Optical lens, camera module and electronic equipment

Abstract

The utility model discloses an optical lens, a camera module and electronic equipment, and the optical lens comprises a first lens to a seventh lens which are sequentially arranged from an object side to an image side along an optical axis. Wherein the first lens and the fourth lens have positive focal power, and the second lens, the third lens, the fifth lens, the sixth lens and the seventh lens have negative focal power. The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the sum of the thicknesses of the first lens to the seventh lens on the optical axis is sigma CT, and the optical lens meets the relational expression that (CT2 + CT3) / sigma CT is larger than 0.10 and smaller than 0.20. According to the optical lens disclosed by the invention, the second lens and the third lens are relatively small in center thickness, and the proportion of the second lens and the third lens to the total center thickness of the lens is relatively small, so that the collimation of light in the optical axis direction is improved. Thus, the resolution of the optical lens can be improved, the camera module can focus in a shorter focusing stroke, and the overall thickness of the camera module can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging, and particularly relates to an optical lens, a camera module and an electronic device. BACKGROUND

[0002] When the camera module realizes focusing, the optical lens is usually driven by a motor to move. However, the existing camera module has poor resolving power for light, which leads to increased difficulty in focusing and a long focusing distance. That is, the poor resolving power of the camera module leads to a long moving distance of the optical lens in the camera module to realize effective focusing in the focusing process. Therefore, a certain space needs to be left in the camera module for the movement of the optical lens. In this way, the overall thickness of the camera module is large, which is not conducive to the miniaturization design of the camera module. UTILITY MODEL CONTENT

[0003] Embodiments of the present application disclose an optical lens, a camera module and an electronic device, wherein the optical lens is used to reduce the overall thickness of the camera module and realize the miniaturization design of the camera module.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, which has seven lenses with refractive power in total, and the optical lens comprises, in order from the object side to the image side along the optical axis:

[0005] a first lens, the first lens has positive refractive power, the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface of the first lens is a convex surface at the near optical axis;

[0006] a second lens, the second lens has negative refractive power, the object side surface of the second lens is a convex surface at the near optical axis, and the image side surface of the second lens is a concave surface at the near optical axis;

[0007] a third lens, the third lens has negative refractive power, the object side surface of the third lens is a concave surface at the near optical axis, and the image side surface of the third lens is a concave surface at the near optical axis;

[0008] a fourth lens, the fourth lens has positive refractive power, the object side surface of the fourth lens is a convex surface at the near optical axis, and the image side surface of the fourth lens is a convex surface at the near optical axis;

[0009] a fifth lens, the fifth lens has negative refractive power, the object side surface of the fifth lens is a concave surface at the near optical axis, and the image side surface of the fifth lens is a convex surface at the near optical axis;

[0010] a sixth lens, the sixth lens has negative refractive power, the object side surface of the sixth lens is a concave surface at the near optical axis, and the image side surface of the sixth lens is a convex surface at the near optical axis;

[0011] a seventh lens having negative refractive power, an object side surface of the seventh lens being concave at the near optical axis, an image side surface of the seventh lens being concave at the near optical axis;

[0012] wherein a thickness of the second lens on the optical axis is CT2, a thickness of the third lens on the optical axis is CT3, a sum of the thicknesses of the first lens to the seventh lens on the optical axis is∑CT, and the optical lens satisfies a relationship: 0.10 < (CT2 + CT3) / ∑CT < 0.20.

[0013] As an optional implementation, the optical lens satisfies a relationship: 0.8 < CT2 / CT3 < 1.0, and / or, 0.4 < (CT5 + CT6 + CT7) / ∑CT < 0.6.

[0014] wherein a thickness of the fifth lens on the optical axis is CT5, a thickness of the sixth lens on the optical axis is CT6, and a thickness of the seventh lens on the optical axis is CT7.

[0015] As an optional implementation, the optical lens satisfies a relationship:

[0016] 0.3mm < CT2 < 0.5mm, and / or, 0.3mm < CT3 < 0.5mm, and / or, 0.5mm < CT1 < 1.1mm, and / or, 0.5mm < CT4 < 1.1mm, and / or, 0.5mm < CT5 < 1.1mm, and / or, 0.5mm < CT6 < 1.1mm, and / or, 0.5mm < CT7 < 1.1mm;

[0017] wherein a thickness of the first lens on the optical axis is CT1, a thickness of the fourth lens on the optical axis is CT4, a thickness of the fifth lens on the optical axis is CT5, a thickness of the sixth lens (L6) on the optical axis is CT6, and a thickness of the seventh lens on the optical axis is CT7.

[0018] As an optional implementation, the optical lens satisfies: 0.60 < ∑CT / TTL < 0.70.

[0019] wherein TTL is a distance on the optical axis from an object side surface of the first lens to an imaging surface of the optical lens.

[0020] As an optional implementation, an effective half-aperture of the image side surface of the second lens is SD22, and an effective half-aperture of the object side surface of the third lens is SD31, and the SD22 and the SD31 satisfy a relationship: 0.9 < SD22 / SD31 < 1.1.

[0021] In a second aspect, the present application discloses a camera module, comprising:

[0022] The optical lens according to the first aspect; and

[0023] An image sensor, which is arranged on an image side of the optical lens.

[0024] As an optional implementation, the camera module comprises a driving motor, the driving motor comprises a carrier and a spring piece, the carrier has a receiving cavity to carry the optical lens, the spring piece is arranged in the receiving cavity, the spring piece connects the carrier and the optical lens in a radial direction of the optical axis, and the carrier is configured to drive the optical lens to move along the optical axis, and the spring piece is configured to drive the optical lens to move along the optical axis under the driving of the carrier.

[0025] As an optional implementation, an outer circumferential surface of the optical lens has a gap to an inner side wall of the receiving cavity, the spring piece is located in the gap to shield the gap, and a side surface of the spring piece in the direction of the optical axis is provided with a vent hole.

[0026] As an optional implementation, the spring piece comprises two spring pieces, and the two spring pieces are arranged at intervals in the direction of the optical axis.

[0027] At least one of the spring pieces shields the gap, and a side surface of the spring piece in the direction of the optical axis is provided with the vent hole.

[0028] As an optional implementation, the thickness of the spring piece is 50 μm-100 μm; and / or

[0029] The vent hole is a plurality of vent holes, and the plurality of vent holes are arranged at intervals around the optical axis; and / or

[0030] The vent hole has a hole area of 0.2 mm 2 -0.8 mm 2 .

[0031] As an optional implementation, a gap is arranged between the spring piece and the carrier in the radial direction of the optical axis, and / or a gap is arranged between the spring piece and the optical lens.

[0032] As an optional implementation, the displacement of the optical lens in the direction of the optical axis is 0 μm-100 μm.

[0033] In a third aspect, the present application discloses an electronic device, comprising a shell and the camera module according to the second aspect, and the camera module is arranged in the shell.

[0034] Compared with the prior art, the present application has the beneficial effects that:

[0035] The optical lens, the camera module and the electronic device are disclosed. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence along an optical axis from an object side to an image side. The first lens and the fourth lens have positive refractive powers, and the second lens, the third lens, the fifth lens, the sixth lens and the seventh lens have negative refractive powers. The thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the sum of the thicknesses of the first lens to the seventh lens on the optical axis is ΣCT. The optical lens satisfies the relationship: 0.10 < (CT2+CT3) / ΣCT < 0.20. In the optical lens disclosed in the application, the central thicknesses of the second lens and the third lens are small, and the proportion of the central total thickness of the lenses of the optical lens is small. When the light passes through the second lens and the third lens, the collimation degree of the light along the optical axis is improved. When the light passes through the fourth lens to the seventh lens which are thicker, the light is decomposed. In this way, the resolving power of the optical lens is improved. When the optical lens is arranged in the camera module, the better resolving power helps the camera module to focus in a shorter focusing stroke. The reduction of the focusing stroke helps to reduce the activity space of the optical lens in the camera module, thereby helping to reduce the overall thickness of the camera module. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0037] Figure 1 The structural schematic diagram of the optical lens disclosed in the embodiments of the application;

[0038] Figure 2 The optical path diagram of the optical lens disclosed in the embodiments of the application;

[0039] Figure 3 The MTF value chart of the optical lens disclosed in the embodiments of the application at a near focus of 1 meter;

[0040] Figure 4 The MTF value chart of the optical lens disclosed in the embodiments of the application at a far focus of 5 meters;

[0041] Figure 5 The cross-sectional view of the camera module disclosed in the embodiments of the application;

[0042] Figure 6 The top view of the camera module disclosed in the embodiments of the application;

[0043] Figure 7 Structure schematic diagram of electronic device disclosed in embodiments of the present application.

[0044] Legend of reference signs:

[0045] 100, optical lens; L1, first lens; L2, second lens; L3, third lens; L4, fourth lens; L5, fifth lens; L6, sixth lens; L7, seventh lens; O, optical axis;

[0046] 200, camera module; 201, image sensor; 202, driving motor; 2021, carrier; 2022, spring piece; 202a, accommodating cavity; 202b, interval; 202c, air hole;

[0047] 300, electronic device. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0049] In the present application, the positions or location relationships indicated by the terms “inner”, “outer”, “middle” and the like are based on the positions or location relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0050] In addition, in addition to being used to represent the position or location relationship, the above-mentioned part of the terms can also be used to represent other meanings, for example, the term “upper” can also be used to represent a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0051] In addition, the terms “mounting”, “setting”, “provided with”, “connection” should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific situation.

[0052] In addition, the terms "first", "second", and the like are used only to distinguish different devices, elements or components (the specific type and configuration of which can be the same or different), and are not intended to indicate or imply relative importance or quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0053] In the related art, when focusing is implemented, the camera module usually drives the optical lens to move along the optical axis by the motor inside the camera module. However, the existing camera module has weak light resolution, and usually needs a long focusing stroke in the focusing process, which will inevitably cause the overall thickness of the camera module to be set thicker to provide sufficient focusing stroke. In this way, it is not conducive to the miniaturization design of the camera module. Moreover, in order to adapt to the long focusing stroke of the camera module and effectively drive the optical lens to move, the motor usually uses a spring sheet or a spring sheet with a large degree of hollow to drive the optical lens to move, so as to provide better driving force and restoring force for the optical lens. Because the spring sheet or the spring sheet has a large degree of hollow, the dust protection effect is weak during use or assembly of the camera module, which is easy to cause dust into the camera module, pollute the image sensor, and affect the shooting effect of the camera module.

[0054] Based on this, the application discloses an optical lens, a camera module and an electronic device. Among them, the optical lens disclosed in the application has good optical resolution, which is conducive to the adjustment of the optical lens to the incident light to improve the collimation of the light. In this way, the focusing stroke of the optical lens can be effectively reduced in the focusing process, the focusing time is shorter, and the focusing speed is faster. For the camera module, the focusing stroke of the optical lens is shortened, so that the camera module can reduce the original focusing space of the optical lens to adapt to the focusing stroke of the optical lens of the application, so as to reduce the overall thickness of the camera module, and facilitate the miniaturization design of the camera module. In addition, in the camera module of the application, because the focusing stroke of the optical lens is shortened, the spring sheet with better sealing effect can be used to improve the dustproof effect of the camera module.

[0055] The technical solutions of the application will be further described below in combination with embodiments and drawings.

[0056] In a first aspect, see Figure 1 and Figure 2This application discloses an optical lens 100 comprising seven refractive lenses. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 has positive optical power; both its object-side and image-side surfaces are convex near the optical axis O. The second lens L2 has negative optical power; both its object-side and image-side surfaces are concave near the optical axis O. The third lens L3 has negative optical power; both its object-side and image-side surfaces are concave near the optical axis O. The fourth lens L4 has positive optical power. Both its object-side surface and image-side surface are convex near the optical axis O. The fifth lens L5 has negative optical power. Both its image-side surface and image-side surface are concave near the optical axis O. The sixth lens L6 has negative optical power. Both its object-side surface and image-side surface are concave near the optical axis O. The seventh lens L7 has negative optical power. Both its object-side surface and image-side surface are concave near the optical axis O. The thickness of the second lens L2 along the optical axis O is CT2, and the thickness of the third lens L3 along the optical axis O is CT3. The sum of the thicknesses of the first lens L1 to the seventh lens L7 along the optical axis O is ΣCT. The optical lens 100 satisfies the following relationship: 0.10 < (CT2 + CT3) / ΣCT < 0.20.

[0057] In the optical lens 100 disclosed in this application, the center thickness of the second lens L2 and the third lens L3 is relatively small, accounting for a small proportion of the total center thickness of the optical lens 100, within 10%-20%. For example, as... Figure 2 As shown, when light enters the optical lens 100, it first passes through the first lens L1 with positive optical power, then through the second and third lenses with negative optical power and a thinner center thickness, thus adjusting the light path and improving the collimation of the light. Finally, after passing through the fourth, fifth, sixth, and seventh lenses, the light achieves better resolution. In this way, the optical lens 100 has good light resolution, enabling it to focus within a shorter focusing distance. This helps reduce the movement space of the optical lens 100 within the camera module 200, thereby reducing the overall thickness of the camera module 200 and achieving a miniaturized design.

[0058] Exemplarily, the ratio of (CT2+CT3) / ∑CT can also be 0.11-0.13, 0.12-0.14, 0.13-0.15, 0.14-0.16, 0.15-0.17, 0.16-0.18, 0.17-0.19, 0.18-0.20, for example, the ratio of (CT2+CT3) / ∑CT can be 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, or 0.19, etc.

[0059] Optionally, the first lens L1 to the seventh lens L7 can be, but are not limited to, plastic lenses, glass lenses, etc., which are not specifically limited herein.

[0060] Optionally, the first lens L1 to the seventh lens L7 are all aspherical lenses. It can be understood that, compared with spherical lenses, aspherical lenses can be designed to be thinner and have better imaging quality, which is conducive to being applied in the optical lenses of the camera module 200 of the portable electronic device 300, and is conducive to the miniaturization design of the camera module 200 and the portable electronic device 300.

[0061] In some embodiments, the optical lens 100 also satisfies the following relationship: 0.8<CT2 / CT3<1.0. That is, the central thicknesses of the second lens L2 and the third lens L3 are similar. In this way, it is conducive to reducing the scattering of light after passing through the second lens L2 and the third lens L3, thereby being conducive to maintaining the collimation degree of the light in the optical lens 100, so that the optical lens 100 has good resolving power for the light after the light passes through the first lens L1 to the seventh lens L7.

[0062] Exemplarily, CT2 / CT3 can be 0.81-0.03, 0.82-0.84, 0.83-0.85, 0.84-0.86, 0.85-0.87, 0.86-088, 0.87-0.89, 0.88-0.90, 0.89-0.91, 0.90-0.92, 0.91-0.93, 0.92-0.94, 0.93-0.95, 0.94-0.96, 0.95-0.97, 0.96-0.98, 0.97-0.99, etc., for example, CT2 / CT3 can be 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, or 0.99, etc.

[0063] Optionally, an effective half-aperture of an image side of the second lens L2 is SD22, and an effective half-aperture of an object side of the third lens L3 is SD31, and SD22 and SD31 satisfy a relationship: 0.9<SD22 / SD31<1.1. It can be understood that the effective half-apertures of the second lens L2 and the third lens L3 are similar in size. In this way, the collimation degree of the light changes little when passing through the second lens L2 and the third lens L3, which is beneficial to the collimation degree of the overall optical path.

[0064] Exemplarily, SD22 / SD31 can be 0.91-0.93, 0.92-0.94, 0.93-0.95, 0.94-0.96, 0.95-0.97, 0.96-0.98, 0.97-0.99, 0.98-1.10, 0.99-1.01, 1.00-1.02, 1.01-1.03, 1.02-1.04, 1.03-1.05, 1.04-1.06, 1.05-1.07, 1.06-1.08, 1.07-1.09, etc., for example, SD22 / SD31 can be 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1.00, 1.01, 1.02, 1.03, 1.04, 1.05, 1.06, 1.07, 1.08, or 1.09, etc.

[0065] Optionally, the optical lens 100 also satisfies a relationship: 0.4<(CT5+CT6+CT7) / ∑CT<0.6. Wherein, a thickness of the fifth lens L5 on the optical axis O is CT5, a thickness of the sixth lens L6 on the optical axis O is CT6, and a thickness of the seventh lens L7 on the optical axis O is CT7. It can be understood that the fifth lens L5, the sixth lens L6, and the seventh lens L7 are all lenses with negative focal length. Please refer to Figure 2 When the central thicknesses of the fifth lens L5, the sixth lens L6, and the seventh lens L7 satisfy 0.4<(CT5+CT6+CT7) / ∑CT<0.6, the light is effectively decomposed after passing through the fifth lens L5, the sixth lens L6, and the seventh lens L7 with negative focal length, so that the optical lens 100 has better resolving power, which is beneficial to improve the focusing of the optical lens 100.

[0066] Exemplarily, (CT5+CT6+CT7) / ∑CT can be 0.41-0.43, 0.42-0.44, 0.43-0.45, 0.44-0.46, 0.45-0.47, 0.46-0.48, 0.47-0.49, 0.48-0.50, 0.49-0.51, 0.50-0.52, 0.51-0.53, 0.52-0.54, 0.53-0.55, 0.54-0.56, 0.55-0.57, 0.56-0.58, 0.57-0.59, etc., for example, (CT5+CT6+CT7) / ∑CT can be 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, or 0.59, etc.

[0067] In some embodiments, the optical lens 100 satisfies the relationship: 0.3mm < CT2 < 0.5mm, and / or, 0.3mm < CT3 < 0.5mm, and / or, 0.5mm < CT1 < 1.1mm, and / or, 0.5mm < CT4 < 1.1mm, and / or, 0.5mm < CT5 < 1.1mm, and / or, 0.5mm < CT6 < 1.1mm, and / or, 0.5mm < CT7 < 1.1mm. Wherein, the thickness of the first lens L1 on the optical axis O is CT1, and the thickness of the fourth lens L4 on the optical axis O is CT4. In the optical lens 100, the second lens L2 and the third lens L3 adopt lenses with thinner center thickness, so that the light path is adjusted after passing through the first lens L1, the second lens L2 and the third lens L3, and finally the light passes through the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 in turn, as shown in Figure 2 Exemplarily, the collimation degree between the light paths is better. In Figure 3 and Figure 4 Exemplarily, the MTF values of the optical lens at the near focus of 1 meter and the far focus of 5 meters are obviously greater than the design value of 0.45 required by the conventional optical lens 100, so that the optical lens obtains good resolving power.

[0068] In addition, the first lens L1, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 adopt lenses with thicker thickness, which are not easy to deform in the production process, greatly reducing the difficulty of injection molding processing, so that the production yield of the lenses is higher, which is conducive to reducing the processing cost.

[0069] In some embodiments, the optical lens 100 satisfies: 0.60 <∑CT / TTL < 0.70. Wherein, TTL is the distance from the object side of the first lens L1 to the imaging surface of the optical lens 100 on the optical axis O. In other words, the length of the optical lens 100 on the optical axis O is greater than the sum of the center thicknesses of the respective lenses. It can be understood that there is a spacing 202b between the respective lenses when installed, so that the actual length of the optical lens 100 on the optical axis O is greater than the sum of the center thicknesses of the respective lenses. Since the value of∑CT / TTL is between 0.6-0.7, that is, the sum of the spacings 202b between the respective lenses accounts for 0.3-0.4 of the total length of the optical lens 100, the spacings 202b between the respective lenses are small, which is conducive to reducing the overall thickness of the optical lens 100, so as to facilitate the miniaturized design of the camera module 200.

[0070] Exemplarily,∑CT / TTL can be 0.61-0.63, 0.62-0.64, 0.63-0.65, 0.64-0.66, 0.65-0.67, 0.66-0.68, 0.67-0.69, etc. For example,∑CT / TTL can be 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68, or 0.69, etc.

[0071] In order to more clearly understand the technical solutions of the optical lens 100 in the present embodiment, an embodiment of the optical lens 100 is provided as follows, wherein the units of the curvature radius, the clear aperture, the thickness, and the distance in the table are all mm. Please refer to Table 1:

[0072] Table 1

[0073]

[0074] In the present embodiment, Table 2 also gives the conic coefficients and the high-order term coefficients of the respective aspherical surfaces in the present embodiment. Please refer to Table 2:

[0075] Table 2

[0076]

[0077]

[0078] In a second aspect, the present application also discloses a camera module 200, comprising an image sensor 201 and the optical lens 100 disclosed in the first aspect. Wherein, the image sensor 201 is arranged on the image side of the optical lens 100. It can be understood that the light enters from the object side of the optical lens 100, then passes through the optical lens 100 to reach the image sensor 201 for imaging.

[0079] The camera module 200 of the present application adopts the optical lens 100. Since the optical lens 100 has a short focusing stroke, the space for arranging the optical lens 100 in the camera module 200 can be reduced, thereby reducing the overall thickness of the camera module 200, and facilitating the miniaturization design of the camera module 200.

[0080] Please refer to Figure 5 In some embodiments, the camera module 200 further comprises a driving motor 202, which comprises a carrier 2021 and a spring piece 2022. The carrier 2021 has a receiving cavity 202a and carries the optical lens 100, and the spring piece 2022 is also arranged in the receiving cavity 202a and connects the carrier 2021 and the optical lens 100 in the radial direction of the optical axis O. The carrier 2021 is configured to drive the optical lens 100 to move along the optical axis O, and the spring piece 2022 is configured to drive the optical lens 100 to move along the optical axis O under the driving of the carrier 2021.

[0081] It can be understood that the carrier 2021 drives the optical lens 100 to move along the optical axis O by electromagnetic driving, thereby achieving focusing. The spring piece 2022 deforms to accumulate elastic force after the optical lens 100 moves, and provides a restoring force for the optical lens 100 to return to the original position after the carrier 2021 stops driving the optical lens 100 to move. In this way, the change of the focal length of the camera module 200 and the effective focal length adjustment are effectively realized.

[0082] Optionally, the outer circumferential surface of the optical lens 100 has a spacing 202b to the inner side wall of the receiving cavity 202a, the spring piece 2022 is located in the spacing 202b to block the spacing 202b, and a ventilation hole 202c is formed in the side surface of the spring piece 2022 in the direction of the optical axis O. On the one hand, the present application considers the dustproof effect inside the camera module 200 and the optical lens 100 provided by the present application has a lower requirement for the elastic force of the spring piece 2022, and the present application adopts a closed spring piece 2022 to cover the spacing 202b between the carrier 2021 and the optical lens 100, thereby preventing dust from falling into the camera module 200 during installation or use of the camera module 200. On the other hand, in order to maintain the balance of the air pressure inside and outside the camera module 200 to realize the effective movement of the spring piece 2022, the ventilation hole 202c is formed on the spring piece 2022 to maintain the balance of the air pressure inside and outside the camera module 200.

[0083] Considering the effective deformation of the spring 2022, the thickness of the spring 2022 can optionally be 50μm-100μm. For example, the thickness of the spring 2022 can be 50μm-55μm, 55μm-60μm, 60μm-65μm, 65μm-70μm, 70μm-75μm, 75μm-80μm, 80μm-85μm, 85μm-90μm, 90μm-95μm, 95μm-100μm, etc. For example, the thickness of the spring 2022 can be 50μm, 55μm, 60μm, 65μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, or 100μm, etc. This application controls the thickness of the spring 2022 to 50μm-100μm, so that the spring 2022 has good deformation capability, so that the spring 2022 can drive the optical lens 100 to move.

[0084] This application also considers the dustproof effect after the vent hole 202c is opened in the spring 2022. Optionally, the vent hole 202c can have an area of ​​0.2 mm². 2 -0.8mm 2 For example, the vent 202c may have an area of ​​0.20 mm². 2 -0.25mm 2 0.25mm 2 -0.30mm 2 0.30mm 2 -0.35mm 2 0.35mm 2 -0.40mm 2 0.40mm 2 -0.45mm 2 0.45mm 2 -0.50mm 2 0.50mm 2 -0.55mm 2 0.55mm 2 -0.60mm 2 0.60mm 2 -0.65mm 2 0.65mm 2 -0.70mm 2 0.70mm 2 -0.75mm 2 0.75mm 2 -0.80mm 2 For example, the vent area of ​​vent 202c can be 0.20 mm². 2 0.25mm 2 0.30mm 2 0.35mm2 0.4mm 2 0.45mm 2 0.50mm 2 0.55mm 2 0.60mm 2 0.65mm 2 0.70mm 2 0.75mm 2 or 0.80mm 2 and so on. The present application controls the hole area of the vent hole 202c to be 0.2mm 2 -0.8mm 2 In this way, the spring sheet 2022 can not only ensure the balance of the air pressure inside and outside the camera module 200, but also help to reduce the probability of dust entering the camera module 200.

[0085] Optionally, the vent hole 202c can be multiple, and the multiple vent holes 202c are arranged at intervals around the optical axis O. In order to improve the venting effect of the spring sheet 2022, multiple vent holes 202c can be arranged on the spring sheet 2022, which is conducive to the effective circulation of the gas inside and outside the camera module 200. Moreover, in order to prevent the wall vent hole 202c from being arranged too concentratedly and affecting the dustproof effect, the vent hole 202c can be arranged at intervals around the optical axis O, for example, as shown in the example, four vent holes 202c are arranged at the four corners of the spring sheet 2022 around the optical axis O, maintaining a certain interval distance, reducing the probability of dust falling into the vent hole 202c. Figure 6

[0086] In some embodiments, a gap (not shown) is provided between the spring sheet 2022 and the carrier 2021. The present application further improves the venting effect inside and outside the camera module 200 by providing a gap between the spring sheet 2022 and the carrier 2021.

[0087] Optionally, a gap is provided between the spring sheet 2022 and the optical lens 100. The present application further improves the venting effect inside and outside the camera module 200 by providing a gap between the spring sheet 2022 and the optical lens 100.

[0088] Optionally, the shape of the gap can be strip-shaped, wave-shaped, geometric-shaped, etc., which is not limited herein.

[0089] ​In some embodiments, the displacement of the optical lens 100 along the optical axis O can be 0-100 μm. Illustratively, the displacement of the optical lens 100 along the optical axis O can be 0-10 μm, 5-15 μm, 10-20 μm, 15-25 μm, 20-30 μm, 25-35 μm, 30-40 μm, 35-45 μm, 40-50 μm, 45-55 μm, 50-60 μm, 55-65 μm, 60-70 μm, 65-75 μm, 70-80 μm, 75-85 μm, 80-90 μm, 85-95 μm, 90-100 μm, etc., for example, the displacement of the optical lens 100 along the optical axis O can be 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, or 100 μm, etc. The focusing distance of the optical lens 100 disclosed in the present application is small, which reduces the occupation of the internal space of the camera module 200, thereby facilitating the miniaturization design of the camera module 200.

[0090] In a third aspect, referring to Figure 7 The present application also discloses an electronic device 300, which comprises a shell and the camera module 200 disclosed in the second aspect, and the camera module 200 is arranged in the shell. Illustratively, the electronic device 300 can be a mobile phone. By arranging the camera module 200 in the shell, the occupation of the internal space of the shell by the camera module 200 is reduced, thereby facilitating the miniaturization design of the mobile phone.

[0091] It can be understood that the electronic device 300 can also be a smart watch, a tablet computer, a notebook computer, etc.

[0092] The optical lens, the camera module, and the electronic device disclosed in the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the optical lens, the camera module, and the electronic device of the present application and the core idea thereof. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An optical lens (100), characterized in that, There are seven lenses with refractive power, the optical lens (100) comprises, in order from the object side to the image side along the optical axis (O): A first lens (L1) has positive refractive power, the object side surface of the first lens (L1) is convex at the near optical axis (O), the image side surface of the first lens (L1) is convex at the near optical axis (O); A second lens (L2) has negative refractive power, the object side surface of the second lens (L2) is convex at the near optical axis (O), the image side surface of the second lens (L2) is concave at the near optical axis (O); A third lens (L3) has negative refractive power, the object side surface of the third lens (L3) is concave at the near optical axis (O), the image side surface of the third lens (L3) is concave at the near optical axis (O); A fourth lens (L4) has positive refractive power, the object side surface of the fourth lens (L4) is convex at the near optical axis (O), the image side surface of the fourth lens (L4) is convex at the near optical axis (O); A fifth lens (L5) has negative refractive power, the object side surface of the fifth lens (L5) is concave at the near optical axis (O), the image side surface of the fifth lens (L5) is convex at the near optical axis (O); A sixth lens (L6) has negative refractive power, the object side surface of the sixth lens (L6) is concave at the near optical axis (O), the image side surface of the sixth lens (L6) is convex at the near optical axis (O); A seventh lens (L7) has negative refractive power, the object side surface of the seventh lens (L7) is concave at the near optical axis (O), the image side surface of the seventh lens (L7) is concave at the near optical axis (O); Wherein, the thickness of the second lens (L2) on the optical axis (O) is CT2, the thickness of the third lens (L3) on the optical axis (O) is CT3, the sum of the thicknesses of the first lens (L1) to the seventh lens (L7) on the optical axis (O) is ΣCT, the optical lens (100) satisfies the relationship: 0.10<(CT2+CT3) / ΣCT<0.

20.

2. The optical lens (100) according to claim 1, characterized in that, The optical lens (100) satisfies the following relationship: 0.8<CT2 / CT3<1.0, and / or, 0.4<(CT5+CT6+CT7) / ΣCT<0.6; Wherein, the thickness of the fifth lens (L5) on the optical axis (O) is CT5, the thickness of the sixth lens (L6) on the optical axis (O) is CT6, the thickness of the seventh lens (L7) on the optical axis (O) is CT7.

3. The optical lens (100) for according to claim 1, characterized in that, The optical lens (100) satisfies the relationship: 0.3mm < CT2 < 0.5mm, and / or, 0.3mm < CT3 < 0.5mm, and / or, 0.5mm < CT1 < 1.1mm, and / or, 0.5mm < CT4 < 1.1mm, and / or, 0.5mm < CT5 < 1.1mm, and / or, 0.5mm < CT6 < 1.1mm, and / or, 0.5mm < CT7 < 1.1mm; wherein, a thickness of the first lens (L1) on the optical axis (O) is CT1, a thickness of the fourth lens (L4) on the optical axis (O) is CT4, a thickness of the fifth lens (L5) on the optical axis (O) is CT5, a thickness of the sixth lens (L6) on the optical axis (O) is CT6, and a thickness of the seventh lens (L7) on the optical axis (O) is CT7.

4. The optical lens (100) according to claim 1, characterized in that, The optical lens (100) satisfies: 0.60 <∑CT / TTL < 0.70; wherein, TTL is a distance from an object side of the first lens (L1) to an imaging surface of the optical lens (100) on the optical axis (O).

5. The optical lens (100) according to claim 1, characterized in that, An effective half aperture radius of an image side of the second lens (L2) is SD22, and an effective half aperture radius of an object side of the third lens (L3) is SD31, and the SD22 and the SD31 satisfy a relationship: 0.9 < SD22 / SD31 < 1.

1.

6. A camera module (200), characterized in that, The optical lens (100) according to any one of claims 1-5; and An image sensor (201) is arranged on an image side of the optical lens (100). The camera module (200) includes a driving motor (202), the driving motor (202) includes a carrier (2021) and a spring piece (2022), the carrier (2021) has a receiving cavity (202a) to carry the optical lens (100), the spring piece (2022) is arranged in the receiving cavity (202a), the spring piece (2022) connects the carrier (2021) and the optical lens (100) in a radial direction of the optical axis (O), the carrier (2021) is configured to drive the optical lens (100) to move along the optical axis (O), and the spring piece (2022) is configured to drive the optical lens (100) to move along the optical axis (O) under the driving of the carrier (2021).

7. The camera module (200) of claim 6, wherein, A periphery of the optical lens (100) to an inner side wall of the receiving cavity (202a) has a gap (202b), the spring piece (2022) is located in the gap (202b) to block the gap (202b), and a side surface of the spring piece (2022) in the direction of the optical axis (O) is provided with a ventilation hole (202c).

8. The camera module (200) of claim 7, wherein, The spring piece (2022) includes two spring pieces (2022) arranged in the direction of the optical axis (O) at intervals.

9. The camera module (200) of claim 8, wherein, At least one spring piece (2022) blocks the gap (202b), and a side surface of the spring piece (2022) in the direction of the optical axis (O) is provided with the ventilation hole (202c). ​ 10. The camera module (200) of claim 8, wherein, The thickness of the elastic sheet (2022) is 50-100 μm; and / or The vent hole (202c) is multiple, and the multiple vent holes (202c) are arranged at intervals around the optical axis (O); and / or The vent hole (202c) has a hole area of 0.2mm 2 -0.8mm 2 .

11. The camera module (200) of claim 8, wherein, A gap is arranged between the elastic sheet (2022) and the carrier (2021) in the radial direction of the optical axis (O), and / or a gap is arranged between the elastic sheet (2022) and the optical lens (100).

12. The camera module (200) according to any one of claims 6-11, characterized in that, The displacement of the optical lens (100) along the optical axis (O) is 0-100 μm.

13. An electronic device (300), characterized by The camera module (200) according to any one of claims 6-12 is arranged in the shell.

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