Optical image pickup lens

Abstract

The present application discloses an optical imaging lens, which includes a plurality of light-transmitting elements and at least one non-light-transmitting element. The plurality of light-transmitting elements include first to sixth lenses arranged in sequence from the object side to the image side along the optical axis. The fourth lens has a negative focal power and its object side surface is concave, and the fifth lens has a negative focal power and its image side surface is concave; the at least one non-light-transmitting element includes a fifth positioning ring located on the image side of the fifth lens and whose object side surface is at least partially in contact with the fifth lens. The effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the outer diameter D5m of the image side surface of the fifth positioning ring, and the inner diameter d5m of the image side surface of the fifth positioning ring satisfy: -0.96 < f / f4 + f / f5 ≤ -0.7 and 5.3 < |f5| / (D5m - d5m) < 17.1.

Description

Technical Field

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

[0002] With the rapid development of the mobile phone industry, consumers' requirements for the camera function of mobile phones are getting higher and higher. Among them, telephoto lenses have received more and more extensive attention in recent years. Telephoto lenses have many characteristics. They can ignore the redundant pictures and highlight the main body, can拉近 the spatial distance between the near view and the far view, creating a strong sense of compression. When highlighting the main body, consumers' requirements for the image quality of telephoto lenses are getting higher and higher, and they attach more importance to the photographing quality. However, telephoto lenses usually cause more stray light, affecting the imaging quality and lens quality, which亟待解决. Summary of the Invention

[0003] This application provides an optical imaging lens, which may include a plurality of light-transmitting elements and at least one non-light-transmitting element. The plurality of light-transmitting elements may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative focal power and the object side surface is concave, and the fifth lens has a negative focal power and the image side surface is concave; at least one non-light-transmitting element may include a fifth positioning ring located on the image side of the fifth lens and the object side surface of which is at least partially in contact with the fifth lens. The optical imaging lens can satisfy: -0.96 < f / f4 + f / f5 ≤ -0.7 and 5.3 < |f5| / (D5m - d5m) < 17.1, where f is the effective focal length of the optical imaging lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, D5m is the outer diameter of the image side surface of the fifth positioning ring, and d5m is the inner diameter of the image side surface of the fifth positioning ring.

[0004] In one embodiment, the central thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP5 of the fifth positioning ring, and the refractive index N5 of the fifth lens may satisfy: 1.48 < CT5 / CP5 × N5 < 32.7.

[0005] In one embodiment, at least one non-light-transmitting element may further include a first positioning ring located on the image side of the first lens and the object side surface of which is at least partially in contact with the first lens, and a second positioning ring located on the image side of the second lens and the object side surface of which is at least partially in contact with the second lens; the curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens may satisfy: -3.2 < R3 / R4 < -0.53; the distance EP12 between the first positioning ring and the second positioning ring on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 2.2 < EP12 / CT2 < 2.

[0006]

[0006] It should be noted that there is an unclear expression "亟待解决" in the original text which may need to be further clarified for a more accurate translation. Also, there seems to be a formatting issue in the "2.

[0006] " part in the last line of the translation which might need to be corrected.In one embodiment, at least one non-transparent element may further include a fourth positioning ring located on the image side of the fourth lens and whose object side is at least partially in contact with the fourth lens; the surface reflectivity of the fourth positioning ring in the visible light range is less than or equal to 3%; the outer diameter D4m of the image side of the fourth positioning ring and the inner diameter d4m of the image side of the fourth positioning ring may satisfy: 30.45mm. 2 <(D4m 2 -d4m 2 )×π<54.05mm 2 .

[0007] In one embodiment, at least one non-transparent element may further include a first positioning ring located on the image side of the first lens and whose object side is at least partially in contact with the first lens; the radius of curvature R2 of the image side of the first lens, the outer diameter D1m of the image side of the first positioning ring, and the inner diameter d1m of the image side of the first positioning ring may satisfy: -13.45 <R2 / (D1m-d1m)<-11.25。

[0008] In one embodiment, at least one non-transparent element may further include a second positioning ring located on the image side of the second lens and whose object side is at least partially in contact with the second lens; the axial distance SAG31 from the intersection of the inner diameter d2m of the image side of the second positioning ring and the intersection of the object side of the third lens and the optical axis to the vertex of the effective radius of the object side of the third lens may satisfy: 24.2 <d2m / |SAG31|<27.45。

[0009] In one embodiment, at least one non-transparent element may further include a first positioning ring located on the image side of the first lens and whose object side is at least partially in contact with the first lens, and a second positioning ring located on the image side of the second lens and whose object side is at least partially in contact with the second lens; the maximum thickness CP2 of the second positioning ring, the maximum thickness CP1 of the first positioning ring, the air gap T23 between the second and third lenses on the optical axis, and the air gap T12 between the first and second lenses on the optical axis may satisfy: 2.7 <CP2 / CP1×T23 / T12<5.9。

[0010] In one embodiment, the optical imaging lens may further include a first lens barrel and a second lens barrel arranged sequentially from the object side to the image side along the optical axis; a first lens, a second lens and a third lens are mounted in the first lens barrel, and a fourth lens, a fifth lens and a sixth lens are mounted 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.

[0011] In one embodiment, the maximum height Lb of the second lens barrel, the maximum height La of the first lens barrel, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, the Abbe number V6 of the sixth lens, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the Abbe number V3 of the third lens may satisfy: 1.25 < Lb / La × (V4 + V5 + V6) / (V1 + V2 + V3) < 1.45.

[0012] In one embodiment, the central thickness CT3 of the third lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, and the maximum height Lb of the second lens barrel may satisfy: 0.4 < (CT3 + CT4 + CT5) / Lb < 0.55.

[0013] The optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative optical power and its object side is concave, and the fifth lens has a negative optical power and its image side is concave; the optical imaging lens further includes a non-light-transmitting element: a fifth positioning ring located on the image side of the fifth lens and having its object side at least partially in contact with the fifth lens; and, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: -0.96 < f / f4 + f / f5 ≤ -0.7; the effective focal length f5 of the fifth lens, the outer diameter D5m of the image side of the fifth positioning ring, and the inner diameter d5m of the image side of the fifth positioning ring satisfy: 5.3 < |f5| / (D5m - d5m) < 17.1. By setting the lens in this way, it is more conducive to controlling the light convergence of the fifth lens, conducive to controlling the internal reflection stray light generated by the fifth lens, and conducive to reducing the edge stray light. At the same time, the interval between the fifth lens and the sixth lens can be controlled, making the annular stray light space smaller, enabling the reflected light between the fifth and sixth lenses to be effectively blocked or intercepted by the fifth positioning ring, and conducive to controlling the internal reflection stray light generated by the sixth lens, which is beneficial to improving the quality of the system annular stray light. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] With reference to the accompanying drawings, through the following detailed description of non-limiting embodiments, other features, objects, and advantages of the present application will become more apparent. In the drawings:

[0015] Figure 1 shows a schematic diagram of the structure and partial parameter dimensions of an optical imaging lens according to an exemplary embodiment of the present application;

[0016] Figure 2 tshows a schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of the present application;

[0017] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0018] Figure 4 , Figure 5 and Figure 6 The astigmatism curve, distortion curve, and on-axis chromatic aberration curve of the optical imaging lenses according to Embodiments 1 and 2 of this application are shown respectively.

[0019] Figure 7 A schematic diagram of the structure of the optical imaging lens according to Embodiment 3 of this application is shown;

[0020] Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0021] Figure 9 , Figure 10 and Figure 11 The astigmatism curve, distortion curve and on-axis chromatic aberration curve of the optical imaging lens according to Embodiments 3 and 4 of this application are shown respectively.

[0022] Figure 12 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0023] Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0024] Figure 14 , Figure 15 and Figure 16 The astigmatism curve, distortion curve and on-axis chromatic aberration curve of the optical imaging lens according to Embodiments 5 and 6 of this application are shown respectively.

[0025] Figure 17 A schematic diagram illustrating the causes of stray light in an optical imaging lens according to an exemplary embodiment of this application is shown;

[0026] Figure 18 A diagram showing the stray light condition of an optical imaging lens before improvement according to an exemplary embodiment of this application is provided.

[0027] Figure 19 A diagram showing the stray light condition of an optical imaging lens before improvement according to another exemplary embodiment of this application is shown;

[0028] Figure 20 A diagram showing improved stray light conditions of an optical imaging lens according to yet another exemplary embodiment of this application is illustrated; and

[0029] Figure 21 Another structural schematic diagram of an optical imaging lens according to an exemplary embodiment of this application is shown. Detailed Implementation

[0030] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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.

[0031] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0032] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0033] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject along the optical path is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane along the optical path is called the image-side surface of the lens. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0034] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0035] Unless otherwise defined, all terms (including technical and scientific terms) used herein shall 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 commonly used dictionaries, 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 formalized sense unless expressly so defined herein.

[0036] 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 embodiments merely represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. The following will refer to the accompanying drawings and combine with embodiments to detail this application.

[0037] The features, principles, and other aspects of this application will be described in detail below.

[0038] The optical imaging lens according to an exemplary embodiment of this application may include a plurality of light-transmitting elements and at least one non-light-transmitting element. The plurality of light-transmitting elements may include, for example, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis.

[0039] In an exemplary embodiment, the fourth lens may have a negative optical power, and its object side surface may be concave. The fifth lens may have a negative optical power, and its image side surface may be concave.

[0040] In an exemplary embodiment, at least one non-light-transmitting element may include a fifth positioning ring located on the image side of the fifth lens and having its object side surface in at least partial contact with the fifth lens.

[0041] In an exemplary embodiment, the optical imaging lens may achieve zooming by changing the on-axis distance between at least some of the first lens to the sixth lens. For example, the optical imaging lens may achieve zooming by changing the distance between the third lens and the fourth lens on the optical axis.

[0042] In an exemplary embodiment, the optical imaging lens of this application may satisfy the conditional formula -0.96 < f / (f4 + f5) ≤ -0.7, where f is the effective focal length of the optical imaging lens, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

[0043] In an exemplary embodiment, the optical imaging lens of the present application satisfies the condition 5.3 < |f5| / (D5m - d5m) < 17.1, where f5 is the effective focal length of the fifth lens, D5m is the outer diameter of the image side of the fifth positioning ring, and d5m is the inner diameter of the image side of the fifth positioning ring.

[0044] The optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative optical power and its object side is concave, and the fifth lens has a negative optical power and its image side is concave; the optical imaging lens further includes a non-light-transmitting element: a fifth positioning ring located on the image side of the fifth lens and at least partially contacting the object side of the fifth lens; and, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: -0.96 < f / f4 + f / f5 ≤ -0.7; the effective focal length f5 of the fifth lens, the outer diameter D5m of the image side of the fifth positioning ring, and the inner diameter d5m of the image side of the fifth positioning ring satisfy: 5.3 < |f5| / (D5m - d5m) < 17.1. By such a setting of the lens, it is more beneficial to control the light convergence of the fifth lens, is beneficial to controlling the internal reflection stray light generated by the fifth lens, and is beneficial to reducing the edge stray light. At the same time, the interval between the fifth lens and the sixth lens can be controlled, making the annular stray light space smaller, enabling the reflected light between the fifth and sixth lenses to be effectively blocked or intercepted by the fifth positioning ring, and being beneficial to controlling the internal reflection stray light generated by the sixth lens, which is beneficial to improving the quality of the system's annular stray light.

[0045] Attached Figure 17 FIG. shows a schematic diagram of the causes of possible stray light at the positions of the fifth lens and the sixth lens in the optical imaging lens. According to Figure 17 It can be seen that reasonably controlling the interval between the fifth lens and the sixth lens and reasonably setting the fifth positioning ring can be beneficial to controlling the generation of annular stray light at the positions of the fifth lens and the sixth lens. The optical imaging lens according to the embodiment of Example 1 satisfies the conditional formula f / f4 + f / f5 = -0.73 and |f5| / (D5m - d5m) = 4.6. The stray light situation of the optical imaging lens according to the embodiment of Example 1 is as Figure 18 shown; the optical imaging lens according to the embodiment of Example 2 satisfies the conditional formula f / f4 + f / f5 = -0.7 and |f5| / (D5m - d5m) = 18.3. The stray light situation of the optical imaging lens according to the embodiment of Example 2 is as Figure 19 shown; the optical imaging lens according to the embodiment of Example 3 satisfies the conditional formula f / f4 + f / f5 = -0.81 and |f5| / (D5m - d5m) = 8.5. The stray light situation of the optical imaging lens according to the embodiment of Example 3 is as Figure 20As shown. In comparison, Figure 20 The stray light situation of the optical imaging lens according to the embodiment of Example 3 is significantly better than that shown. Figure 18 and Figure 19 The stray light conditions of the optical imaging lenses according to the embodiments of Examples 1 and 2 are shown, and the ring stray light of the lens in Example 3 is significantly reduced. Therefore, it can be seen that while the value of the control condition f / f4+f / f5 is greater than -0.96 and less than or equal to -0.7, by controlling the value of the control condition |f5| / (D5m-d5m) to be greater than 5.3 and less than 17.1, it is more beneficial to control the light convergence of the fifth lens, to control the internal reflection stray light generated by the fifth lens, and to reduce edge stray light. Simultaneously, it allows for reasonable control of the spacing between the fifth and sixth lenses, making the ring stray light space smaller, allowing the reflected light between the fifth and sixth lenses to be effectively blocked or intercepted by the fifth positioning ring, and further improving the quality of the ring stray light in the lens by controlling the internal reflection stray light generated by the sixth lens.

[0046] In an exemplary embodiment, the optical imaging lens may further include a first lens barrel and a second lens barrel arranged sequentially along the optical axis from the object side to the image side. A first lens, a second lens, and a third lens may be mounted in the first lens barrel; a fourth lens, a fifth lens, and a sixth lens may be mounted in the second lens barrel. The central axes of the first and second lens barrels may, for example, be located on a straight line. Exemplarily, the central axes of the first and second lens barrels may be on the same straight line as the optical axis of the optical imaging lens / the optical axis of the multiple light-transmitting elements. By appropriately configuring the first and second lens barrels, for example, aligning their central axes on a straight line, it is more advantageous to control the eccentricity of the lens barrel and lens assembly, improving assembly consistency and stability, and thus increasing yield.

[0047] In an exemplary embodiment, the optical imaging lens can achieve a zoom effect by changing the spacing between the lenses. For example, the optical imaging lens can achieve zoom by changing the spacing between the third and fourth lenses on the optical axis. As another example, the optical imaging lens can achieve zoom by adjusting the spacing between the first lens barrel equipped with the first to third lenses and the second lens barrel equipped with the fourth to sixth lenses. In this way, the focusing of the telephoto lens can be controlled, facilitating the switching between telephoto and near-photo focus, and enabling different focusing effects of the optical imaging lens.

[0048] In an exemplary embodiment, the optical imaging lens may also include a lens barrel, in which the first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens can all be mounted, for example... Figure 21As shown, the first to sixth lenses E1 - E6 are all assembled in the lens barrel P0. The first lens to the sixth lens can be arranged in sequence along the optical axis from the object side to the image side. The optical imaging lens may further include at least one non - light - transmitting element.

[0049] In an exemplary embodiment, there may be an air gap between each adjacent two of the first lens to the sixth lens. The number of lenses with optical power in the optical imaging lens is, for example, six.

[0050] In an exemplary embodiment, at least one non - light - transmitting element may further include a first positioning ring located on the image side of the first lens and whose object - side surface is at least partially in contact with the first lens.

[0051] In an exemplary embodiment, at least one non - light - transmitting element may further include a second positioning ring located on the image side of the second lens and whose object - side surface is at least partially in contact with the second lens.

[0052] In an exemplary embodiment, at least one non - light - transmitting element may further include a fourth positioning ring located on the image side of the fourth lens and whose object - side surface is at least partially in contact with the fourth lens.

[0053] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the condition 1.48 < CT5 / CP5×N5 < 32.7, where CT5 is the central thickness of the fifth lens on the optical axis, CP5 is the maximum thickness of the fifth positioning ring (which can be the maximum thickness of the fifth positioning ring along the optical axis or in a direction parallel to the optical axis), and N5 is the refractive index of the fifth lens. By controlling the lens to satisfy the condition 1.48 < CT5 / CP5×N5 < 32.7, it is more conducive to the molding of the fifth lens and the improvement of stray light. By controlling the central thickness and refractive index of the fifth lens, it helps to ensure the molding of the fifth lens, can control the internal reflection stray light generated by the fifth lens, and at the same time, by controlling the maximum thickness of the fifth positioning ring, it helps to control the gap between the fifth lens and the fifth positioning ring, giving the fifth positioning ring a greater space for improving stray light.

[0054] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional expressions -3.2 < R3 / R4 < -0.53 and 2.2 < EP12 / CT2 < 2.65, where R3 is the radius of curvature of the object side surface of the second lens, R4 is the radius of curvature of the image side surface of the second lens, EP12 is the distance between the first positioning ring and the second positioning ring on the optical axis, and CT2 is the central thickness of the second lens on the optical axis. By controlling the lens to satisfy the conditional expressions -3.2 < R3 / R4 < -0.53 and 2.2 < EP12 / CT2 < 2.65, it is more conducive to controlling the reflected stray light between the first lens and the second lens and the internal reflected stray light generated by the second lens. By controlling the distance between the first positioning ring and the second positioning ring in the optical axis direction, the stray light occlusion of the second lens by the positioning ring can be controlled, which helps to improve the internal reflected stray light of the second lens. By controlling the radii of curvature of the object side surface and the image side surface of the second lens, the contour of the second lens can be controlled, which is conducive to controlling the internal reflected stray light generated by the second lens.

[0055] In an exemplary embodiment, the non-transmissive element in the optical imaging lens of the present application further includes a fourth positioning ring located on the image side of the fourth lens and having at least a part of its object side surface in contact with the fourth lens. The surface reflectivity of the fourth positioning ring in the visible light range is less than or equal to 3%; the outer diameter D4m and the inner diameter d4m of the image side surface of the fourth positioning ring can satisfy the conditional expression 30.45mm 2 <(D4m 2 -d4m 2 )×π < 54.05mm <(D4m 。By controlling this condition, it is more conducive to appropriately occluding the light of the lens by the fourth positioning ring and more conducive to controlling the stray light generated by the fourth positioning ring. By controlling the outer diameter and the inner diameter of the image side surface of the fourth positioning ring, the fit between the fourth positioning ring and the lens can be controlled, giving more space for the fourth positioning ring to improve the stray light generated by the lens; by controlling the surface reflectivity of the fourth positioning ring, the stray light generated by the positioning ring can be reduced. <00。By controlling this condition, it is more conducive to appropriately occluding the light of the lens by the fourth positioning ring and more conducive to controlling the stray light generated by the fourth positioning ring. By controlling the outer diameter and the inner diameter of the image side surface of the fourth positioning ring, the fit between the fourth positioning ring and the lens can be controlled, giving more space for the fourth positioning ring to improve the stray light generated by the lens; by controlling the surface reflectivity of the fourth positioning ring, the stray light generated by the positioning ring can be reduced. In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional expression -13.45 < R2 / (D1m - d1m) < -11.25, where R2 is the radius of curvature of the image side surface of the first lens, D1m is the outer diameter of the image side surface of the first positioning ring, and d1m is the inner diameter of the image side surface of the first positioning ring. By controlling the lens to satisfy the conditional expression -13.45 < R2 / (D1m - d1m) < -11.25, it is more conducive to controlling the internal reflected stray light generated by the first lens and the stray light incident from the first lens to the second lens, and at the same time is conducive to the overall contour of the first lens, which helps to control the improvement of the stray light of the first lens.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 24.2 < d2m / |SAG31| < 27.45, where d2m is the inner diameter of the image side of the second positioning ring, and SAG31 is the axial distance from the intersection of the object side of the third lens and the optical axis to the effective radius vertex of the object side of the third lens. By controlling the lens to satisfy the conditional formula 24.2 < d2m / |SAG31| < 27.45, it is more conducive to controlling the light leakage at the edge of the effective diameter of the third lens and the internal reflection stray light. The second positioning ring can block part of the light incident from the second lens to the third lens, which helps to reduce the internal reflection stray light of the third lens.

[0058] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 2.7 < CP2 / CP1 × T23 / T12 < 5.9, where CP2 is the maximum thickness of the second positioning ring, CP1 is the maximum thickness of the first positioning ring, T23 is the air gap between the second lens and the third lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis. The maximum thickness of the positioning ring can be the maximum thickness of the positioning ring along the optical axis or in a direction parallel to the optical axis. By controlling the lens to satisfy the conditional formula 2.7 < CP2 / CP1 × T23 / T12 < 5.9, it is beneficial to control the distances between the first lens, the second lens, and the third lens, and is conducive to improving the bearing stability between them.

[0059] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 1 < Lb / La × (V4 + V5 + V6) / (V1 + V2 + V3) < 2, where Lb is the maximum height of the second lens barrel along the optical axis or in a direction parallel to the optical axis, La is the maximum height of the first lens barrel along the optical axis or in a direction parallel to the optical axis, V4 is the dispersion coefficient of the fourth lens, V5 is the dispersion coefficient of the fifth lens, V6 is the dispersion coefficient of the sixth lens, V1 is the dispersion coefficient of the first lens, V2 is the dispersion coefficient of the second lens, and V3 is the dispersion coefficient of the third lens. By controlling the lens to satisfy the conditional formula 1.25 < Lb / La × (V4 + V5 + V6) / (V1 + V2 + V3) < 1.45, it is more conducive to controlling the height and total length of the lens, and helps to optimize the chromatic aberration of the lens.

[0060] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 0.4 < (CT3 + CT4 + CT5) / Lb < 0.55, where 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 or parallel to the optical axis. By controlling the lens to satisfy the condition 0.4 < (CT3 + CT4 + CT5) / Lb < 0.55, the reflected stray light generated by the third lens and the second lens barrel can be controlled, and the stray light generated by the first lens barrel and the second lens barrel can be reduced. By controlling the center thicknesses of the third lens, the fourth lens, and the fifth lens, the gap between the third lens and the second lens barrel can be controlled, which is beneficial for controlling the reflected stray light generated by the third lens and the second lens barrel.

[0061] In an exemplary embodiment, the first lens may have positive optical power, and its object-side surface may be convex, and its image-side surface may be convex. The second lens may have negative optical power, and its object-side surface may be concave, and its image-side surface may be concave. The third lens may have positive optical power, its object-side surface may be concave, and its image-side surface may be convex. The fourth lens may have negative optical power, its object-side surface may be concave, and its image-side surface may be either convex or concave. The fifth lens may have negative optical power, its object-side surface may be either convex or concave, and its image-side surface may be concave. The sixth lens may have negative optical power, its object-side surface may be concave, and its image-side surface may be concave.

[0062] In an exemplary embodiment, the optical imaging lens of this application may include a chamfered lens. The outer peripheral surface of the chamfered lens may have a chamfered portion and a non-chamfered portion, and the outer diameter of the chamfered portion of the lens may be smaller than the outer diameter of the non-chamfered portion of the lens. When the outer peripheral surface of the lens has a chamfered portion, the outer diameter / maximum outer diameter of the lens generally refers to the outer diameter / maximum outer diameter of the non-chamfered portion of the lens.

[0063] In an exemplary embodiment, the non-transparent element group may include a truncated positioning ring. The outer peripheral surface of the truncated positioning ring may have a truncated portion and a non-truncated portion, and the outer diameter of the truncated portion of the positioning ring may be smaller than the outer diameter of the non-truncated portion of the positioning ring. When the outer peripheral surface of the positioning ring has a truncated portion, the outer diameter / maximum outer diameter of the positioning ring typically refers to the outer diameter / maximum outer diameter of the non-truncated portion of the positioning ring.

[0064] In an exemplary embodiment, the optical imaging lens of this application may include at least one aperture stop. The aperture stop can constrain the optical path and control the light intensity. The aperture stop can be disposed at an appropriate position on the optical imaging lens; for example, the aperture stop can be disposed between the third lens and the fourth lens.

[0065] In an exemplary embodiment, 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.

[0066] In an exemplary embodiment, among the respective surfaces of the first lens to the sixth lens, aspherical mirrors may be included. The aspherical mirrors have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. By using aspherical mirrors, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0067] According to the six-piece internal focusing telephoto optical imaging lens provided by the exemplary embodiment of the present application, the stray light is weakened by optimizing the lens structure, and the lens quality is improved.

[0068] On the one hand, the optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative optical power and its object side surface is concave, and the fifth lens has a negative optical power and its image side surface is concave; the optical imaging lens further includes a non-light-transmitting element: a fifth positioning ring located on the image side of the fifth lens and at least partially contacting the object side surface of the fifth lens; and, the effective focal length f of the optical imaging lens, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: -0.96 < f / f4 + f / f5 ≤ -0.7; the effective focal length f5 of the fifth lens, the outer diameter D5m of the image side surface of the fifth positioning ring, and the inner diameter d5m of the image side surface of the fifth positioning ring satisfy: 5.3 < |f5| / (D5m - d5m) < 17.1. By such a setting of the lens, it is more conducive to controlling the light convergence of the fifth lens, conducive to controlling the internal reflection stray light generated by the fifth lens, and conducive to reducing the edge stray light. At the same time, the interval between the fifth lens and the sixth lens can be controlled, making the annular stray light space smaller, enabling the reflected light between the fifth and sixth lenses to be effectively blocked or intercepted by the fifth positioning ring, and conducive to controlling the internal reflection stray light generated by the sixth lens, which is conducive to improving the quality of the system annular stray light.

[0069] On the other hand, the optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative focal power and its object side surface is concave, and the fifth lens has a negative focal power and its image side surface is concave; the optical imaging lens further includes a non-light-transmitting element: a fifth positioning ring located on the image side of the fifth lens and at least partially contacting the fifth lens with its object side surface; and, the center thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP5 of the fifth positioning ring, and the refractive index N5 of the fifth lens satisfy the conditional formula 1.48 < CT5 / CP5 × N5 < 32.7. Through this setting of the lens, it is more beneficial to the molding of the fifth lens and the improvement of stray light. By controlling the center thickness and refractive index of the fifth lens, it helps to ensure the molding of the fifth lens, can control the internal reflection stray light generated by the fifth lens, and at the same time control the maximum thickness of the fifth positioning ring, which helps to control the gap between the fifth lens and the fifth positioning ring, giving the fifth positioning ring a greater space for improving stray light.

[0070] On the other hand, the optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative focal power and its object side surface is concave, and the fifth lens has a negative focal power and its image side surface is concave; the optical imaging lens further includes a non-light-transmitting element: a fifth positioning ring located on the image side of the fifth lens and at least partially contacting the fifth lens with its object side surface, a first positioning ring located on the image side of the first lens and at least partially contacting the first lens with its object side surface, and a second positioning ring located on the image side of the second lens and at least partially contacting the second lens with its object side surface; and, the radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy the conditional formula -3.2 < R3 / R4 < -0.53, and the distance EP12 between the first positioning ring and the second positioning ring on the optical axis and the center thickness CT2 of the second lens on the optical axis satisfy the conditional formula 2.2 < EP12 / CT2 < 2.65. Through this setting of the lens, it is more beneficial to control the reflected stray light between the first lens and the second lens and the internal reflection stray light generated by the second lens. By controlling the distance between the first positioning ring and the second positioning ring in the optical axis direction, the stray light shielding of the second lens by the positioning ring can be controlled, which helps to improve the internal reflection stray light of the second lens. By controlling the radius of curvature of the object side surface and the image side surface of the second lens, the profile of the second lens can be controlled, which is beneficial to controlling the internal reflection stray light generated by the second lens.

[0071] On the other hand, the optical imaging lens according to an embodiment of the present application includes a plurality of light-transmitting elements: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Among them, the fourth lens has a negative focal power and its object side is concave, and the fifth lens has a negative focal power and its image side is concave; the optical imaging lens further includes non-light-transmitting elements: a fifth positioning ring located on the image side of the fifth lens and at least partially contacting the fifth lens with its object side, and a second positioning ring located on the image side of the second lens and at least partially contacting the second lens with its object side; and, the inner diameter d2m of the image side of the second positioning ring and the axial distance SAG31 from the intersection of the object side of the third lens and the optical axis to the effective radius vertex of the object side of the third lens satisfy the conditional formula 24.2 < d2m / |SAG31| < 27.45. With this setting of the lens, it is more conducive to controlling the light leakage at the edge of the effective diameter of the third lens and the internal reflection stray light. The second positioning ring can block part of the light incident on the third lens from the second lens, which helps to reduce the internal reflection stray light of the third lens.

[0072] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging lens and the division method of the lens groups can be changed, and the number of positioning rings can also be changed to obtain the various results and advantages described in this specification. The present application does not make specific limitations in this regard. For example, although six lenses and, for example, being divided into two lens groups are described as examples in the embodiment, the optical imaging lens is not limited to including six lenses, nor is it limited to being divided into the two exemplified lens groups. If necessary, the optical imaging lens may further include other numbers of lens groups and / or lenses. Again, for example, according to needs, the optical imaging lens may also include other numbers of positioning rings different from those described in the above embodiment.

[0073] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the drawings.

[0074] Example 1

[0075] The following refers to Figure 2 Describe the optical imaging lens according to Embodiment 1 of the present application, Figure 2 Fig. shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0076] 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.

[0077] 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 second spacer positioning ring P2b, located on the image side of the second positioning ring P2, and its object side at least partially in contact with the second positioning ring P2; a second auxiliary positioning ring P2c, located on the image side of the second spacer positioning ring P2b, and its object side at least partially in contact with the second spacer positioning ring P2b; 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; and 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.

[0078] 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 concave 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 concave and its image-side surface S12 being concave.

[0079] 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, for example, pass through each surface S1 to S12 and the filter in sequence and finally be imaged on the imaging surface.

[0080] Table 1 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).

[0081]

[0082] Table 1

[0083] 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 1 can be changed. For example, the value 0.4485 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 -0.0110 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 5.91mm to 6.80mm.

[0084] 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, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0085]

[0086] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; 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 i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A1, A2, A3, A4, A5, A6, A8, A1 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0087]

[0088]

[0089] Table 2-1

[0090] Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3931E-05 -9.4916E-06 8.3069E-06 -4.1416E-06 8.9745E-07 -1.3428E-06 5.0607E-06 S2 4.8546E-05 -1.8287E-05 1.5063E-05 9.3914E-06 2.6640E-06 -5.8260E-06 1.7206E-06 S3 5.1431E-05 -1.5456E-05 2.3331E-05 1.3817E-05 -2.9718E-06 -3.2431E-06 -1.8910E-06 S4 2.5853E-04 -1.1694E-04 1.1502E-04 1.1536E-05 -5.3628E-05 3.5273E-05 1.9819E-05 S5 2.4792E-06 3.3730E-05 -1.8476E-05 3.1178E-05 -5.3430E-06 -1.2639E-05 1.0490E-05 S6 7.1407E-06 -3.4270E-06 1.5341E-06 6.0527E-07 -3.5708E-06 -1.8787E-06 2.0215E-06 S7 7.3461E-06 4.6944E-06 -8.8012E-06 3.1828E-07 3.2673E-06 1.4738E-06 -1.3753E-06 S8 -1.7142E-04 1.7945E-04 -1.4457E-04 5.0201E-05 -1.0438E-05 4.2541E-05 4.1101E-07 S9 1.4616E-03 -9.3603E-04 2.9570E-04 -1.6129E-04 -1.7317E-07 0.0000E+00 0.0000E+00 S10 -1.4909E-04 3.1328E-05 1.8462E-05 7.8627E-05 1.9029E-05 2.5815E-05 0.0000E+00 S11 -3.1193E-03 -4.3570E-03 4.1389E-03 -3.5917E-04 -9.7552E-04 3.9720E-04 1.8061E-07 S12 -6.4389E-04 -1.1194E-03 -7.1399E-04 -5.4565E-04 -2.0652E-04 -9.0674E-05 0.0000E+00

[0091] Table 2-2

[0092] Referring to Table 7, the values ​​of several relevant parameters for the first lens barrel P0a, the second lens barrel P0b, and multiple non-transparent elements P1, P2, P4, P5, and the third lens E3 in this embodiment are shown in the 'Embodiment 1' column of Table 7. The specific descriptions of the multiple relevant parameters shown in Table 7 are as follows:

[0093] D5m is the outer diameter of the image-side surface of the fifth positioning ring P5, d5m is the inner diameter of the image-side surface of the fifth positioning ring P5, CP5 is the maximum thickness of the fifth positioning ring P5, EP12 is the distance between the first positioning ring P1 and the second positioning ring P2 on the optical axis, D4m is the outer diameter of the image-side surface of the fourth positioning ring P4, d4m is the inner diameter of the image-side surface of the fourth positioning ring P4, D1m is the outer diameter of the image-side surface of the first positioning ring P1, d1m is the inner diameter of the image-side surface of the first positioning ring P1, d2m is the inner diameter of the image-side surface of the second positioning ring P2, SAG31 is the axial distance from the intersection of the object-side surface of the third lens E3 and the optical axis to the vertex of the effective radius of the object-side surface of the third lens E3, La is the maximum height of the first lens barrel P0a, Lb is the maximum height of the second lens barrel P0b, CP2 is the maximum thickness of the second positioning ring P2, and CP1 is the maximum thickness of the first positioning ring P1.

[0094] The units for all parameters shown in Table 7 are millimeters (mm). The schematic diagrams of these parameters in the optical imaging lens structure are as follows: Figure 1 As shown.

[0095] Example 2

[0096] 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.

[0097] 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.

[0098] In this embodiment, similar to Embodiment 1, the optical imaging lens also 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.

[0099] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 1, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 2-1 and 2-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.91mm to 6.80mm.

[0100] The difference between this embodiment and Embodiment 1 lies in the different values ​​of at least some of the relevant parameters shown in Table 7. The values ​​of each parameter in this embodiment are shown in the 'Embodiment 2' column of Table 7. The specific descriptions of the meanings represented by each parameter are the same as those in Embodiment 1 above, and will not be repeated here.

[0101] Figures 4 to 6 The performance curves of the optical imaging lenses in Examples 1 and 2 at their maximum focal length are shown, wherein, Figure 4 The astigmatism curves of the optical imaging lenses of Embodiments 1 and 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 5 The distortion curves of the optical imaging lenses of Embodiment 1 and Embodiment 2 are shown, which represent the distortion magnitude values ​​corresponding to different image heights; Figure 6 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 1 and 2 are shown, representing the deviation of light of different wavelengths from the converging focal point after passing through the lens. According to... Figures 4 to 6 It can be seen that the optical imaging lenses given in Embodiments 1 and 2 can achieve good imaging quality.

[0102] Example 3

[0103] The following is for reference Figure 7 Describes the optical imaging lens according to Embodiment 3 of this application. Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0104] 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.

[0105] 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.

[0106] 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 concave 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.

[0107] 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, for example, pass through each surface S1 to S12 and the filter in sequence and finally be imaged on the imaging surface.

[0108] Table 3 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).

[0109]

[0110] Table 3

[0111] 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 3 can be changed. For example, the value 0.4010 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 stop STO, and / or the value 0.0180 in row STO corresponding to the 'Thickness / Distance' column, representing the distance on the optical axis between the aperture stop 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 5.94mm to 6.80mm.

[0112] 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 4-1 and 4-2 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 .

[0113]

[0114]

[0115] Table 4-1

[0116] Face number A18 A20 A22 A24 A26 A28 A30 S1 2.5857E-05 -2.1791E-05 1.9597E-05 -6.3509E-06 1.0546E-05 9.7416E-07 1.7306E-06 S2 2.7131E-05 6.1568E-06 2.6970E-06 -3.8830E-06 9.9040E-06 2.8127E-06 -7.9946E-08 S3 2.6941E-05 4.1343E-06 8.7878E-06 2.0958E-06 4.4706E-06 9.9667E-07 -4.8648E-06 S4 3.6440E-04 -1.6791E-04 9.2443E-05 -1.2637E-05 -1.1599E-05 4.8908E-05 -1.5139E-05 S5 3.4609E-05 2.6023E-05 5.3670E-06 -1.8581E-05 2.0649E-05 -1.7215E-05 -5.3705E-06 S6 2.0687E-05 6.0392E-06 -2.9676E-06 7.5913E-07 -1.6608E-06 6.6433E-07 0.0000E+00 S7 2.2782E-05 -4.5741E-06 -1.7845E-06 -3.7649E-08 1.3847E-06 -5.0188E-07 0.0000E+00 S8 -5.4231E-05 2.3893E-04 -7.6477E-05 5.1663E-05 2.2771E-05 2.7043E-05 9.2391E-08 S9 4.4975E-05 3.9228E-05 1.0745E-05 1.5755E-05 8.2132E-06 3.9601E-06 0.0000E+00 S10 1.6882E-04 9.0337E-05 2.9640E-05 -1.5391E-05 -4.5181E-05 0.0000E+00 0.0000E+00 S11 -1.6316E-04 1.2662E-04 1.6602E-04 -4.7442E-05 -1.6835E-04 -1.0272E-04 0.0000E+00 S12 -2.9528E-03 -2.3781E-03 -1.2429E-03 -5.1565E-04 -1.2924E-04 -2.1257E-05 0.0000E+00

[0117] Table 4-2

[0118] Referring to Table 7, the values ​​of each relevant parameter in this embodiment are shown in the 'Example 3' column of Table 7. The specific description of the meaning of each parameter is the same as that in Example 1 above, and will not be repeated here.

[0119] Example 4

[0120] The following is for reference Figure 8 The optical imaging lens according to Embodiment 4 of this application is described. Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown.

[0121] In this embodiment, similar to Embodiment 3, 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.

[0122] In this embodiment, similar to Embodiment 3, the optical imaging lens also 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.

[0123] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 3, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 4-1 and 4-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.94mm to 6.80mm.

[0124] The difference between this embodiment and Embodiment 3 lies in the different values ​​of the relevant parameters shown in Table 7. The values ​​of each parameter in this embodiment are shown in the 'Embodiment 4' column of Table 7. The specific description of the meaning of each parameter is the same as that in Embodiment 1 above, and will not be repeated here.

[0125] Figures 9 to 11 The performance curves of the optical imaging lenses at their maximum focal length in Examples 3 and 4 are shown, wherein... Figure 9 Astigmatism curves of the optical imaging lenses of Embodiments 3 and 4 are shown, representing meridional image plane curvature and sagittal image plane curvature; Figure 10 The distortion curves of the optical imaging lenses of Embodiments 3 and 4 are shown, which represent the distortion magnitude values ​​corresponding to different image heights; Figure 11 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 3 and 4 are shown, representing the deviation of light of different wavelengths from the converging focal point after passing through the lens. 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.

[0126] Example 5

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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 concave 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 convex. 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.

[0131] 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.

[0132] Table 5 shows the basic parameters of the optical imaging lens of Example 5, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0133]

[0134]

[0135] Table 5

[0136] 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 5 can be changed. For example, the value 0.3744 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 stop STO, and / or the value 0.0409 in row STO corresponding to the 'Thickness / Distance' column, representing the distance on the optical axis between the aperture stop 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 5.96mm to 6.80mm.

[0137] 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 6-1 and 6-2 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 .

[0138] Face number A4 A6 A8 A10 A12 A14 A16 S1 8.9347E-02 -4.5731E-05 -3.2973E-03 -1.4624E-03 -5.6806E-04 -2.0375E-04 -6.5677E-05 S2 1.9204E-02 -9.7666E-03 -5.8222E-04 3.0330E-04 2.6868E-04 1.3689E-04 2.7164E-04 S3 -2.1059E-02 9.6234E-03 1.0977E-03 1.7136E-03 4.3957E-04 3.0380E-04 2.3478E-04 S4 7.4628E-02 7.7427E-04 -9.8044E-03 9.9724E-03 -5.3211E-03 2.9406E-03 -1.1403E-03 S5 2.5776E-01 -1.9740E-02 -2.6327E-03 6.8845E-03 -2.6152E-03 1.0384E-03 -1.1151E-04 S6 -3.7058E-03 1.6780E-03 2.2170E-03 8.9412E-04 2.5354E-04 6.6354E-05 1.2356E-05 S7 1.7059E-01 -1.0202E-02 2.5311E-03 7.9150E-05 -1.9078E-04 9.4452E-05 -4.3294E-05 S8 3.6412E-01 -3.0163E-02 8.1246E-03 -4.7181E-04 -2.5939E-05 5.0336E-05 -1.8045E-05 S9 -2.1192E-01 -1.5765E-02 -2.9712E-03 -7.5784E-04 -1.0513E-03 -3.3426E-04 -6.1314E-05 S10 -4.5517E-01 3.0685E-02 -1.7000E-02 -2.1850E-03 -2.7072E-03 1.3883E-03 -2.6396E-05 S11 -6.9870E-01 2.7039E-01 -5.0459E-02 -2.2609E-03 -5.6622E-03 4.3467E-03 1.0669E-03 S12 -1.5385E+00 1.4603E-01 -3.8467E-02 2.3048E-02 -3.9103E-03 -1.3311E-03 -2.2506E-03

[0139] Table 6-1

[0140] Face number A18 A20 A22 A24 A26 A28 A30 S1 4.0440E-05 3.9721E-05 1.9094E-05 -2.9088E-06 1.1825E-06 9.2145E-06 -4.6601E-06 S2 1.9984E-05 1.0224E-05 3.0359E-06 1.0213E-05 -1.1076E-06 1.4830E-05 -1.2123E-05 S3 -5.8574E-05 8.8775E-06 5.5394E-06 5.5314E-06 4.9190E-06 4.2040E-06 -9.8316E-06 S4 2.9390E-04 -2.8983E-04 1.7463E-04 -3.0472E-05 -7.6679E-07 1.0740E-04 -4.3467E-05 S5 -1.3127E-04 1.1753E-04 -4.6970E-05 8.5909E-05 -8.4658E-05 -3.2485E-06 3.7270E-05 S6 5.3352E-06 -9.2923E-07 5.2700E-06 5.4716E-06 -7.6647E-06 1.5233E-06 0.0000E+00 S7 2.8898E-05 -1.3725E-05 -1.1655E-05 6.6657E-07 1.5785E-05 -6.5444E-06 0.0000E+00 S8 3.3735E-05 9.8783E-07 -2.5389E-05 -1.3925E-05 8.1235E-06 0.0000E+00 0.0000E+00 S9 8.1261E-05 5.4089E-05 1.3119E-05 4.8693E-06 1.3399E-05 -9.1342E-07 0.0000E+00 S10 -8.1750E-05 -5.3693E-05 1.4388E-04 3.0705E-05 0.0000E+00 0.0000E+00 0.0000E+00 S11 -8.4366E-04 -8.1057E-04 5.3214E-04 1.4965E-04 -1.7243E-04 -1.8129E-04 0.0000E+00 S12 -2.5909E-04 -6.4989E-04 -4.1443E-04 -4.0559E-04 -1.6067E-04 -8.1080E-05 0.0000E+00

[0141] Table 6-2

[0142] Referring to Table 7, the values ​​of each relevant parameter in this embodiment are shown in the 'Example 5' column of Table 7. The specific description of the meaning of each parameter is the same as that in Example 1 above, and will not be repeated here.

[0143] Example 6

[0144] The following is for reference Figure 13 The optical imaging lens according to Embodiment 6 of this application is described. Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown.

[0145] In this embodiment, similar to Embodiment 5, 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.

[0146] In this embodiment, similar to Embodiment 5, the optical imaging lens also 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.

[0147] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 5, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 6-1 and 6-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.96mm to 6.80mm.

[0148] The difference between this embodiment and Embodiment 5 lies in the different values ​​of the relevant parameters shown in Table 7. The values ​​of each parameter in this embodiment are shown in the 'Embodiment 6' column of Table 7. The specific descriptions of the meanings represented by each parameter are the same as those in Embodiment 1 above, and will not be repeated here.

[0149] Figures 14 to 16 The performance curves of the optical imaging lenses at their maximum focal length in Examples 5 and 6 are shown, wherein... Figure 14 The astigmatism curves of the optical imaging lenses of Embodiments 5 and 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 15 The distortion curves of the optical imaging lenses of Embodiments 5 and 6 are shown, which represent the distortion magnitude values ​​corresponding to different image heights; Figure 16 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 5 and 6 are shown, representing the deviation of light of different wavelengths from the converging focal point after passing through the lens. According to... Figures 14 to 16 It can be seen that the optical imaging lenses given in Embodiments 5 and 6 can achieve good imaging quality.

[0150] Example / Parameters D5m d5m CP5 EP12 D4m d4m D1m d1m d2m SAG31 La Lb CP2 CP1 Example 1 4.978 4.415 0.392 0.515 4.894 2.600 4.470 3.060 2.820 -0.115 2.610 2.742 0.022 0.018 Example 2 5.134 3.335 0.018 0.511 4.894 2.605 4.490 3.044 2.800 -0.115 2.606 2.776 0.018 0.018 Example 3 5.097 3.322 0.018 0.585 4.857 2.563 4.470 2.972 2.600 -0.095 2.690 2.494 0.022 0.022 Example 4 5.097 3.311 0.022 0.589 4.021 2.543 4.490 3.008 2.580 -0.095 2.688 2.494 0.022 0.018 Example 5 5.097 3.380 0.018 0.595 4.857 2.563 4.455 2.984 2.592 -0.107 2.694 2.494 0.022 0.022 Example 6 5.097 3.342 0.018 0.546 4.025 2.527 4.464 2.976 2.599 -0.107 2.684 2.494 0.022 0.022

[0151] Table 7

[0152] Furthermore, in Examples 1 to 6, the numerical range (minimum to maximum) of the effective focal length f of the optical imaging lens, the effective focal lengths f1 to f6 of the first to sixth lenses, and the combined focal lengths f123 of the first, second, and third lenses are shown in Table 8 below.

[0153]

[0154]

[0155] Table 8

[0156] Examples 1 to 6 respectively satisfy the conditions shown in Table 9 below.

[0157] Conditional / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 f / f4+f / f5 -0.89～-0.77 -0.89～-0.77 -0.91～-0.80 -0.91～-0.80 -0.94～-0.82 -0.94～-0.82 |f5| / (D5m-d5m) 17.09 5.34 8.56 8.51 8.54 8.35 CT5 / CP5×N5 1.50 32.67 30.83 25.22 32.05 32.05 R3 / R4 -0.55 -0.55 -3.17 -3.17 -3.02 -3.02 EP12 / CT2 2.24 2.22 2.54 2.56 2.62 2.40 <![CDATA[(D4m 2 -d4m 2 )×πmm 2 ]]> 54.01 53.94 53.47 30.49 53.47 30.84 R2 / (D1m-d1m) -12.52 -12.21 -11.28 -11.40 -13.42 -13.27 d2m / |SAG31| 24.46 24.28 27.41 27.20 24.22 24.28 Lb / La×(V4+V5+V6) / (V1+V2+V3) 1.40 1.42 1.27 1.27 1.27 1.27 (CT3+CT4+CT5) / Lb 0.41 0.41 0.51 0.51 0.51 0.51 CP2 / CP1×T23 / T12 5.88 4.81 2.73 3.34 3.11 3.11

[0158] Table 9

[0159] This application also provides an imaging device equipped 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) device. The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0160] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical image-taking lens, characterized in that, Comprising: A plurality of light-transmitting elements and at least one non-light-transmitting 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 in sequence from the object side to the image side along the optical axis; The fourth lens has a negative optical power, and its object side surface is concave; The fifth lens has a negative optical power, and its image side surface is concave; The at least one non-light-transmitting element includes: a fifth positioning ring, located on the image side of the fifth lens, and its object side surface is at least partially in contact with the fifth lens; The number of lenses with optical power in the optical imaging lens is six; and The optical imaging lens satisfies: -0.96 < f / f4 + f / f5 ≤ -0.7 and 5.3 < |f5| / (D5m - d5m) < 17.1, where f is the effective focal length of the optical imaging lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, D5m is the outer diameter of the image side surface of the fifth positioning ring, and d5m is the inner diameter of the image side surface of the fifth positioning ring.

2. The optical imaging lens according to claim 1, characterized in that, The central thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP5 of the fifth positioning ring, and the refractive index N5 of the fifth lens satisfy: 1.48 < CT5 / CP5 × N5 < 32.

7.

3. The optical imaging lens according to claim 1, characterized in that, The at least one non-light-transmitting element further includes: a first positioning ring, located on the image side of the first lens, and its object side surface is at least partially in contact with the first lens; a second positioning ring, located on the image side of the second lens, and its object side surface is at least partially in contact with the second lens; The radius of curvature R3 of the object side surface of the second lens and the radius of curvature R4 of the image side surface of the second lens satisfy: -3.2 < R3 / R4 < -0.53; The distance EP12 between the first positioning ring and the second positioning ring on the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 2.2 < EP12 / CT2 < 2.

65.

4. The optical imaging lens according to claim 1, characterized in that, The at least one non-light-transmitting element further includes: a fourth positioning ring, located on the image side of the fourth lens, and its object side surface is at least partially in contact with the fourth lens; The surface reflectivity of the fourth positioning ring in the visible light range is less than or equal to 3%; 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: 30.45mm 2 <(D4m 2 -d4m 2 )×π<54.05mm 2 。 5. The optical imaging lens according to claim 1, characterized in that, The at least one non-light-transmitting element further includes: a first positioning ring, located on the image side of the first lens, and its object side surface is at least partially in contact with the first lens; The radius of curvature R2 of the image side surface of the first lens, 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: -13.45 < R2 / (D1m - d1m) < -11.

25.

6. The optical imaging lens according to any one of claims 1 to 5, characterized in that, The at least one non-light-transmitting element further includes: a second positioning ring, located on the image side of the second lens, and its object side surface is at least partially in contact with the second lens; The inner diameter d2m of the image side surface of the second positioning ring and the axial distance SAG31 from the intersection point of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens satisfy: 24.2 <d2m / |SAG31|<27.45。 7. The optical imaging lens according to any one of claims 1 to 5, 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 in at least partial contact with the first lens; and a second positioning ring located on the image side of the second lens, with its object side in at least partial contact with the second lens. The maximum thickness CP2 of the second positioning ring, the maximum thickness CP1 of the first positioning ring, the air gap T23 between the second lens and the third lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 2.7 <CP2 / CP1×T23 / T12<5.9。 8. The optical imaging lens according to any one of claims 1 to 5, 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.

9. The optical imaging lens according to claim 8, characterized in that, The maximum height Lb of the second lens barrel, the maximum height La of the first lens barrel, the dispersion coefficient V4 of the fourth lens, the dispersion coefficient V5 of the fifth lens, the dispersion coefficient V6 of the sixth lens, the dispersion coefficient V1 of the first lens, the dispersion coefficient V2 of the second lens, and the dispersion coefficient V3 of the third lens satisfy the following: 1.25 <Lb / La×(V4+V5+V6) / (V1+V2+V3)<1.45。 10. The optical imaging lens according to claim 8, 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 with the maximum height Lb of the second lens barrel: 0.4 < (CT3 + CT4 + CT5) / Lb < 0.

55.

11. The optical imaging lens according to any one of claims 1 to 5, characterized in that, The first lens has positive optical power, and its object side is convex, and its image side is convex. The second lens has negative optical power, and its object side is concave, as is its image side; The third lens has positive optical power, with its object side being concave and its image side being convex. The sixth lens has negative optical power, and its object side and image side are both concave.

Images