CN112526708B

CN112526708B - Camera optical lens, camera module and electronic equipment

Info

Publication number: CN112526708B
Application number: CN201911399722.8A
Authority: CN
Inventors: 王伟; 叶海水; 居远道
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-19
Filing date: 2019-12-30
Publication date: 2022-12-30
Anticipated expiration: 2039-12-30
Also published as: CN112526708A

Abstract

The present application provides an image pickup optical lens, sequentially including from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element; the imaging optical lens satisfies the following relation: f is more than or equal to 1.8 and less than or equal to 1.9; TTL/EPD is more than or equal to 2.0 and less than or equal to 2.1; TTL/ImgH is more than or equal to 1.0 and less than or equal to 1.25; wherein, F is the diaphragm of the camera optical lens, EPD is the entrance pupil aperture of the camera optical lens, TTL is the total optical length of the camera optical lens, and ImgH is the maximum image height of the camera optical lens. The application provides a make a video recording optical lens, camera module and electronic equipment, aim at is guaranteeing to make a video recording under optical lens's performance's the prerequisite, reduces optical lens's that makes a video recording occupation space.

Description

Camera optical lens, camera module and electronic equipment

The present application claims priority from chinese patent application filed in 2019, 19/9 under the heading of china patent office under the application number 201910888034.1 entitled "imaging optical lens, camera module, and electronic device," the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of optical lenses, and more particularly, to an imaging optical lens, a camera module, and an electronic apparatus.

Background

With the development of electronic device technology and the demand for consumer diversification, the image pickup function has become an important feature of the electronic device and a main index for evaluating the performance of the electronic device. In addition, electronic devices tend to be thin and light, and thus the market demand for compact cameras with good image quality is increasing.

In order to obtain better imaging quality, a conventional imaging optical lens generally adopts a four-piece or five-piece lens structure. With the continuous reduction of the pixels of the photosensitive elements, the six-piece and seven-piece lens structures begin to appear, and the overall thickness of the shooting optical lens is increased continuously, which is not beneficial to realizing the miniaturization of the shooting optical lens. Therefore, it is necessary to design an optical imaging lens that can achieve high imaging performance and has the characteristics of small occupied space and compact structure.

Disclosure of Invention

The application provides a make a video recording optical lens, camera module and electronic equipment, aim at is guaranteeing to make a video recording under optical lens's performance's the prerequisite, reduces optical lens's that makes a video recording occupation space.

In a first aspect, an imaging optical lens is provided, in order from an object side to an image side, comprising: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element; the imaging optical lens satisfies the following relational expression: f is more than or equal to 1.8 and less than or equal to 1.9; and TTL/EPD is more than or equal to 2.0 and less than or equal to 2.1; and TTL/ImgH is more than or equal to 1.0 and less than or equal to 1.25; wherein F is the diaphragm of the shooting optical lens, EPD is the entrance pupil aperture of the shooting optical lens, TTL is the total optical length of the shooting optical lens, and ImgH is the maximum image height of the shooting optical lens.

When the aperture, the total optical length, the entrance pupil aperture, the total optical length and the maximum image height of the imaging optical lens meet the relational expression, the imaging optical lens can meet the requirement of small total optical length while obtaining high imaging performance.

Specifically, the above relation defines the range of the ratio of the effective focal length to the total optical length (i.e. the aperture) of the imaging optical lens, which is advantageous for scaling with the same optical system architecture. Moreover, under the condition that the entrance pupil aperture is fixed, the effective focal length EFL of the image pickup optical lens 300 is less than twice of that of the EPD, which is beneficial to realizing the large aperture design of the optical system.

The above relational expression defines a range of a ratio of the total optical length to the entrance pupil aperture of the imaging optical lens. Under the condition that the aperture of the entrance pupil is fixed, the total optical length can be shortened, the total thickness of the shooting optical lens is reduced, and the occupied space of the shooting optical lens is reduced.

The above relational expression defines a range of a ratio of the total optical length of the imaging optical lens to the maximum image height. Under the condition that the size of the image sensor is fixed, the total optical length can be shortened, the total thickness of the shooting optical lens is reduced, and the occupied space of the shooting optical lens is reduced.

Optionally, the image pickup optical lens satisfies: TTL/ImgH is more than or equal to 1.18 and less than or equal to 1.21.

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: LT/TTL is more than or equal to 0.85 and less than or equal to 0.90, wherein LT is the farthest distance between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis.

The above relation specifies a range of a ratio of a maximum distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens to the total optical length. Under the condition that the total thickness of the image pickup optical lens is certain, a movable space needs to be reserved for the image pickup optical lens, and the diversity of the position relation among different lenses is improved, so that the working focal length range of the image pickup optical lens can be widened under the condition that the occupied space of the image pickup optical lens is certain.

Optionally, the image pickup optical lens satisfies: LT/TTL is more than or equal to 0.87 and less than or equal to 0.88.

In the embodiment of the present application, a lens is taken as a boundary, a side where a subject is located is an object side, and a surface of the lens facing the object side may be referred to as an object side surface; the side of the lens where the image of the object is located is the image side, and the surface of the lens facing the image side may be referred to as the image side surface.

In addition, the positive and negative of the curvature radius indicate that the optical surface is convex toward the object side or convex toward the image side, and when the optical surface (including the object side surface or the image side surface) is convex toward the object side, the curvature radius of the optical surface is a positive value; when the optical surface (including the object side surface or the image side surface) is convex toward the image side, the optical surface is concave toward the object side, and the radius of curvature of the optical surface is negative.

With reference to the first aspect, in certain implementations of the first aspect, the first lens satisfies: and | EFL/Φ 1| of more than or equal to 0.7 and less than or equal to 0.80, wherein Φ 1 is the focal power of the first lens, and EFL is the effective focal length of the photographic optical lens.

Optionally, the first lens satisfies: the absolute EFL/phi 1 is more than or equal to 0.76 and less than or equal to 0.79.

With reference to the first aspect, in certain implementations of the first aspect, the second lens satisfies: and (R21 + R22)/(R21-R22) is not more than 5.0 and not more than 6.5, wherein R21 is the curvature radius of the object side surface of the second lens, and R22 is the curvature radius of the image side surface of the second lens.

The above relation defines a range of a ratio of a radius of curvature of the object-side surface to a radius of curvature of the image-side surface of the second lens, which is advantageous for reducing system tolerance sensitivity.

Optionally, the second lens satisfies: 5.5 is less than or equal to (R21 + R22)/(R21-R22) is less than or equal to 6.0.

With reference to the first aspect, in certain implementations of the first aspect, the image-side surface of the third lens is convex at a paraxial region and includes at least three points of inflection.

The object side surface of the third lens is a convex surface close to the optical axis, so that the comprehensive aberration of the shooting optical lens can be balanced.

The object side surface of the third lens and/or the image side surface of the third lens comprise at least three inflection points, so that the principal point of the shooting optical lens can move towards the object space, and the effective focal length and the total thickness of the shooting optical lens can be effectively shortened.

With reference to the first aspect, in certain implementations of the first aspect, the fifth lens satisfies: and the EFL/R51 + EFL/R52 is not less than 0.5 and not more than 2.0, wherein EFL is the effective focal length of the image pickup optical lens, R51 is the curvature radius of the object side surface of the fifth lens, and R52 is the curvature radius of the image side surface of the fifth lens.

The above relation defines a range of a ratio of a curvature radius of the object-side surface to a curvature radius of the image-side surface of the fifth lens, which is advantageous for scaling under the same optical system architecture.

Optionally, the fifth lens satisfies: the absolute EFL/R51 and the absolute EFL/R52 are more than or equal to 0.8 and less than or equal to 1.3.

With reference to the first aspect, in certain implementations of the first aspect, the sixth lens satisfies: and | EFL/phi 6| is more than or equal to 0.40 and less than or equal to 0.60, wherein EFL is the effective focal length of the photographic optical lens, and phi 6 is the focal power of the sixth lens.

Optionally, the sixth lens satisfies: the absolute EFL/phi 6 is more than or equal to 0.44 and less than or equal to 0.52.

With reference to the first aspect, in certain implementations of the first aspect, the sixth lens satisfies: and the EFL/R61 + EFL/R62 is not less than 1.5 and not more than 2.3, wherein EFL is the effective focal length of the image pickup optical lens, R61 is the curvature radius of the object side surface of the sixth lens, and R62 is the curvature radius of the image side surface of the sixth lens.

The above relation defines a range of a ratio of a curvature radius of the object-side surface of the sixth lens element to a curvature radius of the image-side surface of the sixth lens element, which is advantageous for scaling when the optical system has the same structure.

Optionally, the sixth lens satisfies: the absolute EFL/R61 and the absolute EFL/R62 are more than or equal to 1.85 and less than or equal to 2.05.

With reference to the first aspect, in certain implementations of the first aspect, the object-side surface of the seventh lens element is concave at a paraxial region and includes at least three inflection points, and/or the image-side surface of the seventh lens element is concave at a paraxial region and includes at least three inflection points.

The object side surface of the seventh lens and/or the image side surface of the seventh lens comprise at least three inflection points, so that the principal point of the shooting optical lens can be moved towards the object space, and the effective focal length and the total thickness of the shooting optical lens can be effectively shortened.

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: 2 is less than or equal to (TTL) ² /(EPD×ImgH)≤2.7。

Through proper parameter combination, high-performance images can be obtained on a large-size image sensor, and the shooting optical lens has the characteristics of large aperture and compact structure.

Optionally, the image pickup optical lens satisfies: 2.4 ≤ (TTL) ² /(EPD×ImgH)≤2.5。

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: nmax is more than or equal to 1.65 and less than or equal to 1.70, and Nmin is more than or equal to 1.50 and less than or equal to 1.58; wherein Nmax is a maximum refractive index of the image pickup optical lens, and Nmin is a minimum refractive index of the image pickup optical lens.

The maximum refractive index of the image pickup optical lens refers to the refractive index of a lens with the maximum refractive index in the image pickup optical lens; the minimum refractive index of the imaging optical lens is a refractive index of a lens having the smallest refractive index among the imaging optical lenses.

Through reasonable collocation of the refractive indexes of different lenses, the comprehensive aberration of the lens group can be improved, and the miniaturization of the lens group is favorably realized.

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: vmin is more than or equal to 15 and less than or equal to 20, and Vmax is more than or equal to 55 and less than or equal to 60, wherein Vmax is the maximum dispersion coefficient of the photographic optical lens, and Vmin is the minimum dispersion coefficient of the photographic optical lens.

The maximum dispersion coefficient of the image pickup optical lens refers to the dispersion coefficient of a lens with the maximum dispersion coefficient in the image pickup optical lens; the minimum dispersion coefficient of the imaging optical lens is the dispersion coefficient of the lens having the smallest dispersion coefficient in the imaging optical lens. By reasonably matching the dispersion coefficients of different lenses, the comprehensive aberration of the lens group can be improved, and the miniaturization of the lens group is favorably realized.

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: 3.5> CT6/CT2>2.0, and, 4.0> CT6/CT4>2.0, and, 2.5> -CT6/CT 5>2.0, and, 2.0> -CT6/CT 1>1.2, and, 2.0> -CT6/CT 3>1.2, and, 3.0> -CT6/CT 7>1.2; wherein CT1 is a thickness of the first lens on the optical axis, CT2 is a thickness of the second lens on the optical axis, CT3 is a thickness of the third lens on the optical axis, CT4 is a thickness of the fourth lens on the optical axis, CT5 is a thickness of the fifth lens on the optical axis, CT6 is a thickness of the sixth lens on the optical axis, and CT7 is a thickness of the seventh lens on the optical axis.

The optimal balance between the miniaturization of the lens group and the manufacturability of the lens can be obtained by reasonably configuring the thicknesses of different lenses.

Optionally, the image pickup optical lens satisfies: 2.9> CT6/CT2>2.7, and, 3.2> CT6/CT4>2.5, and, 2.4> -CT6/CT 5>2.2, and, 1.6> -CT6/CT 1>1.4, and, 1.6> -CT6/CT 3>1.4, and, 2.2> -CT6/CT 7>1.5.

With reference to the first aspect, in certain implementations of the first aspect, the image pickup optical lens satisfies: 1.0< -LD11/LD 31<1.3, wherein LD11 is the maximum optical effective diameter of the object side surface of the first lens, and LD31 is the maximum optical effective diameter of the object side surface of the third lens.

By restricting the maximum optical effective diameters of the first lens and the third lens, the aperture of the front end of the lens group can be reduced, thereby reducing the opening of the front end.

In a second aspect, a camera module is provided, which includes a motor and the image pickup optical lens in the first aspect or any one of the possible implementation manners of the first aspect, where the motor is configured to drive the image pickup optical lens to perform focusing and/or optical anti-shake.

In a third aspect, an electronic device is provided, which includes a processor and the camera module in the second aspect, where the camera module is configured to acquire image data and input the image data into the processor, so that the processor processes the image data.

Drawings

Fig. 1 is a schematic diagram of an electronic device.

Fig. 2 is an exploded view of a camera module according to an embodiment of the present application.

Fig. 3 is a schematic configuration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 4 is a schematic lens view of an embodiment of the present application.

Fig. 5 is a schematic axial chromatic aberration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 6 is a schematic view of vertical axis chromatic aberration of an imaging optical lens according to an embodiment of the present application.

Fig. 7 is a schematic diagram of optical distortion of an imaging optical lens according to an embodiment of the present application.

Fig. 8 is an astigmatism diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 9 is a schematic configuration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 10 is a schematic axial chromatic aberration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 11 is a schematic view of vertical axis chromatic aberration of an imaging optical lens according to an embodiment of the present application.

Fig. 12 is a schematic diagram of optical distortion of an imaging optical lens according to an embodiment of the present application.

Fig. 13 is a schematic view of astigmatism of an image pickup optical lens according to an embodiment of the present application.

Fig. 14 is a schematic configuration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 15 is a schematic axial chromatic aberration diagram of an imaging optical lens according to an embodiment of the present application.

Fig. 16 is a schematic view of vertical axis chromatic aberration of an imaging optical lens according to an embodiment of the present application.

Fig. 17 is a schematic view of optical distortion of an imaging optical lens according to an embodiment of the present application.

Fig. 18 is a schematic view of astigmatism of an image pickup optical lens according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

For the convenience of understanding, technical terms related to the present application are explained and described below.

Focal length (focal length), also known as focal length, is a measure of the concentration or divergence of light in an optical system, and refers to the perpendicular distance from the optical center of a lens or lens group to the focal plane when an infinite scene is imaged sharply at the focal plane through the lens or lens group. From a practical point of view it can be understood as the distance from the lens center to the film plane. For a fixed-focus lens, the position of the optical center is fixed and unchanged; for a zoom lens, a change in the optical center of the lens results in a change in the focal length of the lens.

The Effective Focal Length (EFL) is the distance from the center of the lens to the focal point.

The aperture, which is a device for controlling the amount of light transmitted through the lens and into the light-sensing surface in the body, is typically located within the lens. The expressed aperture size is expressed in F/number.

The F-number is a relative value (reciprocal of relative aperture) obtained by the focal length of the lens/the lens light-passing diameter. The smaller the F value of the aperture, the more the amount of light entering the same unit time. The larger the F value of the aperture is, the smaller the depth of field is, and the background content of the shot will be blurred, similar to the effect of a telephoto lens.

The relative aperture, equal to the focal length of the lens divided by the entrance pupil diameter.

Positive refractive power, which may also be referred to as positive refractive power, indicates that the lens has a positive focal length and has the effect of converging light.

Negative refractive power, which may also be referred to as negative refractive power, indicates that the lens has a negative focal length and has a divergent light effect.

Total Track Length (TTL), which refers to the total length from the lens barrel head to the imaging surface, is a major factor in forming the height of the camera.

The focal ratio F #, the focal length divided by the aperture size, and the value of the focal length divided by the aperture size can be used to determine the light input amount of the optical system.

The abbe number, also called abbe number, is the difference ratio of refractive indexes of an optical material at different wavelengths, and represents the dispersion degree of the material.

A field of view (FOV) is an angle of view formed by two edges of an optical instrument, at which an object image of a measurement target can pass through the maximum range of a lens, with the lens of the optical instrument as a vertex. The size of the field angle determines the field range of the optical instrument, and the larger the field angle, the larger the field of view, and the smaller the optical magnification.

The optical axis is a ray passing perpendicularly through the center of the ideal lens. When light rays parallel to the optical axis enter the convex lens, the ideal convex lens is that all the light rays converge at a point behind the lens, and the point where all the light rays converge is the focal point.

The object space is defined by the lens, and the space where the object is located is the object space.

The image space is defined by the lens, and the space where the light emitted by the object passes through the lens to form an image behind the lens is the image space.

The surface of the lens close to the object side can be called an object side surface; the side of the lens on which the image of the object is located is the image side, and the surface of the lens close to the image side can be referred to as the image side surface.

The focal power, also known as diopter, is equal to the difference between the image and object beam convergence, and characterizes the ability of the optical system to deflect light. The focal power of the convex lens is positive and the focal power of the concave lens is negative.

Stop, refers to the edge, frame or specially provided perforated barrier of the optical elements in the optical train assembly used to limit the size of the imaging beam or the unit of imaging space.

The diaphragm is used for limiting the maximum inclination angle of marginal rays in the on-axis point imaging light beam, namely the diaphragm with the minimum incident aperture angle.

The entrance pupil is the common entrance for the beams from all points on the object plane. Also referred to as entrance pupils. The entrance pupil diameter is the diameter of the entrance pupil. The entrance pupil diameter may represent the amount of light that the eye can see from the eyepiece.

The exit pupil is the common exit of the last pupil from each point on the object plane after the light beam from the point passes through the whole optical system.

Chromatic aberration (also called chromatic aberration), which is a serious defect of lens imaging, can be understood as aberration caused by different refractive indexes of various colored lights, the wavelength range of visible light is about 400 to 700 nm, light with different wavelengths has different colors, and the refractive indexes of the light passing through a lens are different, so that a point in an object space can form a color spot in the image space.

Axial chromatic aberration, also known as longitudinal chromatic aberration or positional chromatic aberration or axial aberration, is the difference between the longitudinal chromatic aberration or axial chromatic aberration, in which a beam of light parallel to the optical axis converges at different positions before and after passing through the lens. The reason is that the positions of the lens for imaging the light with various wavelengths are different, so that the focal planes of the images of the light with different colors cannot be overlapped during final imaging, and the polychromatic light is scattered to form dispersion.

The lateral chromatic aberration is also called magnification chromatic aberration and vertical axis chromatic aberration, and the difference of the magnification of the optical system to different colored lights is called magnification chromatic aberration. The wavelength causes a change in the magnification of the optical system, with a consequent change in the size of the image.

Distortion (distortion), also known as distortion, is the degree to which an image made by an optical system on an object is distorted relative to the object itself. The distortion is caused by the influence of the spherical aberration of the diaphragm, the height of the intersection point of the principal rays of different view fields and the Gaussian image surface after passing through the optical system is not equal to the ideal image height, and the difference between the principal rays and the Gaussian image surface is the distortion. Therefore, the distortion only changes the imaging position of the off-axis object point on the ideal plane, so that the shape of the image is distorted, but the definition of the image is not influenced.

Optical distortion (optical distortion) refers to the degree of deformation that is calculated optically.

The meridian plane is a plane formed by a principal ray emitted from an object point located outside the principal axis of the optical system and the principal axis of the optical system. Rays lying in a meridian plane are collectively referred to as a meridian beam. The point formed by the meridional beams is called a meridional image point. The image plane where the meridional image points are located is called a meridional image plane. The sagittal plane is a plane passing through a principal ray emitted from an object point located outside the principal axis of the optical system and perpendicular to the meridian plane. Rays lying in the sagittal plane are collectively referred to as the sagittal light beam. The point formed by the sagittal light beam is called the sagittal image point. The image plane in which the sagittal image points are located is called the sagittal image plane. The light beam emitted by the light-emitting object point has an inclined angle with the optical axis because the light-emitting object point is not on the optical axis of the optical system. After the light beam is refracted by the lens, the meridional light beam and the sagittal light beam cannot converge on the same point. The phenomenon that results in image blurring is therefore called astigmatism.

Diffraction limit (diffraction limit) means that an ideal object point is imaged by an optical system, and due to the diffraction limit, it is impossible to obtain the ideal image point, but a fraunhofer diffraction image is obtained. Since the aperture of a general optical system is circular, the images of the Francis and Fisher diffraction are called Airy spots. Therefore, each object point is like a diffuse spot, two diffuse spots are not well distinguished after being close to each other, the resolution ratio of the system is limited, and the larger the spot is, the lower the resolution ratio is.

The maximum optical effective diameter refers to the maximum diameter of the lens for passing light. The parameters of the lens may include a maximum optically effective diameter of the object side surface, and a maximum optically effective diameter of the image side surface.

Fig. 1 shows a schematic view of an electronic device. As shown in fig. 1, the electronic device 100 is equipped with a camera module 110 and/or a camera module 120, and the

camera module

110 or 120 includes the camera optical lens 300 (not shown in the figure) according to the embodiment of the present disclosure.

The electronic device 100 may be an electronic device with a camera function, such as a mobile phone, a smart phone, a tablet computer, a laptop computer, a video camera, a video recorder, a camera, or other devices with camera function. For convenience of understanding, the embodiment of the present application is described by taking the electronic device 100 as a mobile phone as an example.

When the electronic device 100 is a mobile phone, a camera module (CCM) may be disposed on both the front and back surfaces, or only the front or back surface may be disposed with a camera module. As shown in fig. 1, the left image is the front of the mobile phone, and the camera module 110 is installed on the left image, so that the mobile phone can be used for self-shooting and can also be used for shooting other objects by a photographer. The right picture in fig. 1 is the back of the mobile phone, and the camera module 120 is installed at the upper left part of the mobile phone, and can be used for shooting surrounding scenes and also can be used for self-shooting.

It should be understood that the installation positions of the camera module 110 and the camera module 120 are only illustrative, and in some other embodiments, the

camera modules

110 and 120 may be installed at other positions on the mobile phone, for example, the camera module 110 may be installed at the left side of the handset or at the middle position of the upper portion of the mobile phone, the camera module 120 may be installed at the middle or upper right corner of the back of the mobile phone, and the

camera module

110 or 120 may also be installed on a component that is movable or rotatable relative to the mobile phone instead of the mobile phone main body, for example, the component may extend out, retract, or rotate from the mobile phone main body, and the application does not limit the installation positions of the camera modules.

It should also be understood that the number of the camera modules 110 and the camera modules 120 is not limited to one, and may be two or more, for example, the electronic device 100 may mount two camera modules 120 on the back side. The installation number of the camera modules is not limited.

The

camera modules

110 and 120 can be used for shooting external videos or photos, can be used for shooting scenes at different distances, for example, the camera modules can be used for shooting far scenes, can be used for shooting near scenes, and can also be used for shooting macro scenes. The

camera modules

110 and 120 may also be used for self-photographing, and the camera module 120 shown in the figure and located on the back of the mobile phone may also be used for a front camera, and the like, which is not limited in this embodiment.

It should be understood that other components, such as a headphone, a key, a sensor, and the like, may also be disposed on the electronic device 100 shown in fig. 1, and the embodiment of the present application only exemplifies an electronic device mounted with a camera module, but the components mounted on the electronic device 100 are not limited thereto.

Fig. 2 shows an exploded view of the camera module 200, and the camera module 200 may be the camera module 110 or the camera module 120 shown in fig. 1, and the structure of the camera module is described below with reference to fig. 2.

The camera module 200 may include an optical lens (lens) 210, an image sensor (sensor) 220, an analog-to-digital converter (a/D converter) 230, an image processor 240, a memory 250, and the like.

Taking the electronic device 100 as a mobile phone as an example, the camera module 200 may operate according to a principle that a light ray L reflected by a scene object generates an optical image through an optical lens (lens) 210 and projects the optical image onto the surface of the image sensor 220. The optical image may be converted into an electrical signal, i.e., an analog image signal S1, and the analog image signal S1 may be converted into a digital image signal S2 by an analog-to-digital converter a/D230. The digital image signal S2 may be converted into a compressed image signal S3 through a processing process of an image processor 240, such as a Digital Signal Processing (DSP). The compressed image signal S3 may be stored in the memory 250 and finally displayed on the display screen.

The optical lens 210 is a key component that affects the imaging quality and the imaging effect. The optical crystal 210 is primarily imaged using the principle of lens refraction, i.e., light rays emanating from a scene can pass through the lens and be focused in a focal plane, thereby forming a sharp image of the scene. And then recording the image on the focusing plane through a photosensitive material or a photoreceptor, so that the appearance of the scenery can be recorded. The lens may be an integral body formed by combining a plurality of lenses (glasses lenses). The lens material may be resin (resin), plastic (plastic), glass (glass). The lens comprises a spherical lens and an aspherical lens. The lens can be a fixed focal length lens or a zoom lens, and can also be a standard lens, a short-focus lens or a long-focus lens.

The image sensor 220 is a semiconductor chip having a surface comprising hundreds of thousands to millions of photodiodes that generate electric charges when exposed to light. The analog-to-digital converter chip may convert the electrical signal to a digital signal. The image sensor 220 may be a Charge Coupled Device (CCD) or a complementary metal-oxide semiconductor (CMOS). The CCD is made of a semiconductor material having high sensitivity. There are many photosites on a CCD, which is typically in mega pixels. When the CCD surface is irradiated by light, each photosensitive unit feeds back a charge value, and signals generated by all the photosensitive units are added together to form a complete picture. The CMOS is mainly made of two elements of silicon and germanium, so that N (charged-electric) and P (charged-electric) semiconductors coexist on the CMOS, and the current generated by the two complementary effects can be recorded and imaged by a processing chip.

The function of the image processor 240 is to optimize the digital image signal through a series of complex mathematical algorithm operations, and finally transmit the processed signal to the display. The image processor 240 may be an image processing chip or a digital signal processing chip (DSP), and functions to transfer data obtained by the photosensitive chip to the central processor in a timely and quick manner and refresh the photosensitive chip.

The camera module 200 may further include a holder, an auto-focus driving module, an infrared-cut filter (IRCF), a circuit board, a connector, and peripheral electronic components (not shown). The fixer can come fixed camera lens, can also be provided with an infrared filter on the fixer in addition, and unnecessary light on image sensor 220 can be eliminated to the infrared filter, prevents that image sensor 220 from producing false color or ripple to improve its effective resolution and colored reducibility. The auto-focus driving assembly may include a voice coil motor, a driving integrated circuit, etc. for auto-focusing or optically anti-shake of the lens. The circuit board may be a Flexible Printed Circuit (FPC) or a Printed Circuit Board (PCB) for transmitting an electrical signal, wherein the FPC may be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board, a rigid flexible board, a hybrid-structured flexible circuit board, or the like. Other components included in the camera module 200 are not described in detail herein.

It should be understood that the "lens" described in the embodiments of the present application may be understood as an integral lens, and may include one or more lenses, and the "lens" or "optic" may be understood as a lens in a lens structure or a lens or optic used to constitute the lens.

As mentioned above, in the optical system, the lens affects the imaging quality, and a key index of the lens is the F-stop value, which directly affects the core functions of the camera, such as night scene, capture, background blurring, video, etc. The large aperture/super large aperture can be the main trend of the mobile phone camera because the virtual background of the picture can be increased and the main body can be highlighted when the large aperture (the aperture F value is smaller) lens is used for shooting, the shutter speed and the focusing speed can be improved, and the imaging quality is better. The existing lens imaging structure is mostly formed by 5-piece or 6-piece plastic lenses, and the minimum F value of the aperture is 1.5. In addition, as the mobile phone is developed to be light and thin, the demand for miniaturization of the camera is increasing, and good imaging quality is also required. To obtain better imaging quality, the size and pixels of the photosensitive element can be increased, but the height of the camera module is also increased.

Therefore, it is necessary to design an imaging optical lens that can satisfy the requirements of a large aperture and a small total optical length while ensuring high imaging performance.

It should be noted that the large aperture in the embodiment of the present application may be understood as an aperture with an F value smaller than 2, and the extra-large aperture may be understood as an aperture with an F value smaller than 1.5.

Fig. 3 shows a schematic configuration diagram of an imaging optical lens 300 according to an embodiment of the present application. The image pickup optical lens 300 according to the embodiment of the present application may be the optical lens 210 in the camera module 200 of fig. 2.

As shown in fig. 3, an imaging optical lens 300 according to an embodiment of the present application includes 7 lenses. For convenience of description, the left side of the image capturing optical lens 300 is defined as the object side (hereinafter also referred to as the object side), the surface of the lens facing the object side can be referred to as the object side surface, the surface of the lens facing the object side can be referred to as the surface of the lens close to the object side, the right side of the image capturing optical lens 300 is defined as the image side (hereinafter also referred to as the image side), the surface of the lens facing the image side can be referred to as the image side surface, and the image side surface can be referred to as the surface of the lens close to the image side. The imaging optical lens 300 according to the embodiment of the present application includes, in order from an object side to an image side: a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, a fifth lens 305, a sixth lens 306, and a seventh lens 307.

Optionally, a stop 310 may be further disposed before the first lens 301.

Optionally, an image sensor 309, such as a CCD, CMOS, etc., may be disposed after the seventh lens 307.

Optionally, a filter 308, such as a flat panel infrared cut filter, may be further disposed between the seventh lens 307 and the image sensor 309.

In an imaging system composed of multiple lenses, different combinations of lenses (e.g., order of lenses arranged along an optical path, lens material, refractive index, shape curvature, etc.) bring different optical properties and control light entering the optical system. In the embodiment of the present application, the image capturing optical lens 300 includes 7 lenses, wherein the first lens 301 mainly functions as a positive lens to condense light, the second lens 302 mainly functions as a negative lens to diverge light, and the third lens 303 mainly functions as a positive lens to condense light again, so that the first lens 301, the second lens 302, and the third lens 303 can reduce chromatic aberration of the system by combining different dispersion coefficients. In addition, the fourth lens 304 and the fifth lens 305 can spread light rays to a larger range, and the sixth lens 306 and the seventh lens 307 can correct curvature of field, distortion, high-order aberration and the like of the system. The image pickup optical lens 300 is described in detail below.

It should be noted that, for convenience of understanding and description, the embodiment of the present application defines the representation form of the relevant parameters of the image pickup optical lens 300, for example, EFL is used to represent the effective focal length of the image pickup optical lens 300, Φ 1 is used to represent the focal length of the first lens 301, and the like, and the letter representation of similar definitions is only schematic, and may of course be represented by other forms, and the present application is not limited in any way.

It should also be noted that the units of the parameters related to the ratio in the following relations are kept consistent, for example, the units of numerator are millimeters (mm), and the units of denominator are also millimeters.

The imaging optical lens 300 of the present embodiment includes, in order from an object side to an image side:

a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, a fifth lens 305, a sixth lens 306, and a seventh lens 307.

The imaging optical lens 300 satisfies the following relational expression:

1.8≤F≤1.9；

2.0≤TTL/EPD≤2.1；

1.0≤TTL/ImgH≤1.25；

where F is an aperture of the photographing optical lens 300, EPD (entry pupil diameter) is an entrance pupil diameter of the photographing optical lens 300, TTL is a total optical length of the photographing optical lens 300, and ImgH is a maximum image height of the photographing optical lens 300. The maximum image height of the image-taking optical lens 300 can be generally represented by the diagonal length of the image sensor 309. The EFL/EPD may also be referred to as the F-stop value of the imaging optical lens 300, i.e., F may be equal or approximately equal to EFL/EPD.

It should be understood that the effective focal length of the image pickup optical lens 300 can be understood as an effective focal length when the lens included in the image pickup optical lens 300 is regarded as one optical lens.

The above relation specifies that the range of the ratio of the effective focal length to the entrance pupil aperture of the image pickup optical lens 300 is 1.8 or more and 1.9 or less, which is beneficial to scaling under the condition of the same optical system architecture. Moreover, under the condition that the aperture of the entrance pupil is fixed, the effective focal length EFL of the imaging optical lens 300 is less than twice of that of the EPD, which is beneficial to realizing the large aperture design of the optical system.

The above relation specifies that the range of the ratio of the total optical length to the entrance pupil aperture of the image pickup optical lens 300 is 2.0 or more and 2.1 or less of TTL/EPD. Under the condition that the aperture of the entrance pupil is fixed, the total optical length can be shortened, the total thickness of the shooting optical lens 300 can be reduced, and the occupied space of the shooting optical lens 300 can be reduced.

The above relation specifies that the range of the ratio of the total optical length to the maximum image height of the imaging optical lens 300 is 1.0 or more and TTL/ImgH or less and 1.25 or less. In the case of a fixed size of the image sensor 309, the total optical length can be shortened, the total thickness of the imaging optical lens 300 can be reduced, and the occupied space of the imaging optical lens 300 can be reduced.

Optionally, the image pickup optical lens 300 may further satisfy: and LT/TTL is more than or equal to 0.85 and less than or equal to 0.90, wherein LT is the farthest distance from the object side surface of the first lens 301 to the image side surface of the seventh lens 307 on the optical axis, and TTL is the total optical length of the photographic optical lens 300.

The relation specifies that the ratio of the maximum distance from the object side surface of the first lens 301 to the image side surface of the seventh lens 307 on the optical axis to the total optical length is in a range of 0.85 to 0.90. Under the condition that the overall thickness of the image pickup optical lens 300 is constant, a movable space needs to be reserved for the image pickup optical lens 300, and the diversity of the positional relationship between different lenses is improved, so that the working focal length range of the image pickup optical lens 300 can be widened under the condition that the occupied space of the image pickup optical lens 300 is constant.

The structure of each lens of the image pickup optical lens is described below.

It should be understood that the above-mentioned "respective lenses of the image pickup optical lens" refer to lenses constituting the image pickup optical lens, and in the embodiment of the present application, are the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

Alternatively, in the embodiment of the present application, the first lens 301 may have positive optical power, the object-side surface of the first lens 301 is convex near the optical axis, and the image-side surface of the first lens 301 is concave near the optical axis.

Referring to (a) of fig. 4, a chain line is used to indicate an optical axis L of the lens, an object side surface of the first lens 301 is convex near the optical axis L, and an image side surface of the first lens 301 is concave near the optical axis L. In the embodiment of the present application, the portion of the optical surface near the optical axis includes a portion of the optical surface on the optical axis. The object-side surface of the first lens element 301 is convex near the optical axis L, which can improve the light converging capability of the object-side surface and reduce the overall thickness of the image pickup optical lens assembly 300. The image side surface of the first lens element 301 is concave near the optical axis L, which reduces astigmatism of the imaging optical lens assembly 300.

In fig. 4 (a), the shape of the lens and the degree of the irregularity of the object-side surface and the image-side surface are only schematic, and do not limit the embodiment of the present application, and the embodiment of the present application does not limit the irregularity, the size, and the like of the portion of the object-side surface and the image-side surface away from the optical axis.

Optionally, the first lens 301 satisfies: and | EFL/phi 1| is more than or equal to 0.7 and less than or equal to 0.80, wherein phi 1 is the focal power of the first lens 301.

Alternatively, in the embodiment of the present application, the second lens 302 may have a negative power, the object-side surface of the second lens 302 is convex near the optical axis, and the image-side surface of the second lens 302 is concave near the optical axis.

Similarly, still referring to (a) in fig. 4, a chain line is used to indicate the optical axis L of the lens, the object-side surface of the second lens 302 is convex near the optical axis L, and the image-side surface of the second lens 302 is concave near the optical axis L, which can reduce spherical aberration and chromatic aberration of the lenses of the image-taking optical lens 300.

Note that the shape of the lens and the degree of the irregularity on the object-side surface and the image-side surface in fig. 4 (a) are merely schematic, and the present embodiment is not limited at all with respect to the irregularity, the size, and the like of the portions of the object-side surface and the image-side surface away from the optical axis.

Optionally, in the embodiment of the present application, the second lens 302 satisfies: and (R21 + R22)/(R21-R22) is not less than 5.0 and not more than 6.5, wherein R21 is the curvature radius of the object side surface of the second lens 302, and R22 is the curvature radius of the image side surface of the second lens 302.

The above relationship defines a range of ratios of the radii of curvature of the object side surface and the image side surface of the second lens element 302, which is advantageous for reducing system tolerance sensitivity.

Optionally, the second lens satisfies: 5.5-6.0 percent (R21 + R22)/(R21-R22).

Alternatively, in the embodiment of the present application, the third lens 303 may have positive optical power, the object-side surface of the third lens 303 is convex near the optical axis, and the image-side surface of the third lens 303 is concave near the optical axis.

Referring to (b) of fig. 4, the object-side surface of the third lens 303 is convex near the optical axis L, and the image-side surface of the third lens 303 is also convex near the optical axis L. The third lens 303 may have positive focal power, and an object-side surface of the third lens 303 is a convex surface near the optical axis, which is beneficial to balance the comprehensive aberration of the image pickup optical lens 300.

Note that the shape of the lens and the degree of the irregularity on the object-side surface and the image-side surface in fig. 4 (b) are merely schematic, and the present embodiment is not limited at all with respect to the irregularity, the size, and the like of the portions of the object-side surface and the image-side surface away from the optical axis.

Optionally, the image-side surface of the third lens 303 includes at least three inflection points.

That is, the image-side surface of the third lens 303 includes at least two concave surfaces.

Referring to (c) in fig. 4, the object side surface of the third lens 303 is convex near the optical axis L. The image-side surface of the third lens element 303 is also convex near the optical axis L, and the convex surface includes three points of inflection, such that there are concave surfaces on both sides of the convex surface.

Since the image-side surface of the third lens 303 includes both convex and concave surfaces, the shape of the image-side surface of the third lens 303 is neither convex nor concave in practice. For clarity, when a surface includes 3 points of inflection, the surface closest to the optical axis is convex, and the surface is considered convex. That is, since the inflection point is provided on the convex surface, the convexoconcave characteristics on both sides of the convex surface are changed so that the concave surface is formed on both sides of the convex surface. Further, if 5 inflection points are included on the convex surface, the surface closest to the optical axis is the convex surface, concave surfaces are present on both sides of the convex surface, and the convex surface is on the side of either concave surface away from the optical axis. The image side surface of the third lens 303 includes at least three points of inflection that are beneficial for improving the resultant aberration for the off-axis field, i.e., improving the resultant aberration at the edges of the image. The image side surface of the third lens element 303 includes at least three inflection points, which is beneficial to moving the principal point of the image pickup optical lens 300 toward the object space, and effectively shortening the effective focal length and the total thickness of the image pickup optical lens 300.

In fig. 4 (c), the shape of the lens and the degree of the irregularity of the object-side surface and the image-side surface are only schematic, and do not limit the embodiment of the present application, and the embodiment of the present application does not limit the irregularity, the size, and the like of the portion of the object-side surface and the image-side surface away from the optical axis.

Alternatively, in the embodiment of the present application, the fourth lens 304 may have a negative power, the object-side surface of the fourth lens 304 may be concave near the optical axis, and the image-side surface of the third lens 303 may be convex near the optical axis.

Referring to (d) of fig. 4, the object-side surface of the fourth lens 304 is concave near the optical axis L, and the image-side surface of the third lens 303 is convex near the optical axis L. The fourth lens element 304 may have negative focal power, which is beneficial to balance the distribution of the negative focal power of the image pickup optical lens 300 and reduce the sensitivity of the image pickup optical lens 300.

In fig. 4 (d), the shape of the lens and the degree of the irregularity on the object-side surface and the image-side surface are only schematic, and the present embodiment is not limited at all with respect to the irregularity, the size, and the like of the portions of the object-side surface and the image-side surface away from the optical axis.

Alternatively, in the embodiment of the present application, the fifth lens 305 may have a negative power, the object-side surface of the fifth lens 305 is convex near the optical axis, and the image-side surface of the fifth lens 305 is concave near the optical axis.

Similarly, still referring to (a) in fig. 4, a chain line is used to indicate the optical axis L of the lens, the object-side surface of the fifth lens 305 is convex near the optical axis L, and the image-side surface of the fifth lens 305 is concave near the optical axis L, which can reduce spherical aberration and chromatic aberration of the lenses of the image-taking optical lens 300. This is beneficial to enhancing the convergence degree of the light passing through the fifth lens 305, and effectively shortening the overall thickness of the image pickup optical lens 300.

Optionally, the fifth lens 305 satisfies: the EFL/R51 + EFL/R52 is not less than 0.5, wherein EFL is the effective focal length of the image pickup optical lens 300, R51 is the radius of curvature of the object-side surface of the fifth lens 305, and R52 is the radius of curvature of the image-side surface of the fifth lens 305.

Optionally, the fifth lens satisfies: 0.8 less than or equal to | EFL/R51| + | EFL/R52| <1.3.

The above relation defines a range of a ratio of a curvature radius of the object-side surface to a curvature radius of the image-side surface of the fifth lens element 305, which is advantageous for scaling in the same optical system architecture.

Alternatively, in the embodiment of the present application, the sixth lens 306 may have positive optical power, the object-side surface of the sixth lens 306 is convex near the optical axis, and the image-side surface of the sixth lens 306 is concave near the optical axis.

Similarly, still referring to (a) in fig. 4, a chain line is used to indicate the optical axis L of the lens, the object-side surface of the sixth lens 306 is convex near the optical axis L, and the image-side surface of the sixth lens 306 is concave near the optical axis L, so that spherical aberration and chromatic aberration of the lenses of the image-taking optical lens 300 can be reduced. This is beneficial to enhancing the convergence degree of the light passing through the sixth lens 306, and effectively shortening the overall thickness of the image pickup optical lens 300.

Optionally, the sixth lens 306 satisfies: the effective focal length of the image pickup optical lens 300 is equal to or greater than 1.5 | EFL/R61| + | EFL/R62| ≦ 2.3, where EFL is the effective focal length of the image pickup optical lens, R61 is the radius of curvature of the object-side surface of the sixth lens 306, and R62 is the radius of curvature of the image-side surface of the sixth lens 306.

The above relation defines a range of a ratio of a radius of curvature of the object-side surface to a radius of curvature of the image-side surface of the sixth lens element 306, which is advantageous for scaling under the same optical system architecture.

Optionally, the sixth lens 306 satisfies: and | EFL/phi 6| is more than or equal to 0.40 and less than or equal to 0.60, wherein phi 6 is the focal power of the sixth lens 306.

Alternatively, in the embodiment of the present application, the seventh lens 307 may have negative optical power, the object-side surface of the seventh lens 307 is concave near the optical axis, and the image-side surface of the seventh lens 307 is concave near the optical axis.

Referring to (e) in fig. 4, a chain line is used to indicate the optical axis L of the lens, the object-side surface of the seventh lens 307 is concave near the optical axis L, and the image-side surface of the seventh lens 307 is concave near the optical axis L.

It should be noted that the shape of the lens and the degree of the irregularity of the object-side surface and the image-side surface in fig. 4 (e) are only schematic, and do not limit the embodiment of the present application at all, and the embodiment of the present application does not limit the irregularity, the size, and the like of the portion of the object-side surface and the image-side surface away from the optical axis at all.

Optionally, the object side of the seventh lens 307 includes at least three points of inflection.

That is, the object side surface of the seventh lens 307 includes at least two convex surfaces.

Optionally, the image side surface of the seventh lens 307 includes at least three inflection points.

That is, the image-side surface of the seventh lens 307 includes at least two convex surfaces.

Referring to (f) of fig. 4, the object side surface of the seventh lens 307 is concave near the optical axis L, and the concave surface includes three points of inflection such that there is one convex surface on both sides of the concave surface. The image-side surface of the seventh lens element 307 is also concave near the optical axis L, and the concave surface includes three points of inflection, so that convex surfaces exist on both sides of the concave surface.

Since the object-side surface of the seventh lens 307 includes both convex and concave surfaces, the shape of the object-side surface of the seventh lens 307 is neither convex nor concave in practice. Since the image-side surface of the seventh lens 307 includes both convex and concave surfaces, the shape of the image-side surface of the seventh lens 307 is neither convex nor concave in practice. For clarity, when a surface includes 3 points of inflection, the surface of the surface closest to the optical axis is concave, and the surface is considered concave. That is, since the inflection point is provided on the concave surface, the convexoconcave property on both sides of the concave surface is changed so that the convex surface is formed on both sides of the concave surface. Further, if 5 points of inflection are included on the concave surface, the surface closest to the optical axis is a concave surface, convex surfaces exist on both sides of the concave surface, and a concave surface is provided on either side of the convex surface away from the optical axis. The object side surface of the seventh lens 307 and/or the image side surface of the seventh lens 307 include at least three points of inflection that facilitate improved overall aberration for the off-axis field of view, i.e., improved overall aberration at the edges of the image. Moreover, the object-side surface of the seventh lens element 307 and/or the image-side surface of the seventh lens element 307 include at least three inflection points, which is beneficial to moving the principal point of the image-capturing optical lens 300 toward the object space, and effectively shortening the effective focal length and the overall thickness of the image-capturing optical lens 300.

In fig. 4 (f), the shape of the lens and the degree of the irregularity on the object-side surface and the image-side surface are only schematic, and the present embodiment is not limited at all with respect to the irregularity, the size, and the like of the portions of the object-side surface and the image-side surface away from the optical axis.

Optionally, each lens of the image pickup optical lens 300 is an aspheric surface.

Optionally, the non-curved surface curve equation of each lens of the image pickup optical lens 300 satisfies:

wherein z is the relative distance between a point on the aspheric surface, which is r away from the optical axis, and a tangent plane of an intersection point tangent to the aspheric surface on the optical axis; r is the perpendicular distance between the point on the aspheric surface and the optical axis; c is the curvature at the aspheric optical axis; k is the cone coefficient; alpha is alpha _i Are the i-th order aspheric coefficients.

Optionally, each lens of the image pickup optical lens 300 may be made of a plastic material, a glass material, or other materials that can meet the performance requirements of the lens, such as a composite material. The "respective lenses of the image pickup optical lens 300" refer to a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, a fifth lens 305, a sixth lens 306, and a seventh lens 307, and may also be denoted as a first lens 301 to a seventh lens 307.

In the embodiment of the present application, the maximum refractive index of the imaging optical lens 300 is Nmax, and the minimum refractive index of the imaging optical lens 300 is Nmin, which respectively satisfy: nmax is more than or equal to 1.65 and less than or equal to 1.70, and Nmin is more than or equal to 1.50 and less than or equal to 1.58. The maximum refractive index of the imaging optical lens 300 is the refractive index of the lens having the maximum refractive index in the imaging optical lens 300; the minimum refractive index of the imaging optical lens 300 is a refractive index of a lens having the smallest refractive index in the imaging optical lens 300. The minimum dispersion coefficient of the image pickup optical lens 300 is Vmin, and the maximum dispersion coefficient of the image pickup optical lens 300 is Vmax, which respectively satisfy: vmin >15, and Vmax <60. The maximum dispersion coefficient of the imaging optical lens 300 is the dispersion coefficient of the lens with the maximum dispersion coefficient in the imaging optical lens 300; the minimum dispersion coefficient of the imaging optical lens 300 is the dispersion coefficient of the lens having the smallest dispersion coefficient in the imaging optical lens 300. Through reasonable collocation of the refractive index and the dispersion coefficient of different lenses, the comprehensive aberration of the lens group can be improved, and the miniaturization of the lens group is favorably realized.

Optionally, in this embodiment of the application, the total optical length TTL of the image capturing optical lens 300 is less than or equal to 7.6 mm, which is beneficial to implementing lightness and thinness. Preferably, the total optical length TTL of the image pickup optical lens 300 may be 7.53, 7.45, 7.40, or the like.

In the embodiment of the present application, the thickness of the first lens 301 on the optical axis is CT1, the thickness of the second lens 302 on the optical axis is CT2, the thickness of the third lens 303 on the optical axis is CT3, the thickness of the fourth lens 304 on the optical axis is CT4, the thickness of the fifth lens 305 on the optical axis is CT5, the thickness of the sixth lens 306 on the optical axis is CT6, and the thickness of the seventh lens 307 on the optical axis is CT7. The thicknesses of the respective lenses of the image pickup optical lens 300 may satisfy the following conditions: CT6/CT2>2.0, CT6/CT4>2.0, CT6/CT5>2.0, CT6/CT1>1.2, CT6/CT3>1.2, CT6/CT7>1.2. The optimal balance between the miniaturization of the lens group and the manufacturability of the lens can be obtained by reasonably configuring the thicknesses of different lenses.

In the embodiment of the present application, the field angle of the imaging optical lens 300 is FOV, and FOV is 75 ° or more and 125 ° or less. The total optical length TTL and the maximum image height ImgH of the lens, the EPD parameter of the entrance pupil diameter satisfies 2 (TTL) ² /(EPD. Times. ImgH) < 2.7. By appropriate parameter combination, a high-performance image can be obtained on the large-sized image sensor 309, and the image pickup optical lens has the characteristics of a large aperture and a compact structure.

In the embodiment of the present application, the maximum optical effective diameter of the object-side surface of the first lens 301 is LD11, the maximum optical effective diameter of the object-side surface of the third lens 303 is LD31, and the first lens 301 and the third lens 303 satisfy 1.0-straw ld11/LD31<1.3. By restricting the maximum optical effective diameters of the first lens 301 and the third lens 303, the aperture of the front end of the lens group can be reduced, thereby reducing the opening of the front end.

According to the given relation and range in the embodiment of the present application, the imaging optical lens 300 can meet the requirement of small TTL and can obtain higher imaging performance through the combination of the lens configuration mode and the lens with a specific optical design.

Some specific, but non-limiting examples of embodiments of the present application will be described in more detail below in conjunction with fig. 3, 5-18.

For convenience of understanding, the embodiments of the present application are described by taking a lens made of plastic as an example. However, it should be understood that the material of each lens of the image pickup optical lens 300 is not particularly limited in the embodiments of the present application, and other lens materials that can satisfy the correlation equation may be selected.

Example 1

The imaging optical lens system 300 according to an embodiment of the present application, in order from an object side to an image side, includes: a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, a fifth lens 305, a sixth lens 306, and a seventh lens 307, as shown in fig. 3.

For convenience of description, in the following embodiments, STO denotes a surface of the stop 310, S1 denotes an object-side surface of the first lens 301, S2 denotes an image-side surface of the first lens 301, S3 denotes an object-side surface of the second lens 302, S4 denotes an image-side surface of the second lens 302, S5 denotes an object-side surface of the third lens 303, S6 denotes an image-side surface of the third lens 303, S7 denotes an object-side surface of the fourth lens 304, S8 denotes an image-side surface of the fourth lens 304, S9 denotes an object-side surface of the fifth lens 305, S10 denotes an image-side surface of the fifth lens 305, S11 denotes an object-side surface of the sixth lens 306, S12 denotes an image-side surface of the sixth lens 306, S13 denotes an object-side surface of the seventh lens 307, S14 denotes an image-side surface of the seventh lens 307, S15 denotes an object-side surface of the infrared filter, and S16 denotes an image-side surface of the infrared filter. TTL denotes the total optical length of the image pickup optical lens 300, imgH denotes the maximum image height of the image pickup optical lens 300, and EFL denotes the effective focal length of the image pickup optical lens 300. At alpha _i Denotes an i-th order aspheric coefficient, i =4, 6, 8, 10, 12, 14, 16, 18, 20. The cone coefficient is denoted by K.

In light of the above relational expressions, tables 1 to 3 show design data of the image pickup optical lens 300 in example one.

Table 1 shows basic parameters of the image pickup optical lens 300 in the embodiment of the present application, as shown in table 1.

Effective focal length EFL	6.71mm
		F value of aperture	1.838
Entrance pupil aperture EPD	3.65mm
		FOV	85°
Total optical length TTL	7.53mm
		Maximum image height ImgH	6.30mm
Design wavelength	650nm，610nm，555nm，510nm，470nm
		LT	6.562mm

Table 1 illustrates basic parameters of an imaging optical lens 300

Table 2 shows the radius of curvature, thickness, material, refractive index, and dispersion coefficient of each constituent lens of the imaging optical lens 300 in the embodiment of the present application, as shown in table 2.

Table 2 illustrates the curvature radius, thickness, material, refractive index, and dispersion coefficient of each constituent lens of an imaging optical lens 300

The positive and negative of the curvature radius indicate that the optical surface is convex towards the object side or the image side, the positive indicates that the optical surface is convex towards the object side near the optical axis, and the negative indicates that the optical surface is convex towards the image side near the optical axis.

The thickness of the diaphragm 310 is negative, which means that the diaphragm 310 is located on the right side of the vertex on the object-side axis of the first lens 301.

Table 3 shows aspherical coefficients of the imaging optical lens 300 according to the embodiment of the present application, as shown in table 3.

Flour mark	K	ɑ4	ɑ6	ɑ8	ɑ10	ɑ12	ɑ14	ɑ16	ɑ18	ɑ20
											S1	0.765038	-0.00284	-0.00692	0.01156	-0.01282	0.008096	-0.00301	0.000616	-5.5E-05	0
S2	0	0.001719	0.009722	-0.01749	0.018966	-0.01148	0.003989	-0.00073	5.2E-05	0
											S3	-1.47714	-0.024	0.017209	-0.01768	0.013012	-0.00541	0.00117	-0.0001	0	0
S4	1.245757	-0.03458	0.008801	-0.00423	-0.00063	0.002064	-0.00084	0.000104	0	0
											S5	3.936254	-0.01446	0.026425	-0.05327	0.070079	-0.0591	0.032038	-0.0105	0.00188	-0.00014
S6	0	-0.00889	0.006744	-0.01216	0.01518	-0.01198	0.00641	-0.0022	0.000445	-4.1E-05
											S7	0	-0.03133	0.001413	-0.00843	0.016575	-0.02012	0.014506	-0.00596	0.001287	-0.00011
S8	0	-0.02983	0.000594	0.012174	-0.02781	0.028306	-0.01614	0.00536	-0.00097	7.45E-05
											S9	-99	-0.01785	-0.06819	0.15236	-0.16661	0.106195	-0.04164	0.009871	-0.0013	7.28E-05
S10	-2.7088	-0.06251	0.014116	0.014821	-0.01933	0.01008	-0.00296	0.0005	-4.5E-05	1.66E-06
											S11	2.472966	-0.04256	0.000629	-0.0017	0.003149	-0.00201	0.000646	-0.00011	1.05E-05	-3.9E-07
S12	0	-0.00407	-0.01411	0.007537	-0.00237	0.000468	-5.8E-05	4.38E-06	-1.8E-07	3.29E-09
											S13	0	-0.06603	0.017831	-0.00398	0.00062	-5.9E-05	3.32E-06	-1.1E-07	1.71E-09	-9.8E-12
S14	-0.77976	-0.07493	0.020427	-0.00432	0.000621	-5.8E-05	3.48E-06	-1.3E-07	2.45E-09	-2E-11

Table 3 aspherical surface coefficients of the image pickup optical lens 300

The non-curved surfaces of the lenses of the imaging optical lens 300 satisfy:

z is the relative distance between a point on the aspheric surface, which is r away from the optical axis, and a tangent plane of an intersection point tangent to the aspheric surface on the optical axis; r is the perpendicular distance between a point on the aspheric curve and the optical axis; c is the curvature at the aspheric optical axis; k is the cone coefficient; alpha 4, alpha 6, alpha 8, alpha 10, alpha 12, alpha 14, alpha 16, alpha 18, alpha 20 are aspheric coefficients.

It should be understood that the aspheric surfaces of the lenses in the image pickup optical lens 300 may be aspheric surfaces shown by the above aspheric surface formula, or may be other aspheric surface formulas, and the present application is not limited thereto.

Given the above design data of the image pickup optical lens 300 according to an embodiment of the present application, the F-number of the aperture is 1.85, the total optical length TTL is 7.53mm, the effective focal length is 6.71mm, and the maximum field angle is 85 °.

In one embodiment provided by the present application, a ratio of the total optical length TTL to the entrance pupil aperture EPD satisfies: TTL/EPD =2.063.

In an embodiment provided by the application, a ratio of total optical length TTL to effective pixel area diagonal length ImgH of a camera imaging surface satisfies: TTL/ImgH =1.204.

In one embodiment provided herein, LT/TTL =0.871.

In one embodiment provided herein, EFL/Φ 1=6.71/8.526=0.787.

In one embodiment provided herein, (R21 + R22)/(R21-R22) = (4.4583 + 3.1313)/(4.4583-3.1313) =5.719.

In one embodiment provided by the present application, | EFL/R51| + | EFL/R52| =6.71/28.5476+6.71/11.2951=0.829.

In one embodiment provided herein, EFL Φ 6=6.71/14.883=0.451.

In one embodiment provided by the present application, | EFL/R61| + | EFL/R62| =6.71/5.0836+6.71/9.3876=2.035.

In one embodiment provided in the present application, (TTL) ² /(EPD×ImgH)＝7.53 ² /(3.65×6.30)＝2.466。

In one embodiment provided by the present application, the refractive index of the second lens, the refractive index of the fourth lens, the refractive index of the fifth lens, and the refractive index of the sixth lens are all higher than the refractive index of the other lenses in the imaging optical lens, so the maximum refractive index Nmax =1.681 of the imaging optical lens.

In one embodiment provided by the present application, the refractive index of the third lens is lower than the refractive index of other lenses in the image pickup optical lens, so the minimum refractive index Nmin =1.535 of the image pickup optical lens.

In one embodiment provided by the present application, the third lens has a higher abbe number than other lenses in the imaging optical lens, so the imaging optical lens has a maximum abbe number Vmax =57.10.

In one embodiment provided by the present application, the abbe number of the second lens, the abbe number of the fourth lens, the abbe number of the fifth lens, and the abbe number of the sixth lens are all lower than the abbe numbers of other lenses in the imaging optical lens, so the minimum abbe number Vmin =18.44 of the imaging optical lens.

In one embodiment provided by the present application, the optical lens has a first lens 301 with a thickness CT1=0.5723mm on the optical axis, a second lens 302 with a thickness CT2=0.3153mm on the optical axis, a third lens 303 with a thickness CT3=0.5751mm on the optical axis, a fourth lens 304 with a thickness CT4=0.3000mm on the optical axis, a fifth lens 305 with a thickness CT5=0.3806mm on the optical axis, a sixth lens 306 with a thickness CT6=0.9000mm on the optical axis, and a seventh lens 307 with a thickness CT7=0.5538mm on the optical axis. CT6/CT2=2.85, ct6/CT4=3.0, ct6/CT5=2.36, ct6/CT1=1.57, ct6/CT3=1.56, ct6/CT7=1.63.

In one embodiment provided by the present application, the maximum optical effective diameter of the object-side surface of the first lens 301 is LD11, and the maximum optical effective diameter of the object-side surface of the third lens 303 is LD32, where LD11/LD32=1.825/1.5722=1.16.

Fig. 5-8 depict the optical performance of a camera optical lens 300 designed in an exemplary manner to illustrate one such lens combination.

Fig. 5 shows axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 300 of example one.

Fig. 6 shows the vertical axis chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 300 of example one.

Fig. 7 is a schematic diagram showing optical distortion of light having a wavelength of 650nm after passing through the imaging optical lens 300 of example one.

Fig. 8 is a schematic view showing meridional astigmatism and sagittal astigmatism of light having a wavelength of 650nm passing through the imaging optical lens 300 of example one.

In an example one, the total optical length of the image pickup optical lens is reduced, so that the image pickup optical lens can be conveniently installed in the electronic equipment, occupies relatively less internal space of the electronic equipment, and does not affect the thickness of the electronic equipment basically. A smaller F value of the aperture (i.e., the imaging optical lens has a larger aperture) can be obtained, so that a shorter depth of field can be realized, and the imaging optical lens can obtain a better blurring effect; in addition, the larger diaphragm can increase the light entering amount of the shooting optical lens, and better imaging performance can be obtained at night.

Example two

The imaging optical lens system 900 according to an embodiment of the present application, in order from an object side to an image side, includes: a first lens 901, a second lens 902, a third lens 903, a fourth lens 904, a fifth lens 905, a sixth lens 906, and a seventh lens 907, as shown in fig. 9.

For convenience of description, in the following embodiments, STO denotes a surface of the stop 910, S1 denotes an object-side surface of the first lens 901, S2 denotes an image-side surface of the first lens 901, S3 denotes an object-side surface of the second lens 902, S4 denotes an image-side surface of the second lens 902, S5 denotes an object-side surface of the third lens 903, S6 denotes an image-side surface of the third lens 903, S7 denotes an object-side surface of the fourth lens 904, S8 denotes an image-side surface of the fourth lens 904, S9 denotes an object-side surface of the fifth lens 905, S10 denotes an image-side surface of the fifth lens 905, S11 denotes an object-side surface of the sixth lens 906, S12 denotes an image-side surface of the sixth lens 906, S13 denotes an object-side surface of the seventh lens 907, S14 denotes an image-side surface of the seventh lens 907,s15 represents the object side surface of the infrared filter, and S16 represents the image side surface of the infrared filter. The total optical length of the imaging optical lens 900 is denoted by TTL, the maximum image height of the imaging optical lens 900 is denoted by ImgH, and the effective focal length of the imaging optical lens 900 is denoted by EFL. At alpha _i Denotes the ith order aspheric coefficients, i =4, 6, 8, 10, 12, 14, 16, 18, 20. The cone coefficient is denoted by K.

In light of the above relational expressions, tables 4 to 6 show design data of the image pickup optical lens 900 in example two.

Table 4 shows basic parameters of the image pickup optical lens 900 in the embodiment of the present application, as shown in table 4.

Effective focal length EFL	6.70mm
		F value of aperture	1.851
Entrance pupil aperture EPD	3.62mm
		FOV	85°
Total optical length TTL	7.45mm
		Maximum image height ImgH	6.30mm
Design wavelength	650nm，610nm，555nm，510nm，470nm
		LT	6.545mm

Table 4 illustrates basic parameters of the two-camera optical lens 900

Table 5 shows the curvature radius, thickness, material, refractive index, and dispersion coefficient of each constituent lens of the imaging optical lens 900 according to the embodiment of the present application, as shown in table 5.

Table 5 illustrates the curvature radius, thickness, material, refractive index, and dispersion coefficient of each constituent lens of the two-camera optical lens 900

Here, the thickness of the stop 910 is negative, which means that the stop 910 is located on the right side of the vertex on the object-side axis of the first lens 901.

Table 6 shows aspheric coefficients of the imaging optical lens 900 according to the embodiment of the present application, as shown in table 6.

Table 6 aspherical surface coefficients of the imaging optical lens 900

The non-curved surfaces of the lenses of the imaging optical lens 900 satisfy:

It should be understood that the aspheric surfaces of the lenses in the image pickup optical lens 900 may use the aspheric surface shown in the above aspheric surface formula, and may also use other aspheric surface formulas, which are not limited in this application.

Given the above design data of the image pickup optical lens 900 according to an embodiment of the present application, the F value of the aperture is 1.85, the total optical length TTL is 7.45mm, the effective focal length is 6.70mm, and the maximum field angle is 85 °.

In one embodiment provided by the present application, a ratio of the total optical length TTL to the entrance pupil aperture EPD satisfies: TTL/EPD =2.058.

In an embodiment provided by the application, a ratio of total optical length TTL to effective pixel area diagonal length ImgH of a camera imaging surface satisfies: TTL/ImgH =1.192.

In one embodiment provided herein, LT/TTL =0.879.

In one embodiment provided herein, EFL/Φ 1=6.70/8.643=0.775.

In one embodiment provided herein, (R21 + R22)/(R21-R22) = (4.4802 + 3.1218)/(4.4802-3.1218) =5.596.

In one embodiment provided by the present application, | EFL/R51| + | EFL/R52| =6.70/14.4907+6.70/9.7742=1.148.

In one embodiment provided herein, EFL Φ 6=6.70/12.975=0.516.

In one embodiment provided by the present application, | EFL/R61| + | EFL/R62| =6.70/5.0439+6.70/11.9957= -1.887.

In one embodiment provided in the present application, (TTL) ² /(EPD×ImgH)＝7.45 ² /(3.62×6.30)＝2.434。

In one embodiment provided by the present application, the third lens has a higher abbe number than other lenses in the image pickup optical lens, and thus the image pickup optical lens has a maximum abbe number Vmax =57.10.

In one embodiment provided by the present application, the abbe number of the second lens, the abbe number of the fourth lens, and the abbe number of the fifth lens are all lower than the abbe numbers of other lenses in the imaging optical lens, so the minimum abbe number Vmin =18.44 of the imaging optical lens.

In one embodiment provided by the application, the thickness of the first optical lens 901 on the optical axis is CT1=0.5699mm, the thickness of the second lens 902 on the optical axis is CT2=0.3005mm, the thickness of the third lens 903 on the optical axis is CT3=0.5690mm, the thickness of the fourth lens 904 on the optical axis is CT4=0.3000m, the thickness of the fifth lens 905 on the optical axis is CT5=0.3730mm, the thickness of the sixth lens 906 on the optical axis is CT6=0.8500mm, and the thickness of the seventh lens 907 on the optical axis is CT7=0.4002mm. CT6/CT2=2.83, ct6/CT4=2.83, ct6/CT5=2.28, ct6/CT1=1.49, ct6/CT3=1.49, ct6/CT7=2.12.

In one embodiment provided by the present application, the maximum optical effective diameter of the object-side surface of the first lens 901 is LD11, and the maximum optical effective diameter of the object-side surface of the third lens 903 is LD32, where LD11/LD32=1.8100/1.5561=1.16.

Fig. 10-13 depict the optical performance of an image capture optical lens 900 designed in an exemplary manner to illustrate two such lens combinations.

Fig. 10 shows axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 900 of example two.

Fig. 11 shows the vertical axis chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 900 of example two.

Fig. 12 is a schematic diagram showing optical distortion of light having a wavelength of 650nm after passing through the imaging optical lens 900 of example two.

Fig. 13 is a schematic diagram showing meridional astigmatism and sagittal astigmatism of light having a wavelength of 650nm passing through the imaging optical lens 900 of example two.

In the second example, the total optical length of the image pickup optical lens is reduced, so that the image pickup optical lens can be conveniently installed in the electronic device, occupies relatively less internal space of the electronic device, and does not affect the thickness of the electronic device basically. Moreover, a smaller F value of the aperture (i.e. the camera optical lens has a larger aperture) can be obtained, so that a shorter depth of field can be realized, and the camera optical lens can obtain a better blurring effect; in addition, the larger diaphragm can increase the light entering amount of the shooting optical lens, and better imaging performance can be obtained at night. Compared with the first example, the aperture value of the second example is relatively larger (i.e., the image pickup optical lens in the second example has a smaller aperture), the incoming light is relatively reduced by about one percent, the optical total length of the image pickup optical lens is significantly reduced, and the image pickup optical lens in the second example is more compact in structure and is convenient to install in the electronic device.

Example three

The imaging optical lens system 1400 of the present application includes, in order from an object side to an image side: a first lens 1401, a second lens 1402, a third lens 1403, a fourth lens 1404, a fifth lens 1405, a sixth lens 1406, and a seventh lens 1407, as shown in fig. 14.

For convenience of description, in the following embodiments, STO denotes a surface of the stop 1410, S1 denotes an object-side surface of the first lens 1401, S2 denotes an image-side surface of the first lens 1401, S3 denotes an object-side surface of the second lens 1402, S4 denotes an image-side surface of the second lens 1402, S5 denotes an object-side surface of the third lens 1403, S6 denotes an image-side surface of the third lens 1403, S7 denotes an object-side surface of the fourth lens 1404, S8 denotes an image-side surface of the fourth lens 1404, S14 denotes an object-side surface of the fifth lens 1405, S10 denotes an image-side surface of the fifth lens 1405, S11 denotes an object-side surface of the sixth lens 1406, S12 denotes an image-side surface of the sixth lens 1406, S13 denotes an object-side surface of the seventh lens 1407, S14 denotes an image-side surface of the seventh lens 1407S15 denotes an object side surface of the infrared filter, and S16 denotes an image side surface of the infrared filter. TTL denotes the total optical length of the image pickup optical lens 1400, imgH denotes the maximum image height of the image pickup optical lens 1400, and EFL denotes the effective focal length of the image pickup optical lens 1400. At alpha _i Denotes an i-th order aspheric coefficient, i =4, 6, 8, 10, 12, 14, 16, 18, 20. The cone coefficient is denoted by K.

From the above relational expressions, tables 7 to 9 show design data of the image pickup optical lens 1400 in example three.

Table 7 shows basic parameters of the image pickup optical lens 1400 in the embodiment of the present application, as shown in table 7.

Effective focal length EFL	6.70mm
		F value of aperture	1.861
Entrance pupil aperture EPD	3.6mm
		FOV	85°
Total optical length TTL	7.40mm
		Maximum image height ImgH	6.30mm
Design wavelength	650nm，610nm，555nm，510nm，470nm
		LT	6.495mm

Table 7 illustrates basic parameters of the three-camera optical lens 1400

Table 8 shows the radius of curvature, thickness, material, refractive index, and dispersion coefficient of each constituent lens of the imaging optical lens 1400 in the present embodiment, as shown in table 8.

Table 8 illustrates the radius of curvature, thickness, material, refractive index, dispersion of each constituent lens of the three-camera optical lens 1400

Coefficient of performance

Where the thickness of the stop 1410 is negative, it means that the stop 1410 is located to the right of the vertex on the object-side axis of the first lens 1401.

Table 9 shows aspheric coefficients of the imaging optical lens 1400 of the embodiment of the present application, as shown in table 9.

Table 9 aspherical surface coefficients of the imaging optical lens 1400

The non-curved surfaces of the lenses of the image pickup optical lens 1400 satisfy:

It should be understood that the aspheric surfaces of the lenses in the image capturing optical lens 1400 may use aspheric surfaces shown in the above aspheric surface formula, or may use other aspheric surface formulas, and the present application is not limited thereto.

Given the above design data of the image pickup optical lens 1400 according to an embodiment of the present application, the F-number of the aperture is 1.85, the total optical length TTL is 7.40mm, the effective focal length is 6.70mm, and the maximum field angle is 85 °.

In one embodiment provided by the present application, a ratio of the total optical length TTL to the entrance pupil aperture EPD satisfies: TTL/EPD =2.056.

In an embodiment provided by the application, a ratio of total optical length TTL to effective pixel area diagonal length ImgH of a camera imaging surface satisfies: TTL/ImgH =1.184.

In one embodiment provided by the present application, LT/TTL =0.878

In one embodiment provided herein, EFL/Φ 1=6.70/8.709=0.769.

In one example provided herein, (R21 + R22)/(R21-R22) = (4.3317 + 3.0849)/(4.3317-3.0849) =5.949.

In one embodiment provided by the present application, | EFL/R51| + | EFL/R52| =6.70/12.9205+6.70/8.9275= -1.269.

In one embodiment provided herein, EFL/Φ 6=6.70/13.062=0.513.

In one embodiment provided by the present application, | EFL/R61| + | EFL/R62| =6.70/5.0291+6.70/11.8212=1.899.

In one embodiment provided by the present application, (TTL) ² /(EPD×ImgH)＝7.40 ² /(3.6×6.30)＝2.414。

In one embodiment provided by the present application, the abbe number of the second lens, the abbe number of the fourth lens, and the abbe number of the fifth lens are all lower than the abbe numbers of other lenses in the image pickup optical lens, so that the minimum abbe number Vmin =18.44 of the image pickup optical lens.

In one embodiment provided by the present application, the optical lens has a first lens 1401 with a thickness CT1=0.5692mm on the optical axis, a second lens 1402 with a thickness CT2=0.2909mm on the optical axis, a third lens 1403 with a thickness CT3=0.5597mm on the optical axis, a fourth lens 1404 with a thickness CT4=0.3000mm on the optical axis, a fifth lens 1405 with a thickness CT5=0.3555mm on the optical axis, a sixth lens 1406 with a thickness CT6=0.8114mm on the optical axis, and a seventh lens 1407 with a thickness CT7=0.4000mm on the optical axis. CT6/CT2=2.78, ct6/CT4=2.70, ct6/CT5=2.28, ct6/CT1=1.44, ct6/CT3=1.45, ct6/CT7=2.03.

In one embodiment provided by the present application, the maximum optically effective diameter of the object-side surface of the first lens 1401 is LD11, and the maximum optically effective diameter of the object-side surface of the third lens 1403 is LD32, where LD11/LD32=1.8000/1.4464=1.24.

Fig. 15-18 depict the optical performance of a photographic optical lens 1400 designed in an exemplary three such lens combination.

Fig. 15 shows axial chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 1400 of example three.

Fig. 16 shows the vertical axis chromatic aberration of light having wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively, after passing through the imaging optical lens 1400 of example three.

Fig. 17 shows an optical distortion diagram of light having a wavelength of 650nm after passing through the imaging optical lens 1400 of example three.

Fig. 18 is a schematic diagram showing meridional astigmatism and sagittal astigmatism of light having a wavelength of 650nm passing through the imaging optical lens 1400 of example three.

In example three, the total optical length of the image pickup optical lens is reduced, so that the image pickup optical lens can be conveniently installed in the electronic device, occupies relatively less internal space of the electronic device, and does not substantially affect the thickness of the electronic device. A smaller F value of the aperture (i.e., the imaging optical lens has a larger aperture) can be obtained, so that a shorter depth of field can be realized, and the imaging optical lens can obtain a better blurring effect; in addition, the larger diaphragm can increase the light entering amount of the shooting optical lens, and better imaging performance can be obtained at night. Compared with example two, the aperture value of example three is relatively large (i.e., the image pickup optical lens in example three has a smaller aperture), the incoming light is relatively reduced by about one percent, while the optical total length of the image pickup optical lens is significantly reduced, and the image pickup optical lens in example three is more compact in structure and convenient to install in the electronic device.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

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

a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element;

the imaging optical lens satisfies the following relational expression:

f is more than or equal to 1.8 and less than or equal to 1.9; and the number of the first and second electrodes,

TTL/EPD is more than or equal to 2.0 and less than or equal to 2.1; and the number of the first and second electrodes,

1.0≤TTL/ImgH≤1.25；

wherein F is an aperture of the shooting optical lens, EPD is an entrance pupil aperture of the shooting optical lens, TTL is the total optical length of the shooting optical lens, and ImgH is the maximum image height of the shooting optical lens;

the first lens satisfies:

and | EFL/Φ 1| of more than or equal to 0.7 and less than or equal to 0.80, wherein Φ 1 is the focal power of the first lens, and EFL is the effective focal length of the photographic optical lens.

2. The imaging optical lens according to claim 1, characterized in that the imaging optical lens satisfies: TTL/ImgH is more than or equal to 1.18 and less than or equal to 1.21.

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

LT/TTL is more than or equal to 0.85 and less than or equal to 0.90, wherein LT is the farthest distance between the object side surface of the first lens and the image side surface of the seventh lens on the optical axis.

4. The imaging optical lens according to claim 3, characterized in that the imaging optical lens satisfies: LT/TTL is more than or equal to 0.87 and less than or equal to 0.88.

5. The imaging optical lens according to any one of claims 1 to 4, wherein the first lens satisfies:

0.76≤|EFL/Φ1|≤0.79。

6. the imaging optical lens according to any one of claims 1 to 4, wherein the second lens satisfies:

5.0 ≦ (R21 + R22)/(R21-R22) ≦ 6.5, wherein R21 is a radius of curvature of the object-side surface of the second lens, and R22 is a radius of curvature of the image-side surface of the second lens.

7. The imaging optical lens according to claim 6, wherein the second lens satisfies:

5.5≤(R21+R22)/(R21-R22)≤6.0。

8. the imaging optical lens according to any one of claims 1 to 4,

the image-side surface of the third lens element is convex at a paraxial region and includes at least three inflection points.

9. The imaging optical lens according to any one of claims 1 to 4, wherein the fifth lens satisfies:

and the EFL/R51 +/-EFL/R52 is less than or equal to 0.5 and less than or equal to 2.0, wherein EFL is the effective focal length of the photographic optical lens, R51 is the curvature radius of the object side surface of the fifth lens, and R52 is the curvature radius of the image side surface of the fifth lens.

10. The imaging optical lens according to claim 9, wherein the fifth lens satisfies:

0.8≤|EFL/R51|+|EFL/R52|≤1.3。

11. the imaging optical lens according to any one of claims 1 to 4, wherein the sixth lens satisfies:

and | EFL/phi 6| is more than or equal to 0.40 and less than or equal to 0.60, wherein EFL is the effective focal length of the photographic optical lens, and phi 6 is the focal power of the sixth lens.

12. The imaging optical lens according to claim 11, wherein in the sixth lens, it satisfies:

0.44≤|EFL/Φ6|≤0.52。

13. the imaging optical lens according to any one of claims 1 to 4, wherein the sixth lens satisfies:

and the EFL/R61 + EFL/R62 is not less than 1.5 and not more than 2.3, wherein EFL is the effective focal length of the image pickup optical lens, R61 is the curvature radius of the object side surface of the sixth lens, and R62 is the curvature radius of the image side surface of the sixth lens.

14. The imaging optical lens according to claim 13, wherein the sixth lens satisfies:

1.85≤|EFL/R61|+|EFL/R62|≤2.05。

15. the imaging optical lens according to any one of claims 1 to 4,

the object side surface of the seventh lens element is concave at a paraxial region, the object side surface of the seventh lens element comprises at least three inflection points, and/or,

the image-side surface of the seventh lens element is concave at a paraxial region and includes at least three inflection points.

16. An imaging optical lens according to any one of claims 1 to 4, characterized in that the imaging optical lens satisfies:

2≤(TTL) ² /(EPD×ImgH)≤2.7。

17. the image-taking optical lens according to claim 16, characterized in that the image-taking optical lens satisfies:

2.4≤(TTL) ² /(EPD×ImgH)≤2.5。

18. an imaging optical lens according to any one of claims 1 to 4, characterized in that the imaging optical lens satisfies:

nmax is more than or equal to 1.65 and less than or equal to 1.70, and Nmin is more than or equal to 1.50 and less than or equal to 1.58, wherein Nmax is the maximum refractive index of the photographic optical lens, and Nmin is the minimum refractive index of the photographic optical lens.

19. An imaging optical lens according to any one of claims 1 to 4, characterized in that the imaging optical lens satisfies:

vmin is more than or equal to 15 and less than or equal to 20, and Vmax is more than or equal to 55 and less than or equal to 60, wherein Vmax is the maximum dispersion coefficient of the photographic optical lens, and Vmin is the minimum dispersion coefficient of the photographic optical lens.

20. An imaging optical lens according to any one of claims 1 to 4, characterized in that the imaging optical lens satisfies:

3.5> CT6/CT2>2.0, and, 4.0> CT6/CT4>2.0, and, 2.5> -CT6/CT 5>2.0, and, 2.0> -CT6/CT 1>1.2, and, 2.0> -CT6/CT 3>1.2, and, 3.0> -CT6/CT 7>1.2;

wherein CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

21. The image-taking optical lens according to claim 20, characterized in that the image-taking optical lens satisfies: 2.9> CT6/CT2>2.7, and, 3.2> CT6/CT4>2.5, and, 2.4> -CT6/CT 5>2.2, and, 1.6> -CT6/CT 1>1.4, and, 1.6> -CT6/CT 3>1.4, and, 2.2> -CT6/CT 7>1.5.

22. An imaging optical lens according to any one of claims 1 to 4, characterized in that the imaging optical lens satisfies:

1.0< -LD11/LD 31<1.3, wherein LD11 is the maximum optical effective diameter of the object side surface of the first lens, and LD31 is the maximum optical effective diameter of the object side surface of the third lens.

23. A camera module comprising a camera optical lens according to any one of claims 1 to 22 and a motor for driving the camera optical lens for focusing and/or optical anti-shake.

24. An electronic device comprising a processor and the camera module of claim 23, wherein the camera module is configured to obtain image data and input the image data into the processor, so that the processor processes the image data.