio frequency ion source of the target source used is 1.9 kW to 2.0 kW.

[0030] After the third layer of titanium pentoxide coating is completed, silicon dioxide coating is then performed, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 The coating temperature was controlled at 100℃~110℃, and the silicon dioxide evaporation rate was controlled during the coating process. A silicon dioxide coating layer with a thickness of 92.9 nm to 93.1 nm is formed on the surface of the titanium pentoxide coating layer three; preferably, the power of the radio frequency ion source of the target source used is 1.9 kW to 2.0 kW.

[0031] After coating, the AR glasses lens surface is sequentially coated from the inside out with the following layers: a titanium pentoxide coating layer with a thickness of 14.4nm to 14.6nm, a silicon dioxide coating layer with a thickness of 34.1nm to 34.3nm, a titanium pentoxide coating layer with a thickness of 51.8nm to 52.0nm, a silicon dioxide coating layer with a thickness of 9.8nm to 10.5nm, a titanium pentoxide coating layer with a thickness of 45.9nm to 46.1nm, and a silicon dioxide coating layer with a thickness of 92.9nm to 93.1nm. The overall coating process is then complete, and the coated AR glasses lens is obtained.

[0032] Performance testing of the obtained AR glasses lenses showed that AR glasses lenses coated within the above-mentioned range could achieve low reflectivity. Specifically, the PV value of the AR glasses lenses was less than 2μm, and the color difference values ​​a were in the range of 0.8 to 2.7 and b were in the range of -0.8 to -6.3, with small and stable color difference deviations. The reflectivity of the lenses in the 410nm-450nm band was required to be between 0.5% and 1%, while the reflectivity in the 480nm-680nm band was <0.5%, achieving a low reflectivity effect and forming a high-quality product with specific curve color difference requirements. The color of the AR glasses lenses was purple.

[0033] Example 2

[0034] The AR glasses lens processing method in this embodiment specifically completes the coating process through the following method:

[0035] The cleaned AR glasses lenses to be coated are placed in a vacuum coating chamber, and argon gas is introduced. A Hall ion source is used to bombard the surface of the AR glasses lenses with ions, with the temperature controlled between 70℃ and 75℃, and the ion bombardment rate being [missing information]. The argon flow rate was controlled at 17 sccm, and the cleaning time was 3 minutes.

[0036] After cleaning, stop the argon gas supply and adjust the vacuum level in the vacuum coating chamber to 1.0 x 10⁻⁶. -3 The coating temperature is controlled at 100℃, and the titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source). First, titanium pentoxide is coated, allowing it to evaporate and deposit as nano-sized molecules on the lens surface to form the first titanium pentoxide coating layer. During the coating process, the evaporation rate of the titanium pentoxide is controlled at [value missing]. A titanium pentoxide coating layer with a thickness of 14.42 nm is formed on the surface of the lens; the power of the radio frequency ion source used for the target source is 1.96 KW;

[0037] After forming the first titanium pentoxide coating layer, a silicon dioxide coating is then performed, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 The coating temperature was controlled at 100℃, and the evaporation rate of silicon dioxide was controlled during the coating process. A silicon dioxide coating layer with a thickness of 34.12 nm is formed on the surface of the titanium pentoxide coating layer; the power of the radio frequency ion source used for the target source is 1.96 KW.

[0038] Repeat the above process of titanium pentoxide coating and silicon dioxide coating, and perform alternating coatings;

[0039] That is, after the first layer of silicon dioxide coating is completed, the vacuum level in the vacuum coating chamber is adjusted to 1.0 x 10⁻⁶.- 3 The coating temperature is controlled at 100℃, and then the titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source) to perform titanium pentoxide coating. During the coating process, the evaporation rate of titanium pentoxide is controlled at [value missing]. A titanium pentoxide coating layer with a thickness of 51.88 nm is formed on the surface of the first silicon dioxide coating layer; the power of the radio frequency ion source used for the target source is 1.96 KW.

[0040] After completing the second titanium pentoxide coating, a silicon dioxide coating is then applied, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 The coating temperature was controlled at 100℃, and the evaporation rate of silicon dioxide was controlled during the coating process. A second silicon dioxide coating layer with a thickness of 10 nm is formed on the surface of the second titanium pentoxide coating layer; the power of the radio frequency ion source used for the target source is 1.96 KW;

[0041] After the second silicon dioxide coating layer is deposited, maintain the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 The coating temperature is controlled at 100℃, and then the titanium pentoxide target source is turned on to bombard the titanium pentoxide (e.g., using a Hall ion source) to perform titanium pentoxide coating. During the coating process, the evaporation rate of titanium pentoxide is controlled at [value missing]. A titanium pentoxide coating layer with a thickness of 45.96 nm was formed on the surface of the silicon dioxide coating layer two. The power of the radio frequency ion source used for the target source was 1.96 KW.

[0042] After the third layer of titanium pentoxide coating is completed, silicon dioxide coating is then performed, maintaining the vacuum level in the vacuum coating chamber at 1.0 x 10⁻⁶. -3 The coating temperature was controlled at 100℃, and the evaporation rate of silicon dioxide was controlled during the coating process. A silicon dioxide coating layer with a thickness of 92.93 nm was formed on the surface of the titanium pentoxide coating layer three; the power of the radio frequency ion source used for the target source was 1.96 KW.

[0043] After coating, the AR glasses lens is formed sequentially from the inside out: a 14.42nm thick titanium pentoxide coating layer 1, a 34.12nm thick silicon dioxide coating layer 1, a 51.88nm thick titanium pentoxide coating layer 2, a 10nm thick silicon dioxide coating layer 2, a 45.96nm thick titanium pentoxide coating layer 3, and a 92.93nm thick silicon dioxide coating layer 3. The overall coating is then completed, and the coated AR glasses lens is removed.

[0044] The obtained AR glasses lenses were subjected to performance testing. The results showed that the PV value of the AR glasses lenses was 1.14 μm, and the color difference values ​​a ranged from 0.8 to 2.7 and b ranged from -0.8 to -6.3, exhibiting small and stable deviations. Furthermore, the AR glasses lenses possessed low reflectivity, meeting requirements below the standard reference value. Specifically... Figure 1 As shown, SPEC represents a standard reference value, indicating that the lens obtained in this embodiment not only meets the requirement of low reflectivity, but also requires a reflectivity requirement of 0.5-1% in the 410nm-450nm wavelength band, that is, forming a peak requirement value in this wavelength range (in Figure 1 (The marked position) and simultaneously satisfy the requirement that the reflectivity of the AR glasses lens in the 480nm-680nm range is <0.5%, which has the effect of low reflectivity. The reflectivity curve of the AR glasses lens of the present invention does not intersect with the SPEC, and forms a high-quality product with specific curve color difference requirements. The color of the AR glasses lens is purple.

[0045] The specific embodiments described in this invention are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0046] Although the present invention has been described in detail and specific embodiments have been cited, it will be apparent to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the invention.

Claims

1. A method for processing AR glasses lenses, characterized in that, The method includes the following steps: A. Place the AR glasses lens to be coated into the vacuum coating chamber, and control the coating temperature at 100℃~110℃. First, perform titanium pentoxide coating, and control the evaporation rate of titanium pentoxide at 5Å / S~7Å / S to form a titanium pentoxide coating layer with a thickness of 14.4nm~14.6nm on the surface of the AR glasses lens. B. Then perform silicon dioxide coating, with the coating temperature controlled at 100℃~110℃ and the silicon dioxide evaporation rate controlled at 10Å / S~12Å / S, so that a silicon dioxide coating layer with a thickness of 34.1nm~34.3nm is formed on the surface of the first titanium pentoxide coating layer. C. Repeat the titanium pentoxide coating in step A and the silicon dioxide coating in step B to sequentially form a second titanium pentoxide coating layer with a thickness of 51.8 nm to 52.0 nm, a second silicon dioxide coating layer with a thickness of 9.8 nm to 10.5 nm, a third titanium pentoxide coating layer with a thickness of 45.9 nm to 46.1 nm, and a third silicon dioxide coating layer with a thickness of 92.9 nm to 93.1 nm. The coating process is then complete, and the coated AR glasses lens is obtained. The reflectivity of the AR glasses lens in the 410 nm to 450 nm wavelength band is required to be between 0.5% and 1%; the reflectivity in the 480 nm to 680 nm wavelength band is <0.5%.

2. The processing method for AR glasses lenses according to claim 1, characterized in that, The target source power used for the titanium pentoxide coating in step A and the silicon dioxide coating in step B is 1.9KW to 2.0KW.

3. The processing method for AR glasses lenses according to claim 1, characterized in that, The first titanium pentoxide coating layer has a thickness of 14.42 nm, and the first silicon dioxide coating layer has a thickness of 34.11 nm; the second titanium pentoxide coating layer has a thickness of 51.88 nm, and the second silicon dioxide coating layer has a thickness of 10 nm; the third titanium pentoxide coating layer has a thickness of 45.96 nm, and the third silicon dioxide coating layer has a thickness of 92.93 nm.

4. The processing method for AR eyeglass lenses according to claim 1, 2, or 3, characterized in that, The vacuum level of the vacuum coating chamber in step A is controlled at 1.0 x 10⁻⁶. -3 pa~1.2x10 -3 pa.

5. The method for processing AR eyeglass lenses according to claim 1, 2, or 3, characterized in that, The vapor deposition rate of the titanium pentoxide is 6.5 Å / s to 6.8 Å / s, and the vapor deposition rate of the silicon dioxide is 11 Å / s to 11.5 Å / s.

6. The method for processing AR eyeglass lenses according to claim 1, 2, or 3, characterized in that, Before applying the first titanium pentoxide coating layer to the AR glasses lens in step A, the surface of the AR glasses lens is first cleaned with an ion source.

7. The processing method for AR glasses lenses according to claim 6, characterized in that, The ion source cleaning specifically involves: Argon gas is introduced into the vacuum coating chamber to bombard the AR glasses lenses with ions. The temperature is controlled at 70℃~75℃, the ion bombardment rate is 160 Å / S~165 Å / S, and the argon gas flow rate is controlled at 15sccm~18sccm.

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