Optical lenses and electronic devices

Abstract

This application discloses an optical lens and an electronic device. The optical lens includes: a lens barrel; a lens group disposed within the lens barrel, the lens group including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side along the optical axis; a plurality of spacers, including a third spacer and a fourth spacer; one of the first and second lenses has positive optical power, and the other has negative optical power; at least two of the fourth, fifth, and sixth lenses have negative optical power; at least four of the first to sixth lenses have concave image-side surfaces; the maximum height L of the lens barrel along the optical axis is less than 5 mm; the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the inner diameter d3s of the object-side surface of the third spacer, and the outer diameter D4s of the object-side surface of the fourth spacer satisfy the following condition: 4 < (R3*R4) / (d3s*D4s) < 9.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese invention patent application filed on April 28, 2022, entitled "Optical Lens and Electronic Device" with application number 202210493823.7. Technical Field

[0003] This application relates to the field of optical components technology, and more particularly to optical lenses and electronic devices. Background Technology

[0004] With the continuous development of optical lens technology, optical lenses are being used more and more widely. For example, they play an irreplaceable role in many fields such as smartphones, security monitoring, automotive driver assistance, intelligent detection, and virtual reality.

[0005] Taking the smartphone industry as an example, as users' demands for the appearance and camera functions of mobile phones increase, mobile phone manufacturers are constantly increasing the number of optical lenses and the number of lenses within each lens in order to improve the quality and competitiveness of their products. For example, some mobile phones in related technologies include at least one front-facing optical lens and at least two rear-facing optical lenses. Each optical lens generally includes a lens barrel and multiple lenses arranged sequentially and spaced apart along the axis of the lens barrel. During assembly, each lens is sequentially inserted into the lens barrel and connected to the lens barrel with an interference fit. Two adjacent lenses with significantly different diameters are transitioned by a spacer of a certain thickness, which is supported between the two lenses by two parallel end faces. Although increasing the number of optical lenses and lenses improves the user experience, the increase in the number of lenses makes it difficult to control the uniformity of the step difference of the lenses located at the front and rear of the lens barrel, resulting in higher tolerance sensitivity and making it difficult to balance the aberrations of the entire optical system, thus affecting image quality. At the same time, the increase in the number of optical lenses also leads to a continuous decrease in the space ratio of each individual optical lens.

[0006] Therefore, while ensuring that the imaging specifications remain unchanged, there is an urgent need for an optical lens that balances miniaturization and high imaging quality.

[0007] Application content

[0008] This application proposes an optical lens and electronic device that balances miniaturization and high imaging quality.

[0009] An optical lens according to a first aspect embodiment of this application includes: a lens barrel; a lens group disposed within the lens barrel, the lens group including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side; a plurality of spacers located within the lens barrel; the plurality of spacers including a third spacer disposed between the third lens and the fourth lens and a fourth spacer disposed between the fourth lens and the fifth lens; wherein one of the first lens and the second lens has positive optical power, the other... One of the lenses has negative optical power; at least two of the fourth, fifth, and sixth lenses have negative optical power; at least four of the first to sixth lenses have concave image-side surfaces; the maximum height L of the lens barrel along the optical axis is less than 5 mm; and the radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the inner diameter d3s of the object-side surface of the third spacer, and the outer diameter D4s of the object-side surface of the fourth spacer satisfy the following condition: 4 < (R3 * R4) / (d3s * D4s) < 9.

[0010] According to one embodiment of this application, the second lens has negative optical power, the object side of the second lens is convex, and the image side of the second lens is concave; the fourth lens has negative optical power, and the image side of the fourth lens is concave.

[0011] According to one embodiment of this application, the sixth lens has negative optical power, and both the object-side and image-side surfaces of the sixth lens are concave.

[0012] According to one embodiment of this application, at least three spacers are provided between the first lens and the fourth lens, and at least three spacers are provided between the third lens and the sixth lens.

[0013] According to one embodiment of this application, the plurality of spacers further include a first spacer disposed between the first lens and the second lens, a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; wherein, the outer diameter D0m of the end face of the lens barrel facing the image side, the center thickness CT1 of the first lens on the optical axis, the effective focal length f2 of the second lens, the effective focal length f6 of the sixth lens, the distance EP12 between the image side surface of the first spacer and the object side surface of the second spacer on the optical axis, and the maximum thickness CP5 of the fifth spacer satisfy the following condition: 21<(f2*f6*CT1) / (D0m*EP12*CP5)<47.

[0014] According to one embodiment of this application, the plurality of spacers further includes a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; wherein the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, the center thickness CT2 of the second lens on the optical axis, the maximum thickness CP2 of the second spacer, the inner diameter d2s of the object side of the second spacer, and the inner diameter d5s of the object side of the fifth spacer satisfy the following condition: 14 < (d5s / CP2) / (R2 / R1+d2s / CT2) < 24.

[0015] According to one embodiment of this application, the plurality of spacers further include a first spacer disposed between the first lens and the second lens, and a fifth spacer disposed between the fifth lens and the sixth lens; wherein the air gap T23 between the second lens and the third lens on the optical axis, the effective focal length f5 of the fifth lens, the radius of curvature R9 of the object side surface of the fifth lens, the inner diameter d1s of the object side surface of the first spacer, the outer diameter D1s of the object side surface of the first spacer, and the inner diameter d5m of the image side surface of the fifth spacer satisfy the following condition: 10 < (f5*d1s+D1s*R9) / (d5m*T23) < 20.

[0016] According to one embodiment of this application, the plurality of spacers further includes a first spacer disposed between the first lens and the second lens, and a second spacer disposed between the second lens and the third lens; wherein, the inner diameter d0m of the end face of the lens barrel facing the image side, the air gap T12 between the first lens and the second lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the outer diameter D1m of the image side of the first spacer, and the distance EP23 between the image side of the second spacer and the object side of the third spacer on the optical axis satisfy the following conditions:

[0017] 20<(D1m+d0m) / (T12+T34+EP23)<30.

[0018] According to one embodiment of this application, the plurality of spacers further includes a first spacer disposed between the first lens and the second lens and a sixth spacer abutting against the image-side surface of the sixth lens; wherein, the effective focal length f1 of the first lens, the center thickness CT6 of the sixth lens on the optical axis, the inner diameter d1m of the image-side surface of the first spacer, the maximum thickness CP1 of the first spacer, and the outer diameter D6m of the image-side surface of the sixth spacer satisfy the following condition: 23<(D6m+d1m+f1) / (CP1+CT6)<33.

[0019] According to one embodiment of this application, the plurality of spacers further includes a fifth spacer disposed between the fifth lens and the sixth lens; wherein the radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the inner diameter d3m of the image-side surface of the third spacer, and the outer diameter D5s of the object-side surface of the fifth spacer satisfy the following conditions:

[0020] 0 <T56*(R12-R11) / (d3m*D5s)<5。

[0021] According to one embodiment of this application, the plurality of spacers further includes a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; wherein the effective focal length of the fourth lens is f4, the radius of curvature of the image-side surface of the fourth lens is R8, the inner diameter of the image-side surface of the second spacer is d2m, the distance EP34 between the image-side surface of the third spacer and the object-side surface of the fourth spacer on the optical axis, the inner diameter of the image-side surface of the fourth spacer is d4m, and the outer diameter of the image-side surface of the fifth spacer is D5m, satisfying the following condition: 26 < (D5m / EP34 - f4 / R8) / (d2m / d4m) < 52.

[0022] According to one embodiment of this application, the plurality of spacers further includes a second spacer disposed between the second lens and the third lens, and a sixth spacer abutting against the image side of the sixth lens; wherein, the center thickness CT5 of the fifth lens on the optical axis, the air gap T56 between the fifth lens and the sixth lens on the optical axis, the outer diameter D2s of the object side of the second spacer, the inner diameter d4s of the object side of the fourth spacer, the maximum thickness CP4 of the fourth spacer, and the inner diameter d6s of the object side of the sixth spacer satisfy the following condition: 4<(D2s*d4s*CT5) / (d6s*CP4*T56)<54.

[0023] According to one embodiment of this application, the plurality of spacers further includes a second spacer disposed between the second lens and the third lens, and a sixth spacer abutting against the image-side surface of the sixth lens; wherein the total effective focal length f of the optical lens, the outer diameter D0s of the end face of the lens barrel facing the object side, the center thickness CT3 of the third lens on the optical axis, the outer diameter D2m of the image-side surface of the second spacer, the inner diameter d6m of the image-side surface of the sixth spacer, and the outer diameter D6s of the object-side surface of the sixth spacer satisfy the following condition: 52 < (d6m*D6s + D2m*f) / (CT3*D0s) < 72.

[0024] An electronic device according to a second aspect of this application includes an imaging element and an optical lens according to a first aspect of this application; the imaging element is used to convert an optical image formed by the optical lens into an electrical signal.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of the application. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the optical lens according to this application;

[0028] Figure 2 This is a schematic diagram of the structure of an optical lens according to Embodiment 1-1 of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the optical lens according to Embodiments 1-2 of this application;

[0030] Figure 4 These are schematic diagrams of the optical lenses according to embodiments 1-3 of this application;

[0031] Figures 5 to 7 The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical lenses of Embodiments 1-1, 1-2, or 1-3 are shown respectively.

[0032] Figure 8 This is a schematic diagram of the structure of an optical lens according to Embodiment 2-1 of this application;

[0033] Figure 9 This is a schematic diagram of the structure of an optical lens according to Embodiment 2-2 of this application;

[0034] Figure 10 These are schematic diagrams of the optical lens structure according to embodiments 2-3 of this application;

[0035] Figures 11 to 13 The on-axis chromatic aberration curves, astigmatism curves, and distortion curves of the optical lenses of Embodiments 2-1, 2-2, or 2-3 are shown respectively.

[0036] Figure 14 This is a schematic diagram of the structure of an optical lens according to Embodiment 3-1 of this application;

[0037] Figure 15 This is a schematic diagram of the structure of an optical lens according to Embodiment 3-2 of this application;

[0038] Figure 16 This is a schematic diagram of the structure of the optical lens according to Embodiment 3-3 of this application;

[0039] Figures 17 to 19 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical lenses of Embodiments 3-1, 3-2, or 3-3 are shown respectively.

[0040] Figure label:

[0041] E1, First lens; E2, Second lens; E3, Third lens; E4, Fourth lens;

[0042] E5, the fifth lens; E6, the sixth lens;

[0043] P1, First spacer; P2, Second spacer; P3, Third spacer;

[0044] P4, fourth spacer; P5, fifth spacer; P6, sixth spacer. Detailed Implementation

[0045] In the description of the embodiments of this application, it should be noted that the terms "longitudinal," "lateral," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0047] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Combination Figures 1 to 19 As shown, this application provides an optical lens, which includes a lens barrel and a lens group and a plurality of spacers disposed within the lens barrel; wherein, the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis; the plurality of spacers include a first spacer P1 disposed between the first lens E1 and the second lens E2 and a sixth spacer P6 abutting against the image side side of the sixth lens E6, that is, the image side side of the sixth lens E6 is provided with the sixth spacer P6, and the edge of the image side side of the sixth lens E6 contacts the object side side of the sixth spacer P6. Among them, one of the first lens E1 and the second lens E2 has positive optical power and the other has negative optical power; at least two of the fourth lens E4, the fifth lens E5 and the sixth lens E6 have negative optical power; at least four of the first lens E1 to the sixth lens E6 have concave image-side surfaces; the maximum height L of the lens barrel along the optical axis is less than 5mm; the effective focal length f1 of the first lens E1, the center thickness CT6 of the sixth lens E6 on the optical axis, the inner diameter d1m of the image-side surface of the first spacer P1, the maximum thickness CP1 of the first spacer P1 and the outer diameter D6m of the image-side surface of the sixth spacer P6 satisfy the following condition: 23<(D6m+d1m+f1) / (CP1+CT6)<33.

[0051] This application embodiment improves the compactness of the lens barrel and lens group by reasonably optimizing the maximum height L of the lens barrel, thus achieving miniaturization of the entire optical lens. Simultaneously, by setting multiple spacers within the lens barrel, this application embodiment not only better controls the light passing between the lenses (i.e., the first lens E1 to the sixth lens E6), improving stray light and ghosting in the overall optical system (i.e., the lens group) and effectively enhancing the image quality of the optical lens, but also utilizes the parametric relationships between the first spacer P1, the sixth spacer P6, and the first and sixth lenses E1 and E6 to limit the spacing between spacers located at the front of the lens barrel (near the object plane) and the thickness of spacers located at the rear of the lens barrel (near the imaging plane). This better controls the step uniformity of the lenses at the front and rear of the lens barrel, avoiding uneven lens barrel thickness and improving assembly stability. Furthermore, the effective focal length of the first lens E1 can be used to adjust the deflection angle of the edge field of view of the first lens E1, effectively reducing the sensitivity of the optical system. Furthermore, by rationally allocating the optical power of the first lens E1, the second lens E2, the fourth lens E4, the fifth lens E5, and the sixth lens E6, the embodiments of this application can achieve smooth convergence or divergence of light, thereby effectively balancing the aberrations of the optical system and further reducing tolerance sensitivity. Additionally, by setting the image-side surfaces of at least four of the first to sixth lenses E6 to be concave, the embodiments of this application can not only effectively control the refraction angle of light at each lens but also achieve good processing characteristics of the optical system.

[0052] It should be noted that those skilled in the art should understand that, without violating the technical solutions claimed in this application, the various effects described in this application can be obtained by changing the number of lenses in the lens group. That is to say, the number of lenses in the lens group is not limited to six, and those skilled in the art can add other lenses based on the actual situation.

[0053] In some embodiments, the second lens E2 has negative optical power, its object-side surface is convex, and its image-side surface is concave. The fourth lens E4 also has negative optical power and its image-side surface is concave. The advantage of this configuration is that it not only utilizes the negative optical power of the second lens E2 and its concave image-side surface to promote light divergence and increase the image surface of the entire optical system, but also, by using the second lens E2 with the aforementioned optical power and surface shape in combination with the fourth lens E4, it can balance the aberrations of the optical system, reduce tolerance sensitivity, and maintain the miniaturization of the optical system.

[0054] In some embodiments, the sixth lens E6 has negative optical power, and both the object-side and image-side surfaces of the sixth lens E6 are concave. By rationally configuring the optical power and surface shape of the sixth lens E6, the embodiments of this application can not only limit the spherical aberration contribution of the sixth lens E6 to a reasonable level, but also improve stray light and ghosting, thereby obtaining good imaging quality in the on-axis field of view.

[0055] In some embodiments, at least three spacers are provided between the first lens E1 and the fourth lens E4, and at least three spacers are provided between the third lens E3 and the sixth lens E6; wherein spacers are provided between the second lens E2 and the third lens E3, between the third lens E3 and the fourth lens E4, between the fourth lens E4 and the fifth lens E5, and / or between the fifth lens E5 and the sixth lens E6. For example, spacers are provided between the second lens E2 and the third lens E3, between the third lens E3 and the fourth lens E4, between the fourth lens E4 and the fifth lens E5, and between the fifth lens E5 and the sixth lens E6. The spacer between the second lens E2 and the third lens E3 is the second spacer P2, the spacer between the third lens E3 and the fourth lens E4 is the third spacer P3, the spacer between the fourth lens E4 and the fifth lens E5 is the fourth spacer P4, and the spacer between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5.

[0056] In some embodiments, spacers are provided between the second lens E2 and the third lens E3, and between the fifth lens E5 and the sixth lens E6; wherein the spacer between the second lens E2 and the third lens E3 is the second spacer P2, and the spacer between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5. Further, the outer diameter D0m of the end face of the lens barrel facing the image side, the center thickness CT1 of the first lens E1 on the optical axis, the effective focal length f2 of the second lens E2, the effective focal length f6 of the sixth lens E6, the distance EP12 between the image side of the first spacer P1 and the object side of the second spacer P2 on the optical axis, and the maximum thickness CP5 of the fifth spacer P5 satisfy the following condition: 21 < (f2 * f6 * CT1) / (D0m * EP12 * CP5) < 47. This embodiment of the application, by setting a second spacer P2 and a fifth spacer P5 and utilizing the above-mentioned conditional formula, can effectively control the axial dimensions of the first lens E1, the second lens E2, the fifth lens E5, and the sixth lens E6. This not only makes the structure of the lens group more compact, but also achieves a reasonable fit between the end face of the lens barrel facing the image side, i.e., the rear end face, and the lens group, avoiding large misalignment of the assembly bearing surface, thereby helping to improve the assembly stability of the entire lens group.

[0057] In some embodiments, spacers are provided between the second lens E2 and the third lens E3, and between the fifth lens E5 and the sixth lens E6; wherein the spacer between the second lens E2 and the third lens E3 is the second spacer P2, and the spacer between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5. Further, the radius of curvature R1 of the object side of the first lens E1, the radius of curvature R2 of the image side of the first lens E1, the center thickness CT2 of the second lens E2 on the optical axis, the maximum thickness CP2 of the second spacer P2, the inner diameter d2s of the object side of the second spacer P2, and the inner diameter d5s of the object side of the fifth spacer P5 satisfy the following condition: 14 < (d5s / CP2) / (R2 / R1+d2s / CT2) < 24. This embodiment of the application, by setting a second spacer P2 and a fifth spacer P5 and utilizing the above-mentioned conditional expression, can not only effectively achieve the distribution of the large field of view of the object side and improve the ability of subsequent optical groups to correct off-axis aberrations, thereby obtaining better imaging results, but also control the width of the second spacer P2, thereby increasing the blocking area of ​​the second spacer P2 on the second lens E2 and the third lens E3. The larger the blocking area, the more reflected light is blocked by the second spacer P2, which is more conducive to improving the stray light of the optical lens as a whole.

[0058] In some embodiments, a spacer is also provided between the fifth lens E5 and the sixth lens E6, and the spacer located between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5. Further, the air gap T23 between the second lens E2 and the third lens E3 on the optical axis, the effective focal length f5 of the fifth lens E5, the radius of curvature R9 of the object side surface of the fifth lens E5, the inner diameter d1s of the object side surface of the first spacer P1, the outer diameter D1s of the object side surface of the first spacer P1, and the inner diameter d5m of the image side surface of the fifth spacer P5 satisfy the following condition: 10 < (f5*d1s+D1s*R9) / (d5m*T23) < 20. This embodiment of the application, by setting a fifth spacer P5 and utilizing the above-mentioned conditional formula, can not only effectively control the effective focal length f5 of the fifth lens E5 and the radius of curvature of the object side surface of the fifth lens E5, but also control the radial dimension of the fifth spacer P5, thereby effectively controlling the astigmatism of the optical system and improving the imaging quality of the off-axis field of view. Moreover, it can ensure that the mating surfaces of the first lens E1 and the lens barrel, as well as the mating surfaces of the first lens E1 and the first spacer P1, coincide on the same straight line, and the larger the overlapping area, the better the assembly stability.

[0059] In some embodiments, spacers are provided between the second lens E2 and the third lens E3, and between the third lens E3 and the fourth lens E4; wherein the spacer between the second lens E2 and the third lens E3 is the second spacer P2, and the spacer between the third lens E3 and the fourth lens E4 is the third spacer P3. Further, the inner diameter d0m of the end face of the lens barrel facing the image side, the air gap T12 between the first lens E1 and the second lens E2 on the optical axis, the air gap T34 between the third lens E3 and the fourth lens E4 on the optical axis, the outer diameter D1m of the image side of the first spacer P1, and the distance EP23 between the image side of the second spacer P2 and the object side of the third spacer P3 on the optical axis satisfy the following condition: 20 < (D1m + d0m) / (T12 + T34 + EP23) < 30. This embodiment of the application, by setting a second spacer P2 and a third spacer P3 and utilizing the above-mentioned conditional formula, can not only effectively control the interception effect of the first spacer P1 on the emitted light of the first lens E1 while ensuring the illumination of the optical lens, that is, improve the interception of the emitted light of the first lens E1 by the first spacer P1, thereby improving the stray light of the optical lens and thus improving the imaging quality of the optical lens, but also improve the assembly stability of the lens located at the front of the lens barrel, and improve the problem of low yield caused by the fitting amount.

[0060] In some embodiments, spacers are provided between the third lens E3 and the fourth lens E4 and between the fourth lens E4 and the fifth lens E5; wherein, the spacer between the third lens E3 and the fourth lens E4 is the third spacer P3, and the spacer between the fourth lens E4 and the fifth lens E5 is the fourth spacer P4. Further, the radius of curvature R3 of the object side surface of the second lens E2, the radius of curvature R4 of the image side surface of the second lens E2, the inner diameter d3s of the object side surface of the third spacer P3, and the outer diameter D4s of the object side surface of the fourth spacer P4 satisfy the following condition: 4 < (R3 * R4) / (d3s * D4s) < 9. Since the imaging light passes through different lenses, that is, the first lens E1 to the sixth lens E6, is refracted and cross-converged in sequence, and finally converges to form an image at the imaging surface, the radius of curvature of each lens will affect the final imaging effect. In addition, the radius of curvature R3 of the object side surface of the second lens E2 and its radius of curvature R4 of the image side surface not only jointly determine whether the second lens E2 is a concave lens or a convex lens, but also affect the structure of other lenses between the second lens E2 and the imaging surface. In addition, the third spacer P3 is a component for assembling and connecting between the third lens E3 and the fourth lens E4, which can ensure the integrity of the passing light, and the more complete the light, the better the imaging quality of the optical lens; the fourth spacer P4 is a component for assembling and connecting between the fourth lens E4 and the fifth lens E5. The larger the contact area of the fourth spacer P4 with the fourth lens E4 and the fifth lens E5 respectively, the better the assembly stability of the entire optical lens. Based on this, by setting the third spacer P3 and the fourth spacer P4 and using the above conditional formula, the embodiments of the present application can effectively ensure the imaging quality and assembly stability of the optical lens.

[0061] In some embodiments, spacers are provided between the third lens E3 and the fourth lens E4 and between the fifth lens E5 and the sixth lens E6; wherein, the spacer between the third lens E3 and the fourth lens E4 is the third spacer P3, and the spacer between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5. Further, the radius of curvature R11 of the object side surface of the sixth lens E6, the radius of curvature R12 of the image side surface of the sixth lens E6, the air gap T56 between the fifth lens E5 and the sixth lens E6 on the optical axis, the inner diameter d3m of the image side surface of the third spacer P3, and the outer diameter D5s of the object side surface of the fifth spacer P5 satisfy the following condition: 0 < T56 * (R12 - R11) / (d3m * D5s) < 5. By setting the third spacer P3 and the fifth spacer P5 and using the above conditional formula, the embodiments of the present application can control the ratio of the radius of curvature R11 of the object side surface of the sixth lens E6 and its radius of curvature R12 of the image side surface to the radial dimensions of the third spacer P3 and the radial dimensions of the fifth spacer P5 within a reasonable range, thereby helping to improve the assembly stability of the rear lens, that is, the lens close to the imaging surface, restricting the assembly deformation amount of the lens group and ensuring the strength.

[0062] In some embodiments, spacers are provided between the second lens E2 and the third lens E3, between the third lens E3 and the fourth lens E4, between the fourth lens E4 and the fifth lens E5, and between the fifth lens E5 and the sixth lens E6; wherein, the spacer between the second lens E2 and the third lens E3 is the second spacer P2, the spacer between the third lens E3 and the fourth lens E4 is the third spacer P3, the spacer between the fourth lens E4 and the fifth lens E5 is the fourth spacer P4, and the spacer between the fifth lens E5 and the sixth lens E6 is the fifth spacer P5. Furthermore, the effective focal length of the fourth lens E4 is f4, the radius of curvature of the image-side surface of the fourth lens E4 is R8, the inner diameter of the image-side surface of the second spacer P2 is d2m, the distance on the optical axis between the image-side surface of the third spacer P3 and the object-side surface of the fourth spacer P4 is EP34, the inner diameter of the image-side surface of the fourth spacer P4 is d4m, and the outer diameter of the image-side surface of the fifth spacer P5 is D5m, all satisfying the following condition: 26 < (D5m / EP34 - f4 / R8) / (d2m / d4m) < 52. By setting the second spacer P2 to the fifth spacer P5 and utilizing the above-mentioned condition, this embodiment of the application can not only reasonably control the shape of the fourth lens E4, but also influence the fitting method and fitting dimensions of the fourth lens E4 with the third lens E3 and the fifth lens E5, thereby ensuring the assembly stability of the rear lens, i.e., the lens closest to the imaging plane.

[0063] In some embodiments, spacers are provided between the second lens E2 and the third lens E3, and between the fourth lens E4 and the fifth lens E5; wherein the spacer between the second lens E2 and the third lens E3 is the second spacer P2, and the spacer between the fourth lens E4 and the fifth lens E5 is the fourth spacer P4. Further, the center thickness CT5 of the fifth lens E5 on the optical axis, the air gap T56 between the fifth lens E5 and the sixth lens E6 on the optical axis, the outer diameter D2s of the object side of the second spacer P2, the inner diameter d4s of the object side of the fourth spacer P4, the maximum thickness CP4 of the fourth spacer P4, and the inner diameter d6s of the object side of the sixth spacer P6 satisfy the following condition: 4 < (D2s * d4s * CT5) / (d6s * CP4 * T56) < 54. This embodiment of the application, by setting the second spacer P2 and the fourth spacer P4 and utilizing the above-mentioned conditional formula, not only helps to control the thickness of the fifth lens E5, the thickness of the sixth lens E6, and the air gap T56 between the fifth lens E5 and the sixth lens E6 on the optical axis, but also because the larger the distance between the lenses, the easier it is to select and match the spacers. For example, the larger the distance between the fifth lens E5 and the sixth lens E6, the easier it is to select and match the fifth spacer P5, and the greater the space for improving stray light. Therefore, this embodiment of the application can better control the matching mode of the fourth lens E4, the fifth lens E5, and the sixth lens E6, which is more conducive to improving the overall stray light quality of the optical lens.

[0064] In some embodiments, a spacer is also provided between the second lens E2 and the third lens E3; wherein, the spacer located between the second lens E2 and the third lens E3 is the second spacer P2. Further, the total effective focal length f of the optical lens, the outer diameter D0s of the end face of the lens barrel facing the object side, the center thickness CT3 of the third lens E3 on the optical axis, the outer diameter D2m of the image side of the second spacer P2, the inner diameter d6m of the image side of the sixth spacer P6, and the outer diameter D6s of the object side of the sixth spacer P6 satisfy the following condition: 52 < (d6m*D6s + D2m*f) / (CT3*D0s) < 72. Since the outer diameter D0s of the end face of the lens barrel facing the object side determines the size of the head of the optical lens, for a camera module with a fixed window size in a mobile phone, if the head size of the optical lens is slightly larger than the window size, the overall appearance of the camera module is optimal; if the head size of the optical lens is significantly larger than the window size, the overall appearance of the camera module is second best; conversely, if the head size of the optical lens is smaller than the window size, the overall appearance of the camera module is worst. Therefore, based on the above reasons, this embodiment of the application can effectively control the wall thickness of the lens barrel by setting the second spacer P2 and the sixth spacer P6 and using the above conditional formula. The thicker the wall thickness of the lens barrel, the greater the pressure that the lens assembly can withstand, and thus the better the assembly stability of the front end of the optical lens, thereby improving the reliability of the optical lens under different conditions.

[0065] In some embodiments of this application, the optical lens further includes a filter and / or protective glass disposed between the sixth lens E6 and the imaging surface, for filtering light of different wavelengths and preventing damage to the image-side elements of the optical lens, such as chips.

[0066] In some embodiments, an aperture stop STO is disposed between the object plane OBJ and the first lens E1. The placement of the aperture stop STO facilitates the effective focusing of light entering the optical lens and helps to reduce the lens aperture. Furthermore, the aperture stop STO may be disposed adjacent to the object side surface of the first lens E1.

[0067] In some embodiments, any one of the first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6 can be a spherical lens or an aspherical lens. The embodiments of this application do not limit the number of spherical and aspherical lenses. It should be noted that, compared to the constant curvature of a spherical lens from its center to its periphery, the curvature of an aspherical lens changes continuously from its center to its periphery. Aspherical lenses have superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. To improve resolving quality, the number of aspherical lenses in the lens group can be increased. For example, the first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, and sixth lens E6 can all be aspherical lenses. This arrangement can eliminate aberrations that occur during imaging as much as possible, thereby improving the imaging quality of the optical lens and enhancing resolving power.

[0068] In some embodiments, any one of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 can be a glass lens or a plastic lens. Compared to plastic lenses, glass lenses can not only suppress the shift of the back focus of the optical lens with temperature changes and improve stability, but also avoid image blurring caused by high and low temperature changes in the operating environment, or even problems that affect the normal use of the optical lens. If high requirements are placed on temperature performance and resolution quality, the first lens E1 to the sixth lens E6 can all be glass aspherical lenses. Conversely, if the operating environment temperature is not high and the temperature difference is not large, the first lens E1 to the sixth lens E6 can all be lower-cost plastic lenses. Of course, the first lens E1 to the sixth lens E6 can also be partially made of glass lenses and partially made of plastic lenses.

[0069] Example 1-1

[0070] The following is for reference Figure 2 An optical lens according to Embodiment 1-1 of this application is described. Figure 2A schematic diagram of the structure of an optical lens according to Embodiment 1-1 of this application is shown.

[0071] like Figure 2 As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0072] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0073] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0074] Table 1 below shows the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens of Embodiment 1-1. Those skilled in the art will understand that the “thickness / distance” in the same row as surface number S1 refers to the center thickness of the first lens E1, the “thickness / distance” in the same row as surface number S2 refers to the air gap between the first lens E1 and the second lens E2, the “thickness / distance” in the same row as surface number S3 refers to the center thickness of the second lens E2, and so on.

[0075] Table 1

[0076]

[0077] Table 2 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for surface numbers S1 to S12 in Example 1-1.

[0078] Table 2

[0079] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -7.0459E-03 7.2541E-03 -3.0936E-02 6.0988E-02 -8.2382E-02 6.9966E-02 -3.6879E-02 1.0774E-02 -1.3481E-03 S2 -6.7818E-02 1.6973E-02 6.5328E-02 -1.6314E-01 1.7474E-01 -9.7622E-02 1.7212E-02 8.4809E-03 -3.6509E-03 S3 -6.6360E-02 7.2838E-02 1.0129E-01 -3.4284E-01 4.7034E-01 -3.7635E-01 1.8355E-01 -4.9195E-02 5.2542E-03 S4 -2.3005E-02 1.3118E-01 -3.1494E-01 1.0269E+00 -2.2732E+00 3.0702E+00 -2.4351E+00 1.0458E+00 -1.8588E-01 S5 -6.7097E-02 -9.8879E-02 5.6079E-01 -1.9529E+00 3.9703E+00 -5.0295E+00 3.8858E+00 -1.6764E+00 3.1084E-01 S6 -8.4071E-02 -4.4901E-02 4.0799E-01 -1.2941E+00 2.2039E+00 -2.2908E+00 1.4446E+00 -5.0436E-01 7.4650E-02 S7 -1.9657E-01 1.7625E-01 -2.1614E-01 3.4913E-01 -4.8314E-01 4.1480E-01 -1.9748E-01 4.7776E-02 -4.6219E-03 S8 -2.1732E-01 2.0749E-01 -2.9330E-01 4.1942E-01 -4.3306E-01 2.8497E-01 -1.1049E-01 2.2839E-02 -1.9381E-03 S9 -4.6487E-02 -7.6787E-03 1.5868E-02 -1.1507E-02 5.4719E-03 -2.1232E-03 5.5017E-04 -7.4956E-05 4.0041E-06 S10 7.9674E-03 -1.5927E-02 5.4224E-03 3.9883E-03 -3.9603E-03 1.3903E-03 -2.4906E-04 2.2862E-05 -8.5353E-07 S11 -2.2532E-01 9.7911E-02 -2.3404E-02 4.0546E-03 -5.6662E-04 6.0977E-05 -4.4435E-06 1.8758E-07 -3.4173E-09 S12 -2.1009E-01 9.8390E-02 -3.3476E-02 8.0629E-03 -1.3403E-03 1.4805E-04 -1.0278E-05 4.0338E-07 -6.7980E-09

[0080] Table 3 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiment 1-1. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0081] Table 3

[0082] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.365 2.410 4.600 4.600 2.246 2.222 4.800 4.800 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.674 2.674 3.744 4.447 5.105 5.485 6.703 7.202 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 8.380 7.580 7.841 8.209 8.303 9.564 10.153 4.992 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.024 0.448 0.020 0.265 0.381 0.200 0.300

[0083] Examples 1-2

[0084] The following is for reference Figure 3 Optical lenses according to embodiments 1-2 of this application are described. For the sake of brevity, descriptions similar to those in embodiments 1-1 will be omitted in this embodiment. Figure 3 A schematic diagram of the structure of an optical lens according to embodiments 1-2 of this application is shown.

[0085] like Figure 3As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0086] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0087] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0088] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 1 of Embodiment 1-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 2 of Embodiment 1-1.

[0089] Table 4 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lenses of Examples 1-2. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0090] Table 4

[0091] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.410 2.410 4.600 4.600 2.246 2.246 4.800 4.800 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.674 2.674 3.744 4.411 5.072 5.485 6.608 7.153 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 8.380 7.601 7.828 8.209 8.392 9.471 10.111 4.784 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.024 0.448 0.020 0.265 0.381 0.200 0.300

[0092] Examples 1-3

[0093] The following is for reference Figure 4 Optical lenses according to embodiments 1-3 of this application are described. For the sake of brevity, descriptions similar to those in embodiments 1-1 will be omitted in this embodiment. Figure 4 A schematic diagram of the structure of an optical lens according to embodiments 1-3 of this application is shown.

[0094] like Figure 4As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0095] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0096] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0097] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 1 of Embodiment 1-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 2 of Embodiment 1-1.

[0098] Table 5 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lenses of Examples 1-3. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0099] Table 5

[0100] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.410 2.436 4.600 4.600 2.265 2.246 4.800 4.800 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.674 2.674 3.791 4.447 5.189 5.550 6.703 7.286 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 8.380 7.646 7.841 8.209 8.330 9.619 10.212 5.043 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.022 0.448 0.020 0.265 0.381 0.200 0.300

[0101] In conclusion, Figure 5 The on-axis chromatic aberration curves of the optical lenses of Embodiments 1-1, 1-2, or 1-3 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the optical system. Figure 6 The astigmatism curves of the optical lenses of Embodiment 1-1, Embodiment 1-2, or Embodiment 1-3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 7 The distortion curves of the optical lenses of Embodiments 1-1, 1-2, or 1-3 are shown, representing the distortion values ​​corresponding to different image heights. Therefore, in conjunction with... Figures 5 to 7 It can be seen that the optical lenses provided in Examples 1-1 to 1-3 have good imaging quality.

[0102] Example 2-1

[0103] The following is for reference Figure 8 An optical lens according to Embodiment 2-1 of this application is described. Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 2-1 of this application is shown.

[0104] like Figure 8As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 and the image side S8 of the fourth lens E4 are both concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0105] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0106] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0107] Table 6 below shows the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens of Embodiment 2-1. Those skilled in the art will understand that the “thickness / distance” in the same row as surface number S1 refers to the center thickness of the first lens E1, the “thickness / distance” in the same row as surface number S2 refers to the air gap between the first lens E1 and the second lens E2, the “thickness / distance” in the same row as surface number S3 refers to the center thickness of the second lens E2, and so on.

[0108] Table 6

[0109]

[0110]

[0111] Table 7 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for surface numbers S1 to S12 in Example 2-1.

[0112] Table 7

[0113] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -6.2208E-03 2.0488E-03 -7.3112E-03 2.1168E-03 5.9018E-03 -1.0828E-02 7.4871E-03 -2.6482E-03 3.6722E-04 S2 -6.1482E-02 1.2737E-02 4.0368E-02 -6.8776E-02 -4.4522E-03 1.0935E-01 -1.2744E-01 6.4323E-02 -1.2733E-02 S3 -6.1242E-02 6.0425E-02 9.9580E-02 -2.9936E-01 3.7730E-01 -2.6550E-01 1.0253E-01 -1.5845E-02 -5.0530E-04 S4 -1.8296E-02 9.3347E-02 -1.4555E-01 4.9023E-01 -1.1725E+00 1.6450E+00 -1.3146E+00 5.5610E-01 -9.4524E-02 S5 -5.0902E-02 -1.0509E-01 5.0598E-01 -1.6714E+00 3.3057E+00 -4.1052E+00 3.1182E+00 -1.3294E+00 2.4588E-01 S6 -6.1571E-02 -5.7688E-02 3.1068E-01 -8.7896E-01 1.3938E+00 -1.3691E+00 8.1814E-01 -2.7069E-01 3.8271E-02 S7 -1.7744E-01 1.0624E-01 1.9977E-02 -2.1212E-01 3.5089E-01 -3.3572E-01 1.9719E-01 -6.3835E-02 8.5284E-03 S8 -2.1315E-01 1.6961E-01 -1.7719E-01 2.0175E-01 -1.8350E-01 1.1546E-01 -4.4403E-02 9.1892E-03 -7.8036E-04 S9 -3.5561E-02 9.0158E-03 -3.0506E-02 3.2768E-02 -2.1420E-02 8.6886E-03 -2.1096E-03 2.7887E-04 -1.5294E-05 S10 2.7693E-02 -1.5229E-02 -1.0307E-02 1.0812E-02 -5.0114E-03 1.3988E-03 -2.3062E-04 2.0431E-05 -7.4737E-07 S11 -1.6417E-01 7.7505E-02 -2.9556E-02 8.5542E-03 -1.6219E-03 1.9301E-04 -1.3944E-05 5.6069E-07 -9.6495E-09 S12 -1.5582E-01 7.5738E-02 -2.7419E-02 6.6383E-03 -1.0596E-03 1.0990E-04 -7.1329E-06 2.6289E-07 -4.1823E-09

[0114] Table 8 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiment 2-1. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0115] Table 8

[0116]

[0117]

[0118] Example 2-2

[0119] The following is for reference Figure 9 An optical lens according to Embodiment 2-2 of this application is described. For the sake of brevity, descriptions similar to those in Embodiment 2-1 will be omitted in this embodiment. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 2-2 of this application is shown.

[0120] like Figure 9As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 and the image side S8 of the fourth lens E4 are both concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0121] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0122] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0123] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 6 of Embodiment 2-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 7 of Embodiment 2-1.

[0124] Table 9 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiment 2-2. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0125] Table 9

[0126] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.265 2.265 4.500 4.500 2.122 2.122 4.700 4.700 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.613 2.613 3.644 4.274 4.917 5.385 6.124 7.049 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 8.280 7.494 7.766 7.938 8.204 9.380 10.011 4.709 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.024 0.448 0.020 0.265 0.381 0.200 0.190

[0127] Example 2-3

[0128] The following is for reference Figure 10 Optical lenses according to embodiments 2-3 of this application are described. For the sake of brevity, descriptions similar to those in embodiments 2-1 will be omitted in this embodiment. Figure 10 A schematic diagram of the structure of an optical lens according to embodiments 2-3 of this application is shown.

[0129] like Figure 10As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 and the image side S8 of the fourth lens E4 are both concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0130] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0131] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0132] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 6 of Embodiment 2-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 7 of Embodiment 2-1.

[0133] Table 10 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lenses of Examples 2-3. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0134] Table 10

[0135]

[0136]

[0137] In conclusion, Figure 11 The on-axis chromatic aberration curves of the optical lenses of Embodiments 2-1, 2-2, or 2-3 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the optical system. Figure 12 The astigmatism curves of the optical lenses of Embodiment 2-1, Embodiment 2-2, or Embodiment 2-3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 13 The distortion curves of the optical lenses of Embodiments 2-1, 2-2, or 2-3 are shown, representing the distortion values ​​corresponding to different image heights. Therefore, in conjunction with... Figures 11 to 13 It can be seen that the optical lenses provided in Examples 2-1 to 2-3 have good imaging quality.

[0138] Example 3-1

[0139] The following is for reference Figure 14 An optical lens according to Embodiment 3-1 of this application is described. Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 3-1 of this application is shown.

[0140] like Figure 14As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0141] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0142] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0143] Table 11 below shows the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens of Embodiment 3-1. Those skilled in the art will understand that the “thickness / distance” in the same row as surface number S1 refers to the center thickness of the first lens E1, the “thickness / distance” in the same row as surface number S2 refers to the air gap between the first lens E1 and the second lens E2, the “thickness / distance” in the same row as surface number S3 refers to the center thickness of the second lens E2, and so on.

[0144] Table 11

[0145]

[0146] Table 12 below shows the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for surface numbers S1 to S12 in Example 3-1.

[0147] Table 12

[0148]

[0149]

[0150] Table 13 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiment 3-1. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0151] Table 13

[0152] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.319 2.319 4.500 4.500 2.146 2.122 4.700 4.700 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.646 2.646 3.644 3.644 6.125 4.324 5.336 6.041 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 7.765 7.480 7.741 8.109 8.248 9.464 10.053 4.892 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.024 0.448 0.020 0.289 0.394 0.022 0.367

[0153] Example 3-2

[0154] The following is for reference Figure 15 An optical lens according to Embodiment 3-2 of this application is described. For the sake of brevity, descriptions similar to those in Embodiment 3-1 will be omitted in this embodiment. Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 3-2 of this application is shown.

[0155] like Figure 15As shown, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis within the lens barrel. All six lenses, from the first lens E1 to the sixth lens E6, are aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0156] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0157] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0158] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 11 of Embodiment 3-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 12 of Embodiment 3-1.

[0159] Table 14 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P6, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiment 3-2. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0160] Table 14

[0161]

[0162]

[0163] Example 3-3

[0164] The following is for reference Figure 16 An optical lens according to Embodiment 3-3 of this application is described. For the sake of brevity, descriptions similar to those in Embodiment 3-1 will be omitted in this embodiment. Figure 16 A schematic diagram of the structure of an optical lens according to Embodiments 3-3 of this application is shown.

[0165] like Figure 16As shown, in this embodiment of the application, the optical lens includes a lens barrel and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 disposed within the lens barrel and arranged sequentially from the object side to the image side along the optical axis. The first lens E1 to the sixth lens E6 are all aspherical lenses. The object side S1 of the first lens E1 is convex, and the image side S2 of the first lens E1 is concave. The object side S3 of the second lens E2 is convex, and the image side S4 of the second lens E2 is concave. The object side S5 of the third lens E3 is convex, and the image side S6 of the third lens E3 is concave. The object side S7 of the fourth lens E4 is convex, and the image side S8 of the fourth lens E4 is concave. The object side S9 and the image side S10 of the fifth lens E5 are both convex. The object side S11 and the image side S12 of the sixth lens E6 are both concave. Specifically, a first spacer P1 is provided between the first lens E1 and the second lens E2, a second spacer P2 is provided between the second lens E2 and the third lens E3, a third spacer P3 is provided between the third lens E3 and the fourth lens E4, a fourth spacer P4 is provided between the fourth lens E4 and the fifth lens E5, a fifth spacer P5 is provided between the fifth lens E5 and the sixth lens E6, and a sixth spacer P6 is provided on the image side of the sixth lens E6, with the edge of the image side of the sixth lens E6 contacting the object side of the sixth spacer P6.

[0166] Furthermore, an aperture stop STO is provided between the object plane OBJ and the first lens E1. The placement of the aperture stop STO is beneficial for effectively converging the light entering the optical lens, and for reducing the lens aperture. Furthermore, the aperture stop STO can be positioned close to the object side of the first lens E1.

[0167] In addition, the optical lens also includes a protective glass located between the sixth lens E6 and the imaging plane. The object side of the protective glass faces the image side of the sixth lens E6, and the image side of the protective glass faces the imaging plane. The protective glass is used to protect the image sensor chip located at the imaging plane. In some embodiments, the optical lens also includes a filter located between the sixth lens E6 and the imaging plane. The filter is used to correct color deviation.

[0168] In this embodiment, the surface type, radius of curvature, thickness / distance, material, and conic coefficient of each lens in the optical lens can adopt the parameters in Table 11 of Embodiment 3-1. Furthermore, the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of surfaces S1 to S12 in this embodiment can adopt the parameters in Table 12 of Embodiment 3-1.

[0169] Table 15 below shows the image-side inner diameters d1m to d6m of the first spacer P1 to the sixth spacer P6, the object-side inner diameters d1s to d6s of the first spacer P1 to the sixth spacer P6, the object-side outer diameters D1s and D2s of the first spacer P1 and the second spacer P2, the object-side outer diameters D4s to D6s of the fourth spacer P4 to the sixth spacer P5, the image-side outer diameters D1m and D2m of the first spacer P1 and the second spacer P2, the image-side outer diameters D5m and D6m of the fifth spacer P5 and the sixth spacer P6, and the lens barrel facing the image side in the optical lens of Embodiments 3-3. The inner diameter of the end face d0m, the outer diameter of the end face facing the image side of the lens barrel D0m, the outer diameter of the end face facing the object side of the lens barrel D0s, the maximum thicknesses of the first spacer P1 and the second spacer P2 CP1 and CP2, the maximum thicknesses of the fourth spacer P4 and the fifth spacer P5 CP4 and CP5, the distance on the optical axis between the image side of the first spacer P1 and the object side of the second spacer P2 EP12, the distance on the optical axis between the image side of the second spacer P2 and the object side of the third spacer P3 EP23, and the distance on the optical axis between the image side of the third spacer P3 and the object side of the fourth spacer P4 EP34.

[0170] Table 15

[0171] parameter d1s(mm) d1m(mm) D1s(mm) D1m(mm) d2s(mm) d2m(mm) D2s(mm) D2m(mm) numerical values 2.337 2.319 4.500 4.500 2.157 2.122 4.700 4.700 parameter d3s(mm) d3m(mm) d4s(mm) d4m(mm) D4s(mm) d5s(mm) d5m (mm) D5s(mm) numerical values 2.646 2.657 3.644 3.664 6.125 4.449 5.555 6.128 parameter D5m (mm) d6s(mm) d6m (mm) D6m (mm) D6s(mm) d0m(mm) D0m(mm) D0s(mm) numerical values 5.915 7.480 7.784 8.109 8.248 9.525 10.149 5.189 parameter CP1(mm) EP12(mm) CP2 (mm) EP23(mm) EP34(mm) CP4 (mm) CP5 (mm) numerical values 0.024 0.448 0.020 0.289 0.394 0.022 0.426

[0172] In conclusion, Figure 17 The on-axis chromatic aberration curves of the optical lenses of Embodiments 3-1, 3-2, or 3-3 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the optical system. Figure 18 The astigmatism curves of the optical lenses of Embodiments 3-1, 3-2, or 3-3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 19 The distortion curves of the optical lenses of Embodiments 3-1, 3-2, or 3-3 are shown, representing the distortion values ​​corresponding to different image heights. Therefore, in conjunction with... Figures 17 to 19 It can be seen that the optical lenses provided in Examples 3-1 to 3-3 have good imaging quality.

[0173] In summary, Examples 1-1 to 3-3 satisfy the relationships shown in Tables 16 and 17 below, respectively.

[0174] Table 16 shows the effective focal lengths f1 to f6 of the first lens E1 to the sixth lens E6 in the optical lens, the total effective focal length f of the optical lens, the total optical length TTL of the optical lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15), and half the diagonal length ImgH of the effective pixel area on the imaging surface S15.

[0175] Table 16

[0176] Example parameters Examples 1-1 to Examples 1-3 Examples 2-1 to 2-3 Examples 3-1 to 3-3 f1(mm) 4.17 4.16 4.16 f2 (mm) -11.76 -12.40 -15.08 f3 (mm) 138.17 76.61 -474.35 f4 (mm) -27.06 -15.61 -10.47 f5 (mm) 5.30 5.18 4.25 f6 (mm) -3.42 -3.46 -3.39 f(mm) 4.65 4.65 4.65 TTL(mm) 5.40 5.40 5.40 ImgH(mm) 4.33 4.16 4.20

[0177] Table 17

[0178]

[0179] It should be noted that the lens group, lens barrel and spacer in the various embodiments of this application can be arbitrarily combined. That is to say, it is not limited to the lens group in a certain embodiment being combined only with the lens barrel and spacer in that embodiment.

[0180] In addition, this application also provides an electronic device, which includes an imaging element and the optical lens in the above embodiments; wherein the imaging element is used to convert the optical image formed by the optical lens into an electrical signal.

[0181] In some embodiments, the electronic device may be a stand-alone electronic device, such as a range detector, or an imaging module integrated into a range detector. Furthermore, the electronic device may be a stand-alone imaging device, such as an in-vehicle camera, or an imaging module integrated into a driver assistance system.

[0182] In some embodiments, the imaging element may be, but is not limited to, a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).

[0183] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An optical lens, characterized in that, include: Lens tube; A lens group is disposed inside the lens barrel, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged sequentially along the optical axis from the object side to the image side; as well as Multiple spacers are located inside the lens barrel; the multiple spacers include a third spacer disposed between the third lens and the fourth lens, and a fourth spacer disposed between the fourth lens and the fifth lens; Wherein, at least four of the first to sixth lenses have concave image-side surfaces; the maximum height L of the lens barrel along the optical axis is less than 5 mm; and The radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the inner diameter d3s of the object-side surface of the third spacer, and the outer diameter D4s of the object-side surface of the fourth spacer satisfy the following conditions: 5.89≤(R3 R4) / (d3s D4s)≤7.83; The first lens has positive optical power, and its object side is convex and its image side is concave. The second lens has negative optical power, with its object side being convex and its image side being concave. The third lens has positive or negative optical power; The fourth lens has negative optical power; The fifth lens has positive optical power; The sixth lens has negative optical power, and its object side is concave, as is its image side; The optical lens has six lenses with optical power.

2. The optical lens according to claim 1, wherein, The image-side surface of the fourth lens is concave.

3. The optical lens according to claim 1, wherein, At least three spacers are provided between the first lens and the fourth lens, and at least three spacers are provided between the third lens and the sixth lens.

4. The optical lens according to claim 1, wherein, The plurality of spacers further include a first spacer disposed between the first lens and the second lens, a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; The outer diameter D0m of the end face of the lens barrel facing the image side, the center thickness CT1 of the first lens on the optical axis, the effective focal length f2 of the second lens, the effective focal length f6 of the sixth lens, the distance EP12 between the image side surface of the first spacer and the object side surface of the second spacer on the optical axis, and the maximum thickness CP5 of the fifth spacer satisfy the following conditions: 23.76≤(f2 f6 CT1) / (D0m EP12 CP5)≤45.

18.

5. The optical lens according to claim 1, wherein, The plurality of spacers also include a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; The following conditions must be met: the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the center thickness CT2 of the second lens on the optical axis, the maximum thickness CP2 of the second spacer, the inner diameter d2s of the object-side surface of the second spacer, and the inner diameter d5s of the object-side surface of the fifth spacer. 16.43≤(d5s / CP2) / (R2 / R1+d2s / CT2)≤20.

25.

6. The optical lens according to claim 1, wherein, The plurality of spacers also include a first spacer disposed between the first lens and the second lens, and a fifth spacer disposed between the fifth lens and the sixth lens; Wherein, the air gap T23 between the second lens and the third lens on the optical axis, the effective focal length f5 of the fifth lens, the radius of curvature R9 of the object-side surface of the fifth lens, the inner diameter d1s of the object-side surface of the first spacer, the outer diameter D1s of the object-side surface of the first spacer, and the inner diameter d5m of the image-side surface of the fifth spacer satisfy the following conditions: 12.56 ≤ (f5 d1s+D1s R9) / (d5m T23)≤16.23。 7. The optical lens according to claim 1, wherein, The plurality of spacers further include a first spacer disposed between the first lens and the second lens, and a second spacer disposed between the second lens and the third lens; The inner diameter d0m of the end face of the lens barrel facing the image side, the air gap T12 between the first lens and the second lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the outer diameter D1m of the image side of the first spacer, and the distance EP23 between the image side of the second spacer and the object side of the third spacer on the optical axis satisfy the following conditions: 23.42≤(D1m+d0m) / (T12+T34+EP23)≤26.

20.

8. The optical lens according to claim 1, wherein, The plurality of spacers also include a first spacer disposed between the first lens and the second lens, and a sixth spacer abutting against the image side of the sixth lens; Wherein, the effective focal length f1 of the first lens, the center thickness CT6 of the sixth lens on the optical axis, the inner diameter d1m of the image-side surface of the first spacer, the maximum thickness CP1 of the first spacer, and the outer diameter D6m of the image-side surface of the sixth spacer satisfy the following conditions: 25.83≤(D6m+d1m+f1) / (CP1+CT6)≤31.

66.

9. The optical lens according to any one of claims 1 to 8, wherein, The plurality of spacers also includes a fifth spacer disposed between the fifth lens and the sixth lens; The radius of curvature R11 of the object-side surface of the sixth lens, the radius of curvature R12 of the image-side surface of the sixth lens, the air gap T56 between the fifth and sixth lenses on the optical axis, the inner diameter d3m of the image-side surface of the third spacer, and the outer diameter D5s of the object-side surface of the fifth spacer satisfy the following conditions: 0.75≤T56 (R12-R11) / (d3m D5s)≤3.62。 10. The optical lens according to any one of claims 1 to 8, wherein, The plurality of spacers also include a second spacer disposed between the second lens and the third lens, and a fifth spacer disposed between the fifth lens and the sixth lens; The effective focal length of the fourth lens is f4, the radius of curvature of the image-side surface of the fourth lens is R8, the inner diameter of the image-side surface of the second spacer is d2m, the distance EP34 between the image-side surface of the third spacer and the object-side surface of the fourth spacer on the optical axis, the inner diameter of the image-side surface of the fourth spacer is d4m, and the outer diameter of the image-side surface of the fifth spacer is D5m, all satisfying the following conditions: 28.78≤(D5m / EP34-f4 / R8) / (d2m / d4m)≤50.

02.

11. The optical lens according to any one of claims 1 to 8, wherein, The plurality of spacers also include a second spacer disposed between the second lens and the third lens, and a sixth spacer abutting against the image side of the sixth lens; The following conditions must be met by the following conditions: the center thickness CT5 of the fifth lens on the optical axis; the air gap T56 between the fifth and sixth lenses on the optical axis; the outer diameter D2s of the object side of the second spacer; the inner diameter d4s of the object side of the fourth spacer; the maximum thickness CP4 of the fourth spacer; and the inner diameter d6s of the object side of the sixth spacer. 5.71≤(D2s d4s CT5) / (d6s CP4 T56)≤52.27。 12. The optical lens according to any one of claims 1 to 8, wherein, The plurality of spacers also include a second spacer disposed between the second lens and the third lens, and a sixth spacer abutting against the image side of the sixth lens; The total effective focal length f of the optical lens, the outer diameter D0s of the end face of the lens barrel facing the object side, the center thickness CT3 of the third lens on the optical axis, the outer diameter D2m of the image side of the second spacer, the inner diameter d6m of the image side of the sixth spacer, and the outer diameter D6s of the object side of the sixth spacer satisfy the following conditions: 55.57≤(d6m D6s+D2m f) / (CT3 D0s)≤69.67。 13. An electronic device, characterized in that, include: The optical lens as described in any one of claims 1 to 12; as well as An imaging element for converting the optical image formed by the optical lens into an electrical signal.

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