Modification method of optical glass, modified optical glass and optical device

Abstract

The invention relates to a modification method of optical glass, modified optical glass and an optical device. The modification method of the optical glass comprises the following steps: carrying out heat treatment on the optical glass, and naturally cooling or air-cooling at the temperature of less than or equal to 30 DEG C; the glass-transition temperature of the optical glass is Tg, the heat treatment temperature is greater than or equal to Tg-10 DEG C, and the air cooling speed is less than or equal to 1.5 m / s. According to the modification method of the optical glass, the optical glass is subjected to heat treatment at a proper temperature and then is naturally cooled at a proper temperature or is air-cooled at a proper air speed, so that the ice water impact resistance of the optical glass can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and particularly to a method for modifying optical glass, modified optical glass, and optical devices. Background Art

[0002] As special glass for manufacturing optical devices, optical glass plays a crucial role in optical systems. In many practical application scenarios, optical glass often faces complex environmental conditions, among which ice-water impact is a relatively common and challenging situation. The ice-water impact resistance of traditional optical glass is poor, and after being subjected to ice-water impact, surface cracks, breakage, or even fragmentation are likely to occur, severely limiting its application in various complex environments. Summary of the Invention

[0003] Based on this, this application provides a method for modifying optical glass, modified optical glass, and optical devices that can effectively improve the ice-water impact resistance.

[0004] The technical solutions for solving the above technical problems in this application are as follows.

[0005] In the first aspect of this application, a method for modifying optical glass is provided, including the following steps:

[0006] After heat-treating the optical glass, it is naturally cooled at ≤30°C or air-cooled; the glass transition temperature of the optical glass is Tg, the temperature of the heat treatment is ≥Tg - 10°C, and the wind speed of the air-cooling is ≤1.5 m / s.

[0007] In some embodiments of the method for modifying optical glass, the temperature of the heat treatment is ≤Tg + 30°C.

[0008] In some embodiments of the method for modifying optical glass, the wind speed of the air-cooling is ≤1 m / s.

[0009] In some embodiments of the method for modifying optical glass, the time of the heat treatment is 5 min to 60 min.

[0010] In some embodiments of the method for modifying optical glass, in the step of natural cooling, it is naturally cooled at 0°C to 30°C.

[0011] In some embodiments of the method for modifying optical glass, the temperature of the medium used for air-cooling is 0°C to 30°C.

[0012] In some embodiments of the method for modifying optical glass, the optical glass includes lanthanide glass;

[0013] And / or, the optical glass includes silica, and the mass of the silica accounts for 3% - 10% of the total mass of the optical glass.

[0014] In some of the embodiments, in the method for modifying the optical glass, by mass percentage, the optical glass includes the following components:

[0015] La2O3 40% - 50%, Y2O3 10% - 20%, Nb2O5 6% - 15%, ZrO2 5% - 15%, TiO2 3% - 10%, SiO2 3% - 10%, ZnO 2% - 9%, Ag2O 0.2% - 1%, Fe2O3 0.05% - 0.3%, SnO2 0.05% - 0.5%, HfO2 0.05% - 0.5%, CeO2 0.01% - 0.3%, Al2O3 0.02% - 0.5%, NiO 0.01% - 0.3%, Tb4O7 0.01% - 0.2%, MnO 0.01% - 0.2%, Sm2O3 0.01% - 0.2%, Sb2O3 0.01% - 0.2%, CaO 0.01% - 0.2% and K2O 0.001% - 0.05%.

[0016] The second aspect of the present application provides a modified optical glass prepared by using the method for modifying the optical glass provided in the first aspect.

[0017] The third aspect of the present application provides an optical device including the modified optical glass provided in the second aspect.

[0018] Beneficial effects:

[0019] In the method for modifying the optical glass of the present application, after heat-treating the optical glass at a suitable temperature, then naturally cooling it at a suitable temperature, or air-cooling it at a suitable wind speed, the anti-ice water impact performance of the optical glass can be effectively improved. Description of the drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application and more completely understand the present application and its beneficial effects, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

[0021] Figure 1 It is a diagram of the product situation after the ice water test of the modified optical glass provided in Example 1;

[0022] Figure 2 It is a diagram of the product situation after the ice water test of the optical glass substrate provided in Comparative Example 1. Detailed implementation manners

[0023] The following further elaborates on the present application in combination with the implementation manners and embodiments. It should be understood that these implementation manners and embodiments are only used to illustrate the present application and not to limit the scope of the present application. The purpose of providing these implementation manners and embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive.

[0024] It should also be understood that the present application can be implemented in many different forms and is not limited to the implementation manners and embodiments described herein. Those skilled in the art can make various changes or modifications without departing from the connotation of the present application, and the equivalent forms obtained also fall within the protection scope of the present application. For example, the features described as part of one implementation manner can be combined with another implementation manner in a suitable way to generate a new implementation manner. In addition, in the following description, a large number of specific details are given to provide a more thorough understanding of the present application. It should be understood that the present application can be implemented without one or more of these details.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing the implementation manners and embodiments and are not intended to limit the present application.

[0026] Unless otherwise stated or there are contradictions, the terms or phrases used herein have the following meanings:

[0027] In the present application, references to "multiple", "multiple types", "multiple times", etc., unless otherwise specified, mean greater than or equal to 2 in number. For example, "one or more types" means one type or greater than or equal to two types.

[0028] As used herein, "combinations thereof", "any combination thereof", "any combination mode thereof", etc. include all suitable combination modes of any two or more of the listed items.

[0029] In this document, the "suitable combination mode", "suitable way", "any suitable way", etc. described as "suitable" are subject to being able to implement the technical solution of the present application, solve the technical problems of the present application, and achieve the expected technical effects of the present application.

[0030] In this document, "preferred", "better", "more preferable", "it is advisable" are only used to describe the implementation manners or embodiments with better effects. It should be understood that they do not constitute a limitation on the protection scope of the present application. If "preferred" appears in multiple places in a technical solution, unless otherwise specified and there are no contradictions or mutual restrictions, each "preferred" is independent.

[0031] In this application, terms such as "further", "even further", "especially", etc. are used for descriptive purposes, indicating differences in content, but should not be construed as limiting the scope of protection of this application.

[0032] In this application, "optionally", "optional", "option" mean that it can be either present or absent, that is, it refers to any one of two alternative options of "present" or "absent". If the term "optional" appears multiple times in a technical solution, without special instructions and without contradictions or mutual constraints, each "optional" is independent of each other.

[0033] In this application, in "the first aspect", "the second aspect", "the third aspect", "the fourth aspect", etc., the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and should not be construed as indicating or implying relative importance or quantity, nor should they be construed as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumerative description and should be understood not to constitute a closed limitation on quantity.

[0034] In this application, for the technical features described in an open-ended manner, it includes both a closed technical solution composed of the listed features and an open technical solution containing the listed features.

[0035] In this application, when it comes to a numerical interval (i.e., a numerical range), without special instructions, the distribution of the optional numerical values within this numerical interval is considered continuous and includes the two numerical endpoints of this numerical interval (i.e., the minimum value and the maximum value), as well as each numerical value between these two numerical endpoints. Without special instructions, when the numerical interval only refers to the integers within this numerical interval, it includes the two endpoint integers of this numerical range, as well as each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all sub-ranges subsumed therein. The "numerical value" in this numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. The "numerical interval" allows for a broad inclusion of numerical interval types such as a percentage interval, a ratio interval, a ratio interval, etc.

[0036] For the temperature parameter in this application, without special limitations, it allows both constant temperature treatment and variation within a certain temperature range. It should be understood that the so-called constant temperature treatment allows the temperature to fluctuate within the accuracy range controlled by the instrument. Fluctuations within a range such as ±5°C, ±4°C, ±3°C, ±2°C, ±1°C are allowed.

[0037] In this application, the terms "room temperature" or "ambient temperature" generally refer to 4°C to 35°C, such as 20°C ± 5°C. In some embodiments of this application, "room temperature" or "ambient temperature" refers to 10°C to 30°C. In some embodiments of this application, "room temperature" or "ambient temperature" refers to 20°C to 30°C.

[0038] In this application, for units related to data ranges, if a unit is only attached after the right endpoint, it means that the units of the left endpoint and the right endpoint are the same. For example, 3~5 h means that the units of both the left endpoint "3" and the right endpoint "5" are h (hours).

[0039] All documents mentioned in this application are cited as references in this application, just as if each document was cited separately as a reference. Unless it conflicts with the inventive purpose and / or technical solution of this application, otherwise, the cited documents involved in this application are cited for all content and all purposes. When this application involves cited documents, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When this application involves cited documents, the examples and preferred methods of the relevant technical features cited can also be incorporated as references into this application, but only to the extent that this application can be implemented. It should be understood that when the cited content conflicts with the description in this application, this application shall prevail or be modified adaptively according to the description in this application.

[0040] The mass or weight of the relevant components mentioned in the specification of the embodiments of this application not only can refer to the specific content of each component, but also can represent the mass or weight ratio relationship between the components. Therefore, as long as the content of the relevant components in the specification of the embodiments of this application is scaled up or down proportionally, it is within the scope disclosed in the specification of the embodiments of this application. Specifically, the mass or weight described in the specification of the embodiments of this application can be units well-known in the chemical industry such as μg, mg, g, kg, etc.

[0041] One embodiment of this application provides a method for modifying optical glass, comprising the following steps:

[0042] After the optical glass is heat-treated, it is naturally cooled at ≤30°C or air-cooled; the glass transition temperature of the optical glass is Tg, the heat treatment temperature is ≥Tg - 10°C, and the air-cooling wind speed is ≤1.5 m / s.

[0043] The method for modifying the optical glass of this application, after the optical glass is heat-treated at a suitable temperature and then naturally cooled at a suitable temperature or air-cooled at a suitable wind speed, can effectively improve the anti-ice-water impact performance of the optical glass.

[0044] By heat treating the optical glass at a suitable temperature and then cooling it naturally at a suitable temperature, or air cooling it at a suitable wind speed, the surface of the optical glass shrinks rapidly and generates compressive stress, while the middle layer of the optical glass cools more slowly and does not have time to shrink and form tensile stress, thereby effectively improving the optical glass's resistance to ice and water impact.

[0045] In some of the examples, in the method for modifying optical glass, the temperature of the heat treatment is ≤Tg+30°C.

[0046] It can be understood that in some examples, Tg-10°C≤heat treatment temperature≤Tg+30°C; further, the heat treatment temperature includes but is not limited to Tg-10°C, Tg-8°C, Tg-6°C, Tg-4°C, Tg-2°C, Tg, Tg+2°C, Tg+4°C, Tg+6°C, Tg+8°C, Tg+10°C, Tg+12°C, Tg+14°C, Tg+16°C, Tg+18°C, Tg+20°C, Tg+22°C, Tg+24°C, Tg+26°C, Tg+28°C, Tg+30°C. In some examples, any two of these point values ​​can be used as end values ​​within the range, the same below.

[0047] Optionally, Tg-10°C ≤ the temperature of the heat treatment ≤ Tg+20°C.

[0048] Furthermore, Tg-5°C ≤ heat treatment temperature ≤ Tg+5°C.

[0049] In some of the examples, in the modification method of optical glass, the heat treatment time is 5 min~60 min.

[0050] It will be understood that the time for heat treatment includes but is not limited to 5 min, 8 min, 10 min, 12 min, 15 min, 18 min, 20 min, 22 min, 25 min, 28 min, 30 min, 32 min, 35 min, 38 min, 40 min, 42 min, 45 min, 48 min, 50 min, 52 min, 55 min, 58 min, and 60 min.

[0051] Optionally, the heat treatment time is 15 min to 35 min.

[0052] In some of the examples, in the method for modifying optical glass, in the natural cooling step, natural cooling is performed at 0°C to 30°C.

[0053] It can be understood that the temperature of natural cooling includes but is not limited to 0°C, 1°C, 2°C, 3°C, 4°C, 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, 11°C, 12°C, 13°C, 14°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, 30°C.

[0054] In some of these examples, in the method for modifying optical glass, natural cooling is carried out under room temperature conditions.

[0055] It can be understood that in some of these examples, the wind speed of air cooling > 0 m / s. If the wind speed is 0 m / s, it is equivalent to natural cooling; that is, 0 m / s < the wind speed of air cooling ≤ 1.5 m / s; further, the wind speed of air cooling includes but is not limited to 0.1 m / s, 0.2 m / s, 0.3 m / s, 0.4 m / s, 0.5 m / s, 0.6 m / s, 0.7 m / s, 0.8 m / s, 0.9 m / s, 1.0 m / s, 1.1 m / s, 1.2 m / s, 1.3 m / s, 1.4 m / s, 1.5 m / s.

[0056] In some of these examples, in the method for modifying optical glass, the wind speed of air cooling is ≤ 1 m / s.

[0057] In some of these examples, air cooling is carried out under room temperature conditions.

[0058] In some of these examples, in the method for modifying optical glass, the medium temperature used for air cooling is 0°C to 30°C.

[0059] It can be understood that the medium temperature used for air cooling refers to the temperature of the air used; further, the medium temperature used for air cooling includes but is not limited to 0°C, 1°C, 2°C, 3°C, 4°C, 5°C, 6°C, 7°C, 8°C, 9°C, 10°C, 11°C, 12°C, 13°C, 14°C, 15°C, 16°C, 17°C, 18°C, 19°C, 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, 30°C.

[0060] In some of these examples, in the method for modifying optical glass, the glass transition temperature of the optical glass is 650°C to 750°C.

[0061] In some of these examples, in the method for modifying optical glass, the optical glass includes lanthanide glass.

[0062] It is understandable that lanthanum glass is a crown glass containing the rare earth element lanthanum. The element lanthanum can increase the refractive index of the glass and reduce dispersion. Lanthanum glass with high refractive index and low dispersion is widely used in camera lenses and radar window plates. Lanthanum glass is often used to increase the speed of photographic lenses, and due to its low dispersion characteristics, it can better correct chromatic aberration and provide a clearer image.

[0063] Furthermore, the mass percentage of lanthanum element in the total mass of the optical glass is 40% - 50%.

[0064] It is understandable that the percentage of the mass of lanthanum element in the total mass of the optical glass includes but is not limited to 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%.

[0065] In some of these examples, in the method for modifying optical glass, the optical glass includes silicon dioxide.

[0066] Furthermore, the mass percentage of silicon dioxide in the total mass of the optical glass is 3% - 10%.

[0067] It is understandable that the percentage of the mass of silicon dioxide in the total mass of the optical glass includes but is not limited to 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%.

[0068] In some of these examples, in the method for modifying optical glass, by mass percentage, the optical glass includes the following components:

[0069] La2O3 40% - 50%, Y2O3 10% - 20%, Nb2O5 6% - 15%, ZrO2 5% - 15%, TiO2 3% - 10%, SiO2 3% - 10%, ZnO 2% - 9%, Ag2O 0.2% - 1%, Fe2O3 0.05% - 0.3%, SnO2 0.05% - 0.5%, HfO2 0.05% - 0.5%, CeO2 0.01% - 0.3%, Al2O3 0.02% - 0.5%, NiO 0.01% - 0.3%, Tb4O7 0.01% - 0.2%, MnO 0.01% - 0.2%, Sm2O3 0.01% - 0.2%, Sb2O3 0.01% - 0.2%, CaO 0.01% - 0.2% and K2O 0.001% - 0.05%.

[0070] It is understood that in optical glass, by mass percentage, La2O3 includes but is not limited to 40%, 42.5%, 45%, 47.5%, 50%; Y2O3 includes but is not limited to 10%, 12.5%, 15%, 17.5%, 20%; Nb2O5 includes but is not limited to 6%, 8.25%, 10.5%, 12.75%, 15%; ZrO2 includes but is not limited to 5%, 7.5%, 10%, 12.5%, 15%; TiO2 includes but is not limited to 3%, 5%, 6.5%, 8%, 10%; SiO2 includes but is not limited to 3%, 5%, 6.5%, 8%, 10%; ZnO includes but is not limited to 2%, 4%, 5.5%, 7%, 9%; Ag2O includes but is not limited to 0.2%, 0.4%, 0.6%, 0.8%, 1%; Fe2O3 includes but is not limited to 0.05%, 0.125%, 0.2%, 0.25%, 0.3%; SnO2 includes but is not limited to 0.05%, 0.2%, 0.3%, 0.4%, 0.5%; HfO2 includes but is not limited to 0.05%, 0.2%, 0.3%, 0.4%, 0.5%; CeO2 includes but is not limited to 0.01%, 0.1%, 0.15%, 0.2%, 0.3%; Al2O3 includes but is not limited to 0.02%, 0.15%, 0.25%, 0.35%, 0.5%; NiO includes but is not limited to 0.01%, 0.1%, 0.15%, 0.2%, 0.3%; Tb4O7 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; MnO includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; Sm2O3 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; Sb2O3 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; CaO includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; K2O includes but is not limited to 0.001%, 0.01%, 0.02%, 0.03%, 0.05%.

[0071] In some of these examples, in the method for modifying optical glass, by mass percentage, the optical glass further includes the following components:

[0072] RuO4 0.01% - 0.2%, SO3 0.01% - 0.2% and Tl2O3 0.01% - 0.2%.

[0073] It is understood that in the optical glass, by mass percentage, RuO4 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; SO3 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%; Tl2O3 includes but is not limited to 0.01%, 0.06%, 0.1%, 0.15%, 0.2%.

[0074] In some of these examples, in the method for modifying the optical glass, by mass percentage, the optical glass is composed of the following components:

[0075] La2O3 40% - 50%, Y2O3 10% - 20%, Nb2O5 6% - 15%, ZrO2 5% - 15%, TiO2 3% - 10%, SiO2 3% - 10%, ZnO 2% - 9%, Ag2O 0.2% - 1%, Fe2O3 0.05% - 0.3%, SnO2 0.05% - 0.5%, HfO2 0.05% - 0.5%, CeO2 0.01% - 0.3%, Al2O3 0.02% - 0.5%, NiO 0.01% - 0.3%, Tb4O7 0.01% - 0.2%, MnO 0.01% - 0.2%, Sm2O3 0.01% - 0.2%, Sb2O3 0.01% - 0.2%, CaO 0.01% - 0.2%, K2O 0.001% - 0.05%, RuO4 0.01% - 0.2%, SO3 0.01% - 0.2% and Tl2O3 0.01% - 0.2%. It is understood that the H-ZLAF70B lanthanum glass of Xinhua Optoelectronics is composed of these components.

[0076] In some other examples, in the method for modifying the optical glass, by mass percentage, the optical glass further includes the following components:

[0077] Ta2O5 1% - 8%, BaO 0.01% - 0.5% and Yb2O3 0.01% - 0.5%.

[0078] It is understood that in the optical glass, by mass percentage, Ta2O5 includes but is not limited to 1%, 3%, 4.5%, 6%, 8%; BaO includes but is not limited to 0.01%, 0.15%, 0.25%, 0.35%, 0.5%; Yb2O3 includes but is not limited to 0.01%, 0.15%, 0.25%, 0.35%, 0.5%.

[0079] In some of these examples, in the method for modifying the optical glass, by mass percentage, the optical glass is composed of the following components:

[0080] La2O3 40% - 50%, Y2O3 10% - 20%, Nb2O5 6% - 15%, ZrO2 5% - 15%, TiO2 3% - 10%, SiO2 3% - 10%, ZnO 2% - 9%, Ag2O 0.2% - 1%, Fe2O3 0.05% - 0.3%, SnO2 0.05% - 0.5%, HfO2 0.05% - 0.5%, CeO2 0.01% - 0.3%, Al2O3 0.02% - 0.5%, NiO 0.01% - 0.3%, Tb4O7 0.01% - 0.2%, MnO 0.01% - 0.2%, Sm2O3 0.01% - 0.2%, Sb2O3 0.01% - 0.2%, CaO 0.01% - 0.2%, K2O 0.001% - 0.05% and Ta2O5 1% - 8%, BaO 0.01% - 0.5%, Yb2O3 0.01% - 0.5%. It can be understood that GBE's H-ZLaF4L lanthanum glass is composed of this composition.

[0081] It can be understood that the method for modifying optical glass provided by this application is applicable to optical glasses of various shapes such as irregular and regular shapes. For example, in some of these examples, before the heat treatment step, the optical glass substrate (which can be obtained by self-making or commercially available) is processed into the required shape, and the surface is polished to meet the optical requirements, and then heat treatment is carried out. Further, the method of processing into the required shape includes but is not limited to CNC (Computer Numerical Control). Further, the polishing treatment includes one of semi-polishing and full-polishing.

[0082] In some of these examples, the optical glass substrate includes but is not limited to at least one of H-ZLAF75C (Chengdu Guangming), H-ZLAF70B (Xinhua Optoelectronics) and H-ZLaF4L (GBE), etc.

[0083] H-ZLAF75C of Chengdu Guangming, H-ZLAF70B of Xinhua Optoelectronics and H-ZLaF4L of GBE belong to lanthanum glass and cannot pass the ice-water test before modification. After being treated with the method for modifying optical glass provided by this application, it can pass the ice-water test and has good anti-ice-water impact performance.

[0084] One embodiment of this application provides a modified optical glass, which is prepared by the above method for modifying optical glass.

[0085] The modified optical glass provided by this application has good anti-ice-water impact performance.

[0086] One embodiment of this application provides a radar window sheet, which includes the above modified optical glass.

[0087] The radar window sheet of the present application includes the modified optical glass provided by the present application, and thus has at least the same advantages as the above-mentioned modified optical glass, and has good anti-ice and water impact performance.

[0088] An embodiment of the present application provides an optical device, including the above-mentioned modified optical glass or the above-mentioned radar window sheet.

[0089] The optical device of the present application includes the modified optical glass or the radar window sheet provided by the present application, and thus has at least the same advantages as the above-mentioned modified optical glass or radar window sheet.

[0090] It can be understood that the optical device includes but is not limited to aerospace equipment such as autonomous vehicles, robots, airplanes, satellites, etc.

[0091] The following further describes the present application in detail in conjunction with specific embodiments, but the embodiments of the present application are not limited thereto.

[0092] Example 1

[0093] The optical glass substrate (lanthanum glass from Chengdu Guangming, with Tg of 672 °C) is processed by CNC to the required 3D shape, the surface is fully polished, and heat treatment is carried out by heating in an oven. The heating temperature is set at 670 °C and the heating time is 25 min; the heat-treated glass is taken out for cooling, and the cooling method is air cooling with a wind speed of 1 m / s to obtain the modified optical glass.

[0094] Example 2

[0095] It is basically the same as Example 1, the difference is that the cooling method is natural cooling at room temperature (0 °C to 30 °C).

[0096] Comparative Example 1

[0097] The optical glass substrate (lanthanum glass from Chengdu Guangming, with Tg of 672 °C) is not subjected to heat treatment.

[0098] Comparative Example 2

[0099] It is basically the same as Example 1, the difference is that the cooling method is air cooling with a wind speed of 3 m / s.

[0100] Comparative Example 3

[0101] It is basically the same as Example 1, the difference is that the cooling method is air cooling with a wind speed of 4 m / s.

[0102] Comparative Example 4

[0103] It is basically the same as Example 1, the difference is that the cooling method is air cooling with a wind speed of 5 m / s.

[0104] Example 3

[0105] The optical glass substrate (Gobik's lanthanum glass, with Tg being 696 °C) is processed by CNC to the required 3D shape, the surface is semi-polished, and then heat treatment is carried out by heating in an oven. The heating temperature is set at 696 °C and the heating time is 25 min; the heat-treated glass is taken out for cooling, and the cooling method is air cooling with a wind speed of 1 m / s, thus obtaining the modified optical glass.

[0106] Example 4

[0107] It is basically the same as Example 3, the difference is that the cooling method is natural cooling at room temperature (0 °C to 30 °C).

[0108] Comparative Example 5

[0109] The optical glass substrate (Gobik's lanthanum glass, with Tg being 696 °C) is not subjected to heat treatment.

[0110] Comparative Example 6

[0111] It is basically the same as Example 3, the difference is that the cooling method is air cooling with a wind speed of 2 m / s.

[0112] Comparative Example 7

[0113] It is basically the same as Example 3, the difference is that the cooling method is air cooling with a wind speed of 3 m / s.

[0114] Comparative Example 8

[0115] It is basically the same as Example 3, the difference is that the heat treatment temperature is 670 °C.

[0116] Comparative Example 9

[0117] It is basically the same as Example 4, the difference is that the heat treatment temperature is 670 °C.

[0118] Comparative Example 10

[0119] The optical glass substrate (Gobik's lanthanum glass, with Tg being 696 °C) is processed by CNC to the required 3D shape, the surface is semi-polished, and then heat treatment is carried out by heating in an oven. The heating temperature is set at 696 °C and the heating time is 25 min; the heat-treated glass is cooled in the furnace.

[0120] Comparative Example 11

[0121] It is basically the same as Example 4, the difference is that the heat treatment temperature is 680 °C.

[0122] The modified optical glasses prepared in each example and comparative example were tested by ice-water test. GB / T 28046.4-2011 "Environmental Conditions and Tests for Electrical and Electronic Equipment of Road Vehicles": After the glass parts were kept at 105 °C for 30 min, within 20 s, deionized water at 0-4 °C was sprayed at a water flow rate of (3 L-4 L) / 3 h, and the distance between the nozzle and the test piece was 300 mm-350 mm. After cooling, continue to keep at 105 °C for 30 min and cycle 100 times.

[0123] The modification method parameters and test conditions of the lanthanum glasses of Examples 1-2 and Comparative Examples 1-4 from Chengdu Guangming are shown in Table 1.

[0124] Table 1

[0125]

[0126] The product situation of the modified optical glass prepared in Example 1 after ice-water test is as Figure 1 shown, and the product situation of the optical glass substrate (lanthanum glass from Chengdu Guangming) provided in Comparative Example 1 after ice-water test is as Figure 2 shown.

[0127] The modification method parameters and test conditions of the lanthanum glasses of Examples 3-4 and Comparative Examples 5-9 from Gobik are shown in Table 2.

[0128] Table 2

[0129]

[0130] From Table 1-Table 2 and Figures 1 - 2 it can be seen that the optical glass substrate without heat treatment cannot pass the ice-water test, and the material cracks (Comparative Examples 1 and 5); when air cooling is carried out at an unreasonable wind speed, "self-explosion" will occur when it exceeds the material's tolerance range (Comparative Examples 2-4 and Comparative Examples 6-7); when natural cooling or air cooling is carried out after heat treatment at an unreasonable temperature, cracking will also occur (Comparative Examples 8-9, 11); when furnace cooling is used, cracking occurs during the ice-water test (Comparative Example 10); that is, for the modification method of the optical glass provided in this application, heat treatment needs to be carried out at a suitable temperature, and then natural cooling at a suitable temperature or air cooling at a suitable wind speed is required to achieve no cracking during the cooling process and no cracking during the ice-water test, effectively improving the anti-ice-water impact performance of the optical glass.

[0131] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0132] The above-described embodiments merely represent several implementation manners of the present application, facilitating a specific and detailed understanding of the technical solution of the present application, but should not be construed as a limitation on the protection scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all fall within the protection scope of the present application. It should be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments based on the technical solution provided by the present application are all within the protection scope of the appended claims of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the content of the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A method for modifying optical glass, characterized in that, Comprising the following steps: After heat-treating the optical glass, it is naturally cooled at ≤30°C or air-cooled; the glass transition temperature of the optical glass is Tg, the temperature of the heat treatment is ≥Tg - 10°C, and the wind speed of the air-cooling is ≤1.5 m / s.

2. The modification method of the optical glass according to claim 1, wherein, The temperature of the heat treatment is ≤Tg + 30°C.

3. The modification method of the optical glass according to claim 1, characterized in that, The wind speed of the air-cooling is ≤1 m / s.

4. The modification method of the optical glass according to any one of claims 1 to 3, characterized in that, In the step of natural cooling, it is naturally cooled at 0°C to 30°C.

5. The modification method of the optical glass according to any one of claims 1 to 3, characterized in that, The medium temperature used for the air-cooling is 0°C to 30°C.

6. The modification method of the optical glass according to any one of claims 1 to 3, characterized in that, The time of the heat treatment is 5 min to 60 min.

7. The modification method of the optical glass according to any one of claims 1 to 3, characterized in that, The optical glass includes lanthanum series glass; And / or, the optical glass includes silicon dioxide, and the mass of the silicon dioxide accounts for 3% to 10% of the total mass of the optical glass.

8. The modification method of the optical glass according to claim 7, wherein By mass percentage, the optical glass comprises the following components: La2O3 40% - 50%, Y2O3 10% - 20%, Nb2O5 6% - 15%, ZrO2 5% - 15%, TiO2 3% - 10%, SiO2 3% - 10%, ZnO 2% - 9%, Ag2O 0.2% - 1%, Fe2O3 0.05% - 0.3%, SnO2 0.05% - 0.5%, HfO2 0.05% - 0.5%, CeO2 0.01% - 0.3%, Al2O3 0.02% - 0.5%, NiO 0.01% - 0.3%, Tb4O7 0.01% - 0.2%, MnO 0.01% - 0.2%, Sm2O3 0.01% - 0.2%, Sb2O3 0.01% - 0.2%, CaO 0.01% - 0.2% and K2O 0.001% - 0.05%.

9. A modified optical glass, characterized in that, Prepared by using the modification method of the optical glass according to any one of claims 1 to 8.

10. An optical device, characterized in that, Comprising the modified optical glass according to claim 9.

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