Camera module and electronic device

Abstract

The present application provides a camera module and an electronic device. The camera module comprises a lens unit and a photosensitive element; the lens unit 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 unit; the lens unit comprises a plurality of lenses and at least two infrared filter membranes; the plurality of lenses are arranged in a direction from the object side of the lens unit to the image side of the lens unit; one lens among the plurality of lenses is used for filtering light in a first wavelength range; two side surfaces of at least one lens among the plurality of lenses are respectively provided with the infrared filter membranes; all the infrared filter membranes are jointly used for filtering light in a second wavelength range; and the combination of the first wavelength range and the second wavelength range is 700 nm to 1000 nm. The camera module provided by the present application omits an optical filter structure; by means of the design of the lenses and the infrared filter membranes, the filtering function is achieved by the lens unit, reducing the thickness of the entire camera module, achieving a lightweight design.

Description

Camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 24, 2024, with application number 202410104657.6, and priority to the Chinese patent application with the invention name “Camera module and electronic equipment”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of photographing equipment, and in particular to a camera module and electronic equipment. Background Art

[0003] With the development demand for thinner and lighter electronic devices, camera modules also need to be designed to be thinner. 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 transmission path of the light so that the light can pass through the filter and be incident on the photosensitive element. The photosensitive element is used to convert the light signal of the received light into image data, which is then processed by the image processor in the electronic device and imaged on the screen. Among them, the filter is used to filter the light passing through the lens to achieve better imaging effects. Among them, the lens, filter and photosensitive element are all components that affect the thickness of the camera module, but since these components are necessary and difficult to omit, the thinning design of the camera is more difficult. Summary of the Invention

[0004] The present application provides a camera module, including a lens and a photosensitive element. The lens includes multiple lenses and at least two infrared filter membranes. Through the design of the lenses and infrared filter membranes, filtering of light with a wavelength of 700nm to 1000nm is achieved, so as to eliminate the filter in the existing camera module, thereby reducing the back focal length of the lens, and then reducing the thickness of the entire camera module to achieve a lightweight design.

[0005] In a first aspect, the present application provides a camera module comprising a lens and a photosensitive element, wherein the lens is configured to filter light within a wavelength range of 700 nm to 1000 nm, and the photosensitive element is located on the image side of the lens. The lens comprises multiple lens elements and at least two infrared filters, wherein the multiple lens elements are arranged in a direction from the object side of the lens to the image side of the lens, wherein one lens element of the multiple lens elements is configured to filter light within a first wavelength range, and infrared filters are provided on both side surfaces of at least one lens element of the multiple lens elements, wherein all infrared filters are collectively configured to filter light within a second wavelength range, wherein the combination of the first wavelength range and the second wavelength range is 700 nm to 1000 nm.

[0006] In the present application, the camera module can filter light within the range of 700nm to 1000nm through the lens to achieve an infrared filtering function, which can eliminate infrared interference, reduce or avoid image noise in insufficient light, improve the restoration of imaging details, and make the resulting image more consistent with the perception of the human eye. Since the infrared filtering function can be achieved through the lens, there is no need to set a traditional filter between the lens and the photosensitive element. The freedom of the lens back focus design can be increased, thereby compressing the lens back focus space, reducing the total optical length TTL, and then reducing the overall thickness of the camera module to achieve a lightweight design of the camera module, which is conducive to the application of the camera module in electronic devices to achieve a lightweight design of electronic devices.

[0007] In this application, since there is no need to set a traditional filter between the lens and the photosensitive element, the filter application process is reduced during the assembly process of the camera module, thereby avoiding the risk of glass foreign matter. Therefore, the camera module provided by this application does not need to set a traditional filter. The lens is installed in the first part of the lens barrel and the photosensitive element is installed 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 packaged. This can not only reduce the assembly process of the camera module and improve assembly efficiency, but also avoid the risk of POG during the assembly process.

[0008] In this application, infrared filters are disposed on both sides of at least one lens element, thereby achieving the installation of at least two infrared filters within the lens. The lens element, capable of filtering light within a first wavelength range, is combined with the at least two infrared filters to achieve the infrared filtering function of the lens element. Furthermore, by disposing the infrared filters on both sides of the lens element, the pulling force exerted by the infrared filters on both sides of the lens element can be at least partially offset, thereby reducing or even eliminating the external forces exerted on the lens element by the coating, and further reducing or even eliminating the effects of surface shape variations caused by the coating.

[0009] In some possible implementations, the minimum value in the first wavelength range is smaller than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is smaller than the maximum value in the second wavelength range.

[0010] In this implementation, an infrared filter is used in conjunction with a lens capable of filtering light in a first wavelength range to achieve complementary filtering of longer wavelength light and shorter wavelength light, thereby improving the lens's ability to filter infrared light and further improving the imaging quality of the camera module.

[0011] 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 wavelength in the intersection range of the first wavelength range and the second wavelength range, thereby avoiding the light leakage of some wavelengths of light in the lens, and then ensuring the filtering quality of the lens for infrared light, so as to improve the imaging quality of the camera module.

[0012] 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 arranged alternately one by one, wherein 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.

[0013] In this implementation, the first film with a relatively high refractive index and the second film with a relatively low refractive index are alternately arranged to improve the filtering effect of infrared light and the transmittance of visible light, thereby improving the imaging quality of the camera module.

[0014] In some possible implementations, the thickness d1 of each first film layer satisfies: 1 nm ≤ d1 ≤ 130 nm, and the thickness d2 of each second film layer satisfies: 1 nm ≤ d2 ≤ 130 nm.

[0015] In this implementation, the thickness of the first film and the second film is set so that each layer of the first film and each layer of the second film can achieve the infrared filtering function, so that multiple layers of the first film and multiple layers of the second film can achieve the filtering function of a single infrared filtering film after cooperation.

[0016] In some possible implementations, a portion of the multilayer first film has a first thickness, another portion has a second thickness, and the first films having the first thickness and the first films having the second thickness are alternately arranged. A portion of the multilayer second film has a first thickness, another portion has a second thickness, and the second films having the first thickness and the second films having the second thickness are alternately arranged. The first thickness d3 satisfies the following: 1 nm ≤ d3 < 66 nm, and the second thickness d4 satisfies the following: 66 nm ≤ d4 ≤ 130 nm.

[0017] In this implementation, by alternately arranging a thicker first film and a thinner first film, and alternately arranging a thicker second film and a thinner second film, it is beneficial to the process feasibility of coating the surface of the lens, thereby facilitating the alternating coating of the first film and the second film one by one.

[0018] In some possible implementations, the thickness of a single infrared filter film is less than or equal to 6 μm.

[0019] In this implementation, the thickness of a single infrared filter film is less than or equal to 6 μm to avoid the thickness of a single infrared filter film being too large, which would cause the single infrared filter film to exert excessive pulling force on the lens, thereby avoiding the infrared filter film affecting the surface shape of the lens.

[0020] In some possible implementations, the thickness of a single infrared filter film is the same at all locations.

[0021] In this implementation, the thickness of a single infrared filter membrane is the same at all locations, so that the filtering effect of light at all locations of the single infrared filter membrane is consistent, which is beneficial to improving the stability of light filtering.

[0022] Among them, in the two infrared filter films arranged 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.

[0023] In this implementation, the thickness difference between the two infrared filter films arranged 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 two side surfaces of the lens on the surface of the lens is small, which is conducive to the pulling force of the two infrared filter films on the lens offsetting each other, thereby reducing or even eliminating the influence of the coating on the two side surfaces of the lens on the surface variation of the lens.

[0024] In some possible implementations, the wavelength ranges of light filtered by at least two infrared filters overlap.

[0025] This implementation improves the cutoff depth of all infrared filters for light in the second wavelength range, thereby enhancing the infrared filtering effectiveness of the lens and, in turn, the imaging quality of the camera module. For example, if the wavelength range intersection includes 850nm, the lens can ensure a cutoff depth for light at 850nm, thereby preventing the risk of a warm yellow cast in the image caused by incident light at wide angles.

[0026] The ratio of the extreme difference value of the intersection of the wavelength ranges to the extreme difference value of the wavelength range of the light filtered by the lens is greater than or equal to 50%.

[0027] In this implementation, the cutoff depth of the lens for infrared light is improved, thereby improving the imaging effect of the camera module. The extreme difference value refers to the difference between the maximum and minimum values ​​within the wavelength range.

[0028] In some possible implementations, the number of lenses is at least 4, and the infrared filter membrane is arranged on both side surfaces of the first lens close to the image side of the lens; or, the infrared filter membrane is arranged on both side surfaces of the second lens close to the image side of the lens; or, the infrared filter membrane is arranged on both side surfaces of the third lens close to the image side of the lens.

[0029] In this implementation, according to the principles of geometric optics, the incident angles of the main light on the object side and image side of the first, second and third lenses close to the image side of the lens are relatively small. Therefore, the spectral offset of the spectral curve of the infrared filter film on the object side and image side of the first, second and third lenses located on the image side of the lens is also small, thereby reducing the offset of the infrared filter film in different fields of view, thereby reducing the risk of color cast, and further reducing the drop value of the color shading curve of the infrared filter film. While reducing the pressure of color correction, the color of the camera module imaging can be made more natural and realistic.

[0030] In some possible implementations, the plurality of lenses include at least one plastic lens, and the infrared filter films are disposed on both side surfaces of the at least one plastic lens.

[0031] In this implementation, plastic lenses are easy to prepare, which helps reduce the difficulty of lens preparation. By providing infrared filter films on both sides of the plastic lens, the pulling force of the infrared filter films on both sides of the plastic lens can be at least partially offset, thereby reducing or even eliminating the surface shape variation caused by surface coating of the plastic lens.

[0032] The plastic lens provided with an infrared filter film is located on the image side of the first lens close to the object side of the lens.

[0033] In this implementation, the plastic lens with the infrared filter is not placed as the first lens on the object side. This prevents excessively large incident angles of light on the image side of the first lens, which could cause spectral transmittance drift across different fields of view and increase the risk of color shading. Furthermore, placing the plastic lens with the infrared filter as the first lens on the object side could cause the ID side of the lens to glow red, leading to ID risks. Furthermore, having a plastic lens as the first lens element hinders the lens's slim design.

[0034] In some possible implementations, the plurality of lenses include a plastic lens doped with a color masterbatch, and the plastic lens doped with the color masterbatch is used to filter light within a first wavelength range.

[0035] In this implementation, a color masterbatch is doped into a piece of plastic lens, so that the plastic lens doped with the color masterbatch can filter part of the infrared rays, that is, it can filter the light in the first wavelength range, and the plastic lens doped with the color masterbatch can also absorb ultraviolet rays or part of the blue light band, thereby improving the risk of false color caused by canceling the filter in the camera module.

[0036] The plastic lens doped with the color masterbatch is located on the image side of the first lens close to the object side of the lens, so as to avoid the plastic lens doped with the color masterbatch affecting the appearance of the camera module due to its own color.

[0037] In some possible implementations, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens doped with the color masterbatch is in a range of 1 to 1.15.

[0038] In this implementation, the effective thickness of the color masterbatch-doped plastic lens is minimized, thereby improving the consistency of the light filtering effect of the color masterbatch-doped plastic lens. For example, the ratio of the maximum effective thickness to the minimum effective thickness of the color masterbatch-doped plastic lens can be 1, 1.03, 1.06, 1.09, 1.12, 1.15, or other values ​​between 1 and 1.15. It should be noted that the effective thickness of the color masterbatch-doped plastic lens refers to the thickness of the portion of the color masterbatch-doped plastic lens that transmits light.

[0039] In some possible implementations, the number of lenses is at least four, and the plastic lens doped with the color masterbatch is the second lens or the third lens close to the object side of the lens.

[0040] In this implementation, in the lens design, the effective thickness difference of the second lens or the third lens close to the object side of the lens is usually small. By designing the second lens or the third lens close to the object side of the lens as a plastic lens and doping it with masterbatch, the consistency of the filtering effect of light at various parts of the plastic lens doped with masterbatch can be improved.

[0041] In some possible implementations, the plastic lens doped with the color masterbatch and the plastic lens with infrared filter films provided on both sides thereof are the same plastic lens.

[0042] In this implementation, since the effective thickness difference of the plastic lens doped with the color masterbatch is small, the surface flatness of the plastic lens doped with the color masterbatch is high, thereby reducing the process difficulty of setting an infrared filter film on both side surfaces of the plastic lens doped with the color masterbatch.

[0043] In some other possible implementations, the plastic lens doped with the color masterbatch and the plastic lens with infrared filter films provided on both sides are different plastic lenses.

[0044] In this implementation, the plastic lens with infrared filter films on both sides can be located on the image side or object side of the plastic lens doped with color masterbatch, which improves the flexibility of the relative position design of the plastic lens with infrared filter films 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 actual application requirements.

[0045] In some possible implementations, the multiple lenses include a glass lens and three plastic lenses, which are arranged in sequence along the object side of the lens pointing toward the image side of the lens.

[0046] In this implementation, the lens architecture is designed as a 1G+3P architecture, which helps reduce the overall height of the lens. Here, G represents a glass lens and P represents a plastic lens.

[0047] In some possible implementations, the plurality of lenses includes four plastic lenses.

[0048] In this implementation, a 4P architecture is formed by designing an all-plastic lens, which can reduce the overall manufacturing process of the lens and thus reduce production costs.

[0049] In some possible implementations, the plurality of lenses include a glass lens made of blue glass material, and the glass lens made of blue glass material is used to filter light in a first wavelength range.

[0050] In this implementation, a blue glass lens, combined with at least two infrared filters, filters light within a combined first and second wavelength ranges, thereby achieving the lens's infrared filtering function. This reduces or eliminates image noise in low-light conditions, improves the reproduction of imaging details, and makes the resulting image more consistent with the human eye's perception. Because the infrared filtering function is achieved through the lens, eliminating the need for a traditional filter between the lens and the photosensitive element, the freedom of lens back focus design is increased, thereby compressing the lens' back focus space, reducing the total optical length (TTL), and ultimately reducing the overall thickness of the camera module, achieving a lightweight and thin camera module design. This facilitates the application of camera modules in electronic devices and the realization of lightweight and thin electronic devices.

[0051] In some possible implementations, the glass lens made of blue glass material is the first lens close to the object side of the lens.

[0052] In this implementation, since the first lens element close to the object side of the lens can be spherical, the glass lens element made of blue glass material can be prepared using a grinding process, thereby reducing the difficulty of the preparation process of the glass lens element made of blue glass material.

[0053] In some other possible implementations, the glass lens made of blue glass material is the second lens close to the object side of the lens.

[0054] In this implementation, the first lens close to the object side of the lens can be a glass lens, and the second lens can be a glass lens made of blue glass material. The use of a two-glass lens structure is conducive to compressing the thickness of the lens, thereby facilitating the realization of a lightweight and thin design of the lens.

[0055] Among them, the glass lens made of blue glass material can also be prepared by a low-temperature molding process. The blue glass material is molded into the first lens or the second lens close to the object side of the lens through the molding process. The low-temperature molding process can avoid the high temperature causing the ion components in the blue glass material to volatilize and reduce the infrared cutting effect.

[0056] In some possible implementations, the first lens element close to the object side of the lens is a glass lens, and the total optical length TTL of the lens satisfies: TTL<2.25 mm.

[0057] In this implementation, 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 lens is made thinner as a whole, which is beneficial to the lightweight design of the camera module, and thus is beneficial to the application of the camera module in electronic equipment, so that the electronic equipment can achieve a lightweight design.

[0058] In some possible implementations, the total optical length TTL of the lens and the focal length EFL of the lens satisfy: EFL / TTL>0.8.

[0059] In this implementation, by limiting the total length TTL of the lens and the focal length EFL of the lens, it is possible to take into account both the requirement of telephoto shooting and the requirement of short total length of the lens, which is conducive to the lightweight design of the lens.

[0060] In some possible implementations, the back focal length FBL of the lens satisfies: FBL<0.5mm.

[0061] In this implementation, the back focal length FBL of the lens is designed so that after the filter is removed from the camera module, the back focal length of the lens is compressed to reduce the height of the lens, which is conducive to the lightweight design of the camera module.

[0062] In some possible implementations, the back focal length FBL of the lens and the total optical length TTL of the lens meet the following conditions: 0.1 <fbl ttl>0.3.

[0063] 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 meets the imaging requirements, and the value of the back focal length FBL of the lens is controlled within a smaller range, which is conducive to the lightweight design of the lens, and thus conducive to the lightweight design of the camera module.

[0064] In some possible implementations, the field of view (FOV) of the lens satisfies: 80° < FOV < 110°.

[0065] In this implementation, by limiting the range of the field of view angle FOV, the field of view size and optical magnification of the lens can be kept appropriate.

[0066] In some possible implementations, at least two lenses in the plurality of lenses have an Abbe number greater than 55.

[0067] In this implementation, the dispersion of the lens is reduced, which is beneficial to the imaging effect of the camera module.

[0068] In a second aspect, the present application also provides an electronic device, which includes an image processor and a camera module as in any of the aforementioned implementation methods, the image processor being communicatively connected to the camera module, and the image processor being used to obtain image data from the camera module and process the image data.

[0069] In some possible implementations, the electronic device further includes a screen and a back shell. The screen is mounted to the back shell, forming an enclosed interior space. The camera module is mounted in the interior space, with the screen located on the object side of the camera module's lens. The screen includes a translucent cover plate and a display screen, which are stacked together. The translucent cover plate is located on the side of the display screen away from the lens, and the screen has a translucent area corresponding to the lens. There are at least three infrared filters, one of which is disposed on the surface of the translucent cover plate facing the lens and corresponding to the translucent area.

[0070] In this implementation, the infrared filter film arranged on the transparent cover plate and the infrared filter film arranged on the two side surfaces of at least one lens in the lens jointly filter the light in the second wavelength range, and the plastic lens doped with the masterbatch material in the lens or the glass lens made of blue glass material in the lens filters the light in the first wavelength range, thereby realizing the infrared filter film arranged on the transparent cover plate and cooperating with the lens to realize the infrared filtering function.

[0071] In addition, since the infrared filter film arranged on the transparent cover can filter part of the light within the second wavelength range, the total thickness of the infrared filter film arranged in the lens can be reduced, thereby reducing the thickness of a single infrared filter film. In addition, the surface pulling force received by the lens with infrared filter films arranged on both sides is beneficial to reducing the risk of surface shape variation of the lens with infrared filter films arranged on both sides.

[0072] In a third aspect, the present application further provides an electronic device, which includes a screen, a back shell, a camera module, and an infrared filter. The screen is mounted on the back shell, forming an internal space. The camera module is mounted in the internal space, and 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. The lens includes a plurality of lenses, and the plurality of lenses are arranged in a direction from the object side of the lens to the image side of the lens. One of the plurality of lenses is used to filter light in a first wavelength range. The screen includes a light-transmitting cover plate and a display screen, and 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 is provided on the surface of the light-transmitting cover plate facing the lens, and the infrared filter is provided corresponding to the light-transmitting area. The infrared filter is used to filter light in a second wavelength range. The combination of the first wavelength range and the second wavelength range is 700nm to 1000nm.

[0073] In this implementation, the infrared filtering function is achieved by cooperating with the lens through an infrared filter membrane provided on the surface of the transparent cover plate facing the lens, 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, thereby reducing the thickness of the camera module and facilitating a lightweight design.

[0074] In a fourth aspect, the present application also provides an electronic device comprising a camera module, a screen, a back shell, and at least two infrared filters. The screen is mounted on the back shell, enclosing an interior space. The camera module is mounted in the interior space and comprises a lens and a photosensitive element, the photosensitive element being located on the image side of the lens, and the screen being located on the object side of the lens. The lens comprises multiple lenses arranged from the object side of the lens toward the image side of the lens. One of the multiple lenses is configured to filter light within a first wavelength range. The multiple lenses comprise at least one glass lens, at least one of which has an infrared filter disposed on one surface. The screen comprises a transparent cover plate and a display screen, the transparent cover plate and the display screen being stacked, the transparent cover plate being located on the side of the display screen away from the lens. The screen has a light-transmitting area corresponding to the lens. One of the at least two infrared filters is disposed on the surface of the transparent cover plate facing the lens, corresponding to the light-transmitting area. All of the infrared filters are configured to filter light within a second wavelength range, the combined wavelength of the first and second wavelength ranges being 700 nm to 1000 nm.

[0075] In this implementation, due to the high hardness of glass, an infrared filter is provided on one side of the glass lens, resulting in minimal or no deformation of the lens's surface. The infrared filter provided on the surface of the transparent cover plate facing the lens, the lens element in the lens that filters the first wavelength range, and the infrared filter provided on the surface of the glass lens all work together to achieve infrared filtering. This eliminates the need for a filter in the camera module, facilitating a reduction in the lens' back focal length and, consequently, the thickness of the camera module, contributing to a slimmer and lighter design.

[0076] In some possible implementations, the minimum value in the first wavelength range is smaller than the minimum value in the second wavelength range, and the maximum value in the first wavelength range is smaller than the maximum value in the second wavelength range.

[0077] In this implementation, an infrared filter is used in conjunction with a lens capable of filtering light in a first wavelength range to achieve complementary filtering of longer wavelength light and shorter wavelength light, thereby improving the lens's ability to filter infrared light and further improving the imaging quality of the camera module.

[0078] 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 arranged alternately one by one, wherein 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.

[0079] In this implementation, the first film with a relatively high refractive index and the second film with a relatively low refractive index are alternately arranged to improve the filtering effect of infrared light and the transmittance of visible light, thereby improving the imaging quality of the camera module.

[0080] In some possible implementations, the thickness d1 of each first film layer satisfies: 1 nm ≤ d1 ≤ 130 nm, and the thickness d2 of each second film layer satisfies: 1 nm ≤ d2 ≤ 130 nm.

[0081] In this implementation, the thickness of the first film and the second film is set so that each layer of the first film and each layer of the second film can achieve the infrared filtering function, so that the filtering function of a single infrared filter film 12 can be achieved after multiple layers of first films and multiple layers of second films are combined.

[0082] In some possible implementations, a portion of the multilayer first film has a first thickness, another portion has a second thickness, and the first films having the first thickness and the first films having the second thickness are alternately arranged. A portion of the multilayer second film has a first thickness, another portion has a second thickness, and the second films having the first thickness and the second films having the second thickness are alternately arranged. The first thickness d3 satisfies the following: 1 nm ≤ d3 < 66 nm, and the second thickness d4 satisfies the following: 66 nm ≤ d4 ≤ 130 nm.

[0083] In this implementation, by alternately arranging a thicker first film and a thinner first film, and alternately arranging a thicker second film and a thinner second film, it is beneficial to the process feasibility of coating the surface of the lens, thereby facilitating the alternating coating of the first film and the second film one by one.

[0084] In some possible implementations, the thickness of a single infrared filter film is less than or equal to 6 μm.

[0085] In this implementation, the thickness of a single infrared filter is less than or equal to 6 μm to prevent excessive thickness. This prevents excessive pulling force from the infrared filter on a lens, thereby minimizing the effect of the infrared filter on the lens's surface shape. For infrared filters installed on a transparent cover, this prevents excessive pulling force from the infrared filter on the transparent cover, while also minimizing any impact on the electronic device's appearance.

[0086] In some possible implementations, 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 close to the object side of the lens.

[0087] In this implementation, the infrared filtering function is achieved by providing an infrared filter membrane on the surface of the light-transmitting cover facing the lens in conjunction with a plastic lens doped with masterbatch in the lens, thereby eliminating the need for a filter in the camera module, which is beneficial for compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a lightweight design.

[0088] In some other possible implementations, the infrared filter film disposed on the surface of the glass lens and the infrared filter film disposed on the surface of the transparent cover plate facing the lens are used together to filter light in the second wavelength range.

[0089] In this implementation, due to the high hardness of glass, an infrared filter is applied to one side of the glass lens, resulting in minimal or no deformation of the lens's surface. The infrared filter applied to the lens-facing surface of the transparent cover, the plastic lens doped with color masterbatch within the lens, and the infrared filter applied to the glass lens collectively achieve infrared filtering. This eliminates the need for a filter within the camera module, facilitating a reduction in the lens' back focal length and, consequently, the thickness of the camera module, contributing to a slimmer and lighter design.

[0090] 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 a first wavelength range, and the glass lens made of blue glass material is the first lens or the second lens close to the object side of the lens.

[0091] In this implementation, the infrared filtering function is achieved by providing an infrared filter membrane on the surface of the transparent cover facing the lens in conjunction with a glass lens made of blue glass material in the lens, thereby eliminating the need to provide a filter in the camera module, which is beneficial for compressing the back focal length of the lens, thereby reducing the thickness of the camera module and facilitating a lightweight design.

[0092] In some other possible implementations, the infrared filter film disposed on the surface of the glass lens and the infrared filter film disposed on the surface of the transparent cover plate facing the lens are used together to filter light in the second wavelength range.

[0093] In this implementation, the infrared filtering function is achieved by an infrared filter membrane arranged on the surface of the transparent cover facing the lens, a glass lens made of blue glass material in the lens, and an infrared filter membrane arranged on the surface of the glass lens. As a result, there is no need to set 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 lightweight design.

[0094] The glass lens with the infrared filter film on the surface of the lens and the glass lens made of blue glass material can be the same lens or different lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] FIG1A is a schematic structural diagram of an electronic device provided in some embodiments of the present application;

[0096] FIG1B is a schematic diagram of a partially exploded structure of the electronic device shown in FIG1A ;

[0097] FIG2A is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in some embodiments;

[0098] FIG2B is a schematic diagram illustrating the principle of light filtering by the lens in the camera module shown in FIG1A in some embodiments;

[0099] FIG3A is a schematic structural diagram of a single infrared filter in the camera module shown in FIG2A in some embodiments;

[0100] FIG3B is a schematic structural diagram of the thickness distribution of each layer of the infrared filter shown in FIG3A in some embodiments;

[0101] FIG4A is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in other embodiments;

[0102] FIG4B is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in further embodiments;

[0103] FIG5A is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in further embodiments;

[0104] FIG5B is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in further embodiments;

[0105] FIG6A is a schematic diagram of light passing through the lens of the camera module shown in FIG4A at different fields of view;

[0106] FIG6B is a schematic diagram of light filtering by a plastic lens doped with a color masterbatch in the camera module shown in FIG6A ;

[0107] FIG6C is a schematic diagram illustrating light filtering by an infrared filter disposed on the object side of a plastic lens doped with a color masterbatch in the camera module shown in FIG6A ;

[0108] FIG6D is a schematic diagram illustrating light filtering by an infrared filter disposed on the image side of a plastic lens doped with a color masterbatch in the camera module shown in FIG6B ;

[0109] FIG6E is a schematic diagram of two infrared filters in the camera module shown in FIG6A filtering light together;

[0110] FIG6F is a schematic diagram illustrating the transmittance offset of the lens in the camera module shown in FIG6A for light of different fields of view;

[0111] FIG7A is a schematic diagram of light passing through a lens in a camera module in the prior art under different fields of view in some embodiments;

[0112] FIG7B is a schematic diagram illustrating the transmittance offset of the lens in the camera module shown in FIG7A for light of different fields of view;

[0113] FIG8A is a schematic diagram showing the transmittance ratios of red light and green light in different fields of view for the camera modules in the embodiment shown in FIG6A and the prior art shown in FIG7A when there is no light source;

[0114] FIG8B is a schematic diagram showing the transmittance ratios of blue light and green light in different viewing fields for the camera modules in the embodiment shown in FIG6A and the prior art shown in FIG7A when there is no light source;

[0115] FIG8C is a schematic diagram showing a comparison of imaging colors and shadows of light in different fields of view by the camera module in the embodiment shown in FIG6A and the prior art shown in FIG7A when there is no light source;

[0116] 9A is a schematic diagram showing the transmittance ratio of red light and green light in different fields of view for the camera module in the embodiment shown in FIG. 6A and the prior art shown in FIG. 7A when illuminated by a light source;

[0117] 9B is a schematic diagram showing the transmittance ratios of blue light and green light in different fields of view for the camera modules in the embodiment shown in FIG. 6A and the prior art shown in FIG. 7A when illuminated by a light source;

[0118] FIG9C is a schematic diagram comparing the color and shadow of images of light in different fields of view by the camera modules in the embodiment shown in FIG6A and the prior art shown in FIG7A when illuminated by a light source;

[0119] FIG10 is a schematic structural diagram of a lens and a photosensitive element in the camera module shown in FIG4A in some embodiments;

[0120] FIG11 is a schematic structural diagram of the lens and photosensitive element in the camera module shown in FIG4A in other embodiments;

[0121] FIG12 is a schematic structural diagram of the lens and photosensitive element in the camera module shown in FIG4A in further embodiments;

[0122] FIG13A is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in further embodiments;

[0123] FIG13B is a schematic structural diagram of a camera module in the electronic device shown in FIG1A in further embodiments;

[0124] FIG14A is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some embodiments;

[0125] FIG14B is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some other embodiments;

[0126] FIG15A is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some further embodiments;

[0127] FIG15B is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some other embodiments;

[0128] FIG16A is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some further embodiments;

[0129] FIG16B is a schematic diagram of a partial structure of the electronic device shown in FIG1A taken along line AA in some further embodiments. DETAILED DESCRIPTION

[0130] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0131] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood broadly. For example, "connected" can mean a detachable or non-detachable connection; it can be a direct connection or an indirect connection through an intermediary. "Multiple" means at least two.

[0132] The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inside", "outside", "top", "bottom", "side", etc., are only references to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0133] In the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, perpendicular, aligned, etc., are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately perpendicular, approximately aligned, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0134] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features.

[0135] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.

[0136] The optical axis is a line perpendicular to the center of the lens. It's the axis running through the centers of each lens element. When light rays parallel to the optical axis enter a convex lens, an ideal convex lens would have all the rays converge at a single point behind the lens. This point is the focal point.

[0137] Focus is the point where parallel light rays converge after being refracted by a lens or mirror.

[0138] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens to the focal plane, when an object at infinite distance forms a sharp image on the focal plane. 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 infinite distance. For a fixed-focus lens, the position of its optical center is fixed; for a telephoto lens, changes in the optical center result in changes in the focal length.

[0139] Effective focal length (EFL) refers to the distance from the center of the lens to the focal point.

[0140] The object side is divided by the lens. The side where the object is located is called the object side, and the surface of the lens close to the object side is called the object side.

[0141] The image side, with the lens as the boundary, the side where the image of the object is located is called the image side, and the surface of the lens close to the image side is called the image side.

[0142] The imaging plane is located on the image side of all the lenses in the lens, and is the plane on which the image is formed after light passes through each lens in the lens in sequence.

[0143] The back focus length (FBL) of the lens is the distance from the image side of the last lens element to the imaging surface.

[0144] Total track length (TTL) refers to the total length from the surface of the lens closest to the object side to the imaging surface. TTL is the main factor affecting the height of the camera.

[0145] Relative illumination (RI) is the ratio of the illumination at any point on the photosensitive element to the maximum illumination in the field of view.

[0146] The aperture diaphragm is a device used to control the amount of light that passes through the lens and enters the photosensitive surface inside the camera body. It is usually inside the lens.

[0147] The chief ray angle (CRA) is the angle between the principal ray and the parallel ray. The principal ray is the ray emitted from the edge of the object, passes through the center of the aperture stop, and finally reaches the edge of the imaging surface.

[0148] Aperture, also known as F-number (Fno), is a relative value calculated by dividing the focal length of a lens by the diameter of its entrance pupil (the inverse of the relative aperture). The smaller the aperture, the more light enters the image per unit time. A larger aperture reduces the depth of field, blurring the background in photos, similar to the effect of a telephoto lens.

[0149] The Abbe number (Abbe), also known as the dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths, representing the degree of dispersion of the material.

[0150] In optical instruments, the field of view (FOV) is the angle between the two edges of the maximum range through which the image of the measured object can pass, with the lens as the vertex. The field of view determines the visual range of the optical instrument. A larger field of view means a wider field of view and a smaller optical magnification.

[0151] Color shading occurs when a lens reflects light differently from its center to its edges, resulting in an uneven, gradually darkening image from the center to the edges of a uniformly bright image. This shading manifests as a color difference between the center of the image and its surroundings, indicating a misalignment of the RGB planes.

[0152] Distortion, also known as distortion, refers to the degree to which the image formed by an optical system is distorted relative to the object itself. Distortion is caused by spherical aberration. The height at which the chief rays of light from different fields of view intersect the Gaussian image plane after passing through the optical system is not equal to the ideal image height. The difference between the two is the distortion. Therefore, distortion only changes the image position of off-axis object points on the ideal plane, distorting the image shape but not affecting image clarity.

[0153] Please refer to Figure 1A and Figure 1B in combination. Figure 1A is a structural diagram of an electronic device 100 provided in some embodiments of the present application; Figure 1B is a partial exploded structural diagram of the electronic device 100 shown in Figure 1A.

[0154] In some embodiments, the electronic device 100 can be a device with a camera function, such as 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, an in-vehicle device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet. In the embodiment of FIG1A , the electronic device 100 is described as a non-folding mobile phone. Of course, other types of electronic devices 100 can also adopt similar structures, such as folding mobile phones, and will not be described in detail below.

[0155] It will be understood that Figures 1A and 1B only schematically illustrate some components included in the electronic device 100, and the actual shape, actual size, actual position and actual structure of these components are not limited by Figures 1A and 1B. The electronic device 100 may also include more or fewer components compared to Figures 1A and 1B.

[0156] In some embodiments, the electronic device 100 may include a camera module 10, a screen 20, and a back cover 30. The screen 20 is used to display images, videos, and the like. The screen 20 may include a translucent cover 201 and a display screen 202. The translucent cover 201 and the display screen 202 are stacked and fixedly connected. The translucent cover 201 is primarily used to protect and dustproof the display screen 202. The material of the translucent cover 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 (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (OLED) display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0157] Exemplarily, the back shell 30 is used to protect the internal electronic components of the electronic device 100. The back shell 30 may include a back cover 301 and a frame 302. The back cover 301 is located on the side of the display screen 202 away from the transparent cover plate 201, and is stacked with the transparent cover plate 201 and the display screen 202. The frame 302 is fixed to the back cover 301. Exemplarily, the frame 302 may be fixed to the back cover 301 by adhesive. The frame 302 may also be an integrally molded structure with the back cover 301, that is, the frame 302 and the back cover 301 are a single unitary structure. The frame 302 is located between the back cover 301 and the transparent cover plate 201. The transparent cover plate 201 may be fixed to the frame 302 by adhesive. The transparent cover plate 201, the back cover 301, and the frame 302 enclose an internal space 40 of the electronic device 100. The internal space 40 accommodates the display screen 202. The back cover 301 may be made of metal, plastic, glass or other materials. The back cover 301 may be a plate made of a single material, or a plate structure made of multiple materials and composed of multiple panels.

[0158] Exemplarily, the camera module 10 is used to take photos / videos. Exemplarily, the camera module 10 is installed in the internal space 40. Among them, the camera module 10 can be used as a front camera. The screen 20 can 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 enter 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 201. A light path avoidance hole is provided on the display screen 202. The light path avoidance hole allows the scene light to pass through the light-transmitting cover 201 and enter the light incident surface of the camera module 10.

[0159] In other embodiments, the camera module 10 can also function as a rear camera. For example, a light hole is provided on the back cover 301, and the light-entering surface of the camera module 10 is provided corresponding to the light hole, allowing scene light to enter the light-entering surface of the camera module 10. In other embodiments, the electronic device 100 can further include one or more other camera modules 10 (not shown in the figure), which is not strictly limited in the present embodiment.

[0160] In some embodiments, as shown in FIG1B , 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 being located inside the electronic device 100, and the image processor 60 being 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 used to obtain image data from the camera module 10 and process the image data. The communication connection between the camera module 10 and the image processor 60 may include data transmission through electrical connection methods such as wiring, or data transmission may be achieved through coupling or the like. It is understandable that the camera module 10 and the image processor 60 may also be communicatively connected through other methods that can achieve data transmission.

[0161] 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). The analog-to-digital converter is connected between the camera module 10 and the image processor 60. The analog-to-digital converter is used to convert the signal generated by the camera module 10 into a digital image signal and transmit it to the image processor 60. The image processor 60 then processes the digital image signal and ultimately displays the image or video on the screen 20.

[0162] In some embodiments, the electronic device 100 may further include a memory (not shown), which is communicatively connected to the image processor 60. The image processor 60 processes the digital image signal and then transfers the image to the memory, so that the image can be retrieved from the memory and displayed on the screen 20 at any time when the image is needed. In some embodiments, the image processor 60 may also compress the processed digital image signal before storing it in the memory to save memory space.

[0163] In some other embodiments, the electronic device 100 may not include the screen 20 .

[0164] It is understood that the installation position of the camera module 10 of the electronic device 100 in the embodiment shown in Figures 1A and 1B is merely illustrative, and this 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 in other positions of the electronic device 100, for example, the camera module 10 may be installed in 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 be rotated, moved, or removed relative to the terminal body, and the camera module 10 may also be set on the auxiliary component.

[0165] Please refer to Figures 2A and 2B in combination. Figure 2A is a structural schematic diagram of the camera module 10 in the electronic device 100 shown in Figure 1A in some embodiments; Figure 2B is a schematic diagram of the principle of filtering light by the lens 1 in the camera module 10 shown in Figure 1A in some embodiments.

[0166] In some embodiments, the camera module 10 may include a lens 1, a photosensitive element 2, and a lens barrel 3. The lens barrel 3 may include a first portion 3a and a second portion 3b stacked together, extending from the object side of the lens 1 toward the image side of the lens 1. The first portion 3a of the lens barrel 3 is configured to accommodate and mount the lens 1, while the second portion 3b of the lens barrel 3 is configured to accommodate and mount the photosensitive element 2. The lens 1 may be configured to filter light within a wavelength range of 700 nm to 1000 nm.

[0167] In this embodiment, the camera module 10 can filter light within the range of 700nm to 1000nm through the lens 1 to achieve an infrared filtering function. This can eliminate infrared interference, reduce or avoid image noise in low-light conditions, improve the restoration of imaging details, and make the resulting image more consistent with the perception of the human eye. Because 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. This can increase the freedom of the back focus design of the lens 1, thereby compressing the back focus space of the lens 1, reducing the total optical length (TTL), and further reducing the overall thickness of the camera module 10, thereby achieving a lightweight design of the camera module 10. This is conducive to the application of the camera module 10 in the electronic device 100 and achieving a lightweight design of the electronic device 100.

[0168] Furthermore, in this embodiment, since a traditional filter is not required between the lens 1 and the photosensitive element 2, the filter application process is reduced during the assembly process of the camera module 10, thereby avoiding the risk of particles on glass (POG). Therefore, the camera module 10 provided in the embodiment of the present application does not require a traditional filter. The lens 1 is installed in the first portion 3a of the lens barrel 3, and the photosensitive element 2 is installed in the second portion 3b of the lens barrel 3. The first portion 3a of the lens barrel 3 and the second portion 3b of the lens 1 can be directly packaged. This not only reduces the assembly process of the camera module 10 and improves assembly efficiency, but also avoids the risk of POG during the assembly process.

[0169] It should be noted that the lens 1 can also be used to filter light within other wavelength ranges. For example, the lens 1 can also be used to filter light within the range of 680nm to 1150nm, or light within the range of 700nm to 1150nm, or light within the range of 680nm to 1250nm, etc., as long as the light band filtered by the lens 1 can achieve the infrared filtering function to reduce or even eliminate the interference of infrared light on imaging. In the embodiment of the present application, the lens 1 is used to schematically illustrate that it can be used to filter light within the range of 680nm to 1150nm. It can be understood that the embodiment of the present application does not limit the wavelength range of light filtered by the lens 1. In actual applications, it can be designed according to different camera specifications and application scenario requirements.

[0170] Exemplarily, the lens 1 may include multiple lens elements 11 and at least two infrared filters 12. The multiple lens elements 11 are arranged in a direction from the object side of the lens 1 toward the image side. One lens element 11 in the multiple lens elements 11 is configured to filter light within a first wavelength range. Infrared filters 12 are provided on both sides of at least one lens element 11 in the multiple lens elements 11. Together, all infrared filters 12 are configured to filter light within a second wavelength range. The combination of the first wavelength range and the second wavelength range constitutes the wavelength range filtered by the lens 1. For example, the combination of the first wavelength range and the second wavelength range is 680 nm to 1250 nm.

[0171] In this embodiment, infrared filters 12 are disposed on both sides of at least one lens element 11, thereby achieving the installation of at least two infrared filters 12 within the lens 1. The lens element 11, which is capable of filtering light within a first wavelength range, and the at least two infrared filters 12 are combined to achieve the infrared filtering function of the lens 1. Furthermore, by disposing the infrared filters 12 on both sides of the lens element 11, the pulling force exerted by the infrared filters 12 on both sides of the lens element 11 can be at least partially offset, thereby reducing or even eliminating the external forces exerted on the lens 1 by the coating, and further reducing or even eliminating the effects of surface shape variations caused by the coating.

[0172] For example, as shown in Figure 2B, the dashed line illustrates the transmittance of the infrared filtering lens 11 for light of different wavelengths, the dashed line illustrates the transmittance of all infrared filter films 12 for light of different wavelengths, and the solid line illustrates the transmittance of the lens 1 as a whole for light of different wavelengths. The first wavelength range is 680nm to 750nm, and the second wavelength range is 750nm to 1150nm. The lens 1 is capable of filtering light of wavelengths between 680nm and 1150nm.

[0173] It should be noted that the filtering curves of the lens 1 for light of different wavelengths shown in FIG. 2B are merely illustrative and do not limit the cutoff degree of the lens 1 for light of different wavelengths.

[0174] The minimum value in the first wavelength range can be smaller than the minimum value in the second wavelength range, and the maximum value in the first wavelength range can be smaller 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 filter 12 is used to filter light with longer wavelengths.

[0175] In this embodiment, the infrared filter film 12 is used in conjunction with the lens 11 capable of filtering light in the first wavelength range to achieve complementary filtering of light with longer wavelengths and light with shorter wavelengths, thereby improving the ability of the lens 1 to filter infrared light, and further improving the imaging quality of the camera module 10.

[0176] The first wavelength range and the second wavelength range may intersect, which is beneficial for achieving a cutoff depth effect for wavelengths in the intersection of the first wavelength range and the second wavelength range, thereby preventing light leakage of some wavelengths from the lens 1, thereby ensuring the filtering quality of infrared light by the lens 1, and improving the imaging quality of the camera module 10. For example, the first wavelength range may be 680nm to 950nm, and the second wavelength range may be 750nm to 1150nm.

[0177] The wavelength ranges filtered by at least two infrared filters 12 may overlap, which helps improve the cutoff depth of light within the second wavelength range when all infrared filters 12 are combined, thereby enhancing the infrared filtering effectiveness of lens 1 and, in turn, the imaging quality of camera module 10. For example, if the wavelength range intersection includes 850 nm, lens 1 can ensure a cutoff depth for light at 850 nm, thereby preventing the risk of a warm yellow cast in the image caused by incident light at wide angles.

[0178] The ratio of the range difference of the intersection of the wavelength ranges to the range difference of the wavelength range of light filtered by lens 1 can be greater than or equal to 50%, thereby improving the cutoff depth of lens 1 for infrared light, thereby improving the imaging effect of camera module 10. The range difference refers to the difference between the maximum and minimum values ​​within the wavelength range.

[0179] For example, among the at least two infrared filters 12, one infrared filter 12 can filter light from 700nm to 1050nm, and the other infrared filter 12 can filter light from 800nm ​​to 1150nm. The intersection of the wavelength ranges is 800nm ​​to 1050nm, and its range is 250nm. The lens 1 can filter light from 680nm to 1150nm. The range of the wavelength range filtered by the lens 1 is 470nm, and the ratio of the two is 250nm / 470nm = 53.19%.

[0180] In some embodiments, the first lens element 11 on the object side of the lens 1 is a glass lens element 111, and the total optical length (TTL) of the lens 1 satisfies the following condition: TTL < 2.25 mm. For example, the total optical length (TTL) of the lens 1 can be, but is not limited to, 1.5 mm, 1.7 mm, 1.9 mm, 2.1 mm, 2.25 mm, or other values ​​less than 2.25 mm.

[0181] In this embodiment, the first lens 11 is a glass lens 111, which is beneficial to compressing the overall height of the lens 1. By designing the total optical length TTL of the lens 1, the lens 1 is made thinner as a whole, which is beneficial to the lightweight design of the camera module 10, thereby facilitating the application of the camera module 10 in the electronic device 100, so that the electronic device 100 can achieve a lightweight design.

[0182] The total 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 may be, but is not limited to, 0.86, 0.87, 0.88, or other values ​​greater than 0.8.

[0183] In this embodiment, by limiting the total length TTL of the lens 1 and the focal length EFL of the lens 1 , it is possible to take into account both the telephoto shooting requirement and the short total length requirement of the lens 1 , which is conducive to the lightweight design of the lens 1 .

[0184] 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 may be, but is not limited to, 0.45 mm, 0.35 mm, 0.25 mm, 0.15 mm, or other values ​​less than 0.5 mm.

[0185] In this embodiment, the back focal length FBL of the lens 1 is designed so that after the filter is removed from 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 lightweight design of the camera module 10.

[0186] Among them, the back focal length FBL of lens 1 and the total optical length TTL of lens 1 meet the following conditions: 0.1 <fbl ttl>For example, the value of FBL / TTL may be, but is not limited to, 0.12, 0.16, 0.2, 0.24, 0.28, or other values ​​between 0.1 and 0.3.

[0187] In this embodiment, by limiting 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 meets the imaging requirements, and the value of the back focal length FBL of the lens 1 is controlled within a smaller range, which is beneficial to the lightweight design of the lens 1, and thus beneficial to the lightweight design of the camera module 10.

[0188] The field of view (FOV) of lens 1 satisfies the following: 80° < FOV < 110°. For example, the field of view (FOV) of lens 1 may be, but is not limited to, 81°, 85°, 90°, 95°, 100°, 105°, 108°, or other values ​​between 80° and 110°.

[0189] In this embodiment, by limiting 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.

[0190] The Abbe number of at least two lenses 11 among the multiple lenses 11 is greater than 55, so that the dispersion of the lens 1 is small, which is beneficial to the imaging effect of the camera module 10 .

[0191] In some examples, the lens 1 may include four lenses 11 , pointing from the object side of the lens 1 to the image side of the lens 1 , and the four lenses 11 are glass lens 111 , plastic lens 112 , plastic lens 112 , and plastic lens 112 in sequence.

[0192] In this embodiment, the lens 1 is designed to have a 1G+3P structure, which is beneficial for reducing the overall height of the lens 1. Here, G represents a glass lens, and P represents a plastic lens.

[0193] The second lens element 11, located on the object side of the lens 1, has the highest refractive index. For example, in 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 element 11 is 1.48, and the Abbe number is 78.0; the refractive index of the second lens element 11 is 1.67, and the Abbe number is 19.2; the refractive index of the third lens element 11 is 1.54, and the Abbe number is 55.9; and the refractive index of the fourth lens element 11 is 1.54, and the Abbe number is 55.9.

[0194] In this embodiment, the second lens 11 located on the object side of the lens 1 is designed to have the highest refractive index, which is conducive to achieving a better imaging effect.

[0195] In other examples, the lens 1 may include four plastic lenses 112 .

[0196] In this embodiment, the all-plastic lens design forms a 4P architecture, which can reduce the overall manufacturing process of the lens 1 and thus reduce production costs.

[0197] It should be noted that the present embodiment does not limit the number of lenses 11 in the lens 1. The 1G+3P architecture of the lens 1 in the embodiment shown in FIG2A is for illustration only. In other embodiments, the lens 1 may have other architectures and include other numbers of lenses 11.

[0198] For example, the lens 1 may include four lenses 11 , the first lens 11 and the second lens 11 close to the object side of the lens 1 are glass lenses 111 , and the remaining two lenses are plastic lenses 112 , forming a 2G+2P architecture, etc.

[0199] For another example, the lens 1 may include five lenses 11, the first lens 11 close to 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 close to the object side of the lens 1 are glass lenses 111, and the remaining three lenses are plastic lenses 112, forming a 2G+3P architecture, and so on.

[0200] In some other embodiments, when the lens 1 includes a glass lens 111 , the infrared filter 12 may also be disposed on both side surfaces of the glass lens 111 to filter light within the second wavelength range.

[0201] In some embodiments, the lens 1 may further include an aperture stop and a spacer ring.

[0202] The aperture stop can adjust the aperture and 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 on the object side of the lens 1. In other embodiments, the aperture stop can also be installed in other positions of the lens 1, and this embodiment of the present application is not strictly limited to this.

[0203] The spacer ring is disposed between two adjacent lenses 11 to support the two adjacent lenses 11 so as to ensure that the installation of each lens 11 in the lens 1 is stable.

[0204] Please refer to Figures 2A, 3A, and 3B. Figure 3A is a schematic diagram illustrating the structure of a single infrared filter 12 in the camera module 10 shown in Figure 2A in some embodiments. Figure 3B is a schematic diagram illustrating the thickness distribution of each layer of the infrared filter 12 shown in Figure 3A in some embodiments. It should be noted that for ease of illustration, the thickness of each layer in Figures 3A and 3B is exaggerated.

[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, with the multiple layers of first films 121 and the multiple layers of second films 122 being alternately arranged. 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, the first films 121 with a relatively high refractive index and the second films 122 with a relatively low refractive index are alternately arranged to enhance the infrared light filtering effect and the visible light transmission effect, thereby improving the imaging quality of the camera module 10. For example, the first films 121 may be TiO2, and the second films 122 may be SiO2.

[0207] For example, the thickness d1 of each first film 121 satisfies the following conditions: 1 nm ≤ d1 ≤ 130 nm, and the thickness d2 of each second film 122 satisfies the following conditions: 1 nm ≤ d2 ≤ 130 nm. In this embodiment, the thicknesses of the first and second films 121, 122 are set so that each first film 121 and each second film 122 can perform infrared filtering. Consequently, the combination of multiple first and second films 121, 122 can perform the filtering function of a single infrared filter 12.

[0208] For example, the thickness of each first film 121 may be, but is not limited to, 1 nm, 10 nm, 25 nm, 40 nm, 60 nm, 85 nm, 90 nm, 105 nm, 120 nm, 130 nm, or other values ​​between 1 nm and 130 nm. The thickness of each second film 122 may be, but is not limited to, 1 nm, 12 nm, 28 nm, 44 nm, 63 nm, 87 nm, 91 nm, 107 nm, 122 nm, 130 nm, or other values ​​between 1 nm and 130 nm.

[0209] If the thickness of the first film 121 is less than 1 nm or greater than 130 nm, the first film 121 will not be able to filter infrared light, thereby affecting the infrared filtering function of the individual infrared filter film 12. If the thickness of the second film 122 is less than 1 nm or greater than 130 nm, the second film 122 will not be able to filter infrared light, thereby affecting the infrared filtering function of the individual infrared filter film 12.

[0210] In the multilayer first film 121, some first films 121 may have a first thickness, while others may have a second thickness. First films 121 having the first thickness and first films 121 having the second thickness are alternately arranged. In the multilayer second film 122, some second films 122 may have the first thickness, while others may have the second thickness. Second films 122 having the first thickness and second films 122 having the second thickness are alternately arranged. The first thickness d3 satisfies the following: 1 nm ≤ d3 < 66 nm, and the second thickness d4 satisfies the following: 66 nm ≤ d4 ≤ 130 nm.

[0211] In this embodiment, by arranging a thicker first film 121 and a thinner first film 121 alternately, and arranging a thicker second film 122 and a thinner second film 122 alternately, it is beneficial to the process feasibility of coating the surface of the lens 11, thereby facilitating the alternating coating of the first film 121 and the second film 122 one by one.

[0212] It should be noted that the first film 121 having a first thickness and the first film 121 having a second thickness are alternately arranged. The first film 121 having the first thickness and the first film 121 having the second thickness may be alternately arranged one by one, or the first film 121 having the first thickness and the first film 121 having the second thickness may be alternately arranged one by two, or the first film 121 having the first thickness and the first film 121 having the second thickness may be alternately arranged two by one, or a combination of multiple alternating rules, as long as the arrangement rule of the multi-layer first film 121 conforms to the alternation of thick and thin.

[0213] Here, the first film 121 having the first thickness and the first film 121 having the second thickness are arranged alternately in a one-two arrangement, which means that one layer of the first film 121 having the first thickness and two layers of the first film 121 having the second thickness are arranged alternately. The first film 121 having the first thickness and the first film 121 having the second thickness are arranged alternately in a two-one arrangement, which means that two layers of the first film 121 having the first thickness and one layer of the first film 121 having the second thickness are arranged alternately. The same applies to other alternating patterns, which will not be further described.

[0214] Similarly, the second film 122 with the first thickness and the second film 122 with the second thickness are arranged alternately. The second film 122 with the first thickness and the second film 122 with the second thickness can be arranged alternately one by one, or the second film 122 with the first thickness and the second film 122 with the second thickness are arranged alternately one by two, or the second film 122 with the first thickness and the second film 122 with the second thickness are arranged alternately two by one, or a combination of multiple alternating rules, as long as the arrangement rule of the multi-layer second film 122 conforms to the alternation of thick and thin.

[0215] For example, as shown in FIG3B , in a layer of infrared filter film 12, the arrangement of the first films 121 includes alternating arrangements of first films 121 having a first thickness and first films 121 having a second thickness, and also includes alternating arrangements of first films 121 having a first thickness and first films 121 having a second thickness. The arrangement of the second films 122 includes alternating arrangements of second films 122 having a first thickness and second films 122 having a second thickness, and also includes alternating arrangements of second films 122 having a first thickness and second films 122 having a second thickness.

[0216] It should be noted that the number of layers and thickness distribution of the first film 121 and the second film 122 in the infrared filter film 12 shown in FIG. 3B are for illustration only and do not limit the number of layers and thickness distribution of the infrared filter film 12 in this application.

[0217] Exemplarily, the thickness of a single infrared filter 12 is less than or equal to 6 μm to prevent the infrared filter 12 from being too thick, which would cause the infrared filter 12 to exert excessive pulling force on the lens 11, thereby preventing the infrared filter 12 from affecting the surface shape of the lens 11. For example, the thickness of a single infrared filter 12 can be 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, or other values ​​less than 6 μm.

[0218] The thickness of each portion of the single infrared filter film 12 is the same, so that the filtering effect of each portion of the single infrared filter film 12 on light is consistent, which is beneficial to improving the stability of light filtering.

[0219] Among them, in the two infrared filter films 12 provided on both 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.

[0220] In this embodiment, the thickness difference between the two infrared filters 12 disposed on the two side surfaces of the same lens 11 is small, so that the difference in the pulling force of the two infrared filters 12 on the surface of the lens 11 on the two side surfaces is small. This is conducive to making the pulling forces of the two infrared filters 12 on the lens 11 offset each other, thereby reducing or even eliminating the impact of the coating on the two side surfaces of the lens 11 on the surface variation of the lens 11.

[0221] For example, in the two infrared filter films 12 disposed on both sides 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, 1.05, 1.1, 1.15, 1.2, or other values ​​between 1 and 1.2. For example, one infrared filter film 12 has a thickness of 3212 nm, and the total number of layers of the first film 121 and the second film 122 is 54; the other infrared filter film 12 has a thickness of 2886 nm, and the total number of layers of the first film 121 and the second film 122 is 36.

[0222] Please refer to Figures 2A, 4A, and 4B. Figure 4A is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in other embodiments; Figure 4B is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in still other embodiments. It should be noted that the camera module 10 in the embodiments shown in Figures 4A and 4B may include some of the technical features of the camera module 10 in the embodiment shown in Figure 2A. The following mainly describes the differences between the two, and the common features are not repeated here.

[0223] In some embodiments, the plurality of lenses 11 may include at least one plastic lens 112 , and the infrared filter 12 is disposed on both side surfaces of the plastic lens 112 .

[0224] In this embodiment, the plastic lens 112 is easy to manufacture, which helps to reduce the difficulty of manufacturing the lens 1. By providing infrared filter films 12 on both side surfaces of the plastic lens 112, the pulling force of the infrared filter films 12 on both side surfaces of the plastic lens 112 can be at least partially offset, thereby reducing or even eliminating the surface shape variation caused by surface coating of the plastic lens 112.

[0225] 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 .

[0226] In this embodiment, the plastic lens 112, which is provided with the infrared filter 12, is not positioned as the first lens on the object side of the lens 1. This prevents excessively large incident angles of light on the image side of the first lens 11, which could cause spectral transmittance drift across different fields of view and thus increase the risk of color shading. Furthermore, if the plastic lens 112, which is provided with the infrared filter 12, were positioned as the first lens on the object side of the lens 1, it would cause the ID side of the lens 1 to turn red, thereby creating an ID risk. Furthermore, the fact that the first lens 11 of the lens 1 is a plastic lens 112 would not be conducive to the lightweight design of the lens 1.

[0227] Among them, the number of lenses 1 is at least 4, and the infrared filter membrane 12 is set on both side surfaces of the first lens 11 close to the image side of the lens 1 (see Figure 2A), or the infrared filter membrane 12 is set on both side surfaces of the second lens 11 close to the image side of the lens 1 (see Figure 4A), or the infrared filter membrane 12 is set on both side surfaces of the third lens 11 close to the image side of the lens 1 (see Figure 4B).

[0228] In this embodiment, according to the principles of geometric optics, the incident angles of the main light on the object side and image side of the first, second and third lenses 11 located on the image side of the lens 1 are 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 located on the image side of the lens 1 is also small, thereby reducing the offset of the infrared filter film 12 in different fields of view, thereby reducing the risk of color cast, and further reducing the drop value of the color shading curve of the infrared filter film 12. While reducing the pressure of color correction, the color of the image formed by the camera module 10 can be made more natural and realistic.

[0229] Referring again to Figures 2A, 4A, and 4B, in some embodiments, the plurality of lenses 11 may include a plastic lens 112 doped with a color masterbatch. Plastic lens 112 doped with a color masterbatch is configured to filter light within a first wavelength range. In the embodiments shown in Figures 2A, 4A, and 4B, the lens 11 with hatching and blocks is plastic lens 112 doped with a color masterbatch.

[0230] In this embodiment, a color masterbatch is doped into a piece of plastic lens 112, so that the plastic lens 112 doped with the color masterbatch can filter part of the infrared rays, that is, it can filter the light in the first wavelength range, and the plastic lens 112 doped with the color masterbatch can also absorb ultraviolet rays or part of the blue light band, thereby improving the risk of false color caused by canceling the filter of the camera module 10.

[0231] It should be noted that masterbatch is a mixture of resin and a large amount of pigment (up to 50%) or dye to form a high-concentration color.

[0232] Exemplarily, the plastic lens 112 doped with color masterbatch can be located on the image side of the first lens 11 close to the object side of the lens 1 to avoid the plastic lens 112 doped with color masterbatch affecting the appearance of the camera module 10 due to its own color.

[0233] The ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens 112 doped with the color masterbatch is within a range of 1 to 1.15, so that the difference in effective thickness at various locations of the plastic lens 112 doped with the color masterbatch is small, thereby improving the consistency of the light filtering effect at various locations of the plastic lens 112 doped with the color masterbatch. For example, the ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens 112 doped with the color masterbatch can be 1, 1.03, 1.06, 1.09, 1.12, 1.15, or other values ​​between 1 and 1.15.

[0234] It should be noted that the effective thickness of the plastic lens 112 doped with the color masterbatch refers to the thickness of the portion of the plastic lens 112 doped with the color masterbatch for transmitting light.

[0235] The number of lenses 1 may be at least 4, and the plastic lens 112 doped with the color masterbatch may be the second lens 11 or the third lens 11 on the object side of the lens 1 .

[0236] In this embodiment, in the design of the lens 1, the effective thickness difference of the second lens 11 or the third lens 11 close to the object side of the lens 1 is usually small. By designing the second lens 11 or the third lens 11 close to the object side of the lens 1 as a plastic lens 112 and doping it with a masterbatch, the consistency of the filtering effect of the plastic lens 112 doped with the masterbatch on light can be improved.

[0237] In some examples (see FIG. 4A ), the plastic lens 112 doped with the color masterbatch and the plastic lens 112 with the infrared filter films 12 disposed on both sides thereof are the same plastic lens 112 .

[0238] 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 the two side surfaces of the plastic lens 112 doped with the color masterbatch.

[0239] In other examples (see FIG. 2A and FIG. 4B ), the plastic lens 112 doped with the color masterbatch and the plastic lens 112 with the infrared filter films 12 disposed on both sides thereof are different plastic lenses 112 .

[0240] In this embodiment, the plastic lens 112 with infrared filter films 12 on both sides can be located on the image side or the object side of the plastic lens 112 doped with the color masterbatch, thereby improving the flexibility of the relative position design of the plastic lens 112 with infrared filter films 12 on both sides and the plastic lens 112 doped with the color masterbatch, and can be flexibly designed according to the arrangement spacing of each lens 11 in the lens 1 and the actual application requirements.

[0241] Please refer to Figures 2A, 5A, and 5B. Figure 5A is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in further embodiments; Figure 5B is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in further embodiments. It should be noted that the camera module 10 in the embodiments shown in Figures 5A and 5B may include some of the technical features of the camera module 10 in the embodiments shown in Figures 2A, 4A, and 4B. The following mainly describes the differences between the two, and the common features between the two are not repeated here.

[0242] In some embodiments, the infrared filter films 12 may be disposed on both side surfaces of the plurality of plastic lenses 112 .

[0243] In this embodiment, the infrared filter films 12 are disposed on both side surfaces of multiple plastic lenses 112, which can reduce the thickness of a single infrared filter film 12, thereby reducing the thickness of the infrared filter films 12 on both side surfaces of each plastic lens 112. This further reduces the pulling force exerted on the surface of the plastic lens 112 when the first infrared filter film 12 is coated during the process of coating the infrared filter films 12 on both side surfaces of the plastic lens 112, thereby reducing the surface variation of the plastic lens 112 subjected to the infrared filter film 12 coating.

[0244] For example, the lens 1 may include four lenses 11, pointing from the object side of the lens 1 to the image side of the lens 1, and the infrared filter film 12 may be set on both side surfaces of the third lens 11 and both side surfaces of the fourth lens 11 (see Figure 5A); the infrared filter film 12 may also be set on both side surfaces of the second lens 11, both side surfaces of the third lens 11 and both side surfaces of the fourth lens 11 (see Figure 5A), etc.

[0245] Please refer to FIG. 6A , which is a schematic diagram illustrating light passing through the lens 1 in the camera module 10 shown in FIG. 4A at different viewing fields.

[0246] In some embodiments, the lens 1 may include four lenses 11, which are, from the object side of the lens 1 to the image side of the lens 1, a glass lens 111, a plastic lens 112, a plastic lens 112 doped with a color masterbatch, a plastic lens 112, and a photosensitive element 2. Infrared filters 12 are provided on both sides of the plastic lens 112 doped with a color masterbatch.

[0247] Among them, the different beams of light converging to the photosensitive element 2 from the center of the photosensitive element 2 to the edge of the photosensitive element 2 are light of 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 respectively.

[0248] The infrared filter film 12 disposed on the object side of the plastic lens 112 doped with the color masterbatch has a thickness of 3212 nm, and the infrared filter film 12 disposed on the image side of the plastic lens 112 doped with the color masterbatch has a thickness of 2886 nm. For information on the film layers of the infrared filter film 12 disposed on both sides of the plastic lens 112 doped with the color masterbatch, please refer to Table 1a and Table 1b. Table 1a provides information on the film layers of the infrared filter film 12 disposed on the object side of the plastic lens 112 doped with the color masterbatch, while Table 1b provides information on the film layers of the infrared filter film 12 disposed on the image side of the plastic lens 112 doped with the color masterbatch. The layer number indicates the direction from the surface of the lens 11 pointing away from the lens 11. The units of physical thickness and optical thickness are both in nm. FWOT is the equivalent physical thickness in the optical thin film design software OptiLayer, and QWOT is the equivalent optical thickness in the optical thin film design software OptiLayer. The materials are the first film (TiO2) and the second film (SiO2).

[0249] Table 1a

[0250] Table 1b

[0251] Please refer to Figures 6B, 6C and 6D in combination. Figure 6B is a schematic diagram of the light filtering by the plastic lens 112 doped with color masterbatch in the camera module 10 shown in Figure 6A; Figure 6C is a schematic diagram of the light filtering by the infrared filter membrane 12 arranged on the object side of the plastic lens 112 doped with color masterbatch in the camera module 10 shown in Figure 6A; Figure 6D is a schematic diagram of the light filtering by the infrared filter membrane 12 arranged on the image side of the plastic lens 112 doped with color masterbatch in the camera module 10 shown in Figure 6B.

[0252] Among them, the plastic lens doped with color masterbatch can filter light from 680nm to 750nm, the infrared filter membrane arranged on the object side of the plastic lens doped with color masterbatch can filter light from 750nm to 1050nm, and the infrared filter membrane arranged on the image side of the plastic lens doped with color masterbatch can filter light from 850nm to 1150nm.

[0253] Figure 6C shows a simulated diagram of the infrared filter membrane corresponding to Table 1a filtering light, while Figure 6D shows a simulated diagram of the infrared filter membrane corresponding to Table 1b filtering light. In Figures 6C and 6D, Ta0° represents light perpendicular to the lens, corresponding to the dark lines, and Ta30° represents light at a 30° angle to the lens surface normal, corresponding to the light lines. Figures 6C and 6D demonstrate that the infrared filter membrane exhibits excellent infrared filtering effectiveness for light at varying incident angles.

[0254] Please refer to Figure 6E and Figure 6F in combination. Figure 6E is a schematic diagram of the two infrared filter films 12 in the camera module 10 shown in Figure 6A filtering light together; Figure 6F is a schematic diagram of the transmittance offset of the lens 1 in the camera module 10 shown in Figure 6A for light in different fields of view.

[0255] In FIG6E , Ta0° represents light perpendicular to the surface of the lens, corresponding to the dark lines in the figure, and Ta30° represents light at an angle of 30° to the normal of the surface of the lens, corresponding to the light lines in the figure.

[0256] Among them, the multiple lines in Figure 6F represent the transmittance of the lens for light in different fields of view, corresponding to the visible light wavelength range, and the transmittance from high to low corresponds to the light in 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.

[0257] As can be seen from FIG6E , the two infrared filter films can jointly filter light from 750 nm to 1150 nm, and can achieve good infrared filtering effects for light at different incident angles.

[0258] As can be seen from FIG6F , the lens 1 shown in the embodiment of FIG6A can filter light rays from 680 nm to 1150 nm for light rays in different fields of view, and has a good cutoff depth effect for light rays from 680 nm to 1150 nm.

[0259] Please refer to Figure 6F, Figure 7A and Figure 7B in combination. Figure 7A is a schematic diagram of light passing through the lens 1 in the camera module 10 in the prior art under different fields of view in some embodiments; Figure 7B is a schematic diagram of the transmittance offset of the lens 1 in the camera module 10 shown in Figure 7A for light in different fields of view.

[0260] In one prior art, a lens 1 includes four lenses 11, which are arranged along the object side of the lens 1 and point toward the image side of the lens 1. The camera module 10 includes a glass lens 111, a plastic lens 112, a plastic lens 112, a plastic lens 112, a filter 200, and a photosensitive element 2. The filter 200 can filter light ranging from 680 nm to 1150 nm, and the dimensions of each lens 11 in the lens 1 are the same as those in the embodiment shown in FIG. 6A .

[0261] Among them, the different beams of light converging to the photosensitive element 2 from the center of the photosensitive element 2 to the edge of the photosensitive element 2 are light of 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 respectively.

[0262] Among them, the multiple lines in Figure 7B represent the transmittance of lens 1 for light in different fields of view, corresponding to the visible light wavelength range, and the transmittance from high to low corresponds to the light in 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.

[0263] By comparing Figure 6F and Figure 7B, it can be seen that the lens 1 shown in the embodiment of Figure 6A can filter light of the same wavelength as the prior art shown in Figure 7A, and can achieve infrared filtering for the light of each field of view. Moreover, the difference in the transmittance of visible light in each field of view of the lens 1 shown in the embodiment of Figure 6A is smaller, achieving a better transmittance effect for visible light. Therefore, the lens 1 provided in the embodiment of the present application eliminates the filter 200 in the prior art, and realizes the lightweight 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 visible light in the light of each field of view, thereby achieving better imaging.

[0264] Please refer to Figures 8A to 8C in combination, Figure 8A is a schematic diagram of the transmittance ratio of red light and green light of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for different fields of view when there is no light source; Figure 8B is a schematic diagram of the transmittance ratio of blue light and green light of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for different fields of view when there is no light source; Figure 8C is a schematic diagram of the imaging color shadow comparison of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for light in different fields of view when there is no light source.

[0265] In Figures 8A to 8C , R / G represents the ratio of red light transmittance to green light transmittance, B / G represents the ratio of blue light transmittance to green light transmittance, and Shading represents color shading. The horizontal axes in Figures 8A to 8C represent the field of view, specifically 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F fields of view. In Figures 8A to 8C , the light-colored curves correspond to the embodiment of Figure 6A , and the dark-colored curves correspond to the prior art of Figure 7A .

[0266] Please refer to Table 2a, which shows the weighted values ​​for R / G, B / G, and shading across multiple fields of view in Figures 8A to 8C. Figures 8A to 8C, as well as Table 2a, show that compared to the prior art shown in Figure 7A, the embodiment shown in Figure 6A shows a significantly smaller drop in the ratio of red and green transmittance across different fields of view for Lens 1, thus reducing its impact on RI. Furthermore, compared to the prior art shown in Figure 7A, the embodiment shown in Figure 6A shows a significantly smaller drop in shading across different fields of view for Lens 1, thus reducing the impact of color cast.

[0267] Table 2a

[0268] Please refer to Figures 9A to 9C in combination. Figure 9A is a schematic diagram of the transmittance ratio of red light and green light of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for different fields of view when illuminated by a light source; Figure 9B is a schematic diagram of the transmittance ratio of blue light and green light of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for different fields of view when illuminated by a light source; Figure 9C is a schematic diagram of the imaging color and shadow comparison of the camera module 10 in the embodiment shown in Figure 6A and the prior art shown in Figure 7A for light in different fields of view when illuminated by a light source.

[0269] The light source is a D65 light source, which is a standard artificial light source with a color temperature of 6500K, belonging to neutral white light. The D65 light source is used to illuminate the camera module 10 shown in the embodiment of FIG6A and the camera module 10 of the prior art shown in FIG7A .

[0270] In Figures 9A to 9C , R / G represents the ratio of red light transmittance to green light transmittance, B / G represents the ratio of blue light transmittance to green light transmittance, and Shading represents color shading. The horizontal axes in Figures 9A to 9C represent the field of view, specifically 0F, 0.1F, 0.2F, 0.3F, 0.4F, 0.5F, 0.6F, 0.7F, 0.8F, 0.9F, and 1F fields of view. In Figures 9A to 9C , the light-colored curves correspond to the embodiment of Figure 6A , and the dark-colored curves correspond to the prior art of Figure 7A .

[0271] Please refer to Table 2b, which shows the weighted values ​​obtained by weighting the R / G, B / G, and shading values ​​corresponding to multiple fields of view in Figures 9A to 9C. As can be seen from Figures 9A to 9C and Table 2b, compared to the prior art Figure 7A, the embodiment of Figure 6A shows a significantly smaller drop in the ratio of red and green light transmittance across different fields of view for Lens 1, thereby reducing the impact on RI. Furthermore, compared to the prior art Figure 7A, the embodiment of Figure 6A shows a significantly smaller drop in shading across different fields of view for Lens 1, thereby reducing the impact of color cast.

[0272] Table 2b

[0273] By comparing the two scenarios of no light source and light source, the embodiment of FIG6A is compared with the prior art of FIG7A. Under 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, after removing the filter, the camera module 10 of the embodiment of FIG6A of the present application, by doping the color masterbatch in the plastic lens and setting an infrared filter film on both sides of the plastic lens, not only reduces the back focus distance of the lens 1 to reduce the overall thickness of the camera module 10, but also achieves a better imaging effect. For example, the ratio of the transmittance of red light to the transmittance of green light of lens 1 under different fields of view is improved, thereby reducing the impact on RI. For another example, the drop value of color shading under different fields of view is improved, thereby reducing the impact of color cast.

[0274] Please refer to FIG. 10 , which is a schematic structural diagram of the lens 1 and the photosensitive element 2 in the camera module 10 shown in FIG. 4A in some embodiments.

[0275] 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. 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. The first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, and the third lens L3 is a plastic lens 112. The third lens L3 is doped with a color masterbatch, and an infrared filter 12 is provided on both the object side and the image side of the third lens L3. The fourth lens L4 is a plastic lens 112.

[0276] Please refer to Tables 3a and 3b. Table 3a lists the radius of curvature (R), spacing (D), refractive index (Nd), and Abbe number of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 10. The spacing includes the thickness of the structure itself and the spacing between structures. Table 3b lists the aspheric coefficients of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 10.

[0277] Table 3a

[0278] Table 3b

[0279] Each lens 11 in Table 3a is an aspheric surface, which can be defined by, but not limited to, the following aspheric curve equation:

[0280] Where z is the relative distance between a point r from the optical axis on the aspheric surface and the tangent plane tangent to the optical axis of the aspheric surface; r is the perpendicular distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the i-th order aspheric coefficient, which can be found in Table 3b.

[0281] Please refer to Table 3c, which lists basic parameters and simulation result parameters of the camera module 10 shown in Figure 10 in one possible embodiment. In Table 3c, 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 focus 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.

[0282] Table 3c

[0283] In this embodiment, the ratio of lens 1's focal length (EFL) to its total optical length (TTL) is EFL / TTL = 0.98; and the ratio of lens 1's back focal length (FBL) to its total optical length (TTL) is FBL / TTL = 0.13. Simulation results show that lens 1 has an RI value greater than 0.2 and distortion less than 2%, ensuring that the image is free of noticeable color cast and distortion.

[0284] Please refer to FIG. 11 , which is a schematic structural diagram of the lens 1 and the photosensitive element 2 in the camera module 10 shown in FIG. 4A in other embodiments.

[0285] 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. 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. The first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, and the third lens L3 is a plastic lens 112. The third lens L3 is doped with a color masterbatch, and an infrared filter 12 is provided on both the object side and the image side of the third lens L3. The fourth lens L4 is a plastic lens 112.

[0286] Please refer to Tables 4a and 4b. Table 4a lists the radius of curvature (R), spacing (D), refractive index (Nd), and Abbe number of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 11. The spacing includes the thickness of the structure itself and the spacing between structures. Table 4b lists the aspheric coefficients of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 11.

[0287] Table 4a

[0288] Table 4b

[0289] Each lens 11 in Table 4a is an aspheric surface, which can be defined by, but not limited to, the following aspheric curve equation:

[0290] Where z is the relative distance between a point r from the optical axis on the aspheric surface and the tangent plane tangent to the optical axis of the aspheric surface; r is the perpendicular distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the i-th order aspheric coefficient, which can be found in Table 4b.

[0291] Please refer to Table 4c, which shows basic parameters and simulation result parameters of the camera module 10 shown in Figure 11 in one possible embodiment. 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 focus 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.

[0292] Table 4c

[0293] In this embodiment, the ratio of the focal length (EFL) of lens 1 to its total optical length (TTL) is EFL / TTL = 0.98; and the ratio of the back focal length (FBL) of lens 1 to its total optical length (TTL) is FBL / TTL = 0.11. Simulation results show that the RI value of lens 1 is greater than 0.2, and the distortion is less than 2%, ensuring that the image is free of noticeable color cast and distortion.

[0294] Please refer to FIG. 12 , which is a schematic structural diagram of the lens 1 and the photosensitive element 2 in the camera module 10 shown in FIG. 4A in some further embodiments.

[0295] 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. 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. The first lens L1 is a glass lens 111, the second lens L2 is a plastic lens 112, and the third lens L3 is a plastic lens 112. The third lens L3 is doped with a color masterbatch, and an infrared filter 12 is provided on both the object side and the image side of the third lens L3. The fourth lens L4 is a plastic lens 112.

[0296] Please refer to Table 5a and Table 5b. Table 5a lists the radius of curvature (R), spacing (D), refractive index (Nd), and Abbe number of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 12. The spacing includes the thickness of the structure itself and the spacing between structures. Table 5b lists the aspheric coefficients of each lens element 11 in a possible embodiment of the camera module 10 shown in Figure 12.

[0297] Table 5a

[0298] Table 5b

[0299] Each lens 11 in Table 5a is an aspheric surface, which can be defined by, but not limited to, the following aspheric curve equation:

[0300] Where z is the relative distance between a point r from the optical axis on the aspheric surface and the tangent plane tangent to the optical axis of the aspheric surface; r is the perpendicular distance between the point on the aspheric curve and the optical axis; c is the curvature; k is the conic coefficient, which is 0; αi is the i-th order aspheric coefficient, which can be found in Table 5b.

[0301] Please refer to Table 5c, which shows basic parameters and simulation result parameters of the camera module 10 shown in FIG12 in one possible embodiment. 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 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.

[0302] Table 5c

[0303] In this embodiment, the ratio of the focal length (EFL) of lens 1 to its total optical length (TTL) is EFL / TTL = 0.85; the ratio of the back focal length (FBL) of lens 1 to its total optical length (TTL) is FBL / TTL = 0.19. Simulation results show that the RI value of lens 1 is greater than 0.2, and the distortion is less than 2%, ensuring that the image is free of noticeable color cast and distortion.

[0304] Please refer to Figures 13A and 13B . Figure 13A is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in further embodiments; Figure 13B is a schematic diagram of the structure of the camera module 10 in the electronic device 100 shown in Figure 1A in further embodiments. It should be noted that the camera module 10 in the embodiments shown in Figures 13A and 13B may include some of the technical features of the camera module 10 in the embodiments shown in Figures 2A, 4A, 4B, 5A, and 5B. The following mainly describes the differences between the two, and the common features are not repeated here.

[0305] In some embodiments, the plurality of 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 within a first wavelength range.

[0306] In this embodiment, a glass lens 111 made of blue glass is combined with at least two infrared filters 12 to filter light within the combined first and second wavelength ranges, thereby achieving the infrared filtering function of lens 1. This reduces or avoids image noise in low-light conditions, improves the reproduction of imaging details, and makes the resulting image more consistent with the perception of the human eye. Because the infrared filtering function is achieved through lens 1, there is no need to install a traditional filter between lens 1 and photosensitive element 2. This increases the freedom of back focus design of lens 1, thereby compressing the back focus space of lens 1, reducing the total optical length (TTL), and further reducing the overall thickness of camera module 10, thereby achieving a lightweight and thin design of camera module 10. This facilitates the application of camera module 10 in electronic device 100 and thus achieving a lightweight and thin design of electronic device 100.

[0307] For example, the glass lens 111 made of blue glass material can filter the light of 680nm to 750nm, and all the infrared filter films 12 can filter the light of 750nm to 1150nm, thereby enabling the lens 1 to filter the light of 680nm to 1150nm.

[0308] Among them, the blue glass material can be BK7 blue glass, which has a refractive index of 1.5168 and an Abbe number of 64.17.

[0309] In some examples (see FIG. 13A ), the glass lens 111 made of blue glass material may be the first lens 11 close to the object side of the lens 1 .

[0310] In this embodiment, since the first lens 11 close to the object side of the lens 1 can be spherical, the glass lens 111 made of blue glass material can be prepared by a grinding process, thereby reducing the difficulty of the preparation process of the glass lens 111 made of blue glass material.

[0311] In other examples (see FIG. 13B ), the glass lens 111 made of blue glass material may be the second lens 11 close to the object side of the lens 1 .

[0312] In this embodiment, the first lens 11 close to the object side of the lens 1 can be a glass lens 111, and the second lens 11 can be a glass lens 111 made of blue glass material. The use of a structure with two glass lenses 111 is conducive to compressing the thickness of the lens 1, thereby facilitating the realization of a lightweight and thin design of the lens 1.

[0313] Among them, the glass lens 111 made of blue glass material can also be prepared by a low-temperature molding process. The blue glass material is molded into the first lens 11 or the second lens 11 close to the object side of the lens 1 through the molding process. The low-temperature molding process can avoid the high temperature causing the ion components in the blue glass material to volatilize and reduce the infrared cutting effect.

[0314] In some other embodiments, the lens 1 in the camera module 10 can also be combined with a coating on a transparent cover plate to achieve an infrared filtering function, thereby eliminating the filter in the camera module 10, reducing the back focal length of the lens 1, and further reducing the overall thickness of the camera module 10, achieving a lightweight design. The following describes an embodiment of the present application in which the lens 1 is combined with a coating on a transparent cover plate to achieve an infrared filtering function.

[0315] Please refer to Figures 14A and 14B in conjunction. Figure 14A is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A, taken along line AA in some embodiments; Figure 14B is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A, taken along line AA in other embodiments. It should be noted that the camera module 10 of the embodiments shown in Figures 14A and 14B may include some of the technical features of the camera module 10 of the embodiments shown in Figures 2A, 4A, 4B, 5A, 5B, 13A, and 13B. The following mainly describes the differences between the two, and the common content between the two is not repeated here.

[0316] In some embodiments, 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 transparent cover plate 201 facing the lens 1 and corresponding to the transparent area 203 of the screen 20 .

[0317] In this embodiment, the infrared filter film 12 arranged on the transparent cover plate 201 and the infrared filter film 12 arranged on the two side surfaces of at least one lens 11 in the lens 1 jointly filter the light in the second wavelength range, and the plastic lens 112 doped with the masterbatch material in the lens 1 or the glass lens 111 made of blue glass material in the lens 1 filters the light in the first wavelength range, thereby realizing that the infrared filter film 12 arranged on the transparent cover plate 201 cooperates with the lens 1 to jointly realize the infrared filtering function.

[0318] In addition, in this embodiment, since the infrared filter film 12 arranged on the transparent cover 201 can filter part of the light within the second wavelength range, the total thickness of the infrared filter film 12 arranged in the lens 1 can be reduced, thereby reducing the thickness of a single infrared filter film 12, and then the surface pulling force received by the lens 11 with the infrared filter films 12 arranged on both sides of the surface is reduced, which is beneficial to reducing the risk of surface variation of the lens 11 with the infrared filter films 12 arranged on both sides of the surface.

[0319] For example, the plastic lens 112 doped with a masterbatch material in the lens 1 or the glass lens 111 made of blue glass material in the lens 1 achieves filtering of light in the range of 680 nm to 750 nm, the infrared filter film 12 arranged on the transparent cover 201 achieves filtering of light in the range of 750 nm to 950 nm, and the infrared filter films 12 arranged on both side surfaces of at least one lens 11 in the lens 1 jointly achieve filtering of light in the range of 850 nm to 1150 nm, thereby enabling the infrared filter film 12 arranged on the transparent cover 201 to cooperate with the lens 1 to jointly achieve filtering of light in the range of 680 nm to 1150 nm.

[0320] The infrared filter film 12 disposed on the transparent cover plate 201 may have the same structure as the infrared filter film 12 disposed on both side surfaces of the lens 11 in the lens 1 in the aforementioned embodiment.

[0321] Please refer to Figures 15A and 15B . Figure 15A is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A taken along line AA in further embodiments; Figure 15B is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A taken along line AA in further embodiments. It should be noted that the camera module 10 of the embodiments shown in Figures 15A and 15B may include some of the technical features of the camera module 10 of the embodiments shown in Figures 14A and 14B . The following mainly describes the differences between the two, and the common features are not repeated here.

[0322] In some embodiments (see FIG. 15A ), the lens 1 may include a plastic lens 112 doped with a color masterbatch and configured to filter light within a first wavelength range. The electronic device 100 may include an infrared filter 12 disposed on the surface of the transparent cover 201 facing the lens 1 and corresponding to the light-transmitting area 203 of the screen 20. The infrared filter 12 disposed on the surface of the transparent cover 201 facing the lens 1 is configured to filter light within a second wavelength range.

[0323] In this embodiment, the infrared filtering function is achieved by providing an infrared filter membrane 12 on the surface of the transparent cover 201 facing the lens 1 in cooperation with the plastic lens 112 doped with masterbatch in the lens 1, thereby eliminating the need to provide a filter in the camera module 10, which is beneficial for compressing the back focal length of the lens 1, thereby reducing the thickness of the camera module 10, and facilitating a lightweight design.

[0324] For example, the plastic lens 112 doped with the masterbatch material in the lens 1 filters the light of 680nm to 750nm, and the infrared filter film 12 arranged on the transparent cover 201 filters the light of 750nm to 1150nm, so that the infrared filter film 12 arranged on the transparent cover 201 cooperates with the lens 1 to filter the light of 680nm to 1150nm.

[0325] In other embodiments (see 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 one side surface of the glass lens 111 is provided with an infrared filter film 12. The infrared filter film 12 provided on the surface of the glass lens 111 and the infrared filter film 12 provided on the surface of the transparent cover plate 201 facing the lens 1 are jointly used to filter light in the second wavelength range.

[0326] In this embodiment, due to the high hardness of glass, an infrared filter 12 is provided on one side of the glass lens 111, resulting in minimal or no deformation of the surface shape of the glass lens 111. The infrared filter 12 provided on the surface of the transparent cover 201 facing the lens 1, the plastic lens 112 doped with a color masterbatch in the lens 1, and the infrared filter 12 provided on the surface of the glass lens 111 collectively achieve an infrared filtering function. This eliminates the need for a filter in the camera module 10, facilitating a reduction in the back focal length of the lens 1 and, consequently, the thickness of the camera module 10, facilitating a lightweight and thin design.

[0327] For example, the plastic lens 112 doped with the masterbatch material in the lens 1 filters the light of 680nm to 750nm, the infrared filter film 12 arranged on the transparent cover 201 filters the light of 750nm to 950nm, and the infrared filter film 12 arranged on the surface of the glass lens 111 in the lens 1 filters the light of 850nm to 1150nm, so that the infrared filter film 12 arranged on the transparent cover 201 cooperates with the lens 1 to filter the light of 680nm to 1150nm.

[0328] Please refer to Figures 16A and 16B . Figure 16A is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A taken along line AA in further embodiments; Figure 16B is a schematic diagram of the partial structure of the electronic device 100 shown in Figure 1A taken along line AA in further embodiments. It should be noted that the camera module 10 of the embodiments shown in Figures 16A and 16B may include some of the technical features of the camera module 10 of the embodiments shown in Figures 15A and 15B . The following mainly describes the differences between the two, and the common features between the two are not repeated here.

[0329] In some embodiments, the lens 1 may include a glass lens 111 made of blue glass material, for filtering light within a first wavelength range.

[0330] In some examples (see FIG. 16A ), the infrared filter film 12 disposed on the surface of the transparent cover 201 facing the lens 1 is used to filter light within a second wavelength range.

[0331] In this embodiment, the infrared filtering function is achieved by providing an infrared filter membrane 12 on the surface of the transparent cover plate 201 facing the lens 1 in cooperation with the glass lens 111 made of blue glass material in the lens 1, thereby eliminating the need to provide a filter in the camera module 10, which is beneficial for compressing the back focal length of the lens 1, thereby reducing the thickness of the camera module 10, and facilitating a lightweight design.

[0332] For example, the glass lens 111 made of blue glass material in the lens 1 filters light from 680nm to 750nm, and the infrared filter membrane 12 arranged on the transparent cover 201 filters light from 750nm to 1150nm, so that the infrared filter membrane 12 arranged on the transparent cover 201 cooperates with the lens 1 to filter light from 680nm to 1150nm.

[0333] In other examples (see FIG. 16B ), the infrared filter 12 disposed on the surface of the glass lens 111 and the infrared filter 12 disposed on the surface of the transparent cover 201 facing the lens 1 are used together to filter light in the second wavelength range.

[0334] In this embodiment, the infrared filtering function is achieved by the infrared filter membrane 12 arranged on the surface of the transparent cover 201 facing the lens 1, the glass lens 111 made of blue glass material in the lens 1, and the infrared filter membrane 12 arranged on the surface of the glass lens 111. As a result, there is no need to set a filter in the camera module 10, which is beneficial to compressing the back focal length of the lens 1, thereby reducing the thickness of the camera module 10, and facilitating a lightweight design.

[0335] For example, the glass lens 111 made of blue glass material in the lens 1 filters light from 680nm to 750nm, the infrared filter membrane 12 arranged on the transparent cover 201 filters light from 750nm to 950nm, and the infrared filter membrane 12 arranged on the surface of the glass lens 111 in the lens 1 filters light from 850nm to 1150nm, so that the infrared filter membrane 12 arranged on the transparent cover 201 cooperates with the lens 1 to filter light from 680nm to 1150nm.

[0336] The glass lens 111 with the infrared filter 12 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 .

[0337] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0338] It should be noted that all the above drawings are for illustrative purposes only and do not represent the actual size of the product. Furthermore, the dimensional ratios between the components in the drawings are not intended to limit the actual product of the present application.

[0339] The above are only some of the embodiments and implementations of this application. The scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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 with wavelengths in the range of 700 nm to 1000 nm. 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. The infrared filter films (12) are respectively disposed 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, 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.

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 alternately arranged 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, wherein 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, characterized in that, 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 alternately arranged. 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 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.

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) disposed 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 in 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, wherein The multiple lenses (11) include one 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, and the plastic lens (112) doped with the 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, characterized in that, The ratio of the maximum effective thickness to the minimum effective thickness of the plastic lens (112) doped with the 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 the 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 the 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), the one glass lens (111) and the 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, and 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, wherein, 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, wherein 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) to enclose 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) to enclose 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 in a 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 700nm to 1000nm.

26. An electronic device (100), characterized in that, It includes a camera module (10), a screen (20), a back cover (30), and at least two infrared filter films (12); The screen (20) is installed on the back cover (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 provided 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 provided 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 first films (121) and multiple second films (122). The multiple first films (121) and the multiple second films (122) are alternately arranged one by one. Wherein, the refractive index of each first film (121) is greater than or equal to 2, and the refractive index of each second film (122) is less than 2.

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

30. The electronic device (100) according to claim 29, characterized in that, Some of the multiple first films (121) have a first thickness, and the other part 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 alternately arranged; Some of the second films (122) among the multiple second films (122) have a first thickness, and another 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) close to 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) close to the object side of the lens 1.

Images