Optical imaging lens

Abstract

The present application discloses an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens; a second lens with a positive optical power; a third lens, whose image side is concave; a fourth lens; a fifth lens, whose object side is concave; and a sixth lens, whose object side is concave; wherein, half of the maximum field of view of the optical imaging lens, Semi-FOV, satisfies Semi-FOV > 50°; the total effective focal length f of the optical imaging lens and the curvature radius R11 of the object side of the sixth lens satisfy -1.6 < f / R11 < -0.5.

Description

Technical Field

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

[0002] In recent years, with the development of science and technology, consumer electronic products such as smart phones, tablet devices, and wearable devices have been upgraded faster and faster. Moreover, the image software functions and video software functions on consumer electronic products have been continuously developed. A camera module is usually provided on a portable device such as a mobile phone so that the mobile phone has a camera function. The market demand for camera modules applicable to portable electronic products is gradually increasing, and the quality requirements for camera modules are getting higher and higher.

[0003] The number of optical imaging lenses in the camera module is also increasing day by day, usually including an ultra-wide-angle lens, an ultra-clear main camera, and a telephoto lens. The camera module switches lenses in different modes to achieve an ultra-clear shooting function, and combines algorithms to achieve a non-genuine optical "continuous" zoom.

[0004] The rapid development of mobile phone camera modules, especially the popularization of large-size and high-pixel CMOS chips, has imposed more stringent requirements on the imaging quality of optical imaging lenses by mobile phone manufacturers. In addition, with the improvement of the performance and the reduction of the size of CCD and CMOS components, higher requirements have also been put forward for the high imaging quality and miniaturization of the matching optical imaging lenses.

[0005] In order to meet the miniaturization requirements and imaging requirements, an optical imaging lens that can balance a large field of view angle and high imaging quality is needed. Summary of the Invention

[0006] The present application provides an optical imaging lens applicable to portable electronic products, which can at least solve or partially solve the above-mentioned at least one disadvantage in the prior art.

[0007] On the one hand, the present application provides an optical imaging lens, which sequentially includes, from the object side to the image side along the optical axis: a first lens; a second lens with positive optical power; a third lens, whose image side is concave; a fourth lens; a fifth lens, whose object side is concave; and a sixth lens, whose object side is concave; wherein, half of the maximum field of view angle Semi-FOV of the optical imaging lens satisfies Semi-FOV > 50°; the total effective focal length f of the optical imaging lens and the curvature radius R11 of the object side of the sixth lens satisfy -1.6 < f / R11 < -0.5.

[0008] In one embodiment, at least one of the object side of the first lens to the image side of the sixth lens is an aspherical mirror surface.

[0009] In one embodiment, the optical imaging lens further includes a diaphragm; the distance SD on the optical axis from the diaphragm to the image side of the sixth lens and the distance SL on the optical axis from the diaphragm to the imaging surface of the optical imaging lens satisfy 0.5 < SD / SL < 1.0.

[0010] 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 f6 of the sixth lens satisfy -1.4 < f / f6 - f / f1 < -0.4.

[0011] In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f345 of the third, fourth, and fifth lenses satisfy 0.5 < f / f345 < 1.5.

[0012] In one embodiment, the edge thickness ET2 of the second lens and the central thickness CT2 of the second lens on the optical axis satisfy 0.3 < ET2 / CT2 < 0.8.

[0013] In one embodiment, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.2 < ET4 / CT4 < 0.7.

[0014] In one embodiment, the axial distance SAG51 between the intersection of the object side of the fifth lens and the optical axis and the vertex of the effective radius of the object side of the fifth lens and the axial distance SAG42 between the intersection of the image side of the fourth lens and the optical axis and the vertex of the effective radius of the image side of the fourth lens satisfy 0.8 < SAG51 / SAG42 < 1.3.

[0015] In one embodiment, the axial distance SAG11 between the intersection of the object side of the first lens and the optical axis and the vertex of the effective radius of the object side of the first lens and the axial distance SAG12 between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens satisfy 0.4 < SAG12 / (SAG11 + SAG12) < 1.5.

[0016] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy 0.8 < CT1 / ET1 < 1.3.

[0017] In one embodiment, the radius of curvature R3 of the object side of the second lens and the radius of curvature R6 of the image side of the third lens satisfy 0.2 < R3 / (R3 + R6) < 1.0.

[0018] In one embodiment, the radius of curvature R4 of the image side of the second lens and the radius of curvature R8 of the image side of the fourth lens satisfy 0.2 < R4 / (R4 + R8) < 1.0.

[0019] In one embodiment, the central thickness CT2 of the second lens on the optical axis and the spacing distance T12 between the first lens and the second lens on the optical axis satisfy 0.7 < CT2 / T12 < 1.2.

[0020] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the sum ΣAT of the spacing distances between any two adjacent lenses among the first lens to the sixth lens on the optical axis satisfy 0.2 < (CT5 + CT6) / ΣAT < 0.7.

[0021] In one embodiment, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy 0.3 < CT3 / ET3 < 0.8.

[0022] In one embodiment, the first lens has a negative optical power; the object side surface of the second lens is convex, and the image side surface of the second lens is convex; the image side surface of the fourth lens is convex; the image side surface of the fifth lens is convex; the sixth lens has a negative optical power, and its image side surface is concave.

[0023] The second aspect of the present application provides another optical imaging lens, which sequentially includes, along the optical axis from the object side to the image side: a first lens; a second lens with a positive optical power; a third lens, whose image side surface is concave; a fourth lens; a fifth lens, whose object side surface is concave; and a sixth lens, whose object side surface is concave; wherein, half of the maximum field of view Semi-FOV of the optical imaging lens satisfies Semi-FOV > 50°; the central thickness CT2 of the second lens on the optical axis and the spacing distance T12 between the first lens and the second lens on the optical axis satisfy 0.7 < CT2 / T12 < 1.2

[0024] In one embodiment, the optical imaging lens further includes a diaphragm; the distance SD on the optical axis from the diaphragm to the image side surface of the sixth lens and the distance SL on the optical axis from the diaphragm to the imaging surface of the optical imaging lens satisfy 0.5 < SD / SL < 1.0.

[0025] 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 f6 of the sixth lens satisfy -1.4 < f / f6 - f / f1 < -0.4.

[0026] In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy 0.5 < f / f345 < 1.5.

[0027] In one embodiment, the edge thickness ET2 of the second lens and the central thickness CT2 of the second lens on the optical axis satisfy 0.3 < ET2 / CT2 < 0.8.

[0028] In one embodiment, the edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.2 < ET4 / CT4 < 0.7.

[0029] In one embodiment, the axial distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the vertex of the effective radius of the object side surface of the fifth lens and the axial distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image side surface of the fourth lens satisfy 0.8 < SAG51 / SAG42 < 1.3.

[0030] In one embodiment, the axial distance SAG11 between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens and the axial distance SAG12 between the intersection of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens satisfy 0.4 < SAG12 / (SAG11 + SAG12) < 1.5.

[0031] In one embodiment, the central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy 0.8 < CT1 / ET1 < 1.3.

[0032] In one embodiment, the curvature radius R3 of the object side surface of the second lens and the curvature radius R6 of the image side surface of the third lens satisfy 0.2 < R3 / (R3 + R6) < 1.0.

[0033] In one embodiment, the curvature radius R4 of the image side surface of the second lens and the curvature radius R8 of the image side surface of the fourth lens satisfy 0.2 < R4 / (R4 + R8) < 1.0.

[0034] In one embodiment, the total effective focal length f of the optical imaging lens and the curvature radius R11 of the object side surface of the sixth lens satisfy -1.6 < f / R11 < -0.5.

[0035] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the sum ΣAT of the axial spacing distances between any two adjacent lenses among the first lens to the sixth lens on the optical axis satisfy 0.2 < (CT5 + CT6) / ΣAT < 0.7.

[0036] In one embodiment, the central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy 0.3 < CT3 / ET3 < 0.8.

[0037] In one embodiment, the first lens has a negative focal power; the object side surface of the second lens is convex, and the image side surface of the second lens is convex; the image side surface of the fourth lens is convex; the image side surface of the fifth lens is convex; the sixth lens has a negative focal power, and its image side surface is concave.

[0038] This application uses six lenses. By reasonably allocating the focal power, surface shape, central thickness of each lens, and the on-axis spacing between each lens, etc., the above optical imaging lens has at least one beneficial effect such as miniaturization, large field of view angle, high imaging quality, and easy processing. Brief Description of the Drawings

[0039] In conjunction with the drawings, through the following detailed description of non-limiting embodiments, other features, objects, and advantages of this application will become more apparent. In the drawings:

[0040] Figure 1 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of this application; Figures 2A to 2D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1;

[0041] Figure 3 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of this application; Figures 4A to 4D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 2;

[0042] Figure 5 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of this application; Figures 6A to 6D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 3;

[0043] Figure 7 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of this application; Figures 8A to 8D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 4;

[0044] Figure 9 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of this application; Figures 10A to 10D Respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 5;

[0045] Figure 11 Shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of this application; Figures 12A to 12DThe axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens of Embodiment 6 are respectively shown. Detailed Embodiment

[0046] To better understand 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 only descriptions of exemplary embodiments of the present application and do not 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.

[0047] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0048] In the drawings, for the sake of convenience of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0049] 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 to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.

[0050] It should also be understood that the terms "comprise", "comprising", "have", "including", and / or "including having", 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 their combinations. In addition, when an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features rather than an individual element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0052] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The following will describe this application in detail with reference to the drawings and in conjunction with the embodiments.

[0053] The features, principles, and other aspects of this application will be described in detail below.

[0054] The optical imaging lens according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are arranged in sequence along the optical axis from the object side to the image side. An air gap may be provided between any two adjacent lenses among the first lens to the sixth lens.

[0055] In the exemplary embodiment, the first lens has a positive or negative optical power; the second lens has a positive optical power; the third lens has a positive or negative optical power, and its image side is concave; the fourth lens has a positive or negative optical power; the fifth lens has a positive or negative optical power, and its object side is concave; the sixth lens has a positive or negative optical power, and its object side is concave. By reasonably controlling the positive and negative distribution of the optical power of each component of the lens and the curvature of the lens surface type, the low-order aberrations of the lens are effectively balanced, and the optical imaging lens obtains good imaging ability.

[0056] In the exemplary embodiment, the first lens has a negative optical power.

[0057] In the exemplary embodiment, the object side of the second lens is convex, and the image side of the second lens is convex.

[0058] In the exemplary embodiment, the image side of the fourth lens is convex.

[0059] In the exemplary embodiment, the image side of the fifth lens is convex.

[0060] In the exemplary embodiment, the sixth lens has a negative optical power, and its image side is concave. By reasonably distributing the optical power of each lens, it is beneficial to ensure that the optical imaging lens has high imaging quality and has processing feasibility and stability.

[0061] In an exemplary embodiment, the above optical imaging lens may further include at least one aperture. The aperture can be disposed at an appropriate position as needed. For example, it can be disposed between the first lens and the second lens. Optionally, the above 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.

[0062] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula Semi-FOV > 50°, where Semi-FOV is half of the maximum field of view angle of the optical imaging lens. By controlling the range of the maximum semi-field of view angle, it is beneficial to ensure that the optical imaging lens can obtain a larger range of object-side angles. More specifically, Semi-FOV satisfies 53° < Semi-FOV < 60°.

[0063] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -1.6 < f / R11 < -0.5, where f is the total effective focal length of the optical imaging lens, and R11 is the curvature radius of the object side surface of the sixth lens. By controlling the ratio of the total effective focal length to the curvature radius of the object side surface of the sixth lens, it is beneficial to the processing and forming of the sixth lens. More specifically, f and R11 can satisfy -1.40 < f / R11 < -0.52.

[0064] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.5 < SD / SL < 1.0, where SD is the distance from the aperture to the image side surface of the sixth lens on the optical axis, and SL is the distance from the aperture to the imaging surface of the optical imaging lens on the optical axis. Constraining the ratio of the distance from the aperture to the image side surface of the last lens to the distance to the imaging surface is beneficial to ensuring the rationality of the shape of the optical imaging lens and is beneficial to ensuring the processability of the optical imaging lens. More specifically, SD and SL can satisfy 0.75 < SD / SL < 0.90.

[0065] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -1.4 < f / f6 - f / f1 < -0.4, where f is the total effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, and f6 is the effective focal length of the sixth lens. By controlling this conditional formula, it is beneficial to ensure that the spherical aberration contributions of the first lens and the sixth lens are within a reasonable range, and it is beneficial to obtaining high-quality imaging in the axial field of view of the optical imaging lens. More specifically, f, f1, and f6 can satisfy -1.30 < f / f6 - f / f1 < -0.41.

[0066] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.5 < f / f345 < 1.5, where f is the total effective focal length of the optical imaging lens, and f345 is the combined focal length of the third lens, the fourth lens, and the fifth lens. By controlling this conditional formula, it is beneficial to reasonably distribute the effective focal lengths of the third lens, the fourth lens, and the fifth lens, and further beneficial to distributing the optical power of the entire optical imaging lens and reducing the tolerance sensitivity of each lens. More specifically, f and f345 may satisfy 0.70 < f / f345 < 1.25.

[0067] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.3 < ET2 / CT2 < 0.8, where ET2 is the edge thickness of the second lens, and CT2 is the central thickness of the second lens on the optical axis. By controlling the ratio of the edge thickness to the central thickness of the second lens, it is beneficial to the accuracy and stability of the processing and shaping of the second lens. More specifically, ET2 and CT2 may satisfy 0.40 < ET2 / CT2 < 0.55.

[0068] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.2 < ET4 / CT4 < 0.7, where ET4 is the edge thickness of the fourth lens, and CT4 is the central thickness of the fourth lens on the optical axis. By controlling the ratio of the edge thickness to the central thickness of the fourth lens, it is beneficial to the accuracy and stability of the processing and shaping of the fourth lens. More specifically, ET4 and CT4 may satisfy 0.25 < ET4 / CT4 < 0.50.

[0069] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.8 < SAG51 / SAG42 < 1.3, where SAG51 is the axial distance between the intersection of the object side of the fifth lens and the optical axis and the vertex of the effective radius of the object side of the fifth lens, and SAG42 is the axial distance between the intersection of the image side of the fourth lens and the optical axis and the vertex of the effective radius of the image side of the fourth lens. By controlling the ratio of the sagittal height of the object side of the fifth lens to the sagittal height of the image side of the fourth lens, it is beneficial to controlling the bending degree of these two lenses, and further beneficial to the processing of the lenses and ensuring that the optical imaging lens has high imaging quality. More specifically, SAG51 and SAG42 may satisfy 0.88 < SAG51 / SAG42 < 1.08.

[0070] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.4 < SAG12 / (SAG11 + SAG12) < 1.5, where SAG11 is the axial distance between the intersection of the object side surface of the first lens and the optical axis and the vertex of the effective radius of the object side surface of the first lens, and SAG12 is the axial distance between the intersection of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens. By controlling this conditional formula, it is beneficial to control the sag heights of the two mirror surfaces of the first lens, and thus beneficial to the processing and shaping of the first lens. More specifically, SAG11 and SAG12 can satisfy 0.45 < SAG12 / (SAG11 + SAG12) < 0.55.

[0071] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.8 < CT1 / ET1 < 1.3, where CT1 is the central thickness of the first lens on the optical axis and ET1 is the edge thickness of the first lens. By controlling the ratio of the central thickness to the edge thickness of the first lens, it is beneficial to the accuracy and stability of the processing and shaping of the first lens. Specifically, CT1 and ET1 can satisfy 0.95 < CT1 / ET1 < 1.25.

[0072] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < R3 / (R3 + R6) < 1.0, where R3 is the radius of curvature of the object side surface of the second lens and R6 is the radius of curvature of the image side surface of the third lens. By controlling 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 third lens to satisfy this conditional formula, the shape of the lens can be effectively constrained. Furthermore, the aberration caused by the aperture can be improved, and the imaging quality of the optical imaging lens can be enhanced. More specifically, R3 and R6 can satisfy 0.50 < R3 / (R3 + R6) < 0.75.

[0073] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.2 < R4 / (R4 + R8) < 1.0, where R4 is the radius of curvature of the image side surface of the second lens and R8 is the radius of curvature of the image side surface of the fourth lens. By controlling the radius of curvature of the image side surface of the second lens and the radius of curvature of the image side surface of the fourth lens to satisfy this conditional formula, the shape of the lens can be effectively constrained. Furthermore, the aberration caused by the aperture can be improved, and the imaging quality of the optical imaging lens can be enhanced. More specifically, R4 and R8 can satisfy 0.60 < R4 / (R4 + R8) < 0.80.

[0074] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.7 < CT2 / T12 < 1.2, where CT2 is the central thickness of the second lens on the optical axis, and T12 is the axial spacing between the first lens and the second lens. By controlling the ratio of the central thickness of the second lens to the air gap between the first lens and the second lens, it is beneficial to correct the axial chromatic aberration, thereby improving the imaging quality of the optical imaging lens. More specifically, CT2 and T12 may satisfy 0.72 < CT2 / T12 < 1.10.

[0075] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.2 < (CT5 + CT6) / ΣAT < 0.7, where CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and ΣAT is the sum of the axial spacings between any two adjacent lenses among the first lens to the sixth lens. Exemplarily, ΣAT = T12 + T23 + T34 + T45 + T56. By controlling this conditional formula, it is beneficial to shorten the overall length of the optical imaging lens, and at the same time, it is beneficial to control the central thicknesses of the fifth lens and the sixth lens within a reasonable range, thereby maintaining the stability of the lens structure. More specifically, CT5, CT6, and ΣAT may satisfy 0.38 < (CT5 + CT6) / ΣAT < 0.62.

[0076] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0.3 < CT3 / ET3 < 0.8, where CT3 is the central thickness of the third lens on the optical axis, and ET3 is the edge thickness of the third lens. By controlling the ratio of the central thickness of the third lens to its edge thickness, it is beneficial to the processing and forming of the third lens. More specifically, CT3 and ET3 may satisfy 0.55 < CT3 / ET3 < 0.70.

[0077] The optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the six lenses described above. By reasonably distributing the optical power, surface shape, central thickness of each lens, and the axial spacing between each lens, etc., the volume of the imaging lens can be effectively reduced, the sensitivity of the imaging lens can be decreased, and the processability of the imaging lens can be improved, making the optical imaging lens more conducive to production and processing and applicable to portable electronic products. At the same time, the optical imaging lens of the present application also has excellent optical properties such as miniaturization, large field of view, high imaging quality, and easy processing.

[0078] In an embodiment of the present application, at least one of the lens surfaces of each lens is an aspherical lens surface, that is, at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical lens surface. The characteristics of an aspherical lens are that the curvature continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging 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 of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical lens surface. Optionally, both the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are aspherical lens surfaces.

[0079] 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 six lenses are described as an example in the embodiment, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0080] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0081] Example 1

[0082] The following refers to Figures 1 to 2D Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 A schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0083] As Figure 1 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0084] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a positive optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0085] Table 1 shows the basic parameter table of the optical imaging lens of Example 1, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0086]

[0087] Table 1

[0088] In Example 1, the value of the total effective focal length f of the optical imaging lens is 2.18 mm, the value of the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S15 is 5.10 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15, ImgH, is 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.23, and the value of half of the maximum field of view, Semi-FOV, is 58.5°.

[0089] In Example 1, the object side and the image side of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0090]

[0091] where x is the sagitta, the distance from the vertex of the aspherical surface to the aspherical surface along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order term coefficients A4, A6, A8, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A22 and A 24 。

[0092] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.4788E-01 -3.6620E-02 3.7508E-04 -3.9412E-03 -2.7716E-04 1.8442E-05 9.7531E-05 4.1211E-05 -9.8987E-06 S2 2.3120E-01 1.0305E-02 2.7892E-03 -3.2733E-04 -3.9373E-04 -1.4285E-04 -4.0084E-05 -1.8222E-06 6.9449E-06 S3 -1.3173E-02 -2.5287E-03 -3.9898E-04 -7.8813E-05 -2.6208E-05 -5.3134E-06 -2.8519E-06 1.2634E-06 -1.8292E-06 S4 -1.4519E-01 1.7830E-03 -8.3978E-03 7.4067E-04 -9.6437E-04 5.1740E-05 -1.2272E-04 8.0336E-07 -1.4695E-05 S5 -2.7476E-01 2.9804E-02 -6.7457E-03 3.4757E-03 -1.3701E-03 2.2024E-04 -2.2570E-04 3.4013E-05 -4.6108E-05 S6 -2.2311E-01 2.0375E-02 -3.0643E-03 1.2415E-03 -3.0513E-04 -5.0614E-05 -1.3451E-05 -4.9241E-06 -5.0411E-07 S7 2.3652E-01 -1.1226E-02 -3.2257E-04 -1.5378E-03 -1.7904E-04 -5.7286E-05 -3.7153E-05 7.5325E-05 1.1809E-05 S8 4.5474E-01 -1.7022E-02 3.1804E-02 -6.4114E-03 -3.3001E-03 -7.1464E-04 -1.0730E-04 9.5584E-05 1.5923E-04 S9 -3.8145E-01 -8.6184E-02 2.0432E-03 1.9679E-02 4.7325E-04 4.1575E-04 -1.3459E-03 -8.3960E-04 -1.4161E-04 S10 -4.6255E-03 -7.3944E-04 -4.5710E-02 4.3040E-02 -2.9372E-02 1.2636E-02 -2.6476E-03 3.8686E-04 1.4808E-04 S11 4.8718E-01 3.2535E-02 -5.9895E-02 4.8382E-02 -2.6001E-02 7.0868E-03 1.1468E-03 -1.7773E-03 6.2050E-04 S12 -2.8031E+00 5.0667E-01 -1.0098E-01 7.0816E-02 -3.0645E-02 7.6673E-03 -4.5640E-03 3.2566E-03 6.5205E-04

[0093] Table 2-1

[0094] Face number A22 A24 S1 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 S11 7.6159E-06 1.4143E-07 S12 0.0000E+00 0.0000E+00

[0095] Table 2-2

[0096] Figure 2A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of the converging focal points of light rays with different wavelengths after passing through the lens. Figure 2B shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude values corresponding to different field angles. Figure 2D shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens. According to Figures 2A to 2D it can be seen that the optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0097] Example 2

[0098] The following refers to Figures 3 to 4D to describe the optical imaging lens according to Embodiment 2 of the present application. In this embodiment and the following embodiments, for the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted. Figure 3 shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application.

[0099] As Figure 3 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0100] The first lens E1 has a negative optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is concave, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0101] In Embodiment 2, the value of the total effective focal length f of the optical imaging lens is 2.32 mm, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S15 is 5.41 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15 is ImgH = 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.23, and the value of half of the maximum field of view is Semi - FOV = 55.6°.

[0102] Table 3 shows the basic parameter table of the optical imaging lens of Embodiment 2, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 4 shows the higher - order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, and each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0103]

[0104] Table 3

[0105]

[0106]

[0107] Table 4

[0108] Figure 4A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of the convergence focal points of light rays of different wavelengths after passing through the lens. Figure 4B shows the astigmatism curve of the optical imaging lens of Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C shows the distortion curve of the optical imaging lens of Embodiment 2, which represents the distortion magnitude values corresponding to different field of view angles. Figure 4D shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According toFigures 4A to 4D It can be seen that the optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0109] Example 3

[0110] The following refers to 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 the optical imaging lens according to Embodiment 3 of the present application is shown.

[0111] As Figure 5 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0112] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is convex, and its image side S8 is convex. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0113] In Embodiment 3, the value of the total effective focal length f of the optical imaging lens is 2.32 mm, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S15 is 5.63 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15, ImgH, is 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.23, and the value of half of the maximum field of view, Semi-FOV, is 53.7°.

[0114] Table 5 shows the basic parameter table of the optical imaging lens of Embodiment 3, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 6 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0115]

[0116]

[0117] Table 5

[0118] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.6807E-01 -1.8132E-02 6.1708E-03 -1.7583E-03 -1.7722E-05 -1.6521E-04 -3.6423E-05 -1.7485E-05 -6.3078E-06 S2 2.8595E-01 2.0597E-02 8.9363E-03 2.3378E-03 8.9990E-04 3.3575E-04 1.3895E-04 4.7809E-05 1.9833E-05 S3 -1.2559E-02 -1.7280E-03 -1.8547E-04 -3.0726E-05 -4.8047E-06 -2.5805E-06 -1.0024E-07 3.3712E-07 -1.9036E-07 S4 -1.2022E-01 5.5535E-03 -5.2836E-03 8.9209E-04 -5.7393E-04 1.1779E-04 -5.9905E-05 1.4874E-05 -4.9944E-06 S5 -2.2564E-01 2.2178E-02 -4.8949E-03 2.1840E-03 -7.3078E-04 2.3317E-04 -7.9835E-05 3.1341E-05 -7.1672E-06 S6 -2.0209E-01 1.6881E-02 -3.1714E-03 1.2411E-03 -3.0494E-04 8.8312E-05 -1.3305E-05 -3.9677E-07 4.2901E-06 S7 9.8145E-02 -7.2033E-03 -2.9885E-03 2.5447E-04 -3.7149E-05 8.2366E-05 5.7996E-05 2.2499E-05 1.1897E-05 S8 4.3354E-01 -2.3355E-02 2.0518E-02 -5.8991E-03 -8.4236E-04 -4.9619E-05 -1.3253E-04 1.6584E-04 -4.3044E-05 S9 -3.9993E-01 -3.0372E-02 2.0845E-02 8.8569E-03 -3.6452E-03 1.9525E-03 -7.1008E-04 -4.7783E-05 -2.1982E-04 S10 -1.1451E-01 6.6922E-02 -4.2290E-02 2.9149E-02 -1.1830E-02 6.6646E-03 -5.5913E-03 1.9849E-03 -2.1017E-03 S11 5.1437E-01 4.7637E-02 -7.9378E-02 4.8260E-02 -2.2036E-02 6.7239E-03 -2.6145E-04 -1.1608E-03 3.3996E-04 S12 -2.6133E+00 4.8970E-01 -1.4884E-01 4.7665E-02 -2.3306E-02 7.7783E-03 -3.4357E-03 4.4430E-04 -1.6242E-04

[0119] Table 6

[0120] Figure 6A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the convergence focal points of light rays with different wavelengths after passing through the lens. Figure 6B shows the astigmatism curve of the optical imaging lens of Embodiment 3, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 6C shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different field angles. Figure 6D shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 6A to 6D it can be seen that the optical imaging lens given in Embodiment 3 can achieve good imaging quality.

[0121] Example 4

[0122] The following refers to Figures 7 to 8D describes the optical imaging lens according to Embodiment 4 of the present application. Figure 7 shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present application.

[0123] As Figure 7 shown, the optical imaging lens sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0124] The first lens E1 has a negative optical power, its object side surface S1 is concave, and its image side surface S2 is concave. The second lens E2 has a positive optical power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has a negative optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a positive optical power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has a negative optical power, its object side surface S11 is concave, and its image side surface S12 is convex. The filter E7 has an object side surface S13 and an image side surface S14. The optical imaging lens has an imaging surface S15, and the light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0125] In Embodiment 4, the value of the total effective focal length f of the optical imaging lens is 2.14 mm, the value of the on-axis distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S15 is 5.53 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15, ImgH, is 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.23, and the value of half of the maximum field of view, Semi-FOV, is 54.9°.

[0126] Table 7 shows the basic parameter table of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 8 shows the high-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 4, where each aspherical surface type can be defined by formula (1) given in Embodiment 1 above.

[0127]

[0128] Table 7

[0129] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 3.5056E-01 -1.9809E-02 4.6237E-03 -5.5178E-04 1.7049E-04 1.1280E-05 7.2594E-07 5.9577E-06 1.6285E-06 S2 2.1072E-01 9.1739E-03 3.0818E-03 2.8213E-04 3.7167E-05 2.3154E-06 3.8043E-06 8.7623E-06 9.7708E-06 S3 -1.1853E-02 -2.0913E-03 -3.2393E-04 -7.0051E-05 -1.5059E-05 -5.7417E-06 -1.5265E-06 -1.3895E-06 8.0081E-07 S4 -1.3408E-01 1.6092E-04 -6.0736E-03 4.5550E-04 -5.3117E-04 1.7395E-05 -5.6106E-05 3.5744E-07 -6.2921E-06 S5 -2.3688E-01 1.8947E-02 -4.9895E-03 1.9443E-03 -3.9536E-04 9.7073E-05 -5.1771E-05 1.7524E-05 5.2857E-06 S6 -2.0705E-01 1.8152E-02 -3.0268E-03 1.3871E-03 -1.0713E-04 -1.8292E-05 3.4224E-06 -2.0952E-05 1.4833E-05 S7 1.7838E-01 -1.6086E-02 1.1868E-03 1.1205E-03 1.0016E-03 9.4461E-04 7.1473E-04 2.6409E-04 1.5020E-04 S8 5.0476E-01 -3.0537E-02 2.2501E-02 -6.2975E-03 -1.9475E-04 -2.4673E-03 8.1637E-04 -8.7268E-05 1.1132E-04 S9 -2.9528E-01 -2.7519E-02 8.0099E-03 2.9509E-03 -7.6524E-03 -6.1953E-04 9.0189E-03 3.5430E-03 1.6769E-03 S10 -5.9383E-01 2.2507E-01 -2.4179E-02 4.3491E-02 -1.6986E-02 1.1523E-02 -8.2218E-03 -8.6287E-03 -3.6943E-04 S11 4.5915E-01 -3.4453E-01 -1.0866E-02 -1.5248E-02 7.7227E-02 1.3810E-02 -3.2798E-02 -4.3868E-02 -1.2985E-02 S12 -9.7090E-01 -8.0956E-01 -1.3452E-01 -1.9111E-01 5.2909E-02 2.7303E-02 7.7549E-02 3.0466E-02 1.9912E-02

[0130] Table 8

[0131] Figure 8A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 8B shows the astigmatism curve of the optical imaging lens of Embodiment 4, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C shows the distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different field of view angles. Figure 8D shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens. According to Figures 8A to 8D it can be seen that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0132] Example 5

[0133] The following refers to Figures 9 to 10D describes the optical imaging lens according to Embodiment 5 of the present application. Figure 9 shows the structural schematic diagram of the optical imaging lens according to Embodiment 5 of the present application.

[0134] As Figure 9 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0135] The first lens E1 has a negative optical power, with its object side S1 being concave and its image side S2 being concave. The second lens E2 has a positive optical power, with its object side S3 being convex and its image side S4 being convex. The third lens E3 has a negative optical power, with its object side S5 being concave and its image side S6 being concave. The fourth lens E4 has a positive optical power, with its object side S7 being concave and its image side S8 being convex. The fifth lens E5 has a positive optical power, with its object side S9 being concave and its image side S10 being convex. The sixth lens E6 has a negative optical power, with its object side S11 being concave and its image side S12 being concave. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from an object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0136] In Embodiment 5, the value of the total effective focal length f of the optical imaging lens is 2.15 mm, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S15 is 5.11 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15 is ImgH = 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.23, and the value of half of the maximum field of view is Semi - FOV = 58.6°.

[0137] Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 10 shows the high - order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 5, and each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0138]

[0139] Table 9

[0140]

[0141]

[0142] Table 10

[0143] Figure 10A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of the convergence focal points of light rays of different wavelengths after passing through the lens. Figure 10B shows the astigmatism curve of the optical imaging lens of Embodiment 5, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 10C shows the distortion curve of the optical imaging lens of Embodiment 5, which represents the distortion magnitude values corresponding to different field of view angles. Figure 10D shows the lateral chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of different image heights on the imaging surface after light rays pass through the lens. According toFigures 10A to 10D It can be seen that the optical imaging lens given in Embodiment 5 can achieve good imaging quality.

[0144] Example 6

[0145] The following refers to Figures 11 to 12D the optical imaging lens according to Embodiment 6 of the present application is described. Figure 11 FIG. shows a schematic structural diagram of the optical imaging lens according to Embodiment 6 of the present application.

[0146] As Figure 11 shown, the optical imaging lens sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7.

[0147] The first lens E1 has a negative optical power, its object side S1 is concave, and its image side S2 is concave. The second lens E2 has a positive optical power, its object side S3 is convex, and its image side S4 is convex. The third lens E3 has a negative optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S7 is convex, and its image side S8 is convex. The fifth lens E5 has a positive optical power, its object side S9 is concave, and its image side S10 is convex. The sixth lens E6 has a negative optical power, its object side S11 is concave, and its image side S12 is concave. The filter E7 has an object side S13 and an image side S14. The optical imaging lens has an imaging surface S15, and light from the object sequentially passes through the surfaces S1 to S14 and finally forms an image on the imaging surface S15.

[0148] In Embodiment 6, the value of the total effective focal length f of the optical imaging lens is 2.18 mm, the on-axis distance TTL from the object side S1 of the first lens E1 to the imaging surface S15 is 5.20 mm, the value of half of the diagonal length of the effective pixel region on the imaging surface S15, ImgH, is 2.88 mm, the ratio f / EPD of the total effective focal length f to the entrance pupil diameter EPD is 2.22, and the value of half of the maximum field of view, Semi-FOV, is 57.9°.

[0149] Table 11 shows the basic parameter table of the optical imaging lens of Embodiment 6, where the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). Table 12 shows the higher-order term coefficients of the aspherical mirror surfaces that can be used in Embodiment 6, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0150]

[0151]

[0152] Table 11

[0153] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 4.5747E-01 -2.8689E-02 3.9460E-03 -2.7725E-03 -4.7642E-05 -1.2727E-04 1.0961E-05 1.2357E-06 1.6379E-05 S2 2.2456E-01 1.1417E-02 4.0995E-03 4.9355E-04 8.2424E-05 2.1651E-05 2.5441E-06 -1.0095E-05 2.7701E-06 S3 -1.2934E-02 -2.2417E-03 -3.1142E-04 -6.2458E-05 -1.5487E-05 -4.8376E-06 -2.0242E-06 -8.7804E-07 -3.2929E-08 S4 -1.4457E-01 1.8457E-03 -7.9356E-03 6.2328E-04 -9.3767E-04 5.2718E-05 -1.1135E-04 1.0386E-05 -1.0020E-05 S5 -2.7401E-01 3.1877E-02 -5.9875E-03 3.3095E-03 -1.1546E-03 3.8807E-04 -1.2549E-04 6.2721E-05 -3.0280E-05 S6 -2.3155E-01 1.9321E-02 -3.4420E-03 1.3991E-03 -1.7373E-04 1.3522E-04 6.0869E-05 2.6806E-05 2.1431E-05 S7 1.9401E-01 -1.1545E-02 -5.5726E-05 -8.7955E-04 -2.0852E-04 -2.3966E-04 -1.2982E-06 -3.2035E-05 6.1933E-06 S8 4.5647E-01 -1.4984E-02 3.0142E-02 -7.3035E-03 -9.0828E-04 -1.8163E-03 2.6634E-04 -2.7189E-05 1.8626E-04 S9 -4.1592E-01 -1.0165E-01 -2.7044E-03 1.7071E-02 4.7998E-03 -1.6384E-03 -1.0098E-03 -9.3135E-04 8.8242E-05 S10 2.1456E-02 2.1179E-02 -4.6276E-02 4.2791E-02 -2.5796E-02 1.3825E-02 -4.0048E-03 2.3144E-04 1.0045E-03 S11 5.0018E-01 3.7755E-02 -6.7817E-02 4.0911E-02 -1.6873E-02 6.6844E-03 -2.6359E-03 7.0955E-04 -1.2817E-04 S12 -2.8871E+00 4.5692E-01 -1.3974E-01 5.5487E-02 -1.2342E-02 1.1665E-02 -4.1960E-03 2.6730E-04 -1.4134E-04

[0154] Table 12

[0155] Figure 12A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 12B The astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 12C The distortion curve of the optical imaging lens of Example 6 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 12D The lateral chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens. According to Figures 12A to 12D It can be seen that the optical imaging lens given in Example 6 can achieve good imaging quality.

[0156] In summary, Examples 1 to 6 respectively satisfy the relationships shown in Table 13.

[0157] Conditional / Example 1 2 3 4 5 6 f / R11 -0.68 -0.54 -0.55 -1.34 -0.63 -0.62 SD / SL 0.76 0.79 0.80 0.87 0.81 0.79 f / f6 - f / f1 -0.99 -1.07 -1.02 -0.42 -1.24 -0.96 f / f345 1.21 1.24 1.13 0.72 1.19 1.12 ET2 / CT2 0.47 0.44 0.50 0.50 0.50 0.49 ET4 / CT4 0.34 0.40 0.49 0.48 0.26 0.42 SAG51 / SAG42 0.90 0.93 0.97 1.04 0.96 1.03 SAG12 / (SAG11 + SAG12) 0.51 0.49 0.49 0.53 0.46 0.50 CT1 / ET1 0.96 1.12 1.03 0.96 1.24 1.02 R3 / (R3 + R6) 0.71 0.65 0.69 0.63 0.51 0.71 R4 / (R4 + R8) 0.67 0.79 0.68 0.71 0.64 0.67 CT2 / T12 0.98 0.79 0.74 1.07 1.05 0.89 (CT5 + CT6) / ΣAT 0.48 0.60 0.42 0.40 0.50 0.49 CT3 / ET3 0.58 0.61 0.58 0.58 0.66 0.60

[0158] Table 13

[0159] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) element. The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0160] The above description is only for the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the protection scope involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An optical imaging lens, characterized in that, It sequentially includes from the object side to the image side along the optical axis: A first lens with a negative optical power, whose image side is concave; A second lens with a positive optical power, whose object side is convex and image side is convex; A third lens with an optical power, whose image side is concave; A fourth lens with a positive optical power, whose image side is convex; A fifth lens with an optical power, whose object side is concave; and A sixth lens with a negative optical power, whose object side is concave; At least one of the third lens and the fifth lens has a negative optical power; The number of lenses with optical power in the optical imaging lens is six; Wherein, half of the maximum field of view angle of the optical imaging lens, Semi-FOV, satisfies 53° < Semi-FOV < 60°; The total effective focal length f of the optical imaging lens and the curvature radius R11 of the object side of the sixth lens satisfy -1.34 ≤ f / R11 < -0.52; The central thickness CT2 of the second lens on the optical axis and the interval distance T12 between the first lens and the second lens on the optical axis satisfy 0.72 < CT2 / T12 < 1.

10.

2. The optical imaging lens according to claim 1, wherein The optical imaging lens further includes a diaphragm; The distance SD from the diaphragm to the image side of the sixth lens on the optical axis and the distance SL from the diaphragm to the imaging surface of the optical imaging lens on the optical axis satisfy 0.75 < SD / SL < 0.

90.

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 f6 of the sixth lens satisfy -1.24 ≤ f / f6 - f / f1 < -0.

41.

4. The optical imaging lens according to claim 1, wherein The total effective focal length f of the optical imaging lens and the combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfy 0.70 < f / f345 < 1.

25.

5. The optical imaging lens according to claim 1, characterized in that, The edge thickness ET2 of the second lens and the central thickness CT2 of the second lens on the optical axis satisfy 0.40 < ET2 / CT2 ≤ 0.

50.

6. The optical imaging lens according to claim 1, wherein The edge thickness ET4 of the fourth lens and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.25 < ET4 / CT4 < 0.

50.

7. The optical imaging lens according to claim 1, characterized in that The axial distance SAG51 between the intersection point of the object side of the fifth lens and the optical axis and the vertex of the effective radius of the object side of the fifth lens and the axial distance SAG42 between the intersection point of the image side of the fourth lens and the optical axis and the vertex of the effective radius of the image side of the fourth lens satisfy 0.88 < SAG51 / SAG42 < 1.

08.

8. The optical imaging lens according to claim 1, wherein, The axial distance SAG11 between the intersection point of the object side of the first lens and the optical axis and the vertex of the effective radius of the object side of the first lens and the axial distance SAG12 between the intersection point of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens satisfy 0.45 < SAG12 / (SAG11 + SAG12) < 0.

55.

9. The optical imaging lens according to claim 1, characterized in that, The central thickness CT1 of the first lens on the optical axis and the edge thickness ET1 of the first lens satisfy 0.95 < CT1 / ET1 < 1.

25.

10. The optical imaging lens according to claim 1, wherein The radius of curvature R3 of the object side surface of the second lens and the radius of curvature R6 of the image side surface of the third lens satisfy 0.50 < R3 / (R3 + R6) < 0.

75.

11. The optical imaging lens according to claim 1, wherein The radius of curvature R4 of the image side surface of the second lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy 0.60 < R4 / (R4 + R8) < 0.

80.

12. The optical imaging lens according to claim 1, characterized in that, The central thickness CT5 of the fifth lens on the optical axis, the central thickness CT6 of the sixth lens on the optical axis, and the sum ΣAT of the spacing distances on the optical axis between any two adjacent lenses among the first lens to the sixth lens satisfy 0.38 < (CT5 + CT6) / ΣAT < 0.

62.

13. The optical imaging lens according to claim 1, wherein, The central thickness CT3 of the third lens on the optical axis and the edge thickness ET3 of the third lens satisfy 0.55 < CT3 / ET3 < 0.70.

Images