CN119179166A - Image pickup lens - Google Patents

Abstract

The invention provides an imaging lens which comprises a lens barrel, a lens group assembled in the lens barrel, and a plurality of shading elements, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are sequentially arranged from an object side to an image side, the first shading element, the second shading element and the third shading element meet the condition that CP1 = CP2 = CP3, the imaging lens meets the condition that F1>6mm,2< fno (EP 01/CT 1) <4, wherein F1 is an effective focal length of the first lens, CT1 is a central thickness of the first lens, EP01 is an axial distance from the first shading element to an object side end face of the lens barrel, fno is an F number of the imaging lens, CP1 is a maximum thickness of the first shading element, CP2 is a maximum thickness of the second shading element, and CP3 is a maximum thickness of the third shading element. The invention solves the problem that the front end lens of the imaging lens in the prior art is easy to generate stray light.

Description

Image pickup lens

The invention is a divisional application of patent application with the application number 2023107486946 and the name of 'photographic lens' of 2023, 6 and 21 days.

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to an imaging lens.

Background

Along with the progress of science and technology, all need assemble the camera lens in a great deal of electronic equipment such as security protection surveillance camera machine, cell-phone, on-vehicle formation of image to satisfy the function of photographic, in order to match higher requirement of making a video recording, the higher camera lens of formation of image quality needs to be designed urgently, and seven formula camera lenses pass through the combination of multi-disc lens, can correct each other and compensate formation of image, promotes the ability of gathering light, strengthens camera lens resolution and contrast, can greatly promote the quality of formation of image. However, in the seven-lens type imaging lens, the front lens of the imaging lens easily deflects light onto the lens barrel to generate stray light, so that stray light with concentrated energy appears at the head of the imaging lens.

That is, the imaging lens in the prior art has a problem that stray light is easily generated in the front lens.

Disclosure of Invention

The invention mainly aims to provide an imaging lens, which solves the problem that stray light is easy to generate in a front end lens of the imaging lens in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an image pickup lens including a barrel; a lens group assembled in the lens barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the shading elements at least comprise first shading elements to seventh shading elements; the first shading element is positioned between the first lens and the second lens and is contacted with the image side surface part of the first lens, the second shading element is positioned between the second lens and the third lens and is contacted with the image side surface part of the second lens, the third shading element is positioned between the third lens and the fourth lens and is contacted with the image side surface part of the third lens, the fourth shading element is positioned between the fourth lens and the fifth lens and is contacted with the image side surface part of the fourth lens, the fifth shading element is positioned between the fifth lens and the sixth lens and is contacted with the image side surface part of the fifth lens, the sixth shading element is positioned between the sixth lens and the seventh lens and is contacted with the image side surface part of the sixth lens, the seventh shading element is positioned at the image side of the seventh lens and is contacted with the image side surface part of the seventh lens, wherein the first shading element, the second shading element and the third shading element are contacted with the image side surface part of the third lens, the first shading element and the fourth shading element are contacted with the image side surface part of the fourth lens, the fourth shading element is contacted with the image side surface part of the fourth lens, the fourth shading element is contacted with the image side part, the fourth lens, the fourth shading element is contacted with the image side 1 = CP2, the fourth lens, the lens is contacted with the image side lens, the lens is contacted with the lens, the lens 4, the lens 4, the 4 lens 4 the 4 lens 4, CP3 is the maximum thickness of the third shading element.

According to another aspect of the present invention, there is provided an imaging lens including a barrel; a lens group assembled in the lens barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the shading elements at least comprise first shading elements to seventh shading elements; the first light shielding element is positioned between the first lens and the second lens and is contacted with the image side surface part of the first lens, the second light shielding element is positioned between the second lens and the third lens and is contacted with the image side surface part of the second lens, the third light shielding element is positioned between the third lens and the fourth lens and is contacted with the image side surface part of the third lens, the fourth light shielding element is positioned between the fourth lens and the fifth lens and is contacted with the image side surface part of the fourth lens, the fifth light shielding element is positioned between the fifth lens and the sixth lens and is contacted with the image side surface part of the fifth lens, the sixth light shielding element is positioned between the sixth lens and the seventh lens and is contacted with the image side surface part of the sixth lens, the seventh light shielding element is positioned on the image side of the seventh lens and is contacted with the image side surface part of the seventh lens, wherein the first light shielding element, the second light shielding element and the third light shielding element are contacted with the image side surface part of the seventh lens, the lens satisfies that CP1 = CP2, the lens satisfies-12 (f 1+ f 2)/(CP 1+ EP12+ EP 23), the lens satisfies that f1+ CP2+ EP 2+ 2, f 5, the second light shielding element is the maximum focal length of the first light shielding element is the second lens, the second focal length of the second lens is the focal length of the second lens, the second lens is the focal length of the second lens, the focal length of the second lens is the focal length of the focal length and the focal length, and focal length, and focal length, focal length, and focal length, focal length and focal length focal, EP23 is the on-axis distance from the image side of the second light shielding element to the object side of the third light shielding element. Because the object side surface of the first lens and the image side surface of the first lens easily reflect light to the inner wall of the lens barrel to generate stray light, meanwhile, the lens barrel is filled with flaws, the hole is not sharp, and needle-shaped, flocculent and feather-shaped stray light are caused by shining and the like, so that the imaging quality of the imaging lens is poor. By controlling parameters such as the first lens, the second lens, the first shading element, the second shading element and the third shading element, the deflection angle of light is controlled, stray light can be effectively restrained, meanwhile, the interval between the shading elements is controlled, the aberration of the imaging lens can be adjusted in the assembling process, meanwhile, the precision of the imaging lens is improved, the shading elements can effectively block stray light, stray light is further reduced, and the imaging quality is improved.

According to another aspect of the present invention, there is provided an imaging lens including a barrel; a lens group assembled in the lens barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the shading elements at least comprise first shading elements to seventh shading elements; the first shading element is positioned between the first lens and the second lens and is contacted with the image side surface part of the first lens, the second shading element is positioned between the second lens and the third lens and is contacted with the image side surface part of the second lens, the third shading element is positioned between the third lens and the fourth lens and is contacted with the image side surface part of the third lens, the fourth shading element is positioned between the fourth lens and the fifth lens and is contacted with the image side surface part of the fourth lens, the fifth shading element is positioned between the fifth lens and the sixth lens and is contacted with the image side surface part of the fifth lens, the sixth shading element is positioned between the sixth lens and the seventh lens and is contacted with the image side surface part of the sixth lens, the seventh shading element is positioned at the image side of the seventh lens and is contacted with the image side surface part of the seventh lens, the first shading element, the second shading element and the third shading element are contacted with the image side surface part of the third lens, the fourth shading element is positioned between the fourth lens and the fourth shading element, the fourth shading element is contacted with the image side surface part of the third lens, the fourth shading element is contacted with the image side surface part of the fourth shading element, the fourth shading element is contacted with the image side surface part, the image side surface, the fifth shading element is contacted with the image side surface, the fifth shading element is, and the fifth shading element is contacted with the image side, and the fifth lens, and the fifth shading element, and the lens. The distance between the lenses is controlled by controlling parameters such as the second lens, the third lens, the fourth lens, the first shading element, the second shading element and the third shading element, so that the size of an air gap between the lenses is controlled, the stability of the gap between the second lens and the third lens and between the third lens and the fourth lens is ensured, the sensitivity of air gap change in the assembly process is reduced, the influence of the air gap on the performance parameters of the photographic lens is reduced, and meanwhile, the stable assembly bearing between the lenses is improved.

Further, the imaging lens satisfies the condition that-12 < - (f1+f2)/(CP 1+ep12+cp2+ep 23) < -5, wherein f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, CP1 is a maximum thickness of the first light shielding element, CP2 is a maximum thickness of the second light shielding element, EP12 is an on-axis distance from an image side surface of the first light shielding element to an object side surface of the second light shielding element, and EP23 is an on-axis distance from an image side surface of the second light shielding element to an object side surface of the third light shielding element.

Further, the imaging lens satisfies 35< T23/CP2+T34/CP3<45, wherein CP2 is the maximum thickness of the second light shielding element, CP3 is the maximum thickness of the third light shielding element, T23 is the axial distance from the image side surface of the second lens to the object side surface of the third lens, and T34 is the axial distance from the image side surface of the third lens to the object side surface of the fourth lens.

Further, the imaging lens satisfies 1< EP34/CT 4. Times. N4<4, wherein EP34 is an on-axis distance from an image side surface of the third light shielding element to an object side surface of the fourth light shielding element, CT4 is a center thickness of the fourth lens, and N4 is a refractive index of the fourth lens.

Further, the imaging lens satisfies 3< f 45/(EP 45+cp5+ep 56) <7, wherein f45 is a combined focal length of the fourth lens element and the fifth lens element, EP45 is an on-axis distance from an image side surface of the fourth light shielding element to an object side surface of the fifth light shielding element, EP56 is an on-axis distance from the image side surface of the fifth light shielding element to the object side surface of the sixth light shielding element, and CP5 is a maximum thickness of the fifth light shielding element.

Further, the imaging lens satisfies 10< f6/EP56-f7/EP67<25, wherein f6 is the effective focal length of the sixth lens element, f7 is the effective focal length of the seventh lens element, EP56 is the on-axis distance from the image side surface of the fifth light shielding element to the object side surface of the sixth light shielding element, and EP67 is the on-axis distance from the image side surface of the sixth light shielding element to the object side surface of the seventh light shielding element.

Further, the imaging lens satisfies-20 < f7/EP 67N 7< -5 >, wherein f7 is an effective focal length of the seventh lens element, EP67 is an on-axis distance from an image side surface of the sixth light shielding element to an object side surface of the seventh light shielding element, and N7 is a refractive index of the seventh lens element.

Further, the imaging lens satisfies 5<f/(CP5+CP6) <15, wherein f is a focal length of the imaging lens, CP5 is a maximum thickness of the fifth light shielding element, and CP6 is a maximum thickness of the sixth light shielding element.

Further, the lens group further comprises a fourth auxiliary shading element, and the fourth auxiliary shading element is positioned between the fourth shading element and the fifth lens.

Further, the lens group further comprises a fifth auxiliary shading element, and the fifth auxiliary shading element is located between the fifth shading element and the sixth lens.

Further, the lens group further comprises a sixth auxiliary shading element, and the sixth auxiliary shading element is located between the sixth shading element and the seventh lens.

By applying the technical scheme of the invention, the imaging lens comprises a lens barrel and a lens group assembled in the lens barrel, wherein the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side; the lens group further comprises a plurality of shading elements, wherein the plurality of shading elements at least comprise a first shading element, a second shading element, a third shading element, a fifth shading element, a sixth shading element, a seventh shading element and a seventh shading element, the first shading element is arranged between the first lens and the second lens and is contacted with an image side surface part of the first lens, the second shading element is arranged between the second lens and the third lens and is contacted with an image side surface part of the second lens, the third shading element is arranged between the third lens and the fourth lens and is contacted with an image side surface part of the third lens, the fourth shading element is arranged between the fourth lens and the fifth lens and is contacted with an image side surface part of the fourth lens, the fifth shading element is arranged between the fifth lens and the sixth lens and is contacted with an image side surface part of the fifth lens, the sixth shading element is arranged between the sixth lens and the seventh lens and is contacted with an image side surface part of the sixth lens, and the seventh shading element is arranged at the image side of the seventh lens and is contacted with an image side surface part of the seventh lens;

the first shading element, the second shading element and the third shading element meet the following conditions that CP1=CP2=CP3;

the imaging lens satisfies f1>6mm,2< fno (EP 01/CT 1) <4;

Wherein F1 is an effective focal length of the first lens, CT1 is a center thickness of the first lens, EP01 is an on-axis distance from the first light shielding element to an object side end surface of the lens barrel, fno is an F number of the imaging lens, CP1 is a maximum thickness of the first light shielding element, CP2 is a maximum thickness of the second light shielding element, and CP3 is a maximum thickness of the third light shielding element.

Because the object side surface of the first lens and the image side surface of the first lens easily reflect light to the inner wall of the lens barrel to generate stray light, meanwhile, the lens barrel is filled with flaws, the hole is not sharp, and needle-shaped, flocculent and feather-shaped stray light are caused by shining and the like, so that the imaging quality of the imaging lens is poor. Through controlling parameters such as F number of first lens, first shading element, second shading element, third shading element, camera lens, effectively reduce the light quantity that gets into the camera lens, can show the production that reduces the parasitic light, first shading element, second shading element and third shading element simultaneously, can also shelter from the stray light, effectively reduce the appearance of parasitic light, control focal length and the central thickness of first lens, be favorable to reducing the refracting angle of light, further reduce the production of complicated parasitic light. The control of the parameters is beneficial to reducing the stray light generated by the object side surface of the first lens and the image side surface of the first lens reflected to the inner wall surface of the lens barrel, so as to improve the stray light with concentrated energy appearing at the head of the imaging lens.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a parasitic simulation diagram of a prior art camera lens;

FIG. 2 shows a parasitic simulation of an imaging lens in accordance with an alternative embodiment of the present invention;

FIG. 3 shows a partial parametric schematic of an alternative embodiment of the present invention;

fig. 4 to 6 are schematic diagrams showing the configuration of an imaging lens in a first state, a second state, and a third state according to an example of the present invention;

Fig. 7 to 10 show on-axis chromatic aberration curves, magnification chromatic aberration curves, astigmatism curves, and distortion curves of example one of the present invention;

Fig. 11 to 13 are schematic diagrams showing the configuration of an imaging lens in the first state, the second state, and the third state according to the second example of the present invention;

Fig. 14 to 17 show on-axis chromatic aberration curves, magnification chromatic aberration curves, astigmatism curves, and distortion curves of example two of the present invention;

fig. 18 to 20 are schematic diagrams showing the configuration of an imaging lens in the first state, the second state, and the third state of example three of the present invention;

Fig. 21 to 24 show an on-axis chromatic aberration curve, a chromatic aberration of magnification curve, an astigmatism curve, and a distortion curve of example three of the present invention;

fig. 25 shows a ray pattern of an imaging lens according to an alternative embodiment of the present invention.

Wherein the above figures include the following reference numerals:

E1, a first lens, P1, a first spacer, E2, a second lens, P2, a second spacer, E3, a third lens, P3, a third spacer, E4, a fourth lens, P4, a fourth spacer, P4b, a fourth auxiliary spacer, E5, a fifth lens, P5, a fifth spacer, P5b, a fifth auxiliary spacer, E6, a sixth lens, P6, a sixth spacer, P6b, a sixth auxiliary spacer, E7, a seventh lens, P7, a seventh spacer.

Detailed Description

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

It is noted that all 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 unless otherwise indicated.

In the present invention, unless otherwise indicated, the use of orientation terms such as "upper, lower, top, bottom" are generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, vertical or gravitational direction, and likewise, for ease of understanding and description, "inner, outer" refer to inner, outer relative to the profile of the component itself, but such orientation terms are not intended to limit the invention.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a 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. Specifically, the spherical or aspherical shape shown in the drawings is 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 figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a 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, and if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). The object side surface is determined to be convex when the R value is positive, and the image side surface is determined to be concave when the R value is negative, and the image side surface is determined to be concave when the R value is positive, and the image side surface is determined to be convex when the R value is negative.

In the present application, the object side surface means a light incident side surface, and the image side surface means a light emitting side surface.

The invention provides an imaging lens, which aims to solve the problem that stray light is easy to generate in a front end lens of the imaging lens in the prior art.

Example 1

As shown in fig. 2 to 25, the imaging lens includes a barrel and a lens group fitted in the barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the plurality of shading elements at least comprise a first shading element, a second shading element, a third shading element, a fifth shading element, a sixth shading element, a seventh shading element and a seventh shading element, the first shading element is arranged between the first lens and the second lens and is contacted with an image side surface part of the first lens, the second shading element is arranged between the second lens and the third lens and is contacted with an image side surface part of the second lens, the third shading element is arranged between the third lens and the fourth lens and is contacted with an image side surface part of the third lens, the fourth shading element is arranged between the fourth lens and the fifth lens and is contacted with an image side surface part of the fourth lens, the fifth shading element is arranged between the fifth lens and the sixth lens and is contacted with an image side surface part of the fifth lens, the sixth shading element is arranged between the sixth lens and the seventh lens and is contacted with an image side surface part of the sixth lens, and the seventh shading element is arranged at the image side of the seventh lens and is contacted with an image side surface part of the seventh lens;

the first shading element, the second shading element and the third shading element meet the following conditions that CP1=CP2=CP3;

the imaging lens satisfies f1>6mm,2< fno (EP 01/CT 1) <4;

Wherein F1 is an effective focal length of the first lens, CT1 is a center thickness of the first lens, EP01 is an on-axis distance from the first light shielding element to an object side end surface of the lens barrel, fno is an F number of the imaging lens, CP1 is a maximum thickness of the first light shielding element, CP2 is a maximum thickness of the second light shielding element, and CP3 is a maximum thickness of the third light shielding element.

Because the object side surface of the first lens and the image side surface of the first lens easily reflect light to the inner wall of the lens barrel to generate stray light, meanwhile, the lens barrel is filled with flaws, the hole is not sharp, and needle-shaped, flocculent and feather-shaped stray light are caused by shining and the like, so that the imaging quality of the imaging lens is poor. Through controlling parameters such as F number of first lens, first shading element, second shading element, third shading element, camera lens, effectively reduce the light quantity that gets into the camera lens, can show the production that reduces the parasitic light, first shading element, second shading element and third shading element simultaneously, can also shelter from the stray light, effectively reduce the appearance of parasitic light, control focal length and the central thickness of first lens, be favorable to reducing the refracting angle of light, further reduce the production of complicated parasitic light. The control of the parameters is beneficial to reducing the stray light generated by the object side surface of the first lens and the image side surface of the first lens reflected to the inner wall surface of the lens barrel, so as to improve the stray light with concentrated energy appearing at the head of the imaging lens. As can be seen from a comparison of fig. 1 and 2, the imaging lens in the prior art has more stray light, and the stray light in the imaging lens in the present application is significantly reduced.

Preferably 2.4< fno (EP 01/CT 1) <3.5.

In the embodiment, the imaging lens satisfies the condition that-12 < - (f1+f2)/(CP 1+ep12+cp2+ep 23) < -5, wherein f1 is the effective focal length of the first lens element, f2 is the effective focal length of the second lens element, CP1 is the maximum thickness of the first light shielding element, CP2 is the maximum thickness of the second light shielding element, EP12 is the axial distance from the image side surface of the first light shielding element to the object side surface of the second light shielding element, and EP23 is the axial distance from the image side surface of the second light shielding element to the object side surface of the third light shielding element. By controlling (f1+f2)/(CP 1+ep12+cp2+ep 23) within a reasonable range, it is advantageous to adjust the aberration of the imaging lens in the assembly process, and improve the accuracy of the imaging lens. The effective focal length of the first lens and the effective focal length of the second lens are limited, the deflection angle of light rays can be controlled, stray light can be effectively restrained, meanwhile, the distance between two adjacent shading elements is controlled, the shading elements can effectively block stray light, stray light is further reduced, and imaging quality is improved. Preferably, -11.5< (f1+f2)/(CP 1+ EP12+ CP2+ EP 23) < -5.5.

In the embodiment, the imaging lens satisfies 35< T23/CP2+T34/CP3<45, wherein CP2 is the maximum thickness of the second light shielding element, CP3 is the maximum thickness of the third light shielding element, T23 is the axial distance from the image side surface of the second lens to the object side surface of the third lens, and T34 is the axial distance from the image side surface of the third lens to the object side surface of the fourth lens. The T23/CP2+T34/CP3 is controlled in a reasonable range, so that the assembly bearing between the lenses is ensured to be more stable, the distance between the lenses is controlled, the size of the air gap between the lenses is further controlled, and the influence of the air gap on the performance parameters of the photographic lens is reduced. Preferably, 36< T23/CP2+T34/CP3<44.

In the embodiment, the imaging lens satisfies 1< EP34/CT 4. N4<4, wherein EP34 is the axial distance from the image side surface of the third light shielding element to the object side surface of the fourth light shielding element, CT4 is the center thickness of the fourth lens, and N4 is the refractive index of the fourth lens. The EP34/CT 4N 4 is controlled in a reasonable range, so that on one hand, the step difference between lenses can be effectively improved, and the stability of assembly is improved. On the other hand, the form of the fourth lens can be ensured, the stability of lens molding is improved, the difficulty and the manufacturing cost of processing and manufacturing are reduced, the air gap between the fourth lens and the front lens and the rear lens is improved, and the influence of the air gap on the performance parameters of the imaging lens is reduced. Preferably 1.1< ep34/CT 4N 4<3.7.

In the present embodiment, the imaging lens satisfies 3< f 45/(EP 45+cp5+ep 56) <7, where f45 is the combined focal length of the fourth lens element and the fifth lens element, EP45 is the on-axis distance from the image side surface of the fourth light shielding element to the object side surface of the fifth light shielding element, EP56 is the on-axis distance from the image side surface of the fifth light shielding element to the object side surface of the sixth light shielding element, and CP5 is the maximum thickness of the fifth light shielding element. The f 45/(EP 45+CP5+EP 56) is controlled within a reasonable range, so that stray light generated by a mechanism part of the lens can be effectively shielded, aberration generated by the fifth lens and the sixth lens can be effectively improved, and the imaging quality of the imaging lens can be improved. Preferably 3.3< f 45/(EP 45+ CP5+ EP 56) <7.

In the embodiment, the imaging lens satisfies the condition that 10< f6/EP56-f7/EP67<25, wherein f6 is the effective focal length of the sixth lens element, f7 is the effective focal length of the seventh lens element, EP56 is the on-axis distance from the image side surface of the fifth light shielding element to the object side surface of the sixth light shielding element, and EP67 is the on-axis distance from the image side surface of the sixth light shielding element to the object side surface of the seventh light shielding element. The 6/EP56-f7/EP67 is controlled in a reasonable range, the refractive index of the lens can be improved, the lens forming is facilitated, the forming difficulty is reduced, the cost is reduced, meanwhile, the assembly step difference between the sixth lens and the seventh lens is improved, the stability of the photographing lens is improved, the assembly yield is improved, the trend of light rays can be controlled, and the stray light is reduced. Preferably 12< f6/EP56-f7/EP67<24.

In the embodiment, the imaging lens satisfies-20 < f7/EP67 < N7< -5 >, wherein f7 is an effective focal length of the seventh lens element, EP67 is an on-axis distance from an image side surface of the sixth light shielding element to an object side surface of the seventh light shielding element, and N7 is a refractive index of the seventh lens element. The f7/EP67 is controlled in a reasonable range, so that the surface bending degree of the seventh lens is improved, imaging distortion is reduced, meanwhile, the processing and forming of the seventh lens are facilitated, the yield is improved, the cost is reduced, meanwhile, the assembly step difference between the sixth lens and the seventh lens can be improved, the assembly stability is enhanced, the assembly yield is improved, and stray light can be reduced. Preferably, -18< f7/EP 67. N7< -5.5.

In this embodiment, the imaging lens satisfies 5<f/(CP5+CP6) <15, where f is the focal length of the imaging lens, CP5 is the maximum thickness of the fifth light shielding element, and CP6 is the maximum thickness of the sixth light shielding element. f/(CP5+CP6) is controlled in a reasonable range, and under the condition of meeting the requirements of application scenes, the assembly stability is further improved, the way of adjusting the aberration of the imaging lens is increased, and the imaging quality of the imaging lens is further improved. Preferably, 5.4< f/(CP 5+ CP 6) <13.

In this embodiment, the lens group further includes a fourth auxiliary light shielding element, and the fourth auxiliary light shielding element is located between the fourth light shielding element and the fifth lens. The arrangement of the fourth auxiliary shading element is beneficial to enhancing the assembly stability between the fourth lens and the fifth lens, transmitting assembly stress, improving internal stray light generated by an optical structure area of the fourth lens and improving the imaging quality of the imaging lens.

In this embodiment, the lens group further includes a fifth auxiliary light shielding element, and the fifth auxiliary light shielding element is located between the fifth light shielding element and the sixth lens. The arrangement of the fifth auxiliary shading element is beneficial to enhancing the assembly stability between the fifth lens and the sixth lens, transmitting assembly stress, improving internal stray light generated by an optical structure area of the fifth lens and improving the imaging quality of the imaging lens.

In this embodiment, the lens group further includes a sixth auxiliary light shielding element, and the sixth auxiliary light shielding element is located between the sixth light shielding element and the seventh lens. The arrangement of the sixth auxiliary shading element is beneficial to enhancing the assembly stability between the sixth lens and the seventh lens, transmitting assembly stress, improving internal stray light generated in an optical structure area of the sixth lens and improving the imaging quality of the imaging lens.

Example two

As shown in fig. 2 to 25, the imaging lens includes a barrel and a lens group fitted in the barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the plurality of shading elements at least comprise a first shading element, a second shading element, a third shading element, a fifth shading element, a sixth shading element, a seventh shading element and a seventh shading element, the first shading element is arranged between the first lens and the second lens and is contacted with an image side surface part of the first lens, the second shading element is arranged between the second lens and the third lens and is contacted with an image side surface part of the second lens, the third shading element is arranged between the third lens and the fourth lens and is contacted with an image side surface part of the third lens, the fourth shading element is arranged between the fourth lens and the fifth lens and is contacted with an image side surface part of the fourth lens, the fifth shading element is arranged between the fifth lens and the sixth lens and is contacted with an image side surface part of the fifth lens, the sixth shading element is arranged between the sixth lens and the seventh lens and is contacted with an image side surface part of the sixth lens, and the seventh shading element is arranged at the image side of the seventh lens and is contacted with an image side surface part of the seventh lens;

the first shading element, the second shading element and the third shading element meet the following conditions that CP1=CP2=CP3;

the imaging lens satisfies that-12 < (f1+f2)/(CP1+EP 12+CP2+EP 23) < -5;

Wherein f1 is an effective focal length of the first lens element, f2 is an effective focal length of the second lens element, CP1 is a maximum thickness of the first light-shielding element, CP2 is a maximum thickness of the second light-shielding element, EP12 is an on-axis distance from an image side surface of the first light-shielding element to an object side surface of the second light-shielding element, EP23 is an on-axis distance from the image side surface of the second light-shielding element to the object side surface of the third light-shielding element, and CP3 is a maximum thickness of the third light-shielding element.

Because the object side surface of the first lens and the image side surface of the first lens easily reflect light to the inner wall of the lens barrel to generate stray light, meanwhile, the lens barrel is filled with flaws, the hole is not sharp, and needle-shaped, flocculent and feather-shaped stray light are caused by shining and the like, so that the imaging quality of the imaging lens is poor. By controlling parameters such as the first lens, the second lens, the first shading element, the second shading element and the third shading element, the deflection angle of light is controlled, stray light can be effectively restrained, meanwhile, the interval between the shading elements is controlled, the aberration of the imaging lens can be adjusted in the assembling process, meanwhile, the precision of the imaging lens is improved, the shading elements can effectively block stray light, stray light is further reduced, and the imaging quality is improved. As can be seen from a comparison of fig. 1 and 2, the imaging lens in the prior art has more stray light, and the stray light in the imaging lens in the present application is significantly reduced.

The imaging lens in the second embodiment also satisfies other relational expressions in the first embodiment, and will not be described in detail here.

Example III

As shown in fig. 2 to 24, the imaging lens includes a barrel and a lens group fitted in the barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the lens group further comprises a plurality of shading elements, wherein the plurality of shading elements at least comprise a first shading element, a second shading element, a third shading element, a fifth shading element, a sixth shading element, a seventh shading element and a seventh shading element, the first shading element is arranged between the first lens and the second lens and is contacted with an image side surface part of the first lens, the second shading element is arranged between the second lens and the third lens and is contacted with an image side surface part of the second lens, the third shading element is arranged between the third lens and the fourth lens and is contacted with an image side surface part of the third lens, the fourth shading element is arranged between the fourth lens and the fifth lens and is contacted with an image side surface part of the fourth lens, the fifth shading element is arranged between the fifth lens and the sixth lens and is contacted with an image side surface part of the fifth lens, the sixth shading element is arranged between the sixth lens and the seventh lens and is contacted with an image side surface part of the sixth lens, and the seventh shading element is arranged at the image side of the seventh lens and is contacted with an image side surface part of the seventh lens;

the first shading element, the second shading element and the third shading element meet the following conditions that CP1=CP2=CP3;

the imaging lens satisfies 35< T23/CP2+T34/CP3<45;

wherein CP2 is the maximum thickness of the second light shielding element, CP3 is the maximum thickness of the third light shielding element, T23 is the axial distance from the image side surface of the second lens element to the object side surface of the third lens element, and T34 is the axial distance from the image side surface of the third lens element to the object side surface of the fourth lens element.

The distance between the lenses is controlled by controlling parameters such as the second lens, the third lens, the fourth lens, the first shading element, the second shading element and the third shading element, so that the size of an air gap between the lenses is controlled, the stability of the gap between the second lens and the third lens and between the third lens and the fourth lens is ensured, the sensitivity of air gap change in the assembly process is reduced, the influence of the air gap on the performance parameters of the photographic lens is reduced, and meanwhile, the stable assembly bearing between the lenses is improved.

The imaging lens in the third embodiment also satisfies other relational expressions in the first embodiment, and will not be described in detail here.

Optionally, the above-mentioned image pickup lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

The imaging lens in the present application may employ a plurality of lenses, for example, seven as described above. Through reasonable distribution of focal power, surface shape, center thickness of each lens, axial distance between each lens and the like, the imaging quality of the imaging lens can be effectively increased, the sensitivity of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones and the like.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspherical lens is characterized in that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens can be varied to achieve the various results and advantages described in the specification without departing from the technical solution claimed in the present application. For example, although the description has been made by taking seven lenses as an example in the embodiment, the imaging lens is not limited to include seven lenses. The imaging lens may also include other numbers of lenses, if desired.

In fig. 4, S1 is an object side surface of the first lens element, S2 is an image side surface of the first lens element, S3 is an object side surface of the second lens element, S4 is an image side surface of the second lens element, S5 is an object side surface of the third lens element, S6 is an image side surface of the third lens element, S7 is an object side surface of the fourth lens element, S8 is an image side surface of the fourth lens element, S9 is an object side surface of the fifth lens element, S10 is an image side surface of the fifth lens element, S11 is an object side surface of the sixth lens element, S12 is an image side surface of the sixth lens element, S13 is an object side surface of the seventh lens element, and S14 is an image side surface of the seventh lens element.

Examples of specific surface types and parameters applicable to the imaging lens of the above embodiment are further described below with reference to the drawings.

Any of the following examples one to three is applicable to all embodiments of the present application.

Example one

As shown in fig. 4 to 10, an imaging lens according to an example one of the present application is described. Fig. 4 shows a schematic configuration of the imaging lens of example one in the first state, fig. 5 shows a schematic configuration of the imaging lens of example one in the second state, and fig. 6 shows a schematic configuration of the imaging lens of example one in the third state.

As shown in fig. 4, the camera lens sequentially comprises a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a third lens element E3, a third spacer P3, a fourth lens element E4, a fourth spacer P4, a fourth auxiliary spacer P4b, a fifth lens element E5, a fifth spacer P5, a sixth lens element E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens element E7 and a seventh spacer P7 from an object side to an image side.

The second state shown in fig. 5 is similar to the first state shown in fig. 4, except that the spacers are slightly different in size.

The third state shown in fig. 6 is not provided with the fourth auxiliary separator P4b in fig. 6, and the remaining separators have slightly different sizes compared to the first state shown in fig. 4.

Table 1 shows a basic structural parameter table of an imaging lens of example one, in which the units of radius of curvature, thickness/distance are each millimeter mm.

TABLE 1

In the first example, the object side surface and the image side surface of a part of the lenses E1 to E7 are aspheric, and the surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

Where x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at the position of h along the optical axis direction, c is the paraxial curvature of the aspheric surface, c=1/R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in table 1, k is a conic coefficient, and Ai is the correction coefficient of the i-th order of the aspheric surface. The cone coefficients and higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors S1-S14 in example one are given in Table 2 below.

TABLE 2

Fig. 7 shows an on-axis chromatic aberration curve of the imaging lens of example one, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the imaging lens. Fig. 8 shows a magnification chromatic aberration curve of the imaging lens of example one, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens. Fig. 9 shows an astigmatism curve of the imaging lens of example one, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 10 shows a distortion curve of the imaging lens of example one, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 7 to 10, the imaging lens provided in example one can achieve good imaging quality.

Example two

As shown in fig. 11 to 17, an imaging lens of example two of the present application is described. Fig. 11 shows a schematic configuration of the image pickup lens of the second example in the first state, fig. 12 shows a schematic configuration of the image pickup lens of the second example in the second state, and fig. 13 shows a schematic configuration of the image pickup lens of the second example in the third state.

As shown in fig. 11, the camera lens sequentially comprises a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a third lens element E3, a third spacer P3, a fourth lens element E4, a fourth spacer P4, a fifth lens element E5, a fifth spacer P5, a fifth auxiliary spacer P5b, a sixth lens element E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens element E7 and a seventh spacer P7 from the object side to the image side.

The second state shown in fig. 12 is similar to the first state shown in fig. 11, except that the spacers are slightly different in size.

The third state shown in fig. 13 is similar to the first state shown in fig. 11, except that the spacers are slightly different in size.

Table 3 shows a basic structural parameter table of an imaging lens of example two, in which the units of radius of curvature, thickness/distance are each millimeter mm.

TABLE 3 Table 3

The cone coefficients and higher order coefficients that can be used for each of the aspherical mirror surfaces S1-S14 in example two are given in Table 4.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-5.8381E-04

9.7851E-03

-4.8413E-02

1.5042E-01

-3.1488E-01

4.5962E-01

-4.7882E-01

S2

-2.5164E-03

-1.0430E-02

7.0822E-02

-2.3344E-01

4.9771E-01

-7.3188E-01

7.6581E-01

S3

-1.2559E-02

1.6813E-02

-5.3323E-02

1.5820E-01

-3.1556E-01

4.3456E-01

-4.2286E-01

S4

-7.2458E-03

-4.2872E-03

5.5757E-02

-2.1558E-01

5.3306E-01

-8.9962E-01

1.0728E+00

S5

5.1550E-04

2.9283E-03

-1.7898E-02

5.0833E-02

-7.9409E-02

4.6617E-02

5.9551E-02

S6

-3.3826E-04

-3.0341E-02

1.6709E-01

-5.9047E-01

1.3925E+00

-2.2963E+00

2.7161E+00

S7

-2.7781E-02

-1.1494E-03

-7.9220E-03

-1.9748E-03

8.8832E-02

-2.8862E-01

5.0158E-01

S8

-2.2287E-02

-4.3191E-03

2.0248E-02

-4.5469E-02

6.4671E-02

-6.3957E-02

4.5539E-02

S9

-2.0217E-02

8.4774E-03

2.2757E-03

-1.0108E-02

1.1368E-02

-7.8614E-03

3.7410E-03

S10

-4.5147E-02

1.1859E-02

3.9675E-03

-1.0251E-02

8.9869E-03

-4.8321E-03

1.7588E-03

S11

-2.4328E-02

7.0264E-03

-2.9509E-03

8.2104E-04

-1.8010E-04

3.4418E-05

-5.3805E-06

S12

2.7693E-03

1.1984E-03

-1.3972E-03

3.1804E-04

-2.8743E-05

-1.7130E-06

1.0911E-06

S13

-8.4305E-02

1.0000E-02

3.6740E-03

-2.3584E-03

6.3239E-04

-1.0236E-04

1.1015E-05

S14

-9.3661E-02

2.4948E-02

-5.8913E-03

1.3242E-03

-2.6980E-04

4.3228E-05

-5.0492E-06

Face number

A18

A20

A22

A24

A26

A28

A30

S1

3.6039E-01

-1.9630E-01

7.6602E-02

-2.0863E-02

3.7637E-03

-4.0394E-04

1.9515E-05

S2

-5.7901E-01

3.1733E-01

-1.2488E-01

3.4396E-02

-6.2949E-03

6.8762E-04

-3.3927E-05

S3

2.9464E-01

-1.4734E-01

5.2346E-02

-1.2867E-02

2.0737E-03

-1.9623E-04

8.2078E-06

S4

-9.1973E-01

5.6928E-01

-2.5230E-01

7.8126E-02

-1.6064E-02

1.9721E-03

-1.0947E-04

S5

-1.5774E-01

1.6766E-01

-1.0660E-01

4.3212E-02

-1.0977E-02

1.5971E-03

-1.0170E-04

S6

-2.3333E+00

1.4574E+00

-6.5473E-01

2.0596E-01

-4.3036E-02

5.3626E-03

-3.0146E-04

S7

-5.5813E-01

4.2121E-01

-2.1894E-01

7.7429E-02

-1.7830E-02

2.4143E-03

-1.4601E-04

S8

-2.3626E-02

8.9322E-03

-2.4322E-03

4.6403E-04

-5.8785E-05

4.4347E-06

-1.5052E-07

S9

-1.2595E-03

3.0162E-04

-5.0976E-05

5.9369E-06

-4.5303E-07

2.0368E-08

-4.0862E-10

S10

-4.4787E-04

8.0635E-05

-1.0216E-05

8.9056E-07

-5.0804E-08

1.7051E-09

-2.5474E-11

S11

6.1659E-07

-4.7612E-08

2.2671E-09

-5.3402E-11

-1.4244E-13

3.6492E-14

-5.7476E-16

S12

-2.1544E-07

2.6360E-08

-2.1257E-09

1.1234E-10

-3.7397E-12

7.1137E-14

-5.8989E-16

S13

-8.2210E-07

4.3287E-08

-1.6053E-09

4.1052E-11

-6.8878E-13

6.8158E-15

-3.0076E-17

S14

4.2163E-07

-2.5056E-08

1.0499E-09

-3.0302E-11

5.7301E-13

-6.3896E-15

3.1842E-17

TABLE 4 Table 4

Fig. 14 shows an on-axis chromatic aberration curve of the imaging lens of example two, which indicates the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Fig. 15 shows a magnification chromatic aberration curve of the imaging lens of example two, which shows the deviation of different image heights on the imaging plane after light passes through the imaging lens. Fig. 16 shows an astigmatism curve of the imaging lens of example two, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 17 shows a distortion curve of the imaging lens of example two, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 14 to 17, the imaging lens provided in example two can achieve good imaging quality.

Example three

As shown in fig. 18 to 24, an imaging lens of example three of the present application is described. Fig. 18 shows a schematic configuration of the imaging lens of the third example in the first state, fig. 19 shows a schematic configuration of the imaging lens of the third example in the second state, and fig. 20 shows a schematic configuration of the imaging lens of the third example in the third state.

As shown in fig. 18, the camera lens sequentially comprises a first lens element E1, a first spacer P1, a second lens element E2, a second spacer P2, a third lens element E3, a third spacer P3, a fourth lens element E4, a fourth spacer P4, a fourth auxiliary spacer P4b, a fifth lens element E5, a fifth spacer P5, a sixth lens element E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens element E7 and a seventh spacer P7 from the object side to the image side.

The second state shown in fig. 19 is similar to the first state shown in fig. 18, except that the spacers are slightly different in size.

The third state shown in fig. 20 is similar to the first state shown in fig. 18, except that the spacers are slightly different in size.

Table 5 shows a basic structural parameter table of an imaging lens of example three, in which the units of radius of curvature, thickness/distance are each millimeter mm.

TABLE 5

The cone coefficients and higher order coefficients that can be used for each of the aspherical mirror surfaces S1-S14 in example three are given in Table 6.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

8.6382E-04

-3.8092E-03

2.2336E-02

-7.9040E-02

1.8179E-01

-2.8514E-01

3.1420E-01

S2

-2.3457E-03

4.6705E-03

-1.7350E-02

6.0229E-02

-1.4354E-01

2.3416E-01

-2.6767E-01

S3

-1.4062E-02

5.5617E-03

-9.5339E-03

2.0402E-02

-1.5300E-02

-4.2002E-02

1.4130E-01

S4

-1.3537E-02

1.6169E-02

-9.4224E-02

4.1169E-01

-1.1911E+00

2.3810E+00

-3.3770E+00

S5

-3.1771E-03

1.5309E-02

-8.8091E-02

3.7111E-01

-1.0006E+00

1.8312E+00

-2.3311E+00

S6

-5.7366E-03

1.2091E-02

-4.6957E-02

1.3805E-01

-2.5297E-01

2.9497E-01

-1.9705E-01

S7

-3.4751E-02

2.6985E-02

-1.2972E-01

4.0421E-01

-9.2872E-01

1.5457E+00

-1.8670E+00

S8

-4.2892E-02

2.2096E-02

-2.3989E-02

-6.3949E-03

7.0427E-02

-1.3847E-01

1.6250E-01

S9

-7.5300E-02

4.3746E-02

-2.1817E-02

5.4511E-03

1.6876E-03

-2.5842E-03

1.4405E-03

S10

-9.2279E-02

4.2490E-02

-1.7475E-02

5.3085E-03

-1.0939E-03

4.3003E-04

-3.8035E-04

S11

-2.2545E-02

-3.0999E-04

2.4315E-03

-2.0612E-03

1.0412E-03

-3.4847E-04

8.1030E-05

S12

2.4885E-02

-9.1088E-03

3.0875E-03

-1.1507E-03

3.0533E-04

-4.3789E-05

6.0681E-07

S13

2.9099E-03

-2.3240E-02

2.0012E-02

-9.5797E-03

2.9717E-03

-6.3116E-04

9.4392E-05

S14

-1.0857E-02

-1.4898E-02

1.0327E-02

-3.6118E-03

8.0142E-04

-1.2166E-04

1.3103E-05

Face number

A18

A20

A22

A24

A26

A28

A30

S1

-2.4716E-01

1.3941E-01

-5.5915E-02

1.5562E-02

-2.8561E-03

3.1078E-04

-1.5183E-05

S2

2.1763E-01

-1.2632E-01

5.1870E-02

-1.4692E-02

2.7246E-03

-2.9707E-04

1.4396E-05

S3

-2.0746E-01

1.8640E-01

-1.1010E-01

4.3065E-02

-1.0768E-02

1.5613E-03

-9.9961E-05

S4

3.4435E+00

-2.5293E+00

1.3248E+00

-4.8222E-01

1.1580E-01

-1.6482E-02

1.0527E-03

S5

2.0885E+00

-1.3149E+00

5.7211E-01

-1.6558E-01

2.9521E-02

-2.7487E-03

8.3025E-05

S6

3.1815E-02

7.0797E-02

-7.4875E-02

3.7903E-02

-1.1101E-02

1.8046E-03

-1.2668E-04

S7

1.6403E+00

-1.0448E+00

4.7645E-01

-1.5138E-01

3.1789E-02

-3.9631E-03

2.2205E-04

S8

-1.2918E-01

7.1974E-02

-2.8184E-02

7.6055E-03

-1.3473E-03

1.4109E-04

-6.6197E-06

S9

-5.1118E-04

1.3075E-04

-2.5542E-05

3.8019E-06

-4.0143E-07

2.6071E-08

-7.6721E-10

S10

2.1855E-04

-7.4985E-05

1.6203E-05

-2.2421E-06

1.9357E-07

-9.5251E-09

2.0448E-10

S11

-1.3373E-05

1.5754E-06

-1.3146E-07

7.5852E-09

-2.8768E-10

6.4506E-12

-6.4778E-14

S12

1.0018E-06

-2.0493E-07

2.1672E-08

-1.4007E-09

5.5711E-11

-1.2577E-12

1.2372E-14

S13

-1.0069E-05

7.6648E-07

-4.1119E-08

1.5084E-09

-3.5682E-11

4.8343E-13

-2.7805E-15

S14

-1.0187E-06

5.7414E-08

-2.3247E-09

6.5941E-11

-1.2443E-12

1.4036E-14

-7.1627E-17

TABLE 6

Fig. 20 shows an on-axis chromatic aberration curve of the imaging lens of example three, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the imaging lens. Fig. 21 shows a magnification chromatic aberration curve of an imaging lens of example three, which represents a deviation of different image heights on an imaging plane after light passes through the imaging lens. Fig. 22 shows an astigmatism curve of the imaging lens of example three, which indicates meridional image plane curvature and sagittal image plane curvature. Fig. 23 shows a distortion curve of the imaging lens of example three, which represents distortion magnitude values corresponding to different angles of view.

As can be seen from fig. 20 to 23, the imaging lens given in example three can achieve good imaging quality.

In summary, examples one to three satisfy the relationships shown in table 7, respectively.

TABLE 7

Table 8 gives partial parameters of the imaging lenses of examples one to three.

Parameters/embodiments	1-1	1-2	1-3	2-1	2-2	2-3	3-1	3-2	3-3
										d6s	8.89	9.26	9.26	9.1	9.3	9.39	8.09	8.09	8.09
D6s	9.69	10.13	10.18	10.46	11.05	11.02	11.31	11.31	11.31
										EP01	1.04	1.04	1.04	1.14	1.14	1.19	1.06	1.06	1.06
CP1	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02
										EP12	0.52	0.52	0.52	0.58	0.58	0.53	0.55	0.55	0.55
CP2	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02
										EP23	0.62	0.63	0.63	0.27	0.27	0.27	0.36	0.36	0.36
CP3	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02
										EP34	0.48	0.56	0.74	0.72	0.72	0.72	0.4	0.4	0.4
EP45	0.48	0.49	0.63	0.7	0.7	0.7	0.48	0.68	0.56
										CP5	0.02	0.02	0.02	0.65	0.57	0.46	0.68	0.56	0.68
EP56	0.58	0.57	0.57	0.54	0.62	0.65	0.67	0.67	0.67
										CP6	0.51	0.52	0.52	0.49	0.49	0.58	0.03	0.03	0.03
EP67	0.42	0.41	0.46	0.91	0.86	0.91	1.14	1.13	1.09

TABLE 8

Note that 1-1 in table 7 and table 8 indicates a first state of the imaging lens in example one, 1-2 indicates a second state of the imaging lens in example one, and 1-3 indicates a third state of the imaging lens in example one. 2-1 denotes a first state of the image pickup lens in the second example, 2-2 denotes a second state of the image pickup lens in the second example, 2-3 denotes a third state of the image pickup lens in the second example, 3-1 denotes a first state of the image pickup lens in the third example, 3-2 denotes a second state of the image pickup lens in the third example, and 3-3 denotes a third state of the image pickup lens in the third example.

Table 9 gives effective focal lengths of the first lens, the second optical element, and the third lens of the imaging lenses of examples one to three.

TABLE 9

The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the above-described imaging lens.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An image pickup lens, characterized by comprising:

A lens barrel;

a lens group assembled in the lens barrel, the lens group including, in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens;

The lens group further comprises a plurality of shading elements, wherein the shading elements at least comprise a first shading element to a seventh shading element;

a first light shielding element located between the first lens and the second lens and in contact with an image side portion of the first lens;

A second light shielding element located between the second lens and the third lens and in contact with an image side portion of the second lens;

A third light shielding element is positioned between the third lens and the fourth lens and is in contact with an image side surface part of the third lens;

a fourth light shielding element is positioned between the fourth lens and the fifth lens and is in contact with an image side surface part of the fourth lens;

A fifth light shielding element is positioned between the fifth lens and the sixth lens and is in contact with an image side surface portion of the fifth lens;

A sixth light shielding element is located between the sixth lens and the seventh lens and is in contact with an image side portion of the sixth lens;

a seventh light shielding element is positioned at the image side of the seventh lens and is contacted with the image side surface part of the seventh lens;

wherein, satisfy between the first shading element, the second shading element and the third shading element:

CP1=CP2=CP3;

the imaging lens satisfies the following conditions that-12 < (f1+f2)/(CP1+EP 12+CP2+EP 23) < -5;

wherein f1 is an effective focal length of the first lens element, f2 is an effective focal length of the second lens element, CP1 is a maximum thickness of the first light shielding element, CP2 is a maximum thickness of the second light shielding element, CP3 is a maximum thickness of the third light shielding element, EP12 is an axial distance from an image side surface of the first light shielding element to an object side surface of the second light shielding element, and EP23 is an axial distance from an image side surface of the second light shielding element to an object side surface of the third light shielding element.

2. The imaging lens as claimed in claim 1, wherein 35< T23/CP2+T34/CP3<45, wherein CP2 is a maximum thickness of the second light shielding element, CP3 is a maximum thickness of the third light shielding element, T23 is an on-axis distance from an image side surface of the second lens to an object side surface of the third lens, and T34 is an on-axis distance from the image side surface of the third lens to the object side surface of the fourth lens.

3. The imaging lens according to claim 1, wherein the imaging lens satisfies 1< EP34/CT4 x N4<4, where EP34 is an on-axis distance from an image side surface of the third light shielding element to an object side surface of the fourth light shielding element, CT4 is a center thickness of the fourth lens, and N4 is a refractive index of the fourth lens.

4. The imaging lens as claimed in claim 1, wherein the imaging lens satisfies 3< f 45/(EP 45+cp5+ep 56) <7, wherein f45 is a combined focal length of the fourth lens element and the fifth lens element, EP45 is an on-axis distance from an image side surface of the fourth light shielding element to an object side surface of the fifth light shielding element, EP56 is an on-axis distance from the image side surface of the fifth light shielding element to the object side surface of the sixth light shielding element, and CP5 is a maximum thickness of the fifth light shielding element.

5. The imaging lens as claimed in claim 1, wherein the imaging lens satisfies 10< f6/EP56-f7/EP67<25, wherein f6 is an effective focal length of the sixth lens, f7 is an effective focal length of the seventh lens, EP56 is an on-axis distance from an image side surface of the fifth light shielding element to an object side surface of the sixth light shielding element,

EP67 is the on-axis distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element.

6. The imaging lens according to any one of claims 1 to 5, wherein the imaging lens satisfies:

-20< f7/EP 67N 7< -5, wherein f7 is the effective focal length of the seventh lens, EP67 is the on-axis distance from the image side of the sixth light-shielding element to the object side of the seventh light-shielding element, and N7 is the refractive index of the seventh lens.

7. The imaging lens according to any one of claims 1 to 5, wherein the imaging lens satisfies 5<f/(CP 5+cp 6) <15, where f is a focal length of the imaging lens, CP5 is a maximum thickness of the fifth light shielding element, and CP6 is a maximum thickness of the sixth light shielding element.

8. The imaging lens according to any one of claims 1 to 5, wherein the lens group further includes a fourth auxiliary light shielding element, the fourth auxiliary light shielding element being located between the fourth light shielding element and the fifth lens.

9. The imaging lens according to any one of claims 1 to 5, wherein the lens group further includes a fifth auxiliary light shielding element, the fifth auxiliary light shielding element being located between the fifth light shielding element and the sixth lens.

10. The imaging lens according to any one of claims 1 to 5, wherein the lens group further includes a sixth auxiliary light shielding element, the sixth auxiliary light shielding element being located between the sixth light shielding element and the seventh lens.