CN114236759B

CN114236759B - Optical imaging lens

Info

Publication number: CN114236759B
Application number: CN202111526149.XA
Authority: CN
Inventors: 刘子维; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2024-05-31
Anticipated expiration: 2041-12-14
Also published as: CN114236759A

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: a diaphragm, a first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; a third lens having optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; and a sixth lens having optical power. The invention solves the problems that the miniaturization and high image quality of the optical imaging lens are difficult to be compatible 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

With the continuous development of the smart phone shooting technology, the shooting module is developed from single shooting, double shooting to three shooting, even four shooting. At least one of the multiple lenses is in the form of an ultra-wide angle lens, which has become the dominant trend. Meanwhile, as the mobile phone is developed in the direction of light weight and thin, the optical imaging lens needs to be designed in the direction of miniaturization, and the imaging quality of the optical imaging lens is easily sacrificed.

That is, the optical imaging lens in the prior art has the problem that miniaturization and high image quality are difficult to be compatible.

Disclosure of Invention

The invention mainly aims to provide an optical imaging lens, which solves the problem that the optical imaging lens in the prior art has both miniaturization and high image quality.

In order to achieve the above object, according to one aspect of the present invention, there is provided 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: a diaphragm, a first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; a third lens having optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; and a sixth lens having optical power.

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: DT31/DT11 is not less than 1.74.

Further, the maximum focal length f2max of the second lens and the minimum focal length f2min of the second lens satisfy: |f2max/f2min| >5.

Further, the minimum focal length fmin of the optical imaging lens and the maximum focal length fmax of the optical imaging lens satisfy: fmax/fmin < 1.2.

Further, the radius of the object-side surface of the second lens is variable, and the radius R3 of the object-side surface of the second lens satisfies: r3 is more than or equal to 88mm.

Further, the focal length f2 of the second lens satisfies: |f2| >200mm.

Further, the air interval T45 of the fourth lens and the fifth lens on the optical axis of the optical imaging lens and the center thickness CT4 of the fourth lens on the optical axis satisfy: CT4/T45 is more than 0 and less than 1.5.

Further, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1< TTL/ImgH < 1.5.

Further, half of the maximum field angle of the optical imaging lens, semi-FOV, satisfies: the Semi-FOV is more than 45 degrees.

Further, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: -7 < f4/f < 0.

Further, the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: 1.86 < (R7+R8)/(R7-R8) < 7.49.

Further, the center thickness CT1 of the first lens on the optical axis of the optical imaging lens and the center thickness CT3 of the third lens on the optical axis satisfy: CT1/CT3 is more than 1.0 and less than 2.0.

Further, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the sum Σct of the center thicknesses of all lenses of the optical imaging lens on the optical axis of the optical imaging lens satisfy: 1 < TTL/ΣCT < 2.

Further, the center thickness CT5 of the fifth lens on the optical axis of the optical imaging lens and the center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.8 and less than 3.

Further, the abbe number of at least two lenses of the first lens to the fifth lens is smaller than 20, and the minimum value Vimin of the abbe numbers in all lenses of the optical imaging lens satisfies: 10.0< Vinmin <20.0.

Further, the fifth lens satisfies between a center thickness CT5 on the optical axis of the optical imaging lens and an edge thickness ET5 of the fifth lens: ET5/CT5<0.5.

According to another aspect of the present invention, there is provided 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: a diaphragm, a first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; a third lens having optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having optical power; the focal length f2 of the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: 0< | (f/f 2) <1.5.

Further, the focal length f2 of the second lens satisfies: |f2| >200mm.

By applying the technical scheme of the invention, the method sequentially comprises the following steps from the object side of the optical imaging lens to the image side of the optical imaging lens: a stop, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; the third lens has optical power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has optical power.

The positive and negative distribution of the focal power of each lens of the optical imaging lens is reasonably controlled, so that the low-order aberration of the optical imaging lens can be effectively balanced, the sensitivity of the tolerance of the optical imaging lens can be reduced, the miniaturization of the optical imaging lens is kept, and the imaging quality of the optical imaging lens is ensured. The focal power of the second lens can be continuously changed, so that the imaging performance of the optical imaging lens at different object distances is greatly improved, and the optical imaging lens can meet shooting requirements at different object distances. The change of the focal length can be realized through the control of the second lens, and meanwhile, the length of the whole optical imaging lens is greatly shortened through the arrangement of the second lens, so that the structure of the optical imaging lens is more compact, the miniaturization requirement is met, and the imaging quality of the optical imaging lens is ensured.

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 an example one of the present invention;

fig. 2 to 7 show an on-axis chromatic aberration curve, an astigmatism curve in a second state, a distortion curve in a second state, an astigmatism curve in a third state, a distortion curve in a third state, and a magnification chromatic aberration curve of the optical imaging lens in fig. 1, respectively;

fig. 8 is a schematic diagram showing the structure of an optical imaging lens of example two of the present invention;

Fig. 9 to 14 show an on-axis chromatic aberration curve, an astigmatism curve in a second state, a distortion curve in a second state, an astigmatism curve in a third state, a distortion curve in a third state, and a magnification chromatic aberration curve of the optical imaging lens in fig. 8, respectively;

fig. 15 is a schematic view showing the structure of an optical imaging lens of example three of the present invention;

fig. 16 to 21 show an on-axis chromatic aberration curve, an astigmatism curve in the second state, a distortion curve in the second state, an astigmatism curve in the third state, a distortion curve in the third state, and a magnification chromatic aberration curve of the optical imaging lens in fig. 15, respectively;

fig. 22 is a schematic diagram showing the structure of an optical imaging lens of example four of the present invention;

Fig. 23 to 28 show an on-axis chromatic aberration curve, an astigmatism curve in the second state, a distortion curve in the second state, an astigmatism curve in the third state, a distortion curve in the third state, and a magnification chromatic aberration curve of the optical imaging lens in fig. 22, respectively;

fig. 29 is a schematic view showing the structure of an optical imaging lens of example five of the present invention;

fig. 30 to 35 show an on-axis chromatic aberration curve, an astigmatism curve in the second state, a distortion curve in the second state, an astigmatism curve in the third state, a distortion curve in the third state, and a magnification chromatic aberration curve of the optical imaging lens in fig. 29, respectively;

fig. 36 shows a schematic structural view of the second lens in fig. 1.

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; s7, the object side surface of the third lens; s8, an image side surface of the third lens; e4, a fourth lens; s9, an object side surface of the fourth lens; s10, an image side surface of the fourth lens; e5, a fifth lens; s11, an object side surface of the fifth lens; s12, an image side surface of the fifth lens; e6, a sixth lens; s13, an object side surface of the sixth lens; s14, an image side surface of the sixth lens; e7 filter plates; s15, the object side surface of the filter; s16, an image side surface of the filter; s17, 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, which aims to solve the problem that miniaturization and high image quality are difficult to be achieved in the optical imaging lens in the prior art.

With the continuous development of the smart phone shooting technology, the shooting module is developed from single shooting, double shooting to three shooting, even four shooting. The main trend is to mount at least one ultra-wide angle lens; meanwhile, on the premise of ensuring that the aperture of the mobile phone is small enough and the attractive appearance of the mobile phone is not affected, how to improve the focusing speed and obtain clear images becomes an increasing demand for people. Therefore, the invention provides the optical imaging lens which has a large field angle and can obtain the effect of rapid focusing to obtain clear imaging on the basis of ensuring the miniaturization of the optical imaging lens.

As shown in fig. 1 to 36, from the object side of the optical imaging lens to the image side of the optical imaging lens, sequentially includes: a stop, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; the third lens has optical power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has optical power.

In the present embodiment, 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: DT31/DT11 is not less than 1.74. Through the control of DT31/DT11, on one hand, the size of the front end of the optical imaging lens can be reduced, so that the whole optical imaging lens is lighter and thinner; on the other hand, the range of the incident light is reasonably limited, light with poor edge quality is removed, off-axis aberration is reduced, the resolution of the optical imaging lens is effectively improved, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.74.ltoreq.DT 31/DT 11.ltoreq.2.5.

In the present embodiment, the maximum focal length f2max of the second lens and the minimum focal length f2min of the second lens satisfy: |f2max/f2min| >5. The f2max/f2min is limited in a reasonable range, so that the optical imaging lens can focus in a larger focal length variation range, and a plurality of focal length photos (high focusing speed) are sampled during shooting by combining a second lens corresponding driving algorithm, and all positions of a picture are combined into an image according to the most clear position of the sampled focal length, so that a full-picture clear image is obtained. The optical imaging lens in the present embodiment can realize quick focusing due to the arrangement of the second lens. Preferably, 5 < |f2max/f2min| < 15.

In the present embodiment, the minimum focal length fmin of the optical imaging lens and the maximum focal length fmax of the optical imaging lens satisfy: fmax/fmin < 1.2. The optical focal power of the optical imaging lens can be reasonably distributed by reasonably controlling the ratio of the minimum focal length to the maximum focal length of the optical imaging lens, so that the optical imaging lens has good imaging quality, the sensitivity is reduced, and the imaging quality of the optical imaging lens is ensured. Preferably, 0.9 < fmax/fmin < 1.2.

In this embodiment, the radius of the object-side surface of the second lens is variable, and the radius R3 of the object-side surface of the second lens satisfies: r3 is more than or equal to 88mm. By changing the radius of the object side surface of the second lens, the optical imaging lens can realize quick focusing under the condition of small object distance. Preferably 88 mm.ltoreq.R3.ltoreq.1000 mm.

In the present embodiment, the focal length f2 of the second lens satisfies: |f2| >200mm. The focal length of the second lens is controlled within a certain range, so that the duty ratio of the shot object in the image plane can be increased, and meanwhile, a full-picture clear image can be obtained by combining an algorithm corresponding to the driving of the second lens.

In the present embodiment, the air interval T45 of the fourth lens and the fifth lens on the optical axis of the optical imaging lens and the center thickness CT4 of the fourth lens on the optical axis satisfy: CT4/T45 is more than 0 and less than 1.5. By controlling the air space of the fourth lens and the fifth lens on the optical axis and the center thickness of the fourth lens, the risk of ghost images between the fourth lens and the fifth lens can be reduced, and the size compression of the optical imaging lens is facilitated, and the miniaturization of the optical imaging lens is facilitated. Preferably, 0.5 < CT4/T45 < 1.3.

In this embodiment, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and half of the diagonal length ImgH of the effective pixel area on the imaging surface satisfy: 1< TTL/ImgH < 1.5. By controlling TTL/ImgH within a reasonable range, the total length of the optical imaging lens can be controlled, and the miniaturization of the optical imaging lens is satisfied. Preferably 1.2< TTL/ImgH < 1.4.

In this embodiment, half of the maximum field angle Semi-FOV of the optical imaging lens satisfies: the Semi-FOV is more than 45 degrees. Through optimizing the optical imaging lens, the maximum market angle of the optical imaging lens is larger than 90 degrees, and the optical imaging lens can realize the characteristic of wide angle.

In the present embodiment, the effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens satisfy: -7 < f4/f <0. By limiting f4/f in a reasonable range, the on-axis spherical aberration generated by the optical imaging lens can be constrained in a reasonable interval, and the imaging quality of a visual field on an optical axis is ensured. Preferably, -6 < f4/f < -1.

In the present embodiment, the curvature radius R8 of the image side surface of the fourth lens and the curvature radius R7 of the object side surface of the fourth lens satisfy: 1.86 < (R7+R8)/(R7-R8) < 7.49. By controlling the curvature radius of the fourth lens, the refraction angle of the light beam at the fourth lens can be effectively controlled, and the imaging quality of the optical imaging lens is ensured. While ensuring good processing characteristics of the fourth lens. Preferably, 2 < (R7+R8)/(R7-R8) < 7.

In the present embodiment, the center thickness CT1 of the first lens on the optical axis of the optical imaging lens and the center thickness CT3 of the third lens on the optical axis satisfy: CT1/CT3 is more than 1.0 and less than 2.0. The distortion amount of the optical imaging lens can be reasonably regulated and controlled by controlling the ratio of the center thicknesses of the first lens and the third lens, so that the distortion of the optical imaging lens is in a certain range, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.05 < CT1/CT3 < 1.9.

In the present embodiment, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the sum Σct of the center thicknesses of all lenses of the optical imaging lens on the optical axis of the optical imaging lens satisfy: 1 < TTL/ΣCT < 2. By controlling the TTL/Sigma CT within a reasonable range, the distortion of the optical imaging lens can be reasonably controlled, so that the optical imaging lens has good distortion performance, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.4 < TTL/ΣCT < 1.8.

In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis of the optical imaging lens and the center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.8 and less than 3. The distortion amount of the optical imaging lens can be reasonably regulated and controlled by controlling the CT5/CT6 within a reasonable range, and finally the distortion of the optical imaging lens is controlled within a certain range, so that the imaging quality of the optical imaging lens is ensured. Preferably, 1.85 < CT5/CT6 < 2.5.

In this embodiment, the abbe number of at least two lenses of the first lens to the fifth lens is less than 20, and the minimum value Vimin of the abbe numbers in all the lenses of the optical imaging lens satisfies: 10.0< Vinmin <20.0. By controlling the Abbe number of the lens, the chromatic aberration of the optical imaging lens can be effectively reduced, the occurrence of imaging overlapping is prevented, and better imaging quality is further obtained.

In the present embodiment, the fifth lens satisfies between the center thickness CT5 on the optical axis of the optical imaging lens and the edge thickness ET5 of the fifth lens: ET5/CT5<0.5. By controlling ET5/CT5 within a reasonable range, the height of the whole optical imaging lens can be reduced, meanwhile, the processability of the optical imaging lens is ensured, and the risk of weld marks is reduced. Preferably, 0.2< ET5/CT5<0.4.

Example two

The optical imaging lens includes, in order from an object side to an image side of the optical imaging lens as shown in fig. 1 to 36, a stop, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having positive optical power; the second lens is a liquid lens, the focal power of the second lens is continuously variable, and the object side surface of the second lens is a convex surface; the third lens has optical power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has optical power; the focal length f2 of the second lens and the effective focal length f of the optical imaging lens satisfy the following conditions: 0< | (f/f 2) <1.5.

The positive and negative distribution of the focal power of each lens of the optical imaging lens is reasonably controlled, so that the low-order aberration of the optical imaging lens can be effectively balanced, the sensitivity of the tolerance of the optical imaging lens can be reduced, the miniaturization of the optical imaging lens is kept, and the imaging quality of the optical imaging lens is ensured. The focal power of the second lens can be continuously changed, so that the imaging performance of the optical imaging lens at different object distances is greatly improved, and the optical imaging lens can meet shooting requirements at different object distances. The change of the focal length can be realized through the control of the second lens, and meanwhile, the length of the whole optical imaging lens is greatly shortened through the arrangement of the second lens, so that the structure of the optical imaging lens is more compact, the miniaturization requirement is met, and the imaging quality of the optical imaging lens is ensured. By controlling the ratio of the effective focal length of the second lens to the effective focal length of the optical imaging lens within a certain range, the focal power of the optical imaging lens can be reasonably distributed, so that the optical imaging lens has good imaging quality.

Preferably, the focal length f2 of the second lens and the effective focal length f of the optical imaging lens satisfy: 0.2< | (f/f 2) < 100| <1.0. In the present embodiment, 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: DT31/DT11 is not less than 1.74. Through the control of DT31/DT11, on one hand, the size of the front end of the optical imaging lens can be reduced, so that the whole optical imaging lens is lighter and thinner; on the other hand, the range of the incident light is reasonably limited, light with poor edge quality is removed, off-axis aberration is reduced, the resolution of the optical imaging lens is effectively improved, and the imaging quality of the optical imaging lens is ensured. Preferably, 1.74.ltoreq.DT 31/DT 11.ltoreq.2.5.

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.

It should be noted that any of the following examples one to five is applicable to all embodiments of the present application.

Example one

As shown in fig. 1 to 7, an optical imaging lens according to an example one of the present application is described. Fig. 1 shows a schematic diagram of an optical imaging lens structure of example one.

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 S17.

The first lens element E1 has positive refractive power, wherein an object-side surface S1 of the first lens element is concave, and an image-side surface S2 of the first lens element is convex. The second lens element E2 has positive refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S6 of the second lens element is planar. The third lens element E3 has negative refractive power, wherein an object-side surface S7 of the third lens element is convex, and an image-side surface S8 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S9 of the fourth lens element is convex, and an image-side surface S10 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S11 of the fifth lens element is concave, and an image-side surface S12 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S13 of the fifth lens element is convex, and an image-side surface S14 of the fifth lens element is concave. The filter E7 has an object side S15 of the filter and an image side S16 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

When the object distance of the optical imaging lens is 400mm, the optical imaging lens is in a first state, when the object distance of the optical imaging lens is 150mm, the optical imaging lens is in a second state, and when the object distance of the optical imaging lens is 1200mm, the optical imaging lens is in a third state.

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

TABLE 1

Table 2 shows a basic structural parameter table of the second lens in the second state of the optical imaging lens of example one, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Coefficient of taper
							S3	Spherical surface	88.0000	0.0200	1.53	65.4
S4	Spherical surface	88.0000	0.2650	1.57	30.0
							S5	Spherical surface	Infinity is provided	0.1000	1.52	64.2
S6	Spherical surface	Infinity is provided	0.2200

TABLE 2

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

TABLE 3 Table 3

Table 4 shows the effective focal lengths of the optical imaging lens and the effective focal length of the second lens in three states of the optical imaging lens of example one.

Example one	First state	Second state	Third state
				OBJ(mm)	400.00	150.00	1200.00
f(mm)	2.59	2.57	2.60
				f2(mm)	685.97	241.46	2414.63
f4/f	-2.34	-2.37	-2.33
				(f/ft)*100	0.38	1.06	0.11

TABLE 4 Table 4

In the first example, the object side surface and the image side surface of any one of the first lens element E1, the third lens element E3 and 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 that can be used for each of the aspherical mirrors S1, S2, S7-S14 in example one are given in Table 5 below.

TABLE 5

Fig. 2 shows an on-axis chromatic aberration curve of the optical imaging lens of example one, which indicates the deviation of the converging focus 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 example one in the second state, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4 shows a distortion curve of the optical imaging lens of example one in the second state, which represents distortion magnitude values corresponding to different angles of view. Fig. 5 shows an astigmatism curve of the optical imaging lens of example one in the third state. Fig. 6 shows a distortion curve of the optical imaging lens of example one in the third state. Fig. 7 shows a magnification chromatic aberration curve of the optical imaging lens of example one, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens.

As can be seen from fig. 2 to fig. 7, the optical imaging lens according to the example one can achieve good imaging quality.

Example two

As shown in fig. 8 to 14, an optical imaging lens of an example two of the present application is described. In this example and the following examples, a description of portions similar to those of example one will be omitted for the sake of brevity. Fig. 8 is a schematic diagram showing the structure of an optical imaging lens of example two.

As shown in fig. 8, 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 S17.

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 positive refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S6 of the second lens element is planar. The third lens element E3 has positive refractive power, wherein an object-side surface S7 of the third lens element is convex, and an image-side surface S8 of the third lens element is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S9 of the fourth lens element is convex, and an image-side surface S10 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S11 of the fifth lens element is concave, and an image-side surface S12 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S13 of the fifth lens element is convex, and an image-side surface S14 of the fifth lens element is concave. The filter E7 has an object side S15 of the filter and an image side S16 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Table 6 shows a basic structural parameter table of the optical imaging lens of example two in the first state, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

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TABLE 6

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

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Coefficient of taper
							S3	Spherical surface	88.0000	0.0200	1.53	65.4
S4	Spherical surface	88.0000	0.2650	1.57	30.0
							S5	Spherical surface	Infinity is provided	0.1000	1.52	64.2
S6	Spherical surface	Infinity is provided	0.0700

TABLE 7

Table 8 shows a basic structural parameter table of the second lens in the third state of the optical imaging lens of example two, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Coefficient of taper
							S3	Spherical surface	880.0000	0.0200	1.53	65.4
S4	Spherical surface	880.0000	0.2650	1.57	30.0
							S5	Spherical surface	Infinity is provided	0.1000	1.52	64.2
S6	Spherical surface	Infinity is provided	0.0700

TABLE 8

Table 9 shows the effective focal length of the optical imaging lens and the effective focal length of the second lens in the optical imaging lens of example two in three states.

Example two	First state	Second state	Third state
				OBJ(mm)	400.00	150.00	1200.00
f(mm)	2.66	2.64	2.67
				f2(mm)	662.02	233.03	2330.29
f4/f	-2.21	-2.23	-2.20
				(f/ft)*100	0.40	1.13	0.11

TABLE 9

Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example two, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

S1

-1.5641E-02

-1.4293E-03

-3.0013E-05

-1.2732E-05

-7.9680E-07

-1.4005E-06

S2

-5.3419E-02

-1.6734E-03

-4.4575E-05

-1.2064E-05

-3.2744E-06

-3.3374E-07

S7

-2.9416E-02

-1.6434E-02

1.2050E-02

-4.0902E-04

-2.8610E-04

-2.3272E-04

S8

3.6715E-02

-4.2222E-02

1.6856E-02

-2.4423E-03

6.0237E-04

-2.1219E-04

S9

-9.9235E-02

-6.7750E-03

9.6601E-04

-4.1856E-03

1.2342E-03

2.6227E-05

S10

-1.1635E-01

2.0268E-02

-6.5391E-03

-7.7531E-04

1.0155E-03

1.2072E-04

S11

9.2676E-02

1.1560E-02

2.7297E-03

-8.6445E-04

-1.0225E-03

-8.9921E-05

S12

1.5331E-01

9.8009E-03

3.4749E-02

-1.3271E-03

2.1032E-03

-2.0812E-03

S13

-1.9586E+00

1.3069E-01

-4.3906E-02

6.7220E-03

-4.3448E-03

-3.9494E-04

S14

-1.3028E+00

1.2861E-01

-6.1364E-02

1.6054E-02

-3.9810E-03

9.7680E-04

Face number

A16

A18

A20

A22

A24

A26

S1

-3.8064E-07

-2.1315E-06

-2.2519E-06

0.0000E+00

S2

-1.8047E-06

4.4766E-07

7.8048E-07

0.0000E+00

S7

6.5942E-05

3.0039E-05

-1.3229E-05

0.0000E+00

S8

6.4071E-05

1.7248E-05

-1.9080E-05

0.0000E+00

S9

4.8014E-05

-4.2568E-06

2.0006E-05

0.0000E+00

S10

-1.8150E-04

7.2972E-05

4.6504E-05

0.0000E+00

S11

1.5992E-04

-5.0532E-05

-2.7329E-05

9.1737E-06

-4.7396E-06

0.0000E+00

S12

-5.3056E-04

-4.6811E-04

7.5250E-06

-1.8425E-05

4.0669E-05

0.0000E+00

S13

-4.8820E-04

-2.4669E-04

9.7454E-05

1.4315E-05

-3.8848E-05

-5.2695E-06

S14

-1.1164E-03

-9.3046E-05

3.2378E-04

6.9054E-05

2.6197E-04

1.3282E-05

Table 10

Fig. 9 shows an on-axis chromatic aberration curve of the optical imaging lens of example two, which indicates the deviation of the converging focus of light rays of different wavelengths after passing through the optical imaging lens. Fig. 10 shows an astigmatism curve of the optical imaging lens of example two in the second state, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 11 shows a distortion curve of the optical imaging lens of example two in the second state, which represents distortion magnitude values corresponding to different angles of view. Fig. 12 shows an astigmatism curve of the optical imaging lens of example two in the third state. Fig. 13 shows a distortion curve of the optical imaging lens of example two in the third state. Fig. 14 shows a magnification chromatic aberration curve of the optical imaging lens of example two, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens.

As can be seen from fig. 9 to 14, the optical imaging lens provided in example two can achieve good imaging quality.

Example three

As shown in fig. 15 to 21, an optical imaging lens of example three of the present application is described. Fig. 15 shows a schematic diagram of the structure of an optical imaging lens of example three.

As shown in fig. 15, 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 S17.

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 positive refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S6 of the second lens element is planar. The third lens element E3 has positive refractive power, wherein an object-side surface S7 of the third lens element is convex, and an image-side surface S8 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S9 of the fourth lens element is convex, and an image-side surface S10 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S11 of the fifth lens element is convex, and an image-side surface S12 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S13 of the fifth lens element is convex, and an image-side surface S14 of the fifth lens element is concave. The filter E7 has an object side S15 of the filter and an image side S16 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Table 11 shows a basic structural parameter table of the optical imaging lens of example three in the first state, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 11

Table 12 shows a basic structural parameter table of the second lens in the second state of the optical imaging lens of example three, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Table 12

Table 13 shows a basic structural parameter table of the second lens in the third state of the optical imaging lens of example three, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

TABLE 13

Table 14 shows the effective focal lengths of the optical imaging lens and the second lens in the three states of the optical imaging lens of example three.

Example three	First state	Second state	Third state
				OBJ(mm)	400.00	150.00	1200.00
f(mm)	2.66	2.64	2.67
				f2(mm)	662.02	233.03	2330.29
f4/f	-2.79	-2.81	-2.77
				(f/ft)*100	0.40	1.13	0.11

TABLE 14

Table 15 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example three, where each of the aspherical surface types can be defined by the formula (1) given in example one above.

TABLE 15

Fig. 16 shows an on-axis chromatic aberration curve of the optical imaging lens of example three, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 17 shows an astigmatism curve of the optical imaging lens of example three in the second state, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 18 shows a distortion curve of the optical imaging lens of example three in the second state, which represents distortion magnitude values corresponding to different angles of view. Fig. 19 shows an astigmatism curve of the optical imaging lens of example three in the third state. Fig. 20 shows a distortion curve of the optical imaging lens of example three in the third state. Fig. 21 shows a magnification chromatic aberration curve of the optical imaging lens of example three, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging lens.

As can be seen from fig. 16 to 21, the optical imaging lens given in example three can achieve good imaging quality.

Example four

As shown in fig. 22 to 28, an optical imaging lens of example four of the present application is described. Fig. 22 shows a schematic diagram of the structure of an optical imaging lens of example four.

As shown in fig. 22, 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 S17.

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 positive refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S6 of the second lens element is planar. The third lens element E3 has positive refractive power, wherein an object-side surface S7 of the third lens element is convex, and an image-side surface S8 of the third lens element is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S9 of the fourth lens element is convex, and an image-side surface S10 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S11 of the fifth lens element is convex, and an image-side surface S12 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S13 of the fifth lens element is convex, and an image-side surface S14 of the fifth lens element is concave. The filter E7 has an object side S15 of the filter and an image side S16 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Table 16 shows a basic structural parameter table of the optical imaging lens of example four in the first state, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Table 16

Table 17 shows a basic structural parameter table of the second lens in the second state of the optical imaging lens of example four, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Coefficient of taper
							S3	Spherical surface	88.0000	0.0200	1.53	65.4
S4	Spherical surface	88.0000	0.2650	1.57	30.0
							S5	Spherical surface	Infinity is provided	0.1000	1.52	64.2
S6	Spherical surface	Infinity is provided	0.0754

TABLE 17

Table 18 shows a basic structural parameter table of the second lens in the third state of the optical imaging lens of example four, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Face number	Surface type	Radius of curvature	Thickness of (L)	Refractive index	Abbe number	Coefficient of taper
							S3	Spherical surface	880.0000	0.0200	1.53	65.4
S4	Spherical surface	880.0000	0.2650	1.57	30.0
							S5	Spherical surface	Infinity is provided	0.1000	1.52	64.2
S6	Spherical surface	Infinity is provided	0.0754

TABLE 18

Table 19 shows the effective focal lengths of the optical imaging lens and the effective focal length of the second lens in the three states of the optical imaging lens of example four.

TABLE 19

Table 20 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example four, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Face number

A4

A6

A8

A10

A12

A14

S1

-1.8591E-02

-1.1153E-03

-3.4582E-05

-6.2680E-06

-4.0249E-06

-4.5734E-06

S2

-5.4967E-02

-1.1512E-03

2.0695E-06

-1.4304E-06

-1.1158E-06

-3.3058E-06

S7

-2.4924E-02

-3.0838E-03

1.1851E-02

-1.8351E-03

-1.1244E-04

-3.0221E-04

S8

3.2212E-02

-4.9401E-02

2.2740E-02

-3.2180E-03

1.7233E-03

-1.0872E-03

S9

-1.1946E-01

-1.3972E-02

3.0036E-03

-1.3095E-03

7.6816E-04

-1.1760E-04

S10

-8.6957E-02

2.1399E-02

-5.2174E-03

2.3331E-03

-1.0413E-03

9.1606E-04

S11

-7.1232E-02

3.0852E-02

-3.4761E-03

2.2663E-03

-1.4153E-03

-1.7564E-04

S12

1.4109E-01

1.7046E-02

2.5437E-02

7.5333E-04

2.5151E-03

-3.5344E-03

S13

-2.1672E+00

1.9487E-01

-4.6942E-02

1.1442E-02

-1.1465E-03

-3.9971E-03

S14

-1.9642E+00

3.6690E-01

-1.5219E-01

6.2233E-02

-2.1577E-02

9.9791E-03

Face number

A16

A18

A20

A22

A24

A26

S1

-4.6099E-06

-4.6218E-06

-2.9145E-06

0.0000E+00

S2

-8.2521E-07

4.0031E-07

1.4099E-06

0.0000E+00

S7

1.6235E-04

-1.0107E-05

-4.8468E-06

0.0000E+00

S8

9.8930E-05

-2.8864E-06

1.7098E-05

0.0000E+00

S9

-1.8099E-04

4.5785E-05

2.4610E-05

0.0000E+00

S10

-4.4640E-04

1.8031E-04

-1.3462E-05

0.0000E+00

S11

2.6173E-04

-4.2101E-05

-4.0411E-05

1.5351E-05

-5.5356E-06

0.0000E+00

S12

-7.7889E-04

-3.4028E-04

1.2497E-04

2.8888E-05

5.6494E-05

0.0000E+00

S13

1.6085E-03

-1.3054E-03

3.7057E-04

1.5227E-04

-1.1740E-04

6.4875E-06

S14

-3.9453E-03

-5.0954E-05

2.8597E-04

-4.4219E-04

4.3807E-04

-9.4812E-05

Table 20

Fig. 23 shows an on-axis chromatic aberration curve of the optical imaging lens of example four, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 24 shows an astigmatism curve of the optical imaging lens of example four in the second state, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 25 shows a distortion curve of the optical imaging lens of example four in the second state, which represents distortion magnitude values corresponding to different angles of view. Fig. 26 shows an astigmatism curve of the optical imaging lens of example four in the third state. Fig. 27 shows a distortion curve of the optical imaging lens of example four in the third state. Fig. 28 shows a magnification chromatic aberration curve of the optical imaging lens of example four, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens.

As can be seen from fig. 23 to 28, the optical imaging lens given in example four can achieve good imaging quality.

Example five

As shown in fig. 29 to 35, an optical imaging lens of example five of the present application is described. Fig. 29 shows a schematic diagram of the structure of an optical imaging lens of example five.

As shown in fig. 29, 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 S17.

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 positive refractive power, wherein an object-side surface S3 of the second lens element is convex, and an image-side surface S6 of the second lens element is planar. The third lens element E3 has positive refractive power, wherein an object-side surface S7 of the third lens element is convex, and an image-side surface S8 of the third lens element is concave. The fourth lens element E4 has negative refractive power, wherein an object-side surface S9 of the fourth lens element is convex, and an image-side surface S10 of the fourth lens element is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S11 of the fifth lens element is concave, and an image-side surface S12 of the fifth lens element is convex. The sixth lens element E6 has negative refractive power, wherein an object-side surface S13 of the fifth lens element is convex, and an image-side surface S14 of the fifth lens element is concave. The filter E7 has an object side S15 of the filter and an image side S16 of the filter. Light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

Table 21 shows a basic structural parameter table of the optical imaging lens of example five in the first state, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Table 21

Table 22 shows a basic structural parameter table of the second lens in the second state of the optical imaging lens of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Table 22

Table 23 shows a basic structural parameter table of the second lens in the third state of the optical imaging lens of example five, in which the units of the radius of curvature, thickness/distance, focal length, and effective radius are all millimeters (mm).

Table 23

Table 24 shows the effective focal lengths of the optical imaging lens and the effective focal length of the second lens in the three states of the optical imaging lens of example five.

Example five	First state	Second state	Third state
				OBJ(mm)	400.00	150.00	1200.00
f(mm)	2.67	2.64	2.68
				f2(mm)	662.02	233.03	2330.29
f4/f	-3.72	-3.76	-3.71
				(f/ft)*100	0.40	1.13	0.12

Table 24

Table 25 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example five, where each of the aspherical surface types can be defined by equation (1) given in example one above.

Table 25

Fig. 30 shows an on-axis chromatic aberration curve of the optical imaging lens of example five, which indicates a convergent focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Fig. 31 shows an astigmatism curve of the optical imaging lens of example five in the second state, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 32 shows a distortion curve of the optical imaging lens of example five in the second state, which represents distortion magnitude values corresponding to different angles of view. Fig. 33 shows an astigmatism curve of the optical imaging lens of example five in the third state. Fig. 34 shows a distortion curve of the optical imaging lens of example five in the third state. Fig. 35 shows a magnification chromatic aberration curve of the optical imaging lens of example five, which represents deviations of different image heights on the imaging plane after light passes through the optical imaging lens.

As can be seen from fig. 30 to 35, the optical imaging lens given in example five can achieve good imaging quality.

In summary, examples one to five satisfy the relationships shown in table 26, respectively.

Condition/example	1	2	3	4	5
						fmax/fmin	1.01	1.01	1.01	1.01	1.01
TTL/∑CT	1.64	1.67	1.62	1.65	1.65
						DT31/DT11	2.27	1.74	1.82	1.83	1.74
F2max/f2min	10.00	10.00	10.00	10.00	10.00
						CT5/CT6	1.99	1.89	2.39	2.34	2.01
ET5/CT5	0.31	0.27	0.22	0.23	0.33
						(R7+R8)/(R7-R8)	2.86	3.30	4.49	3.39	6.35
CT1/CT3	1.75	1.19	1.27	1.09	1.21
						CT4/T45	1.19	0.65	0.76	0.71	0.75
TTL/ImgH	1.38	1.38	1.37	1.37	1.36

Table 26

Table 27 gives the effective focal lengths f1, f3 to f5 and TTL, imgH, semi-FOV, fno for each of the lenses of examples one to six.

Table 27

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

1. The utility model provides an optical imaging lens, its characterized in that has six lens quantity of focal power in the optical imaging lens, includes in order from the thing side of optical imaging lens to the image side of optical imaging lens:

The diaphragm is used for the optical transmission,

A first lens having positive optical power;

The second lens is a liquid lens, the focal power of the second lens is continuously variable, the object side surface of the second lens is a convex surface, and the second lens has positive focal power;

A third lens having optical power;

a fourth lens having negative optical power;

A fifth lens having positive optical power;

a sixth lens having negative optical power;

The maximum focal length f2max of the second lens and the minimum focal length f2min of the second lens satisfy: 5 < |

f2max/f2min∣＜15；

A central thickness CT1 of the first lens on the optical axis of the optical imaging lens and a central thickness CT3 of the third lens on the optical axis satisfy: CT1/CT3 is more than 1.0 and less than 2.0.

2. The optical imaging lens of claim 1, wherein an effective half-caliber DT11 of an object side surface of the first lens and an effective half-caliber DT31 of an object side surface of the third lens satisfy: DT31/DT11 is not less than 1.74.

3. The optical imaging lens according to claim 1, wherein a minimum focal length fmin of the optical imaging lens and a maximum focal length fmax of the optical imaging lens satisfy: fmax/fmin < 1.2.

4. The optical imaging lens of claim 1, wherein a radius of an object side of the second lens is variable, and a radius R3 of the object side of the second lens satisfies: r3 is more than or equal to 88mm.

5. The optical imaging lens of claim 1, wherein a focal length f2 of the second lens satisfies: |f2| >200mm.

6. The optical imaging lens according to claim 1, wherein an air interval T45 of the fourth lens and the fifth lens on an optical axis of the optical imaging lens and a center thickness CT4 of the fourth lens on the optical axis satisfy: CT4/T45 is more than 0 and less than 1.5.

7. 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 is between half a diagonal length ImgH of an effective pixel region on the imaging surface: 1< TTL/ImgH < 1.5.

8. The optical imaging lens of claim 1, wherein half of the maximum field angle Semi-FOV of the optical imaging lens satisfies: the Semi-FOV is more than 45 degrees.

9. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and an effective focal length f4 of the fourth lens satisfy: -7 < f4/f < 0.

10. The optical imaging lens of claim 1, wherein a radius of curvature R8 of an image side surface of the fourth lens and a radius of curvature R7 of an object side surface of the fourth lens satisfy: 1.86 < (R7+R8)/(R7-R8) < 7.49.

11. The optical imaging lens as claimed in 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 and a sum Σct of center thicknesses of all lenses of the optical imaging lens on an optical axis of the optical imaging lens satisfy: 1 < TTL/ΣCT < 2.

12. The optical imaging lens according to claim 1, wherein a center thickness CT5 of the fifth lens on an optical axis of the optical imaging lens and a center thickness CT6 of the sixth lens on the optical axis satisfy: CT5/CT6 is more than 1.8 and less than 3.

13. The optical imaging lens of claim 1, wherein abbe numbers of at least two of the first to fifth lenses are less than 20, and a minimum value Vimin of abbe numbers among all lenses of the optical imaging lens satisfies: 10.0< Vinmin <20.0.

14. The optical imaging lens according to claim 1, wherein the fifth lens satisfies between a center thickness CT5 on an optical axis of the optical imaging lens and an edge thickness ET5 of the fifth lens: ET5/CT5<0.5.