CN111856725A - Camera lens group - Google Patents

Abstract

The present application discloses a photographing lens assembly, sequentially comprising, from an object side to an image side along an optical axis: a first lens having a negative refractive power, an object side surface of which is a concave surface; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having a positive refractive power, an object side surface of which is concave; a sixth lens having optical power; and a seventh lens having a negative optical power; wherein, the maximum field angle FOV of the camera lens group can satisfy: the FOV is more than or equal to 120.1 degrees; the maximum field angle FOV of the camera lens group and the total effective focal length f of the camera lens group can satisfy: 1 < f × tan (FOV/4) < 1.7.

Description

Camera lens group

technical field

The present application relates to the field of optical elements, and more particularly, to a camera lens group.

Background technique

A camera module is usually provided on a portable device such as a mobile phone, so that the mobile phone has a camera function. The camera module is usually provided with a charge-coupled device (CCD) type image sensor or a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) type image sensor, and is provided with a camera lens group. The camera lens group can collect the light on the object side, and the imaging light travels along the optical path of the camera lens group and illuminates the image sensor, and then the image sensor converts the light signal into an electrical signal to form image data.

The rapid development of mobile phone camera modules, especially the popularization of large-size and high-pixel CMOS chips, has made mobile phone manufacturers put forward more stringent requirements for the imaging quality of camera lens groups. In addition, with the improvement of the performance of CCD and CMOS components and the reduction of the size, higher requirements are also put forward for the high imaging quality of the corresponding camera lens group.

In order to meet the imaging requirements, a camera lens group capable of taking both wide-angle and high imaging quality into consideration is required.

SUMMARY OF THE INVENTION

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 refractive power, the object side of which is concave; a second lens with refractive power; The third lens with positive power; the fourth lens with power; the fifth lens with positive power, the object side of which is concave; the sixth lens with power; and the seventh lens with negative power lens; among them, the maximum field of view FOV of the camera lens group can satisfy: FOV≥120.1°; the maximum field of view FOV of the camera lens group and the total effective focal length f of the camera lens group can satisfy: 1<f×tan(FOV/ 4) < 1.7.

In one embodiment, the object side of the first lens to the image side of the seventh lens has at least one aspherical mirror surface.

In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the imaging lens group may satisfy: 0.5<f/f5<1.0.

In one embodiment, the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT21 of the object side of the second lens may satisfy: 0.5<DT31/DT21<1.

In one embodiment, the separation distance T12 between the first lens and the second lens on the optical axis and the separation distance T23 between the second lens and the third lens on the optical axis may satisfy: 0.9<T12/T23<1.4.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 1.5<CT1/CT2<2.2.

In one embodiment, the curvature radius R6 of the image side surface of the third lens and the effective focal length f3 of the third lens may satisfy: 0<|R6/f3|<0.8.

In one embodiment, the curvature radius R9 of the object side of the fifth lens, the curvature radius R10 of the image side of the fifth lens, and the effective focal length f5 of the fifth lens may satisfy: -2.1<(R9+R10)/f5≤- 1.57.

In one embodiment, the curvature radius R1 of the object side surface of the first lens and the total effective focal length f of the imaging lens group may satisfy: -1.8<R1/f<-1.2.

In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT6/CT5<0.7.

In one embodiment, the total effective focal length f of the imaging lens group and the effective focal length f1 of the first lens may satisfy: -0.35≦f/f1<0.

In one embodiment, the on-axis distance SAG51 between the intersection of the object side and the optical axis of the fifth lens to the apex of the effective radius of the object side of the fifth lens and the intersection of the object side and the optical axis of the sixth lens to the The on-axis distance SAG61 between the vertices of the effective radius on the side of the object can satisfy: 0.17≤SAG51/SAG61<0.6.

Another aspect of the present application provides an imaging lens assembly, which includes sequentially from an object side to an image side along an optical axis: a first lens with negative refractive power, the object side of which is concave; a second lens with refractive power ; the third lens with positive power; the fourth lens with power; the fifth lens with positive power, the object side of which is concave; the sixth lens with power; and the lens with negative power The seventh lens; wherein, the maximum field of view FOV of the camera lens group can satisfy: FOV≥120.1°; the separation distance T12 between the first lens and the second lens on the optical axis and the second lens and the third lens on the optical axis The separation distance T23 can satisfy: 0.9<T12/T23<1.4.

In one embodiment, the effective focal length f5 of the fifth lens and the total effective focal length f of the imaging lens group may satisfy: 0.5<f/f5<1.0.

In one embodiment, the maximum effective radius DT31 of the object side of the third lens and the maximum effective radius DT21 of the object side of the second lens may satisfy: 0.5<DT31/DT21<1.

In one embodiment, the maximum field of view FOV of the camera lens group and the total effective focal length f of the camera lens group may satisfy: 1<f×tan(FOV/4)<1.7.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 1.5<CT1/CT2<2.2.

In one embodiment, the curvature radius R6 of the image side surface of the third lens and the effective focal length f3 of the third lens may satisfy: 0<|R6/f3|<0.8.

In one embodiment, the curvature radius R9 of the object side of the fifth lens, the curvature radius R10 of the image side of the fifth lens, and the effective focal length f5 of the fifth lens may satisfy: -2.1<(R9+R10)/f5≤- 1.57.

In one embodiment, the curvature radius R1 of the object side surface of the first lens and the total effective focal length f of the imaging lens group may satisfy: -1.8<R1/f<-1.2.

In one embodiment, the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT6/CT5<0.7.

In one embodiment, the total effective focal length f of the imaging lens group and the effective focal length f1 of the first lens may satisfy: -0.35≦f/f1<0.

In one embodiment, the on-axis distance SAG51 between the intersection of the object side and the optical axis of the fifth lens to the apex of the effective radius of the object side of the fifth lens and the intersection of the object side and the optical axis of the sixth lens to the The on-axis distance SAG61 between the vertices of the effective radius on the side of the object can satisfy: 0.17≤SAG51/SAG61<0.6.

Seven lenses are used in the present application, and the above-mentioned camera lens group has miniaturization, wide angle, and imaging quality by rationally distributing the power of each lens, the surface shape, the central thickness of each lens, and the on-axis distance between each lens, etc. At least one beneficial effect is high, the imaging is clear, and the like. The miniaturized camera lens group is suitable as the rear lens of the mobile phone; the wide-angle camera lens group has the characteristics of large viewing angle and wide field of view, and the range of the scene observed at a certain point of view is less than that seen by the human eye at the same point of view. It can show a considerable range of clarity and can emphasize the perspective effect of the picture.

Description of drawings

Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the attached image:

1 shows a schematic structural diagram of the imaging lens group according to Embodiment 1 of the present application; FIGS. 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 1 curve;

3 shows a schematic structural diagram of the imaging lens group according to Embodiment 2 of the present application; FIGS. 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 2 curve;

5 shows a schematic structural diagram of the imaging lens group according to Embodiment 3 of the present application; FIGS. 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 3 curve;

7 shows a schematic structural diagram of the imaging lens group according to Embodiment 4 of the present application; FIGS. 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 4 curve;

9 shows a schematic structural diagram of the imaging lens group according to Embodiment 5 of the present application; FIGS. 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 5 curve;

11 shows a schematic structural diagram of the imaging lens group according to Embodiment 6 of the present application; FIGS. 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 6 curve;

13 shows a schematic structural diagram of the imaging lens group according to Embodiment 7 of the present application; FIGS. 14A to 14D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 7 curve;

15 shows a schematic structural diagram of the imaging lens group according to Embodiment 8 of the present application; FIGS. 16A to 16D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 8 curve;

17 shows a schematic structural diagram of the imaging lens group according to Embodiment 9 of the present application; FIGS. 18A to 18D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration of the imaging lens group in Embodiment 9 curve.

Detailed ways

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the present application and are not intended to 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.

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

In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shapes shown in the figures are shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are examples only and are not drawn strictly to scale.

Herein, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the convex position 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 concave position is not defined, it means that the lens surface is at least in the paraxial region. Concave. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.

It will also be understood that the terms "comprising", "comprising", "having", "comprising" and/or "comprising" when used in this specification mean that the stated features, elements and/or components are present , but does not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof. Furthermore, when an expression such as "at least one of" appears after a list of listed features, it modifies the entire listed feature and not the individual elements of the list. Furthermore, 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.

Unless otherwise defined, all terms (including technical and scientific terms) used herein 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 commonly used dictionaries) should be interpreted to have meanings consistent with their meanings in the context of the related art, and will not be interpreted in an idealized or overly formal sense unless It is expressly so limited herein.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

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

The imaging lens group according to the exemplary embodiment of the present application may include, for example, seven lenses having optical power, ie, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a third lens Seven lenses. The seven lenses are arranged in sequence from the object side to the image side along the optical axis. In the first lens to the seventh lens, any two adjacent lenses may have an air space between them.

In an exemplary embodiment, the first lens has negative power, and its object side can be concave; the second lens has positive power or negative power; the third lens has positive power; and the fourth lens has positive power The fifth lens has positive power, and its object side can be concave; the sixth lens has positive power or negative power; the seventh lens has negative power. By reasonably controlling the positive and negative distribution of the focal power of each component of the lens and the curvature of the lens surface, the imaging quality of the camera lens group can be effectively improved.

In an exemplary embodiment, the camera lens group of the present application may satisfy the conditional formula FOV≥120.1°, where FOV is the maximum field angle of the camera lens group. Satisfying FOV ≥ 120.1°, the camera lens group can have a wide field of view and clear images in a large field of view. More specifically, the FOV may satisfy: 120.1°≤FOV≤126.1°.

In an exemplary embodiment, the camera lens group of the present application may satisfy the conditional expression 1<f×tan(Semi-FOV/2)<1.7, where Semi-FOV is half of the maximum field angle of the camera lens group, f is the total effective focal length of the camera lens group. Satisfying 1<f×tan(Semi-FOV/2)<1.7, it is helpful for the camera lens group to achieve the imaging effect of a large image surface, and thus has higher optical performance, and the camera lens group has better processing technology . More specifically, Semi-FOV and f may satisfy: 1.30<f×tan(Semi-FOV/2)<1.45.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional formula 0.5<f/f5<1.0, where f5 is the effective focal length of the fifth lens, and f is the total effective focal length of the imaging lens group. Satisfying 0.5<f/f5<1.0, the fifth lens can bear a larger refractive power, which is beneficial to correct the aberration of the imaging lens group, and can shorten the total length of the imaging lens group. More specifically, f5 and f may satisfy: 0.81<f/f5<0.95.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 0.5<DT31/DT21<1, wherein DT31 is the maximum effective radius of the object side of the third lens, and DT21 is the maximum effective radius of the object side of the second lens Effective radius. By limiting the maximum effective radius ratio of the object side surface of the third lens to the object side surface of the second lens within this range, the size of the imaging lens group can be reduced, the miniaturization requirement can be met, and the resolution of the imaging lens group can be improved. More specifically, DT31 and DT21 can satisfy: 0.65<DT31/DT21<0.75.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 0.9<T12/T23<1.4, wherein T12 is the separation distance between the first lens and the second lens on the optical axis, T23 is the second lens and The separation distance of the third lens on the optical axis. Satisfying 0.9<T12/T23<1.4 is beneficial to improve the assembly stability of the lens of the camera lens group and the consistency of mass production, thereby improving the production yield of the camera lens group. More specifically, T12 and T23 may satisfy: 1.05<T12/T23<1.20.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional formula 1.5<CT1/CT2<2.2, where CT1 is the central thickness of the first lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis Center thickness. Satisfying 1.5<CT1/CT2<2.2, the chief ray angle of the camera lens group can be adjusted, thereby effectively improving the relative brightness of the camera lens group and improving the image surface clarity. More specifically, CT1 and CT2 may satisfy: 1.65<CT1/CT2<2.10.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 0<|R6/f3|<0.8, where R6 is the curvature radius of the image side surface of the third lens, and f3 is the effective focal length of the third lens. Satisfying 0<|R6/f3|<0.8, the optical distortion of the camera lens group can be reduced to ensure good imaging quality. More specifically, R6 and f3 may satisfy: 0.50<|R6/f3|<0.70.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional formula -2.1<(R9+R10)/f5≤-1.57, wherein R9 is the curvature radius of the object side surface of the fifth lens, and R10 is the fifth lens The curvature radius of the image side, f5 is the effective focal length of the fifth lens. Satisfying -2.1<(R9+R10)/f5≤-1.57 can effectively reduce the optical sensitivity of the fifth lens, and is conducive to mass production of the fifth lens. More specifically, R9, R10 and f5 may satisfy: -1.95<(R9+R10)/f5≤-1.57.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional formula -1.8<R1/f<-1.2, where R1 is the radius of curvature of the object side surface of the first lens, and f is the total effective focal length of the imaging lens group . Satisfying -1.8<R1/f<-1.2 is beneficial to control the incident angle of the off-axis field of view light of the camera lens group at the imaging surface, so as to increase its matching with the photosensitive element and the bandpass filter. More specifically, R1 and f may satisfy: -1.63<R1/f<-1.47.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 0.2<CT6/CT5<0.7, where CT5 is the central thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis Center thickness. Satisfying 0.2<CT6/CT5<0.7, the lens of the imaging lens group can obtain sufficient space and a higher degree of surface freedom, and at the same time, the field curvature and astigmatism of the imaging lens group can be better corrected. More specifically, CT5 and CT6 may satisfy: 0.30<CT6/CT5<0.54.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional formula -0.35≦f/f1<0, where f is the total effective focal length of the imaging lens group, and f1 is the effective focal length of the first lens. Satisfying -0.35≤f/f1<0 helps to adjust the position of the light and to shorten the overall length of the camera lens group. More specifically, f and f1 may satisfy: -0.35≦f/f1<-0.22.

In an exemplary embodiment, the imaging lens group of the present application may satisfy the conditional expression 0.17≤SAG51/SAG61<0.6, where SAG51 is the intersection of the object side surface of the fifth lens and the optical axis to the effective radius vertex of the object side surface of the fifth lens The on-axis distance between, SAG61 is the on-axis distance between the intersection of the object side of the sixth lens and the optical axis to the vertex of the effective radius of the object side of the sixth lens. Satisfying 0.17≤SAG51/SAG61<0.6, the deflection angle of the chief ray can be reasonably controlled, so as to improve the matching degree between the camera lens group and the chip, and it is beneficial to adjust the structure of the camera lens group. More specifically, SAG51 and SAG61 may satisfy: 0.17≤SAG51/SAG61<0.42.

In an exemplary embodiment, the above-mentioned camera lens group may further include at least one diaphragm. The diaphragm may be provided at an appropriate position as required, for example, between the second lens and the third lens. Optionally, the above-mentioned 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.

The imaging lens group according to the above-mentioned embodiments of the present application may employ multiple lenses, for example, the seven lenses described above. By reasonably allocating the focal power, surface shape, central thickness of each lens, and on-axis distance between each lens, etc., the volume of the camera lens group can be effectively reduced, the sensitivity of the camera lens group can be reduced, and the camera lens group can be improved. The processability of the group makes the camera lens group more conducive to production and processing and can be applied to portable electronic products. At the same time, the camera lens group of the present application also has excellent optical performance of wide angle, clear imaging, high resolution, and high imaging quality.

In the embodiments of the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the seventh lens is an aspheric mirror surface. The characteristic of aspheric lenses is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center of the lens to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion and astigmatism. After the aspherical lens is used, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface . Optionally, the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are aspherical mirror surfaces.

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 imaging lens group can be changed to obtain various results and advantages described in this specification. For example, although seven lenses have been described as an example in the embodiment, the imaging lens group is not limited to including seven lenses. If desired, the camera lens group may also include other numbers of lenses.

Specific examples of the imaging lens group applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

Example 1

The imaging lens group according to Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2D . FIG. 1 shows a schematic structural diagram of an imaging lens group according to Embodiment 1 of the present application.

As shown in FIG. 1 , the camera lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

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

Table 1

In Embodiment 1, the value of the total effective focal length f of the camera lens group is 2.26mm, the value of the aperture number Fno of the camera lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 5.85mm, the value of ImgH, which is half the diagonal length of the effective pixel area on the imaging surface S17, is 3.53mm, and the value of the maximum field of view angle FOV is 120.10° (that is, half of the maximum field of view angle FOV The value of Semi-FOV is 60.05°).

In Embodiment 1, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical formula :

Among them, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is the above table 1 is the reciprocal of the radius of curvature R); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the higher order coefficients A ₄ , A ₆ , A ₈ , A ₁₀ , A ₁₂ , A ₁₄ , A ₁₆ , A ₁₈ and A ₂₀ that can be used for each of the aspheric mirror surfaces S1 to S14 in Example 1 .

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.3482E-01 -1.8174E-01 1.4205E-01 -8.7992E-02 4.0423E-02 -1.3019E-02 2.7519E-03 -3.3981E-04 1.8404E-05 S2 3.3970E-01 -1.6705E-01 -2.2900E-01 1.0424E+00 -1.7487E+00 1.6372E+00 -8.8809E-01 2.5561E-01 -2.9477E-02 S3 7.4056E-02 -2.8660E-01 6.4410E-01 -1.4793E+00 2.3451E+00 -2.4675E+00 1.6187E+00 -5.8135E-01 8.5606E-02 S4 2.1422E-02 -3.2773E-01 2.4818E+00 -1.3389E+01 4.6750E+01 -1.0357E+02 1.4069E+02 -1.0690E+02 3.5032E+01 S5 3.0359E-02 -4.1570E-01 4.0274E+00 -2.5300E+01 9.7958E+01 -2.3914E+02 3.5837E+02 -3.0151E+02 1.0913E+02 S6 1.6527E-02 -8.3657E-02 5.8515E-01 -2.2534E+00 5.3042E+00 -7.7867E+00 6.7518E+00 -3.1119E+00 5.7494E-01 S7 -1.2277E-01 -1.5539E-02 1.6175E-01 -1.8555E-01 -4.3804E-02 2.8788E-01 -2.9015E-01 1.1876E-01 -1.4960E-02 S8 -1.0682E-01 2.5638E-02 6.1084E-02 -1.0237E-01 9.4557E-02 -6.0103E-02 2.4804E-02 -5.8586E-03 6.0269E-04 S9 5.2426E-02 -7.6643E-02 1.2042E-01 -1.2469E-01 8.3459E-02 -3.3754E-02 7.6643E-03 -8.5395E-04 3.1357E-05 S10 1.0159E-01 -6.3273E-02 3.7062E-02 -1.2357E-04 -1.0610E-02 6.5060E-03 -1.8590E-03 2.5951E-04 -1.4461E-05 S11 -9.5231E-03 -1.3000E-02 1.3284E-02 -8.6811E-03 1.5579E-03 6.4528E-04 -3.4764E-04 5.9770E-05 -3.6514E-06 S12 -7.2466E-03 -2.3734E-02 3.3438E-02 -2.3818E-02 9.2451E-03 -2.0985E-03 2.8224E-04 -2.1235E-05 7.0280E-07 S13 -4.0132E-02 -9.5386E-02 1.0244E-01 -5.4327E-02 1.7089E-02 -3.2794E-03 3.7620E-04 -2.3647E-05 6.2371E-07 S14 -9.3915E-02 3.1824E-02 -6.8209E-03 7.2975E-04 -1.5269E-06 -8.9552E-06 9.0476E-07 -2.6673E-08 -1.9072E-10

Table 2

FIG. 2A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 1, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 2B shows the astigmatism curve of the imaging lens group of Embodiment 1, which represents the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 2C shows the distortion curve of the imaging lens group of Embodiment 1, which represents the distortion magnitude values corresponding to different field angles. FIG. 2D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 2A to 2D , it can be seen that the imaging lens group provided in Embodiment 1 can achieve good imaging quality.

Example 2

The following describes the imaging lens group according to Embodiment 2 of the present application with reference to FIGS. 3 to 4D . In this embodiment and the following embodiments, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 3 shows a schematic structural diagram of an imaging lens group according to Embodiment 2 of the present application.

As shown in FIG. 3 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Embodiment 2, the value of the total effective focal length f of the camera lens group is 2.26 mm, the value of the aperture number Fno of the camera lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 5.97 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.63 mm, and the value of the maximum field of view angle FOV is 123.62°.

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

table 3

Table 4

FIG. 4A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 2, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 4B shows the astigmatism curve of the imaging lens group of Embodiment 2, which represents the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 4C shows the distortion curve of the imaging lens group of Embodiment 2, which represents the distortion magnitude values corresponding to different field angles. FIG. 4D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 4A to FIG. 4D , it can be seen that the imaging lens group provided in Embodiment 2 can achieve good imaging quality.

Example 3

The imaging lens group according to Embodiment 3 of the present application is described below with reference to FIGS. 5 to 6D . FIG. 5 shows a schematic structural diagram of an imaging lens group according to Embodiment 3 of the present application.

As shown in FIG. 5 , the camera lens group includes sequentially from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Example 3, the value of the total effective focal length f of the camera lens group is 2.30 mm, the value of the aperture number Fno of the camera lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.04 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.63 mm, and the value of the maximum field of view angle FOV is 126.00°.

Table 5 shows the basic parameter table of the imaging lens group of Embodiment 3, wherein the units of curvature radius, 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 Example 3, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

table 5

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.3204E-01 -1.8058E-01 1.4187E-01 -8.7836E-02 3.9730E-02 -1.2391E-02 2.4981E-03 -2.9129E-04 1.4871E-05 S2 3.3876E-01 -2.8725E-01 2.6959E-01 -1.0048E-01 -1.6744E-01 3.1778E-01 -2.4636E-01 9.1332E-02 -1.3008E-02 S3 8.4872E-02 -3.8963E-01 1.0868E+00 -2.8008E+00 5.3009E+00 -7.2707E+00 6.5929E+00 -3.4096E+00 7.5230E-01 S4 4.6972E-02 -4.1933E-01 2.3523E+00 -1.0254E+01 3.2597E+01 -7.4720E+01 1.1331E+02 -9.8535E+01 3.6826E+01 S5 9.5764E-03 1.0482E-01 -1.2349E+00 2.7399E+00 1.5023E+01 -1.2230E+02 3.5157E+02 -4.7728E+02 2.5386E+02 S6 -1.1224E-02 3.0158E-02 4.6882E-02 3.3473E-01 -3.0623E+00 9.1472E+00 -1.4188E+01 1.1453E+01 -3.8470E+00 S7 -1.4450E-01 7.3575E-02 -3.0461E-02 2.9945E-02 -1.4040E-01 2.5291E-01 -2.4600E-01 1.2500E-01 -2.6050E-02 S8 -1.0308E-01 2.8895E-02 5.5022E-02 -1.1077E-01 1.1079E-01 -6.8394E-02 2.5535E-02 -5.1995E-03 4.3535E-04 S9 5.3380E-02 -7.5723E-02 9.7149E-02 -7.0249E-02 2.7292E-02 -2.5962E-03 -2.0612E-03 7.7802E-04 -8.5375E-05 S10 8.0115E-02 3.5660E-02 -1.4961E-01 1.9396E-01 -1.3208E-01 5.2419E-02 -1.1888E-02 1.3855E-03 -6.1318E-05 S11 -1.4270E-02 -8.6604E-03 1.0685E-02 -7.8738E-03 1.7286E-03 4.2396E-04 -2.7670E-04 4.9524E-05 -3.0778E-06 S12 4.5307E-02 -9.9317E-02 1.1373E-01 -7.8989E-02 3.3383E-02 -8.7105E-03 1.3750E-03 -1.2073E-04 4.5345E-06 S13 -5.2237E-02 -8.8965E-02 1.0606E-01 -6.1094E-02 2.0921E-02 -4.4006E-03 5.5928E-04 -3.9553E-05 1.1998E-06 S14 -1.0546E-01 4.5105E-02 -1.3011E-02 2.2582E-03 -1.7587E-04 -1.1009E-05 3.7047E-06 -3.0682E-07 9.0405E-09

Table 6

FIG. 6A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 3, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 6B shows the astigmatism curve of the imaging lens group of Embodiment 3, which represents the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 6C shows the distortion curve of the imaging lens group of Embodiment 3, which represents the distortion magnitude values corresponding to different field angles. FIG. 6D shows the magnification chromatic aberration curve of the imaging lens group of Example 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 6A to 6D , it can be seen that the imaging lens group provided in Embodiment 3 can achieve good imaging quality.

Example 4

The imaging lens group according to Embodiment 4 of the present application is described below with reference to FIGS. 7 to 8D . FIG. 7 shows a schematic structural diagram of an imaging lens group according to Embodiment 4 of the present application.

As shown in FIG. 7 , the camera lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is concave, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Example 4, the value of the total effective focal length f of the imaging lens group is 2.37 mm, the value of the aperture number Fno of the imaging lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.06 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.53 mm, and the value of the maximum field of view angle FOV is 120.38°.

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

Table 7

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2075E-01 -1.7302E-01 1.4592E-01 -9.8977E-02 4.9318E-02 -1.6875E-02 3.7034E-03 -4.6722E-04 2.5795E-05 S2 3.3349E-01 -3.7893E-01 6.7105E-01 -1.0472E+00 1.1883E+00 -8.8267E-01 3.9191E-01 -9.3433E-02 9.1846E-03 S3 8.5962E-02 -3.1161E-01 4.4021E-01 1.0170E-01 -2.0476E+00 3.8997E+00 -3.7171E+00 2.0206E+00 -5.1119E-01 S4 5.2571E-02 -1.4742E-01 -1.1632E+00 1.3947E+01 -6.4046E+01 1.6041E+02 -2.3116E+02 1.8082E+02 -5.9357E+01 S5 -3.7647E-02 -5.9366E-01 9.2482E+00 -9.3120E+01 5.6339E+02 -2.1188E+03 4.8368E+03 -6.1438E+03 3.3270E+03 S6 -1.6793E-02 -4.4890E-02 1.3286E+00 -7.7027E+00 2.5337E+01 -5.0959E+01 6.1352E+01 -4.0495E+01 1.1224E+01 S7 -1.5923E-01 1.2054E-01 -3.6772E-02 -1.9143E-01 4.9494E-01 -6.3864E-01 4.6392E-01 -1.7960E-01 2.8495E-02 S8 -1.0669E-01 5.5268E-02 1.3796E-02 -8.2410E-02 1.0864E-01 -8.0575E-02 3.5416E-02 -8.5991E-03 8.8938E-04 S9 5.1545E-02 -7.8270E-02 1.1245E-01 -9.6901E-02 5.3770E-02 -1.9129E-02 4.1659E-03 -4.9758E-04 2.4381E-05 S10 8.0993E-02 2.8299E-02 -1.4185E-01 1.9379E-01 -1.4104E-01 6.2399E-02 -1.6688E-02 2.4699E-03 -1.5489E-04 S11 -3.3303E-02 5.3329E-02 -6.8408E-02 4.6430E-02 -1.8900E-02 4.6146E-03 -6.4467E-04 4.5693E-05 -1.1693E-06 S12 -2.2792E-02 7.3518E-02 -1.0294E-01 7.3736E-02 -3.1405E-02 8.1707E-03 -1.2705E-03 1.0830E-04 -3.8908E-06 S13 -4.9896E-02 -6.5705E-02 6.5027E-02 -2.8605E-02 6.6390E-03 -6.9092E-04 -8.8455E-06 8.0027E-06 -4.8236E-07 S14 -1.0138E-01 2.7548E-02 2.1127E-03 -4.6430E-03 1.6873E-03 -3.1654E-04 3.3435E-05 -1.8756E-06 4.3355E-08

Table 8

FIG. 8A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 4, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 8B shows the astigmatism curve of the imaging lens group of Embodiment 4, which represents the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 8C shows the distortion curve of the imaging lens group of Embodiment 4, which represents the distortion magnitude values corresponding to different field angles. FIG. 8D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 8A to 8D , it can be seen that the imaging lens group provided in Embodiment 4 can achieve good imaging quality.

Example 5

The imaging lens group according to Embodiment 5 of the present application is described below with reference to FIGS. 9 to 10D . FIG. 9 shows a schematic structural diagram of an imaging lens group according to Embodiment 5 of the present application.

As shown in FIG. 9 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is concave, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Embodiment 5, the value of the total effective focal length f of the imaging lens group is 2.33 mm, the value of the aperture number Fno of the imaging lens group is 2.78, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.21 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.53 mm, and the value of the maximum field of view angle FOV is 120.44°.

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

Table 9

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.2320E-01 -1.7344E-01 1.3774E-01 -8.7356E-02 4.0926E-02 -1.3282E-02 2.7896E-03 -3.3883E-04 1.8047E-05 S2 3.3527E-01 -2.9026E-01 3.2552E-01 -2.4246E-01 6.0218E-04 2.4683E-01 -2.7211E-01 1.2228E-01 -2.0085E-02 S3 8.3517E-02 -3.6053E-01 9.6700E-01 -2.5451E+00 5.0993E+00 -7.4541E+00 7.0082E+00 -3.6350E+00 7.8404E-01 S4 5.0482E-02 -5.2322E-01 3.5616E+00 -1.8834E+01 7.0249E+01 -1.7638E+02 2.7723E+02 -2.4318E+02 9.0671E+01 S5 1.3663E-02 -1.2181E-01 1.9080E+00 -2.3703E+01 1.5356E+02 -5.8016E+02 1.2776E+03 -1.5235E+03 7.5923E+02 S6 -5.0249E-03 2.6462E-03 1.6335E-01 -1.0691E-01 -1.7526E+00 6.8426E+00 -1.1995E+01 1.0508E+01 -3.7537E+00 S7 -1.4532E-01 4.1342E-02 -7.6305E-02 6.4790E-01 -2.1152E+00 3.5703E+00 -3.4112E+00 1.7399E+00 -3.6692E-01 S8 -8.5225E-02 -1.3858E-02 1.3179E-01 -1.9826E-01 1.7199E-01 -8.9345E-02 2.4244E-02 -1.8964E-03 -2.7961E-04 S9 4.9231E-02 -4.3166E-02 -4.9998E-03 8.5530E-02 -1.0942E-01 7.0623E-02 -2.5856E-02 5.1130E-03 -4.2583E-04 S10 5.6703E-02 1.2233E-01 -2.8820E-01 3.1669E-01 -1.9842E-01 7.5864E-02 -1.7500E-02 2.2470E-03 -1.2484E-04 S11 -3.4275E-02 8.4065E-02 -1.3680E-01 1.1195E-01 -5.4756E-02 1.6564E-02 -3.0394E-03 3.1077E-04 -1.3603E-05 S12 -3.8825E-03 9.5647E-03 -1.1551E-02 4.5639E-03 -4.7135E-04 -2.6707E-04 1.1063E-04 -1.6623E-05 9.1803E-07 S13 -7.0270E-02 -5.3964E-02 8.6160E-02 -5.6216E-02 2.1183E-02 -4.8957E-03 6.8740E-04 -5.4026E-05 1.8277E-06 S14 -1.0733E-01 5.6782E-02 -2.2384E-02 6.3684E-03 -1.2949E-03 1.8209E-04 -1.6704E-05 8.9260E-07 -2.0904E-08

Table 10

FIG. 10A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 5, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 10B shows the astigmatism curve of the imaging lens group of Embodiment 5, which represents the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 10C shows the distortion curve of the imaging lens group of Embodiment 5, which represents the distortion magnitude values corresponding to different field angles. FIG. 10D shows the magnification chromatic aberration curve of the imaging lens group of Example 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 10A to 10D , it can be seen that the imaging lens group provided in Embodiment 5 can achieve good imaging quality.

Example 6

The imaging lens group according to Embodiment 6 of the present application is described below with reference to FIGS. 11 to 12D . FIG. 11 shows a schematic structural diagram of an imaging lens group according to Embodiment 6 of the present application.

As shown in FIG. 11 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Example 6, the value of the total effective focal length f of the imaging lens group is 2.39 mm, the value of the aperture number Fno of the imaging lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.33 mm, the value of ImgH, which is half the diagonal length of the effective pixel area on the imaging plane S17, is 3.63 mm, and the value of the maximum field of view angle FOV is 123.64°.

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

Table 11

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.1972E-01 -1.6023E-01 1.1881E-01 -7.0151E-02 3.0683E-02 -9.3565E-03 1.8577E-03 -2.1431E-04 1.0876E-05 S2 3.1403E-01 -2.7261E-01 3.6991E-01 -5.1964E-01 5.9038E-01 -4.5577E-01 2.0820E-01 -5.0058E-02 4.8781E-03 S3 9.0578E-02 -4.4014E-01 1.3461E+00 -3.9935E+00 8.5367E+00 -1.2688E+01 1.2137E+01 -6.5179E+00 1.4740E+00 S4 6.5234E-02 -6.3075E-01 3.9198E+00 -1.8974E+01 6.3610E+01 -1.4215E+02 1.9965E+02 -1.5717E+02 5.2849E+01 S5 1.3268E-02 -5.7593E-02 9.5541E-01 -1.2535E+01 7.8741E+01 -2.7755E+02 5.5752E+02 -5.9655E+02 2.6333E+02 S6 8.0435E-03 -1.0309E-02 -6.8224E-02 9.0032E-01 -3.8167E+00 9.2451E+00 -1.3353E+01 1.0608E+01 -3.5717E+00 S7 -1.1771E-01 -7.0634E-02 -1.7448E-01 1.4793E+00 -4.1712E+00 6.6128E+00 -6.1009E+00 3.0433E+00 -6.3330E-01 S8 -5.1992E-02 -9.9425E-02 1.8194E-01 -1.5353E-01 4.4415E-02 6.4872E-02 -8.2575E-02 3.7515E-02 -6.2373E-03 S9 4.7066E-02 -4.1144E-02 2.2015E-02 4.9647E-03 -1.0008E-02 4.8691E-03 -1.3028E-03 2.0711E-04 -1.6314E-05 S10 8.3276E-02 1.0836E-02 -8.5513E-02 1.1022E-01 -7.0543E-02 2.6616E-02 -5.8812E-03 6.8744E-04 -3.2079E-05 S11 -6.3692E-03 -1.9151E-02 -2.8024E-04 1.3064E-02 -1.0464E-02 3.8881E-03 -7.7510E-04 8.0948E-05 -3.5120E-06 S12 3.4764E-02 -1.0331E-01 1.1498E-01 -7.2395E-02 2.7918E-02 -6.8795E-03 1.0727E-03 -9.7296E-05 3.9148E-06 S13 -1.0080E-01 -4.2462E-02 8.5233E-02 -5.4645E-02 1.8560E-02 -3.5689E-03 3.7826E-04 -1.9286E-05 2.9758E-07 S14 -1.1476E-01 6.1210E-02 -2.2927E-02 5.8514E-03 -1.0166E-03 1.1866E-04 -8.9569E-06 3.9794E-07 -7.9436E-09

Table 12

FIG. 12A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 6, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 12B shows astigmatism curves of the imaging lens group of Embodiment 6, which represent the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 12C shows the distortion curve of the imaging lens group of Embodiment 6, which represents the distortion magnitude values corresponding to different field angles. FIG. 12D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIG. 12A to FIG. 12D , it can be seen that the imaging lens group provided in Embodiment 6 can achieve good imaging quality.

Example 7

The imaging lens group according to Embodiment 7 of the present application is described below with reference to FIGS. 13 to 14D . FIG. 13 shows a schematic structural diagram of an imaging lens group according to Embodiment 7 of the present application.

As shown in FIG. 13 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is convex. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has negative refractive power, the object side S11 is convex, and the image side S12 is concave. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Embodiment 7, the value of the total effective focal length f of the imaging lens group is 2.34 mm, the value of the aperture number Fno of the imaging lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.07 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.63 mm, and the value of the maximum field of view angle FOV is 124.86°.

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

Table 13

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.3248E-01 -1.8416E-01 1.4705E-01 -9.2205E-02 4.2069E-02 -1.3181E-02 2.6623E-03 -3.1052E-04 1.5842E-05 S2 3.4732E-01 -3.0487E-01 2.9055E-01 -8.9551E-02 -2.3536E-01 4.0854E-01 -3.0045E-01 1.0455E-01 -1.3692E-02 S3 8.7549E-02 -4.1164E-01 1.2304E+00 -3.4094E+00 6.9351E+00 -9.8958E+00 9.0410E+00 -4.6415E+00 1.0122E+00 S4 3.9222E-02 -3.7228E-01 2.0464E+00 -9.3940E+00 3.3154E+01 -8.4125E+01 1.3668E+02 -1.2369E+02 4.7159E+01 S5 1.1768E-02 -2.9320E-02 8.7651E-01 -1.4886E+01 1.0230E+02 -3.8578E+02 8.2691E+02 -9.4721E+02 4.4921E+02 S6 -8.9899E-03 5.6191E-02 -2.5497E-01 2.0460E+00 -8.5729E+00 1.9780E+01 -2.6426E+01 1.9212E+01 -5.9290E+00 S7 -1.4832E-01 8.7225E-02 -8.2862E-02 2.1888E-01 -5.4788E-01 7.8052E-01 -6.6232E-01 3.1063E-01 -6.1914E-02 S8 -1.0410E-01 2.7093E-02 6.2534E-02 -1.1966E-01 1.1756E-01 -7.3103E-02 2.8030E-02 -5.9391E-03 5.2337E-04 S9 5.3292E-02 -7.9201E-02 1.1360E-01 -1.0513E-01 6.6459E-02 -2.7669E-02 7.1865E-03 -1.0613E-03 6.8200E-05 S10 9.0266E-02 -1.5671E-02 -4.4723E-02 7.9757E-02 -5.8317E-02 2.3525E-02 -5.1789E-03 5.3649E-04 -1.5998E-05 S11 -7.1492E-03 -2.0948E-02 2.5124E-02 -1.9372E-02 7.6244E-03 -1.4898E-03 1.0355E-04 7.2908E-06 -1.0666E-06 S12 -3.9342E-03 -3.0871E-02 4.3644E-02 -3.2152E-02 1.3258E-02 -3.2466E-03 4.7264E-04 -3.8034E-05 1.3085E-06 S13 -4.1341E-02 -1.0286E-01 1.1399E-01 -6.2690E-02 2.0547E-02 -4.1339E-03 5.0109E-04 -3.3618E-05 9.5928E-07 S14 -9.5297E-02 3.1158E-02 -4.3635E-03 -8.7995E-04 5.2698E-04 -1.0895E-04 1.1971E-05 -6.9395E-07 1.6778E-08

Table 14

FIG. 14A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 7, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. 14B shows an astigmatic curve of the imaging lens group of Embodiment 7, which represents the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 14C shows the distortion curve of the imaging lens group of Embodiment 7, which represents the distortion magnitude values corresponding to different field angles. FIG. 14D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 14A to 14D , it can be seen that the imaging lens group provided in Embodiment 7 can achieve good imaging quality.

Example 8

The imaging lens group according to Embodiment 8 of the present application is described below with reference to FIGS. 15 to 16D . FIG. 15 shows a schematic structural diagram of an imaging lens group according to Embodiment 8 of the present application.

As shown in FIG. 15 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is concave, and the image side S12 is convex. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Embodiment 8, the value of the total effective focal length f of the imaging lens group is 2.29 mm, the value of the aperture number Fno of the imaging lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 6.04 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.63 mm, and the value of the maximum field of view angle FOV is 124.70°.

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

Table 15

face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 2.3170E-01 -1.8667E-01 1.5284E-01 -9.8979E-02 4.6910E-02 -1.5331E-02 3.2381E-03 -3.9549E-04 2.1129E-05 S2 3.5382E-01 -3.3958E-01 4.4355E-01 -4.9549E-01 4.4280E-01 -2.9957E-01 1.4702E-01 -5.2859E-02 1.0036E-02 S3 8.6982E-02 -4.0757E-01 1.2096E+00 -3.3486E+00 6.9158E+00 -1.0218E+01 9.7687E+00 -5.2624E+00 1.2033E+00 S4 3.7236E-02 -3.5860E-01 1.9239E+00 -8.5274E+00 3.0255E+01 -8.0518E+01 1.3918E+02 -1.3373E+02 5.3846E+01 S5 5.3122E-03 1.6505E-01 -1.8144E+00 6.3629E+00 2.0206E+00 -9.6960E+01 3.3074E+02 -4.8146E+02 2.6608E+02 S6 -7.9031E-03 2.4075E-02 3.4195E-02 6.3994E-01 -4.3761E+00 1.1912E+01 -1.7447E+01 1.3549E+01 -4.4208E+00 S7 -1.4919E-01 9.0827E-02 -9.8613E-02 2.9154E-01 -7.2996E-01 1.0297E+00 -8.5704E-01 3.9269E-01 -7.6499E-02 S8 -1.0437E-01 2.9854E-02 5.4996E-02 -1.0335E-01 9.6026E-02 -5.6683E-02 2.0901E-02 -4.3040E-03 3.7030E-04 S9 5.3653E-02 -7.5085E-02 9.7877E-02 -7.9108E-02 4.1604E-02 -1.3102E-02 2.0155E-03 -3.9813E-05 -1.8256E-05 S10 8.6598E-02 -1.3891E-03 -7.2729E-02 1.0979E-01 -7.7307E-02 3.0768E-02 -6.8043E-03 7.3278E-04 -2.5837E-05 S11 -1.6270E-03 -4.0562E-02 5.6498E-02 -4.7322E-02 2.2701E-02 -6.4705E-03 1.0842E-03 -9.8125E-05 3.6894E-06 S12 1.2683E-02 -6.0563E-02 7.8399E-02 -5.6318E-02 2.3535E-02 -5.9294E-03 8.9099E-04 -7.3741E-05 2.5900E-06 S13 -4.2687E-02 -1.0394E-01 1.1588E-01 -6.3983E-02 2.1038E-02 -4.2437E-03 5.1562E-04 -3.4686E-05 9.9337E-07 S14 -9.4148E-02 3.0850E-02 -4.4771E-03 -7.6905E-04 5.0215E-04 -1.0788E-04 1.2288E-05 -7.3863E-07 1.8512E-08

Table 16

FIG. 16A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 8, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. 16B shows an astigmatic curve of the imaging lens group of Embodiment 8, which represents the meridional curvature of the image plane and the sagittal image plane curvature. FIG. 16C shows the distortion curve of the imaging lens group of the embodiment 8, which represents the distortion magnitude values corresponding to different field angles. FIG. 16D shows the magnification chromatic aberration curve of the imaging 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 FIGS. 16A to 16D , it can be seen that the imaging lens group provided in Embodiment 8 can achieve good imaging quality.

Example 9

The imaging lens group according to Embodiment 9 of the present application is described below with reference to FIGS. 17 to 18D . FIG. 17 shows a schematic structural diagram of an imaging lens group according to Embodiment 9 of the present application.

As shown in FIG. 17 , the imaging lens group sequentially includes from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a diaphragm STO, a third lens E3, a fourth lens E4, and a fifth lens E5 , the sixth lens E6, the seventh lens E7 and the filter E8.

The first lens E1 has negative refractive power, the object side S1 is concave, and the image side S2 is concave. The second lens E2 has positive refractive power, the object side S3 is convex, and the image side S4 is concave. The third lens E3 has positive refractive power, the object side S5 is convex, and the image side S6 is convex. The fourth lens E4 has negative refractive power, the object side S7 is convex, and the image side S8 is concave. The fifth lens E5 has positive refractive power, the object side S9 is concave, and the image side S10 is convex. The sixth lens E6 has positive refractive power, the object side S11 is convex, and the image side S12 is concave. The seventh lens E7 has negative refractive power, the object side S13 is convex, and the image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The imaging lens group has an imaging surface S17 on which the light from the object passes through each of the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

In Embodiment 8, the value of the total effective focal length f of the camera lens group is 2.28 mm, the value of the aperture number Fno of the camera lens group is 2.28, and the axial distance from the object side S1 of the first lens E1 to the imaging plane S17 is TTL The value is 5.96 mm, the value of ImgH which is half the diagonal length of the effective pixel area on the imaging plane S17 is 3.63 mm, and the value of the maximum field of view angle FOV is 124.60°.

Table 17 shows the basic parameter table of the imaging lens group of Embodiment 9, wherein the units of curvature radius, thickness/distance, and focal length are all millimeters (mm). Table 18 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in Example 9, where each aspherical surface type can be defined by the formula (1) given in Example 1 above.

Table 17

Table 18

FIG. 18A shows the on-axis chromatic aberration curve of the imaging lens group of Embodiment 9, which represents the deviation of the converging focus of light of different wavelengths after passing through the lens. FIG. 18B shows the astigmatism curve of the imaging lens group of Embodiment 9, which indicates the meridional curvature of the image plane and the sagittal curvature of the image plane. FIG. 18C shows the distortion curve of the imaging lens group of the ninth embodiment, which represents the distortion magnitude values corresponding to different field angles. FIG. 18D shows the magnification chromatic aberration curve of the imaging lens group of Embodiment 9, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to FIGS. 18A to 18D , it can be seen that the imaging lens group provided in the ninth embodiment can achieve good imaging quality.

In conclusion, Examples 1 to 9 satisfy the relationships shown in Table 19, respectively.

Conditional Expression\Example 1 2 3 4 5 6 7 8 9 f/f5 0.84 0.85 0.87 0.94 0.87 0.87 0.89 0.88 0.86 f/f1 -0.34 -0.33 -0.32 -0.22 -0.35 -0.32 -0.33 -0.34 -0.34 R1/f -1.62 -1.61 -1.49 -1.62 -1.59 -1.51 -1.51 -1.62 -1.61 CT6/CT5 0.52 0.44 0.31 0.35 0.34 0.46 0.35 0.42 0.48 (R9+R10)/f5 -1.90 -1.86 -1.77 -1.94 -1.78 -1.57 -1.87 -1.89 -1.89 f×tan(FOV/4) 1.31 1.35 1.41 1.37 1.35 1.43 1.42 1.39 1.38 |R6/f3| 0.66 0.15 0.68 0.54 0.66 0.66 0.67 0.67 0.66 DT31/DT21 0.69 0.74 0.70 0.68 0.67 0.73 0.69 0.68 0.70 T12/T23 1.13 1.09 1.09 1.19 1.08 1.12 1.09 1.08 1.09 CT1/CT2 1.76 1.75 1.72 2.09 1.73 1.86 1.67 1.75 1.78 SAG51/SAG61 0.30 0.24 0.24 0.23 0.17 0.40 0.21 0.27 0.24

Table 19

The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may 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 apparatus is equipped with the above-described imaging lens group.

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

Claims (10)

1. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a negative refractive power, an object side surface of which is a concave surface;

a second lens having an optical power;

a third lens having a positive optical power;

a fourth lens having an optical power;

a fifth lens having a positive refractive power, an object side surface of which is concave;

a sixth lens having optical power; and

a seventh lens having a negative optical power;

wherein, the maximum field angle FOV of the camera lens group satisfies:

FOV≥120.1°；

the maximum field angle FOV of the camera lens group and the total effective focal length f of the camera lens group satisfy:

1＜f×tan(FOV/4)＜1.7。

2. the imaging lens group of claim 1, wherein the effective focal length f5 of the fifth lens and the total effective focal length f of the imaging lens group satisfy:

0.5＜f/f5＜1.0。

3. the imaging lens group of claim 1, wherein the maximum effective radius DT31 of the object side surface of the third lens and the maximum effective radius DT21 of the object side surface of the second lens satisfy:

0.5＜DT31/DT21＜1。

4. the imaging lens group according to claim 1, wherein a separation distance T12 on the optical axis between the first lens and the second lens and a separation distance T23 on the optical axis between the second lens and the third lens satisfy:

0.9＜T12/T23＜1.4。

5. the imaging lens group of claim 1, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT2 of the second lens on the optical axis satisfy:

1.5＜CT1/CT2＜2.2。

6. the imaging lens group of claim 1, wherein the radius of curvature R6 of the image side surface of the third lens and the effective focal length f3 of the third lens satisfy:

0＜|R6/f3|＜0.8。

7. the imaging lens group of claim 1, wherein the radius of curvature R9 of the object-side surface of the fifth lens, the radius of curvature R10 of the image-side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy:

-2.1＜(R9+R10)/f5≤-1.57。

8. the imaging lens group of claim 1, wherein the radius of curvature R1 of the object side surface of the first lens and the total effective focal length f of the imaging lens group satisfy:

-1.8＜R1/f＜-1.2。

9. the image capturing lens group according to any one of claims 1 to 8, wherein an on-axis distance SAG51 between an intersection point of the object side surface of the fifth lens and the optical axis to an effective radius vertex of the object side surface of the fifth lens and an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis to an effective radius vertex of the object side surface of the sixth lens satisfy:

0.17≤SAG51/SAG61＜0.6。

10. the image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a negative refractive power, an object side surface of which is a concave surface;

a second lens having an optical power;

a third lens having a positive optical power;

a fourth lens having an optical power;

a fifth lens having a positive refractive power, an object side surface of which is concave;

a sixth lens having optical power; and

a seventh lens having a negative optical power;

wherein, the maximum field angle FOV of the camera lens group satisfies:

FOV≥120.1°；

a separation distance T12 of the first lens and the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy:

0.9＜T12/T23＜1.4。

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