CN211206928U - Optical imaging lens - Google Patents

Abstract

The application discloses an optical imaging lens, which sequentially comprises a first lens, a second lens and at least one subsequent lens from an object side to an image side along an optical axis; the optical imaging lens further comprises a diaphragm, wherein an object side surface of a lens which is located on the image side of the diaphragm and is closest to the diaphragm is provided with a monotonous area, the monotonous area comprises an effective semi-aperture area of the object side surface of the lens, and an inflection point is not arranged in the monotonous area.

Description

Optical imaging lens

Technical Field

The present invention relates to an optical imaging lens, and more particularly, to an optical imaging lens including at least three lenses.

Background

With the continuous progress of science and technology at present, the shooting level of the smart phone is continuously improved, and all large mobile phone manufacturers take the shooting capability as one of the main performance indexes of the mobile phone, so that the requirements on MTF imaging quality, stray light and the like of various lenses are higher and higher. However, when the conventional module lens is used for photographing at different angles with respect to a light source with high illumination, ghost images or stray light may be generated, thereby affecting the imaging quality.

SUMMERY OF THE UTILITY MODEL

An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens, a second lens, and at least one subsequent lens. The optical imaging lens further comprises a diaphragm, wherein the object side surface of the lens which is positioned on the image side of the diaphragm and is closest to the diaphragm is provided with a monotonous area, the monotonous area comprises an effective semi-aperture area of the object side surface of the lens, and an inflection point is not arranged in the monotonous area.

In one embodiment, the monotonic region further comprises an effective half aperture +2mm region.

In one embodiment, the on-axis distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TT L/ImgH ≦ 2.0.

In one embodiment, abbe number V1 of the first lens, abbe number V2 of the second lens and abbe number V3 of the third lens may satisfy: 0.7 < (V2+ V3)/V1 < 1.5.

In one embodiment, the total effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length flash of the lens closest to the imaging plane of the optical imaging lens satisfy: -0.3 < f/(f1+ flash) < 2.1.

In one embodiment, the central thickness CT1 of the first lens on the optical axis and the on-axis distance TT L from the object side surface of the first lens to the imaging surface of the optical imaging lens can satisfy 0.7 < CT1/TT L× 10 < 1.7.

In one embodiment, the at least one subsequent lens may include a third lens, and the effective half aperture DT31 of the object-side surface of the third lens, the effective half aperture DT21 of the object-side surface of the second lens, and the effective half aperture DT22 of the image-side surface of the second lens may satisfy: 0.3 < DT31/(DT21+ DT22) < 1.2.

In one embodiment, the effective half-aperture DT L1 of the object side surface of the lens of the optical imaging lens closest to the imaging surface, the effective half-aperture DT L2 of the image side surface of the lens of the optical imaging lens closest to the imaging surface and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy 1.4 < (DT L1 + DT L2)/ImgH < 1.8.

In one embodiment, the at least one subsequent lens may comprise a third lens, and the stop of the optical imaging lens may be located between the first lens and the second lens.

In one embodiment, the at least one subsequent lens may include a third lens and a fourth lens, and the stop of the optical imaging lens may be located between the first lens and the fourth lens.

In one embodiment, an on-axis distance SAG11 between an intersection point of an object side surface and an optical axis of the first lens and an effective semi-aperture vertex of the object side surface of the first lens and an on-axis distance TT L between the object side surface of the first lens and an imaging surface of the optical imaging lens can satisfy 0.3 < SAG11/TT L× 10 < 1.4.

By controlling the rise trend of the half aperture of the object side surface of the lens which is positioned at the image side of the diaphragm and is closest to the diaphragm, when the position of the diaphragm is changed, the smooth passing of light rays can be ensured, and the light source cannot be deformed.

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 with reference to the attached 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;

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 at least three lenses having optical powers, which are a first lens, a second lens, and at least one subsequent lens. The first lens element, the second lens element and the at least one subsequent lens element are arranged along an optical axis in order from an object side to an image side. Any two adjacent lenses of the optical imaging lens can have a spacing distance.

In an exemplary embodiment, the object-side surface of the lens located on the image side of the diaphragm, which is closest to the diaphragm, has a monotonous region in which the object-side surface of the lens does not have an inflection point. That is, in this monotonic region, the slope of the tangent to the object side surface remains the same sign (positive or negative) from the optical axis to the edge. The monotonic region may include an effective half aperture region and an effective half aperture +2mm region. The effective semi-aperture region is the region on the object side of the lens bounded by the effective semi-aperture vertex. The effective half-aperture +2mm region is a region surrounded by an effective half-aperture vertex and an effective half-aperture +2mm projection point. The projection point of the effective half caliber +2mm can be obtained in such a way that the effective half caliber vertex is 0.2mm away from the optical axis along the direction perpendicular to the optical axis to obtain a point of the effective half caliber +2mm, and the projection point of the effective half caliber +2mm can be obtained by projecting the point of the effective half caliber +2mm onto the object side surface of the lens along the direction parallel to the optical axis. The region of effective half aperture +2mm has the shape of a circular ring on the object side of the lens. The light source device meets the conditions, can ensure that incident light can smoothly pass through when the position of the diaphragm is changed, and can be converged to a better state, thereby avoiding the deformation of the light source.

In an exemplary embodiment, the optical imaging lens according to the application can satisfy TT L/Imgh ≦ 2.0, wherein TT L is the on-axis distance from the object side surface of the first lens to the imaging surface of the optical imaging lens, and Imgh is half of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and satisfy TT L/Imgh ≦ 2.0, the optical imaging lens can be ensured to have a smaller size, and the requirement of more miniaturization of the mobile phone lens can be met, and meanwhile, the optical imaging lens can be ensured to have a large enough image surface to present more detailed information of the shot object.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.7 < (V2+ V3)/V1 < 1.5, wherein V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens. More specifically, V1, V2, and V3 may further satisfy: 0.75 < (V2+ V3)/V1 < 1.48. Satisfy 0.7 < (V2+ V3)/V1 < 1.5, the material of the first three lens of reasonable selection both can eliminate the colour difference of optical imaging lens, avoids appearing purple limit scheduling problem in the in-process of shooing, can practice thrift the cost again betterly.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -0.3 < f/(f1+ flash) < 2.1, where f is the total effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, and flash is the effective focal length of the lens of the optical imaging lens closest to the imaging plane. More specifically, f1 and flash further satisfy: -0.28 < f/(f1+ flash) < 2.05. Satisfies the condition that f/(f1+ flash) is more than-0.3 and less than 2.1, can avoid the concentration of focal power, can effectively reduce the sensitivity of the lens, and can balance the spherical aberration, chromatic aberration, astigmatism and the like of the whole system.

In an exemplary embodiment, the optical imaging lens according to the present application may satisfy 0.7 < CT1/TT L× 10 < 1.7, where CT1 is a central thickness of the first lens on an optical axis and TT L is an on-axis distance from an object side surface of the first lens to an imaging surface of the optical imaging lens, and more particularly, CT1 and TT L may further satisfy 0.72 < CT1/TT L× 10 < 1.68, and satisfy 0.7 < CT1/TT L× 10 < 1.7, and may secure both manufacturability of the first lens and a small size of a front end of the optical imaging lens.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 0.3 < DT31/(DT21+ DT22) < 1.2, where DT31 is the effective half aperture of the object side surface of the third lens, DT21 is the effective half aperture of the object side surface of the second lens, and DT22 is the effective half aperture of the image side surface of the second lens. More specifically, DT31, DT21 and DT22 may further satisfy: 0.34 < DT31/(DT21+ DT22) < 1.17. The requirements of 0.3 < DT31/(DT21+ DT22) < 1.2 are met, so that the overlarge difference of the effective half calibers of the second lens and the third lens can be avoided, and the assembly stability is ensured; and the range of incident light rays can be reasonably limited, light rays with poor edge quality are eliminated, off-axis aberration is reduced, and the resolving power of the optical imaging lens is effectively improved.

In an exemplary embodiment, an optical imaging lens according to the present application may satisfy 1.4 < (DT L1 + DT L2)/ImgH < 1.8, where DT L1 is an effective half aperture of an object side surface of a lens of the optical imaging lens closest to an imaging surface, DT L2 is an effective half aperture of an image side surface of a lens of the optical imaging lens closest to the imaging surface, and ImgH is a half length of a diagonal line of an effective pixel region on the imaging surface of the optical imaging lens, more specifically, DT L1, DT L2, and ImgH further satisfy 1.45 < (DT L1 + DT L2)/gh < 1.78, satisfy 1.4 < (DT L1 + DT L2)/ImgH < 1.8, which may facilitate better matching of a CRA and a chip, and may also avoid a large size of a rear end of a lens barrel due to an excessively large effective half aperture of a last lens, increase a processing difficulty of the optical imaging lens barrel and increase of an assembly process difficulty of the optical imaging lens.

In an exemplary embodiment, an optical imaging lens according to the present application may have a center diaphragm. When the optical imaging lens is composed of three lenses, the diaphragm may be located between the first lens and the second lens. When the optical imaging lens includes at least four lenses, the stop may be located between the first lens and the fourth lens. The diaphragm is centrally arranged, so that the aperture of a lens close to the diaphragm can be ensured to be smaller, and the actual processing and assembly are facilitated; but also can make the trend between the lenses more reasonable and is beneficial to the structural arrangement design.

In an exemplary embodiment, the optical imaging lens according to the present application may satisfy 0.3 < SAG11/TT L× 10 < 1.4, where SAG11 is an on-axis distance between an intersection point of an object-side surface of the first lens and an optical axis and an effective half-aperture vertex of the object-side surface of the first lens, and TT L is an on-axis distance between the object-side surface of the first lens and an imaging surface of the optical imaging lens, more specifically, SAG11 and TT L may further satisfy 0.31 < SAG11/TT L× 10 < 1.35, and satisfy 0.3 < SAG11/TT L× 10/L× < 1.4, which may both effectively alleviate a deflection of incident light rays at the object-side surface of the first lens, reduce a sensitivity of the first lens, and may realize a design of a small-head lens, ensuring a head miniaturization characteristic thereof.

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 have a diaphragm interposed therebetween, for example, between the first lens and the second lens, or between the first lens and the fourth lens. 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 volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens can be reduced, the processability of the optical imaging lens can be improved, and the optical imaging lens is more beneficial to production and processing. By controlling the rise trend of the half aperture of the object side surface of the lens which is positioned at the image side of the diaphragm and is closest to the diaphragm, when the position of the diaphragm is changed, the smooth passing of light rays can be ensured, and the light source cannot be deformed.

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 lens closest to the image plane 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 the object-side surface and the image-side surface of each lens in the optical imaging lens is an aspherical mirror surface. Optionally, the object-side surface and the image-side surface of each lens in the optical imaging lens are both 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 three to seven lenses are exemplified in the embodiments, the optical imaging lens is not limited to include these numbers of 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 filter E4, and an image forming surface S9.

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 concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6. Filter E4 has an object side S7 and an image side S8. The light from the object sequentially passes through the respective surfaces S1 to S8 and is finally imaged on the imaging surface S9.

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 1.65mm, 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 S9 of the optical imaging lens group) is 2.16mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S9 of the optical imaging lens is 1.50 mm.

In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the third lens E3 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 the inverse of radius of curvature R in table 1 above); 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 S6 used in example 1₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈And A₂₀。

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 first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a filter E5, and an image plane S11.

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 concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has negative power, and has a convex object-side surface S7 and a concave image-side surface S8. Filter E5 has an object side S9 and an image side S10. The light from the object sequentially passes through the respective surfaces S1 to S10 and is finally imaged on the imaging surface S11.

In this example, the total effective focal length f of the optical imaging lens is 2.49mm, the total length TT L of the optical imaging lens is 3.45mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S11 of the optical imaging lens is 2.40 mm.

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 filter E6, and an image forming surface S13.

The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave 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 convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

In this example, the total effective focal length f of the optical imaging lens is 1.66mm, the total length TT L of the optical imaging lens is 4.58mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S13 of the optical imaging lens is 2.45 mm.

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

S1

5.3014E-01

-6.4336E-01

8.4584E-01

-8.4357E-01

5.7980E-01

-2.3379E-01

3.9115E-02

S2

7.6113E-01

-1.3120E+00

6.1608E+00

-2.0603E+01

4.1972E+01

-4.0882E+01

1.3552E+01

S3

1.4648E-02

-4.4425E+00

7.6411E+01

-6.3894E+02

2.7318E+03

-5.8458E+03

4.9544E+03

S4

-2.4476E-01

-4.8365E-01

7.3292E+00

-4.0221E+01

1.0958E+02

-1.5808E+02

9.3215E+01

S5

-1.5222E-01

-1.3019E+00

5.7027E+00

-1.5980E+01

2.9234E+01

-3.2170E+01

1.5366E+01

S6

-2.2655E-01

6.0944E-02

8.5343E-01

-2.4556E+00

3.2457E+00

-2.1942E+00

6.0734E-01

S7

2.3829E-01

-1.1294E+00

3.4024E+00

-5.5169E+00

4.9835E+00

-2.3727E+00

4.6128E-01

S8

5.5692E-01

-1.2984E+00

2.1959E+00

-2.2202E+00

1.4107E+00

-5.0344E-01

7.4690E-02

S9

-5.6152E-01

9.9109E-02

4.0186E-01

-5.1045E-01

2.7188E-01

-6.8100E-02

6.5650E-03

S10

-3.1532E-01

2.7774E-01

-1.6431E-01

6.2036E-02

-1.4600E-02

1.9210E-03

-1.1000E-04

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 second lens E2, a third lens E3, a stop STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

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 positive 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 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 concave 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. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

In this example, the total effective focal length f of the optical imaging lens is 7.49mm, the total length TT L of the optical imaging lens is 6.93mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S15 of the optical imaging lens is 3.47 mm.

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

-5.5900E-03

2.7470E-03

-6.7820E-03

7.0470E-03

-4.7400E-03

1.9350E-03

-4.7000E-04

6.0600E-05

-3.0000E-06

S2

4.2740E-03

4.5540E-03

2.2257E-02

-3.6960E-02

2.6930E-02

-1.1890E-02

3.2030E-03

-4.8000E-04

3.0400E-05

S3

1.3422E-02

-3.4800E-03

6.0580E-02

-9.4990E-02

7.9390E-02

-4.1530E-02

1.3507E-02

-2.5200E-03

2.0400E-04

S4

4.2214E-02

-3.9470E-02

9.3834E-02

-1.5588E-01

1.5710E-01

-9.6180E-02

3.4357E-02

-6.5800E-03

5.2400E-04

S5

1.0264E-01

-1.3289E-01

2.0503E-01

-3.1495E-01

3.8615E-01

-3.1484E-01

1.5900E-01

-4.5180E-02

5.5840E-03

S6

8.1392E-02

-6.1070E-02

-1.6719E-01

9.4468E-01

-2.2551E+00

3.1805E+00

-2.6549E+00

1.2111E+00

-2.3169E-01

S7

-5.9900E-02

-4.5780E-02

2.9567E-01

-1.2427E+00

3.0602E+00

-4.5251E+00

3.9448E+00

-1.8680E+00

3.6904E-01

S8

-1.1120E-02

5.2888E-02

-2.7794E-01

8.6555E-01

-1.5535E+00

1.7064E+00

-1.1240E+00

4.0646E-01

-6.1990E-02

S9

-3.9020E-02

1.0460E-03

5.3360E-04

5.0560E-03

-4.5900E-03

1.9010E-03

-4.3000E-04

5.1000E-05

-2.5000E-06

S10

-3.0280E-02

1.8167E-02

-1.5372E-02

8.2080E-03

-2.7200E-03

5.4800E-04

-6.4000E-05

3.6800E-06

-7.0000E-08

S11

-4.8060E-02

4.8277E-02

-2.9820E-02

1.1627E-02

-2.9700E-03

4.9500E-04

-5.1000E-05

3.0300E-06

-7.7000E-08

S12

-4.7350E-02

1.9704E-02

-5.5760E-03

7.7000E-04

1.8600E-05

-2.6000E-05

4.3700E-06

-3.2000E-07

9.6000E-09

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 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 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 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 4.03mm, the total length TT L of the optical imaging lens is 5.45mm, and the half ImgH of the diagonal length of the effective pixel region on the imaging surface S17 of the optical imaging lens is 3.59 mm.

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 on-axis chromatic aberration curves of the optical imaging lens group of embodiment 5, which represent the convergent focus deviations 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 group of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens group 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 group according to embodiment 5, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens assembly of 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
						TTL/ImgH	1.44	1.44	1.87	2.00	1.52
N1	1.54	1.55	1.55	1.55	1.55
						(V2+V3)/V1	1.47	1.36	1.36	1.36	0.78
f/(f1+flast)	0.37	1.72	-0.27	0.59	2.03
						CT1/TTL×10	1.48	1.28	0.73	1.42	1.67
DT31/(DT21+DT22)	1.16	0.78	0.42	0.35	0.45
						(DTL1+DTL2)/ImgH	1.46	1.50	1.48	1.60	1.76
SAG11/TTL×10	0.45	0.32	0.58	1.34	0.92

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 (11)

1. The optical imaging lens comprises a first lens, a second lens and at least one subsequent lens from an object side to an image side along an optical axis in sequence; it is characterized in that the preparation method is characterized in that,

the optical imaging lens further comprises a diaphragm,

the object side surface of the lens located on the image side of the diaphragm and closest to the diaphragm has a monotonous region including an effective half-aperture region of the object side surface of the lens and having no inflection point in the monotonous region.

2. The optical imaging lens of claim 1, characterized in that the monotonic region further comprises an effective half aperture +2mm region.

3. The optical imaging lens according to claim 1, wherein at least one subsequent lens comprises a third lens, and the abbe number V1 of the first lens, the abbe number V2 of the second lens and the abbe number V3 of the third lens satisfy: 0.7 < (V2+ V3)/V1 < 1.5.

4. The optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length flash of the lens closest to the imaging plane of the optical imaging lens satisfy: -0.3 < f/(f1+ flash) < 2.1.

5. The optical imaging lens of claim 1, wherein a center thickness CT1 of the first lens on the optical axis and an on-axis distance TT L from an object side surface of the first lens to an imaging surface of the optical imaging lens satisfy 0.7 < CT1/TT L× 10 < 1.7.

6. The optical imaging lens of claim 1, wherein at least one subsequent lens comprises a third lens, and the effective semi-aperture diameter DT31 of the object-side surface of the third lens, the effective semi-aperture diameter DT21 of the object-side surface of the second lens and the effective semi-aperture diameter DT22 of the image-side surface of the second lens satisfy: 0.3 < DT31/(DT21+ DT22) < 1.2.

7. The optical imaging lens of claim 1, wherein the effective half-aperture ratio DT L1 of the object side surface of the lens closest to the imaging surface of the optical imaging lens, the effective half-aperture ratio DT L2 of the image side surface of the lens closest to the imaging surface of the optical imaging lens and the half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens satisfy 1.4 < (DT L1 + DT L2)/ImgH < 1.8.

8. The optical imaging lens of claim 1, wherein at least one subsequent lens comprises a third lens, the stop being located between the first lens and the second lens.

9. The optical imaging lens of claim 1, wherein at least one subsequent lens comprises a third lens and a fourth lens, and the stop is located between the first lens and the fourth lens.

10. The optical imaging lens of any one of claims 1 to 9, wherein an on-axis distance TT L from an object side surface of the first lens to an imaging surface of the optical imaging lens and a half ImgH of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens satisfy TT L/ImgH ≦ 2.0.

11. The optical imaging lens of any one of claims 1 to 9, wherein an on-axis distance SAG11 from an intersection point of an object-side surface of the first lens and the optical axis to a vertex of an effective half aperture of the object-side surface of the first lens and an on-axis distance TT L from the object-side surface of the first lens to an imaging plane of the optical imaging lens satisfy 0.3 < SAG11/TT L× 10 < 1.4.

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