CN107272161B

CN107272161B - Optical imaging lens

Info

Publication number: CN107272161B
Application number: CN201710705074.9A
Authority: CN
Inventors: 张凯元; 宋博; 胡亚斌
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2022-09-23
Anticipated expiration: 2037-08-17
Also published as: CN113238349A; CN107272161A; CN113238349B

Abstract

The application discloses optical imaging lens, this optical imaging lens includes along optical axis from the thing side to the image side in proper order: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens and the fifth lens both have positive focal power; the second lens, the third lens and the fourth lens all have positive focal power or negative focal power; the object side surface of the first lens and the image side surface of the fifth lens are convex surfaces; the image side surface of the second lens, the object side surface of the sixth lens and the image side surface of the sixth lens are all concave surfaces; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens meet the condition that f/EPD is less than or equal to 1.8.

Description

Optical imaging lens

Technical Field

The present application relates to an optical imaging lens, and more particularly, to an optical imaging lens including six lenses.

Background

With the development of science and technology, portable electronic products are gradually emerging, and portable electronic products with a camera shooting function are more popular, so that the market demand for camera lenses suitable for portable electronic products is gradually increased. As portable electronic products tend to be miniaturized, the total length of the lens is limited, thereby increasing the design difficulty of the lens.

Meanwhile, with the improvement of the performance and the reduction of the size of a common photosensitive element such as a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS), the number of pixels of the photosensitive element is increased and the size of the pixels is reduced, thereby providing higher requirements for the high imaging quality and the miniaturization of a matched optical imaging lens.

The reduction in the size of the picture elements means that the amount of light passing through the lens will be smaller for the same exposure time. However, in a dark environment (e.g., rainy days, dusk, etc.), the lens needs to have a large amount of light to ensure the imaging quality. The f-number Fno (total effective focal length of the lens/entrance pupil diameter of the lens) of the conventional lens is 2.0 or more than 2.0. Although the lens can meet the miniaturization requirement, the imaging quality of the lens cannot be guaranteed under the condition of insufficient light, so that the lens with the f-number Fno of 2.0 or more than 2.0 cannot meet the higher-order imaging requirement.

Disclosure of Invention

The present application provides an optical imaging lens applicable to portable electronic products that may solve, at least, or in part, at least one of the above-mentioned disadvantages of the related art.

In one aspect, an optical imaging lens includes, in order from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens and the fifth lens can both have positive focal power; the second lens, the third lens and the fourth lens all have positive focal power or negative focal power; the object side surface of the first lens and the image side surface of the fifth lens can both be convex surfaces; the image side surface of the second lens, the object side surface of the sixth lens and the image side surface of the sixth lens can be concave surfaces; and the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy f/EPD is less than or equal to 1.8.

In one embodiment, the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens can satisfy 0.7 < f1/f < 1.

In one embodiment, the second lens has a negative power, and the effective focal length f2 and the total effective focal length f of the optical imaging lens satisfy-2.1 < f2/f < -1.7.

In one embodiment, the third lens may have positive power, and the effective focal length f3 and the total effective focal length f of the optical imaging lens may satisfy 0 < f3/| R6| < 2.

In one embodiment, the fourth lens may have a negative power, and the effective focal length f4 and the total effective focal length f of the optical imaging lens may satisfy-0.25 < f/f4 < 0.

In one embodiment, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can satisfy TTL/ImgH ≦ 1.5.

In one embodiment, the first lens and the second lens may be spaced apart by a distance T12 on the optical axis satisfying 0mm < T12 < 0.2 mm.

In one embodiment, the central thickness CT5 of the fifth lens on the optical axis may satisfy 0.6mm < CT5 < 0.8 mm.

In one embodiment, the on-axis distance TTL of the object-side surface of the first lens element to the imaging surface of the optical imaging lens may satisfy TTL < 4.8 mm.

In one embodiment, the image-side surface of the first lens element can be concave, and the total effective focal length f of the optical imaging lens and the radius of curvature R2 of the image-side surface of the second lens element can satisfy 0.2 < f/R2 < 0.7.

In one embodiment, the radius of curvature R5 of the object-side surface of the third lens and the radius of curvature R6 of the image-side surface of the third lens may satisfy-1.1 < (R6+ R5)/(R6-R5) < 3.

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-1.5 < (R10+ R9)/(R10-R9) < 0.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element satisfy-1 < R12/R11 ≦ -0.4.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens can have positive focal power, and the object side surface of the first lens can be a convex surface; the second lens can have negative focal power, and the image side surface of the second lens can be concave; the third lens may have a positive optical power; the fourth lens may have a negative optical power; the fifth lens may have a positive optical power, and at least one of the object-side surface and the image-side surface thereof may be convex; the sixth lens element can have a negative focal power, and both the object-side surface and the image-side surface can be concave; and the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens can satisfy-2.1 < f2/f < -1.7.

In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens can satisfy f/EPD ≦ 1.8.

In one embodiment, the effective focal length f3 of the third lens and the total effective focal length f of the optical imaging lens can satisfy 0 < f3/| R6| < 2.

In one embodiment, the radius of curvature of the object-side surface of the third lens R5 and the radius of curvature of the image-side surface of the third lens R6 may satisfy-1.1 < (R6+ R5)/(R6-R5) < 3.

In one embodiment, the effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens can satisfy-0.25 < f/f4 < 0.

In one embodiment, a central thickness CT5 of the fifth lens on the optical axis may satisfy 0.6mm < CT5 < 0.8 mm.

In one embodiment, the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens can satisfy-1 < R12/R11 ≦ -0.4.

In one embodiment, the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens can meet the condition that TTL/ImgH is less than or equal to 1.5.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the first lens with positive focal power, the object side surface of which can be a convex surface; the image side surface of the second lens can be a concave surface; a third lens having optical power; a fourth lens having a focal power; the image side surface of the fifth lens can be a convex surface; and a sixth lens element with negative optical power, wherein the object-side surface can be concave and the image-side surface can be concave. The central thickness CT5 of the fifth lens on the optical axis can satisfy 0.6mm < CT5 < 0.8 mm.

The system has the advantages that the lenses are multiple (for example, six) 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 system has the advantage of large aperture in the process of increasing the light transmission quantity, and the imaging effect in a dark environment is enhanced while the marginal ray aberration is improved. Meanwhile, the optical imaging lens with the configuration has at least one beneficial effect of being ultrathin, miniaturized, large in aperture, low in sensitivity, small in distortion, high in imaging quality and the like.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic configuration diagram 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 axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, respectively;

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 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 5;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

fig. 12A to 12D 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 6;

fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application;

fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 7;

fig. 15 is a schematic structural view showing an optical imaging lens according to embodiment 8 of the present application;

fig. 16A to 16D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of an optical imaging lens of embodiment 8;

fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application;

fig. 18A to 18D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of an optical imaging lens of example 9, respectively.

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, and the surface of each lens closest to the imaging surface is called the image-side surface.

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 includes, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged along the optical axis in sequence from the object side to the image side.

The first lens may have a positive power, and an effective focal length f1 thereof and a total effective focal length f of the optical imaging lens may satisfy 0.7 < f1/f < 1, and more specifically, f1 and f may further satisfy 0.79 ≦ f1/f ≦ 0.90. By controlling the positive focal power of the first lens within a reasonable range, the first lens can bear the positive focal power required by the system, and the spherical aberration contributed by the first lens is within a reasonable controllable range, so that the subsequent optical lens can reasonably correct the negative spherical aberration contributed by the first positive lens, and the image quality of the field of view on the system axis can be better ensured.

The object-side surface of the first lens element can be convex, and the image-side surface of the first lens element can be concave. The total effective focal length f of the optical imaging lens and the curvature radius R2 of the image side surface of the first lens can satisfy 0.2 < f/R2 < 0.7, and more specifically, f and R2 can further satisfy 0.22 ≦ f/R2 ≦ 0.62. By controlling the curvature radius R2 of the image-side surface of the first lens element, the contribution ratio of the fifth-order spherical aberration of the image-side surface of the first lens element can be controlled to a certain extent, so as to balance the fifth-order spherical aberration generated by the object-side surface of the first lens element, and further control the fifth-order spherical aberration of the first lens element within a reasonable range.

The second lens has positive power or negative power. Alternatively, the second lens may have a negative optical power, and an effective focal length f2 thereof and a total effective focal length f of the optical imaging lens may satisfy-2.1 < f2/f < -1.7, and more specifically, f2 and f may further satisfy-2.06 ≦ f2/f ≦ -1.76. By reasonably controlling the negative focal power of the second lens, the positive spherical aberration generated by the second lens can be effectively restricted in a reasonable interval, so that the positive spherical aberration generated by the second negative lens and the negative spherical aberration generated by the first positive lens are quickly offset and balanced, and the on-axis field of view and the field of view nearby the on-axis field of view have good imaging quality.

The object-side surface of the second lens element can be convex, and the image-side surface can be concave.

The third lens has positive power or negative power. Alternatively, the third lens may have a positive optical power. The effective focal length f3 of the third lens and the curvature radius R6 of the image side surface of the third lens can satisfy 0 < f3/| R6| < 2, and more specifically, f3 and R6 can further satisfy 0.32 ≦ f3/| R6| ≦ 1.88. By controlling the curvature radius R6 of the image-side surface of the third lens element within a reasonable interval, the third-order astigmatism of the third lens element can be controlled within a reasonable range, and the astigmatism generated by the front-end (i.e., each lens between the object side and the third lens element) and rear-end (i.e., each lens between the third lens element and the image side) optical lens elements can be balanced, so that the system has good imaging quality.

The curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens can satisfy that-1.1 < (R6+ R5)/(R6-R5) < 3, more specifically, R5 and R6 can further satisfy that-1.05 is more than or equal to (R6+ R5)/(R6-R5) is more than or equal to 2.74. The curvature radius of the object side surface and the curvature radius of the image side surface of the third lens are reasonably controlled, so that the spherical aberration of a system can be improved, and the imaging quality is improved.

The fourth lens has positive power or negative power. Alternatively, the fourth lens may have a negative power, and an effective focal length f4 thereof and a total effective focal length f of the optical imaging lens may satisfy-0.25 < f/f4 < 0, and more specifically, f4 and f may further satisfy-0.19 ≦ f/f4 ≦ -0.01. Through the selection of proper focal power, the system has good imaging quality and lower sensitivity, so that the system is easy to be injection-molded and can be assembled with higher yield.

The fifth lens element can have positive optical power, and the image-side surface thereof can be convex. The curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens can satisfy the condition that (R10+ R9)/(R10-R9) < 0, more specifically, R9 and R10 further satisfy the condition that (R10+ R9)/(R10-R9) ≦ 0.85 of-1.00 ≦ is satisfied. By reasonably controlling the curvature radius of the object-side surface and the image-side surface of the fifth lens, the incidence angle of the chief ray of each view field of the system on the imaging surface can be reasonably controlled, and the requirement of designing a CRA (chief ray angle) of the optical system is further met.

The center thickness CT5 of the fifth lens on the optical axis satisfies 0.6mm < CT5 < 0.8mm, and more specifically, CT5 further satisfies 0.66mm < CT5 < 0.72 mm. Through the reasonable control of the center thickness of the fifth lens, the distortion of the system can be reasonably regulated, so that the distortion of the system after final balance is in a reasonable interval range.

The sixth lens element can have a negative optical power, and can have a concave object-side surface and a concave image-side surface. The radius of curvature R11 of the object-side surface of the sixth lens element and the radius of curvature R12 of the image-side surface of the sixth lens element may satisfy-1 < R12/R11 ≦ -0.4, and more specifically, R11 and R12 may further satisfy-0.96 ≦ R12/R11 ≦ -0.41. By controlling the curvature radius of the image side surface R12 of the sixth lens element, the projection height of the light on the surface of the sixth lens element can be adjusted, and the aperture of the image side surface of the sixth lens element can be further controlled.

The structural feasibility of the system can be ensured by adjusting the separation distance of the lenses on the optical axis. For example, the first lens and the second lens may be spaced apart by a distance T12 on the optical axis, 0mm < T12 < 0.2mm, and more specifically, T12 may further satisfy 0.03mm ≦ T12 ≦ 0.17 mm.

The total optical length TTL of the optical imaging lens (i.e., the on-axis distance from the center of the object-side surface of the first lens element to the imaging surface of the optical imaging lens) can satisfy TTL < 4.8mm, and more specifically, the TTL can further satisfy 4.69mm ≦ TTL ≦ 4.72 mm. The TTL of the condition formula is less than 4.8mm, and the ultrathin characteristic of the lens is reflected.

The total optical length TTL 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 meet the condition that the TTL/ImgH is less than or equal to 1.5, and more particularly, the TTL and the ImgH can further meet the condition that the TTL/ImgH is less than or equal to 1.39 and less than or equal to 1.40. By controlling the total optical length and the image high ratio of the lens, the total size of the imaging lens can be effectively compressed to realize the ultrathin characteristic and the miniaturization of the optical imaging lens, so that the optical imaging lens can be well suitable for systems with limited sizes, such as portable electronic products and the like.

f/EPD ≦ 1.8 may be satisfied between the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens, and more specifically, f and EPD may further satisfy 1.69 ≦ f/EPD ≦ 1.80. The smaller the f-number Fno of the optical imaging lens (i.e., the total effective focal length f of the lens/the entrance pupil diameter EPD of the lens), the larger the clear aperture of the lens, the more the amount of light entering in the same unit time. The reduction of f-number Fno can promote image plane luminance effectively for the shooting demand when the camera lens can satisfy light is not enough better. The lens is configured to satisfy the conditional expression f/EPD less than or equal to 1.8, and the lens has the advantage of large aperture in the process of increasing the light transmission quantity, so that the imaging effect in a dark environment is enhanced while the marginal light aberration is improved. Meanwhile, the high-grade coma aberration and astigmatism of the imaging system are improved, and the imaging quality of the lens is improved.

In an exemplary embodiment, the optical imaging lens may further be provided with at least one diaphragm to further improve the imaging quality of the lens. Alternatively, a diaphragm may be disposed between the first lens and the second lens. It should be understood by those skilled in the art that the stop may be disposed at any position between the object side and the image side as required, that is, the disposition of the stop should not be limited to between the first lens and the second 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, six lenses as described above. Through reasonable distribution of focal power and optimization selection of high-order aspheric parameters, the optical imaging lens which is suitable for portable electronic products and has ultrathin large aperture and good imaging quality is provided.

In the embodiment of the present application, at least one of the mirror surfaces of each 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.

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

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 imaging side along an optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens element E1 has positive power, the object-side surface S1 is convex, the image-side surface S2 is concave, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The third lens element E3 has positive power, and has a convex object-side surface S5 and a concave image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fourth lens element E4 has negative power, and has a convex object-side surface S7, a concave image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element E5 has positive optical power, and has a concave object-side surface S9, a convex image-side surface S10, and aspheric object-side surface S9 and image-side surface S10 of the fifth lens element E5.

The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 of the sixth lens element E6 are aspheric.

Optionally, the optical imaging lens may further include a filter E7 having 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.

Alternatively, a stop STO for limiting the light beam may be disposed between the first lens E1 and the second lens E2 to improve the imaging quality of the optical imaging lens.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 1, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 1

As can be seen from table 1, the radius of curvature R5 of the object-side surface S5 of the third lens element E3 and the radius of curvature R6 of the image-side surface S6 of the third lens element E3 satisfy (R6+ R5)/(R6-R5) ═ 2.74; a radius of curvature R9 of the object-side surface S9 of the fifth lens E5 and a radius of curvature R10 of the image-side surface S10 of the fifth lens E5 satisfy (R10+ R9)/(R10-R9) — 1.00; the radius of curvature R11 of the object-side surface S11 of the sixth lens E6 and the radius of curvature R12 of the image-side surface S12 of the sixth lens E6 satisfy-0.55 of R12/R11; the first lens E1 and the second lens E2 are separated by a distance T12 on the optical axis of 0.17 mm; the central thickness CT5 of the fifth lens E5 on the optical axis is 0.66 mm.

In the present embodiment, each lens may be an aspheric lens, and each aspheric surface type x is defined by the following 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 the conic coefficient (given in table 1); 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 S12 used in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ And A ₂₀ 。

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-6.2018E-03

3.1471E-02

-1.5064E-01

4.4709E-01

-8.2602E-01

9.5158E-01

-6.6710E-01

2.6011E-01

-4.3453E-02

S2

-2.9334E-02

6.4432E-02

-1.7114E-01

5.1874E-01

-1.1276E+00

1.5356E+00

-1.2652E+00

5.7491E-01

-1.1081E-01

S3

-1.1437E-01

2.2287E-01

2.2559E-01

-2.4271E+00

7.9746E+00

-1.5280E+01

1.7534E+01

-1.1085E+01

2.9603E+00

S4

-9.3994E-02

3.0128E-01

-3.5998E-01

7.8865E-01

-2.3724E+00

5.1571E+00

-6.6205E+00

4.6506E+00

-1.3670E+00

S5

-1.2251E-01

5.8183E-01

-4.2678E+00

1.9749E+01

-5.7543E+01

1.0489E+02

-1.1592E+02

7.0871E+01

-1.8322E+01

S6

-7.7339E-02

-2.6028E-01

1.9124E+00

-7.3594E+00

1.6574E+01

-2.2989E+01

1.9319E+01

-9.0487E+00

1.8188E+00

S7

-1.5343E-01

-4.3882E-02

4.4579E-01

-1.1486E+00

1.6051E+00

-1.4169E+00

8.7180E-01

-3.7411E-01

8.0400E-02

S8

-1.3571E-01

-6.9713E-02

2.8767E-01

-4.0750E-01

2.4270E-01

3.7525E-02

-1.2086E-01

5.5242E-02

-8.3144E-03

S9

-9.4242E-03

-5.5480E-02

-1.4816E-01

4.3966E-01

-5.7599E-01

4.3091E-01

-1.8753E-01

4.4092E-02

-4.3174E-03

S10

9.8297E-02

-2.4382E-01

2.1446E-01

-1.1198E-01

4.5067E-02

-1.4592E-02

3.2933E-03

-4.2858E-04

2.3646E-05

S11

-2.8738E-02

-2.2152E-01

2.5401E-01

-1.2494E-01

3.5091E-02

-6.0510E-03

6.3678E-04

-3.7689E-05

9.6466E-07

S12

-1.3438E-01

6.9307E-02

-2.6737E-02

6.8597E-03

-1.0231E-03

3.0431E-05

1.6302E-05

-2.4643E-06

1.1007E-07

TABLE 2

Table 3 gives the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens (i.e., the distance on the optical axis from the center of the object side surface S1 of the first lens E1 to the imaging surface S15), and half the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens in embodiment 1.

TABLE 3

As can be seen from table 3, f1/f is 0.90 between the effective focal length f1 of the first lens E1 and the total effective focal length f of the optical imaging lens; f 2/f-2.02 is satisfied between the effective focal length f2 of the second lens E2 and the total effective focal length f of the optical imaging lens; f4/f is equal to 0.01 between the total effective focal length f of the optical imaging lens and the effective focal length f4 of the fourth lens E4; the total optical length TTL of the optical imaging lens is 4.69 mm; the total optical length TTL of the optical imaging lens and the half of the diagonal length ImgH of the effective pixel area on the imaging surface S15 of the optical imaging lens satisfy that TTL/ImgH is 1.39.

As can be seen from table 1 and table 3, f/R2 is 0.62 between the total effective focal length f of the optical imaging lens and the radius of curvature R2 of the image side S2 of the first lens E1; f3/| R6| -1.57 is satisfied between the effective focal length f3 of the third lens E3 and the radius of curvature R6 of the image-side surface S6 of the third lens E3.

In embodiment 1, f/EPD of 1.79 is satisfied between the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens.

Fig. 2A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 1, which represent 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 meridional field curvature and 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 the distortion magnitude values in the case of different angles of view. 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 an imaging surface after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens system 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The second lens element E2 has negative power, and has a convex object-side surface S3, a concave image-side surface S4, and both the object-side surface S3 and the image-side surface S4 of the second lens element E2 are aspheric.

The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a concave image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element E5 has positive power, and has a convex object-side surface S9 and a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

The sixth lens element E6 has negative power, and has a concave object-side surface S11, a concave image-side surface S12, and both the object-side surface S11 and the image-side surface S12 of the sixth lens element E6 are aspheric.

Optionally, the optical imaging lens may further include a filter E7 having an object-side surface S13 and an image-side surface S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 5 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 6 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens in embodiment 2.

TABLE 4

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.5128E-03

1.0375E-02

-1.4817E-02

-1.8752E-02

9.2366E-02

-1.5014E-01

1.2369E-01

-5.3214E-02

9.2238E-03

S2

-8.0798E-02

2.2813E-01

-3.5527E-01

2.6513E-01

4.6676E-02

-3.1684E-01

3.0669E-01

-1.3500E-01

2.3604E-02

S3

-1.6177E-01

3.8785E-01

-2.1085E-01

-1.1410E+00

4.0090E+00

-6.5285E+00

6.0714E+00

-3.0810E+00

6.6605E-01

S4

-9.4374E-02

1.7667E-01

7.4134E-01

-5.2303E+00

1.6894E+01

-3.2604E+01

3.8262E+01

-2.5177E+01

7.1684E+00

S5

-7.3021E-02

-1.1940E-01

1.1160E+00

-6.7096E+00

2.2685E+01

-4.6670E+01

5.7403E+01

-3.8917E+01

1.1210E+01

S6

-1.0062E-01

-1.6232E-01

9.4181E-01

-3.4414E+00

7.2742E+00

-9.8883E+00

8.4180E+00

-4.0335E+00

8.3105E-01

S7

-1.9007E-01

9.8035E-02

-2.2234E-01

5.8901E-01

-9.8827E-01

5.4843E-01

3.9398E-01

-5.3643E-01

1.5485E-01

S8

-1.9516E-01

1.8358E-01

-5.1331E-01

1.1398E+00

-1.5116E+00

1.2088E+00

-5.6316E-01

1.3987E-01

-1.4281E-02

S9

-8.6024E-02

4.4738E-02

-2.8325E-01

5.5768E-01

-6.1980E-01

4.3011E-01

-1.8582E-01

4.5481E-02

-4.7438E-03

S10

-6.0167E-02

6.2902E-02

-1.6749E-01

1.9309E-01

-1.1159E-01

3.7176E-02

-7.3988E-03

8.2905E-04

-4.0681E-05

S11

-7.9397E-02

-1.0258E-01

1.4645E-01

-7.3022E-02

1.9951E-02

-3.2797E-03

3.2384E-04

-1.7679E-05

4.0820E-07

S12

-1.0438E-01

4.9213E-02

-1.4879E-02

1.6292E-03

4.5133E-04

-2.1122E-04

3.5702E-05

-2.8058E-06

8.3608E-08

TABLE 5

TABLE 6

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 the distortion magnitude values in the case of different angles of view. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fifth lens element E5 has positive power, and has a convex object-side surface S9, a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 3, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 8 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 9 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens in embodiment 3.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-2.2372E-03

2.2638E-02

-7.3207E-02

1.9978E-01

-3.6713E-01

4.3070E-01

-3.0723E-01

1.2130E-01

-2.0357E-02

S2

3.6965E-12

-2.9760E-20

1.4076E-29

-5.7005E-37

1.1789E-44

-1.3702E-52

9.0613E-61

-3.1859E-69

4.6258E-78

S3

-3.9899E-02

-2.3684E-02

2.2004E-01

-5.1184E-01

6.6567E-01

-4.8261E-01

1.9270E-01

-3.9716E-02

3.3058E-03

S4

-2.1674E-02

-3.6403E-02

5.2145E-01

-2.7470E+00

8.9676E+00

-1.8378E+01

2.2842E+01

-1.5684E+01

4.5360E+00

S5

-4.6849E-02

-1.6596E-01

1.0844E+00

-5.4492E+00

1.5454E+01

-2.6852E+01

2.8043E+01

-1.6179E+01

3.9405E+00

S6

-1.3769E-01

1.3260E-01

-7.9077E-02

-1.0990E+00

3.7335E+00

-6.8124E+00

7.4405E+00

-4.4254E+00

1.0970E+00

S7

-2.8361E-01

3.4021E-01

-4.8603E-01

3.2904E-01

3.3357E-01

-1.8775E+00

2.9932E+00

-2.0380E+00

5.0435E-01

S8

-2.7583E-01

3.5454E-01

-7.7535E-01

1.6278E+00

-2.4210E+00

2.2521E+00

-1.2242E+00

3.5562E-01

-4.2738E-02

S9

-8.7014E-02

7.8686E-02

-3.7956E-01

8.4890E-01

-1.0480E+00

7.6951E-01

-3.4026E-01

8.3902E-02

-8.8145E-03

S10

-1.2811E-01

2.1068E-01

-4.2070E-01

5.3993E-01

-3.9393E-01

1.6896E-01

-4.2561E-02

5.8490E-03

-3.3945E-04

S11

-1.5633E-01

4.4936E-03

8.3838E-02

-5.3358E-02

1.6612E-02

-3.0451E-03

3.3541E-04

-2.0620E-05

5.4491E-07

S12

-1.4681E-01

1.0162E-01

-5.5149E-02

2.1635E-02

-6.0439E-03

1.1490E-03

-1.4017E-04

9.8943E-06

-3.0660E-07

TABLE 8

TABLE 9

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 the distortion magnitude values in the case of different angles of view. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1, a concave image-side surface S2, and both the object-side surface S1 and the image-side surface S2 of the first lens element E1 are aspheric.

The fourth lens element E4 has negative power, and has a concave object-side surface S7, a concave image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 4, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 12 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens in example 4.

Watch 10

TABLE 11

TABLE 12

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 the distortion magnitude values in the case of different angles of view. 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 the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The third lens element E3 has positive power, and has a convex object-side surface S5 and a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8, and the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

The fifth lens element E5 has positive power, and has a concave object-side surface S9, a convex image-side surface S10, and both the object-side surface S9 and the image-side surface S10 of the fifth lens element E5 are aspheric.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 14 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 15 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens in embodiment 5.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.3052E-04

-7.3932E-03

7.3752E-02

-2.6505E-01

5.2539E-01

-6.3062E-01

4.5222E-01

-1.7888E-01

2.9742E-02

S2

-9.8380E-02

3.9997E-01

-9.1438E-01

1.3617E+00

-1.2359E+00

4.6609E-01

2.0912E-01

-2.7512E-01

7.9185E-02

S3

-1.6963E-01

5.3226E-01

-7.4253E-01

-4.4412E-01

4.7578E+00

-1.0661E+01

1.2335E+01

-7.4790E+00

1.8849E+00

S4

-8.8498E-02

2.6101E-01

-5.4720E-02

-1.8327E+00

7.8527E+00

-1.7784E+01

2.4387E+01

-1.9091E+01

6.6270E+00

S5

-9.2971E-02

-7.4478E-02

9.4182E-01

-7.1317E+00

2.8609E+01

-6.8296E+01

9.6284E+01

-7.4215E+01

2.4208E+01

S6

-1.0967E-01

-1.7509E-01

1.1359E+00

-4.5520E+00

1.0631E+01

-1.5661E+01

1.4315E+01

-7.3949E+00

1.6543E+00

S7

-2.2394E-01

1.0070E-01

-3.8667E-01

1.5616E+00

-3.8143E+00

5.1732E+00

-3.8262E+00

1.4709E+00

-2.3759E-01

S8

-2.1033E-01

1.1027E-01

-2.9045E-01

8.7556E-01

-1.5037E+00

1.4842E+00

-8.2164E-01

2.3677E-01

-2.7683E-02

S9

-5.2961E-02

3.3440E-03

-2.9337E-01

8.0200E-01

-1.0610E+00

8.1688E-01

-3.7702E-01

9.6452E-02

-1.0423E-02

S10

-1.2548E-01

2.0830E-01

-4.2143E-01

5.4266E-01

-3.9534E-01

1.6909E-01

-4.2487E-02

5.8303E-03

-3.3818E-04

S11

-1.5745E-01

2.6133E-03

8.6724E-02

-5.4984E-02

1.7064E-02

-3.1099E-03

3.3951E-04

-2.0630E-05

5.3754E-07

S12

-1.5865E-01

1.1543E-01

-6.4941E-02

2.5831E-02

-7.1317E-03

1.3155E-03

-1.5392E-04

1.0361E-05

-3.0615E-07

TABLE 14

Watch 15

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 the distortion magnitude values in the case of different angles of view. 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.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, the optical imaging lens includes, in order from the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The fourth lens element E4 has negative power, and has a concave object-side surface S7, a convex image-side surface S8, and both the object-side surface S7 and the image-side surface S8 of the fourth lens element E4 are aspheric.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 18 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging surface S15 of the optical imaging lens in embodiment 6.

TABLE 16

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.7162E-04

-4.3655E-03

5.3153E-02

-1.9167E-01

3.7214E-01

-4.3617E-01

3.0496E-01

-1.1759E-01

1.8985E-02

S2

-9.3470E-02

3.9236E-01

-1.0142E+00

1.9951E+00

-3.0139E+00

3.2904E+00

-2.3980E+00

1.0282E+00

-1.9396E-01

S3

-1.6533E-01

5.1388E-01

-7.5235E-01

-1.1536E-01

3.4784E+00

-8.1209E+00

9.4782E+00

-5.7552E+00

1.4495E+00

S4

-9.0491E-02

2.8011E-01

-2.3672E-01

-7.5047E-01

4.0019E+00

-9.3432E+00

1.3199E+01

-1.0843E+01

4.0189E+00

S5

-9.1670E-02

-4.7733E-02

5.9891E-01

-5.0309E+00

2.1156E+01

-5.2012E+01

7.4723E+01

-5.8319E+01

1.9192E+01

S6

-1.0753E-01

-1.4497E-01

8.9649E-01

-3.6108E+00

8.3949E+00

-1.2307E+01

1.1224E+01

-5.8011E+00

1.3017E+00

S7

-2.1862E-01

1.1189E-01

-4.4952E-01

1.6998E+00

-4.0028E+00

5.3599E+00

-3.9545E+00

1.5188E+00

-2.4309E-01

S8

-2.0637E-01

1.1557E-01

-3.1317E-01

9.0238E-01

-1.5180E+00

1.4891E+00

-8.2583E-01

2.3983E-01

-2.8440E-02

S9

-5.3842E-02

1.2241E-02

-3.0706E-01

8.0354E-01

-1.0427E+00

7.9247E-01

-3.6112E-01

9.1126E-02

-9.7116E-03

S10

-1.1734E-01

1.8755E-01

-3.7758E-01

4.8157E-01

-3.4483E-01

1.4457E-01

-3.5600E-02

4.7912E-03

-2.7282E-04

S11

-1.5411E-01

-2.0030E-03

8.9531E-02

-5.5964E-02

1.7263E-02

-3.1306E-03

3.3992E-04

-2.0525E-05

5.3098E-07

S12

-1.5261E-01

1.0559E-01

-5.6017E-02

2.1015E-02

-5.4993E-03

9.6483E-04

-1.0772E-04

6.9626E-06

-1.9961E-07

TABLE 17

Watch 18

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents the distortion magnitude values in the case of different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens includes, in order from the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

The third lens element E3 has positive power, and has a convex object-side surface S5, a convex image-side surface S6, and both the object-side surface S5 and the image-side surface S6 of the third lens element E3 are aspheric.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 21 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens in embodiment 7.

Watch 19

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

4.0657E-04

-1.2589E-02

8.9430E-02

-2.9210E-01

5.5053E-01

-6.3938E-01

4.4786E-01

-1.7402E-01

2.8531E-02

S2

-9.6389E-02

3.9074E-01

-8.9604E-01

1.3437E+00

-1.2282E+00

4.6501E-01

2.1263E-01

-2.7965E-01

8.0678E-02

S3

-1.6962E-01

5.3935E-01

-8.3008E-01

1.3253E-02

3.4487E+00

-8.4352E+00

1.0096E+01

-6.2503E+00

1.6011E+00

S4

-9.0003E-02

2.6729E-01

-6.7959E-02

-1.8274E+00

7.9094E+00

-1.7873E+01

2.4274E+01

-1.8741E+01

6.4064E+00

S5

-9.1496E-02

-9.0206E-02

1.0147E+00

-7.2476E+00

2.8319E+01

-6.6557E+01

9.2879E+01

-7.1099E+01

2.3080E+01

S6

-1.1343E-01

-1.2355E-01

7.9419E-01

-3.2057E+00

7.3541E+00

-1.0666E+01

9.6781E+00

-5.0021E+00

1.1285E+00

S7

-2.2606E-01

1.2239E-01

-4.9908E-01

1.9051E+00

-4.4708E+00

5.9750E+00

-4.4389E+00

1.7377E+00

-2.8790E-01

S8

-2.1173E-01

1.2033E-01

-3.1758E-01

9.1787E-01

-1.5389E+00

1.4941E+00

-8.1649E-01

2.3262E-01

-2.6901E-02

S9

-5.6048E-02

1.5845E-02

-3.1808E-01

8.3488E-01

-1.0880E+00

8.2906E-01

-3.7901E-01

9.6085E-02

-1.0298E-02

S10

-1.2485E-01

2.0638E-01

-4.1609E-01

5.3415E-01

-3.8804E-01

1.6554E-01

-4.1503E-02

5.6850E-03

-3.2927E-04

S11

-1.5715E-01

2.1407E-03

8.7017E-02

-5.5066E-02

1.7066E-02

-3.1053E-03

3.3834E-04

-2.0510E-05

5.3300E-07

S12

-1.5745E-01

1.1302E-01

-6.2577E-02

2.4509E-02

-6.6724E-03

1.2148E-03

-1.4045E-04

9.3591E-06

-2.7447E-07

Watch 20

TABLE 21

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents the distortion magnitude values in the case of different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

Example 8

An optical imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic structural diagram of an optical imaging lens according to embodiment 8 of the present application.

As shown in fig. 15, the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 8, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 23 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 8, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 24 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens in embodiment 8.

TABLE 22

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-4.2273E-04

-7.2302E-03

7.1161E-02

-2.5774E-01

5.1654E-01

-6.2892E-01

4.5743E-01

-1.8334E-01

3.0835E-02

S2

-9.9919E-02

4.0223E-01

-9.2213E-01

1.3911E+00

-1.3076E+00

5.6996E-01

1.1890E-01

-2.3124E-01

6.9960E-02

S3

-1.7306E-01

5.4868E-01

-8.0064E-01

-2.4247E-01

4.2695E+00

-9.9362E+00

1.1717E+01

-7.2084E+00

1.8403E+00

S4

-8.9457E-02

2.5337E-01

9.9941E-02

-2.7156E+00

1.0612E+01

-2.2897E+01

2.9884E+01

-2.2184E+01

7.2924E+00

S5

-9.4630E-02

-5.2614E-02

7.2128E-01

-5.8652E+00

2.4258E+01

-5.9138E+01

8.4696E+01

-6.6140E+01

2.1816E+01

S6

-1.1113E-01

-1.6505E-01

1.0981E+00

-4.4051E+00

1.0232E+01

-1.5000E+01

1.3687E+01

-7.0949E+00

1.6030E+00

S7

-2.3000E-01

1.3792E-01

-5.1487E-01

1.9042E+00

-4.4388E+00

5.9233E+00

-4.3904E+00

1.7015E+00

-2.7480E-01

S8

-2.1879E-01

1.4613E-01

-3.7491E-01

1.0277E+00

-1.7006E+00

1.6593E+00

-9.2243E-01

2.6981E-01

-3.2279E-02

S9

-5.9877E-02

1.0460E-02

-2.7767E-01

7.4308E-01

-9.7618E-01

7.4769E-01

-3.4390E-01

8.7856E-02

-9.4937E-03

S10

-1.3239E-01

2.1441E-01

-4.1652E-01

5.2809E-01

-3.8273E-01

1.6336E-01

-4.0999E-02

5.6202E-03

-3.2560E-04

S11

-1.6814E-01

2.0964E-02

7.2970E-02

-4.9102E-02

1.5484E-02

-2.8348E-03

3.0910E-04

-1.8673E-05

4.8154E-07

S12

-1.5922E-01

1.1603E-01

-6.5021E-02

2.5806E-02

-7.1475E-03

1.3313E-03

-1.5826E-04

1.0873E-05

-3.2859E-07

TABLE 23

Watch 24

Fig. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 8, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 16B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 8. Fig. 16C shows a distortion curve of the optical imaging lens of embodiment 8, which represents the distortion magnitude values in the case of different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 16A to 16D, the optical imaging lens according to embodiment 8 can achieve good imaging quality.

Example 9

An optical imaging lens according to embodiment 9 of the present application is described below with reference to fig. 17 to 18D. Fig. 17 is a schematic structural view showing an optical imaging lens according to embodiment 9 of the present application.

As shown in fig. 17, the optical imaging lens includes, in order from the object side to the imaging side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and an imaging surface S15. The optical imaging lens may further include a photosensitive element disposed on the imaging surface S15.

Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 9, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 26 shows high-order term coefficients that can be used for each aspherical mirror surface in example 9, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 27 shows the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL of the optical imaging lens, and half ImgH of the diagonal length of the effective pixel area on the imaging plane S15 of the optical imaging lens in example 9.

TABLE 25

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.9682E-04

-4.9632E-03

5.8681E-02

-2.2104E-01

4.4967E-01

-5.5464E-01

4.0796E-01

-1.6531E-01

2.8067E-02

S2

-1.0280E-01

3.9937E-01

-8.9686E-01

1.3334E+00

-1.2484E+00

5.5786E-01

8.5541E-02

-1.9999E-01

6.1218E-02

S3

-1.7524E-01

5.4991E-01

-8.1367E-01

-4.7077E-02

3.4596E+00

-8.2326E+00

9.7238E+00

-5.9727E+00

1.5233E+00

S4

-8.9309E-02

2.5518E-01

5.9413E-02

-2.3418E+00

8.9686E+00

-1.8849E+01

2.4151E+01

-1.7818E+01

5.8995E+00

S5

-9.6488E-02

-3.3644E-02

5.7700E-01

-5.2433E+00

2.2608E+01

-5.6410E+01

8.1941E+01

-6.4560E+01

2.1408E+01

S6

-1.0716E-01

-2.0821E-01

1.3791E+00

-5.5279E+00

1.2977E+01

-1.9193E+01

1.7595E+01

-9.1288E+00

2.0553E+00

S7

-2.2461E-01

1.0500E-01

-3.4855E-01

1.3848E+00

-3.4560E+00

4.7521E+00

-3.5100E+00

1.3151E+00

-1.9991E-01

S8

-2.1780E-01

1.3634E-01

-3.3216E-01

9.4166E-01

-1.6145E+00

1.6248E+00

-9.2740E-01

2.7756E-01

-3.3890E-02

S9

-6.3400E-02

9.4292E-03

-2.7775E-01

7.7644E-01

-1.0527E+00

8.2778E-01

-3.8948E-01

1.0139E-01

-1.1125E-02

S10

-1.4931E-01

2.4322E-01

-4.5315E-01

5.7216E-01

-4.1812E-01

1.8003E-01

-4.5491E-02

6.2660E-03

-3.6425E-04

S11

-1.9266E-01

6.3259E-02

4.0951E-02

-3.5229E-02

1.1734E-02

-2.1881E-03

2.3960E-04

-1.4417E-05

3.6770E-07

S12

-1.6418E-01

1.2517E-01

-7.2438E-02

2.9352E-02

-8.2509E-03

1.5562E-03

-1.8708E-04

1.2970E-05

-3.9457E-07

Watch 26

Watch 27

Fig. 18A shows on-axis chromatic aberration curves of an optical imaging lens of embodiment 9, which represent deviation of convergence focuses of light rays of different wavelengths after passing through the lens. Fig. 18B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 9. Fig. 18C shows a distortion curve of the optical imaging lens of embodiment 9, which represents the distortion magnitude values in the case of different angles of view. Fig. 18D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 9, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 18A to 18D, the optical imaging lens according to embodiment 9 can achieve good imaging quality.

In summary, examples 1 to 9 each satisfy the relationship shown in table 28 below.

Conditional expression (A) example	1	2	3	4	5	6	7	8	9
										f/EPD	1.79	1.69	1.79	1.78	1.80	1.79	1.78	1.80	1.79
TTL/ImgH	1.39	1.40	1.40	1.40	1.40	1.40	1.40	1.40	1.40
										f/f4	-0.01	-0.18	-0.19	-0.16	-0.14	-0.15	-0.14	-0.15	-0.15
f1/f	0.90	0.82	0.81	0.79	0.81	0.81	0.81	0.80	0.81
										f2/f	-2.02	-1.94	-2.06	-1.80	-1.77	-1.77	-1.78	-1.76	-1.82
T12(mm)	0.17	0.07	0.03	0.03	0.05	0.05	0.05	0.05	0.05
										CT5(mm)	0.66	0.72	0.68	0.66	0.66	0.66	0.66	0.67	0.68
f/R2	0.62	0.35	0.29	0.22	0.30	0.30	0.30	0.30	0.33
										f3/\|R6\|	1.57	1.40	1.88	1.85	0.62	0.73	0.64	0.50	0.32
(R10+R9)/(R10-R9)	-1.00	-0.88	-0.85	-0.92	-1.00	-1.00	-1.00	-0.99	-0.99
										R12/R11	-0.55	-0.96	-0.45	-0.50	-0.47	-0.47	-0.47	-0.44	-0.41
(R6+R5)/(R6-R5)	2.74	2.52	-1.05	-1.02	0.33	0.21	0.30	0.45	0.65
										TTL(mm)	4.69	4.72	4.69	4.69	4.69	4.70	4.69	4.69	4.69

Watch 28

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 apparatus such as a digital camera, or may be an imaging module integrated on a mobile electronic apparatus such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The foregoing description is only exemplary of the preferred embodiments 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

1. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the number of lenses having a power in the optical imaging lens being six,

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

the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;

the third lens has positive optical power;

the fourth lens has a negative optical power;

the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface;

the sixth lens has negative focal power, and both the object-side surface and the image-side surface of the sixth lens are concave surfaces;

the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy f/EPD is less than or equal to 1.8, an

The effective focal length f4 of the fourth lens and the total effective focal length f of the optical imaging lens meet-0.25 < f/f4 < 0.

2. The optical imaging lens of claim 1, wherein the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens satisfy 0.7 < f1/f < 1.

3. The optical imaging lens of claim 1, wherein the effective focal length f2 of the second lens and the total effective focal length f of the optical imaging lens satisfy-2.1 < f2/f < -1.7.

4. The optical imaging lens of claim 1, wherein the effective focal length f3 of the third lens and the total effective focal length f of the optical imaging lens satisfy 0 < f3/| R6| < 2.

5. The optical imaging lens of any one of claims 1 to 4, wherein an on-axis distance TTL from the object side surface of the first lens to the 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 TTL/ImgH ≦ 1.5.

6. The optical imaging lens according to claim 5, wherein a separation distance T12 between the first lens and the second lens on the optical axis satisfies 0mm < T12 < 0.2 mm.

7. The optical imaging lens of claim 5, wherein a central thickness CT5 of the fifth lens on an optical axis satisfies 0.6mm < CT5 < 0.8 mm.

8. The optical imaging lens of claim 5, wherein TTL satisfies TTL < 4.8 mm.

9. An optical imaging lens according to any one of claims 1, 2, 6 and 8, characterized in that the total effective focal length f of the optical imaging lens and the radius of curvature R2 of the image side surface of the second lens satisfy 0.2 < f/R2 < 0.7.

10. An optical imaging lens according to any one of claims 1, 4 and 8, characterized in that a radius of curvature R5 of the object-side surface of the third lens and a radius of curvature R6 of the image-side surface of the third lens satisfy-1.1 < (R6+ R5)/(R6-R5) < 3.

11. An optical imaging lens according to any one of claims 1, 7 and 8, characterized in that a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy-1.5 < (R10+ R9)/(R10-R9) < 0.

12. The optical imaging lens of claim 1 or 8, characterized in that the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R12 of the image-side surface of the sixth lens satisfy-1 < R12/R11 ≦ -0.4.