Camera module and electronic equipment

Abstract

The invention provides a camera module and electronic equipment. The camera module comprises a lens and a photosensitive element, the lens is used for filtering light with the wavelength ranging from 700 nm to 1000 nm, and the photosensitive element is located on the image side of the lens; the lens comprises a plurality of lenses and at least two infrared filtering films, the lenses are arranged in the direction from the object side of the lens to the image side of the lens, one of the lenses is used for filtering light in a first wavelength range, the infrared filtering films are arranged on the surfaces of the two sides of at least one of the lenses respectively, and the infrared filtering films are used for filtering light in a second wavelength range. All the infrared filtering membranes are jointly used for filtering light in a second wavelength range, and the sum of the first wavelength range and the second wavelength range is 700 nm to 1000 nm. According to the camera module provided by the invention, an optical filter structure is canceled, and through the design of the lens and the infrared filtering film, the lens filtering function is realized, the thickness of the whole camera module is reduced, and the light and thin design is realized.

Description

Technical Field

[0001] This application relates to the technical field of photographing devices, and particularly to a camera module and an electronic device. Background Art

[0002] With the development demand for the thinning of electronic devices, the camera module also needs to be designed with reduced thickness. The traditional camera module includes a lens, a filter, and a photosensitive element (sensor) arranged from the object side to the image side. The lens is used to receive external light and change the light transmission path so that the light can pass through the filter and be incident on the photosensitive element. The photosensitive element is used to convert the optical signal of the received light into image data, which is processed by the image processor in the electronic device and then imaged on the screen. Among them, the filter is used to filter the light passing through the lens to achieve a better imaging effect. Among them, the lens, the filter, and the photosensitive element are all components that affect the thickness of the camera module. However, since these components are all necessary components and are difficult to omit, it is difficult to design the camera with reduced thickness. Summary of the Invention

[0003] This application provides a camera module, including a lens and a photosensitive element. The lens includes multiple lens elements and at least two infrared filter films. By designing the lens elements and the infrared filter films, the filtering of light with wavelengths ranging from 700 nm to 1000 nm is achieved, so as to eliminate the filter in the existing camera module, thereby reducing the back focal length of the lens, and further reducing the thickness of the entire camera module to achieve a thinning design.

[0004] In a first aspect, this application provides a camera module, which includes a lens and a photosensitive element. The lens is used to filter light with wavelengths in the range of 700 nm to 1000 nm, and the photosensitive element is located on the image side of the lens. The lens includes multiple lens elements and at least two infrared filter films. The multiple lens elements are arranged in the direction from the object side of the lens to the image side of the lens. One of the multiple lens elements is used to filter light in a first wavelength range, and infrared filter films are respectively arranged on both surfaces of at least one of the multiple lens elements. All the infrared filter films are jointly used to filter light in a second wavelength range. The union of the first wavelength range and the second wavelength range is 700 nm to 1000 nm.

[0005] In the present application, the camera module can filter light in the range of 700 nm to 1000 nm through the lens, achieving the function of infrared light filtering. It can eliminate infrared interference, reduce or avoid image noise in low-light conditions, improve the restoration degree of imaging details, and make the captured image more conform to the human eye's perception. Since the infrared light filtering function can be achieved through the lens without setting a traditional filter between the lens and the photosensitive element, the degree of freedom in the design of the back focal length of the lens can be increased, thereby compressing the back focal length space of the lens, reducing the overall optical length TTL, and further reducing the overall thickness of the camera module to achieve the thin and light design of the camera module, which is beneficial to applying the camera module to electronic devices to achieve the thin and light design of the electronic devices.

[0006] In the present application, since there is no need to set a traditional filter between the lens and the photosensitive element, during the assembly process of the camera module, the process of attaching the filter is reduced, thus avoiding the risk of glass foreign objects. Therefore, for the camera module provided in the present application, without setting a traditional filter, installing the lens in the first part of the lens barrel and installing the photosensitive element in the second part of the lens barrel, the first part of the lens barrel and the second part of the lens can be directly encapsulated, which can not only reduce the assembly process of the camera module and improve the assembly efficiency, but also avoid the POG risk during the assembly process.

[0007] In the present application, the infrared filter film is disposed on both side surfaces of at least one lens to realize the installation of at least two infrared filter films in the lens. Through the lens capable of filtering light in the first wavelength range and cooperating with at least two infrared filter films, the infrared light filtering function of the lens is realized. In addition, by disposing the infrared filter film on both side surfaces of the lens, the pulling forces on both side surfaces of the lens by the infrared filter film can be at least partially offset, thereby reducing or even eliminating the external force on the lens due to coating, and further reducing or even eliminating the influence of surface shape variation caused by coating.

[0008] In some possible implementation manners, the minimum value in the first wavelength range is less than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is less than the maximum value in the second wavelength range.

[0009] In this implementation manner, by using the infrared filter film in cooperation with the lens capable of filtering light in the first wavelength range, the complementarity of filtering longer-wavelength light and shorter-wavelength light is achieved, thereby improving the ability of the lens to filter infrared light and further improving the imaging quality of the camera module.

[0010] Among them, the first wavelength range and the second wavelength range may have an intersection, which is conducive to achieving the effect of the cut-off depth of the wavelengths in the intersection range of the first wavelength range and the second wavelength range, thereby avoiding the light leakage phenomenon of partial wavelength light in the lens, and further ensuring the infrared light filtering quality of the lens to improve the imaging quality of the camera module.

[0011] In some possible implementation manners, a single infrared filter film includes multiple layers of first films and multiple layers of second films, and the multiple layers of first films and the multiple layers of second films are arranged alternately one by one. Among them, the refractive index of each layer of the first film is greater than or equal to 2, and the refractive index of each layer of the second film is less than 2.

[0012] In this implementation manner, by alternately arranging the first film with a relatively high refractive index and the second film with a relatively low refractive index one by one, the filtering effect on infrared light is improved, and the transmission effect of visible light is improved, thereby improving the imaging quality of the camera module.

[0013] In some possible implementation manners, the thickness d1 of each layer of the first film satisfies: 1nm ≤ d1 ≤ 130nm, and the thickness d2 of each layer of the second film satisfies: 1nm ≤ d2 ≤ 130nm.

[0014] In this implementation manner, by setting the thicknesses of the first film and the second film, each layer of the first film and each layer of the second film can achieve the function of infrared filtering, so that the multiple layers of first films and the multiple layers of second films can cooperate to achieve the filtering function of a single infrared filter film.

[0015] In some possible implementation manners, some of the first films in the multiple layers of first films have a first thickness, and some other first films have a second thickness, and the first films with the first thickness and the first films with the second thickness are arranged alternately. Some of the second films in the multiple layers of second films have a first thickness, and some other second films have a second thickness, and the second films with the first thickness and the second films with the second thickness are arranged alternately. Among them, the first thickness d3 satisfies: 1nm ≤ d3 < 66nm, and the second thickness d4 satisfies: 66nm ≤ d4 ≤ 130nm.

[0016] In this implementation manner, by alternately arranging the thicker first films and the thinner first films, and alternately arranging the thicker second films and the thinner second films, it is beneficial to the process feasibility of coating on the surface of the lens, and thus it is beneficial to alternately coat the first film and the second film one by one.

[0017] In some possible implementation manners, the thickness of a single infrared filter film is less than or equal to 6μm.

[0018] In this implementation, the thickness of a single infrared filter film is less than or equal to 6 μm to avoid excessive thickness of a single infrared filter film, which may cause excessive pulling force of the single infrared filter film on the lens, thereby avoiding the influence of the infrared filter film on the surface shape of the lens.

[0019] In some possible implementations, the thickness of each part of a single infrared filter film is the same.

[0020] In this implementation, the thickness of each part of a single infrared filter film is the same so that the light filtering effect of each part of the single infrared filter film is consistent, which is beneficial to improving the stability of light filtering.

[0021] Among them, for two infrared filter films provided on the two side surfaces of the same lens, the ratio of the thickness of one infrared filter film to the thickness of the other infrared filter film is in the range of 1 to 1.2.

[0022] In this implementation, the thickness difference between the two infrared filter films provided on the two side surfaces of the same lens is small, so that the difference in the pulling force of the two infrared filter films on the surface of the lens is small, which is beneficial to canceling out the pulling forces of the two infrared filter films on the lens, thereby reducing or even eliminating the influence of the film coating on the two side surfaces of the lens on the surface shape variation of the lens.

[0023] In some possible implementations, there is a wavelength range intersection in the wavelength ranges of at least two infrared filter films for filtering light.

[0024] In this implementation, it is beneficial to improve the cut-off depth effect of all infrared filter films in cooperation on the light in the second wavelength range, thereby improving the infrared filtering effect of the lens and further improving the imaging effect of the camera module. For example, the wavelength range intersection includes 850 nm, which can ensure the cut-off depth effect of the lens on the light of 850 nm, thereby preventing the risk of warm yellowish imaging when large-angle light is incident.

[0025] Among them, the ratio of the extreme difference of the wavelength range intersection to the extreme difference of the wavelength range of the lens for filtering light is greater than or equal to 50%.

[0026] In this implementation, the cut-off depth effect of the lens on infrared light is improved, thereby improving the imaging effect of the camera module. Among them, the extreme difference refers to the difference between the maximum value and the minimum value in the wavelength range.

[0027] In some possible implementations, the number of lenses is at least 4, and the infrared filter film is provided on the two side surfaces of the first lens close to the image side of the lens; or, the infrared filter film is provided on the two side surfaces of the second lens close to the image side of the lens; or, the infrared filter film is provided on the two side surfaces of the third lens close to the image side of the lens.

[0028] In this implementation, according to the principles of geometric optics, on the object side and image side of the first, second, and third lenses near the lens, the incident angle of the chief ray is relatively small. Therefore, the spectral shift of the spectral curve of the infrared filter film on the object side and image side of the first, second, and third lenses near the lens is also small, which can reduce the shift of the infrared filter film in different fields of view, thereby reducing the risk of color cast, further reducing the drop value of the color shading curve of the infrared filter film, and while reducing the color correction pressure, making the color of the camera module imaging more natural and real.

[0029] In some possible implementations, the multiple lenses include at least one plastic lens, and the infrared filter film is disposed on both side surfaces of at least one plastic lens.

[0030] In this implementation, plastic lenses are easy to prepare by processing, which is beneficial to reducing the preparation difficulty of the lens. By disposing the infrared filter film on both side surfaces of the plastic lens, the pulling forces of the infrared filter films on both side surfaces of the plastic lens can be at least partially offset, thereby reducing or even eliminating the surface profile variation caused by coating the surface of the plastic lens.

[0031] Among them, the plastic lens provided with the infrared filter film is located on the image side of the first lens near the object side of the lens.

[0032] In this implementation, not setting the plastic lens provided with the infrared filter film as the first lens on the object side of the lens can avoid the incident angle of the light on the image side of the first lens being too large, which may cause the spectral transmittance drift in different fields of view, thereby avoiding the increase in the color shading risk. In addition, if the plastic lens provided with the infrared filter film is set as the first lens on the object side of the lens, it will also cause the ID side of the lens to turn red, resulting in ID risk, and the first lens of the lens being a plastic lens is not conducive to the thin and light design of the lens.

[0033] In some possible implementations, the multiple lenses include a plastic lens doped with color masterbatch, and the plastic lens doped with color masterbatch is used to filter light in the first wavelength range.

[0034] In this implementation, color masterbatch is doped in a plastic lens, so that the plastic lens doped with color masterbatch can filter part of the infrared rays, that is, it can filter light in the first wavelength range, and the plastic lens doped with color masterbatch can also absorb ultraviolet rays or part of the blue light band, thereby improving the pseudo-color risk caused by removing the filter in the camera module.

[0035] Among them, the plastic lens doped with color masterbatch is located on the image side of the first lens near the object side of the lens, so as to prevent the plastic lens doped with color masterbatch from affecting the appearance of the camera module due to its own color.

[0036] In some possible implementation manners, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens doped with color masterbatch is in the range of 1 to 1.15.

[0037] In this implementation manner, the difference in the effective thicknesses of each part of the plastic lens doped with color masterbatch is small, which can improve the consistency of the light filtering effect of each part of the plastic lens doped with color masterbatch. For example, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens doped with color masterbatch can be 1, or 1.03, or 1.06, or 1.09, or 1.12, or 1.15, or other values between 1 and 1.15. It should be noted that the effective thickness of the plastic lens doped with color masterbatch refers to the thickness of the part of the plastic lens doped with color masterbatch that is used for light transmission.

[0038] In some possible implementation manners, the number of lenses is at least 4, and the plastic lens doped with color masterbatch is the second lens or the third lens near the object side of the lens.

[0039] In this implementation manner, in the lens design, generally, the difference in the effective thicknesses of the second lens or the third lens near the object side of the lens is small. By designing the second lens or the third lens near the object side of the lens as a plastic lens and doping it with color masterbatch, the consistency of the light filtering effect of each part of the plastic lens doped with color masterbatch can be improved.

[0040] In some possible implementation manners, the plastic lens doped with color masterbatch and the plastic lens with infrared filter films provided on both sides are the same plastic lens.

[0041] In this implementation manner, since the difference in the effective thicknesses of the plastic lens doped with color masterbatch is small, the surface flatness of the plastic lens doped with color masterbatch is relatively high, thereby reducing the process difficulty of providing infrared filter films on both sides of the plastic lens doped with color masterbatch.

[0042] In some other possible implementation manners, the plastic lens doped with color masterbatch and the plastic lens with infrared filter films provided on both sides are different plastic lenses.

[0043] In this implementation manner, the plastic lens with infrared filter films provided on both sides can be located on the image side or the object side of the plastic lens doped with color masterbatch, improving the flexibility of the relative position design of the plastic lens with infrared filter films provided on both sides and the plastic lens doped with color masterbatch, and can be flexibly designed according to the arrangement spacing of each lens in the lens and the actual application requirements.

[0044] In some possible implementation manners, the multiple lenses include one glass lens and three plastic lenses. Along the object side of the lens pointing to the image side of the lens, the one glass lens and the three plastic lenses are arranged in sequence.

[0045] In this implementation manner, by designing the architecture of the lens as a 1G + 3P architecture, it is beneficial to reduce the overall height of the lens. Among them, G represents a glass lens, and P represents a plastic lens.

[0046] In some possible implementation manners, the multiple lenses include four plastic lenses.

[0047] In this implementation manner, through the design of all-plastic lenses, a 4P architecture is formed, which can reduce the overall manufacturing process of the lens, thereby reducing the production cost.

[0048] In some possible implementation manners, the multiple lenses include one glass lens made of blue glass material, and the glass lens made of blue glass material is used to filter light in the first wavelength range.

[0049] In this implementation manner, by combining the glass lens made of blue glass material with at least two infrared filter films, light in the union of the first wavelength range and the second wavelength range can be filtered, thereby realizing the infrared filtering function of the lens, reducing or avoiding image noise in low light conditions, improving the reduction degree of imaging details, and making the formed image more in line with the human eye's perception. Since the infrared filtering function can be realized through the lens, there is no need to set a traditional filter between the lens and the photosensitive element, which can improve the degree of freedom of the back focal design of the lens, thereby compressing the back focal space of the lens, reducing the overall optical length TTL, and further reducing the overall thickness of the camera module to achieve a thin and light design of the camera module, which is beneficial to applying the camera module to electronic devices to achieve a thin and light design of the electronic devices.

[0050] In some possible implementation manners, the glass lens made of blue glass material is the first lens close to the object side of the lens.

[0051] In this implementation manner, since the first lens close to the object side of the lens can adopt a spherical shape, the glass lens made of blue glass material can be prepared by a grinding process, thereby reducing the manufacturing process difficulty of the glass lens made of blue glass material.

[0052] In some other possible implementation manners, the glass lens made of blue glass material is the second lens close to the object side of the lens.

[0053] In this implementation manner, the first lens close to the object side of the lens can adopt a glass lens, and the second lens can adopt a glass lens made of blue glass material. The architecture of using two glass lenses is beneficial to compressing the thickness of the lens, thereby being beneficial to achieving a thin and light design of the lens.

[0054] Among them, the glass lens made of blue glass material can also be prepared by the low-temperature molding process. The blue glass material is molded into the first lens or the second lens on the object side close to the lens through the molding process. The low-temperature molding process can avoid the volatilization of ionic components in the blue glass material caused by high temperature and reduce the infrared cut-off effect.

[0055] In some possible implementation manners, the first lens on the object side close to the lens is a glass lens, and the total optical length TTL of the lens satisfies: TTL < 2.25 mm.

[0056] In this implementation manner, the first lens is a glass lens, which is beneficial to compressing the overall height of the lens. By designing the total optical length TTL of the lens, the overall lens is thinner, which is beneficial to the thin and light design of the camera module, and thus beneficial to applying the camera module to an electronic device to enable the electronic device to achieve a thin and light design.

[0057] In some possible implementation manners, the total optical length TTL of the lens and the focal length EFL of the lens satisfy: EFL / TTL > 0.8.

[0058] In this implementation manner, by limiting the total length TTL of the lens and the focal length EFL of the lens, the long focal length shooting requirement and the short total length requirement of the lens can be taken into account, which is beneficial to the thin and light design of the lens.

[0059] In some possible implementation manners, the back focal length FBL of the lens satisfies: FBL < 0.5 mm.

[0060] In this implementation manner, by designing the back focal length FBL of the lens, after canceling the filter in the camera module, the back focal length of the lens is compressed to reduce the height of the lens, which is beneficial to the thin and light design of the camera module.

[0061] In some possible implementation manners, the back focal length FBL of the lens and the total optical length TTL of the lens satisfy: 0.1 <fbl ttl>0.3。

[0062] In this implementation, by limiting the ratio of the back focal length FBL of the lens to the total optical length TTL of the lens, the distance between the lens and the photosensitive element can meet the imaging requirements, and by controlling the value of the back focal length FBL of the lens within a relatively small range, it is beneficial to the thin and light design of the lens, and thus beneficial to the thin and light design of the camera module.

[0063] In some possible implementations, the field of view FOV of the lens satisfies: 80° < FOV < 110°.

[0064] In this implementation, by limiting the range of the field of view FOV, the field of view size and optical magnification of the lens can be kept appropriate.

[0065] In some possible implementations, the Abbe number of at least two of the multiple lenses is greater than 55.

[0066] In this implementation, the chromatic dispersion of the lens is small, which is beneficial to the imaging effect of the camera module.

[0067] In a second aspect, the present application also provides an electronic device, which includes an image processor and a camera module as described in any of the foregoing implementations. The image processor is communicatively connected to the camera module, and the image processor is configured to obtain image data from the camera module and process the image data.

[0068] In some possible implementations, the electronic device further includes a screen and a back shell. The screen is mounted on the back shell to enclose an internal space. The camera module is mounted in the internal space, and the screen is located on the object side of the lens of the camera module. Among them, the screen includes a light-transmitting cover plate and a display screen. The light-transmitting cover plate and the display screen are stacked, and the light-transmitting cover plate is located on the side of the display screen away from the lens. The screen is provided with a light-transmitting area corresponding to the lens. The number of infrared filter films is at least three, and one of the infrared filter films is disposed on the surface of the light-transmitting cover plate facing the lens and corresponding to the light-transmitting area.

[0069] In this implementation, the infrared filter film disposed on the light-transmitting cover plate and the infrared filter films disposed on both surfaces of at least one lens in the lens jointly implement the filtering of light in the second wavelength range, and the plastic lens doped with color masterbatch material in the lens or the glass lens made of blue glass material in the lens implements the filtering of light in the first wavelength range, so as to realize the infrared filtering function jointly implemented by the infrared filter film disposed on the light-transmitting cover plate and the lens.

[0070] In addition, since the infrared filter film provided on the light-transmitting cover plate can filter some light within the second wavelength range, the total thickness of the infrared filter film provided in the lens can be reduced, thereby reducing the thickness of a single infrared filter film. Furthermore, the surface tensile force received by the lens with infrared filter films provided on both sides is reduced, which helps to reduce the risk of surface deformation of the lens with infrared filter films provided on both sides.

[0071] In a third aspect, the present application also provides an electronic device, which includes a screen, a back shell, a camera module, and an infrared filter film. The screen is installed on the back shell, enclosing an internal space. The camera module is installed in the internal space. The camera module includes a lens and a photosensitive element. The photosensitive element is located on the image side of the lens, and the screen is located on the object side of the lens. Among them, the lens includes multiple lens elements. The multiple lens elements are arranged in the direction from the object side of the lens to the image side of the lens. One of the multiple lens elements is used to filter light within the first wavelength range. The screen includes a light-transmitting cover plate and a display screen. The light-transmitting cover plate and the display screen are stacked. The light-transmitting cover plate is located on the side of the display screen away from the lens. The screen is provided with a light-transmitting area corresponding to the lens. The infrared filter film is provided on the surface of the light-transmitting cover plate facing the lens and corresponds to the light-transmitting area. The infrared filter film is used to filter light within the second wavelength range. The union of the first wavelength range and the second wavelength range is 700nm to 1000nm.

[0072] In this implementation, the infrared filter film provided on the surface of the light-transmitting cover plate facing the lens and the lens together realize the infrared filtering function, so that there is no need to provide a filter in the camera module, which helps to compress the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a thinner and lighter design.

[0073] In a fourth aspect, the present application also provides an electronic device, which includes a camera module, a screen, a back shell, and at least two infrared filter films. The screen is installed on the back shell, enclosing an internal space. The camera module is installed in the internal space. The camera module includes a lens and a photosensitive element. The photosensitive element is located on the image side of the lens, and the screen is located on the object side of the lens. Among them, the lens includes multiple lens elements. The multiple lens elements are arranged in the direction from the object side of the lens to the image side of the lens. One of the multiple lens elements is used to filter light within the first wavelength range. The multiple lens elements include at least one glass lens element, and an infrared filter film is provided on one side surface of at least one glass lens element. The screen includes a light-transmitting cover plate and a display screen. The light-transmitting cover plate and the display screen are stacked. The light-transmitting cover plate is located on the side of the display screen away from the lens. The screen is provided with a light-transmitting area corresponding to the lens. One of the at least two infrared filter films is provided on the surface of the light-transmitting cover plate facing the lens and corresponds to the light-transmitting area. All the infrared filter films are used to filter light within the second wavelength range. The union of the first wavelength range and the second wavelength range is 700nm to 1000nm.

[0074] In this implementation, due to the relatively high hardness of the glass material, when an infrared filter film is disposed on one surface of the glass lens, the surface shape variation of the glass lens is relatively small or even without deformation. The infrared filter film disposed on the surface of the light-transmitting cover plate facing the lens, the lens for filtering light in the first wavelength range, and the infrared filter film disposed on the surface of the glass lens together achieve the infrared filtering function, so that a filter is not required to be disposed in the camera module, which is beneficial to compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a thin and light design.

[0075] In some possible implementations, the minimum value in the first wavelength range is less than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is less than the maximum value in the second wavelength range.

[0076] In this implementation, by using the infrared filter film in combination with the lens capable of filtering light in the first wavelength range, the complementarity of filtering light with longer wavelengths and shorter wavelengths is achieved, thereby improving the ability of the lens to filter infrared light and further improving the imaging quality of the camera module.

[0077] In some possible implementations, a single infrared filter film includes multiple layers of first films and multiple layers of second films, and the multiple layers of first films and the multiple layers of second films are alternately arranged one by one. Among them, the refractive index of each layer of the first film is greater than or equal to 2, and the refractive index of each layer of the second film is less than 2.

[0078] In this implementation, by alternately arranging the first film with a relatively high refractive index and the second film with a relatively low refractive index one by one, the filtering effect on infrared light is improved, and the transmission effect of visible light is improved, thereby improving the imaging quality of the camera module.

[0079] In some possible implementations, the thickness d1 of each layer of the first film satisfies: 1 nm ≤ d1 ≤ 130 nm, and the thickness d2 of each layer of the second film satisfies: 1 nm ≤ d2 ≤ 130 nm.

[0080] In this implementation, by setting the thicknesses of the first film and the second film, each layer of the first film and each layer of the second film can achieve the infrared filtering function, so that the multiple layers of first films and the multiple layers of second films can achieve the filtering function of the single infrared filter film 12 after being combined.

[0081] In some possible implementation manners, some of the first films in the multiple layers of the first film have a first thickness, and the other part of the first film has a second thickness. The first films with the first thickness and the first films with the second thickness are arranged alternately. Some of the second films in the multiple layers of the second film have a first thickness, and the other part of the second film has a second thickness. The second films with the first thickness and the second films with the second thickness are arranged alternately. Wherein, the first thickness d3 satisfies: 1nm ≤ d3 < 66nm, and the second thickness d4 satisfies: 66nm ≤ d4 ≤ 130nm.

[0082] In this implementation manner, by arranging the thicker first films and the thinner first films alternately, and arranging the thicker second films and the thinner second films alternately, it is beneficial to the process feasibility of coating the surface of the lens, thereby facilitating the alternate coating of the first film and the second film one by one.

[0083] In some possible implementation manners, the thickness of a single infrared filter film is less than or equal to 6μm.

[0084] In this implementation manner, the thickness of a single infrared filter film is less than or equal to 6μm to avoid the excessive thickness of a single infrared filter film. For the infrared filter film disposed on the lens, it can avoid excessive pulling force of a single infrared filter film on the lens, thereby avoiding the influence of the infrared filter film on the surface shape of the lens. For the infrared filter film disposed on the light-transmitting cover plate, it can not only avoid excessive pulling force of the infrared filter film on the light-transmitting cover plate, but also avoid affecting the appearance of the electronic device.

[0085] In some possible implementation manners, the multiple lenses include a plastic lens doped with a color masterbatch. The plastic lens doped with the color masterbatch is used to filter light in a first wavelength range, and the plastic lens doped with the color masterbatch is located on the image side of the first lens near the object side of the lens.

[0086] In this implementation manner, the infrared filter film disposed on the surface of the light-transmitting cover plate facing the lens and the plastic lens doped with the color masterbatch in the lens jointly realize the infrared filtering function, so that there is no need to set a filter in the camera module, which is beneficial to compressing the back focal length of the lens, and further reducing the thickness of the camera module, which is beneficial to the thin and light design.

[0087] In some other possible implementation manners, the infrared filter film disposed on the surface of the glass lens and the infrared filter film disposed on the surface of the light-transmitting cover plate facing the lens are jointly used to filter light in a second wavelength range.

[0088] In this implementation, due to the high hardness of the glass material, when an infrared filter film is provided on one surface of the glass lens, the surface shape variation of the glass lens is small or even without deformation. The infrared filter function is jointly achieved by the infrared filter film provided on the surface of the light-transmitting cover plate facing the lens, the plastic lens doped with color masterbatch in the lens, and the infrared filter film provided on the surface of the glass lens. As a result, there is no need to provide a filter in the camera module, which is beneficial to compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a thinner and lighter design.

[0089] In some possible implementations, the multiple lenses include a glass lens made of blue glass material. The glass lens made of blue glass material is used to filter light in the first wavelength range, and the glass lens made of blue glass material is the first lens or the second lens on the object side close to the lens.

[0090] In this implementation, the infrared filter function is jointly achieved by the infrared filter film provided on the surface of the light-transmitting cover plate facing the lens and the glass lens made of blue glass material in the lens. As a result, there is no need to provide a filter in the camera module, which is beneficial to compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a thinner and lighter design.

[0091] In some other possible implementations, the infrared filter film provided on the surface of the glass lens and the infrared filter film provided on the surface of the light-transmitting cover plate facing the lens are jointly used to filter light in the second wavelength range.

[0092] In this implementation, the infrared filter function is jointly achieved by the infrared filter film provided on the surface of the light-transmitting cover plate facing the lens, the glass lens made of blue glass material in the lens, and the infrared filter film provided on the surface of the glass lens. As a result, there is no need to provide a filter in the camera module, which is beneficial to compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a thinner and lighter design.

[0093] Among them, the glass lens with an infrared filter film provided on its surface and the glass lens made of blue glass material in the lens can be the same lens or different lenses. Description of the Drawings

[0094] Figure 1A is a schematic structural diagram of an electronic device provided by an embodiment of the present application in some embodiments;

[0095] Figure 1B is Figure 1A a partially exploded structural diagram of the electronic device shown;

[0096] Figure 2A is Figure 1A a schematic structural diagram of the camera module in the electronic device shown in some embodiments;

[0097] Figure 2B is Figure 1A Schematic diagram of the principle of light filtering by the lens in the camera module shown in some embodiments;

[0098] Figure 3A is Figure 2A Schematic diagram of the structure of a single infrared filter film in the camera module shown in some embodiments;

[0099] Figure 3B is Figure 3A Schematic diagram of the structure of the thickness distribution of each layer of the infrared filter film shown in some embodiments;

[0100] Figure 4A is Figure 1A Schematic diagram of the structure of the camera module in the electronic device shown in some other embodiments;

[0101] Figure 4B is Figure 1A Schematic diagram of the structure of the camera module in the electronic device shown in some other embodiments;

[0102] Figure 5A is Figure 1A Schematic diagram of the structure of the camera module in the electronic device shown in some other embodiments;

[0103] Figure 5B is Figure 1A Schematic diagram of the structure of the camera module in the electronic device shown in some other embodiments;

[0104] Figure 6A is Figure 4A Schematic diagram of the light transmitted through the lens in the camera module shown in different fields of view;

[0105] Figure 6B is Figure 6A Schematic diagram of the light filtering by the plastic lens doped with color masterbatch in the camera module shown;

[0106] Figure 6C is Figure 6A Schematic diagram of the light filtering by the infrared filter film disposed on the object side of the plastic lens doped with color masterbatch in the camera module shown;

[0107] Figure 6D is Figure 6B Schematic diagram of the light filtering by the infrared filter film disposed on the image side of the plastic lens doped with color masterbatch in the camera module shown;

[0108] Figure 6E is Figure 6A Schematic diagram of the light filtered by two infrared filter films together in the camera module shown;

[0109] Figure 6F is Figure 6A A schematic diagram showing the transmittance shift of light of different fields of view by the lens in the camera module shown;

[0110] Figure 7A A schematic diagram showing the light transmitted by the lens in the camera module in some embodiments at different fields of view in the prior art;

[0111] Figure 7B is Figure 7A A schematic diagram showing the transmittance shift of light of different fields of view by the lens in the camera module shown;

[0112] Figure 8A is when there is no light source Figure 6A The schematic diagram of the ratio of the transmittance of red light and green light of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0113] Figure 8B is when there is no light source Figure 6A The schematic diagram of the ratio of the transmittance of blue light and green light of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0114] Figure 8C is when there is no light source Figure 6A The schematic diagram of the comparison of the imaging color shadows of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0115] Figure 9A is when the light source is irradiating Figure 6A The schematic diagram of the ratio of the transmittance of red light and green light of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0116] Figure 9B is when the light source is irradiating Figure 6A The schematic diagram of the ratio of the transmittance of blue light and green light of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0117] Figure 9C is when the light source is irradiating Figure 6A The schematic diagram of the comparison of the imaging color shadows of different fields of view by the camera module in the embodiment shown and Figure 7A the prior art shown;

[0118] Figure 10 is Figure 4A The schematic diagram of the structure of the lens and the photosensitive element in the camera module in some embodiments shown;

[0119] Figure 11 is Figure 4A Schematic structural diagram of the lens and photosensitive element in the camera module shown in some other embodiments;

[0120] Figure 12 is Figure 4A Schematic structural diagram of the lens and photosensitive element in the camera module shown in still some other embodiments;

[0121] Figure 13A is Figure 1A Schematic structural diagram of the camera module in the electronic device shown in still some other embodiments;

[0122] Figure 13B is Figure 1A Schematic structural diagram of the camera module in the electronic device shown in still some other embodiments;

[0123] Figure 14A is Figure 1A Partial structural schematic diagram of the electronic device shown in some embodiments cut along A-A;

[0124] Figure 14B is Figure 1A Partial structural schematic diagram of the electronic device shown in some other embodiments cut along A-A;

[0125] Figure 15A is Figure 1A Partial structural schematic diagram of the electronic device shown in still some other embodiments cut along A-A;

[0126] Figure 15B is Figure 1A Partial structural schematic diagram of the electronic device shown in still some other embodiments cut along A-A;

[0127] Figure 16A is Figure 1A Partial structural schematic diagram of the electronic device shown in still some other embodiments cut along A-A;

[0128] Figure 16B is Figure 1A Partial structural schematic diagram of the electronic device shown in still some other embodiments cut along A-A. Detailed implementation manners

[0129] The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0130] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Multiple" means at least two.

[0131] The orientation terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", "top", "bottom", "side", etc., are only with reference to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the embodiments of the present application.

[0132] In the embodiments of the present application, the limitations on the relative position relationships mentioned, such as parallel, perpendicular, alignment, etc. These limitations are all in view of the current technological level and are not absolutely strict limitations. A small deviation is allowed, and approximate parallel, approximate perpendicular, approximate alignment, etc. are all acceptable. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B can be between 80 degrees and 100 degrees.

[0133] In the embodiments of the present application, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include one or more of such features.

[0134] For the convenience of understanding, the following first explains and describes the English abbreviations and related technical terms involved in the embodiments of the present application.

[0135] The optical axis is an axis that perpendicularly passes through the center of the lens. The lens optical axis is the axis that passes through the centers of the various lenses of the lens. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens should be such that all the light rays converge at a point behind the lens, and this point where all the light rays converge is the focal point.

[0136] The focal point is the convergence point of parallel light rays refracted by the lens or the lens system.

[0137] The focal length, also known as the focal distance, is a measure of the convergence or divergence of light in an optical system. It refers to the perpendicular distance from the optical center of the lens or the lens system to the focal plane when an infinitely distant scene forms a clear image on the focal plane through the lens or the lens system. From a practical perspective, it can be understood as the distance from the center of the lens to the plane when the object is at infinity. For a fixed-focus lens, the position of its optical center is fixed; for a telephoto lens, the change in the optical center of the lens brings about a change in the focal length of the lens.

[0138] The effective focal length (EFL) is the distance from the center of the lens to the focal point.

[0139] Object side: With the lens as the boundary, the side where the object to be photographed is located is the object side, and the surface of the lens close to the object side is called the object side surface.

[0140] Image side: With the lens as the boundary, the side where the image of the object to be photographed is located is the image side, and the surface of the lens close to the image side is called the image side surface.

[0141] Imaging plane: It is located on the image side of all the lenses in the lens, and is the plane where the light forms an image after passing through each lens in the lens in sequence.

[0142] Back focus length (FBL) of the lens: The distance from the image side surface of the last lens of the lens to the imaging plane.

[0143] Total track length (TTL): It refers to the total length from the surface of the lens closest to the object side to the imaging plane. TTL is the main factor in determining the height of the camera.

[0144] Relative illumination (RI): The ratio of the illumination at any point on the photosensitive element to the maximum illumination in the field of view.

[0145] Aperture diaphragm: It is a device used to control the amount of light passing through the lens and entering the photosensitive surface inside the camera body. It is usually inside the lens.

[0146] Chief ray angle (CRA): The chief ray angle is the angle between the chief ray and the parallel ray. The chief ray is the ray that exits from the edge of the object, passes through the center of the aperture diaphragm, and finally reaches the edge of the imaging plane.

[0147] Aperture value, also known as F-number (Fno): It is the relative value obtained by dividing the focal length of the lens by the diameter of the entrance pupil of the lens (the reciprocal of the relative aperture). The smaller the aperture value, the more light enters in the same unit time. The larger the aperture value, the smaller the depth of field, and the background content of the photo will be blurred, similar to the effect of a telephoto lens.

[0148] Abbe number: That is, the dispersion coefficient, which is the ratio of the difference in refractive indices of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0149] Field of view (FOV), in an optical instrument, is the angle formed by the two edges of the maximum range through which the image of the measured target can pass through the lens, with the vertex of the lens of the optical instrument as the vertex. The size of the field of view determines the field of vision of the optical instrument. The larger the field of view, the larger the field of vision and the smaller the optical magnification.

[0150] Color shading is the phenomenon that when shooting a uniformly bright image, the image gradually darkens unevenly from the center to the edge due to the different degrees of reflection of incident light by the lens from the center to the edge. This shading is manifested as the inconsistency of colors between the central area and the surrounding area of the image, that is, the RGB planes do not coincide.

[0151] Distortion, also known as aberration, is the degree of distortion of the image formed by an optical system with respect to the object itself. Distortion is due to the influence of the spherical aberration of the aperture stop. The height of the chief ray of different fields of view passing through the optical system and intersecting with the Gaussian image plane is not equal to the ideal image height, and the difference between the two is the distortion. Therefore, distortion only changes the imaging position of off-axis object points on the ideal plane, causing the shape of the image to be distorted, but does not affect the clarity of the image.

[0152] Please refer to Figure 1A and Figure 1B , Figure 1A which is a schematic structural diagram of the electronic device 100 provided by the embodiments of the present application in some embodiments; Figure 1B is Figure 1A a partial exploded structural diagram of the electronic device 100 shown.

[0153] In some embodiments, the electronic device 100 may be a mobile phone, a tablet personal computer, a laptop computer, a smart screen, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses or a VR helmet, etc., which are devices with a camera function. Figure 1A In the embodiments, the electronic device 100 is described as a non-foldable mobile phone as an example. Of course, other types of electronic devices 100 may also adopt a similar structure, such as a foldable mobile phone, which will not be elaborated hereinafter.

[0154] It can be understood that Figure 1A and Figure 1B Only some components included in the electronic device 100 are schematically shown, and the actual shape, actual size, actual position, and actual structure of these components are not limited by Figure 1A and Figure 1B . The electronic device 100 may also include more or fewer components compared to Figure 1A and Figure 1B .

[0155] In some embodiments, the electronic device 100 may include a camera module 10, a screen 20, and a back cover 30. Among them, the screen 20 is used to display images, videos, etc. The screen 20 may include a light-transmitting cover plate 201 and a display screen 202. The light-transmitting cover plate 201 and the display screen 202 are stacked and fixedly connected. The light-transmitting cover plate 201 is mainly used to protect the display screen 202 and prevent dust. The material of the light-transmitting cover plate 201 includes but is not limited to glass. The display screen 202 may be a flexible display screen or a rigid display screen. For example, the display screen 202 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0156] Exemplarily, the back cover 30 is used to protect the internal electronic components of the electronic device 100. The back cover 30 may include a rear cover 301 and a frame 302. The rear cover 301 is located on the side of the display screen 202 away from the light-transmitting cover plate 201, and is stacked with the light-transmitting cover plate 201 and the display screen 202. The frame 302 is fixed to the rear cover 301. Exemplarily, the frame 302 may be fixedly connected to the rear cover 301 by adhesive. The frame 302 may also be an integrally formed structure with the rear cover 301, that is, the frame 302 and the rear cover 301 are a whole structure. The frame 302 is located between the rear cover 301 and the light-transmitting cover plate 201. The light-transmitting cover plate 201 may be fixedly attached to the frame 302 by adhesive. The light-transmitting cover plate 201, the rear cover 301 and the frame 302 enclose the internal space 40 of the electronic device 100. The internal space 40 houses the display screen 202. Among them, the rear cover 301 may be made of materials such as metal, plastic, and glass. The rear cover 301 may be a plate body made of a single material, or a plate body structure made of multiple materials and spliced by multiple plates.

[0157] Exemplarily, the camera module 10 is used to take pictures / videos. Exemplarily, the camera module 10 is installed in the internal space 40. Among them, the camera module 10 may be used as a front camera. The screen 20 may have a light-transmitting area 203, and the light-transmitting area 203 is arranged corresponding to the light-incident surface of the camera module 10, so that the scene light can pass through the screen 20 and then be incident on the light-incident surface of the camera module 10. For example, the light-incident surface of the camera module 10 faces the light-transmitting cover plate 201. The display screen 202 is provided with a light path avoidance hole. The light path avoidance hole allows the scene light to pass through the light-transmitting cover plate 201 and then enter the light-incident surface of the camera module 10.

[0158] In some other embodiments, the camera module 10 may also be used as a rear camera. For example, the rear cover 301 is provided with a light-transmitting hole, and the light-incident surface of the camera module 10 is arranged corresponding to the light-transmitting hole, and the light-transmitting hole allows the scene light to enter the light-incident surface of the camera module 10. In some other embodiments, the electronic device 100 may further include one or more other camera modules 10 (not shown in the figure), and the embodiments of the present application do not make strict limitations on this.

[0159] In some embodiments, such as Figure 1B As shown, the electronic device 100 may further include a circuit board 50 and an image processor 60. The circuit board 50 and the image processor 60 are located inside the electronic device 100. The image processor 60 is fixed to the circuit board 50 and electrically connected to the circuit board 50. The image processor 60 is communicatively connected to the camera module 10. The image processor 60 is configured to obtain image data from the camera module 10 and process the image data. Among them, the communication connection between the camera module 10 and the image processor 60 may include data transmission through electrical connection means such as wiring, or data transmission may be achieved through coupling or other means. It can be understood that the camera module 10 and the image processor 60 may also be communicatively connected through other means capable of realizing data transmission.

[0160] In some embodiments, the electronic device 100 may further include an analog-to-digital converter (also referred to as an A / D converter, not shown in the figure). The analog-to-digital converter is connected between the camera module 10 and the image processor 60. The analog-to-digital converter is configured to convert the signal generated by the camera module 10 into a digital image signal and transmit it to the image processor 60, and then the image processor 60 processes the digital image signal, and finally the image or video is displayed through the screen 20.

[0161] In some embodiments, the electronic device 100 may further include a memory (not shown in the figure). The memory is communicatively connected to the image processor 60. After the image processor 60 processes the image digital signal, the image is transmitted to the memory so that the image can be retrieved from the memory at any time when it is necessary to view the image later and displayed on the screen 20. In some embodiments, the image processor 60 may also compress the processed image digital signal and then store it in the memory to save memory space.

[0162] In some other embodiments, the electronic device 100 may not include the screen 20.

[0163] It can be understood that Figure 1A and Figure 1B the installation position of the camera module 10 of the electronic device 100 in the illustrated embodiment is merely illustrative, and the present application does not strictly limit the installation position of the camera module 10. In some other embodiments, the camera module 10 may also be installed at other positions of the electronic device 100. For example, the camera module 10 may be installed at the upper left corner or the upper right corner of the front of the electronic device 100. In some other embodiments, the electronic device 100 may include a terminal body and an auxiliary component that can rotate, move, or be detached relative to the terminal body, and the camera module 10 may also be provided on the auxiliary component.

[0164] Please refer to Figure 2A and Figure 2B , Figure 2A is Figure 1A Schematic structural diagram of the camera module 10 in the electronic device 100 shown in some embodiments; Figure 2B is Figure 1A Schematic diagram of the principle of filtering light by the lens 1 in the camera module 10 shown in some embodiments.

[0165] In some embodiments, the camera module 10 may include a lens 1, an image sensor 2, and a lens barrel 3. Along the object side of the lens 1 pointing to the image side of the lens 1, the lens barrel 3 may include a first part 3a and a second part 3b arranged in layers. The first part 3a of the lens barrel 3 is used to house and mount the lens 1, and the second part 3b of the lens barrel 3 is used to house and mount the image sensor 2. Among them, the lens 1 can be used to filter light in the range of 700 nm to 1000 nm.

[0166] In this embodiment, the camera module 10 can filter light in the range of 700 nm to 1000 nm through the lens 1 to achieve the infrared filtering function, which can eliminate infrared interference, reduce or avoid image noise in low light conditions, improve the reduction degree of imaging details, and make the captured image more in line with the human eye's perception. Since the infrared filtering function can be achieved through the lens 1 without setting a traditional filter between the lens 1 and the image sensor 2, the degree of freedom of the back focus design of the lens 1 can be improved, thereby compressing the back focus space of the lens 1, reducing the overall optical length TTL, and further reducing the overall thickness of the camera module 10 to achieve the thin and light design of the camera module 10, which is beneficial to applying the camera module 10 to the electronic device 100 to achieve the thin and light design of the electronic device 100.

[0167] In addition, in this embodiment, since there is no need to set a traditional filter between the lens 1 and the image sensor 2, during the assembly process of the camera module 10, the process of attaching the filter is reduced, thus avoiding the risk of particles on glass (POG). Therefore, in the camera module 10 provided by the embodiments of the present application, there is no need to set a traditional filter. The lens 1 is installed in the first part 3a of the lens barrel 3, and the image sensor 2 is installed in the second part 3b of the lens barrel 3. Then, the first part 3a of the lens barrel 3 and the second part 3b of the lens 1 can be directly encapsulated, which can not only reduce the assembly process of the camera module 10 and improve the assembly efficiency, but also avoid the POG risk during the assembly process.

[0168] It should be noted that lens 1 can also be used to filter light in other wavelength ranges. For example, lens 1 can also be used to filter light in the range of 680nm to 1150nm, or 700nm to 1150nm, or 680nm to 1250nm, etc. As long as the light wavelength band filtered by lens 1 can achieve the infrared filtering function to reduce or even eliminate the interference of infrared rays on imaging. In the embodiments of the present application, taking lens 1 can be used to filter light in the range of 680nm to 1150nm as an example for illustration, it can be understood that the embodiments of the present application do not limit the light wavelength range filtered by lens 1, and in actual applications, it can be designed according to different camera specifications and application scenario requirements.

[0169] Exemplarily, lens 1 may include multiple lens elements 11 and at least two infrared filter films 12. The multiple lens elements 11 are arranged in the direction from the object side of lens 1 to the image side of lens 1. One of the multiple lens elements 11 is used to filter light in the first wavelength range. Infrared filter films 12 are respectively disposed on both surfaces of at least one of the multiple lens elements 11, and all the infrared filter films 12 are jointly used to filter light in the second wavelength range. Wherein, the union of the first wavelength range and the second wavelength range is the wavelength range filtered by lens 1. For example, the union of the first wavelength range and the second wavelength range is 680nm to 1250nm.

[0170] In this embodiment, the infrared filter films 12 are disposed on both surfaces of at least one lens element 11 to realize the installation and setting of at least two infrared filter films 12 in lens 1. By the lens element 11 that can filter light in the first wavelength range cooperating with at least two infrared filter films 12, the infrared filtering function of lens 1 is realized. In addition, by disposing the infrared filter films 12 on both surfaces of the lens element 11, the pulling forces on both surfaces of the lens element 11 by the infrared filter films 12 can be at least partially offset, thereby reducing or even eliminating the external force on lens 1 due to coating, and further reducing or even eliminating the influence of surface shape variation caused by coating.

[0171] For example, as Figure 2B shown, the dashed line is the transmittance of light with different wavelengths by the lens element 11 having infrared filtering function, the dash-dotted line is the transmittance of light with different wavelengths under the combined action of all the infrared filter films 12, and the solid line is the transmittance of light with different wavelengths by the whole lens 1. The first wavelength range is 680nm to 750nm, the second wavelength range is 750nm to 1150nm, and lens 1 can achieve the filtering of light with wavelengths from 680nm to 1150nm.

[0172] It should be noted that Figure 2B The filtering curve of the shown lens 1 for light of different wavelengths is only schematic and does not limit the cut-off degree of lens 1 for light of different wavelengths.

[0173] Among them, the minimum value in the first wavelength range can be less than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is less than the maximum value in the second wavelength range. In other words, the lens 11 capable of filtering light in the first wavelength range is used to filter light with shorter wavelengths, and the infrared filtering film 12 is used to filter light with longer wavelengths.

[0174] In this embodiment, by using the infrared filtering film 12 in combination with the lens 11 capable of filtering light in the first wavelength range, the complementarity of filtering light with longer wavelengths and shorter wavelengths is achieved, thereby improving the infrared light filtering ability of the lens 1, and further improving the imaging quality of the camera module 10.

[0175] Among them, there may be an intersection between the first wavelength range and the second wavelength range, which is beneficial to achieving the cut-off depth effect of the wavelength in the intersection range of the first wavelength range and the second wavelength range, thereby avoiding the light leakage phenomenon of the lens 1 for light of some wavelengths, and further ensuring the infrared light filtering quality of the lens 1 to improve the imaging quality of the camera module 10. For example, the first wavelength range can be 680nm to 950nm, and the second wavelength range is 750nm to 1150nm.

[0176] Among them, there may be a wavelength range intersection in the wavelength ranges of at least two infrared filtering films 12 for filtering light, which is beneficial to improving the cut-off depth effect of the light in the second wavelength range after all the infrared filtering films 12 are combined, thereby improving the infrared filtering effect of the lens 1, and further improving the imaging effect of the camera module 10. For example, the wavelength range intersection includes 850nm, which can ensure the cut-off depth effect of the lens 1 for light of 850nm, thereby preventing the risk of warm yellowish imaging when large-angle light is incident.

[0177] Among them, the ratio of the extreme difference value of the wavelength range intersection to the extreme difference value of the wavelength range of the lens 1 for filtering light can be greater than or equal to 50%, so as to improve the cut-off depth effect of the lens 1 for infrared light, thereby improving the imaging effect of the camera module 10. Among them, the extreme difference value refers to the difference between the maximum value and the minimum value within the wavelength range.

[0178] For example, among at least two infrared filter films 12, one infrared filter film 12 can filter light with wavelengths from 700 nm to 1050 nm, and the other infrared filter film 12 can filter light with wavelengths from 800 nm to 1150 nm. Then the intersection of the wavelength ranges is from 800 nm to 1050 nm, and the difference value is 250 mm. The lens 1 can filter light with wavelengths from 680 nm to 1150 nm, so the difference value of the wavelength range of the light filtered by the lens 1 is 470 nm, and the ratio of the two is 250 nm / 470 nm = 53.19%.

[0179] In some embodiments, the first lens 11 on the object side close to the lens 1 is a glass lens 111, and the overall optical length TTL of the lens 1 satisfies: TTL < 2.25 mm. For example, the overall optical length TTL of the lens 1 can be, but is not limited to, 1.5 mm, or 1.7 mm, or 1.9 mm, or 2.1 mm, or 2.25 mm, or other values less than 2.25 mm.

[0180] In this embodiment, the first lens 11 being a glass lens 111 is beneficial to compressing the overall height of the lens 1. By designing the overall optical length TTL of the lens 1, the overall lens 1 is thinner, which is beneficial to the thin and light design of the camera module 10, and thus beneficial to applying the camera module 10 to the electronic device 100 to enable the electronic device 100 to achieve a thin and light design.

[0181] Among them, the overall optical length TTL of the lens 1 and the focal length EFL of the lens 1 satisfy: EFL / TTL > 0.8. For example, EFL / TTL can be, but is not limited to, 0.86, or 0.87, or 0.88, or other values greater than 0.8.

[0182] In this embodiment, by limiting the overall length TTL of the lens 1 and the focal length EFL of the lens 1, the long - focal - length shooting requirements of the lens 1 and the requirement of a short overall length can be taken into account, which is beneficial to the thin and light design of the lens 1.

[0183] Among them, the back - focal length FBL of the lens 1 satisfies: FBL < 0.5 mm. For example, the back - focal length FBL of the lens 1 can be, but is not limited to, 0.45 mm, or 0.35 mm, or 0.25 mm, or 0.15 mm, or other values less than 0.5 mm.

[0184] In this embodiment, by designing the back - focal length FBL of the lens 1, after canceling the filter in the camera module 10, the back - focal length of the lens 1 is compressed to reduce the height of the lens 1, which is beneficial to the thin and light design of the camera module 10.

[0185] Among them, the back - focal length FBL of the lens 1 and the overall optical length TTL of the lens 1 satisfy: 0.1 <fbl ttl>0.3. For example, the value of FBL / TTL may be, but is not limited to, 0.12, or 0.16, or 0.2, or 0.24, or 0.28, or other values between 0.1 and 0.3.

[0186] In this embodiment, by defining the ratio of the back focal length FBL of the lens 1 to the total optical length TTL of the lens 1, the distance between the lens 1 and the photosensitive element 2 can meet the imaging requirements, and by controlling the value of the back focal length FBL of the lens 1 within a relatively small range, it is beneficial to the thin and light design of the lens 1, and thus beneficial to the thin and light design of the camera module 10.

[0187] Among them, the field of view angle FOV of the lens 1 satisfies: 80° < FOV < 110°. For example, the field of view angle FOV of the lens 1 may be, but is not limited to, 81°, or 85°, or 90°, or 95°, or 100°, or 105°, or 108°, or other values between 80° and 110°.

[0188] In this embodiment, by defining the range of the field of view angle FOV, the field of view size and optical magnification of the lens 1 can be kept appropriate.

[0189] Among them, the Abbe number of at least two of the multiple lenses 11 is greater than 55, so that the chromatic aberration of the lens 1 is small, which is beneficial to the imaging effect of the camera module 10.

[0190] In some examples, the lens 1 may include 4 lenses 11. Along the direction from the object side of the lens 1 to the image side of the lens 1, the 4 lenses 11 are successively a glass lens 111, a plastic lens 112, a plastic lens 112, and a plastic lens 112.

[0191] In this embodiment, by designing the structure of the lens 1 as a 1G + 3P structure, it is beneficial to reduce the overall height of the lens 1. Among them, G represents a glass lens and P represents a plastic lens.

[0192] Among them, the refractive index of the second lens 11 close to the object side of the lens 1 is the highest. For example, along the direction from the object side of the lens 1 to the image side of the lens 1, the refractive index of the first lens 11 is 1.48 and the Abbe number is 78.0; the refractive index of the second lens 11 is 1.67 and the Abbe number is 19.2; the refractive index of the third lens 11 is 1.54 and the Abbe number is 55.9; the refractive index of the fourth lens 11 is 1.54 and the Abbe number is 55.9.

[0193] In this embodiment, by designing the refractive index of the second lens 11 located on the object side of the lens 1 to be the highest, it is beneficial to achieve a better imaging effect.

[0194] In some other examples, the lens 1 may include 4 plastic lenses 112.

[0195] In this embodiment, through the all-plastic lens design, a 4P architecture is formed, which can reduce the overall manufacturing process of the lens 1, thereby reducing the production cost.

[0196] It should be noted that the number of lenses 11 in the lens 1 is not limited in the embodiments of the present application. Figure 2A In the illustrated embodiment, the lens 1 with a 1G + 3P architecture is only for illustration. In some other embodiments, the lens 1 can also have other architectures, and the lens 1 can also include other numbers of lenses 11.

[0197] For example, the lens 1 can include 4 lenses 11. The first lens 11 and the second lens 11 near the object side of the lens 1 are glass lenses 111, and the remaining two are plastic lenses 112, forming a 2G + 2P architecture, etc.

[0198] Again, for example, the lens 1 can include 5 lenses 11. The first lens 11 near the object side of the lens 1 is a glass lens 111, and the remaining four lenses 11 are plastic lenses 112, forming a 1G + 4P architecture; or, the first lens 11 and the second lens 11 near the object side of the lens 1 are glass lenses 111, and the remaining three are plastic lenses 112, forming a 2G + 3P architecture, etc.

[0199] In some other embodiments, when the lens 1 includes glass lenses 111, the infrared filter film 12 can also be disposed on both side surfaces of the glass lenses 111 to filter the light in the second wavelength range.

[0200] In some embodiments, the lens 1 can also include an aperture stop and a spacer ring.

[0201] Among them, the aperture stop can adjust the aperture and can improve the imaging quality of the camera module 10. For example, the aperture stop can be installed between the second lens 11 and the third lens 11 near the object side of the lens 1. In some other embodiments, the aperture stop can also be installed at other positions of the lens 1, and the embodiments of the present application do not strictly limit this.

[0202] Among them, the spacer ring is disposed between two adjacent lenses 11 and is used to support the two adjacent lenses 11 to ensure the stable installation of each lens 11 in the lens 1.

[0203] Please refer to Figure 2A 、 Figure 3A and Figure 3B , Figure 3A is Figure 2A the schematic structural diagram of a single infrared filter film 12 in the illustrated camera module 10 in some embodiments; Figure 3B is Figure 3A Schematic diagram of the film thickness distribution of each layer of the infrared filter film 12 shown in some embodiments. It should be noted that for the convenience of illustration, Figure 3A and Figure 3B the thicknesses of the respective film layers in

[0204] are schematically shown in an enlarged manner.

[0205] In some embodiments, a single infrared filter film 12 may include multiple layers of first films 121 and multiple layers of second films 122, and the multiple layers of first films 121 and the multiple layers of second films 122 are arranged alternately one by one. Among them, the refractive index of each layer of the first film 121 is greater than or equal to 2, and the refractive index of each layer of the second film 122 is less than 2.

[0206] In this embodiment, by alternately arranging the first film 121 with a relatively high refractive index and the second film 122 with a relatively low refractive index one by one, the filtering effect on infrared light is improved, and the transmission effect of visible light is improved, thereby improving the imaging quality of the camera module 10. For example, the first film 121 may be TiO2, and the second film 122 may be SiO2.

[0206] Exemplarily, the thickness d1 of each layer of the first film 121 satisfies: 1nm ≤ d1 ≤ 130nm, and the thickness d2 of each layer of the second film 122 satisfies: 1nm ≤ d2 ≤ 130nm. In this embodiment, by setting the thicknesses of the first film 121 and the second film 122, each layer of the first film 121 and each layer of the second film 122 can realize the function of infrared filtering, so that the multiple layers of first films 121 and the multiple layers of second films 122 can cooperate to realize the filtering function of the single infrared filter film 12.

[0207] For example, the thickness of each layer of the first film 121 may be, but is not limited to, 1nm, or 10nm, or 25nm, or 40nm, or 60nm, or 85nm, or 90nm, or 105nm, or 120nm, or 130nm, or other values between 1nm and 130nm. The thickness of each layer of the second film 122 may be, but is not limited to, 1nm, or 12nm, or 28nm, or 44nm, or 63nm, or 87nm, or 91nm, or 107nm, or 122nm, or 130nm, or other values between 1nm and 130nm.

[0208] If the thickness of the first film 121 is less than 1nm or greater than 130nm, it will cause this layer of the first film 121 to be unable to realize the filtering of infrared light, thereby affecting the infrared filtering function of the single infrared filter film 12. If the thickness of the second film 122 is less than 1nm or greater than 130nm, it will cause this layer of the second film 122 to be unable to realize the filtering of infrared light, thereby affecting the infrared filtering function of the single infrared filter film 12.

[0209] Among them, some of the first films 121 in the multi-layer first film 121 may have a first thickness, and some of the other first films 121 may have a second thickness. The first films 121 with the first thickness and the first films 121 with the second thickness are alternately arranged. Some of the second films 122 in the multi-layer second film 122 have a first thickness, and some of the other second films 122 have a second thickness. The second films 122 with the first thickness and the second films 122 with the second thickness are alternately arranged. Among them, the first thickness d3 satisfies: 1 nm ≤ d3 < 66 nm, and the second thickness d4 satisfies: 66 nm ≤ d4 ≤ 130 nm.

[0210] In this embodiment, by arranging the thicker first films 121 and the thinner first films 121 alternately, and arranging the thicker second films 122 and the thinner second films 122 alternately, it is beneficial to the process feasibility of coating on the surface of the lens 11, thereby facilitating the alternate coating of the first film 121 and the second film 122 one by one.

[0211] It should be noted that the alternate arrangement of the first films 121 with the first thickness and the first films 121 with the second thickness may be an alternate arrangement of the first films 121 with the first thickness and the first films 121 with the second thickness one by one, or an alternate arrangement of one first film 121 with the first thickness and two first films 121 with the second thickness, or an alternate arrangement of two first films 121 with the first thickness and one first film 121 with the second thickness, or a combination of multiple alternate rules, as long as the arrangement rule of the multi-layer first films 121 conforms to the alternate thickness.

[0212] Among them, the alternate arrangement of one first film 121 with the first thickness and two first films 121 with the second thickness means that one first film 121 with the first thickness and two first films 121 with the second thickness are alternately arranged. The alternate arrangement of two first films 121 with the first thickness and one first film 121 with the second thickness means that two first films 121 with the first thickness and one first film 121 with the second thickness are alternately arranged. By analogy, it will not be elaborated in other alternate rules.

[0213] Similarly, the alternate arrangement of the second films 122 with the first thickness and the second films 122 with the second thickness may be an alternate arrangement of the second films 122 with the first thickness and the second films 122 with the second thickness one by one, or an alternate arrangement of one second film 122 with the first thickness and two second films 122 with the second thickness, or an alternate arrangement of two second films 122 with the first thickness and one second film 122 with the second thickness, or a combination of multiple alternate rules, as long as the arrangement rule of the multi-layer second films 122 conforms to the alternate thickness.

[0214] For example, as Figure 3B As shown, in an infrared filter film 12, the first film 121 is arranged such that the first films 121 with a first thickness and the first films 121 with a second thickness are arranged alternately one by one, and also includes the first films 121 with a first thickness and the first films 121 with a second thickness arranged alternately one and two. The second film 122 is arranged such that the second films 122 with a first thickness and the second films 122 with a second thickness are arranged alternately one by one, and also includes the second films 122 with a first thickness and the second films 122 with a second thickness arranged alternately two by one.

[0215] It should be noted that Figure 3B In the infrared filter film 12 shown, the layer number and thickness distribution law of the first film 121 and the second film 122 are only for illustration, and do not limit the layer number and thickness distribution law of the infrared filter film 12 in this application.

[0216] Exemplarily, the thickness of a single infrared filter film 12 is less than or equal to 6 μm to avoid excessive thickness of a single infrared filter film 12, which may cause excessive pulling force of a single infrared filter film 12 on the lens 11, thereby avoiding the influence of the infrared filter film 12 on the surface shape of the lens 11. For example, the thickness of a single infrared filter film 12 can be 1 μm, or 2 μm, or 3 μm, or 4 μm, or 5 μm, or 6 μm, or other values less than 6 μm.

[0217] Among them, the thickness of each part of a single infrared filter film 12 is the same, so that the light filtering effect of each part of a single infrared filter film 12 is consistent, which is beneficial to improving the stability of light filtering.

[0218] Among them, in the two infrared filter films 12 arranged on the two side surfaces of the same lens 11, the ratio of the thickness of one infrared filter film 12 to the thickness of the other infrared filter film 12 is in the range of 1 to 1.2.

[0219] In this embodiment, the thickness difference between the two infrared filter films 12 arranged on the two side surfaces of the same lens 11 is small, so that the difference in the pulling force of the two infrared filter films 12 on the surface of the lens 11 is small, which is beneficial to making the pulling forces of the two infrared filter films 12 on the lens 11 cancel each other out, thereby reducing or even eliminating the influence of coating on the two side surfaces of the lens 11 on the surface shape variation of the lens 11.

[0220] For example, among the two infrared filter films 12 disposed on the two side surfaces of the same lens 11, the ratio of the thickness of one infrared filter film 12 to the thickness of the other infrared filter film 12 can be 1, or 1.05, or 1.1, or 1.15, or 1.2, or other values between 1 and 1.2. For example, the thickness of one infrared filter film 12 is 3212 nm, and the sum of the number of layers of the first film 121 and the second film 122 is 54 layers; the thickness of the other infrared filter film 12 is 2886 nm, and the sum of the number of layers of the first film 121 and the second film 122 is 36 layers.

[0221] Please refer to Figure 2A , Figure 4A and Figure 4B , Figure 4A is Figure 1A a schematic structural diagram of the camera module 10 in some other embodiments of the electronic device 100 shown in Figure 4B is Figure 1A a schematic structural diagram of the camera module 10 in still some other embodiments of the electronic device 100 shown in. It should be noted that Figure 4A and Figure 4B the camera module 10 shown in the embodiments may include Figure 2A some technical features of the camera module 10 shown in the embodiments. The following mainly describes the differences between the two, and the same parts of the two will not be described again.

[0222] In some embodiments, the multiple lenses 11 may include at least one plastic lens 112, and the infrared filter film 12 is disposed on the two side surfaces of one plastic lens 112.

[0223] In this embodiment, the plastic lens 112 is easy to be prepared by the process, which is beneficial to reducing the preparation difficulty of the lens 1. By disposing the infrared filter films 12 on the two side surfaces of the plastic lens 112, the pulling forces of the infrared filter films 12 on the two side surfaces of the plastic lens 112 can be at least partially offset, thereby reducing or even eliminating the surface profile variation caused by the surface coating of the plastic lens 112.

[0224] Exemplarily, the plastic lens 112 provided with the infrared filter film 12 is located on the image side of the first lens 11 on the object side of the lens 1.

[0225] In this embodiment, the plastic lens 112 provided with the infrared filter film 12 is not arranged as the first lens on the object side of the lens 1, which can prevent the light incident angle on the image side of the first lens 11 from being too large, resulting in the spectral transmittance drift of different fields of view, thereby avoiding the increase of the color shading risk. In addition, if the plastic lens 112 provided with the infrared filter film 12 is arranged as the first lens on the object side of the lens 1, it will also cause the ID side of the lens 1 to turn red, resulting in the ID risk, and the first lens 11 of the lens 1 being a plastic lens 112 is not conducive to the thin and light design of the lens 1.

[0226] Among them, the number of lenses 1 is at least 4, and the infrared filter film 12 is arranged on both surfaces of the first lens 11 close to the image side of the lens 1 (please refer to Figure 2A ), or the infrared filter film 12 is arranged on both surfaces of the second lens 11 close to the image side of the lens 1 (please refer to Figure 4A ), or the infrared filter film 12 is arranged on both surfaces of the third lens 11 close to the image side of the lens 1 (please refer to Figure 4B ).

[0227] In this embodiment, according to the geometric optical principle, on the object side and image side of the first, second, and third lenses 11 close to the image side of the lens 1, the main light incident angle is relatively small. Therefore, the spectral offset of the spectral curve of the infrared filter film 12 on the object side and image side of the first, second, and third lenses 11 close to the image side of the lens 1 is also small, which can reduce the offset of the infrared filter film 12 in different fields of view, thereby reducing the risk of color cast, further reducing the drop value of the color shading curve of the infrared filter film 12, and while reducing the color correction pressure, making the color of the imaging of the camera module 10 more natural and real.

[0228] Please refer back to Figure 2A 、 Figure 4A and Figure 4B . In some embodiments, multiple lenses 11 may include a plastic lens 112 doped with color masterbatch, and the plastic lens 112 doped with color masterbatch is used to filter light in the first wavelength range. Among them Figure 2A 、 Figure 4A and Figure 4B , the lenses 11 with hatching and squares in the illustrated embodiments are plastic lenses 112 doped with color masterbatch.

[0229] In this embodiment, a masterbatch is doped in a plastic lens 112, so that the plastic lens 112 doped with the masterbatch can filter part of the infrared rays, that is, can filter the light in the first wavelength range, and the plastic lens 112 doped with the masterbatch can also absorb ultraviolet rays or part of the blue light band, thereby improving the risk of false color caused by the cancellation of the filter in the camera module 10.

[0230] It should be noted that the masterbatch is a mixture of resin and a large amount of pigments (up to 50%) or dyes formulated into a high-concentration color.

[0231] Exemplarily, the plastic lens 112 doped with the masterbatch can be located on the image side of the first lens 11 near the object side of the lens 1, so as to avoid the plastic lens 112 doped with the masterbatch affecting the appearance of the camera module 10 due to its own color.

[0232] Among them, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens 112 doped with the masterbatch is in the range of 1 to 1.15, so that the difference in the effective thickness of each part of the plastic lens 112 doped with the masterbatch is small, and the consistency of the light filtering effect of each part of the plastic lens 112 doped with the masterbatch can be improved. For example, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens 112 doped with the masterbatch can be 1, or 1.03, or 1.06, or 1.09, or 1.12, or 1.15, or other values between 1 and 1.15.

[0233] It should be noted that the effective thickness of the plastic lens 112 doped with the masterbatch refers to the thickness of the part of the plastic lens 112 doped with the masterbatch that is used to transmit light.

[0234] Among them, the number of lenses 1 can be at least 4, and the plastic lens 112 doped with the masterbatch can be the second lens 11 or the third lens 11 on the object side of the lens 1.

[0235] In this embodiment, in the design of the lens 1, generally, the difference in the effective thickness of the second lens 11 or the third lens 11 near the object side of the lens 1 is small. By designing the second lens 11 or the third lens 11 near the object side of the lens 1 as the plastic lens 112 and doping the masterbatch, the consistency of the light filtering effect of each part of the plastic lens 112 doped with the masterbatch can be improved.

[0236] In some examples (please refer to Figure 4A ), the plastic lens 112 doped with the masterbatch and the plastic lens 112 with infrared filter films 12 provided on both sides are the same plastic lens 112.

[0237] In this embodiment, since the effective thickness difference of the plastic lens 112 doped with the color masterbatch is small, the surface flatness of the plastic lens 112 doped with the color masterbatch is relatively high, thereby reducing the process difficulty of setting the infrared filter film 12 on both surfaces of the plastic lens 112 doped with the color masterbatch.

[0238] In some other examples (please refer to Figure 2A and Figure 4B ), the plastic lens 112 doped with the color masterbatch and the plastic lens 112 with the infrared filter film 12 provided on both surfaces are different plastic lenses 112.

[0239] In this embodiment, the plastic lens 112 with the infrared filter film 12 provided on both surfaces can be located on the image side or the object side of the plastic lens 112 doped with the color masterbatch, improving the flexibility of the relative position design of the plastic lens 112 with the infrared filter film 12 provided on both surfaces and the plastic lens 112 doped with the color masterbatch. It can be flexibly designed according to the arrangement spacing of each lens 11 in the lens 1 and the actual application requirements.

[0240] Please refer to Figure 2A 、 Figure 5A and Figure 5B , Figure 5A which Figure 1A is a schematic structural diagram of the camera module 10 in some other embodiments of the electronic device 100 shown; Figure 5B which Figure 1A is a schematic structural diagram of the camera module 10 in some other embodiments of the electronic device 100 shown. It should be noted that Figure 5A and Figure 5B the camera module 10 shown in the embodiments can include Figure 2A 、 Figure 4A and Figure 4B part of the technical features of the camera module 10 shown in the embodiments. The following mainly describes the differences between the two, and the same parts of the two will not be elaborated.

[0241] In some embodiments, the infrared filter film 12 can be provided on both surfaces of multiple plastic lenses 112.

[0242] In this embodiment, setting the infrared filter film 12 on both surfaces of multiple plastic lenses 112 can reduce the thickness of a single infrared filter film 12, thereby reducing the thickness of the infrared filter film 12 on both surfaces of each plastic lens 112. Furthermore, during the process of plating the infrared filter film 12 on both surfaces of the plastic lens 112, the pulling force exerted on the plastic lens 112 when plating the first infrared filter film 12 is reduced, so as to reduce the surface shape variation of the plastic lens 112 during the plating of the infrared filter film 12.

[0243] For example, lens 1 may include four lens elements 11. In the direction from the object side of lens 1 to the image side of lens 1, an infrared filter film 12 may be disposed on both side surfaces of the third lens element 11 and both side surfaces of the fourth lens element 11 (please refer to Figure 5A ); the infrared filter film 12 may also be disposed on both side surfaces of the second lens element 11, both side surfaces of the third lens element 11, and both side surfaces of the fourth lens element 11 (please refer to Figure 5A ), etc.

[0244] Please refer to Figure 6A , Figure 6A which is Figure 4A a schematic diagram of the light passing through lens 1 of camera module 10 at different fields of view.

[0245] In some embodiments, lens 1 may include four lens elements 11. In the direction from the object side of lens 1 to the image side of lens 1, they are successively a glass lens 111, a plastic lens 112, a plastic lens 112 doped with color masterbatch, a plastic lens 112, and a photosensitive element 2. Among them, infrared filter films 12 are disposed on both side surfaces of the plastic lens 112 doped with color masterbatch.

[0246] Among them, in the direction from the center of photosensitive element 2 to the edge of photosensitive element 2, the different beams of light converging to photosensitive element 2 are the light at fields of view 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F, respectively.

[0247] Among them, the thickness of the infrared filter film 12 disposed on the object side surface of the plastic lens 112 doped with color masterbatch is 3212 nm, and the thickness of the infrared filter film 12 disposed on the image side surface of the plastic lens 112 doped with color masterbatch is 2886 nm. For the film layer information of the infrared filter films 12 disposed on both side surfaces of the plastic lens 112 doped with color masterbatch, please refer to Table 1a and Table 1b. Table 1a is the film layer information of the infrared filter film 12 disposed on the object side surface of the plastic lens 112 doped with color masterbatch, and Table 1b is the film layer information of the infrared filter film 12 disposed on the image side surface of the plastic lens 112 doped with color masterbatch. Among them, the layer number represents the film layer sequence number in the infrared filter film 12 in the direction from the surface of lens element 11 to the direction away from lens element 11. The units of both the physical thickness and the optical thickness are nm. FWOT is the equivalent physical thickness in the optical thin film design software OptiLayer, QWOT is the equivalent optical thickness in the optical thin film design software OptiLayer, and the materials are the first film (TiO2) and the second film (SiO2).

[0248] Table 1a

[0249]

[0250]

[0251] Table 1b

[0252]

[0253]

[0254] Please refer to in conjunction with Figure 6B 、 Figure 6C and Figure 6D , Figure 6B is Figure 6A a schematic diagram of the light filtering by the plastic lens 112 doped with color masterbatch in the camera module 10 shown; Figure 6C is Figure 6A a schematic diagram of the light filtering by the infrared filter film 12 disposed on the object side of the plastic lens 112 doped with color masterbatch in the camera module 10 shown; Figure 6D is Figure 6B a schematic diagram of the light filtering by the infrared filter film 12 disposed on the image side of the plastic lens 112 doped with color masterbatch in the camera module 10 shown.

[0255] Among them, the plastic lens doped with color masterbatch can filter light with wavelengths from 680 nm to 750 nm, the infrared filter film disposed on the object side of the plastic lens doped with color masterbatch can filter light with wavelengths from 750 nm to 1050 nm, and the infrared filter film disposed on the image side of the plastic lens doped with color masterbatch can filter light with wavelengths from 850 nm to 1150 nm.

[0256] Among them, Figure 6C is the schematic diagram of the light filtering simulation of the infrared filter film corresponding to Table 1a, Figure 6D is the schematic diagram of the light filtering simulation of the infrared filter film corresponding to Table 1b. Figure 6C and Figure 6D In and, Ta0° represents the light perpendicular to the lens, corresponding to the dark lines in the figure, and Ta30° represents the light with an angle of 30° with the normal of the lens surface, corresponding to the light lines in the figure. From Figure 6C and Figure 6D it can be seen that the infrared filter film has a good infrared filtering effect on light with different incident angles.

[0257] Please refer to in conjunction with Figure 6E and Figure 6F , Figure 6E is Figure 6A a schematic diagram of the light filtering jointly by two infrared filter films 12 in the camera module 10 shown; Figure 6F is Figure 6A a schematic diagram of the transmittance shift of the light with different fields of view by the lens 1 in the camera module 10 shown.

[0258] Among them, Figure 6E Ta0° represents the light perpendicular to the surface of the lens, corresponding to the dark lines in the figure, and Ta30° represents the light with an angle of 30° with the normal of the surface of the lens, corresponding to the light lines in the figure.

[0259] Among them, Figure 6F The multiple lines in it represent the transmittance of the light of different fields of view by the lens, corresponding to the visible light wavelength range, and the transmittance corresponds to the light of the 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F fields of view from high to low in sequence.

[0260] From Figure 6E It can be seen that the two infrared filter films can jointly achieve the filtering of the light with wavelengths from 750nm to 1150nm, and can achieve good infrared filtering effects for the light with different incident angles.

[0261] From Figure 6F It can be seen that Figure 6A The lens 1 shown in the embodiment can achieve the filtering of the light with wavelengths from 680nm to 1150nm for the light of different fields of view, and has a good cut-off depth effect on the light with wavelengths from 680nm to 1150nm.

[0262] Please refer to Figure 6F , Figure 7A and Figure 7B , Figure 7A which is a schematic diagram of the light transmitted by the lens 1 in the camera module 10 in some embodiments of the prior art under different fields of view; Figure 7B is Figure 7A a schematic diagram of the transmittance shift of the light of different fields of view by the lens 1 in the camera module 10 shown.

[0263] In a prior art, the lens 1 includes 4 lens elements 11. Along the direction from the object side of the lens 1 to the image side of the lens 1, the camera module 10 includes a glass lens element 111, plastic lens elements 112, plastic lens elements 112, plastic lens elements 112, a filter 200, and a photosensitive element 2. Among them, the filter 200 can achieve the filtering of the light with wavelengths from 680nm to 1150nm, and the sizes of the respective lens elements 11 in the lens 1 are the same as those of Figure 6A the respective lens elements 11 in the lens 1 in the embodiment shown.

[0264] Among them, along the direction from the center of the photosensitive element 2 to the edge of the photosensitive element 2, the different bundles of light converging to the photosensitive element 2 are the light of the 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F fields of view respectively.

[0265] Among them, Figure 7B The multiple lines therein represent the transmittance of the light of lens 1 for different fields of view, corresponding to the visible light wavelength range. The transmittance corresponds to the light of fields of view 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F in descending order from high to low.

[0266] By comparing Figure 6F and Figure 7B it can be seen that Figure 6A the lens 1 shown in the embodiment can filter the light with the same wavelength band as that of the Figure 7A prior art shown, and can achieve infrared filtering for the light of each field of view. Moreover, Figure 6A the difference value of the transmittance of the visible light of the lens 1 shown in the embodiment for each field of view is smaller, achieving a better transmittance effect for the visible light. Therefore, the lens 1 provided in the embodiment of the present application cancels the filter 200 in the prior art, realizing the thinning design of the camera module 10. At the same time, it can not only achieve the same infrared filtering effect, but also reduce the difference in the transmittance of the visible light in the light of each field of view, thereby achieving better imaging.

[0267] Please refer to Figures 8A to 8C , Figure 8A which is a schematic diagram of the ratio of the transmittance of red light and green light of the camera module 10 for different fields of view in the Figure 6A embodiment shown and the Figure 7A prior art shown when there is no light source; Figure 8B which is a schematic diagram of the ratio of the transmittance of blue light and green light of the camera module 10 for different fields of view in the Figure 6A embodiment shown and the Figure 7A prior art shown when there is no light source; Figure 8C which is a schematic diagram of the comparison of the imaging color shadows of the light of the camera module 10 for different fields of view in the Figure 6A embodiment shown and the Figure 7A prior art shown when there is no light source.

[0268] Among them, Figures 8A to 8C in Figures 8A to 8C , R / G represents the ratio of the transmittance of red light to the transmittance of green light, B / G represents the ratio of the transmittance of blue light to the transmittance of green light, Shading represents the color shadow, and Figures 8A to 8C in Figure 6A the abscissa is the field of view, specifically the fields of view 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F. Figures 8A to 8C In Figure 6A , the light-colored curve corresponds to the Figure 7A embodiment, and the dark-colored curve corresponds to the

[0269] Please refer to Table 2a. Table 2a is Figures 8A to 8C The weighted values of R / G, B / G, and shading corresponding to multiple fields of view can be obtained. As can be seen from Figures 8A to 8C , and Table 2a, Figure 6A Compared with the Figure 7A prior art, the decrease in the ratio of the transmittance of red light to green light of lens 1 for different fields of view is significantly smaller, which can reduce the impact on RI. In addition, Figure 6A compared with the Figure 7A prior art, the Shading drop value of lens 1 for different fields of view is significantly smaller, which can reduce the influence of color deviation.

[0270] Table 2a

[0271] Field of view weight comparison Figure 7A Prior art Figure 6A Embodiment R / G 0.969 1.011 B / G 1.006 1.004 Shading 0.812 0.959

[0272] Please refer to Figures 9A to 9C , Figure 9A which is a schematic diagram of the ratio of the transmittance of red light to green light of camera module 10 for different fields of view in the Figure 6A illustrated embodiment and the Figure 7A illustrated prior art when illuminated by a light source; Figure 9B which is a schematic diagram of the ratio of the transmittance of blue light to green light of camera module 10 for different fields of view in the Figure 6A illustrated embodiment and the Figure 7A illustrated prior art when illuminated by a light source; Figure 9C which is a schematic diagram of the comparison of the imaging color shadows of the light for different fields of view of camera module 10 in the Figure 6A illustrated embodiment and the Figure 7A illustrated prior art when illuminated by a light source.

[0273] Among them, the light source is a D65 light source, which is a standard artificial light source with a color temperature of 6500K and belongs to neutral white light. By irradiating the Figure 6A camera module 10 shown in the Figure 7A embodiment and the

[0274] camera module 10 of the Figures 9A to 9C illustrated prior art with the D65 light source respectively. Figures 9A to 9C Among them, in Figures 9A to 9C , R / G represents the ratio of the transmittance of red light to the transmittance of green light, B / G represents the ratio of the transmittance of blue light to the transmittance of green light, Shading represents the color shadow, and Figure 6A the abscissa in Figure 7A is the field of view, specifically the fields of view of 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F.

[0275] Please refer to Table 2b, which is Figures 9A to 9C the weighted value that can be obtained by weighting the corresponding values of R / G, B / G, and shading in multiple fields of view. As can be seen from Figures 9A to 9C , and Table 2b, Figure 6A Compared with the Figure 7A prior art, the decrease in the ratio of the transmittance of red light to green light of lens 1 for different fields of view is significantly smaller, which can reduce the impact on RI. In addition, Figure 6A compared with the Figure 7A prior art, the Shading drop value of lens 1 for different fields of view is significantly smaller, which can reduce the influence of color deviation.

[0276] Table 2b

[0277]

[0278]

[0279] Through the comparison between the two scenarios of without light source and with light source, Figure 6A compared with the Figure 7A prior art, at different fields of view, the ratio of the transmittance of blue light to the transmittance of green light of lens 1 is basically the same, but the decrease in the ratio of the transmittance of red light to the transmittance of green light of lens 1 is significantly smaller, and the Shading drop value is also significantly smaller. Therefore, in the Figure 6A embodiment of the camera module 10 of the present application, after removing the filter, by doping color masterbatch in the plastic lens and cooperating with setting infrared filter films on both side surfaces of the plastic lens, not only the back focal distance of lens 1 is reduced, so as to reduce the overall thickness of the camera module 10, but also better imaging effects are achieved. For example, the ratio of the transmittance of red light to the transmittance of green light of lens 1 at different fields of view is improved, thereby reducing the impact on RI. For another example, the drop value of colorshading at different fields of view is improved, thereby reducing the influence of color deviation.

[0280] Please refer to Figure 10 , Figure 10 which is Figure 4A a schematic structural diagram of lens 1 and photosensitive element 2 in the camera module 10 shown in some embodiments.

[0281] In some embodiments, the camera module 10 includes a lens 1 and an image sensor 2 arranged from the object side to the image side. The lens 1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged from the object side to the image side. Among them, the first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, the third lens L3 is a plastic lens 112, and the third lens L3 is doped with color masterbatch, and infrared filter films 12 are provided on both the object side surface and the image side surface of the third lens L3, and the fourth lens L4 is a plastic lens 112.

[0282] Please refer to Table 3a and Table 3b. Among them, Table 3a is Figure 10 the radius of curvature (R), interval (D), refractive index (Nd), and Abbe number of each lens 11 of the shown camera module 10 in a possible embodiment. Among them, the interval includes the thickness of the structure itself and the spacing between structures. Table 3b is Figure 10 the aspheric coefficients of each lens 11 of the shown camera module 10 in a possible embodiment.

[0283] Table 3a

[0284] Surface number Description Radius of curvature / mm Interval / mm Refractive index Abbe number 1 Object surface 400 2 L1 0.623 0.345 1.50 82.5 3 2.417 0.057 4 L2 -3.074 0.12 1.67 19.2 5 -5.337 0.158 6 L3 -1.14 0.244 1.545 55.9 7 -0.876 0.427 8 L4 -3.011 0.399 1.54 55.9 9 1.436 0.406 10 Imaging surface Infinity 0

[0285] Table 3b

[0286] Surface number k A4 A6 A8 A10 A12 A14 A16 2 0.217 -5.170 33.045 1386.866 -36334.987 409020.158 -2589505.323 3 0.536 -46.121 1464.734 -26854.805 301304.285 -2107915.848 8951536.190 4 0.259 5.098 -43.972 975.721 -18675.261 208005.232 -1408915.947 5 1.752 -78.228 4096.561 -116483.325 2101230.297 -24951706.404 195274354.146 6 1.143 -68.049 1774.708 -29215.240 316171.750 -2280487.346 11004520.810 7 -0.086 -5.429 124.139 -1328.711 8575.497 -33573.054 80581.514 8 -1.628 3.447 -4.235 -16.331 96.952 -207.872 238.304 9 -1.435 3.466 -8.010 13.907 -17.682 15.887 -9.651

[0287] Each lens 11 in Table 3a is an aspheric surface and can be defined by, but not limited to, the following aspheric curve equation:

[0288]

[0289] Among them, z is the point on the aspheric surface at a distance r from the optical axis, which is the relative distance from the tangent plane of the intersection point on the optical axis of the aspheric surface; r is the perpendicular distance from the point on the aspheric curve to the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the aspheric coefficient of the i-th order, and reference can be made to Table 3b.

[0290] Please refer to Table 3c. Table 3c is Figure 10 the basic parameters and simulation result parameters of the shown camera module 10 in a possible embodiment. Among them, in Table 3c, EFL is the focal length of the lens 1, TTL is the total optical length of the lens 1, F number is the aperture value of the lens 1, FBL is the back focal length of the lens 1, RI is the relative illumination of the lens 1 imaging, Distortion is the distortion of the lens 1 imaging, and CRA is the chief ray angle.

[0291] Table 3c

[0292] Parameters EFL / mm TTL / mm F number FOV FBL / mm RI Distortion CRA Value 2.14 2.175 2.2 86° 0.29 >0.2 <2％ <41°

[0293] In this embodiment, the ratio of the focal length EFL of lens 1 to the total optical length TTL of lens 1 is EFL / TTL = 0.98; the ratio of the back focal length FBL of lens 1 to the total optical length TTL of lens 1 is FBL / TTL = 0.13. According to the simulation results, the RI value of lens 1 is greater than 0.2, and the distortion is less than 2%, which can ensure that there is no obvious color cast and deformation in the imaging picture.

[0294] Please refer to Figure 11 , Figure 11 is Figure 4A a schematic structural diagram of lens 1 and photosensitive element 2 in camera module 10 shown in some other embodiments.

[0295] In some embodiments, camera module 10 includes lens 1 and photosensitive element 2 arranged from the object side to the image side. Lens 1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged from the object side to the image side. Among them, the first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, the third lens L3 is a plastic lens 112, and the third lens L3 is doped with color masterbatch, and infrared filter films 12 are provided on both the object side surface and the image side surface of the third lens L3, and the fourth lens L4 is a plastic lens 112.

[0296] Please refer to Table 4a and Table 4b, where Table 4a is Figure 11 the radius of curvature (R), spacing (D), refractive index (Nd), and Abbe number of each lens 11 in camera module 10 shown in a possible embodiment. Among them, the spacing includes the thickness of the structure itself and the spacing between structures. Table 4b is Figure 11 the aspheric coefficient of each lens 11 in camera module 10 shown in a possible embodiment.

[0297] Table 4a

[0298] Surface number Description Radius of curvature / mm Interval / mm Refractive index Abbe number 1 Object surface 400 2 L1 0.633 0.29 1.497 81.5 3 1.257 0.03 4 L2 2.753 0.141 1.67 19.2 5 4.032 0.348 6 L3 -1.398 0.233 1.545 55.9 7 -0.919 0.471 8 L4 -1.267 0.373 1.545 55.9 9 3.310 0.291 10 Imaging surface Infinity[[ 0

[0299] Table 4b

[0300] ​ k A4 A6 A8 A10 A12 A14 A16 2 -0.472 3.115 -16.704 -3.151 0 0 0 3 -0.731 -13.988 68.153 -50.118 0 0 0 4 -0.483 4.862 41.453 25.871 0 0 0 5 0.442 4.229 -20.823 495.836 -983.228 -1.419E+04 -6.354E+04 6 0.767 -33.807 382.367 -2486.807 9504.655 -1.966E+04 1.671 7 -0.225 0.310 -11.517 84.508 -161.607 62.637 50.74 8 -0.969 1.526 -0.281 -0.554 0.447 -0.207 0.058 9 -0.706 0.688 -0.405 0.123 -0.034 6.245E-03 7.493E-04

[0301] Each lens 11 in Table 4a is an aspheric surface, and can be defined by, but not limited to, the following aspheric curve equation:

[0302]

[0303] where z is the relative distance of a point on the aspheric surface at a distance r from the optical axis to the tangent plane of the intersection point of the aspheric surface and the optical axis; r is the perpendicular distance of a point on the aspheric curve from the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the aspheric coefficient of the i-th order, and reference can be made to Table 4b.

[0304] Please refer to Table 4c, which is ​ the basic parameters and simulation result parameters of the camera module 10 shown in a possible embodiment. Among them, in Table 4c, EFL is the focal length of lens 1, TTL is the total optical length of lens 1, F-number is the aperture value of lens 1, FBL is the back focal length of lens 1, RI is the relative illumination of the image formed by lens 1, Distortion is the distortion of the image formed by lens 1, and CRA is the chief ray angle.

[0305] Table 4c

[0306] ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2.14 2.175 2.2 86° 0.23 >0.2 <2％ <39°

[0307] In this embodiment, the ratio EFL / TTL of the focal length EFL of lens 1 to the total optical length TTL of lens 1 is 0.98; the ratio FBL / TTL of the back focal length FBL of lens 1 to the total optical length TTL of lens 1 is 0.11. According to the simulation results, the RI value of lens 1 is greater than 0.2, and the distortion is less than 2%, which can ensure that there is no obvious color cast and deformation in the imaging picture.

[0308] Please refer to ​ , ​ which is ​ the schematic structural diagram of lens 1 and photosensitive element 2 in the camera module 10 shown in some other embodiments.

[0309] In some embodiments, the camera module 10 includes a lens 1 and a photosensitive element 2 arranged from the object side to the image side. Lens 1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged from the object side to the image side. Among them, the first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, the third lens L3 is a plastic lens 112, and the third lens L3 is doped with color masterbatch, and an infrared filter film 12 is provided on both the object side surface and the image side surface of the third lens L3, and the fourth lens L4 is a plastic lens 112.

[0310] Please refer to Table 5a and Table 5b together. Among them, Table 5a is ​ the radius of curvature (R), interval (D), refractive index (Nd), and Abbe number of each lens 11 in the camera module 10 shown in a possible embodiment. The interval includes the thickness of the structure itself and the distance between structures. Table 5b is ​ the aspheric coefficients of each lens 11 in the camera module 10 shown in a possible embodiment.

[0311] Table 5a

[0312]

[0313] Table 5b

[0314]

[0315]

[0316] Each lens 11 in Table 5a is an aspherical surface, and can be defined by, but not limited to, the following aspherical curve equation:

[0317]

[0318] Where z is the relative distance of a point on the aspherical surface at a distance r from the optical axis to the tangent plane at the intersection of the aspherical surface and the optical axis; r is the perpendicular distance of a point on the aspherical curve from the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the aspherical coefficient of the i-th order, and reference can be made to Table 5b.

[0319] Please refer to Table 5c, which is ​ The basic parameters and simulation result parameters of the shown camera module 10 in a possible embodiment. Among them, in Table 5c, EFL is the focal length of lens 1, TTL is the total optical length of lens 1, F number is the aperture value of lens 1, FBL is the back focal length of lens 1, RI is the relative illuminance of the image formed by lens 1, Distortion is the distortion of the image formed by lens 1, and CRA is the chief ray angle.

[0320] Table 5c

[0321] ​ ​ ​ F-number FOV FBL / mm RI Distortion CRA Value 1.41 1.65 2.2 86° 0.314 >0.2 <2％ <41°

[0322] In this embodiment, the ratio of the focal length EFL of lens 1 to the total optical length TTL of lens 1 is EFL / TTL = 0.85; the ratio of the back focal length FBL of lens 1 to the total optical length TTL of lens 1 is FBL / TTL = 0.19. According to the simulation results, the RI value of lens 1 is greater than 0.2, and the distortion is less than 2%, which can ensure that there is no obvious color cast and deformation in the imaging picture.

[0323] Please refer to in combination with Figure 13A and Figure 13B , Figure 13A is Figure 1A The schematic structural diagram of the camera module 10 in some other embodiments in the shown electronic device 100; Figure 13B is Figure 1A The schematic structural diagram of the camera module 10 in some other embodiments in the shown electronic device 100. It should be noted that Figure 13A and Figure 13B The camera module 10 in the shown embodiments may include Figure 2A , Figure 4A , Figure 4B , Figure 5A and Figure 5B For some of the technical features of the camera module 10 in the illustrated embodiment, the differences between the two will be mainly described below, and the same parts of the two will not be elaborated further.

[0324] In some embodiments, the multiple lenses 11 may include a glass lens 111 made of blue glass material. The glass lens 111 made of blue glass material is used to filter light in the first wavelength range.

[0325] In this embodiment, by combining the glass lens 111 made of blue glass material with at least two infrared filter films 12, light in the union of the first wavelength range and the second wavelength range can be filtered, thereby realizing the infrared filtering function of the lens 1, reducing or avoiding image noise in low-light conditions, improving the restoration degree of imaging details, and making the captured image more in line with the human eye's perception. Since the infrared filtering function can be achieved through the lens 1, there is no need to set a traditional filter between the lens 1 and the photosensitive element 2, which can improve the degree of freedom of the back focus design of the lens 1, thereby compressing the back focus space of the lens 1, reducing the overall optical length TTL, and further reducing the overall thickness of the camera module 10 to achieve a thin and light design of the camera module 10, which is beneficial for applying the camera module 10 to the electronic device 100 to achieve a thin and light design of the electronic device 100.

[0326] For example, the glass lens 111 made of blue glass material realizes the filtering of light with wavelengths from 680 nm to 750 nm, and all the infrared filter films 12 together realize the filtering of light with wavelengths from 750 nm to 1150 nm, thereby realizing the filtering of light with wavelengths from 680 nm to 1150 nm by the lens 1.

[0327] Among them, the blue glass material can be BK7 blue glass, with a refractive index of 1.5168 and an Abbe number of 64.17.

[0328] In some examples (please refer to Figure 13A ), the glass lens 111 made of blue glass material can be the first lens 11 on the object side close to the lens 1.

[0329] In this embodiment, since the first lens 11 on the object side close to the lens 1 can adopt a spherical shape, the glass lens 111 made of blue glass material can be prepared by a grinding process, thereby reducing the preparation process difficulty of the glass lens 111 made of blue glass material.

[0330] In other examples (please refer to Figure 13B ), the glass lens 111 made of blue glass material can be the second lens 11 on the object side close to the lens 1.

[0331] In this embodiment, the first lens 11 near the object side of the lens 1 can be made of a glass lens 111, and the second lens 11 can be made of a glass lens 111 of blue glass material. The structure of using two glass lenses 111 is beneficial to compressing the thickness of the lens 1, thereby facilitating the realization of the thin and light design of the lens 1.

[0332] Among them, the glass lens 111 made of blue glass material can also be prepared by a low-temperature molding process. Through the molding process, the blue glass material is molded into the first lens 11 or the second lens 11 near the object side of the lens 1. The low-temperature molding process can avoid the volatilization of ionic components in the blue glass material due to high temperature, thereby reducing the infrared cut-off effect.

[0333] In some other embodiments, the lens 1 in the camera module 10 can also be combined with a coating on the light-transmitting cover plate to achieve an infrared filtering function, so as to cancel the filter in the camera module 10, reduce the back focal length of the lens 1, and further reduce the overall thickness of the camera module 10 to achieve a thin and light design. Next, the implementation of the lens 1 combining the coating on the light-transmitting cover plate to achieve the infrared filtering function in the embodiments of the present application will be introduced.

[0334] Please refer to Figure 14A and Figure 14B , Figure 14A is Figure 1A a partial schematic structural view of the electronic device 100 shown in some embodiments cut along A-A; Figure 14B is Figure 1A a partial schematic structural view of the electronic device 100 shown in some other embodiments cut along A-A. It should be noted that Figure 14A and Figure 14B the camera modules 10 shown in the embodiments may include Figure 2A , Figure 4A , Figure 4B , Figure 5A , Figure 5B , Figure 13A and Figure 13B partial technical features of the camera modules 10 shown in the embodiments. The following mainly describes the differences between the two, and the same parts of the two will not be repeated.

[0335] In some embodiments, the number of infrared filtering films 12 is at least three. One of the infrared filtering films 12 is disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 and corresponds to the light-transmitting area 203 of the screen 20.

[0336] In this embodiment, the infrared filter film 12 disposed on the light-transmitting cover plate 201 and the infrared filter films 12 disposed on both side surfaces of at least one lens 11 in the lens 1 jointly achieve the filtering of light in the second wavelength range, and the plastic lens 112 doped with color masterbatch material in the lens 1 or the glass lens 111 made of blue glass material in the lens 1 achieves the filtering of light in the first wavelength range, thereby realizing that the infrared filter film 12 disposed on the light-transmitting cover plate 201 cooperates with the lens 1 to jointly achieve the infrared filtering function.

[0337] In addition, in this embodiment, since the infrared filter film 12 disposed on the light-transmitting cover plate 201 can achieve the filtering of some light in the second wavelength range, the total thickness of the infrared filter film 12 disposed in the lens 1 can be reduced, thereby reducing the thickness of a single infrared filter film 12, and further reducing the surface pulling force received by the lens 1 with infrared filter films 12 disposed on both side surfaces, which is beneficial to reducing the risk of surface shape variation of the lens 1 with infrared filter films 12 disposed on both side surfaces.

[0338] For example, the plastic lens 112 doped with color masterbatch material in the lens 1 or the glass lens 111 made of blue glass material in the lens 1 achieves the filtering of light with wavelengths from 680 nm to 750 nm, the infrared filter film 12 disposed on the light-transmitting cover plate 201 achieves the filtering of light with wavelengths from 750 nm to 950 nm, and the infrared filter films 12 disposed on both side surfaces of at least one lens 11 in the lens 1 jointly achieve the filtering of light with wavelengths from 850 nm to 1150 nm, so that the infrared filter film 12 disposed on the light-transmitting cover plate 201 cooperates with the lens 1 to jointly achieve the filtering of light with wavelengths from 680 nm to 1150 nm.

[0339] Among them, the infrared filter film 12 disposed on the light-transmitting cover plate 201 may adopt the same structure as the infrared filter films 12 disposed on both side surfaces of the lens 11 in the foregoing embodiment.

[0340] Please refer to Figure 15A and Figure 15B , Figure 15A which Figure 1A is a partial structural schematic diagram of the electronic device 100 shown in a cross-section along A-A in some other embodiments; Figure 15B which Figure 1A is a partial structural schematic diagram of the electronic device 100 shown in a cross-section along A-A in some other embodiments. It should be noted that Figure 15A and Figure 15B the camera module 10 shown in the embodiments may include Figure 14A and Figure 14B partial technical features of the camera module 10 shown in the embodiments. The following mainly describes the differences between the two, and the same parts of the two will not be described again.

[0341] In some embodiments (please refer to Figure 15A ), the lens 1 may include a plastic lens 112 doped with a color masterbatch and is used to filter light in the first wavelength range. The electronic device 100 may include an infrared filter film 12, and the infrared filter film 12 is disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 and is disposed corresponding to the light-transmitting area 203 of the screen 20. The infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 is used to filter light in the second wavelength range.

[0342] In this embodiment, the infrared filtering function is jointly realized by the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 and the plastic lens 112 doped with a color masterbatch in the lens 1, so that a filter is not required to be provided in the camera module 10, which is beneficial to compressing the back focal length of the lens 1, and further reducing the thickness of the camera module 10, which is beneficial to the thin and light design.

[0343] For example, the plastic lens 112 doped with a color masterbatch material in the lens 1 realizes the filtering of light with wavelengths from 680 nm to 750 nm, and the infrared filter film 12 disposed on the light-transmitting cover plate 201 realizes the filtering of light with wavelengths from 750 nm to 1150 nm, so that the infrared filter film 12 disposed on the light-transmitting cover plate 201 and the lens 1 jointly realize the filtering of light with wavelengths from 680 nm to 1150 nm.

[0344] In other embodiments (please refer to Figure 15B ), the lens 1 may further include at least one glass lens 111, and the first lens 11 on the object side of the lens 1 is a glass lens 111, and an infrared filter film 12 is disposed on one side surface of the glass lens 111. The infrared filter film 12 disposed on the surface of the glass lens 111 and the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 are jointly used to filter light in the second wavelength range.

[0345] In this embodiment, due to the high hardness of the glass material, when the infrared filter film 12 is disposed on one side surface of the glass lens 111, the surface shape variation of the glass lens 111 is small or even without deformation. The infrared filtering function is jointly realized by the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1, the plastic lens 112 doped with a color masterbatch in the lens 1, and the infrared filter film 12 disposed on the surface of the glass lens 111, so that a filter is not required to be provided in the camera module 10, which is beneficial to compressing the back focal length of the lens 1, and further reducing the thickness of the camera module 10, which is beneficial to the thin and light design.

[0346] For example, in lens 1, the plastic lens 112 doped with color masterbatch material filters light with wavelengths from 680 nm to 750 nm, the infrared filter film 12 disposed on the light-transmitting cover plate 201 filters light with wavelengths from 750 nm to 950 nm, and the infrared filter film 12 disposed on the surface of the glass lens 111 in lens 1 filters light with wavelengths from 850 nm to 1150 nm. Thus, the infrared filter film 12 disposed on the light-transmitting cover plate 201 and lens 1 together achieve the filtering of light with wavelengths from 680 nm to 1150 nm.

[0347] Please refer to Figure 16A and Figure 16B , Figure 16A is Figure 1A a partial schematic structural view of the electronic device 100 shown in a cross-section along A-A in still other embodiments; Figure 16B is Figure 1A a partial schematic structural view of the electronic device 100 shown in a cross-section along A-A in still other embodiments. It should be noted that Figure 16A and Figure 16B the camera module 10 in the embodiments shown may include Figure 15A and Figure 15B some technical features of the camera module 10 in the embodiments shown. The following mainly describes the differences between the two, and the same parts of the two will not be described again.

[0348] In some embodiments, lens 1 may include a glass lens 111 made of blue glass material for filtering light in a first wavelength range.

[0349] In some examples (please refer to Figure 16A ), the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing lens 1 is used to filter light in a second wavelength range.

[0350] In this embodiment, the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing lens 1 and the glass lens 111 made of blue glass material in lens 1 together achieve the infrared filtering function, so that there is no need to provide a filter in the camera module 10, which is beneficial to compressing the back focal length of lens 1, and further reducing the thickness of the camera module 10, which is beneficial to the thin and light design.

[0351] For example, in lens 1, the glass lens 111 made of blue glass material filters light with wavelengths from 680 nm to 750 nm, and the infrared filter film 12 disposed on the light-transmitting cover plate 201 filters light with wavelengths from 750 nm to 1150 nm. Thus, the infrared filter film 12 disposed on the light-transmitting cover plate 201 and lens 1 together achieve the filtering of light with wavelengths from 680 nm to 1150 nm.

[0352] In other examples (please refer to Figure 16B ) The infrared filter film 12 disposed on the surface of the glass lens 111 and the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1 are jointly used to filter light in the second wavelength range.

[0353] In this embodiment, the infrared filter function is jointly achieved by the infrared filter film 12 disposed on the surface of the light-transmitting cover plate 201 facing the lens 1, the glass lens 111 made of blue glass material in the lens 1, and the infrared filter film 12 disposed on the surface of the glass lens 111. Thus, there is no need to provide a filter in the camera module 10, which is beneficial to compressing the back focal length of the lens 1, and further reducing the thickness of the camera module 10, which is beneficial to the thin and light design.

[0354] For example, the glass lens 111 made of blue glass material in the lens 1 filters light with wavelengths from 680 nm to 750 nm, the infrared filter film 12 disposed on the light-transmitting cover plate 201 filters light with wavelengths from 750 nm to 950 nm, and the infrared filter film 12 disposed on the surface of the glass lens 111 in the lens 1 filters light with wavelengths from 850 nm to 1150 nm. Thus, the infrared filter film 12 disposed on the light-transmitting cover plate 201 and the lens 1 jointly filter light with wavelengths from 680 nm to 1150 nm.

[0355] Among them, the glass lens 111 with an infrared filter film 12 disposed on its surface and the glass lens 111 made of blue glass material in the lens 1 can be the same lens 11, or different lenses 11.

[0356] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present application. That is to say, the above-described multiple embodiments can also be arbitrarily combined according to actual needs.

[0357] It should be noted that all the above drawings are exemplary illustrations of the present application and do not represent the actual size of the product. And the dimensional proportional relationship between components in the drawings is not used as a limitation to the actual product of the present application either.

[0358] The above are only some embodiments and implementation manners of the present application. The protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.< / fbl> < / fbl>

Claims

1. A camera module (10), characterized in that, It includes a lens (1) and an image sensor (2). The lens (1) is used to filter light within the wavelength range of 700 nm to 1000 nm, and the image sensor (2) is located on the image side of the lens (1). The lens (1) includes multiple lens elements (11) and at least two infrared filter films (12). The multiple lens elements (11) are arranged in the direction from the object side of the lens (1) to the image side of the lens (1). One of the multiple lens elements (11) is used to filter light in a first wavelength range. Infrared filter films (12) are respectively provided on both surfaces of at least one of the multiple lens elements (11). All the infrared filter films (12) together are used to filter light in a second wavelength range. The union of the first wavelength range and the second wavelength range is 700 nm to 1000 nm.

2. The camera module (10) according to claim 1, wherein, The minimum value in the first wavelength range is less than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is less than the maximum value in the second wavelength range.

3. The camera module (10) according to any one of claims 1 to 2, characterized in that, A single infrared filter film (12) includes multiple layers of first films (121) and multiple layers of second films (122). The multiple layers of first films (121) and the multiple layers of second films (122) are arranged alternately one by one. Among them, the refractive index of each layer of the first film (121) is greater than or equal to 2, and the refractive index of each layer of the second film (122) is less than 2.

4. The camera module (10) according to claim 3, characterized in that, The thickness d1 of each layer of the first film (121) satisfies: 1 nm ≤ d1 ≤ 130 nm, and the thickness d2 of each layer of the second film (122) satisfies: 1 nm ≤ d2 ≤ 130 nm.

5. The camera module (10) according to claim 4, wherein Among the multiple layers of first films (121), some of the first films (121) have a first thickness, and some of the first films (121) have a second thickness. The first films (121) with the first thickness and the first films (121) with the second thickness are arranged alternately. Among the multiple layers of second films (122), some of the second films (122) have a first thickness, and some of the second films (122) have a second thickness. The second films (122) with the first thickness and the second films (122) with the second thickness are arranged alternately. Among them, the first thickness d3 satisfies: 1 nm ≤ d3 < 66 nm, and the second thickness d4 satisfies: 66 nm ≤ d4 ≤ 130 nm.

6. The camera module (10) according to any one of claims 1 to 5, characterized in that, The thickness of a single infrared filter film (12) is less than or equal to 6 μm.

7. The camera module (10) according to any one of claims 1 to 6, characterized in that, The thickness of each part of a single infrared filter film (12) is the same. Among the two infrared filter films (12) provided on both surfaces of the same lens element (11), the ratio of the thickness of one infrared filter film (12) to the thickness of the other infrared filter film (12) is within the range of 1 to 1.

2.

8. The camera module (10) according to any one of claims 1 to 7, characterized in that, There is a wavelength range intersection in the wavelength ranges of at least two infrared filter films (12) for filtering light. The ratio of the extreme difference of the wavelength range intersection to the extreme difference of the wavelength range of the lens (1) for filtering light is greater than or equal to 50%.

9. The camera module (10) according to any one of claims 1 to 8, characterized in that The number of the lenses (11) is at least 4, and the infrared filter film (12) is disposed on both surfaces of the first lens (11) adjacent to the image side of the lens (1); Alternatively, the infrared filter film (12) is disposed on both surfaces of the second lens (11) adjacent to the image side of the lens (1); Alternatively, the infrared filter film (12) is disposed on both surfaces of the third lens (11) adjacent to the image side of the lens (1).

10. The camera module (10) according to any one of claims 1 to 9, characterized in that, The multiple lenses (11) include at least one plastic lens (112), and the infrared filter film (12) is disposed on both surfaces of at least one plastic lens (112). The plastic lens (112) provided with the infrared filter film (12) is located on the image side of the first lens (11) adjacent to the object side of the lens (1).

11. The camera module (10) according to claim 10, characterized in that, The multiple lenses (11) include a plastic lens (112) doped with color masterbatch. The plastic lens (112) doped with color masterbatch is used to filter the light in the first wavelength range. The plastic lens (112) doped with color masterbatch is located on the image side of the first lens (11) adjacent to the object side of the lens (1).

12. The camera module (10) according to claim 11, wherein, The ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens (112) doped with color masterbatch is in the range of 1 to 1.

15.

13. The camera module (10) according to claim 11 or 12, characterized in that, The number of the lenses (11) is at least 4, and the plastic lens (112) doped with color masterbatch is the second lens (11) or the third lens (11) adjacent to the object side of the lens (1).

14. The camera module (10) according to any one of claims 11-13, characterized in that, The plastic lens (112) doped with color masterbatch and the plastic lens (112) with the infrared filter film (12) disposed on both surfaces are the same plastic lens (112), or are different plastic lenses (112).

15. The camera module (10) according to any one of claims 11 to 14, characterized in that, The multiple lenses (11) include one glass lens (111) and three plastic lenses (112). Along the direction from the object side of the lens (1) to the image side of the lens (1), one glass lens (111) and three plastic lenses (112) are arranged in sequence; Alternatively, the multiple lenses (11) include four plastic lenses (112).

16. The camera module (10) according to claim 10, characterized in that, The multiple lenses (11) include one glass lens (111) made of blue glass material. The glass lens (111) made of blue glass material is used to filter the light in the first wavelength range. The glass lens (111) made of blue glass material is the first lens (11) or the second lens (11) adjacent to the object side of the lens (1).

17. The camera module (10) according to any one of claims 1 to 16, characterized in that, The first lens (11) adjacent to the object side of the lens (1) is a glass lens (111), and the total optical length TTL of the lens (1) satisfies: TTL < 2.25 mm.

18. The camera module (10) according to claim 17, characterized in that, The total optical length TTL of the lens (1) and the focal length EFL of the lens (1) satisfy: EFL / TTL > 0.

8.

19. The camera module (10) according to claim 17 or 18, characterized in that, The back focal length FBL of the lens (1) satisfies: FBL < 0.5 mm.

20. The camera module (10) according to claim 19, characterized in that, The back focal length FBL of the lens (1) and the overall optical length TTL of the lens (1) satisfy: 0.1 <fbl ttl> 0.3。< / fbl> 21. The camera module (10) according to any one of claims 17 to 20, characterized in that, The field of view FOV of the lens (1) satisfies: 80° < FOV < 110°.

22. The camera module (10) according to any one of claims 17 to 21, characterized in that, The Abbe number of at least two of the multiple lenses (11) is greater than 55.

23. An electronic device (100), characterized in that, Comprising an image processor (60) and a camera module (10) according to any one of claims 1 to 22, the image processor (60) is communicatively connected to the camera module (10), and the image processor (60) is configured to obtain image data from the camera module (10) and process the image data.

24. The electronic device (100) according to claim 23, characterized in that, The electronic device (100) further comprises a screen (20) and a back cover (30); The screen (20) is mounted on the back cover (30), enclosing an internal space (40); The camera module (10) is mounted in the internal space (40), and the screen (20) is located on the object side of the lens (1) of the camera module (10); Wherein, the screen (20) comprises a light-transmitting cover plate (201) and a display screen (202), the light-transmitting cover plate (201) and the display screen (202) are stacked, the light-transmitting cover plate (201) is located on the side of the display screen (202) away from the lens (1), and the screen (20) is provided with a light-transmitting area (203) corresponding to the lens (1); The number of the infrared filter films (12) is at least three, and one of the infrared filter films (12) is disposed on the surface of the light-transmitting cover plate (201) facing the lens (1) and corresponds to the light-transmitting area (203).

25. An electronic device (100), characterized in that, Comprising a screen (20), a back cover (30), a camera module (10) and an infrared filter film (12); The screen (20) is mounted on the back cover (30), enclosing an internal space (40); The camera module (10) is mounted in the internal space (40), the camera module (10) comprises a lens (1) and a photosensitive element (2), the photosensitive element (2) is located on the image side of the lens (1), and the screen (20) is located on the object side of the lens (1); Wherein, the lens (1) comprises multiple lenses (11), the multiple lenses (11) are arranged along the direction from the object side of the lens (1) to the image side of the lens (1), and one of the multiple lenses (11) is configured to filter light in a first wavelength range; The screen (20) comprises a light-transmitting cover plate (201) and a display screen (202), the light-transmitting cover plate (201) and the display screen (202) are stacked, the light-transmitting cover plate (201) is located on the side of the display screen (202) away from the lens (1), the screen (20) is provided with a light-transmitting area (203) corresponding to the lens (1), the infrared filter film (12) is disposed on the surface of the light-transmitting cover plate (201) facing the lens (1), and the infrared filter film (12) corresponds to the light-transmitting area (203), the infrared filter film (12) is configured to filter light in a second wavelength range, and the union of the first wavelength range and the second wavelength range is 700 nm to 1000 nm.

26. An electronic device (100), characterized in that, It includes a camera module (10), a screen (20), a back shell (30), and at least two infrared filter films (12); The screen (20) is installed on the back shell (30) to enclose an internal space (40); The camera module (10) is installed in the internal space (40). The camera module (10) includes a lens (1) and a photosensitive element (2). The photosensitive element (2) is located on the image side of the lens (1), and the screen (20) is located on the object side of the lens (1); Wherein, the lens (1) includes multiple lens elements (11). The multiple lens elements (11) are arranged in the direction from the object side of the lens (1) to the image side of the lens (1). One of the multiple lens elements (11) is used to filter light in a first wavelength range. The multiple lens elements (11) include at least one glass lens element (111), and the infrared filter film (12) is disposed on one side surface of at least one of the glass lens elements (111); The screen (20) includes a light-transmitting cover plate (201) and a display screen (202). The light-transmitting cover plate (201) and the display screen (202) are stacked. The light-transmitting cover plate (201) is located on the side of the display screen (202) away from the lens (1). The screen (20) is provided with a light-transmitting area (203) corresponding to the lens (1). One of the at least two infrared filter films (12) is disposed on the surface of the light-transmitting cover plate (201) facing the lens (1) and corresponding to the light-transmitting area (203). All the infrared filter films (12) are used to filter light in a second wavelength range. The union of the first wavelength range and the second wavelength range is 700nm to 1000nm.

27. The camera module (10) according to claim 25 or 26, characterized in that, The minimum value in the first wavelength range is less than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is less than the maximum value in the second wavelength range.

28. The electronic device (100) according to any one of claims 25 to 27, characterized in that, A single infrared filter film (12) includes multiple layers of first films (121) and multiple layers of second films (122). The multiple layers of first films (121) and the multiple layers of second films (122) are alternately arranged one by one. Wherein, the refractive index of each layer of the first film (121) is greater than or equal to 2, and the refractive index of each layer of the second film (122) is less than 2.

29. The electronic device (100) according to claim 28, characterized in that, The thickness d1 of each layer of the first film (121) satisfies: 1nm ≤ d1 ≤ 130nm, and the thickness d2 of each layer of the second film (122) satisfies: 1nm ≤ d2 ≤ 130nm.

30. The electronic device (100) according to claim 29, wherein, Some of the multiple layers of first films (121) have a first thickness, and the other part of the first films (121) has a second thickness. The first films (121) with the first thickness and the first films (121) with the second thickness are alternately arranged; Some of the second films (122) in the multiple second films (122) have a first thickness, and the other part of the second films (122) has a second thickness. The second films (122) with the first thickness and the second films (122) with the second thickness are arranged alternately; Among them, the first thickness d3 satisfies: 1nm ≤ d3 < 66nm, and the second thickness d4 satisfies: 66nm ≤ d4 ≤ 130nm.

31. The electronic device (100) according to any one of claims 25 to 30, characterized in that, The thickness of a single infrared filter film (12) is less than or equal to 6μm.

32. The electronic device (100) according to any one of claims 25 to 31, characterized in that, The multiple lenses (11) include a plastic lens (112) doped with a color masterbatch. The plastic lens (112) doped with the color masterbatch is used to filter the light in the first wavelength range. The plastic lens (112) doped with the color masterbatch is located on the image side of the first lens (11) near the object side of the lens (1); Alternatively, the multiple lenses (11) include a glass lens (111) made of blue glass material. The glass lens (111) made of blue glass material is used to filter the light in the first wavelength range. The glass lens (111) made of blue glass material is the first lens (11) or the second lens (11) near the object side of the lens 1.

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