Camera lens

Abstract

The application discloses a camera lens, which comprises an optical lens group, a spacer group and a lens barrel; the optical lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from an object side to an image side along an optical axis, the first lens to the sixth lens all have optical power, the refractive index of the third lens is greater than the refractive index of the second lens and the refractive index of the fourth lens, the refractive index of the fourth lens is less than the refractive index of the third lens and the refractive index of the fifth lens, the spacer group comprises a second spacer, a third spacer and a fourth spacer, and the lens barrel contains the optical lens group and the spacer group; the inner diameter d0m of the image side end surface of the lens barrel and half of the maximum field angle Semi-FOV of the camera lens satisfy: 4.2mm < d0m / tan(Semi-FOV) < 5.0mm; the interval distance EP23 of the second spacer and the third spacer in the direction of the optical axis, the interval distance T23 of the second lens and the third lens on the optical axis and the interval distance T34 of the third lens and the fourth lens on the optical axis satisfy: 0.9 < EP23 / (T23+T34) < 1.8.

Description

Technical Field

[0001] This application relates to the field of optical devices, and particularly to a camera lens. Background Art

[0002] With the rapid development of modern photography and videography technologies, camera lenses have received extensive attention and applications because they can obtain a wider field of view. Camera lenses have achieved a relatively large field of view to a certain extent. However, with the increase in lens size and weight, the design of large heads and large bottoms makes the lens less flexible in installation and use. In some scenarios with strict space requirements, such as drone aerial photography equipment, small photography equipment, and front cameras of mobile phones, the application of camera lenses is greatly restricted. In wide-angle camera lenses, by controlling the ratio range of the inner diameter of the image-side end face of the lens barrel to the tangent value of half of the maximum field of view of the camera lens, the camera lens is made to have a small head. However, due to the arrangement of lens refractive indices, the third lens and the fourth lens have poor sensitivity to tilt peaks, which in turn affects the performance stability after assembly. Summary of the Invention

[0003] This application provides a camera lens, which includes an optical lens group, a spacer group, and a lens barrel. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens having optical power in sequence from the object side to the image side along the optical axis. The refractive index of the third lens is greater than the refractive indices of the second lens and the fourth lens, and the refractive index of the fourth lens is less than the refractive indices of the third lens and the fifth lens. Each of the object side surface and the image side surface of the fifth lens has at least one inflection point; the spacer group includes a second spacer, a third spacer, and a fourth spacer. Among them, the second spacer is placed on the image side surface of the second lens and contacts the image side surface of the second lens, the third spacer is placed on the image side surface of the third lens and contacts the image side surface of the third lens, and the fourth spacer is placed on the image side surface of the fourth lens and contacts the image side surface of the fourth lens; the lens barrel houses the optical lens group and the spacer group; wherein, the inner diameter d0m of the image-side end face of the lens barrel and half of the maximum field of view Semi-FOV of the camera lens satisfy: 4.2mm < d0m / tan(Semi-FOV) < 5.0mm; the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction, the spacing distance T23 between the second lens and the third lens on the optical axis, and the spacing distance T34 between the third lens and the fourth lens on the optical axis satisfy: 0.9 < EP23 / (T23 + T34) < 1.8; the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.8 < EP34 / (T34 + T45) < 2.5.

[0004] According to an exemplary embodiment of the present application, the outer diameter D0m of the image-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, and half of the maximum field angle Semi-FOV of the imaging lens satisfy: 85.1° < (D0m / D0s) * Semi-FOV < 90.6°.

[0005] According to an exemplary embodiment of the present application, the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the maximum thickness CP4 of the fourth spacer, and the central thickness CT4 of the fourth lens satisfy: 0.7 < (EP34 + CP4) / CT4 < 1.2.

[0006] According to an exemplary embodiment of the present application, the effective focal length f4 of the fourth lens, the distance SAG42 on the optical axis between the intersection of the image-side surface of the fourth lens on the optical axis and the vertex of the effective semi-aperture of the image-side surface of the fourth lens, and the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction satisfy: 1.8 < f4 / (|SAG42| + EP34) < 3.2.

[0007] According to an exemplary embodiment of the present application, the distance SAG31 on the optical axis between the intersection of the object-side surface of the third lens on the optical axis and the vertex of the effective semi-aperture of the object-side surface of the third lens, the central thickness CT3 of the third lens, and the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction satisfy: 0.9 < (|SAG31| + CT3) / EP23 < 1.5.

[0008] According to an exemplary embodiment of the present application, the inner diameter d3s of the object-side surface of the third spacer, the inner diameter d2s of the object-side surface of the second spacer, and the refractive index N3 of the third lens satisfy: 1.8 < d3s / d2s * N3 < 2.2.

[0009] According to an exemplary embodiment of the present application, the inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d3s of the object-side surface of the third spacer, and the refractive index N4 of the fourth lens satisfy: 1.7 < d4s / d3s * N4 < 2.5.

[0010] According to an exemplary embodiment of the present application, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: -4.2 < f1 / f5 < -2.1; the effective focal length f3 of the third lens and the effective focal length f of the imaging lens satisfy: -5.8 < f3 / f < -2.2; the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy: 1.6 < f2 / f4 < 2.4.

[0011] According to an exemplary embodiment of the present application, the inner diameter d0s of the object-side end face of the lens barrel and the effective focal length f of the imaging lens satisfy: 0.9 < d0s / f < 1.3.

[0012] According to an exemplary embodiment of this application, the outer diameter D4s of the object side of the fourth spacer, the effective half-aperture DT42 of the image side of the fourth lens, and the inner diameter d4s of the object side of the fourth spacer satisfy: 0.9 < (D4s - DT42) / d4s < 1.7.

[0013] According to an exemplary embodiment of this application, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the inner diameter d2s of the object-side surface of the second spacer, and the inner diameter d3s of the object-side surface of the third spacer satisfy: -2.8 <f3 / f2 / (d3s / d2s)<-1.4。

[0014] According to an exemplary embodiment of this application, the spacer group further includes a fifth spacer disposed on the image-side surface of the fifth lens and in at least partial contact with the image-side surface of the fifth lens; the outer diameter D4m of the image-side surface of the fourth spacer, the outer diameter D5m of the image-side surface of the fifth spacer, and the spacing distance EP45 between the fourth spacer and the fifth spacer in the optical axis direction satisfy: 18.4 < (D4m + D5m) / EP45 < 26.2.

[0015] According to an exemplary embodiment of this application, the radius of curvature R7 of the object-side surface of the fourth lens, the radius of curvature R8 of the image-side surface of the fourth lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: -1.1 < (R7 + R8) / (R3 - R4) < -0.5; the outer diameter D4m of the image-side surface of the fourth spacer and the outer diameter D2s of the object-side surface of the second spacer satisfy: 1.0 <D4m / D2s<1.9。

[0016] According to an exemplary embodiment of this application, the spacer group further includes a sixth spacer disposed on the image-side surface of the sixth lens and in at least partial contact with the image-side surface of the sixth lens, the object-side surface of the sixth lens having at least one inflection point; the distance YC52 from the nearest inflection point to the optical axis in the image-side surface of the fifth lens, the distance YC61 from the nearest inflection point to the optical axis in the object-side surface of the sixth lens, and the spacing distance EP46 between the fourth spacer and the sixth spacer in the optical axis direction satisfy: 1.4 < (YC52 + YC61) / EP46 < 2.2.

[0017] The camera lens provided by this application has six lenses. The combination of the refractive indices of the lenses and the setting of the bending point of the fifth lens are beneficial to the technical characteristics of the wide-angle of the lens. The inner diameter d0m of the image-side end face of the lens barrel and half of the maximum field angle Semi-FOV of the camera lens satisfy: 4.2mm < d0m / tan(Semi-FOV) < 5.0mm. The third lens, the fourth lens, and the fifth lens are made of materials with high, low, and high refractive indices to correct axial chromatic aberration and lateral chromatic aberration. Axial chromatic aberration affects the blur spot of the central field of view and will affect the peak performance of the central field of view. Lateral chromatic aberration will affect the blur spot of the off-axis field of view and the peak performance of MTF, significantly improving the decrease in MTF caused by the short-wave dispersion of the off-axis field of view. Furthermore, the tilt of the third lens and the fourth lens has a greater impact on the peak. By ensuring that the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction, the spacing distance T23 between the second lens and the third lens in the optical axis, and the spacing distance T34 between the third lens and the fourth lens in the optical axis satisfy: 0.9 < EP23 / (T23 + T34) < 1.8, and the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the spacing distance T34 between the third lens and the fourth lens in the optical axis, and the spacing distance T45 between the fourth lens and the fifth lens in the optical axis satisfy: 0.8 < EP34 / (T34 + T45) < 2.6, controlling the dimensional uniformity of the edges and centers of the third lens and the fourth lens and the air gaps before and after the third lens and the fourth lens is beneficial to reducing the sensitivity of the assembly tilt of the third lens and the fourth lens and improving the stability of the assembly performance of the third lens and the fourth lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects, and advantages of this application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Among them:

[0019] Figure 1 Shows a component and parameter labeling diagram of the camera lens according to this application;

[0020] Figure 2 Shows a parameter labeling diagram of the optical lens group of the camera lens according to this application;

[0021] Figure 3 Shows a schematic structural diagram of the camera lens according to Embodiment 1 of this application;

[0022] Figure 4 Shows a schematic structural diagram of the camera lens according to Embodiment 2 of this application;

[0023] Figures 5A to 5D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens according to Embodiment 1 or 2 of this application;

[0024] Figure 6 A schematic diagram of the camera lens according to Embodiment 3 of this application is shown;

[0025] Figure 7 A schematic diagram of the camera lens according to Embodiment 4 of this application is shown;

[0026] Figures 8A to 8D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens of Embodiment 3 or 4 of this application are shown respectively.

[0027] Figure 9 A schematic diagram of the camera lens according to Embodiment 5 of this application is shown;

[0028] Figure 10 A schematic diagram of the structure of a camera lens according to Embodiment 6 of this application is shown;

[0029] Figures 11A to 11D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens of Embodiment 5 or 6 of this application are shown respectively.

[0030] Figure 12 A schematic diagram of the camera lens according to Embodiment 7 of this application is shown;

[0031] Figure 13 A schematic diagram of the structure of a camera lens according to Embodiment 8 of this application is shown; and

[0032] Figures 14A to 14D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the camera lens of Embodiment 7 or 8 of this application are shown respectively. Detailed Implementation

[0033] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0034] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0035] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0036] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the image plane is called the image-side surface of the lens.

[0037] It should also be understood that the terms "comprising" and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0038] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0039] 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.

[0040] refer to Figures 1 to 3 , Figure 4 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 12 and Figure 13 One aspect of this application provides a camera lens that may include an optical lens group, which may sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens along the optical axis from the object side to the image side. The first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens all have optical power.

[0041] In an exemplary embodiment, there may be a gap between adjacent lenses in the first to sixth lenses, such as an air gap between adjacent lenses.

[0042] In an exemplary embodiment, the object side and image side of the fifth lens each have at least one inflection point, which is beneficial for miniaturizing the camera lens under the premise of wide angle.

[0043] In an exemplary embodiment, the object-side surface of the sixth lens has at least one inflection point, which, under the premise of wide angle, is conducive to miniaturizing the camera lens.

[0044] The camera lens may include a group of spacers, which may include at least one of a first spacer, a second spacer, a third spacer, a fourth spacer, and a fifth spacer. Specifically, the first spacer is positioned between and in contact with the image-side surface of the first lens and the second lens, for example, the first spacer at least partially contacts the image-side surface of the first lens. The second spacer is positioned between and in contact with the image-side surface of the second lens and the third lens, for example, the second spacer at least partially contacts the image-side surface of the second lens. The third spacer is positioned between and in contact with the image-side surface of the third lens and the fourth lens, for example, the third spacer at least partially contacts the image-side surface of the third lens. The fourth spacer is positioned between and in contact with the image-side surface of the fourth lens and the fifth lens, for example, the fourth spacer at least partially contacts the image-side surface of the fourth lens. The fifth spacer is positioned between and in contact with the image-side surface of the fifth lens and the sixth lens, for example, the fifth spacer at least partially contacts the image-side surface of the fifth lens. The proper use of spacers can effectively avoid stray light risks, reduce interference with image quality, and thus improve the imaging quality of the camera lens; at the same time, it also ensures the stability of the lens.

[0045] refer to Figure 4 , Figure 7 and Figure 10 As shown, the spacer assembly may further include a fourth auxiliary spacer, which is disposed on and in contact with the image side of the fourth spacer. For example, the fourth auxiliary spacer is at least partially in contact with the image side of the fourth spacer.

[0046] A camera lens may include a lens barrel that houses an optical lens group and a spacer group.

[0047] In an exemplary embodiment, the camera lens further includes an aperture stop disposed on the object side of the first lens.

[0048] In an exemplary embodiment, the refractive index of the third lens is greater than that of the adjacent lenses. That is, the refractive index of the third lens is greater than the refractive indices of the fourth lens and the second lens; the refractive index of the fourth lens is less than that of the adjacent lenses. That is, the refractive index of the fourth lens is less than the refractive indices of the third lens and the fifth lens. Through the combination of lenses with high and low refractive indices, it is beneficial for the camera lens to achieve a large wide angle. In particular, the combination of the high and low refractive indices of the third lens and the fourth lens in the middle of the lens affects the performance stability after assembly. For a wide-angle lens, through the combined design of 4 lenses made of low-refractive-index materials and 2 lenses made of high-refractive-index materials, a wide-angle lens with the characteristics of a small head and a small bottom and a field angle of more than 101 degrees can be achieved.

[0049] In an exemplary embodiment, the inner diameter d0m of the image-side end face of the lens barrel and half of the maximum field angle Semi-FOV of the camera lens satisfy: 4.2 mm < d0m / tan(Semi-FOV) < 5.0 mm; by controlling the ratio of the inner diameter of the image-side end face of the lens barrel to the tangent value of half of the maximum field angle of the camera lens, on the premise of a wide angle, it is beneficial for the camera lens to be miniaturized at the head.

[0050] In an exemplary embodiment, the range of half of the maximum field angle Semi-FOV of the camera lens is controlled to be greater than 50° and less than 55°.

[0051] In an exemplary embodiment, the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction, the spacing distance T23 between the second lens and the third lens on the optical axis, and the spacing distance T34 between the third lens and the fourth lens on the optical axis satisfy: 0.9 < EP23 / (T23 + T34) < 1.8; by controlling the sum of the spacing distances between the second lens and the third lens and between the third lens and the fourth lens on the optical axis, and the ratio of this sum to the spacing distance between the second spacer and the third spacer in the optical axis direction, to control the dimensional uniformity of the edge and center of the third lens and the air gap before and after the third lens, it is beneficial to reduce the sensitivity of the third lens to assembly tilt and improve the stability of the assembly performance of the third lens.

[0052] In an exemplary embodiment, the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the spacing distance T34 between the third lens and the fourth lens on the optical axis, and the spacing distance T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.8 < EP34 / (T34 + T45) < 2.5; by controlling the sum of the spacing distances between the third lens and the fourth lens and between the fourth lens and the fifth lens on the optical axis, and the ratio of this sum to the spacing distance between the third spacer and the fourth spacer in the optical axis direction, the dimensional uniformity of the edge and center of the fourth lens and the air gaps before and after the fourth lens are controlled, which is beneficial to reducing the sensitivity of the fourth lens assembly tilt and improving the stability of the fourth lens assembly performance.

[0053] The relationship between the tilt and sensitivity of the lens will be further described below with reference to Table 1. Table 1 shows the sensitivities of the tilt of the fourth lens and the third lens of three camera lenses to the field curvature in the T direction. Among them, for lens 1, d0m / tan(Semi-FOV) = 4.5, EP23 / (T23 + T34) = 1.01, EP34 / (T34 + T45) = 1.69; for lens 2, d0m / tan(Semi-FOV) = 4.5, EP23 / (T23 + T34) = 2.49, EP34 / (T34 + T45) = 3.59; for lens 3, d0m / tan(Semi-FOV) = 4.5, EP23 / (T23 + T34) = 0.62, EP34 / (T34 + T45) = 0.78.

[0054] In Table 1, the signs "+" and "-" of "+3'" and "-3'" represent the tilt directions of the lens, and "F" in "0.1F", "0.2F", "0.3F", "0.4F", "0.5F", "0.6F", "0.7F", "0.8F", "0.9F" and "1.0F" represents the field of view, and the unit of the peak influence data is %.

[0055] For lens 1, within a field of view of 0.1F to 1.0F, when the tilt angle of the third lens deviates by +3' from the design value, the impact of the tilted third lens on the peak MTF field of view ranges from 0.28% to 1.68%, showing relatively stable data with all values ​​being positive. Within a field of view of 0.1F to 1.0F, when the tilt angle of the third lens deviates by -3' from the design value, the impact of the tilted third lens on the peak MTF field of view ranges from 0.1% to -1.75%, showing relatively stable data. Within a field of view of 0.1F to 1.0F, when the tilt angle of the fourth lens deviates by +3' from the design value, the impact of the tilted fourth lens on the peak MTF field of view... The impact of the MTF field-of-view peak value ranges from -0.47% to -5.45%. Specifically, in the 0.1F to 0.7F field of view, the impact of tilting the fourth lens on the MTF field-of-view peak value ranges from -0.47% to -2.16%, showing relatively stable data. In the 0.8F to 1.0F field of view, the impact of tilting the fourth lens on the MTF field-of-view peak value ranges from -4.59% to -5.45%. In the 0.1F to 1.0F field of view, when the tilt angle of the fourth lens deviates from the design value by -3', the impact of tilting the fourth lens on the MTF field-of-view peak value ranges from 0.53% to 5.77%, all of which are positive values.

[0056] For lens 2, within a field of view of 0.1F to 1.0F, when the tilt angle of the third lens deviates from the design value by +3', the impact of the tilted third lens on the peak MTF field of view ranges from -0.73% to 1.19%, with some data being positive and others positive. Within a field of view of 0.1F to 1.0F, when the tilt angle of the third lens deviates from the design value by -3', the impact of the tilted third lens on the peak MTF field of view ranges from -21.67% to 14.23%. The data fluctuates significantly. Within a field of view of 0.1F to 1.0F, when the tilt angle of the fourth lens deviates by +3' from the design value, the effect of tilting the fourth lens on the peak MTF field of view ranges from -17.33% to 14.12%, showing significant fluctuations. Within a field of view of 0.1F to 1.0F, when the tilt angle of the fourth lens deviates by -3' from the design value, the effect of tilting the fourth lens on the peak MTF field of view ranges from -20.00% to 6.00%, also showing significant fluctuations.

[0057] For lens 3, when the tilt angle of the third lens deviates from the design value by +3' at a field of view from 0.1F to 1.0F, the impact of the tilt of the third lens on the MTF field peak is between -10.00% and 1.07%, with large data fluctuations; when the tilt angle of the third lens deviates from the design value by -3' at a field of view from 0.1F to 1.0F, the impact of the tilt of the third lens on the MTF field peak is between -7.00% and 0%, and the data are all negative; when the tilt angle of the fourth lens deviates from the design value by +3' at a field of view from 0.1F to 1.0F, the impact of the tilt of the fourth lens on the MTF field peak is between -5.00% and 73.50%, with large data fluctuations; when the tilt angle of the fourth lens deviates from the design value by -3' at a field of view from 0.1F to 1.0F, the impact of the tilt of the fourth lens on the MTF field peak is between -10.77% and 3.61%, with a large data fluctuation range and some data being negative.

[0058] Compared with lens 2 and lens 3, the sensitivity data of the MTF field peak after the tilt of the third and fourth lenses of lens 1 are stable, and the impact of adjusting the field of view on the sensitivity peak is small. It can be seen that when the camera lens satisfies "4.2mm < d0m / tan(Semi-FOV) < 5.0mm", "0.9 < EP23 / (T23+T34) < 1.8" and "0.8 < EP34 / (T34+T45) < 2.6", the impact of the tilt of the third and fourth lenses of lens 1 on the sensitivity data of the MTF field peak is small, and the larger impact on the sensitivity data is also the peripheral field of view.

[0059]

[0060] Table 1

[0061] In an exemplary embodiment, the outer diameter D0m of the image-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, and half of the maximum field angle Semi-FOV of the camera lens satisfy: 85.1° < (D0m / D0s) * Semi-FOV < 90.6°. By controlling the ratio of the outer diameter of the image-side end face of the lens barrel to the outer diameter of the object-side end face of the lens barrel and the product of the ratio and half of the maximum field angle of the camera lens, the size range of the bottom of the lens barrel is controlled, which helps to miniaturize the lens.

[0062] In an exemplary embodiment, the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the maximum thickness CP4 of the fourth spacer, and the central thickness CT4 of the fourth lens satisfy: 0.7 < (EP34 + CP4) / CT4 < 1.2. By controlling the sum of the spacing distance between the third spacer and the fourth spacer in the optical axis direction and the maximum thickness of the fourth spacer, and the ratio of the sum to the central thickness of the fourth lens, the relative uniformity of the central and edge assembly thicknesses of the fourth lens is controlled, which is beneficial to the molding stability of the fourth lens.

[0063] In an exemplary embodiment, the effective focal length f4 of the fourth lens, the distance SAG42 on the optical axis between the intersection of the image side of the fourth lens on the optical axis and the vertex of the effective semi-aperture of the image side of the fourth lens, and the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction satisfy: 1.8 < f4 / (|SAG42| + EP34) < 3.2. By controlling the ratio of the effective focal length of the fourth lens to the sum of the relevant dimensions of the image side of the fourth lens and the spacing distance between the third spacer and the fourth spacer in the optical axis direction, the range of marginal rays of the fourth lens is controlled, and stray light is avoided while ensuring optical parameters, thereby ensuring the image quality of the image plane.

[0064] In an exemplary embodiment, the distance SAG31 on the optical axis between the intersection of the object side of the third lens on the optical axis and the vertex of the effective semi-aperture of the object side of the third lens, the central thickness CT3 of the third lens, and the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction satisfy: 0.9 < (|SAG31| + CT3) / EP23 < 1.5. By controlling the sum of the relevant dimensions of the object side of the third lens and the central thickness of the third lens, and the ratio of the sum to the spacing distance between the second spacer and the third spacer in the optical axis direction, the relative uniformity of the central and edge assembly thicknesses of the third lens and the curvature of the object side are controlled, which is beneficial to the molding stability of the third lens.

[0065] In an exemplary embodiment, the inner diameter d3s of the object side of the third spacer, the inner diameter d2s of the object side of the second spacer, and the refractive index N3 of the third lens satisfy: 1.8 < d3s / d2s * N3 < 2.2. By controlling the ratio of the inner diameter of the object side of the third spacer to the inner diameter of the object side of the second spacer and the product of the ratio and the refractive index of the third lens, the purpose of controlling the divergence range of marginal rays of the third lens is achieved, the relative illuminance of the marginal field of view is controlled, and the generation of vignetting is avoided.

[0066] In an exemplary embodiment, the inner diameter d4s of the object side surface of the fourth spacer, the inner diameter d3s of the object side surface of the third spacer, and the refractive index N4 of the fourth lens satisfy: 1.7 < d4s / d3s * N4 < 2.5. By controlling the ratio of the inner diameter of the object side surface of the fourth spacer to the inner diameter of the object side surface of the third spacer and the product of this ratio and the refractive index of the fourth lens, the purpose of controlling the divergence range of the marginal rays of the fourth lens is achieved, the relative illuminance of the marginal field of view is controlled, and the generation of vignetting is avoided.

[0067] In an exemplary embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: -4.2 < f1 / f5 < -2.1; the effective focal length f3 of the third lens and the effective focal length f of the imaging lens satisfy: -5.8 < f3 / f < -2.2; the effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy: 1.6 < f2 / f4 < 2.4. By controlling the ratio of the effective focal lengths of the first lens to the fifth lens, the ratio of the effective focal length of the third lens to the imaging lens, and the ratio of the effective focal lengths of the second lens to the fourth lens, the purpose of controlling the field angle of the imaging lens is achieved, which is beneficial to the miniaturization of the lens.

[0068] In an exemplary embodiment, the inner diameter d0s of the object side end surface of the lens barrel and the effective focal length f of the imaging lens satisfy: 0.9 < d0s / f < 1.3. By controlling the ratio of the inner diameter of the object side end surface of the lens barrel to the effective focal length of the imaging lens, it is beneficial to control the size of the object side end surface of the lens barrel and the overall size of the imaging lens.

[0069] In an exemplary embodiment, the outer diameter D4s of the object side surface of the fourth spacer, the effective semi-aperture DT42 of the image side surface of the fourth lens, and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 0.9 < (D4s - DT42) / d4s < 1.7. By controlling the difference in the bearing position between the fourth lens and the fourth spacer and the inner diameter of the object side surface of the fourth spacer, it is beneficial for the bearing between the fourth lens and the fifth lens and is conducive to the assembly stability.

[0070] In an exemplary embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the inner diameter d2s of the object side surface of the second spacer, and the inner diameter d3s of the object side surface of the third spacer satisfy: -2.8 < f3 / f2 / (d3s / d2s) < -1.4. By controlling the ratio of the effective focal lengths of the second lens to the third lens and the ratio of the inner diameter of the object side surface of the third spacer to the inner diameter of the object side surface of the second spacer, and controlling the ratio of these two ratios, the range of the marginal rays of the lens is controlled, stray light is avoided while ensuring the optical parameters, and the image quality of the image plane is ensured.

[0071] In an exemplary embodiment, when the camera lens includes a fifth spacer, the outer diameter D4m of the image side of the fourth spacer, the outer diameter D5m of the image side of the fifth spacer, and the spacing distance EP45 between the fourth spacer and the fifth spacer in the optical axis direction satisfy: 18.4 < (D4m + D5m) / EP45 < 26.2. By controlling the ratio of the sum of the outer diameter of the image side of the fourth spacer and the outer diameter of the image side of the fifth spacer to the spacing distance between the fourth spacer and the fifth spacer in the optical axis direction, the uniformity of the edge structure of the fifth lens is controlled, which is beneficial to the stability of the fifth lens molding and the stability of the bearing of the front and rear lenses (the front and rear lenses can be understood as the fourth lens and the sixth lens).

[0072] In an exemplary embodiment, the curvature radius R7 of the object side of the fourth lens, the curvature radius R8 of the image side of the fourth lens, the curvature radius R3 of the object side of the second lens, and the curvature radius R4 of the image side of the second lens satisfy: -1.1 < (R7 + R8) / (R3 - R4) < -0.5; the outer diameter D4m of the image side of the fourth spacer and the outer diameter D2s of the object side of the second spacer satisfy: 1.0 < D4m / D2s < 1.9. By controlling the proportional relationship of the curvature radii of the fourth lens and the second lens, and controlling the proportional relationship of the outer diameters of the object sides of the fourth spacer and the second spacer, the surface shape of the centers of the second lens and the fourth lens and the step difference in the radial direction between the second lens and the fourth lens can be controlled, which is beneficial to the refraction of light and controlling that the radial width is not too large.

[0073] In an exemplary embodiment, when the spacer group further includes a sixth spacer, each of the object side and the image side of the fifth lens has at least one inflection point, and the object side of the sixth lens has at least one inflection point; the distance YC52 from the inflection point closest to the optical axis on the image side of the fifth lens to the optical axis, the distance YC61 from the inflection point closest to the optical axis on the object side of the sixth lens to the optical axis, and the spacing distance EP46 between the fourth spacer and the sixth spacer in the optical axis direction satisfy: 1.4 < (YC52 + YC61) / EP46 < 2.2. By controlling the sum of the distance from the inflection point closest to the optical axis on the image side of the fifth lens to the optical axis and the distance from the inflection point closest to the optical axis on the object side of the sixth lens to the optical axis, and the ratio of the sum to the spacing distance between the fourth spacer and the sixth spacer in the optical axis direction, the overall structural uniformity of the fifth lens and the sixth lens is controlled. On the one hand, it is beneficial to molding, and on the other hand, it controls that the effective diameter of the sixth lens does not exceed the bottom of the lens barrel to prevent the sixth lens from being scratched.

[0074] An inflection point can be understood as the position where the surface bending direction changes, that is, the surface bending direction of the lens changes at the inflection point.

[0075] In an exemplary embodiment, the aperture number Fno of the camera lens ranges from 1.9 to 2.6.

[0076] A second aspect of this application provides a camera lens that may include an optical lens group, which may sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens along the optical axis from the object side to the image side. The first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens all have optical power.

[0077] The camera lens may include a group of spacers, which may include a third spacer and a fourth spacer. The third spacer is positioned between and in contact with the image-side surface of the third lens and the fourth lens, for example, the third spacer is at least partially in contact with the image-side surface of the third lens. The fourth spacer is positioned between and in contact with the image-side surface of the fourth lens and the fifth lens, for example, the fourth spacer is at least partially in contact with the image-side surface of the fourth lens.

[0078] The spacing EP34 between the third and fourth spacers along the optical axis, the maximum thickness CP4 of the fourth spacer, and the center thickness CT4 of the fourth lens satisfy the condition: 0.7 < (EP34 + CP4) / CT4 < 1.2. By controlling the sum of the spacing between the third and fourth spacers along the optical axis and the maximum thickness of the fourth spacer, and the ratio of this sum to the center thickness of the fourth lens, the relative uniformity of the assembly thickness at the center and edges of the fourth lens is controlled, which is beneficial to the forming stability of the fourth lens.

[0079] A third aspect of this application provides a camera lens that may include an optical lens group, which may sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens along the optical axis from the object side to the image side. The first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens all have optical power.

[0080] The camera lens may include a group of spacers, which may include a second spacer and a third spacer. The second spacer is positioned between the image-side surface of the second lens and the third lens and is in at least partial contact with the image-side surface of the second lens, for example, the second spacer is in at least partial contact with the image-side surface of the second lens. The third spacer is positioned between the image-side surface of the third lens and a fourth lens and is in contact with the image-side surface of the third lens, for example, the third spacer is in at least partial contact with the image-side surface of the third lens.

[0081] The distance SAG31 between the intersection of the object-side surface of the third lens and the effective half-aperture vertex of the object-side surface of the third lens, the center thickness CT3 of the third lens, and the spacing EP23 between the second and third spacers in the optical axis direction satisfy: 0.9 < (|SAG31| + CT3) / EP23 < 1.5. By controlling the sum of the relevant dimensions of the object-side surface of the third lens and the center thickness of the third lens, and the ratio of this sum to the spacing distances of the second and third spacers in the optical axis direction, the relative uniformity of the assembly thickness at the center and edge of the third lens and the curvature of the object-side surface are controlled, which is beneficial to the forming stability of the third lens.

[0082] Those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses and spacers constituting the camera lens can be changed to obtain the various results and advantages described in this specification.

[0083] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the camera lens applicable to the above-described embodiments.

[0084] Example 1

[0085] The following is for reference Figure 3 The camera lens according to Embodiment 1 of this application is described.

[0086] like Figure 3 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel.

[0087] The optical 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. These lenses are arranged sequentially along the optical axis from the object side to the image side. The aperture stop STO can be positioned on the object side of the object side of the first lens E1.

[0088] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. A filter or protective glass has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface S15 (not shown).

[0089] The spacer assembly includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. Both the optical lens assembly and the spacer assembly are housed within the lens barrel P0. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel P0, thus enhancing the structural stability of the camera lens.

[0090] Table 2 shows the basic parameters of the camera lens in Example 1, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0091]

[0092]

[0093] Table 2

[0094] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0095]

[0096] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 2 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 3 gives the higher-order coefficients A4, A6, A8, A12 that can be used for each aspherical surface S1-S12 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 and A 22 .

[0097] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 A22 S1 -4.71E-02 -1.22E-03 -5.45E-05 6.14E-05 -9.13E-06 -1.65E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -1.08E-01 -5.67E-04 2.27E-04 -2.05E-04 -1.30E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 -1.30E-01 -1.08E-02 -2.63E-03 -1.64E-03 -6.98E-04 -2.06E-04 -4.83E-05 0.00E+00 0.00E+00 0.00E+00 S4 -1.83E-01 -8.94E-03 -1.52E-03 -2.20E-03 -3.10E-04 1.07E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 -1.58E-01 1.45E-02 5.76E-03 -1.08E-03 1.37E-03 4.55E-04 -1.97E-04 -8.70E-05 0.00E+00 0.00E+00 S6 -1.05E-01 -9.70E-05 8.36E-03 -7.36E-04 1.50E-03 2.14E-04 -2.13E-04 0.00E+00 0.00E+00 0.00E+00 S7 -2.60E-02 -5.33E-02 1.75E-02 1.87E-03 -3.54E-04 -3.63E-04 -6.24E-04 0.00E+00 0.00E+00 0.00E+00 S8 -9.42E-02 -3.74E-02 3.69E-02 3.32E-03 2.04E-03 -1.35E-03 -6.77E-04 -3.41E-04 0.00E+00 0.00E+00 S9 -3.60E-01 -2.31E-01 9.52E-02 -1.52E-02 8.43E-03 -2.06E-03 -4.36E-04 -6.57E-04 2.36E-04 0.00E+00 S10 -1.06E+00 -6.14E-02 1.06E-01 -3.90E-02 9.83E-03 -4.44E-03 -8.68E-04 4.11E-04 -5.43E-04 2.07E-04 S11 -1.73E+00 5.07E-01 -1.19E-01 1.22E-02 7.27E-03 6.12E-04 -3.43E-03 -9.38E-04 7.98E-04 0.00E+00 S12 -2.17E+00 4.09E-01 -1.72E-01 3.76E-02 -1.46E-02 1.10E-02 -1.93E-03 2.19E-03 -1.02E-04 0.00E+00

[0098] Table 3

[0099] Other parameters for Example 1 are shown in Tables 10 and 11.

[0100] Example 2

[0101] The following is for reference Figure 4 Describes a camera lens according to Embodiment 2 of this application.

[0102] like Figure 4As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 1. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fourth auxiliary spacer P4b, and a fifth spacer P5.

[0103] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 1. That is, the basic parameter table of the camera lens in this embodiment is the same as that in Table 2, and the aspherical coefficient table is the same as that in Table 3. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some of the elements in the spacer group are different. For details, please refer to the data corresponding to Embodiment 2 in Table 11.

[0104] Figure 5A The on-axis chromatic aberration curve of the camera lens of Embodiment 1 or 2 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 5B The astigmatism curves of the camera lens of Embodiment 1 or 2 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 5C The distortion curves of the camera lens in Embodiment 1 or 2 are shown, representing the distortion magnitude values ​​corresponding to different image heights. Figure 5D The magnification chromatic aberration curves of the camera lens in Embodiment 1 or 2 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 5A to 5D It can be seen that the camera lens of Embodiment 1 or 2 can achieve good imaging quality.

[0105] Example 3

[0106] The following is for reference Figure 6 The camera lens according to Embodiment 3 of this application is described.

[0107] like Figure 6 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel.

[0108] The optical 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. These lenses are arranged sequentially along the optical axis from the object side to the image side. The aperture stop STO can be positioned on the object side of the object side of the first lens E1.

[0109] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. A filter or protective glass has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface S15 (not shown).

[0110] The spacer assembly includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. Both the optical lens assembly and the spacer assembly are housed within the lens barrel P0. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel P0, thus enhancing the structural stability of the camera lens.

[0111] Table 4 shows the basic parameters of the camera lens in Example 3, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0112]

[0113] Table 4

[0114] Table 5 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for the aspherical surfaces S1-S12 in Example 3. 10 A 12 A 14 A 16 A 18 A 20 and A 22 The formula for aspherical surfaces can be found in formula (1) from the above embodiments.

[0115] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 A22 S1 -4.43E-02 -1.51E-03 -9.79E-05 4.84E-05 -6.99E-06 -2.78E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 -1.03E-01 -1.41E-03 2.09E-04 -1.77E-04 -1.24E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 -1.31E-01 -1.18E-02 -2.71E-03 -1.68E-03 -7.62E-04 -2.42E-04 -6.56E-05 0.00E+00 0.00E+00 0.00E+00 S4 -1.88E-01 -9.92E-03 -1.81E-03 -2.31E-03 -3.58E-04 1.04E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 -1.62E-01 1.60E-02 5.30E-03 -5.71E-04 1.53E-03 4.26E-04 -2.55E-04 -9.93E-05 0.00E+00 0.00E+00 S6 -1.08E-01 -3.11E-04 9.63E-03 1.25E-05 1.71E-03 1.45E-04 -3.70E-04 0.00E+00 0.00E+00 0.00E+00 S7 -2.00E-02 -5.36E-02 1.99E-02 2.10E-03 7.98E-05 -6.49E-04 -8.45E-04 0.00E+00 0.00E+00 0.00E+00 S8 -8.47E-02 -3.93E-02 3.42E-02 3.11E-03 3.17E-03 -1.40E-03 -6.01E-04 -4.56E-04 0.00E+00 0.00E+00 S9 -3.15E-01 -2.35E-01 8.78E-02 -1.35E-02 1.06E-02 -2.88E-03 -5.49E-04 -7.85E-04 4.12E-04 0.00E+00 S10 -1.00E+00 -7.76E-02 1.02E-01 -3.32E-02 9.25E-03 -5.28E-03 -2.20E-04 7.07E-04 -4.71E-04 6.04E-05 S11 -1.75E+00 5.04E-01 -1.09E-01 7.08E-03 7.26E-03 2.35E-03 -3.85E-03 -9.83E-04 8.91E-04 0.00E+00 S12 -2.11E+00 3.98E-01 -1.52E-01 2.94E-02 -1.39E-02 1.16E-02 -1.67E-03 1.35E-03 -3.03E-04 0.00E+00

[0116] Table 5

[0117] Other parameters for Example 3 are shown in Tables 10 and 11.

[0118] Example 4

[0119] The following is for reference Figure 7 The camera lens according to Embodiment 4 of this application is described.

[0120] like Figure 7As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fourth auxiliary spacer P4b, and a fifth spacer P5.

[0121] The structure of the optical lens group in this embodiment is the same as that in Embodiment 3. That is, the basic parameter table of the camera lens in this embodiment is the same as that in Table 4, and the aspherical coefficient table is the same as that in Table 5. The difference between this embodiment and Embodiment 3 is that the structural dimensions of at least some of the elements in the spacer group are different. For details, please refer to the data corresponding to Embodiment 4 in Table 11.

[0122] Figure 8A The on-axis chromatic aberration curve of the camera lens of Embodiment 3 or 4 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 8B The astigmatism curves of the camera lens in Embodiment 3 or 4 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 8C The distortion curves of the camera lens in Embodiment 3 or 4 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 8D The magnification chromatic aberration curves of the camera lens in Embodiment 3 or 4 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 8A to 8D It can be seen that the camera lens of embodiment 3 or 4 can achieve good imaging quality.

[0123] Example 5

[0124] The following is for reference Figure 9 The camera lens according to Embodiment 5 of this application is described.

[0125] like Figure 9 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel.

[0126] The optical 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. These lenses are arranged sequentially along the optical axis from the object side to the image side. The aperture stop STO can be positioned on the object side of the object side of the first lens E1.

[0127] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. A filter or protective glass has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging surface S15 (not shown).

[0128] The spacer assembly includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. Both the optical lens assembly and the spacer assembly are housed within the lens barrel P0. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel P0, thus enhancing the structural stability of the camera lens.

[0129] Table 6 shows the basic parameters of the camera lens in Example 5, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0130] Table 6

[0131] Table 7 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for the aspherical surfaces S1-S12 in Example 5. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 The formula for aspherical surfaces can be found in formula (1) of Example 1 above.

[0132]

[0133]

[0134] Table 7

[0135] Other parameters for Example 5 are shown in Tables 10 and 11.

[0136] Example 6

[0137] The following is for reference Figure 10 The camera lens according to Embodiment 6 of this application is described.

[0138] like Figure 10 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fourth auxiliary spacer P4b, and a fifth spacer P5.

[0139] The structure of the optical lens group in this embodiment is the same as that in Embodiment 5. That is, the basic parameter table of the camera lens in this embodiment is the same as that in Table 6, and the aspherical coefficient table is the same as that in Table 7. The difference between this embodiment and Embodiment 5 is that the structural dimensions of at least some of the elements in the spacer group are different. For details, please refer to the data corresponding to Embodiment 6 in Table 11.

[0140] Figure 11A The on-axis chromatic aberration curve of the camera lens of Embodiment 5 or 6 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 11B The astigmatism curves of the camera lens in Embodiment 5 or 6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 11C The distortion curves of the camera lens in Embodiment 5 or 6 are shown, representing the distortion magnitude values ​​corresponding to different image heights. Figure 11D The magnification chromatic aberration curves of the camera lens in Embodiment 5 or 6 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 11A to 11D It can be seen that the camera lens of embodiment 5 or 6 can achieve good imaging quality.

[0141] Example 7

[0142] The following is for reference Figure 12 The camera lens according to Embodiment 7 of this application is described.

[0143] like Figure 12 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel.

[0144] The optical 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. These lenses are arranged sequentially along the optical axis from the object side to the image side. The aperture stop STO can be positioned on the object side of the object side of the first lens E1.

[0145] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The filter or protective glass has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S15 and is finally imaged on the imaging surface S15 (not shown).

[0146] The spacer assembly includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. Both the optical lens assembly and the spacer assembly are housed within the lens barrel P0. The spacers prevent excess light from entering the next lens during the imaging process, while also ensuring better contact between the lens and the lens barrel P0, thus enhancing the structural stability of the camera lens.

[0147] Table 8 shows the basic parameters of the camera lens in Example 7, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0148]

[0149] Table 8

[0150] Table 9 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for the aspherical surfaces S1-S12 in Example 7. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 The formula for aspherical surfaces can be found in formula (1) of Example 1 above.

[0151]

[0152]

[0153] Table 9

[0154] Other parameters for Example 7 are shown in Tables 10 and 11.

[0155] Example 8

[0156] The following is for reference Figure 13 The camera lens according to Embodiment 8 of this application is described.

[0157] like Figure 13 As shown, the camera lens includes an optical lens group, a spacer group, and a lens barrel. The structure of the optical lens group is the same as that of the optical lens group in Embodiment 3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5.

[0158] The structure of the optical lens group in this embodiment is the same as that of the optical lens group in Embodiment 7. That is, the basic parameter table of the camera lens in this embodiment is the same as that in Table 8, and the aspherical coefficient table is the same as that in Table 9. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some of the elements in the spacer group are different. For details, please refer to the data corresponding to Embodiment 8 in Table 11.

[0159] Figure 14A The on-axis chromatic aberration curve of the camera lens of Embodiment 7 or 8 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the camera lens. Figure 14B The astigmatism curves of the camera lens of Embodiment 7 or 8 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 14C The distortion curves of the camera lens of Embodiment 7 or 8 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 14D The magnification chromatic aberration curves of the camera lens in Embodiment 7 or 8 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 14A to 14D It can be seen that the camera lens of embodiment 7 or 8 can achieve good imaging quality.

[0160] Table 10 shows the values ​​of optical parameters such as Semi-FOV, Fno, DT42, SAG31, SAG42, YC52, and YC61 for each embodiment in Examples 1-8.

[0161]

[0162] Table 10

[0163] Table 11 shows the values ​​of parameters d2s, D2s, d3s, d4s, D4s, D4m, D5m, d0s, d0m, D0s, D0m, EP23, EP34, CP4, EP45, and EP46 for each embodiment in Examples 1-8. Some of these parameters can be referenced from... Figure 1 and Figure 2 The measurements were obtained using the markings shown, and the units for all parameters listed in Table 11 are in mm.

[0164]

[0165]

[0166] Table 11

[0167] Table 12 shows the values ​​of the conditional expressions for each of the embodiments in Examples 1-8.

[0168] Conditional / Example 1 2 3 4 5 6 7 8 d0m / tan(Semi-FOV) 4.47 4.49 4.41 4.46 4.59 4.48 4.94 4.89 EP23 / (T23+T34) 1.01 1.01 1.44 1.21 1.62 1.48 1.19 1.15 EP34 / (T34+T45) 1.69 0.99 1.93 1.20 2.42 1.67 1.59 1.45 (D0m / D0s)*Semi-FOV) 89.81 89.58 90.30 89.57 89.13 90.51 85.24 85.24 (EP34+CP4) / CT4 1.06 1.02 0.97 1.04 0.93 1.00 0.85 0.77 f4 / (|SAG42|+EP34) 2.29 2.92 2.46 3.05 1.94 2.27 1.85 1.92 (|SAG31|+CT3) / EP23 1.38 1.38 1.23 1.46 1.36 1.48 1.06 1.10 d3s / d2s*N3 2.05 2.05 2.07 2.03 2.00 1.94 2.02 2.00 d4s / d3s*N4 2.06 2.40 1.98 2.05 1.80 2.29 1.88 1.84 f1 / f5 -2.67 -2.67 -2.38 -2.38 -4.06 -4.06 -2.23 -2.23 f3 / f -5.66 -5.66 -4.86 -4.86 -2.66 -2.66 -2.39 -2.39 f2 / f4 2.15 2.15 2.23 2.23 1.72 1.72 1.93 1.93 d0s / f 1.10 1.10 1.12 1.17 1.02 1.02 1.03 1.03 (D4s-DT42) / d4s 1.38 1.12 1.27 1.12 1.47 1.08 1.57 1.56 f3 / f2 / (d3s / d2s) -2.61 -2.61 -2.10 -2.14 -1.67 -1.72 -1.53 -1.55 (D4m+D5m) / EP45 25.22 23.20 23.22 21.19 20.92 18.51 26.11 25.41 (R7+R8) / (R3-R4) -0.71 -0.71 -0.68 -0.68 -1.00 -1.00 -0.99 -0.99 D4m / D2s 1.83 1.17 1.77 1.14 1.79 1.23 1.81 1.20 (YC52+YC61) / EP46 2.00 1.93 2.09 2.04 1.56 1.50 1.55 1.55

[0169] Table 12

[0170] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with a camera lens as described above.

[0171] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A camera lens, characterized in that, include: The optical lens group, along the optical axis from the object side to the image side, includes the following in sequence: A first lens with positive optical power has a convex object-side surface. A second lens with positive optical power has a convex object-side surface and a convex image-side surface; A third lens with negative optical power has a concave object side and a convex image side. The fourth lens with positive optical power has a concave object side and a convex image side. A fifth lens with negative optical power has a concave image-side surface; and The sixth lens with negative optical power has a convex object side and a concave image side. The refractive index of the third lens is greater than that of the second lens and the fourth lens, the refractive index of the fourth lens is less than that of the third lens and the fifth lens, and the object side and image side of the fifth lens each have at least one inflection point. A spacer assembly includes a second spacer, a third spacer, and a fourth spacer, wherein the second spacer is positioned on the image-side surface of the second lens and contacts the image-side surface of the second lens, the third spacer is positioned on the image-side surface of the third lens and contacts the image-side surface of the third lens, and the fourth spacer is positioned on the image-side surface of the fourth lens and contacts the image-side surface of the fourth lens. A lens barrel that houses the optical lens group and the spacer group; The number of lenses with optical power in the camera lens is six; The inner diameter d0m of the image-side end face of the lens barrel and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following condition: 4.41mm≤d0m / tan(Semi-FOV)≤4.94mm; The spacing EP23 between the second spacer and the third spacer in the optical axis direction, the spacing T23 between the second lens and the third lens in the optical axis, and the spacing T34 between the third lens and the fourth lens in the optical axis satisfy: 1.01≤EP23 / (T23+T34)≤1.62; The spacing EP34 between the third spacer and the fourth spacer in the optical axis direction, the spacing T34 between the third lens and the fourth lens in the optical axis, and the spacing T45 between the fourth lens and the fifth lens in the optical axis satisfy: 0.99≤EP34 / (T34+T45)≤2.42; The effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy: -4.06≤f1 / f5≤-2.

23.

2. The camera lens according to claim 1, characterized in that, The outer diameter D0m of the image-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, and half of the maximum field of view (Semi-FOV) of the camera lens satisfy the following condition: 85.24°≤(D0m / D0s). Semi-FOV ≤ 90.51°.

3. The camera lens according to claim 1, characterized in that, The spacing EP34 between the third spacer and the fourth spacer in the optical axis direction, the maximum thickness CP4 of the fourth spacer, and the center thickness CT4 of the fourth lens satisfy: 0.77≤(EP34+CP4) / CT4≤1.

06.

4. The camera lens according to claim 1, characterized in that, The effective focal length f4 of the fourth lens, the distance SAG42 on the optical axis between the intersection of the image-side surface of the fourth lens and the vertex of the effective half-aperture of the image-side surface of the fourth lens, and the spacing EP34 between the three spacers and the fourth spacer in the optical axis direction satisfy: 1.8 <f4 / (|SAG42|+EP34)≤3.05。 5. The camera lens according to claim 1, characterized in that, The distance SAG31 between the intersection of the object side surface of the third lens on the optical axis and the effective half-aperture vertex of the object side surface of the third lens, the center thickness CT3 of the third lens, and the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction satisfy: 1.06≤(|SAG31|+CT3) / EP23<1.

5.

6. The camera lens according to claim 1, characterized in that, The inner diameter d3s of the object-side surface of the third spacer, the inner diameter d2s of the object-side surface of the second spacer, and the refractive index N3 of the third lens satisfy: 1.94 ≤ d3s / d2s N3≤2.

07.

7. The camera lens according to claim 1, characterized in that, The inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d3s of the object-side surface of the third spacer, and the refractive index N4 of the fourth lens satisfy: 1.80 ≤ d4s / d3s N4≤2.

40.

8. The camera lens according to claim 1, characterized in that, The effective focal length f3 of the third lens and the effective focal length f of the camera lens satisfy the following condition: -5.66≤f3 / f≤-2.39; The effective focal length f2 of the second lens and the effective focal length f4 of the fourth lens satisfy: 1.72≤f2 / f4≤2.

23.

9. The camera lens according to claim 1, characterized in that, The inner diameter d0s of the object-side end face of the lens barrel and the effective focal length f of the camera lens satisfy the following condition: 1.02≤d0s / f≤1.

17.

10. The camera lens according to claim 1, characterized in that, The outer diameter D4s of the object side of the fourth spacer, the effective half-aperture DT42 of the image side of the fourth lens, and the inner diameter d4s of the object side of the fourth spacer satisfy: 1.08≤(D4s-DT42) / d4s≤1.

57.

11. The camera lens according to claim 1, characterized in that, The effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the inner diameter d2s of the object side of the second spacer, and the inner diameter d3s of the object side of the third spacer satisfy: -2.61≤f3 / f2 / (d3s / d2s)≤-1.

53.

12. The camera lens according to any one of claims 1-11, characterized in that, The spacer assembly further includes a fifth spacer disposed on the image-side surface of the fifth lens and in at least partial contact with the image-side surface of the fifth lens; The outer diameter D4m of the image side of the fourth spacer, the outer diameter D5m of the image side of the fifth spacer, and the spacing EP45 between the fourth and fifth spacers in the optical axis direction satisfy: 18.51≤(D4m+D5m) / EP45≤26.

11.

13. The camera lens according to any one of claims 1-11, characterized in that, The radius of curvature R7 of the object side of the fourth lens, the radius of curvature R8 of the image side of the fourth lens, the radius of curvature R3 of the object side of the second lens, and the radius of curvature R4 of the image side of the second lens satisfy: -1.00≤(R7+R8) / (R3-R4)≤-0.68; The outer diameter D4m of the image side of the fourth spacer and the outer diameter D2s of the object side of the second spacer satisfy the following condition: 1.14≤D4m / D2s≤1.

83.

14. The camera lens according to any one of claims 1-11, characterized in that, The spacer assembly further includes a sixth spacer disposed on the image-side surface of the sixth lens and in at least partial contact with the image-side surface of the sixth lens, wherein the object-side surface of the sixth lens has at least one inflection point. The distance YC52 from the nearest inflection point on the image side of the fifth lens to the optical axis, the distance YC61 from the nearest inflection point on the object side of the sixth lens to the optical axis, and the spacing EP46 between the fourth spacer and the sixth spacer in the optical axis direction satisfy: 1.50≤(YC52+YC61) / EP46≤2.09.

Images