CN111399183A - Optical imaging lens - Google Patents

Abstract

The application discloses an optical imaging lens, which sequentially comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from an object side to an image side, wherein the distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis, and the half of the diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens satisfy that 9.0mm < f × (TT L/ImgH) < 10mm, and the total effective focal length f of the optical imaging lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy 0.8 < f/< f + f 3/< f 4/< f3 >/5.

Description

Optical imaging lens

Technical Field

The application relates to the field of optical elements, in particular to an optical imaging lens.

Background

With the popularization of electronic products such as mobile phones and tablet computers, users have increasingly high requirements on the characteristics of portability, lightness, thinness and the like of the electronic products such as the mobile phones and the tablet computers. Meanwhile, as the performance of a charge-coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) image sensor is improved and the size thereof is reduced, the corresponding imaging lens also meets the requirement of high imaging quality.

At present, in order to obtain better imaging quality, lenses of electronic products such as mobile phones, tablet computers and the like mostly adopt four-piece, five-piece and six-piece lens structures. However, with the continuous reduction in pixel size and the increasing requirements for imaging performance of photosensitive elements, lens manufacturers have begun designing and manufacturing seven-piece and eight-piece lens structures.

Disclosure of Invention

The application provides an optical imaging lens which comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with focal power, a fourth lens with focal power, a fifth lens with focal power, a sixth lens with positive focal power and a seventh lens with negative focal power in order from an object side to an image side, wherein the total effective focal length f of the optical imaging lens, the distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half of the diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens can satisfy 9.0mm ≦ f × (TT L/ImgH) < 10mm, and the total effective focal length f of the optical imaging lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens can satisfy 0.8 f ≦ f3 ≦ f + 6725 ≦ f3| + 5.

In one embodiment, at least one of the object-side surface of the first lens element and the image-side surface of the seventh lens element is an aspheric surface.

In one embodiment, the total effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens can satisfy 5.0mm < f × tan (Semi-FOV) < 6.0 mm.

In one embodiment, the Abbe number V4 of the fourth lens and the Abbe number V6 of the sixth lens can satisfy 0.5 < 10 × | V4-V6|/V6 < 5.5.

In one embodiment, the abbe number V3 of the third lens and the abbe number V5 of the fifth lens may satisfy: i V3-V5I < 20.

In one embodiment, the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens may satisfy: -2.5 ≦ f2/f6 < -1.0.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens may satisfy: f1/f7 is not less than-1.5 and not more than-1.0.

In one embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens may satisfy: f6/f7 is more than or equal to-2.1 and less than or equal to-1.5.

In one embodiment, the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: 2 < (R3+ R4)/(R3-R4) < 5.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: f/R8 is more than-2.0 and less than or equal to-0.5.

In one embodiment, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: 0 < R10/R9 < 3.0.

In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0.5 < f/| R10| < 2.0.

In one embodiment, the radius of curvature R13 of the object-side surface of the seventh lens and the radius of curvature R14 of the image-side surface of the seventh lens may satisfy: 0 < R14/R13 < 5.0.

In one embodiment, a sum ∑ CT of central thicknesses of the first to seventh lenses on the optical axis and a sum ∑ AT of a distance separating any adjacent two of the first to seventh lenses on the optical axis may satisfy 1.0 ≦ ∑ CT/∑ AT < 2.0.

In one embodiment, a distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and a half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy TT L/ImgH < 1.5.

In another aspect, the present application provides an optical imaging lens including, in order from an object side to an image side along an optical axis, a first lens having positive power, a second lens having negative power, a third lens having power, a fourth lens having power, a fifth lens having power, a sixth lens having positive power, and a seventh lens having negative power, an Abbe number V4 of the fourth lens and an Abbe number V6 of the sixth lens may satisfy 0.5 < 10 × | V4-V6|/V6 < 5.5, and an overall effective focal length f of the optical imaging lens, an effective focal length f3 of the third lens, an effective focal length f4 of the fourth lens, and an effective focal length f5 of the fifth lens may satisfy 0.8 ≦ f/| + 3| f/| f4| + f/f 5| 3.3 ≦.

The optical imaging lens adopts seven lenses, and the focal power, the surface type, the center thickness of each lens, the on-axis distance between each lens and the like of each lens are reasonably distributed, so that the optical imaging lens has at least one beneficial effect of small aberration, miniaturization, good imaging quality and the like.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application; and

fig. 10A to 10D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

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

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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 closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

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

The features, principles, and other aspects of the present application are described in detail below.

An optical imaging lens according to an exemplary embodiment of the present application may include seven lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, respectively. The seven lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the seventh lens may have a spacing distance therebetween.

In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens may have a positive power or a negative power; the fifth lens may have a positive power or a negative power; the sixth lens may have a positive optical power; the seventh lens may have a negative optical power.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 9.0mm ≦ f × (TT L/ImgH) < 10mm, where f is a total effective focal length of the optical imaging lens, TT L is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, more specifically, f, TT L, and ImgH may further satisfy 9.0mm ≦ f × (TT L/ImgH) < 9.7mm, satisfy 9.0mm ≦ f × (TT L/ImgH) < 10mm, and may enable a system to have a large image plane, small structural size while satisfying a dominant value parameter.

In an exemplary embodiment, the optical imaging lens according to the present application may satisfy 0.5 < 10 × | V4-V6|/V6 < 5.5, where V4 is an Abbe number of a fourth lens and V6 is an Abbe number of a sixth lens, and more particularly, V4 and V6 may further satisfy 0.5 < 10 × | V4-V6|/V6 < 5.2, satisfy 0.5 < 10 × | V4-V6|/V6 < 5.5, and may better correct a vertical axis chromatic aberration, an axial chromatic aberration, and a chromatic spherical aberration of a system, thereby better securing an image quality of the system.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 5.0mm < f × tan (Semi-FOV) < 6.0mm, where f is a total effective focal length of the optical imaging lens and the Semi-FOV is a maximum half field angle of the optical imaging lens, and more particularly, f and the Semi-FOV may further satisfy 5.2mm < f × tan (Semi-FOV) < 5.7mm, and satisfy 5.0mm < f × tan (Semi-FOV) < 6.0mm, which may effectively reduce the size of a system, make a light deflection angle small, facilitate realization of a large image plane, and facilitate injection molding.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.8 ≦ f/| f3| + f/| f4| + f/| f5| ≦ 1.3, where f is the total effective focal length of the optical imaging lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. The optical system meets the condition that f/| f3| + f/| f4| + f/| f5| -0.8 is less than or equal to 1.3, can enable the aberration generated by each lens of the system to be mutually offset, and is beneficial to ensuring that the field on the system axis and the field nearby can obtain good imaging quality.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: l V3-V5 l < 20, where V3 is the Abbe number of the third lens and V5 is the Abbe number of the fifth lens. More specifically, V3 and V5 may further satisfy: i V3-V5I < 16. The method meets the condition that the absolute value of V3-V5 is less than 20, and can better correct the vertical axis chromatic aberration, the axial chromatic aberration and the chromatic spherical aberration of the system, thereby better ensuring the image quality of the system.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.5 ≦ f2/f6 < -1.0, where f2 is the effective focal length of the second lens and f6 is the effective focal length of the sixth lens. More specifically, f2 and f6 may further satisfy: -2.5 ≦ f2/f6 < -1.2. Satisfying-2.5 ≤ f2/f6 < -1.0, restricting the spherical aberration generated by the system in a reasonable range, rapidly offsetting and balancing the spherical aberration generated by the second lens and the sixth lens, and obtaining good imaging quality of the on-axis field and the nearby field.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -1.5 ≦ f1/f7 ≦ -1.0, where f1 is the effective focal length of the first lens and f7 is the effective focal length of the seventh lens. Satisfying f1/f7 of-1.5 and f1/f7 and f 1.0, the contribution range of the focal power of the first lens and the seventh lens can be reasonably controlled, and the contribution rate of the negative spherical aberration of the first lens and the seventh lens can be reasonably controlled, which is beneficial to reasonably balancing the positive focal power generated by the lenses.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.1 ≦ f6/f7 ≦ -1.5, where f6 is the effective focal length of the sixth lens and f7 is the effective focal length of the seventh lens. Satisfy-2.1 is less than or equal to f6/f7 is less than or equal to-1.5, the residual error after the positive spherical aberration and the negative spherical aberration generated by the sixth lens and the seventh lens are balanced can be controlled in a smaller reasonable range, which is beneficial to the balance of the residual spherical aberration by the front lens with smaller burden, and further the optical system can easily ensure the image quality of the on-axis view field.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2 < (R3+ R4)/(R3-R4) < 5, wherein R3 is the radius of curvature of the object-side surface of the second lens, and R4 is the radius of curvature of the image-side surface of the second lens. More specifically, R3 and R4 may further satisfy: 2.4 < (R3+ R4)/(R3-R4) < 4.1. Satisfying 2 < (R3+ R4)/(R3-R4) < 5, the contribution of astigmatism of the object side and the image side of the second lens can be effectively controlled, and the image quality of the middle field and the aperture band can be effectively and reasonably controlled.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.0 < f/R8 ≦ 0.5, wherein f is the total effective focal length of the optical imaging lens, and R8 is the radius of curvature of the image-side surface of the fourth lens. More specifically, f and R8 further satisfy: f/R8 is more than-1.5 and less than or equal to-0.5. The contribution amount of the fourth lens to the fifth-order spherical aberration of the system can be well controlled when the f/R8 is more than-2.0 and less than or equal to-0.5, and further the third-order spherical aberration generated by the lens is compensated, so that the system has good imaging quality on the axis.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0 < R10/R9 < 3.0, wherein R9 is the radius of curvature of the object-side surface of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, R10 and R9 may further satisfy: 0.6 < R10/R9 < 2.4. The optical lens meets the requirement that R10/R9 is more than 0 and less than 3.0, the coma contribution rate of the fifth lens can be controlled within a reasonable range, the coma generated by a system member can be well balanced, and good imaging quality is obtained.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.5 < f/| R10| < 2.0, where f is the total effective focal length of the optical imaging lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. More specifically, f and R10 further satisfy: 0.5 < f/| R10| < 1.5. The astigmatism of the system can be effectively corrected, and the image quality of the marginal field of view is further ensured, wherein f/| R10| < 0.5 is less than 2.0.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0 < R14/R13 < 5.0, wherein R13 is a radius of curvature of an object-side surface of the seventh lens, and R14 is a radius of curvature of an image-side surface of the seventh lens. More specifically, R14 and R13 may further satisfy: 0 < R14/R13 < 3.5. The requirement that R14/R13 is more than 0 and less than 5.0 is met, the deflection angle of marginal light rays of the system can be reasonably controlled, and the sensitivity of the system is effectively reduced.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 1.0 ≦ ∑ CT/∑ AT < 2.0, where ∑ CT is a total sum of central thicknesses of first to seventh lenses on an optical axis, and ∑ AT is a total sum of separation distances of any adjacent two lenses of the first to seventh lenses on the optical axis, more specifically, ∑ CT and ∑ AT may further satisfy 1.0 ≦ ∑ CT/∑ AT < 1.9, 1.0 ≦ ∑ CT/∑ AT < 2.0, and may reasonably control distortion of a system to have good performance distortion.

In an exemplary embodiment, the optical imaging lens according to the present application may satisfy TT L/ImgH < 1.5, where TT L is a distance on an optical axis from an object side surface of the first lens to an imaging surface of the optical imaging lens, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, and TT L/ImgH < 1.5 may achieve a system ultra-thin characteristic.

In an exemplary embodiment, an optical imaging lens according to the present application further includes a stop disposed between the first lens and the second lens or the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, seven lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the incident light can be effectively converged, the optical total length of the optical imaging lens is reduced, the processability of the optical imaging lens is improved, and the optical imaging lens is more favorable for production and processing and can be suitable for portable electronic equipment. The optical imaging lens with the configuration can have the characteristics of ultra-large image plane, ultra-thin, large aperture, good imaging quality and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, fifth, sixth, and seventh lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

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

TABLE 1

In the present example, the total effective focal length f of the optical imaging lens is 6.74mm, the total length TT L of the optical imaging lens (i.e., the distance on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 of the optical imaging lens) is 7.50mm, and the maximum field angle FOV of the optical imaging lens is 78.5 °.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the seventh lens E7 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is half the curvature of Table 1 aboveThe inverse of radius R); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S14 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

2.0761E-01

-9.4749E-02

4.3416E-02

-1.5477E-02

4.2923E-03

-6.3381E-04

-2.1216E-04

1.8726E-04

-6.4392E-05

S2

1.0400E-01

-3.6445E-02

1.5937E-02

-4.2819E-03

1.2140E-03

-4.8862E-04

3.0755E-04

-2.1966E-04

8.8925E-05

S3

-1.6897E-01

4.5725E-02

-1.3489E-02

5.4904E-03

-2.3057E-03

9.3088E-04

-3.1960E-04

3.7909E-05

3.7602E-05

S4

-6.4380E-02

1.1923E-02

-2.5967E-03

5.1517E-04

-6.6628E-05

-7.2356E-06

1.6516E-07

1.8019E-05

5.9345E-06

S5

8.3022E-02

-1.2133E-03

3.2020E-03

-2.5725E-03

9.5868E-04

-3.6947E-04

2.2382E-04

-1.1213E-04

3.0959E-05

S6

-8.0385E-02

3.9884E-02

1.3757E-02

-6.2728E-03

-1.8310E-03

1.4586E-03

4.3900E-05

-1.5055E-04

6.8058E-05

S7

-5.4728E-02

4.4179E-02

1.9992E-02

-1.1061E-02

5.1906E-04

2.3753E-04

7.4813E-04

-3.0327E-04

8.9373E-05

S8

4.7482E-04

9.6062E-02

-1.5340E-02

-1.3618E-02

1.6061E-02

-9.9411E-03

4.8351E-03

-1.5771E-03

3.1555E-04

S9

6.8008E-02

2.2651E-01

5.7999E-02

-2.5354E-02

-2.4552E-03

5.4734E-05

1.2139E-02

-6.5705E-03

1.6680E-03

S10

1.3861E-01

3.1299E-01

4.6777E-02

-1.0497E-02

-3.4978E-02

5.0041E-02

-1.9337E-02

4.2972E-03

3.6668E-04

S11

2.4598E-01

4.1655E-01

8.9784E-02

-1.1255E-01

3.7549E-02

1.0882E-02

-2.1234E-02

1.1511E-02

-2.5634E-03

S12

-6.0000E-01

-1.1751E-02

3.5989E-01

2.1226E-03

-2.1916E-02

-4.1099E-02

5.3490E-03

1.3477E-02

-5.6069E-03

S13

-1.8688E+00

-5.7276E-01

1.1865E-01

7.0992E-02

3.3649E-02

8.0532E-04

2.1715E-02

2.0085E-02

2.8098E-03

S14

5.9061E-02

2.1115E-01

-9.6230E-02

-7.9673E-02

1.1798E-01

-1.7274E-02

4.5571E-02

8.0050E-03

6.1170E-03

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, the optical imaging lens includes, in order from an object side to an image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has negative power, and has a convex object-side surface S13 and a concave image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 6.50mm, the total length TT L of the optical imaging lens is 7.40mm, and the maximum field angle FOV of the optical imaging lens is 77.6 °.

Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 3

TABLE 4

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 6.65mm, the total length TT L of the optical imaging lens is 8.00mm, and the maximum field angle FOV of the optical imaging lens is 80.7 °.

Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 5

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.8450E-02

-1.4674E-02

-3.8353E-03

-7.1654E-04

-6.5855E-05

2.3068E-05

1.8948E-05

8.0098E-06

1.7064E-06

S2

-3.6456E-02

4.1449E-03

-2.6695E-03

6.2395E-04

-1.6097E-04

5.0934E-05

-9.0685E-06

2.7154E-06

-1.1373E-06

S3

-2.0489E-02

1.9234E-02

-4.7983E-05

1.2113E-03

6.6156E-05

8.6209E-05

1.1935E-05

5.0652E-06

-2.9485E-07

S4

-3.0631E-02

2.7296E-03

-9.6331E-04

1.3238E-04

1.9683E-05

3.1142E-05

1.7425E-05

9.4002E-06

3.7683E-06

S5

-9.1044E-02

-2.9892E-03

-1.3621E-04

5.1066E-05

1.5027E-05

1.8067E-05

9.2463E-06

1.9910E-06

2.2285E-06

S6

-1.1294E-01

2.0470E-02

3.9015E-04

1.2147E-03

-2.6477E-04

1.8002E-04

-9.3408E-05

-8.2677E-06

4.3085E-06

S7

-1.0040E-01

2.4167E-02

-7.0310E-04

4.0614E-03

3.0848E-04

4.7643E-04

-2.8356E-04

-6.1154E-06

-1.0887E-05

S8

-3.6087E-01

2.1596E-02

5.3321E-03

8.6244E-03

4.0061E-03

2.5295E-03

9.1522E-04

3.0707E-04

4.5767E-05

S9

-1.0790E+00

8.1918E-02

-1.0352E-03

2.9916E-03

-3.8237E-03

1.6915E-03

7.6587E-04

2.2563E-04

-7.1114E-05

S10

-1.3816E+00

2.6733E-01

-7.3896E-03

-9.0924E-03

-9.8681E-03

4.2683E-03

9.9941E-04

3.2343E-04

-9.1916E-05

S11

-9.0375E-01

3.3276E-02

-9.9147E-03

1.5487E-02

5.2938E-03

1.3302E-03

-3.2631E-03

-1.5685E-03

3.3400E-04

S12

-4.6908E-01

1.6247E-01

-9.4056E-02

2.5129E-02

-6.7177E-03

-3.6275E-05

-3.5124E-03

3.5203E-03

-3.3650E-03

S13

1.4038E-01

3.3445E-01

-1.7800E-01

2.1179E-02

3.5797E-02

-2.3251E-02

3.9370E-06

9.0937E-03

-6.0674E-03

S14

1.6597E+00

-5.9683E-01

3.1799E-01

-1.1397E-01

5.7561E-02

-3.1535E-02

1.0753E-02

-4.0166E-03

3.2865E-03

TABLE 6

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 6.58mm, the total length TT L of the optical imaging lens is 8.11mm, and the maximum field angle FOV of the optical imaging lens is 81.5 °.

Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.1713E-02

-9.8792E-03

-5.8870E-03

-2.8606E-03

-1.2163E-03

-4.7862E-04

-1.7377E-04

-5.3251E-05

-1.1284E-05

S2

2.4287E-02

-1.0671E-03

-5.2940E-03

-6.2074E-04

-1.0721E-03

-2.8195E-04

-2.0302E-04

-4.7443E-05

-1.9219E-05

S3

-2.4814E-02

1.2300E-02

-6.4259E-04

9.0020E-04

-4.4983E-05

4.3759E-05

-1.4810E-05

-7.7522E-07

-2.5492E-06

S4

-3.2792E-02

1.7811E-03

-4.8304E-04

7.2846E-05

8.6833E-07

4.2774E-06

-3.4612E-07

4.0854E-07

7.3776E-07

S5

-9.6223E-02

-3.0180E-04

-5.7086E-05

5.3098E-05

3.5740E-06

8.3644E-07

3.0859E-06

-1.1224E-07

5.1388E-09

S6

-1.2577E-01

1.6412E-02

-8.0659E-05

8.0254E-04

-1.7313E-04

5.9224E-05

-2.5569E-05

-7.4269E-06

-1.2436E-07

S7

-1.0037E-01

1.3740E-02

1.0093E-03

3.9560E-03

4.1381E-04

2.6880E-04

-1.7768E-04

-2.7836E-05

-1.4647E-05

S8

-3.2633E-01

1.2205E-02

5.3750E-03

6.2326E-03

3.4571E-03

1.8722E-03

7.2258E-04

2.4690E-04

4.9338E-05

S9

-1.0375E+00

7.1421E-02

-4.9996E-04

-4.5905E-04

-5.1587E-03

-3.3688E-04

-3.1588E-04

-1.5833E-05

-3.2657E-05

S10

-1.3852E+00

2.6329E-01

-1.4888E-03

-2.0603E-03

-1.0516E-02

1.2702E-03

1.8894E-04

7.7124E-04

1.1413E-04

S11

-8.8760E-01

-4.2933E-03

-1.8842E-02

1.9313E-02

8.6045E-03

3.2962E-03

-6.6123E-04

-8.4231E-04

-3.6115E-04

S12

-4.9431E-01

1.8124E-01

-8.9776E-02

2.6731E-02

-7.0584E-04

-2.4065E-03

-2.1214E-03

2.8290E-03

-1.0816E-03

S13

3.8621E-01

3.4110E-01

-2.4109E-01

6.1074E-02

1.9118E-02

-3.4326E-02

1.3552E-02

4.7867E-03

-9.0131E-03

S14

1.7917E+00

-7.1469E-01

3.1505E-01

-1.1069E-01

6.2177E-02

-3.1811E-02

1.0184E-02

-6.0034E-03

2.3614E-03

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8, and an image forming surface S17.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. The sixth lens element E6 has positive power, and has a convex object-side surface S11 and a convex image-side surface S12. The seventh lens element E7 has negative power, and has a concave object-side surface S13 and a convex image-side surface S14. Filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the respective surfaces S1 to S16 and is finally imaged on the imaging surface S17.

In this example, the total effective focal length f of the optical imaging lens is 6.70mm, the total length TT L of the optical imaging lens is 8.26mm, and the maximum field angle FOV of the optical imaging lens is 80.4 °.

Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.

TABLE 9

Watch 10

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

In summary, examples 1 to 5 satisfy the relationships shown in table 11, respectively.

Conditions/examples	1	2	3	4	5
						f×(TTL/ImgH)(mm)	9.01	9.04	9.25	9.28	9.62
10×|V4-V6|/V6	5.03	5.16	0.61	0.84	0.97
						f×tan(Semi-FOV)(mm)	5.50	5.23	5.65	5.66	5.66
f/|f3|+f/|f4|+f/f5|	0.91	0.97	1.03	1.25	0.83
						|V3-V5|	3.09	1.20	15.72	7.07	3.08
f2/f6	-1.45	-1.25	-2.44	-1.51	-1.41
						f1/f7	-1.20	-1.00	-1.45	-1.44	-1.45
f6/f7	-1.81	-1.88	-1.58	-2.05	-1.97
						(R3+R4)/(R3-R4)	3.53	3.25	4.02	2.79	2.45
f/R8	-1.43	-0.52	-0.52	-0.81	-0.90
						R10/R9	0.77	2.35	1.15	0.88	0.68
f/|R10|	0.78	0.61	1.35	1.29	1.40
						R14/R13	1.24	0.13	3.23	3.37	3.37
∑CT/∑AT	1.02	1.84	1.74	1.68	1.64
						TTL/ImgH	1.34	1.39	1.39	1.41	1.44

TABLE 11

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

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having optical power;

a fourth lens having an optical power;

a fifth lens having optical power;

a sixth lens having positive optical power; and

a seventh lens having a negative optical power;

the total effective focal length f of the optical imaging lens, the distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens satisfy that 9.0mm is less than or equal to f × (TT L/ImgH) < 10mm, and

the total effective focal length f of the optical imaging lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: f/| f3| + f/| f4| + f/| f5| -0.8 is less than or equal to 1.3.

2. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the maximum half field angle Semi-FOV of the optical imaging lens satisfy 5.0mm < f × tan (Semi-FOV) < 6.0 mm.

3. The optical imaging lens of claim 1, wherein the abbe number V4 of the fourth lens and the abbe number V6 of the sixth lens satisfy 0.5 < 10 × | V4-V6|/V6 < 5.5.

4. The optical imaging lens of claim 1, wherein abbe number V3 of the third lens and abbe number V5 of the fifth lens satisfy: i V3-V5I < 20.

5. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the effective focal length f6 of the sixth lens satisfy: -2.5 ≦ f2/f6 < -1.0.

6. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the effective focal length f7 of the seventh lens satisfy: f1/f7 is not less than-1.5 and not more than-1.0.

7. The optical imaging lens of claim 1, wherein the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: f6/f7 is more than or equal to-2.1 and less than or equal to-1.5.

8. The optical imaging lens of claim 1, wherein the radius of curvature R3 of the object-side surface of the second lens and the radius of curvature R4 of the image-side surface of the second lens satisfy: 2 < (R3+ R4)/(R3-R4) < 5.

9. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy: f/R8 is more than-2.0 and less than or equal to-0.5.

10. The optical imaging lens assembly, in order from an object side to an image side along an optical axis, comprises:

a first lens having a positive optical power;

a second lens having a negative optical power;

a third lens having optical power;

a fourth lens having an optical power;

a fifth lens having optical power;

a sixth lens having positive optical power; and

a seventh lens having a negative optical power;

the Abbe number V4 of the fourth lens and the Abbe number V6 of the sixth lens meet the conditions that 0.5 is less than 10 ×, V4-V6/V6 is less than 5.5, and

the total effective focal length f of the optical imaging lens, the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens and the effective focal length f5 of the fifth lens satisfy: f/| f3| + f/| f4| + f/| f5| -0.8 is less than or equal to 1.3.

Images