阅读说明：本技术 一种用于投影镜头玻璃的制备方法 (Preparation method of projection lens glass ) 是由 连俊林 王达 于 2021-08-24 设计创作，主要内容包括：本发明属于特种玻璃加工技术领域,尤其为一种用于投影镜头玻璃的制备方法,采用了纳米TiO-(2)颗粒并通过激光辐照处理在玻璃表面镀膜,由于辐照时间短,最大程度上维持玻璃的结构,避免了玻璃表面结构改变对可见光透过率的影响,使得制备的见光投影玻璃保持可见光透过率的同时,屏蔽了紫外光和蓝光,能够获得高质量的用于投影镜头玻璃。由于二氧化钛是一种惰性物质,无毒无害,也不会在人体蓄积,不会对人体产生危害,所以制备的用于投影镜头玻璃环保性较好,且所采用的激光辐照技术制备过程清洁、无污染,不需要引入其他工艺就可以使玻璃具有良好的可见光透过性能和蓝紫光屏蔽性能,并且所需反应时间短,制备效率高。(The invention belongs to the technical field of special glass processing, and particularly relates to a preparation method of projection lens glass, which adopts nano TiO 2 The particles are coated on the surface of the glass through laser irradiation treatment, and the irradiation time is short, so that the structure of the glass is maintained to the greatest extent, the influence of the change of the structure of the surface of the glass on the visible light transmittance is avoided, the prepared visible light projection glass can keep the visible light transmittance, the ultraviolet light and the blue light are shielded, and the high-quality projection lens glass can be obtained. Because titanium dioxide is an inert substance, is nontoxic and harmless, can not be accumulated in a human body, and can not generate harm to the human body, the prepared glass for the projection lens has better environmental protection performance, the preparation process of the adopted laser irradiation technology is clean and pollution-free, the glass can have good visible light transmission performance and blue-violet light shielding performance without introducing other processes, the required reaction time is short, and the preparation efficiency is high.)

1. A preparation method for projection lens glass is characterized by comprising the following steps:

(1) to nanometer TiO₂Cleaning the particle surface;

(2) preheating glass and cleaning the surface of the glass;

(3) cleaning the treated TiO₂The particles are tabletted on the glass and ensure the tabletted TiO₂The surface flatness of the particles;

(4) laser treated TiO for tabletting on glass₂Carrying out irradiation treatment on the particles;

(5) subjecting the irradiated TiO in the step (4)₂The particles are mixed uniformly again;

repeating the steps (3), (4) and (5) for a plurality of times until the whole surface of the glass is uniformly discolored.

2. The production method for a projection lens glass according to claim 1, characterized in that: TiO used₂The crystal form of the particles is anatase crystal form or rutile crystal form.

3. The production method for a projection lens glass according to claim 1, characterized in that: TiO used₂The particle size of the particles is 5nm-5000 nm.

4. The production method for a projection lens glass according to claim 1, characterized in that: the light source wavelength of the laser is 300nm-1700 nm; the light source power of the laser is 1W-100W; the pulse frequency of the laser is 10 Hz-10000 Hz; the laser is a fast laser with the pulse width of 1 picosecond-1000 nanoseconds.

5. The production method for a projection lens glass according to claim 1, characterized in that: in the step (2), the glass surface is cleaned with alcohol and cyclohexane, respectively.

6. The method of claim 1, wherein the step of preparing the glass for a projection lens is carried out on TiO by₂Pre-modification of the granules:

(1.1) removal of TiO₂Surface impurities of the particles;

(1.2) treating the treated TiO₂Tabletting the granules to obtain the tabletted TiO₂The surface of the particles is smooth;

(1.3) tabletting of TiO with a fast laser having a pulse width of picosecond or nanosecond₂Irradiating the particles for 3-10 seconds to obtain TiO film with in-situ grown TiO film on the surface₂Particles;

(1.4) treating the TiO treated in the step (1.3)₂After the particles are mixed uniformly again, the step (1.2) and the step (1.3) are repeated until TiO₂The particles were uniformly blue.

7. The production method for a projection lens glass according to claim 1, characterized in that: in the step (4), the duration of the irradiation treatment is 3 to 10 seconds.

8. The production method for a projection lens glass according to claim 1, characterized in that: repeating the steps (3), (4) and (5)6-10 times.

9. The production method for a projection lens glass according to claim 1, characterized in that: in the step (1), nano TiO is treated₂The preheating treatment of the particles is carried out in a muffle furnace, and the temperature range of the preheating treatment is 200-300 ℃; or, under the protection of inert gas in a tube furnace, the nano TiO is treated₂Preheating the particles;

in the step (2), the preheating treatment of the glass is carried out in a muffle furnace, and the temperature range of the preheating treatment is 100-200 ℃; alternatively, the glass is preheated in a tube furnace under the protection of inert gas.

Technical Field

The invention belongs to the technical field of special glass processing, and particularly relates to a preparation method of projection lens glass.

Background

Light with the wavelength between 400-500nm is blue light, the shorter the wavelength is, the higher the energy is, therefore, the blue light with the wavelength of 400-450nm is generally called as short-wave blue light which is harmful to human eyes, for example, research by Chongqing et al (spectroscopy and spectrum analysis, 2014,34,316-321) shows that the short-wave blue light exceeding a certain threshold value can kill retinal pigment cells to cause macular degeneration after being irradiated on the eyes for a certain time, and the blue light band is defined as harmful blue light; in addition, research by Zhao Jie Jun et al (report on illumination engineering, 2015,1,84-87) shows that various display screens including CRT display screens, LED display screens, QLED display screens and OLED display screens, as well as blue light bands of laser light sources and the like can penetrate through cornea and crystalline lens to reach retina, and excessive blue light contact can cause macula lutea pathological changes of retina, aggravate chromatic aberration and visual blurring, and destroy eyesight. Especially with the great popularity of mobile multimedia devices and the long-term use by users, the harmfulness of blue light is magnified.

Because the harmfulness of the 400-450nm blue light band requires high cut-off for the harmful band, at present, the principle of shielding blue light is mainly reflection or absorption, and the absorption is the mainstream technical means at present because the preparation process of the reflection-type screen is complex.

The method for absorbing blue light mainly realizes the 'conversion' of light, and the basic principle is that a film material for absorbing blue light is deposited on a display screen or a filter substrate, so that the effects of absorbing and converting blue light are achieved. For a projection apparatus whose optical path mainly includes glass, the main process at present is to deposit a rare earth light conversion material on a glass substrate (Shipengcheng, etc., research on synthesis and fluorescence properties of rare earth light conversion glass 2006), and when blue light is incident into the glass, the blue light can be converted into light by corresponding conversion and luminescence. So far, materials capable of absorbing blue light are mainly some fluorescent materials, the main component is composite metal oxide, the preparation is difficult, and the film forming performance is unknown, so the application of the method is greatly limited.

The other strategy is a semiconductor light absorption method, intrinsic absorption is the most important semiconductor light absorption method, photons with certain energy act on a semiconductor, and valence band electrons absorb the energy and then transfer to a higher energy level (Xiyingpeng, et al, inorganic chemistry report, 2017,33, 177-. At present, organic semiconductor absorbents such as ethyl salicylate and azo compounds are mainly used, but the absorption range of the organic semiconductor absorbents is wide, the pertinence is not strong, the organic semiconductor absorbents are easy to age and cause short service life, and some organic semiconductor absorbents also have certain toxicity, so that the organic semiconductor absorbents have great significance for the research of green, harmless, simple and efficient inorganic blue light absorption film layers.

Disclosure of Invention

The invention aims to provide a preparation method of projection lens glass, and solves the technical problems that in the prior art, glass for filtering blue light on a display screen, a projection instrument and other equipment has weak absorption pertinence to the blue light, short service life and no environmental protection.

In order to solve the technical problems, the invention adopts the following technical scheme:

the preparation method for the projection lens glass comprises the following steps:

(1) to nanometer TiO₂Cleaning the particle surface;

(2) preheating glass and cleaning the surface of the glass;

(3) cleaning the treated TiO₂The particles are tabletted on the glass and ensure the tabletted TiO₂The surface flatness of the particles;

(4) laser treated TiO for tabletting on glass₂Carrying out irradiation treatment on the particles;

(5) subjecting the irradiated TiO in the step (4)₂The particles are mixed uniformly again;

repeating the steps (3), (4) and (5) for a plurality of times until the whole surface of the glass is uniformly discolored.

Preferably, TiO is used₂The crystal form of the particles is anatase crystal form or rutile crystal form.

Preferably, TiO is used₂The particle size of the particles is 5nm-5000 nm.

Preferably, the light source wavelength of the laser is 300nm-1700 nm; the light source power of the laser is 1W-100W; the pulse frequency of the laser is 10 Hz-10000 Hz; the laser is a fast laser with the pulse width of 1 picosecond-1000 nanoseconds.

Preferably, in the step (2), the glass surface is cleaned with alcohol and cyclohexane, respectively.

Preferably, 6. use according to claim 1 forThe preparation method of the projection lens glass is characterized in that the TiO is prepared by the following steps₂Pre-modification of the granules:

(1.1) removal of TiO₂Surface impurities of the particles;

(1.2) treating the treated TiO₂Tabletting the granules to obtain the tabletted TiO₂The surface of the particles is smooth;

(1.3) tabletting of TiO with a fast laser having a pulse width of picosecond or nanosecond₂Irradiating the particles for 3-10 seconds to obtain TiO film with in-situ grown TiO film on the surface₂Particles;

(1.4) treating the TiO treated in the step (1.3)₂After the particles are mixed uniformly again, the step (1.2) and the step (1.3) are repeated until TiO₂The particles were uniformly blue.

Preferably, in the step (4), the irradiation treatment is performed for 3 to 10 seconds.

Preferably, steps (3), (4) and (5) are repeated 6 to 10 times.

Preferably, in the step (1), nano TiO is treated₂The preheating treatment of the particles is carried out in a muffle furnace, and the temperature range of the preheating treatment is 200-300 ℃; or, under the protection of inert gas in a tube furnace, the nano TiO is treated₂Preheating the particles;

in the step (2), the preheating treatment of the glass is carried out in a muffle furnace, and the temperature range of the preheating treatment is 100-200 ℃; alternatively, the glass is preheated in a tube furnace under the protection of inert gas.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention relates to a method for preparing projection lens glass, which adopts nano TiO₂The particles are the auxiliary material, the film is coated on the surface of the glass through laser irradiation treatment, and the irradiation time is short, so that the structure of the glass is maintained to the maximum extent, the influence of the change of the surface structure of the glass on the visible light transmittance is avoided, the prepared visible light projection glass can shield ultraviolet light and blue light while maintaining the visible light transmittance, and high-quality projection lens glass can be obtained.

2. Because titanium dioxide is an inert substance, is nontoxic and harmless, can not be accumulated in a human body, and can not generate harm to the human body, the prepared glass for the projection lens has better environmental protection performance, the preparation process of the adopted laser irradiation technology is clean and pollution-free, the glass can have good visible light transmission performance and blue-violet light shielding performance without introducing other processes, the required reaction time is short, and the preparation efficiency is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of laser irradiation in an embodiment of a method for manufacturing projection lens glass according to the present invention.

Fig. 2 is a comparison graph of optical photographs of a glass sample with uniform discoloration after laser irradiation and an original glass sample in an embodiment of a method for manufacturing projection lens glass according to the present invention.

Fig. 3 is a graph comparing the ultraviolet-blue light absorption rate test results of a glass sample which is uniformly discolored after laser irradiation and an original glass sample in an embodiment of the method for manufacturing projection lens glass according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

a preparation method for projection lens glass comprises the following steps:

(1) to nanometer TiO₂The surface of the particles is cleaned.

In this step, Ti is usedO₂The crystal form of the particles is anatase crystal form, and adopted TiO₂The particle diameter of the particles is 5nm, and the particles are nano TiO₂The particles are preheated in a muffle furnace at 200 degrees Celsius to clean the surfaces, e.g., preheating removes TiO₂Moisture on the surface of the particles and the like are vaporized by heat.

TiO used in this step₂The granules were pre-modified by the following steps: (1.1) removal of TiO₂Surface impurities of the particles; (1.2) treating the treated TiO₂Tabletting the granules to obtain the tabletted TiO₂The surface of the particles is smooth; (1.3) tabletting of TiO with a fast laser having a pulse width of picosecond or nanosecond₂Irradiating the particles for 3-10 seconds to obtain TiO film with in-situ grown TiO film on the surface₂Particles; (1.4) treating the TiO treated in the step (1.3)₂After the particles are mixed uniformly again, the step (1.2) and the step (1.3) are repeated until TiO₂The particles were uniformly blue. Detailed description of TiO₂The method for improving the particles can be referred to Chinese patent document with patent number ZL201811338012.X previously filed by the applicant of the invention.

(2) The glass is pre-heated and its surface cleaned.

In the step, the glass is preheated in a muffle furnace at 100 ℃, and impurities such as water on the surface of the glass, which are gasified by heat, can be removed by the preheating treatment; when the surface of the glass is cleaned, the surface of the glass is wiped and cleaned by alcohol and cyclohexane respectively, and the glass is used after the surface of the glass is dried.

(3) Cleaning the treated TiO₂The particles are tabletted on glass and the tabletted TiO is guaranteed₂Surface flatness of the particles.

As shown in FIG. 1, in this step, the TiO after the preheating treatment is treated₂The particles are pressed into a sheet on glass, quartz glass being used in the present example, and any type of glass may be used in other examples. TiO 2₂Tabletting the granules on a quartz glass substrate, TiO₂The upper layer of the thin granules is pressed glass.

(4) Using laser to align glassTiO treated by tabletting on glass₂The particles are subjected to irradiation treatment.

In the step, the light source wavelength of the laser is 300nm, the light source power is 1W, the light source pulse width is 1 picosecond, and the light source pulse frequency of the laser is 10 Hz; the irradiation treatment time is 5 seconds, and the color of the glass surface is slightly deepened and grayed after one-time irradiation.

Here, the laser irradiation time is varied according to the laser wavelength, the selected laser power, and TiO₂The particle size of the particles is selected in such a way that, in principle, the shorter the laser wavelength, the higher the laser power, the TiO₂The smaller the particle size, the shorter the laser irradiation time. In addition, as shown in FIG. 1, in this step, the laser light source reaches the TiO processed by the tablet after being reflected by two reflectors₂The purpose of the particles after twice reflection is to focus laser and ensure the brightness and energy of light spots.

(5) Subjecting the irradiated TiO in the step (4)₂The particles are mixed again uniformly.

The purpose of remixing in this step is to prepare for repeating step (3), step (4), and step (5). In this example, the steps (3), (4) and (5) were repeated 6 times in total to obtain glass with uniform surface discoloration.

Here, for TiO₂The number of times the glass of the particles is repeatedly irradiated is dependent on the laser wavelength, the selected laser power and the TiO₂The influence of several factors, the particle size of the particles, is in principle shorter laser wavelengths, higher laser powers selected, TiO₂The smaller the particle size of the particles, the smaller the TiO₂The fewer the number of times the particles are repeatedly irradiated.

After laser irradiation, extremely thin TiO can be formed on glass₂Thin film of and TiO₂Strong bonding effect is generated between molecules and glass, and TiO is used in normal temperature environment₂The film can not fall off on the glass, and TiO₂The film functions to filter out blue light.

Example 2:

a preparation method for projection lens glass comprises the following steps:

(1) to nanometer TiO₂The surface of the particles is cleaned.

In this step, TiO is used₂The crystal form of the particles is rutile crystal form, and the crystal form is preliminarily aligned with TiO₂Modified by treatment of the particles with TiO₂The particle diameter of the particles is 100nm, and the particles are nano TiO₂The particles are preheated in a muffle furnace at 250 ℃ to clean the surfaces.

(2) The glass is pre-heated and its surface cleaned.

In the step, the glass is preheated in a muffle furnace at 150 ℃; when the surface of the glass is cleaned, the surface of the glass is wiped and cleaned by alcohol and cyclohexane respectively, and the glass is used after the surface of the glass is dried.

(3) Cleaning the treated TiO₂The particles are tabletted on glass and the tabletted TiO is guaranteed₂Surface flatness of the particles.

(4) Laser treated TiO for tabletting on glass₂The particles are subjected to irradiation treatment.

In the step, the light source wavelength of the laser is 1064nm, the light source power is 1W, the light source pulse width is 10 nanoseconds, and the light source pulse frequency of the laser is 1000 Hz; and the duration of the irradiation treatment was 3 seconds.

(5) Subjecting the irradiated TiO in the step (4)₂The particles are mixed again uniformly.

The purpose of remixing in this step is to prepare for repeating step (3), step (4), and step (5). In this example, the steps (3), (4) and (5) were repeated 8 times to obtain glass with uniform surface discoloration.

Example 3:

a preparation method for projection lens glass comprises the following steps:

(1) to nanometer TiO₂The surface of the particles is cleaned.

In this step, TiO is used₂GranulesThe crystal form of (A) is rutile crystal form, and adopted TiO₂The particle diameter of the particles is 5000nm, and the particles are nano TiO₂The particles were preheated in a muffle furnace at 300 degrees celsius to clean the surfaces.

(2) The glass is pre-heated and its surface cleaned.

In the step, the glass is preheated in a muffle furnace at 200 ℃; when the surface of the glass is cleaned, the surface of the glass is wiped and cleaned by alcohol and cyclohexane respectively, and the glass is used after the surface of the glass is dried.

(3) Cleaning the treated TiO₂The particles are tabletted on glass and the tabletted TiO is guaranteed₂Surface flatness of the particles.

(4) Laser treated TiO for tabletting on glass₂The particles are subjected to irradiation treatment.

In the step, the light source wavelength of the laser is 1700nm, the light source power is 100W, the light source pulse width is 1000 nanoseconds, and the light source pulse frequency of the laser is 1000 Hz; and the duration of the irradiation treatment was 10 seconds.

(5) Subjecting the irradiated TiO in the step (4)₂The particles are mixed again uniformly.

The purpose of remixing in this step is to prepare for repeating step (3), step (4), and step (5). In this example, the steps (3), (4) and (5) were repeated 10 times in total to obtain glass with uniform surface discoloration.

Example 4:

a preparation method for projection lens glass comprises the following steps:

(1) to nanometer TiO₂The surface of the particles is cleaned.

In this step, TiO is used₂The crystal form of the particles is rutile crystal form, and adopted TiO₂The particle diameter of the particles is 100nm, and the particles are nano TiO₂The particles are preheated in a muffle furnace at 200 degrees celsius to clean the surfaces.

(2) The glass is pre-heated and its surface cleaned.

In the step, the glass is preheated in a muffle furnace at 150 ℃; when the surface of the glass is cleaned, the surface of the glass is wiped and cleaned by alcohol and cyclohexane respectively, and the glass is used after the surface of the glass is dried.

(3) Cleaning the treated TiO₂The particles are tabletted on glass and the tabletted TiO is guaranteed₂Surface flatness of the particles.

(4) Laser treated TiO for tabletting on glass₂The particles are subjected to irradiation treatment.

In the step, the light source wavelength of the laser is 532nm, the light source power is 1W, the light source pulse width is 1 nanosecond, and the light source pulse frequency of the laser is 100 Hz; and the duration of the irradiation treatment was 5 seconds.

(5) Subjecting the irradiated TiO in the step (4)₂The particles are mixed again uniformly.

The purpose of remixing in this step is to prepare for repeating step (3), step (4), and step (5). In this example, the steps (3), (4) and (5) were repeated 8 times to obtain glass with uniform surface discoloration.

Example 5:

a preparation method for projection lens glass comprises the following steps:

(1) to nanometer TiO₂The surface of the particles is cleaned.

In this step, TiO is used₂The crystal form of the particles is rutile crystal form, and adopted TiO₂The particle diameter of the particles is 500nm, and the particles are nano TiO₂The particles are preheated in a muffle furnace at 200 degrees celsius to clean the surfaces.

(2) The glass is pre-heated and its surface cleaned.

In the step, the glass is preheated in a muffle furnace at 150 ℃; when the surface of the glass is cleaned, the surface of the glass is wiped and cleaned by alcohol and cyclohexane respectively, and the glass is used after the surface of the glass is dried.

(3) Cleaning the treated TiO₂The particles are tabletted on glass and the tabletted TiO is guaranteed₂Surface flatness of the particles.

(4) Laser treated TiO for tabletting on glass₂The particles are subjected to irradiation treatment.

In the step, the light source wavelength of the laser is 1064nm, the light source power is 1W, the light source pulse width is 1 nanosecond, and the light source pulse frequency of the laser is 1000 Hz; and the duration of the irradiation treatment was 8 seconds.

(5) Subjecting the irradiated TiO in the step (4)₂The particles are mixed again uniformly.

The purpose of remixing in this step is to prepare for repeating step (3), step (4), and step (5). In this example, the steps (3), (4) and (5) were repeated 6 times in total to obtain glass with uniform surface discoloration.

The glass for the projection lens prepared by the embodiment has the function of filtering blue light and has good visible light transmittance. Taking the above example 1 as an example, the method for preparing the projection lens glass adopts nano TiO₂Particulate adjuvant, on the one hand, TiO₂The particles have strong adhesive force, are not easy to chemically change and have good color durability in the air environment, so the nano TiO is adopted₂The particles are coated on the surface of the glass in a laser irradiation mode, so that the film is firmly adhered to the glass, and the service life is long; on the other hand, TiO₂The direct band gap wide band gap semiconductor material has excellent performance, the band gap width of the direct band gap wide band gap semiconductor material reaches 3.0-3.2 eV, ultraviolet light can be effectively absorbed, and TiO is adjusted after laser irradiation treatment₂The surface structure further has excellent absorption performance to blue light at a wavelength range of 400-450nm, and the TiO is used for absorbing blue light₂The material film is prepared on a glass substrate, and can realize the absorption of harmful blue light of various multimedia devices and projection instrument display screens.

In addition, in the preparation method for the projection lens glass, the reaction time of laser irradiation is short, the damage of the surface structure of the glass can not be caused, so that the reduction of the visible light transmittance of the glass can not be caused, the visible light transmittance of the glass can be kept, and the ultraviolet light and the blue light can be shielded, so that the high-quality projection lens glass can be obtained.

The properties of the glass for a projection lens prepared in the above example 1 are further described with reference to fig. 2 and 3: as shown in fig. 2, the right side is the glass for the projection lens after laser irradiation, which has a darker color and a uniform color, and shows that blue light and violet light can be filtered; as shown in fig. 3, the position of the ordinate of the projection lens glass at 400-450nm after irradiation treatment is higher, which indicates that the projection lens glass has strong absorption performance for ultraviolet-blue light in this wavelength band, and the absorption performance of the projection lens glass for ultraviolet-blue light after irradiation is significantly enhanced compared with the glass before laser irradiation.

In addition, because the titanium dioxide is an inert substance, is nontoxic and harmless, can not be accumulated in the human body, can not cause harm to the human body, and has better environmental protection property.

It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.