Camera lens group

Abstract

The present application discloses a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with negative optical power, whose image side is concave; a diaphragm; a second lens with positive optical power, whose image side is convex; a third lens with optical power, whose image side is concave; a fourth lens with positive optical power, whose image side is convex; and a fifth lens with negative optical power, whose object side is convex and image side is concave; wherein, the maximum field of view FOV of the camera lens group satisfies: FOV > 114°; the maximum distortion of the camera lens group is within 8%.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more particularly, to a camera lens group. Background Art

[0002] A camera module is usually provided on portable devices such as mobile phones, so that the mobile phone has a camera function. An image sensor of Charge-coupled Device (CCD) type or Complementary Metal Oxide Semiconductor (CMOS) type is usually provided in the camera module, and a camera lens group is provided. The camera lens group can converge the light on the object side, and the imaging light travels along the optical path of the camera lens group and irradiates onto the image sensor. Then, the image sensor converts the optical signal into an electrical signal to form image data.

[0003] The camera lens group is an important component of an imaging device, and it has a great influence on the imaging quality. The camera lens group can be designed to have different performances, such as a wide-angle lens. A wide-angle lens is a camera lens group with a relatively large field of view angle. When using it to take pictures, obvious barrel distortion will occur, especially obvious distortion will appear in the edge area. If an ultra-wide-angle lens needs to be configured and used in an imaging device, this kind of distortion in imaging will be more obvious.

[0004] It is difficult to avoid this defect in traditional wide-angle lens designs. Usually, it is corrected by a terminal algorithm, but it is still expected that the camera lens group itself can have the effect of small distortion. Summary of the Invention

[0005] The present application provides a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with negative optical power, whose image side can be concave; a diaphragm; a second lens with positive optical power, whose image side can be convex; a third lens with optical power, whose image side can be concave; a fourth lens with positive optical power, whose image side can be convex; and a fifth lens with negative optical power, whose object side can be convex and image side can be concave; wherein, the maximum field of view angle FOV of the camera lens group can satisfy: FOV > 114°; the maximum distortion of the camera lens group can be within 8%.

[0006] In one embodiment, at least one aspherical mirror surface exists among the object side of the first lens to the image side of the fifth lens.

[0007] In one embodiment, the effective focal length f2 of the second lens and the total effective focal length f of the camera lens group can satisfy: 1.00 < f2 / f < 3.00.

[0008] In one embodiment, the combined focal length f12 of the first lens and the second lens and the distance BFL on the optical axis from the image side of the fifth lens to the imaging surface of the camera lens group may satisfy: 2.00 < f12 / BFL < 6.00.

[0009] In one embodiment, the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens may satisfy: 2.00 < (R9 + R10) / (R9 - R10) < 3.50.

[0010] In one embodiment, the radius of curvature R4 of the image side of the second lens and the radius of curvature R8 of the image side of the fourth lens may satisfy: 1.00 < R4 / R8 < 3.50.

[0011] In one embodiment, the radius of curvature R6 of the image side of the third lens and the total effective focal length f of the camera lens group may satisfy: 1.00 < R6 / f < 3.00.

[0012] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 3.00 < (CT4 + CT5) / (CT4 - CT5) < 8.00.

[0013] In one embodiment, the interval distance T12 of the first lens and the second lens on the optical axis and the air interval T45 of the fourth lens and the fifth lens on the optical axis may satisfy: 12.00 < T12 / T45 < 17.00.

[0014] In one embodiment, the axial distance SAG11 between the intersection of the object side of the first lens and the optical axis and the vertex of the effective radius of the object side of the first lens and the axial distance SAG12 between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens may satisfy: 4.00 < (SAG11 + SAG12) / (SAG11 - SAG12) < 6.00.

[0015] In one embodiment, the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens may satisfy: 4.00 < (ET1 + ET2) / (ET2 - ET1) < 6.00.

[0016] In one embodiment, the maximum effective radius DT51 of the object side of the fifth lens and the maximum effective radius DT52 of the image side of the fifth lens may satisfy: 6.00 < (DT51 + DT52) / (DT52 - DT51) < 9.00.

[0017] Another aspect of the present application provides an imaging lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with negative optical power, whose image side can be concave; a diaphragm; a second lens with positive optical power, whose image side can be convex; a third lens with optical power, whose image side can be concave; a fourth lens with positive optical power, whose image side can be convex; and a fifth lens with negative optical power, whose object side can be convex and image side is concave; wherein, the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens can satisfy: 4.00 < (ET1 + ET2) / (ET2 - ET1) < 6.00; the maximum distortion of the imaging lens group can be within 8%.

[0018] In one embodiment, the effective focal length f2 of the second lens and the total effective focal length f of the imaging lens group can satisfy: 1.00 < f2 / f < 3.00.

[0019] In one embodiment, the combined focal length f12 of the first lens and the second lens and the distance BFL on the optical axis from the image side of the fifth lens to the imaging plane of the imaging lens group can satisfy: 2.00 < f12 / BFL < 6.00.

[0020] In one embodiment, the radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens can satisfy: 2.00 < (R9 + R10) / (R9 - R10) < 3.50.

[0021] In one embodiment, the radius of curvature R4 of the image side of the second lens and the radius of curvature R8 of the image side of the fourth lens can satisfy: 1.00 < R4 / R8 < 3.50.

[0022] In one embodiment, the radius of curvature R6 of the image side of the third lens and the total effective focal length f of the imaging lens group can satisfy: 1.00 < R6 / f < 3.00.

[0023] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis can satisfy: 3.00 < (CT4 + CT5) / (CT4 - CT5) < 8.00.

[0024] In one embodiment, the interval distance T12 of the first lens and the second lens on the optical axis and the air interval T45 of the fourth lens and the fifth lens on the optical axis can satisfy: 12.00 < T12 / T45 < 17.00.

[0025] In one embodiment, the maximum field of view FOV of the imaging lens group can satisfy: FOV > 114°.

[0026] In one embodiment, the axial distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens and the axial distance SAG12 between the intersection of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens may satisfy: 4.00 < (SAG11 + SAG12) / (SAG11 - SAG12) < 6.00.

[0027] In one embodiment, the maximum effective radius DT51 of the object side surface of the fifth lens and the maximum effective radius DT52 of the image side surface of the fifth lens may satisfy: 6.00 < (DT51 + DT52) / (DT52 - DT51) < 9.00.

[0028] This application uses five lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial distance between each lens, etc., the above camera lens group has at least one beneficial effect such as wide angle and small distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In combination with the accompanying drawings, through the following detailed description of non-limiting embodiments, other features, objectives, and advantages of this application will become more obvious. In the drawings:

[0030] Figure 1 Shows a schematic structural diagram of a camera lens group according to Embodiment 1 of this application; Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 1;

[0031] Figure 3 Shows a schematic structural diagram of a camera lens group according to Embodiment 2 of this application; Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 2;

[0032] Figure 5 Shows a schematic structural diagram of a camera lens group according to Embodiment 3 of this application; Figures 6A to 6D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 3;

[0033] Figure 7 Shows a schematic structural diagram of a camera lens group according to Embodiment 4 of this application; Figures 8A to 8D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the camera lens group of Embodiment 4;

[0034] Figure 9 Shows a schematic structural diagram of a camera lens group according to Embodiment 5 of this application; Figures 10A to 10DThe axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 5 are respectively shown;

[0035] Figure 11 A schematic structural diagram of the camera lens group according to Embodiment 6 of the present application is shown; Figures 12A to 12D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 6 are respectively shown. Detailed implementation manners

[0036] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application and do not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0038] In the accompanying drawings, for ease of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0039] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface 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 object to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0040] It should also be understood that the terms "comprise", "comprising", "have", "including", and / or "containing", when used in this specification, denote the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features rather than an individual element in the list. In addition, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0041] Unless otherwise defined, all terms used herein (including technical and scientific terms) 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 (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0042] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0043] The features, principles, and other aspects of the present application will be described in detail below.

[0044] The camera lens group according to an exemplary embodiment of the present application may include, for example, five lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in sequence from the object side to the image side along the optical axis. An air gap may be provided between any two adjacent lenses among the first lens to the fifth lens.

[0045] In an exemplary embodiment, the first lens may have a negative optical power, and its image side may be concave; the second lens may have a positive optical power, and its image side may be convex; the third lens may have a positive or negative optical power, and its image side may be concave; the fourth lens may have a positive optical power, and its image side may be convex; the fifth lens may have a negative optical power, its object side may be convex, and its image side may be concave. Setting the optical power of the first lens to be negative and its image side to be concave is beneficial to improving the imaging angle of view of the camera lens group and broadening the field of view range of the camera lens group. The second lens with a positive optical power and a convex image side is beneficial to improving the maximum field of view angle of the camera lens group and helps to keep the light in the central field of view converge better on the imaging surface, thereby being beneficial to improving the overall image quality. The concave image side of the third lens can be beneficial to further improving the aberration correction ability of the camera lens group and improving the imaging quality of the camera lens group. The functions of the fourth lens with a positive optical power and the fifth lens with a negative optical power and a concave image side are similar to those of the second lens, and both are beneficial to ensuring that while stretching the FOV of the camera lens group, the camera lens group has a good aberration correction ability. In addition, the convex image side of the fourth lens and the convex object side of the fifth lens can be beneficial to improving the imaging quality of the edge field of view and increasing the imaging height of the camera lens group at the image side.

[0046] In an exemplary embodiment, the above camera lens group may further include at least one aperture. The aperture can be set at an appropriate position as needed. For example, it can be set between the first lens and the second lens. Optionally, the above camera lens group may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0047] In an exemplary embodiment, the maximum distortion of the camera lens group is within 8%. Based on the design of a wide-angle lens, this application achieves the effect of greatly reducing distortion, that is, having small distortion, by appropriately sacrificing the overall image quality of the edge.

[0048] In an exemplary embodiment, the camera lens group of this application can meet the condition FOV > 114°, where FOV is the maximum field of view angle of the camera lens group. More specifically, the maximum field of view angle FOV of the camera lens group can satisfy: 114.1° < FOV < 115.5°. Further, the maximum distortion of the camera lens group is within 8%. The camera lens group of this application has a large imaging angle of view and there is no obvious distortion phenomenon during shooting.

[0049] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 1.00 < f2 / f < 3.00, where f2 is the effective focal length of the second lens and f is the total effective focal length of the camera lens group. For the five-element wide-angle lens with the diaphragm in the middle provided by the present application, the second lens bears a relatively large optical power and has high sensitivity. Controlling the ratio of the effective focal length of the second lens to the total effective focal length within this range is beneficial to avoiding excessive concentration of optical power on the second lens while ensuring the aberration correction ability of the camera lens group, thereby facilitating reducing the sensitivity of the second lens and improving the production yield when manufacturing the camera lens group. More specifically, f2 and f can satisfy: 1.01 < f2 / f < 2.51.

[0050] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 2.00 < f12 / BFL < 6.00, where f12 is the combined focal length of the first lens and the second lens, and BFL is the distance from the image side of the fifth lens to the imaging surface of the camera lens group on the optical axis. When the camera lens group satisfies 2.00 < f12 / BFL < 6.00, it can avoid excessive concentration of its optical power on the first lens and the second lens, and can reduce the sensitivity of the first two lenses; at the same time, this camera lens group can also avoid problems such as too short back focal length being unfavorable for later module debugging. More specifically, f12 and BFL can satisfy: 2.04 < f12 / BFL < 5.50.

[0051] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 2.00 < (R9 + R10) / (R9 - R10) < 3.50, where R9 is the curvature radius of the object side of the fifth lens and R10 is the curvature radius of the image side of the fifth lens. When the camera lens group satisfies 2.00 < (R9 + R10) / (R9 - R10) < 3.50, it can improve the image quality of the central field of view while avoiding processing problems caused by excessive bending of the two mirror surfaces of the fifth lens and avoiding problems such as local image blurring. More specifically, R9 and R10 can satisfy: 2.30 < (R9 + R10) / (R9 - R10) < 3.15.

[0052] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 1.00 < R4 / R8 < 3.50, where R4 is the curvature radius of the image side of the second lens and R4 is the curvature radius of the image side of the fourth lens. When the camera lens group satisfies 1.00 < R4 / R8 < 3.50, it can be beneficial to improving its maximum field of view angle while maintaining better imaging quality; it is also beneficial to improving the internal reflection ghost image of the fourth lens. More specifically, R4 and R8 can satisfy: 1.30 < R4 / R8 < 3.20. Further, the maximum distortion of the camera lens group is within 8%.

[0053] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 1.00 < R6 / f < 3.00, where R6 is the radius of curvature of the image side of the third lens, and f is the total effective focal length of the camera lens group. The camera lens group satisfying 1.00 < R6 / f < 3.00 can avoid the concentration of optical power on the third lens. Especially when a high refractive index material is used for the third lens and its overall sensitivity is relatively high, this setting can help avoid problems such as increased sensitivity caused by excessive curvature of the image side of the third lens. More specifically, R6 and f can satisfy: 1.50 < R6 / f < 2.78.

[0054] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 3.00 < (CT4 + CT5) / (CT4 - CT5) < 8.00, where CT4 is the central thickness of the fourth lens on the optical axis, and CT5 is the central thickness of the fifth lens on the optical axis. The camera lens group satisfying 3.00 < (CT4 + CT5) / (CT4 - CT5) < 8.00 is beneficial to improving its optical distortion, and can play a role in improving the internal reflection ghost image of the fourth lens. At the same time, it can also avoid the overall size of the camera lens group from being too long, and thus is beneficial to keeping the imaging group small in size. More specifically, CT4 and CT5 can satisfy: 3.44 < (CT4 + CT5) / (CT4 - CT5) < 7.15.

[0055] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 12.00 < T12 / T45 < 17.00, where T12 is the distance between the first lens and the second lens on the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis. The camera lens group satisfying 12.00 < T12 / T45 < 17.00 is beneficial to increasing its maximum field of view angle, and at the same time is beneficial to reducing the ghost image risk between the fourth lens and the fifth lens. More specifically, T12 and T45 can satisfy: 12.15 < T12 / T45 < 16.70. Exemplarily, the maximum distortion of the camera lens group is within 8%.

[0056] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 4.00 < (SAG11 + SAG12) / (SAG11 - SAG12) < 6.00, where SAG11 is the axial distance between the intersection of the object side of the first lens and the optical axis and the vertex of the effective radius of the object side of the first lens, and SAG12 is the axial distance between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens. The camera lens group satisfying 4.00 < (SAG11 + SAG12) / (SAG11 - SAG12) < 6.00 is beneficial to improving its maximum field of view angle while avoiding the first lens from being too sensitive, thereby being beneficial to improving the production yield of the camera lens group. More specifically, SAG11 and SAG12 can satisfy: 4.30 < (SAG11 + SAG12) / (SAG11 - SAG12) < 5.25.

[0057] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 4.00 < (ET1 + ET2) / (ET2 - ET1) < 6.00, where ET1 is the edge thickness of the first lens and ET2 is the edge thickness of the second lens. The camera lens group satisfying 4.00 < (ET1 + ET2) / (ET2 - ET1) < 6.00 is beneficial to improving the image quality while avoiding problems such as difficult processing caused by the edge of the first lens being too thin or the edge of the second lens being too thin, and at the same time can avoid the problem of the overall size of the camera lens group being too long due to their respective excessive thicknesses. More specifically, ET1 and ET2 can satisfy: 4.40 < (ET1 + ET2) / (ET2 - ET1) < 5.35.

[0058] In an exemplary embodiment, the camera lens group of the present application can satisfy the conditional formula 6.00 < (DT51 + DT52) / (DT52 - DT51) < 9.00, where DT51 is the maximum effective radius of the object side of the fifth lens and DT52 is the maximum effective radius of the image side of the fifth lens. The camera lens group satisfying 6.00 < (DT51 + DT52) / (DT52 - DT51) < 9.00 can be beneficial to increasing its imaging height, reducing the off-axis aberration of the edge field of view, and avoiding too large a step difference between the fourth lens and the fifth lens, thereby being beneficial to the assembly of the camera lens group. More specifically, DT51 and DT52 can satisfy: 6.70 < (DT51 + DT52) / (DT52 - DT51) < 8.25.

[0059] The camera lens group according to the above-described embodiment of the present application may employ multiple lenses, such as the five lenses described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the on-axis spacing between each lens, etc., the volume of the camera lens group can be effectively reduced, the sensitivity of the camera lens group can be lowered, and the processability of the camera lens group can be improved, making the camera lens group more conducive to production and processing and applicable to portable electronic products. The imaging quality of the camera lens group according to the present application is acceptable. At the same time, it also has excellent optical properties such as a large viewing angle and small distortion.

[0060] In the embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical lens surface, that is, at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspherical lens surface. The characteristic of an aspherical lens is that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspherical lens surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are aspherical lens surfaces.

[0061] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the camera lens group can be changed to obtain the various results and advantages described in this specification. For example, although the five lenses are described as an example in the embodiment, the camera lens group is not limited to including five lenses. If necessary, the camera lens group may also include other numbers of lenses.

[0062] The following further describes specific embodiments of the camera lens group applicable to the above-described embodiment with reference to the drawings.

[0063] Example 1

[0064] The following refers to Figures 1 to 2D Describe the camera lens group according to Embodiment 1 of the present application. Figure 1 FIG. shows a schematic structural diagram of the camera lens group according to Embodiment 1 of the present application.

[0065] As Figure 1 shown, the camera lens group sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0066] The first lens E1 has a negative optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is concave, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The imaging lens group has an imaging surface S13, and light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0067] Table 1 shows the basic parameter table of the imaging lens group of Example 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0068]

[0069] Table 1

[0070] In Example 1, the value of the total effective focal length f of the imaging lens group is 1.64 mm, the value of the f-number Fno of the imaging lens group is 2.45, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S13 is 4.12 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.40 mm, and the value of the maximum field of view FOV is 114.2° (i.e., the value of half of the maximum field of view, Semi-FOV, is 57.1°).

[0071] In Example 1, the object side and the image side of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0072]

[0073] where x is the sagitta, the distance from the vertex of the aspherical surface along the optical axis at a position with a height of h; 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 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 and A 20 .

[0074] Face number A4 A6 A8 A10 A12 A14 S1 3.1143E-01 1.1500E+00 -1.4988E+01 1.0171E+02 -4.4923E+02 1.3521E+03 S2 6.8468E-01 3.7422E+00 -4.5847E+01 3.3316E+01 5.3720E+03 -7.1223E+04 S3 -8.4687E-01 9.7534E+01 -8.3254E+03 4.2131E+05 -1.3747E+07 3.0132E+08 S4 1.0554E+00 -5.7678E+01 1.5475E+03 -2.6245E+04 2.9415E+05 -2.2505E+06 S5 5.8273E-02 -8.5055E+00 1.4182E+02 -1.2337E+03 3.9798E+03 2.3548E+04 S6 -3.6525E-03 -2.9674E+00 3.6958E+01 -2.8448E+02 1.4300E+03 -4.8489E+03 S7 4.7886E-01 -2.3929E+00 -3.2892E+00 1.2888E+02 -9.3047E+02 3.7562E+03 S8 5.4016E-01 -3.7940E+00 7.6158E+00 2.8963E+01 -2.5674E+02 9.0330E+02 S9 9.8695E-02 -3.8140E+00 1.6196E+01 -4.4299E+01 8.5321E+01 -1.1690E+02 S10 -1.0551E+00 1.3957E+00 -1.9629E+00 2.4206E+00 -2.3341E+00 1.6550E+00 Face number A16 A18 A20 A22 A24 A26 S1 -2.8141E+03 4.0443E+03 -3.9351E+03 2.4720E+03 -9.0358E+02 1.4576E+02 S2 4.8970E+05 -2.0868E+06 5.6925E+06 -9.6825E+06 9.3454E+06 -3.9021E+06 S3 -4.5257E+09 4.6675E+10 -3.2483E+11 1.4571E+12 -3.8024E+12 4.3838E+12 S4 1.1928E+07 -4.3732E+07 1.0861E+08 -1.7391E+08 1.6139E+08 -6.5625E+07 S5 -3.2226E+05 1.6638E+06 -4.9086E+06 8.6565E+06 -8.5214E+06 3.6137E+06 S6 1.1328E+04 -1.8276E+04 1.9928E+04 -1.3900E+04 5.5204E+03 -9.2741E+02 S7 -9.7404E+03 1.6943E+04 -1.9782E+04 1.4917E+04 -6.5703E+03 1.2830E+03 S8 -1.9233E+03 2.6678E+03 -2.4205E+03 1.3843E+03 -4.5285E+02 6.4622E+01 S9 1.1339E+02 -7.6825E+01 3.5415E+01 -1.0560E+01 1.8339E+00 -1.4071E-01 S10 -8.4295E-01 3.0391E-01 -7.5706E-02 1.2403E-02 -1.2026E-03 5.2276E-05

[0075] Table 2

[0076] Figure 2A shows the axial chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of the converging focal points of light rays with different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the camera lens group of Embodiment 1, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 2C shows the distortion curve of the camera lens group of Embodiment 1, which represents the distortion magnitude values corresponding to different field angles. Figure 2D shows the longitudinal chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 2A to 2D it can be seen that the camera lens group given in Embodiment 1 can achieve good imaging quality.

[0077] Example 2

[0078] The following refers to Figures 3 to 4D Describe the camera lens group according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 shows a schematic structural diagram of the camera lens group according to Embodiment 2 of the present application.

[0079] As Figure 3 shown, the camera lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0080] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is concave, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The camera lens group has an imaging plane S13, and the light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging plane S13.

[0081] In Embodiment 2, the value of the total effective focal length f of the camera lens group is 1.65 mm, the value of the f-number Fno of the camera lens group is 2.42, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S13 is 4.13 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.40 mm, and the value of the maximum field of view FOV is 114.5°.

[0082] Table 3 shows the basic parameter table of the camera lens group of Embodiment 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 4 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 2, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0083]

[0084] Table 3

[0085]

[0086]

[0087] Table 4

[0088] Figure 4A Shows the axial chromatic aberration curve of the camera lens group of Embodiment 2, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 4B Shows the astigmatism curve of the camera lens group of Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C Shows the distortion curve of the camera lens group of Embodiment 2, which represents the distortion magnitude values corresponding to different field of view angles. Figure 4D Shows the lateral chromatic aberration curve of the camera lens group of Embodiment 2, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 4A to 4D It can be seen that the camera lens group given in Embodiment 2 can achieve good imaging quality.

[0089] Example 3

[0090] The following refers to Figures 5 to 6D Describes the camera lens group according to Embodiment 3 of the present application. Figure 5 Shows a schematic structural diagram of the camera lens group according to Embodiment 3 of the present application.

[0091] As Figure 5 Shown, the camera lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0092] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is concave, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is convex, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The imaging lens group has an imaging surface S13, and light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0093] In Embodiment 3, the value of the total effective focal length f of the imaging lens group is 1.63 mm, the value of the f-number Fno of the imaging lens group is 2.50, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S13 is 4.18 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.40 mm, and the value of the maximum field of view FOV is 114.9°.

[0094] Table 5 shows the basic parameter table of the imaging lens group of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 6 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0095]

[0096]

[0097] Table 5

[0098] Face number A4 A6 A8 A10 A12 A14 S1 3.6683E-01 8.5438E-01 -1.1549E+01 7.0477E+01 -2.7377E+02 7.2134E+02 S2 7.7091E-01 9.1592E-01 -1.5246E+01 6.0413E+01 5.2666E+02 -8.4315E+03 S3 -9.4582E-01 1.0832E+02 -9.1019E+03 4.5402E+05 -1.4630E+07 3.1740E+08 S4 6.6942E-01 -3.7896E+01 9.4778E+02 -1.5294E+04 1.6367E+05 -1.1947E+06 S5 -1.3311E-02 -3.5804E+00 2.2913E+01 3.1458E+02 -8.0717E+03 8.0680E+04 S6 -1.8277E-02 -2.1614E+00 1.9527E+01 -1.0368E+02 3.3585E+02 -5.5205E+02 S7 4.8036E-01 -2.7055E+00 1.0650E+00 7.9244E+01 -5.6837E+02 2.1299E+03 S8 5.8155E-01 -4.0503E+00 1.0427E+01 -6.7119E-01 -7.5180E+01 2.5192E+02 S9 9.2373E-02 -3.6724E+00 1.3050E+01 -2.7294E+01 3.8174E+01 -3.7221E+01 S10 -9.5127E-01 7.7864E-01 -1.5340E-01 -6.9610E-01 1.1065E+00 -8.9721E-01 Face number A16 A18 A20 A22 A24 A26 S1 -1.3149E+03 1.6591E+03 -1.4222E+03 7.9020E+02 -2.5655E+02 3.6911E+01 S2 5.5604E+04 -2.2048E+05 5.5703E+05 -8.7721E+05 7.8267E+05 -3.0093E+05 S3 -4.7283E+09 4.8455E+10 -3.3560E+11 1.5001E+12 -3.9051E+12 4.4959E+12 S4 6.0243E+06 -2.0936E+07 4.9077E+07 -7.3782E+07 6.3837E+07 -2.3956E+07 S5 -4.7421E+05 1.7837E+06 -4.3557E+06 6.6993E+06 -5.9081E+06 2.2806E+06 S6 -1.5155E+02 2.8124E+03 -6.2616E+03 7.0424E+03 -4.1803E+03 1.0433E+03 S7 -5.0258E+03 7.8478E+03 -8.1270E+03 5.3807E+03 -2.0649E+03 3.4963E+02 S8 -4.6251E+02 5.5039E+02 -4.3444E+02 2.1945E+02 -6.4131E+01 8.2360E+00 S9 2.5701E+01 -1.2530E+01 4.2159E+00 -9.3000E-01 1.2075E-01 -6.9740E-03 S10 4.6011E-01 -1.5646E-01 3.5180E-02 -5.0197E-03 4.1055E-04 -1.4602E-05

[0099] Table 6

[0100] Figure 6A Shows the axial chromatic aberration curve of the imaging lens group of Embodiment 3, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 6B Shows the astigmatism curve of the imaging lens group of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C Shows the distortion curve of the imaging lens group of Embodiment 3, which represents the distortion magnitude values corresponding to different field of view angles. Figure 6D Shows the lateral chromatic aberration curve of the imaging lens group of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 6A to 6D It can be seen that the imaging lens group given in Embodiment 3 can achieve good imaging quality.

[0101] Example 4

[0102] The following refers to Figures 7 to 8D a camera lens group according to Embodiment 4 of the present application is described. Figure 7 A schematic structural diagram of the camera lens group according to Embodiment 4 of the present application is shown.

[0103] As Figure 7 shown, the camera lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0104] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The camera lens group has an imaging surface S13, and light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0105] In Embodiment 4, the value of the total effective focal length f of the camera lens group is 1.57 mm, the value of the f-number Fno of the camera lens group is 2.55, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S13 is 4.12 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.38 mm, and the value of the maximum field of view FOV is 115.9°.

[0106] Table 7 shows the basic parameter table of the camera lens group of Embodiment 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 8 shows the high-order term coefficients of the aspherical mirrors that can be used in Embodiment 4, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0107]

[0108] Table 7

[0109]

[0110]

[0111] Table 8

[0112] Figure 8AThe axial chromatic aberration curve of the camera lens group of Embodiment 4 is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 8B The astigmatism curve of the camera lens group of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the camera lens group of Embodiment 4 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 8D The longitudinal chromatic aberration curve of the camera lens group of Embodiment 4 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 8A to 8D it can be seen that the camera lens group given in Embodiment 4 can achieve good imaging quality.

[0113] Example 5

[0114] The following refers to Figures 9 to 10D the camera lens group according to Embodiment 5 of the present application is described. Figure 9 The structural schematic diagram of the camera lens group according to Embodiment 5 of the present application is shown.

[0115] As Figure 9 shown, the camera lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0116] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is concave, and its image side S4 is convex. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The camera lens group has an imaging plane S13, and light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging plane S13.

[0117] In Embodiment 5, the value of the total effective focal length f of the camera lens group is 1.64 mm, the value of the f-number Fno of the camera lens group is 2.55, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging plane S13 is 4.20 mm, the value of half of the diagonal length of the effective pixel region on the imaging plane S13, ImgH, is 2.38 mm, and the value of the maximum field angle FOV is 114.2°.

[0118] Table 9 shows the basic parameter table of the camera lens group of Example 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the high-order term coefficients of each aspherical mirror surface that can be used in Example 5, where each aspherical surface type can be defined by formula (1) given in the above Example 1.

[0119]

[0120]

[0121] Table 9

[0122] Face number A4 A6 A8 A10 A12 A14 S1 3.1980E-01 3.6300E-01 -5.2938E+00 2.7096E+01 -8.6850E+01 1.8977E+02 S2 5.9919E-01 -3.1282E-01 -8.9880E+00 1.0924E+02 -7.2605E+02 3.1678E+03 S3 -2.5266E-01 -3.3700E+00 -4.5331E-01 1.2517E+04 -8.1867E+05 2.6902E+07 S4 -8.4752E-01 5.3311E-01 -1.5671E+01 4.4778E+02 -8.1794E+03 9.3705E+04 S5 -2.5180E-01 2.9199E+00 -8.7314E+01 9.2867E+02 -6.1372E+03 2.8375E+04 S6 -1.4702E-01 4.8174E+00 -5.9294E+01 3.5905E+02 -1.3944E+03 3.8147E+03 S7 1.1757E-01 2.2257E+00 -1.7325E+01 6.6655E+01 -1.9112E+02 4.7901E+02 S8 4.6059E-01 -3.4014E+00 1.1270E+01 -2.2124E+01 3.1930E+01 -5.8697E+01 S9 1.6834E-01 -3.4872E+00 1.3162E+01 -3.1130E+01 4.9262E+01 -5.3175E+01 S10 -1.1407E+00 1.4985E+00 -1.8095E+00 1.6001E+00 -9.6439E-01 3.7314E-01 Face number A16 A18 A20 A22 A24 A26 S1 -2.8895E+02 3.0641E+02 -2.2171E+02 1.0428E+02 -2.8713E+01 3.5063E+00 S2 -9.3920E+03 1.8964E+04 -2.5576E+04 2.1958E+04 -1.0818E+04 2.3234E+03 S3 -5.3940E+08 6.9860E+09 -5.8850E+10 3.1195E+11 -9.4605E+11 1.2526E+12 S4 -6.8337E+05 3.2329E+06 -9.9204E+06 1.9094E+07 -2.0977E+07 1.0046E+07 S5 -9.3473E+04 2.1632E+05 -3.4090E+05 3.4616E+05 -2.0314E+05 5.2145E+04 S6 -7.5723E+03 1.0861E+04 -1.0946E+04 7.3302E+03 -2.9199E+03 5.2254E+02 S7 -9.9560E+02 1.5272E+03 -1.5950E+03 1.0608E+03 -4.0386E+02 6.6913E+01 S8 1.3203E+02 -2.1348E+02 2.1241E+02 -1.2521E+02 4.0326E+01 -5.4814E+00 S9 3.9685E+01 -2.0525E+01 7.2432E+00 -1.6692E+00 2.2702E-01 -1.3851E-02 S10 -7.7460E-02 -1.3153E-03 5.7886E-03 -1.6484E-03 2.1481E-04 -1.1326E-05

[0123] Table 10

[0124] Figure 10A shows the axial chromatic aberration curve of the camera lens group of Example 5, which represents the deviation of the converging focal points of light rays with different wavelengths after passing through the lens. Figure 10B shows the astigmatism curve of the camera lens group of Example 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C shows the distortion curve of the camera lens group of Example 5, which represents the distortion magnitude values corresponding to different field angles. Figure 10D shows the lateral chromatic aberration curve of the camera lens group of Example 5, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 10A to 10D it can be seen that the camera lens group given in Example 5 can achieve good imaging quality.

[0125] Example 6

[0126] The following refers to Figures 11 to 12D to describe the camera lens group according to Embodiment 6 of the present application. Figure 11 shows a schematic structural diagram of the camera lens group according to Embodiment 6 of the present application.

[0127] As Figure 11 shown, the camera lens group sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.

[0128] The first lens E1 has a negative focal power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive focal power, its object side S3 is concave, and its image side S4 is convex. The third lens E3 has a negative focal power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive focal power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative focal power, its object side S9 is convex, and its image side S10 is concave. The filter E6 has an object side S11 and an image side S12. The imaging lens group has an imaging surface S13, and the light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0129] In Embodiment 6, the value of the total effective focal length f of the imaging lens group is 1.62 mm, the value of the f-number Fno of the imaging lens group is 2.55, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S13 is 4.21 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S13, ImgH, is 2.38 mm, and the value of the maximum field of view FOV is 115.4°.

[0130] Table 11 shows the basic parameter table of the imaging lens group of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 6, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0131]

[0132] Table 11

[0133] Face number A4 A6 A8 A10 A12 A14 S1 3.1959E-01 2.5277E-01 -4.0965E+00 2.0111E+01 -6.1549E+01 1.2874E+02 S2 5.5108E-01 3.2978E-01 -1.4030E+01 1.3011E+02 -7.5003E+02 2.9637E+03 S3 -2.3024E-01 -1.0285E+01 6.9292E+02 -2.7061E+04 5.9679E+05 -6.4570E+06 S4 -5.6657E-01 -8.5671E+00 1.4090E+02 -1.5287E+03 1.1191E+04 -4.8409E+04 S5 4.5070E-02 -7.3074E+00 6.0947E+01 -5.6011E+02 4.6788E+03 -2.7487E+04 S6 7.7938E-02 1.1501E+00 -3.1775E+01 2.1675E+02 -8.2388E+02 2.0621E+03 S7 2.1255E-01 1.2493E+00 -1.1449E+01 3.8545E+01 -8.7692E+01 2.1184E+02 S8 4.9274E-01 -3.9456E+00 1.5169E+01 -4.1017E+01 9.9202E+01 -2.3076E+02 S9 1.9252E-01 -3.7168E+00 1.4226E+01 -3.3641E+01 5.2777E+01 -5.6334E+01 S10 -1.1669E+00 1.5856E+00 -1.9310E+00 1.6749E+00 -9.5748E-01 3.2531E-01 Face number A16 A18 A20 A22 A24 A26 S1 -1.8814E+02 1.9185E+02 -1.3369E+02 6.0632E+01 -1.6112E+01 1.9003E+00 S2 -8.1552E+03 1.5517E+04 -1.9911E+04 1.6363E+04 -7.7460E+03 1.6025E+03 S3 -7.8464E+06 1.2257E+09 -1.7026E+10 1.1726E+11 -4.2101E+11 6.2894E+11 S4 7.1103E+04 4.0737E+05 -2.6814E+06 7.0563E+06 -9.2943E+06 5.0321E+06 S5 1.0953E+05 -2.9748E+05 5.4496E+05 -6.4582E+05 4.4743E+05 -1.3755E+05 S6 -3.6143E+03 4.5180E+03 -3.9803E+03 2.3581E+03 -8.4359E+02 1.3753E+02 S7 -5.2906E+02 9.8297E+02 -1.1776E+03 8.5864E+02 -3.4752E+02 5.9945E+01 S8 4.3888E+02 -5.8619E+02 5.1242E+02 -2.7771E+02 8.4562E+01 -1.1055E+01 S9 4.1572E+01 -2.1281E+01 7.4441E+00 -1.7032E+00 2.3041E-01 -1.4008E-02 S10 -3.7949E-02 -1.9212E-02 1.0830E-02 -2.5295E-03 3.0262E-04 -1.5148E-05

[0134] Table 12

[0135] Figure 12A Shows the axial chromatic aberration curve of the imaging lens group of Embodiment 6, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the imaging lens group of Embodiment 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C Shows the distortion curve of the imaging lens group of Embodiment 6, which represents the distortion magnitude values corresponding to different field of view angles. Figure 12D Shows the lateral chromatic aberration curve of the imaging lens group of Embodiment 6, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 12A to 12D It can be seen that the imaging lens group given in Embodiment 6 can achieve good imaging quality.

[0136] In summary, Embodiments 1 to 6 respectively satisfy the relationships shown in Table 13.

[0137] Conditional / Example 1 2 3 4 5 6 f2 / f 1.02 1.04 1.10 2.02 2.49 2.29 f12 / BFL 2.05 2.06 2.19 4.92 5.49 4.87 (R9 + R10) / (R9 - R10) 2.88 2.89 3.10 2.36 2.31 2.32 R4 / R8 1.31 1.32 1.27 3.10 3.16 2.94 R6 / f 2.74 2.48 2.60 2.29 1.63 1.53 (CT4 + CT5) / (CT4 - CT5) 6.99 7.10 6.85 3.95 3.46 3.47 T12 / T45 12.18 12.69 14.15 15.10 15.22 16.68 (SAG11 + SAG12) / (SAG11 - SAG12) 4.32 5.08 5.22 4.69 4.37 4.56 (ET1 + ET2) / (ET2 - ET1) 5.10 5.30 4.69 4.41 4.65 5.26 (DT51 + DT52) / (DT52 - DT51) 6.73 7.56 7.71 6.85 8.22 8.17 Maximum distortion -6.70％ -7.15％ -7.14％ -6.50％ -6.00％ -6.80％

[0138] Table 13

[0139] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described camera lens group.

[0140] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, a technical solution formed by mutually replacing the above features with technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. Camera lens group, characterized in that, It sequentially includes, from the object side to the image side along the optical axis: A first lens with negative optical power, whose image side is concave; An aperture stop; A second lens with positive optical power, whose image side is convex; A third lens with positive or negative optical power, whose image side is concave; A fourth lens with positive optical power, whose image side is convex; and A fifth lens with negative optical power, whose object side is convex and image side is concave; Wherein, the edge thickness ET1 of the first lens and the edge thickness ET2 of the second lens satisfy: 4.40 < (ET1 + ET2) / (ET2 - ET1) < 5.35; The maximum field of view FOV of the camera lens group satisfies: 114.1° < FOV < 115.5°; The maximum distortion of the camera lens group is within 8%; The number of lenses with optical power in the camera lens group is five.

2. The camera lens group according to claim 1, wherein The effective focal length f2 of the second lens and the total effective focal length f of the camera lens group satisfy: 1.00 < f2 / f < 2.

51.

3. The camera lens group according to claim 1, characterized in that, The combined focal length f12 of the first lens and the second lens and the distance BFL from the image side of the fifth lens to the imaging plane of the camera lens group on the optical axis satisfy: 2.00 < f12 / BFL < 5.

50.

4. The camera lens group according to claim 1, wherein, The radius of curvature R9 of the object side of the fifth lens and the radius of curvature R10 of the image side of the fifth lens satisfy: 2.30 < (R9 + R10) / (R9 - R10) < 3.

15.

5. The camera lens group according to claim 1, wherein, The radius of curvature R4 of the image side of the second lens and the radius of curvature R8 of the image side of the fourth lens satisfy: 1.30 < R4 / R8 < 3.

20.

6. The camera lens group according to claim 1, wherein, The radius of curvature R6 of the image side of the third lens and the total effective focal length f of the camera lens group satisfy: 1.50 < R6 / f < 2.

78.

7. The camera lens group according to claim 1, wherein The central thickness CT4 of the fourth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy: 3.44 < (CT4 + CT5) / (CT4 - CT5) < 7.

15.

8. The camera lens group according to claim 1, wherein The interval distance T12 between the first lens and the second lens on the optical axis and the air interval T45 between the fourth lens and the fifth lens on the optical axis satisfy: 12.15 < T12 / T45 < 16.

70.

9. The camera lens group according to any one of claims 1 to 8, characterized in that, The axial distance SAG11 between the intersection point of the object side of the first lens and the optical axis and the effective radius vertex of the object side of the first lens and the axial distance SAG12 between the intersection point of the image side of the first lens and the optical axis and the effective radius vertex of the image side of the first lens satisfy: 4.30 < (SAG11 + SAG12) / (SAG11 - SAG12) < 5.

25.

10. The camera lens group according to any one of claims 1 to 8, characterized in that, The maximum effective radius DT51 of the object side of the fifth lens and the maximum effective radius DT52 of the image side of the fifth lens satisfy: 6.70 < (DT51 + DT52) / (DT52 - DT51) < 8.25.

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