Optical lens, camera module and electronic device

Abstract

The optical lens, the camera module and the electronic equipment disclosed by the application have five lenses with refractive power, the first lens to the third lens are a first lens group, the fourth lens and the fifth lens are a second lens group, the first lens group is fixed relative to an imaging surface of the optical lens, and the second lens group can move along an optical axis direction between the first lens group and the imaging surface of the optical lens; the first lens and the third lens have positive refractive power, the second lens and the fifth lens have negative refractive power, the object side surface of the first lens is a convex surface at a near optical axis, the object side surface of the second lens is a concave surface at the near optical axis, the image side surface of the third lens is a convex surface at the near optical axis, and the object side surface and the image side surface of the fifth lens are a concave surface and a convex surface at the near optical axis respectively; and the optical lens satisfies a relationship: 20°<FOV<30°. The optical lens, the camera module and the electronic equipment provided by the application can meet the miniaturization design and realize the focusing function.

Description

Technical Field

[0006] ,

[0005] , ,

[0001] The present invention relates to the field of optical imaging technology, and particularly to an optical lens, a camera module and an electronic device. Background Art

[0002] With the development of optical imaging technology, optical lenses are widely used in mobile electronic devices. At the same time, as mobile electronic devices show a trend of miniaturization, thinness and lightness, the requirements for the miniaturization design of optical lenses are also getting higher and higher. The traditional focusing method generally realizes focusing by moving the entire lens through a focusing motor to make the imaging surface coincide with the photosensitive surface of the photosensitive chip. Therefore, a sufficient large space (back focal distance) needs to be reserved between the lens and the photosensitive chip, making it difficult to achieve the miniaturization design of the camera module. Summary of the Invention

[0003] Embodiments of the present invention disclose an optical lens, a camera module and an electronic device, which can achieve the focusing function while meeting the miniaturization design.

[0004] To achieve the above object, in a first aspect, the present invention discloses an optical lens. The optical lens has a total of five lenses with refractive power. The five lenses are, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens; wherein, the first lens to the third lens form a first lens group, the fourth lens and the fifth lens form a second lens group, the first lens group is fixed relative to the imaging surface of the optical lens, and the second lens group can move along the optical axis direction between the first lens group and the imaging surface of the optical lens; the first lens has positive refractive power, and the object side surface of the first lens is convex near the optical axis; the second lens has negative refractive power, and the object side surface of the second lens is concave near the optical axis; the third lens has positive refractive power, and the image side surface of the third lens is convex near the optical axis; the fourth lens has refractive power; the fifth lens has negative refractive power, the object side surface of the fifth lens is concave near the optical axis, and the image side surface of the fifth lens is convex near the optical axis;

[0005] The optical lens satisfies the following relationship: 20° < FOV < 30°; where FOV is the maximum field of view angle of the optical lens.

[0006] The optical lens provided by the present invention adjusts the focusing clarity of the optical lens by setting the second lens group to move along the optical axis direction between the first lens group and the imaging surface, so that the total length of the optical lens remains unchanged during the focusing process, thereby meeting the miniaturization design of the optical lens while realizing the focusing function of the optical lens. Among them, the first lens has a positive refractive power, which is beneficial to shortening the optical total length of the optical lens, effectively converging light rays, and meeting the requirements of high image quality and miniaturization of the optical lens. The object side surface of the first lens is convex near the optical axis, which is beneficial to enhancing the positive refractive power of the first lens and further providing a reasonable light incident angle for the introduction of marginal light rays;;; The second lens has a negative refractive power, and the object side surface of the second lens is concave near the optical axis. When paired with the first lens having a positive refractive power, it is beneficial to slow down the change of light rays; The third lens has a positive refractive power, which can share the positive refractive power of the first lens, avoid excessive refractive power of a single lens, thereby being beneficial to reducing the sensitivity of the optical lens, and at the same time being beneficial to correcting the spherical aberration generated by the first lens and the second lens, and improving the imaging quality of the optical lens; The fifth lens has a negative refractive power, which is beneficial to correcting the aberration of the optical lens and at the same time is beneficial to shortening the optical total length of the optical lens to achieve the miniaturization design of the optical lens.

[0007] In addition, while reasonably configuring the refractive powers and surface shapes of the lenses in the first lens group and the second lens group, the optical lens satisfies the following relationship: 20° < FOV < 30°, so as to restrict the range of the maximum field angle of the optical lens, make the optical lens have a smaller field angle, so that the optical lens realizes the functions of small field of view and ultra-telephoto, thereby adapting to the shooting requirements at a long distance.

[0008] In a second aspect, the present invention discloses an imaging module, which includes a photosensitive chip and the optical lens as described in the first aspect above, and the photosensitive chip is disposed on the image side of the optical lens. The imaging module with the optical lens can realize the focusing function while meeting the miniaturization design.

[0009] In a third aspect, the present invention discloses an electronic device, which includes a housing and the imaging module as described in the second aspect above, and the imaging module is disposed in the housing. The electronic device with the imaging module can realize the focusing function while meeting the miniaturization design.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: An optical lens, a camera module and an electronic device provided by an embodiment of the present invention. The optical lens adopts five lenses with refractive power, and the first lens to the third lens are used as the first lens group, and the fourth lens and the fifth lens are used as the second lens group, so that the second lens can move along the optical axis direction between the first lens group and the imaging surface of the optical lens to adjust the focusing clarity of the optical lens, so that the total length of the optical lens remains unchanged during the focusing process, which is beneficial to realizing the focusing function of the optical lens while meeting the miniaturization design of the optical lens, and making the optical lens satisfy the relational expression: 20° < FOV < 30°, to constrain the range of the maximum field of view angle of the optical lens, so that the optical lens has a smaller field of view angle, so that the optical lens realizes the functions of small field of view and ultra-telephoto, so as to meet the shooting requirements for long distances. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 is a schematic structural diagram of the optical lens in the telephoto state disclosed in the first embodiment of the present application;

[0013] Figure 2 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens in the telephoto state disclosed in the first embodiment of the present application;

[0014] Figure 3 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens in the short-focus state disclosed in the first embodiment of the present application;

[0015] Figure 4 is a schematic structural diagram of the optical lens in the telephoto state disclosed in the second embodiment of the present application;

[0016] Figure 5 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens in the telephoto state disclosed in the second embodiment of the present application;

[0017] Figure 6 is the longitudinal spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical lens in the short-focus state disclosed in the second embodiment of the present application;

[0018] Figure 7This is a schematic diagram of the structure of the optical lens in the telephoto state disclosed in the third embodiment of this application;

[0019] Figure 8 The diagrams shown in the third embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the telephoto state.

[0020] Figure 9 The diagrams shown in the third embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the short focal length state.

[0021] Figure 10 This is a schematic diagram of the structure of the optical lens in the telephoto state disclosed in the fourth embodiment of this application;

[0022] Figure 11 The diagrams shown in the fourth embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the telephoto state.

[0023] Figure 12 The diagrams shown in the fourth embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the short focal length state.

[0024] Figure 13 This is a schematic diagram of the structure of the optical lens in the telephoto state as disclosed in the fifth embodiment of this application;

[0025] Figure 14 The diagrams shown in the fifth embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the telephoto state.

[0026] Figure 15 The diagrams shown in the fifth embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens in the short focal length state.

[0027] Figure 16 This is a schematic diagram of the camera module disclosed in this application;

[0028] Figure 17 This is a schematic diagram of the structure of the electronic device disclosed in this application. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1 According to a first aspect of this application, an optical lens 100 is disclosed. The optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 arranged sequentially along the optical axis O from the object side to the image side. The first lens L1, second lens L2, and third lens L3 form a first lens group, and the fourth lens L4 and fifth lens L5 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move along the optical axis between the first lens group and the imaging surface 101 of the optical lens 100, so that the total length of the optical lens 100 remains constant during focusing. This facilitates the miniaturization design of the optical lens 100 while achieving its focusing function. During imaging, light rays enter sequentially from the object side of the first lens L1 through the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5, and are finally imaged onto the imaging surface 101 of the optical lens 100.

[0031] Furthermore, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has refractive power (e.g., positive or negative refractive power), and the fifth lens L5 has negative refractive power. Furthermore, the object-side surface S1 of the first lens L1 can be convex near the optical axis O, the image-side surface S2 of the first lens L1 can be either convex or concave near the optical axis O, the object-side surface S3 of the second lens L2 can be concave near the optical axis O, the image-side surface S4 of the second lens L2 can be either convex or concave near the optical axis O, the object-side surface S5 of the third lens L3 can be either convex or concave near the optical axis O, the image-side surface S6 of the third lens L3 can be convex near the optical axis O, the object-side surface S7 of the fourth lens L4 can be either convex or concave near the optical axis O, the image-side surface S8 of the fourth lens L4 can be either convex or concave near the optical axis O, the object-side surface S9 of the fifth lens L5 can be concave near the optical axis O, and the image-side surface S10 of the fifth lens L5 can be convex near the optical axis O.

[0032] In the optical lens 100 of this application, the first lens L1 has positive refractive power, which is beneficial for shortening the overall optical length of the optical lens 100, effectively converging light, and meeting the requirement of high image quality and miniaturization of the optical lens 100. The object-side surface S1 of the first lens L1 is convex near the optical axis, which is beneficial for enhancing the positive refractive power of the first lens L1 and further providing a reasonable light incident angle for the introduction of edge light. The second lens L2 has negative refractive power, and the object-side surface S3 of the second lens L2 is concave near the optical axis, which complements the first lens L1 with positive refractive power. It helps to mitigate changes in light; the third lens L3 has positive refractive power, which can share the positive refractive power of the first lens L1, avoiding excessive refractive power of a single lens, thereby helping to reduce the sensitivity of the optical lens 100, and also helping to correct the spherical aberration generated by the first lens L1 and the second lens L2, improving the imaging quality of the optical lens 100; the fifth lens L5 has negative refractive power, which helps to correct the aberrations of the optical lens 100, and also helps to shorten the total optical length of the optical lens 100, so as to achieve the miniaturization design of the optical lens 100.

[0033] In some embodiments, the optical lens 100 can be applied to electronic devices such as smartphones and tablets. The first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be made of plastic, thus enabling the optical lens 100 to have both good optical performance and good portability. Furthermore, plastic is easier to process, thereby reducing the manufacturing cost of the optical lens.

[0034] In some embodiments, at least one lens in the optical lens 100 may also be made of glass. Lenses made of glass can withstand high or low temperatures and have excellent optical performance and better stability. In some embodiments, the optical lens 100 may also be provided with at least two lenses of different materials, such as a combination of glass lenses and plastic lenses. However, the specific configuration relationship can be determined according to actual needs and will not be exhaustively listed here.

[0035] In some embodiments, the optical lens 100 further includes a filter L6. The filter L6 is disposed between the image side S10 of the fifth lens L5 and the imaging surface 101 of the optical lens 100. The fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group, and the second lens group can be moved integrally relative to the first lens group along the optical axis direction. Exemplarily, the filter L6 can be an infrared cut-off filter. The infrared cut-off filter is disposed between the fifth lens L5 and the imaging surface 101 of the optical lens 100, so as to filter out light of other wavelength bands such as infrared light, and only allow visible light to pass through, making the imaging more in line with the visual experience of the human eye. Alternatively, the filter L6 can also be an infrared band-pass filter. The infrared band-pass filter allows infrared light within the expected wavelength range to pass through, while light of other wavelengths outside the range will be filtered out and cannot pass through, thereby avoiding interference light from affecting the normal imaging of infrared light and improving the imaging quality in low light conditions.

[0036] In some embodiments, the optical lens 100 further includes an aperture stop 102. The aperture stop 102 can be an aperture diaphragm or a field stop, and it can be disposed between the object side of the optical lens 100 and the object side surface S1 of the first lens L1. It can be understood that in other embodiments, the aperture stop 102 can also be disposed between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3, or the aperture stop 102 can also be disposed between the first lens L1 and the second lens L2. The specific setting can be adjusted according to the actual situation, and this embodiment does not make specific limitations on this.

[0037] In some embodiments, the optical lens 100 satisfies the relationship: 20° < FOV < 30°. Where FOV is the maximum field angle of the optical lens 100. Specifically, FOV can be 20.15°, 21.6°, 22.7°, 24.8°, 26.6°, 28.13°, or 29.07°, etc. By restricting the range of the maximum field angle of the optical lens 100, the optical lens 100 has a smaller field angle, so that the optical lens 100 can achieve the functions of small field of view and ultra-telephoto, thus meeting the shooting requirements for long distances. Preferably, 21.3° ≤ FOV ≤ 27.1°.

[0038] In some embodiments, the optical lens 100 satisfies the relational expression: 0.7 < DLmax / TTL < 0.8. Here, DLmax is the maximum distance on the optical axis O from the object side surface S1 of the first lens L1 to the image side surface S10 of the fifth lens L5, and TTL is the distance on the optical axis O from the object side surface S1 of the first lens L1 to the imaging surface 101 of the optical lens 100, that is, the total length of the optical lens 100. Specifically, DLmax / TTL can be 0.708, 0.713, 0.731, 0.747, 0.766, 0.779, 0.796, etc. When the above relational expression is satisfied, it is beneficial to improve the layout rationality of the optical lens 100. On the basis of realizing the miniaturized design of the optical lens 100, the space occupied by the first lens group and the second lens group is reduced, sufficient space is reserved for the focusing of the optical lens 100 under different object distance conditions, so that the optical lens 100 can save manufacturing costs and achieve a horizontal layout while realizing the internal focusing function. Preferably, 0.729 ≤ DLmax / TTL ≤ 0.78.

[0039] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.95 < TTL / fmax < 1.1. Here, fmax is the maximum focal length of the optical lens 100. Specifically, TTL / fmax can be 0.985, 1.017, 1.033, 1.058, 1.074, 1.095, etc. When the above relational expression is satisfied, the ratio between the total length of the optical lens 100 and the maximum focal length of the optical lens 100 can be restricted, which is beneficial to reducing the optical total length of the optical lens 100 to realize the miniaturized design of the optical lens 100, so as to facilitate the implantation of the optical lens 100 into small and convenient mobile electronic devices. At the same time, it is beneficial to reasonably configure the maximum focal length of the optical lens 100, so that the optical lens 100 has a better telephoto effect. Preferably, 0.989 ≤ TTL / fmax ≤ 1.051.

[0040] In some embodiments, the optical lens 100 satisfies the following relationship: 0.4 < AT12 / AT23 < 3.5. Here, AT12 is the air gap on the optical axis O between the image side S2 of the first lens L1 and the object side S3 of the second lens L2, and AT23 is the air gap on the optical axis O between the image side S4 of the second lens L2 and the object side S5 of the third lens L3. Specifically, AT12 / AT23 can be 0.407, 0.41, 0.55, 0.6, 1.23, 1.36, 1.75, 2.3, 2.5, 3.177, 3.466, 3.498, etc. When the above relationship is satisfied, it is beneficial to reasonably arrange the distances between the first lens L1, the second lens L2, and the third lens L3, so that the structure of the first lens group is more stable and reliable. At the same time, it is beneficial to delay the deflection angle of the incident light, reduce the amount of aberration introduced by the light passing through the first lens L11, and is beneficial to the displacement and focusing of the second lens group. Preferably, 0.41 ≤ AT12 / AT23 ≤ 3.466.

[0041] In some embodiments, the optical lens 100 satisfies the following relationship: 2.3 mm < AT34max - AT34min < 2.6 mm. Here, AT34max is the maximum air gap on the optical axis O between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4 (i.e., the distance between the first lens group and the second lens group on the optical axis O when the optical lens 100 is in the short focal state), and AT34min is the minimum air gap on the optical axis O between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4 (i.e., the distance between the first lens group and the second lens group on the optical axis O when the optical lens 100 is in the long focal state). Specifically, AT34max - AT34min can be 2.33 mm, 2.36 mm, 2.40 mm, 2.46 mm, 2.5 mm, 2.53 mm, 2.58 mm, etc. When the above relationship is satisfied, it is beneficial to reasonably arrange the sizes and refractive powers of the first lens group and the second lens group. At the same time, it can control the displacement amount of the second lens group when switching between the long focal state and the short focal state, reduce the movement stroke of the second lens group, and ensure that the motor can meet the displacement amount of the second lens group. Preferably, 2.4 mm ≤ AT34max - AT34min ≤ 2.5 mm.

[0042] In some embodiments, the optical lens 100 satisfies the following relationship: 0.45 < (AT23 + AT45) / AT34max < 1. Here, AT23 is the air gap on the optical axis O between the image side surface S4 of the second lens L2 and the object side surface S5 of the third lens L3, AT34max is the air gap on the optical axis O between the image side surface S6 of the third lens L3 and the object side surface S7 of the fourth lens L4, and AT45 is the air gap on the optical axis O between the image side surface S8 of the fourth lens L4 and the object side surface S9 of the fifth lens L5. Specifically, (AT23 + AT45) / AT34max can be 0.454, 0.499, 0.597, 0.666, 0.781, 0.866, 0.888, 0.971, etc. When the above relationship is satisfied, it is beneficial to keep the incident angle and the exit angle of the marginal rays small, slow down the deflection angle of the rays, thereby being beneficial to reducing the generation of astigmatism and improving the imaging quality of the optical lens 100. Preferably, 0.499 ≤ (AT23 + AT45) / AT34max ≤ 0.888.

[0043] In some embodiments, the optical lens 100 satisfies the following relationship: 0.1 < AT45 / TDmin < 0.2. Here, AT45 is the air gap on the optical axis O between the image side surface S8 of the fourth lens L4 and the object side surface S9 of the fifth lens L5, and TDmin is the minimum distance on the optical axis O between the object side surface S1 of the first lens L1 and the image side surface S10 of the fifth lens L5. Specifically, AT45 / TDmin can be 0.114, 0.127, 0.144, 0.155, 0.131, 0.170, 0.173, 0.173, 0.181, 0.187, 0.189, 0.196, 0.198. When the above relationship is satisfied, it is beneficial to achieve a reasonable spatial layout of each lens, thereby controlling the total length of the optical lens 100 and realizing the miniaturized design of the optical lens 100, while being beneficial to the molding process of each lens, ensuring that there are as many air gaps as possible between each lens, so as to facilitate the smooth exit of the incident light. Preferably, 0.144 ≤ AT45 / TDmin ≤ 0.187.

[0044] In some embodiments, the optical lens 100 satisfies the following relationship: 0.4 < ∑ATmin / TDmin < 0.7. Wherein, ∑ATmin is the sum of the air gaps between adjacent lenses on the optical axis O among the first lens L1 to the fifth lens L5, and TDmin is the minimum distance on the optical axis O from the object-side surface S1 of the first lens L1 to the image-side surface S10 of the fifth lens L5. Specifically, ∑ATmin / TDmin can be 0.400, 0.434, 0.488, 0.517, 0.606, 0.663, or 0.694, etc. Satisfying the above relationship facilitates a reasonable spatial arrangement of the lenses, thereby controlling the total length of the optical lens 100, achieving a miniaturized design of the optical lens 100, and facilitating the molding and processing of each lens, ensuring that there are as many air gaps as possible between the lenses to facilitate the smooth exit of incident light. Preferably, 0.4 ≤ ∑ATmin / TDmin ≤ 0.663.

[0045] In some embodiments, the optical lens 100 satisfies the following relationship: |SAG22 / AT45| < 0.15. Wherein, SAG22 is the distance in the direction parallel to the optical axis O between the maximum effective aperture of the image-side surface S4 of the second lens L2 and the intersection of the image-side surface S4 of the second lens L2 and the optical axis O (i.e., the sag of the image-side surface of the second lens L2), and AT45 is the air gap between the fourth lens L4 and the fifth lens L5 on the optical axis O. Specifically, |SAG22 / AT45| can be 0.003, 0.045, 0.055, 0.073, 0.087, 0.098, 0.113, 0.137, or 0.144, etc. Satisfying the above relationship helps to reasonably constrain the sag of the image-side surface S4 of the second lens L2, effectively distribute the optical deflection angle borne by each lens, and improve off-axis field-of-view astigmatism. Preferably, 0.003 ≤ |SAG22 / AT45| ≤ 0.113.

[0046] In some embodiments, the optical lens 100 satisfies the following relationship: |SAG42 / AT45| < 0.3. Wherein, AT45 is the air gap between the fourth lens L4 and the fifth lens L5 on the optical axis O, and SAG42 is the distance in a direction parallel to the optical axis O between the maximum effective aperture of the image-side surface S8 of the fourth lens L4 and the intersection of the image-side surface S8 of the fourth lens L4 and the optical axis O (i.e., the sag of the image-side surface of the fourth lens L4). Specifically, |SAG42 / AT45| can be 0.034, 0.054, 0.079, 0.101, 0.140, 0.188, 0.203, 0.244, or 0.279, etc. Satisfying the above relationship helps to reasonably constrain the sag of the image-side surface S8 of the fourth lens L4, effectively distribute the optical deflection angle borne by each lens, and improve off-axis field-of-view astigmatism. Preferably, 0.079 ≤ |SAG42 / AT45| ≤ 0.244.

[0047] In some embodiments, the optical lens 100 satisfies the following relationship: 0.3 < |SAG51 / AT45| < 0.6. Where AT45 is the air gap between the fourth lens L4 and the fifth lens L5 on the optical axis O, and SAG51 is the distance in a direction parallel to the optical axis O between the maximum effective aperture of the object-side surface S9 of the fifth lens L5 and the intersection of the object-side surface S9 of the fifth lens L5 and the optical axis O (i.e., the sag of the object-side surface of the fifth lens L5). Specifically, |SAG51 / AT45| can be 0.314, 0.382, 0.403, 0.462, 0.479, 0.514, 0.579, 0.587, or 0.597, etc. Satisfying the above relationship helps to reasonably constrain the sag of the object-side surface S9 of the fifth lens L5, effectively distribute the optical deflection angle borne by each lens, and improve off-axis field-of-view astigmatism. Preferably, 0.382 ≤ |SAG511 / AT45| ≤ 0.562.

[0048] In some embodiments, the optical lens 100 satisfies the following relationship: 0.75 < |F123 / F45| < 1. Where F123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3; F45 is the combined focal length of the fourth lens L4 and the fifth lens L5; and fmax is the maximum focal length of the optical lens 100. Specifically, |F123 / F45| can be 0.754, 0.756, 0.784, 0.858, 0.906, 0.945, or 0.966, etc. Satisfying the above relationship facilitates the rational configuration of the refractive power of the first and second lens groups, avoids large spherical aberration in the first lens group, helps the second lens group correct aberrations introduced by the first lens group, improves the overall resolving power of the optical lens 100, and also facilitates the compression of the distance between the first and second lens groups at different object distances, forming a short-stroke internal focusing method, ensuring that the motor can meet the displacement of the second lens group. Preferably, 0.756 ≤ |F123 / F45| ≤ 0.945.

[0049] In some embodiments, the optical lens 100 satisfies the following relationship: F123 > 0 mm. Here, F123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3. Specifically, F123 can be 8.017 mm, 8.213 mm, 8.479 mm, 8.668 mm, 8.750 mm, or 8.975 mm, etc. Satisfying the above relationship means that the first lens group has positive refractive power, which helps to avoid large spherical aberration in the first lens group, thereby improving the overall resolving power of the optical lens 100, and also enhances the light-gathering capability of the optical lens 100.

[0050] In some embodiments, the optical lens 100 satisfies the following relationship: F45 < 0. Here, F45 is the combined focal length of the fourth lens L4 and the fifth lens L5. Specifically, F45 can be -12.303mm, -11.597mm, -11.566mm, -10.479mm, -9.996mm, -8.710mm, -8.442mm, or -8.007mm, etc. Satisfying the above relationship means that the second lens group has negative refractive power, which is beneficial for the second lens group to move along the optical axis O to balance the aberrations introduced by the first lens group.

[0051] In some embodiments, the optical lens 100 satisfies the following relationship: 0.4 < |F123 / fmax| < 0.6. Where F123 is the combined focal length of the first lens L1, the second lens L2, and the third lens L3, and fmax is the maximum focal length of the optical lens 100. Specifically, |F123 / fmax| can be 0.454, 0.505, 0.520, 0.545, 0.567, 0.577, 0.581, or 0.595, etc. Satisfying the above relationship facilitates the rational configuration of the refractive power of the first lens L1, reduces the aberration introduced by the first lens group, avoids unbalanced spherical aberration in the first lens group, thereby improving the resolving power and imaging quality of the optical lens 100. It also helps to shorten the overall length of the optical lens 100, achieving a miniaturized design. Preferably, 0.520 ≤ |F1123 / fmax| ≤ 0.577.

[0052] In some embodiments, the optical lens 100 satisfies the following relationship: 0.5 < |F45 / fmax| < 0.8. Where F45 is the combined focal length of the fourth lens L4 and the fifth lens L5, and fmax is the maximum focal length of the optical lens 100. Specifically, |F45 / fmax| can be 0.502, 0.611, 0.688, 0.708, 0.715, 0.723, 0.734, or 0.789, etc. Satisfying the above relationship facilitates the rational configuration of the refractive power of the second lens group, helps the second lens group balance the aberrations generated by the first lens group, promotes aberration balance in the optical lens 100, improves the imaging quality of the optical lens 100, and also helps to shorten the overall length of the optical lens 100, achieving a miniaturized design. Preferably, 0.611 ≤ |F45 / fmax| ≤ 0.723.

[0053] In some embodiments, the optical lens 100 satisfies the following relationship: 0.3 < ET1 / CT1 < 0.7. Here, ET1 is the distance in the direction of the optical axis O from the maximum effective aperture of the object side S1 of the first lens L1 to the maximum effective aperture of the image side S2 of the first lens L1 (i.e., the edge thickness of the first lens L1), and CT1 is the thickness of the first lens L1 on the optical axis O (i.e., the center thickness of the first lens L1). Specifically, ET1 / CT1 can be 0.353, 0.404, 0.432, 0.518, 0.584, 0.627, 0.663, 0.680, 0.696, etc. When the above relationship is satisfied, the ratio of the edge thickness to the center thickness of the first lens L1 can be controlled within a reasonable range, which is beneficial to the convergence of incident light, and is also beneficial to the processing and forming of the first lens L1, reduces the processing difficulty of the first lens L1, and ensures the manufacturing quality and yield of the optical lens 100. Preferably, 0.432 ≤ ET1 / CT1 ≤ 0.663.

[0054] In some embodiments, the optical lens 100 satisfies the following relationship: 0.3 < |SAG11| + |SAG12| / CT1 < 0.6. Here, SAG11 is the distance in the direction parallel to the optical axis O between the maximum effective aperture of the object side S1 of the first lens L1 and the intersection of the object side S1 of the first lens L1 and the optical axis O (i.e., the sag of the object side of the first lens L1), SAG12 is the distance in the direction parallel to the optical axis O between the maximum effective aperture of the image side S2 of the first lens L1 and the intersection of the image side S2 of the first lens L1 and the optical axis O (i.e., the sag of the image side of the first lens L1), and CT1 is the thickness of the first lens L1 on the optical axis O (i.e., the center thickness of the first lens L1). Specifically, |SAG11| + |SAG12| / CT1 can be 0.305, 0.337, 0.368, 0.372, 0.406, 0.416, 0.546, 0.566, 0.594, etc. When the above relationship is satisfied, it is beneficial to control the ratio of the sum of the sags of the object side S1 and the image side S2 of the first lens L1 to the center thickness of the first lens L1 within a reasonable range, which is beneficial to the convergence of incident light, and at the same time is beneficial to restricting the refractive power and thickness of the first lens L1, avoiding the first lens L1 being too thin or too thick, and thus is beneficial to the manufacturing and processing of the first lens L1. Preferably, 0.337 ≤ |SAG11| + |SAG12| / CT1 ≤ 0.546.

[0055] In some embodiments, the optical lens 100 satisfies the following relationship: 0.3 < ET3 / CT3 < 0.5. Here, ET3 is the distance in the optical axis O direction from the maximum effective aperture of the object side S5 of the third lens L3 to the maximum effective aperture of the image side S6 of the third lens L3, and CT3 is the thickness of the third lens L3 on the optical axis O (i.e., the central thickness of the third lens L3). Specifically, ET3 / CT3 can be 0.328, 0.382, 0.412, 0.448, 0.474, 0.482, 0.491, etc. When the above relationship is satisfied, it is beneficial to control the refractive power of the third lens L3 within a suitable range, beneficial to correcting the aberration introduced by the first lens group, and at the same time avoiding an overly large aperture of the second lens group to meet the miniaturization design requirements of the optical lens 100. Preferably, 0.368 ≤ ET3 / CT3 ≤ 0.479.

[0056] In some embodiments, the optical lens 100 satisfies the following relationship: (ET2 + ET3) / (CT2 + CT3) < 1. Here, ET2 is the distance in the optical axis O direction from the maximum effective aperture of the object side S3 of the second lens L2 to the maximum effective aperture of the image side S4 of the second lens L2, ET3 is the distance in the optical axis O direction from the maximum effective aperture of the object side S3 of the third lens L3 to the maximum effective aperture of the image side S6 of the third lens L3, CT2 is the thickness of the second lens L2 on the optical axis O (i.e., the central thickness of the second lens L2), and CT3 is the thickness of the third lens L3 on the optical axis O (i.e., the central thickness of the third lens L3). Specifically, (ET2 + ET3) / (CT2 + CT3) can be 0.707, 0.749, 0.807, 0.842, 0.857, 0.901, 0.939, 0.966, 0.987, etc. When the above relationship is satisfied, that is, the sum of the edge thicknesses of the second lens L2 and the third lens L3 is less than the sum of the central thicknesses of the second lens L2 and the third lens L3, it is beneficial to make the large-angle incident light smoother and then extend outward through the fourth lens L4. Thus, it is beneficial to make the lens surface shapes of the lenses in the first lens group simple with small variation amounts, beneficial to reducing the manufacturing difficulty and tolerance sensitivity of each lens in the first lens group, and at the same time the amount of aberration introduced by the first lens group is controllable, reducing the pressure on the second lens group to correct aberration. Preferably, 0.749 ≤ (ET2 + ET3) / (CT2 + CT3) ≤ 0.939.

[0057] In some embodiments, the optical lens 100 satisfies the following relationship: 0.2 < |R21 / fmax| < 0.5. Wherein, R21 is the radius of curvature of the object-side surface of the second lens L2 at the optical axis O, and fmax is the maximum focal length of the optical lens 100. Specifically, |R21 / fmax| can be 0.211, 0.317, 0.361, 0.371, 0.401, 0.446, or 0.496, etc. Satisfying the above relationship is beneficial for rationally configuring the refractive power of the second lens L2 and the radius of curvature of the object-side surface of the second lens L2 at the optical axis O, reducing the surface complexity of the second lens L2, suppressing field curvature and astigmatism, improving the imaging quality of the optical lens 100, and also reducing the molding difficulty of the second lens L2. Preferably, 0.317 ≤ |R21 / fmax| ≤ 0.373.

[0058] In some embodiments, the optical lens 100 satisfies the following relationship: 0.1 < |R51 / fmax| < 0.2. Wherein, R51 is the radius of curvature of the object-side surface S9 of the fifth lens L5 at the optical axis O, and fmax is the maximum focal length of the optical lens 100. Specifically, |R51 / fmax| can be 0.131, 0.160, 0.167, 0.171, 0.183, 0.194, or 0.196, etc. Satisfying the above relationship facilitates the rational configuration of the refractive power of the fifth lens L5 and the radius of curvature of the object-side surface S9 of the fifth lens L5 at the optical axis O, reduces the surface complexity of the fifth lens L5, suppresses field curvature and astigmatism, improves the imaging quality of the optical lens 100, and also helps to reduce the molding difficulty of the fifth lens L5, effectively controls the back focal length of the optical lens 100, and avoids excessive overall length of the optical lens 100. Preferably, 0.160 ≤ |R51 / fmax| ≤ 0.183.

[0059] In some embodiments, the optical lens 100 satisfies the following relationship: (n1+n2) / 2n1>1. Wherein, n1 is the refractive index of the first lens L1, and n2 is the refractive index of the second lens L2. Specifically, (n1+n2) / 2n1 can be 1.011, 1.014, 1.038, 1.177, 2.059, or 2.866, etc. Satisfying the above relationship facilitates the rational distribution of the refractive power of the first lens L1 and the second lens L2, thereby minimizing chromatic aberration and spherical aberration, improving the imaging quality of the optical lens 100, enhancing the light-gathering capability of the optical lens 100, and also facilitating the reduction of the size of the optical lens 100, achieving a miniaturized design.

[0060] In some embodiments, the optical lens 100 satisfies the following relationship: |V2-V1|>25. Wherein, V2 is the Abbe number of the second lens L2, and V1 is the Abbe number of the first lens L1. Specifically, |V2-V1| can be 25.5, 26.5, 27.5, 29.5, 32, 35.5, or 40.5, etc. When the above relationship is satisfied, the materials used to manufacture the first lens L1 and the second lens L2 have different dispersion coefficients, making the combination of the first lens L1 and the second lens L2 beneficial for correcting the chromatic aberration of the optical lens 100 and improving the imaging performance of the optical lens 100.

[0061] In some embodiments, the image-side surface of the fifth lens has one and only one critical point, which is located at the intersection of the image-side surface of the fifth lens and the optical axis. That is, the most convex point of the image-side surface S10 of the fifth lens L5 is located at the intersection of the image-side surface S10 of the fifth lens L5 and the optical axis O, and the image-side surface S10 of the fifth lens L5 is convex. This helps to ensure the smoothness of the fifth lens L5, reduce distortion, and lower the sensitivity of the fifth lens L5, thereby facilitating the forming and processing of the fifth lens L5.

[0062] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0063] First Embodiment

[0064] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of this application is shown below. Figure 1 As shown, the optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 to the third lens L3 form a first lens group, and the fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move between the first lens group and the imaging surface 101 along the optical axis O. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be found in the specific embodiments described above, and will not be repeated here.

[0065] Furthermore, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, and the fifth lens L5 has negative refractive power. Even further, the object-side surface S1 and image-side surface S2 of the first lens L1 are convex and concave near the optical axis O, respectively; the object-side surface S3 and image-side surface S4 of the second lens L2 are concave and convex near the optical axis O, respectively; the object-side surface S5 and image-side surface S6 of the third lens L3 are concave and convex near the optical axis O, respectively; the object-side surface S7 and image-side surface S8 of the fourth lens L4 are both convex near the optical axis O; and the object-side surface S9 and image-side surface S10 of the fifth lens L5 are concave and convex near the optical axis O, respectively.

[0066] Understandably, the distance between the first lens group and the second lens group, and the distance between the second lens group and the imaging plane 101, are inconsistent in different states of the optical lens 100. Taking the distance from the object plane to the object-side surface S1 of the first lens L1 as the object distance OBJ, the distance from the image-side surface S6 of the third lens L3 to the object-side surface S7 of the fourth lens L4 on the optical axis O as D1, and the distance from the filter L6 to the imaging plane 101 of the optical lens 100 on the optical axis O as D2, under different object distance conditions, by adjusting the position of the second lens group, the focal length of the optical lens 100 can be adjusted to achieve high-quality imaging at different object distances. The optical lenses 100 in the following embodiments also have short focal length and long focal length states so that the optical lens 100 can achieve shooting at different object distances.

[0067] Specifically, taking the focal length f of optical lens 100 as 14.26mm to 9.52mm, the maximum field of view FOV of optical lens 100 as 27.1° to 24.5°, the total optical length TTL of optical lens 100 as 14.1mm, and the aperture number FNO as 3.5 to 3.7 as examples, other parameters of optical lens 100 are given in Table 1 below. The elements along the optical axis O of optical lens 100 from the object side to the image side are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 2 and 3 correspond to the object side S1 and image side S2 of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the object side or image side of the corresponding surface number near the optical axis O. The first value in the "Thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side surface of the lens to the rear surface on the optical axis O. The value in the "Thickness" parameter column of the aperture 102 is the distance from the aperture 102 to the vertex of the rear surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object-side surface S1 of the first lens L1 to the image-side surface of the last lens is the positive direction of the optical axis O. When this value is negative, it indicates that the aperture 102 is set on the image-side of the vertex of the rear surface. If the thickness of the aperture 102 is positive, the aperture 102 is on the object-side of the vertex of the rear surface. It can be understood that the units for the Y-radius, thickness, and focal length in Table 1 are all mm, and the reference wavelength for the refractive index and Abbe number of each lens in Table 1 is 587.6 nm, and the reference wavelength for the focal length is 555 nm.

[0068] Table 1

[0069]

[0070] Table 2 shows the distance D1 (i.e., the air gap AT34 between the third lens L3 and the fourth lens L4) on the optical axis O, and the distance D2 (from the filter L6 to the imaging plane 101 of the optical lens 100) on the optical axis O, for the optical lens 100 under different object distances OBJ in the first embodiment. It should be understood that the unit of maximum field of view (FOV) in Table 2 is °, and the units of focal length f, object distance OBJ, D1, D2, and TTL of the optical lens 100 in Table 2 are all mm.

[0071] Table 2

[0072] First Embodiment OBJ D1 D2 FOV f FNO TTL Telephoto mode unlimited 1.167 5.590 27.1 14.26 3.7 14.1 Short focal length 50 3.667 3.091 24.5 9.52 3.5 14.1

[0073] In the first embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the fifth lens L5 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0074]

[0075] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the Y radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient corresponding to the i-th higher-order term of the aspherical surface. Table 3 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A26, A28 and A30 that can be used for the various aspherical lenses S1-S10 in the first embodiment.

[0076] Table 3

[0077]

[0078] Please see Figure 2 and Figure 3 (A) in the middle Figure 2 and Figure 3 Figure (A) shows longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.00 nm, 610.00 nm, 555.00 nm, 510.00 nm, and 470.00 nm, respectively, in both telephoto and short-focal-length states. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 and Figure 3 As can be seen from (A) in the first embodiment, the optical lens 100 has better spherical aberration values ​​in both telephoto and short-focal-length states, indicating that the optical lens 100 in this embodiment has better imaging quality.

[0079] Please see Figure 2 and Figure 3 (B) in the middle Figure 2 and Figure 3 Figure (B) shows the astigmatism curves of the optical lens 100 in the first embodiment at a wavelength of 555 nm in both telephoto and short-focal-length states. The horizontal axis along the X-axis represents the focus shift in mm, and the vertical axis along the Y-axis represents the image height in mm. In the astigmatism curves, T represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 2 and Figure 3 As can be seen from (B) in the figure, at this wavelength, the astigmatism of the optical lens 100 in both telephoto and short-focal-length states is well compensated.

[0080] Please see Figure 2 and Figure 3 (C) in the middle, Figure 2 and Figure 3 Figure (C) shows the distortion curves of the optical lens 100 in the first embodiment at a wavelength of 555 nm in both telephoto and short-focal-length states. The horizontal axis along the X-axis represents distortion in %, and the vertical axis along the Y-axis represents image height in mm. Figure 2 and Figure 3 As can be seen from (C), at this wavelength, the distortion of the optical lens 100 in both telephoto and short-focal-length states is well corrected.

[0081] Second Embodiment

[0082] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of the optical lens 100 according to the second embodiment of this application. The optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6 arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 to the third lens L3 form a first lens group, and the fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move between the first lens group and the imaging surface 101 along the optical axis O. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be found in the specific embodiments described above, and will not be repeated here.

[0083] Furthermore, in the second embodiment, the refractive power of each lens differs from that of each lens in the first embodiment in that the fourth lens L4 has a negative refractive power. In the second embodiment, the surface shape of each lens differs from that of each lens in the first embodiment in that the image-side surface S2 of the first lens L1 is convex near the optical axis O, the image-side surface S4 of the second lens L2 is concave near the optical axis O, the object-side surface S5 of the third lens L3 is convex near the optical axis O, and the image-side surface S8 of the fourth lens L4 is concave near the optical axis O.

[0084] Specifically, taking the focal length f of optical lens 100 as 14.57mm to 10.39mm, the maximum field of view (FOV) of optical lens 100 as 26.9° to 25.5°, the total optical length (TTL) of optical lens 100 as 15.31mm, and the aperture number (FNO) as 3 to 3.2 as examples. Other parameters in the second embodiment are given in Tables 4, 5, and 6 below, and the definitions of each parameter can be derived from the descriptions of the aforementioned embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and focal length in Table 4 are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 4 is 587.6nm, and the reference wavelength for the focal length is 555nm. In Table 5, the unit for the maximum field of view (FOV) is °, and the units for focal length f, object distance OBJ, D1, D2, and TTL are all mm.

[0085] Table 4

[0086]

[0087]

[0088] Table 5

[0089] Second Embodiment OBJ D1 D2 FOV f FNO TTL Telephoto mode unlimited 1.046 5.630 26.9 14.57 3.2 15.31 Short focal length 50 3.446 3.230 25.5 10.39 3 15.31

[0090] Table 6

[0091]

[0092]

[0093] Please see Figure 5 and Figure 6 ,Depend on Figure 5 and Figure 6 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism curve diagram, and (C) the distortion curve diagram, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled in both telephoto and short-focal-length settings, thus the optical lens 100 of this embodiment possesses good image quality. Furthermore, regarding... Figure 5 and Figure 6 The wavelengths corresponding to the curves in (A) longitudinal spherical aberration plot, (B) astigmatism plot, and (C) distortion plot can be found in the first embodiment regarding the information on... Figure 2 and Figure 3 The contents described in (A) longitudinal spherical aberration diagram, (B) astigmatism curve diagram, and (C) distortion curve diagram are not repeated here.

[0094] Third Embodiment

[0095] Please refer to Figure 7 , Figure 7This is a schematic diagram of the structure of an optical lens 100 according to the third embodiment of this application. The optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 to the third lens L3 form a first lens group, and the fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move between the first lens group and the imaging surface 101 along the optical axis O. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be found in the specific embodiments described above, and will not be repeated here.

[0096] Furthermore, in the third embodiment, the refractive power of each lens is the same as that of each lens in the first embodiment. Meanwhile, in the third embodiment, the surface shape of each lens differs from that of each lens in the first embodiment in that: the image-side surface S2 of the first lens L1 is convex near the optical axis O; the object-side surface S5 of the third lens L3 is convex near the optical axis O; and the object-side surface S7 of the fourth lens L4 is concave near the optical axis O.

[0097] Specifically, taking the focal length f of optical lens 100 as 14.62mm to 10.39mm, the maximum field of view (FOV) of optical lens 100 as 25.4° to 26.8°, the total optical length (TTL) of optical lens 100 as 15.32mm, and the aperture number (FNO) as 3 to 3.2 as an example. Other parameters in the third embodiment are given in Tables 7, 8, and 9 below, and the definitions of each parameter can be derived from the descriptions of the aforementioned embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and focal length in Table 7 are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 7 is 587.6nm, and the reference wavelength for the focal length is 555nm. In Table 8, the unit for the maximum field of view (FOV) is °, and the units for focal length f, object distance OBJ, D1, D2, and TTL are all mm.

[0098] Table 7

[0099]

[0100]

[0101] Table 8

[0102] Third Embodiment OBJ D1 D2 FOV f FNO TTL Telephoto mode unlimited 1.267 5.558 26.8 14.62 3.2 15.32 Short focal length 50 3.667 3.157 25.4 10.39 3 15.32

[0103] Table 9

[0104]

[0105]

[0106] Please see Figure 8 and Figure 9 ,Depend on Figure 8 and Figure 9 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism curve diagram, and (C) the distortion curve diagram, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled in both telephoto and short-focal-length settings, thus the optical lens 100 of this embodiment possesses good image quality. Furthermore, regarding... Figure 8 and Figure 9 The wavelengths corresponding to the curves in (A) longitudinal spherical aberration plot, (B) astigmatism plot, and (C) distortion plot can be found in the first embodiment regarding the information on... Figure 2 and Figure 3 The contents described in (A) longitudinal spherical aberration diagram, (B) astigmatism curve diagram, and (C) distortion curve diagram are not repeated here.

[0107] Fourth embodiment

[0108] Please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of an optical lens 100 according to the fourth embodiment of this application. The optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 to the third lens L3 form a first lens group, and the fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move between the first lens group and the imaging surface 101 along the optical axis O. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be found in the specific embodiments described above, and will not be repeated here.

[0109] Furthermore, in the fourth embodiment, the refractive power of each lens is the same as that of each lens in the first embodiment. However, in the fourth embodiment, the surface shape of each lens differs from that of each lens in the first embodiment in that the object-side surface S5 of the third lens L3 is convex near the optical axis O.

[0110] Specifically, taking the focal length f of optical lens 100 as 16.82mm to 11.88mm, the maximum field of view (FOV) of optical lens 100 as 23.5° to 21.3°, the total optical length (TTL) of optical lens 100 as 17.5mm, and the aperture number (FNO) as 3.5 to 3.7 as examples. Other parameters in the fourth embodiment are given in Tables 10, 11, and 12 below, and the definitions of each parameter can be derived from the descriptions of the aforementioned embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and focal length in Table 10 are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 10 is 587.6nm, and the reference wavelength for the focal length is 555nm. In Table 11, the unit for maximum field of view (FOV) is °, and the units for focal length f, object distance OBJ, D1, D2, and TTL are all mm.

[0111] Table 10

[0112]

[0113]

[0114] Table 11

[0115] Fourth embodiment OBJ D1 D2 FOV f FNO TTL Telephoto mode unlimited 1.167 6.391 23.5 16.82 3.7 17.5 Short focal length 50 3.667 3.892 21.3 11.88 3.5 17.5

[0116] Table 12

[0117]

[0118] Please see Figure 11 and Figure 12 ,Depend on Figure 11 and Figure 12 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism curve diagram, and (C) the distortion curve diagram, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled in both telephoto and short-focal-length settings, thus the optical lens 100 of this embodiment possesses good image quality. Furthermore, regarding... Figure 11 and Figure 12 The wavelengths corresponding to the curves in (A) longitudinal spherical aberration plot, (B) astigmatism plot, and (C) distortion plot can be found in the first embodiment regarding the information on... Figure 2 and Figure 3 The contents described in (A) longitudinal spherical aberration diagram, (B) astigmatism curve diagram, and (C) distortion curve diagram are not repeated here.

[0119] Fifth Embodiment

[0120] Please refer to Figure 13 , Figure 13This is a schematic diagram of the structure of an optical lens 100 according to the fifth embodiment of this application. The optical lens 100 includes an aperture stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, arranged sequentially along the optical axis O from the object side to the image side. The first lens L1 to the third lens L3 form a first lens group, and the fourth lens L4, the fifth lens L5, and the filter L6 form a second lens group. The first lens group is fixed relative to the imaging surface 101 of the optical lens 100, and the second lens group can move between the first lens group and the imaging surface 101 along the optical axis O. The materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, and fifth lens L5 can be found in the specific embodiments described above, and will not be repeated here.

[0121] Furthermore, in the fifth embodiment, the refractive power of each lens is the same as that of each lens in the first embodiment. However, in the fifth embodiment, the surface shape of each lens differs from that of each lens in the first embodiment in that: the image-side surface S2 of the first lens L1 is convex near the optical axis O; the object-side surface S5 of the third lens L3 is convex near the optical axis O; and the object-side surface S7 of the fourth lens L4 is concave near the optical axis O.

[0122] Specifically, taking the focal length f of optical lens 100 as 14.6mm to 10.4mm, the maximum field of view (FOV) of optical lens 100 as 26.8° to 25.6°, the total optical length (TTL) of optical lens 100 as 15.32mm, and the aperture number (FNO) as 3.0 to 3.2 as an example. Other parameters in the fifth embodiment are given in Tables 13, 14, and 15 below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and focal length in Table 13 are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 13 is 587.6nm, and the reference wavelength for the focal length is 555nm. In Table 14, the unit for maximum field of view (FOV) is °, and the units for focal length f, object distance OBJ, D1, D2, and TTL are all mm.

[0123] Table 13

[0124]

[0125] Table 14

[0126]

[0127] Table 15

[0128]

[0129] Please see Figure 14 and Figure 15 ,Depend on Figure 14 and Figure 15 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism curve diagram, and (C) the distortion curve diagram, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled in both telephoto and short-focal-length settings, thus the optical lens 100 of this embodiment possesses good image quality. Furthermore, regarding... Figure 14 and Figure 15 The wavelengths corresponding to the curves in (A) longitudinal spherical aberration plot, (B) astigmatism plot, and (C) distortion plot can be found in the first embodiment regarding the information on... Figure 2 and Figure 3 The contents described in (A) longitudinal spherical aberration diagram, (B) astigmatism curve diagram, and (C) distortion curve diagram are not repeated here.

[0130] Please refer to Table 16, which summarizes the ratios of the relationships in the first to fifth embodiments of this application.

[0131] Table 16

[0132]

[0133]

[0134] Please see Figure 16 This application also discloses a camera module 200, which includes a photosensitive chip 201 and the aforementioned optical lens 100. The photosensitive chip 201 is disposed on the image side of the optical lens 100. The optical lens 100 can receive light signals from a subject and project them onto the photosensitive chip 201, which can convert the light signals corresponding to the subject into image signals. It is understood that the camera module 200 with the aforementioned optical lens 100 can achieve focusing functionality while meeting miniaturization requirements.

[0135] Please see Figure 17 This application also discloses an electronic device 300, which includes a housing 301 and the aforementioned camera module 200. The camera module 200 is disposed on the housing 301 to acquire image information. The electronic device 300 can be, but is not limited to, a mobile phone, tablet computer, laptop computer, smartwatch, monitor, etc. It is understood that the electronic device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, the electronic device 300 can achieve focusing functionality while meeting miniaturization requirements.

[0136] The optical lens, camera module, and electronic device disclosed in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and electronic device of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens has a total of five lenses with refractive power. The five lenses are, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; Among them, the first lens to the third lens form a first lens group, the fourth lens and the fifth lens form a second lens group. The first lens group is fixed relative to the imaging surface of the optical lens, and the second lens group can move along the optical axis direction between the first lens group and the imaging surface of the optical lens; The first lens has a positive refractive power, and the object side surface of the first lens is convex near the optical axis; The second lens has a negative refractive power, and the object side surface of the second lens is concave near the optical axis; The third lens has a positive refractive power, and the image side surface of the third lens is convex near the optical axis; The fourth lens has refractive power; The fifth lens has a negative refractive power, the object side surface of the fifth lens is concave near the optical axis, and the image side surface of the fifth lens is convex near the optical axis; The optical lens satisfies the following relationships: 20° < FOV ≤ 27.1°; 0.4 < AT12 / AT23 < 3.5; 0.4 ≤ ∑ATmin / TDmin < 0.7; and, 0.1 < |R51 / fmax| < 0.2; Where, FOV is the maximum field angle of the optical lens, AT12 is the air gap on the optical axis from the image side surface of the first lens to the object side surface of the second lens, AT23 is the air gap on the optical axis from the image side surface of the second lens to the object side surface of the third lens, ∑ATmin is the sum of the air gaps on the optical axis between adjacent two of the first lens to the fifth lens, TDmin is the minimum distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens, R51 is the curvature radius of the object side surface of the fifth lens at the optical axis, and fmax is the maximum focal length of the optical lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 0.95 < TTL / fmax < 1.1, and / or, 0.7 < TDmax / TTL < 0.8; Where, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, fmax is the maximum focal length of the optical lens, and TDmax is the maximum distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 0.75 < |F₁₂₃ / F₄₅| < 1, and / or, F₁₂₃ > 0mm, and / or, F₄₅ < 0, and / or, 0.4 < |F₁₂₃ / fmax| < 0.6, and / or, 0.5 < |F₄₅ / fmax| < 0.8; Where, F₁₂₃ is the combined focal length of the first lens, the second lens, and the third lens, and F₄₅ is the combined focal length of the fourth lens and the fifth lens.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationships: 0.611 ≤ |F₄₅ / fmax| ≤ 0.723; Among them, F45 is the combined focal length of the fourth lens and the fifth lens.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.52 ≤ |F123 / fmax| < 0.6; Among them, F123 is the combined focal length of the first lens, the second lens, and the third lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.144 ≤ AT45 / TDmin < 0.2, and / or, 2.3 mm < AT34max - AT34min < 2.6 mm, and / or, 0.499 ≤ (AT23 + AT45) / AT34max ≤ 0.888; Among them, AT23 is the air gap on the optical axis from the image side of the second lens to the object side of the third lens, AT34max is the maximum air gap on the optical axis from the image side of the third lens to the object side of the fourth lens, AT34min is the minimum air gap on the optical axis from the image side of the third lens to the object side of the fourth lens, and AT45 is the air gap on the optical axis from the image side of the fourth lens to the object side of the fifth lens.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.3 < ET1 / CT1 < 0.7, and / or, 0.3 < (|SAG11| + |SAG12|) / CT1 < 0.6; Among them, ET1 is the distance in the optical axis direction from the maximum effective aperture of the object side of the first lens to the maximum effective aperture of the image side of the first lens, CT1 is the thickness of the first lens on the optical axis, SAG11 is the distance in the direction parallel to the optical axis between the maximum effective aperture of the object side of the first lens and the intersection of the object side of the first lens and the optical axis, and SAG12 is the distance in the direction parallel to the optical axis between the maximum effective aperture of the image side of the first lens and the intersection of the image side of the first lens and the optical axis.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: |SAG22 / AT45| < 0.15, and / or, 0.2 < |R21 / fmax| < 0.5; Among them, SAG22 is the distance in the direction parallel to the optical axis between the maximum effective aperture of the image side of the second lens and the intersection of the image side of the second lens and the optical axis, AT45 is the air gap on the optical axis from the image side of the fourth lens to the object side of the fifth lens, and R21 is the curvature radius of the object side of the second lens at the optical axis.

9. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.317 ≤ |R21 / fmax| ≤ 0.373; Among them, R21 is the curvature radius of the object side of the second lens at the optical axis.

10. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.3 < ET3 / CT3 < 0.5, and / or, 0.749 ≤ (ET2 + ET3) / (CT2 + CT3) < 1; Wherein, ET2 is the distance from the maximum effective aperture of the object side of the second lens to the maximum effective aperture of the image side of the second lens in the optical axis direction, ET3 is the distance from the maximum effective aperture of the object side of the third lens to the maximum effective aperture of the image side of the third lens in the optical axis direction, CT2 is the thickness of the second lens on the optical axis, and CT3 is the thickness of the third lens on the optical axis.

11. The optical lens according to claim 1, characterized in that, The image-side surface of the fifth lens has one and only one critical point, which is located at the intersection of the image-side surface of the fifth lens and the optical axis, and / or, the optical lens satisfies the following relationship: |SAG42 / AT45|<0.3, and / or, 0.3<|SAG51 / AT45|<0.6; Wherein, SAG42 is the distance between the maximum effective aperture of the image side of the fourth lens and the intersection of the image side of the fourth lens and the optical axis in a direction parallel to the optical axis; SAG51 is the distance between the maximum effective aperture of the object side of the fifth lens and the intersection of the object side of the fifth lens and the optical axis in a direction parallel to the optical axis; and AT45 is the air gap between the image side of the fourth lens and the object side of the fifth lens on the optical axis.

12. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 0.16≤|R51 / fmax|<0.

2.

13. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: 25 < |V2 - V1| ≤ 35.6; Wherein, V2 is the Abbe number of the second lens, and V1 is the Abbe number of the first lens.

14. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relationship: (n1+n2) / 2n1>1; Wherein, n1 is the refractive index of the first lens, and n2 is the refractive index of the second lens.

15. A camera module, characterized in that, The camera module includes a photosensitive chip and an optical lens as described in any one of claims 1-14, wherein the photosensitive chip is disposed on the image side of the optical lens.

16. An electronic device, characterized in that, The electronic device includes a housing and a camera module as described in claim 15, the camera module being disposed within the housing.

Images