CN113805313B - Optical imaging lens - Google Patents

Abstract

The invention provides an optical imaging lens. The optical imaging lens sequentially comprises from an object side to an image side of the optical imaging lens: the first lens is provided with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface; a second lens having negative optical power; the third lens is provided with negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is provided with negative focal power, and the object side surface of the fourth lens is a concave surface; a fifth lens having positive optical power; a sixth lens having negative optical power, wherein an image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is satisfied between the on-axis distance TTL and the entrance pupil diameter EPD of the optical imaging lens: 1.4< TTL/EPD <1.9. The invention solves the problem of poor imaging quality of the optical imaging lens in the prior art.

Description

Optical imaging lens

Technical Field

The invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens.

Background

Along with the universality of mobile phone use, the convenience of mobile phone photographing is greatly highlighted, more people are enthusiastic for mobile phone photographing, meanwhile, the requirement of photographing mobile phones is more and more, the photographing quality of mobile phone cameras is more and more, and the photographing quality of the cameras is not ideal because the mobile phone photographing lovers can photograph shared pictures through the mobile phones every day.

That is, the optical imaging lens in the prior art has a problem of poor imaging quality.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens so as to solve the problem that the optical imaging lens in the prior art has poor imaging quality.

In order to achieve the above object, the present invention provides an optical imaging lens comprising, in order from an object side of the optical imaging lens to an image side of the optical imaging lens: the first lens is provided with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface; a second lens having negative optical power; the third lens is provided with negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is provided with negative focal power, and the object side surface of the fourth lens is a concave surface; a fifth lens having positive optical power; a sixth lens having negative optical power, wherein an image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is satisfied between the on-axis distance TTL and the entrance pupil diameter EPD of the optical imaging lens: 1.4< TTL/EPD <1.9.

Further, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD <1.95.

Further, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens and the effective focal length f3 of the third lens satisfy: 0.1< (f2+f4)/f3 <2.0.

Further, the effective focal length f5 of the fifth lens, the effective focal length f of the optical imaging lens, and the effective focal length f1 of the first lens satisfy: 1.0< f 5/(f+f1) <1.7.

Further, the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: 1.0< (R2-R1)/(R2+R1) <1.7.

Further, the radius of curvature R6 of the image side of the third lens and the radius of curvature R5 of the object side of the third lens satisfy the following conditions: 0.8< (R5+R6)/f <1.5.

Further, the effective half caliber DT11 of the object side surface of the first lens and the effective half caliber DT31 of the object side surface of the third lens satisfy the following conditions: 1.0< DT11/DT31<1.5.

Further, the effective half aperture DT61 of the object side surface of the sixth lens, the effective half aperture DT62 of the image side surface of the sixth lens, and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfy: 1.2< (DT61+DT62)/ImgH <1.7.

Further, the combined focal length f123 of the first lens, the second lens and the third lens, the center thickness CT1 of the first lens, the center thickness CT2 of the second lens and the center thickness CT3 of the third lens satisfy: 2.5< f 123/(c1+c2+c3) <3.5.

Further, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens element, and the air interval T56 between the fifth lens element and the sixth lens element on the optical axis of the optical imaging lens element satisfy: 4.2< TTL/T56<5.4.

Further, an on-axis distance SAG51 between an intersection point of the object side surface of the fifth lens and the optical axis of the optical imaging lens and an effective radius vertex of the object side surface of the fifth lens and an on-axis distance SAG52 between an intersection point of the image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens satisfy: 1.1< SAG52/SAG51<1.6.

Further, the edge thickness ET2 of the second lens, the edge thickness ET4 of the fourth lens, the center thickness CT2 of the second lens, and the center thickness CT4 of the fourth lens satisfy: 1.8< (ET 2+ ET 4)/(CT 2+ CT 4) <2.7.

Further, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis of the optical imaging lens and an effective radius vertex of the object side surface of the sixth lens, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens, and an edge thickness ET6 of the sixth lens satisfy: -9< (SAG61+SAG62)/ET 6< -6.

By applying the technical scheme of the invention, the optical imaging lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side of the optical imaging lens to the image side of the optical imaging lens, wherein the first lens has positive focal power, the object side of the first lens is a convex surface, and the image side of the first lens is a convex surface; the second lens has negative focal power; the third lens has negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; the fifth lens has positive focal power; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is satisfied between the on-axis distance TTL and the entrance pupil diameter EPD of the optical imaging lens: 1.4< TTL/EPD <1.9.

The light passes through the first lens with positive focal power and the convex object side and image side, so that the light can be greatly deflected, the light is matched with the second lens with negative focal power, the propagation path of the light can be improved, the steep phenomenon of the light is avoided, the chromatic aberration of the optical imaging lens is favorably corrected, the light passes through the third lens, the fourth lens, the fifth lens and the sixth lens with negative and positive alternation, the balanced transmission of the light is mainly ensured comprehensively, the steep phenomenon of the light can not occur under the condition of large aperture of the optical imaging lens, the imaging space of the imaging surface is relatively increased, the compression of the object image space is completed under longer focal length, the imaging quality is ensured under the compression ratio, and perfect imaging is realized. By limiting the TTL/EPD within a reasonable range, the height of the optical imaging lens can be effectively reduced, and the focal length of the optical imaging lens is increased, so that the imaging range of the image space can be fully utilized as far as possible under the condition of imaging at a certain distance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 is a schematic view showing the structure of an optical imaging lens according to a first embodiment of the present invention;

Fig. 2 to 5 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 1, respectively;

Fig. 6 is a schematic structural diagram showing an optical imaging lens according to a second embodiment of the present invention;

Fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 6, respectively;

fig. 11 shows a schematic structural view of an optical imaging lens according to a third embodiment of the present invention;

Fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 11, respectively;

fig. 16 is a schematic view showing the structure of an optical imaging lens according to a fourth embodiment of the present invention;

fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 16, respectively;

fig. 21 is a schematic diagram showing the structure of an optical imaging lens according to a fifth embodiment of the present invention;

fig. 22 to 25 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens in fig. 21, respectively.

Wherein the above figures include the following reference numerals:

STO and diaphragm; e1, a first lens; s1, an object side surface of a first lens; s2, an image side surface of the first lens; e2, a second lens; s3, the object side surface of the second lens; s4, an image side surface of the second lens; e3, a third lens; s5, the object side surface of the third lens is provided; s6, an image side surface of the third lens; e4, a fourth lens; s7, an object side surface of the fourth lens; s8, an image side surface of the fourth lens is provided; e5, a fifth lens; s9, an object side surface of the fifth lens; s10, an image side surface of the fifth lens; e6, a sixth lens; s11, an object side surface of the sixth lens; s12, an image side surface of the sixth lens; e7, a filter; s13, the object side surface of the filter; s14, the image side surface of the filter; s15, an imaging surface.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. Specifically, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the object side becomes the object side of the lens, and the surface of each lens near the image side is called the image side of the lens. The determination of the surface shape in the paraxial region can be performed by a determination method by a person skilled in the art by positive or negative determination of the concave-convex with R value (R means the radius of curvature of the paraxial region, and generally means the R value on a lens database (lens data) in optical software). In the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the image side, the concave surface is determined when the R value is positive, and the convex surface is determined when the R value is negative.

The invention provides an optical imaging lens for solving the problem that an optical imaging lens in the prior art is poor in imaging quality.

As shown in fig. 1 to 25, the optical imaging lens includes, in order from an object side to an image side thereof, a first lens element having positive optical power, a second lens element having a convex object side, a third lens element having a convex image side, a fourth lens element having a fifth lens element and a sixth lens element; the second lens has negative focal power; the third lens has negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the object side surface of the fourth lens is a concave surface; the fifth lens has positive focal power; the sixth lens has negative focal power, and the image side surface of the sixth lens is a concave surface; the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is satisfied between the on-axis distance TTL and the entrance pupil diameter EPD of the optical imaging lens: 1.4< TTL/EPD <1.9.

The light passes through the first lens with positive focal power and the convex object side and image side, so that the light can be greatly deflected, the light is matched with the second lens with negative focal power, the propagation path of the light can be improved, the steep phenomenon of the light is avoided, the chromatic aberration of the optical imaging lens is favorably corrected, the light passes through the third lens, the fourth lens, the fifth lens and the sixth lens with negative and positive alternation, the balanced transmission of the light is mainly ensured comprehensively, the steep phenomenon of the light can not occur under the condition of large aperture of the optical imaging lens, the imaging space of the imaging surface is relatively increased, the compression of the object image space is completed under longer focal length, the imaging quality is ensured under the compression ratio, and perfect imaging is realized. By limiting the TTL/EPD within a reasonable range, the height of the optical imaging lens can be effectively reduced, and the focal length of the optical imaging lens is increased, so that the imaging range of the image space can be fully utilized as far as possible under the condition of imaging at a certain distance.

Preferably, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is as follows: 1.6< TTL/EPD <1.85.

The optical imaging lens also becomes an optical system.

In the present embodiment, the effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD <1.95. By limiting the f/EPD within a reasonable range, the optical system can be ensured to be within a certain aperture range, the size of the luminous flux entering the optical system is improved, and the optical system can clearly image under the condition of enough light transmission. Preferably 1.8< f/EPD <1.92.

In the present embodiment, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens, and the effective focal length f3 of the third lens satisfy: 0.1< (f2+f4)/f3 <2.0. By restraining the focal length relation among the second lens, the third lens and the fourth lens, the focal power of the optical system is reasonably distributed, and the spherical aberration, the coma aberration, the astigmatism, the field curvature, the distortion, the chromatic aberration and other aberration of the optical system are corrected, so that the imaging quality of the optical imaging lens is effectively improved. Preferably 0.2< (f2+f4)/f3 <1.9.

In the present embodiment, the effective focal length f5 of the fifth lens, the effective focal length f of the optical imaging lens, and the effective focal length f1 of the first lens satisfy: 1.0< f 5/(f+f1) <1.7. The focal lengths of the first lens and the fifth lens and the focal length of the optical imaging lens are reasonably distributed, so that the focal power of each lens can be reasonably distributed, the proportion of the aberration generated by the first lens in the comprehensive aberration can be minimized in the comprehensive aberration distribution, the sensitivity of the first lens is reduced, the focal power of the fifth lens is restrained, the field curvature is comprehensively adjusted through the fifth lens, the aberration of the optical system is finally comprehensively corrected, and the imaging quality of the optical imaging lens is improved. Preferably, 1.1< f 5/(f+f1) <1.6.

In the present embodiment, the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: 1.0< (R2-R1)/(R2+R1) <1.7. By restricting the relationship between the image side surface of the first lens and the radius of curvature of the object side surface of the first lens, the optical power of the first lens can be improved, the sensitivity of the first lens can be reduced, and the processability of the first lens can be improved. Preferably, 1.05< (R2-R1)/(R2+R1) <1.6.

In the present embodiment, the radius of curvature R6 of the image side surface of the third lens and the radius of curvature R5 of the object side surface of the third lens and the effective focal length f of the optical imaging lens satisfy: 0.8< (R5+R6)/f <1.5. The focal power of the third lens in the whole optical system is distributed by restraining the relation between the curvature radius of the third lens and the focal length of the optical system, so that the curvature of field can be comprehensively balanced to a certain extent, the distortion of the optical system is reduced, the manufacturability of the third lens is optimized, and the manufacturability performance is improved, so that the processing of the third lens is facilitated. Preferably, 0.9< (R5+R6)/f <1.4.

In this embodiment, the effective half-aperture DT11 of the object side surface of the first lens and the effective half-aperture DT31 of the object side surface of the third lens satisfy: 1.0< DT11/DT31<1.5. By controlling the relation between the caliber of the first lens and the caliber of the third lens, the stable transmission of light rays entering the optical system after refraction of the lenses can be ensured, meanwhile, the arrangement of the front three lenses is facilitated, the sensitivity of the front three lenses is reduced, the technological performance of the optical system is improved, and the yield is improved. Preferably 1.1< DT11/DT31<1.4.

In the present embodiment, the effective half-aperture DT61 of the object side surface of the sixth lens element, the effective half-aperture DT62 of the image side surface of the sixth lens element, and half of the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens element satisfy: 1.2< (DT61+DT62)/ImgH <1.7. The relation between the caliber of the sixth lens and the imaging surface is restrained, the shape of the sixth lens is mainly optimized, ghost shadows generated by internal reflection of the sixth lens are improved, meanwhile, the situation of stray light at the tail end of an optical system can be improved, and the imaging quality of the optical imaging lens is improved. Preferably 1.4< (dt61+dt62)/ImgH <1.6.

In the present embodiment, the combined focal length f123 of the first lens, the second lens, and the third lens, the center thickness CT1 of the first lens, the center thickness CT2 of the second lens, and the center thickness CT3 of the third lens satisfy: 2.5< f 123/(c1+c2+c3) <3.5. The relation between the focal length and the center thickness of the front three lenses is restrained, so that the distribution of optical power is improved, various aberrations such as spherical aberration, coma aberration, field curvature and distortion of an optical system are further improved, meanwhile, the shape of the lenses is favorably optimized, the manufacturability of the optical system is enhanced, and the sensitivity of the optical system is reduced. Preferably, 2.6< f 123/(CT 1+ CT2+ CT 3) <3.4.

In the present embodiment, the on-axis distance TTL from the object side surface of the first lens element to the imaging surface of the optical imaging lens element, and the air interval T56 between the fifth lens element and the sixth lens element on the optical axis satisfy: 4.2< TTL/T56<5.4. The relationship between the air interval of the fifth lens and the sixth lens and the total length of the optical imaging lens is restrained, so that the field curvature of the optical system is comprehensively balanced, and the ghost image generated by reflection between the fifth lens and the sixth lens can be improved. Preferably, 4.4< TTL/T56<5.3.

In the present embodiment, an on-axis distance SAG51 between an intersection point of the object side surface of the fifth lens and the optical axis and an effective radius vertex of the object side surface of the fifth lens and an on-axis distance SAG52 between an intersection point of the image side surface of the fifth lens and the optical axis and an effective radius vertex of the image side surface of the fifth lens satisfy: 1.1< SAG52/SAG51<1.6. By controlling the relation between the sagittal height of the fifth lens, the shape of the fifth lens is optimized, so that the manufacturability of the fifth lens can be improved, and by optimizing the shape of the fifth lens, the curvature of field of the optical system can be balanced, and the ghost image generated by the reflection between the fifth lens and the chip can be improved. Preferably 1.2< SAG52/SAG51<1.5.

In the present embodiment, the edge thickness ET2 of the second lens, the edge thickness ET4 of the fourth lens, the center thickness CT2 of the second lens, and the center thickness CT4 of the fourth lens satisfy: 1.8< (ET 2+ ET 4)/(CT 2+ CT 4) <2.7. By restraining the relation between the edge thickness and the center thickness of the second lens and the fourth lens, the manufacturability of the lenses can be improved, the sensitivity of the lenses can be reduced, and the yield of the optical system can be improved on the premise of optimizing balance aberration. Preferably, 1.9< (ET 2+ ET 4)/(CT 2+ CT 4) <2.6.

In the present embodiment, an on-axis distance SAG61 between an intersection point of the object side surface of the sixth lens and the optical axis and an effective radius vertex of the object side surface of the sixth lens, an on-axis distance SAG62 between an intersection point of the image side surface of the sixth lens and the optical axis and an effective radius vertex of the image side surface of the sixth lens, and an edge thickness ET6 of the sixth lens satisfy: -9< (SAG61+SAG62)/ET 6< -6. By restricting the relation between the sagittal height of the sixth lens and the edge thickness of the sixth lens, the shape of the lens is improved, the manufacturability is enhanced, and meanwhile, the method can be used for balancing the curvature of field of an optical system and reducing the aberration; and meanwhile, by restraining the shape of the lens, the ghost image reflected between the sixth lens and the chip can be optimally improved. Preferably, -8.8< (SAG61+SAG62)/ET 6< -6.5.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface.

The optical imaging lens in the present application may employ a plurality of lenses, for example, the six lenses described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial distance between each lens and the like of each lens, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones and the like. The optical imaging lens also has large aperture and large angle of view. The advantages of ultra-thin and good imaging quality can meet the miniaturization requirement of intelligent electronic products.

In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Examples of specific surface types and parameters applicable to the optical imaging lens of the above embodiment are further described below with reference to the drawings.

Example 1

As shown in fig. 1 to 5, an optical imaging lens according to a first embodiment of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens structure according to a first embodiment.

As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S4 of the second lens element is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is concave. The sixth lens element E6 has negative refractive power, and an object-side surface S11 and an image-side surface S12 of the sixth lens element are concave. The filter E7 has an object side S13 of the filter and an image side S14 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.06mm, the maximum field angle FOV of the optical imaging lens is 49.5 ° the total length TTL of the optical imaging lens is 6.80mm and the image height ImgH is 3.30mm.

Table 1 shows a basic structural parameter table of an optical imaging lens of the first embodiment, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 1

In the first embodiment, the object side surface and the image side surface of any one of the first lens element E1 to the sixth lens element E6 are aspheric, and the surface shape of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:

Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each of the aspherical mirrors S1-S12 in example one are given in Table 2 below.

TABLE 2

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of the first embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 3 shows an astigmatism curve of the optical imaging lens of the first embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4 shows a distortion curve of the optical imaging lens according to the first embodiment, which represents distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens of the first embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

As can be seen from fig. 2 to fig. 5, the optical imaging lens according to the first embodiment can achieve good imaging quality.

Example two

As shown in fig. 6 to 10, an optical imaging lens of a second embodiment of the present application is described. In this embodiment and the following embodiments, a description of portions similar to those of the first embodiment will be omitted for brevity. Fig. 6 shows a schematic diagram of an optical imaging lens structure of the second embodiment.

As shown in fig. 6, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is concave, and an image-side surface S4 of the second lens element is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 of the sixth lens element is convex, and an image-side surface S12 of the sixth lens element is concave. The filter E7 has an object side S13 of the filter and an image side S14 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.05mm, the maximum field angle FOV of the optical imaging lens is 49.5 ° the total length TTL of the optical imaging lens is 6.80mm and the image height ImgH is 3.30mm.

Table 3 shows a basic structural parameter table of an optical imaging lens of the second embodiment, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 3 Table 3

Table 4 shows the higher order coefficients that can be used for each aspherical mirror in embodiment two, where each aspherical surface profile can be defined by equation (1) given in embodiment one above.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-1.6812E-03

1.0119E-04

-1.5791E-03

3.1423E-03

-4.3688E-03

3.8303E-03

-2.1612E-03

S2

-3.3061E-02

8.5136E-02

-9.6892E-02

4.0608E-02

2.8369E-02

-4.8349E-02

3.0304E-02

S3

2.1299E-02

1.4376E-01

-2.7409E-01

3.0041E-01

-2.1530E-01

1.0353E-01

-3.2351E-02

S4

1.6621E-02

1.2196E-01

-2.1590E-01

2.0354E-01

-4.9040E-02

-1.1541E-01

1.5474E-01

S5

-1.2311E-01

9.5630E-02

6.2518E-03

-2.3907E-01

5.7315E-01

-7.8845E-01

7.0527E-01

S6

-1.1132E-01

6.6183E-02

1.4866E-02

-2.1499E-01

5.5543E-01

-8.7195E-01

9.0561E-01

S7

-3.4853E-02

9.8616E-03

1.6157E-01

-5.5111E-01

8.9696E-01

-7.8513E-01

2.0130E-01

S8

-3.9137E-02

8.5493E-02

-5.8722E-02

-6.4906E-02

2.9231E-01

-5.1681E-01

5.5730E-01

S9

-8.2696E-02

-6.2971E-02

6.0608E-01

-2.5009E+00

6.5180E+00

-1.1516E+01

1.4146E+01

S10

-7.5682E-02

3.6913E-02

-9.4636E-03

-1.5890E-01

5.6514E-01

-1.0550E+00

1.2499E+00

S11

-1.6913E-01

1.0751E-01

-7.4374E-02

5.1680E-02

-2.8206E-02

1.0916E-02

-2.8457E-03

S12

-1.8264E-01

1.1044E-01

-6.6546E-02

3.0697E-02

-7.9890E-03

-2.5044E-04

1.0772E-03

Face number

A18

A20

A22

A24

A26

A28

A30

S1

7.7524E-04

-1.7085E-04

2.1025E-05

-1.1026E-06

0.0000E+00

0.0000E+00

0.0000E+00

S2

-1.0798E-02

2.3020E-03

-2.7502E-04

1.4230E-05

0.0000E+00

0.0000E+00

0.0000E+00

S3

5.8193E-03

-3.4993E-04

-5.5073E-05

7.8919E-06

0.0000E+00

0.0000E+00

0.0000E+00

S4

-9.3991E-02

3.1717E-02

-5.6711E-03

3.9344E-04

6.7904E-06

0.0000E+00

0.0000E+00

S5

-4.2028E-01

1.6493E-01

-4.0693E-02

5.6522E-03

-3.2155E-04

-2.8638E-06

0.0000E+00

S6

-6.3127E-01

2.9145E-01

-8.5296E-02

1.4297E-02

-1.0432E-03

0.0000E+00

0.0000E+00

S7

3.1225E-01

-3.8342E-01

1.9711E-01

-5.0792E-02

5.2277E-03

4.6165E-05

0.0000E+00

S8

-3.9152E-01

1.7942E-01

-5.1480E-02

8.3387E-03

-5.7646E-04

0.0000E+00

0.0000E+00

S9

-1.2178E+01

7.2911E+00

-2.9533E+00

7.6054E-01

-1.0755E-01

4.7565E-03

3.5429E-04

S10

-9.9315E-01

5.3671E-01

-1.9469E-01

4.5326E-02

-6.1095E-03

3.6168E-04

0.0000E+00

S11

4.5847E-04

-3.3752E-05

-1.8042E-06

5.8756E-07

-4.1693E-08

4.9004E-10

4.0019E-11

S12

-4.3585E-04

9.4543E-05

-1.2072E-05

8.1652E-07

-1.1660E-08

-1.9071E-09

8.9116E-11

TABLE 4 Table 4

Fig. 7 shows an on-axis chromatic aberration curve of the optical imaging lens of the second embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 8 shows an astigmatism curve of the optical imaging lens of the second embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 9 shows a distortion curve of the optical imaging lens of the second embodiment, which represents distortion magnitude values corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens of the second embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

As can be seen from fig. 7 to fig. 10, the optical imaging lens provided in the second embodiment can achieve good imaging quality.

Example III

As shown in fig. 11 to 15, an optical imaging lens of a third embodiment of the present application is described. Fig. 11 shows a schematic diagram of the structure of an optical imaging lens of the third embodiment.

As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is concave, and an image-side surface S4 of the second lens element is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 of the sixth lens element is convex, and an image-side surface S12 of the sixth lens element is concave. The filter E7 has an object side S13 of the filter and an image side S14 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.05mm, the maximum field angle FOV of the optical imaging lens is 49.5 ° the total length TTL of the optical imaging lens is 6.80mm and the image height ImgH is 3.30mm.

Table 5 shows a basic structural parameter table of an optical imaging lens of the third embodiment, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 5

Table 6 shows the higher order coefficients that can be used for each aspherical mirror in the third embodiment, wherein each aspherical surface profile can be defined by the formula (1) given in the above-described embodiment one.

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-1.7960E-03

3.1932E-04

-1.8259E-03

3.1505E-03

-4.1502E-03

3.6074E-03

-2.0547E-03

S2

-4.2372E-02

1.2726E-01

-1.9078E-01

1.7280E-01

-9.7916E-02

3.5018E-02

-7.6092E-03

S3

1.2506E-02

2.0207E-01

-4.2069E-01

5.2673E-01

-4.4856E-01

2.6790E-01

-1.1163E-01

S4

1.4393E-02

1.5166E-01

-2.9768E-01

3.3775E-01

-1.9193E-01

-1.5288E-02

1.0943E-01

S5

-1.3157E-01

1.0695E-01

1.3811E-02

-3.1705E-01

7.7067E-01

-1.0781E+00

9.7958E-01

S6

-1.2170E-01

7.5735E-02

3.4262E-02

-3.3638E-01

8.6854E-01

-1.3697E+00

1.4280E+00

S7

-3.9915E-02

3.3591E-02

6.8818E-02

-2.2277E-01

9.1158E-02

5.5323E-01

-1.3181E+00

S8

-4.3867E-02

8.1055E-02

2.8935E-02

-3.9697E-01

1.0383E+00

-1.6264E+00

1.6829E+00

S9

-8.5849E-02

-6.3916E-02

5.8660E-01

-2.3208E+00

5.8909E+00

-1.0250E+01

1.2487E+01

S10

-7.7536E-02

3.6312E-02

-1.2939E-02

-1.2083E-01

4.4970E-01

-8.5860E-01

1.0341E+00

S11

-1.6955E-01

1.0225E-01

-6.3746E-02

3.8488E-02

-1.7327E-02

4.7673E-03

-4.2420E-04

S12

-1.8380E-01

1.0784E-01

-6.1776E-02

2.5690E-02

-4.6514E-03

-1.7481E-03

1.5468E-03

Face number

A18

A20

A22

A24

A26

A28

A30

S1

7.4870E-04

-1.6793E-04

2.1040E-05

-1.1233E-06

0.0000E+00

0.0000E+00

0.0000E+00

S2

8.3359E-04

6.8324E-06

-1.2365E-05

9.9264E-07

0.0000E+00

0.0000E+00

0.0000E+00

S3

3.1518E-02

-5.6942E-03

5.8832E-04

-2.6172E-05

0.0000E+00

0.0000E+00

0.0000E+00

S4

-8.1598E-02

3.0025E-02

-5.6446E-03

4.0635E-04

6.8747E-06

0.0000E+00

0.0000E+00

S5

-5.9266E-01

2.3625E-01

-5.9289E-02

8.3926E-03

-4.8683E-04

-4.7694E-06

0.0000E+00

S6

-9.9906E-01

4.6328E-01

-1.3635E-01

2.3021E-02

-1.6954E-03

0.0000E+00

0.0000E+00

S7

1.4899E+00

-9.9410E-01

3.9823E-01

-8.7958E-02

7.7995E-03

1.5031E-04

0.0000E+00

S8

-1.1737E+00

5.4545E-01

-1.6168E-01

2.7599E-02

-2.0607E-03

0.0000E+00

0.0000E+00

S9

-1.0710E+01

6.4091E+00

-2.6030E+00

6.7537E-01

-9.7481E-02

4.8158E-03

2.5484E-04

S10

-8.3214E-01

4.5413E-01

-1.6599E-01

3.8874E-02

-5.2632E-03

3.1259E-04

0.0000E+00

S11

-2.0720E-04

9.2110E-05

-1.7541E-05

1.7715E-06

-8.1115E-08

-1.3243E-10

1.0352E-10

S12

-5.4056E-04

1.1104E-04

-1.3830E-05

9.2759E-07

-1.3850E-08

-2.0863E-09

9.8628E-11

TABLE 6

Fig. 12 shows an on-axis chromatic aberration curve of the optical imaging lens of the third embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 13 shows an astigmatism curve of the optical imaging lens of the third embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 14 shows a distortion curve of the optical imaging lens of the third embodiment, which represents distortion magnitude values corresponding to different angles of view. Fig. 15 shows a magnification chromatic aberration curve of the optical imaging lens of the third embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

As can be seen from fig. 12 to 15, the optical imaging lens according to the third embodiment can achieve good imaging quality.

Example IV

As shown in fig. 16 to 20, an optical imaging lens of a fourth embodiment of the present application is described. Fig. 16 shows a schematic diagram of the structure of an optical imaging lens of the fourth embodiment.

As shown in fig. 16, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is concave, and an image-side surface S4 of the second lens element is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is convex, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, and an object-side surface S11 and an image-side surface S12 of the sixth lens element are concave. The filter E7 has an object side S13 of the filter and an image side S14 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.11mm, the maximum field angle FOV of the optical imaging lens is 49.2 ° the total length TTL of the optical imaging lens is 6.81mm and the image height ImgH is 3.30mm.

Table 7 shows a basic structural parameter table of an optical imaging lens of the fourth embodiment, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 7

Table 8 shows the higher order coefficients that can be used for each aspherical mirror in embodiment four, where each aspherical surface profile can be defined by equation (1) given in embodiment one above.

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TABLE 8

Fig. 17 shows an on-axis chromatic aberration curve of the optical imaging lens of the fourth embodiment, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 18 shows an astigmatism curve of the optical imaging lens of the fourth embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 19 shows a distortion curve of the optical imaging lens of the fourth embodiment, which represents distortion magnitude values corresponding to different angles of view. Fig. 20 shows a magnification chromatic aberration curve of the optical imaging lens of the fourth embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

As can be seen from fig. 17 to 20, the optical imaging lens according to the fourth embodiment can achieve good imaging quality.

Example five

As shown in fig. 21 to 25, an optical imaging lens of a fifth embodiment of the present application is described. Fig. 21 shows a schematic diagram of the structure of an optical imaging lens of the fifth embodiment.

As shown in fig. 21, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is convex, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 of the second lens element is concave, and an image-side surface S4 of the second lens element is convex. The third lens element E3 has negative refractive power, wherein an object-side surface S5 of the third lens element is convex, and an image-side surface S6 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 of the fourth lens element is concave, and an image-side surface S8 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 of the fifth lens element is concave, and an image-side surface S10 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, and an object-side surface S11 and an image-side surface S12 of the sixth lens element are concave. The filter E7 has an object side S13 of the filter and an image side S14 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In the present embodiment, the total effective focal length f of the optical imaging lens is 7.16mm, the maximum field angle FOV of the optical imaging lens is 49.8 ° the total length TTL of the optical imaging lens is 6.80mm and the image height ImgH is 3.37mm.

Table 9 shows a basic structural parameter table of an optical imaging lens of the fifth embodiment, in which the units of radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 9

Table 10 shows the higher order coefficients that can be used for each aspherical mirror in embodiment five, where each aspherical surface profile can be defined by equation (1) given in embodiment one above.

/>

Table 10

Fig. 22 shows an on-axis chromatic aberration curve of the optical imaging lens of the fifth embodiment, which represents a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 23 shows an astigmatism curve of the optical imaging lens of the fifth embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 24 shows a distortion curve of the optical imaging lens of the fifth embodiment, which represents distortion magnitude values corresponding to different angles of view. Fig. 25 shows a magnification chromatic aberration curve of the optical imaging lens of the fifth embodiment, which represents the deviation of different image heights on the imaging plane after light passes through the lens.

As can be seen from fig. 22 to 25, the optical imaging lens according to the fifth embodiment can achieve good imaging quality.

In summary, embodiments one to five satisfy the relationships shown in table 11, respectively.

Condition/example	1	2	3	4	5
						TTL/EPD	1.79	1.80	1.80	1.80	1.81
f/EPD	1.86	1.86	1.86	1.88	1.90
						(f2+f4)/f3	0.22	0.66	0.78	1.31	1.82
f5/(f+f1)	1.18	1.51	1.48	1.33	1.49
						(R2-R1)/(R2+R1)	1.10	1.33	1.33	1.51	1.58
(R5+R6)/f	1.36	1.05	1.02	1.00	1.14
						DT11/DT31	1.18	1.20	1.21	1.27	1.30
(DT61+DT62)/ImgH	1.52	1.56	1.56	1.57	1.53
						f123/(CT1+CT2+CT3)	3.28	3.05	3.07	3.15	3.16
TTL/T56	4.75	5.23	5.27	4.96	4.53
						SAG52/SAG51	1.27	1.33	1.33	1.42	1.42
(ET2+ET4)/(CT2+CT4)	2.46	2.18	2.16	2.06	1.99
						(SAG61+SAG62)/ET6	-8.56	-6.78	-6.73	-7.12	-7.40

TABLE 11

Table 12 shows the effective focal lengths f of the optical imaging lenses of the first to fifth embodiments, and the effective focal lengths f1 to f6 of the respective lenses.

Example parameters	1	2	3	4	5
						f1(mm)	3.99	3.63	3.62	3.42	3.30
f2(mm)	-8.29	-8.43	-8.58	-8.24	-8.29
						f3(mm)	-110.06	-34.92	-29.72	-17.26	-13.47
f4(mm)	-16.19	-14.58	-14.61	-14.31	-16.22
						f5(mm)	13.05	16.12	15.76	14.04	15.53
f6(mm)	-6.56	-7.63	-7.66	-7.61	-7.61
						f(mm)	7.06	7.05	7.05	7.11	7.16
TTL(mm)	6.80	6.80	6.80	6.81	6.80
						ImgH(mm)	3.30	3.30	3.30	3.30	3.37
FOV(°)	49.5	49.5	49.5	49.2	49.8

Table 12

The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

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

the lens comprises a first lens and a second lens, wherein the first lens has positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a convex surface;

A second lens having negative optical power;

the third lens is provided with negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface;

the fourth lens is provided with negative focal power, and the object side surface of the fourth lens is a concave surface;

A fifth lens having positive optical power;

A sixth lens having negative optical power, an image side surface of the sixth lens being a concave surface;

The on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens is satisfied between the on-axis distance TTL and the entrance pupil diameter EPD of the optical imaging lens: 1.4< TTL/EPD <1.9;

The combined focal length f123 of the first lens, the second lens and the third lens, the central thickness CT1 of the first lens, and the central thickness CT2 of the second lens and the central thickness CT3 of the third lens satisfy: 2.5< f 123/(c1+c2+c3) <3.5.

2. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and an entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD <1.95.

3. The optical imaging lens of claim 1, wherein an effective focal length f2 of the second lens, an effective focal length f4 of the fourth lens, and an effective focal length f3 of the third lens satisfy: 0.1< (f2+f4)/f3 <2.0.

4. The optical imaging lens of claim 1, wherein an effective focal length f5 of the fifth lens, an effective focal length f of the optical imaging lens, and an effective focal length f1 of the first lens satisfy: 1.0< f 5/(f+f1) <1.7.

5. The optical imaging lens of claim 1, wherein a radius of curvature R2 of an image side surface of the first lens and a radius of curvature R1 of an object side surface of the first lens satisfy: 1.0< (R2-R1)/(R2+R1) <1.7.

6. The optical imaging lens of claim 1, wherein a radius of curvature R6 of an image side of the third lens and a radius of curvature R5 of an object side of the third lens satisfy between: 0.8< (R5+R6)/f <1.5.

7. The optical imaging lens as claimed in claim 1, wherein the effective half-aperture DT11 of the object side surface of the first lens and the effective half-aperture DT31 of the object side surface of the third lens satisfy: 1.0< DT11/DT31<1.5.

8. The optical imaging lens as claimed in claim 1, wherein between an effective half-caliber DT61 of an object side surface of the sixth lens, an effective half-caliber DT62 of an image side surface of the sixth lens, and half an ImgH of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens, it is satisfied that: 1.2< (DT61+DT62)/ImgH <1.7.

9. The optical imaging lens of claim 1, wherein an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the optical imaging lens, an air space T56 between the fifth lens and the sixth lens on an optical axis of the optical imaging lens, satisfy: 4.2< TTL/T56<5.4.

10. The optical imaging lens according to claim 1, wherein an on-axis distance SAG51 between an intersection of an object side surface of the fifth lens and an optical axis of the optical imaging lens to an effective radius vertex of the object side surface of the fifth lens and an on-axis distance SAG52 between an intersection of an image side surface of the fifth lens and the optical axis to an effective radius vertex of the image side surface of the fifth lens satisfy: 1.1< SAG52/SAG51<1.6.

11. The optical imaging lens of claim 1, wherein an edge thickness ET2 of the second lens, an edge thickness ET4 of the fourth lens, a center thickness CT2 of the second lens, and a center thickness CT4 of the fourth lens satisfy: 1.8< (ET 2+ ET 4)/(CT 2+ CT 4) <2.7.

12. The optical imaging lens according to claim 1, wherein an on-axis distance SAG61 between an intersection of an object side surface of the sixth lens and an optical axis of the optical imaging lens to an effective radius vertex of the object side surface of the sixth lens, an on-axis distance SAG62 between an intersection of an image side surface of the sixth lens and the optical axis to an effective radius vertex of the image side surface of the sixth lens, and an edge thickness ET6 of the sixth lens satisfy:

-9<(SAG61+SAG62)/ET6<-6。