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 diaphragm; a first lens with positive optical power, the object side surface of which is convex; a second lens with optical power; a third lens with optical power, the object side surface of which is convex and the image side surface of which is concave; a fourth lens with positive optical power, the object side surface of which is concave and the image side surface of which is convex; and a fifth lens with negative optical power, the object side surface of which is convex and the image side surface of which is concave. And the camera lens group satisfies the following conditional expressions: 2.00 mm < tan²(Semi-FOV) × f < 5.00 mm; and 1.00 < (SAG42 + SAG51) / (SAG42 - SAG51) < 3.50.

Description

Technical Field

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

[0002] With the continuous improvement of the technical capabilities of portable electronic devices such as smart phones, the trend of using smart phones and other portable electronic devices for photography instead of traditional cameras is becoming increasingly obvious. Currently, most of the mainstream models of smart phones and other portable electronic devices on the market are mainly full-screen, and the screen-to-body ratio of smart phones and other portable electronic devices is getting higher and higher, which will make the front cameras of traditional mobile phones and other electronic devices no longer applicable.

[0003] Under this trend, small-headed lenses have won the favor of developers of smart phones and other portable electronic devices with their extremely small lens head sizes. However, traditional central wide-angle lenses cannot achieve the characteristics of extremely small heads. How to make the camera lens group also have the characteristics of an ultra-small head while achieving a wide angle, so as to be more suitable for full-screen smart phones and other portable electronic devices is one of the problems that many lens designers urgently need to solve at present. Summary of the Invention

[0004] The present application provides such a camera lens group, which sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side is convex; a second lens with optical power; a third lens with optical power, whose object side is convex and image side is concave; a fourth lens with positive optical power, whose object side is concave and image side is convex; and a fifth lens with negative optical power, whose object side is convex and image side is concave. Half of the maximum field of view of the camera lens group, Semi-FOV, and the total effective focal length f of the camera lens group can satisfy: 2.00 mm < tan 2 (Semi-FOV) × f < 5.00 mm; the distance SAG42 from the intersection of the image side of the fourth lens and the optical axis to the vertex of the effective radius of the image side of the fourth lens on the optical axis and the distance SAG51 from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens on the optical axis can satisfy: 1.00 < (SAG42 + SAG51) / (SAG42 - SAG51) < 3.50.

[0005] In one embodiment, at least one of the object side of the first lens to the image side of the fifth lens is an aspherical mirror surface.

[0006] In one embodiment, the maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT52 of the image side of the fifth lens can satisfy: 3.00 < DT52 / DT11 < 5.00.

[0007] In one embodiment, the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens group satisfy: TTL / ImgH < 1.55.

[0008] In one embodiment, the combined focal length f45 of the fourth lens and the fifth lens and the distance BFL from the image side surface of the fifth lens to the imaging surface of the camera lens group on the optical axis satisfy: 2.00 < f45 / BFL < 16.00.

[0009] In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R1 of the object side surface of the first lens satisfy: 1.00 < f1 / R1 < 6.00.

[0010] In one embodiment, the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 2.00 < R5 / R10 < 6.00.

[0011] In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the spacing distance T34 between the third lens and the fourth lens on the optical axis satisfy: 1.00 < CT4 / T34 < 4.00.

[0012] In one embodiment, the edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens satisfy: 1.00 < (ET4 + ET5) / (ET5 - ET4) < 4.00.

[0013] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 0.50 < CT5 / CT3 < 2.50.

[0014] In one embodiment, the total effective focal length f of the camera lens group and the effective focal length f4 of the fourth lens satisfy: 1.00 < f / f4 < 3.00.

[0015] On the other hand, the present application provides a camera lens group. The camera lens group sequentially includes, from the object side to the image side along the optical axis: a diaphragm; a first lens with positive optical power, whose object side surface is convex; a second lens with optical power; a third lens with optical power, whose object side surface is convex and image side surface is concave; a fourth lens with positive optical power, whose object side surface is concave and image side surface is convex; and a fifth lens with negative optical power, whose object side surface is convex and image side surface is concave. Half of the maximum field of view Semi-FOV of the camera lens group and the total effective focal length f of the camera lens group satisfy: 2.00 mm < tan 2(Semi-FOV)×f < 5.00 mm; The edge thickness ET4 of the fourth lens and the edge thickness ET5 of the fifth lens can satisfy: 1.00 < (ET4 + ET5) / (ET5 - ET4) < 4.00.

[0016] This application uses multiple (e.g., five) lenses. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the on-axis spacing between each lens, etc., the above camera lens group has at least one beneficial effect such as miniaturization, wide angle, ultra-small head, and high imaging quality. Brief Description of the Drawings

[0017] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of this application will become more obvious:

[0018] Figure 1 Shows a schematic structural diagram of a camera lens group according to Embodiment 1 of this application;

[0019] Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 1;

[0020] Figure 3 Shows a schematic structural diagram of a camera lens group according to Embodiment 2 of this application;

[0021] Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 2;

[0022] Figure 5 Shows a schematic structural diagram of a camera lens group according to Embodiment 3 of this application;

[0023] Figures 6A to 6D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 3;

[0024] Figure 7 Shows a schematic structural diagram of a camera lens group according to Embodiment 4 of this application;

[0025] Figures 8A to 8D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 4;

[0026] Figure 9 Shows a schematic structural diagram of a camera lens group according to Embodiment 5 of this application;

[0027] 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;

[0028] Figure 11 The structural schematic diagram of the camera lens group according to Embodiment 6 of the present application is shown;

[0029] 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;

[0030] Figure 13 The structural schematic diagram of the camera lens group according to Embodiment 7 of the present application is shown;

[0031] Figures 14A to 14D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 7 are respectively shown;

[0032] Figure 15 The structural schematic diagram of the camera lens group according to Embodiment 8 of the present application is shown;

[0033] Figures 16A to 16D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 8 are respectively shown;

[0034] Figure 17 The structural schematic diagram of the camera lens group according to Embodiment 9 of the present application is shown; and

[0035] Figures 18A to 18D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the camera lens group of Embodiment 9 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 the 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 drawings, for the sake of clarity, the thickness, dimensions, and shape of the lenses are slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0039] In this document, 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 being 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 "comprises", "comprising", "has", "including", and / or "including having", 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 individual elements 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". And 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 belongs. 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 and features in the embodiments of this application may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

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

[0044] According to an exemplary embodiment of the present application, a camera lens group may include five lenses having optical power, namely a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged in sequence along the optical axis from the object side to the image side. There may be a spacing distance between any two adjacent lenses among the first lens to the fifth lens.

[0045] In an exemplary embodiment, the first lens may have a positive optical power, and its object side may be convex; the second lens has a positive optical power or a negative optical power; the third lens has a positive optical power or a negative optical power, its object side may be convex, and its image side may be concave; the fourth lens may have a positive optical power, its object side may be concave, and its image side may be convex; and the fifth lens may have a negative optical power, its object side may be convex, and its image side may be concave.

[0046] The first lens with a positive optical power, in combination with the fourth lens with a positive optical power and the fifth lens with a negative optical power, can, while expanding the maximum field of view angle of the camera lens group, enable the camera lens group to also maintain good chromatic aberration correction ability, thereby having better imaging quality. Designing the object side of the first lens as convex can help reduce the sensitivity of the camera lens group and theoretically improve the mass production yield of the camera lens group as much as possible. Designing the object side of the third lens as convex and its image side as concave, and in combination with the convex-concave surface type of the fourth lens, helps to minimize the risk of ghosting caused by reflection between the third lens and the fourth lens and internal reflection within the fourth lens without reducing the imaging quality of the camera lens group. Designing the surface type of the fifth lens as convex-concave helps to improve the imaging quality in the middle imaging region, enabling the camera lens group to have better imaging quality.

[0047] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 2.00 mm < tan 2 (Semi-FOV) × f < 5.00 mm, where Semi-FOV is half of the maximum field of view angle of the camera lens group, and f is the total effective focal length of the camera lens group. More specifically, Semi-FOV and f may further satisfy: 2.70 mm < tan 2 (Semi-FOV) × f < 4.30 mm. Satisfying 2.00 mm < tan 2 (Semi-FOV) × f < 5.00 mm can, while increasing the field of view angle of the camera lens group, help control the imaging image height within a reasonable range, enabling the lens to have better imaging ability.

[0048] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 3.00 < DT52 / DT11 < 5.00, where DT11 is the maximum effective radius of the object side of the first lens, and DT52 is the maximum effective radius of the image side of the fifth lens. More specifically, DT52 and DT11 may further satisfy: 3.20 < DT52 / DT11 < 4.80. Satisfying 3.00 < DT52 / DT11 < 5.00 helps with the design of the lens barrel depth, making the lens more suitable for a front camera.

[0049] In an exemplary embodiment, the camera lens group according to the present application may satisfy: TTL / ImgH < 1.55, where TTL is the distance from the object side of the first lens to the imaging surface of the camera lens group on the optical axis, and ImgH is half of the diagonal length of the effective pixel region on the imaging surface of the camera lens group. Satisfying TTL / ImgH < 1.55 can avoid the problem of the overall excessive length of the camera lens group caused by the excessive thickness of the first lens while ensuring the basic imaging height, which is conducive to maintaining the ultra-small size characteristic of the camera lens group.

[0050] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 2.00 < f45 / BFL < 16.00, where f45 is the combined focal length of the fourth lens and the fifth 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. More specifically, f45 and BFL may further satisfy: 2.60 < f45 / BFL < 15.20. Satisfying 2.00 < f45 / BFL < 16.00 can avoid risks such as difficulties in later module debugging caused by the too short back focal length BFL of the camera lens group, and can reasonably distribute the optical power of the entire lens, avoiding excessive concentration on the first three lenses, which is conducive to improving the mass production performance of the camera lens group.

[0051] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f1 / R1 < 6.00, where f1 is the effective focal length of the first lens, and R1 is the radius of curvature of the object side of the first lens. More specifically, f1 and R1 may further satisfy: 1.30 < f1 / R1 < 5.80. Satisfying 1.00 < f1 / R1 < 6.00 can ensure that while increasing the field of view angle of the camera lens group, it can avoid the risk that the first lens is too sensitive and not conducive to processing due to too small f1 or too large R1.

[0052] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 2.00 < R5 / R10 < 6.00, where R5 is the radius of curvature of the object side of the third lens, and R10 is the radius of curvature of the image side of the fifth lens. More specifically, R5 and R10 may further satisfy: 2.20 < R5 / R10 < 6.00. Satisfying 2.00 < R5 / R10 < 6.00 can ensure the correction ability of the camera lens group for chromatic aberration and distortion. In particular, it is conducive to improving the imaging quality of the central region.

[0053] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < CT4 / T34 < 4.00, where CT4 is the central thickness of the fourth lens on the optical axis, and T34 is the distance between the third lens and the fourth lens on the optical axis. More specifically, CT4 and T34 may further satisfy: 1.30 < CT4 / T34 < 3.20. Satisfying 1.00 < CT4 / T34 < 4.00 is beneficial to improving the ghost image risk caused by internal reflection in the fourth lens and reflection between the fourth lens and the third lens, and is beneficial to improving the imaging quality of the camera lens group.

[0054] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < (SAG42 + SAG51) / (SAG42 - SAG51) < 3.50, where SAG42 is the distance from the intersection of the image side of the fourth lens and the optical axis to the vertex of the effective radius of the image side of the fourth lens on the optical axis, and SAG51 is the distance from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens on the optical axis. More specifically, SAG42 and SAG51 may further satisfy: 1.30 < (SAG42 + SAG51) / (SAG42 - SAG51) < 3.10. Satisfying 1.00 < (SAG42 + SAG51) / (SAG42 - SAG51) < 3.50 is beneficial to avoiding the mass production risk caused by excessive step difference between SAG42 and SAG51, and is also beneficial to improving the ghosting phenomenon caused by reflection between the object side of the fifth lens and the image side of the fourth lens.

[0055] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < (ET4 + ET5) / (ET5 - ET4) < 4.00, where ET4 is the edge thickness of the fourth lens, and ET5 is the edge thickness of the fifth lens. More specifically, ET4 and ET5 may further satisfy: 1.80 < (ET4 + ET5) / (ET5 - ET4) < 3.50. Satisfying 1.00 < (ET4 + ET5) / (ET5 - ET4) < 4.00 can avoid problems such as mass production difficulties caused by too thin edge thicknesses of the fourth lens and the fifth lens, and can also improve the imaging quality of the edge field of view and the relative illuminance of the edge field of view by adjusting the edge thicknesses of the fourth lens and the fifth lens.

[0056] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 0.50 < CT5 / CT3 < 2.50, where CT5 is the central thickness of the fifth lens on the optical axis, and CT3 is the central thickness of the third lens on the optical axis. More specifically, CT5 and CT3 may further satisfy: 0.90 < CT5 / CT3 < 2.20. Satisfying 0.50 < CT5 / CT3 < 2.50 can avoid problems such as difficult lens forming caused by too thin central thicknesses of the third lens and the fifth lens on the optical axis, and can also avoid the problem of excessive overall lens size caused by too thick central thicknesses of the third lens and the fifth lens on the optical axis.

[0057] In an exemplary embodiment, the camera lens group according to the present application may satisfy: 1.00 < f / f4 < 3.00, where f is the total effective focal length of the camera lens group, and f4 is the effective focal length of the fourth lens. More specifically, f and f4 may further satisfy: 1.30 < f / f4 < 2.40. Satisfying 1.00 < f / f4 < 3.00 is beneficial to controlling the percentage of the effective focal length of the fourth lens in the total effective focal length, which can make the optical power of the camera lens group more reasonably distributed, and is also beneficial to reducing the overall sensitivity of the camera lens group and improving the processing yield.

[0058] In an exemplary embodiment, the camera lens group according to the present application further includes a diaphragm disposed between the object side and the first 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.

[0059] The camera lens group according to the above 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 axial spacing between each lens, etc., the volume of the camera lens group can be effectively reduced and the processability of the camera lens group can be improved, making the camera lens group more conducive to production and applicable to portable electronic products. The camera lens group configured as above has characteristics such as an ultra-small head, an ultra-large field of view angle, and good imaging quality, and can well meet the usage requirements of various portable electronic products in the camera scenario.

[0060] In an 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 changes continuously 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 astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much as possible the aberration that appears during imaging, 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 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 embodiments with reference to the accompanying 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 The structural schematic diagram of the camera lens group according to Embodiment 1 of the present application is shown.

[0065] As Figure 1 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0066] The first lens E1 has a positive 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 concave, and its image side S4 is convex. The third lens E3 has a negative 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 light from the 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 camera lens group in Embodiment 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0068]

[0069] Table 1

[0070] In this example, the total effective focal length f of the camera lens group is 2.75 mm, the total length TTL of the camera lens group (i.e., the distance on the optical axis from the object side S1 of the first lens E1 to the imaging surface S13 of the camera lens group) is 4.31 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 of the camera lens group ImgH is 3.07 mm, half of the maximum field of view angle of the camera lens group Semi-FOV is 50.8°, and the aperture value Fno of the camera lens group is 2.25.

[0071] In Embodiment 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 shape 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 to 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 A16 A18 A20 S1 1.2116E-02 -6.4255E-01 5.7786E+00 -3.4530E+01 1.1270E+02 -1.8945E+02 1.2800E+02 0.0000E+00 0.0000E+00 S2 -1.5618E-01 -2.3276E-01 -1.7805E-02 3.1810E-01 -5.0225E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -1.1861E-01 1.1341E+00 -1.6243E+01 1.1012E+02 -4.0606E+02 5.5610E+02 1.6792E+03 -9.8591E+03 2.2140E+04 S4 -1.0229E-01 -5.3428E-01 6.1981E+00 -3.3985E+01 1.0318E+02 -1.4720E+02 -8.6863E+01 7.9140E+02 -1.5418E+03 S5 -6.4120E-02 -1.3045E-01 1.0982E+00 -3.7711E+00 7.3820E+00 -9.0079E+00 6.8472E+00 -2.9915E+00 5.7220E-01 S6 -3.0425E-02 -1.3183E-01 4.3269E-01 -7.2637E-01 6.8304E-01 -3.3925E-01 6.5987E-02 5.9160E-03 -2.7754E-03 S7 -1.6746E-01 1.6379E+00 -8.9337E+00 3.2811E+01 -8.4917E+01 1.5775E+02 -2.1063E+02 2.0140E+02 -1.3640E+02 S8 7.3032E-01 -3.1730E+00 1.0425E+01 -2.6322E+01 4.8337E+01 -6.3701E+01 6.0275E+01 -4.0849E+01 1.9609E+01 S9 1.9758E-01 -5.4287E-01 5.2132E-01 -4.8052E-02 -6.5167E-01 1.0974E+00 -1.0257E+00 6.3659E-01 -2.7453E-01 S10 1.3833E-02 -7.0650E-02 3.6308E-02 1.9569E-02 -4.2367E-02 3.2337E-02 -1.5156E-02 4.8471E-03 -1.0937E-03

[0075] Table 2

[0076] Figure 2A Fig. 3 shows the axial chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 2B Fig. 4 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 Fig. 5 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 Fig. 6 shows the longitudinal chromatic aberration curve of the camera lens group of Embodiment 1, which represents the deviation of different image heights of light rays on the imaging plane after passing 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 will refer to Figures 3 to 4D to 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 Fig. 7 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

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

[0081] In this example, the total effective focal length f of the camera lens group is 3.11 mm, the total length TTL of the camera lens group is 4.37 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 of the camera lens group is ImgH = 3.27 mm, half of the maximum field angle of the camera lens group is Semi - FOV = 46.1°, and the f - number Fno of the camera lens group is 2.24.

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

[0083]

[0084] Table 3

[0085] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.1695E-02 5.2247E-01 -6.4515E+00 4.1199E+01 -1.5695E+02 3.6030E+02 -4.8344E+02 3.4185E+02 -9.4647E+01 S2 5.5258E-03 -7.8543E-01 5.8928E+00 -3.5996E+01 1.3660E+02 -3.2507E+02 4.7102E+02 -3.7989E+02 1.3104E+02 S3 -1.5107E-01 4.8949E-02 -1.8439E+00 9.0226E+00 -2.9302E+01 5.9343E+01 -7.1639E+01 4.7712E+01 -1.3188E+01 S4 -1.7599E-01 2.9993E-01 1.0546E+00 -9.2579E+00 2.8363E+01 -4.8606E+01 4.9473E+01 -2.8017E+01 6.8138E+00 S5 -4.7627E-01 9.3770E-01 -5.9945E-01 -2.5891E+00 9.0540E+00 -1.4435E+01 1.3069E+01 -6.4565E+00 1.3455E+00 S6 -1.3589E-01 -6.2987E-02 4.9425E-01 -1.0160E+00 1.0833E+00 -6.4105E-01 1.8101E-01 -1.4069E-02 1.4288E-03 S7 3.0001E-02 -2.6374E-01 3.3757E-01 -1.0978E-01 -6.0562E-01 1.2836E+00 -1.1774E+00 5.2418E-01 -9.1189E-02 S8 -3.9265E-01 1.0746E+00 -2.5939E+00 4.0484E+00 -4.0400E+00 2.5615E+00 -9.8709E-01 2.0955E-01 -1.8758E-02 S9 -1.1952E-01 -1.2062E-01 1.2062E-01 1.0870E-01 -2.5076E-01 2.0397E-01 -9.6226E-02 2.8981E-02 -5.6653E-03 S10 -1.1157E-01 4.6594E-02 -1.1441E-02 5.4644E-03 -6.6694E-03 4.7905E-03 -2.0012E-03 5.2295E-04 -8.7114E-05

[0086] Table 4

[0087] Figure 4A shows the axial chromatic aberration curve of the camera lens group of Embodiment 2, which represents the deviation of the convergence points of light rays with 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 angles. Figure 4D shows the longitudinal 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 plane after passing through the lens. According to Figures 4A to 4D it can be known that the camera lens group given in Embodiment 2 can achieve good imaging quality.

[0088] Example 3

[0089] The following refers to Figures 5 to 6D to describe 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.

[0090] As Figure 5 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0091] The first lens E1 has a positive focal power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a positive focal power, with its object side S3 being concave and its image side S4 being convex. The third lens E3 has a negative focal power, with its object side S5 being convex and its image side S6 being concave. The fourth lens E4 has a positive focal power, with its object side S7 being concave and its image side S8 being convex. The fifth lens E5 has a negative focal power, with its object side S9 being convex and its image side S10 being concave. The filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0092] In this example, the total effective focal length f of the camera lens group is 2.67 mm, the total length TTL of the camera lens group is 3.96 mm, half of the diagonal length of the effective pixel region on the imaging surface S13 of the camera lens group is ImgH = 2.57 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 46.0°, and the f - number Fno of the camera lens group is 2.24.

[0093] Table 5 shows the basic parameter table of the camera lens group of Example 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 of the aspherical mirror surfaces that can be used in Example 3, and each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0094]

[0095] Table 5

[0096]

[0097]

[0098] Table 6

[0099] Figure 6A shows the axial chromatic aberration curve of the camera lens group of Example 3, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 6B shows the astigmatism curve of the camera lens group of Example 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C shows the distortion curve of the camera lens group of Example 3, which represents the distortion magnitude values corresponding to different field of view angles. Figure 6D shows the lateral chromatic aberration curve of the camera lens group of Example 3, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 6A to 6D it can be seen that the camera lens group given in Example 3 can achieve good imaging quality.

[0100] Example 4

[0101] Refer to the following Figures 7 to 8D which describes the camera lens group according to Embodiment 4 of the present application. Figure 7 The structural schematic diagram of the camera lens group according to Embodiment 4 of the present application is shown.

[0102] As Figure 7 shown, the camera lens group sequentially includes, from the object side to the image side: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0103] The first lens E1 has a positive optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has a negative optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is convex, and its image side surface S10 is concave. The filter E6 has an object side surface S11 and an image side surface S12. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0104] In this example, the total effective focal length f of the camera lens group is 2. mm, the total length TTL of the camera lens group is 3.81 mm, half of the diagonal length of the effective pixel region on the imaging surface S13 of the camera lens group is ImgH = 2.73 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 51.1°, and the aperture value Fno of the camera lens group is 2.24.

[0105] 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 higher-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 4, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0106]

[0107]

[0108] Table 7

[0109] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -6.3432E-03 -4.3213E-01 1.9655E+00 -1.8057E+01 9.0340E+01 -2.3713E+02 2.5152E+02 0.0000E+00 0.0000E+00 S2 -3.5096E-01 -7.7642E-01 7.1380E-01 -8.7087E-01 4.2697E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.9796E-01 3.8303E+00 -1.1178E+02 1.7257E+03 -1.7266E+04 1.1776E+05 -5.5587E+05 1.8152E+06 -4.0241E+06 S4 -1.2540E-01 -2.1258E+00 4.4840E+01 -5.4961E+02 4.3554E+03 -2.2982E+04 8.3001E+04 -2.0658E+05 3.4875E+05 S5 -1.7291E-01 4.6396E-01 -3.3787E+00 1.8338E+01 -5.7242E+01 1.0531E+02 -1.1629E+02 7.1538E+01 -1.8858E+01 S6 -2.8578E-01 8.2478E-01 -2.6377E+00 6.8833E+00 -1.2214E+01 1.3851E+01 -9.7340E+00 3.9240E+00 -7.0341E-01 S7 -8.7049E-03 1.1536E+00 -1.2630E+01 8.3372E+01 -3.5584E+02 1.0337E+03 -2.1030E+03 3.0327E+03 -3.0896E+03 S8 7.1945E-01 -4.4151E+00 1.9597E+01 -6.7995E+01 1.8530E+02 -3.8856E+02 6.0964E+02 -6.9823E+02 5.6994E+02 S9 1.0348E-01 -3.2262E+00 1.4589E+01 -3.9901E+01 7.4239E+01 -9.8481E+01 9.5360E+01 -6.8044E+01 3.5716E+01 S10 -1.2322E+00 2.3930E+00 -4.0264E+00 5.2346E+00 -5.1381E+00 3.7914E+00 -2.1000E+00 8.6983E-01 -2.6702E-01

[0110] Table 8

[0111] Figure 8A shows the axial chromatic aberration curve of the camera lens group of Embodiment 4, which represents the deviation of the convergence 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 field curvature and the sagittal field 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 light passes 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.

[0112] Example 5

[0113] The following refers to Figures 9 to 10D a description of the camera lens group according to Embodiment 5 of the present application. Figure 9 The structural schematic diagram of the camera lens group according to Embodiment 5 of the present application is shown.

[0114] As Figure 9 shown, the camera lens group sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging plane S13.

[0115] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative optical power, its object side surface S3 is a convex surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a concave surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging plane S13.

[0116] In this example, the total effective focal length f of the camera lens group is 3.12 mm, the total length TTL of the camera lens group is 4.39 mm, half of the diagonal length of the effective pixel region on the imaging plane S13 of the camera lens group ImgH is 3.00 mm, half of the maximum field angle of the camera lens group Semi-FOV is 43.2°, and the aperture value Fno of the camera lens group is 2.33.

[0117] Table 9 shows the basic parameter table of the camera lens group of Embodiment 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 5, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0118]

[0119] Table 9

[0120] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.8210E-02 -1.2133E-01 1.8615E+00 -1.6409E+01 8.2815E+01 -2.4954E+02 4.4218E+02 -4.2546E+02 1.7156E+02 S2 -2.8978E-03 -3.7810E-01 2.6847E+00 -1.6616E+01 6.1740E+01 -1.4399E+02 2.0429E+02 -1.6159E+02 5.4989E+01 S3 -2.1669E-01 6.6102E-01 -5.8092E+00 2.6030E+01 -7.7379E+01 1.4874E+02 -1.7935E+02 1.2404E+02 -3.7011E+01 S4 -1.9807E-01 4.9007E-01 -3.3140E-01 -3.3607E+00 1.3101E+01 -2.3571E+01 2.3725E+01 -1.2794E+01 2.8942E+00 S5 -4.6177E-01 9.7275E-01 -1.1317E+00 9.0917E-03 2.2830E+00 -3.8650E+00 3.1857E+00 -1.3714E+00 2.4728E-01 S6 -1.4094E-01 -5.1471E-02 4.0703E-01 -7.0451E-01 5.9805E-01 -2.7593E-01 9.4117E-02 -5.0913E-02 1.7741E-02 S7 -2.0486E-02 -8.3363E-02 -1.8872E-01 6.7468E-01 -9.9431E-01 9.3449E-01 -5.9237E-01 2.2262E-01 -3.5727E-02 S8 -2.9470E-01 6.1506E-01 -1.3361E+00 1.8737E+00 -1.6596E+00 9.3945E-01 -3.2547E-01 6.2288E-02 -5.0271E-03 S9 -1.0645E-01 -2.1300E-01 3.4154E-01 -1.8433E-01 -9.3797E-04 5.8784E-02 -3.7555E-02 1.2537E-02 -2.5383E-03 S10 -1.0963E-01 2.8183E-02 2.5745E-02 -3.1543E-02 1.5572E-02 -3.9964E-03 3.7302E-04 7.8562E-05 -3.0105E-05

[0121] Table 10

[0122] Figure 10A The axial chromatic aberration curve of the camera lens group of Example 5 is shown, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the lens. Figure 10B The astigmatism curve of the camera lens group of Example 5 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 10C The distortion curve of the camera lens group of Example 5 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 10D The longitudinal chromatic aberration curve of the camera lens group of Example 5 is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing 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.

[0123] Example 6

[0124] The following refers to Figures 11 to 12D A camera lens group according to Embodiment 6 of the present application is described. Figure 11 A schematic structural diagram of the camera lens group according to Embodiment 6 of the present application is shown.

[0125] As Figure 11 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0126] The first lens E1 has a positive optical power, its object surface S1 is convex, and its image surface S2 is convex. The second lens E2 has a positive optical power, its object surface S3 is convex, and its image surface S4 is convex. The third lens E3 has a negative optical power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive optical power, its object surface S7 is concave, and its image surface S8 is convex. The fifth lens E5 has a negative optical power, its object surface S9 is convex, and its image surface S10 is concave. The filter E6 has an object surface S11 and an image surface S12. Light from the object sequentially passes through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0127] In this example, the total effective focal length f of the camera lens group is 2.01 mm, the total length TTL of the camera lens group is 3.52 mm, half of the diagonal length of the effective pixel region on the imaging surface S13 of the camera lens group, ImgH, is 2.45 mm, half of the maximum field of view angle of the camera lens group, Semi-FOV, is 55.6°, and the aperture value Fno of the camera lens group is 2.29.

[0128] Table 11 shows the basic parameter table of the camera lens group of Example 6. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Example 6. Among them, each aspherical surface type can be defined by formula (1) given in the above Example 1.

[0129]

[0130] Table 11

[0131]

[0132]

[0133] Table 12

[0134] Figure 12A Shows the axial chromatic aberration curve of the camera lens group of Example 6, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 12B Shows the astigmatism curve of the camera lens group of Example 6, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C Shows the distortion curve of the camera lens group of Example 6, which represents the distortion magnitude values corresponding to different field of view angles. Figure 12D Shows the lateral chromatic aberration curve of the camera lens group of Example 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 camera lens group given in Example 6 can achieve good imaging quality.

[0135] Example 7

[0136] The following refers to Figures 13 to 14D describes the camera lens group according to Embodiment 7 of the present application. Figure 13 Shows a schematic structural diagram of the camera lens group according to Embodiment 7 of the present application.

[0137] As Figure 13 shown, the camera lens group sequentially includes, from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0138] The first lens E1 has a positive optical power, with its object side S1 being convex and its image side S2 being concave. The second lens E2 has a positive optical power, with its object side S3 being convex and its image side S4 being convex. The third lens E3 has a negative optical power, with its object side S5 being convex and its image side S6 being concave. The fourth lens E4 has a positive optical power, with its object side S7 being concave and its image side S8 being convex. The fifth lens E5 has a negative optical power, with its object side S9 being convex and its image side S10 being concave. The filter E6 has an object side S11 and an image side S12. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0139] In this example, the total effective focal length f of the camera lens group is 2.02 mm, the total length TTL of the camera lens group is 3.47 mm, half of the diagonal length of the effective pixel region on the imaging surface S13 of the camera lens group is ImgH = 2.30 mm, half of the maximum field of view angle of the camera lens group is Semi - FOV = 52.5°, and the f - number of the camera lens group is Fno = 2.28.

[0140] Table 13 shows the basic parameter table of the camera lens group of Example 7, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 14 shows the higher - order term coefficients for each aspherical mirror surface that can be used in Example 7, where each aspherical surface type can be defined by the formula (1) given in the above Example 1.

[0141]

[0142]

[0143] Table 13

[0144] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -5.8978E-01 7.0649E+00 -1.1905E+02 1.1974E+03 -7.7432E+03 3.1914E+04 -7.9937E+04 1.0997E+05 -6.3524E+04 S2 7.0895E-02 -4.4775E+00 -9.1856E+01 9.4416E+02 -4.1818E+03 1.0890E+04 -1.7168E+04 1.5014E+04 -5.5431E+03 S3 1.3333E+00 -6.1182E+00 -6.6335E+01 5.7812E+02 -1.9516E+03 3.6218E+03 -3.9124E+03 2.3188E+03 -5.8476E+02 S4 9.1592E-01 2.2162E+00 -3.2969E+01 1.4496E+02 -3.6874E+02 5.8220E+02 -5.5716E+02 2.9436E+02 -6.5528E+01 S5 -3.0573E-01 1.9898E-02 -5.6401E+00 3.4206E+01 -8.9544E+01 1.2482E+02 -9.6622E+01 3.9434E+01 -6.6662E+00 S6 -1.1511E-01 3.6840E-01 -5.1326E+00 2.1454E+01 -4.5541E+01 5.5767E+01 -4.0103E+01 1.5844E+01 -2.6704E+00 S7 4.0875E-01 5.4593E-01 -1.9558E+00 7.1719E-01 5.3320E+00 -1.0729E+01 9.2828E+00 -3.9431E+00 6.7156E-01 S8 -2.0127E-01 3.8874E-01 -9.3632E-01 1.8899E+00 -2.0990E+00 8.9824E-01 3.4943E-01 -4.5410E-01 1.1534E-01 S9 -7.4893E-01 1.4759E+00 -3.4879E+00 5.7580E+00 -6.2984E+00 4.4165E+00 -1.8961E+00 4.5111E-01 -4.5324E-02 S10 -7.7496E-02 -9.9233E-02 2.2714E-01 -2.4454E-01 1.5683E-01 -6.1838E-02 1.4651E-02 -1.9162E-03 1.0652E-04

[0145] Table 14

[0146] Figure 14A shows the axial chromatic aberration curve of the camera lens group of Example 7, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 14B shows the astigmatism curve of the camera lens group of Example 7, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 14C shows the distortion curve of the camera lens group of Example 7, which represents the distortion magnitude values corresponding to different field of view angles. Figure 14D shows the lateral chromatic aberration curve of the camera lens group of Example 7, which represents the deviation of different image heights on the imaging surface after the light rays pass through the lens. According to Figures 14A to 14D it can be seen that the camera lens group given in Example 7 can achieve good imaging quality.

[0147] Example 8

[0148] The following is a reference to Figures 15 to 16D a camera lens group according to Embodiment 8 of the present application is described. Figure 15 A schematic structural diagram of the camera lens group according to Embodiment 8 of the present application is shown.

[0149] As Figure 15 shown, the camera lens group sequentially includes, from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0150] The first lens E1 has a positive focal power, its object surface S1 is convex, and its image surface S2 is convex. The second lens E2 has a positive focal power, its object surface S3 is concave, and its image surface S4 is convex. The third lens E3 has a negative focal power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a positive focal power, its object surface S7 is concave, and its image surface S8 is convex. The fifth lens E5 has a negative focal power, its object surface S9 is convex, and its image surface S10 is concave. The filter E6 has an object surface S11 and an image surface S12. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface S13.

[0151] In this example, the total effective focal length f of the camera lens group is 2.02 mm, the total length TTL of the camera lens group is 3.26 mm, half of the diagonal length of the effective pixel region on the imaging surface S13 of the camera lens group is ImgH = 2.40 mm, half of the maximum field of view angle of the camera lens group is Semi-FOV = 55.0°, and the aperture value Fno of the camera lens group is 2.50.

[0152] Table 15 shows the basic parameter table of the camera lens group of Embodiment 8, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 16 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 8, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0153]

[0154] Table 15

[0155] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.5286E-01 3.1170E+00 -1.1051E+02 2.0221E+03 -2.3750E+04 1.7903E+05 -8.3729E+05 2.2039E+06 -2.4782E+06 S2 -6.1017E-01 -1.1571E+00 -8.1833E+00 3.7109E+02 -5.4323E+03 4.2784E+04 -1.8938E+05 4.4176E+05 -4.1722E+05 S3 -5.0149E-01 -5.2419E-01 7.1213E+00 1.1648E+01 -6.8504E+02 7.2802E+03 -3.7405E+04 9.3082E+04 -8.8528E+04 S4 2.7536E-01 -1.1674E+01 1.3102E+02 -8.2080E+02 3.3741E+03 -9.0967E+03 1.5224E+04 -1.4395E+04 6.0047E+03 S5 3.4014E-01 -7.8168E+00 6.0865E+01 -3.1076E+02 1.0772E+03 -2.5089E+03 3.7531E+03 -3.2544E+03 1.2360E+03 S6 1.5760E-01 -2.3519E+00 8.6479E+00 -1.9254E+01 2.6270E+01 -2.0085E+01 6.5059E+00 -2.3320E-02 -5.3823E-02 S7 -1.6758E-01 1.3433E+00 -8.0516E+00 4.7254E+01 -1.8796E+02 5.2316E+02 -1.0352E+03 1.4082E+03 -1.2346E+03 S8 7.3165E-01 -3.8818E+00 1.2496E+01 -3.0344E+01 5.8647E+01 -9.2910E+01 1.2186E+02 -1.2177E+02 8.1604E+01 S9 -6.7912E-01 1.3025E+00 -4.0068E+00 9.7517E+00 -1.6604E+01 1.9854E+01 -1.6839E+01 1.0150E+01 -4.3096E+00 S10 -5.7499E-02 -3.0428E-01 8.0661E-01 -1.2485E+00 1.3715E+00 -1.1178E+00 6.7980E-01 -3.0537E-01 9.9228E-02

[0156] Table 16

[0157] Figure 16A shows the axial chromatic aberration curve of the camera lens group of Embodiment 8, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the lens. Figure 16BShows the astigmatism curve of the camera lens group of Embodiment 8, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 16C Shows the distortion curve of the camera lens group of Embodiment 8, which represents the distortion magnitude values corresponding to different field angles. Figure 16D Shows the longitudinal chromatic aberration curve of the camera lens group of Embodiment 8, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 16A to 16D It can be seen that the camera lens group given in Embodiment 8 can achieve good imaging quality.

[0158] Example 9

[0159] The following refers to Figures 17 to 18D Describes the camera lens group according to Embodiment 9 of the present application. Figure 17 Shows the structural schematic diagram of the camera lens group according to Embodiment 9 of the present application.

[0160] As Figure 17 Shown, the camera lens group sequentially includes from the object side to the image side: a diaphragm STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an imaging surface S13.

[0161] The first lens E1 has a positive optical power, its object side surface S1 is a convex surface, and its image side surface S2 is a concave surface. The second lens E2 has a negative optical power, its object side surface S3 is a concave surface, and its image side surface S4 is a concave surface. The third lens E3 has a positive optical power, its object side surface S5 is a convex surface, and its image side surface S6 is a concave surface. The fourth lens E4 has a positive optical power, its object side surface S7 is a concave surface, and its image side surface S8 is a convex surface. The fifth lens E5 has a negative optical power, its object side surface S9 is a convex surface, and its image side surface S10 is a concave surface. The filter E6 has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through each surface S1 to S12 and finally forms an image on the imaging surface S13.

[0162] In this example, the total effective focal length f of the camera lens group is 3.19 mm, the total length TTL of the camera lens group is 4.40 mm, half of the diagonal length of the effective pixel area on the imaging surface S13 of the camera lens group is ImgH = 3.14 mm, half of the maximum field angle of the camera lens group is Semi-FOV = 43.8°, and the aperture value Fno of the camera lens group is 2.24.

[0163] Table 17 shows the basic parameter table of the camera lens group of Embodiment 9, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 18 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 9, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0164]

[0165] Table 17

[0166]

[0167]

[0168] Table 18

[0169] Figure 18A The axial chromatic aberration curve of the camera lens group of Example 9 is shown, which represents the deviation of the converging points of light rays with different wavelengths after passing through the lens. Figure 18B The astigmatism curve of the camera lens group of Example 9 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 18C The distortion curve of the camera lens group of Example 9 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 18D The longitudinal chromatic aberration curve of the camera lens group of Example 9 is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 18A to 18D It can be known that the camera lens group given in Example 9 can achieve good imaging quality.

[0170] In summary, Examples 1 to 9 respectively satisfy the relationships shown in Table 19.

[0171] Conditional / Example 1 2 3 4 5 6 7 8 9 <![CDATA[f×tan 2 (Semi-FOV)(mm)]]> 4.14 3.36 2.87 3.79 2.75 4.27 3.43 4.12 2.93 DT52 / DT11 4.08 3.71 3.56 3.80 3.47 4.43 3.26 4.68 3.76 TTL / ImgH 1.40 1.33 1.54 1.40 1.46 1.44 1.51 1.36 1.40 f45 / BFL 15.12 6.46 11.90 7.49 5.62 2.64 3.23 4.74 7.18 f1 / R1 3.56 2.66 3.50 3.59 2.77 1.35 5.75 1.83 2.53 R5 / R10 2.99 3.46 2.65 3.45 4.27 2.73 2.29 3.65 5.96 CT4 / T34 1.85 1.74 1.76 2.11 2.10 3.11 3.13 2.45 1.34 (SAG42 + SAG51) / (SAG42 - SAG51) 2.76 3.01 2.82 2.68 2.74 1.40 2.14 1.45 2.12 (ET4 + ET5) / (ET5 - ET4) 2.03 2.55 1.85 1.96 2.10 3.46 2.58 3.12 2.32 CT5 / CT3 2.13 1.05 2.13 1.82 0.96 1.53 1.65 1.53 1.19 f / f4 1.90 2.25 1.83 1.67 2.26 1.60 1.36 1.47 2.35

[0172] Table 19

[0173] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (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 camera lens group described above.

[0174] The above description is only the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. Camera lens group, characterized in that, It includes, in order from the object side to the image side along the optical axis: A diaphragm; A first lens with positive optical power, whose object side is convex and image side is concave; A second lens with negative optical power, whose image side is concave; A third lens with positive optical power, whose object side is convex and image side is concave; A fourth lens with positive optical power, whose object side is concave and image side is convex; and A fifth lens with negative optical power, whose object side is convex and image side is concave; Wherein, The number of lenses with optical power in the camera lens group is five; Half of the maximum field of view of the camera lens group, Semi-FOV, and the total effective focal length f of the camera lens group satisfy: 2.75mm ≤ tan 2 (Semi-FOV) × f ≤ 3.36mm; The distance SAG42 on the optical axis from the intersection of the image side of the fourth lens and the optical axis to the vertex of the effective radius of the image side of the fourth lens satisfies the following relationship with the distance SAG51 on the optical axis from the intersection of the object side of the fifth lens and the optical axis to the vertex of the effective radius of the object side of the fifth lens: 2.12 ≤ (SAG42 + SAG51) / (SAG42 - SAG51) ≤ 3.01; The distance TTL on the optical axis from the object side of the first lens to the imaging surface of the camera lens group satisfies the following relationship with half of the diagonal length ImgH of the effective pixel region on the imaging surface of the camera lens group: 1.33 ≤ TTL / ImgH < 1.46; The combined focal length f45 of the fourth lens and the fifth lens satisfies the following relationship with the distance BFL on the optical axis from the image side of the fifth lens to the imaging surface of the camera lens group: 5.62 ≤ f45 / BFL ≤ 7.18; and The effective focal length f1 of the first lens satisfies the following relationship with the curvature radius R1 of the object side of the first lens: 2.53 ≤ f1 / R1 ≤ 2.

77.

2. The camera lens group according to claim 1, characterized in that, The curvature radius R5 of the object side of the third lens satisfies the following relationship with the curvature radius R10 of the image side of the fifth lens: 3.46 ≤ R5 / R10 < 6.

00.

3. The camera lens group according to claim 1, characterized in that, The central thickness CT4 of the fourth lens on the optical axis satisfies the following relationship with the interval distance T34 between the third lens and the fourth lens on the optical axis: 1.30 < CT4 / T34 ≤ 2.

10.

4. The camera lens group according to claim 1, wherein, The edge thickness ET4 of the fourth lens satisfies the following relationship with the edge thickness ET5 of the fifth lens: 2.10 ≤ (ET4 + ET5) / (ET5 - ET4) ≤ 2.

55.

5. The camera lens group according to claim 1, characterized in that, The central thickness CT5 of the fifth lens on the optical axis satisfies the following relationship with the central thickness CT3 of the third lens on the optical axis: 0.96 ≤ CT5 / CT3 ≤ 1.

19.

6. The camera lens group according to claim 1, wherein, The total effective focal length f of the camera lens group satisfies the following relationship with the effective focal length f4 of the fourth lens: 2.25 ≤ f / f4 ≤ 2.

35.

7. The camera lens group according to claim 1, wherein, The maximum effective radius DT11 of the object side of the first lens satisfies the following relationship with the maximum effective radius DT52 of the image side of the fifth lens: 3.47 ≤ DT52 / DT11 ≤ 3.76.

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