CN112099189A - Optical lens, camera module and electronic equipment - Google Patents

Optical lens, camera module and electronic equipment Download PDF

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Publication number
CN112099189A
CN112099189A CN202010949753.2A CN202010949753A CN112099189A CN 112099189 A CN112099189 A CN 112099189A CN 202010949753 A CN202010949753 A CN 202010949753A CN 112099189 A CN112099189 A CN 112099189A
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China
Prior art keywords
lens
optical lens
image
optical
lens element
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CN202010949753.2A
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CN112099189B (en
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张文燕
杨健
李明
邹海荣
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OFilm Group Co Ltd
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OFilm Tech Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Abstract

An optical lens, a camera module and an electronic device, the optical lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element sequentially disposed along an optical axis from an object side to an image side, the first lens element having positive refractive power, the object side and the image side of the first lens element being respectively convex and concave at the optical axis, the second lens element having refractive power, the object side and the image side of the second lens element being respectively convex and concave at a paraxial region, the third lens element having refractive power, the fourth lens element having positive refractive power, the object side and the image side of the fourth lens element being respectively concave and convex at a paraxial region, the fifth lens element having negative refractive power, the sixth lens element having refractive power, the object side and the image side being respectively convex and concave at a paraxial region, the optical lens element satisfying the following relationships: FNO/TTL is less than 0.6 mm. By adopting the embodiment, the miniaturization design of the optical lens can be realized, and meanwhile, the light transmission caliber of the optical lens can be increased, so that the optical lens can have larger luminous flux and the imaging definition is improved.

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 electronic equipment.
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 light-weight reduction of smart phones, the cameras also need to meet the micro-design, but the micro-designed cameras have small light-transmitting apertures, and insufficient light flux causes influence on the shooting quality.
Disclosure of Invention
The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can improve the light-passing aperture and luminous flux of the optical lens while realizing the miniaturization design of the optical lens so as to improve the shooting quality.
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; wherein the content of the first and second substances,
the first lens element with positive refractive power has a convex object-side surface and a concave image-side surface at paraxial region thereof;
the second lens element with refractive power has a convex object-side surface and a concave image-side surface at paraxial region thereof;
the third lens element with refractive power;
the fourth lens element with positive refractive power has a concave object-side surface and a convex image-side surface at paraxial region, respectively;
the fifth lens element with negative refractive power;
the sixth lens element with 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:
FNO/TTL<0.6mm；
wherein FNO is the f-number of the optical lens; TTL is a distance on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical lens.
In the optical lens provided by the embodiment, the six-piece type lens is adopted, the number of the lens pieces is moderate, and the miniaturization design is favorably realized. In addition, the optical lens is provided with the refraction force, the convex-concave design of the object side surface and the image side surface and meets the relationship that FNO/TTL is less than 0.6, so that the miniaturization design of the optical lens can be ensured, the light passing aperture of the optical lens can be increased, and the increase of the luminous flux can be realized to improve the shooting effect.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.0< TTL/f < 1.6;
wherein, 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, and f is a focal length of the optical lens.
Through the focus of reasonable control optical lens and optical lens's total length, can not only realize optical lens's miniaturized design, can guarantee simultaneously that light assembles better on optical lens's imaging surface.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.05< air 2/TTL < 0.1;
wherein airL2 is an air gap between the optical axis and the image-side surface of the second lens element and the object-side surface of the third lens element, and TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane of the optical lens assembly.
The proportion of the air gap between the optical axis from the image side surface of the second lens to the object side surface of the third lens to the total length of the optical lens is reasonably controlled, so that the assembly sensitivity of the lens can be effectively reduced, and the assembly yield is improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.2< ETL4/CTL4< 0.4;
where ETL is the edge thickness of the effective aperture of the fourth lens and CTL4 is the center thickness of the fourth lens at the optical axis.
When the relational expression is satisfied, the lens of the fourth lens is in an ultrathin design at the edge, so that the optical path difference of the optical lens can be effectively balanced, the function of correcting field curvature is realized, the forming yield of the fourth lens can be ensured, and the imaging stability of the optical lens is improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -1< SIN (angless 8)/CTL4< 1;
the effective diameter edge of the image side surface of the fourth lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute included angle, the acute included angle is Angles8, and CTL4 is the central thickness of the fourth lens at the optical axis.
When the above relational expression is satisfied, secondary reflection between the lenses can be prevented, so that ghost images can be eliminated, and the imaging quality can be improved.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: FBL/TTL > 0.15;
the BFL is a distance from a vertex of an image-side surface of the sixth lens element to an imaging surface of the optical lens, which is parallel to the optical axis, and the TTL is a distance from an object-side surface of the first lens element to the imaging surface of the optical lens, which is parallel to the optical axis.
When the relation is satisfied, the optical lens can be miniaturized, meanwhile, the optical lens can be guaranteed to have a sufficient focusing range, the assembly yield between lenses of the optical lens is improved, meanwhile, the focal depth of the optical lens is guaranteed to be large, and more depth information of an object space can be acquired.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.05< SIN (AngleS1)/f1< 0.15;
the effective diameter edge of the object side surface of the first lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute included angle, the acute included angle is Angles1, and f1 is the focal length of the first lens.
The first lens provides all optical information of the lens group from an object space to an image space, and determines the imaging field range of the optical lens, so that the optical lens can be ensured to have a proper field angle to acquire imaging information in a certain range when the relation is satisfied, and the imaging quality and the imaging effect are improved.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes a stop disposed between the object side of the optical lens and the image side of the optical lens, and the optical lens satisfies the following relation: 0.2< DL/(2 × Imgh) < 0.4;
wherein DL is the diameter of the effective aperture of the diaphragm of the optical lens, and Imgh is half of the image height corresponding to the maximum field angle of the optical lens.
The diameter of the diaphragm aperture of the optical lens determines the light transmission quantity of the whole optical lens, and the half of the image height corresponding to the maximum field angle of the optical lens determines the image definition and the pixel size of the whole optical lens, so that the optical lens can be reasonably matched to ensure that the optical lens has enough light transmission quantity and ensure the definition of a shot image.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -0.7< f4/f5< 0;
wherein f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens. The fourth lens provides positive refractive power, so that light can be converged, and collection of object space light is facilitated, the fifth lens provides negative refractive power, so that position chromatic aberration caused by the optical lens can be corrected, and the positive and negative combination of the two lenses can effectively correct the position chromatic aberration and improve imaging definition.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens further satisfies the following relation: -1mm < (R7R 8)/(R7+ R8) < -0.6 mm;
wherein R7 is a radius of curvature of an object-side surface of the fourth lens element at an optical axis, and R8 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.
When the relation is satisfied, the curvature radius of the object side surface of the fourth lens element at the optical axis and the curvature radius of the image side surface of the fourth lens element at the optical axis are appropriate, so that the optical path difference between the marginal ray and the paraxial ray of the optical lens can be reasonably balanced, the field curvature and the astigmatism can be reasonably corrected, the sensitivity of the optical lens can be reduced, and the assembly stability can be improved.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes an infrared filter, and the infrared filter is disposed between the image side of the sixth lens element and an imaging surface of the optical lens.
In order to ensure the imaging definition of the shot object on the imaging surface, 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 a second aspect, the present invention discloses a camera module, which includes an image sensor and the optical lens of the 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 increase the light-transmitting caliber and improve the luminous flux while meeting the requirement of miniaturization design so as to improve the imaging definition.
In a third aspect, the present invention further discloses an electronic device, where the electronic device includes a housing and the camera module according to the second aspect, and the camera module is disposed on the housing. The electronic equipment with the camera module can effectively meet the requirement of miniaturization design, and can also effectively increase the clear aperture and improve the luminous flux so as to improve the definition of imaging.
Compared with the prior art, the invention has the beneficial effects that:
according to the optical lens, the camera module and the electronic equipment provided by the embodiment of the invention, the optical lens realizes the increase of the light transmission aperture of the optical lens by limiting the specific relation between the diaphragm number of the optical lens and the total length of the optical lens, so that the optical lens has larger luminous flux and the imaging definition is improved. In addition, the six-piece lens assembly mode is adopted, the number of the pieces is moderate, and the miniaturization and miniaturization design of electronic equipment can be met.
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 an axial chromatic 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 an on-axis 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 an on-axis 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 an on-axis 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 an on-axis 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 an on-axis 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 an on-axis aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 15 is a schematic structural diagram of an optical lens disclosed in an eighth embodiment of the present application;
fig. 16 is an on-axis aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);
fig. 17 is a schematic structural diagram of the camera module disclosed in the present application;
fig. 18 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 clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, 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", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an 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 meanings of these terms in the present invention can be understood by those skilled 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 meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
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 positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with negative refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with refractive power has 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 and concave, respectively, at the paraxial region O, and the second object-side surface L20 and the second image-side surface L22 are convex and concave, respectively, 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, and the fourth object-side surface L40 and the fourth image-side surface L44 are concave and convex, respectively, at the paraxial region O. The fifth object-side surface L50 is concave at the paraxial region O, and the fifth image-side surface L52 is concave or convex at the paraxial region O. The sixth object-side surface L60 and the sixth image-side surface L62 are convex and concave, respectively, at the optical axis.
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 be aspheric lenses, spherical lenses or free-form lenses.
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 imaging surface 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: FNO/TTL is less than 0.6 mm; wherein FNO is the f-number of the optical lens; TTL is a distance on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical lens. Alternatively, the ratio of FNO to TTL can be approximately 0.47mm, 0.49mm, 0.51mm, 0.52mm, 0.54mm, and the like.
Satisfying above-mentioned relational expression, can giving consideration to optical lens's big light ring and miniaturized design requirement simultaneously, for the shooting provides sufficient light flux, satisfy high-quality high definition shooting needs, consequently satisfy FNO/TTL and can satisfy the characteristics of big light ring and miniaturized structure simultaneously less than 0.6mm, if FNO/TTL >0.6mm, can cause optical lens 100's light flux not enough when giving consideration to the miniaturization, lead to the picture definition of shooing to descend.
Further, the optical lens 100 satisfies the following relationship: 1.0< TTL/f < 1.6; wherein, 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, and f is a focal length of the optical lens. Alternatively, the ratio of TTL to f can be 1.2, 1.3, 1.39, 1.44, 1.46, 1.50, 1.53, 1.59, and the like.
Through the reasonable control focus and optical lens's total length, can not only realize optical lens's miniaturization, can guarantee simultaneously that light is better assembles on optical lens's imaging surface. If TTL/f is less than or equal to 1.0, the sensitivity of the optical lens is increased due to the short total length of the optical lens, and the convergence of light on the imaging surface of the optical lens is not facilitated. When TTL/f is greater than or equal to 1.6, the total length of the optical lens is too long, which may cause too large angle of the chief ray of the light entering the imaging surface of the optical lens, resulting in incomplete imaging information and affecting the shooting effect.
In some embodiments, the optical lens 100 satisfies the following relationship: 0.05< air 2/TTL < 0.1; wherein airL2 is an air gap between the optical axis and the image-side surface of the second lens element and the object-side surface of the third lens element, and TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane of the optical lens assembly. Illustratively, the value of air 2/TTL can be 0.06, 0.07, 0.08, 0.09, etc.
The assembly sensitivity of the optical lens can be reduced and the assembly yield can be improved by reasonably controlling the proportion of the total length of the optical lens to the air gap between the optical axes of the image side surface of the second lens element L2 and the object side surface of the third lens element L3. If air l2/TTL >0.1, the total length of the optical lens is inevitably too long while satisfying the performance of the optical system, and the miniaturization design of the optical lens cannot be satisfied, whereas if air l2/TTL <0.05, the sensitivity of the optical lens is increased, and the production yield is reduced.
Further, the optical lens 100 satisfies the following relation: the optical lens satisfies the following relation: 0.2< ETL4/CTL4< 0.4; where ETL is the edge thickness of the effective aperture of the fourth lens and CTL4 is the center thickness of the fourth lens at the optical axis. Illustratively, ETL4/CTL4 may take values of 0.25, 0.28, 0.30, 0.33, 0.35, 0.36, 0.38, 0.39, etc.
When the above relation is satisfied, the fourth lens L4 is designed to be ultra-thin at the edge, so that the optical path difference of the optical lens can be effectively balanced, and the function of correcting the field curvature can be realized. When ETL4/CTL4<0.2, the center of the fourth lens L4 is too thick relative to the edges, resulting in excessive image plane field curvature. When ETL4/CTL4>0.4, the center of the fourth lens L4 is too thin to meet the production and processing requirements. In other words, too thin or too thick center of the fourth lens L4 may make it difficult for the central light and the edge light to converge near the imaging plane of the optical lens, resulting in too large field curvature and affecting the imaging quality. Therefore, the thickness of the center and the edge of the fourth lens L4 should satisfy a certain ratio to ensure the workability and the molding yield, and ensure the imaging stability.
In some embodiments, optical lens 100 satisfies the following relationship: -1< SIN (angless 8)/CTL4< 1; the effective diameter edge of the image side surface of the fourth lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute included angle, the acute included angle is Angles8, and CTL4 is the central thickness of the fourth lens at the optical axis. Alternatively, in the above relationship, SIN (Angles9)/CTL4 can be-0.78, -0.81, -0.82, -0.83, -0.85, -0.87, -0.89, -0.91, -0.93, -0.95, -0.97, -0.98, 0.5, 0.6, 0.8, 0.9, etc.
The ratio of the radian of the curved surface of the fourth lens to the central thickness can prevent the secondary reflection from projecting to an imaging surface to form a ghost image in a certain range when strong light is shot, so that the secondary reflection between the lenses can be prevented when the relational expression is satisfied, the ghost image can be eliminated, and the imaging quality is improved. If the relationship is exceeded, secondary reflection can be formed between the image side surface and the object side surface of the fourth lens when strong light is shot, so that a ghost image is formed on an imaging surface, and the imaging quality is influenced.
In some embodiments, the optical lens 100 satisfies the following relationship: FBL/TTL > 0.15; the BFL is a distance from a vertex of an image-side surface of the sixth lens element to an imaging surface of the optical lens, which is parallel to the optical axis, and the TTL is a distance from an object-side surface of the first lens element to the imaging surface of the optical lens, which is parallel to the optical axis. Alternatively, the FBL/TTL may be 0.152, 0.155, 0.16, 0.165, 0.17, 0.18, etc., as long as greater than 0.15 is satisfied.
When the relation is satisfied, the optical lens can be ensured to have a sufficient focusing range while the miniaturization is satisfied, the assembly yield of the lens of the optical lens is improved, the focal depth of the optical lens is ensured to be larger, and more depth information of an object space can be acquired. If FBL/TTL is less than 0.15, the tolerance of the lens assembly process of the optical lens is too small, which may result in too low yield and increased difficulty of the production process, and at the same time, the depth of focus of the optical lens may not be guaranteed, which may result in poor imaging quality.
Further, the optical lens 100 further satisfies the following relation: 0.05< SIN (AngleS1)/f1< 0.15; the effective diameter edge of the object side surface of the first lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute included angle, the acute included angle is Angles1, and f1 is the focal length of the first lens. Alternatively, the ratio f45/f123 may be 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, etc. As long as it satisfies more than 0.05 and less than 0.15.
Considering that the first lens L1 is mainly used to provide all the optical information from the object space to the image space of the lens group, and at the same time, determines the imaging field range, the above relation is satisfied to ensure that the optical lens has a proper field angle to acquire imaging information in a certain range. If SIN (angle 1)/f1>0.15, the curvature of curvature value is too large, which results in increased sensitivity of the optical lens and difficulty in processing, and the difficulty in correcting the aberration generated by the first lens is increased, making it difficult to meet the shooting requirement. When the SIN (Angles1)/f1 is less than 0.05, the imaging range is reduced, and the requirement of large-range imaging cannot be met.
Further, the optical lens 100 also satisfies the following relation: 0.2< DL/(2 × Imgh) < 0.4; wherein DL is the diameter of the effective aperture of the diaphragm of the optical lens, and Imgh is half of the image height corresponding to the maximum field angle of the optical lens. Optionally, the value of DL/Imgh may be 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.35, 0.36, 0.38, etc.
The diameter of the diaphragm aperture of the optical lens determines the light transmission quantity of the whole optical lens, and the half of the image height corresponding to the maximum field angle of the optical lens determines the image definition and the pixel size of the whole optical lens, so that the optical lens can be reasonably matched to ensure that the optical lens has enough light transmission quantity and ensure the definition of a shot image. If DL/Imgh is greater than 0.4, the exposure is too high, the brightness is too high, and the picture quality is affected, while if DL/Imgh is less than 0.2, the light transmission is insufficient, and if the relative brightness of the light is insufficient, the picture sensitivity is reduced, and the shooting effect is affected.
Further, the optical lens 100 further satisfies the following relationship: -0.7< f4/f5< 0; wherein f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens. Illustratively, the ratio of f4/f5 can take on the values-0.40, -0.41, -0.42, -0.43, -0.46, -0.52, -0.55, -0.60, -0.66, -0.69, etc.
The fourth lens provides positive refractive power, so that light can be converged, and collection of object space light is facilitated, the fifth lens provides negative refractive power, so that position chromatic aberration caused by the optical lens can be corrected, and the positive and negative combination of the two lenses can effectively correct the position chromatic aberration and improve imaging definition. When the refractive power is-0.7 < F4/F5<0, the provided refractive power values can be reasonably matched, and the purposes of correcting position chromatic aberration and improving imaging definition are achieved. If f4/f5>0, the objective of positive and negative lens combination achromatization is not met. If f4/f5< -0.7, the light convergence is not facilitated, and the imaging chromatic aberration is too large.
In some embodiments, the optical lens further satisfies the following relationship: -1mm < (R7R 8)/(R7+ R8) < -0.6 mm; wherein R7 is a radius of curvature of an object-side surface of the fourth lens element at an optical axis, and R8 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.
When the relation is satisfied, the curvature radius of the object side surface and the curvature radius of the image side surface of the fourth lens are proper, the optical path difference between the marginal ray and the paraxial ray of the optical lens can be reasonably balanced, the field curvature and the astigmatism can be reasonably corrected, meanwhile, the sensitivity of the optical lens is reduced, and the assembly stability is improved. If (R7R 8)/(R7+ R8) > -0.6mm, the field curvature of the optical lens is too large, and if (R7R 8)/(R7+ R8) < -1mm, the sensitivity of the optical lens is increased, and the production yield is reduced.
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 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 negative 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 respectively convex and concave 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 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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. Wherein, the aspheric surface parameter formula is as follows:
Figure BDA0002676530940000101
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.
The six lenses are made of plastic, 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 satisfies the following relation: FNO/TTL is 0.52 mm. In the above relation, the value of FNO may be 2, and the value of TTL may be 3.88 mm. With the ratio limitation, the optical lens 100 can have a larger luminous flux to improve the shooting effect.
Further, in the first embodiment, the optical lens 100 also satisfies TTL/f 1.44. Wherein. In the above relation, the TTL may be 3.88mm, and f may be 2.70 mm.
Further, in the first embodiment, air l2/TTL is 0.07. In the above relation, air l2 may take a value of 0.26mm and TTL may take a value of 3.88 mm.
Further, in the first embodiment, ETL4/CTL4 is 0.36. In the above relation, ETL4 may take a value of 0.23mm, and CTL4 may take a value of 0.64 mm.
In the first embodiment, SIN (angless 8)/CTL4 is-0.83. In the above relationship, SIN (Angles8) can take on a value of-0.53, while CTL4 can take on a value of 0.64 mm.
Further, in the first embodiment, FBL/TTL is 0.15. In the relation, the value of FBL is 0.60mm, and the value of TTL is 3.88 mm.
In the first embodiment, SIN (angless 1)/f1 is 0.09. Wherein, SIN (Angles1) takes 0.35mm, and f1 takes 3.83 mm.
Further, in the first embodiment, DL/(2 × Imgh) is 0.27. DL can take on a value of 1.36mm, while Imgh can take on a value of 2.52 mm.
Further, in the first embodiment, f4/f5 is-0.41. Wherein, the value of f4 can be 1.82mm, and the value of f5 can be-4.42 mm.
Still further, in the first embodiment, (R7 × R8)/(R7+ R8) — 0.783129 mm. Wherein, the value of R7 can be-6.58 mm, and the value of R8 can be-0.89 mm.
In the first embodiment, the field angle FOV of the optical lens 100 is 85 °. 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 2.70mm, the field angle FOV of the optical lens 100 is 85 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 3.88mm, 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 1 and 2 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, abbe number, and focal length of each lens are numerical values at a reference wavelength.
It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm.
TABLE 1
Figure BDA0002676530940000111
Figure BDA0002676530940000121
TABLE 2
Number of noodles 1 2 3 4 5 6
k 2.8910E-01 1.6160E+01 9.9000E+01 -9.9000E+01 -9.9000E+01 1.6560E+01
A4 -4.2910E-02 -1.1350E-01 -1.3880E-01 6.9200E-02 -2.9880E-02 -3.5540E-01
A6 2.1860E-01 -2.1560E-01 -5.4460E-01 -4.2440E-01 1.0680E+00 2.7000E+00
A8 -2.9320E+00 5.7970E-01 1.0560E+00 -8.2270E-01 -1.1060E+01 -1.3420E+01
A10 2.0560E+01 -5.0740E+00 4.4230E+00 1.3700E+01 5.3850E+01 3.9790E+01
A12 -9.5540E+01 2.9180E+01 -6.0090E+01 -6.1240E+01 -1.5390E+02 -7.5360E+01
A14 2.8810E+02 -1.1090E+02 2.5960E+02 1.5080E+02 2.7280E+02 9.2970E+01
A16 -5.4660E+02 2.5300E+02 -5.7060E+02 -2.1650E+02 -2.9570E+02 -7.2900E+01
A18 5.9100E+02 -3.1270E+02 6.4410E+02 1.6940E+02 1.7970E+02 3.3050E+01
A20 -2.7740E+02 1.6100E+02 -2.9520E+02 -5.5660E+01 -4.6760E+01 -6.5640E+00
Number of noodles 7 8 9 10 11 12
k 8.3040E+00 -6.8950E+00 -6.8740E+01 -1.0760E+01 -6.4780E+00 -3.4940E+00
A4 -4.7400E-01 -2.5660E-01 1.0090E+00 9.2060E-01 -1.4860E-01 -2.4210E-01
A6 2.9260E+00 6.3540E-01 -2.4800E+00 -1.7870E+00 -3.2630E-01 1.4740E-01
A8 -8.6840E+00 -2.1730E+00 3.7790E+00 1.9420E+00 7.1910E-01 -5.9570E-02
A10 1.3000E+01 4.3410E+00 -4.4000E+00 -1.4440E+00 -8.1480E-01 7.0600E-03
A12 -5.0890E+00 -4.9610E+00 3.7910E+00 7.5770E-01 5.9020E-01 7.9400E-03
A14 -1.2070E+01 3.2410E+00 -2.2460E+00 -2.8090E-01 -2.6760E-01 -4.7200E-03
A16 1.9020E+01 -9.4570E-01 8.3430E-01 7.0960E-02 7.2810E-02 1.1500E-03
A18 -1.0930E+01 -4.8830E-02 -1.7090E-01 -1.0970E-02 -1.0870E-02 -1.3000E-04
A20 2.3160E+00 6.2330E-02 1.4530E-02 7.7000E-04 6.9000E-04 1.0000E-05
Referring to fig. 2(a), fig. 2(a) shows a light spherical aberration curve of the optical lens 100 in the first embodiment at 470.0000nm, 510.0000nm, 587.5618nm, 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 587.5618 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 587.5618nm 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 587.5618 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 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 disposed 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 negative 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the second embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 84.99 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 3.88 mm.
Other parameters in the second embodiment are shown in the following table 3 and table 4, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein.
It is understood that the units of the radius Y, thickness, and focal length in table 3 are all mm.
TABLE 3
Figure BDA0002676530940000131
Figure BDA0002676530940000141
TABLE 4
Number of noodles 1 2 3 4 5 6
K 2.941E-01 1.934E+01 8.316E+01 -9.900E+01 -9.900E+01 1.471E+01
A4 -4.334E-02 -1.182E-01 -1.457E-01 7.353E-02 -1.314E-02 -3.444E-01
A6 2.152E-01 -9.412E-02 -7.129E-01 -6.339E-01 8.429E-01 2.592E+00
A8 -2.798E+00 -1.030E+00 3.376E+00 8.116E-01 -9.655E+00 -1.285E+01
A10 1.934E+01 8.213E+00 -1.245E+01 5.955E+00 4.787E+01 3.780E+01
A12 -8.983E+01 -3.572E+01 1.823E+01 -3.730E+01 -1.377E+02 -7.127E+01
A14 2.734E+02 8.169E+01 3.001E+01 1.027E+02 2.448E+02 8.798E+01
A16 -5.256E+02 -8.742E+01 -1.594E+02 -1.557E+02 -2.658E+02 -6.929E+01
A18 5.759E+02 1.643E+01 2.327E+02 1.254E+02 1.614E+02 3.158E+01
A20 -2.731E+02 2.734E+01 -1.195E+02 -4.176E+01 -4.186E+01 -6.302E+00
Number of noodles 7 8 9 10 11 12
K 1.006E+01 -6.987E+00 -8.247E+01 3.626E+00 -5.970E+00 -3.326E+00
A4 -4.736E-01 -2.626E-01 9.867E-01 9.087E-01 -1.537E-01 -2.617E-01
A6 2.890E+00 7.012E-01 -2.351E+00 -1.726E+00 -3.317E-01 1.678E-01
A8 -8.384E+00 -2.337E+00 3.490E+00 1.811E+00 7.167E-01 -8.034E-02
A10 1.199E+01 4.638E+00 -4.028E+00 -1.288E+00 -7.983E-01 2.075E-02
A12 -3.562E+00 -5.502E+00 3.482E+00 6.422E-01 5.709E-01 2.650E-03
A14 -1.292E+01 4.017E+00 -2.080E+00 -2.261E-01 -2.560E-01 -3.500E-03
A16 1.877E+01 -1.630E+00 7.812E-01 5.466E-02 6.885E-02 9.800E-04
A18 -1.045E+01 2.713E-01 -1.628E-01 -8.190E-03 -1.015E-02 -1.200E-04
A20 2.175E+00 1.920E-03 1.425E-02 5.700E-04 6.300E-04 1.000E-05
Further, please refer to fig. 4(a), which shows a light spherical aberration curve of the optical lens 100 in the second embodiment at 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 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 587.5618 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 587.5618nm 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 587.5618 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 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 disposed 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 positive 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 negative refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52.
Further, the first object-side surface L10 and the first image-side surface L12 are respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the third embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 85 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 3.94 mm.
The other parameters in the third embodiment are shown in the following table 5 and table 6, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein.
It is understood that the units of the radius Y, thickness, and focal length in table 5 are mm.
TABLE 5
Figure BDA0002676530940000151
Figure BDA0002676530940000161
TABLE 6
Number of noodles 1 2 3 4 5 6
K 3.259E-01 2.897E+01 8.675E+01 -9.653E+01 -8.083E+01 1.135E+01
A4 -3.278E-02 -1.338E-01 -2.116E-01 3.092E-02 -2.567E-02 -2.478E-01
A6 -1.485E-02 1.953E-01 -3.400E-01 -3.498E-01 9.610E-02 1.269E+00
A8 7.302E-02 -3.157E+00 2.126E+00 4.600E-01 -1.974E+00 -5.125E+00
A10 -2.637E+00 1.865E+01 -1.053E+01 2.404E+00 1.039E+01 1.276E+01
A12 1.673E+01 -6.695E+01 2.634E+01 -1.554E+01 -3.067E+01 -2.125E+01
A14 -5.404E+01 1.394E+02 -2.553E+01 4.161E+01 5.572E+01 2.385E+01
A16 9.266E+01 -1.530E+02 -2.058E+01 -6.057E+01 -6.218E+01 -1.735E+01
A18 -7.799E+01 6.180E+01 6.552E+01 4.650E+01 3.904E+01 7.357E+00
A20 2.311E+01 1.030E+01 -3.963E+01 -1.464E+01 -1.044E+01 -1.365E+00
Number of noodles 7 8 9 10 11 12
K 1.086E+01 -6.516E+00 -8.586E+01 9.900E+01 -4.980E+00 -2.951E+00
A4 -3.868E-01 -3.035E-01 9.621E-01 9.102E-01 -1.157E-01 -2.977E-01
A6 2.115E+00 1.033E+00 -2.140E+00 -1.714E+00 -4.788E-01 1.947E-01
A8 -5.629E+00 -3.586E+00 2.902E+00 1.759E+00 9.096E-01 -1.189E-01
A10 8.563E+00 7.737E+00 -3.035E+00 -1.212E+00 -9.123E-01 6.544E-02
A12 -7.065E+00 -1.052E+01 2.358E+00 5.768E-01 5.881E-01 -2.536E-02
A14 2.305E+00 9.103E+00 -1.253E+00 -1.881E-01 -2.409E-01 6.350E-03
A16 8.177E-01 -4.750E+00 4.130E-01 4.066E-02 5.993E-02 -1.000E-03
A18 -9.107E-01 1.335E+00 -7.377E-02 -5.310E-03 -8.230E-03 9.000E-05
A20 2.167E-01 -1.524E-01 5.340E-03 3.200E-04 4.800E-04 0.000E+00
Further, please refer to fig. 6(a), which shows a light spherical aberration curve of the optical lens 100 in the third embodiment at 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 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 587.5618 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 587.5618 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 587.5618 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 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 disposed 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 negative 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the fourth embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 84.99 °, the aperture size FNO is 2.1, and the total length TTL of the optical lens is 3.88 mm.
Other parameters in the fourth 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.
It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm.
TABLE 7
Figure BDA0002676530940000171
Figure BDA0002676530940000181
TABLE 8
Number of noodles 1 2 3 4 5 6
K 2.191E-01 1.186E+01 6.572E+01 -9.900E+01 -9.900E+01 1.570E+01
A4 -4.326E-02 -1.207E-01 -1.424E-01 7.832E-02 7.330E-03 -3.386E-01
A6 2.139E-01 -1.457E-01 -7.174E-01 -6.747E-01 5.553E-01 2.538E+00
A8 -3.103E+00 -4.398E-01 3.531E+00 1.180E+00 -7.528E+00 -1.269E+01
A10 2.261E+01 3.416E+00 -1.523E+01 4.294E+00 3.869E+01 3.769E+01
A12 -1.092E+02 -1.427E+01 3.459E+01 -3.286E+01 -1.117E+02 -7.150E+01
A14 3.445E+02 2.593E+01 -2.271E+01 9.472E+01 1.969E+02 8.852E+01
A16 -6.905E+02 -5.573E+00 -6.153E+01 -1.458E+02 -2.110E+02 -6.980E+01
A18 7.974E+02 -4.344E+01 1.356E+02 1.176E+02 1.264E+02 3.187E+01
A20 -4.035E+02 4.230E+01 -7.929E+01 -3.895E+01 -3.237E+01 -6.380E+00
Number of noodles 7 8 9 10 11 12
K 9.355E+00 -6.827E+00 -7.297E+01 -5.175E+00 -5.970E+00 -3.343E+00
A4 -4.840E-01 -2.688E-01 9.912E-01 9.155E-01 -1.537E-01 -2.587E-01
A6 3.025E+00 7.401E-01 -2.383E+00 -1.756E+00 -3.361E-01 1.667E-01
A8 -9.129E+00 -2.552E+00 3.554E+00 1.870E+00 7.332E-01 -7.898E-02
A10 1.431E+01 5.267E+00 -4.096E+00 -1.354E+00 -8.256E-01 2.062E-02
A12 -7.919E+00 -6.576E+00 3.529E+00 6.881E-01 5.963E-01 2.020E-03
A14 -7.815E+00 5.114E+00 -2.103E+00 -2.459E-01 -2.699E-01 -3.120E-03
A16 1.504E+01 -2.280E+00 7.888E-01 5.991E-02 7.328E-02 8.900E-04
A18 -8.875E+00 4.736E-01 -1.642E-01 -8.990E-03 -1.091E-02 -1.100E-04
A20 1.877E+00 -2.324E-02 1.435E-02 6.200E-04 6.900E-04 1.000E-05
Further, referring to fig. 8(a), a light spherical aberration curve chart of the optical lens 100 in the fourth embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 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 587.5618 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 587.5618 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 587.5618 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 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 disposed 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 negative 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the fifth embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 85 °, the aperture size FNO is 1.83, and the total length TTL of the optical lens is 3.88 mm.
The other parameters in the fifth embodiment are shown in the following table 9 and table 10, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein.
It is understood that the units of the radius Y, thickness, and focal length in table 9 are mm.
TABLE 9
Figure BDA0002676530940000201
Watch 10
Figure BDA0002676530940000202
Figure BDA0002676530940000211
Further, referring to fig. 10(a), a light spherical aberration curve chart of the optical lens 100 in the fifth embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 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 587.5618 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 587.5618nm 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 587.5618 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 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 disposed 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 positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with negative 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 both convex at the circumference. 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 convex and concave at the circumference, respectively, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the sixth embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 87.99 °, the aperture size FNO is 1.83, and the total length TTL of the optical lens is 3.75mm, for example.
The other parameters in the sixth embodiment are shown in the following table 11 and table 12, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein.
It is understood that the units of the radius Y, thickness, and focal length in table 11 are mm.
TABLE 11
Figure BDA0002676530940000221
TABLE 12
Figure BDA0002676530940000222
Figure BDA0002676530940000231
Further, referring to fig. 12(a), a light spherical aberration curve chart of the optical lens 100 in the sixth embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 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 587.5618 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 587.5618nm 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 587.5618 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 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 disposed 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 positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with negative 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on the paraxial region O. The third object-side surface L30 and the third image-side surface L32 are 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 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 both convex at the circumference. 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 respectively convex and concave at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are both convex 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 the seventh embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 88 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 3.74 mm.
The other parameters in the seventh 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.
It is understood that the units of the radius Y, thickness, and focal length in table 13 are mm.
Watch 13
Figure BDA0002676530940000241
TABLE 14
Number of noodles 1 2 3 4 5 6
K 4.011E-01 5.572E+00 5.875E+01 -9.313E+01 5.422E+01 5.501E+01
A4 2.011E-01 -2.556E-01 2.022E-01 7.563E-02 3.450E-01 -2.371E-01
A6 -5.753E+00 2.836E+00 -5.990E+00 2.596E-01 -5.835E+00 1.197E+00
A8 7.645E+01 -3.584E+01 5.904E+01 -9.824E+00 5.346E+01 -1.895E+00
A10 -6.047E+02 2.652E+02 -3.880E+02 5.127E+01 -3.372E+02 -1.344E+01
A12 2.947E+03 -1.255E+03 1.658E+03 -9.130E+01 1.344E+03 7.111E+01
A14 -8.958E+03 3.761E+03 -4.578E+03 -8.398E+01 -3.298E+03 -1.485E+02
A16 1.654E+04 -6.887E+03 7.841E+03 5.688E+02 4.833E+03 1.615E+02
A18 -1.697E+04 7.024E+03 -7.543E+03 -8.003E+02 -3.872E+03 -9.094E+01
A20 7418.03708 -3055.7722 3.106E+03 3.809E+02 1.304E+03 2.119E+01
Number of noodles 7 8 9 10 11 12
K 5.688E+00 -4.425E+00 -7.528E+01 8.452E+01 -3.842E+00 -2.640E+00
A4 -4.223E-01 -3.547E-01 8.701E-01 8.891E-01 -9.181E-02 -3.084E-01
A6 8.581E-02 1.456E+00 -1.634E+00 -1.590E+00 -2.596E-01 2.982E-01
A8 1.696E+01 -5.771E+00 1.713E+00 1.603E+00 4.183E-01 -2.564E-01
A10 -9.851E+01 1.479E+01 -1.289E+00 -1.106E+00 -3.580E-01 1.562E-01
A12 2.709E+02 -2.496E+01 6.782E-01 5.376E-01 1.945E-01 -6.306E-02
A14 -4.178E+02 2.702E+01 -2.084E-01 -1.808E-01 -6.602E-02 1.647E-02
A16 3.686E+02 -1.750E+01 1.640E-02 3.982E-02 1.347E-02 -2.660E-03
A18 -1.736E+02 6.071E+00 8.140E-03 -5.120E-03 -1.510E-03 2.400E-04
A20 33.8801 -8.590E-01 -1.660E-03 2.900E-04 7.000E-05 -1.000E-05
Further, referring to fig. 14(a), a light spherical aberration curve chart of the optical lens 100 in the seventh embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 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 587.5618 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 587.5618 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 587.5618 nm.
Eighth embodiment
Fig. 15 is a schematic structural diagram of an optical lens according to an eighth embodiment of the present invention. 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, a sixth lens L6, and an infrared filter 70, which are disposed 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 positive refractive power includes a fourth object-side surface L40 and a fourth image-side surface L42. The fifth lens element L5 with negative refractive power includes a fifth object-side surface L50 and a fifth image-side surface L52. The sixth lens element L6 with positive 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 respectively convex and concave on the optical axis O, the second image-side surface L22 is concave on the paraxial region O, and the second object-side surface L20 is convex on 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 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 concave 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 both convex at the circumference. The second object-side surface L20 and the second image-side surface L22 are concave and convex at the circumference, the third object-side surface L30 and the third image-side surface L32 are convex and concave at the circumference, the fourth object-side surface L40 and the fourth image-side surface L42 are convex 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 surface L60 and the sixth image-side surface L62 are both convex 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 the eighth embodiment, the focal length f of the optical lens 100 is 2.70mm, the field angle FOV of the optical lens 100 is 88 °, the aperture size FNO is 2.0, and the total length TTL of the optical lens is 3.75mm, for example.
The other parameters in the eighth embodiment are shown in the following table 15 and table 16, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein.
It is understood that the units of the radius Y, thickness, and focal length in table 15 are mm.
Watch 15
Figure BDA0002676530940000261
Figure BDA0002676530940000271
TABLE 16
Number of noodles 1 2 3 4 5 6
K 5.092E-01 9.241E+00 5.382E+01 -9.900E+01 -9.900E+01 5.721E+01
A4 1.998E-01 -2.511E-01 1.880E-01 4.408E-02 2.250E-01 -2.156E-01
A6 -5.492E+00 2.840E+00 -6.515E+00 6.570E-01 -3.951E+00 8.146E-01
A8 7.204E+01 -3.517E+01 6.595E+01 -1.466E+01 3.580E+01 1.453E+00
A10 -5.666E+02 2.557E+02 -4.341E+02 9.014E+01 -2.297E+02 -2.794E+01
A12 2.757E+03 -1.187E+03 1.846E+03 -2.804E+02 9.208E+02 1.054E+02
A14 -8.382E+03 3.488E+03 -5.068E+03 4.619E+02 -2.260E+03 -1.940E+02
A16 1.548E+04 -6.274E+03 8.646E+03 -3.450E+02 3.305E+03 1.936E+02
A18 -15896.855 6286.08907 -8.324E+03 1.742E+01 -2.641E+03 -1.003E+02
A20 6955.7983 -2684.03 3.450E+03 7.876E+01 8.861E+02 2.125E+01
Number of noodles 7 8 9 10 11 12
K 5.791E+00 -4.396E+00 -9.409E+01 4.337E+01 -4.228E+00 -2.564E+00
A4 -3.399E-01 -2.911E-01 8.038E-01 7.100E-01 -2.454E-02 -3.132E-01
A6 -1.263E+00 9.822E-01 -1.508E+00 -1.170E+00 -4.597E-01 2.767E-01
A8 2.648E+01 -4.145E+00 1.677E+00 1.014E+00 7.263E-01 -2.178E-01
A10 -1.375E+02 1.206E+01 -1.554E+00 -5.871E-01 -6.142E-01 1.281E-01
A12 3.693E+02 -2.376E+01 1.173E+00 2.427E-01 3.197E-01 -5.152E-02
A14 -5.704E+02 3.009E+01 -6.289E-01 -7.330E-02 -1.033E-01 1.352E-02
A16 5.091E+02 -2.272E+01 2.141E-01 1.558E-02 2.013E-02 -2.190E-03
A18 -243.85714 9.212E+00 -4.220E-02 -2.050E-03 -2.170E-03 2.000E-04
A20 48.48015 -1.539E+00 3.850E-03 1.200E-04 1.000E-04 -1.000E-05
Further, please refer to fig. 16(a), which shows a light spherical aberration curve chart of the optical lens 100 in the eighth embodiment at wavelengths of 470.0000nm, 510.0000nm, 587.5618nm, 610.0000nm, and 650.0000 nm. In fig. 16(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. 16(a), the spherical aberration value of the optical lens 100 in the eighth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.
Referring to fig. 16(B), fig. 16(B) is a diagram of astigmatism of light of the optical lens 100 in the eighth embodiment at a wavelength of 587.5618 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. 16(B), astigmatism of the optical lens 100 is well compensated.
Referring to fig. 16(C), fig. 16(C) is a distortion curve diagram of the optical lens 100 in the eighth embodiment at a wavelength of 587.5618 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. 16(C), the distortion of the optical lens 100 is well corrected at a wavelength of 587.5618 nm.
It can be understood that, in the first to eighth embodiments, values/ratios of the relations of the optical lens are summarized as shown in the following tables 17 and 18:
TABLE 17
Figure BDA0002676530940000281
Watch 18
Figure BDA0002676530940000282
Referring to fig. 17, 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 eighth 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. 18, 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 described in detail above, and the principle and the embodiments of the present invention are explained in detail herein by applying specific examples, and the description of the embodiments above is only used to help understanding the optical lens, the camera module and the electronic device and the core ideas thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (13)

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 first lens element with positive refractive power has a convex object-side surface and a concave image-side surface at paraxial region thereof;
the second lens element with refractive power has a convex object-side surface and a concave image-side surface at paraxial region thereof;
the third lens element with refractive power;
the fourth lens element with positive refractive power has a concave object-side surface and a convex image-side surface at paraxial region, respectively;
the fifth lens element with negative refractive power;
the sixth lens element with 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:
FNO/TTL<0.6mm；
wherein FNO is the f-number of the optical lens; TTL is a distance on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical lens.
2. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relationship:
1.0<TTL/f<1.6；
wherein, 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, and f is a focal length of the optical lens.
3. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
0.05<airL2/TTL<0.1；
wherein airL2 is an air gap between the optical axis and the image-side surface of the second lens element and the object-side surface of the third lens element, and TTL is a distance on the optical axis from the object-side surface of the first lens element to the image plane of the optical lens assembly.
4. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
0.2<ETL4/CTL4<0.4；
where ETL is the edge thickness of the effective aperture of the fourth lens and CTL4 is the center thickness of the fourth lens at the optical axis.
5. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
-1<SIN(AngleS8)/CTL4<1；
the effective diameter edge of the image side surface of the fourth lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute angle, the acute angle is Angles8, and CTL4 is the central thickness of the fourth lens on the optical axis.
6. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
FBL/TTL>0.15；
the BFL is a distance from a vertex of an image-side surface of the sixth lens element to an imaging surface of the optical lens, which is parallel to the optical axis, and the TTL is a distance from an object-side surface of the first lens element to the imaging surface of the optical lens, which is parallel to the optical axis.
7. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
0.05<SIN(AngleS1)/f1<0.15；
the effective diameter edge of the object side surface of the first lens is provided with a tangent plane, the tangent plane and a plane perpendicular to the optical axis intersect to form an acute included angle, the acute included angle is Angles1, and f1 is the focal length of the first lens.
8. An optical lens according to claim 1, characterized in that: the optical lens further comprises a diaphragm, the diaphragm is arranged between the object side surface of the optical lens and the image side surface of the optical lens, and the optical lens meets the following relational expression:
0.2<DL/(2*Imgh)<0.4；
wherein DL is the diameter of the effective aperture of the diaphragm of the optical lens, and Imgh is half of the image height corresponding to the maximum field angle of the optical lens.
9. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
-0.7<f4/f5<0；
wherein f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.
10. An optical lens according to claim 1, characterized in that: the optical lens satisfies the following relation:
-1mm<(R7*R8)/(R7+R8)<-0.6mm；
wherein R7 is a radius of curvature of an object-side surface of the fourth lens element at an optical axis, and R8 is a radius of curvature of an image-side surface of the fourth lens element at the optical axis.
11. An optical lens according to claim 1, characterized in that: the optical lens further comprises an infrared filter, and the infrared filter is arranged between the image side of the sixth lens and the imaging surface of the optical lens.
12. 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 11, wherein the image sensor is arranged on the image side of the optical lens.
13. An electronic device, characterized in that: the electronic device comprises a housing and the camera module of claim 12, the camera module being disposed on the housing.
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CN113391433A (en) * 2021-06-02 2021-09-14 江西晶超光学有限公司 Optical lens, camera module and electronic equipment

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