CN211786326U - Optical imaging lens, imaging module and electronic device - Google Patents

Abstract

The application relates to an optical imaging lens, an imaging module and an electronic device. The optical imaging lens sequentially comprises diaphragms from an object side to an image side along an optical axis; the first lens element with positive refractive power has a convex object-side surface at a paraxial region; a second lens element with refractive power; a third lens element with refractive power having a concave object-side surface at a paraxial region; a fourth lens element with refractive power; a fifth lens element with positive refractive power having a convex image-side surface at a paraxial region; a sixth lens element with refractive power; and a seventh lens element with negative refractive power having a concave image-side surface at the paraxial region. When the optical imaging lens meets the specific relation, the optical imaging lens has the characteristics of wide visual angle, high image resolution and miniaturization.

Description

Optical imaging lens, imaging module and electronic device

technical field

The utility model relates to the technical field of optical imaging, in particular to an optical imaging lens, an imaging module and an electronic device.

Background technique

In recent years, with the development of camera technology, people have higher and higher requirements for the shooting angle of view and imaging quality of the lens, and the structural characteristics of light, thin and miniaturization have gradually become the development trend of the lens.

Traditional optical imaging lenses usually use more than six lenses to obtain higher resolution, but increasing the number of lenses will affect the miniaturization of the lens, which conflicts with the lightweight design concept of portable electronic devices for mobile phones, and also increases the number of lenses. The production cost of the lens; although reducing the number of lenses can directly shorten the total length of the lens, it cannot guarantee the shooting angle of view and resolution capability of the lens.

Utility model content

Based on this, it is necessary to provide an improved optical imaging lens in order to solve the problem that the traditional optical imaging lens is difficult to take into account the wide angle of view, miniaturization and high resolution capability.

An optical imaging lens, the optical imaging lens includes a diaphragm in sequence from an object side to an image side along an optical axis; a first lens with positive refractive power, the object side of the first lens is a convex surface near the optical axis The second lens with refractive power; the third lens with refractive power; the fourth lens with refractive power; the fifth lens with positive refractive power, the image side near optical axis of the fifth lens is convex; with a sixth lens with refractive power; and a seventh lens with negative refractive power, the image side near optical axis of the seventh lens is concave;

The optical imaging lens satisfies the following relationship:

(SAG51+SAG52)/(SAG61+SAG62)≤1;

Wherein, SAG51 represents the distance from the intersection of the object side of the fifth lens and the optical axis to the maximum effective aperture of the object side of the fifth lens in the direction of the optical axis, and SAG52 represents the image side of the fifth lens and the optical axis. The distance from the intersection of the axes to the maximum effective aperture of the image side of the fifth lens in the direction of the optical axis, SAG61 represents the intersection of the object side of the sixth lens and the optical axis to the maximum effective aperture of the sixth lens. The distance of the aperture in the direction of the optical axis, the distance from the intersection of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side of the sixth lens in the direction of the optical axis.

The above-mentioned optical imaging lens, by selecting an appropriate number of lenses and reasonably allocating the refractive power, surface shape and effective focal length of each lens, can ensure the wide viewing angle and miniaturization of the optical imaging lens while enhancing the imaging resolution capability of the lens. And effectively correct the aberration, so that it can capture the details of the scene more accurately; at the same time, by controlling the object side sagittal height and image side sagittal height of the fifth lens and the object side sagittal height and image side sagittal height of the sixth lens, the above relationship is satisfied, which is beneficial to ensure the lens. It can effectively control distortion while having a wide viewing angle, reduce the processing sensitivity of the lens, and improve the production yield.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

∑ETA/TTL≤0.5; wherein, ∑ETA represents the position from the maximum effective aperture of the image side of the former lens to the maximum effective aperture of the object side of the latter lens among the adjacent lenses of the first lens to the seventh lens The sum of the distances in the direction of the optical axis, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens.

When the above relationship is satisfied, the air interval between the maximum effective apertures of adjacent lenses in the optical imaging lens and the total length of the lens can be reasonably configured, so that the arrangement structure of the optical imaging lens is more compact, and the miniaturization of the lens is realized.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

3mm/deg≤100*∑CT/FOV≤5mm/deg; wherein, ∑CT represents the sum of the thicknesses on the optical axis of each lens from the first lens to the seventh lens, and FOV represents the optical imaging lens The field of view in the diagonal direction.

When the above relationship is satisfied, the thickness of each lens in the optical imaging lens on the optical axis and the angle of view in the diagonal direction of the lens can be reasonably configured to effectively compress the thickness of each lens while ensuring a wide angle of view of the lens, thereby realizing the lens of miniaturization.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

0≤Y61-Y52≤0.5mm; wherein, Y52 represents the maximum effective aperture on the image side of the fifth lens, and Y61 represents the maximum effective aperture on the object side of the sixth lens.

When the above relationship is satisfied, it is beneficial to realize the wide-angle and miniaturization of the optical imaging lens, and at the same time, it is also beneficial to make the arrangement of the lenses in the lens more compact, so that the installation of spacers and other related components can be avoided, which is beneficial to reduce the lens. In addition, the compact arrangement structure is also conducive to shortening the time between the maximum effective aperture of the fifth lens and the maximum effective aperture of the sixth lens. Air space, and avoids the use of spacers, thereby greatly reducing the generation of stray light, reducing the probability of ghosting, and improving the imaging quality of the lens.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

1≤(CT6+CT7)/CT5≤2; wherein, CT5 represents the thickness of the fifth lens on the optical axis, CT6 represents the thickness of the sixth lens on the optical axis, and CT7 represents the seventh lens on the optical axis. Thickness on the optical axis.

When the above relationship is satisfied, the thicknesses of the fifth, sixth and seventh lenses on the optical axis can be reasonably configured, so that the aberration can be effectively suppressed while the angle of view is enlarged, and the imaging quality can be improved.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

(ET2+ET3)/(CT2+CT3)≤1.5; wherein, ET2 represents the distance from the maximum effective aperture on the object side of the second lens to the maximum effective aperture on the image side in the direction of the optical axis, and ET3 represents the The distance from the maximum effective aperture on the object side of the third lens to the maximum effective aperture on the image side in the direction of the optical axis, CT2 represents the thickness of the second lens on the optical axis, and CT3 represents the third lens at Thickness on the optical axis.

When the above relationship is satisfied, it is conducive to the wide-angle of the lens, and at the same time, it can make the light transition smoothly, reduce the generation of stray light between the lenses, and reduce the probability of ghosting; in addition, by reasonably configuring the center thickness of the second lens, The thickness at the maximum effective aperture, the central thickness of the third lens, and the thickness at the maximum effective aperture can effectively reduce the sensitivity of the lens, facilitate lens molding and assembly, improve production yield, and reduce quality control costs.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

1≤TTL/f≤1.5; wherein, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f represents the effective focal length of the optical imaging lens.

When the above relationship is satisfied, the total length of the lens and the effective focal length of the lens can be reasonably configured, which is beneficial to achieve miniaturization while ensuring a wide angle of view of the lens.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

1≤TTL/ImgH≤2; wherein, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and ImgH represents the effective pixel area on the imaging surface of the optical imaging lens half the length of the diagonal.

When the above relationship is satisfied, the overall length and image height of the lens can be reasonably configured, which is beneficial to make the lens system meet the high-resolution imaging requirements while ensuring the miniaturization of the lens.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

0.5≤f5/f≤1.5; wherein, f5 represents the effective focal length of the fifth lens, and f represents the effective focal length of the optical imaging lens.

When the above relationship is satisfied, the refractive power of the fifth lens can be reasonably distributed, which is beneficial to correct spherical aberration of off-axis rays at different aperture positions and improve imaging quality.

In one of the embodiments, the optical imaging lens satisfies the following relationship:

-2≤f7/f<0; wherein, f7 represents the effective focal length of the seventh lens, and f represents the effective focal length of the optical imaging lens.

When the above relationship is satisfied, the refractive power of the seventh lens can be reasonably allocated, which is beneficial to balance astigmatism, improve imaging quality, reduce the sensitivity of the lens, improve the production yield of the lens, and reduce the cost of quality control.

The present application also provides an imaging module.

An imaging module includes the aforementioned optical imaging lens and a photosensitive element, wherein the photosensitive element is arranged on the image side of the optical imaging lens.

The above-mentioned imaging module can take images with high pixels and wide viewing angle by using the aforementioned optical imaging lens. At the same time, the imaging module also has the characteristics of miniaturization and light weight, which is convenient to adapt to the size of mobile phone, tablet and vehicle lens. restricted device.

The present application also provides an electronic device.

An electronic device includes a casing and an imaging module as described above, wherein the imaging module is mounted on the casing.

The above-mentioned electronic device can obtain images with a wide viewing angle and high pixels by using the aforementioned imaging module, thereby improving the user's shooting experience.

Description of drawings

FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application;

FIG. 2 shows a longitudinal spherical aberration graph, an astigmatism graph, and a distortion graph of the optical imaging lens of Embodiment 1, respectively;

FIG. 3 shows a schematic structural diagram of the optical imaging lens of Embodiment 2 of the present application;

FIG. 4 shows a longitudinal spherical aberration curve graph, an astigmatism graph and a distortion graph of the optical imaging lens of Embodiment 2, respectively;

FIG. 5 shows a schematic structural diagram of the optical imaging lens of Embodiment 3 of the present application;

FIG. 6 shows a longitudinal spherical aberration graph, an astigmatism graph, and a distortion graph of the optical imaging lens of Embodiment 3, respectively;

FIG. 7 shows a schematic structural diagram of the optical imaging lens of Embodiment 4 of the present application;

FIG. 8 shows a longitudinal spherical aberration graph, an astigmatism graph, and a distortion graph of the optical imaging lens of Embodiment 4, respectively;

FIG. 9 shows a schematic structural diagram of the optical imaging lens of Embodiment 5 of the present application;

FIG. 10 shows a longitudinal spherical aberration graph, an astigmatism graph, and a distortion graph of the optical imaging lens of Embodiment 5, respectively;

FIG. 11 shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application;

FIG. 12 shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens of Embodiment 6, respectively;

13 shows a schematic structural diagram of the optical imaging lens of Embodiment 7 of the present application;

FIG. 14 shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens of Embodiment 7 respectively;

FIG. 15 shows a schematic structural diagram of an imaging module according to an embodiment of the present application.

Detailed ways

In order to facilitate the understanding of the present utility model, the present utility model will be more fully described below with reference to the related drawings. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided for a thorough and complete understanding of the present disclosure.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "front", "rear", "circumferential" and similar expressions are The orientation or positional relationship shown in the figures is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this specification, the expressions first, second, third, etc. are only used to distinguish one feature from another feature and do not imply any limitation on the feature. Accordingly, the first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application. For ease of explanation, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are examples only and are not drawn strictly to scale.

In this specification, the space on the side where the object is located relative to the optical element is called the object side of the optical element. Correspondingly, the image formed by the object relative to the side space where the optical element is located is called the image of the optical element. side. The surface of each lens closest to the object is called the object side, and the surface of each lens closest to the imaging surface is called the image side. And define the positive direction of the distance from the object side to the image side.

In addition, in the following description, if the lens surface is convex and the position of the convex surface is not defined, it means that the surface of the lens is convex at least near the optical axis; if the surface of the lens is concave and the position of the concave surface is not defined, it means that the surface is convex. The lens surface is concave at least near the optical axis. Here, near the optical axis refers to an area near the optical axis.

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

Please refer to FIG. 1 , FIG. 3 , FIG. 5 , FIG. 7 , FIG. 9 , FIG. 11 , and FIG. 13 , the embodiments of the present application provide an optical imaging lens that can take into account a wide viewing angle, high pixels, and miniaturization. Specifically, the optical imaging lens includes seven lenses with refractive power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The seven lenses are sequentially arranged along the optical axis from the object side to the image side, and the imaging surface of the optical imaging lens is located on the image side of the seventh lens.

The first lens has a positive refractive power, and its object side surface near the optical axis is a convex surface, which is conducive to making the light incident into the optical imaging lens, and through the refraction of other lenses in the optical imaging lens to make the light converge to the imaging surface of the lens, Thereby, the image quality is improved while ensuring the wide angle of view of the lens.

The second lens has a refractive power, and its object side surface is concave, which is beneficial to correct aberrations caused by the refracting of the light by the first lens, thereby further improving the imaging quality.

The third lens has a refractive power, which is beneficial to balance the chromatic aberration generated by the light being refracted by the first lens and the second lens, thereby further improving the pixel image quality.

The fourth lens has refractive power, which is conducive to further condensing the light refracted by the third lens to ensure image quality.

The fifth lens has a positive refractive power, and its image side surface is convex at the near optical axis, which is beneficial to correct spherical aberration of off-axis light at different aperture positions and improve imaging quality.

The sixth lens has a refractive power, and the sixth lens is made of a high-refractive material, which is conducive to regulating the refraction of light, thereby further improving the imaging quality.

The seventh lens has a negative refractive power, and its image side near optical axis is concave, which is conducive to balancing astigmatism, improving imaging quality, reducing the sensitivity of the lens, improving the production yield of the lens, and reducing production costs. .

The optical imaging lens is also provided with a diaphragm, and the diaphragm is arranged on the object side of the optical imaging lens, so as to better control the size of the incident light beam and improve the imaging quality of the optical imaging lens. Specifically, the diaphragm includes an aperture diaphragm and a field diaphragm. Preferably, the diaphragm is an aperture diaphragm. The aperture stop can be located on the surface of the lens (eg, the object side and the image side) and is in operative relationship with the lens, for example, by applying a light-blocking coating to the surface of the lens to form the aperture stop on that surface; or by clamping The holder is fixed to hold the surface of the lens, and the holder structure located on the surface can limit the width of the imaging beam of the object point on the axis, thereby forming an aperture stop on the surface.

Specifically, the optical imaging lens satisfies the following relationship:

(SAG51+SAG52)/(SAG61+SAG62)≤1; in which, SAG51 represents the distance from the intersection of the object side of the fifth lens and the optical axis to the maximum effective aperture of the object side of the fifth lens in the direction of the optical axis, and SAG52 represents The distance from the intersection of the image side and the optical axis of the fifth lens to the maximum effective aperture of the fifth lens in the direction of the optical axis, SAG61 represents the intersection of the object side of the sixth lens and the optical axis to the object side of the sixth lens The distance from the maximum effective aperture in the direction of the optical axis, the distance from the intersection of the image side of the sixth lens of SAG62 and the optical axis to the maximum effective aperture of the image side of the sixth lens in the direction of the optical axis. (SAG51+SAG52)/(SAG61+SAG62) can be 0.6, 0.64, 0.68, 0.72, 0.76, 0.8, 0.84, 0.88, 0.92, 0.96 or 1. Under the condition that the above relationship is satisfied, it is beneficial to effectively control the distortion while ensuring a wide viewing angle of the lens, reduce the processing sensitivity of the lens, and improve the production yield. When (SAG51+SAG52)/(SAG61+SAG62) is greater than 1, it is easy to cause the difference in the degree of curvature of the fifth lens and the sixth lens to be too large, which is not conducive to distortion control, and is not conducive to lens molding and assembly.

Further, the above relationship satisfies: 0.64≤(SAG51+SAG52)/(SAG61+SAG62)≤0.93, so as to better balance the wide-angle characteristics of the lens and the imaging distortion and ensure the imaging quality.

When the above-mentioned optical imaging lens is used for imaging, the light emitted or reflected by the subject enters the optical imaging lens from the object side direction, and passes through the first lens, the second lens, the third lens, the fourth lens, and the fifth lens in sequence , the sixth lens and the seventh lens, and finally converge on the imaging surface.

The above-mentioned optical imaging lens, by selecting an appropriate number of lenses and reasonably allocating the refractive power, surface shape and effective focal length of each lens, can ensure the wide-angle and miniaturization of the optical imaging lens while enhancing the imaging resolution capability of the lens. And effectively correct the aberration, so that it can more accurately capture the details of the scene and improve the image quality.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

∑ETA/TTL≤0.5; where, ∑ETA indicates that among the adjacent lenses from the first lens to the seventh lens, the maximum effective aperture on the image side of the former lens to the maximum effective aperture on the object side of the latter lens is in the direction of the optical axis TTL represents the distance on the optical axis from the object side of the first lens to the imaging plane of the optical imaging lens. ΣETA/TTL can be 0.12, 0.14, 0.16, 0.18, 0.19, 0.2, 0.21, 0.3, 0.4 or 0.5. Under the condition that the above relationship is satisfied, the air interval between the maximum effective apertures of the adjacent lenses in the optical imaging lens and the total length of the lens can be reasonably configured, so that the arrangement structure of the optical imaging lens is more compact and the lens is small. change. However, when ∑ETA/TTL is greater than 0.5, the lenses are far apart, which is prone to eccentricity and is not conducive to shortening the total length of the lens.

Further, the above relational expression satisfies: 0.14≤∑ETA/TTL≤0.22, so as to ensure the imaging quality and at the same time make the arrangement between the lenses more compact and ensure miniaturization.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

3mm/deg≤100*∑CT/FOV≤5mm/deg; where ∑CT represents the sum of the thicknesses on the optical axis of each lens from the first lens to the seventh lens, and FOV represents the viewing angle in the diagonal direction of the optical imaging lens. field angle. 100*ΣCT/FOV can be 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.2, 4.4, 4.6 or 4.8 in units of (mm/deg). Under the condition that the above relationship is satisfied, the thickness of each lens in the optical imaging lens on the optical axis and the angle of view in the diagonal direction of the lens can be reasonably configured to effectively compress the thickness of each lens while ensuring the wide viewing angle of the lens. Realize the miniaturization of the lens. When 100*∑CT/FOV is less than 3, it is difficult to ensure the imaging quality of the edge viewing angle; and when 100*∑CT/FOV is greater than 5, the thickness of each lens is large, which is not conducive to miniaturization.

Further, the above relational expression satisfies: 3.61≤100*∑CT/FOV≤4.64, so as to better balance the field of view and the thickness of each lens and ensure miniaturization.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

0≤Y61-Y52≤0.5mm; wherein, Y52 represents the maximum effective aperture on the image side of the fifth lens, and Y61 represents the maximum effective aperture on the object side of the sixth lens. Y61-Y52 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm. Under the condition that the above relationship is satisfied, it is beneficial to realize the wide-angle and miniaturization of the optical imaging lens, and at the same time, it is also beneficial to make the arrangement of the lenses in the lens more compact, so that the spacer and other related components can be avoided, and the It is beneficial to reduce the production cost of the lens, shorten the production overtime, and ensure the production profit and product delivery rate; in addition, the compact arrangement structure is also conducive to shortening the maximum effective aperture of the fifth lens to the maximum effective aperture of the sixth lens The air space between the parts and the use of spacers are avoided, thereby greatly reducing the generation of stray light, reducing the probability of ghosting, and improving the imaging quality of the lens. When Y61-Y52 is less than 0, it is not conducive to the light imaging of the edge viewing angle, which is easy to reduce the imaging quality; and when Y61-Y52 is greater than 0.5mm, the difference between the effective aperture of the fifth lens and the effective aperture of the sixth lens is large, and it is easy to The formation of stray light, reduce the image quality.

Further, the above relationship satisfies: 0.11mm≤Y61-Y52≤0.35mm, so as to shorten the distance between the fifth lens and the sixth lens more reasonably, avoid the generation of stray light, and at the same time ensure miniaturization and reduce production costs.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

1≤(CT6+CT7)/CT5≤2; where CT5 represents the thickness of the fifth lens on the optical axis, CT6 represents the thickness of the sixth lens on the optical axis, and CT7 represents the thickness of the seventh lens on the optical axis. (CT6+CT7)/CT5 can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 or 1.9. Under the condition that the above relationship is satisfied, the thicknesses of the fifth, sixth and seventh lenses on the optical axis can be reasonably configured, so that the aberration can be effectively suppressed while the field of view is enlarged, and the imaging quality can be improved. When (CT6+CT7)/CT5 is lower than the lower limit or higher than the upper limit, it is difficult to achieve a balance between wide viewing angle and aberration suppression.

Further, the above relationship satisfies: 1≤(CT6+CT7)/CT5≤1.49, so as to set the thickness of the lens more reasonably, so as to better balance the relationship between the wide viewing angle characteristic of the lens and the suppression of aberrations.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

(ET2+ET3)/(CT2+CT3)≤1.5; among them, ET2 represents the distance from the maximum effective aperture on the object side of the second lens to the maximum effective aperture on the image side in the direction of the optical axis, and ET3 represents the third lens The distance from the maximum effective aperture on the object side to the maximum effective aperture on the image side in the direction of the optical axis, CT2 represents the thickness of the second lens on the optical axis, and CT3 represents the thickness of the third lens on the optical axis. (ET2+ET3)/(CT2+CT3) can be 1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4 or 1.45. Under the condition that the above relationship is satisfied, it is conducive to the wide-angle of the lens, and at the same time, the light can be smoothly transitioned, the generation of stray light between the lenses is reduced, and the probability of ghosting is reduced. The central thickness, the thickness at the maximum effective aperture, the central thickness of the third lens, and the thickness at the maximum effective aperture can effectively reduce the sensitivity of the lens, facilitate the molding and assembly of the lens, improve the production yield, and reduce the cost of quality control. When (ET2+ET3)/(CT2+CT3) is greater than 1.5, the air gap at the maximum effective aperture of the second lens and the third lens is too large, which is easy to cause the lens to bend, which is not conducive to the molding and assembly of the lens. It is not conducive to the smooth transition of light, and it is easy to form stray light, which reduces the imaging quality.

Further, the above relationship satisfies: 1.02≤(ET2+ET3)/(CT2+CT3)≤1.11, so as to more reasonably set the thickness at the maximum effective aperture of the second lens and the third lens and the central thickness, thereby ensuring the imaging quality , to facilitate the molding and assembly of the lens, and improve the production yield.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

1≤TTL/f≤1.5; wherein, TTL represents the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f represents the effective focal length of the optical imaging lens. TTL/f can be 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45 or 1.5. Under the condition that the above relationship is satisfied, the total length of the lens and the effective focal length of the lens can be reasonably configured, which is beneficial to realize the miniaturization while ensuring the wide angle of view of the lens. When TTL/f is less than 1, the effective focal length of the lens is too large, which is not conducive to wide-angle; and when TTL/f is greater than 1.5, the overall length of the lens is large, which is not conducive to miniaturization.

Further, the above relationship satisfies: 1.3≤TTL/f≤1.39, so as to better balance the total length of the lens and the effective focal length of the lens, so as to achieve miniaturization while ensuring a wide angle of view of the lens.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship:

1≤TTL/ImgH≤2; where, TTL represents the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and ImgH represents half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens . TTL/ImgH can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2. Under the condition that the above relationship is satisfied, the total length and image height of the lens can be reasonably configured, which is beneficial to make the lens system meet the high-resolution imaging requirements while ensuring the miniaturization of the lens. When the TTL/ImgH is less than 1, the image height is large, which is easy to reduce the resolution of the lens; and when the TTL/ImgH is greater than 2, the total length of the lens is large, which is not conducive to miniaturization.

Further, the above relationship satisfies: 1.34≤TTL/ImgH≤1.52, so as to better balance the total length of the lens and the image height, so that the lens has a wide angle and high resolution performance.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship: 0.5≤f5/f≤1.5; wherein, f5 represents the effective focal length of the fifth lens, and f represents the effective focal length of the optical imaging lens. f5/f may be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4 or 1.5. Under the condition that the above relational expressions are satisfied, the refractive power of the fifth lens can be reasonably allocated, which is beneficial to correct the spherical aberration of off-axis rays at different aperture positions and improve the imaging quality. When f5/f is less than 0.5, the refractive power of the fifth lens is too large, which is prone to overcorrection and reduces the imaging quality; and when f5/f is greater than 1.5, the refractive power of the fifth lens is small, and it is easy to be under-corrected, which reduces the imaging quality. quality.

Further, the above relationship satisfies: 0.71≤f5/f≤1.19, so as to select the refractive power of the fifth lens more reasonably, to better correct the spherical aberration of the off-axis field of view light, and to improve the imaging quality.

In an exemplary embodiment, the optical imaging lens satisfies the following relationship: -2≤f7/f<0; wherein, f7 represents the effective focal length of the seventh lens, and f represents the effective focal length of the optical imaging lens. f7/f can be -1.8, -1.6, -1.4, -1.2, -1, -0.9, -0.8, or -0.6. Under the condition that the above relationship is satisfied, the refractive power of the seventh lens can be reasonably distributed, which is conducive to balancing astigmatism, improving imaging quality, reducing the sensitivity of the lens, improving the production yield of the lens, and reducing the quality control. cost. When f7/f is less than -2, the refractive power of the seventh lens is small, which is not conducive to correcting lens aberrations and reducing lens sensitivity; and when f7/f is greater than or equal to 0, it cannot provide negative power for the lens. Inflection force, not conducive to imaging.

Further, the above relationship satisfies: -1.49≤f7/f≤-0.82, so as to select the refractive power of the seventh lens more reasonably, so as to better balance the astigmatism, improve the imaging quality, reduce the sensitivity of the lens, and improve the lens production yield.

In an exemplary embodiment, among the first to seventh lenses, the object side and/or the image side of at least one of the lenses are aspherical. Through the above method, the flexibility of lens design can be improved, aberration can be corrected effectively, and the imaging quality of the optical imaging lens can be improved. It should be noted that the surface of each lens in the optical imaging lens may also be any combination of spherical and aspherical surfaces, and not necessarily all spherical surfaces or all aspherical surfaces.

In an exemplary embodiment, each lens in the optical imaging lens can be made of glass or all plastic. The plastic lens can reduce the weight and production cost of the optical imaging lens, and the glass lens can make the optical imaging lens It has good temperature tolerance and excellent optical properties. Further, when used in light and thin electronic devices such as mobile phones and tablets, the material of each lens is preferably plastic to better reduce the weight of the device. It should be noted that the material of each lens in the optical imaging lens can also be any combination of glass and plastic, not necessarily all glass or all plastics.

In an exemplary embodiment, the optical imaging lens further includes an infrared filter. The infrared filter is set on the image side of the sixth lens to filter incident light, specifically to isolate infrared light and prevent infrared light from being absorbed by the photosensitive element, thereby preventing infrared light from affecting the color and clarity of normal images, improving The imaging quality of an optical imaging lens.

In an exemplary embodiment, the optical imaging lens may further include a protective glass. The protective glass is located on the image side of the infrared filter, which protects the photosensitive element, and also prevents the photosensitive element from being contaminated with dust, which further ensures the image quality. It should be pointed out that when applied to portable electronic devices such as mobile phones and tablets, in order to ensure the lightness and thinness of the devices, it is also possible to choose not to provide protective glass, which is not limited in this application.

The optical imaging lens of the above-mentioned embodiments of the present application may employ multiple lenses, for example, the seven lenses described above. By reasonably allocating the focal length, refractive power, surface shape, thickness, and on-axis distance between the lenses, etc., the above-mentioned optical imaging lens can be guaranteed to have a small overall length, light weight, and high imaging resolution. It has a larger aperture (FNO can be 1.88) and a larger field of view, so as to better meet the application requirements of lightweight electronic devices such as mobile phones and tablets. However, those skilled in the art should understand that, without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain various results and advantages described in this specification.

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

Example 1

The optical imaging lens 100 of Embodiment 1 of the present application will be described below with reference to FIGS. 1 to 2 .

FIG. 1 shows a schematic structural diagram of the optical imaging lens 100 of the first embodiment. As shown in FIG. 1 , the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens in sequence from the object side to the image side along the optical axis. Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is concave at the optical axis. The circumference is concave.

The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and the circumference is concave, and the image side S6 is convex at the optical axis. The circumference is convex.

The fourth lens L4 has a negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side and the image side of the first lens L1 to the seventh lens L7 are set as aspherical surfaces, which is conducive to correcting aberrations and solving the problem of image surface distortion, and can also make the lenses smaller, thinner and flatter. In this way, excellent optical imaging effects can be achieved, so that the optical imaging lens 100 has the characteristics of miniaturization.

The first lens L1 to the sixth lens L7 are all made of plastic, and the use of plastic lenses can reduce the weight of the optical imaging lens 100 and reduce the production cost.

A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes a filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16. The light from the object OBJ sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17. Further, the filter 110 is an infrared filter, which is used to filter out the infrared light from the external light incident on the optical imaging lens 100 to avoid image color distortion. Specifically, the material of the filter 110 is glass.

Table 1 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) and effective focal length of the lens of the optical imaging lens 100 of Embodiment 1, wherein the curvature radius, thickness, The effective focal length of a lens is in millimeters (mm). In addition, taking the first lens L1 as an example, the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis, and the second value is the direction from the image side to the image side of the lens The distance of the object side of the latter lens on the optical axis; the value of the aperture ST0 in the "thickness" parameter column is the vertex of the aperture ST0 to the object side of the latter lens (the vertex refers to the intersection of the lens and the optical axis) in the light The distance on the axis, we default that the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When the value is negative, it means that the aperture ST0 is set on the object side of the lens in Figure 1. On the right side of the vertex, if the thickness of the diaphragm STO is positive, the diaphragm is on the left side of the vertex on the object side of the lens.

Table 1

The aspheric surface type in a lens is defined by the following formula:

Among them, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is Table 1 The reciprocal of the radius of curvature R); k is the conic coefficient; Ai is the i-th order coefficient of the aspheric surface. Table 2 below gives the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the lens aspheric surfaces S1-S14 in Example 1.

Table 2

The distance TTL from the object side S1 of the first lens L1 to the imaging surface S17 of the optical imaging lens 100 on the optical axis is 5.47 mm, and the half ImgH of the diagonal length of the effective pixel area on the imaging surface S17 of the optical imaging lens 100 is 4 mm. Combining with the data in Table 1 and Table 2, it can be known that the optical imaging lens 100 in Embodiment 1 satisfies:

(SAG51+SAG52)/(SAG61+SAG62)=0.641, where SAG51 represents the intersection of the object side S9 of the fifth lens L5 and the optical axis to the maximum effective aperture of the object side S9 of the fifth lens L5 in the direction of the optical axis Distance, SAG52 represents the distance from the intersection of the image side S10 of the fifth lens L5 and the optical axis to the maximum effective aperture of the image side S10 of the fifth lens L5 in the direction of the optical axis, SAG61 represents the object side S11 of the sixth lens L6 and the optical axis. The distance from the intersection of the axes to the maximum effective aperture of the object side S11 of the sixth lens L6 in the direction of the optical axis, SAG62 The intersection of the image side S12 of the sixth lens L6 and the optical axis to the maximum effective aperture of the image side S12 of the sixth lens L6 The distance in the direction of the optical axis;

∑ETA/TTL=0.14, where ∑ETA indicates that among the adjacent lenses from the first lens L1 to the seventh lens L7, the maximum effective aperture on the image side of the former lens is located at the maximum effective aperture on the object side of the latter lens. The sum of the distances in the axial direction, TTL represents the distance on the optical axis from the object side S1 of the first lens L1 to the imaging surface S17 of the optical imaging lens 100;

100*∑CT/FOV=3.731mm/deg, where ∑CT represents the sum of the thicknesses of the first lens L1 to the seventh lens L7 on the optical axis, and FOV represents the diagonal view of the optical imaging lens 100. field angle;

Y61-Y52=0.114mm, wherein, Y52 represents the maximum effective aperture of the image side S10 of the fifth lens L5, and Y61 represents the maximum effective aperture of the object side S11 of the sixth lens L6;

(CT6+CT7)/CT5=1.105, where CT5 represents the thickness of the fifth lens L5 on the optical axis, CT6 represents the thickness of the sixth lens L6 on the optical axis, and CT7 represents the thickness of the seventh lens L7 on the optical axis ,;

(ET2+ET3)/(CT2+CT3)=1.022, where ET2 represents the distance from the maximum effective aperture of the object side S3 of the second lens L2 to the maximum effective aperture of the image side S4 in the direction of the optical axis, ET3 represents The distance from the maximum effective aperture of the object side S5 of the third lens L3 to the maximum effective aperture of the image side S6 in the direction of the optical axis, CT2 represents the thickness of the second lens L2 on the optical axis, CT3 represents the third lens L3 at thickness on the optical axis;

TTL/f=1.302, wherein, TTL represents the distance on the optical axis from the object side S1 of the first lens L1 to the imaging surface S17 of the optical imaging lens 100, and f represents the effective focal length of the optical imaging lens 100;

TTL/ImgH=1.368, where TTL represents the distance on the optical axis from the object side S1 of the first lens L1 to the imaging surface S17 of the optical imaging lens 100, and ImgH represents the diagonal angle of the effective pixel area on the imaging surface S17 of the optical imaging lens 100 half the length of the line;

f5/f=0.8, where f5 represents the effective focal length of the fifth lens L5, and f represents the effective focal length of the optical imaging lens 100;

f7/f=-1.138, where f7 represents the effective focal length of the seventh lens L7, and f represents the effective focal length of the optical imaging lens.

FIG. 2 shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 according to Embodiment 1, respectively, and the reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 2 that the optical imaging lens 100 provided in Embodiment 1 can achieve good imaging quality.

Example 2

The following describes the optical imaging lens 100 of Embodiment 2 of the present application with reference to FIGS. 3 to 4 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 3 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 2 of the present application.

As shown in FIG. 3, the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is concave at the optical axis. The circumference is concave.

The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and the circumference is concave, and the image side S6 is convex at the optical axis. The circumference is convex.

The fourth lens L4 has a negative refractive power, and its object side S7 and the image side S8 are both aspherical, wherein the object side S7 is concave at the optical axis, and is concave at the circumference, and the image side S8 is concave at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 3 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 2, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 4 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 2, where the aspheric surface type can be defined by the formula (1) given in Example 1; Table 5 shows Example 2 The relevant parameter values of the optical imaging lens 100 given in .

table 3

Table 4

table 5

4 respectively shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 according to the second embodiment, and the reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 4 that the optical imaging lens 100 provided in Embodiment 2 can achieve good imaging quality.

Example 3

The following describes the optical imaging lens 100 of Embodiment 3 of the present application with reference to FIGS. 5 to 6 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 5 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 3 of the present application.

As shown in FIG. 5 , the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a negative refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is concave at the optical axis. The circumference is concave.

The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and the circumference is concave, and the image side S6 is convex at the optical axis. The circumference is convex.

The fourth lens L4 has a negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 6 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 3, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 7 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 3, where the aspheric surface type can be defined by the formula (1) given in Example 1; Table 8 shows Example 3 The relevant parameter values of the optical imaging lens 100 given in .

Table 6

Table 7

Table 8

FIG. 6 shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 according to Embodiment 3, respectively. The reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 6 that the optical imaging lens 100 provided in Embodiment 3 can achieve good imaging quality.

Example 4

The following describes the optical imaging lens 100 of Embodiment 4 of the present application with reference to FIGS. 7 to 8 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 7 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 4 of the present application.

As shown in FIG. 7, the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is concave at the optical axis. The circumference is concave.

The third lens L3 has a negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is convex at the optical axis, and is concave at the circumference, and the image side S6 is concave at the optical axis. The circumference is concave.

The fourth lens L4 has a negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 9 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 4, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 10 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 4, where the aspheric surface type can be defined by equation (1) given in Example 1; Table 11 shows Example 4 The relevant parameter values of the optical imaging lens 100 given in .

Table 9

Table 10

Table 11

FIG. 8 shows the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical imaging lens 100 of Embodiment 4, respectively, and the reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 8 that the optical imaging lens 100 given in the fourth embodiment can achieve good imaging quality.

Example 5

The optical imaging lens 100 of Embodiment 5 of the present application will be described below with reference to FIGS. 9 to 10 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 9 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 5 of the present application.

As shown in FIG. 9 , the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is concave at the optical axis. The circumference is concave.

The third lens L3 has a positive refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and is concave at the circumference, and the image side S6 is convex at the optical axis. The circumference is convex.

The fourth lens L4 has a negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 12 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 5, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 13 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 5, where the aspheric surface type can be defined by equation (1) given in Example 1; Table 14 shows Example 5 The relevant parameter values of the optical imaging lens 100 given in .

Table 12

Table 13

Table 14

FIG. 10 respectively shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical imaging lens 100 of Embodiment 5, and the reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 10 that the optical imaging lens 100 given in Embodiment 5 can achieve good imaging quality.

Example 6

The optical imaging lens 100 of Embodiment 6 of the present application will be described below with reference to FIGS. 11 to 12 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 11 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 6 of the present application.

As shown in FIG. 11 , the optical imaging lens 100 includes a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens from the object side to the image side along the optical axis. Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is convex at the optical axis. The circumference is concave.

The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and the circumference is concave, and the image side S6 is concave at the optical axis. The circumference is convex.

The fourth lens L4 has a positive refractive power, and its object side S7 and image side S8 are both aspherical, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a negative refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is concave at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 15 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 6, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 16 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 6, where the aspheric surface type can be defined by equation (1) given in Example 1; Table 17 shows Example 6 The relevant parameter values of the optical imaging lens 100 given in .

Table 15

Table 16

Table 17

FIG. 12 shows the longitudinal spherical aberration graph, astigmatism graph, and distortion graph of the optical imaging lens 100 of Embodiment 6, respectively. The reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 12 that the optical imaging lens 100 given in Embodiment 6 can achieve good imaging quality.

Example 7

The optical imaging lens 100 of Embodiment 7 of the present application will be described below with reference to FIGS. 13 to 14 . In this embodiment, descriptions similar to those in Embodiment 1 will be omitted for the sake of brevity. FIG. 13 shows a schematic structural diagram of the optical imaging lens 100 according to Embodiment 7 of the present application.

As shown in FIG. 13 , the optical imaging lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens Lens L6, seventh lens L7, and imaging surface S17.

The first lens L1 has a positive refractive power, and the object side S1 and the image side S2 are both aspherical, wherein the object side S1 is convex at the optical axis, and is convex at the circumference, and the image side S2 is concave at the optical axis. The circumference is concave.

The second lens L2 has a positive refractive power, the object side S3 and the image side S4 are both aspherical, wherein the object side S3 is convex at the optical axis, and is convex at the circumference, and the image side S4 is convex at the optical axis. The circumference is concave.

The third lens L3 has negative refractive power, the object side S5 and the image side S6 are both aspherical, wherein the object side S5 is concave at the optical axis, and the circumference is concave, and the image side S6 is convex at the optical axis. The circumference is convex.

The fourth lens L4 has a negative refractive power, and its object side S7 and image side S8 are both aspherical surfaces, wherein the object side S7 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S8 is a convex surface at the optical axis. The circumference is convex.

The fifth lens L5 has a positive refractive power, and its object side S9 and the image side S10 are both aspherical, wherein the object side S9 is a concave surface at the optical axis, a concave surface at the circumference, and the image side S10 is a convex surface at the optical axis. The circumference is convex.

The sixth lens L6 has a positive refractive power, and its object side S11 and the image side S12 are both aspherical, wherein the object side S11 is convex at the optical axis, and is concave at the circumference, and the image side S12 is concave at the optical axis. The circumference is convex.

The seventh lens L7 has a negative refractive power, and its object side surface S13 and image side surface S14 are both aspherical surfaces, wherein, the object side surface S13 is a convex surface at the optical axis, a convex surface at the circumference, and the image side surface S14 is a concave surface at the optical axis, Convex at the circumference.

The object side surface and the image side surface of the first lens L1 to the seventh lens L7 are all set as aspherical surfaces. The materials of the first lens L1 to the sixth lens L7 are all plastic. A diaphragm STO is also provided on the object side of the optical imaging lens 100 to limit the size of the incident light beam and further improve the imaging quality of the optical imaging lens 100 . The optical imaging lens 100 further includes an infrared filter 110 disposed on the image side of the seventh lens L7 and having an object side surface S15 and an image side surface S16.

Table 18 shows the surface type, curvature radius, thickness, material, refractive index, Abbe number (ie, dispersion coefficient) of each lens of the optical imaging lens 100 of Embodiment 7, and the effective focal length of each lens, wherein the curvature radius, The unit of thickness and effective focal length of each lens is millimeter (mm). Table 19 shows the higher order coefficients that can be used for the lens aspheric surfaces S1-S14 in Example 7, where the aspheric surface type can be defined by equation (1) given in Example 1; Table 20 shows Example 7 The relevant parameter values of the optical imaging lens 100 given in .

Table 18

Table 19

Table 20

FIG. 14 shows the longitudinal spherical aberration graph, astigmatism graph, and distortion graph of the optical imaging lens 100 of Embodiment 7, respectively. The reference wavelength of the optical imaging lens 100 is 555 nm. The longitudinal spherical aberration graph shows the focus point deviation of light with wavelengths of 470 nm, 510 nm, 555 nm, 610 nm and 650 nm after passing through the optical imaging lens 100 ; the astigmatism graph shows that the light with wavelength 555 nm passes through the optical imaging lens 100 . The posterior meridional image plane curvature and the sagittal image plane curvature; the distortion graph shows the distortion of the light with a wavelength of 555 nm after passing through the optical imaging lens 100 at different image heights. It can be seen from FIG. 14 that the optical imaging lens 100 given in the seventh embodiment can achieve good imaging quality.

As shown in FIG. 15 , the present application further provides an imaging module 200 , which includes the optical imaging lens 100 (as shown in FIG. 1 ) as described above; On the image side, the photosensitive surface of the photosensitive element 210 coincides with the imaging surface S17. Specifically, the photosensitive element 210 may use a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensor or a charge coupled device (CCD, Charge-coupled Device) image sensor.

The imaging module 200 can use the aforementioned optical imaging lens 100 to capture images with high pixels and wide viewing angles, and at the same time, the imaging module 200 also has the characteristics of miniaturization and light weight. The imaging module 200 can be applied to fields such as mobile phones, automobiles, monitoring, and medical treatment. Specifically, it can be used as a mobile phone camera, a car camera, a surveillance camera or an endoscope.

The present application also provides an electronic device, including a housing and the imaging module 200 as described above, where the imaging module 200 is mounted on the housing. Specifically, the imaging module 200 is disposed in the casing and exposed from the casing to obtain images. The casing can provide the imaging module 200 with protection from dust, water, and drop. The casing is provided with a corresponding imaging module 200. holes to allow light to pass through or out of the housing.

The aforementioned electronic device can capture images with a wide viewing angle and high pixels by using the aforementioned imaging module 200, thereby improving the user's shooting experience.

In other embodiments, the term "electronic device" may also include, but is not limited to, a device configured to be connected via a wired line and/or to receive or transmit communication signals via a wireless interface. An electronic device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communication capabilities; may include radio telephones, pagers, Internet/ Personal digital assistant (PDA) for intranet access, web browser, memo pad, calendar, and/or global positioning system (GPS) receiver; and conventional laptop and/or palmtop reception transceiver or other electronic device including a radiotelephone transceiver.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present utility model, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (12)

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

a diaphragm;

the optical lens comprises a first lens element with positive refractive power, and a second lens element with positive refractive power, wherein the object-side surface of the first lens element is convex at the paraxial region;

a second lens element with refractive power;

a third lens element with refractive power;

a fourth lens element with refractive power;

the fifth lens element with positive refractive power has a convex image-side surface at a paraxial region;

a sixth lens element with refractive power; and the number of the first and second groups,

the seventh lens element with negative refractive power has a concave image-side surface at the paraxial region;

the optical imaging lens satisfies the following relational expression:

(SAG51+SAG52)/(SAG61+SAG62)≤1；

SAG51 represents a distance in the optical axis direction from the intersection point of the object side surface of the fifth lens and the optical axis to the maximum effective aperture of the object side surface of the fifth lens, SAG52 represents a distance in the optical axis direction from the intersection point of the image side surface of the fifth lens and the optical axis to the maximum effective aperture of the image side surface of the fifth lens, SAG61 represents a distance in the optical axis direction from the intersection point of the object side surface of the sixth lens and the optical axis to the maximum effective aperture of the object side surface of the sixth lens, and SAG62 represents a distance in the optical axis direction from the intersection point of the image side surface of the sixth lens and the optical axis to the maximum effective aperture of the image side surface of the sixth lens.

2. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

∑ETA/TTL≤0.5；

Σ ETA represents the sum of distances in the optical axis direction from the maximum effective aperture of the image side surface of the preceding lens to the maximum effective aperture of the object side surface of the subsequent lens in each of the adjacent lenses of the first lens to the seventh lens, and TTL represents the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens.

3. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

3mm/deg≤100*∑CT/FOV≤5mm/deg；

wherein Σ CT represents the sum of thicknesses of the respective lenses of the first lens to the seventh lens on the optical axis, and FOV represents the field angle in the diagonal direction of the optical imaging lens.

4. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

0≤Y61-Y52≤0.5mm；

wherein Y52 represents the maximum effective aperture of the image-side surface of the fifth lens, and Y61 represents the maximum effective aperture of the object-side surface of the sixth lens.

5. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

1≤(CT6+CT7)/CT5≤2；

wherein CT5 denotes a thickness of the fifth lens on an optical axis, CT6 denotes a thickness of the sixth lens on an optical axis, and CT7 denotes a thickness of the seventh lens on an optical axis.

6. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

(ET2+ET3)/(CT2+CT3)≤1.5；

wherein ET2 represents a distance in an optical axis direction from a maximum effective aperture of an object-side surface of the second lens to a maximum effective aperture of an image-side surface thereof, ET3 represents a distance in the optical axis direction from a maximum effective aperture of an object-side surface of the third lens to a maximum effective aperture of an image-side surface thereof, CT2 represents a thickness of the second lens in the optical axis, and CT3 represents a thickness of the third lens in the optical axis.

7. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

1≤TTL/f≤1.5；

wherein, TTL represents a distance on an optical axis from an object side surface of the first lens element to an imaging surface of the optical imaging lens, and f represents an effective focal length of the optical imaging lens.

8. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

1≤TTL/ImgH≤2；

wherein, TTL represents a distance on an optical axis from an object side surface of the first lens element to an imaging surface of the optical imaging lens, and ImgH represents a half of a diagonal length of an effective pixel area on the imaging surface of the optical imaging lens.

9. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

0.5≤f5/f≤1.5；

wherein f5 denotes an effective focal length of the fifth lens, and f denotes an effective focal length of the optical imaging lens.

10. The optical imaging lens according to claim 1, wherein the optical imaging lens satisfies the following relation:

-2≤f7/f＜0；

wherein f7 denotes an effective focal length of the seventh lens, and f denotes an effective focal length of the optical imaging lens.

11. An imaging module comprising the optical imaging lens according to any one of claims 1 to 10 and a photosensitive element, wherein the photosensitive element is disposed on an image side of the optical imaging lens.

12. An electronic device comprising a housing and the imaging module of claim 11, wherein the imaging module is mounted on the housing.

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