CN214845991U - Imaging lens, image capturing module and electronic device - Google Patents

Abstract

The utility model discloses an imaging lens, get for instance module and electron device. The imaging lens system of the present invention includes a prism, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element along an optical axis in order from an object side to an image side, wherein the object side of the first lens element is a convex surface at a paraxial region, and the imaging lens system satisfies the following conditional expressions: f ImgH/f1 is not less than 4mm and not more than 8 mm. The utility model discloses an imaging lens passes through the loading prism in order to get for instance module loading mode change with the light path deflection, is favorable to the frivolous of carrier equipment. Through reasonable distribution focal power, the long-focus characteristic is realized, better optical performance is obtained, a larger imaging surface is ensured to meet a larger light receiving area, the integral brightness of imaging is improved, and the optical lens can be applied to various types of portable electronic equipment capable of shooting.

Description

Imaging lens, image capturing module and electronic device

Technical Field

The utility model relates to an optical imaging technique, in particular to imaging lens, get for instance module and electron device.

Background

In order to meet the requirements of shooting far scenes, the lens has a shallow depth of field, highlights main imaging objects, is matched with a high-pixel and large-size chip, and has various long-focus lens styles. The existing three-piece, four-piece and five-piece lens modules have technical bottlenecks. Based on the same chip, the total length of the lens can be increased in order to obtain higher image definition by the conventional lens, so that the lightness and thinness of the lens are restricted. How to balance the longer focal length and miniaturization of the lens is a difficult point in lens design.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an imaging lens, get for instance module and electron device.

The imaging lens system of the present invention includes, in order from an object side to an image side along an optical axis, a prism, a first lens element with refractive power, a second lens element with refractive power, a third lens element with refractive power, a fourth lens element with refractive power, a fifth lens element with refractive power, a sixth lens element with refractive power, and a seventh lens element with refractive power, wherein an object-side surface of the first lens element is convex at a paraxial region. The imaging lens satisfies the conditional expression: f is not less than 4mm and ImgH/f1 is not less than 8 mm; wherein f is an effective focal length of the imaging lens, ImgH is a half of an image height corresponding to a maximum field angle of the imaging lens, and f1 is an effective focal length of the first lens.

The utility model discloses embodiment's imaging lens passes through the loading prism, with the light path deflection, makes imaging lens loading mode change to thickness influence carrier equipment frivolousization problem has been solved. And through reasonable distribution focal power, realize the long focal characteristic, obtain better optical property, guarantee that great imaging surface satisfies great receipts light area, promote formation of image whole luminance, but be applied to the portable electronic equipment of multiple type camera shooting.

In some embodiments, the imaging lens satisfies the following conditional expression: TL/EPD is more than or equal to 1 and less than or equal to 3; wherein TL is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the imaging lens, and EPD is an entrance pupil diameter of the imaging lens. Therefore, the total length of the imaging lens is small, the light incoming quantity is increased, and the integral imaging brightness is improved.

In some embodiments, the imaging lens satisfies the following conditional expression: and EPD/f is more than or equal to 0 and less than or equal to 1, and the EPD is the entrance pupil diameter of the imaging lens. Therefore, the light flux amount and the image plane back shift can be balanced, and the characteristics of large aperture and long focus can be realized.

In some embodiments, the imaging lens satisfies the following conditional expression: 1mm^-1≤MVd/f≤6mm^-1(ii) a Wherein MVd is an average value of abbe numbers of the first lens to the seventh lens. Therefore, chromatic aberration can be balanced, the high Abbe number and the low Abbe number correspond to different refractive indexes, and the long-focus characteristic and the optical imaging performance can be realized through different material combinations.

In some embodiments, the imaging lens satisfies the following conditional expression: FOV/f is more than or equal to 1deg/mm and less than or equal to 6 deg/mm; wherein the FOV is the maximum field angle of the imaging lens. Therefore, the field angle can be controlled within a certain range, the focal length can reach the long-focus distance, and the telephoto function is realized.

In some embodiments, the imaging lens satisfies the following conditional expression: 0mm^-1≤ET1/(CT1*f)≤0.5mm^-1(ii) a Wherein ET1 is a thickness of a maximum effective radius edge of the first lens, and CT1 is a distance on the optical axis from an object-side surface of the first lens to an image-side surface of the first lens. Thus, molding of the first lens can be facilitated and a telephoto characteristic can be realized.

In some embodiments, the imaging lens satisfies the following conditional expression: 0mm^-1≤ET7/(CT7*f)≤1mm^-1(ii) a Wherein ET7 is a thickness of a maximum effective radius edge of the seventh lens, and CT7 is a distance on the optical axis from an object-side surface of the seventh lens to an image-side surface of the seventh lens. Thereby, the molding of the seventh lens can be facilitated and the telephoto characteristic can be realized.

In some embodiments, the imaging lens satisfies the following conditional expression: SAG32/CT34 is more than or equal to 0 and less than or equal to 1; SAG32 is the distance from the intersection point of the image side surface of the third lens and the optical axis to the edge of the optically effective area of the image side surface of the third lens in the optical axis direction, and CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens in the optical axis direction. Therefore, through the reasonable layout of the optical structure, the direction change of light rays entering the system can be slowed down, the intensity of stray light is favorably reduced, the sensitivity of system performance change is reduced, and the yield of third lenses is improved.

In some embodiments, the imaging lens satisfies the following conditional expression: -1. ltoreq. SAG41/CT 34. ltoreq.0; SAG41 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the edge of the optically effective area of the object side surface of the fourth lens in the optical axis direction, and CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens in the optical axis direction. Therefore, through the reasonable layout of the optical structure, the direction change of light rays entering the system can be slowed down, the ghost image intensity is reduced, the sensitivity of system performance change is reduced, and the yield of the fourth lens is improved.

In some embodiments, the imaging lens satisfies the following conditional expression: TL/ImgH is more than or equal to 2 and less than or equal to 5; wherein TL is a distance on the optical axis from the object-side surface of the first lens element to the image plane. Therefore, the miniaturization of the camera lens group is favorably realized.

The utility model discloses get for instance the module includes above-mentioned arbitrary embodiment imaging lens and electronic photosensitive element. The electronic photosensitive element is arranged on the image side of the imaging lens.

The utility model discloses get for instance the module and dispose through reasonable lens for imaging lens not only has higher imaging quality and optical performance, can also realize imaging lens's frivolousization, is favorable to imaging lens's portableization.

The utility model discloses embodiment's electronic device includes casing and above-mentioned embodiment get for instance the module. The image capturing module is installed on the shell.

The utility model discloses embodiment's electron device is through reasonable lens configuration for imaging lens not only has higher imaging quality and optical performance, can also realize imaging lens's frivolousization, is favorable to imaging lens's portableization. The shell can protect the image capturing module, the image capturing module is exposed from the shell to acquire images when in use, and the image capturing module is protected in the shell when not in use, so that the safety is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an imaging lens in a first embodiment of the present invention;

fig. 2 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 3 is a schematic structural diagram of an imaging lens according to a second embodiment of the present invention;

fig. 4 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging lens in the second embodiment;

fig. 5 is a schematic structural view of an imaging lens in a third embodiment of the present invention;

fig. 6 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging lens in the third embodiment;

fig. 7 is a schematic structural view of an imaging lens in a fourth embodiment of the present invention;

fig. 8 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) -of the imaging lens in the fourth embodiment;

fig. 9 is a schematic structural view of an imaging lens in a fifth embodiment of the present invention;

fig. 10 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) -of the imaging lens in the fifth embodiment;

fig. 11 is a schematic structural view of an imaging lens in a sixth embodiment of the present invention;

fig. 12 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) -of the imaging lens in the sixth embodiment;

fig. 13 is a schematic structural view of an imaging lens in a seventh embodiment of the present invention;

fig. 14 is a spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%) of the imaging lens in the seventh embodiment.

Reference numerals:

an imaging lens 10, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, a prism 8, an incident surface 81, a reflection surface 82, an exit surface 83, an infrared filter 9, and an optical axis OO'.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1,3, 5, 7, 9, 11, and 13 together, the imaging lens assembly 10 of the present invention includes, in order from an object side to an image side along an optical axis OO ', a prism 8, a first lens element 1 with positive refractive power, a second lens element 2 with refractive power, a third lens element 3 with refractive power, a fourth lens element 4 with refractive power, a fifth lens element 5 with refractive power, a sixth lens element 6 with refractive power, and a seventh lens element 7 with refractive power, wherein an object-side surface S1 of the first lens element 1 is convex at a position near the optical axis OO'.

When the imaging lens 10 is used for imaging, light rays emitted or reflected by a subject enter the imaging lens 10 from the object side direction. The triple prism 8 is provided with an incident surface 81, a reflecting surface 82 and an emergent surface 83, light is incident from the incident surface 81, is reflected by the reflecting surface 82 and is emitted from the emergent surface 83, the propagation direction of the light is changed by the prism 8, the light path is deflected, the arrangement of the imaging lens 10 can be facilitated, all lenses do not need to be arranged along the direction of the light path entering from the object side, the loading mode of the imaging lens 10 is changed, the imaging lens 10 is arranged along the direction of the light path entering from the object side, namely, the light path is arranged at a certain angle with the thickness direction of a carrier provided with the imaging lens 10, and therefore the problem that the thickness of the carrier is influenced by the thickness of the lens is solved. After being deflected, the light rays sequentially pass through the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 and the seventh lens 7 and finally converge on an imaging surface for imaging.

In some embodiments, the imaging lens 10 further includes a stop STO, which may be an aperture stop or a field stop. The setting is between prism 8 to first lens 1, can control the light quantity better, promotes the whole luminance of formation of image, guarantees that the imaging surface satisfies great receipts light area, promotes the formation of image effect.

In some embodiments, the prism 8 is an isosceles right triangular prism, so that the isosceles right triangular prism can deflect the light path by 90 degrees, and if the incident direction of the prism 8 is set along the thickness direction of the carrier, the imaging lens 10 can be set along the width or length direction of the carrier, which is beneficial to reducing the thickness of the carrier.

In the scheme of the application, the imaging lens 10 satisfies the conditional expression: f is not less than 4mm and ImgH/f1 is not less than 8 mm; where f is the effective focal length of the imaging lens 10, ImgH is half of the image height corresponding to the maximum field angle of the imaging lens 10, and f1 is the effective focal length of the first lens element 1. That is, the result of dividing f by ImgH by f1 may be any value within the interval [4,8], and for example, the value may be 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, or the like.

By the arrangement, focal power can be reasonably distributed, a long-focus characteristic is realized, and through the design, the imaging lens 10 can meet the requirements of high resolution, lightness and thinness, and the portability of the imaging lens 10 is improved. Preferably, the imaging lens 10 satisfies the conditional expression: 4.344mm is less than or equal to f × ImgH/f1 is less than or equal to 7.857 mm.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: TL/EPD is more than or equal to 1 and less than or equal to 3; where TL is a distance from the object-side surface S1 of the first lens element 1 to the image plane of the imaging lens 10 on the optical axis OO', and EPD is an entrance pupil diameter of the imaging lens 10. That is, the division of TL by EPD can be any value in the interval [1,3], e.g., 1, 1.2, 1.6, 2, 2.4, 2.8, 3, etc.

When the imaging lens 10 satisfies the condition that TL/EPD is more than or equal to 1 and less than or equal to 3, the overall length of the imaging lens 10 is small, the light incoming amount is increased, and the overall imaging brightness is improved. Preferably, the imaging lens 10 satisfies the conditional expression: TL/EPD is more than or equal to 1.865 and less than or equal to 2.787.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: EPD/f is more than or equal to 0 and less than or equal to 1. That is, the EPD divided by f may be any value within the interval [0,1], e.g., 0, 0.2, 0.4, 0.6, 0.8, 1, etc.

When the imaging lens 10 satisfies the conditional expression 0 or more and EPD/f or less than 1, the light flux amount and the image plane backward movement can be balanced, and the characteristics of large aperture and long focus can be realized. Preferably, the imaging lens 10 satisfies the conditional expression: EPD/f is more than or equal to 0.357 and less than or equal to 0.51.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: 1mm^-1≤MVd/f≤6mm^-1(ii) a Wherein MVd is an average value of abbe numbers of the first lens 1 to the seventh lens 7. That is, the result of dividing MVd by f may be the interval [1,6]]Any value within, for example, the value may also be 1, 2, 3, 4, 5, 6, etc.

The imaging lens 10 satisfies the conditional expression 1mm^-1≤MVd/f≤6mm^-1The chromatic aberration can be balanced. It is understood that the high abbe number and the low abbe number correspond to different refractive indexes, and the long-focus characteristic and the optical imaging performance can be realized by different material combinations. The abbe numbers of the first lens 1 to the seventh lens 7 are different, that is, the refractive indexes of the first lens 1 to the seventh lens 7 are different, and the average abbe numbers of the first lens 1 to the seventh lens 7 are set within the above range by selecting the specifications of the lenses, so that the preferable telephoto characteristic and optical imaging performance can be realized by different combinations. Preferably, the imaging lens 10 satisfies the conditional expression: 1.862mm^-1≤MVd/f≤4.431mm^-1。

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: FOV/f is more than or equal to 1deg/mm and less than or equal to 6 deg/mm; where FOV is the maximum field angle of the imaging lens 10. That is, the division of FOV by f may be any value within the interval [1,6], for example, the value may also be 1, 2, 3, 4, 5, 6, etc.

When the imaging lens 10 satisfies the conditional expression that FOV/f is not less than 1deg/mm and not more than 6deg/mm, the field angle can be controlled within a certain range, the focal length of the imaging lens 10 can reach the telephoto distance, and the telephoto function is realized. Preferably, the imaging lens 10 satisfies the conditional expression: FOV/f is more than or equal to 1.134 and less than or equal to 5.051.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: 0mm^-1≤ET1/(CT1*f)≤0.5mm^-1(ii) a ET1 is the thickness of the maximum effective radius edge of the first lens 1, and CT1 is the distance between the object-side surface S1 and the image-side surface F1 of the first lens 1 on the optical axis. That is, the division of ET1 by CT1 and f can be the interval [0,0.5 ]]Any value within, for example, the value may also be 0, 0.1, 0.2, 0.3, 0.4, 0.5, etc.

The imaging lens 10 satisfies the conditional expression of 0mm^-1≤ET1/(CT1*f)≤0.5mm^-1When this is done, the molding of the first lens 1 can be facilitated, and the telephoto characteristic can be realized. Preferably, the imaging lens 10 satisfies the conditional expression: 0.018mm^-1≤ET1/(CT1*f)≤0.068mm^-1。

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: ET7/(CT7 f) is not less than 0 and not more than 1mm^-1(ii) a ET7 is the edge thickness of the maximum effective radius of the seventh lens element 7, and CT7 is the distance from the object-side surface S7 to the image-side surface F7 of the seventh lens element 7 on the optical axis OO'. That is, the division of ET7 by CT7 and then by f can be the interval [0, 1%]For example, the value may be 0, 0.2, 0.4, 0.6, 0.8, 1, or the like.

The imaging lens 10 satisfies the conditional expression 0 ≤ ET7/(CT7 ≤ f) 1mm^-1Then, the molding of the seventh lens 7 can be facilitated and the telephoto characteristic can be realized. Preferably, the imaging lens 10 satisfies the conditional expression: ET7/(CT7 f) is not less than 0.038 and not more than 0.118.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: SAG32/CT34 is more than or equal to 0 and less than or equal to 1; the SAG32 is a distance in the optical axis direction from the intersection point of the image-side surface F3 of the third lens 3 and the optical axis to the optically effective area edge of the image-side surface F3 of the third lens 3, and the CT34 is a distance in the optical axis direction from the image-side surface F3 of the third lens 3 to the object-side surface S4 of the fourth lens 4. That is, the result of dividing SAG32 by CT34 may be any value within the interval [0,1], for example, the value may also be 0, 0.2, 0.4, 0.6, 0.8, 1, etc.

When the imaging lens 10 meets the conditional expression that SAG32/CT34 is not less than 1 and is not less than 0, the change of the direction of light entering the imaging lens 10 can be slowed down through the reasonable layout of the optical structure, the intensity of stray light is favorably reduced, the sensitivity of system performance change is reduced, and the yield of the third lens 3 is improved. Preferably, the imaging lens 10 satisfies the conditional expression: 0.167 is less than or equal to SAG32/CT34 is less than or equal to 0.411.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: -1. ltoreq. SAG41/CT 34. ltoreq.0; here, SAG41 is a distance in the optical axis direction from the intersection point of the object-side surface S4 of the fourth lens 4 and the optical axis to the optically effective region edge of the object-side surface S4 of the fourth lens 4, and CT34 is a distance in the optical axis direction from the image-side surface F3 of the third lens 3 to the object-side surface S4 of the fourth lens 4. That is, the result of dividing SAG41 by CT34 can be any value within the interval [ -1,0], e.g., the value can also be-1, -0.8, -0.6, -0.4, -0.2, 0, etc.

When the imaging lens 10 meets the conditional expression of-1 is not less than SAG41/CT34 is not less than 0, the change of the direction of the light entering the imaging lens 10 can be slowed down through the reasonable layout of the optical structure, the intensity of the light is favorably reduced, the sensitivity of the change of the system performance is reduced, and the yield of the fourth lens 4 is improved. Preferably, the imaging lens 10 satisfies the conditional expression: -0.374 ≦ SAG41/CT34 ≦ -0.219.

In some embodiments, the imaging lens 10 further satisfies the following conditional expressions: TL/ImgH is more than or equal to 2 and less than or equal to 5; wherein TL is a distance from the object-side surface S1 of the first lens element 1 to the image plane on the optical axis OO'. That is, the division of TL by IMGH may be any value within the interval [2,5], for example, the value may be 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

When the imaging lens 10 satisfies the conditional expression 2 < TL/IMGH < 5 >, the miniaturization of the camera lens group is facilitated. Preferably, the imaging lens 10 satisfies the conditional expression: TL/ImgH is not less than 2.971 and not more than 4.806.

In some embodiments, the prism 8, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 are made of plastic or glass.

The cost of the plastic lens is low, which is beneficial to reducing the cost of the imaging lens 10; the glass lens is not easy to expand with heat or contract with cold due to the change of the environmental temperature, so that the imaging quality of the imaging lens 10 is relatively stable.

In some embodiments, at least one surface of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 is aspheric. The aspherical surface has a surface shape determined by the following formula:

wherein Z is the longitudinal distance between any point on the aspheric surface and the surface vertex, r is the distance between any point on the aspheric surface and the optical axis, c is the vertex curvature (the reciprocal of the curvature radius), k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.

Thus, the imaging lens 10 can effectively reduce the total length of the imaging lens 10 through the curvature radius and the aspheric surface coefficient of each lens surface, and can effectively correct the aberration and improve the imaging quality.

In order to embody the solution of the present application more specifically, the following shows the structures and parameters of the imaging lens 10 of seven embodiments.

First embodiment

Referring to fig. 1, the imaging lens assembly 10 of the first embodiment includes, in order from an object side to an image side along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9.

The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a concave image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with positive refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both object-side surface S2 and image-side surface F2 being aspheric. The third lens element 3 with negative refractive power has a convex object-side surface S3 at the paraxial region OO ', a concave image-side surface F3 at the paraxial region OO', and both the object-side surface S3 and the image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a concave object-side surface S4 at the paraxial region OO ', a convex image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with negative refractive power has a convex object-side surface S5 at the paraxial region OO ', a concave image-side surface F5 at the paraxial region OO', and both the object-side surface S5 and the image-side surface F5 being aspheric. The sixth lens element 6 with positive refractive power has a convex object-side surface S6 at the paraxial region OO ', a concave image-side surface F6 at the paraxial region OO', and both object-side surface S6 and image-side surface F6 being aspheric. The seventh lens element 7 with negative refractive power has a concave object-side surface S7 at the paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both the object-side surface S7 and the image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 8.36mm, the f-number FNO of the imaging lens 10 is 2.8, and the field angle FOV of the imaging lens 10 is 36.68 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 1

The surface numbers of the surfaces in table 1 are sequentially arranged from the object side to the image side, and are also the same in other embodiments below, which are not repeated.

Table 2 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 1, which are derived from the above-mentioned aspherical surface formula (10):

TABLE 2

Fig. 2 (a) is a Longitudinal Spherical Aberration diagram (Longitudinal Spherical Aberration) of the first embodiment, which shows the convergent focus deviation of light rays with different wavelengths after passing through the imaging lens 10. The ordinate of the diagram represents the Normalized Pupil coordinate (Normalized Pupil Coordinator) from the Pupil center to the Pupil edge, and the abscissa of the diagram represents the distance (in mm) of the imaging plane to the intersection of the ray with the optical axis OO'. The wavelengths of the light rays adopted in fig. 2 (a) are 470.000nm, 510.000nm, 587.56nm, 610.000nm and 650.000nm respectively, and after the five kinds of light rays are imaged by the imaging lens 10, the focus offset of different fields of view is within the range of +/-0.1 mm. It can be known from the longitudinal spherical aberration diagram of the first embodiment that the convergent focus deviation degrees of the light rays with different wavelengths in the first embodiment tend to be consistent, so that the diffuse speckles or the color halos in the imaging picture are effectively suppressed, that is, the spherical aberration is small, and the imaging quality is good.

Fig. 2 (b) is a Field curvature diagram (volumetric Field Curves) of the imaging lens 10 according to the first embodiment, in which the S curve represents sagittal Field curvature at 587.56nm, the T curve represents meridional Field curvature at 587.56nm, and the focal shifts of the sagittal image plane and the meridional image plane are both within ± 0.025 mm. As can be seen from fig. 2 (b), the curvature of field of the imaging lens 10 according to the first embodiment is small, the curvature of field and astigmatism of each field (particularly, the peripheral field) are well corrected, and the center and the periphery of the field have sharp images.

Fig. 2 (c) is a Distortion diagram (Distortion) of the imaging lens 10 according to the first embodiment, which shows that the Distortion ratio of the light with a wavelength of 587.56nm is within a range of ± 5.0% after passing through the imaging lens 10. As can be seen from fig. 2 (c), the image distortion caused by the main beam is small, and the imaging quality of the imaging lens 10 is excellent.

Second embodiment

Referring to fig. 3, the imaging lens assembly 10 of the second embodiment includes, in order along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a convex image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with positive refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both object-side surface S2 and image-side surface F2 being aspheric. The third lens element 3 with negative refractive power has a concave object-side surface S3 at the paraxial region OO ', a convex image-side surface F3 at the paraxial region OO', and both the object-side surface S3 and the image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a concave object-side surface S4 at the paraxial region OO ', a concave image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with positive refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with negative refractive power has a convex object-side surface S6 at the paraxial region OO ', a concave image-side surface F6 at the paraxial region OO', and both the object-side surface S6 and the image-side surface F6 being aspheric. The seventh lens element 7 with positive refractive power has a concave object-side surface S7 at a paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both object-side surface S7 and image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 13.23mm, the f-number FNO of the imaging lens 10 is 2.12, and the field angle FOV of the imaging lens 10 is 26.87 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 3

Table 4 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 for the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 3, which are derived from the above aspheric surface formula (10):

TABLE 4

As can be seen from the aberration diagram in fig. 4, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

Third embodiment

Referring to fig. 5, the imaging lens assembly 10 of the third embodiment includes, in order along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a convex image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with negative refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both the object-side surface S2 and the image-side surface F2 being aspheric. The third lens element 3 with negative refractive power has a convex object-side surface S3 at the paraxial region OO ', a concave image-side surface F3 at the paraxial region OO', and both the object-side surface S3 and the image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a concave object-side surface S4 at the paraxial region OO ', a concave image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with positive refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with positive refractive power has a concave object-side surface S6 at a paraxial region OO ', a convex image-side surface F6 at the paraxial region OO', and both object-side surface S6 and image-side surface F6 being aspheric. The seventh lens element 7 with negative refractive power has a concave object-side surface S7 at the paraxial region OO ', a concave image-side surface F7 at the paraxial region OO', and both the object-side surface S7 and the image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 11.69mm, the f-number FNO of the imaging lens 10 is 2.14, and the field angle FOV of the imaging lens 10 is 33.76 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 5

Table 6 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 5, which are derived from the above-mentioned aspherical surface formula (10):

TABLE 6

As can be seen from the aberration diagram in fig. 6, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

Fourth embodiment

Referring to fig. 7, the imaging lens assembly 10 of the first embodiment includes, in order from an object side to an image side along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a convex image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with negative refractive power has a concave object-side surface S2 at the paraxial region OO ', a convex image-side surface F2 at the paraxial region OO', and both the object-side surface S2 and the image-side surface F2 being aspheric. The third lens element 3 with positive refractive power has a concave object-side surface S3 at a paraxial region OO ', a convex image-side surface F3 at the paraxial region OO', and both object-side surface S3 and image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a convex object-side surface S4 at the paraxial region OO ', a concave image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with positive refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with negative refractive power has a concave object-side surface S6 at the paraxial region OO ', a concave image-side surface F6 at the paraxial region OO', and both the object-side surface S6 and the image-side surface F6 being aspheric. The seventh lens element 7 with positive refractive power has a concave object-side surface S7 at a paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both object-side surface S7 and image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 11.00mm, the f-number FNO of the imaging lens 10 is 1.96, and the field angle FOV of the imaging lens 10 is 26.21 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 7

Table 8 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 7, which are derived from the above aspheric surface formula (10):

TABLE 8

As can be seen from the aberration diagram in fig. 8, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

Fifth embodiment

Referring to fig. 9, the imaging lens assembly 10 of the fifth embodiment includes, in order along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a convex image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with negative refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both the object-side surface S2 and the image-side surface F2 being aspheric. The third lens element 3 with positive refractive power has a convex object-side surface S3 at the paraxial region OO ', a concave image-side surface F3 at the paraxial region OO', and both object-side surface S3 and image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a concave object-side surface S4 at the paraxial region OO ', a concave image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with positive refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with negative refractive power has a concave object-side surface S6 at the paraxial region OO ', a convex image-side surface F6 at the paraxial region OO', and both the object-side surface S6 and the image-side surface F6 being aspheric. The seventh lens element 7 with positive refractive power has a concave object-side surface S7 at a paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both object-side surface S7 and image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 18.80mm, the f-number FNO of the imaging lens 10 is 2.35, and the field angle FOV of the imaging lens 10 is 21.32 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 9

Table 10 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 9, which are derived from the above aspheric surface formula (10):

watch 10

As can be seen from the aberration diagram in fig. 10, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

Sixth embodiment

Referring to fig. 11, the imaging lens assembly 10 of the sixth embodiment includes, in order along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a concave image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with negative refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both the object-side surface S2 and the image-side surface F2 being aspheric. The third lens element 3 with negative refractive power has a convex object-side surface S3 at the paraxial region OO ', a concave image-side surface F3 at the paraxial region OO', and both the object-side surface S3 and the image-side surface F3 being aspheric. The fourth lens element 4 with positive refractive power has a concave object-side surface S4 at the paraxial region OO ', a convex image-side surface F4 at the paraxial region OO', and both object-side surface S4 and image-side surface F4 being aspheric. The fifth lens element 5 with negative refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with positive refractive power has a convex object-side surface S6 at the paraxial region OO ', a concave image-side surface F6 at the paraxial region OO', and both object-side surface S6 and image-side surface F6 being aspheric. The seventh lens element 7 with positive refractive power has a convex object-side surface S7 at a paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both object-side surface S7 and image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 8.50mm, the f-number FNO of the imaging lens 10 is 2.39, and the field angle FOV of the imaging lens 10 is 42.92 degrees. The imaging lens 10 satisfies the conditions of the following table:

TABLE 11

Table 12 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 11, which are derived from the above-mentioned aspherical surface formula (10):

TABLE 12

As can be seen from the aberration diagrams in fig. 12, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

Seventh embodiment

Referring to fig. 13, the imaging lens assembly 10 of the seventh embodiment includes, in order along an optical axis, a prism 8, a first lens element 1, a second lens element 2, a third lens element 3, a fourth lens element 4, a fifth lens element 5, a sixth lens element 6, a seventh lens element 7, and an infrared filter 9. The prism 8 is an isosceles right triangular prism for changing the propagation direction of the light so that the light incident on the prism 8 perpendicular to the optical axis is emitted toward the first lens 1 parallel to the optical axis.

The first lens element 1 with positive refractive power has a convex object-side surface S1 at a paraxial region OO ', a convex image-side surface F1 at the paraxial region OO', and both object-side surface S1 and image-side surface F1 being aspheric. The second lens element 2 with negative refractive power has a convex object-side surface S2 at the paraxial region OO ', a concave image-side surface F2 at the paraxial region OO', and both the object-side surface S2 and the image-side surface F2 being aspheric. The third lens element 3 with negative refractive power has a convex object-side surface S3 at the paraxial region OO ', a concave image-side surface F3 at the paraxial region OO', and both the object-side surface S3 and the image-side surface F3 being aspheric. The fourth lens element 4 with negative refractive power has a convex object-side surface S4 at the paraxial region OO ', a concave image-side surface F4 at the paraxial region OO', and both the object-side surface S4 and the image-side surface F4 being aspheric. The fifth lens element 5 with negative refractive power has a concave object-side surface S5 at a paraxial region OO ', a convex image-side surface F5 at the paraxial region OO', and both object-side surface S5 and image-side surface F5 being aspheric. The sixth lens element 6 with negative refractive power has a concave object-side surface S6 at the paraxial region OO ', a convex image-side surface F6 at the paraxial region OO', and both the object-side surface S6 and the image-side surface F6 being aspheric. The seventh lens element 7 with positive refractive power has a convex object-side surface S7 at a paraxial region OO ', a convex image-side surface F7 at the paraxial region OO', and both object-side surface S7 and image-side surface F7 being aspheric.

The infrared filter 9 is made of glass, is disposed between the seventh lens element 7 and the image plane, and does not affect the focal length of the imaging lens 10. The effective focal length f of the imaging lens 10 is 17.70mm, the f-number FNO of the imaging lens 10 is 2.29, and the field angle FOV of the imaging lens 10 is 21.39 degrees. The imaging lens 10 satisfies the conditions of the following table:

watch 13

Table 14 shows the conic coefficients K and higher order correction coefficients a4, a6, A8, a10, a12, a14, a16, a18, a20 of the surface numbers 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 in table 13, which are derived from the above equation (10) for the aspherical surface:

TABLE 14

As can be seen from the aberration diagrams in fig. 14, the longitudinal spherical aberration, curvature of field, and distortion of the imaging lens 10 are well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

The seven embodiments above, summarized the following characteristics:

watch 15

TABLE 16

The image capturing module of the embodiment of the present invention includes the imaging lens 10 and the electronic photosensitive element of any one of the above embodiments. The electron-sensitive element is disposed on the image side of the imaging lens 10, and optionally, the electron-sensitive element may be a Complementary Metal Oxide Semiconductor (CMOS) image sensor or a Charge-coupled Device (CCD) image sensor. The utility model discloses get for instance the module and dispose through reasonable lens for imaging lens 10 not only has higher imaging quality, can also realize imaging lens 10's ultra-thinness and lightweight.

The electronic device comprises a shell and the image capturing module of the embodiment, wherein the image capturing module is installed in the shell and exposed from the shell to acquire an image. The utility model discloses embodiment's electron device is through reasonable lens configuration for imaging lens 10 not only has higher imaging quality, can also realize imaging lens 10's ultra-thinness and lightweight. And the housing has a protective function for the imaging lens 10.

The electronic device according to the embodiment of the present invention includes, but is not limited to, a miniaturized smart phone, a mobile phone, a Personal Digital Assistant (PDA), a game machine, an information terminal device such as a PC, a home appliance having a camera function, and the like.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. An imaging lens, comprising in order from an object side to an image side along an optical axis:

a prism;

a first lens element with refractive power having a convex object-side surface at paraxial region;

a second lens element with refractive power;

a third lens element with refractive power;

a fourth lens element with refractive power;

a fifth lens element with refractive power;

a sixth lens element with refractive power;

a seventh lens element with refractive power;

the imaging lens satisfies the conditional expression:

4mm≤f*ImgH/f1≤8mm；

wherein f is an effective focal length of the imaging lens, ImgH is a half of an image height corresponding to a maximum field angle of the imaging lens, and f1 is an effective focal length of the first lens.

2. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

1≤TL/EPD≤3；

wherein TL is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the imaging lens, and EPD is an entrance pupil diameter of the imaging lens.

3. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

0≤EPD/f≤1；

and the EPD is the diameter of the entrance pupil of the imaging lens.

4. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

1mm^-1≤MVd/f≤6mm^-1；

wherein MVd is an average value of abbe numbers of the first lens to the seventh lens.

5. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

1deg/mm≤FOV/f≤6deg/mm；

wherein the FOV is the maximum field angle of the imaging lens.

6. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

0mm^-1≤ET1/(CT1*f)≤0.5mm^-1；

wherein ET1 is a thickness of a maximum effective radius edge of the first lens, and CT1 is a distance on the optical axis from an object-side surface of the first lens to an image-side surface of the first lens.

7. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

0mm^-1≤ET7/(CT7*f)≤1mm^-1；

wherein ET7 is a thickness of a maximum effective radius edge of the seventh lens, and CT7 is a distance on the optical axis from an object-side surface of the seventh lens to an image-side surface of the seventh lens.

8. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

0≤SAG32/CT34≤1；

SAG32 is the distance from the intersection point of the image side surface of the third lens and the optical axis to the edge of the optically effective area of the image side surface of the third lens in the optical axis direction, and CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens in the optical axis direction.

9. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

-1≤SAG41/CT34≤0；

SAG41 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the edge of the optically effective area of the object side surface of the fourth lens in the optical axis direction, and CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens in the optical axis direction.

10. The imaging lens according to claim 1, characterized in that the imaging lens satisfies the following conditional expression:

2≤TL/ImgH≤5；

wherein TL is a distance on the optical axis from the object-side surface of the first lens element to the image plane.

11. An image capturing module, comprising:

an imaging lens according to any one of claims 1 to 10; and

and the electronic photosensitive element is arranged on the image side of the imaging lens.

12. An electronic device, comprising:

a housing; and

the image capture module of claim 11, mounted on the housing.

Images