CN216411719U

CN216411719U - High-pixel optical imaging lens

Info

Publication number: CN216411719U
Application number: CN202123178102.7U
Authority: CN
Inventors: 陈龙泉; 高晗
Original assignee: Huizhou Sazhide Optoelectronics Technology Co ltd
Current assignee: Huizhou Sazhide Optoelectronics Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-04-29
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to a high-pixel optical imaging lens, which sequentially comprises the following components from an object side to an image side: the high-pixel optical imaging lens comprises a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and an optical filter, wherein the high-pixel optical imaging lens meets the relation: f2> -14, wherein f2 is the second lens focal length. The high-pixel optical imaging lens adopts a six-lens combination, and through reasonable refractive power collocation, the optical imaging lens has better light convergence capability, and simultaneously has the characteristic of good imaging level, so that the optical imaging lens has higher imaging quality.

Description

High-pixel optical imaging lens

Technical Field

The utility model relates to the technical field of optical imaging lenses, in particular to a high-pixel optical imaging lens.

Background

In recent years, with the increasing sophistication of smart phones, four-piece or five-piece structures are mostly adopted in the conventional common photographic lens, but with the development of technology and the increasing of diversified demands of users, the conventional common photographic lens cannot meet the shooting requirements of the mobile phones under the conditions that the pixel area of a photosensitive device is continuously reduced and the requirements of a system on the imaging quality are continuously improved.

Therefore, a high-pixel optical imaging lens is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, the present invention provides a high-pixel optical imaging lens with high imaging quality and large aperture characteristics.

The utility model discloses a high-pixel optical imaging lens, which sequentially comprises from an object side to an image side:

the first lens element with positive refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region;

a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface;

a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface;

a fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface;

a fifth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; and

a sixth lens element with negative refractive power having a concave object-side surface and a concave image-side surface;

the high-pixel optical imaging lens meets the following relational expression:

f2> -14; where f2 is the second lens focal length.

According to an embodiment of the present invention, the high-pixel optical imaging lens satisfies the following relation:

0< CT3/T34< 14; wherein CT3 is the maximum thickness of the third lens on the optical axis, and T34 is the maximum distance between the third lens and the fourth lens on the optical axis.

2.6< f4/f is less than or equal to 4.2; and

7< f3/f is less than or equal to-3; wherein f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f is the focal length of the imaging lens group.

0.41< EPD/ttl < 0.7; and the EPD is the diameter of a diaphragm opening, and the TTL is the distance from the object side surface of the first lens to the image surface at the paraxial position.

0.09< CT4/TTL < 0.2; wherein, CT4 is the maximum thickness of the fourth lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the image surface at the paraxial position.

-1.6< f1/f6< -1.2; wherein f1 is the focal length of the first lens, and f6 is the focal length of the sixth lens.

1.8< f/EPD < 2; and the EPD is the diameter of a diaphragm opening, and f is the focal length of the imaging lens group.

0.08< (CT2+ CT3)/ImgH < 0.25; wherein, CT2 is the maximum thickness of the second lens on the optical axis, CT3 is the maximum thickness of the third lens on the optical axis, and TTL is the distance from the object side surface of the first lens to the image plane at the paraxial position.

-0.6< (R51+ R52)/(R51-R52) < -0.3; wherein R51 is the fifth lens object side curvature and R52 is the fifth lens image side curvature.

0.2< f3/R32< 0.4; wherein f3 is the focal length of the third lens, and R32 is the curvature of the image side surface of the third lens.

The high-pixel optical imaging lens adopts a six-lens combination, and through reasonable refractive power collocation, the optical imaging lens has better light convergence capability, and simultaneously has the characteristic of good imaging level, so that the optical imaging lens has higher imaging quality.

Drawings

Fig. 1 is a schematic structural diagram of a high-pixel optical imaging lens in embodiment 1.

Fig. 2 is a graph showing astigmatism and distortion of the high-pixel optical imaging lens in example 1.

Fig. 3 is a spherical aberration curve chart of the high-pixel optical imaging lens in embodiment 1.

Fig. 4 is a chromatic aberration graph of the high-pixel optical imaging lens in embodiment 1.

Fig. 5 is a schematic structural diagram of a high-pixel optical imaging lens in embodiment 2.

Fig. 6 is a graph showing astigmatism and distortion of the high-pixel optical imaging lens in embodiment 2.

Fig. 7 is a spherical aberration curve chart of the high-pixel optical imaging lens in embodiment 2.

Fig. 8 is a chromatic aberration graph of the high-pixel optical imaging lens in embodiment 2.

Fig. 9 is a schematic structural diagram of a high-pixel optical imaging lens in embodiment 3.

Fig. 10 is a graph showing astigmatism and distortion of the high-pixel optical imaging lens in example 3.

Fig. 11 is a spherical aberration diagram of the high-pixel optical imaging lens in embodiment 3.

Fig. 12 is a chromatic aberration graph of the high-pixel optical imaging lens in embodiment 3.

Fig. 13 is a schematic structural diagram of a high-pixel optical imaging lens in embodiment 4.

Fig. 14 is a graph showing astigmatism and distortion of the high-pixel optical imaging lens in example 4.

Fig. 15 is a spherical aberration diagram of the high-pixel optical imaging lens in embodiment 4.

Fig. 16 is a chromatic aberration graph of the high-pixel optical imaging lens in embodiment 4.

Fig. 17 is a schematic structural diagram of a high-pixel optical imaging lens in embodiment 5.

Fig. 18 is a graph showing astigmatism and distortion of the high-pixel optical imaging lens in example 5.

Fig. 19 is a spherical aberration diagram of the high-pixel optical imaging lens in embodiment 5.

Fig. 20 is a chromatic aberration graph of the high-pixel optical imaging lens in embodiment 5.

Detailed Description

The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to be limiting, wherein certain elements may be omitted, enlarged or reduced in size, and are not intended to represent the actual dimensions of the product, so as to better illustrate the detailed description of the utility model.

In the description of the present invention, the object side refers to a side of the lens facing the object, a side surface of the lens facing the object is an object side surface, the image side refers to a side of the lens facing the imaging surface, and a side surface of the lens facing the imaging surface is an image side surface.

The object side surface of the lens is convex, namely that any point on the passing surface of the object side surface of the lens is taken as a tangent plane, the surface is always positioned on the right side of the tangent plane, the curvature radius of the surface is positive, otherwise, the object side surface is concave, and the curvature radius of the surface is negative; the image side surface is convex, namely, any point on the passing surface of the image side surface of the lens is taken as a tangent plane, the surface is always positioned on the left side of the tangent plane, the curvature radius is negative, otherwise, the image side surface is concave, and the curvature radius is positive; if the surface has a portion on the left side of the tangent plane and a portion on the right side of the tangent plane when the tangent plane is made at any point on the object-side surface or the image-side surface of the lens, the surface has a curve inflection point, and the judgment of the concave-convex of the object-side surface and the image-side surface at the paraxial region is still applicable.

Further, the aspherical surface curve equation of each lens is expressed as follows:

wherein Z is a distance rise from an origin of the aspheric surface when the aspheric surface is at a position having a height of R along the optical axis direction, and c is a paraxial curvature of the aspheric surface (a curvature radius R is 1/c, which is an inverse of the curvature); k is a conic coefficient; ai is the ith order coefficient of the aspheric surface, and the higher order coefficients applied in the present invention are a4, a6, A8, a10, a12, a14, a16, a18, a 20.

Please refer to fig. 1.

The high-pixel optical imaging lens sequentially comprises the following components from an object side to an image side: the high-pixel optical imaging lens comprises a diaphragm 1, a first lens element 2, a second lens element 3, a third lens element 4, a fourth lens element 5, a fifth lens element 6, a sixth lens element 7 and a filter 8, wherein each lens element has an object-side surface facing an object space and an image-side surface facing an image space, and the high-pixel optical imaging lens further comprises an imaging surface 9 positioned on an image side.

Wherein the first lens element 2 with positive refractive power has a convex object-side surface at paraxial region and a concave image-side surface at paraxial region; the second lens element 3 with negative refractive power has a convex object-side surface and a concave image-side surface; the third lens element 4 with negative refractive power has a concave object-side surface and a convex image-side surface; the fourth lens element 5 with positive refractive power has a concave object-side surface and a convex image-side surface; the fifth lens element 6 with positive refractive power has a convex object-side surface and a convex image-side surface; the sixth lens element 7 with negative refractive power has a concave object-side surface at paraxial region and a concave image-side surface at paraxial region.

In the above structure, the first lens element 2 with positive refractive power has a convex object-side surface at a paraxial region, so as to effectively balance low-order aberration during imaging; the second lens element 3 with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region, thereby eliminating aberration generated by the first lens element 2; the third lens element 4 with negative refractive power and the fourth lens element 5 with positive refractive power cooperate with each other to effectively correct paraxial spherical aberration and reduce peripheral astigmatic field curvature; the fifth lens element 6 with positive refractive power has a convex image-side surface at a paraxial region, which is helpful for keeping the principal point of the optical imaging system away from the image-side end, thereby effectively shortening the overall length of the optical imaging system, facilitating the miniaturization of the system, and correcting off-axis aberration to improve the peripheral imaging quality; the sixth lens element 7 with negative refractive power has a concave image-side surface at a paraxial region, which is helpful for reducing the internal reflection stray light of the sixth lens element 7, thereby improving the imaging quality. The six lenses have a spacing distance between any adjacent lenses, and the lenses are fixed relatively and cannot move.

Wherein the high pixel optical imaging lens satisfies the relation: f2> -14. Wherein f2 is the focal length of the second lens, and satisfies the above relation by controlling f2, so that the high-pixel optical imaging lens has better light convergence capability, and meanwhile, the high-pixel optical imaging lens has the characteristic of good imaging level, and the optical imaging lens has higher imaging quality.

In the present application, the object-side surface and the image-side surface of the first lens element 2, the second lens element 3, the third lens element 4, the fourth lens element 5, the fifth lens element 6 and the sixth lens element 7 are all aspheric structures, and the overall structure of the high-pixel optical imaging lens of the present invention is lighter and thinner and the image is clearer compared to the spherical structure by utilizing the characteristics of the aspheric surfaces such as lightness, thinness and flatness.

When the high-pixel optical imaging lens of the utility model is used for imaging, light enters from the object side of the high-pixel optical imaging lens, sequentially passes through the diaphragm 1, the first lens 2, the second lens 3, the third lens 4, the fourth lens 5, the fifth lens 6, the sixth lens 7 and the optical filter 8, and then is imaged on the imaging surface 9.

Further, the high-pixel optical imaging lens satisfies the relation: 0< CT3/T34< 14. Wherein, CT3 is the maximum thickness of the third lens 3 on the optical axis, T34 is the maximum distance between the third lens 4 and the fourth lens 5 on the optical axis, and the assembly difficulty of the camera lens is effectively reduced by controlling the ratio of CT3/T34 to satisfy the above relation.

Further, the high-pixel optical imaging lens satisfies the relation: 2.6< f4/f is less than or equal to 4.2 and-7 < f3/f is less than or equal to-3. Wherein f3 is the focal length of the third lens element, f4 is the focal length of the fourth lens element, and f is the focal length of the imaging lens assembly, and by controlling the ratio of f4/f and the ratio of f3/f to satisfy the above relations, the focal powers of the third lens element 4, the fourth lens element 5, and the sixth lens element 7 can be effectively prevented from being too large, so that the sensitivity of the high-pixel optical imaging lens is effectively reduced, the imaging quality is improved, and the high-pixel optical imaging lens has a shorter optical length, thereby facilitating the overall miniaturization of the high-pixel optical imaging lens.

Further, the high-pixel optical imaging lens satisfies the relation: 0.41< EPD/ttl < 0.7. The EPD is the diameter of a diaphragm opening, the TTL is the distance from the side face of the first lens object 2 to the image plane at the paraxial position, the integral chromatic aberration of lens imaging can be effectively reduced by controlling the EPD/TTL ratio to meet the relational expression, and the lens imaging is prevented from being purple or red.

Further, the high-pixel optical imaging lens satisfies the relation: 0.09< CT4/TTL < 0.2. Wherein, CT4 is the biggest thickness of fourth lens on the optical axis, and TTL is the distance of first lens thing 2 side at paraxial department to image plane, satisfies above-mentioned relational expression through the ratio of control CT4 TTL, can make the interval between the lens more reasonable to effectively reduce the holistic total length of high pixel optical imaging lens, and then reduce the equipment degree of difficulty of high pixel optical imaging lens, make the equipment flow more smoothly, simple and convenient.

Further, the high-pixel optical imaging lens satisfies the relation: -1.6< f1/f6< -1.2. Wherein f1 is the focal length of the first lens element 2, f6 is the focal length of the sixth lens element 7, and the ratio of f1/f6 is controlled to satisfy the above relation, so that the optical power of the first lens element 2 and the sixth lens element 7 is effectively prevented from being too large, the low sensitivity of the high-pixel optical imaging lens is further reduced, the imaging quality of the lens is improved, and the high-pixel optical imaging lens has a shorter optical length.

Further, the high-pixel optical imaging lens satisfies the relation: 1.8< f/EPD < 2. The EPD is the diameter of the diaphragm opening, the f is the focal length of the imaging lens group, the ratio of the f/EPD is controlled to meet the relational expression, and the imaging effect of the high-pixel optical imaging lens is effectively improved.

Further, the high-pixel optical imaging lens satisfies the relation: 0.08< (CT2+ CT3)/ImgH < 0.25. The CT2 is the maximum thickness of the second lens on the optical axis, the CT3 is the maximum thickness of the third lens on the optical axis, the TTL is the distance from the object side surface of the first lens to the image surface at the paraxial position, and the numerical value of (CT2+ CT3)/ImgH is controlled to meet the relational expression, so that the high-pixel optical imaging lens has the characteristic of a small head, and the overall miniaturization design of the high-pixel optical imaging lens is facilitated.

Further, the high-pixel optical imaging lens satisfies the relation: -0.6< (R51+ R52)/(R51-R52) < -0.3. Wherein, R51 is the curvature of the object side surface of the fifth lens, R52 is the curvature of the image side surface of the fifth lens, and the parasitic light generated by the fifth lens 6 can be effectively reduced by controlling the numerical value of (R51+ R52)/(R51-R52) to satisfy the above relational expression, thereby improving the imaging quality of the high-pixel optical imaging lens.

Still further, the high-pixel optical imaging lens satisfies the relation: 0.2< f3/R32< 0.4. Wherein f3 is the focal length of the third lens, and R32 is the curvature of the image side surface of the third lens. By controlling the ratio of f3/R32 to satisfy the above relation, the optical sensitivity of the third lens element 4 is effectively reduced, and the high-pixel optical imaging lens has better imaging effect.

The high-pixel optical imaging lens of the present invention will be described in detail with reference to the following embodiments and accompanying drawings.

Example 1

Referring to fig. 1 to 4, the high-pixel optical imaging lens in embodiment 1 satisfies tables 1-1, 1-2 and 1-3.

Table 1-1 shows the basic parameters of the high-pixel optical imaging lens of the present embodiment:

tables 1-2 show the aspherical coefficients of the lenses of this example:

tables 1 to 3 are values of the respective conditional expressions in the present embodiment:

example 2

Referring to fig. 5 to 8, the high-pixel optical imaging lens in embodiment 2 satisfies tables 2-1, 2-2 and 2-3.

Table 2-1 shows the basic parameters of the high-pixel optical imaging lens of the present embodiment:

table 2-2 shows aspheric coefficients of the lenses in this embodiment:

tables 2 to 3 are values of the respective conditional expressions in the present embodiment:

example 3

Referring to fig. 9 to 12, the high-pixel optical imaging lens in embodiment 3 satisfies tables 3-1, 3-2 and 3-3.

Table 3-1 shows the basic parameters of the high-pixel optical imaging lens of the present embodiment:

table 3-2 shows aspheric coefficients of the lenses in this embodiment:

tables 3 to 3 are values of the respective conditional expressions in the present embodiment:

example 4

Referring to fig. 13 to 16, the high-pixel optical imaging lens in embodiment 4 satisfies tables 4-1, 4-2 and 4-3.

Table 4-1 shows the basic parameters of the high-pixel optical imaging lens of the present embodiment:

table 4-2 shows aspheric coefficients of the lenses in this embodiment:

tables 4 to 3 are values of the respective conditional expressions in the present embodiment:

example 5

Referring to fig. 17 to 20, the high-pixel optical imaging lens in embodiment 5 satisfies tables 5-1, 5-2 and 5-3.

Table 5-1 shows the basic parameters of the high-pixel optical imaging lens of the present embodiment:

table 5-2 shows the aspherical surface coefficients of the lenses in this example:

tables 5 to 3 are values of the respective conditional expressions in the present embodiment:

to facilitate comparison of the five examples, the following table summarizes the values obtained by the expressions under the corresponding conditions of the examples:

in summary, the high-pixel optical imaging lens of the present invention adopts a six-lens combination, and through reasonable refractive power matching, the optical imaging lens has better light converging capability, and meanwhile, the optical imaging lens has the characteristic of good imaging level, so that the optical imaging lens has higher imaging quality.

In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

While the utility model has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are intended to be included within the spirit and scope of the present invention.

Claims

1. The high-pixel optical imaging lens is characterized by comprising the following components in sequence from an object side to an image side:

wherein the high-pixel optical imaging lens satisfies the following relational expression:

f2> -14; where f2 is the second lens focal length.

2. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

3. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

2.6< f4/f is less than or equal to 4.2; and

4. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

5. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

6. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

7. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

8. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

9. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation:

10. The high-pixel optical imaging lens according to claim 1, wherein the high-pixel optical imaging lens satisfies the following relation: