A lens module, a camera module and an electronic device

Abstract

The application discloses a lens module, a camera module and an electronic device. The lens module comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a light adjusting piece. Light incident from an object side is incident on the light adjusting piece through the first lens, is deflected and emitted through the light adjusting piece, is incident on the second lens, the third lens, the fourth lens and the fifth lens, and is emitted to an image side to form an image. The optical axes of the second lens, the third lens, the fourth lens and the fifth lens are perpendicular to the optical axis of the first lens. The lens module satisfies the following formulae: 25 < f1 < 35, wherein f1 represents the focal length of the first lens; 5 < f2 < 10, wherein f2 represents the focal length of the second lens; f / (F*K11) < 1.65, wherein K11 represents the effective aperture of the object plane of the fourth lens, F represents the aperture of the lens module, and f represents the focal length of the lens module.

Description

Technical Field

[0001] This application belongs to the technical field of optoelectronic technology, and in particular relates to a lens module, a camera module and an electronic device. Background Technology

[0002] Periscope telephoto lenses are a common type of lens used by mobile phone manufacturers. The lens module is placed horizontally on the inner wall of the mobile phone casing, and light is deflected by the dimming component and enters the lens module to form an image on the imaging chip.

[0003] Periscope telephoto lenses for mobile phones generally present a contradiction between satisfying a large aperture and meeting the thickness requirements of the phone. If the optical axis of the periscope telephoto lens is set along the length of the phone casing, then the aperture of the periscope telephoto lens will inevitably affect the thickness of the phone. If the thickness of the phone is to be reduced, the aperture size of the periscope telephoto lens must be compressed. If a large aperture is required, then the aperture of the lens module placed horizontally on the inner wall of the phone casing will also be very large. Generally speaking, people are more concerned about the thickness of the phone casing than the thickness of the lens cover. Therefore, a portion of the lens can be installed in the cavity inside the camera cover. Thus, the local aperture of the lens assembly placed horizontally on the inner wall of the phone casing needs to be within a small aperture range. However, the aperture of lens assemblies on the market is generally large. Summary of the Invention

[0004] The embodiments of this application provide a lens module, a camera module, and an electronic device. By adding a dimming component to the lens module and matching the parameters of each lens, the aperture of the local lens module along the length direction is reduced while still meeting the requirements of a large aperture. This ensures that the aperture of the lens module placed horizontally on the inner wall of the mobile phone casing is small, and at the same time, the length of the lens module is also reduced.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to a first aspect of the embodiments of this application, a lens module is provided, the lens module including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a dimming element. Light rays incident from the object side are incident on the dimming element through the first lens, and after being deflected and exited by the dimming element, they are incident on the second lens, the third lens, the fourth lens, and the fifth lens and exited to the image side to form an image.

[0007] The optical axes of the second lens, the third lens, the fourth lens, and the fifth lens are perpendicular to the optical axis of the first lens;

[0008] The lens module satisfies the following formula:

[0009] 25 < f1 < 35, where f1 represents the focal length of the first lens;

[0010] 5 < f2 < 10, where f2 represents the focal length of the second lens;

[0011] f / (F * K11) < 1.65, where K11 represents the effective aperture of the object plane of the fourth lens, F represents the aperture of the lens module, and f represents the focal length of the lens module.

[0012] In some embodiments, the lens module further satisfies the following relational expression:

[0013] 1 / F * tanω * sqrt(f / 100) < 0.2, where F represents the aperture of the lens module, ω represents the half field angle of the lens module, and f represents the focal length of the lens module.

[0014] In some embodiments, the lens module further satisfies the following relational expression:

[0015] 0.3 < S9 + S10 + S11 + S12 < 1, where S9 represents the sag of the object plane of the third lens, S10 represents the sag of the image plane of the third lens, S11 represents the sag of the object plane of the fourth lens, and S12 represents the sag of the image plane of the fourth lens.

[0016] In some embodiments, the lens module further satisfies the following relational expression:

[0017] |CT910 - CT1112| < 0.2, where CT910 represents the thickness of the third lens and CT1112 represents the thickness of the fourth lens.

[0018] In some embodiments, the lens module further satisfies the following relational expression:

[0019] CT45 / (CT78 + CT910 + CT1112) < 1.5, where CT45 represents the thickness of the light dimming component, CT78 represents the thickness of the second lens, CT910 represents the thickness of the third lens, and CT1112 represents the thickness of the fourth lens.

[0020] In some embodiments, the lens module forms an image on the image plane, and the lens module further satisfies the following relational expression:

[0021] TTL / f < 1, where TTL represents the total optical length of the lens module and f represents the focal length of the lens module.

[0022] In some embodiments, the lens module further satisfies the following relational expression: [[ID=|V3-V5|<20, where V3 represents the Abbe number of the third lens and V5 represents the Abbe number of the fifth lens.

[0024] In some embodiments, the lens module also satisfies the following relationship:

[0025] Vp<70, where Vp represents the Abbe number of the dimming element.

[0026] In some embodiments, it also includes:

[0027] A filter is located on one side of the exit surface of the fifth lens. Light rays exiting the fifth lens are incident on the filter and exit from the filter to the image side.

[0028] An aperture stop is located between the dimming element and the filter, and the optical axis of the aperture stop is perpendicular to the exit surface of the dimming element.

[0029] According to a second aspect of the embodiments of this application, a camera module is provided, comprising:

[0030] The lens module described in any of the above items;

[0031] Imaging chip;

[0032] Light incident from the object side passes through the lens module and exits, then enters the imaging chip from the lens module to form an image.

[0033] In some embodiments, the second lens, the third lens, the fourth lens, and the fifth lens are assembled together as a rear-mounted module, and the camera module further includes:

[0034] An autofocus motor is used to drive the rear module to move along the optical axis of the imaging chip to achieve focusing.

[0035] An optical image stabilization motor is used to drive the dimming element to rotate along the optical axis of the first lens to achieve image stabilization.

[0036] According to a third aspect of the embodiments of this application, an electronic device is provided, including: the camera module described in any one of the above.

[0037] In some embodiments, it also includes:

[0038] A housing, wherein a first receiving cavity is provided on the inner side of the housing;

[0039] Camera protective cover;

[0040] The camera protective cover protrudes from the outside of the housing to form a second receiving cavity that communicates with the first receiving cavity. The first lens is at least partially located in the second receiving cavity. The optical axes of the second lens, the third lens, the fourth lens, and the fifth lens are perpendicular to the thickness direction of the camera protective cover.

[0041] In this application, the lens module of the present invention is divided into an L-shaped camera module by adding a light-diffusing element for deflecting light into the linear lens module. The linear lens module is divided into a first lens located on the light-incident surface of the light-diffusing element and a second, third, fourth, and fifth lens located on the light-outcident surface of the light-diffusing element. Then, the parameters of each lens are adjusted to achieve parameter matching of the L-shaped lens module. After parameter adjustment, the ratio of the maximum aperture of the second, third, fourth, and fifth lenses of the L-shaped lens module to the entrance pupil diameter is less than 0.8. This means that while achieving a large aperture of the lens module, the aperture of the second, third, fourth, and fifth lenses, which are horizontally placed on the inner wall of the phone casing, is reduced. In addition, by adding a light-diffusing element, the length of the lens module is also effectively shortened.

[0042] The beneficial effects of the embodiments of the second to third aspects described above can be referred to the beneficial effects of the first aspect and the embodiments of the first aspect described above, and will not be repeated here.

[0043] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0045] Figure 1 A schematic diagram of the lens module in this application is shown;

[0046] Figure 2a This paper shows a schematic diagram of the structure of the dimming component of the lens module in Example 1 of this application, which is equivalent to a plane mirror.

[0047] Figure 2b The relative illumination curve of the lens module in Example 1 of this application is shown;

[0048] Figure 2c The field curvature and distortion curves of the lens module in Example 1 of this application are shown;

[0049] Figure 2d The axial aberration curve of the lens module in Example 1 of this application is shown;

[0050] Figure 2e The polychromatic light diffraction MTF of the lens module in Example 1 of this application is shown;

[0051] Figure 3a This paper shows a schematic diagram of the structure of the dimming component of the lens module in Example 2 of this application, which is equivalent to a plane mirror.

[0052] Figure 3b The relative illumination curve of the lens module in Example 2 of this application is shown;

[0053] Figure 3c The field curvature and distortion curves of the lens module in Example 2 of this application are shown;

[0054] Figure 3d The axial aberration curve of the lens module in Example 2 of this application is shown;

[0055] Figure 3e The polychromatic light diffraction MTF of the lens module in Example 2 of this application is shown;

[0056] Figure 4a This paper shows a schematic diagram of the structure of the dimming component of the lens module in Example 3 of this application, which is equivalent to a plane mirror.

[0057] Figure 4b The relative illumination curve of the lens module in Example 3 of this application is shown;

[0058] Figure 4c The field curvature and distortion curves of the lens module in Example 3 of this application are shown;

[0059] Figure 4d The axial aberration curve of the lens module in Example 3 of this application is shown;

[0060] Figure 4e The polychromatic light diffraction MTF of the lens module in Example 3 of this application is shown;

[0061] Figure 5 This application shows a schematic diagram of the lens module with added filters and apertures.

[0062] Figure 6 A schematic diagram of the camera module in this application is shown;

[0063] Figure 7 A schematic diagram of the electronic device in this application is shown. Detailed Implementation

[0064] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0065] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. Terms such as "center," "upper," "lower," "left," and "right," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, terms such as "first" and "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0066] It should also be noted that terms such as "including" or "comprising" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "set," "connect," or "linked" should be interpreted broadly and are not limited to physical or mechanical connections. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances. In the formulas listed herein, "*" represents a multiplication sign, and " / " represents a division sign.

[0067] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0068] Reference Figure 1As shown in the figure, a schematic structural diagram of a lens module 100 according to an embodiment of the present application is shown. The present application provides a lens module 100. The lens module 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a light-adjusting member 101. The light incident from the object side passes through the first lens L1 and then enters the light-adjusting member 101. After being deflected and emitted by the light-adjusting member 101, it enters and passes through the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 and is emitted to the image side for imaging. The optical axes of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are perpendicular to the optical axis of the first lens L1, and the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 form a rear component. The lens module 100 satisfies the following formula: 25 < f1 < 35, where f1 represents the focal length of the first lens L1; 5 < f2 < 10, where f2 represents the focal length of the second lens L2; f / (F * K11) < 1.65, where K11 represents the effective aperture of the object surface of the fourth lens L4, F represents the aperture of the lens module 100, and f represents the focal length of the lens module 100.

[0069] It should be understood that the positive optical power of the first lens L1 can converge light, which is beneficial to reducing the aperture of the subsequent lenses. Too large optical power will cause the light to enter P2 at too large an angle, resulting in large aberration. Too small optical power will not achieve the purpose of reducing the aperture of the subsequent lenses.

[0070] It should be understood that by making the second lens L2 satisfy the above relationship, the positive optical power of the second lens L2 can further converge the light of the first lens L1. Too large optical power will cause the light to converge excessively, resulting in a large incident angle on the third lens L3 and large aberration. Too small optical power will not have a significant effect on light convergence.

[0071] It should be understood that by making the effective aperture of the object surface of the fourth lens L4, the aperture of the lens module 100, and the focal length of the lens module 100 satisfy the above relationship, it is beneficial to control the aperture of the fourth lens.

[0072] In the lens module 100 of the present invention, by adding a light-adjusting member 101 for deflecting light to a linear lens module, the linear lens module is split into a first lens L1 on the incident light surface of the light-adjusting member 101 and a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 on the outgoing light surface of the light-adjusting member 101, thereby forming an L-shaped imaging module. Then, the parameters of each lens are adjusted to achieve parameter matching of the L-shaped lens module 100. After parameter adjustment, the ratio of the maximum aperture of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 of the L-shaped lens module 100 to the entrance pupil diameter is less than 0.8, which means that while achieving a large aperture of the lens module 100, the effect of reducing the aperture of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5, which are horizontally placed on the inner wall of the mobile phone case, is achieved. In addition, by adding the light-adjusting member 101 that can deflect light, the length of the lens module 100 is effectively shortened.

[0073] In some embodiments, the lens module 100 also satisfies the following relationship: 1 / F * tanω * sqrt(f / 100) < 0.2, where F represents the aperture of the lens module 100, ω represents the half field angle of the lens module 100, and f represents the focal length of the lens module 100.

[0074] It should be understood that by making the aperture of the lens module 100, the half field angle of the lens module 100, and the focal length of the lens module 100 satisfy the above relationship, a certain balance can be achieved among the three parameters of the aperture of the lens module 100, the field angle of the lens module 100, and the focal length of the lens module 100, avoiding individual parameters from exceeding the limit capabilities of the lens module 100.

[0075] In some embodiments, the lens module 100 also satisfies the following relationship: 0.3 < S9 + S10 + S11 + S12 < 1, where S9 represents the sagittal height of the object surface of the third lens L3, S10 represents the sagittal height of the image surface of the third lens L3, S11 represents the sagittal height of the object surface of the fourth lens L4, and S12 represents the sagittal height of the image surface of the fourth lens L4.

[0076] It should be understood that by making the sagittal height of the object surface of the third lens L3, the sagittal height of the image surface of the third lens L3, the sagittal height of the object surface of the fourth lens L4, and the sagittal height of the image surface of the fourth lens L4 satisfy the above relationship, due to the combination of reverse sagittal heights, the overall sagittal height of the lens module 100 is controlled within a certain range, which is beneficial to ensuring that the principal ray incident angle of the lens module 100 meets the requirements of the imaging chip, improving the relative illuminance, and avoiding the generation of vignetting; at the same time, it solves the problems of difficult lens processing and difficult lens assembly caused by too large sagittal height differences.

[0077] In some embodiments, the lens module 100 also satisfies the following relationship: |CT910-CT1112|<0.2, where CT910 represents the thickness of the third lens L3 and CT1112 represents the thickness of the fourth lens L4.

[0078] It is important to understand that by ensuring that the thicknesses of the third lens L3 and the fourth lens L4 satisfy the above relationship, the thickness difference between the third lens L3 and the fourth lens L4 is small, which can smoothly reduce the light aperture and is beneficial for spherical aberration and coma correction.

[0079] In some embodiments, the lens module 100 also satisfies the following relationship: CT45 / (CT78+CT910+CT1112)<1.5, where CT45 represents the thickness of the dimming element 101, CT78 represents the thickness of the second lens L2, CT910 represents the thickness of the third lens L3, and CT1112 represents the thickness of the fourth lens L4.

[0080] It should be understood that by ensuring that the thickness of the dimming element 101, the thickness of the second lens L2, the thickness of the third lens L3, and the thickness of the fourth lens L4 satisfy the above relationship, it is beneficial to balance the thickness of the dimming element 101 with the thicknesses of the second lens L2, the third lens L3, and the fourth lens L4, which is beneficial to the assembly of the camera module 10.

[0081] In some embodiments, the lens module 100 images onto the imaging plane, and the lens module 100 also satisfies the following relationship: TTL / f<1, where TTL represents the total optical length of the lens module 100, f represents the focal length of the lens module 100, and the total optical length is defined as the distance from the first lens L1 to the imaging plane.

[0082] It should be understood that by making the total optical length of the lens module 100 and the focal length of the lens module 100 satisfy the above relationship, a smaller ratio of the focal length to the total optical length of the lens module 100 can achieve a smaller total optical length for a certain focal length, thereby reducing the size of the camera module 10.

[0083] In some embodiments, the lens module 100 also satisfies the following relationship: |V3-V5|<20, where V3 represents the Abbe number of the third lens L3 and V5 represents the Abbe number of the fifth lens L5.

[0084] It is important to understand that by ensuring that the Abbe number of the third lens L3 and the fifth lens L5 satisfy the above relationship, the difference between the Abbe numbers of the third lens L3 and the fifth lens L5 is small, which is beneficial for correcting chromatic aberration in the system.

[0085] In some embodiments, the lens module 100 also satisfies the following relationship: Vp < 70, where Vp represents the Abbe number of the dimming element 101.

[0086] It should be understood that by ensuring that the Abbe number of the dimming element 101 satisfies the above relationship, it is possible to avoid the situation where the system color difference cannot be corrected after the dimming element 101 introduces too large an Abbe number.

[0087] In some embodiments, refer to Figure 5 The diagram shows a schematic of the lens module 100 in this application with the addition of a filter IR and an aperture stop S. The lens module 100 further includes: a filter IR, which is located on one side of the exit surface of the fifth lens L5. Light rays exiting the fifth lens L5 are incident on the filter IR and exit from the filter IR to the image side; and an aperture stop S, which is located between the dimming element 101 and the filter IR. The optical axis of the aperture stop S is perpendicular to the exit surface of the dimming element 101.

[0088] It is important to understand that placing the IR filter after the fifth lens (L5) can correct the chromatic aberration produced by all the lenses in the IR filter, resulting in the best correction effect for chromatic aberration and facilitating the achievement of a large aperture and low total length.

[0089] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one mirror surface from the object side of the first lens to the image side of the eighth lens is an aspherical mirror surface. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the lens periphery, aspherical lenses have better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism.

[0090] By using aspherical lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0091] However, those skilled in the art will understand that the number of lenses constituting the lens assembly 100 can be changed without departing from the technical solutions claimed in this application to obtain the various results and advantages described in this specification. For example, although four lenses are described as an example in the embodiment, the lens assembly 100 is not limited to including four lenses, and may include other numbers of lenses if needed.

[0092] The following describes a specific embodiment of the lens module 100 applicable to the above embodiments with reference to the accompanying drawings. Specifically, three examples are given.

[0093] Table 1 below shows the parameters that satisfy the above conditions for three examples:

[0094] Table 1

[0095] Conditional expression Example 1 1 / F*tanω*sqrt(f / 100) 0.011 f1 30.32 f2 6.98 S9+S10+S11+S12 0.48 |CT910-CT1112| 0.05 f / (F*K11) 1.46 K3 / K4 1.01 CT45 / (CT78+CT910+CT1112) 1.40 TTL / f 0.99 |V3-V5| 1.8 VP 64.2

[0096] Example 1

[0097] Figure 2a A schematic diagram of the lens module 100 in Example 1 of this application is shown. The specific parameters of Example 1 are shown in Tables 2, 3 and 4:

[0098] Table 2 below shows the basic parameters of the lens module 100 in Example 1.

[0099] Table 2

[0100] focal length 13.5mm equivalent focal length 97mm band 470~650nm aperture 2.44 Imaging circle 6.28mm Field of view 25° Overall optical length 13.4mm Number of lenses 5 elements + 1 prism

[0101] Tables 3 and 4 below show the basic parameters of each lens element in lens module 100. The units for radius of curvature, thickness, focal length, net aperture, and sagitta are all mm.

[0102] Table 3

[0103]

[0104] Table 4

[0105]

[0106]

[0107] As can be seen from Table 3, the maximum aperture of the rear component of the lens module 100 in Example 1 (second lens L2, third lens L3, fourth lens L4 and fifth lens L5) is 4.55mm, which is smaller than the aperture diameter of 4.67mm in Example 1, thus achieving a reduction in the maximum aperture of the rear component.

[0108] Figure 2b The figure shows the relative illumination curve of the lens module in specific embodiment 1 of this application. The horizontal axis represents the image height, and the vertical axis represents the relative illumination value. The image height represents the highest value of 100% (0 is the maximum value). The relative illumination value gradually decreases as the image height increases. Figure 2b As can be seen, a relative illuminance greater than 0.65% indicates uniform brightness in the image. Figure 2c The field curvature and distortion curves of the lens module in specific embodiment 1 of this application are shown. In the field curvature curve, the horizontal axis represents the field curvature value, and the vertical axis represents the image height. Different curves represent the field curvature values ​​of different colors of light at different image heights. In the distortion curve, the horizontal axis represents the distortion magnitude, and the vertical axis represents the image height. Different curves represent the distortion magnitude of different colors of light at different image heights. Figure 2c As can be seen, the field curvature is within ±20µm and the distortion is less than 3%, indicating that both field curvature and distortion are well corrected. Figure 2dThe figure shows the axial aberration curves of the lens module in specific embodiment 1 of this application. The horizontal axis represents the aberration magnitude, and the vertical axis represents the normalized aperture. Different curves represent the aberration magnitudes of different colors of light at different apertures. Figure 2d It can be seen that the axial aberration is less than 0.02mm, indicating that the correction is relatively good; Figure 2e The diagram illustrates the polychromatic light diffraction MTF of the lens module in specific embodiment 1 of this application. The horizontal axis represents frequency, and the vertical axis represents the MTF value (i.e., OTF modulus). A higher MTF value indicates better imaging quality. The MTF gradually decreases as the frequency increases. Figure 2e It can be seen that the MTF is close to the diffraction limit, indicating good performance; according to Figures 2b to 2e As can be seen from the figure, the lens module 100 given in Example 1 can achieve good imaging quality.

[0109] Example 2

[0110] Figure 3a A schematic diagram of the optical system lens module 100 in Example 2 of this application is shown. The specific parameters of the lens module 100 in Example 2 are shown in Tables 5, 6 and 7.

[0111] Table 2 below shows the basic parameters of the lens module 100 in Example 1.

[0112] Table 5

[0113] focal length 16mm equivalent focal length 97mm band 470~650nm aperture 2.3 Imaging circle 7.4mm Field of view 26° Overall optical length 15.55mm Number of lenses 5 elements + 1 prism

[0114] Tables 6 and 7 below show the basic parameters of each lens element in lens module 100. The units for radius of curvature, thickness, focal length, net aperture, and sagitta are all mm.

[0115] Table 6

[0116]

[0117] Table 7

[0118]

[0119]

[0120] As can be seen from Table 6, the maximum aperture of the rear component of the lens module 100 in Example 2 (second lens L2, third lens L3, fourth lens L4 and fifth lens L5) is 5.18mm, which is smaller than the aperture diameter of 5.32mm in Example 2, thus achieving a reduction in the maximum aperture of the rear component.

[0121] Figure 3bThe figure shows the relative illumination curve of the lens module in specific embodiment 2 of this application. The horizontal axis represents the image height, and the vertical axis represents the relative illumination value. The image height represents the highest value of 100% (0 is the maximum value). The relative illumination value gradually decreases as the image height increases. Figure 3b As can be seen, the relative illuminance is greater than 65%, and the image brightness is uniform. Figure 3c The field curvature and distortion curves of the lens module in specific embodiment 2 of this application are shown. In the field curvature curve, the horizontal axis represents the field curvature value, and the vertical axis represents the image height. Different curves represent the field curvature values ​​of different colors of light at different image heights. In the distortion curve, the horizontal axis represents the distortion magnitude, and the vertical axis represents the image height. Different curves represent the distortion magnitude of different colors of light at different image heights. Figure 3c As can be seen, the field curvature is within ±0.03mm, indicating a good correction effect; the distortion is less than 2.5%, indicating a good correction effect with no obvious distortion. Figure 3d The figure shows the axial aberration curves of the lens module in specific embodiment 2 of this application. The horizontal axis represents the aberration magnitude, and the vertical axis represents the normalized aperture. Different curves represent the aberration magnitudes of different colors of light under different apertures. Figure 3d As can be seen, the axial aberration is ±0.012mm, indicating a very good correction effect; Figure 3e The diagram illustrates the polychromatic light diffraction MTF of the lens module in specific embodiment 2 of this application. The horizontal axis represents frequency, and the vertical axis represents the MTF value (i.e., OTF modulus). A higher MTF value indicates better imaging quality. The MTF gradually decreases as the frequency increases. Figure 3e It can be seen that the MTF is close to the diffraction limit, and the image is clear; according to Figures 3b to 3e As shown, the lens module 100 given in Embodiment 2 can achieve good imaging quality.

[0122] Example 3

[0123] Figure 4a A schematic diagram of the optical system lens module 100 in Example 3 of this application is shown. The specific parameters of the lens module 100 in Example 3 are shown in Tables 8, 9 and 10.

[0124] Table 8 below shows the basic parameters of the lens module 100 in Example 1.

[0125] Table 8

[0126] focal length 18mm equivalent focal length 97mm band 470~650nm aperture 2.44 Imaging circle 8.2mm Field of view 25° Overall optical length 17.66mm Number of lenses 5 elements + 1 prism

[0127] Tables 9 and 10 below show the basic parameters of each lens element in lens module 100. The units for radius of curvature, thickness, focal length, net aperture, and sagitta are all mm.

[0128] Table 9

[0129]

[0130]

[0131] Table 10

[0132]

[0133]

[0134] As can be seen from Table 9, the maximum aperture of the rear component of the lens module 100 in Example 3 (second lens L2, third lens L3, fourth lens L4 and fifth lens L5) is 5.82mm, which is smaller than the aperture diameter of 5.92mm in Example 3, thus achieving a reduction in the maximum aperture of the rear component.

[0135] Figure 4b The figure shows the relative illumination curve of the lens module in specific embodiment 3 of this application. The horizontal axis represents the image height, and the vertical axis represents the relative illumination value. The image height represents the highest value of 100% (0 is the maximum value). The relative illumination value gradually decreases as the image height increases. Figure 4b As can be seen, the relative illuminance is greater than 65%, which is very high. Figure 4c The field curvature and distortion curves of the lens module in specific embodiment 3 of this application are shown. In the field curvature curve, the horizontal axis represents the field curvature value, and the vertical axis represents the image height. Different curves represent the field curvature values ​​of different colors of light at different image heights. In the distortion curve, the horizontal axis represents the distortion magnitude, and the vertical axis represents the image height. Different curves represent the distortion magnitude of different colors of light at different image heights. Figure 4c As can be seen, the field curvature is within ±0.025mm, and the distortion is <2.2%; the field curvature and distortion corrections are very good. Figure 4d The figure shows the axial aberration curves of the lens module in specific embodiment 3 of this application. The horizontal axis represents the aberration magnitude, and the vertical axis represents the normalized aperture. Different curves represent the aberration magnitudes of different colors of light under different apertures. Figure 4d It can be seen that the axial aberration is less than 0.012mm, and the axial aberration correction is very good; Figure 4e The diagram illustrates the polychromatic light diffraction MTF of the lens module in specific embodiment 3 of this application. The horizontal axis represents frequency, and the vertical axis represents the MTF value (i.e., OTF modulus). A higher MTF value indicates better imaging quality. The MTF gradually decreases as the frequency increases. Figure 4e It can be seen that the MTF is close to the diffraction limit, and the image quality is very good; according to Figures 4b to 4e As can be seen from the figure, the lens module 100 given in Example 3 can achieve good imaging quality.

[0136] See Figure 6 As shown, Figure 6A schematic diagram of the structure of the camera module 10 in this application is shown. According to a second aspect of the embodiments of this application, a camera module 10 is provided, including: a lens module 100 and an imaging chip 200 as described above. Light incident from the object side passes through the lens module 100 and exits, and then enters the imaging chip 200 from the lens module 100 to form an image.

[0137] It should be understood that by adopting the above-mentioned improved lens module 100 on the camera module 10, the optical axis (Z-axis direction in the figure) of the lens module 100 from the second lens L2 to the fifth lens L5 can be further reduced, and the waist diameter (Y-axis direction in the figure) of the second lens L2 to the fifth lens L5 of the lens module is reduced.

[0138] In some embodiments, refer to Figure 6 The diagram shows a schematic of the camera module in this application. The second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are assembled together as a rear camera module. The camera module 10 also includes: an autofocus motor 102, which drives the rear camera module to move along the optical axis direction (Z-axis direction in the figure) of the imaging chip 200 to achieve focusing; and an optical image stabilization motor 103, which drives the dimming element 101 to rotate along the optical axis direction (Y-axis direction in the figure) of the first lens L1 to achieve image stabilization.

[0139] It should be understood that by reasonably setting the autofocus motor 102 on the camera module 10 and the optical image stabilization motor on the dimming component 101, the image stabilization performance of the entire camera module 10 can be further optimized.

[0140] See Figure 7 The diagram shows a schematic representation of the structure of an electronic device according to the present application. According to a third aspect of the embodiments of the present application, an electronic device is provided, including: a camera module 10 as described above.

[0141] It should be understood that by assembling the improved camera module 10 into an electronic device, the electronic device can be made thinner and lighter.

[0142] In some embodiments, refer to Figure 7 As shown, it also includes: a housing 20, with a first receiving cavity 201 and a camera protective cover 30 disposed inside the housing 20. The camera protective cover 30 protrudes from the outside of the housing 20 to form a second receiving cavity 301 that communicates with the first receiving cavity 201. The first lens L1 is at least partially located in the second receiving cavity 301. The optical axes of the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are perpendicular to the thickness direction (Y-axis direction in the figure) of the camera protective cover 30.

[0143] It's important to understand that designing the conventional linear lens module 100 as an L-shaped lens module 100 shortens its length. Installing the protruding part of the L-shaped lens module 100 within the camera trim, specifically the camera cover 30, reduces its impact on the thickness of the casing 20, thus making mobile phones or tablets thinner and lighter.

[0144] It should also be noted that the accompanying drawings of the embodiments of this application only involve structures relevant to the embodiments of this application; other structures can refer to general designs. Where there is no conflict, the embodiments of this application and the features described therein can be combined to obtain new embodiments.

[0145] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lens module, characterized in that: The lens module includes a first lens with a positive optical power, a second lens with a positive optical power, a third lens with a negative optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, and a light regulating member. The number of lenses with optical power in the lens module is five. The light incident from the object side enters the first lens and then enters the light regulating member. After being deflected and emitted by the light regulating member, it enters the second lens, the third lens, the fourth lens, and the fifth lens in sequence and is emitted to the image side for imaging; The optical axes of the second lens, the third lens, the fourth lens, and the fifth lens are perpendicular to the optical axis of the first lens; The lens module satisfies the following formula: 25 < f1 < 35, where f1 represents the focal length of the first lens; 5 < f2 < 10, where f2 represents the focal length of the second lens; f / (F * K11) < 1.65, where K11 represents the effective aperture of the object surface of the fourth lens, F represents the aperture of the lens module, and f represents the focal length of the lens module.

2. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: 1 / F * tanω * sqrt(f / 100) < 0.2, where F represents the aperture of the lens module, ω represents the half field angle of the lens module, and f represents the focal length of the lens module.

3. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: 0.3 < S9 + S10 + S11 + S12 < 1, where S9 represents the sagittal height of the object surface of the third lens, S10 represents the sagittal height of the image surface of the third lens, S11 represents the sagittal height of the object surface of the fourth lens, and S12 represents the sagittal height of the image surface of the fourth lens.

4. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: |CT910 - CT1112| < 0.2, where CT910 represents the thickness of the third lens and CT1112 represents the thickness of the fourth lens.

5. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: CT45 / (CT78 + CT910 + CT1112) < 1.5, where CT45 represents the thickness of the light regulating member, CT78 represents the thickness of the second lens, CT910 represents the thickness of the third lens, and CT1112 represents the thickness of the fourth lens.

6. The lens module according to claim 1, wherein the lens module images onto an imaging plane, characterized in that, The lens module also satisfies the following relational expressions: TTL / f < 1, where TTL represents the total optical length of the lens module and f represents the focal length of the lens module.

7. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: |V3 - V5| < 20, where V3 represents the Abbe number of the third lens and V5 represents the Abbe number of the fifth lens.

8. The lens module according to claim 1, characterized in that, The lens module also satisfies the following relational expressions: Vp < 70, where Vp represents the Abbe number of the light regulating member.

9. The lens module according to claim 1, characterized in that, It further includes: A filter, which is located on one side of the exit surface of the fifth lens. The light emitted from the fifth lens enters the filter and then is emitted to the image side after passing through the filter; An aperture, which is located between the light regulating member and the filter, and the optical axis of the aperture is perpendicular to the exit surface of the light regulating member.

10. A camera module, characterized in that, It includes: The lens module according to any one of claims 1 to 9; An imaging chip; Light incident from the object side passes through the lens module and exits, then enters the imaging chip from the lens module to form an image.

11. The camera module according to claim 10, characterized in that, The second lens, the third lens, the fourth lens, and the fifth lens are assembled together as a rear camera module, which also includes: An autofocus motor is used to drive the rear module to move along the optical axis of the imaging chip to achieve focusing. An optical image stabilization motor is used to drive the dimming element to rotate along the optical axis of the first lens to achieve image stabilization.

12. An electronic device, characterized in that, include: The camera module according to any one of claims 10 to 11.

13. The electronic device according to claim 12, characterized in that, Also includes: A housing, wherein a first receiving cavity is provided on the inner side of the housing; Camera protective cover; The camera protective cover protrudes from the outside of the housing to form a second receiving cavity that communicates with the first receiving cavity. The first lens is at least partially located in the second receiving cavity. The optical axes of the second lens, the third lens, the fourth lens, and the fifth lens are perpendicular to the thickness direction of the camera protective cover.

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