CN110723904B - Blue glass, IR cut filter, camera assembly, electronic equipment - Google Patents

Abstract

The application discloses blue glass, infrared cut-off filter, camera subassembly and electronic equipment. Specifically, the present application proposes a blue glass, which includes, based on the total mass of the blue glass: 60.1-75 wt% of phosphorus pentoxide, and 0.5-2.5 wt% of copper oxide. Therefore, when the component content of the blue glass is within the range, the center cut-off wavelength of the blue glass is longer, and when the blue glass is used in an infrared cut-off filter, infrared light can be cut off better, the absorption of red light in visible light is less, the transmittance of the visible light is higher, and the service performance is good.

Description

Blue glass, IR cut filter, camera assembly, electronic equipment

technical field

The present application relates to the field of materials, in particular, to blue glass, infrared cut-off filters, camera assemblies, and electronic equipment.

Background technique

The current camera components used in electronic equipment (such as mobile phone camera components, computer camera components, etc.) and electronic products such as digital cameras usually use charge-coupled device image sensors (CCD) or complementary metal oxide semiconductor image sensors (CMOS). For image sensing, the image sensor (Sensor) converts the light transmitted from the lens into an electrical signal, and then converts it into a digital signal through the internal DA. After a series of amplification processing and storage processing, the digital signal is transmitted to the screen. form an image. In addition to visible light, the light transmitted from the lens will also contain some infrared light. Although this part of the infrared light is invisible to the human eye, it can be sensed by the above-mentioned image sensor. After a series of conversions, this part of the infrared light will be in the A virtual image is formed on the finally formed image, so that the image seen by the human eye is inconsistent with the image sensed by the image sensor, which affects the shooting performance of the camera assembly. At present, an infrared cut-off filter is usually set between the lens and the image sensor. The infrared cut-off filter can cut off infrared light and transmit visible light. Therefore, it can prevent infrared light from forming a virtual image on the image sensor and improve infrared light sensitivity. Imaging effects, and does not affect visible light imaging. At present, because the blue glass material itself can selectively absorb infrared light to achieve the infrared cutoff effect, and the blue glass material has the characteristics of good imaging and anti-glare, more and more camera products choose the blue glass filter as the infrared cutoff filter.

However, the current blue glass, infrared cut filter, camera assembly, and electronic equipment still need to be improved.

SUMMARY OF THE INVENTION

This application is made based on the inventor's findings and knowledge of the following facts and problems:

The current blue glass filter used in the camera assembly has the problem that the infrared cut-off effect and the visible light transmittance cannot be taken into account, and the product is light, thin and miniaturized. The infrared cutoff effect of the blue glass filter is greatly affected by its thickness. When the thickness of the blue glass filter is large, for example, the commonly used blue glass filter with a thickness of about 1.2mm can achieve a better infrared cutoff effect. , but an excessively thick thickness will also reduce the transmittance of the visible light portion, and is also not conducive to the development of miniaturization of imaging devices. The current blue glass infrared cut filter embedded in front of the image sensor is generally only 0.1-0.3mm thick. Due to the thinning of the thickness, the blue glass absorbs the infrared band (700-1200nm) and reduces the infrared cut-off effect. For example, when 0.3mm thick blue glass is used, the infrared light transmittance in the infrared cutoff band is about 20%, and the infrared cutoff effect is poor, which affects the imaging effect of the imaging device and reduces the imaging quality. In order to improve the infrared cutoff effect of the thin blue glass filter, the blue glass substrate can be coated with an optical film with high and low refractive index, or coated with an optical adhesive layer with infrared absorption properties, etc. The infrared cut-off effect of the blue glass filter does not affect the visible light transmittance, and it is also conducive to the development of light, thin and miniaturized devices. However, the current blue glass (such as blue glass with a thickness of 0.1-0.3 mm) has a central cutoff wavelength ("central cutoff wavelength", i.e., in the spectral transmittance curve of a filter such as blue glass, the light transmittance is 50 The wavelength of the corresponding light when The central cutoff wavelength of the blue glass filter coated with the optical adhesive layer reaches about 610 nm. Such a spectral transmittance curve does not match the sensing spectrum of the image sensor. The infrared cutoff filter coated with the optical adhesive layer will Excessive filtering of red light information in visible light reduces the light intensity sensed by the image sensor, which will bring about night scene noise problems, and seriously affect the white balance. Therefore, if a new formula and composition of blue glass can be proposed, the central cutoff wavelength of the blue glass is longer, and the central cutoff wavelength of the infrared cutoff filter formed after coating the optical glue is also longer, so that the use of this The infrared cut-off filter formed by blue glass (for example, the infrared cut-off filter formed by coating an optical adhesive layer on blue glass) can cut off infrared light well, and absorb less red light in visible light, and has less effect on visible light. The higher transmittance will be able to solve the above problems to a great extent.

The present application aims to solve one of the technical problems in the related art at least to a certain extent.

In one aspect of the application, the application proposes a blue glass. Based on the total mass of the blue glass, the blue glass includes: 60.1-75 wt % of phosphorus pentoxide, and 0.5-2.5 wt % of copper oxide. Therefore, when the component content of the blue glass is in the above range, the central cutoff wavelength of the blue glass is longer, and when the blue glass is used in an infrared cut-off filter, the infrared light can be cut off better, and the visible light can be cut off better. The absorption of red light is less, the transmittance of visible light is higher, and the performance is good.

In another aspect of the present application, the present application proposes an infrared cut filter. The infrared cut filter comprises: a blue glass substrate, based on the total mass of the blue glass substrate, the blue glass substrate comprises: 60.1-75wt% of phosphorus pentoxide and 0.5-2.5wt% of copper oxide; optical An adhesive layer, the optical adhesive layer is disposed on one side of the blue glass substrate, and the optical adhesive layer can absorb infrared light, wherein the central cutoff wavelength of the infrared cut filter is 630-650 nm. Therefore, an infrared cut-off filter formed by an optical adhesive layer is arranged on the surface of the blue glass substrate with the component content, and its central cut-off wavelength is relatively long, and the infrared cut-off filter can better cut off infrared light, and It absorbs less red light in visible light and has higher transmittance to visible light, which can improve the intensity of visible light sensed by the image sensor and improve the shooting effect of imaging products.

In yet another aspect of the present application, the present application provides a camera assembly. The camera assembly includes: a camera, the camera has a light incident surface; the aforementioned infrared cut filter, the infrared cut filter is arranged outside the light incident surface of the camera. Therefore, the camera assembly has all the features and beneficial effects of the aforementioned infrared cut-off filter, which will not be repeated here. In general, the camera assembly can avoid problems such as night scene noise and contrast reduction caused by the infrared cut-off filter filtering too much red light information, and the camera assembly has good shooting effect and good performance.

In yet another aspect of the present application, the present application provides an electronic device. The electronic device includes: a casing, the casing defining an accommodating space; the aforementioned camera assembly, the camera assembly being arranged in the accommodating space; a mainboard and a memory, the mainboard and the memory being located in the accommodating space and a screen, the screen is arranged in the accommodating space and connected with the main board. Thus, the electronic device has all the features and advantages of the aforementioned camera assembly, which will not be repeated here. In general, the camera assembly of the electronic device has a good shooting effect and good performance in use.

Description of drawings

FIG. 1 shows a schematic structural diagram of an infrared cut-off filter according to an example of the present application;

FIG. 2 shows a schematic structural diagram of an electronic device according to an example of the present application;

Figure 3 shows a graph of spectral transmittance of blue glasses according to examples and comparative examples of the present application;

FIG. 4 shows a graph of spectral transmittance of an infrared cut filter according to an example of the present application; and

FIG. 5 shows a graph of the spectral transmittance of the infrared cut filter in the comparative example.

Description of reference numbers:

100: blue glass substrate; 200: optical adhesive layer; 1000: infrared cut filter; 1100: electronic equipment; 1200: housing; 1300: camera assembly.

Detailed ways

Examples of the present application are described in detail below, examples of which are illustrated in the accompanying drawings. The examples described below with reference to the accompanying drawings are exemplary, and are intended to explain the present application, but should not be construed as limiting the present application.

In one aspect of the application, the application proposes a blue glass. According to some examples of the present application, based on the total mass of the blue glass, the blue glass includes: 60.1-75 wt % phosphorus pentoxide, and 0.5-2.5 wt % copper oxide. Therefore, when the component content of the blue glass is in the above range, the central cutoff wavelength of the blue glass is longer, and when the blue glass is used in an infrared cut-off filter, the infrared light can be cut off better, and the visible light can be cut off better. The absorption of red light is less, the transmittance of visible light is higher, and the performance is good.

In order to facilitate understanding, the following is a brief description of the principle that the blue glass can obtain the above beneficial effects:

As mentioned above, the current blue glass infrared cut-off filter used in the camera assembly of electronic equipment is usually thin. In order to improve the infrared cutoff effect of the blue glass infrared cut-off filter, the The surface of the substrate is coated with an optical adhesive layer with infrared light absorption properties, etc. However, after the optical adhesive layer is coated on the surface of the blue glass substrate, the center cutoff wavelength of the infrared cut filter will be short (for example, the center cutoff wavelength is about 610 nm), which will cause the infrared cut filter to filter too much The red light information in visible light results in low light intensity sensed by the image sensor, which in turn causes shooting problems such as contrast reduction, white balance imbalance, and night scene noise.

The inventors found that, in order to improve the performance of the blue glass infrared cut-off filter coated with the optical adhesive layer, etc. (that is, to improve the cut-off effect of infrared light and reduce the absorption of red light in visible light), it is possible to pre-prepare Blue glass with a longer central cut-off wavelength, for example, the central cut-off wavelength of blue glass is about 670-700 nm. Therefore, after the surface of the blue glass is coated with an optical adhesive layer, even if the central cut-off wavelength of the infrared cut-off filter is formed. Shorter (for example, about 30nm), the overall central cutoff wavelength of the infrared cutoff filter can also reach about 640nm. The absorption of red light in visible light is small, the transmittance of visible light is high, and the shooting performance is good. . In addition, the inventor found through a lot of experiments and in-depth research that by adjusting the composition and content of the blue glass, especially by adjusting the content and ratio of phosphorus pentoxide and copper oxide in the blue glass, the central cutoff wavelength of the blue glass can be adjusted. , and the infrared light absorption intensity of blue glass can be adjusted. Phosphorus pentoxide is the main component of blue glass. Phosphorus pentoxide is a glass network structure forming agent, which will affect the absorption intensity of blue glass to infrared light; copper oxide has high light transmittance in the visible light band, and has a high light transmittance in the near-infrared band. Strong absorption characteristics, by adjusting the content of copper oxide in the blue glass, the central cutoff wavelength of the blue glass can be adjusted. Therefore, in the present application, based on the total mass of the blue glass, the blue glass includes: 60.1-75 wt % of phosphorus pentoxide, and 0.5-2.5 wt % of copper oxide. Compared with the conventional blue glass with a central cutoff wavelength of about 640 nm, the blue glass in the present application has a higher content of phosphorus pentoxide, a higher absorption intensity to infrared light, and a lower content of copper oxide in the present application. , the central cut-off wavelength of the blue glass is longer, for example, the central cut-off wavelength of the blue glass in this application is about 670-700 nm. Therefore, when the blue glass is used in an infrared cut-off filter (for example, on the surface of the blue glass) Coating an optical adhesive layer with infrared absorption properties to form an infrared cut-off filter), which can better cut off infrared light, and absorb less red light in visible light, with high transmittance to visible light and good performance.

It should be noted that the aforementioned "central cutoff wavelength" refers to the spectral transmittance curve of a filter (such as a blue glass filter, an infrared cutoff filter formed by superimposing an optical adhesive layer on blue glass, etc.). , the wavelength of the corresponding light when the light transmittance is 50%.

According to some examples of the present application, based on the total mass of the blue glass, the content of phosphorus pentoxide is 60.1-75wt%, for example, the content of phosphorus pentoxide may be 60.5%, may be 61wt%, may be 61.4wt%, may be 62wt%, could be 63wt%, could be 64wt%, could be 64.5wt%, could be 65wt%, could be 66wt%, could be 67wt%, could be 68wt%, could be 68.5wt%, could be 69wt% , can be 70wt%, can be 71wt%, can be 71.5wt%, can be 72wt%, can be 73wt%, can be 73.5wt%, can be 74wt%, can be 74.5wt%, etc. Therefore, when the content of phosphorus pentoxide is in the above range, the blue glass has higher infrared absorption intensity, better infrared cut-off effect, and good performance.

According to some examples of the present application, the content of copper oxide is 0.5-2.5wt% based on the total mass of the blue glass, for example, the content of copper oxide may be 0.55wt%, may be 0.6wt%, may be 0.7wt%, may be 0.8wt%, can be 0.85wt%, can be 0.9wt%, can be 1wt%, can be 1.2wt%, can be 1.3wt%, can be 1.4wt%, can be 1.5wt%, can be 1.55wt% , can be 1.6wt%, can be 1.7wt%, can be 1.8wt%, can be 1.9wt%, can be 2wt%, can be 2.1wt%, can be 2.2wt%, can be 2.3wt%, can be 2.35wt%, may be 2.4wt%, may be 2.45wt%, etc. Therefore, when the content of copper oxide is in the above range, the central cut-off wavelength of the blue glass is longer, for example, the central cut-off wavelength of the blue glass can be 670-700 nm, and the infrared ray formed by coating the surface of the blue glass with an optical adhesive layer, etc. The cut-off filter can better cut off infrared light, and has less absorption of red light in visible light, high transmittance to visible light, and good performance.

According to some examples of the present application, the blue glass may further include: fluorine, based on the total mass of the blue glass, the content of fluorine may be less than 10wt%, for example, may be 9wt%, may be 8wt%, may be 7wt%, may be 6wt%, etc. Therefore, when the content of fluorine in the blue glass is in the above range, the transmittance of the blue glass in the visible light band can be improved, the strength of the thinner blue glass can be improved, and the comprehensive performance of the blue glass can be improved.

According to some examples of the present application, the central cutoff wavelength of the blue glass may be 670-700nm, for example, it may be 675nm, it may be 680nm, it may be 685nm, it may be 688nm, it may be 690nm, it may be 692nm, it may be 695nm, it may be 697nm, etc. Therefore, when the central cut-off wavelength of the blue glass is in the above range, after the surface of the blue glass is coated with an optical adhesive layer, even if the central cut-off wavelength of the formed infrared cut-off filter is short (for example, about 30 nm short), The overall central cut-off wavelength of the infrared cut-off filter can also reach about 630-650 nm. The infrared cut-off filter with the central cut-off wavelength range can better cut off infrared light, and has a relatively high absorption of red light in visible light. Small, high visible light transmittance, good shooting performance, can better solve the above-mentioned problems such as night scene noise, white balance imbalance, and contrast reduction caused by the infrared cut-off filter filtering too much red light information.

In another aspect of the present application, the present application proposes an infrared cut filter. According to some examples of the present application, the blue glass substrate in the infrared cut filter can be the blue glass described above. Therefore, the infrared cut filter has all the features and advantages of the blue glass described above. This will not be repeated here. According to some examples of the present application, referring to FIG. 1 , the infrared cut filter 1000 includes: a blue glass substrate 100 and an optical adhesive layer 200 . Based on the total mass of the blue glass substrate 100 , the blue glass substrate includes: 60.1-75 wt % of five Diphosphorus oxide and 0.5-2.5wt% copper oxide; the optical adhesive layer 200 is arranged on one side of the blue glass substrate 100, and the optical adhesive layer 200 can absorb infrared light, wherein the central cutoff wavelength of the infrared cut-off filter 1000 is 630 -650nm. Therefore, the infrared cut-off filter 1000 formed by the optical adhesive layer 200 is disposed on the surface of the blue glass substrate 100 with the component content, and its central cut-off wavelength is relatively long, and the infrared cut-off filter 1000 can be well cut off Infrared light, less absorption of red light in visible light, and higher transmittance of visible light, which can improve the intensity of visible light sensed by the image sensor and improve the shooting effect of imaging products.

According to some examples of the present application, based on the total mass of the blue glass substrate 100 , the content of phosphorus pentoxide is 60.1-75 wt %, for example, the content of phosphorus pentoxide may be 60.5 %, 61 wt %, or 61.4 wt % , can be 62wt%, can be 63wt%, can be 64wt%, can be 64.5wt%, can be 65wt%, can be 66wt%, can be 67wt%, can be 68wt%, can be 68.5wt%, can be 69wt%, can be 70wt%, can be 71wt%, can be 71.5wt%, can be 72wt%, can be 73wt%, can be 73.5wt%, can be 74wt%, can be 74.5wt%, etc. Therefore, when the content of phosphorus pentoxide is in the above range, the blue glass substrate 100 has a higher infrared absorption intensity, a better infrared cut-off effect, and good performance.

According to some examples of the present application, based on the total mass of the blue glass substrate 100 , the content of copper oxide is 0.5-2.5 wt %, for example, the content of copper oxide may be 0.55 wt %, may be 0.6 wt %, may be 0.7 wt %, Can be 0.8wt%, can be 0.85wt%, can be 0.9wt%, can be 1wt%, can be 1.2wt%, can be 1.3wt%, can be 1.4wt%, can be 1.5wt%, can be 1.55 wt%, can be 1.6wt%, can be 1.7wt%, can be 1.8wt%, can be 1.9wt%, can be 2wt%, can be 2.1wt%, can be 2.2wt%, can be 2.3wt%, It may be 2.35wt%, it may be 2.4wt%, it may be 2.45wt%, etc. Therefore, when the content of copper oxide is in the above range, the central cutoff wavelength of the blue glass substrate 100 is relatively long. For example, the central cutoff wavelength of the blue glass substrate 100 can be 670-700 nm, and the infrared cutoff filter 1000 can be better It can cut off infrared light, absorb less red light in visible light, have high transmittance to visible light, and have good performance.

According to some examples of the present application, the blue glass substrate 100 may further include: fluorine, based on the total mass of the blue glass substrate 100 , the content of the fluorine may be less than 10 wt %, such as 9 wt %, 8 wt %, or 7wt%, may be 6wt%, etc. Therefore, when the content of fluorine in the blue glass substrate is in the above range, the transmittance of the blue glass substrate in the visible light band can be improved, the strength of the thinner blue glass substrate 100 can be improved, and the strength of the blue glass substrate 100 can be improved. Comprehensive use performance.

According to some examples of the present application, the thickness of the blue glass substrate 100 may be 0.1-0.3 mm, for example, the thickness of the blue glass substrate 100 may be 0.12 mm, may be 0.13 mm, may be 0.145 mm, may be 0.15 mm, may be 0.16 mm mm, can be 0.17mm, can be 0.18mm, can be 0.2mm, can be 0.21mm, can be 0.23mm, can be 0.25mm, can be 0.27mm, etc. Therefore, the thickness of the blue glass substrate 100 is relatively small, and the thickness of the infrared cut filter 1000 formed by the blue glass substrate 100 is relatively small. When it is applied in the camera assembly, the back focus of the camera module can be reduced, Therefore, the height of the camera assembly can be reduced to a large extent, which is beneficial to the miniaturization and light-thin design of the camera assembly; and the infrared cutoff filter 1000 formed by the blue glass substrate 100 and the optical adhesive layer 200 has a better infrared cutoff effect. Well, the transmittance of visible light is high, which can further improve the shooting effect of the camera assembly.

According to some examples of the present application, the central cutoff wavelength of the blue glass substrate 100 may be 670-700 nm, for example, may be 675 nm, may be 680 nm, may be 685 nm, may be 688 nm, may be 690 nm, may be 692 nm, may be 695 nm, It can be 697nm, etc. Therefore, when the central cutoff wavelength of the blue glass substrate 100 is within the above range, after the optical adhesive layer 200 is coated on the surface of the blue glass substrate 100, even if the central cutoff wavelength of the formed infrared cutoff filter 1000 is short (for example, about 30 nm shorter), the overall central cutoff wavelength of the infrared cutoff filter 1000 can also reach about 630-650nm, and the infrared cutoff filter 1000 with this central cutoff wavelength range can better cut off infrared light, and can The absorption of red light in visible light is small, the visible light transmittance is high, and the shooting performance is good.

According to some examples of the present application, the optical adhesive layer 200 can absorb infrared light, so that the infrared cutoff effect of the infrared cutoff filter 1000 can be improved. Specifically, the optical adhesive layer 200 can also absorb ultraviolet light at the same time, so that the interference of the ultraviolet light on the spectral information obtained by the image sensor can be avoided, and the shooting effect of the camera assembly can be further improved. Specifically, the optical adhesive layer 200 may have two light absorption peaks, that is, the optical adhesive layer 200 can absorb infrared light and ultraviolet light at the same time, and the wavelength range of the infrared band absorbed by the optical adhesive layer 200 may be 600-780 nm, and the optical adhesive layer 200 The wavelength range of the absorbed ultraviolet band can be 350-420nm, and the optical transmittance of the optical adhesive layer 200 in the infrared band and the ultraviolet band can be no more than 1%, for example, the optical transmittance of the optical adhesive layer 200 in the infrared band and the ultraviolet band It may be not more than 0.8%, may not be more than 0.5%, and the like. Therefore, the infrared absorption performance and ultraviolet absorption performance of the optical adhesive layer 200 are better, which can further improve the infrared cutoff effect of the infrared cutoff filter 1000, and make the infrared cutoff filter 1000 have the ultraviolet cutoff effect, which can further Improve the shooting effect of the camera assembly. Specifically, the light transmittance of the optical adhesive layer 200 in the visible light band of 450-600 nm may not be less than 88%, for example, may be 90% or the like. Therefore, the optical transmittance of the optical adhesive layer 200 in the visible light band is relatively high, which can improve the light transmittance of the infrared cut filter 1000 in the visible light band, and further improve the camera assembly using the infrared cut filter 1000 shooting effect.

According to some examples of the present application, the material for forming the optical adhesive layer 200 is not particularly limited as long as it has infrared absorption properties. Specifically, the material for forming the optical adhesive layer 200 may include: an ethylene oxide compound and a coloring compound, The coloring compound can adjust the light absorption characteristics of the optical adhesive layer 200. For example, by selecting a suitable coloring compound, the optical adhesive layer 200 can have good infrared absorption performance and ultraviolet absorption performance. Specifically, the thickness of the optical adhesive layer 200 may be 1-10 μm, such as 2 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, etc. Therefore, when the thickness of the optical adhesive layer 200 is within the above range, the infrared cutoff effect and visible light transmittance of the infrared cutoff filter 1000 can be better improved, and the thickness of the infrared cutoff filter 1000 will not be significantly increased. Conducive to the thin and light design of the camera assembly.

According to some examples of the present application, the center cutoff wavelength of the infrared cut filter 1000 is 630-650 nm, such as 635 nm, 640 nm, 642 nm, 645 nm, 647 nm, and the like. Therefore, when the central cutoff wavelength of the infrared cutoff filter 1000 is within the above range, it can better cut off infrared light, and absorb less red light in visible light, which can improve the visible light sensed by the image sensor in the camera assembly. Intensity, improve the shooting effect of imaging products.

Specifically, the light transmittance of the infrared cut filter 1000 in the 700-1200 nm band is not more than 1%, for example, it may not be greater than 0.8%, may not be greater than 0.5%, etc. Therefore, the infrared cutoff filter 1000 The cut-off effect is good, and the shooting effect of the camera assembly using the infrared cut-off filter 1000 can be further improved.

Specifically, the light transmittance of the infrared cut filter 1000 in the visible light band of 400-700 nm may not be less than 75%. For example, it can be 76%, it can be 78%, it can be 80%, etc. Therefore, the transmittance of the infrared cut filter 1000 to visible light is high, which can increase the intensity of visible light sensed by the image sensor in the camera assembly, and improve the photographing effect of imaging products. Specifically, the transmittance of the infrared cut filter 1000 to the red light in the visible light band may be greater than 15%, for example, it may be 16%, 17%, 18%, 19%, 20%, etc. . Therefore, the infrared cut-off filter 1000 absorbs less red light in visible light, which can improve the intensity of visible light sensed by the image sensor in the camera assembly, improve the shooting effect of imaging products, and can better solve the problem of infrared light. The cut-off filter filters out the night scene noise, white balance imbalance, and contrast reduction caused by too much red light information.

In yet another aspect of the present application, the present application provides a camera assembly. According to some examples of the present application, the camera assembly includes: a camera and the aforementioned infrared cutoff filter, the camera has a light incident surface, and the infrared cutoff filter is disposed outside the light incident surface of the camera ("outside" is the camera the side facing the outside environment). Therefore, the camera assembly has all the features and beneficial effects of the aforementioned infrared cut-off filter, which will not be repeated here. In general, the camera assembly can avoid problems such as night scene noise and contrast reduction caused by the infrared cut-off filter filtering too much red light information, and the camera assembly has good shooting effect and good performance.

In yet another aspect of the present application, the present application provides an electronic device. According to some examples of the present application, referring to FIG. 2 , the electronic device 1100 includes: a housing 1200 , the aforementioned camera assembly 1300 , a main board, a memory, and a screen (not shown in the figure). The housing 1200 defines an accommodating space, The camera assembly 1300 is disposed in the accommodating space, the main board and the memory are located inside the accommodating space, and the screen is disposed in the accommodating space and connected to the main board. Therefore, the electronic device 1100 has all the features and advantages of the aforementioned camera assembly 1300 , which will not be repeated here. In general, the camera assembly 1300 of the electronic device 1100 has a good shooting effect and good performance.

Illustratively, the electronic device may be any of various types of computer system devices that are mobile or portable and that perform wireless communications. Specifically, the electronic device can be a mobile phone or a smart phone (eg, iPhoneTM-based, AndroidTM-based phones), portable gaming devices (eg, Nintendo DSTM, PlayStationPortableTM, Gameboy AdvanceTM, iPhoneTM), laptop computers, PDAs, portable Internet devices, music players and data storage devices, other handheld devices, etc.

The solution of the present application will be described below through specific examples. It should be noted that the following examples are only used to illustrate the present application, and should not be regarded as limiting the scope of the present application. If no specific technique or condition is specified in the example, the technique or condition described in the literature in the field or the product specification is used.

Example 1

Blue glass A was prepared. The content of phosphorus pentoxide in the blue glass A is 65 wt %, the content of copper oxide is 1.5 wt %, and the content of fluorine is 8 wt %, and the thickness of the blue glass A is 0.1 mm.

Example 2

An optical adhesive layer is coated on the surface of the blue glass A formed in Example 1, and the optical adhesive layer can simultaneously absorb infrared light and ultraviolet light to form an infrared cut-off filter A.

Comparative Example 1

Prepare blue glass B. The content of phosphorus pentoxide in the blue glass B is 50 wt %, the content of copper oxide is 4.5 wt %, and the content of fluorine is 8 wt %, and the thickness of the blue glass A is 0.1 mm.

Comparative Example 2

The surface of the blue glass B formed in Comparative Example 1 was coated with an optical adhesive layer (the composition, thickness and other properties of the optical adhesive layer were the same as those of the optical adhesive layer in Example 2) to form an infrared cut-off filter B.

Performance Testing

(1) Test the infrared cutoff spectra of blue glass A and blue glass B formed in Example 1 and Comparative Example 1. The test results refer to Fig. 3. It can be seen from Fig. 3 that the center cutoff of blue glass A in Example 1 The wavelength is about 680 nm, and the central cutoff wavelength of the blue glass B in Comparative Example 1 is about 640 nm. Therefore, the blue glass in the present application has a longer central cutoff wavelength.

(2) Test the light transmittance of the infrared cut-off filter A and the infrared cut-off filter B formed in Example 2 and Comparative Example 2 in the visible light range (400nm-700nm). The test results refer to Table 1 and the accompanying drawings. 4 and accompanying drawing 5, wherein, accompanying drawing 4 is the spectral transmittance curve diagram of infrared cut-off filter A in example 2, and accompanying drawing 5 is the spectral transmittance of infrared cut-off filter B in comparative example 2 Graph.

Table 1: Optical transmittance data table of IR cut filter A and IR cut filter B in the 400-700nm band

It can be seen from the above test data and accompanying drawings 4 and 5 that the total light transmittance and red light transmittance of the infrared cut filter A in Example 2 are higher (higher than Comparative Example 2), that is, the The central cut-off wavelength of blue glass is longer (about 680nm). After coating the optical adhesive layer, the central cut-off wavelength of the infrared cut-off filter A formed by laminating the blue glass and the optical adhesive layer is also longer (about 640 nm). Therefore, The infrared cut-off filter A in example 2 absorbs less red light in visible light, and the red light transmittance is high. The total light transmittance and red light transmittance of the infrared cut-off filter A in Comparative Example 2 are lower, and the central cutoff wavelength of the blue glass in Comparative Example 2 is shorter ( 640nm), after coating the optical adhesive layer, the central cutoff wavelength of the infrared cutoff filter B formed by laminating the blue glass and the optical adhesive layer is also shorter (about 610nm). Therefore, the infrared cutoff filter in Comparative Example 2 Sheet B absorbs more red light in the visible light, the red light transmittance is low, and the total light transmittance is low. Therefore, in the present application, after adjusting the content of phosphorus pentoxide and copper oxide in the blue glass, the central cutoff wavelength of the blue glass is increased, and the infrared cutoff filter in the present application (blue glass superimposed optical adhesive layer) It has a good infrared cut-off effect, and the absorption of red light is small, and the transmittance of visible light is high, which can avoid the night scene noise, white balance imbalance, For problems such as contrast reduction, the camera assembly using the infrared cut-off filter in the present application has a good shooting effect and good performance.

The embodiments of the present application have been described in detail above. However, the present application is not limited to the specific details in the above-mentioned embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. It belongs to the protection scope of this application. In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction.

In the description of this specification, reference to a description of the terms "example," "some examples," etc. means that a particular feature, structure, material, or characteristic described in connection with the example or example is included in at least one example or instance of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same example or instance. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more examples or examples. Furthermore, those skilled in the art may combine and combine different examples or examples and features of different examples or examples described in this specification without conflicting each other.

Although the examples of the present application have been shown and described above, it should be understood that the above-mentioned examples are exemplary and should not be construed as limitations of the present application, and those of ordinary skill in the art can perform the above-mentioned examples within the scope of the present application. Variations, modifications, substitutions and variants.

Claims (10)

1. An infrared cut-off filter is characterized by consisting of a blue glass substrate and an optical adhesive layer,

based on the total mass of the blue glass substrate, the blue glass substrate comprises: 60.1-75 wt% of phosphorus pentoxide and 0.5-2.5 wt% of copper oxide, wherein the center cut-off wavelength of the blue glass substrate is 670-700 nm;

the optical adhesive layer is arranged on one side of the blue glass substrate and can absorb infrared light, wherein the central cut-off wavelength of the infrared cut-off filter is 630-650nm, and the light transmittance of the optical adhesive layer in a visible light waveband of 450-600nm is not less than 88%;

the light transmittance of the infrared cut-off filter in the 700-1200nm wave band is not more than 1%.

2. The infrared cut filter according to claim 1, wherein the blue glass substrate has a thickness of 0.1 to 0.3 mm.

3. The infrared cut filter according to claim 1, wherein the blue glass substrate further comprises: a fluorine element, the fluorine element content being less than 10 wt% based on the total mass of the blue glass substrate.

4. The infrared cut filter according to claim 1, wherein the thickness of the optical cement layer is 1 to 10 μm.

5. The infrared cut filter according to claim 4, wherein a material forming the optical cement layer comprises: oxirane compounds and coloring compounds.

6. The IR-cut filter according to claim 4 or 5, wherein the optical adhesive layer can absorb the IR light and the UV light, the wavelength range of the IR band absorbed by the optical adhesive layer is 600-780nm, the wavelength range of the UV band absorbed by the optical adhesive layer is 350-420nm,

the light transmittance of the optical adhesive layer in the infrared band and the ultraviolet band is not more than 1%.

7. The IR-cut filter according to claim 1, wherein the transmittance of the IR-cut filter in the visible light band of 400-700nm is not less than 75%.

8. The infrared cut filter according to claim 7, wherein the infrared cut filter has a transmittance of more than 15% for red light in the visible light band.

9. A camera head assembly, comprising:

the camera is provided with a light incident surface;

the infrared cut filter of any one of claims 1 to 8, disposed outside the light incident surface of the camera.

10. An electronic device, comprising:

a housing defining an accommodating space;

the camera assembly of claim 9, disposed in the receiving space;

the main board and the memory are positioned in the accommodating space; and

and the screen is arranged in the accommodating space and is connected with the main board.

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