Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a plurality of spacing elements, the lens group and the spacing elements are assembled in the lens barrel, the lens group is composed of seven lenses, and the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from the object side to the image side in the optical axis direction of the optical imaging lens; the optical imaging lens satisfies the following conditions: 18.90 < = (T45 + T67) / T56lt; 22.00, 22.00, 22.00; -20.80 lt,-20.80 lt; f5 / (d5s-d4m) lt; 10 < 0.75 >; 8.35 lt, 8.35 lt; f6 / (d6s-d5m) lt; and 14.35, 14.35. The problem that stray light is increased due to the fact that the interval between adjacent lenses at the rear end of a seven-piece optical imaging lens in the prior art is large is solved.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical imaging lens. Background Technology

[0002] With the continuous development of optical technology, the number of lenses in optical imaging lenses is constantly increasing. Seven-element optical imaging lenses are widely welcomed by major manufacturers and users due to their superior optical performance. However, optimizing the optical performance of seven-element optical imaging lenses presents numerous design challenges.

[0003] Currently, in some seven-element optical imaging lenses, the air gap between adjacent lenses at the rear end is too large. When the air gap is too large, there is a larger space for light to reflect between the lenses, which leads to more stray light at the rear end of the optical imaging lens. In other words, the phenomenon of non-imaging light reaching the imaging surface in the optical imaging lens is aggravated, which seriously affects the imaging quality of the optical imaging lens.

[0004] In other words, existing seven-element optical imaging lenses suffer from increased stray light due to the large spacing between adjacent lenses at the rear end. Summary of the Invention

[0005] The main objective of this invention is to provide an optical imaging lens to solve the problem of increased stray light caused by the large spacing between adjacent lenses at the rear end in the existing seven-element optical imaging lens.

[0006] To achieve the above object, according to one aspect of the present invention, an optical imaging lens is provided, which includes a lens barrel and a lens group and a plurality of spacer elements assembled in the lens barrel. The lens group consists of seven lenses. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis direction of the optical imaging lens. There is an air gap between adjacent two lenses. The fourth lens has a positive optical power, the fifth lens has a negative optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power; the plurality of spacer elements at least include a fourth spacer element, a fifth spacer element, and a sixth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is partially in contact with the image side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is partially in contact with the image side surface of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and is partially in contact with the image side surface of the sixth lens; the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 18.90 ≤ (T45 + T67) / T56 < 22.00; the effective focal length f5 of the fifth lens, the inner diameter d4m of the image side surface of the fourth spacer element, and the inner diameter d5s of the object side surface of the fifth spacer element satisfy: -20.80 < f5 / (d5s - d4m) < -10.75; the effective focal length f6 of the sixth lens, the inner diameter d5m of the image side surface of the fifth spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element satisfy: 8.35 < f6 / (d6s - d5m) < 14.35.

[0007] According to another aspect of the present invention, an optical imaging lens is provided, which includes a lens barrel, a lens group and a plurality of spacer elements assembled in the lens barrel. The lens group consists of seven lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis direction of the optical imaging lens. There is an air gap between adjacent two lenses. The fourth lens has a positive optical power, the fifth lens has a negative optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power; the plurality of spacer elements at least include a fourth spacer element, a fifth spacer element and a sixth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is partially in contact with the image side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is partially in contact with the image side surface of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and is partially in contact with the image side surface of the sixth lens; the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 18.90 ≤ (T45 + T67) / T56 < 22.00; the curvature radius R9 of the object side surface of the fifth lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfy: 0.65 < R9 / (D4m - d4m) < 1.25; the curvature radius R12 of the image side surface of the sixth lens, the inner diameter d6s of the object side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element satisfy: -10.60 < R12 / (D6m - d6s) < -0.90.

[0008] According to another aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel and a lens group and a plurality of spacers mounted within the lens barrel. The lens group consists of seven lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side to the image side along the optical axis of the optical imaging lens, with air gaps between adjacent lenses. The fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power. The plurality of spacers includes at least a fourth spacer, a fifth spacer, and a sixth spacer, with the fourth spacer located between the fourth and fifth lenses and between the fourth lens and the image of the fifth lens. The fifth spacer element is located between the fifth and sixth lenses and in contact with the image-side side of the fifth lens. The sixth spacer element is located between the sixth and seventh lenses and in contact with the image-side side of the sixth lens. The air gaps T45 between the fourth and fifth lenses on the optical axis, T56 between the fifth and sixth lenses on the optical axis, and T67 between the sixth and seventh lenses on the optical axis satisfy the following: 18.90 ≤ (T45 + T67) / T56 < 22.00. The combined focal length f56 of the fifth and sixth lenses, the inner diameter d4m of the image-side side of the fourth spacer element, and the inner diameter d6s of the object-side side of the sixth spacer element satisfy the following: 9.75 <f56 / (d6s-d4m)<26.30。

[0009] Furthermore, the radius of curvature R9 of the object-side surface of the fifth lens, the outer diameter D4m of the image-side surface of the fourth spacer element, and the inner diameter d4m of the image-side surface of the fourth spacer element satisfy the following relationship: 0.65 <R9 / (D4m-d4m)<1.25。

[0010] Furthermore, the radius of curvature R12 of the image-side surface of the sixth lens, the inner diameter d6s of the object-side surface of the sixth spacer element, and the outer diameter D6m of the image-side surface of the sixth spacer element satisfy the following relationship: -10.60 <R12 / (D6m-d6s)<-0.90。

[0011] Furthermore, the distance EP45 between the image-side surface of the fourth spacer element and the object-side surface of the fifth spacer element along the optical axis, and the air gap T45 between the fourth and fifth lenses along the optical axis, satisfy: 1.40 <EP45 / T45<2.15。

[0012] Furthermore, the inner diameter d6m of the image-side surface of the sixth spacer element and the maximum effective radius DT71 of the object-side surface of the seventh lens satisfy the following relationship: 1.65 <d6m / DT71≤1.95。

[0013] Furthermore, the maximum thickness CP6 of the sixth spacer element along the optical axis and the center thickness CT7 of the seventh lens along the optical axis satisfy the following condition: 0.00 <CP6 / CT7<0.10。

[0014] Furthermore, the radius of curvature R11 of the object side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, and the outer diameter D5s of the object side of the fifth spacer element satisfy the following: -5.35 < (R11 + R12) / D5s < -0.05.

[0015] Furthermore, the spacing EP56 between the image-side surface of the fifth spacer element and the object-side surface of the sixth spacer element along the optical axis, the center thickness CT6 of the sixth lens along the optical axis, and the refractive index N6 of the sixth lens satisfy the following condition: 0.35 <EP56 / (CT6×N6)≤0.55。

[0016] Furthermore, the combined focal length f56 of the fifth and sixth lenses, the distance EP45 between the image-side surface of the fourth spacer and the object-side surface of the fifth spacer in the optical axis direction, and the distance EP56 between the image-side surface of the fifth spacer and the object-side surface of the sixth spacer in the optical axis direction satisfy the following condition: 6.05 <f56 / (EP45+EP56)<12.50。

[0017] Furthermore, the outer diameter D0m of the image-side end face of the lens tube and the outer diameter D6s of the object-side end face of the sixth spacer element satisfy the following relationship: 1.05 <D0m / D6s<1.65。

[0018] Furthermore, the inner diameter d0m of the image-side end face of the lens barrel and the radius of curvature R14 of the image-side surface of the seventh lens satisfy the following relationship: 2.85 <d0m / R14<4.20。

[0019] Furthermore, the effective focal length f7 of the seventh lens and the inner diameter d6m of the image-side surface of the sixth spacer element satisfy the following condition: -2.30 <f7 / d6m<-1.75。

[0020] Furthermore, the plurality of spacers also includes a seventh spacer, which is located on the image side of the seventh lens and partially contacts the image side surface of the seventh lens. The maximum thickness CP6 of the sixth spacer in the optical axis direction, the spacing EP67 between the image side surface of the sixth spacer and the object side surface of the seventh spacer in the optical axis direction, the air gap T67 between the sixth and seventh lenses in the optical axis, and the center thickness CT7 of the seventh lens in the optical axis satisfy the following: 0.50 < (CP6 + EP67) / (T67 + CT7) < 0.75.

[0021] Furthermore, the plurality of spacer elements further includes a seventh spacer element, which is located on the image side of the seventh lens and is in partial contact with the image-side surface of the seventh lens. The distance L between the object-side end face and the image-side end face of the lens barrel in the optical axis direction, and the spacer distance EP47 between the image-side surface of the fourth spacer element and the object-side surface of the seventh spacer element in the optical axis direction satisfy: 3.10 < L / EP47 < 3.60.

[0022] Applying the technical solution of the present invention, the optical imaging lens includes a lens barrel and a lens group and a plurality of spacer elements assembled in the lens barrel. The lens group consists of seven lenses. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis direction of the optical imaging lens. There is an air gap between adjacent two lenses. The fourth lens has a positive optical power, the fifth lens has a negative optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power; the plurality of spacer elements at least include a fourth spacer element, a fifth spacer element, and a sixth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image-side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image-side surface of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and is in partial contact with the image-side surface of the sixth lens; the air gaps T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 18.90 ≤ (T45 + T67) / T56 < 22.00; the effective focal length f5 of the fifth lens, the inner diameter d4m of the image-side surface of the fourth spacer element, and the inner diameter d5s of the object-side surface of the fifth spacer element satisfy: -20.80 < f5 / (d5s - d4m) < -10.75; the effective focal length f6 of the sixth lens, the inner diameter d5m of the image-side surface of the fifth spacer element, and the inner diameter d6s of the object-side surface of the sixth spacer element satisfy: 8.35 < f6 / (d6s - d5m) < 14.35.

[0023] The optical imaging lens of this application consists of a lens barrel, seven lenses, and at least three spacer elements. It satisfies the following conditions: the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, the seventh lens has negative optical power, and 18.90≤(T45+T67) / T56<22.00. By controlling the distribution of optical power of the rear lenses and maintaining a relatively small air gap between the fifth and sixth lenses on the optical axis, while maintaining a relatively large air gap between the fourth and fifth lenses and between the sixth and seventh lenses on the optical axis, it allows the fourth and fifth lenses, and the sixth and seventh lenses, to distribute light with lower optical power, reducing astigmatism at the edges of the field of view. Furthermore, the combination of opposite positive and negative optical powers of adjacent lenses can better correct axial chromatic aberration and optimize spherical aberration. However, this can easily lead to a large reflection space between the fourth and fifth lenses and between the sixth and seventh lenses, resulting in stray light easily generated at the rear of the optical imaging lens. This exacerbates the phenomenon of non-imaging light reaching the imaging plane, severely affecting the imaging quality of the optical imaging lens. Based on this, by controlling the ratios of f5 / (d5s-d4m) and f6 / (d6s-d5m), this application can ensure that f5 and f6 are within a reasonable range, thus constraining the degree of light deflection in the fifth and sixth lenses. Simultaneously, by constraining the inner diameters of the fourth, fifth, and sixth spacers, the height of the light rays propagating in the fifth and sixth lenses can be controlled. This ensures that the imaging light rays pass smoothly through the fourth, fifth, and sixth spacers while effectively blocking the penetration of non-imaging light rays. This effectively reduces stray light generated by reflections of non-imaging light rays at the edge of the effective diameter of the object-side surface of the fifth lens and the image-side surface of the sixth lens, thereby ensuring the imaging quality of the optical imaging lens. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A dimensioned diagram of an optical imaging lens according to an alternative embodiment of the present invention is shown;

[0026] Figure 2 A partial structural schematic diagram of the optical imaging lens of Embodiment 1-1 of the present invention is shown;

[0027] Figure 3 A partial structural schematic diagram of the optical imaging lens of Embodiments 1-2 of the present invention is shown;

[0028] Figure 4The diagram shows partial structural schematics of the optical imaging lenses of embodiments 1-3 of the present invention;

[0029] Figures 5 to 7 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 1 of the present invention are shown respectively.

[0030] Figure 8 A partial structural schematic diagram of the optical imaging lens of Embodiment 2-1 of the present invention is shown;

[0031] Figure 9 A partial structural schematic diagram of the optical imaging lens of Embodiment 2-2 of the present invention is shown;

[0032] Figure 10 A partial structural schematic diagram of the optical imaging lens of Embodiments 2-3 of the present invention is shown;

[0033] Figures 11 to 13 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 2 of the present invention are shown respectively.

[0034] Figure 14 A partial structural schematic diagram of the optical imaging lens of Embodiment 3-1 of the present invention is shown;

[0035] Figure 15 A partial structural schematic diagram of the optical imaging lens of Embodiment 3-2 of the present invention is shown;

[0036] Figure 16 A partial structural schematic diagram of the optical imaging lens of Embodiment 3-3 of the present invention is shown;

[0037] Figures 17 to 19 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens of Embodiment 3 of the present invention are shown respectively.

[0038] Figure 20 and Figure 21 The optical path diagram and stray light spot diagram of an optical imaging lens satisfying (T45+T67) / T56=21.96, f5 / (d5s-d4m)=-11.28 and f6 / (d6s-d5m)=9.24 are shown respectively in an optional embodiment of the present invention.

[0039] Figure 22 and Figure 23 The optical path diagram and stray light spot diagram of an example optical imaging lens satisfying (T45+T67) / T56=21.96, f5 / (d5s-d4m)=-8.77 and f6 / (d6s-d5m)=6.91 are shown respectively.

[0040] Figure 24 and Figure 25 The optical path diagram and stray light spot diagram of another example optical imaging lens satisfying (T45+T67) / T56=21.96, f5 / (d5s-d4m)=-22.89 and f6 / (d6s-d5m)=16.12 are shown respectively.

[0041] The above figures include the following reference numerals:

[0042] E1, First lens; P1, First spacer element; E2, Second lens; P2, Second spacer element; E3, Third lens; P3, Third spacer element; E4, Fourth lens; P4, Fourth spacer element; E5, Fifth lens; P5, Fifth spacer element; E6, Sixth lens; P6, Sixth spacer element; E7, Seventh lens; P7, Seventh spacer element; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens; S13, Object-side surface of the seventh lens; S14, Image-side surface of the seventh lens. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0045] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0046] 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.

[0047] 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 drawn strictly to scale.

[0048] 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 the judgment method commonly known in the art, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object side, 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, 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. In this application, the left side is the object side, and the right side is the image side.

[0049] To address the problem of increased stray light caused by the large spacing between adjacent lenses at the rear end in existing seven-element optical imaging lenses, this invention provides an optical imaging lens.

[0050] like Figures 1 to 21As shown, the optical imaging lens includes a lens barrel, a lens group, and multiple spacer elements assembled in the lens barrel. The lens group consists of seven lenses and includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis direction of the optical imaging lens. There is an air gap between adjacent lenses. The fourth lens has a positive optical power, the fifth lens has a negative optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power. The multiple spacer elements at least include a fourth spacer element, a fifth spacer element, and a sixth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and is in partial contact with the image side surface of the sixth lens. The air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 18.90 ≤ (T45 + T67) / T56 < 22.00. The effective focal length f5 of the fifth lens, the inner diameter d4m of the image side surface of the fourth spacer element, and the inner diameter d5s of the object side surface of the fifth spacer element satisfy: -20.80 < f5 / (d5s - d4m) < -10.75. The effective focal length f6 of the sixth lens, the inner diameter d5m of the image side surface of the fifth spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element satisfy: 8.35 < f6 / (d6s - d5m) < 14.35.

[0051] The optical imaging lens of this application consists of a lens barrel, seven lenses, and at least three spacer elements. It satisfies the following conditions: the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, the seventh lens has negative optical power, and 18.90≤(T45+T67) / T56<22.00. By controlling the distribution of optical power of the rear lenses and maintaining a relatively small air gap between the fifth and sixth lenses on the optical axis, while maintaining a relatively large air gap between the fourth and fifth lenses and between the sixth and seventh lenses on the optical axis, it allows the fourth and fifth lenses, and the sixth and seventh lenses, to distribute light with lower optical power, reducing astigmatism at the edges of the field of view. Furthermore, the combination of opposite positive and negative optical powers of adjacent lenses can better correct axial chromatic aberration and optimize spherical aberration. However, this can easily lead to a large reflection space between the fourth and fifth lenses and between the sixth and seventh lenses, resulting in stray light easily generated at the rear of the optical imaging lens. This exacerbates the phenomenon of non-imaging light reaching the imaging plane, severely affecting the imaging quality of the optical imaging lens. Based on this, this application, by using the ratios of f5 / (d5s-d4m) and f6 / (d6s-d5m), can ensure that f5 and f6 are within a reasonable range, thus constraining the degree of light deflection in the fifth and sixth lenses. Simultaneously, by constraining the inner diameters of the fourth, fifth, and sixth spacers, the height of the light rays propagating in the fifth and sixth lenses can be controlled. This ensures that the imaging light rays pass smoothly through the fourth, fifth, and sixth spacers while effectively blocking the penetration of non-imaging light rays. This effectively reduces stray light generated by reflections of non-imaging light rays at the edge positions of the effective diameters of the object-side surface of the fifth lens and the image-side surface of the sixth lens, thereby guaranteeing the imaging quality of the optical imaging lens.

[0052] In addition, please refer to the following Figures 20 to 25 As shown, under the premise that the optical imaging lens satisfies 18.90≤(T45+T67) / T56<22.00, for example, (T45+T67) / T56=21.96, Figure 20 and Figure 21 The optical path diagram and stray light spot diagram of an optical imaging lens according to an optional embodiment of the present invention are shown respectively. Specifically, in this embodiment, the optical imaging lens satisfies f5 / (d5s-d4m)=-11.28 and f6 / (d6s-d5m)=9.24. This embodiment is referred to as Scheme 1. Figure 22 and Figure 23 The optical path diagram and stray light spot diagram of an example optical imaging lens are shown respectively. Specifically, in this example, the optical imaging lens satisfies f5 / (d5s-d4m)=-8.77 and f6 / (d6s-d5m)=6.91. This example is referred to as Example 1. Figure 24 and Figure 25 The optical path diagram and stray light spot diagram of another example optical imaging lens are shown respectively. Specifically, in this example, the optical imaging lens satisfies f5 / (d5s-d4m)=-22.89 and f6 / (d6s-d5m)=16.12. This example is referred to as Example 2.

[0053] In this optical path diagram, the incident angle of the light rays is one-quarter of the field of view. That is, when the maximum field of view (FOV) of the optical imaging lens is 122.2°, the incident angle of the light rays in the above optical path diagram is 30.55°. The stray light spot diagram simulates the geometric ray point sequence formed by geometric rays on the imaging surface and also shows the energy intensity distribution of the stray light. The X and Y axes represent the spatial position of the imaging surface (unit: mm), showing the peak position of the stray light's energy distribution on the imaging surface. The color intensity represents the strength of the stray light's energy, i.e., the luminous flux of the stray light per square millimeter on the imaging surface (unit: lumens lm) assuming the luminous flux of the principal ray is 1 lm. At this time, half of the full field of view image height (ImgH / 2) of the optical imaging lens is 1.80 mm.

[0054] like Figure 20 As shown, when the optical imaging lens satisfies f5 / (d5s-d4m)=-11.28 and f6 / (d6s-d5m)=9.24, the relative differences in the inner diameters of the fourth, fifth, and sixth spacers are reasonable. Non-imaging rays are effectively blocked by the spacers, and imaging rays do not form reflected stray light at the positions of the fifth and sixth lenses. (See also...) Figure 21 The stray light spot pattern of the optical imaging lens in Scheme 1 shows that the number of stray light spots is small and the light intensity is low. Therefore, it can be concluded that the imaging quality of the optical imaging lens in Scheme 1 is better.

[0055] like Figure 22 As shown, when the optical imaging lens satisfies f5 / (d5s-d4m)=-8.77 and f6 / (d6s-d5m)=6.91, the relative difference in the inner diameters of the fourth, fifth, and sixth spacer elements is too small, causing light to be reflected on the fifth lens, forming reflected stray light. (See also...) Figure 23 The stray light pattern of the optical imaging lens in Example 1 shows that there are many high-energy arc-shaped stray lights, indicating that the imaging quality of the optical imaging lens in Example 1 is poor.

[0056] like Figure 24As shown, when the optical imaging lens satisfies f5 / (d5s - d4m) = -22.89 and f6 / (d6s - d5m) = 16.12, the relative difference in the inner diameters of the fourth spacer element, the fifth spacer element, and the sixth spacer element is too large, causing light to be reflected on the sixth lens, forming reflected stray light. At the same time, referring to Figure 25 the stray light spot pattern of the optical imaging lens in

[0057] it can be seen that the imaging quality of the optical imaging lens in Example 2 is poor because it has arc-shaped stray light and the energy of the arc-shaped stray light is relatively high. In summary, when the optical imaging lens satisfies 18.90 ≤ (T45 + T67) / T56 < 22.00, -20.80 < f5 / (d5s - d4m) < -10.75, and 8.35 < f6 / (d6s - d5m) < 14.35, the relative difference in the inner diameters of the fourth spacer element, the fifth spacer element, and the sixth spacer element is reasonable, and the imaging quality of the optical imaging lens is the best. Therefore, by restricting (T45 + T67) / T56, f5 / (d5s - d4m), and f6 / (d6s - d5m) within a reasonable range, on the basis of restricting the light path, the fourth spacer element, the fifth spacer element, and the sixth spacer element can effectively block the penetration of non-imaging light, effectively reducing the stray light generated by the reflection of non-imaging light at the edge position of the effective diameter of the image side of the fifth lens and the sixth lens, thereby ensuring the imaging quality of the optical imaging lens.

[0058] It should be noted that by restricting (T45 + T67) / T56, f5 / (d5s - d4m), and f6 / (d6s - d5m) within a reasonable range in this application, the stray light generated by the reflection of non-imaging light on the object side of the fifth lens and the image side of the sixth lens can be reduced, and it does not depend on the optical power and surface shape of other lenses. The optical power and surface shape of other lenses are further optimizations of the optical imaging lens on this basis. The optical power of each of the other lenses can be positive or negative according to the actual design requirements of the optical imaging lens, and the surface shape of each lens can also be convex or concave according to the design requirements of the optical imaging lens. When the optical imaging lens satisfies 18.90 ≤ (T45 + T67) / T56 < 22.00; -20.80 < f5 / (d5s - d4m) < -10.75; 8.35 < f6 / (d6s - d5m) < 14.35, the optical imaging lens can reduce the stray light generated by the reflection of non-imaging light on the object side of the fifth lens and the image side of the sixth lens while reasonably arranging the lens intervals.

[0059] For example, in some alternative embodiments, the first lens has a negative optical power, which is conducive to more light entering the optical imaging lens and ensuring a high light input amount of the optical imaging lens. For another example, in some alternative embodiments, the second lens has a positive optical power, which can moderately converge light and balance the aberration brought by the first lens, improving the imaging quality of the optical imaging lens. For another example, in some alternative embodiments, the third lens has a negative optical power, which can further disperse the light from the second lens and flatten the light path. For another example, in some alternative embodiments, the fourth lens has a positive optical power, which appropriately converges the light and balances the aberration brought by the front group of lenses, optimizing the imaging quality. For another example, in some alternative embodiments, the fifth lens has a negative optical power, which reasonably diverges the light and keeps the light path stable. For another example, in some alternative embodiments, the sixth lens has a positive optical power, which moderately converges the light, avoids excessive divergence of the light, and balances the aberration brought by the front negative lens. For another example, in some alternative embodiments, the seventh lens has a negative optical power, which reasonably diverges the light to the imaging surface, ensuring the imaging quality. For another example, in some alternative embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The object side surface of the second lens is convex, and the image side surface of the second lens is convex. The object side surface of the third lens is concave, and the image side surface of the third lens is convex. The object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex. The object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex. The object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. By reasonably restricting the surface types of each lens, it is conducive to reasonably restricting the light path, ensuring a smooth transition of the light, and being conducive to correcting aberration.

[0060] In some alternative embodiments, the relationship among the radius of curvature R9 of the object side surface of the fifth lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfies: 0.65 < R9 / (D4m - d4m) < 1.25. By controlling R9 / (D4m - d4m) within a reasonable range, it is conducive to controlling the path of the marginal field light of the fifth lens, improving the marginal field illuminance of the optical imaging lens, and further ensuring the imaging quality of the optical imaging lens. At the same time, restricting the outer and inner diameters of the fourth spacer element can also play a role in blocking non-imaging light from reaching the rear lens, reducing the risk of stray light generated by the rear lens.

[0061] In some optional embodiments, the radius of curvature R12 of the image side of the sixth lens, the inner diameter d6s of the object side of the sixth spacer element, and the outer diameter D6m of the image side of the sixth spacer element satisfy: -10.60 < R12 / (D6m - d6s) < -0.90. Since the air gap between the sixth lens and the seventh lens on the optical axis is relatively large, the light rays have a larger reflection space between the sixth lens and the seventh lens, and it is easier to generate stray light in the non-effective diameter region of the sixth lens and the seventh lens. By controlling R12 / (D6m - d6s) within a reasonable range, the difference between the outer diameter of the image side and the inner diameter of the object side of the sixth spacer element can be limited, so that the sixth spacer element can effectively prevent non-imaging light rays from reflecting in the non-effective diameter region of the sixth lens and the seventh lens, reducing the risk of generating stray light in the sixth lens and the seventh lens, and thus contributing to improving the overall imaging quality of the optical imaging lens.

[0062] In some optional embodiments, the spacing distance EP45 between the image side of the fourth spacer element and the object side of the fifth spacer element in the optical axis direction, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.40 < EP45 / T45 < 2.15. By controlling EP45 / T45 within a reasonable range, the edge thickness and structural strength of the fifth lens can be effectively ensured, reducing the deformation generated when the fifth lens is squeezed during the assembly process, and thus ensuring the optical performance and structural stability of the fifth lens.

[0063] In some optional embodiments, the inner diameter d6m of the image side of the sixth spacer element and the maximum effective radius DT71 of the object side of the seventh lens satisfy: 1.65 < d6m / DT71 ≤ 1.95. By controlling d6m / DT71 within a reasonable range and controlling the ratio of the inner diameter of the image side of the sixth spacer element to the maximum effective radius of the object side of the seventh lens, the range of light rays entering the seventh lens can be effectively controlled, and then the range of light rays transmitted to the imaging surface can be controlled, which is beneficial to reducing the distortion of the edge field of view of the imaging surface.

[0064] In some optional embodiments, the maximum thickness CP6 of the sixth spacer element in the optical axis direction and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.00 < CP6 / CT7 < 0.10. Since the effective diameter region of the seventh lens is relatively more distorted than that of other lenses, on the premise of ensuring the normal imaging of the optical imaging lens, CP6 / CT7 can be controlled within a reasonable range to limit the central thickness of the seventh lens on the optical axis, so that there is a certain distance on the optical axis between the image side of the seventh lens and the image-side end face of the lens barrel, preventing the seventh lens from protruding from the image-side end of the lens barrel and avoiding the risk of physical interference of the seventh lens with the structure at the back end.

[0065] In some optional embodiments, the following relationship is satisfied among the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, and the outer diameter D5s of the object side surface of the fifth spacer element: -5.35 < (R11 + R12) / D5s < -0.05. By controlling (R11 + R12) / D5s within a reasonable range, the surface shape of the sixth lens is ensured to be reasonable, the molding stability of the sixth lens is effectively improved, which is beneficial to maintaining the stability of the optical performance of the sixth lens. At the same time, the outer dimensions of the sixth lens are controlled to meet the requirements of the overall miniaturization design of the lens.

[0066] In some optional embodiments, the following relationship is satisfied among the spacing distance EP56 between the image side surface of the fifth spacer element and the object side surface of the sixth spacer element in the optical axis direction, the central thickness CT6 of the sixth lens on the optical axis, and the refractive index N6 of the sixth lens: 0.35 < EP56 / (CT6 × N6) ≤ 0.55. By controlling EP56 / (CT6 × N6) within a reasonable range, the central thickness and edge thickness of the sixth lens can be effectively controlled, thereby improving the uniformity of the overall thickness of the sixth lens, avoiding the occurrence of welding marks during the molding of the sixth lens, and reducing the risk of uneven stress during the assembly of the sixth lens. Furthermore, the yield rate of the sixth lens and the stability of the sixth lens assembly are improved, which is beneficial to ensuring the imaging stability of the optical imaging lens.

[0067] In some optional embodiments, the following relationship is satisfied among the combined focal length f56 of the fifth lens and the sixth lens, the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element in the optical axis direction, and the spacing distance EP56 between the image side surface of the fifth spacer element and the object side surface of the sixth spacer element in the optical axis direction: 6.05 < f56 / (EP45 + EP56) < 12.50. By controlling f56 / (EP45 + EP56) within a reasonable range, the ability of the fifth lens and the sixth lens to converge light can be ensured, thereby improving the light transmittance of the optical imaging lens, which is beneficial to improving the overall imaging quality of the optical imaging lens.

[0068] In some optional embodiments, the following relationship is satisfied between the outer diameter D0m of the image side end face of the lens barrel and the outer diameter D6s of the object side surface of the sixth spacer element: 1.05 < D0m / D6s < 1.65. By controlling D0m / D6s within a reasonable range, the outer diameter size of the image side end of the lens barrel is restricted, the wall thickness of the image side end of the lens barrel is maintained reasonable, avoiding the situation of abnormal molding of the lens barrel due to excessive wall thickness of the image side end of the lens barrel, ensuring good assembly of the seventh lens and the image side end of the lens barrel, and avoiding affecting the coaxiality of the seventh lens.

[0069] In some optional embodiments, the inner diameter d0m of the image-side end face of the lens barrel and the radius of curvature R14 of the image-side surface of the seventh lens satisfy: 2.85 < d0m / R14 < 4.20. Since the surface profile and radius of curvature of the seventh lens vary greatly, controlling d0m / R14 within a reasonable range and restricting the radius of curvature of the image-side surface of the seventh lens and the inner diameter of the image-side end face of the lens barrel can ensure a reasonable surface shape of the seventh lens, which helps to improve the stability of the seventh lens during molding. At the same time, indirectly restricting the outer diameter size of the seventh lens can prevent the problem of difficult demolding caused by incomplete filling during the molding of the seventh lens. In addition, an appropriate ratio of d0m / R14 helps to ensure that the outer ring surface of the seventh lens can be matched with the inner ring surface of the image-side end of the lens barrel during assembly, reducing assembly problems caused by size mismatch.

[0070] In some optional embodiments, the effective focal length f7 of the seventh lens and the inner diameter d6m of the image-side surface of the sixth spacer element satisfy: -2.30 < f7 / d6m < -1.75. By controlling f7 / d6m within a reasonable range, it is beneficial to adjust the transmission path of light after passing through the seventh lens, ensuring that the effective imaging light can be accurately focused on the imaging surface and guaranteeing the imaging ability of the optical imaging lens. In addition, an appropriate ratio of f7 / d6m helps the sixth spacer element to intercept non-imaging light, reducing the generation of stray light and improving the clarity and contrast of the imaging.

[0071] In some optional embodiments, the plurality of spacer elements further includes a seventh spacer element, which is located on the image side of the seventh lens and partially contacts the image-side surface of the seventh lens. The maximum thickness CP6 of the sixth spacer element in the optical axis direction, the spacing distance EP67 between the image-side surface of the sixth spacer element and the object-side surface of the seventh spacer element in the optical axis direction, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the central thickness CT7 of the seventh lens on the optical axis satisfy: 0.50 < (CP6 + EP67) / (T67 + CT7) < 0.75. By controlling (CP6 + EP67) / (T67 + CT7) within a reasonable range, the spatial layout of the sixth lens and the seventh lens can be made more reasonable, ensuring a certain air gap on the optical axis between the image-side surface of the seventh lens and the image-side end face of the lens barrel, preventing the seventh lens from protruding beyond the image-side end face of the lens barrel, which helps to avoid the problem of the seventh lens protruding from the image-side end of the lens barrel. At the same time, sufficient thickness space is reserved for the seventh spacer element to prevent the thickness of the seventh spacer element from being too thin, resulting in the inability of the optical imaging lens to self-lock, ensuring the stability and reliability of the optical imaging lens during use.

[0072] In some optional embodiments, the plurality of spacer elements further includes a seventh spacer element, which is located on the image side of the seventh lens and is in contact with a part of the image side surface of the seventh lens. The distance L between the object-side end face and the image-side end face of the lens barrel in the optical axis direction and the spacer distance EP47 between the image side surface of the fourth spacer element and the object side surface of the seventh spacer element satisfy: 3.10 < L / EP47 < 3.60. By controlling L / EP47 within a reasonable range, the axial length of the optical imaging lens can be limited, while the distance from the fourth spacer element to the seventh spacer element is constrained, and the edge thicknesses of the fifth lens, the sixth lens, and the seventh lens are optimized, which is beneficial to further ensuring the compactness of the optical imaging lens, thereby achieving miniaturization of the optical imaging lens.

[0073] In some optional embodiments, the maximum field of view FOV of the optical imaging lens satisfies: 120° < FOV < 125°. Preferably, 122° < FOV < 123°.

[0074] In some optional embodiments, the full-field image height ImgH of the optical imaging lens satisfies: 3.50 mm < ImgH < 3.80 mm. Preferably, 3.55 mm ≤ ImgH ≤ 3.78 mm.

[0075] In some optional embodiments, the effective focal length f of the optical imaging lens satisfies: 3.00 mm < f < 3.30 mm. Preferably, 3.05 mm < f ≤ 3.25 mm.

[0076] In another aspect, in another optional embodiment, an optical imaging lens is provided, which includes a lens barrel, a lens group and a plurality of spacer elements assembled in the lens barrel. The lens group consists of seven lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis direction of the optical imaging lens. There is an air gap between adjacent lenses. The fourth lens has a positive optical power, the fifth lens has a negative optical power, the sixth lens has a positive optical power, and the seventh lens has a negative optical power. The plurality of spacer elements at least include a fourth spacer element, a fifth spacer element and a sixth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and is in partial contact with the image side surface of the sixth lens. The air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: 18.90 ≤ (T45 + T67) / T56 < 22.00. The curvature radius R9 of the object side surface of the fifth lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfy: 0.65 < R9 / (D4m - d4m) < 1.25. The curvature radius R12 of the image side surface of the sixth lens, the inner diameter d6s of the object side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element satisfy: -10.60 < R12 / (D6m - d6s) < -0.90.

[0077] The optical imaging lens of this application consists of a lens barrel, seven lenses, and at least three spacer elements. It satisfies the following conditions: the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, the seventh lens has negative optical power, and 18.90≤(T45+T67) / T56<22.00. By controlling the distribution of optical power of the rear lenses and maintaining a relatively small air gap between the fifth and sixth lenses on the optical axis, while maintaining a relatively large air gap between the fourth and fifth lenses and between the sixth and seventh lenses on the optical axis, it allows the fourth and fifth lenses, and the sixth and seventh lenses, to distribute light with lower optical power, reducing astigmatism at the edges of the field of view. Furthermore, the combination of opposite positive and negative optical powers of adjacent lenses can better correct axial chromatic aberration and optimize spherical aberration. However, this can easily lead to a large reflection space between the fourth and fifth lenses and between the sixth and seventh lenses, resulting in stray light easily generated at the rear of the optical imaging lens. This exacerbates the phenomenon of non-imaging light reaching the imaging plane, severely affecting the imaging quality of the optical imaging lens. Based on this, by constraining R9 / (D4m-d4m) and R12 / (D6m-d6s) within a reasonable range, this application can control the light-reflection capability of the object-side surface of the fifth lens and the image-side surface of the sixth lens. It can also control the range of light rays that can pass through the fourth and sixth spacers, reducing large-angle deflected light and stray light generation. Simultaneously, the fourth spacer prevents non-imaging light rays from reflecting in the ineffective diameter regions of the fourth and fifth lenses, and the sixth spacer effectively prevents non-imaging light rays from reflecting in the ineffective diameter regions of the sixth and seventh lenses, reducing the risk of stray light generation between the fourth and fifth lenses, and between the sixth and seventh lenses. This, in turn, improves the overall imaging quality of the optical imaging lens. Furthermore, constraining the light-reflection capability of the object-side surface of the fifth lens and the image-side surface of the sixth lens reduces large-angle deflected light, further reducing stray light generation. It also controls the range of light rays that can pass through the fourth and sixth spacers, which helps reduce light rays deflected into the ineffective diameter regions of the fifth and sixth lenses, thus improving the imaging quality of the optical imaging lens.

[0078] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0079] In another alternative embodiment, an optical imaging lens is provided, comprising a lens barrel and a lens group and a plurality of spacers mounted within the lens barrel. The lens group consists of seven lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side to the image side along the optical axis of the optical imaging lens, with air gaps between adjacent lenses. The fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power. The plurality of spacers includes at least a fourth spacer, a fifth spacer, and a sixth spacer, with the fourth spacer located between the fourth and fifth lenses and adjacent to the fourth lens. The image-side surface of the lens is in contact with the fifth spacer element, which is located between the fifth and sixth lenses and in contact with the image-side surface of the fifth lens. The sixth spacer element is located between the sixth and seventh lenses and in contact with the image-side surface of the sixth lens. The air gaps T45 between the fourth and fifth lenses on the optical axis, T56 between the fifth and sixth lenses on the optical axis, and T67 between the sixth and seventh lenses on the optical axis satisfy the following: 18.90 ≤ (T45 + T67) / T56 < 22.00. The combined focal length f56 of the fifth and sixth lenses, the inner diameter d4m of the image-side surface of the fourth spacer element, and the inner diameter d6s of the object-side surface of the sixth spacer element satisfy the following: 9.75 <f56 / (d6s-d4m)<26.30。

[0080] The optical imaging lens of this application consists of a lens barrel, seven lenses, and at least three spacer elements. It satisfies the following conditions: the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, the seventh lens has negative optical power, and 18.90≤(T45+T67) / T56<22.00. By controlling the distribution of optical power of the rear lenses and maintaining a relatively small air gap between the fifth and sixth lenses on the optical axis, while maintaining a relatively large air gap between the fourth and fifth lenses and between the sixth and seventh lenses on the optical axis, it allows the fourth and fifth lenses, and the sixth and seventh lenses, to distribute light with lower optical power, reducing astigmatism at the edges of the field of view. Furthermore, the combination of opposite positive and negative optical powers of adjacent lenses can better correct axial chromatic aberration and optimize spherical aberration. However, this can easily lead to a large reflection space between the fourth and fifth lenses and between the sixth and seventh lenses, resulting in stray light easily generated at the rear of the optical imaging lens. This exacerbates the phenomenon of non-imaging light reaching the imaging plane, severely affecting the imaging quality of the optical imaging lens. Based on this, this application, by using the ratio f56 / (d6s-d4m), can ensure that f56 is within a reasonable range to control the degree of light deflection by the fifth and sixth lenses, while simultaneously controlling the relative inner diameter of the fourth and sixth spacers. This allows the fourth and sixth spacers to block the transmission of non-imaging light rays. Furthermore, the fourth spacer can prevent reflection of non-imaging light rays in the ineffective diameter areas of the fourth and fifth lenses, and the sixth spacer can prevent reflection of non-imaging light rays in the ineffective diameter areas of the sixth and seventh lenses. This reduces the risk of stray light between the fourth and fifth lenses, and between the sixth and seventh lenses, thereby improving the overall imaging quality of the optical imaging lens.

[0081] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0082] Optionally, the aforementioned optical imaging lens may also include a filter located in front of the imaging lens.

[0083] Optionally, the aforementioned optical imaging lens may also include protective glass for protecting the photosensitive element located on the imaging surface.

[0084] It should be noted that each lens consists of an effective optical diameter region at the center and an optical structure region at the edge. The optical structure region is located on the outer periphery of the effective optical diameter region and is arranged circumferentially around it. The effective optical diameter region is used for the passage of imaging light rays, while the optical structure region is not used for the passage of imaging light rays. The optical structure region is used to contact the lens barrel, adjacent lenses, or adjacent spacer elements. The optical structure region is also called the non-effective optical diameter region.

[0085] In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0086] Figure 1 A schematic diagram showing the dimensions of an optical imaging lens according to this application is provided. Figure 1 The parameters d4m, D4m, d5s, d5m, D5s, d6s, d6m, D6s, D6m, d0m, D0m, EP45, EP56, CP6, EP67, L, EP47, and DT71 are clearly and intuitively illustrated to provide a clear understanding of their meaning. To facilitate the description of optical imaging lenses and specific lens shapes, these parameters will not be shown in the accompanying drawings when describing specific embodiments.

[0087] It should be noted that the object-side end face of the lens tube refers to the surface of the lens tube closest to the object side and perpendicular to the optical axis, the image-side end face of the lens tube refers to the surface of the lens tube closest to the image side and perpendicular to the optical axis, the object-side side of the spacer element refers to the surface of the spacer element closest to the object side and perpendicular to the optical axis, and the image-side side of the spacer element refers to the surface of the spacer element closest to the image side and perpendicular to the optical axis.

[0088] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments.

[0089] It should be noted that in the following Embodiment 1, there are Embodiments 1-1, 1-2, and 1-3; in Embodiment 2, there are Embodiments 2-1, 2-2, and 2-3; and in Embodiment 3, there are Embodiments 3-1, 3-2, and 3-3. Within the same embodiment, the first to seventh lenses of the optical imaging lens have the same radius of curvature, center thickness, and other parameters, as well as the inter-lens spacing and higher-order coefficients. However, the lens barrel, the thickness, inner diameter, and outer diameter of the first to seventh spacer elements, and the shape of some lenses are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0090] It should be noted that any of the embodiments described in Examples 1 to 3 below are applicable to all implementation methods of this application.

[0091] Example 1

[0092] like Figures 2 to 7As shown, the optical imaging lens of Embodiment 1 is described. Figure 2 A schematic diagram of the optical imaging lens of Embodiment 1-1 is shown. Figure 3 The diagram shows the structure of the optical imaging lens in Embodiments 1-2. Figure 4 A schematic diagram of the optical imaging lens of Embodiments 1-3 is shown.

[0093] like Figures 2 to 4 As shown, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacer elements. The lens barrel includes, in order from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, and a seventh spacer element P7.

[0094] like Figure 2 The diagram shows a schematic of the optical imaging lens in Embodiment 1-1. In this embodiment, the object-side surface S1 of the first lens is in contact with the lens barrel; the object-side surface and image-side surface of the first spacer element P1 are in partial contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively; the object-side surface and image-side surface of the second spacer element P2 are in partial contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively; the object-side surface and image-side surface of the third spacer element P3 are in partial contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively; the object-side surface and image-side surface of the fourth spacer element P4 are in partial contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively; the object-side surface and image-side surface of the fifth spacer element P5 are in partial contact with the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively; the object-side surface and image-side surface of the sixth spacer element P6 are in partial contact with the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively; and the object-side surface of the seventh spacer element P7 is in partial contact with the image-side surface S14 of the seventh lens.

[0095] like Figure 3 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 1-2. The bearing and contact methods of each spacer element are the same as in Embodiment 1-1, and can be referred to the relevant description in Embodiment 1-1, which will not be repeated here.

[0096] like Figure 4 The diagram shown is a structural schematic of the optical imaging lens of Embodiments 1-3. The bearing and contact methods of each spacer element are the same as those in Embodiment 1-1, and can be referred to the relevant descriptions in Embodiment 1-1, which will not be repeated here.

[0097] In summary, the structural parameters of the optical imaging lens of Embodiment 1 under Embodiments 1-1, 1-2, and 1-3 are shown in Table 8.

[0098] In Embodiment 1, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. In Table 1, OBJ (not shown in the figure) is the object plane of the optical imaging lens, S15 and S16 (not shown in the figure) can be the object-side and image-side surfaces of the filter or protective glass, and S17 (not shown in the figure) is the imaging plane of the optical imaging lens. Light rays from the object plane pass through S1 to S16 to reach the imaging plane S17 (not shown in the figure).

[0099] Table 1 shows the basic structural parameters of the optical imaging lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0100]

[0101]

[0102] Table 1

[0103] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0104]

[0105] Where x is the distance vector from the vertex of the aspherical surface at a height 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. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror S1-S14 in Example 1.

[0106]

[0107]

[0108] Table 2

[0109] Figure 5 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7 The distortion curve of the optical imaging lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different field of view angles.

[0110] according to Figures 5 to 7 As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0111] Example 2

[0112] like Figures 8 to 13 As shown, the optical imaging lens of Embodiment 2 is described. Figure 8 A schematic diagram of the optical imaging lens of Embodiment 2-1 is shown. Figure 9 A schematic diagram of the optical imaging lens of Embodiment 2-2 is shown. Figure 10 A schematic diagram of the optical imaging lens of Embodiments 2-3 is shown.

[0113] like Figures 8 to 10 As shown, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacer elements. The lens barrel includes, in order from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, and a seventh spacer element P7.

[0114] like Figure 8The diagram shows a schematic of the optical imaging lens in Embodiment 2-1. In this embodiment, the object-side surface S1 of the first lens is in contact with the lens barrel; the object-side surface and image-side surface of the first spacer P1 are in partial contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively; the object-side surface and image-side surface of the second spacer P2 are in partial contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively; the object-side surface and image-side surface of the third spacer P3 are in partial contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively; the object-side surface and image-side surface of the fourth spacer P4 are in partial contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively; the object-side surface and image-side surface of the fifth spacer P5 are in partial contact with the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively; the object-side surface and image-side surface of the sixth spacer P6 are in partial contact with the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively; and the object-side surface of the seventh spacer P7 is in partial contact with the image-side surface S14 of the seventh lens.

[0115] like Figure 9 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-2. The bearing and contact methods of each spacer element are the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0116] like Figure 10 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-3. The bearing and contact methods of each spacer element are the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0117] In summary, the structural parameters of the optical imaging lens of Embodiment 2 under Embodiments 2-1, 2-2, and 2-3 are shown in Table 8.

[0118] In Embodiment 2, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. In Table 3, OBJ (not shown in the figure) is the object plane of the optical imaging lens, S15 and S16 (not shown in the figure) can be the object-side and image-side surfaces of the filter or protective glass, and S17 (not shown in the figure) is the imaging plane of the optical imaging lens. Light rays from the object plane pass through S1 to S16 to reach the imaging plane S17 (not shown in the figure).

[0119] Table 3 shows the basic structural parameters of the optical imaging lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0120] Face number Surface type radius of curvature Thickness / Distance Refractive index Abbe number Conic coefficient OBJ spherical endless endless S1 aspherical 4.0859 0.3565 1.55 56.00 0.0000 S2 aspherical 1.5467 1.7787 -1.0000 S3 aspherical 25.6607 1.4371 1.55 56.00 0.0000 S4 aspherical -3.0105 0.0670 0.0000 S5 aspherical -2.6324 0.3565 1.61 25.60 0.0000 S6 aspherical -4.0157 0.1800 0.0000 S7 aspherical 3.1104 0.7911 1.55 56.00 0.0000 S8 aspherical -16.6240 0.4415 0.0000 S9 aspherical 4.9933 0.3565 1.65 21.57 0.0000 S10 aspherical 2.2989 0.0856 0.0000 S11 aspherical 2.8194 0.7060 1.55 56.00 0.0000 S12 aspherical -40.6509 1.4089 0.0000 S13 aspherical 27.4768 0.4691 1.64 22.05 0.0000 S14 aspherical 3.6295 0.1235 0.0000 S15 spherical endless 0.2100 1.52 64.17 S16 spherical endless 0.8898 S17 spherical endless

[0121] Table 3

[0122] Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror S1-S14 in Example 2. Among them, each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0123]

[0124]

[0125] Table 4

[0126] Figure 11 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 12 The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 13 The distortion curve of the optical imaging lens of Embodiment 2 is shown, which represents the distortion magnitude value corresponding to different field of view angles.

[0127] according to Figures 11 to 13 It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0128] Example 3

[0129] like Figures 14 to 19 As shown, the optical imaging lens of Embodiment 3 is described. Figure 14 A schematic diagram of the optical imaging lens of Embodiment 3-1 is shown. Figure 15 A schematic diagram of the optical imaging lens of Embodiment 3-2 is shown. Figure 16 A schematic diagram of the optical imaging lens of Embodiment 3-3 is shown.

[0130] like Figures 14 to 16 As shown, the optical imaging lens includes a lens barrel, seven lenses, and multiple spacer elements. The lens barrel includes, in order from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, and a seventh spacer element P7.

[0131] like Figure 14 The diagram shows a schematic of the optical imaging lens in Embodiment 3-1. In this embodiment, the object-side surface S1 of the first lens is in contact with the lens barrel; the object-side surface and image-side surface of the first spacer P1 are in partial contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively; the object-side surface and image-side surface of the second spacer P2 are in partial contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively; the object-side surface and image-side surface of the third spacer P3 are in partial contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively; the object-side surface and image-side surface of the fourth spacer P4 are in partial contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively; the object-side surface and image-side surface of the fifth spacer P5 are in partial contact with the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively; the object-side surface and image-side surface of the sixth spacer P6 are in partial contact with the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively; and the object-side surface of the seventh spacer P7 is in partial contact with the image-side surface S14 of the seventh lens.

[0132] like Figure 15 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 3-2. The abutment and contact methods of each spacer element are the same as in Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0133] like Figure 16The diagram shown is a structural schematic of the optical imaging lens of Embodiment 3-3. The bearing and contact methods of each spacer element are the same as those in Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0134] In summary, the structural parameters of the optical imaging lens of Embodiment 3 under Embodiments 3-1, 3-2, and 3-3 are shown in Table 8.

[0135] In Embodiment 3, the first lens E1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is convex. The third lens E3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens E6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is convex, and its image-side surface S14 is concave. In Table 5, OBJ (not shown in the figure) is the object plane of the optical imaging lens, S15 and S16 (not shown in the figure) can be the object-side and image-side surfaces of the filter or protective glass, and S17 (not shown in the figure) is the imaging plane of the optical imaging lens. Light rays from the object plane pass through S1 to S16 to reach the imaging plane S17 (not shown in the figure).

[0136] Table 5 shows the basic structural parameters of the optical imaging lens in Embodiment 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0137]

[0138]

[0139] Table 5

[0140] Table 6 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1-S14 in Example 3. The aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0141] Face number A4 A6 A8 A10 A12 A14 A16 S1 2.5820E-03 -4.0597E-03 5.8846E-04 -4.3167E-05 1.6697E-06 -3.2363E-08 1.7644E-10 S2 3.1798E-02 -1.2303E-03 5.6402E-04 -1.0872E-03 1.1998E-03 -6.7649E-04 2.2681E-04 S3 -2.3209E-05 -2.3065E-05 3.3890E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.6585E-04 -1.9429E-05 -7.5996E-07 1.4898E-07 0.0000E+00 0.0000E+00 0.0000E+00 S5 -1.3235E-02 2.7899E-03 -1.2763E-03 2.7295E-04 -2.5259E-05 8.7091E-07 0.0000E+00 S6 -1.2285E-05 -1.2820E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 7.1663E-03 -2.8154E-03 8.2740E-04 -1.9090E-04 2.4055E-05 -1.2389E-06 0.0000E+00 S8 -2.8464E-02 8.7067E-03 -2.4534E-03 8.3374E-04 -2.4168E-04 4.0409E-05 -2.6066E-06 S9 -8.3830E-02 1.9847E-02 -2.5327E-03 1.8087E-04 -6.5090E-06 0.0000E+00 0.0000E+00 S10 -1.0652E-01 4.8978E-02 -1.5967E-02 3.4329E-03 -4.6784E-04 3.3493E-05 -9.9061E-07 S11 -5.4116E-02 3.4063E-02 -1.0460E-02 7.4359E-04 4.6710E-04 -1.2657E-04 9.3533E-06 S12 -2.3886E-02 1.1169E-02 -3.3918E-03 7.1396E-04 -8.2542E-05 4.6865E-06 -1.0197E-07 S13 -1.6665E-01 3.5553E-02 -5.3674E-02 1.5532E-01 -3.1008E-01 4.2023E-01 -3.9921E-01 S14 -1.6667E-01 8.4108E-02 -7.0240E-02 4.7568E-02 -2.0899E-02 5.6884E-03 -9.2838E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -4.1220E-05 3.2284E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 2.7060E-01 -1.3156E-01 4.5515E-02 -1.0937E-02 1.7346E-03 -1.6327E-04 6.9066E-06 S14 8.3259E-05 -3.1575E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0142] Table 6

[0143] Figure 17 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 18 The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 19 The distortion curve of the optical imaging lens of Embodiment 3 is shown, which represents the distortion magnitude value corresponding to different field of view angles.

[0144] according to Figures 17 to 19 It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0145] In summary, the optical imaging lenses of Examples 1 to 3 respectively satisfy the relationships shown in Table 7.

[0146] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 (T45+T67) / T56 21.96 21.96 21.96 21.62 21.62 21.62 18.90 18.90 18.90 f5 / (d5s-d4m) -11.28 -12.32 -10.79 -19.41 -19.38 -19.77 -20.77 -19.40 -19.56 f6 / (d6s-d5m) 9.24 8.38 10.51 12.70 11.96 13.32 13.32 14.31 14.08 R9 / (D4m-d4m) 1.20 1.19 1.21 0.70 0.70 1.10 0.69 0.68 1.09 R12 / (D6m-d6s) -0.93 -0.92 -0.94 -5.95 -5.92 -10.58 -4.20 -4.12 -7.55 EP45 / T45 1.58 1.45 1.53 2.04 2.11 2.11 1.44 1.50 1.45 d6m / DT71 1.95 1.95 1.93 1.87 1.89 1.68 1.90 1.90 1.91 CP6 / CT7 0.06 0.06 0.07 0.05 0.05 0.04 0.06 0.06 0.05 (R11+R12) / D5s -0.07 -0.07 -0.09 -3.83 -3.81 -5.34 -2.36 -2.34 -3.26 EP56 / (CT6×N6) 0.45 0.49 0.39 0.52 0.55 0.50 0.47 0.44 0.46 f56 / (EP45+EP56) 6.09 6.18 6.59 11.43 11.02 11.34 12.46 12.35 12.43 D0m / D6s 1.08 1.07 1.09 1.14 1.14 1.63 1.16 1.15 1.62 d0m / R14 3.95 3.92 3.87 2.90 2.90 2.86 4.14 4.19 4.10 (CP6+EP67) / (T67+CT7) 0.66 0.64 0.71 0.53 0.52 0.54 0.52 0.53 0.51 L / EP47 3.11 3.19 3.18 3.46 3.42 3.42 3.55 3.51 3.57 f7 / d6m -1.78 -1.77 -1.79 -2.05 -2.04 -2.29 -2.05 -2.06 -2.05 f56 / (d6s-d4m) 9.79 9.80 10.10 24.21 23.54 24.94 26.05 26.26 25.89

[0147] Table 7

[0148] Table 8 shows some parameters of the optical imaging lenses in Embodiments 1 to 3. Wherein, FOV is the maximum field of view of the optical imaging lens, f is the effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, f56 is the combined focal length of the fifth and sixth lenses, and ImgH is the full field-of-view image height of the optical imaging lens, which can also be understood as the diagonal length of the effective pixel area on the imaging plane of the optical imaging lens.

[0149]

[0150]

[0151] Table 8

[0152] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone 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.

[0153] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0154] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0155] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0156] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that, It includes a lens barrel and a lens assembly and multiple spacer elements assembled within the lens barrel. The lens group consists of seven lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially from the object side to the image side along the optical axis of the optical imaging lens, with air gaps between adjacent lenses. The fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power. The plurality of spacers includes at least a fourth spacer, a fifth spacer, and a sixth spacer. The fourth spacer is located between the fourth lens and the fifth lens and contacts the image-side side of the fourth lens. The fifth spacer is located between the fifth lens and the sixth lens and contacts the image-side side of the fifth lens. The sixth spacer is located between the sixth lens and the seventh lens and contacts the image-side side of the sixth lens. The air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical imaging lens, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following condition: 18.90≤(T45+T67) / T56<22.00; The effective focal length f5 of the fifth lens, the inner diameter d4m of the image-side surface of the fourth spacer element, and the inner diameter d5s of the object-side surface of the fifth spacer element satisfy the following condition: -20.80 <f5 / (d5s-d4m)<-10.75; The effective focal length f6 of the sixth lens, the inner diameter d5m of the image side of the fifth spacer element, and the inner diameter d6s of the object side of the sixth spacer element satisfy the following condition: 8.35 <f6 / (d6s-d5m)<14.35。 2. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R9 of the object-side surface of the fifth lens, the outer diameter D4m of the image-side surface of the fourth spacer element, and the inner diameter d4m of the image-side surface of the fourth spacer element satisfy the following relationship: 0.65 <R9 / (D4m-d4m)<1.25。 3. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R12 of the image-side surface of the sixth lens, the inner diameter d6s of the object-side surface of the sixth spacer element, and the outer diameter D6m of the image-side surface of the sixth spacer element satisfy the following condition: -10.60 <R12 / (D6m-d6s)<-0.90。 4. The optical imaging lens according to claim 1, characterized in that, The distance EP45 between the image-side surface of the fourth spacer element and the object-side surface of the fifth spacer element along the optical axis, and the air gap T45 between the fourth lens and the fifth lens along the optical axis, satisfy: 1.40 <EP45 / T45<2.15。 5. The optical imaging lens according to claim 1, characterized in that, The inner diameter d6m of the image-side surface of the sixth spacer element and the maximum effective radius DT71 of the object-side surface of the seventh lens satisfy the following relationship: 1.65 <d6m / DT71≤1.95。 6. The optical imaging lens according to claim 1, characterized in that, The sixth spacer element satisfies a maximum thickness CP6 along the optical axis and a center thickness CT7 of the seventh lens along the optical axis, satisfying the following condition: 0.

00. <CP6 / CT7<0.10。 7. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R11 of the object side of the sixth lens, the radius of curvature R12 of the image side of the sixth lens, and the outer diameter D5s of the object side of the fifth spacer element satisfy the following condition: -5.35 < (R11 + R12) / D5s < -0.

05.

8. The optical imaging lens according to claim 1, characterized in that, The spacing EP56 between the image-side surface of the fifth spacer element and the object-side surface of the sixth spacer element along the optical axis, the center thickness CT6 of the sixth lens along the optical axis, and the refractive index N6 of the sixth lens satisfy the following condition: 0.

35. <EP56 / (CT6×N6)≤0.55。 9. The optical imaging lens according to claim 1, characterized in that, The combined focal length f56 of the fifth and sixth lenses, the distance EP45 between the image-side surface of the fourth spacer element and the object-side surface of the fifth spacer element in the optical axis direction, and the distance EP56 between the image-side surface of the fifth spacer element and the object-side surface of the sixth spacer element in the optical axis direction satisfy the following condition: 6.05 <f56 / (EP45+EP56)<12.50。 10. The optical imaging lens according to claim 1, characterized in that, The outer diameter D0m of the image-side end face of the lens tube and the outer diameter D6s of the object-side end face of the sixth spacer element satisfy the following condition: 1.05 <D0m / D6s<1.65。

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