Optical image capturing lens

Abstract

The utility model discloses an optical image capturing lens, which comprises a plurality of light-transmitting elements and at least one non-light-transmitting element, and is characterized in that the plurality of light-transmitting elements comprise a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis; the first lens has positive focal power, and the object side and the image side of the first lens are convex surfaces; the object side of the second lens is a convex surface, and the image side is a concave surface; the sixth lens has negative focal power; the at least one non-light-transmitting element comprises a second positioning ring which is located on the image side of the second lens and at least partially makes contact with the second lens. The effective focal length f1 of the first lens and the curvature radius R2 of the image side surface of the first lens meet-0.18 lt; f1 / R2lt; the effective focal length f2 of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy-1.95 lt; f2 / R4 is smaller than or equal to-1.1, the outer diameter D2s and the inner diameter d2s of the object side face of the second positioning ring, the center thickness CT2 of the second lens and the distance T12 between the first lens and the second lens on the optical axis meet 5.70 lt; d2s / d2s * CT2 / T12lt; and 8.23).

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical elements, and more particularly, to an optical image-taking lens. BACKGROUND

[0002] With the rapid development of the mobile phone industry, consumers have increasingly high requirements for the mobile phone photographing function. In the past two years, more attention has been paid to the photographing effect of long-focus lenses. The long-focus lens has a long focal length, can capture distant scenes, create a sense of space and depth, and compress the depth of field, making the background blurred and the subject prominent in portrait photography, which is very popular among consumers. With the development of long-focus lenses, consumers have increasingly high requirements for the photographing effect of long-focus lenses, and long-focus lenses that also take into account macro effects have gradually become mainstream requirements. However, the yield of long-focus lenses that also take into account macro effects is low, and the cost and delivery schedule have become a common pressure faced by lens manufacturers, which needs to be addressed urgently. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an optical image-taking lens, which can include a plurality of light-transmitting elements and at least one non-light-transmitting element. The plurality of light-transmitting elements can include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in order from an object side to an image side along an optical axis. The first lens has positive refractive power, and its object side surface is convex, and its image side surface is convex. The object side surface of the second lens is convex, and the image side surface of the second lens is concave. The sixth lens has negative refractive power. The at least one non-light-transmitting element can include a second positioning ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens. The optical image-taking lens can satisfy -0.18 < f1 / R2 < -0.05, -1.95 < f2 / R4 ≤ -1.1, and 5.70 < D2s / d2s × CT2 / T12 < 8.23, where f1 is the effective focal length of the first lens, R2 is the curvature radius of the image side surface of the first lens, f2 is the effective focal length of the second lens, R4 is the curvature radius of the image side surface of the second lens, D2s is the outer diameter of the object side surface of the second positioning ring, d2s is the inner diameter of the object side surface of the second positioning ring, CT2 is the center thickness of the second lens on the optical axis, and T12 is the interval distance between the first lens and the second lens on the optical axis.

[0004] In one embodiment, the optical image-taking lens can further include a first lens barrel and a second lens barrel arranged in order from the object side to the image side along the optical axis. The first lens, the second lens, and the third lens are assembled in the first lens barrel, and the fourth lens, the fifth lens, and the sixth lens are assembled in the second lens barrel. The optical image-taking lens realizes zooming by changing the interval distance between the third lens and the fourth lens on the optical axis.

[0005] In one embodiment, a maximum height La of the first lens barrel in the direction of the optical axis and a distance TTL from the object side surface of the first lens to the imaging surface of the optical image taking lens on the optical axis can satisfy: 0.35 < La / TTL < 0.4.

[0006] In one embodiment, a central thickness CT3 of the third lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, a central thickness CT5 of the fifth lens on the optical axis, and a maximum height Lb of the second lens barrel in the direction of the optical axis can satisfy: 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57.

[0007] In one embodiment, a maximum height La of the first lens barrel in the direction of the optical axis, a maximum height Lb of the second lens barrel in the direction of the optical axis, a minimum effective focal length fmin of the optical image taking lens, and a combined focal length f123 of the first lens, the second lens, and the third lens can satisfy: La / Lb x fmin / f123 < 2.

[0008] In one embodiment, a maximum height La of the first lens barrel in the direction of the optical axis, a maximum height Lb of the second lens barrel in the direction of the optical axis, a minimum effective focal length fmin of the optical image taking lens, and a combined focal length f123 of the first lens, the second lens, and the third lens can satisfy: 1.35 < La / Lb x fmin / f123 < 1.53.

[0009] In one embodiment, a minimum effective focal length fmin of the optical image taking lens and an outer diameter D0m of the image side end surface of the second lens barrel can satisfy: 0.88 < fmin / D0m < 1.05.

[0010] In one embodiment, an effective focal length f2 of the second lens, an outer diameter D2m of the image side surface of the second positioning ring, and an inner diameter d2m of the image side surface of the second positioning ring can satisfy: -37.28 mm < f2 x (D2m + d2m) / (D2m - d2m) < -20.78 mm.

[0011] In one embodiment, the at least one non-light-transmitting element can further include a first positioning ring located on the image side of the first lens and at least partially in contact with the first lens on the object side surface; a central thickness CT1 of the first lens on the optical axis, an outer diameter D1m of the image side surface of the first positioning ring, and an inner diameter d1m of the image side surface of the first positioning ring can satisfy: 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / d1m < 1.56.

[0012] In one embodiment, the at least one non-light-transmitting element can further include a fourth positioning ring located on the image side and the object side of the fourth lens and at least partially in contact with the fourth lens; an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, an outer diameter D4s of the object side of the fourth positioning ring, and an inner diameter d4s of the object side of the fourth positioning ring can satisfy 0.53 < f4 / f5 < 0.72 and 1.52 < D4s / d4s < 1.94.

[0013] In one embodiment, the at least one non-light-transmitting element can further include a fourth positioning ring located on the image side and the object side of the fourth lens and at least partially in contact with the fourth lens; a refractive index N5 of the fifth lens, a refractive index N4 of the fourth lens, an outer diameter D4m of the image side of the fourth positioning ring, and an inner diameter d4m of the image side of the fourth positioning ring can satisfy 1.55 < N5 / N4 x D4m / d4m < 2.

[0014] According to the optical image-taking lens of the embodiment of the present application, the first lens has positive refractive power, the object side is a convex surface, and the image side is a convex surface; the object side of the second lens is a convex surface, and the image side is a concave surface; the sixth lens has negative refractive power; the optical image-taking lens further includes a second positioning ring located on the image side and the object side of the second lens and at least partially in contact with the second lens; and the effective focal length f1 of the first lens and the radius of curvature R2 of the image side of the first lens satisfy -0.18 < f1 / R2 < -0.05, the effective focal length f2 of the second lens and the radius of curvature R4 of the image side of the second lens satisfy -1.95 < f2 / R4 ≤ -1.1, the outer diameter D2s of the object side of the second positioning ring, the inner diameter d2s of the object side of the second positioning ring, the central thickness CT2 of the second lens on the optical axis, and the interval distance T12 of the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s x CT2 / T12 < 8.23. Through such a design of the lens, the sensitivity of the second positioning ring can be reasonably reduced while the first lens and the second lens meet the design requirements, and the yield of the lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the drawings:

[0016] Figure 1 The structure and part of the parameter size of the optical image-taking lens according to the exemplary embodiment of the present application are shown;

[0017] Figure 2 The structure of the optical image-taking lens according to the embodiment 1 of the present application is shown.

[0018] Figure 3 A structural diagram of an optical image taking lens according to Embodiment 2 of the present application is shown;

[0019] Figure 4 , Figure 5 and Figure 6 axial chromatic aberration curves, astigmatism curves and distortion curves of the optical image taking lenses according to Embodiments 1 and 2 of the present application are shown respectively;

[0020] Figure 7 A structural diagram of an optical image taking lens according to Embodiment 3 of the present application is shown;

[0021] Figure 8 A structural diagram of an optical image taking lens according to Embodiment 4 of the present application is shown;

[0022] Figure 9 , Figure 10 and Figure 11 axial chromatic aberration curves, astigmatism curves and distortion curves of the optical image taking lenses according to Embodiments 3 and 4 of the present application are shown respectively;

[0023] Figure 12 A structural diagram of an optical image taking lens according to Embodiment 5 of the present application is shown;

[0024] Figure 13 A structural diagram of an optical image taking lens according to Embodiment 6 of the present application is shown;

[0025] Figure 14 , Figure 15 and Figure 16 axial chromatic aberration curves, astigmatism curves and distortion curves of the optical image taking lenses according to Embodiments 5 and 6 of the present application are shown respectively; and

[0026] Figure 17 A structural diagram of an optical image taking lens according to another exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be understood that the detailed description is only a description of exemplary embodiments of the present application and is in no way limiting on the scope of the present application. Throughout the description, like reference numerals refer to like elements. The expression “and / or” includes any and all combinations of one or more of the associated listed items.

[0028] It should be noted that the terms first, second, third, etc. are used herein only to distinguish one feature from another, and do not denote any limitation. Thus, a first lens discussed below can also be termed a second lens or a third lens, without departing from the teachings of the present application.

[0029] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0030] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made in accordance with a general method in the art, for example, judging convexity or concavity by the sign of the R value (R refers to the radius of curvature in the paraxial region). In this context, the surface of each lens closest to the object in the direction of the optical path is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane in the direction of the optical path is referred to as the image side surface of the lens. In terms of the object side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave. In terms of the image side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0031] It should also be understood that the use of the terms "include", "including", "have", "has", "contain", "containing", "comprise", "comprising" or "comprises" when used in this specification, specifies the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. In addition, when describing the embodiments of the present application, the use of "may" indicates that "one or more embodiments of the present application". Also, the term "exemplary" is intended to mean an example or an illustration.

[0032] 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 the terms should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0033] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The following embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but can not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] The features, principles and other aspects of the present application are described in detail below.

[0035] The optical image taking lens according to the exemplary embodiments of the present application can include a plurality of light-transmitting elements and at least one non-light-transmitting element. The plurality of light-transmitting elements may, for example, include a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in order from an object side to an image side along an optical axis.

[0036] In the exemplary embodiments, the first lens can have a positive refractive power.

[0037] In the exemplary embodiments, the first lens and the second lens can have positive and negative refractive power properties opposite to each other.

[0038] In the exemplary embodiments, the sixth lens can have a negative refractive power.

[0039] In the exemplary embodiments, the object side surface of the first lens can be a convex surface, and the image side surface can be a convex surface.

[0040] In the exemplary embodiments, the object side surface of the second lens can be a convex surface, and the image side surface can be a concave surface.

[0041] In the exemplary embodiments, the at least one non-light-transmitting element can include a second positioning ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens.

[0042] In the exemplary embodiments, the optical image taking lens of the present application can satisfy the condition formula -0.18 < f1 / R2 < -0.05, where f1 is the effective focal length of the first lens, and R2 is the curvature radius of the image side surface of the first lens.

[0043] In the exemplary embodiments, the optical image taking lens can be zoomed by changing the on-axis distance between at least some of the first lens to the sixth lens. For example, the optical image taking lens can be zoomed by changing the on-axis distance between the third lens and the fourth lens.

[0044] In exemplary embodiments, the optical image-taking lens of the present application can satisfy the condition formula -1.95 < f2 / R4 < -1.1, where f2 is the effective focal length of the second lens, and R4 is the curvature radius of the image side surface of the second lens.

[0045] In exemplary embodiments, the optical image-taking lens of the present application can satisfy the condition formula 5.70 < D2s / d2s x CT2 / T12 < 8.23, where D2s is the outer diameter of the object side surface of the second positioning ring, d2s is the inner diameter of the object side surface of the second positioning ring, CT2 is the center thickness of the second lens on the optical axis, and T12 is the interval distance of the first lens and the second lens on the optical axis.

[0046] The optical image-taking lens according to exemplary embodiments of the present application can include, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power, the object side surface thereof is convex, and the image side surface thereof is convex; the object side surface of the second lens is convex, and the image side surface thereof is concave; the sixth lens has negative refractive power; the optical image-taking lens further includes a second positioning ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens; and the effective focal length f1 of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy -0.18 < f1 / R2 < -0.05, the effective focal length f2 of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy -1.95 < f2 / R4 < -1.1, and the outer diameter D2s of the object side surface of the second positioning ring, the inner diameter d2s of the object side surface of the second positioning ring, the center thickness CT2 of the second lens on the optical axis, and the interval distance T12 of the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s x CT2 / T12 < 8.23. Through such a configuration of the lens, the sensitivity of the second positioning ring in the case of cooperation of the first and second lenses can be solved while the first and second lenses satisfy the design requirements, and the sensitivity of the second positioning ring can be reasonably reduced, thereby improving the yield of the lens.

[0047] Referring to Table 1, Table 1 shows three exemplary embodiments of Example 1, Example 2 and Example 3, wherein Example 1 and Example 2 are two embodiments before improvement, and Example 3 is one embodiment after improvement. The lenses of the three exemplary embodiments have similar structural arrangements: including first to sixth lenses arranged in sequence from the object side to the image side along the optical axis, the first lens has positive refractive power, the sixth lens has negative refractive power, the first lens has a convex-convex surface type, the second lens has a convex-concave surface type, and the image side of the second lens has a second positioning ring at least partially in contact with the second lens. In Example 1, the optical image taking lens satisfies the condition formula f1 / R2 = -0.14, f2 / R4 = -1.3 and D2s / d2s x CT2 / T12 = 12.3, and the MTF (Modulation Transfer Function) value corresponding to the central field of view of the lens according to the embodiment is less than 0.82. In Example 2, the optical image taking lens satisfies the condition formula f1 / R2 = -0.12, f2 / R4 = -1.3 and D2s / d2s x CT2 / T12 = 4.5, and the MTF value corresponding to the central field of view of the lens according to the embodiment is less than 0.81. In Example 3, the optical image taking lens satisfies the condition formula f1 / R2 = -0.09, f2 / R4 = -1.1 and D2s / d2s x CT2 / T12 = 7.5, and the MTF curve of the lens according to the embodiment is concentrated, and the MTF value corresponding to the central field of view is greater than 0.84. It can be seen that when the ratio f1 / R2 of the effective focal length f1 of the first lens to the radius of curvature R2 of the image side surface of the first lens is in the range of greater than -0.18 and less than -0.05, and the ratio f2 / R4 of the effective focal length f2 of the second lens to the radius of curvature R4 of the image side surface of the second lens is in the range of greater than -1.95 and less than or equal to -1.1, by reasonably controlling the value of the condition formula D2s / d2s x CT2 / T12 in the range of greater than 5.70 and less than 8.23, the MTF curve of the lens is better, and the yield of the lens is higher.

[0048] Therefore, according to the optical image taking lens of the embodiment of the present application, while controlling the effective focal length f1 of the first lens and the radius of curvature R2 of the image side surface of the first lens to satisfy -0.18 < f1 / R2 < -0.05, and the effective focal length f2 of the second lens and the radius of curvature R4 of the image side surface of the second lens to satisfy -1.95 < f2 / R4 ≤ -1.1, by controlling the outer diameter D2s of the object side surface of the second positioning ring, the inner diameter d2s of the object side surface of the second positioning ring, the central thickness CT2 of the second lens on the optical axis, and the interval distance T12 of the first lens and the second lens on the optical axis to satisfy 5.70 < D2s / d2s x CT2 / T12 < 8.23, the sensitivity of the second positioning ring can be reduced while the first and second lenses meet the design requirements, and the yield of the lens is improved.

[0049]

[0050] Table 1

[0051] In an example embodiment, the optical image capturing lens can further include a first lens barrel and a second lens barrel arranged in sequence along the optical axis from the object side to the image side. The first lens, the second lens, and the third lens can be assembled in the first lens barrel; the fourth lens, the fifth lens, and the sixth lens can be assembled in the second lens barrel. The central axes of the first lens barrel and the second lens barrel can be located on a straight line, for example. Illustratively, the central axes of the first lens barrel and the second lens barrel can be located on the same straight line as the optical axis of the optical image capturing lens / the optical axes of the plurality of light-transmitting elements. By properly arranging the first lens barrel and the second lens barrel, for example, by arranging the central axes of the two on a straight line, the assembly eccentricity of the lens barrel and the lens can be more favorably controlled, the assembly consistency and stability can be improved, and the yield can be improved in turn.

[0052] In an example embodiment, the optical image capturing lens can achieve a zooming effect by changing the spacing between the lenses. For example, the optical image capturing lens can achieve zooming by changing the spacing between the third lens and the fourth lens on the optical axis. For another example, the optical image capturing lens can achieve zooming by adjusting the spacing between the first lens barrel, in which the first to third lenses are assembled, and the second lens barrel, in which the fourth to sixth lenses are assembled.

[0053] In an example embodiment, the optical image capturing lens can also include a lens barrel, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens can all be assembled in the lens barrel, for example Figure 17 As shown, the first to sixth lenses E1-E6 are all assembled in the lens barrel P0. The first to sixth lenses can be arranged in sequence along the optical axis from the object side to the image side. The optical image capturing lens can further include at least one non-light-transmitting element.

[0054] In an example embodiment, there can be an air gap between each pair of adjacent lenses among the first to sixth lenses. The number of lenses with optical power in the optical image capturing lens is six, for example.

[0055] In an example embodiment, the at least one non-light-transmitting element can further include a first positioning ring located on the image side of the first lens and at least partially in contact with the object side surface of the first lens.

[0056] In an example embodiment, the at least one non-light-transmitting element can further include a fourth positioning ring located on the image side of the fourth lens and at least partially in contact with the object side surface of the fourth lens.

[0057] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula 0.35 < La / TTL < 0.4, wherein La is the maximum height of the first lens barrel along the optical axis, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical image capturing lens on the optical axis. By controlling the condition formula 0.35 < La / TTL < 0.4, the height of the first lens barrel can be controlled to avoid the risk of damage to the appearance of the lens caused by the convexity of the lens in the second lens barrel.

[0058] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57, wherein CT3 is the center thickness of the third lens on the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, and Lb is the maximum height of the second lens barrel along the optical axis. By controlling the condition formula 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57, the height of the second lens barrel can be controlled to avoid mutual interference between the first lens barrel and the second lens barrel during operation, thereby avoiding the situation where imaging is not possible.

[0059] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula La / Lb x fmin / f123 < 2, wherein La is the maximum height of the first lens barrel along the optical axis, Lb is the maximum height of the second lens barrel along the optical axis, fmin is the minimum effective focal length of the optical image capturing lens, and f123 is the combined focal length of the first lens, the second lens, and the third lens. By controlling the condition formula La / Lb x fmin / f123 < 2, the overall length of the lens can be more effectively controlled, which can reasonably control the air gap between the lenses and is beneficial to avoid excessive light deflection, which can cause large off-axis segment differences of the lenses and affect the yield due to unstable assembly. More specifically, La, Lb, fmin, and f123 can satisfy 1.35 < La / Lb x fmin / f123 < 1.53.

[0060] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula 0.88 < fmin / D0m < 1.05, wherein fmin is the minimum effective focal length of the optical image capturing lens, and D0m is the outer diameter of the image side end surface of the second lens barrel (i.e., the end surface or surface closest to the image side of the second lens barrel that is perpendicular or approximately perpendicular to the optical axis). By controlling the condition formula 0.88 < fmin / D0m < 1.05, the height of the light exiting the lens to the chip can be more effectively controlled, which can control optical parameters such as CRA, and the outer diameter of the lens can also be controlled to avoid difficulties in module assembly caused by an excessively large outer diameter.

[0061] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula -37.28mm < f2 x (D2m+d2m) / (D2m-d2m) < -20.78mm, where f2 is the effective focal length of the second lens, D2m is the outer diameter of the image side surface of the second spacer ring, and d2m is the inner diameter of the image side surface of the second spacer ring. By controlling the condition formula -37.28mm < f2 x (D2m+d2m) / (D2m-d2m) < -20.78mm, the edge thickness of the second lens can be reasonably increased, the strength of the second lens can be increased, the assembly stability of the second lens and the second spacer ring can be improved, and the problem of low yield caused by the cooperation of the second lens, the second spacer ring and the third lens can be improved.

[0062] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / d1m < 1.56, where CT1 is the center thickness of the first lens on the optical axis, T12 is the interval distance of the first lens and the second lens on the optical axis, D1m is the outer diameter of the image side surface of the first spacer ring, and d1m is the inner diameter of the image side surface of the first spacer ring. By controlling the condition formula 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / d1m < 1.56, the molding feasibility of the first lens and the second lens can be improved, and at the same time, the assembly cooperation of the first lens, the first spacer ring and the second lens can be controlled, the assembly stability can be improved, and the problem of low yield caused by the cooperation between the first lens, the first spacer ring and the second lens can be improved.

[0063] In exemplary embodiments, the optical image capturing lens of the present application can satisfy the condition formula 0.53 < f4 / f5 < 0.72 and 1.52 < D4s / d4s < 1.94, where f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, D4s is the outer diameter of the object side surface of the fourth spacer ring, and d4s is the inner diameter of the object side surface of the fourth spacer ring. By reasonably controlling the ratio of the effective distances of the fourth lens and the fifth lens, the light rays converged by the fourth lens can be dispersed through the fifth lens, and at the same time, by reasonably controlling the ratio of the outer diameter and the inner diameter of the fourth spacer ring, the relative luminance and other optical main parameters can be controlled to obtain the desired imaging effect.

[0064] In exemplary embodiments, the optical image capturing lens of the present application can satisfy condition formula 1.55 < N5 / N4 x D4m / d4m < 2, wherein N5 is the refractive index of the fifth lens, N4 is the refractive index of the fourth lens, D4m is the outer diameter of the image side surface of the fourth spacer ring, and d4m is the inner diameter of the image side surface of the fourth spacer ring. By controlling the condition formula 1.55 < N5 / N4 x D4m / d4m < 2, the gap between the fourth lens and the fifth lens can be more effectively controlled, which helps to control the field curvature problem caused by the gap, while making the lens thickness and spacing more uniform, which can effectively reduce the thickness sensitivity of the lens and correct the field curvature.

[0065] In exemplary embodiments, the first lens can have a positive refractive power, the object side surface thereof can be convex, and the image side surface thereof can be convex.

[0066] In exemplary embodiments, the second lens can have a negative refractive power, the object side surface thereof can be convex, and the image side surface thereof can be concave.

[0067] In exemplary embodiments, the third lens can have a positive refractive power, the object side surface thereof can be concave, and the image side surface thereof can be convex.

[0068] In exemplary embodiments, the fourth lens can have a negative refractive power, the object side surface thereof can be concave, and the image side surface thereof can be concave.

[0069] In exemplary embodiments, the fifth lens can have a negative refractive power, the object side surface thereof can be convex or concave, and the image side surface thereof can be concave.

[0070] In exemplary embodiments, the sixth lens can have a negative refractive power, the object side surface thereof can be convex or concave, and the image side surface thereof can be concave.

[0071] In exemplary embodiments, the optical image capturing lens of the present application can include a cut lens. The outer peripheral surface of the cut lens can have a cut portion and a non-cut portion, and the outer diameter of the cut portion of the lens can be smaller than the outer diameter of the non-cut portion of the lens. When the outer peripheral surface of the lens has a cut portion, the outer diameter / maximum outer diameter of the lens generally refers to the outer diameter / maximum outer diameter of the non-cut portion of the lens.

[0072] In exemplary embodiments, the non-light-transmitting element group can include a cut spacer ring. The outer peripheral surface of the cut spacer ring can have a cut portion and a non-cut portion, and the outer diameter of the cut portion of the spacer ring can be smaller than the outer diameter of the non-cut portion of the spacer ring. When the outer peripheral surface of the spacer ring has a cut portion, the outer diameter / maximum outer diameter of the spacer ring generally refers to the outer diameter / maximum outer diameter of the non-cut portion of the spacer ring.

[0073] In exemplary embodiments, the optical image capturing lens of the present application can include at least one diaphragm. The diaphragm can restrict the light path and control the light intensity. The diaphragm can be disposed at an appropriate position of the optical image capturing lens, for example, the diaphragm can be disposed between the third lens and the fourth lens.

[0074] In exemplary embodiments, optionally, the optical image capturing lens described above can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] In exemplary embodiments, the first lens to the sixth lens have respective surfaces that can include aspherical surfaces, which have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. By using aspherical surfaces, aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0076] According to the six-piece long-focus optical image capturing lens provided by the exemplary embodiments of the present application, the yield can be effectively improved by reducing the sensitivity of black objects (non-light-transmitting elements).

[0077] In one aspect, the optical image capturing lens according to the embodiments of the present application includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power, the object side surface thereof is convex, and the image side surface thereof is convex; the object side surface of the second lens is convex, and the image side surface thereof is concave; the sixth lens has negative refractive power; the optical image capturing lens further includes a second positioning ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens; and the effective focal length f1 of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy -0.18 < f1 / R2 < -0.05, the effective focal length f2 of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy -1.95 < f2 / R4 ≤ -1.1, and the outer diameter D2s of the object side surface of the second positioning ring, the inner diameter d2s of the object side surface of the second positioning ring, the center thickness CT2 of the second lens on the optical axis, and the interval distance T12 of the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23. Through such a configuration of the lens, the sensitivity of the second positioning ring can be reasonably reduced while the first lens and the second lens meet the design requirements, thereby improving the yield of the lens.

[0078] In another aspect, an optical image capturing lens according to embodiments of the present application includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is convex; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the sixth lens has negative refractive power; the optical image capturing lens further includes a second spacer ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens; and the optical image capturing lens further includes a first lens barrel and a second lens barrel arranged in order from the object side to the image side along the optical axis, the first lens to the third lens are arranged in the first lens barrel, and the fourth lens to the sixth lens are arranged in the second lens barrel; and the maximum height La of the first lens barrel along the optical axis, the maximum height Lb of the second lens barrel along the optical axis, the minimum effective focal length fmin of the optical image capturing lens, and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy the condition La / Lb x fmin / f123 < 2. Through such a configuration of the lens, the overall length of the lens can be more easily controlled, the air gap between the lenses can be reasonably controlled, and the problem of excessive light deflection leading to large off-axis segment difference of the lenses and thus unstable assembly affecting yield can be avoided.

[0079] In another aspect, an optical image capturing lens according to embodiments of the present application includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is convex; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the sixth lens has negative refractive power; the optical image capturing lens further includes a second spacer ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens; and the optical image capturing lens further includes a first lens barrel and a second lens barrel arranged in order from the object side to the image side along the optical axis, the first lens to the third lens are arranged in the first lens barrel, and the fourth lens to the sixth lens are arranged in the second lens barrel; and the maximum height La of the first lens barrel along the optical axis, the maximum height Lb of the second lens barrel along the optical axis, the minimum effective focal length fmin of the optical image capturing lens, and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy the condition La / Lb x fmin / f123 < 2. Through such a configuration of the lens, the overall length of the lens can be more easily controlled, the air gap between the lenses can be reasonably controlled, and the problem of excessive light deflection leading to large off-axis segment difference of the lenses and thus unstable assembly affecting yield can be avoided.

[0080] In still another aspect, an optical image capturing lens according to embodiments of the present application includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is convex; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the sixth lens has negative refractive power; the optical image capturing lens further includes a second spacer ring located on the image side of the second lens and having an object side surface at least partially in contact with the second lens, and a fourth spacer ring located on the image side of the fourth lens and having an object side surface at least partially in contact with the fourth lens; and the refractive index N5 of the fifth lens, the refractive index N4 of the fourth lens, the outer diameter D4m of the image side surface of the fourth spacer ring, and the inner diameter d4m of the image side surface of the fourth spacer ring satisfy the condition 1.55 < N5 / N4 x D4m / d4m < 2. Through such a configuration of the lens, the gap between the fourth lens and the fifth lens can be more effectively controlled, the problem of field curvature caused by the gap can be more effectively controlled, the lens thickness and the interval can be more uniform, the thickness sensitivity of the lens can be effectively reduced, and the field curvature can be corrected.

[0081] However, those skilled in the art will understand that the number of lenses constituting the optical image capturing lens and the division manner of the lens groups can be changed, and the number of spacer rings can be changed without departing from the technical solutions claimed in the present application, to obtain the various results and advantages described in the present specification, which are not specifically limited by the present application. For example, although the two lens groups and six lenses are described in the embodiments, the optical image capturing lens is not limited to including two lens groups and six lenses. If necessary, the optical image capturing lens can further include other numbers of lens groups and / or lenses. For another example, the optical image capturing lens can also include other numbers of spacer rings different from those described in the above embodiments, as necessary.

[0082] The specific embodiments of the optical image capturing lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following refers to Figure 2 An optical image capturing lens according to Embodiment 1 of the present application is described, Figure 2 A structure diagram of the optical image capturing lens according to Embodiment 1 of the present application is shown.

[0085] In this embodiment, the optical imaging lens includes a first lens barrel P0a and a second lens barrel P0b arranged sequentially from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The first lens E1, the second lens E2 and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5 and the sixth lens E6 are assembled in the second lens barrel P0b.

[0086] In this embodiment, the optical imaging lens further includes a plurality of non-transparent elements: a first positioning ring P1, located on the image side of the first lens E1, and its object side at least partially in contact with the first lens E1; a second positioning ring P2, located on the image side of the second lens E2, and its object side at least partially in contact with the second lens E2; a fourth positioning ring P4, located on the image side of the fourth lens E4, and its object side at least partially in contact with the fourth lens E4; a fifth positioning ring P5, located on the image side of the fifth lens E5, and its object side at least partially in contact with the fifth lens E5; a fifth spacer positioning ring P5b, located on the image side of the fifth positioning ring P5, and its object side at least partially in contact with the fifth positioning ring P5; and a fifth auxiliary positioning ring P5c, located on the image side of the fifth spacer positioning ring P5b, and its object side at least partially in contact with the fifth spacer positioning ring P5b.

[0087] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0088] In this embodiment, the optical imaging lens may also include, for example, a filter located on the image side of the sixth lens E6 and an imaging surface located on the image side of the filter. Light from the object may pass sequentially through each surface S1 to S15 and the filter and finally be imaged on the imaging surface.

[0089] Table 2 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0090]

[0091] Table 2

[0092] The optical image capturing lens according to this embodiment can achieve zooming by changing the lens spacing, i.e., at least some of the values in the column of 'Thickness / Distance' in Table 2 representing the distance between lenses can be changed. For example, the value 0.4869 in the row of S6 corresponding to the column of 'Thickness / Distance' representing the distance on the optical axis between the image side surface of the third lens E3 and the stop STO and / or the value -0.0597 in the row of STO corresponding to the column of 'Thickness / Distance' representing the distance on the optical axis between the stop STO and the object side surface of the fourth lens E4 can be changed. The optical image capturing lens according to this embodiment can achieve zooming in the range of 5.93mm to 6.80mm.

[0093] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape x of each aspherical surface can be defined using, but not limited to, the following aspherical surface formula:

[0094]

[0095] where x is the sag of the aspherical surface at a position with a height of h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3-1 and Table 3-2 below give the high-order term coefficients A4, A6, A8, A10, and A12 that can be used for each aspherical surface S1-S12 in Embodiment 1. 10 12 14 16 18 20 22 24 26 28 30 .

[0096] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.9397E-02 3.5024E-03 -1.3572E-03 -7.8725E-04 -3.6637E-04 -1.0019E-04 -5.7746E-05 S2 1.2743E-02 -8.3439E-03 -3.0748E-04 -1.7952E-04 -1.2455E-04 -9.6580E-05 -8.2834E-05 S3 -9.3854E-02 4.5503E-03 1.8747E-03 -6.0539E-04 1.7598E-04 -2.1901E-04 -1.0709E-05 S4 1.3144E-01 1.5957E-03 9.7190E-03 -1.7438E-03 1.0849E-03 -1.2816E-04 -1.6947E-04 S5 2.0626E-01 -1.8956E-02 1.7714E-03 2.2568E-04 -2.1618E-04 9.4504E-05 -4.7050E-05 S6 2.1668E-02 9.8491E-03 3.7589E-03 8.6403E-04 3.8849E-04 9.8727E-05 5.2078E-05 S7 8.1527E-02 9.9690E-03 -4.6232E-03 2.4456E-03 -1.2231E-03 6.0084E-04 -2.6997E-04 S8 -2.3533E-01 -1.0075E-02 -1.5187E-02 -2.4002E-03 -1.7727E-03 2.2088E-06 2.2669E-04 S9 3.7031E-01 -2.2526E-02 -7.9808E-03 2.3943E-02 -2.6935E-02 1.9506E-02 -9.6249E-03 S10 -5.5060E-01 4.3733E-02 -2.2330E-02 -3.5883E-03 -6.4678E-04 1.0922E-03 -3.4842E-04 S11 -9.4379E-01 4.0566E-01 -1.0436E-01 6.7701E-04 2.5795E-03 4.3478E-03 -3.4754E-03 S12 -1.7886E+00 3.5566E-01 -5.8922E-02 2.0468E-02 -1.3969E-02 1.8325E-03 -1.1068E-03

[0097] Table 3-1

[0098] Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.1117E-05 -1.8562E-05 -5.3847E-06 -8.1268E-06 8.0447E-07 2.4819E-06 3.0679E-06 S2 -8.9610E-06 1.7968E-05 -1.9251E-06 5.4620E-06 1.0645E-05 -3.1394E-06 0.0000E+00 S3 -1.5616E-05 2.9037E-05 -5.9457E-06 5.6229E-06 1.0703E-05 -5.3397E-06 0.0000E+00 S4 2.2820E-04 -1.5048E-04 5.6006E-05 -4.7245E-05 1.6874E-05 2.3754E-05 2.0043E-06 S5 5.0217E-05 -3.6177E-05 2.5592E-05 -1.0869E-05 1.4320E-05 -8.0296E-06 0.0000E+00 S6 1.2103E-05 1.1688E-05 -1.3483E-06 2.1622E-06 -3.5710E-06 1.4029E-06 0.0000E+00 S7 1.2112E-04 -5.2938E-05 2.2141E-05 -8.8854E-06 4.9325E-06 -1.7261E-06 0.0000E+00 S8 -1.6864E-04 1.8647E-04 -9.0083E-05 4.9027E-05 -1.7855E-05 2.0171E-05 0.0000E+00 S9 2.7629E-03 8.4131E-04 -2.0683E-03 1.8695E-03 -1.2775E-03 5.9906E-04 -1.9247E-04 S10 -1.8187E-04 -4.1747E-05 1.6718E-05 2.8921E-05 -2.5944E-06 1.6030E-05 0.0000E+00 S11 -3.5169E-04 6.1038E-04 1.1382E-05 -1.9738E-04 3.2326E-06 6.3057E-05 0.0000E+00 S12 5.4172E-04 -3.3308E-04 -1.0354E-04 -1.0610E-04 3.1403E-05 3.3722E-05 0.0000E+00

[0099] Table 3-2

[0100] Referring to Table 8, the values of the plurality of relevant parameters regarding the first lens barrel P0a, the second lens barrel P0b, and the plurality of spacer elements P1, P2, P4, P5 in this embodiment are shown in the row of 'Embodiment 1' in Table 8, and the specific descriptions of the plurality of relevant parameters shown in Table 8 are as follows, respectively:

[0101] ​​​​​​​​​​La is the maximum height of the first lens tube P0a along the optical axis, Lb is the maximum height of the second lens tube P0b along the optical axis, D2s is the outer diameter of the object side of the second positioning ring P2, d2s is the inner diameter of the object side of the second positioning ring P2, D4s is the outer diameter of the object side of the fourth positioning ring P4, d4s is the inner diameter of the object side of the fourth positioning ring P4, D0m is the outer diameter of the image side end face of the second lens tube P0b, D4m is the outer diameter of the image side of the fourth positioning ring P4, d4m is the inner diameter of the image side of the fourth positioning ring P4, D1m is the outer diameter of the image side of the first positioning ring P1, d1m is the inner diameter of the image side of the first positioning ring P1, D2m is the outer diameter of the image side of the second positioning ring P2, and d2m is the inner diameter of the image side of the second positioning ring P2.

[0102] The units for all the parameters shown in Table 8 are millimeters (mm). The schematic diagrams of these parameters in the optical imaging lens structure are shown below. Figure 1 As shown.

[0103] Example 2

[0104] The following is for reference Figure 3 Describes the optical imaging lens according to Embodiment 2 of this application. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0105] In this embodiment, similar to Embodiment 1, the optical imaging lens also includes a first lens barrel P0a and a second lens barrel P0b arranged sequentially from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The first lens E1, the second lens E2 and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5 and the sixth lens E6 are assembled in the second lens barrel P0b.

[0106] In this embodiment, the optical image taking lens also comprises a plurality of non-light-transmitting elements: a first positioning ring P1 located on the image side of the first lens E1 and having a material side at least partially in contact with the first lens E1; a second positioning ring P2 located on the image side of the second lens E2 and having a material side at least partially in contact with the second lens E2; a fourth positioning ring P4 located on the image side of the fourth lens E4 and having a material side at least partially in contact with the fourth lens E4; a fifth positioning ring P5 located on the image side of the fifth lens E5 and having a material side at least partially in contact with the fifth lens E5; a fifth interval positioning ring P5b located on the image side of the fifth positioning ring P5 and having a material side at least partially in contact with the fifth positioning ring P5; and a fifth auxiliary positioning ring P5c located on the image side of the fifth interval positioning ring P5b and having a material side at least partially in contact with the fifth interval positioning ring P5b.

[0107] The basic parameter table of the optical image taking lens of this embodiment is the same as Table 2, and the high-order term coefficient table of the aspheric surface is the same as Table 3-1 and Table 3-2. The optical image taking lens according to this embodiment can also realize zooming in the range of 5.93mm to 6.80mm.

[0108] The difference between this embodiment and embodiment 1 is that the values of at least some of the parameters shown in Table 8 are different, and the values of the parameters in this embodiment are shown in the ‘Embodiment 2’ row in Table 8. Among them, the specific description of the meaning represented by each parameter is the same as described in the previous embodiment 1, which will not be repeated here.

[0109] Figures 4 to 6 The performance curves of the optical image taking lenses of embodiments 1 and 2 at the maximum focal length are shown, wherein, Figure 4 The on-axis chromatic aberration curves of the optical image taking lenses of embodiments 1 and 2 are shown, which represent the deviation of the converging focal points of light rays of different wavelengths after passing through the lens; Figure 5 The astigmatism curves of the optical image taking lenses of embodiments 1 and 2 are shown, which represent the meridional image surface curvature and sagittal image surface curvature; Figure 6 The distortion curves of the optical image taking lenses of embodiments 1 and 2 are shown, which represent the distortion size values corresponding to different image heights. According to Figures 4 to 6 It can be seen that the optical image taking lenses given in embodiments 1 and 2 can achieve good imaging quality.

[0110] Example 3

[0111] The following refers to Figure 7 The optical image taking lens according to embodiment 3 of the present application is described, Figure 7 The structural schematic diagram of the optical image taking lens according to embodiment 3 of the present application is shown.

[0112] In this embodiment, the optical imaging lens includes a first lens barrel P0a and a second lens barrel P0b arranged sequentially from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The first lens E1, the second lens E2 and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5 and the sixth lens E6 are assembled in the second lens barrel P0b.

[0113] In this embodiment, the optical imaging lens further includes a plurality of non-transparent elements: a first positioning ring P1, located on the image side of the first lens E1, and its object side at least partially in contact with the first lens E1; a second positioning ring P2, located on the image side of the second lens E2, and its object side at least partially in contact with the second lens E2; a fourth positioning ring P4, located on the image side of the fourth lens E4, and its object side at least partially in contact with the fourth lens E4; a fifth positioning ring P5, located on the image side of the fifth lens E5, and its object side at least partially in contact with the fifth lens E5; a fifth spacer positioning ring P5b, located on the image side of the fifth positioning ring P5, and its object side at least partially in contact with the fifth positioning ring P5; and a fifth auxiliary positioning ring P5c, located on the image side of the fifth spacer positioning ring P5b, and its object side at least partially in contact with the fifth spacer positioning ring P5b.

[0114] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0115] In this embodiment, the optical imaging lens may also include, for example, a filter located on the image side of the sixth lens E6 and an imaging surface located on the image side of the filter. Light from the object may pass sequentially through each surface S1 to S15 and the filter and finally be imaged on the imaging surface.

[0116] Table 4 shows the basic parameters of the optical imaging lens of Example 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0117]

[0118] Table 4

[0119] The optical imaging lens according to this embodiment can achieve zoom by changing the lens spacing, that is, at least some of the values ​​representing the distance between lenses in the 'Thickness / Distance' column of Table 4 can be changed. For example, the value 0.4705 in row S6 corresponding to the 'Thickness / Distance' column, representing the distance on the optical axis between the image side of the third lens E3 and the aperture STO, and / or the value -0.0582 in row STO corresponding to the 'Thickness / Distance' column, representing the distance on the optical axis between the aperture STO and the object side of the fourth lens E4, can be changed. The optical imaging lens according to this embodiment can achieve zoom in the range of 5.85mm to 6.80mm.

[0120] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. The shape of each aspherical surface can be defined by formula (1) given in embodiment 1 above. Tables 5-1 and 5-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror surface S1-S12 in this embodiment. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0121]

[0122]

[0123] Table 5-1

[0124] Face number A18 A20 A22 A24 A26 A28 A30 S1 3.4359E-05 -1.9854E-05 1.2263E-05 -1.4061E-05 1.1850E-05 -2.1643E-06 3.9548E-06 S2 -7.5736E-05 6.4958E-05 -1.7524E-05 1.9441E-05 1.2727E-05 -9.1011E-06 0.0000E+00 S3 -9.1869E-05 8.3479E-05 -8.8513E-06 1.0650E-05 1.6209E-05 -1.4590E-05 0.0000E+00 S4 3.3706E-04 -3.2243E-04 9.9735E-05 -2.1739E-05 9.0523E-07 7.2331E-05 1.3072E-05 S5 1.4119E-04 -1.2900E-04 6.3139E-05 -1.8387E-05 -7.8962E-06 -7.0779E-06 0.0000E+00 S6 6.3087E-05 2.1664E-05 2.0987E-05 4.9333E-06 4.8972E-06 -1.0401E-06 0.0000E+00 S7 1.4846E-04 -6.9631E-05 2.2428E-05 -5.6181E-06 3.3464E-06 -1.2895E-06 0.0000E+00 S8 -1.8715E-04 2.6022E-04 -1.2408E-04 3.0707E-05 -3.6231E-05 -8.6344E-06 0.0000E+00 S9 1.2989E-04 7.9334E-05 4.2754E-05 2.3790E-05 7.7789E-06 -8.8683E-06 -4.7496E-06 S10 -8.1647E-05 -7.4842E-05 1.3366E-05 -9.7589E-06 5.6234E-07 6.0284E-06 0.0000E+00 S11 -4.7941E-03 -6.8946E-04 6.7698E-04 5.7742E-04 -8.6402E-05 -4.4872E-04 5.0888E-04 S12 1.2642E-03 6.9983E-04 5.4237E-04 -2.7498E-05 -5.2006E-06 -1.0873E-04 -1.5173E-05

[0125] Table 5-2

[0126] Referring to Table 8, the values ​​of each relevant parameter in this embodiment are shown in the 'Example 3' row of Table 8. The specific description of the meaning of each parameter is the same as that in Example 1 above, and will not be repeated here.

[0127] Example 4

[0128] The following is for reference Figure 8 Describes the optical imaging lens according to Embodiment 4 of this application. Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0129] In this embodiment, the optical image-taking lens also includes a first lens barrel P0a and a second lens barrel P0b arranged in sequence from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 also arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1, the second lens E2, and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 are assembled in the second lens barrel P0b.

[0130] In this embodiment, the optical image-taking lens also includes a first lens barrel P0a and a second lens barrel P0b arranged in sequence from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6 also arranged in sequence from the object side to the image side along the optical axis, wherein the first lens E1, the second lens E2, and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 are assembled in the second lens barrel P0b.

[0131] The basic parameter table of the optical image-taking lens of this embodiment is the same as Table 4, and the high-order term coefficient table of the aspherical surface is the same as Table 5-1 and Table 5-2. The optical image-taking lens according to this embodiment can also realize zooming in the range of 5.85 mm to 6.80 mm.

[0132] This embodiment is different from embodiment 3 in that the numerical values of the relevant parameters shown in Table 8 are different, and the numerical values of the parameters in this embodiment are shown in the ‘Embodiment 4’ row in Table 8. Among them, the specific description of the meaning represented by each parameter is the same as described in the previous embodiment 1, which will not be repeated here.

[0133] Figures 9 to 11 The performance curves of the optical image-taking lenses of embodiments 3 and 4 at the maximum focal length are shown, wherein, Figure 9 The on-axis chromatic aberration curves of the optical image-taking lenses of embodiments 3 and 4 are shown, which represent the deviation of the converging focal points of light rays of different wavelengths after passing through the lens; Figure 10 The astigmatism curves of the optical image-taking lenses of embodiments 3 and 4 are shown, which represent the meridional image surface curvature and sagittal image surface curvature; Figure 11 The distortion curves of the optical image-taking lenses of embodiments 3 and 4 are shown, which represent the distortion size values corresponding to different image heights. According to Figures 9 to 11It can be seen that the optical imaging lenses given in Embodiments 3 and 4 can achieve good imaging quality.

[0134] Example 5

[0135] The following is for reference Figure 12 Describes the optical imaging lens according to Embodiment 5 of this application. Figure 12 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown.

[0136] In this embodiment, the optical imaging lens includes a first lens barrel P0a and a second lens barrel P0b arranged sequentially from the object side to the image side along the optical axis, and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis. The first lens E1, the second lens E2 and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5 and the sixth lens E6 are assembled in the second lens barrel P0b.

[0137] In this embodiment, the optical imaging lens further includes a plurality of non-transparent elements: a first positioning ring P1, located on the image side of the first lens E1, and its object side at least partially in contact with the first lens E1; a second positioning ring P2, located on the image side of the second lens E2, and its object side at least partially in contact with the second lens E2; a fourth positioning ring P4, located on the image side of the fourth lens E4, and its object side at least partially in contact with the fourth lens E4; a fifth positioning ring P5, located on the image side of the fifth lens E5, and its object side at least partially in contact with the fifth lens E5; a fifth spacer positioning ring P5b, located on the image side of the fifth positioning ring P5, and its object side at least partially in contact with the fifth positioning ring P5; and a fifth auxiliary positioning ring P5c, located on the image side of the fifth spacer positioning ring P5b, and its object side at least partially in contact with the fifth spacer positioning ring P5b.

[0138] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0139] In this embodiment, the optical image capturing lens can further include, for example, a filter located on the image side of the sixth lens E6, and an image plane located on the image side of the filter, and light from an object can pass through, for example, the surfaces S1-S15 and the filter in sequence and finally be imaged on the image plane.

[0140] Table 6 shows the basic parameters of the optical image capturing lens of embodiment 5, wherein the units of the radius of curvature, the thickness / distance are all in millimeter (mm).

[0141]

[0142]

[0143] Table 6

[0144] The optical image capturing lens according to this embodiment can achieve zooming by changing the lens spacing, i.e., at least some of the values in the column of 'thickness / distance' in Table 6 representing the distance between lenses can be changed. For example, the value 0.4662 in the row of S6 corresponding to the column of 'thickness / distance' representing the distance on the optical axis between the image side surface of the third lens E3 and the stop STO and / or the value -0.0524 in the row of STO corresponding to the column of 'thickness / distance' representing the distance on the optical axis between the stop STO and the object side surface of the fourth lens E4 can be changed. The optical image capturing lens according to this embodiment can achieve zooming in the range of 5.92mm to 6.80mm.

[0145] In this embodiment, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and each aspherical surface can be defined by the formula (1) given in embodiment 1 above, and Table 7-1 and Table 7-2 show the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30, A32, A34, A36, A38, A40, A42, A44, A46, A48, A50, A52, A54, A56, A58, A60, A62, A64, A66, A68, A70, A72, A74, A76, A78, A80, A82, A84, A86, A88, A90, A92, A94, A96, A98, and A100 of the aspherical surfaces S1-S12 that can be used in this embodiment. 10 12 14 16 18 20 22 24 26 28 30 .

[0146] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.2213E-01 4.1941E-04 -3.6475E-03 -1.6875E-03 -7.1541E-04 -1.2538E-04 -6.8181E-05 S2 1.3862E-02 -7.8156E-03 -4.4278E-03 1.1562E-03 -9.0416E-05 -9.7867E-05 1.2892E-05 S3 -4.5067E-02 6.1093E-03 1.7882E-04 1.3597E-03 5.1328E-04 -4.0803E-04 1.3566E-04 S4 6.8228E-02 1.2711E-02 1.0732E-03 4.3696E-03 4.4102E-05 -1.2987E-04 2.7331E-05 S5 1.8411E-01 -2.0475E-02 -2.6463E-04 2.2632E-03 -1.1065E-03 1.7218E-04 2.9442E-05 S6 2.5297E-02 1.1770E-02 4.2947E-03 1.4566E-03 5.4527E-04 1.8178E-04 5.2706E-05 S7 1.0254E-01 8.7142E-03 -4.1817E-03 2.5247E-03 -1.3000E-03 6.5985E-04 -3.0557E-04 S8 -2.3033E-01 -1.2197E-02 -1.6162E-02 -2.7783E-03 -2.3426E-03 3.3106E-04 6.2058E-06 S9 -2.0107E-01 -1.0455E-02 -6.9671E-03 -2.2013E-03 -1.5979E-03 -2.0889E-04 -1.2081E-04 S10 -6.2868E-01 6.7362E-02 -3.0257E-02 2.1873E-03 -1.8950E-03 1.4554E-03 -9.0679E-04 S11 -4.5562E-01 1.0005E-01 1.4652E-01 3.1372E-02 -4.2116E-02 1.7831E-02 9.1317E-03 S12 -1.6176E+00 1.8202E-01 -4.5083E-02 2.3815E-02 -5.0260E-03 1.1803E-03 -7.8973E-04

[0147] Table 7-1

[0148]

[0149]

[0150] Table 7-2​​​​​​​​​​

[0151] Referring to Table 8, the values of the relevant parameters in this embodiment are shown in the row of ‘Embodiment 5’ in Table 8 respectively, in which the specific description of the meaning represented by each parameter is the same as described in Embodiment 1 above, and will not be repeated here.

[0152] Example 6

[0153] The optical image-taking lens according to Embodiment 6 of the present application is described below, Figure 13 The structure diagram of the optical image-taking lens according to Embodiment 6 of the present application is shown. Figure 13 The structure diagram of the optical image-taking lens according to Embodiment 6 of the present application is shown.

[0154] In this embodiment, the optical image-taking lens also includes, in the same manner as in Embodiment 5, the first lens barrel P0a and the second lens barrel P0b arranged in sequence along the optical axis from the object side to the image side, and the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5 and the sixth lens E6 also arranged in sequence along the optical axis from the object side to the image side, wherein the first lens E1, the second lens E2 and the third lens E3 are assembled in the first lens barrel P0a, and the fourth lens E4, the fifth lens E5 and the sixth lens E6 are assembled in the second lens barrel P0b.

[0155] In this embodiment, the optical image-taking lens also includes, in the same manner as in Embodiment 5, the first positioning ring P1 located on the image side of the first lens E1 and having its object side surface at least partially in contact with the first lens E1, the second positioning ring P2 located on the image side of the second lens E2 and having its object side surface at least partially in contact with the second lens E2, the fourth positioning ring P4 located on the image side of the fourth lens E4 and having its object side surface at least partially in contact with the fourth lens E4, the fifth positioning ring P5 located on the image side of the fifth lens E5 and having its object side surface at least partially in contact with the fifth lens E5, the fifth spacer positioning ring P5b located on the image side of the fifth positioning ring P5 and having its object side surface at least partially in contact with the fifth positioning ring P5, and the fifth auxiliary positioning ring P5c located on the image side of the fifth spacer positioning ring P5b and having its object side surface at least partially in contact with the fifth spacer positioning ring P5b.

[0156] Moreover, the basic parameter table of the optical image-taking lens of this embodiment is the same as Table 6, and the high-order term coefficient table of the aspheric surface is the same as Table 7-1 and Table 7-2. The optical image-taking lens according to this embodiment can also realize zooming in the range of 5.92 mm to 6.80 mm.

[0157] The difference between this embodiment and Embodiment 5 is that the values of the relevant parameters shown in Table 8 are different, and the values of the parameters in this embodiment are shown in the row of ‘Embodiment 6’ in Table 8. Among them, the specific description of the meaning represented by each parameter is the same as described in Embodiment 1 above, and will not be repeated here.

[0158] Figures 14 to 16 The performance curves of the optical image capturing lens of embodiments 5 and 6 at the maximum focal length are shown, wherein, Figure 14 The axial chromatic aberration curves of the optical image capturing lens of embodiments 5 and 6 are shown, which represent the deviation of the converging focal points of light rays of different wavelengths after passing through the lens; Figure 15 The astigmatism curves of the optical image capturing lens of embodiments 5 and 6 are shown, which represent the meridional image surface curvature and sagittal image surface curvature; Figure 16 The distortion curves of the optical image capturing lens of embodiments 5 and 6 are shown, which represent the distortion size values corresponding to different image heights. According to Figures 14 to 16 It can be seen that the optical image capturing lens given by embodiments 5 and 6 can achieve good imaging quality.

[0159] Example / parameter La Lb D2s d2s D4s d4s D0m D4m d4m D1m d1m D2m d2m Example 1 2.565 2.620 4.640 2.603 4.306 2.670 5.874 4.306 2.670 4.480 2.937 4.640 2.603 Example 2 2.570 2.620 4.600 2.603 4.950 2.670 6.450 4.950 2.670 3.688 2.972 4.600 2.603 Example 3 2.580 2.640 3.662 2.631 4.950 2.597 6.450 4.950 2.597 4.480 3.020 3.662 2.631 Example 4 2.585 2.622 4.580 2.631 4.514 2.597 6.373 4.514 2.597 3.691 3.000 4.580 2.631 Example 5 2.650 2.477 4.480 2.970 4.910 2.596 6.274 4.910 2.560 4.480 3.006 4.480 3.006 Example 6 2.642 2.470 4.620 2.560 3.937 2.540 6.450 3.937 2.540 4.520 2.960 4.620 2.560

[0160] Table 8

[0161] In addition, in embodiments 1 to 6, the numerical range (minimum value-maximum value) of the effective focal length f of the optical image capturing lens, the effective focal lengths f1 to f6 of the first lens to the sixth lens, and the combined focal length f123 of the first lens, the second lens and the third lens are respectively shown in Table 9 as follows.

[0162] Example / parameter f (mm) f1 (mm) f2 (mm) f3 (mm) f4 (mm) f5 (mm) f6 (mm) f123 (mm) Example 1 5.93-6.80 4.01 -6.24 5.54 -10.39 -18.45 -9.52 4.10 Example 2 5.93-6.80 4.01 -6.24 5.54 -10.39 -18.45 -9.52 4.10 Example 3 5.85-6.80 3.87 -6.10 5.83 -10.24 -16.46 -10.73 4.12 Example 4 5.85-6.80 3.87 -6.10 5.83 -10.24 -16.46 -10.73 4.12 Example 5 5.92-6.80 3.91 -5.97 5.84 -11.52 -16.59 -10.22 4.22 Example 6 5.92-6.80 3.91 -5.97 5.84 -11.52 -16.59 -10.22 4.22

[0163] Table 9

[0164] Embodiments 1 to 6 respectively satisfy the conditions shown in Table 10.

[0165] Conditional expression / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 D2s / d2s x CT2 / T12 8.2001 8.1294 6.0926 7.6201 5.7241 6.8491 f1 / R2 -0.0901 -0.0901 -0.1515 -0.1515 -0.0817 -0.0817 f2 / R4 -1.5044 -1.5044 -1.7562 -1.7562 -1.9155 -1.9155 La / TTL 0.3761 0.3768 0.3783 0.3790 0.3886 0.3873 (CT3+CT4+CT5) / Lb 0.4912 0.4912 0.5127 0.5163 0.5423 0.5438 La / Lb x fmin / f123 1.4172 1.4200 1.3876 1.4000 1.5007 1.5002 f2 x (D2m+d2m) / (D2m-d2m) (mm) -22.1774 -22.4967 -37.2466 -22.5766 -30.3233 -20.8054 CT1 / T12 19.6343 19.6343 20.2820 20.2820 17.9767 17.9767 D1m / d1m 1.5251 1.2409 1.4833 1.2301 1.4902 1.5270 f4 / f5 0.5630 0.5630 0.6223 0.6223 0.6943 0.6943 D4s / d4s 1.6129 1.8542 1.9060 1.7382 1.8914 1.5499 fmin / D0m 1.0101 0.9198 0.9066 0.9175 0.9434 0.9176 N5 / N4 x D4m / d4m 1.7066 1.9619 1.9552 1.7830 1.9675 1.5899

[0166] Table 10

[0167] The present application also provides an imaging device provided with an electronic photosensitive element for imaging, which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment 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 image capturing lens described above.

[0168] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the protective scope of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by the combinations 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 the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. An optical image-taking lens, characterized in that, include: Multiple light-transmitting elements and at least one light-blocking element, The plurality of light-transmitting elements include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side; The first lens has positive optical power, and its object side is convex and its image side is convex; the second lens has an object side convex and its image side concave; the sixth lens has negative optical power. The at least one non-transparent element includes: a second positioning ring located on the image side of the second lens and having its object side at least partially in contact with the second lens; and The optical imaging lens satisfies: -0.18 <f1 / R2<-0.05, -1.95 <f2 / R4≤-1.1, 5.70 <D2s / d2s×CT2 / T12<8.23, Wherein, f1 is the effective focal length of the first lens, R2 is the radius of curvature of the image side of the first lens, f2 is the effective focal length of the second lens, R4 is the radius of curvature of the image side of the second lens, D2s is the outer diameter of the object side of the second positioning ring, d2s is the inner diameter of the object side of the second positioning ring, CT2 is the center thickness of the second lens on the optical axis, and T12 is the distance between the first lens and the second lens on the optical axis.

2. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also includes a first lens barrel and a second lens barrel arranged sequentially from the object side to the image side along the optical axis; The first lens, the second lens, and the third lens are assembled in the first lens barrel, and the fourth lens, the fifth lens, and the sixth lens are assembled in the second lens barrel; The optical imaging lens can achieve zoom by changing the distance between the third lens and the fourth lens on the optical axis.

3. The optical imaging lens according to claim 2, characterized in that, The maximum height La of the first lens barrel along the optical axis and the distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens along the optical axis satisfy the following: 0.35 <La / TTL<0.4。 4. The optical imaging lens according to claim 2, characterized in that, The center thickness CT3 of the third lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the center thickness CT5 of the fifth lens on the optical axis satisfy the following conditions: 0.45 < (CT3 + CT4 + CT5) / Lb < 0.

57.

5. The optical imaging lens according to claim 2, characterized in that, The maximum height La of the first lens barrel along the optical axis, the maximum height Lb of the second lens barrel along the optical axis, the minimum effective focal length fmin of the optical imaging lens, and the combined focal length f123 of the first lens, the second lens, and the third lens satisfy the following: La / Lb×fmin / f123<2.

6. The optical imaging lens according to claim 5, characterized in that, Satisfies: 1.35 <La / Lb×fmin / f123<1.53。 7. The optical imaging lens according to claim 2, characterized in that, The minimum effective focal length fmin of the optical imaging lens and the outer diameter D0m of the image-side end face of the second lens barrel satisfy the following: 0.88 <fmin / D0m<1.05。 8. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The effective focal length f2 of the second lens, the outer diameter D2m of the image-side surface of the second positioning ring, and the inner diameter d2m of the image-side surface of the second positioning ring satisfy the following: -37.28mm <f2×(D2m+d2m) / (D2m-d2m)<-20.78mm。 9. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The at least one non-transparent element further includes: a first positioning ring located on the image side of the first lens, with its object side at least partially in contact with the first lens; The center thickness CT1 of the first lens on the optical axis, the outer diameter D1m of the image-side surface of the first positioning ring, and the inner diameter d1m of the image-side surface of the first positioning ring satisfy the following: 17.95 <CT1 / T12<20.3, 1.2 <D1m / d1m<1.56。 10. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The at least one non-transparent element further includes: a fourth positioning ring, located on the image side of the fourth lens, with its object side at least partially in contact with the fourth lens; The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the outer diameter D4s of the object side surface of the fourth positioning ring, and the inner diameter d4s of the object side surface of the fourth positioning ring satisfy the following: 0.53 <f4 / f5<0.72, 1.52 <D4s / d4s<1.94。 11. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The at least one non-transparent element further includes: a fourth positioning ring, located on the image side of the fourth lens, with its object side at least partially in contact with the fourth lens; The refractive index N5 of the fifth lens, the refractive index N4 of the fourth lens, the outer diameter D4m of the image-side surface of the fourth positioning ring, and the inner diameter d4m of the image-side surface of the fourth positioning ring satisfy the following: 1.55 <N5 / N4×D4m / d4m<2。 12. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The second lens has negative optical power; The third lens has positive optical power; The fourth lens has negative optical power; The fifth lens has negative optical power.

Images