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 first lens has a positive optical power, and both its object side and image side 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 a negative optical power; at least one non-light-transmitting element includes a second positioning ring located on the image side of the second lens and at least partially contacting the second lens. The effective focal length f1 of the first lens and the radius of curvature 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 radius of curvature R4 of the image side surface of the second lens satisfy -1.95 < f2 / R4 ≤ -1.1, the outer diameter D2s and the inner diameter d2s of the object side surface of the second positioning ring, the central thickness CT2 of the second lens, and the spacing distance T12 between the first and second lenses on the optical axis satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23.

Description

Technical Field

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

[0002] With the rapid development of the mobile phone industry, consumers' requirements for the mobile phone camera function are getting higher and higher. Among them, in the past two years, more attention has been paid to the shooting effect of the telephoto lens. The telephoto lens has a longer focal length, can capture distant scenes, create a sense of space and depth, can compress the depth of field, and blur the background in portrait shooting to highlight the main subject, which is deeply loved by consumers. With the development of the telephoto lens, consumers' requirements for the shooting effect of the telephoto lens are getting higher and higher, and the combination of telephoto and macro effects has gradually become the mainstream demand. However, the yield rate of the telephoto lens with macro function is relatively low, and the cost and delivery schedule have become the common pressures faced by current lens manufacturers, which need to be solved urgently. 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; the first lens has a positive optical power, its object side is convex, and its image side is convex; the object side of the second lens is convex, and its image side is concave; the sixth lens has a negative optical power; at least one non-light-transmitting element may 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 optical imaging lens may 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 of the first lens, f2 is the effective focal length of the second lens, R4 is the curvature radius 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 central 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.

[0004] In one embodiment, the optical imaging lens may further include a first lens barrel and a second lens barrel arranged in sequence 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 zoom of the optical imaging lens is achieved by changing the distance between the third lens and the fourth lens on the optical axis.

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

[0006] 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 along the optical axis direction may satisfy: 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57.

[0007] In one embodiment, the maximum height La of the first lens barrel along the optical axis direction, the maximum height Lb of the second lens barrel along the optical axis direction, the minimum effective focal length fmin of the optical imaging lens, and the combined focal length f123 of the first, second, and third lenses may satisfy: La / Lb × fmin / f123 < 2.

[0008] In one embodiment, the maximum height La of the first lens barrel along the optical axis direction, the maximum height Lb of the second lens barrel along the optical axis direction, the minimum effective focal length fmin of the optical imaging lens, and the combined focal length f123 of the first, second, and third lenses may satisfy: 1.35 < La / Lb × fmin / f123 < 1.53.

[0009] In one embodiment, 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 may satisfy: 0.88 < fmin / D0m < 1.05.

[0010] In one embodiment, 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 may satisfy: -37.28 mm < f2 × (D2m + d2m) / (D2m - d2m) < -20.78 mm.

[0011] In one embodiment, at least one non-transmissive element may further include a first positioning ring located on the image side of the first lens and having its object side surface at least partially in contact with the first lens; the central 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 may satisfy: 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / drm < 1.56.

[0012] In one embodiment, at least one non-translucent element may further include a fourth positioning ring located on the image side of the fourth lens and having its object side surface 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 and the inner diameter d4s of the object side surface of the fourth positioning ring may satisfy: 0.53 < f4 / f5 < 0.72 and 1.52 < D4s / d4s < 1.94.

[0013] In one embodiment, the at least one non-translucent element may further include a fourth positioning ring located on the image side of the fourth lens and having its object side surface 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 and the inner diameter d4m of the image side surface of the fourth positioning ring may satisfy: 1.55 < N5 / N4 × D4m / d4m < 2.

[0014] The optical imaging lens according to an embodiment of the present application includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence along the optical axis from the object side to the image side. Among them, the first lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the object side surface of the second lens is convex, and its image side surface is concave; the sixth lens has a negative optical power; the optical imaging lens further includes a second positioning ring located on the image side of the second lens and having its object side surface 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 surface 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 surface of the second lens satisfy -1.95 < f2 / R4 ≤ -1.1, 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 spacing distance T12 between the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23. Through this setting of the lens, while the first and second lenses meet the design requirements, the sensitivity problem of the second positioning ring in the case of the cooperation of the first and second lenses can be solved, the sensitivity of the second positioning ring can be reasonably reduced, and the lens yield can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In combination with 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:

[0016] Figure 1 The structure and partial parameter dimensions of an optical imaging lens according to an exemplary embodiment of the present application are shown;

[0017] Figure 2 The structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0018] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0019] Figure 4 , Figure 5 and Figure 6 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 1 and 2 of this application are shown respectively.

[0020] Figure 7 A schematic diagram of the structure of the optical imaging lens according to Embodiment 3 of this application is shown;

[0021] Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0022] Figure 9 , Figure 10 and Figure 11 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 3 and 4 of this application are shown respectively.

[0023] Figure 12 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0024] Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0025] Figure 14 , Figure 15 and Figure 16 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lenses according to Embodiments 5 and 6 of this application are shown respectively; and

[0026] Figure 17 A schematic diagram of the structure of an optical imaging lens according to another exemplary embodiment of this application is shown. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0033] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

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

[0035] The optical imaging lens according to an exemplary embodiment of the present 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.

[0036] In an exemplary embodiment, the first lens may have a positive optical power.

[0037] In an exemplary embodiment, the first lens and the second lens may have opposite positive and negative optical power attributes.

[0038] In an exemplary embodiment, the sixth lens may have a negative optical power.

[0039] In an exemplary embodiment, the object side surface of the first lens may be convex, and the image side surface may be convex.

[0040] In an exemplary embodiment, the object side surface of the second lens may be convex, and the image side surface may be concave.

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

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

[0043] In an exemplary embodiment, the optical imaging lens can be zoomed by changing the on-axis spacing between at least some of the lenses from the first lens to the sixth lens. For example, the optical imaging lens can be zoomed by changing the spacing between the third lens and the fourth lens on the optical axis.

[0044] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -1.95 < f2 / R4 ≤ -1.1, where f2 is the effective focal length of the second lens, and R4 is the radius of curvature of the image side surface of the second lens.

[0045] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 5.70 < D2s / d2s × 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 central 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.

[0046] The optical imaging lens according to an exemplary embodiment of the present application 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 first lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the object side surface of the second lens is convex, and its image side surface is concave; the sixth lens has a negative optical power; the optical imaging lens further includes a second positioning ring located on the image side of the second lens and at least partially contacting the object side surface of the second lens; and, the effective focal length f1 of the first lens and the radius of curvature 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 radius of curvature R4 of the image side surface of the second lens satisfy -1.95 < f2 / R4 ≤ -1.1, 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 distance T12 between the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23. By such a setting of the lens, while the first and second lenses meet the design requirements, the sensitivity problem of the second positioning ring in the case of the cooperation of the first and second lenses can be solved, the sensitivity of the second positioning ring can be reasonably reduced, and the lens yield can be improved.

[0047] Referring to Table 1, three exemplary embodiments, i.e., Example 1, Example 2, and Example 3, are shown in Table 1. Among them, Example 1 and Example 2 are two embodiments before improvement, and Example 3 is an embodiment after improvement. The lenses of the three exemplary embodiments have similar structural settings: including the first to sixth lenses arranged in sequence from the object side to the image side along the optical axis. The first lens has a positive optical power, the sixth lens has a negative optical 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 that is at least partially in contact with the second lens. In Example 1, the optical imaging lens satisfies the conditional expressions f1 / R2 = -0.14, f2 / R4 = -1.3, and D2s / d2s × CT2 / T12 = 12.3. For the lens according to this embodiment, the MTF (Modulation Transfer Function) value corresponding to the central field of view is less than 0.82. In Example 2, the optical imaging lens satisfies the conditional expressions f1 / R2 = -0.12, f2 / R4 = -1.3, and D2s / d2s × CT2 / T12 = 4.5. For the lens according to this embodiment, the MTF value corresponding to the central field of view is less than 0.81. In Example 3, the optical imaging lens satisfies the conditional expressions f1 / R2 = -0.09, f2 / R4 = -1.1, and D2s / d2s × CT2 / T12 = 7.5. For the lens according to this embodiment, the MTF curve 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 curvature radius R2 of the image side surface of the first lens is within the range 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 curvature radius R4 of the image side surface of the second lens is within the range greater than -1.95 and less than or equal to -1.1, by reasonably controlling the value of the conditional expression D2s / d2s × CT2 / T12 within the range greater than 5.70 and less than 8.23, the MTF curve of the lens is better, and the yield rate of the lens is higher.

[0048] Therefore, for the optical imaging lens according to the embodiment of the present application, while controlling the effective focal length f1 of the first lens and the curvature radius 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 curvature radius 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 spacing distance T12 between the first lens and the second lens on the optical axis to satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23, it is possible to reduce the sensitivity of the second positioning ring and improve the lens yield rate while the first and second lenses meet the design requirements.

[0049]

[0050] Table 1

[0051] 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.

[0052] 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.

[0053] 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 17 As shown, the first to sixth lenses E1-E6 are all mounted in the lens barrel P0. The first to sixth lenses can be arranged sequentially along the optical axis from the object side to the image side. The optical imaging lens may also include at least one non-transparent element.

[0054] In an exemplary embodiment, each pair of adjacent lenses in the first to sixth lenses may have an air gap. The number of lenses with optical power in the optical imaging lens is, for example, six.

[0055] In an exemplary 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.

[0056] In an exemplary 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.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.35 < La / TTL < 0.4, where La is the maximum height of the first lens barrel along the optical axis direction, and TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical imaging lens. By controlling the conditional formula 0.35 < La / TTL < 0.4, the height of the first lens barrel can be controlled, avoiding the risk that the lens in the second lens barrel bulges outwards due to the excessive height of the first lens barrel, and further causing damage to the appearance of the lens.

[0058] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57, where CT3 is the central thickness of the third lens on the optical axis, CT4 is the central thickness of the fourth lens on the optical axis, CT5 is the central thickness of the fifth lens on the optical axis, and Lb is the maximum height of the second lens barrel along the optical axis direction. By controlling the conditional formula 0.45 < (CT3 + CT4 + CT5) / Lb < 0.57, the height of the second lens barrel can be controlled, avoiding interference between the first lens barrel and the second lens barrel during operation, and further avoiding the situation of unable to image.

[0059] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula La / Lb × fmin / f123 < 2, where La is the maximum height of the first lens barrel along the optical axis direction, Lb is the maximum height of the second lens barrel along the optical axis direction, fmin is the minimum effective focal length of the optical imaging lens, and f123 is the combined focal length of the first lens, the second lens, and the third lens. By controlling the conditional formula La / Lb × fmin / f123 < 2, it is more beneficial to control the total length of the lens, can reasonably control the air gap between the lenses, and is beneficial to avoiding the problem that the large vertical deviation of the lens is caused by excessive light deflection, and further affecting the yield due to unstable assembly. More specifically, La, Lb, fmin, and f123 can satisfy: 1.35 < La / Lb × fmin / f123 < 1.53.

[0060] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0.88 < fmin / D0m < 1.05, where fmin is the minimum effective focal length of the optical imaging 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 of the second lens barrel closest to the image side and perpendicular or approximately perpendicular to the optical axis). By controlling the conditional formula 0.88 < fmin / D0m < 1.05, it is more beneficial to control the height of the light exiting the lens to the chip, can control optical parameters such as CRA, and at the same time can control the outer diameter of the lens, avoiding difficulties in module assembly caused by excessive outer diameter.

[0061] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula -37.28 mm < f2×(D2m + d2m) / (D2m - d2m) < -20.78 mm, where f2 is the effective focal length of the second lens, D2m is the outer diameter of the image side of the second positioning ring, and d2m is the inner diameter of the image side of the second positioning ring. By controlling the conditional formula -37.28 mm < f2×(D2m + d2m) / (D2m - d2m) < -20.78 mm, it is more conducive to reasonably increasing the edge thickness of the second lens, increasing the strength of the second lens, improving the assembly stability between the second lens and the second positioning ring, and improving the problem of low yield caused by the cooperation of the second lens, the second positioning ring and the third lens.

[0062] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formulas 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / d1m < 1.56, where CT1 is the central thickness of the first lens on the optical axis, T12 is the spacing distance between the first lens and the second lens on the optical axis, D1m is the outer diameter of the image side of the first positioning ring, and d1m is the inner diameter of the image side of the first positioning ring. By controlling the conditional formulas 17.95 < CT1 / T12 < 20.3 and 1.2 < D1m / d1m < 1.56, it is beneficial to improve the molding feasibility of the first lens and the second lens. At the same time, the assembly cooperation between the first lens, the first positioning 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 positioning ring and the second lens can be improved.

[0063] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formulas 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 of the fourth positioning ring, and d4s is the inner diameter of the object side of the fourth positioning ring. By reasonably controlling the ratio of the effective distances of the fourth lens and the fifth lens, the light converged by the fourth lens can be made to diverge through the fifth lens. At the same time, by reasonably controlling the ratio of the outer diameter and the inner diameter of the fourth positioning ring, optical main parameters such as relative illumination can be controlled to obtain a desired imaging effect.

[0064] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the condition 1.55 < N5 / N4 × D4m / d4m < 2, where 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 of the fourth positioning ring, and d4m is the inner diameter of the image side of the fourth positioning ring. By controlling the condition 1.55 < N5 / N4 × D4m / d4m < 2, it is more conducive to controlling the gap between the fourth lens and the fifth lens, helping to control the field curvature problem caused by the gap, while making the lens thickness and spacing more uniform, effectively reducing the thickness sensitivity of the lens, and correcting the field curvature.

[0065] In an exemplary embodiment, the first lens may have a positive optical power, its object side may be convex, and its image side may be convex.

[0066] In an exemplary embodiment, the second lens may have a negative optical power, its object side may be convex, and its image side may be concave.

[0067] In an exemplary embodiment, the third lens may have a positive optical power, its object side may be concave, and its image side may be convex.

[0068] In an exemplary embodiment, the fourth lens may have a negative optical power, its object side may be concave, and its image side may be concave.

[0069] In an exemplary embodiment, the fifth lens may have a negative optical power, its object side may be convex or concave, and its image side may be concave.

[0070] In an exemplary embodiment, the sixth lens may have a negative optical power, its object side may be convex or concave, and its image side may be concave.

[0071] In an exemplary embodiment, the optical imaging lens of the present application may include a trimmed lens. The outer peripheral surface of the trimmed lens may have a trimmed portion and an untrimmed portion, and the outer diameter of the trimmed portion of the lens may be smaller than the outer diameter of the untrimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter / maximum outer diameter of the lens generally refers to the outer diameter / maximum outer diameter of the untrimmed portion of the lens.

[0072] In an exemplary embodiment, the non-light-transmitting element group may include a trimmed positioning ring. The outer peripheral surface of the trimmed positioning ring may have a trimmed portion and an untrimmed portion, and the outer diameter of the trimmed portion of the positioning ring may be smaller than the outer diameter of the untrimmed portion of the positioning ring. When the outer peripheral surface of the positioning ring has a trimmed portion, the outer diameter / maximum outer diameter of the positioning ring generally refers to the outer diameter / maximum outer diameter of the untrimmed portion of the positioning ring.

[0073] In an exemplary embodiment, the optical imaging lens of the present 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 set at an appropriate position of the optical imaging lens. For example, the aperture stop can be set between the third lens and the fourth lens.

[0074] In an exemplary embodiment, optionally, the above-mentioned 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.

[0075] In an exemplary embodiment, among the respective surfaces of the first lens to the sixth lens, there may be included aspherical mirrors. 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 as much aberration as possible during imaging, thereby improving the imaging quality.

[0076] According to the six-piece telephoto optical imaging lens provided by the exemplary embodiment of the present application, by reducing the sensitivity of black objects (non-transmissive elements), the yield can be effectively improved.

[0077] On the one hand, the optical imaging lens according to an embodiment of the present application includes 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 first lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the object side surface of the second lens is convex, and its image side surface is concave; the sixth lens has a negative optical power; the optical imaging lens further includes a second positioning ring located on the image side of the second lens and at least partially contacting the object side surface of 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 f​2 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, 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 spacing distance T12 of the first lens and the second lens on the optical axis satisfy 5.70 < D2s / d2s × CT2 / T12 < 8.23. Through this setting of the lens, while the first and second lenses meet the design requirements, the sensitivity problem of the second positioning ring in the case of the cooperation of the first and second lenses can be solved, the sensitivity of the second positioning ring can be reasonably reduced, and the lens yield can be improved.

[0078] On the other hand, the optical imaging lens according to an embodiment of the present application includes 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 first lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the object side surface of the second lens is convex, and its image side surface is concave; the sixth lens has a negative optical power; the optical imaging lens further includes 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 further includes a first lens barrel and a second lens barrel arranged in sequence from the object side to the image side along the optical axis. The first to third lenses are assembled in the first lens barrel, and the fourth to sixth lenses are assembled in the second lens barrel; and, the maximum height La of the first lens barrel in the optical axis direction, the maximum height Lb of the second lens barrel in the optical axis direction, 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 conditional formula La / Lb×fmin / f123 < 2. By setting the lens in this way, it is more conducive to controlling the total length of the lens, can reasonably control the air gap between the lenses, and is beneficial to avoiding the problem that the light deflection is too large, resulting in a large vertical axial difference between the lenses, and further leading to unstable assembly and affecting the yield.

[0079] On the other hand, the optical imaging lens according to an embodiment of the present application includes 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 first lens has a positive optical power, its object side surface is convex, and its image side surface is convex; the object side surface of the second lens is convex, and its image side surface is concave; the sixth lens has a negative optical power; the optical imaging lens further includes 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 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 conditional formula -37.28 mm < f2×(D2m + d2m) / (D2m - d2m) < -XX.78 mm. By setting the lens in this way, it is more conducive to increasing the edge thickness of the second lens, increasing the strength of the second lens, improving the assembly stability of the second lens and the second positioning ring, and improving the problem of low yield caused by the cooperation of the second lens, the second positioning ring, and the third lens.

[0080] It should be noted that in the translation of item , there is an unclear "XX" in the original text. I have translated it as "XX" according to the original text. If there is a specific value, please replace it for a more accurate translation.In another aspect, an optical imaging lens according to an embodiment of the present application includes 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 first lens has a positive optical power, its object side is convex, and its image side is convex; the object side of the second lens is convex, and its image side is concave; the sixth lens has a negative optical power; the optical imaging lens further includes a second positioning ring located on the image side of the second lens and at least partially contacting the object side of the second lens, and a fourth positioning ring located on the image side of the fourth lens and at least partially contacting the object side of 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 of the fourth positioning ring, and the inner diameter d4m of the image side of the fourth positioning ring satisfy the conditional formula 1.55 < N5 / N4 × D4m / d4m < 2. Through this setting of the lens, it is more conducive to controlling the gap between the fourth lens and the fifth lens, helping to control the field curvature problem caused by the gap, while making the lens thickness and interval more uniform, effectively reducing the thickness sensitivity of the lens, and correcting the field curvature.

[0081] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens 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 two lens groups with a total of six lenses are described as an example in the embodiment, the optical imaging lens is not limited to including two lens groups and six lenses. 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.

[0082] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiment with reference to the accompanying drawings.

[0083] Example 1

[0084] 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.

[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 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 2 can be changed. For example, the value 0.4869 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 -0.0597 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 5.93mm to 6.80mm.

[0093] 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:

[0094]

[0095] 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 3-1 and 3-2 below give the higher-order coefficients A4, A6, A8, A14, A15, A16, A17, A18, A19 ... 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 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 various related parameters of the first lens barrel P0a, the second lens barrel P0b, and the multiple spacer elements P1, P2, P4, and P5 in this embodiment are shown in the 'Embodiment 1' row of Table 8. The specific descriptions of the various related parameters shown in Table 8 are as follows:

[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, 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.

[0107] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 2, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 3-1 and 3-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.93mm to 6.80mm.

[0108] The difference between this embodiment and Embodiment 1 lies in the different values ​​of at least some of the relevant parameters shown in Table 8. The values ​​of each parameter in this embodiment are shown in the 'Embodiment 2' row of Table 8. 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.

[0109] 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 on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 1 and 2 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the lens; Figure 5 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 6 The distortion curves of the optical imaging lenses of Embodiments 1 and 2 are shown, representing the distortion magnitude values ​​corresponding to different image heights. 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.

[0110] Example 3

[0111] 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.

[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 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.

[0129] 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.

[0130] 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.

[0131] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 4, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 5-1 and 5-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.85mm to 6.80mm.

[0132] The difference between this embodiment and Embodiment 3 lies in the different values ​​of the relevant parameters shown in Table 8. The values ​​of each parameter in this embodiment are shown in the 'Embodiment 4' row of Table 8. 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.

[0133] 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 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 3 and 4 are shown, which represent the deviation of light of different wavelengths from the convergence focal point after passing through the lens; Figure 10 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 11 The distortion curves of the optical imaging lenses of Embodiments 3 and 4 are shown, representing the distortion magnitude 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 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.

[0140] Table 6 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).

[0141]

[0142]

[0143] Table 6

[0144] 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 6 can be changed. For example, the value 0.4662 in the 'Thickness / Distance' column corresponding to row S6, which represents the distance on the optical axis between the image side of the third lens E3 and the aperture stop STO, and / or the value -0.0524 in the 'Thickness / Distance' column corresponding to row STO, which represents 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 5.92mm to 6.80mm.

[0145] 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 7-1 and 7-2 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 .

[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 each relevant parameter in this embodiment are shown in the 'Example 5' 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.

[0152] Example 6

[0153] 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.

[0154] 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.

[0155] 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, with 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, with 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, with 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, with 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, with 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, with its object side at least partially in contact with the fifth spacer positioning ring P5b.

[0156] Furthermore, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 6, and the table of higher-order coefficients of the aspherical mirror is the same as that in Tables 7-1 and 7-2. The optical imaging lens according to this embodiment can also achieve zoom within the range of 5.92mm to 6.80mm.

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

[0158] 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 on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 5 and 6 are shown, which represent the deviation of the convergence focal point of light of different wavelengths after passing through the lens; Figure 15 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 16 The distortion curves of the optical imaging lenses of Embodiments 5 and 6 are shown, representing the distortion magnitude values ​​corresponding to different image heights. 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.

[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] 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 9 below.

[0162] Example / Parameters 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] Examples 1 to 6 respectively satisfy the conditions shown in Table 10 below.

[0165] Conditional / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 D2s / d2s×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×fmin / f123 1.4172 1.4200 1.3876 1.4000 1.5007 1.5002 f2×(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×D4m / d4m 1.7066 1.9619 1.9552 1.7830 1.9675 1.5899

[0166] Table 10

[0167] 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.

[0168] 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, 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