CN113391433B - Optical lens, camera module and electronic equipment - Google Patents

Abstract

The invention discloses an optical lens, a camera module and electronic equipment, wherein the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from an object side to an image side along an optical axis; the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface; the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface; the sixth lens element with negative refractive power has a concave image-side surface; the optical lens satisfies the following relationship: 1.3mm < Imh ^2/TTL/Fno <1.42mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, Imgh is half of the diagonal length of the effective pixel area on the imaging surface of the optical lens, and Fno is the diaphragm number of the optical lens. The optical lens, the camera module and the electronic equipment provided by the invention can meet the requirements of light, thin and small design, improve the image quality feeling of the optical lens and improve the resolution and imaging definition of the optical lens.

Description

Optical lens, camera module and electronic equipment

technical field

The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and an electronic device.

Background technique

At present, with the development of imaging technology, people have higher and higher requirements for the imaging quality of optical lenses, and the structural characteristics of light, thin and miniaturized optical lenses have gradually become the development trend of optical lenses. In the related art, under the design trend of light, thin and miniaturized optical lenses, the image quality of optical lenses is poor, the resolution is low, and the imaging quality of optical lenses is not clear enough, so it is difficult to meet people's high-definition imaging requirements for optical lenses. .

SUMMARY OF THE INVENTION

The embodiment of the present invention discloses an optical lens, a camera module and an electronic device, which can improve the image quality of the optical lens, and improve the resolution and imaging clarity of the optical lens while realizing the light, thin and miniaturized design of the optical lens. .

In order to achieve the above object, in a first aspect, the present invention discloses an optical lens, the optical lens includes a first lens, a second lens, a third lens, and a fourth lens arranged in sequence from the object side to the image side along the optical axis , the fifth lens and the sixth lens;

The first lens has a positive refractive power, the object side of the first lens is convex at the near optical axis, and the image side of the first lens is concave at the near optical axis;

The second lens has a negative refractive power, the object side of the second lens is convex at the near optical axis, and the image side of the second lens is concave at the near optical axis;

the third lens has refractive power;

the fourth lens has refractive power;

the fifth lens has refractive power;

The sixth lens has negative refractive power, and the image side surface of the sixth lens is concave at the near optical axis;

The optical lens satisfies the following relationship:

1.3mm<Imgh^2/TTL/Fno<1.42mm;

Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, Imgh is half the diagonal length of the effective pixel area on the imaging surface of the optical lens, Fno is the aperture number of the optical lens.

The optical lens provided by the present application includes a combination of a first lens with a positive inflection force and a second lens with a negative inflection force, which is beneficial to correct the spherical aberration of the optical lens on the optical axis and improve the resolution; The object sides are convex at the optical axis, and the image sides of the two are concave at the optical axis, which is conducive to the convergence of the light of the optical lens and improves the optical performance of the optical lens; at the same time, the optical lens also includes a negative bending force. The sixth lens is provided, and the object side of the sixth lens is convex at the optical axis, which can help correct the field curvature of the optical lens and improve the optical performance of the optical lens.

That is to say, in the optical lens provided by this application, by selecting an appropriate number of lenses and rationally configuring the refractive power and surface shape of each lens, the optical lens can satisfy the following relationship: 1.3mm<Imgh^2/TTL/ When Fno<1.42mm, while realizing the light, thin and miniaturized design of the optical lens, on the one hand, it is beneficial to make the optical lens have the characteristics of a large image area, improve the picture quality of the optical lens, and The resolution and imaging clarity of the optical lens are improved, so that the optical lens has a better imaging effect and meets people's high-definition imaging requirements for the optical lens. On the other hand, it is also beneficial to make the optical lens have the characteristics of a large aperture and a larger amount of light entering, which not only enables the optical lens to obtain more scene content, enriches the imaging information of the optical lens, but also enables the optical lens to obtain more scene content. It can improve the shooting conditions in dark light, so that while achieving high-quality and high-definition shooting effects, it is suitable for shooting in dark light environments such as night scenes, rainy days, and starry sky, and has better blur effect.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: TTL/Imgh<1.3.

When the above relationship is satisfied, it is beneficial to make the structure of the optical lens more compact, have ultra-thin characteristics, and meet the design requirements for miniaturization; and when the upper limit of the relationship is exceeded, the total optical length of the optical lens (that is, the first The distance from the object side of a lens to the imaging surface of the optical lens on the optical axis) is too long, which is not conducive to the miniaturization of the optical lens.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0.3<|f2/f6|<5;

Wherein, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.

By reasonably controlling the ratio of the effective focal lengths of the second lens and the sixth lens, the spherical aberration contribution of the second lens and the sixth lens can be reasonably distributed, so that the imaging surface of the optical lens can be The effective pixel area has good imaging quality.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: Fno<2.0.

The above-mentioned relational formula is used to ensure that the optical lens has the characteristics of a large aperture, so that the optical lens has sufficient light input, which is conducive to making the captured image of the optical lens clearer, and is conducive to realizing the High-quality shooting and clear imaging in object space scenes with low brightness such as night scenes and starry sky.

As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: 0.1<D5/CT6<0.7;

Wherein, D5 is the air gap on the optical axis between the fourth lens and the fifth lens, and CT6 is the thickness of the sixth lens on the optical axis.

By reasonably controlling the ratio between the air gap between the fourth and fifth lenses on the optical axis and the thickness of the sixth lens on the optical axis within a certain range, the The high-level aberrations generated by the optical lens are beneficial to properly adjust the field curvature of the optical lens during engineering production, and improve the imaging quality of the optical lens.

As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: 1.5<R4/R5<5;

Wherein, R4 is the radius of curvature of the object side of the second lens at the optical axis, and R5 is the radius of curvature of the image side of the second lens at the optical axis.

By reasonably controlling the ratio of the curvature radius of the object side and the image side of the second lens at the optical axis, the aberration of the optical lens can be effectively balanced, the sensitivity of the optical lens can be reduced, and the optical lens can be improved. Optical performance of the lens.

As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: 0.3<SAG51/CT5<1.0;

Wherein, SAG51 is the distance from the intersection of the object side of the fifth lens and the optical axis to the maximum effective radius of the object side of the fifth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis .

The above-mentioned relational expression is limited, which facilitates the processing and molding of the fifth lens, reduces the sensitivity of manufacturing, and enables better manufacturing. When it is lower than the lower limit of the above relationship, the sag height of the fifth lens is relatively low, which will affect the optical performance of the optical lens; and when the upper limit of the above relationship is exceeded, the fifth lens will be relatively difficult to manufacture. , thereby increasing the manufacturing difficulty and manufacturing cost of the optical lens.

As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational formula: 2<(R11+R12)/(R11-R12)<7;

Wherein, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, and R12 is the radius of curvature of the image side of the sixth lens at the optical axis.

Through the above relationship, the radius of curvature of the object side of the sixth lens at the optical axis and the radius of curvature of the image side of the sixth lens at the optical axis can be more suitable, so that the shape of the sixth lens can be guaranteed. The astigmatism of the optical lens can also be effectively improved, and the optical performance of the optical lens can be improved.

As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0.2<f6/(f1+f2)<3;

Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.

The above relationship is defined to control the ratio of the effective focal length of the sixth lens to the sum of the effective focal lengths of the first and second lenses within a certain range, so that the first lens, the The spherical aberration contribution of the second lens and the sixth lens enables the effective pixel area on the imaging surface of the optical lens to have good imaging quality.

In a second aspect, the present invention discloses a camera module. The camera module includes a photosensitive chip and the optical lens according to the first aspect above, and the photosensitive chip is disposed on the image side of the optical lens. The camera module with the optical lens can meet the requirements of light, thin and miniaturized design, and at the same time, it is beneficial to make the camera module have the characteristics of a large image surface, improve the picture quality, and improve the resolution and imaging clarity. At the same time, it is also beneficial to make the optical lens have the characteristics of a large aperture and a larger amount of light input, which can improve the shooting conditions in dark light, thereby effectively improving the shooting quality of the camera module in a dark light environment, which is conducive to being suitable for night scenes. , rainy days, starry sky and other dark light environments.

In a third aspect, the present invention further discloses an electronic device, the electronic device includes a casing and the camera module according to the second aspect above, and the camera module is arranged on the casing. The electronic device with the camera module can meet the requirements of light, thin and miniaturized design, and at the same time, it is beneficial to make the camera module have the characteristics of a large image area, improve the picture quality, and improve the resolution and imaging clarity. At the same time, it is also beneficial to make the optical lens have the characteristics of a large aperture and a larger amount of light input, which can improve the shooting conditions in dark light, thereby effectively improving the shooting quality of the camera module in a dark light environment, which is conducive to being suitable for night scenes. , rainy days, starry sky and other dark light environments.

Compared with the prior art, the beneficial effects of the present invention are:

In the optical lens, camera module, and electronic equipment provided by the embodiments of the present invention, the optical lens adopts six-piece lenses, and the number of lenses used is relatively small, which is conducive to realizing the light, thin, and miniaturized design of the optical lens, and can be used for each lens. The refractive power and surface shape of the lens are designed, and at the same time, the optical lens satisfies the following relationship: 1.3mm<Imgh^2/TTL/Fno<1.42mm, it can realize the thin and small design of the optical lens, and at the same time, it is beneficial to The optical lens has the characteristics of a large image surface, improves the image quality of the optical lens, and improves the resolution and imaging clarity of the optical lens, so that the optical lens has a better imaging effect and meets people's high-definition imaging requirements for optical lenses. Further, it is also beneficial to make the optical lens have the characteristics of a large aperture, with a larger amount of light input, which can improve the shooting conditions in dark light, so that it can achieve high-quality and high-definition shooting effects, and is suitable for night scenes, rainy days, etc. Shooting in dark light environment such as starry sky, and has better blur effect.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of an optical lens disclosed in a first embodiment of the present application;

2 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the first embodiment of the present application;

3 is a schematic structural diagram of an optical lens disclosed in a second embodiment of the present application;

4 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the second embodiment of the present application;

5 is a schematic structural diagram of an optical lens disclosed in a third embodiment of the present application;

6 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the third embodiment of the present application;

7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

8 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the fourth embodiment of the present application;

9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

10 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the fifth embodiment of the present application;

11 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

12 is a ray spherical aberration diagram (mm), an astigmatism curve diagram (mm) and a distortion curve diagram (%) of the optical lens disclosed in the fifth embodiment of the present application;

13 is a schematic structural diagram of a camera module disclosed in the present application;

FIG. 14 is a schematic structural diagram of the electronic device disclosed in the present application.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", The orientation or positional relationship indicated by "vertical", "horizontal", "horizontal", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are primarily used to better describe the invention and its embodiments, and are not intended to limit the fact that the indicated device, element or component must have a particular orientation, or be constructed and operated in a particular orientation.

In addition, some of the above-mentioned terms may be used to express other meanings besides orientation or positional relationship. For example, the term "on" may also be used to express a certain attachment or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific situations.

Furthermore, the terms "installed", "arranged", "provided", "connected", "connected" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or a unitary structure; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediary, or between two devices, elements, or components. internal communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and configurations may be the same or different), and are not used to indicate or imply the indicated devices, elements, etc. or the relative importance and number of components. Unless stated otherwise, "plurality" means two or more.

The technical solutions of the present invention will be further described below with reference to the embodiments and the accompanying drawings.

Referring to FIG. 1 , according to a first aspect of the present application, the present application discloses an optical lens 100 . The optical lens 100 includes a first lens L1 and a second lens arranged in sequence from the object side to the image side along the optical axis O L2, third lens L3, fourth lens L4, fifth lens L5, and sixth lens L6. During imaging, the light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1 and finally forms an image on the optical lens 100 on the imaging plane 101. Among them, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3, the fourth lens L4 and the fifth lens L5 have a refractive power (for example, a positive refractive power or a negative refractive power), the sixth lens Lens L6 has negative refractive power.

Further, the object side S1 of the first lens L1 can be convex at the near optical axis O, the image side S2 of the first lens L1 can be concave at the near optical axis O, and the object side S3 of the second lens L2 can be at the low beam. The axis O can be convex, the image side S4 of the second lens L2 can be concave or concave at the near optical axis O, the object side S5 of the third lens L3 can be convex or concave at the near optical axis O, and the third lens L3 can be convex or concave. The image side S6 of the lens L3 can be convex or concave at the near optical axis O, the object side S7 of the fourth lens L4 can be convex or concave at the near optical axis O, and the image side S8 of the fourth lens L4 is at the near optical axis. O can be convex or concave, the object side S9 of the fifth lens L5 can be convex or concave at the near optical axis O, the image side S10 of the fifth lens L5 can be convex or concave at the near optical axis O, and the sixth lens L5 can be convex or concave. The object side S11 of the lens L6 may be convex or concave at the near optical axis O, and the image side S12 of the sixth lens L6 may be concave at the near optical axis O.

It can be seen from the above that the optical lens 100 includes a combination of a first lens L1 with a positive inflection force and a second lens L2 with a negative inflection force, which is beneficial to correct the spherical aberration of the optical lens 100 at the optical axis O; The third lens L3 and the fourth lens L4 with refractive power are beneficial to correct the astigmatism and coma of the optical lens 100; the fifth lens L5 with positive refractive power is also included, which is beneficial to realize the miniaturization requirements of the optical lens 100; Including the sixth lens L6 with negative bending power is beneficial to correct the curvature of field of the optical lens 100 .

Further, the object side S1 of the first lens L1 and the object side S3 of the second lens L2 are convex surfaces at the near optical axis O, and the image side S2 of the first lens L1 and the image side S4 of the second lens L2 are near the optical axis O. The optical axis O is all concave, which is conducive to the convergence of the optical lens light and improves the optical performance of the optical lens 100; the object side S5 of the third lens L3 and the object side S7 of the fourth lens L4 can be both at the near optical axis O. The concave surface is conducive to reducing the sensitivity of the optical lens 100 and is conducive to the engineering manufacture of the optical lens 100; the object side S9 of the fifth lens L5 and the object side S11 of the sixth lens L6 can be convex at the near optical axis O, and there are It is beneficial to correct the field curvature of the optical lens 100 and improve the optical performance of the optical lens 100 .

Considering that the optical lens 100 is mostly used in electronic devices such as in-vehicle devices and driving recorders, or in automobiles. When the optical lens 100 is used as a camera on a car body, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be plastic, Therefore, while the optical lens 100 has good optical effects, the overall weight of the optical lens 100 can also be reduced. Meanwhile, the aforementioned first lens L1 , second lens L2 , third lens L3 , fourth lens L4 , fifth lens L5 and sixth lens L6 can all be aspherical.

In addition, it can be understood that in other embodiments, when the optical lens 100 can be applied to electronic devices such as smart phones and smart tablets, the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L3 and the fourth lens The material of the lens L4, the fifth lens L5 and the sixth lens L6 can also be made of plastic or glass, and each lens can also be made of aspherical or spherical surfaces.

In some embodiments, the optical lens 100 further includes a diaphragm 102, which may be an aperture diaphragm or a field diaphragm, and may be disposed between the object side of the optical lens 100 and the object side S1 of the first lens L1. It can be understood that, in other embodiments, the diaphragm 102 can also be arranged between two adjacent lenses, for example, between the second lens L2 and the third lens L3, and the setting can be adjusted according to the actual situation. The embodiment does not specifically limit this.

In some embodiments, the optical lens 100 further includes a filter L7, such as an infrared filter, and the infrared filter is disposed between the image side S12 of the sixth lens L6 and the imaging surface 101 of the optical lens 100, so that the filter can be filtered out. The optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also image in a dark environment and other special application scenarios Can get better image effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.3mm<Imgh^2/TTL/Fno<1.42mm; wherein, TTL is the distance between the object side S1 of the first lens L1 and the imaging plane 101 of the optical lens 100 on the optical axis The distance on O, Imgh is half of the diagonal length of the effective pixel area on the imaging surface 101 of the optical lens 100 , and Fno is the aperture number of the optical lens 100 . When the above relationship is satisfied, on the basis of satisfying the ultra-thin and miniaturized design, on the one hand, it is beneficial to make the optical lens 100 have the characteristics of a large image surface, improve the image quality of the optical lens 100, and improve the resolution of the optical lens 100. In addition, the optical lens 100 can not only obtain more scene content, but also enrich the optical lens 100’s high-definition imaging effect. The imaging information is also beneficial to make the optical lens 100 have the characteristics of a large aperture and a larger amount of light input, which can improve the shooting conditions in dark light, so that it can achieve high-quality and high-definition shooting effects, and is suitable for night scenes. , rainy days, starry sky and other dark light environments, and have better blur effect.

However, when it is lower than the lower limit of the above relationship, it is not conducive to the ultra-thin and miniaturized design of the optical lens 100, and it is not conducive to making the optical lens 100 have a large aperture, and when the upper limit of the above relationship is exceeded, the optical lens 100 is difficult To obtain better optical performance, it is difficult to make the optical lens 100 meet the imaging requirements of high pixels, which is not conducive to capturing the details of the subject.

In some embodiments, the optical lens 100 satisfies the following relationship: TTL/Imgh<1.3. By the above-mentioned relational expression, it is beneficial to make the optical lens 100 more compact in structure, with ultra-thin characteristics, and meet the design requirements of miniaturization; and when the upper limit of the relational expression is exceeded, the total optical length of the optical lens 100 (that is, the first lens The distance from the object side surface S1 of L1 to the imaging surface of the optical lens 100 on the optical axis) is too long, which is not conducive to the miniaturization of the optical lens 100 .

In some embodiments, the optical lens 100 satisfies the following relationship: 0.3<|f2/f6|<5; wherein, f2 is the effective focal length of the second lens L2, and f6 is the effective focal length of the sixth lens L6. By reasonably controlling the ratio of the effective focal lengths of the second lens L2 and the sixth lens L6, the spherical aberration contribution of the second lens L2 and the sixth lens L6 can be reasonably distributed, so that the effective pixel area on the imaging surface 100 of the optical lens 100 has Good imaging quality. When it is lower than the lower limit of the above relationship, it will increase the difficulty of correcting aberrations by the optical lens 100; and when the upper limit of the relationship is exceeded, it is not conducive to the optical lens 100 to obtain the optical information of the object space, making the imaging effect difficult meet the expected requirements.

In some embodiments, the optical lens 100 satisfies the following relation: Fno<2.0. The above-mentioned relational expressions are used to ensure that the optical lens 100 has the characteristics of a large aperture, so that the optical lens 100 has a sufficient amount of light, which is conducive to making the captured image of the optical lens 100 clearer, and is conducive to realizing night scenes and starry sky. High-quality shooting and sharp imaging in object-space scenes with low brightness.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.1<D5/CT6<0.7; wherein, D5 is the air gap between the fourth lens L4 and the fifth lens L5 on the optical axis O, and CT6 is the sixth lens The thickness of L6 on the optical axis O.

By reasonably controlling the ratio of the air gap between the fourth lens L4 and the fifth lens L5 on the optical axis O to the thickness of the sixth lens L6 on the optical axis O within a certain range, the optical lens 100 can effectively balance the It is beneficial to properly adjust the field curvature of the optical lens 100 during engineering production, and improve the imaging quality of the optical lens 100. When the lower limit of the relationship is lower than that of the above-mentioned relationship, the high-level aberrations of the optical lens 100 are difficult to balance, which affects the imaging quality. Light angle matching.

In some embodiments, the optical lens 1 satisfies the following relationship: 1.5<R4/R5<5; wherein, R4 is the radius of curvature of the object side surface S3 of the second lens L2 at the optical axis O, and R5 is the image of the second lens L2. The radius of curvature of the side surface S4 at the optical axis O.

By reasonably controlling the ratio of the curvature radius of the object side S3 of the second lens L2 and the image side S4 of the second lens L2 at the optical axis O, the aberration of the optical lens 100 can be effectively balanced and the sensitivity of the optical lens 100 can be reduced , to improve the optical performance of the optical lens 100 . However, when the lower limit of the relational expression is lower than the above-mentioned lower limit, the sensitivity of the optical lens 100 will increase, which is not conducive to engineering manufacturing. The 100 has poor optics.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.0<TTL/f<1.5; wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface 100 of the optical lens 100 on the optical axis O, f is the effective focal length of the optical lens 100.

By the above relationship, it is beneficial to shorten the total optical length of the optical lens 100, making the structure of the optical lens 100 more compact, and at the same time, it is also beneficial to avoid the field angle of the optical lens 100 from being too large, so that the optical lens 100 can be used in miniaturized design and There is a balance between reducing aberrations caused by large fields of view. However, when it is lower than the lower limit of the above relational expression, the total optical length of the optical lens 100 is too short, which will increase the sensitivity of the optical lens 100 , making it difficult to correct the aberration of the optical lens 100 , or cause the field of view of the optical lens 100 If the angle is too small, it is difficult to meet the characteristics of the large field of view. However, when the upper limit of the relational expression is exceeded, the total optical length of the optical lens 100 is too long, which is not conducive to the miniaturization design, and it is difficult for the light of the edge field of view to be imaged on the effective imaging area of the imaging surface 101, which will result in incomplete imaging information and affect the image quality.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.3<SAG51/CT5<1.0; wherein, SAG51 is the distance on the optical axis O from the intersection of the object side S9 of the fifth lens L5 and the optical axis O to the maximum effective radius of the object side S9 of the fifth lens L5, CT5 is the thickness of the fifth lens L5 on the optical axis O. The above-mentioned relational expression is limited, which facilitates the processing and molding of the fifth lens L5, reduces the sensitivity of manufacturing, and can better realize engineering manufacturing. When it is lower than the lower limit of the above relationship, the sag height of the fifth lens L5 is low, which will affect the optical performance of the optical lens 100. The imaging resolution capability of the lens 100 will ultimately affect the picture quality; and when the upper limit of the relational expression is exceeded, it will not only make it relatively difficult to manufacture the fifth lens L5, but also cause insufficient light input into the optical lens 100 and insufficient relative brightness of the light, thus Causes the picture clarity to drop.

In some embodiments, the optical lens 100 satisfies the following relationship:

2<(R12+R13)/(R12-R13)<7; wherein, R12 is the curvature radius of the object side S11 of the sixth lens L6 at the optical axis O, and R13 is the image side S12 of the sixth lens L6 at the optical axis Radius of curvature at O.

By the above-mentioned relational formula, the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O and the radius of curvature of the image side surface S12 at the optical axis O can be more suitable, so that the shape of the sixth lens L6 can be guaranteed. In addition, the astigmatism of the optical lens 100 can be effectively improved, and the optical performance of the optical lens 100 can be improved. However, when it is lower than the lower limit of the above relationship, the aberration generated by the sixth lens L6 is difficult to correct, which affects the optical performance of the optical lens 100; Stability of lens assembly.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.2<f6/(f1+f2)<3; wherein, f1 is the effective focal length of the first lens L1, f2 is the effective focal length of the second lens L2, and f6 is the first Effective focal length of the six-lens L6.

Through the above relationship, the ratio of the effective focal length of the sixth lens L6 to the sum of the effective focal lengths of the first lens L1 and the second lens L2 can be controlled within a certain range, so that the first lens L1 and the second lens can be allocated reasonably The spherical aberration contribution of L2 and the sixth lens L6 makes the effective pixel area on the imaging surface 101 of the optical lens 100 have good imaging quality.

The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

first embodiment

A schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application is shown in FIG. 1 . The optical lens 100 includes a first lens L1 , a second lens L2 , and a diaphragm that are sequentially arranged along the optical axis O from the object side to the image side. 102. The third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a negative refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L5 has a positive refractive power. Lens L6 has negative refractive power.

Further, the object side S1 and the image side S2 of the first lens L1 are convex and concave respectively at the near optical axis O; the object side S1 and the image side S2 of the first lens L1 are convex at the circumference. The object side S3 and the image side S4 of the second lens L2 are convex and concave respectively at the near optical axis O; the object side S3 and the image side S4 of the second lens L2 are concave and convex respectively at the circumference. The object side S5 and the image side S6 of the third lens L3 are convex at the near optical axis O; the object side S5 and the image side S6 of the third lens L3 are concave and convex respectively at the circumference. The object side S7 and the image side S8 of the fourth lens L4 are convex and concave respectively at the near optical axis O; the object side S7 and the image side S8 of the fourth lens L4 are concave and convex respectively at the circumference. The object side S9 and the image side S10 of the fifth lens L5 are convex and concave respectively at the near optical axis O; the object side S9 and the image side S10 of the fifth lens L5 are concave and convex respectively at the circumference. The object side S11 and the image side S12 of the sixth lens L6 are convex and concave respectively at the near optical axis O; the object side S11 and the image side S12 of the sixth lens L6 are concave and convex respectively at the circumference.

Specifically, the effective focal length of the optical lens 100 is f=3.49mm, the field of view angle of the optical lens 100 FOV=87.4°, the total optical length of the optical lens 100 TTL=4.2mm, and the aperture size FNO=1.95 as For example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis O of the optical lens 100 from the object side to the image side are sequentially arranged in the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 2 and 3 correspond to the object side S1 and the image side of the first lens L1 respectively. S2. The Y radius in Table 1 is the curvature radius of the object side or image side of the corresponding surface number at the near optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side of the lens to the rear surface on the optical axis O. The value of the diaphragm 102 in the "thickness" parameter column is the distance from the diaphragm 102 to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the object side of the first lens L1 is to the last surface. The direction of the side of the mirror image is the positive direction of the optical axis O. When the value is negative, it means that the diaphragm 102 is set on the right side of the vertex of the latter surface. If the thickness of the diaphragm 102 is positive, the diaphragm 102 is behind The left side of a surface vertex. It can be understood that the units of Y radius, thickness and focal length in Table 1 are all mm. In addition, the reference wavelength of the refractive index and Abbe number of each lens in Table 1 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

Table 1

In the first embodiment, the object side and the image side of any one of the first lens L1 to the sixth lens L6 are aspherical surfaces, and the surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical surface formulas :

Among them, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1/R (that is, the paraxial curvature c is the above table 1 is the reciprocal of the Y radius R); k is the conic coefficient; Ai is the correction coefficient corresponding to the higher-order term of the i-th term of the aspheric surface. Table 2 gives the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the respective aspheric mirror surfaces S1-S16 in the first embodiment.

Table 2

Please refer to (A) in FIG. 2 , which shows the spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm . In (A) of FIG. 2 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 2 that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 2 . (B) in FIG. 2 is a light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 2 that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 2 . (C) in FIG. 2 is a distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. As can be seen from (C) in FIG. 2 , at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Second Embodiment

Please refer to FIG. 3 , which is a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application. The optical lens 100 includes a first lens L1 , a second lens L2 , a diaphragm 102 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L6 , which are sequentially arranged along the optical axis O from the object side to the image side. and filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, in the second embodiment, the refractive power of each lens differs from the refractive power of each lens in the first embodiment in that the third lens L3 has a negative refractive power. Meanwhile, in the second embodiment, the difference between the surface type of each lens and the surface type of each lens in the first embodiment is that the object side S5 and the image side S6 of the third lens L3 at the near optical axis O are respectively Convex and Concave.

In the second embodiment, the effective focal length of the optical lens 100 is f=3.54mm, the FOV of the field of view of the optical lens 100 is 86.6°, the total optical length of the optical lens 100 is TTL=4.2mm, and the aperture size FNO=1.94 as an example .

Other parameters in the second embodiment are given in Table 3 below, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, which will not be repeated here. It can be understood that the units of Y radius, thickness and focal length in Table 3 are all mm. In addition, the reference wavelength of the refractive index and Abbe number of each lens in Table 3 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

table 3

In the second embodiment, Table 4 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Table 4

Further, please refer to FIG. 4(A) , which shows the spherical aberration curves of the optical lens 100 in the second embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm. In (A) of FIG. 4 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 4 that the spherical aberration value of the optical lens 100 in the second embodiment is better, which indicates that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 4 . (B) in FIG. 4 is a light astigmatism diagram of the optical lens 100 in the second embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 4 that the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 4 . (C) in FIG. 4 is a distortion curve diagram of the optical lens 100 in the second embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. As can be seen from (C) in FIG. 4 , at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Third Embodiment

Please refer to FIG. 5 , which is a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application. The optical lens 100 includes a first lens L1 , a second lens L2 , a diaphragm 102 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L6 , which are sequentially arranged along the optical axis O from the object side to the image side. and filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, in the third embodiment, the refractive power of each lens differs from the refractive power of each lens in the first embodiment in that the fourth lens L4 has a positive refractive power. Meanwhile, in the third embodiment, the difference between the surface type of each lens and the surface type of each lens in the first embodiment is that the object side S5 and the image side S6 of the third lens L3 at the near optical axis O are respectively Convex and Concave.

In the third embodiment, the effective focal length of the optical lens 100 is f=3.5mm, the field of view of the optical lens 100 is FOV=87.4°, the total optical length of the optical lens 100 is TTL=4.24mm, and the aperture size FNO=1.95 as an example .

Other parameters in the third embodiment are given in the following Table 5, and the definitions of the parameters can be obtained from the foregoing description, which will not be repeated here. It can be understood that the units of Y radius, thickness and focal length in Table 5 are all mm. In addition, the reference wavelength of the refractive index and Abbe number of each lens in Table 5 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

table 5

In the third embodiment, Table 6 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Table 6

Further, please refer to (A) in FIG. 6 , which shows the spherical aberration curve of light of the optical lens 100 in the third embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm. In (A) of FIG. 6 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 6 that the spherical aberration value of the optical lens 100 in the third embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 6 . (B) in FIG. 6 is a light astigmatism diagram of the optical lens 100 in the third embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 6 that the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 6 . (C) in FIG. 6 is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. It can be seen from (C) in FIG. 6 that at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Fourth Embodiment

Please refer to FIG. 7 , which is a schematic structural diagram of an optical lens 100 disclosed in a fourth embodiment of the present application. The optical lens 100 includes a first lens L1 , a second lens L2 , a diaphragm 102 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L6 , which are sequentially arranged along the optical axis O from the object side to the image side. and filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, in the fourth embodiment, the refractive power of each lens differs from the refractive power of each lens in the first embodiment in that the fifth lens L5 has a positive refractive power. Meanwhile, in the fourth embodiment, the difference between the surface type of each lens and the surface type of each lens in the first embodiment is that the object side S5 and the image side S6 of the third lens L3 at the near optical axis O are respectively Convex and concave, the object side S7 and the image side S8 of the fourth lens L4 are concave and convex at the near optical axis O, respectively.

In the fourth embodiment, the focal length of the optical lens 100 is f=3.58mm, the field of view of the optical lens 100 is FOV=86°, the total optical length of the optical lens 100 is TTL=4.3mm, and the aperture size is FNO=1.94.

Other parameters in the fourth embodiment are given in Table 7 below, and the definitions of the parameters can be obtained from the foregoing descriptions, which will not be repeated here. It can be understood that the units of Y radius, thickness and focal length in Table 7 are all mm. In addition, the reference wavelength of the refractive index and Abbe number of each lens in Table 7 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

Table 7

In the fourth embodiment, Table 8 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Table 8

Further, please refer to FIG. 8(A) , which shows the spherical aberration curves of the optical lens 100 in the fourth embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm. In (A) of FIG. 8 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 8 that the spherical aberration value of the optical lens 100 in the fourth embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 8 . (B) in FIG. 8 is a light astigmatism diagram of the optical lens 100 in the fourth embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 8 that the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 8 . (C) in FIG. 8 is a distortion curve diagram of the optical lens 100 in the fourth embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. As can be seen from (C) in FIG. 8 , at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Fifth Embodiment

Please refer to FIG. 9 , which is a schematic structural diagram of an optical lens 100 disclosed in a fifth embodiment of the present application. The optical lens 100 includes a first lens L1 , a second lens L2 , a diaphragm 102 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L6 , which are sequentially arranged along the optical axis O from the object side to the image side. and filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, the refractive power of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the description of the above-mentioned first embodiment, which will not be repeated here. Meanwhile, in the fifth embodiment, the difference between the surface shape of each lens and the surface shape of each lens in the first embodiment is that the object side S5 and the image side S6 of the third lens L3 at the near optical axis O are respectively Convex and Concave.

In the fifth embodiment, the focal length f=3.52mm of the optical lens 100, the FOV of the field of view of the optical lens 100=87°, the total optical length of the optical lens 100 TTL=4.25mm, and the aperture size FNO=1.89 are taken as examples.

Other parameters in the fifth embodiment are given in the following Table 9, and the definitions of the parameters can be obtained from the foregoing descriptions, which will not be repeated here. It can be understood that the units of Y radius, thickness and focal length in Table 9 are all mm. In addition, the reference wavelength of the refractive index and Abbe number of each lens in Table 9 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

Table 9

In the fourth embodiment, Table 10 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Table 10

Further, please refer to FIG. 10(A) , which shows the spherical aberration curves of the optical lens 100 in the fifth embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm. In (A) of FIG. 10 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 10 that the spherical aberration value of the optical lens 100 in the fifth embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 10 . (B) in FIG. 10 is a light astigmatism diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 10 that the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 10 . (C) in FIG. 10 is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. It can be seen from (C) in FIG. 10 that at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Sixth Embodiment

Please refer to FIG. 11 , which is a schematic structural diagram of an optical lens 100 disclosed in a fifth embodiment of the present application. The optical lens 100 includes a first lens L1 , a second lens L2 , a diaphragm 102 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , and a sixth lens L6 , which are sequentially arranged along the optical axis O from the object side to the image side. and filter L7. The materials of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the above-mentioned specific embodiments, and are not repeated here.

Further, the refractive power of the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , the fifth lens L5 and the sixth lens L6 can be referred to the description of the above-mentioned first embodiment, which will not be repeated here. Meanwhile, in the fifth embodiment, the difference between the surface shape of each lens and the surface shape of each lens in the first embodiment is that the object side S5 and the image side S6 of the third lens L3 at the near optical axis O are respectively Concave and convex.

In the sixth embodiment, the focal length f=3.5mm of the optical lens 100, the FOV of the field of view of the optical lens 100=87.4°, the total optical length of the optical lens 100 TTL=4.2mm, and the aperture size FNO=1.97 are taken as examples.

Other parameters in the sixth embodiment are given in Table 11 below, and the definitions of the parameters can be obtained from the foregoing descriptions, which will not be repeated here. It can be understood that the units of Y radius, thickness and focal length in Table 11 are all mm. The reference wavelength of the refractive index and Abbe number of each lens in Table 11 is 587.6 nm, and the reference wavelength of the effective focal length is 555 nm.

Table 11

In the sixth embodiment, Table 12 shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the sixth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Table 12

Further, please refer to FIG. 12(A) , which shows the spherical aberration curve of the optical lens 100 in the fifth embodiment at wavelengths of 435 nm, 470 nm, 510 nm, 555 nm, 610 nm and 650 nm. In (A) of FIG. 12 , the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 10 that the spherical aberration value of the optical lens 100 in the fifth embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

Please refer to (B) in FIG. 12 , and (B) in FIG. 10 is a light astigmatism diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. The abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. The astigmatism curve represents the curvature T of the meridional imaging plane and the curvature S of the sagittal imaging plane. It can be seen from (B) in FIG. 12 that the astigmatism of the optical lens 100 is well compensated.

Please refer to (C) in FIG. 12 , and (C) in FIG. 10 is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 555 nm. Among them, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the image height, and the unit is mm. As can be seen from (C) in FIG. 12 , at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

Please refer to Table 13. Table 13 is a summary of the ratios of the relational expressions in the first to sixth embodiments of the present application.

Table 13

Please refer to FIG. 13 , the present application also discloses a camera module, the camera module 200 includes a photosensitive chip 201 and the optical lens 100 described in any one of the first to sixth embodiments above. The photosensitive chip 201 is disposed on the image side of the optical lens 100 . The optical lens 100 can be used to receive the light signal of the subject and project it to the photosensitive chip 201, and the photosensitive chip 201 can be used to convert the light signal corresponding to the subject into an image signal. I won't go into details here. It can be understood that the camera module 200 having the above-mentioned optical lens 100 can make the optical lens 100 meet the requirements of light, thin and miniaturized design, and at the same time, it is beneficial to make the camera module have the characteristics of a large image area and improve the picture quality. Improve resolution and imaging clarity. At the same time, it is also beneficial to make the optical lens have the characteristics of a large aperture and a larger amount of light input, which can improve the shooting conditions in dark light, thereby effectively improving the shooting quality of the camera module in a dark light environment, which is conducive to being suitable for night scenes. , rainy days, starry sky and other dark light environments. . Since the above technical effects have been described in detail in the embodiment of the optical lens 100 , they will not be repeated here.

Referring to FIG. 14 , the present application also discloses an electronic device. The electronic device 300 includes a casing 301 and the camera module 200 as described above. The camera module 200 is installed in the casing 301 to obtain image information. The electronic device 300 may be, but not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 having the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens 100 . That is, the electronic device 300 can make the optical lens 100 satisfy the light, thin and miniaturized design, and at the same time satisfy the light, thin and miniaturized design, and at the same time make the camera module have the characteristics of a large image area, improve the Picture quality, improve resolution and imaging clarity. At the same time, it is also beneficial to make the optical lens have the characteristics of a large aperture and a larger amount of light input, which can improve the shooting conditions in dark light, thereby effectively improving the shooting quality of the camera module in a dark light environment, which is conducive to being suitable for night scenes. , rainy days, starry sky and other dark light environments. Since the above technical effects have been described in detail in the embodiment of the optical lens 100 , they will not be repeated here.

An optical lens, a camera module and an electronic device disclosed in the embodiments of the present invention have been described in detail above. The principles and implementations of the present invention are described with specific examples in this paper. The descriptions of the above embodiments are only used to help Understand the optical lens, camera module, electronic device and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. Above, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. An optical lens, characterized in that the optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens that are sequentially arranged along the optical axis from the object side to the image side lens; The first lens has a positive refractive power, the object side of the first lens is convex at the near optical axis, and the image side of the first lens is concave at the near optical axis; The second lens has a negative refractive power, the object side of the second lens is convex at the near optical axis, and the image side of the second lens is concave at the near optical axis; the third lens has refractive power; the fourth lens has refractive power; the fifth lens has refractive power; The sixth lens has negative refractive power, and the image side surface of the sixth lens is concave at the near optical axis; The lens with refractive power of the optical lens is the above-mentioned six lenses; The optical lens satisfies the following relationship: 1.3mm<Imgh^2/TTL/Fno<1.42mm; TTL/Imgh<1.3; Wherein, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, Imgh is half the diagonal length of the effective pixel area on the imaging surface of the optical lens, Fno is the aperture number of the optical lens. 2. The optical lens according to claim 1, wherein the optical lens satisfies the following relation: 0.3<|f2/f6|<5; Wherein, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens. 3. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expression: Fno<2.0. 4. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expression: 0.1<D5/CT6<0.7; Wherein, D5 is the air gap on the optical axis between the fourth lens and the fifth lens, and CT6 is the thickness of the sixth lens on the optical axis. 5. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expression: 1.5<R4/R5<5; Wherein, R4 is the radius of curvature of the object side of the second lens at the optical axis, and R5 is the radius of curvature of the image side of the second lens at the optical axis. 6. The optical lens according to claim 1, wherein the optical lens satisfies the following relational expression: 0.3<SAG51/CT5<1.0; Wherein, SAG51 is the distance from the intersection of the object side of the fifth lens and the optical axis to the maximum effective radius of the object side of the fifth lens on the optical axis, and CT5 is the thickness of the fifth lens on the optical axis . 7. The optical lens according to claim 1, wherein the optical lens satisfies the following relation: 2<(R12+R13)/(R12-R13)<7; Wherein, R12 is the radius of curvature of the object side of the sixth lens at the optical axis, and R13 is the radius of curvature of the image side of the sixth lens at the optical axis. 8. The optical lens according to claim 1, wherein the optical lens satisfies the following relation: 0.2<f6/(f1+f2)<3; Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens. 9 . A camera module, characterized in that the camera module comprises a photosensitive chip and the optical lens according to any one of claims 1 to 8 , and the photosensitive chip is disposed on the image side of the optical lens. 10 . An electronic device, characterized in that, the electronic device comprises a casing and a camera module according to claim 9 , wherein the camera module is arranged on the casing. 11 .

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