CN212989754U

CN212989754U - Optical lens, camera module and electronic equipment

Info

Publication number: CN212989754U
Application number: CN202021936306.5U
Authority: CN
Inventors: 华露; 杨健; 李明; 邹海荣
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-04-16
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses an optical lens, module and electronic equipment make a video recording, optical lens include along first lens, second lens, third lens, fourth lens, fifth lens and the sixth lens that the optical axis set gradually from the thing side to picture side, first lens has positive refractive power, the second lens has refractive power, the third lens has negative refractive power, the fourth lens has refractive power, the fifth lens has positive refractive power, the sixth lens has negative refractive power, optical lens satisfies following relation: 0.05 < ImgH/ObjH <1. The embodiment of the utility model provides an optical lens, module and electronic equipment make a video recording, this optical lens adopts six formula lens to the power of refracting to each lens, face type and optical lens's magnification are injectd, thereby can realize the detail to the object of microspur within range and shoot, realize high definition formation of image, effectively improve the shooting effect, satisfy high-quality shooting requirement.

Description

Optical lens, camera module and electronic equipment

Technical Field

The utility model relates to an optical imaging technology field especially relates to an optical lens, module and electronic equipment make a video recording.

Background

In recent years, with the progress of the scientific and technological industry, imaging technology is continuously developed, and optical lenses for optical imaging are widely applied to electronic devices such as smart phones, tablet computers, video cameras and the like. Taking a smart phone as an example, in order to improve the shooting effect and to capture a high-quality, high-resolution, and high-definition picture with a miniature imaging element, a camera capable of shooting high quality is often mounted on the smart phone. However, under the trend of miniaturization and lightness of smart phones, the cameras also need to meet the micro-design, but the micro-designed cameras have the problems of poor macro-shooting effect, low shooting pixels and the like, and cannot meet the high-quality shooting requirement of electronic equipment.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model discloses optical lens, module and electronic equipment make a video recording can improve the microspur and shoot the effect and improve and shoot the pixel when realizing optical lens's miniaturized design to satisfy high-quality shooting requirement.

In order to achieve the above object, in a first aspect, the present invention discloses an optical lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in order 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 convex image-side surface at paraxial region thereof;

the second lens element with refractive power;

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

the fourth lens element with refractive power;

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

the sixth lens element with negative refractive power has a convex object-side surface and a concave image-side surface at paraxial region, respectively;

the optical lens satisfies the following relationship:

0.05＜ImgH/ObjH＜1；

wherein ImgH is half of the image height corresponding to the maximum field angle of the optical lens, and ObjH is half of the object height corresponding to the maximum field angle of the optical lens.

In the optical lens provided by this embodiment, six lens elements are adopted, and by setting the convex-concave design of the refractive power, the object side surface and the image side surface of each lens element, and when the relationship of ImgH/ObjH being greater than 0.05 and less than 1 is satisfied, the magnification of the optical lens can be effectively improved, so that detailed shooting of an object in a macro range can be realized, high-definition imaging can be realized, the shooting effect can be effectively improved, and the high-quality shooting requirement can be satisfied.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.5< Tobj/TTL < 15;

wherein, Tobj is the object distance of the optical lens, and TTL is the distance from the object side surface of the first lens element to the imaging surface of the optical lens on the optical axis.

The ratio of the object distance to the total length TTL of the optical lens is reasonably configured, so that the total length of the optical lens can be shortened, the miniaturization design is realized, and meanwhile, the shooting effect of high pixels and high magnification can be realized by the optical lens under the condition of small object distance.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: FNO is less than or equal to 2.6;

wherein the FNO is the f-number of the optical lens.

The diaphragm number of the optical lens is limited, the large diaphragm characteristic of the optical lens can be further realized on the premise of meeting the miniaturization design of the optical lens, so that the optical lens can shoot in a darker environment, and the shooting definition of the optical lens in the darker environment is improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1< R13/SAG62< 2.5;

wherein R13 is a radius of curvature of the image-side surface of the sixth lens at the optical axis, and SAG62 is a distance between an edge of the image-side surface optically effective area of the sixth lens projected on the optical axis to an intersection of the image-side surface of the sixth lens and the optical axis (i.e., a rise of an edge of the optically effective area of the image-side surface of the sixth lens).

Through rational configuration the ratio of the curvature radius of the image side surface of the sixth lens and the rise of the image side surface of the sixth lens is favorable to adjusting the angle of the chief ray on the one hand and reducing the risk of ghost image on the other hand, the light of the external view field can be excessive to the image side surface of the sixth lens with smaller deflection angle, and meanwhile, the processing difficulty of the sixth lens is also reduced.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 3< f56/(SAG62+ | SAG52|) < 8;

wherein f56 is a combined focal length of the fifth lens and the sixth lens, SAG52 is a distance between an edge of the image-side optically effective area of the fifth lens projected on the optical axis to an intersection of the image-side surface of the fifth lens and the optical axis, and SAG62 is a distance between an edge of the image-side optically effective area of the sixth lens projected on the optical axis to an intersection of the image-side surface of the sixth lens and the optical axis (i.e., a rise of an optically effective area edge of the image-side surface of the sixth lens).

When the above-described relational expressions are satisfied, it is advantageous to improve the workability of the fifth lens and the sixth lens so as to realize the molding and assembling of the lenses.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: (ce1+ ce2+ ce3+ ce4+ ce5+ ce6)/6< 1.4;

the ce1 is a ratio of the center thickness to the edge thickness of the first lens, the ce2 is a ratio of the center thickness to the edge thickness of the second lens, the ce3 is a ratio of the center thickness to the edge thickness of the third lens, the ce4 is a ratio of the center thickness to the edge thickness of the fourth lens, the ce5 is a ratio of the center thickness to the edge thickness of the fifth lens, and the ce6 is a ratio of the center thickness to the edge thickness of the sixth lens.

When the relational expression is satisfied, the sensitivity of the optical lens can be effectively reduced, the processing and assembling difficulty of each lens of the optical lens is reduced, and the processing cost is saved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -4.5< f234/f < -1;

wherein f234 is a combined focal length of the second lens, the third lens and the fourth lens, and f is a focal length of the optical lens.

When the relation formula is satisfied, the aberration generated by the first lens, the fifth lens and the sixth lens behind the first lens can be corrected and balanced, the tolerance sensitivity of each lens can be balanced, and the total length of the optical lens can be shortened.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -2< R12/f6< -0.5;

wherein R12 is a radius of curvature of an object-side surface of the sixth lens at the optical axis, and f6 is a focal length of the sixth lens.

When the relation is satisfied, the angle of the main ray of the internal field of view of the chip can be well matched, and the field curvature astigmatism of the optical lens can be effectively reduced.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.5< (f5+ | f6|)/f < 3;

wherein f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f is the focal length of the optical lens. When the relation is satisfied, the total length of the optical lens can be shortened, the sensitivity of the optical lens can be reduced, the aberration of the optical lens can be well balanced, and the resolving power of the optical lens can be improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, both the object-side surface and the image-side surface of the sixth lens are aspheric, and the object-side surface and/or the image-side surface of the sixth lens are provided with at least one inflection point.

The aspheric lens has the characteristics that: the curvature of the lens varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. Therefore, the sixth lens adopts the aspheric lens, so that the aberration generated during imaging can be eliminated as much as possible, and the imaging quality is improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes a diaphragm and an infrared filter, the diaphragm is disposed between the object plane of the optical lens and the object side of the first lens, and the infrared filter is disposed between the image side surface of the sixth lens and the imaging surface of the optical lens.

In order to ensure the imaging definition of the shot object on the image side, the infrared light in the light passing through the sixth lens can be effectively filtered through the arrangement of the infrared filter, so that the imaging definition of the shot object on the image side is ensured, and the imaging quality is improved. In addition, the diaphragm is arranged between the object surface of the optical lens and the object side of the first lens, so that the imaging quality of the optical lens can be effectively improved.

In a second aspect, the present invention discloses a camera module, which comprises an image sensor and an optical lens according to the above first aspect, wherein the image sensor is disposed on the image side of the optical lens.

The camera module with the optical lens can effectively improve the magnification of the optical lens while meeting the requirement of miniaturization design, thereby realizing detail shooting of objects in a microspur range, realizing high-definition imaging, effectively improving the shooting effect and meeting the high-quality shooting requirement.

A third aspect, the utility model also discloses an electronic equipment, electronic equipment include the casing and as above-mentioned second aspect the module of making a video recording, the module of making a video recording is located the casing. The electronic equipment with the camera module can effectively meet the miniaturization design, and can also effectively improve the magnification of the optical lens, so that the detailed shooting of objects in a microspur range can be realized, high-definition imaging is realized, the shooting effect is effectively improved, and the high-quality shooting requirement is met.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the embodiment of the utility model provides an optical lens, module and electronic equipment make a video recording, this optical lens adopts six formula lens to the power of refracting to each lens, face type and optical lens's magnification are injectd, thereby can realize the detail to the object of microspur within range and shoot, realize high definition formation of image, effectively improve the shooting effect, satisfy high-quality shooting requirement.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

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

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

fig. 4 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 6 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 8 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 10 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 12 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 13 is a schematic structural diagram of an optical lens disclosed in a seventh embodiment of the present application;

fig. 14 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 15 is a schematic structural diagram of the camera module disclosed in the present application;

fig. 16 is a schematic structural diagram of an electronic device disclosed in the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

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

Referring to fig. 1, according to a first aspect of the present application, an optical lens 100 is disclosed, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6, which are disposed in order from an object side to an image side along an optical axis O. During imaging, light enters 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 is finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 with positive refractive power has a first object-side surface L10 and a first image-side surface L12, and the second lens element L2 with positive refractive power has a second object-side surface L20 and a second image-side surface L22. The third lens element L3 with negative refractive power has a third object-side surface L30 and a third image-side surface L32. The fourth lens element L4 with refractive power has a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with positive refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with negative refractive power includes a sixth object-side surface L60 and a sixth image-side surface L62. The sixth object-side surface L60 and the sixth image-side surface L62 are both aspheric, and at least one inflection point is provided on at least one of the sixth object-side surface L60 and the sixth image-side surface L62.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the optical axis O, the second object-side surface L20 is convex or concave at the paraxial region O, and the second image-side surface L22 is convex or concave at the paraxial region O. The third object-side surface L30 is convex or concave at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is convex or concave at the paraxial region O, and the fourth image-side surface L44 is concave or convex at the paraxial region O. The fifth object-side surface L50 is concave or convex at the paraxial region O, and the fifth image-side surface L52 is convex at the paraxial region O. The sixth object-side face L60 and the sixth image-side face L62 are convex and concave, respectively, at the paraxial region.

The first object-side surface L10 and the first image-side surface L12 are concave and convex at a position close to the circumference, the second object-side surface L20 is convex or concave at a position close to the circumference, and the second image-side surface L22 is concave at a position close to the circumference. The third object-side surface L30 is convex or concave at a position close to the circumference, the third image-side surface L32 is convex at a position close to the circumference, the fourth object-side surface L40 is convex at a position close to the circumference, and the fourth image-side surface L44 is concave at a position close to the circumference. The fifth object-side surface L50 is concave at the near circumference, and the fifth image-side surface L52 is convex at the near circumference. The sixth object-side surface L60 and the sixth image-side surface L62 are concave and convex, respectively, near the circumference.

In some embodiments, 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 all be aspheric lenses. The aspheric lens is characterized in that: the curvature of the lens varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration.

In an alternative embodiment, 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 may all be made of plastic, and the plastic lens can effectively reduce the weight of the optical lens 100 and reduce the production cost thereof.

In another alternative embodiment, 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 may all be made of glass, and the glass lens may have better optical performance.

It is understood that, in the six lenses, the material of some lenses may be glass, and the material of other lenses may be plastic. The material settings 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 are not particularly limited in this embodiment as long as the optical performance requirements can be met.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop 102 and/or a field stop 102, which may be disposed between an object plane to an image plane of the optical lens 100. For example, the stop 102 may be located between the object plane of the optical lens 100 and the first object side plane L10 of the first lens L1. It is understood that the diaphragm 102 may be further disposed on any one of the first object-side surface L10, the second object-side surface L20, the third object-side surface L30, the fourth object-side surface L40, the fifth object-side surface L50, the first image-side surface L12, the second image-side surface L22, the third image-side surface L32, the fourth image-side surface L42, and the fifth image-side surface L52, and the specific position may be adjusted according to actual design requirements, which is not limited in this embodiment.

Optionally, in order to improve the imaging quality, the optical lens 100 further includes an infrared filter 70, and the infrared filter 70 is disposed between the sixth image-side surface L62 of the sixth lens L6 and the image side of the optical lens 100. By adopting the arrangement of the infrared filter 70, the infrared light passing through the sixth lens L6 can be effectively filtered, so that the imaging definition of the object on the image side is ensured, and the imaging quality is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: imgH/ObjH is more than 0.05 and less than 1;

wherein ImgH is half of the image height corresponding to the maximum field angle of the optical lens, and ObjH is half of the object height corresponding to the maximum field angle of the optical lens. Alternatively, the ratio of ImgH to ObjH may be approximately 0.058, 0.098, 0.159, 0.322, 0.606, 0.743, 0.950, etc.

It can be understood that, because the ratio of ImgH to ObjH is substantially the magnification of the optical lens, satisfying the above relational expression can effectively improve the magnification of the optical lens, so that the optical lens can implement detail shooting on objects in a macro range, and further can implement high definition imaging, effectively improve the shooting effect of the optical lens, and enable the optical lens to effectively meet the high quality shooting requirement of electronic equipment.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.5< Tobj/TTL < 15;

wherein, Tobj is an object distance of the optical lens, and TTL is a distance on the optical axis from an object-side surface of the first lens element to an image plane of the optical lens (i.e., a total length of the optical lens). Alternatively, the ratio of Tobj to TTL can be 0.52, 0.73, 1.01, 2.06, 4.28, 6.74, 11.84, etc.

In some embodiments, the optical lens 100 satisfies the following relationship: FNO is less than or equal to 2.6; wherein the FNO is the f-number of the optical lens. Optionally, the FNO may take a value of 2.05, 2.2, 2.4, 2.6, or the like, so that the large aperture characteristic of the optical lens may be realized on the premise of maintaining the miniaturization of the optical lens. It can be understood that when the aperture is large, the luminous flux of the optical lens in unit time is also large, so that a clear imaging effect can be achieved even if the optical lens is shot in a dark environment, and the shooting definition in the dark environment is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: the optical lens satisfies the following relation: 1< R13/SAG62<2.5, wherein R13 is a radius of curvature of the image-side surface of the sixth lens at the optical axis, and SAG62 is a distance between a projection of the edge of the image-side surface optically effective area of the sixth lens on the optical axis to an intersection of the image-side surface of the sixth lens and the optical axis (i.e., a rise of the edge of the optically effective area of the image-side surface of the sixth lens). Illustratively, the value of R13/SAG62 can be 1.04, 1.05, 1.38, 1.45, 1.93, 2.07, 2.47, and the like.

Through rational configuration the ratio of the curvature radius of the image side surface of the sixth lens and the rise of the image side surface of the sixth lens is favorable to adjusting the angle of the chief ray on the one hand and reducing the risk of ghost image on the other hand, the light of the external view field can be excessive to the image side surface of the sixth lens with smaller deflection angle, and meanwhile, the processing difficulty of the sixth lens is also reduced. When R13/SAG62 is less than or equal to 1, the rise of the sixth lens is too large, which causes the surface type of the sixth lens to be fluctuated greatly, increases the processing difficulty and causes the molding and assembling difficulty.

In some embodiments, optical lens 100 satisfies the following relationship: 3< f56/(SAG62+ | SAG52|) < 8; wherein f56 is a combined focal length of the fifth lens and the sixth lens, and SAG52 is a distance between an edge of an image-side optically effective area of the fifth lens projected on the optical axis to an intersection of the image-side surface of the fifth lens and the optical axis.

Alternatively, in the above relation, f56/(SAG62+ | SAG52|) may be 3.27, 3.96, 5.28, 5.443, 6.59, 6.68, 7.76, etc.

By properly configuring the ratio of the combined focal length of the fifth lens and the sixth lens to the rise of the image side surfaces of the fifth lens and the sixth lens, the processability of the fifth lens and the sixth lens can be improved, and the molding and assembly of the fifth lens and the sixth lens can be realized. When f56/(SAG62+ | SAG52|) -is less than or equal to 3 or more than or equal to 8, the surface shapes of the fifth lens and the sixth lens in the processing process are difficult to debug, so that the imaging quality cannot be ensured.

In some embodiments, the optical lens 100 satisfies the following relationship: (ce1+ ce2+ ce3+ ce4+ ce5+ ce6)/6< 1.4;

the ce1 is a ratio of the center thickness to the edge thickness of the first lens, the ce2 is a ratio of the center thickness to the edge thickness of the second lens, the ce3 is a ratio of the center thickness to the edge thickness of the third lens, the ce4 is a ratio of the center thickness to the edge thickness of the fourth lens, the ce5 is a ratio of the center thickness to the edge thickness of the fifth lens, and the ce6 is a ratio of the center thickness to the edge thickness of the sixth lens. Optionally, the value of (ce1+ ce2+ ce3+ ce4+ ce5+ ce6)/6 may be 1.14, 1.15, 1.17, 1.19, 1.23, 1.35, and the like, as long as the value is less than 1.4.

When the relational expression is satisfied, the sensitivity of the optical lens can be effectively reduced, the processing and assembling difficulty of each lens of the optical lens is reduced, and the processing cost is saved. When (ce1+ ce2+ ce3+ ce4+ ce5+ ce6)/6 is larger than or equal to 1.4, the average value of the ratio of the center thickness to the edge thickness of each lens is too large, and the difference between the middle thickness and the edge thickness of each lens is too large, which easily causes the increase of molding difficulty and the assembly difficulty at the later stage.

In some embodiments, the optical lens 100 further satisfies the following relationship: -4.5< f234/f < -1;

wherein f234 is a combined focal length of the second lens, the third lens and the fourth lens, and f is a focal length of the optical lens. Alternatively, the ratio of f234/f can be-1.36, -1.56, -1.6, -1.66, -2.31, -3.38, -3.87, -3.91, etc.

When the relation formula is satisfied, the aberration generated by the first lens, the fifth lens and the sixth lens behind the first lens can be corrected and balanced, the tolerance sensitivity of each lens can be balanced, and the total length of the optical lens can be shortened. If f234/f is less than or equal to-4.5, the front lens group (i.e. the second lens element, the third lens element and the fourth lens element) is liable to bear too large negative refractive power, which is unfavorable for balancing the aberration of the optical lens.

In some embodiments, the optical lens 100 further satisfies the following relationship: -2< R12/f6< -0.5;

wherein R12 is a radius of curvature of an object-side surface of the sixth lens at an optical axis, and f6 is a focal length of the sixth lens. Optionally, the value of R12/f6 can be-0.8, -1.02, -1.18, -1.19, -1.36, -1.46, -1.61, etc.

When the relation is satisfied, the angle of the main ray of the internal field of view of the chip can be well matched, and the field curvature astigmatism of the optical lens can be effectively reduced. When R12/f is less than or equal to-2, the negative refractive power distributed by the sixth lens element is too small to correct the aberration generated by the front lens element (i.e. the lens element before the sixth lens element), resulting in a reduction in the image quality of the optical lens.

In some embodiments, the optical lens 100 further satisfies the following relationship: 0.5< (f5+ | f6|)/f < 3;

wherein f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f is the focal length of the optical lens. Illustratively, (f5+ | f6|)/f may take on values of 0.94, 1.03, 1.31, 1.76, 1.97, 2.62, etc.

When the relation is satisfied, the total length of the optical lens can be shortened, the sensitivity of the optical lens can be reduced, the aberration of the optical lens can be well balanced, and the resolving power of the optical lens can be improved. If (f5+ | f6|)/f is greater than or equal to 3, the positive refractive power borne by the fifth lens element and the negative refractive power borne by the sixth lens element are too large, which is not favorable for aberration correction and improvement of imaging quality.

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

First embodiment

As shown in fig. 1, the optical lens 100 disclosed in the first embodiment of the present application includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are sequentially disposed along an optical axis O from an object side to an image side.

The first lens element L1 with positive refractive power has a first object-side surface L10 and a first image-side surface L12, and the second lens element L2 with positive refractive power has a second object-side surface L20 and a second image-side surface L22. The third lens element L3 with negative refractive power has a third object-side surface L30 and a third image-side surface L32. The fourth lens element L4 with positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with positive refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with negative refractive power includes a sixth object-side surface L60 and a sixth image-side surface L62.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the optical axis O, the second object-side surface L20 is convex at the optical axis O, and the second image-side surface L22 is concave at the optical axis O. The third object-side surface L30 is convex at the optical axis O, the third image-side surface L32 is concave at the optical axis O, the fourth object-side surface L40 is convex at the optical axis O, and the fourth image-side surface L42 is convex at the optical axis O. The fifth object-side surface L50 is concave at the optical axis O, the fifth image-side surface L52 is convex at the optical axis O, the sixth object-side surface L60 is convex at the optical axis O, and the sixth image-side surface L62 is concave at the optical axis O.

Further, the first object-side surface L10 and the first image-side surface L12 are concave and convex at the circumference, respectively. The second object-side surface L20 and the second image-side surface L22 are convex and concave at the circumference, the third object-side surface L30 and the third image-side surface L32 are convex at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are convex and concave at the circumference, the fifth object-side surface L50 is concave at the circumference, and the fifth image-side surface L52 is convex at the circumference. The sixth object side L60 and the sixth image side L62 are concave and convex, respectively, at the circumference.

Further, the object-side surface and the image-side surface of the six lenses are aspheric. The parametric formula for the aspheric surface is:

wherein, X is the distance from any point on the aspheric surface to the plane tangent to the aspheric surface vertex, Y is the vertical distance between any point on the aspheric surface curve and the optical axis, R is the curvature radius of the aspheric surface vertex, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface type formula.

And the materials of the six lenses are plastics, so that the overall weight of the optical lens 100 is reduced, and the light and thin design is facilitated.

In the first embodiment, the optical lens 100 also satisfies ImgH/ObjH of 0.322. Wherein. In the above relation, ImgH may take a value of 2.4mm, and ObjH may take a value of 7.46 mm.

In the first embodiment, Tobj/TTL is 2.06. In the above relation, the value of Tobj may be 8.9mm, and the value of TTL may be 4.33 mm.

In the first embodiment, R13/SAG62 is 2.47. In the above relation, the value of R13 can be 0.52mm, and the value of SAG62 can be 0.21 mm.

In the first embodiment, f56/(SAG62+ | SAG52|) -2.47. In the above relation, f56 may be 3.97, SAG62 may be 0.21mm, and SAG52 may be-0.3 mm.

In the first embodiment, (ce1+ ce2+ ce3+ ce4+ ce5+ ce6)/6 is 1.17. In the relational expression, the values of ce1, ce2, ce3, ce4, ce5 and ce6 are 1.55mm, 0.87mm, 0.65mm, 1.39mm, 1.99mm and 0.60mm respectively.

In the first embodiment, f234/f is-2.31. Wherein f234 is-5.04 mm, and f can be 2.18 mm.

In the first embodiment, R12/f6 is-1.36. R12 may take on the value of 1.96mm and f6 may take on the value of-1.44 mm.

In the first embodiment, (f5+ | f6|)/f ═ 1.31. Wherein, the value of f5 can be 1.41mm, and the value of f6 can be-1.44 mm.

In the first embodiment, FNO is 2.6.

In the first embodiment, the field angle FOV of the optical lens 100 is 79 °. When the above relationship is satisfied, the optical lens 100 can acquire a wide-range image, and the imaging range of the optical lens 100 is enlarged.

Specifically, taking as an example that the focal length f of the optical lens 100 is 2.18mm, the field angle FOV of the optical lens 100 is 79 °, the aperture size FNO is 2.6, and the total length TTL of the optical lens is 4.33mm, the other parameters of the optical lens 100 are given in table 1 and table 2 below, respectively. The elements of the optical lens 100 from the object side to the image side along the optical axis O are arranged in the order of the elements from top to bottom in table 1. In the same lens, the surface with the smaller surface number is the object side surface of the lens, and the surface with the larger surface number is the image side surface of the lens, and for example, the surface numbers 2 and 3 correspond to the first object side surface L10 and the first image side surface L12 of the first lens L1, respectively. The radii in table 1 are the curvature radii of the object-side or image-side surfaces of the respective surface numbers at the optical axis O. The first value in the "thickness" parameter list of the first lens element L1 is the thickness (center thickness) of the lens element along the optical axis O, and the second value is the distance from the image-side surface of the lens element to the object-side surface of the subsequent lens element along the optical axis O. The numerical value of the stop 102 in the "thickness" parameter column is the distance on the optical axis O from the stop 102 to the vertex of the object-side surface of the subsequent lens (the vertex refers to the intersection point of the lens and the optical axis O), the direction from the object-side surface of the first lens L1 to the image-side surface of the last lens is defined as the positive direction of the optical axis O, when the value is negative, it indicates that the stop 102 is disposed on the right side of the vertex of the object-side surface of the subsequent lens, and if the thickness of the stop 102 is positive, the stop 102 is disposed on the left side of the vertex of the object-side. Table 2 is a table of the relevant parameters of the aspheric surface of each lens in table 1, where k is the cone coefficient and Ai is the i-th order aspheric coefficient.

The refractive index and Abbe number of each lens are both numerical values at a reference wavelength (e.g., 587.56nm), and the focal length is a numerical value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm.

TABLE 1

TABLE 2

Referring to fig. 2(a), fig. 2(a) shows a longitudinal spherical aberration curve of the optical lens 100 in the first embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, and 650.0000 nm. In fig. 2(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 2(a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 2(B), fig. 2(B) is a diagram of astigmatism of light of the optical lens 100 in the first embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 2(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 2(C), fig. 2(C) is a graph illustrating a distortion curve of the optical lens 100 at a wavelength of 555.0000nm in the first embodiment. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 2(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Second embodiment

Referring to fig. 3, fig. 3 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 stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

The first lens element L1 with positive refractive power has a first object-side surface L10 and a first image-side surface L12, and the second lens element L2 with positive refractive power has a second object-side surface L20 and a second image-side surface L22. The third lens element L3 with negative refractive power has a third object-side surface L30 and a third image-side surface L32. The fourth lens element L4 with negative refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with positive refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with negative refractive power includes a sixth object-side surface L60 and a sixth image-side surface L62.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second object-side surface L20 is convex at the paraxial region O, and the second image-side surface L22 is concave at the paraxial region O. The third object-side surface L30 is convex at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is concave at the paraxial region O, and the fourth image-side surface L42 is concave at the paraxial region O. The fifth object-side surface L50 is convex at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

Further, the first object-side surface L10 and the first image-side surface L12 are concave and convex at the circumference, respectively. The second object-side surface L20 and the second image-side surface L22 are respectively convex and concave at the circumference, the third object-side surface L30 and the third image-side surface L32 are respectively concave and convex at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are respectively convex and concave at the circumference, the fifth object-side surface L50 is concave at the circumference, and the fifth image-side surface L52 is convex at the circumference. The sixth object side L60 and the sixth image side L62 are concave and convex, respectively, at the circumference.

Further, the object-side surface and the image-side surface of the six lenses are aspheric. And the materials of the six lenses are plastics, so that the overall weight of the optical lens 100 is reduced, and the light and thin design is facilitated.

In addition, the values and ratios of the relations of the optical lens 100 in the second embodiment can be shown in table 3 as follows:

in the second embodiment, the focal length f of the optical lens 100 is 2.49mm, the field angle FOV of the optical lens 100 is 78.7 °, the aperture size FNO is 2.4, and the total length TTL of the optical lens is 4.204 mm.

Other parameters in the second embodiment are shown in the following table 4 and table 5, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 4 are mm.

TABLE 4

TABLE 5

Further, please refer to fig. 4(a), which shows a longitudinal spherical aberration curve of the optical lens 100 in the second embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, 650.0000 nm. In fig. 4(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 4(a), the spherical aberration value of the optical lens 100 in the second embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 4(B), fig. 4(B) is a diagram of astigmatism of light of the optical lens 100 in the second embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 4(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 4(C), fig. 4(C) is a graph illustrating a distortion curve of the optical lens 100 at a wavelength of 555.0000nm in the second embodiment. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 4(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Third embodiment

Referring to fig. 5, fig. 5 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 stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

The first lens element L1 with positive refractive power has a first object-side surface L10 and a first image-side surface L12, and the second lens element L2 with negative refractive power has a second object-side surface L20 and a second image-side surface L22. The third lens element L3 with negative refractive power has a third object-side surface L30 and a third image-side surface L32. The fourth lens element L4 with positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with positive refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with negative refractive power includes a sixth object-side surface L60 and a sixth image-side surface L62.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second image-side surface L22 is concave at the paraxial region O, and the second object-side surface L20 is concave at the paraxial region O. The third object-side surface L30 is convex at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is concave at the paraxial region O, and the fourth image-side surface L42 is concave at the paraxial region O. The fifth object-side surface L50 is convex at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

Further, the first object-side surface L10 and the first image-side surface L12 are concave and convex at the circumference, respectively. The second object-side surface L20 and the second image-side surface L22 are both concave at the circumference, the third object-side surface L30 and the third image-side surface L32 are both convex at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are respectively convex and concave at the circumference, the fifth object-side surface L50 is concave at the circumference, and the fifth image-side surface L52 is convex at the circumference. The sixth object side L60 and the sixth image side L62 are concave and convex, respectively, at the circumference.

In the third embodiment, the focal length f of the optical lens 100 is 2.73mm, the field angle FOV of the optical lens 100 is 78.8 °, the aperture size FNO is 2.2, and the total length TTL of the optical lens is 4.222mm, for example.

Other parameters in the third embodiment are shown in the following table 7 and table 8, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm.

TABLE 7

TABLE 8

Further, please refer to fig. 6(a), which shows a longitudinal spherical aberration curve of the optical lens 100 in the third embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, 650.0000 nm. In fig. 6(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 6(a), the spherical aberration value of the optical lens 100 in the third embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 6(B), fig. 6(B) is a diagram of astigmatism of light of the optical lens 100 in the third embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 6(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 6(C), fig. 6(C) is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 555.0000 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 6(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Fourth embodiment

Fig. 7 is a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present disclosure. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second image-side surface L22 is convex at the paraxial region O, and the second object-side surface L20 is convex at the paraxial region O. The third object-side surface L30 is concave at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is convex at the paraxial region O, and the fourth image-side surface L42 is concave at the paraxial region O. The fifth object-side surface L50 is concave at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

In the fourth embodiment, the focal length f of the optical lens 100 is 2.71mm, the field angle FOV of the optical lens 100 is 77.2 °, the aperture size FNO is 2.05, and the total length TTL of the optical lens is 4.451mm, for example.

Other parameters in the fourth embodiment are shown in the following table 10 and table 11, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 10 are mm.

Watch 10

TABLE 11

Further, referring to fig. 8(a), a longitudinal spherical aberration curve of the optical lens 100 in the fourth embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, and 650.0000nm is shown. In fig. 8(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 8(a), the spherical aberration value of the optical lens 100 in the fourth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 8(B), fig. 8(B) is a diagram of astigmatism of light of the optical lens 100 in the fourth embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 8(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 8(C), fig. 8(C) is a distortion curve diagram of the optical lens 100 in the fourth embodiment at a wavelength of 555.0000 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 8(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Fifth embodiment

Fig. 9 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second image-side surface L22 is convex at the paraxial region O, and the second object-side surface L20 is convex at the paraxial region O. The third object-side surface L30 is concave at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is convex at the paraxial region O, and the fourth image-side surface L42 is convex at the paraxial region O. The fifth object-side surface L50 is concave at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

Further, the first object-side surface L10 and the first image-side surface L12 are concave and convex at the circumference, respectively. The second object-side surface L20 and the second image-side surface L22 are both concave at the circumference, the third object-side surface L30 and the third image-side surface L32 are both convex at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are respectively convex and concave at the circumference, the fifth object-side surface L50 is concave at the circumference, and the fifth image-side surface L52 is concave at the circumference. The sixth object side L60 and the sixth image side L62 are concave and convex, respectively, at the circumference.

In the fifth embodiment, the focal length f of the optical lens 100 is 1.87mm, the field angle FOV of the optical lens 100 is 79 °, the aperture size FNO is 2.6, and the total length TTL of the optical lens is 3.734mm, for example.

The other parameters in the fifth embodiment are shown in the following table 13 and table 14, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 13 are mm.

Watch 13

TABLE 14

Further, referring to fig. 10(a), a longitudinal spherical aberration curve of the optical lens 100 in the fifth embodiment at wavelengths of 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, and 650.0000nm is shown. In fig. 10(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 10(a), the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 10(B), fig. 10(B) is a diagram of astigmatism of light of the optical lens 100 in the fifth embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 10(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 10(C), fig. 10(C) is a graph illustrating a distortion curve of the optical lens 100 at a wavelength of 555.0000nm in the fifth embodiment. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 10(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Sixth embodiment

Fig. 11 is a schematic structural diagram of an optical lens 100 according to a sixth embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second image-side surface L22 is convex at the paraxial region O, and the second object-side surface L20 is concave at the paraxial region O. The third object-side surface L30 is concave at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is convex at the paraxial region O, and the fourth image-side surface L42 is convex at the paraxial region O. The fifth object-side surface L50 is concave at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

In the sixth embodiment, the focal length f of the optical lens 100 is 1.83mm, the field angle FOV of the optical lens 100 is 75.8 °, the aperture size FNO is 2.60, and the total length TTL of the optical lens is 5.367mm, for example.

The other parameters in the sixth embodiment are shown in the following table 16 and table 17, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 16 are mm.

TABLE 16

TABLE 17

Further, referring to fig. 12(a), a longitudinal spherical aberration curve of the optical lens 100 in the sixth embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, and 650.0000nm is shown. In fig. 12(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 12(a), the spherical aberration value of the optical lens 100 in the sixth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 12(B), fig. 12(B) is a diagram of astigmatism of light of the optical lens 100 in the sixth embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 12(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 12(C), fig. 12(C) is a graph illustrating a distortion curve of the optical lens 100 at a wavelength of 555.0000nm in the sixth embodiment. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 12(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Seventh embodiment

Fig. 13 is a schematic structural diagram of an optical lens 100 according to a seventh embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an infrared filter 70, which are provided in this order from the object side to the image side along an optical axis O.

Further, the first object-side surface L10 and the first image-side surface L12 are convex at the paraxial region O, the second image-side surface L22 is concave at the paraxial region O, and the second object-side surface L20 is convex at the paraxial region O. The third object-side surface L30 is concave at the paraxial region O, the third image-side surface L32 is concave at the paraxial region O, the fourth object-side surface L40 is convex at the paraxial region O, and the fourth image-side surface L42 is convex at the paraxial region O. The fifth object-side surface L50 is concave at the paraxial region O, the fifth image-side surface L52 is convex at the paraxial region O, the sixth object-side surface L60 is convex at the paraxial region O, and the sixth image-side surface L62 is concave at the paraxial region O.

Further, the first object-side surface L10 and the first image-side surface L12 are concave and convex at the circumference, respectively. The second object-side surface L20 and the second image-side surface L22 are both concave at the circumference, the third object-side surface L30 and the third image-side surface L32 are concave and convex at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are convex and concave at the circumference, the fifth object-side surface L50 is concave at the circumference, and the fifth image-side surface L52 is convex at the circumference. The sixth object side L60 and the sixth image side L62 are concave and convex, respectively, at the circumference.

In the seventh embodiment, the focal length f of the optical lens 100 is 1.69mm, the field angle FOV of the optical lens 100 is 80.1 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 5.783mm, for example.

The other parameters in the seventh embodiment are shown in the following table 19 and table 20, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. The refractive index and Abbe number of each lens are values at a reference wavelength (e.g., 587.56nm), and the focal length is a value at a reference wavelength of 555.00 nm.

It is understood that the units of the radius Y, thickness, and focal length in table 19 are mm.

Watch 19

Watch 20

Further, referring to fig. 14(a), a longitudinal spherical aberration curve of the optical lens 100 in the seventh embodiment at 470.0000nm, 510.0000nm, 555.0000nm, 610.0000nm, and 650.0000nm is shown. In fig. 14(a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 14(a), the spherical aberration value of the optical lens 100 in the seventh embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 14(B), fig. 14(B) is a diagram of astigmatism of light of the optical lens 100 in the seventh embodiment at a wavelength of 555.0000 nm. Wherein the abscissa in the X-axis direction represents the focus shift and the ordinate in the Y-axis direction represents the image height. As can be seen from fig. 14(B), astigmatism of the optical lens 100 is well compensated.

Referring to fig. 14(C), fig. 14(C) is a distortion curve diagram of the optical lens 100 in the seventh embodiment at a wavelength of 555.0000 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height. As can be seen from fig. 14(C), the distortion of the optical lens 100 is well corrected at a wavelength of 555.0000 nm.

Please refer to table 21 below, which is a summary table of the ratios of the optical lens 100 of the present embodiment in the first to seventh embodiments, respectively.

TABLE 21

Referring to fig. 15, the present application further discloses a camera module 200, which includes an image sensor 201 and the optical lens 100 according to any of the first to seventh embodiments, wherein the image sensor 201 is disposed on an image side of the optical lens 100. The optical lens 100 is configured to receive an optical signal of a subject and project the optical signal to the image sensor 201, and the image sensor 201 is configured to convert the optical signal corresponding to the subject into an image signal. And will not be described in detail herein. It can be understood that the camera module 200 having the optical lens 100 has all the technical effects of the optical lens 100, i.e. the total length of the optical lens 100 can be effectively shortened, the magnification can be improved, and the camera module is suitable for long-range shooting, and can also improve the imaging quality. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

Referring to fig. 16, the present application further discloses an electronic device 300, wherein the electronic device 300 includes a housing 301 and the camera module 200, and the camera module 200 is disposed on the housing 301. The electronic device 300 may be, but is 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 camera module 200 also has all the technical effects of the optical lens 100. That is, the total length of the optical lens 100 can be effectively shortened, the magnification can be improved, and the optical lens is suitable for long-range shooting and can improve the imaging quality. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are introduced in detail, and the principle and the implementation of the present invention are explained by using specific examples, and the explanation of the above embodiments is only used to help understanding the optical lens, the camera module and the electronic device and the core idea thereof; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.

Claims

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 which are arranged in sequence from an object side to an image side along an optical axis;

the second lens element with refractive power;

the fourth lens element with refractive power;

the optical lens satisfies the following relationship:

0.05＜ImgH/ObjH＜1；

2. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

0.5<Tobj/TTL<15；

3. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

FNO≤2.6；

wherein the FNO is the f-number of the optical lens.

4. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

1<R13/SAG62<2.5；

wherein R13 is a curvature radius of the image-side surface of the sixth lens element on the optical axis, and SAG62 is a distance between the edge of the optically effective area of the image-side surface of the sixth lens element projected on the optical axis and an intersection of the image-side surface of the sixth lens element and the optical axis.

5. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

3<f56/(SAG62+|SAG52|)<8；

wherein f56 is a combined focal length of the fifth lens and the sixth lens, SAG52 is a distance between an edge of the image-side surface optically effective area of the fifth lens projected on the optical axis to an intersection of the image-side surface of the fifth lens and the optical axis, and SAG62 is a distance between an edge of the image-side surface optically effective area of the sixth lens projected on the optical axis to an intersection of the image-side surface of the sixth lens and the optical axis.

6. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

(ce1+ce2+ce3+ce4+ce5+ce6)/6<1.4；

7. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

-4.5<f234/f<-1；

8. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

-2<R12/f6<-0.5；

9. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:

0.5<(f5+|f6|)/f<3；

wherein f5 is the focal length of the fifth lens, f6 is the focal length of the sixth lens, and f is the focal length of the optical lens.

10. The utility model provides a module of making a video recording which characterized in that: the camera module comprises an image sensor and the optical lens of any one of claims 1 to 9, wherein the image sensor is arranged on the image side of the optical lens.

11. An electronic device, characterized in that: the electronic device comprises a housing and the camera module of claim 10, the camera module being disposed on the housing.