Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which comprises, in order from the object side to the image side along the optical axis: a first lens having optical power, whose object side surface is concave; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having optical power; a sixth lens having negative optical power; and a seventh lens having negative optical power. The maximum field of view (FOV) of the optical imaging lens satisfies the following conditions: 105° < FOV < 120°, thus providing the optical imaging lens with a large field of view and high imaging quality.

Description

Technical Field

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

[0002] In recent years, with the rapid development of big data and artificial intelligence, market demand for wearable smart devices has gradually increased, and the market demand for imaging lenses that support wearable smart devices has also been growing. Due to the demand for compactness of wearable smart products, the imaging lenses that support these products have also gradually become smaller and lighter. At the same time, in order to achieve a better sensory experience, the demand for high pixel density in these imaging lenses is also an inevitable development requirement. Summary of the Invention

[0003] The present application provides an optical imaging lens that is applicable to portable electronic products and can at least solve or partially solve at least one of the above-mentioned shortcomings in the prior art, such as an optical imaging lens with an ultra-large field of view and high imaging quality.

[0004] One aspect of the present application provides an optical imaging lens. The optical imaging lens may include, in order from the object side to the image side along the optical axis: a first lens having optical power, whose object-side surface is concave; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having optical power; a sixth lens having negative optical power; and a seventh lens having negative optical power. The maximum field of view (FOV) of the optical imaging lens may satisfy the following: 105° < FOV < 120°.

[0005] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f6 of the sixth lens, and the total effective focal length f of the optical imaging lens may satisfy: -1.0<f / f1+f / f6<0.

[0006] In one embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens may satisfy: 0.3<f7 / f3<1.3.

[0007] In one embodiment, the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens and the total effective focal length f of the optical imaging lens may satisfy the following relationship: 0.5<f / f456<1.5.

[0008] In one embodiment, the effective focal length f2 of the second 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 may satisfy: 0<f2 / (R3+|R4|)<1.0.

[0009] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens may satisfy: 0.2<(R1+R2) / R1<1.2.

[0010] In one embodiment, a curvature radius R5 of the object-side surface of the third lens and a curvature radius R6 of the image-side surface of the third lens may satisfy: 0.5<R5 / (R5+R6)<1.0.

[0011] In one embodiment, the effective focal length f4 of the fourth lens, the curvature radius R7 of the object-side surface of the fourth lens, and the curvature radius R8 of the image-side surface of the fourth lens may satisfy: 0.2<f4 / (R7-R8)<0.7.

[0012] In one embodiment, 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 SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens may satisfy: 0.3<SAG22 / (SAG22-SAG72)<0.8.

[0013] In one embodiment, the edge thickness ET1 of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy: 0.3<ET1 / DT12<0.8.

[0014] In one embodiment, an edge thickness ET6 of the sixth lens and a maximum effective radius DT62 of the image-side surface of the sixth lens may satisfy: 0.2<ET6 / DT62<0.7.

[0015] In one embodiment, an edge thickness ET2 of the second lens and a center thickness CT2 of the second lens on the optical axis may satisfy: 0.3<ET2 / CT2<0.8.

[0016] In one embodiment, a central thickness CT4 of the fourth lens on the optical axis and a maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: 0.4<CT4 / DT42<1.0.

[0017] In one embodiment, a curvature radius R10 of the image-side surface of the fifth lens, a curvature radius R13 of the object-side surface of the seventh lens, and a curvature radius R14 of the image-side surface of the seventh lens may satisfy: -1.0<(R13+R14) / R10<0.

[0018] In one embodiment, a center thickness CT1 of the first lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.7<CT1 / CT7<1.2.

[0019] In one embodiment, the center thickness CT3 of the third lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT3 / (CT5+CT6)<0.7.

[0020] In one embodiment, the air interval T12 between the first lens and the second lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the air interval T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 0.4<(T34+T45+T56) / T12<1.0.

[0021] In one embodiment, the first lens may have negative optical power and its image-side surface is concave; the second lens may have positive optical power and its object-side surface is convex; the third lens may have negative optical power, its object-side surface is convex and its image-side surface is concave; the object-side surface of the fourth lens may be convex and its image-side surface may be convex; and the image-side surface of the fifth lens may be convex.

[0022] Another aspect of the present application provides an optical imaging lens. The optical imaging lens may include, in order from the object side to the image side along the optical axis: a first lens having optical power, whose object-side surface is concave; a second lens having optical power; a third lens having optical power; a fourth lens having positive optical power; a fifth lens having optical power; a sixth lens having negative optical power; and a seventh lens having negative optical power. The curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens may satisfy the following relationship: 0.2 < (R1 + R2) / R1 < 1.2.

[0023] In one embodiment, the effective focal length f1 of the first lens, the effective focal length f6 of the sixth lens, and the total effective focal length f of the optical imaging lens may satisfy: -1.0<f / f1+f / f6<0.

[0024] In one embodiment, the effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens may satisfy: 0.3<f7 / f3<1.3.

[0025] In one embodiment, the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens and the total effective focal length f of the optical imaging lens may satisfy the following relationship: 0.5<f / f456<1.5.

[0026] In one embodiment, the effective focal length f2 of the second 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 may satisfy: 0<f2 / (R3+|R4|)<1.0.

[0027] In one embodiment, the maximum field of view (FOV) of the optical imaging lens may satisfy the following condition: 105°<FOV<120°.

[0028] In one embodiment, a curvature radius R5 of the object-side surface of the third lens and a curvature radius R6 of the image-side surface of the third lens may satisfy: 0.5<R5 / (R5+R6)<1.0.

[0029] In one embodiment, the effective focal length f4 of the fourth lens, the curvature radius R7 of the object-side surface of the fourth lens, and the curvature radius R8 of the image-side surface of the fourth lens may satisfy: 0.2<f4 / (R7-R8)<0.7.

[0030] In one embodiment, 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 SAG72 from the intersection of the image side surface of the seventh lens and the optical axis to the effective radius vertex of the image side surface of the seventh lens may satisfy: 0.3<SAG22 / (SAG22-SAG72)<0.8.

[0031] In one embodiment, the edge thickness ET1 of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy: 0.3<ET1 / DT12<0.8.

[0032] In one embodiment, an edge thickness ET6 of the sixth lens and a maximum effective radius DT62 of the image-side surface of the sixth lens may satisfy the following relationship: 0.2<ET6 / DT62<0.7.

[0033] In one embodiment, an edge thickness ET2 of the second lens and a center thickness CT2 of the second lens on the optical axis may satisfy: 0.3<ET2 / CT2<0.8.

[0034] In one embodiment, a central thickness CT4 of the fourth lens on the optical axis and a maximum effective radius DT42 of the image-side surface of the fourth lens may satisfy: 0.4<CT4 / DT42<1.0.

[0035] In one embodiment, a curvature radius R10 of the image-side surface of the fifth lens, a curvature radius R13 of the object-side surface of the seventh lens, and a curvature radius R14 of the image-side surface of the seventh lens may satisfy: -1.0<(R13+R14) / R10<0.

[0036] In one embodiment, a center thickness CT1 of the first lens on the optical axis and a center thickness CT7 of the seventh lens on the optical axis may satisfy: 0.7< CT1 / CT7 < 1.2.

[0037] In one embodiment, the center thickness CT3 of the third lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis may satisfy: 0.2<CT3 / (CT5+CT6)<0.7.

[0038] In one embodiment, the air interval T12 between the first lens and the second lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, the air interval T45 between the fourth lens and the fifth lens on the optical axis, and the air interval T56 between the fifth lens and the sixth lens on the optical axis may satisfy: 0.4<(T34+T45+T56) / T12<1.0.

[0039] In one embodiment, the first lens may have negative optical power and its image-side surface is concave; the second lens may have positive optical power and its object-side surface is convex; the third lens may have negative optical power, its object-side surface is convex and its image-side surface is concave; the object-side surface of the fourth lens may be convex and its image-side surface may be convex; and the image-side surface of the fifth lens may be convex.

[0040] The optical imaging lens provided in this application uses multiple lenses, such as the first lens to the seventh lens. By reasonably controlling the maximum field of view angle of the optical imaging system and optimizing the optical focal length and surface shape of each lens, the optical imaging lens can achieve an ultra-large field of view while having high imaging quality. At the same time, each lens has a compact structure and good molding and processing performance, which can improve the production yield of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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:

[0042] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0043] Figures 2A to 2D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 1 are respectively shown;

[0044] Figure 3 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0045] Figures 4A to 4D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 2 are respectively shown;

[0046] Figure 5 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0047] 6A to 6D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 3 are respectively shown;

[0048] Figure 7 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0049] Figures 8A to 8D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 4 are respectively shown;

[0050] Figure 9 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0051] 10A to 10D axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 5 are respectively shown;

[0052] Figure 11 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0053] 12A to 12D The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Example 6 are respectively shown. DETAILED DESCRIPTION

[0054] 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 these detailed descriptions are merely 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.

[0055] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0056] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0057] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0058] 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 preclude 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 list of 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.

[0059] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0060] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0061] The features, principles and other aspects of the present application are described in detail below.

[0062] An optical imaging lens according to an exemplary embodiment of the present application may include seven lenses having optical power: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the object side to the image side. Each adjacent pair of lenses, from the first lens to the seventh lens, may have an air space between them.

[0063] In an exemplary embodiment, the first lens has positive or negative optical power and its object-side surface is concave; the second lens has positive or negative optical power; the third lens has positive or negative optical power; the fourth lens can have positive optical power; the fifth lens has positive or negative optical power; the sixth lens can have negative optical power; and the seventh lens can have negative optical power. Properly matching the optical power and surface shape of each lens in the optical system facilitates balancing and correcting various aberrations in the optical lens, ensuring that the optical imaging lens maintains a wide field of view while maintaining high-quality imaging quality.

[0064] In example embodiments, the object-side surface of the first lens may be a concave surface, and the image-side surface may be a concave surface.

[0065] In example embodiments, the object-side surface of the second lens may be a convex surface, and the image-side surface may be a convex surface.

[0066] In example embodiments, the object-side surface of the third lens may be convex, and the image-side surface may be concave.

[0067] In example embodiments, the object-side surface of the fourth lens may be a convex surface, and the image-side surface may be a convex surface.

[0068] In example embodiments, the image-side surface of the fifth lens may be a convex surface.

[0069] In example embodiments, the object-side surface of the seventh lens may be convex, and the image-side surface may be concave.

[0070] In an exemplary embodiment, the maximum field of view (FOV) of the optical imaging lens may satisfy the following conditions: 105° < FOV < 120°. By controlling the maximum field of view of the optical imaging lens within a reasonable value range, the optical imaging lens can have a wide-angle function.

[0071] In an exemplary embodiment, the effective focal length f1 of the first lens element, the effective focal length f6 of the sixth lens element, and the total effective focal length f of the optical imaging lens may satisfy the following: -1.0 < f / f1 + f / f6 < 0. Properly controlling the relationship between the effective focal lengths of the first and sixth lenses and the total effective focal length of the optical imaging lens facilitates correction of chromatic aberration in the optical imaging system.

[0072] In an exemplary embodiment, the effective focal length f3 of the third lens element and the effective focal length f7 of the seventh lens element may satisfy the following relationship: 0.3 < f7 / f3 < 1.3. By controlling the ratio of the effective focal lengths of the third lens element to the seventh lens element within a reasonable range, axial chromatic aberration of the optical imaging system can be corrected.

[0073] In an exemplary embodiment, the combined focal length f456 of the fourth, fifth, and sixth lenses and the total effective focal length f of the optical imaging lens satisfy the following relationship: 0.5 < f / f456 < 1.5. By controlling the ratio of the combined focal length of the fourth, fifth, and sixth lenses to the total effective focal length of the optical imaging lens within a reasonable range, vertical chromatic aberration of the optical imaging system can be corrected, effectively reducing the risk of purple fringing in images produced by the optical imaging lens.

[0074] In an exemplary embodiment, the effective focal length f2 of the second 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 may satisfy the following relationship: 0 < f2 / (R3 + |R4|) < 1.0. Properly controlling the relationship between the effective focal length, the radius of curvature of the object-side surface, and the radius of curvature of the image-side surface of the second lens facilitates correcting spherical aberration in the optical imaging system and improving the imaging quality of wide-angle imaging lenses.

[0075] In an exemplary embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy the following relationship: 0.2 < (R1 + R2) / R1 < 1.2. By controlling the ratio of the radius of curvature of the object-side surface to the image-side surface of the first lens within a reasonable range, axial chromatic aberration and other aberrations of the optical imaging system can be corrected.

[0076] In an exemplary embodiment, the radius of curvature R5 of the object-side surface of the third lens element and the radius of curvature R6 of the image-side surface of the third lens element may satisfy the following relationship: 0.5 < R5 / (R5 + R6) < 1.0. By controlling the ratio of the radius of curvature of the object-side surface to the image-side surface of the third lens element within a reasonable range, spherical aberration and aberration correction of the optical imaging system can be facilitated.

[0077] In an exemplary embodiment, the effective focal length f4 of the fourth lens element, the radius of curvature R7 of the object-side surface of the fourth lens element, and the radius of curvature R8 of the image-side surface of the fourth lens element may satisfy the following relationship: 0.2 < f4 / (R7 - R8) < 0.7. Properly controlling the relationship between the effective focal length, the radius of curvature of the object-side surface, and the radius of curvature of the image-side surface of the fourth lens element facilitates correction of spherical aberration and astigmatism in the optical imaging system, improving the clarity of the wide-angle imaging lens.

[0078] In an exemplary embodiment, the on-axis 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 on-axis distance SAG72 from the intersection of the image-side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image-side surface of the seventh lens may satisfy the following: 0.3 < SAG22 / (SAG22 - SAG72) < 0.8. Properly controlling the relationship between the sagittal height of the image-side surface of the second lens and the sagittal height of the image-side surface of the seventh lens facilitates correcting astigmatism in the optical imaging system and ensuring balanced imaging quality in different directions of the optical imaging lens.

[0079] In an exemplary embodiment, the edge thickness ET1 of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens may satisfy the following relationship: 0.3 < ET1 / DT12 < 0.8. By controlling the ratio of the edge thickness of the first lens to the maximum effective radius of the image-side surface within a reasonable range, the optical power of the first lens can be effectively limited, facilitating the proper distribution of the optical power of the optical system, improving the imaging quality of the optical imaging lens, and meeting the manufacturing process requirements for the optical imaging lens.

[0080] In an exemplary embodiment, the edge thickness ET6 of the sixth lens element and the maximum effective radius DT62 of the image-side surface of the sixth lens element may satisfy the following relationship: 0.2 < ET6 / DT62 < 0.7. By controlling the ratio of the edge thickness of the sixth lens element to the maximum effective radius of the image-side surface within a reasonable range, the shape of the sixth lens element can be properly maintained and the off-axis field curvature aberration of the optical imaging system can be effectively corrected, resulting in more balanced imaging quality at the center and edges of the optical imaging lens.

[0081] In an exemplary embodiment, the edge thickness ET2 of the second lens and its center thickness CT2 along the optical axis may satisfy the following relationship: 0.3 < ET2 / CT2 < 0.8. By controlling the ratio of the edge thickness to the center thickness along the optical axis of the second lens within a reasonable range, the optical power of the second lens can be effectively limited while also facilitating correction of axial chromatic aberration in the optical imaging system, thereby meeting the process requirements for manufacturing optical imaging lenses.

[0082] In an exemplary embodiment, the central thickness CT4 of the fourth lens element on the optical axis and the maximum effective radius DT42 of the image-side surface of the fourth lens element may satisfy the following relationship: 0.4 < CT4 / DT42 < 1.0. By controlling the ratio of the central thickness of the fourth lens element on the optical axis to the maximum effective radius of the image-side surface within a reasonable range, the shape of the fourth lens element can be effectively constrained, facilitating the fabrication of optical imaging lenses and correcting vertical aberrations in optical imaging systems.

[0083] In an exemplary embodiment, the radius of curvature R10 of the image-side surface of the fifth lens element, the radius of curvature R13 of the object-side surface of the seventh lens element, and the radius of curvature R14 of the image-side surface of the seventh lens element may satisfy the following relationship: -1.0 < (R13 + R14) / R10 < 0. Properly controlling the relationship between the radii of curvature of the image-side surface of the fifth lens element, the object-side surface of the seventh lens element, and the image-side surface of the seventh lens element allows for optimal configuration of the optical power of the optical imaging lens, facilitating correction of off-axis field curvature of the optical imaging system.

[0084] In an exemplary embodiment, the center thickness CT1 of the first lens element and the center thickness CT7 of the seventh lens element along the optical axis may satisfy the following relationship: 0.7 < CT1 / CT7 < 1.2. By controlling the ratio of the center thicknesses of the first lens element to the seventh lens element along the optical axis within a reasonable range, vertical chromatic aberration of the optical imaging system can be corrected.

[0085] In an exemplary embodiment, the center thicknesses CT3, CT5, and CT6 of the third, fifth, and sixth lenses along the optical axis satisfy the following relationship: 0.2 < CT3 / (CT5 + CT6) < 0.7. Properly controlling the relationship between the center thicknesses of the third, fifth, and sixth lenses along the optical axis facilitates correcting various aberrations of the optical imaging system while maintaining a compact optical length of the optical imaging lens.

[0086] In an exemplary embodiment, the air spacing T12 between the first and second lenses, the air spacing T34 between the third and fourth lenses, the air spacing T45 between the fourth and fifth lenses, and the air spacing T56 between the fifth and sixth lenses on the optical axis may satisfy the following relationship: 0.4 < (T34 + T45 + T56) / T12 < 1.0. Properly controlling the relationship between the air spacings between the first and second lenses, the third and fourth lenses, the fourth and fifth lenses, and the fifth and sixth lenses facilitates correcting astigmatism in the optical imaging lens.

[0087] In an exemplary embodiment, the first lens may have negative power and a concave image-side surface; the second lens may have positive power and a convex object-side surface; the third lens may have negative power, a convex object-side surface, and a concave image-side surface; the fourth lens may have a convex object-side surface and a convex image-side surface; and the fifth lens may have a convex image-side surface. The optical imaging lens meeting the aforementioned power and surface profile distribution facilitates balanced elimination of spherical aberration, coma, and field of view in the optical system, while also reducing the risk of ghosting in the imaging lens.

[0088] In an exemplary embodiment, the optical imaging lens may further include an aperture. The aperture may be positioned appropriately as needed. For example, the aperture may be positioned 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 the photosensitive element located on the imaging surface.

[0089] This application proposes an optical imaging lens with a wide field of view and high imaging quality. The optical imaging lens according to the above-described embodiment of this application can utilize multiple lens elements, such as the seven described above. By rationally allocating the focal power, surface shape, center thickness of each lens, and on-axis spacing between lenses, it can effectively converge incident light, reduce the overall optical length of the imaging lens, and improve the processability of the imaging lens, making the optical imaging lens more suitable for production and processing.

[0090] 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 surface of the first lens to the image side surface 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 with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, with the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the 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 surface and the image side surface 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.

[0091] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0092] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe seven lenses as an example, the optical imaging lens is not limited to including seven lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0093] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0094] Example 1

[0095] The following reference Figures 1 to 2D The optical imaging lens according to Example 1 of the present application is described. Figure 1 2 is a schematic structural diagram of an optical imaging lens according to Example 1 of the present application.

[0096] 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.

[0097] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0098] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness and focal length are all millimeters (mm).

[0099]

[0100]

[0101] Table 1

[0102] In this embodiment, the total effective focal length f of the optical imaging lens is 1.77 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 4.03 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 1.93 mm, the maximum field of view FOV of the optical imaging lens is 112.0°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.20.

[0103] 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. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0104]

[0105] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface 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 conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 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, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40 10 、A 12 、A 14 and A 16 .

[0106] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.5129E-01 -1.1613E+00 1.7118E+00 -1.6550E+00 7.6323E-01 0.0000E+00 0.0000E+00 S2 1.4422E+00 -1.9667E+00 1.0225E+01 -2.4959E+01 4.2877E+01 0.0000E+00 0.0000E+00 S3 1.4502E-01 -5.7606E-01 8.1495E-04 -1.5316E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.0341E+00 1.4859E+00 -5.1339E+00 9.3474E+00 -6.9249E+00 0.0000E+00 0.0000E+00 S5 -1.1606E+00 1.3695E+00 -4.5032E+00 1.2087E+01 -1.5890E+01 1.0720E+01 0.0000E+00 S6 -1.7850E-01 -5.9261E-01 1.7174E+00 -1.6646E+00 4.1614E-01 0.0000E+00 0.0000E+00 S7 -2.2563E-01 7.2083E-01 -4.1356E+00 1.3792E+01 -2.6562E+01 2.8343E+01 -1.2822E+01 S8 -1.4343E+00 1.1204E+01 -4.7240E+01 1.1646E+02 -1.6448E+02 1.2239E+02 -3.6444E+01 S9 -1.6254E+00 1.2964E+01 -5.2830E+01 1.2471E+02 -1.6687E+02 1.1703E+02 -3.3338E+01 S10 -1.2944E-01 2.8869E+00 -1.3839E+01 3.1055E+01 -3.5693E+01 2.0463E+01 -4.6471E+00 S11 1.2243E+00 -2.8015E+00 1.1777E+00 3.2538E+00 -5.7058E+00 3.7092E+00 -8.8190E-01 S12 1.4037E+00 -3.9978E+00 5.5160E+00 -4.6260E+00 2.3819E+00 -6.8620E-01 8.3790E-02 S13 -4.9651E-01 -1.6891E+00 3.7907E+00 -3.4778E+00 1.6955E+00 -4.3370E-01 4.5797E-02 S14 -7.0695E-01 5.3750E-01 -1.8894E-01 1.8443E-02 5.8405E-03 -1.3339E-03 0.0000E+00

[0107] Table 2

[0108] 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 field curvature and the sagittal field 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 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. Figures 2A to 2D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0109] Example 2

[0110] The following reference Figures 3 to 4D The optical imaging lens according to Example 2 of the present application is described. Figure 3 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0111] 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.

[0112] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0113] In this embodiment, the total effective focal length f of the optical imaging lens is 1.74 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 4.14 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 1.93 mm, the maximum field of view FOV of the optical imaging lens is 112.1°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.20.

[0114] Table 3 shows the basic parameters of the optical imaging lens of Example 2, wherein the units of the curvature radius, thickness and focal length are all millimeters (mm).

[0115]

[0116]

[0117] Table 3

[0118] 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 all 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, 10 、A 12 、A 14 and A 16 .

[0119] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.4914E-01 -1.0412E+00 1.5071E+00 -1.3999E+00 5.6332E-01 0.0000E+00 0.0000E+00 S2 1.2519E+00 -6.3574E-01 3.8413E-01 1.4966E+01 -1.6102E+01 0.0000E+00 0.0000E+00 S3 1.0335E-01 -2.1391E-01 -1.5004E+00 2.9122E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -9.7382E-01 1.4013E+00 -5.4511E+00 9.5064E+00 -5.2513E+00 0.0000E+00 0.0000E+00 S5 -9.9762E-01 8.7878E-01 1.2030E+00 -1.8344E+01 4.9263E+01 -3.7534E+01 0.0000E+00 S6 -4.9086E-01 6.2164E-01 -5.7993E-01 -4.2066E-01 1.2927E+00 0.0000E+00 0.0000E+00 S7 -1.0088E-01 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -7.6796E-01 5.1970E+00 -1.8477E+01 3.7565E+01 -4.2584E+01 2.4976E+01 -5.8633E+00 S9 -1.6473E+00 1.0172E+01 -3.3212E+01 6.3960E+01 -7.0019E+01 3.9953E+01 -9.1838E+00 S10 -1.0943E-01 1.2578E+00 -4.5455E+00 8.2292E+00 -7.5153E+00 3.3492E+00 -5.8291E-01 S11 1.9174E+00 -5.7980E+00 1.0252E+01 -1.3858E+01 1.2470E+01 -6.0774E+00 1.1877E+00 S12 1.5584E+00 -3.6518E+00 3.9635E+00 -2.3993E+00 8.0524E-01 -1.2454E-01 2.9857E-03 S13 -8.9298E-01 -7.8882E-01 2.8545E+00 -2.9195E+00 1.4675E+00 -3.6574E-01 3.5102E-02 S14 -8.3913E-01 8.0943E-01 -4.0613E-01 1.0919E-01 -1.5631E-02 9.6739E-04 0.0000E+00

[0120] Table 4

[0121] Figure 4A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 4BThe astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field 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 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. Figures 4A to 4D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0122] Example 3

[0123] The following reference Figures 5 to 6D The optical imaging lens according to Example 3 of the present application is described. Figure 5 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0124] 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.

[0125] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging surface S17.

[0126] In this embodiment, the total effective focal length f of the optical imaging lens is 1.68 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 4.11 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 1.93 mm, the maximum field of view FOV of the optical imaging lens is 112.1°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.08.

[0127] Table 5 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of curvature radius, thickness and focal length are all millimeters (mm).

[0128]

[0129] Table 5

[0130] 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 all 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, 10 、A 12 、A 14 and A 16 .

[0131] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.2239E-01 -9.4142E-01 1.4677E+00 -1.6150E+00 8.2590E-01 0.0000E+00 0.0000E+00 S2 1.3294E+00 -2.0091E+00 1.2257E+01 -3.4243E+01 4.9807E+01 0.0000E+00 0.0000E+00 S3 3.1934E-01 -7.4283E-01 -1.0484E+00 6.6915E-01 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.2862E+00 3.1993E+00 -1.2353E+01 2.1415E+01 -1.4674E+01 0.0000E+00 0.0000E+00 S5 -1.2840E+00 2.0335E+00 -6.5166E+00 5.4532E+00 6.5444E+00 -3.7861E+00 0.0000E+00 S6 -3.8473E-01 -2.7901E-01 1.4743E-01 6.7271E-01 -3.8768E-01 0.0000E+00 0.0000E+00 S7 -5.9996E-02 -1.5025E-01 -3.9432E-01 1.8778E+00 -2.2686E+00 8.8830E-01 0.0000E+00 S8 8.3972E-02 -2.2442E+00 1.2874E+01 -3.3953E+01 4.7540E+01 -3.4212E+01 9.9491E+00 S9 2.6644E-01 -3.6597E+00 1.8671E+01 -4.6384E+01 6.1238E+01 -4.1272E+01 1.1165E+01 S10 1.6504E-01 -7.1969E-01 3.1338E+00 -7.1684E+00 8.6636E+00 -5.3208E+00 1.3805E+00 S11 3.4572E-01 -5.4936E-01 -1.9741E+00 5.4211E+00 -6.6722E+00 4.1907E+00 -1.0233E+00 S12 1.1107E+00 -3.2708E+00 4.5846E+00 -3.8300E+00 1.9104E+00 -5.2027E-01 5.9045E-02 S13 -7.8809E-01 -8.7151E-01 3.0490E+00 -3.3712E+00 1.8899E+00 -5.4081E-01 6.2692E-02 S14 -8.3702E-01 8.7276E-01 -5.6122E-01 2.3169E-01 -5.8571E-02 6.6735E-03 0.0000E+00

[0132] Table 6

[0133] Figure 6A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 6B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 6D The 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. 6A to 6D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0134] Example 4

[0135] The following reference Figures 7 to 8D An optical imaging lens according to Example 4 of the present application is described. Figure 7 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0136] 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.

[0137] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0138] In this embodiment, the total effective focal length f of the optical imaging lens is 2.64 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 6.28 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 2.93 mm, the maximum field of view FOV of the optical imaging lens is 112.1°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.20.

[0139] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness and focal length are all millimeters (mm).

[0140]

[0141]

[0142] Table 7

[0143] 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 all 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, 10 、A 12 、A 14 and A 16 .

[0144] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.8592E-01 -1.2958E-01 8.1495E-02 -3.2891E-02 5.7506E-03 0.0000E+00 0.0000E+00 S2 3.5855E-01 -7.9115E-02 2.0771E-02 3.5163E-01 -1.6438E-01 0.0000E+00 0.0000E+00 S3 2.9600E-02 -2.6620E-02 -8.1132E-02 6.8422E-02 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.7891E-01 1.7439E-01 -2.9475E-01 2.2335E-01 -5.3608E-02 0.0000E+00 0.0000E+00 S5 -2.8573E-01 1.0936E-01 6.5046E-02 -4.3099E-01 5.0290E-01 -1.6649E-01 0.0000E+00 S6 -1.4059E-01 7.7360E-02 -3.1358E-02 -9.8833E-03 1.3196E-02 0.0000E+00 0.0000E+00 S7 -2.8892E-02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -2.1995E-01 6.4674E-01 -9.9908E-01 8.8258E-01 -4.3471E-01 1.1078E-01 -1.1300E-02 S9 -4.7182E-01 1.2658E+00 -1.7958E+00 1.5027E+00 -7.1478E-01 1.7722E-01 -1.7700E-02 S10 -3.1343E-02 1.5653E-01 -2.4579E-01 1.9334E-01 -7.6720E-02 1.4856E-02 -1.1234E-03 S11 5.4917E-01 -7.2155E-01 5.5434E-01 -3.2558E-01 1.2730E-01 -2.6957E-02 2.2890E-03 S12 4.4634E-01 -4.5446E-01 2.1432E-01 -5.6370E-02 8.2203E-03 -5.5243E-04 5.7542E-06 S13 -2.5576E-01 -9.8166E-02 1.5435E-01 -6.8592E-02 1.4981E-02 -1.6223E-03 6.7652E-05 S14 -2.4034E-01 1.0073E-01 -2.1961E-02 2.5654E-03 -1.5956E-04 4.2909E-06 0.0000E+00

[0145] Table 8

[0146] Figure 8A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 8BThe astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field 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. Figure 8D The 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. Figures 8A to 8D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0147] Example 5

[0148] The following reference Figures 9 to 10D The optical imaging lens according to Example 5 of the present application is described. Figure 9 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0149] like Figure 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.

[0150] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from an object sequentially passes through surfaces S1 to S16 and is ultimately imaged on an imaging surface S17.

[0151] In this embodiment, the total effective focal length f of the optical imaging lens is 1.98 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 4.62 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 2.25 mm, the maximum field of view FOV of the optical imaging lens is 112.1°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.40.

[0152] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness and focal length are all millimeters (mm).

[0153]

[0154] Table 9

[0155] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are all 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 and A 16 .

[0156]

[0157]

[0158] Table 10

[0159] Figure 10A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 10B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 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. Figure 10D The 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. 10A to 10D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0160] Example 6

[0161] The following reference Figures 11 to 12D The optical imaging lens according to Example 6 of the present application is described. Figure 11 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0162] like Figure 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.

[0163] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object sequentially passes through surfaces S1 to S16 and is ultimately imaged on imaging surface S17.

[0164] In this embodiment, the total effective focal length f of the optical imaging lens is 1.57 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S17 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S17 is ImgH is 1.80 mm, the maximum field of view FOV of the optical imaging lens is 112.1°, and the ratio of the total effective focal length f of the optical imaging lens to the entrance pupil diameter EPD of the optical imaging lens is f / EPD is 2.05.

[0165] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness and focal length are all millimeters (mm).

[0166]

[0167]

[0168] Table 11

[0169] In Example 6, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are all 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 and A 16 .

[0170] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.4539E-01 -1.1542E+00 1.5391E+00 -1.3134E+00 5.2862E-01 0.0000E+00 0.0000E+00 S2 1.3219E+00 -1.6550E+00 6.7270E+00 -1.6450E+01 2.5910E+01 0.0000E+00 0.0000E+00 S3 3.4739E-01 -8.8624E-01 6.0440E-01 -7.5374E-01 0.0000E+00 0.0000E+00 0.0000E+00 S4 -1.5257E+00 6.4830E+00 -2.5804E+01 5.1326E+01 -4.0112E+01 0.0000E+00 0.0000E+00 S5 -1.6472E+00 4.7056E+00 -1.9219E+01 4.5628E+01 -6.8979E+01 5.2610E+01 0.0000E+00 S6 -3.0218E-01 -1.3533E+00 5.2772E+00 -9.6294E+00 6.5060E+00 0.0000E+00 0.0000E+00 S7 3.3647E-02 -1.4003E+00 5.8938E+00 -1.1405E+01 1.0223E+01 -3.4959E+00 0.0000E+00 S8 7.5983E-02 -8.8243E-01 4.6576E+00 -1.2445E+01 1.8619E+01 -1.4790E+01 4.8249E+00 S9 4.0638E-03 1.1065E-01 -1.7924E-01 7.1321E-01 -3.0116E+00 4.4315E+00 -2.1185E+00 S10 -3.8891E-01 3.1007E+00 -1.1439E+01 2.5244E+01 -3.2268E+01 2.2007E+01 -6.1180E+00 S11 1.4969E-01 2.4334E-01 -5.9252E+00 1.5013E+01 -1.8817E+01 1.2154E+01 -3.1394E+00 S12 1.3195E+00 -4.3583E+00 6.9605E+00 -6.5919E+00 3.7169E+00 -1.1429E+00 1.4668E-01 S13 -8.5417E-01 -8.5273E-01 3.5753E+00 -4.4997E+00 2.8682E+00 -9.2889E-01 1.2097E-01 S14 -7.6274E-01 7.9695E-01 -4.5389E-01 1.3385E-01 -1.7094E-02 2.8125E-04 0.0000E+00

[0171] Table 12

[0172] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the focal point of light of different wavelengths passing through the lens. Figure 12BThe astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion values ​​corresponding to different image heights. Figure 12D The 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. 12A to 12D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0173] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0174]

[0175]

[0176] Table 13

[0177] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this 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 negative optical power, wherein the object-side surface and the image-side surface are concave; a second lens having positive optical power and a convex object-side surface; The third lens has a negative optical power, with a convex object-side surface and a concave image-side surface; a fourth lens element having positive optical power, with a convex object-side surface and a convex image-side surface; a fifth lens element having optical power and a convex image-side surface; a sixth lens having negative optical power; and a seventh lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; The curvature radius R1 of the object-side surface of the first lens and the curvature radius R2 of the image-side surface of the first lens satisfy: 0.37≤(R1+R2) / R1≤0.99; The effective focal length f1 of the first lens, the effective focal length f6 of the sixth lens, and the total effective focal length f of the optical imaging lens satisfy the following conditions: -1.0<f / f1+f / f6≤-0.47; The number of lenses having optical power in the optical imaging lens is seven.

2. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the effective focal length f7 of the seventh lens satisfy: 0.44≤f7 / f3≤1.

09.

3. The optical imaging lens according to claim 1, wherein: The combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens and the total effective focal length f of the optical imaging lens satisfy the following: 0.85≤f / f456≤1.

10.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f2 of the second 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: 0.33≤f2 / (R3+|R4|)≤0.

64.

5. The optical imaging lens according to claim 1, wherein: The maximum field of view FOV of the optical imaging lens satisfies: 105°<FOV<120°.

6. The optical imaging lens according to claim 1, wherein: 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 satisfy: 0.5<R5 / (R5+R6)≤0.

70.

7. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens, the curvature radius R7 of the object-side surface of the fourth lens, and the curvature radius R8 of the image-side surface of the fourth lens satisfy: 0.26≤f4 / (R7-R8)≤0.

50.

8. The optical imaging lens according to claim 1, wherein: 0.44≤SAG22 / (SAG22-SAG72)≤0.68, Among them, SAG22 is the on-axis 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 SAG72 is the on-axis distance from the intersection of the image side surface of the seventh lens and the optical axis to the vertex of the effective radius of the image side surface of the seventh lens.

9. The optical imaging lens according to claim 1, wherein: The edge thickness ET1 of the first lens and the maximum effective radius DT12 of the image side surface of the first lens satisfy: 0.43≤ET1 / DT12≤0.

65.

10. The optical imaging lens according to claim 1, wherein: The edge thickness ET6 of the sixth lens and the maximum effective radius DT62 of the image side surface of the sixth lens satisfy: 0.26≤ET6 / DT62≤0.

51.

11. The optical imaging lens according to claim 1, wherein: The edge thickness ET2 of the second lens and the center thickness CT2 of the second lens on the optical axis satisfy: 0.51≤ET2 / CT2≤0.

67.

12. The optical imaging lens according to claim 1, wherein: The center thickness CT4 of the fourth lens on the optical axis and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 0.47≤CT4 / DT42≤0.

90.

13. The optical imaging lens according to claim 1, wherein: The curvature radius R10 of the image-side surface of the fifth lens, the curvature radius R13 of the object-side surface of the seventh lens, and the curvature radius R14 of the image-side surface of the seventh lens satisfy: -1.0<(R13+R14) / R10≤-0.

33.

14. The optical imaging lens according to claim 1, wherein: The center thickness CT1 of the first lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis satisfy: 0.86≤CT1 / CT7≤1.

04.

15. The optical imaging lens according to claim 1, wherein: The center thickness CT3 of the third lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 0.28≤CT3 / (CT5+CT6)≤0.

52.

16. The optical imaging lens according to any one of claims 1 to 15, wherein: 0.45≤(T34+T45+T56) / T12≤0.86, Among them, T12 is the air space between the first lens and the second lens on the optical axis; T34 is the air space between the third lens and the fourth lens on the optical axis; T45 is the air space between the fourth lens and the fifth lens on the optical axis; and T56 is the air space between the fifth lens and the sixth lens on the optical axis.

Images