Optical imaging lens

Abstract

The present application discloses an optical imaging lens, wherein the optical imaging lens comprises, in order from the object side to the image side along the optical axis, a first lens having optical focal power; a second lens having optical focal power; a third lens having optical focal power, whose image side surface is a concave surface; a fourth lens having optical focal power; a fifth lens having optical focal power; a sixth lens having optical focal power; and a seventh lens having optical focal power; wherein the total effective focal length f of the optical imaging lens satisfies the following conditions: f / EPD<1.5; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis satisfies the following conditions: TTL / f≤1.1; and the spacing distance T12 between the first lens and the second lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfies the following conditions: 0.5 <T12 / CT2<1.0。

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical imaging lens. Background Art

[0002] In recent years, with the rapid development of portable electronic products such as mobile phones and tablets, their shooting functions have become more and more popular. At the same time, on the one hand, as electronic products continue to become lighter and thinner, the market requires the built-in optical imaging lenses to be continuously miniaturized; on the other hand, with the popularization of large-size, high-pixel CMOS chips, portable electronic products with camera functions have put forward higher requirements on the imaging quality of the matching optical imaging lenses. Among the types of high-quality imaging lenses currently available, telephoto lenses and large-aperture, wide-angle lenses are widely favored by consumers and electronic product manufacturers. However, optical imaging lenses with both telephoto and wide-angle characteristics are more favored by consumers and electronic product manufacturers. Summary of the invention

[0003] In one aspect, the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens having optical power; a second lens having optical power; a third lens having optical power, whose image side surface is a concave surface; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; and a seventh lens having optical power; wherein the total effective focal length f of the optical imaging lens satisfies the following relationship with the entrance pupil diameter EPD of the optical imaging lens: f / EPD<1.5; the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy the following relationship: TTL / f≤1.1; and the spacing distance T12 between the first lens and the second lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy the following relationship: 0.5 <T12 / CT2<1.0。

[0004] 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 f2 of the second lens satisfy the following conditions: 1.5 <f1 / f-f2 / f<2.5。

[0005] In one embodiment, the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: 0.3<(f6-f7) / (f3+f4)<1.0.

[0006] In one embodiment, the distance SD from the aperture in the optical imaging lens to the image side surface of the seventh lens on the optical axis and the combined focal length f123 of the first lens, the second lens and the third lens satisfy: 0.3 <SD / f123<0.8。

[0007] In one embodiment, the edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 0.2 <ET1 / CT1<0.7。

[0008] In one embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET7 of the seventh lens satisfy: 0.3 <ET2 / (ET3+ET7)<0.8。

[0009] In one embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the sum of the distances between any two adjacent lenses from the first lens to the seventh lens on the optical axis ΣAT satisfy: 0.5 <DT11 / ΣAT<1.0。

[0010] In one embodiment, the on-axis distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens, the on-axis distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the effective radius vertex of the image side surface of the second lens, and the on-axis distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens satisfy: 0.2 <SAG22 / (SAG11+SAG32)<0.7。

[0011] In one embodiment, the on-axis distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the effective radius vertex of the image side surface of the sixth lens and the on-axis distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the effective radius vertex of the object side surface of the seventh lens satisfy: 0.7 <SAG62 / SAG71<1.2。

[0012] In one embodiment, a curvature radius R5 of the object side surface of the third lens, a curvature radius R6 of the image side surface of the third lens, a curvature radius R3 of the object side surface of the second lens, and a curvature radius R4 of the image side surface of the second lens satisfy: 0.5<(R5+R6) / (R3+R4)<1.0.

[0013] In one embodiment, a curvature radius R7 of the object side surface of the fourth lens, a curvature radius R8 of the image side surface of the fourth lens, and a curvature radius R10 of the image side surface of the fifth lens satisfy: 0.2<(R7+R8) / R10<0.7.

[0014] In one embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens satisfy: 0.5 <R11 / (R11+R14)<1.0。

[0015] In one embodiment, a center thickness CT2 of the second lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT5 of the fifth lens on the optical axis, a center thickness CT7 of the seventh lens on the optical axis, a center thickness CT3 of the third lens on the optical axis, and a center thickness CT6 of the sixth lens on the optical axis satisfy: 0.5<(CT2+CT4+CT5+CT7) / (CT3+CT6)<1.0.

[0016] In one embodiment, the first lens has positive optical power, and its object-side surface is convex.

[0017] In one embodiment, the second lens has negative optical power, and its object-side surface is convex and its image-side surface is concave.

[0018] In one embodiment, the fourth lens has positive refractive power, and its object-side surface is convex and its image-side surface is concave.

[0019] In one embodiment, the image-side surface of the fifth lens is concave.

[0020] In one embodiment, the sixth lens has positive refractive power, and its object-side surface is convex.

[0021] Another aspect of the present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power, whose object side surface is convex; a second lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a third lens with optical power, whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens with optical power, whose image side surface is concave; a sixth lens with positive optical power, whose object side surface is convex; and a seventh lens with optical power; wherein 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<1.5.

[0022] The optical imaging lens provided by the present application includes multiple lenses, such as the first lens to the seventh lens. By reasonably setting the ratio between the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens; the ratio between the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length of the optical imaging lens; and the ratio between the spacing between the first lens and the second lens on the optical axis and the center thickness of the second lens on the optical axis, and optimizing the focal length and surface shape of each lens, and reasonably matching each other, the optical imaging lens can be miniaturized, lightweight, and have large aperture and telephoto characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0025] FIG. 2A to FIG. 2D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0026] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0027] FIG. 4A to FIG. 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0028] Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0029] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0030] Figure 7 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0031] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0032] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0033] FIG. 10A to FIG. 10DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0034] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0035] FIG. 12A to FIG. 12D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0036] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0038] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0039] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface 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 of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0040] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0041] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] The features, principles and other aspects of the present application are described in detail below.

[0044] The optical imaging lens according to the exemplary embodiment of the present application may include seven lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The seven lenses are arranged in sequence from the object side to the image side along the optical axis. There may be air gaps between each adjacent lens.

[0045] In one embodiment, the first lens may have a positive focal power, and the second lens may have a negative focal power. Reasonable setting of the focal powers of the first lens and the second lens is beneficial to reasonably controlling the field angle of the telephoto optical system, reducing the incident angle of the light at the aperture position, reducing the pupil aberration, and improving the imaging quality of the optical system. The image side surface of the third lens with focal power is a concave surface, which is beneficial to reducing the spherical aberration and astigmatism of the optical system and improving the imaging quality of the optical system. The fourth lens may have a positive focal power, the fifth lens may have a positive focal power or a negative focal power, the sixth lens may have a positive focal power, and the seventh lens may have a negative focal power. Reasonable setting of the focal powers of the fourth to seventh lenses is beneficial to reasonably controlling the deflection angle of the light, reducing the processing sensitivity of the optical system, and improving the relative illumination and imaging quality of the optical system.

[0046] In one embodiment, the object-side surface of the first lens is convex.

[0047] In one embodiment, the object side of the second lens is convex and the image side is concave.

[0048] In one embodiment, the object side of the fourth lens is convex and the image side is concave.

[0049] In one embodiment, the image side of the fifth lens is concave.

[0050] In one embodiment, the object side of the sixth lens is convex. Reasonably setting the convex and concave characteristics of the lens surfaces in the above optical system is beneficial to reducing the incident angle of light at the aperture position, reducing the pupil aberration, and improving the relative illumination and imaging quality of the optical system.

[0051] 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 satisfy: f / EPD < 1.5. For example, 1.3 < f / EPD < 1.5. Reasonably setting the ratio relationship between the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens is beneficial for the optical system to have sufficient light input, preventing local image blurring of the optical system imaging due to insufficient light when shooting in a dark environment.

[0052] In one embodiment, the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens satisfy: TTL / f ≤ 1.1. For example, 1.0 ≤ TTL / f ≤ 1.1. Reasonably setting the ratio relationship between the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the total effective focal length of the optical imaging lens is beneficial for the optical system to have both large aperture and long focal length characteristics.

[0053] In one embodiment, the spacing distance T12 between the first lens and the second lens on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 0.5 < T12 / CT2 < 1.0. Reasonably setting the ratio relationship between the spacing distance between the first lens and the second lens on the optical axis and the central thickness of the second lens on the optical axis is beneficial to reducing the chromatic dispersion of the optical system and the focus shift affected by the lens spacing.

[0054] 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 f2 of the second lens satisfy: 1.5 < f1 / f - f2 / f < 2.5. For example, 1.5 < f1 / f - f2 / f < 2.0. Reasonably setting the mutual relationship between the total effective focal length of the optical imaging lens, the effective focal length of the first lens, and the effective focal length of the second lens to satisfy the above conditions is beneficial for reasonable distribution of the optical power, thereby balancing the axial spherical aberration and chromatic spherical aberration of the optical system and improving the imaging quality of the optical system.

[0055] In one embodiment, the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: 0.3 < (f6 - f7) / (f3 + f4) < 1.0. For example, 0.4 < (f6 - f7) / (f3 + f4) < 0.7. Reasonably setting the mutual relationship among the effective focal length of the sixth lens, the effective focal length of the seventh lens, the effective focal length of the third lens, and the effective focal length of the fourth lens to satisfy the above conditions is beneficial to controlling the spherical aberration contribution of the above lenses within a reasonable level range, so as to obtain good imaging quality for the on-axis field of view of the optical system.

[0056] In one embodiment, the distance SD on the optical axis from the aperture stop in the optical imaging lens to the image side of the seventh lens and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy: 0.3 < SD / f123 < 0.8. For example, 0.4 < SD / f123 < 0.6. Setting the ratio of the distance on the optical axis from the aperture stop in the optical imaging lens to the image side of the seventh lens to the combined focal length of the first lens, the second lens, and the third lens within a reasonable numerical range is beneficial to reducing the deflection angle of the light rays, thereby reducing the sensitivity of the optical system.

[0057] In one embodiment, the edge thickness ET1 of the first lens and the central thickness CT1 of the first lens on the optical axis satisfy: 0.2 < ET1 / CT1 < 0.7. For example, 0.2 < ET1 / CT1 < 0.4. Reasonably setting the proportional relationship between the edge thickness of the first lens and the central thickness of the first lens on the optical axis is beneficial to both reducing the overall length of the optical system, making the front end of the optical imaging lens thin and light, and reducing the processing sensitivity of the optical system.

[0058] In one embodiment, the edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET7 of the seventh lens satisfy: 0.3 < ET2 / (ET3 + ET7) < 0.8. Reasonably setting the mutual relationship among the edge thickness of the second lens, the edge thickness of the third lens, and the edge thickness of the seventh lens to satisfy the above conditions is beneficial to both reducing the overall length of the optical system, making the front end of the optical imaging lens thin and light, and reducing the processing sensitivity of the optical system.

[0059] In one embodiment, the ratio DT11 of the maximum effective radius of the object side surface of the first lens to the sum ∑AT of the distances between any two adjacent lenses among the first lens to the seventh lens on the optical axis satisfies: 0.5 < DT11 / ΣAT < 1.0. For example, 0.8 < DT11 / ΣAT < 1.0. Reasonably setting the ratio of the maximum effective radius of the object side surface of the first lens to the sum of the distances between any two adjacent lenses among the first lens to the seventh lens on the optical axis is beneficial to better balance the field curvature, axial spherical aberration and chromatic spherical aberration of the optical imaging lens, thereby enabling the optical system to have good imaging quality and low system sensitivity, and thus making the optical imaging lens have good processability.

[0060] In one embodiment, the axial distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens, the axial distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and the axial distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens satisfy: 0.2 < SAG22 / (SAG11 + SAG32) < 0.7. Reasonably setting the mutual relationship of the axial distance from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens, the axial distance from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and the axial distance from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens to satisfy the above conditions is beneficial to both the uniform distribution of the lens sizes in the optical imaging lens to ensure the assembly stability of the lens and the reduction of the aberration of the entire optical imaging lens, shortening the overall length of the optical imaging lens and reducing the processing difficulty of the lens.

[0061] In one embodiment, the ratio SAG62 of the axial distance from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens to the axial distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens satisfies: 0.7 < SAG62 / SAG71 < 1.2. Setting the ratio of the axial distance from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens to the axial distance from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens within a reasonable numerical range is beneficial to controlling the field curvature and distortion amount of the optical imaging lens within a reasonable range to improve the imaging quality of the optical system.

[0062] In one embodiment, the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 0.5 < (R5 + R6) / (R3 + R4) < 1.0. Reasonably setting the mutual relationship of the radius of curvature of the object side surface of the third lens, the radius of curvature of the image side surface of the third lens, the radius of curvature of the object side surface of the second lens, and the radius of curvature of the image side surface of the second lens to satisfy the above conditions is beneficial to controlling the contribution rate of coma of the above two lenses within a reasonable range, thereby better balancing the coma generated by the front lens and improving the imaging quality of the optical system.

[0063] In one embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 0.2 < (R7 + R8) / R10 < 0.7. Reasonably setting the mutual relationship of the radius of curvature of the object side surface of the fourth lens, the radius of curvature of the image side surface of the fourth lens, and the radius of curvature of the image side surface of the fifth lens to satisfy the above conditions is beneficial to controlling the thickness ratio trend of the aspherical surface of the fourth lens and enabling it to have good processing performance.

[0064] In one embodiment, the radius of curvature R11 of the object side surface of the sixth lens and the radius of curvature R14 of the image side surface of the seventh lens satisfy: 0.5 < R11 / (R11 + R14) < 1.0. Reasonably setting the mutual relationship of the radius of curvature of the object side surface of the sixth lens and the radius of curvature of the image side surface of the seventh lens to satisfy the above conditions is beneficial to controlling the deflection angle of the light rays in the optical system after passing through the sixth lens and the seventh lens, so that the light rays of each field of view of the optical system can better match the CRA of the chip when reaching the imaging surface.

[0065] In one embodiment, the central thickness CT2 of the second lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT7 of the seventh lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis satisfy: 0.5 < (CT2 + CT4 + CT5 + CT7) / (CT3 + CT6) < 1.0. Reasonably setting the mutual relationship of the central thicknesses of the above lenses on the optical axis to satisfy the above conditions is beneficial to reasonably distributing the space occupancy ratio of the above adjacent lenses in the optical system, ensuring the assembly processability of the lenses, and realizing the miniaturization of the optical imaging lens.

[0066] In an exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed at an appropriate position as required. For example, the stop may be disposed 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 located on the imaging surface.

[0067] The optical imaging lens according to the above embodiment of the present application may use multiple lenses, such as the seven lenses mentioned above. Through the reasonable distribution of optical power and the optimization of high-order aspheric parameters, the optical imaging lens of the present application can not only meet the high imaging quality of the optical system, but also meet the requirements that the optical system has a large aperture and a certain telephoto characteristic.

[0068] In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0069] The present application also provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with positive optical power, whose object side surface is convex; a second lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a third lens with optical power, whose image side surface is concave; a fourth lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a fifth lens with optical power, whose image side surface is concave; a sixth lens with positive optical power, whose object side surface is convex; and a seventh lens with optical power; wherein 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<1.5.

[0070] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0071] An exemplary embodiment of the present application also provides an electronic device including the imaging device described above.

[0072] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0073] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0074] Example 1

[0075] The following reference Figures 1 to 2D An optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 is a schematic diagram showing the structure of an optical imaging lens according to Example 1 of the present application.

[0076] like Figure 1 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0077] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0078] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0079]

[0080] Table 1

[0081] In this embodiment, the total effective focal length of the optical imaging lens is f=8.17 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.85 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.28 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 21.4°.

[0082] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0083]

[0084] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A76, A77, A8 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0085]

[0086] Table 2

[0087] Figure 2A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 2B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 2C The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 2D The magnification chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 2A to FIG. 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0088] Example 2

[0089] The following reference Figures 3 to 4DAn optical imaging lens according to Embodiment 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown.

[0090] like Figure 3 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0091] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is convex. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0092] In this embodiment, the total effective focal length of the optical imaging lens is f=8.16 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.84 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.27 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 21.3°.

[0093] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0094]

[0095] Table 3

[0096] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 4 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0097]

[0098]

[0099] Table 4

[0100] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 4B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 4C The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 4D The magnification chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0101] Example 3

[0102] The following reference Figures 5 to 6D An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0103] like Figure 5 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0104] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0105] In this embodiment, the total effective focal length of the optical imaging lens is f=8.15 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.86 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.29 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 21.5°.

[0106] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0107]

[0108]

[0109] Table 5

[0110] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 6 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0111] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -3.4463E-04 -6.8527E-05 -6.9871E-05 6.5245E-05 -2.5978E-05 5.5446E-06 -6.6886E-07 4.3060E-08 -1.1575E-09 S2 1.6335E-03 5.8416E-03 -4.1778E-03 1.5083E-03 -3.2177E-04 4.1656E-05 -3.1725E-06 1.2778E-07 -2.0117E-09 S3 -2.8443E-02 4.0628E-02 -3.1860E-02 1.4346E-02 -3.9716E-03 6.8787E-04 -7.2757E-05 4.3037E-06 -1.0919E-07 S4 -7.1485E-02 1.0316E-01 -7.4677E-02 2.3593E-02 -1.6525E-04 -2.1440E-03 6.4425E-04 -8.0796E-05 3.8605E-06 S5 -5.5182E-02 7.9566E-02 -4.9575E-02 8.2565E-03 5.8258E-03 -3.6532E-03 8.8164E-04 -1.0181E-04 4.6541E-06 S6 -3.0162E-02 1.8582E-02 -1.8074E-02 1.3923E-02 -7.3567E-03 2.5891E-03 -5.7738E-04 7.3989E-05 -4.1400E-06 S7 -3.2727E-02 -3.3347E-03 1.1989E-02 -1.5154E-02 1.0280E-02 -4.1483E-03 9.8769E-04 -1.2636E-04 6.6234E-06 S8 -2.7644E-02 1.4841E-02 -1.6753E-02 1.2275E-02 -5.6000E-03 1.5199E-03 -2.3608E-04 1.9281E-05 -6.3815E-07 S9 -4.9285E-02 -1.2311E-02 5.5012E-02 -6.0926E-02 3.9422E-02 -1.5828E-02 3.8083E-03 -5.0113E-04 2.7669E-05 S10 -5.8205E-02 1.5825E-03 3.1882E-02 -3.5771E-02 2.2422E-02 -8.6261E-03 1.9762E-03 -2.4506E-04 1.2606E-05 S11 -2.1681E-02 -3.2720E-03 1.7418E-04 1.7821E-04 1.0842E-04 -1.3143E-04 4.5815E-05 -6.6654E-06 3.4963E-07 S12 -1.1682E-02 -8.9056E-04 -4.0589E-03 2.9661E-03 -1.0806E-03 2.2894E-04 -2.7768E-05 1.7734E-06 -4.5922E-08 S13 -1.2445E-01 8.1594E-02 -3.8848E-02 1.1893E-02 -2.3298E-03 2.9823E-04 -2.4731E-05 1.2251E-06 -2.7566E-08 S14 -1.4799E-01 1.0175E-01 -5.1428E-02 1.6786E-02 -3.5069E-03 4.6609E-04 -3.8057E-05 1.7353E-06 -3.3696E-08

[0112] Table 6

[0113] Fig. 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.6D The magnification chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0114] Example 4

[0115] The following reference Figures 7 to 8D An optical imaging lens according to Embodiment 4 of the present application is described. Figure 7A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown.

[0116] like Figure 7 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0117] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0118] In this embodiment, the total effective focal length of the optical imaging lens is f=8.14 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.87 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.39 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 22.1°.

[0119] Table 7 shows a basic parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0120]

[0121] Table 7

[0122] In Example 4, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 8 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0123] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.3642E-04 -3.2738E-04 1.3524E-04 -2.8550E-05 -7.3302E-07 1.4205E-06 -2.6453E-07 2.0982E-08 -6.3571E-10 S2 1.4568E-03 7.4764E-03 -6.0350E-03 2.4530E-03 -5.8729E-04 8.5536E-05 -7.4182E-06 3.5062E-07 -6.9119E-09 S3 -2.9654E-02 4.4998E-02 -3.7138E-02 1.7414E-02 -4.9581E-03 8.7246E-04 -9.2643E-05 5.4363E-06 -1.3518E-07 S4 -7.2812E-02 1.0919E-01 -8.3444E-02 2.9707E-02 -2.5785E-03 -1.5658E-03 5.5944E-04 -7.3661E-05 3.5920E-06 S5 -5.6222E-02 8.5068E-02 -5.8341E-02 1.5445E-02 2.2645E-03 -2.5496E-03 6.7358E-04 -8.0053E-05 3.6880E-06 S6 -3.0777E-02 1.8865E-02 -1.7338E-02 1.2782E-02 -6.7050E-03 2.4033E-03 -5.4962E-04 7.2068E-05 -4.1094E-06 S7 -3.3011E-02 -5.3444E-03 1.5991E-02 -1.8845E-02 1.2055E-02 -4.5869E-03 1.0385E-03 -1.2824E-04 6.5908E-06 S8 -2.6353E-02 7.0882E-03 -1.7883E-03 -3.4686E-03 4.2747E-03 -2.2929E-03 6.6789E-04 -1.0286E-04 6.5807E-06 S9 -5.6893E-02 1.3499E-02 1.3722E-02 -2.0836E-02 1.4643E-02 -6.2114E-03 1.5616E-03 -2.1387E-04 1.2269E-05 S10 -6.2863E-02 1.7671E-02 9.2584E-03 -1.6127E-02 1.1212E-02 -4.5377E-03 1.0721E-03 -1.3530E-04 7.0083E-06 S11 -2.5511E-02 2.6003E-03 -6.8752E-03 5.9092E-03 -2.8005E-03 7.5925E-04 -1.1311E-04 8.5094E-06 -2.4878E-07 S12 -1.4342E-02 1.1828E-03 -5.4329E-03 3.8035E-03 -1.4302E-03 3.1598E-04 -4.0035E-05 2.6689E-06 -7.1886E-08 S13 -1.2069E-01 8.1986E-02 -4.0591E-02 1.3239E-02 -2.8423E-03 4.0674E-04 -3.7810E-05 2.0679E-06 -5.0140E-08 S14 -1.4266E-01 1.0010E-01 -5.1861E-02 1.7535E-02 -3.8208E-03 5.3214E-04 -4.5727E-05 2.2048E-06 -4.5546E-08

[0124] Table 8

[0125] Fig. 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 8C The distortion curve of the optical imaging lens of Example 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.8D The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0126] Example 5

[0127] The following reference Figures 9 to 10D An optical imaging lens according to Embodiment 5 of the present application is described. Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown.

[0128] like Fig. 9 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0129] The first lens E1 has positive power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0130] In this embodiment, the total effective focal length of the optical imaging lens is f=8.13 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.88 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.26 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 21.3°.

[0131] Table 9 shows a basic parameter table of the optical imaging lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0132]

[0133]

[0134] Table 9

[0135] In Example 5, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 10 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0136] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.3302E-04 -7.1035E-04 3.8978E-04 -1.2965E-04 2.4501E-05 -2.5541E-06 1.1746E-07 5.0772E-10 -1.6445E-10 S2 1.1859E-03 8.0429E-03 -6.6201E-03 2.7743E-03 -6.8934E-04 1.0482E-04 -9.5591E-06 4.7972E-07 -1.0183E-08 S3 -3.1857E-02 5.0223E-02 -4.2103E-02 2.0003E-02 -5.7812E-03 1.0364E-03 -1.1259E-04 6.7933E-06 -1.7471E-07 S4 -7.3379E-02 1.1309E-01 -9.1427E-02 3.7819E-02 -7.2617E-03 2.4429E-05 2.4624E-04 -4.0595E-05 2.1442E-06 S5 -5.5011E-02 8.4201E-02 -6.2723E-02 2.3011E-02 -3.0454E-03 -5.6648E-04 2.6072E-04 -3.4784E-05 1.6471E-06 S6 -3.0673E-02 1.7108E-02 -1.3031E-02 8.0291E-03 -3.7740E-03 1.3204E-03 -3.1084E-04 4.3054E-05 -2.6170E-06 S7 -3.3735E-02 -3.4320E-03 1.2937E-02 -1.6030E-02 1.0186E-02 -3.7449E-03 8.0985E-04 -9.4839E-05 4.5600E-06 S8 -2.5302E-02 4.5640E-03 1.8486E-03 -6.9578E-03 6.1991E-03 -2.8914E-03 7.7518E-04 -1.1352E-04 7.0253E-06 S9 -5.4597E-02 1.5337E-04 4.1505E-02 -5.1826E-02 3.5536E-02 -1.4988E-02 3.8034E-03 -5.3215E-04 3.1499E-05 S10 -6.2560E-02 1.3284E-02 1.9512E-02 -2.6780E-02 1.7594E-02 -6.8872E-03 1.5928E-03 -1.9862E-04 1.0243E-05 S11 -2.6690E-02 2.7468E-03 -5.9981E-03 4.9473E-03 -2.2441E-03 5.5692E-04 -6.9212E-05 3.4472E-06 -1.2053E-08 S12 -1.5068E-02 4.5711E-04 -3.6904E-03 2.5397E-03 -9.0767E-04 1.8243E-04 -1.9546E-05 9.5102E-07 -1.1552E-08 S13 -1.1377E-01 6.7122E-02 -2.8924E-02 8.3638E-03 -1.6202E-03 2.1441E-04 -1.9034E-05 1.0242E-06 -2.4886E-08 S14 -1.3501E-01 8.9660E-02 -4.5573E-02 1.5413E-02 -3.3840E-03 4.7508E-04 -4.1036E-05 1.9812E-06 -4.0815E-08

[0137] Table 10

[0138] Fig. 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 10C The distortion curve of the optical imaging lens of Example 5 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig. 10D The magnification chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0139] Example 6

[0140] The following reference Figures 11 to 12D An optical imaging lens according to Example 6 of the present application is described. Fig.11A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0141] like Fig.11 As shown, the optical imaging lens includes, from the object side to the image side along the optical axis, a first lens E1, an aperture 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 imaging surface S17.

[0142] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0143] In this embodiment, the total effective focal length of the optical imaging lens is f=8.12 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 is 8.87 mm, half of the diagonal length of the effective pixel area on the imaging surface S17 is ImgH=3.26 mm, and the maximum half field of view Semi-FOV of the optical imaging lens is 21.4°.

[0144] Table 11 shows a basic parameter table of the optical imaging lens of Example 6, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0145]

[0146] Table 11

[0147] In Example 6, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. Table 12 below lists the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, 10 , A 12 , A 14 , A 16 , A 18 and A 20 .

[0148] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 6.2016E-04 -1.1238E-03 5.9604E-04 -2.1814E-04 5.2672E-05 -8.2471E-06 7.9849E-07 -4.3344E-08 1.0076E-09 S2 1.0140E-02 -7.2045E-03 4.4300E-03 -1.7484E-03 4.5708E-04 -7.9619E-05 8.8735E-06 -5.6954E-07 1.5940E-08 S3 -2.3115E-02 3.3434E-02 -2.8981E-02 1.4567E-02 -4.4743E-03 8.5095E-04 -9.7766E-05 6.2146E-06 -1.6765E-07 S4 -7.2176E-02 1.0871E-01 -8.7042E-02 3.5862E-02 -6.7606E-03 -8.1622E-05 2.6825E-04 -4.3641E-05 2.3191E-06 S5 -5.4789E-02 8.3419E-02 -5.9813E-02 1.9277E-02 -6.5995E-04 -1.4278E-03 4.3955E-04 -5.4751E-05 2.5799E-06 S6 -3.2717E-02 2.5645E-02 -2.4132E-02 1.5593E-02 -6.9565E-03 2.2326E-03 -4.9093E-04 6.4597E-05 -3.7309E-06 S7 -2.6484E-02 -2.1412E-02 3.9578E-02 -4.2606E-02 2.7068E-02 -1.0240E-02 2.2623E-03 -2.6860E-04 1.3202E-05 S8 -2.1724E-02 -5.3805E-03 1.6128E-02 -2.2458E-02 1.6702E-02 -6.8997E-03 1.5845E-03 -1.8899E-04 9.1116E-06 S9 -6.3564E-02 5.3163E-02 -5.6912E-02 4.4384E-02 -2.3177E-02 8.4553E-03 -2.1301E-03 3.2393E-04 -2.1669E-05 S10 -5.0568E-02 -1.8546E-03 3.7127E-02 -4.8567E-02 3.4033E-02 -1.3791E-02 3.2040E-03 -3.9497E-04 1.9995E-05 S11 -1.9027E-02 -9.7485E-03 6.1134E-03 -3.3870E-03 1.4145E-03 -4.0686E-04 7.7782E-05 -8.5013E-06 3.8774E-07 S12 -1.3545E-02 1.5622E-03 -6.8919E-03 4.7852E-03 -1.8002E-03 4.0809E-04 -5.4264E-05 3.8553E-06 -1.1201E-07 S13 -1.3968E-01 1.1816E-01 -6.8976E-02 2.5119E-02 -5.8258E-03 8.7272E-04 -8.2095E-05 4.4045E-06 -1.0243E-07 S14 -1.5699E-01 1.1954E-01 -6.2999E-02 2.0765E-02 -4.3389E-03 5.7606E-04 -4.7054E-05 2.1515E-06 -4.2026E-08

[0149] Table 12

[0150] Fig. 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig. 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Fig.12D The magnification chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 12A to FIG. 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0151] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0152] Conditional / Example 1 2 3 4 5 6 TTL / f 1.08 1.08 1.09 1.09 1.09 1.09 f / EPD 1.37 1.36 1.38 1.39 1.40 1.40 T12 / CT2 0.55 0.72 0.55 0.53 0.52 0.55 f1 / f-f2 / f 1.93 1.68 1.94 1.96 1.96 1.92 (f6-f7) / (f3+f4) 0.53 0.43 0.52 0.54 0.56 0.66 SD / f123 0.50 0.49 0.49 0.49 0.50 0.49 ET1 / CT1 0.29 0.24 0.29 0.29 0.28 0.34 ET2 / (ET3+ET7) 0.59 0.66 0.56 0.54 0.51 0.55 DT11 / ΣAT 0.91 0.92 0.91 0.91 0.91 0.87 SAG22 / (SAG11+SAG32) 0.41 0.37 0.40 0.39 0.39 0.40 SAG62 / SAG71 0.82 0.91 0.91 0.85 1.01 0.94 (R5+R6) / (R3+R4) 0.86 0.74 0.85 0.85 0.85 0.84 (R7+R8) / R10 0.59 0.41 0.59 0.53 0.40 0.36 R11 / (R11+R14) 0.68 0.67 0.72 0.69 0.75 0.81 (CT2+CT4+CT5+CT7) / (CT3+CT6) 0.69 0.72 0.68 0.67 0.65 0.71

[0153] Table 13

[0154] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: A first lens having positive optical power, whose object side surface is convex; The second lens has a negative optical power, and its object side surface is convex and its image side surface is concave; The third lens has positive power, its object side surface is convex and its image side surface is concave; a fourth lens element having positive refractive power, whose object side surface is convex and image side surface is concave; a fifth lens having optical power and having an image side surface which is concave; a sixth lens element having positive refractive power and having a convex object-side surface; and The seventh lens element has a negative optical power and its image side surface is concave; The number of lenses having optical power in the optical imaging lens is seven; The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: 1.3 <f / EPD≤1.40; The spacing distance T12 between the first lens and the second lens on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy: 0.5 <T12 / CT2≤0.72; The effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy: 0.4<(f6-f7) / (f3+f4)<0.

7.

2. The optical imaging lens according to claim 1, wherein: The distance TTL from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis and the total effective focal length f of the optical imaging lens satisfy: 1.0≤TTL / f≤1.

1.

3. The optical imaging lens according to 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 f2 of the second lens satisfy: 1.68≤f1 / f-f2 / f<2.

0.

4. The optical imaging lens according to claim 1, wherein: The distance SD from the aperture in the optical imaging lens to the image side surface of the seventh lens on the optical axis and the combined focal length f123 of the first lens, the second lens and the third lens satisfy: 0.4 <SD / f123≤0.50。 5. The optical imaging lens according to claim 1, wherein: The edge thickness ET1 of the first lens and the center thickness CT1 of the first lens on the optical axis satisfy: 0.2 <ET1 / CT1≤0.34。 6. The optical imaging lens according to claim 1, wherein: The edge thickness ET2 of the second lens, the edge thickness ET3 of the third lens, and the edge thickness ET7 of the seventh lens satisfy: 0.51≤ET2 / (ET3+ET7)≤0.

66.

7. The optical imaging lens according to claim 1, wherein: The maximum effective radius DT11 of the object side of the first lens and the sum of the distances between any two adjacent lenses from the first lens to the seventh lens on the optical axis ΣAT satisfy: 0.87≤DT11 / ΣAT≤0.

92.

8. The optical imaging lens according to claim 1, wherein: An axial distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens, an axial distance SAG22 from the intersection of the image side surface of the second lens and the optical axis to the vertex of the effective radius of the image side surface of the second lens, and an axial distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens satisfy: 0.37≤SAG22 / (SAG11+SAG32)≤0.

41.

9. The optical imaging lens according to claim 1, wherein: An axial distance SAG62 from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens and an axial distance SAG71 from the intersection of the object side surface of the seventh lens and the optical axis to the vertex of the effective radius of the object side surface of the seventh lens satisfy: 0.82≤SAG62 / SAG71≤1.

01.

10. The optical imaging lens according to claim 1, wherein: The curvature radius R5 of the object side surface of the third lens, the curvature radius R6 of the image side surface of the third lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 0.74≤(R5+R6) / (R3+R4)≤0.

86.

11. The optical imaging lens according to claim 1, wherein: The curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R10 of the image side surface of the fifth lens satisfy: 0.36≤(R7+R8) / R10≤0.

59.

12. The optical imaging lens according to claim 1, wherein: The curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens satisfy: 0.67≤R11 / (R11+R14)≤0.

81.

13. The optical imaging lens according to claim 1, wherein: The center thickness CT2 of the second lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the center thickness CT7 of the seventh lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 0.65≤(CT2+CT4+CT5+CT7) / (CT3+CT6)≤0.72.

Images