Optical lens

Abstract

The invention provides an optical lens including: a lens group including first to seventh lenses; the spacer group at least comprises a second spacer which is arranged between the second lens and the third lens and is at least partially contacted with the image side surface of the second lens, and a third spacer which is arranged between the third lens and the fourth lens and is at least partially contacted with the image side surface of the third lens; a lens barrel; the inner diameter d0m of the end face of the image side of the lens barrel and the effective focal length f of the optical lens meet the following conditions: 1.90 lt; d0m / flt; 2.10, 2.10; the spacing distance EP23 between the second spacer and the third spacer along the direction of the optical axis of the optical lens, the maximum thickness CP3 of the third spacer and the air gap T34 between the third lens and the fourth lens on the optical axis meet the following conditions: 1.60 < = (EP2 + CP3) / T34lt; 2.15, 2.15; the curvature radius R6 of the image side surface of the third lens, the curvature radius R7 of the object side surface of the fourth lens and the inner diameter d3s of the object side surface of the third spacer meet the following formula:-12.40 lt; (R6 + R7) / d3slt; and-10.60,-10.60. The problem that stray light is easily generated in the middle of an optical lens in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical lens. Background Art

[0002] With the rapid development and popularization of electronic devices such as mobile phones, optical lenses have been continuously updated and iterated. To meet users' higher requirements for shooting functions, such as shooting details, imaging range, and clarity, the improvement of optical performance in terminal lenses has become an important research direction at present. As an optical lens with a relatively large number of lenses, the seven-piece optical lens uses a large number of spacers inside to maintain stable assembly. On the original set path of light, the inner diameter surface of the spacer in the middle of the lens is prone to multiple reflections of light. In addition, improper setting of the lens size is also likely to cause marginal light to enter the mechanism part of the lens, thereby increasing the intensity of stray light and affecting the imaging effect. Therefore, how to set the sizes of the lenses and spacers in the middle of the optical lens to reduce stray light and improve imaging cleanliness is a very urgent problem. Summary of the Invention

[0003] The main object of the present invention is to provide an optical lens to solve the problem of easy generation of stray light in the middle of the optical lens in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an optical lens, comprising: a lens group having seven lenses with optical powers, and the lens group sequentially includes a first lens to a seventh lens from the object side to the image side of the optical lens. The first lens has a positive optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has a positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fourth lens has a negative optical power, the object side surface of the fourth lens is concave. The fifth lens has a negative optical power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has a positive optical power, the object side surface of the sixth lens is convex. The seventh lens has a negative optical power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; a spacer group at least including a second spacer disposed between the second lens and the third lens and at least partially contacting the image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and at least partially contacting the image side surface of the third lens; a barrel in which the lens group and the spacer group are both accommodated; wherein, the inner diameter d0m of the image side end surface of the barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10; the spacing distance EP23 between the second spacer and the third spacer in the direction of the optical axis of the optical lens, the maximum thickness CP3 of the third spacer, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.60 ≤ (EP23 + CP3) / T34 < 2.15; the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, and the inner diameter d3s of the object side surface of the third spacer satisfy: -12.40 < (R6 + R7) / d3s < -10.60.

[0005] According to another aspect of the present invention, an optical lens is provided, comprising: a lens group having seven lenses with optical powers, and the lens group sequentially includes a first lens to a seventh lens from the object side to the image side of the optical lens. The first lens has a positive optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has a positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fourth lens has a negative optical power, the object side surface of the fourth lens is concave. The fifth lens has a negative optical power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has a positive optical power, the object side surface of the sixth lens is convex, and the seventh lens has a negative optical power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave; a spacer group including at least a second spacer disposed between the second lens and the third lens and at least partially contacting the image side surface of the second lens, a third spacer disposed between the third lens and the fourth lens and at least partially contacting the image side surface of the third lens, a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens; a barrel, wherein the lens group and the spacer group are both accommodated in the barrel; wherein, the inner diameter d0m of the image side end surface of the barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10; the spacing distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction, the central thickness CT6 of the sixth lens, and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.85 < EP56 / (CT6 + T56) < 1.20; the inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d6s of the object side surface of the sixth spacer, and the spacing distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction satisfy: 2.45 ≤ (d6s - d5s) / EP56 < 3.05.

[0006] Further, the inner diameter d0s of the object side end surface of the barrel and the entrance pupil diameter EPD of the optical lens satisfy: 1.50 < d0s / EPD < 2.05.

[0007] Further, the spacer group further includes a first spacer disposed between the first lens and the second lens and at least partially in contact with the image side surface of the first lens, and a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, and the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction satisfy: 2.25 < (EP12 + EP34) / EP23 ≤ 3.90.

[0008] Further, the spacer group further includes a first spacer disposed between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D1s of the object side surface of the first spacer, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer in the optical axis direction satisfy: 1.15 < (D0s - D1s) / EP01 < 2.45.

[0009] Further, the spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the air gap T34 between the third lens and the fourth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.70 < EP34 / (T34 + T45) ≤ 1.10.

[0010] Further, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d6s of the object side surface of the sixth spacer, and the spacing distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction satisfy: 2.45 ≤ (d6s - d5s) / EP56 < 3.05.

[0011] Further, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The spacing distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction, the central thickness CT6 of the sixth lens, and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.85 < EP56 / (CT6 + T56) < 1.20.

[0012] Furthermore, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. The outer diameter D6s of the object side surface of the sixth spacer and the outer diameter D5m of the image side surface of the fifth spacer satisfy: 1.15 ≤ D6s / D5m < 1.30.

[0013] Furthermore, the sum ∑CP5 of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens, the sum ∑CP6 of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens, and the central thickness CT6 of the sixth lens satisfy: 1.15 < (∑CP5 + ∑CP6) / CT6 < 1.70.

[0014] Furthermore, the spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens, and a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens. The inner diameter d5m of the image side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the air gap T45 on the optical axis between the fourth lens and the fifth lens, and the central thickness CT5 of the fifth lens satisfy: 1.70 < (d5m - d4m) / (T45 + CT5) < 2.60.

[0015] Furthermore, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. The sum ∑CP5 of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens, the sum ∑CP6 of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens, and the spacer distance EP56 between the fifth spacer and the sixth spacer in the direction of the optical axis satisfy: 0.80 < (∑CP5 + ∑CP6) / EP56 < 1.25.

[0016] Further, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, a fifth auxiliary spacer disposed between the fifth spacer and the sixth lens and at least partially contacting the image side surface of the fifth spacer, a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens, and a sixth auxiliary spacer disposed between the sixth spacer and the seventh lens and at least partially contacting the image side surface of the sixth spacer. The following relationships are satisfied among the effective focal length f6 of the sixth lens, the inner diameter d6bm of the image side surface of the sixth auxiliary spacer, and the inner diameter d6s of the object side surface of the sixth spacer: 2.35 < f6 / (d6bm - d6s) ≤ 2.90. The following relationships are satisfied among the effective focal length f5 of the fifth lens, the inner diameter d5bm of the image side surface of the fifth auxiliary spacer, and the inner diameter d5s of the object side surface of the fifth spacer: -13.80 < f5 / (d5bm - d5s) < -6.30.

[0017] Further, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, a fifth auxiliary spacer disposed between the fifth spacer and the sixth lens and at least partially contacting the image side surface of the fifth spacer, a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens, and a sixth auxiliary spacer disposed between the sixth spacer and the seventh lens and at least partially contacting the image side surface of the sixth spacer. The following relationships are satisfied among the inner diameter d5bm of the image side surface of the fifth auxiliary spacer, the inner diameter d5m of the image side surface of the fifth spacer, and the sum ∑CP5 of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens: 3.95 < (d5bm - d5m) / ∑CP5 < 5.40. The following relationships are satisfied among the inner diameter d6bm of the image side surface of the sixth auxiliary spacer, the inner diameter d6m of the image side surface of the sixth spacer, and the sum ∑CP6 of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens: 2.35 < (d6bm - d6m) / ∑CP6 < 3.65.

[0018] Applying the technical solution of the present invention, the optical lens includes a lens group, a spacer group, and a lens barrel. The number of lenses with optical power in the lens group is seven. Along the object side to the image side of the optical lens, the lens group sequentially includes a first lens to a seventh lens. The first lens has a positive optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has a positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fourth lens has a negative optical power, the object side surface of the fourth lens is concave. The fifth lens has a negative optical power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has a positive optical power, the object side surface of the sixth lens is convex. The seventh lens has a negative optical power, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. The spacer group includes at least a second spacer disposed between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens. The lens group and the spacer group are both accommodated in the lens barrel. Wherein, the inner diameter d0m of the image side end surface of the lens barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10; the spacing distance EP23 of the second spacer and the third spacer in the direction of the optical axis of the optical lens, the maximum thickness CP3 of the third spacer, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.60 ≤ (EP23 + CP3) / T34 < 2.15; the curvature radius R6 of the image side surface of the third lens, the curvature radius R7 of the object side surface of the fourth lens, and the inner diameter d3s of the object side surface of the third spacer satisfy: -12.40 < (R6 + R7) / d3s < -10.60.

[0019] When the seven-piece, large image surface, and ultra-thin optical imaging lens of the present application is configured with the above optical power and surface type and satisfies the conditional expressions 1.90 < d0m / f < 2.10 and 1.60 ≤ (EP23 + CP3) / T34 < 2.15, in order to satisfy the sufficient size of the imaging surface, the third lens has a positive optical power to focus light. Due to the increase in the reflection intensity of the focused light, the mechanical part of the third lens and the thickness of the third spacer satisfy the above range, and stray light is likely to be generated at the third lens. By restricting the curvature radii of the image side surface of the third lens and the object side surface of the fourth lens and the inner diameter size of the third spacer, and by controlling the divergence angle of the marginal light by the curvature radius of the lens center, the deflection angle of the light can be controlled. Furthermore, combined with the inner diameter size of the third spacer element, the arc-shaped stray light generated by the multiple reflection phenomenon of the light on the inner diameter surface of the third spacer can be effectively reduced, and the third spacer intercepts the ineffective marginal light from entering the mechanical part of the fourth lens, thereby effectively reducing the intensity of the stray light energy and improving the imaging cleanliness. Description of the Drawings

[0020] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A partial parameter schematic diagram of an optical lens according to any optional embodiment of the present invention is shown;

[0022] Figure 2 A schematic structural diagram of the optical lens according to Embodiment 1 of the present invention is shown;

[0023] Figure 3 An axial chromatic aberration curve of the optical lens according to Embodiment 1 of the present invention is shown;

[0024] Figure 4 An astigmatism curve of the optical lens according to Embodiment 1 of the present invention is shown;

[0025] Figure 5 A schematic structural diagram of the optical lens according to Embodiment 2 of the present invention is shown;

[0026] Figure 6 A schematic structural diagram of the optical lens according to Embodiment 3 of the present invention is shown;

[0027] Figure 7 An axial chromatic aberration curve of the optical lens according to Embodiment 3 of the present invention is shown;

[0028] Figure 8 An astigmatism curve of the optical lens according to Embodiment 3 of the present invention is shown;

[0029] Figure 9 A schematic structural diagram of the optical lens according to Embodiment 4 of the present invention is shown;

[0030] Figure 10 A schematic structural diagram of the optical lens according to Embodiment 5 of the present invention is shown;

[0031] Figure 11 An axial chromatic aberration curve of the optical lens according to Embodiment 5 of the present invention is shown;

[0032] Figure 12 An astigmatism curve of the optical lens according to Embodiment 5 of the present invention is shown;

[0033] Figure 13 A schematic structural diagram of the optical lens according to Embodiment 6 of the present invention is shown;

[0034] Figure 14 A schematic structural diagram of the optical lens according to Embodiment 7 of the present invention is shown;

[0035] Figure 15Shows the axial chromatic aberration curve of the optical lens according to the seventh embodiment of the present invention;

[0036] Figure 16 Shows the astigmatism curve of the optical lens according to the seventh embodiment of the present invention;

[0037] Figure 17 Shows the structural schematic diagram of the optical lens according to the eighth embodiment of the present invention;

[0038] Figure 18 [[ID=I2]]Shows the stray light optical path diagram of a lens 3 of the present invention under the conditions of d0m / f = 2.05, (EP23 + CP3) / T34 = 1.75, and (R6 + R7) / d3s = -11.50;

[0039] Figure 19 Shows Figure 18 The schematic diagram of the stray light spot of the lens 3 in;

[0040] Figure 20 Shows the stray light optical path diagram of lens 1 under the conditions of d0m / f = 2.05, (EP23 + CP3) / T34 = 1.75, and (R6 + R7) / d3s = -13.05;

[0041] Figure 21 Shows Figure 20 The schematic diagram of the stray light spot of the lens 1 in;

[0042] Figure 22 Shows the stray light optical path diagram of lens 2 under the conditions of d0m / f = 2.05, (EP23 + CP3) / T34 = 1.75, and (R6 + R7) / d3s = -8.85;

[0043] Figure 23 Shows Figure 22 The schematic diagram of the stray light spot of the lens in;

[0044] Among them, the above-mentioned drawings include the following reference numerals:

[0045] P0, lens barrel; E1, first lens; S1, object side of the first lens; S2, image side of the first lens; P1, first spacer; E2, second lens; S3, object side of the second lens; S4, image side of the second lens; P2, second spacer;

[0046] E3, third lens; S5, object side of the third lens; S6, image side of the third lens; P3, third spacer; E4, fourth lens; S7, object side of the fourth lens; S8, image side of the fourth lens; P4, fourth spacer; E5, fifth lens;

[0047] S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; P5, fifth spacer; P5b, fifth auxiliary spacer; E6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; P6, sixth spacer; P6b, sixth auxiliary spacer; E7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens. Detailed implementation mode

[0048] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0049] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0050] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the directions shown in the drawings, or in reference to the component itself in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present invention.

[0051] It should be noted that in this specification, the expressions of the first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teachings of this application, the first lens discussed below can also be referred to as the second lens or the third lens.

[0052] In the drawings, for the convenience of illustration, the thickness, size and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0053] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive and negative values of the R value (the R value refers to the radius of curvature in the paraxial region, usually the R value on the lens database in the optical software). For the object-side surface, when the R value is positive, it is judged as convex, and when the R value is negative, it is judged as concave; for the image-side surface, when the R value is positive, it is judged as concave, and when the R value is negative, it is judged as convex.

[0054] In this text, effective rays refer to those rays that can be accurately focused on the imaging surface directly or after refraction inside the optical lens. These rays follow the optical laws, such as the law of refraction and the law of reflection, when passing through the optical lens, and finally form a clear image on the imaging surface.

[0055] In this text, ineffective rays refer to those rays that do not participate in the imaging process. This includes those rays that enter the optical lens but do not focus on the imaging surface, or are scattered, reflected, or absorbed inside the optical lens. Ineffective rays can be caused by physical limitations in the design of the optical lens (such as an asymmetric or imperfect lens shape), or may be caused by factors such as unevenness, dust, scratches, or uneven coating on the surface of the optical element. Ineffective rays not only cannot improve the image quality, but may also cause image blurring, reduced contrast, or produce adverse effects such as spots and glare.

[0056] In this text, each lens is composed of an effective diameter part and a mechanism part formed integrally. The mechanism part is annular and connected to the outer peripheral side of the effective diameter part. The effective diameter part is used for the passage of light and participates in imaging; while the mechanism part is not used for the passage of light, does not participate in imaging, and is used to contact the adjacent spacer, adjacent lens, or lens barrel.

[0057] The main purpose of the present invention is to provide an optical lens to solve the problem of easy generation of stray light in the middle of the optical lens in the prior art.

[0058] The first embodiment

[0059] Such as Figures 1 to 19As shown, the optical lens includes a lens group, a spacer group, and a lens barrel. The number of lenses with optical power in the lens group is seven. Along the object side to the image side of the optical lens, the lens group sequentially includes a first lens to a seventh lens. The first lens has a positive optical power. The object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative optical power. The object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has a positive optical power. The object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fourth lens has a negative optical power. The object side surface of the fourth lens is concave. The fifth lens has a negative optical power. The object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has a positive optical power. The object side surface of the sixth lens is convex. The seventh lens has a negative optical power. The object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. The spacer group includes at least a second spacer disposed between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens. Both the lens group and the spacer group are accommodated in the lens barrel. Among them, the inner diameter d0m of the image side end surface of the lens barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10; the spacing distance EP23 of the second spacer and the third spacer in the direction of the optical axis of the optical lens, the maximum thickness CP3 of the third spacer, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.60 ≤ (EP23 + CP3) / T34 < 2.15; the curvature radius R6 of the image side surface of the third lens, the curvature radius R7 of the object side surface of the fourth lens, and the inner diameter d3s of the object side surface of the third spacer satisfy: -12.40 < (R6 + R7) / d3s < -10.60.

[0060] When the seven-piece, large image plane, and ultra-thin optical imaging lens of the present application is configured with the above optical power and surface type and satisfies the conditional expressions 1.90 < d0m / f < 2.10 and 1.60 ≤ (EP23 + CP3) / T34 < 2.15, in order to meet the sufficient size of the imaging plane, the third lens has a positive optical power to focus light. Due to the increase in the reflection intensity caused by the focused light, the mechanical part of the third lens and the thickness of the third spacer satisfy the above range, and stray light is likely to be generated at the third lens. By restricting the curvature radii of the image side surface of the third lens and the object side surface of the fourth lens and the inner diameter size of the third spacer, and by controlling the divergence angle of the marginal light by affecting the central curvature radius of the lens, the deflection angle of the light can be controlled. Furthermore, combined with the inner diameter size of the third spacer element, the arc-shaped stray light generated by the multiple reflection phenomenon of the light on the inner diameter surface of the third spacer can be effectively reduced, and the third spacer intercepts the ineffective marginal light from entering the mechanical part of the fourth lens, thereby effectively reducing the intensity of the stray light energy and improving the imaging cleanliness.

[0061] Table 1 below shows the stray light conditions of Lens 1, Lens 2, and an optional Lens 3 of the present application when d0m / f = 2.05, (EP23 + CP3) / T34 = 1.75, and (R6 + R7) / d3s take different values. In addition, the stray light optical path diagrams and stray light spot diagrams of Lens 1, Lens 2, and Lens 3 are given to visually compare the stray light distribution.

[0062] Table 1

[0063]

[0064] As shown in Table 1, Figure 20 and Figure 21 shown, when Lens 1 satisfies the condition of (R6 + R7) / d3s = -13.05, the converging degree of the third lens to light is insufficient, and the inclination angle of the light exiting from the image side of the third lens is relatively large, resulting in a relatively high risk of its incidence on the inner diameter surface of the third spacer. At the same time, the risk of the light entering the fourth lens being incident on the mechanism part is also relatively high, and the stray light energy intensity is relatively large. As Figure 22 and Figure 23 shown, when Lens 2 satisfies the condition of (R6 + R7) / d3s = -8.85, the inner diameter of the third spacer is relatively large. It is not only difficult to intercept ineffective light, but also the risk of the inner diameter surface of the third spacer reflecting light is relatively high, resulting in an increase in arc-shaped stray light, and the stray light energy is also relatively strong. And Lens 3 of the present application, as Figure 18 and Figure 19 shown, satisfies (R6 + R7) / d3s = -11.50, that is, (R6 + R7) / d3s is in the range of -12.40 to -10.65. While controlling the light deflection angle and reducing the generation of stray light, the third spacer is used to intercept stray light, effectively reducing the stray light energy intensity.

[0065] In this embodiment, the inner diameter d0s of the object-side end face of the lens barrel and the entrance pupil diameter EPD of the optical lens satisfy: 1.50 < d0s / EPD < 2.05. By limiting d0s / EPD within a reasonable range, the generation of excessive stray light of the incident light in the mechanism part of the first lens can be effectively reduced, preventing the blocking of effective light imaging, and improving the imaging quality of the optical lens.

[0066] In this embodiment, the spacer group further includes a first spacer disposed between the first lens and the second lens and at least partially contacting the image side surface of the first lens, and a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens. The spacing distance EP12 between the first spacer and the second spacer in the optical axis direction, the spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, and the spacing distance EP23 between the second spacer and the third spacer in the optical axis direction satisfy: 2.25 < (EP12 + EP34) / EP23 ≤ 3.90. By restricting (EP12 + EP34) / EP23 within a reasonable range, while ensuring that effective light rays pass through the lens smoothly, the ratio of the partial thickness to the center thickness of the lens mechanism can be controlled, preventing the phenomenon of excessive air gaps between adjacent two lenses, making the area of the lens and the spacer more concentrated, and improving the stability of the assembly process.

[0067] In this embodiment, the spacer group further includes a first spacer disposed between the first lens and the second lens and at least partially contacting the image side surface of the first lens. The outer diameter D0s of the object side end surface of the lens barrel, the outer diameter D1s of the object side surface of the first spacer, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer in the optical axis direction satisfy: 1.15 < (D0s - D1s) / EP01 < 2.45. By restricting (D0s - D1s) / EP01 within a reasonable range, the thickness of the head of the lens barrel can be controlled to be more uniform, the assembly stability of the lens can be improved, and further the assembly stability and imaging performance of the optical lens can be enhanced.

[0068] In this embodiment, the spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens. The spacing distance EP34 between the third spacer and the fourth spacer in the optical axis direction, the air gap T34 between the third lens and the fourth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.70 < EP34 / (T34 + T45) ≤ 1.10. By restricting EP34 / (T34 + T45) within a reasonable range, it is ensured that the sum of the air gaps between the third, fourth, and fifth lenses on the optical axis and the thickness of the fourth lens mechanism part are within a reasonable range, which is beneficial to the later adjustment of the MTF performance. At the same time, the reasonable thickness ratio of the fourth lens can effectively reduce the molding difficulty of the fourth lens and improve the assembly stability.

[0069] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. The inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d6s of the object side surface of the sixth spacer, and the spacer distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction satisfy: 2.45 ≤ (d6s - d5s) / EP56 < 3.05. By limiting (d6s - d5s) / EP56 within a reasonable range, the shape of the sixth lens can be constrained. The inner diameters of the fifth spacer and the sixth spacer can effectively block the marginal stray light generated by the fifth lens and the sixth lens, ensuring that the stray light does not enter the subsequent optical path, and at the same time reducing the risk of stray light generated by reflection on the inner diameter surface of the spacer.

[0070] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens, the spacer distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction. The central thickness CT6 of the sixth lens and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.85 < EP56 / (CT6 + T56) < 1.20. By limiting EP56 / (CT6 + T56) within a reasonable range, the air gap between the fifth lens and the sixth lens can be effectively controlled within a reasonable range, thereby improving the assembly stability, and at the same time helping to intercept the excess stray light between the fifth lens and the sixth lens, improving the imaging cleanliness of the optical lens.

[0071] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. The outer diameter D6s of the object side surface of the sixth spacer and the outer diameter D5m of the image side surface of the fifth spacer satisfy: 1.15 ≤ D6s / D5m < 1.30. By limiting D6s / D5m within a reasonable range, the size of the step difference from the fifth lens to the sixth lens can be effectively controlled, reducing the risk during the assembly process, improving the assembly stability of the fifth lens and the sixth lens, and thus improving the performance of the optical lens.

[0072] In this embodiment, the sum of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens, ∑CP5, the sum of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens, ∑CP6, and the central thickness CT6 of the sixth lens satisfy: 1.15 < (∑CP5 + ∑CP6) / CT6 < 1.70. By restricting (∑CP5 + ∑CP6) / CT6 within a reasonable range, the ratio of the central thickness of the sixth lens to the thickness of the mechanism part of the sixth lens, as well as the curvature of the transition region between the effective diameter part and the mechanism part of the sixth lens, can be constrained, reducing the forming difficulty of the sixth lens and the risk of generating extra light in the transition region.

[0073] In this embodiment, the spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens, and a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens. The inner diameter d5m of the image side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, and the air gap T45 between the fourth lens and the fifth lens on the optical axis and the central thickness CT5 of the fifth lens satisfy: 1.70 < (d5m - d4m) / (T45 + CT5) < 2.60. By restricting (d5m - d4m) / (T45 + CT5) within a reasonable range, the refractive power of the fourth lens and the fifth lens on light can be maintained within a suitable range, which is beneficial to controlling the center thickness, the thickness of the mechanism part, and the forming difficulty of the fourth lens and the fifth lens. At the same time, the angular deviation of light incident on the fourth lens and the fifth lens can be reduced, avoiding the generation of stray light.

[0074] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The sum of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens, ∑CP5, the sum of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens, ∑CP6, and the spacing distance EP56 between the fifth spacer and the sixth spacer in the direction of the optical axis satisfy: 0.80 < (∑CP5 + ∑CP6) / EP56 < 1.25. By restricting (∑CP5 + ∑CP6) / EP56 within a reasonable range, the curvature of the transition from the effective diameter region to the mechanism region on both sides of the sixth lens can be effectively controlled, which is beneficial to controlling the thickness of the mechanism part of the sixth lens. At the same time, by controlling the thickness of the spacers, it is beneficial to adjust the air gaps between the fifth, sixth, and seventh lenses, improving the space for reducing stray light.

[0075] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, a fifth auxiliary spacer disposed between the fifth spacer and the sixth lens and at least partially contacting the image side surface of the fifth spacer, a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens, and a sixth auxiliary spacer disposed between the sixth spacer and the seventh lens and at least partially contacting the image side surface of the sixth spacer. The following conditions are satisfied among the effective focal length f6 of the sixth lens, the inner diameter d6bm of the image side surface of the sixth auxiliary spacer, and the inner diameter d6s of the object side surface of the sixth spacer: 2.35 < f6 / (d6bm - d6s) ≤ 2.90. The following conditions are satisfied among the effective focal length f5 of the fifth lens, the inner diameter d5bm of the image side surface of the fifth auxiliary spacer, and the inner diameter d5s of the object side surface of the fifth spacer: -13.80 < f5 / (d5bm - d5s) < -6.30. By restricting f6 / (d6bm - d6s) and f5 / (d5bm - d5s) within reasonable ranges, the inner diameter dimensions of the spacers between the fifth lens and the seventh lens can be controlled, thereby constraining the refraction angle of the light rays and the aperture size of the effective light rays. While the spacer intercepts the ineffective light rays at the edge, it does not intercept the effective light rays.

[0076] In this embodiment, the spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, a fifth auxiliary spacer disposed between the fifth spacer and the sixth lens and at least partially contacting the image side surface of the fifth spacer, a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens, and a sixth auxiliary spacer disposed between the sixth spacer and the seventh lens and at least partially contacting the image side surface of the sixth spacer. The following conditions are satisfied among the inner diameter d5bm of the image side surface of the fifth auxiliary spacer, the inner diameter d5m of the image side surface of the fifth spacer, and the sum ∑CP5 of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens: 3.95 < (d5bm - d5m) / ∑CP5 < 5.40. The following conditions are satisfied among the inner diameter d6bm of the image side surface of the sixth auxiliary spacer, the inner diameter d6m of the image side surface of the sixth spacer, and the sum ∑CP6 of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens: 2.35 < (d6bm - d6m) / ∑CP6 < 3.65. By restricting (d5bm - d5m) / ∑CP5 and (d6bm - d6m) / ∑CP6 within reasonable ranges, the thicknesses of the mechanism parts of the fifth lens and the sixth lens are effectively controlled by the thickness of the spacers, thereby ensuring that the ratio of the center thickness of the lens to the thickness of the mechanism part is within a reasonable range, and reducing the risks of assembly misalignment, lens breakage, etc. during the assembly of the optical lens due to reasons such as the thickness of the mechanism part and the center thickness of the lens being too thin and the gap between adjacent lenses being too large. At the same time, reasonably setting the inner diameter of the spacer is beneficial to reducing the risk of generating stray light.

[0077] Second Embodiment

[0078] As Figures 1 to 19 shown, the optical lens includes a lens group, a spacer group, and a lens barrel. The number of lenses with optical power in the lens group is seven. Along the object side to the image side of the optical lens, the lens group sequentially includes a first lens to a seventh lens. The first lens has a positive optical power. The object side surface of the first lens is convex, and the image side surface of the first lens is concave. The second lens has a negative optical power. The object side surface of the second lens is convex, and the image side surface of the second lens is concave. The third lens has a positive optical power. The object side surface of the third lens is convex, and the image side surface of the third lens is convex. The fourth lens has a negative optical power. The object side surface of the fourth lens is concave. The fifth lens has a negative optical power. The object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The sixth lens has a positive optical power. The object side surface of the sixth lens is convex. The seventh lens has a negative optical power. The object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. The spacer group at least includes a second spacer placed between the second lens and the third lens and at least partially contacting the image side surface of the second lens, a third spacer placed between the third lens and the fourth lens and at least partially contacting the image side surface of the third lens, a fifth spacer placed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer placed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. Both the lens group and the spacer group are accommodated in the lens barrel. Among them, the inner diameter d0m of the image side end surface of the lens barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10. The interval distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction, the central thickness CT6 of the sixth lens, and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.85 < EP56 / (CT6 + T56) < 1.20. The inner diameter d5s of the object side surface of the fifth spacer, the inner diameter d6s of the object side surface of the sixth spacer, and the interval distance EP56 between the fifth spacer and the sixth spacer in the optical axis direction satisfy: 2.45 ≤ (d6s - d5s) / EP56 < 3.05.

[0079] When the seven-piece, large image plane, ultra-thin optical imaging lens of the present application is configured with the above-mentioned optical power and surface shape and satisfies the conditional expressions 1.90 < d0m / f < 2.10 and EP56 / (CT6 + T56), in order to meet the sufficient size of the imaging surface, the sixth lens has a positive optical power to focus light. Due to the aggregation of light, the reflection intensity is increased. When the thickness of the mechanical part of the sixth lens and the third spacer satisfies the above range, stray light is easily generated at the sixth lens. By limiting (d6s - d5s) / EP56 within a reasonable range, the present application can constrain the shape of the sixth lens, and the inner diameters of the fifth spacer and the sixth spacer can effectively block the edge stray light generated by passing through the fifth lens and the sixth lens, ensuring that the stray light does not enter the subsequent optical path, and at the same time reducing the risk of stray light generated by reflection on the inner diameter surface of the spacer.

[0080] It should be noted that in this embodiment, other conditional expressions in the above embodiment may also be included, which will not be elaborated here one by one.

[0081] Optionally, the above optical lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0082] The optical lens in the present application may employ multiple lenses, such as the seven lenses described above. In the present application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0083] However, those skilled in the art should understand that without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although the seven-lens example is described in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may further include other numbers of lenses.

[0084] Figure 1 A schematic diagram of the size marking of an optical lens of the present application is shown. Figure 1 Parameters such as D1s, d6m, and EP56 are marked in it to clearly and intuitively understand the meaning of the parameters. For the convenience of describing the surface shape of the optical lens and specific lenses, these parameters will no longer be shown in the subsequent description of specific embodiments in the drawings.

[0085] The following further describes, with reference to the drawings, examples of the specific surface shape and parameters of the optical lens applicable to the above embodiment.

[0086] It should be noted that any one of the following Embodiment 1 to Embodiment 8 is applicable to all embodiments of the present application.

[0087] Embodiment 1

[0088] As Figure 2 shown, the optical lens of Embodiment 1 of the present application is described. Figure 2 The schematic structural diagram of the optical lens of Embodiment 1 is shown.

[0089] As Figure 2 shown, the optical lens sequentially includes, from the object side to the image side, those accommodated in the lens barrel P0: a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a fifth auxiliary spacer P5b, a sixth lens E6, a sixth spacer P6, a sixth auxiliary spacer P6b, and a seventh lens E7. Among them, the object side surface of the first spacer contacts the image side surface of the first lens, the object side surface of the second spacer contacts the image side surface of the second lens, the object side surface of the third spacer contacts the image side surface of the third lens, the object side surface of the fourth spacer contacts the image side surface of the fourth lens, the object side surface of the fifth spacer contacts the image side surface of the fifth lens, the object side surface of the fifth auxiliary spacer contacts the image side surface of the fifth spacer, the object side surface of the sixth spacer contacts the image side surface of the sixth lens, and the object side surface of the sixth auxiliary spacer contacts the image side surface of the sixth spacer.

[0090] In this embodiment, the first lens E1 has a positive optical power. The object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens E2 has a negative optical power. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens E3 has a positive optical power. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens E4 has a negative optical power. The object side surface S7 of the fourth lens is a concave surface, and the image side surface S8 of the fourth lens is a convex surface. The fifth lens E5 has a negative optical power. The object side surface S9 of the fifth lens is a convex surface, and the image side surface S10 of the fifth lens is a concave surface. The sixth lens E6 has a positive optical power. The object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens E7 has a negative optical power. The object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. The optical lens further includes a filter or a protective glass (not shown in the figure), which has an object side surface S15 (not shown in the figure) and an image side surface S16 (not shown in the figure). The light from the object surface passes through S1 to S16 and reaches the imaging surface S17 (not shown in the figure).

[0091] Table 2 shows the basic structural parameters of the optical lens of the first embodiment, where the units of the radius of curvature, thickness / distance, effective radius, and focal length are all millimeters (mm). OBJ (not shown in the figure) is the object surface, and the aperture stop is located on the first lens.

[0092] Table 2

[0093] Surface number Surface type Radius of curvature Thickness / Distance Refractive index Abbe number Conic coefficient OBJ Spherical surface Infinity 10000 Aperture stop Spherical surface Infinity -0.5456 S1 Aspherical surface 2.3185 0.7700 1.55 56.14 0.0000 S2 Aspherical surface 7.9036 0.1190 -3.4784 S3 Aspherical surface 5.8745 0.2725 1.677 19.24 -11.4173 S4 Aspherical surface 3.9425 0.3850 0.1828 S5 Aspherical surface 44.6200 0.4900 1.55 56.14 0.0000 S6 Aspherical surface -16.7622 0.2197 7.2706 S7 Aspherical surface -14.8425 0.3150 1.68 19.24 0.0000 S8 Aspherical surface -160.3358 0.4200 0.0000 S9 Aspherical surface 58.5755 0.4300 1.57 37.40 99.0000 S10 Aspherical surface 8.0380 0.2300 0.0000 S11 Aspherical surface 2.3724 0.5770 1.55 56.14 -3.9728 S12 Aspherical surface -35.5984 0.6289 0.0000 S13 Aspherical surface 3.4861 0.4250 1.54 55.71 -0.9881 S14 Aspherical surface 1.3405 0.6353 -4.2604 S15 Spherical surface Infinity 0.2100 1.52 64.17 S16 Spherical surface Infinity 0.4427 S17 Spherical surface Infinity

[0094] In the first embodiment, each lens is an aspherical lens, and the aspherical surface profile can be defined by, but not limited to, the following aspherical formula:

[0095]

[0096] where x is the sagitta, the distance from the vertex of the aspherical surface to the aspherical surface along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 2 above; k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A24, A26, A28, A30 that can be used for each aspherical mirror surface S1 - S14 in the first embodiment.

[0097] Table 3

[0098] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -1.9E-03 2.5E-02 -1.3E-01 4.5E-01 -1.1E+00 1.8E+00 -2.1E+00 S2 -2.7E-02 1.7E-02 1.8E-02 -1.2E-01 3.5E-01 -6.6E-01 8.7E-01 S3 -4.6E-02 5.1E-02 -1.5E-01 6.9E-01 -2.1E+00 4.5E+00 -6.6E+00 S4 -2.7E-02 -4.3E-02 6.2E-01 -3.7E+00 1.4E+01 -3.8E+01 7.2E+01 S5 -3.1E-02 1.2E-01 -1.1E+00 5.7E+00 -2.0E+01 4.9E+01 -8.5E+01 S6 -2.9E-02 -5.3E-02 3.3E-01 -1.5E+00 4.2E+00 -8.2E+00 1.1E+01 S7 -7.0E-02 1.0E-01 -6.4E-01 2.4E+00 -6.3E+00 1.2E+01 -1.6E+01 S8 -5.2E-02 3.2E-02 -8.6E-02 1.5E-01 -2.2E-01 2.6E-01 -2.5E-01 S9 -8.4E-02 8.2E-02 -4.8E-02 -2.5E-02 9.8E-02 -1.3E-01 1.0E-01 S10 -1.7E-01 6.4E-02 2.7E-02 -9.1E-02 1.1E-01 -9.3E-02 5.3E-02 S11 1.3E-02 -3.5E-02 3.0E-02 -2.7E-02 1.7E-02 -7.6E-03 2.4E-03 S12 1.1E-01 -2.6E-02 -3.1E-02 3.1E-02 -1.5E-02 4.7E-03 -1.0E-03 S13 -2.3E-01 1.3E-01 -6.4E-02 2.7E-02 -8.3E-03 1.8E-03 -2.7E-04 S14 -1.3E-01 8.2E-02 -4.2E-02 1.6E-02 -4.3E-03 8.5E-04 -1.2E-04 Surface number A18 A20 A22 A24 A26 A28 A30 S1 1.9E+00 -1.2E+00 5.6E-01 -1.8E-01 3.9E-02 -5.0E-03 2.9E-04 S2 -8.0E-01 5.2E-01 -2.4E-01 7.2E-02 -1.4E-02 1.6E-03 -7.3E-05 S3 6.9E+00 -5.2E+00 2.7E+00 -1.0E+00 2.4E-01 -3.4E-02 2.1E-03 S4 -9.7E+01 9.4E+01 -6.5E+01 3.2E+01 -1.0E+01 1.9E+00 -1.6E-01 S5 1.1E+02 -9.8E+01 6.4E+01 -2.9E+01 8.7E+00 -1.6E+00 1.3E-01 S6 -1.1E+01 8.2E+00 -4.3E+00 1.6E+00 -3.9E-01 5.7E-02 -3.8E-03 S7 1.6E+01 -1.1E+01 5.6E+00 -2.0E+00 4.8E-01 -6.7E-02 4.2E-03 S8 1.7E-01 -8.4E-02 2.9E-02 -6.6E-03 8.7E-04 -5.2E-05 0.0E+00 S9 -5.7E-02 2.2E-02 -5.9E-03 1.0E-03 -1.2E-04 7.2E-06 -1.8E-07 S10 -2.1E-02 5.9E-03 -1.1E-03 1.5E-04 -1.3E-05 6.3E-07 -1.4E-08 S11 -5.2E-04 8.3E-05 -9.4E-06 7.5E-07 -4.0E-08 1.3E-09 -1.8E-11 S12 1.6E-04 -1.8E-05 1.5E-06 -8.4E-08 3.1E-09 -6.8E-11 6.6E-13 S13 3.0E-05 -2.4E-06 1.4E-07 -5.7E-09 1.6E-10 -2.5E-12 1.8E-14 S14 1.2E-05 -9.1E-07 4.8E-08 -1.8E-09 4.3E-11 -6.0E-13 3.8E-15

[0099] Figure 3 shows the axial chromatic aberration curve of the optical lens of the first embodiment, which represents the deviation of the focus points of light rays with different wavelengths after passing through the optical lens. Figure 4 shows the astigmatism curve of the optical lens of the first embodiment, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0100] According to Figure 3 and Figure 4 it can be seen that the optical lens given in the first embodiment can achieve good imaging quality.

[0101] Second Embodiment

[0102] As Figure 5 shown, the optical lens of the second embodiment of the present application is described. The optical lens of this embodiment has the same optical parameters as those of the first embodiment and the same arrangement of lenses and spacers, but different structural parameters. For relevant descriptions, reference can be made to those in the first embodiment, which will not be elaborated here.

[0103] Third Embodiment

[0104] As Figure 6 shown, the optical lens of the third embodiment of the present application is described. Figure 6The structural schematic diagram of the optical lens of Embodiment 3 is shown. For the sake of simplicity, some descriptions similar to those in Embodiment 1 will be omitted.

[0105] As Figure 6 shown, the optical lens sequentially includes, from the object side to the image side, those accommodated in the lens barrel P0: the first lens E1, the first spacer P1, the second lens E2, the second spacer P2, the third lens E3, the third spacer P3, the fourth lens E4, the fourth spacer P4, the fifth lens E5, the fifth spacer P5, the sixth lens E6, the sixth spacer P6, and the seventh lens E7.

[0106] In this embodiment, the first lens E1 has a positive optical power. The object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has a negative optical power. The object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a negative optical power. The object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a positive optical power. The object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has a negative optical power. The object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has a positive optical power. The object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has a negative optical power. The object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. The optical lens further includes a filter or a protective glass (not shown in the figure), which has an object side surface S15 (not shown in the figure) and an image side surface S16 (not shown in the figure). The light from the object surface passes through S1 to S16 and reaches the imaging surface S17 (not shown in the figure).

[0107] Table 4 shows the basic structural parameters of the optical lens of Embodiment 3. Among them, the units of the radius of curvature, thickness / distance, effective radius, and focal length are all millimeters (mm). OBJ (not shown in the figure) is the object surface, and the aperture stop is located on the first lens.

[0108] Table 4

[0109]

[0110]

[0111] In Embodiment 3, each lens is an aspherical lens. The surface profile of the aspherical surface can be defined by, but not limited to, formula (1) in Embodiment 1. Table 5 gives the higher-order term coefficients that can be used for each aspherical mirror surface S1 - S14 in Embodiment 3.

[0112] Table 5

[0113] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -2.25E-03 2.72E-02 -1.41E-01 4.87E-01 -1.14E+00 1.90E+00 -2.27E+00 S2 -2.38E-02 4.72E-03 7.15E-02 -3.14E-01 8.29E-01 -1.49E+00 1.90E+00 S3 -4.37E-02 4.18E-02 -9.37E-02 3.98E-01 -1.18E+00 2.38E+00 -3.32E+00 S4 -2.76E-02 -2.29E-02 4.40E-01 -2.66E+00 1.04E+01 -2.79E+01 5.27E+01 S5 -3.38E-02 1.46E-01 -1.25E+00 6.46E+00 -2.25E+01 5.48E+01 -9.52E+01 S6 -3.21E-02 -4.80E-02 3.23E-01 -1.48E+00 4.24E+00 -8.27E+00 1.14E+01 S7 -6.78E-02 8.68E-02 -4.97E-01 1.77E+00 -4.49E+00 8.24E+00 -1.10E+01 S8 -5.17E-02 3.72E-02 -9.47E-02 1.64E-01 -2.46E-01 3.16E-01 -3.19E-01 S9 -8.58E-02 8.32E-02 -5.02E-02 -2.57E-02 1.05E-01 -1.43E-01 1.24E-01 S10 -1.72E-01 6.72E-02 1.85E-02 -7.79E-02 1.00E-01 -8.41E-02 4.93E-02 S11 1.10E-02 -3.01E-02 2.43E-02 -2.31E-02 1.56E-02 -6.95E-03 2.11E-03 S12 9.72E-02 -1.48E-02 -4.23E-02 3.77E-02 -1.74E-02 5.25E-03 -1.11E-03 S13 -2.38E-01 1.38E-01 -7.27E-02 3.16E-02 -9.93E-03 2.20E-03 -3.47E-04 S14 -1.30E-01 8.38E-02 -4.37E-02 1.69E-02 -4.73E-03 9.51E-04 -1.39E-04 Surface number A18 A20 A22 A24 A26 A28 A30 S1 1.97E+00 -1.25E+00 5.69E-01 -1.82E-01 3.86E-02 -4.89E-03 2.79E-04 S2 -1.72E+00 1.12E+00 -5.15E-01 1.64E-01 -3.42E-02 4.20E-03 -2.29E-04 S3 3.29E+00 -2.33E+00 1.16E+00 -3.93E-01 8.62E-02 -1.08E-02 5.81E-04 S4 -7.16E+01 6.99E+01 -4.88E+01 2.37E+01 -7.59E+00 1.44E+00 -1.24E-01 S5 1.20E+02 -1.09E+02 7.08E+01 -3.21E+01 9.64E+00 -1.72E+00 1.38E-01 S6 -1.14E+01 8.22E+00 -4.27E+00 1.55E+00 -3.76E-01 5.44E-02 -3.57E-03 S7 1.06E+01 -7.50E+00 3.81E+00 -1.35E+00 3.19E-01 -4.47E-02 2.82E-03 S8 2.41E-01 -1.32E-01 5.13E-02 -1.37E-02 2.38E-03 -2.38E-04 1.03E-05 S9 -7.37E-02 3.08E-02 -9.00E-03 1.80E-03 -2.33E-04 1.76E-05 -5.85E-07 S10 -2.05E-02 6.02E-03 -1.24E-03 1.75E-04 -1.60E-05 8.58E-07 -2.05E-08 S11 -4.45E-04 6.64E-05 -6.99E-06 5.10E-07 -2.47E-08 7.12E-10 -9.29E-12 S12 1.68E-04 -1.83E-05 1.41E-06 -7.46E-08 2.53E-09 -4.83E-11 3.79E-13 S13 3.98E-05 -3.31E-06 1.99E-07 -8.37E-09 2.35E-10 -3.96E-12 3.03E-14 S14 1.47E-05 -1.13E-06 6.29E-08 -2.44E-09 6.29E-11 -9.69E-13 6.74E-15

[0114] Figure 7 The axial chromatic aberration curve of the optical lens of Embodiment 3 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical lens. Figure 8 The astigmatism curve of the optical lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0115] According to Figure 7 and Figure 8 it can be known that the optical lens given in Embodiment 3 can achieve good imaging quality.

[0116] Embodiment 4

[0117] As Figure 9 shown, the optical lens of Embodiment 4 of the present application is described. The optical lens of this embodiment has the same optical parameters as those of Embodiment 3 and the same arrangement of lenses and spacers, but different structural parameters. For the relevant description, reference can be made to that in Embodiment 3, which will not be elaborated here.

[0118] Embodiment 5

[0119] As Figure 10 shown, the optical lens of Embodiment 5 of the present application is described. Figure 10 The structural schematic diagram of the optical lens of Embodiment 5 is shown. For the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0120] As Figure 10 shown, the optical lens sequentially includes, from the object side to the image side, those accommodated in the lens barrel P0: the first lens E1, the first spacer P1, the second lens E2, the second spacer P2, the third lens E3, the third spacer P3, the fourth lens E4, the fourth spacer P4, the fifth lens E5, the fifth spacer P5, the sixth lens E6, the sixth spacer P6, and the seventh lens E7.

[0121] In this embodiment, the first lens E1 has a positive optical power. The object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has a negative optical power. The object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a negative optical power. The object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a positive optical power. The object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has a negative optical power. The object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has a positive optical power. The object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has a negative optical power. The object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. The optical lens further includes a filter or a protective glass (not shown in the figure), which has an object side surface S15 (not shown in the figure) and an image side surface S16 (not shown in the figure). The light rays from the object surface pass through S1 to S16 and reach the imaging surface S17 (not shown in the figure).

[0122] Table 6 shows the basic structural parameters of the optical lens of Embodiment 5, where the units of the radius of curvature, thickness / distance, effective radius, and focal length are all millimeters (mm). OBJ (not shown in the figure) is the object surface, and the aperture stop is located on the first lens.

[0123] Table 6

[0124]

[0125]

[0126] In Embodiment 5, each lens is an aspherical lens, and the surface shape of the aspherical surface can be defined by, but not limited to, Formula (1) in Embodiment 1. Table 7 gives the higher-order term coefficients that can be used for each aspherical mirror surface S1 - S14 in Embodiment 5.

[0127] Table 7

[0128] Surface number A4 A6 A8 A10 A12 A14 A16 S1 3.79E-03 -2.98E-02 1.57E-01 -4.95E-01 1.00E+00 -1.37E+00 1.31E+00 S2 1.27E-02 4.49E-02 -2.37E-01 6.93E-01 -1.40E+00 2.03E+00 -2.13E+00 S3 5.54E-02 -1.68E-01 7.61E-01 -2.38E+00 5.02E+00 -7.41E+00 7.77E+00 S4 -5.11E-02 7.33E-01 -4.39E+00 1.70E+01 -4.53E+01 8.51E+01 -1.14E+02 S5 2.11E-01 -1.91E+00 1.05E+01 -3.86E+01 9.87E+01 -1.80E+02 2.38E+02 S6 -5.97E-02 3.29E-01 -1.35E+00 3.74E+00 -7.24E+00 1.01E+01 -1.02E+01 S7 7.87E-02 -5.19E-01 2.03E+00 -5.40E+00 1.02E+01 -1.38E+01 1.37E+01 S8 2.58E-02 -7.35E-02 1.68E-01 -3.05E-01 4.24E-01 -4.41E-01 3.36E-01 S9 5.94E-02 -1.35E-02 -7.44E-02 1.63E-01 -1.96E-01 1.59E-01 -9.01E-02 S10 5.24E-02 2.65E-02 -7.26E-02 8.66E-02 -7.02E-02 4.05E-02 -1.67E-02 S11 -3.30E-02 2.14E-02 -1.91E-02 1.35E-02 -6.26E-03 1.95E-03 -4.14E-04 S12 -1.17E-02 -5.12E-02 4.56E-02 -2.13E-02 6.53E-03 -1.40E-03 2.14E-04 S13 1.48E-01 -7.65E-02 3.16E-02 -9.40E-03 1.99E-03 -3.04E-04 3.39E-05 S14 7.70E-02 -3.84E-02 1.43E-02 -3.87E-03 7.62E-04 -1.10E-04 1.15E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -8.90E-01 4.27E-01 -1.42E-01 3.10E-02 -4.02E-03 2.34E-04 -8.90E-01 S2 1.61E+00 -8.72E-01 3.29E-01 -8.19E-02 1.21E-02 -8.04E-04 1.61E+00 S3 -5.83E+00 3.10E+00 -1.14E+00 2.75E-01 -3.91E-02 2.48E-03 -5.83E+00 S4 1.11E+02 -7.62E+01 3.65E+01 -1.16E+01 2.17E+00 -1.84E-01 1.11E+02 S5 -2.27E+02 1.55E+02 -7.38E+01 2.33E+01 -4.37E+00 3.69E-01 -2.27E+02 S6 7.54E+00 -4.03E+00 1.52E+00 -3.85E-01 5.85E-02 -4.05E-03 7.54E+00 S7 -9.86E+00 5.12E+00 -1.86E+00 4.48E-01 -6.44E-02 4.16E-03 -9.86E+00 S8 -1.86E-01 7.30E-02 -1.99E-02 3.53E-03 -3.67E-04 1.68E-05 -1.86E-01 S9 3.64E-02 -1.04E-02 2.03E-03 -2.60E-04 1.96E-05 -6.53E-07 3.64E-02 S10 4.91E-03 -1.01E-03 1.44E-04 -1.33E-05 7.18E-07 -1.72E-08 4.91E-03 S11 6.13E-05 -6.35E-06 4.52E-07 -2.11E-08 5.82E-10 -7.22E-12 6.13E-05 S12 -2.36E-05 1.85E-06 -9.99E-08 3.50E-09 -7.09E-11 6.16E-13 -2.36E-05 S13 -2.76E-06 1.63E-07 -6.78E-09 1.89E-10 -3.18E-12 2.42E-14 -2.76E-06 S14 -8.85E-07 4.89E-08 -1.90E-09 4.89E-11 -7.54E-13 5.25E-15 -8.85E-07

[0129] Figure 11 shows the axial chromatic aberration curve of the optical lens of Embodiment 5, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical lens. Figure 12 shows the astigmatism curve of the optical lens of Embodiment 5, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0130] According to Figure 11 and Figure 12 it can be known that the optical lens given in Embodiment 5 can achieve good imaging quality.

[0131] Example Six

[0132] As Figure 13 shown, an optical lens of Example Six of the present application is described. The optical lens of this example has the same optical parameters as those of Example Five, and the same arrangement of lenses and spacers, but different structural parameters. For relevant descriptions, reference can be made to those in Example Five and will not be elaborated here.

[0133] Example Seven

[0134] As Figure 14 shown, an optical lens of Example Seven of the present application is described. Figure 14 A schematic structural diagram of the optical lens of Example Seven is shown. For the sake of brevity, some descriptions similar to those in Example One will be omitted.

[0135] As Figure 14 shown, the optical lens sequentially includes, from the object side to the image side, those accommodated in the lens barrel P0: the first lens E1, the first spacer P1, the second lens E2, the second spacer P2, the third lens E3, the third spacer P3, the fourth lens E4, the fourth spacer P4, the fifth lens E5, the fifth spacer P5, the sixth lens E6, the sixth spacer P6, and the seventh lens E7.

[0136] In this example, the first lens E1 has a positive optical power. The object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has a negative optical power. The object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has a negative optical power. The object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has a positive optical power. The object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has a positive optical power. The object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has a positive optical power. The object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is convex. The seventh lens E7 has a negative optical power. The object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. The optical lens further includes a filter or a protective glass (not shown in the figure), which has an object side surface S15 (not shown in the figure) and an image side surface S16 (not shown in the figure). The light rays from the object surface pass through S1 to S16 and reach the imaging surface S17 (not shown in the figure).

[0137] Table 8 shows the basic structural parameters of the optical lens of Example Seven, where the units of the radius of curvature, thickness / distance, effective radius, and focal length are all millimeters (mm). OBJ (not shown in the figure) is the object surface, and the aperture stop is located on the first lens.

[0138] Table 8

[0139]

[0140]

[0141] In the seventh embodiment, each lens is an aspherical lens, and the surface profile of the aspherical surface can be defined by, but not limited to, formula (1) in the first embodiment. Table 9 gives the high-order term coefficients of the aspherical surfaces S1-S14 that can be used in the seventh embodiment.

[0142] Table 9

[0143] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -2.67E-03 2.98E-02 -1.63E-01 5.85E-01 -1.44E+00 2.49E+00 -3.11E+00 S2 -3.05E-02 2.68E-02 -4.12E-02 9.93E-02 -1.86E-01 2.35E-01 -2.03E-01 S3 -4.16E-02 4.31E-02 -1.30E-01 5.88E-01 -1.77E+00 3.56E+00 -4.93E+00 S4 -1.85E-02 -7.25E-02 7.86E-01 -4.38E+00 1.60E+01 -4.05E+01 7.25E+01 S5 -3.14E-02 1.94E-01 -1.72E+00 9.04E+00 -3.19E+01 7.84E+01 -1.38E+02 S6 -2.67E-02 -5.20E-02 3.49E-01 -1.71E+00 5.20E+00 -1.06E+01 1.53E+01 S7 -6.31E-02 7.19E-02 -4.29E-01 1.62E+00 -4.48E+00 9.03E+00 -1.32E+01 S8 -5.50E-02 5.58E-02 -1.25E-01 1.88E-01 -2.15E-01 1.93E-01 -1.33E-01 S9 -9.81E-02 1.11E-01 -1.07E-01 6.82E-02 -8.11E-03 -4.40E-02 6.00E-02 S10 -1.93E-01 7.86E-02 7.45E-03 -5.85E-02 7.35E-02 -5.82E-02 3.20E-02 S11 7.50E-03 -3.43E-02 3.88E-02 -3.90E-02 2.66E-02 -1.26E-02 4.28E-03 S12 1.10E-01 -2.17E-02 -3.32E-02 3.06E-02 -1.44E-02 4.49E-03 -9.99E-04 S13 -2.16E-01 1.07E-01 -4.65E-02 1.79E-02 -5.22E-03 1.09E-03 -1.64E-04 S14 -1.30E-01 8.02E-02 -3.97E-02 1.48E-02 -4.08E-03 8.16E-04 -1.19E-04 Surface number A18 A20 A22 A24 A26 A28 A30 S1 2.83E+00 -1.87E+00 8.90E-01 -2.97E-01 6.59E-02 -8.71E-03 5.20E-04 S2 1.20E-01 -4.76E-02 1.15E-02 -8.19E-04 -4.60E-04 1.60E-04 -1.72E-05 S3 4.76E+00 -3.20E+00 1.46E+00 -4.33E-01 7.44E-02 -5.43E-03 -5.19E-05 S4 -9.34E+01 8.66E+01 -5.75E+01 2.65E+01 -8.09E+00 1.47E+00 -1.19E-01 S5 1.75E+02 -1.62E+02 1.07E+02 -4.92E+01 1.50E+01 -2.72E+00 2.22E-01 S6 -1.59E+01 1.19E+01 -6.43E+00 2.45E+00 -6.24E-01 9.60E-02 -6.75E-03 S7 1.39E+01 -1.06E+01 5.75E+00 -2.16E+00 5.35E-01 -7.80E-02 5.07E-03 S8 6.54E-02 -1.97E-02 1.39E-03 1.57E-03 -7.02E-04 1.30E-04 -9.47E-06 S9 -4.36E-02 2.03E-02 -6.32E-03 1.30E-03 -1.68E-04 1.22E-05 -3.77E-07 S10 -1.23E-02 3.33E-03 -6.18E-04 7.66E-05 -5.95E-06 2.56E-07 -4.43E-09 S11 -1.06E-03 1.92E-04 -2.52E-05 2.32E-06 -1.42E-07 5.19E-09 -8.51E-11 S12 1.62E-04 -1.93E-05 1.66E-06 -1.01E-07 4.08E-09 -9.91E-11 1.09E-12 S13 1.78E-05 -1.41E-06 8.03E-08 -3.21E-09 8.53E-11 -1.36E-12 9.77E-15 S14 1.27E-05 -9.87E-07 5.50E-08 -2.14E-09 5.53E-11 -8.51E-13 5.91E-15

[0144] Figure 15 Fig. shows the axial chromatic aberration curve of the optical lens of the seventh embodiment, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical lens. Figure 16 Fig. shows the astigmatism curve of the optical lens of the seventh embodiment, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0145] According to Figure 15 and Figure 16 it can be seen that the optical lens given in the seventh embodiment can achieve good imaging quality.

[0146] Eighth Embodiment

[0147] As Figure 17 shown, the optical lens of the eighth embodiment of the present application is described. The optical lens of this embodiment has the same optical parameters as those of the seventh embodiment, and the same arrangement of lenses and spacers, but different structural parameters. For the relevant description, reference can be made to the seventh embodiment, and details are not repeated here.

[0148] In summary, Embodiments 1 to 8 of the optical lens respectively satisfy the relationships shown in Table 10.

[0149] Table 10

[0150] Conditional expression / Example One Two Three Four Five Six Seven Eight d0m / f 1.98 1.95 2.03 2.08 1.93 2.01 2.00 1.99 (R6 + R7) / d3s -11.14 -11.06 -10.86 -10.64 -10.70 -10.84 -12.37 -12.24 (EP23 + CP3) / T34 1.60 1.72 1.93 1.78 2.13 1.99 1.86 1.98 d0s / EPD 1.78 2.01 1.68 1.52 1.93 1.70 1.79 1.66 (EP12 + EP34) / EP23 2.87 2.67 2.83 3.36 2.28 2.46 3.90 3.07 (D0s - D1s) / EP01 1.59 1.60 1.77 1.16 1.69 2.41 1.85 1.60 EP34 / (T34 + T45) 0.73 0.82 0.75 0.94 0.78 0.83 1.10 0.93 (d6s - d5s) / EP56 2.68 2.72 3.03 3.02 2.90 2.96 2.59 2.45 EP56 / (CT6 + T56) 0.91 0.91 0.88 0.96 0.87 0.90 0.98 1.19 ​ 1.21 1.27 1.20 1.20 1.21 1.27 1.19 1.15 ​ 2.19 1.83 2.56 2.32 1.89 1.71 1.85 2.03 ​ 0.92 1.11 1.04 1.02 1.07 1.24 1.12 0.84 ​ 2.88 2.44 2.68 2.72 2.79 2.90 2.36 2.77 ​ -8.53 -10.38 -7.18 -6.91 -12.71 -13.79 -6.52 -6.33 ​ 3.47 2.56 3.11 3.44 3.61 2.72 2.37 2.42 ​ 4.17 4.39 4.96 3.97 4.81 4.47 5.38 4.85 ​ 1.18 1.41 1.29 1.38 1.38 1.66 1.49 1.35

[0151] Table 11 gives the optical parameters of the optical lenses of Embodiments 1 to 8.

[0152] Table 11

[0153]

[0154]

[0155] Table 12 gives the parameters of the spacers of the optical lenses of Embodiments 1 to 8, with the unit of mm.

[0156] Table 12

[0157] ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6.4000 6.1000 6.7000 6.2000 6.0000 5.6000 5.6680 5.1600 ​ 2.8360 2.8580 2.9500 3.0120 2.9120 2.8740 2.8160 2.8460 ​ 3.5480 3.6760 3.6120 3.7520 3.7740 3.7300 3.7400 3.5000 ​ 4.8780 4.8420 5.0120 4.8620 5.0300 4.9800 4.8640 4.8040 ​ 5.4120 5.2320 5.7400 5.6800 5.3920 5.1920 5.3800 5.3000 ​ 7.4000 7.1840 7.7280 7.6780 7.4000 7.1840 7.7280 7.9580 ​ 6.8480 6.8400 6.9940 7.0180 6.8980 6.9580 6.8160 7.0560 ​ 7.0740 7.1340 7.4140 7.3540 7.0940 7.1340 7.0420 7.3020 ​ 8.9600 9.0980 9.3000 9.2300 8.9600 9.0980 9.2280 9.1480 ​ 5.4000 6.1200 5.1400 4.6400 5.9200 5.2140 5.3800 4.9800 ​ 10.4200 10.2620 10.7600 11.0000 10.2000 10.6400 10.3900 10.3500 ​ 7.9400 7.7000 8.3700 7.4900 7.7000 8.1000 7.6000 6.9400 ​ 0.9660 0.9980 0.9410 1.1160 1.0060 1.0360 1.0460 1.1110 ​ 0.4770 0.4240 0.5220 0.4970 0.4370 0.4070 0.5270 0.4420 ​ 0.3300 0.3560 0.3450 0.3170 0.4080 0.3780 0.2950 0.3150 ​ 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 ​ 0.4700 0.5270 0.4540 0.5680 0.4920 0.5220 0.6240 0.5240 ​ 0.7340 0.7340 0.6540 0.7140 0.6440 0.6690 0.7540 0.9190 ​ 0.3330 0.2710 0.2930 0.3650 0.2930 0.3180 0.2580 0.3030 ​ 0.3450 0.5410 0.3850 0.3650 0.3950 0.5100 0.5900 0.4700 ​ 6.8010 6.4220 7.1920 7.1290 6.8010 6.6120 6.7690 6.7690 ​ 8.2710 8.5200 8.6110 8.6110 8.5200 8.5200 8.4390 8.4390

[0158] The present application also provides an imaging device, and its electronic photosensitive element may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device may be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0159] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0160] It should be noted that the terms used herein are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0161] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects, rather than necessarily for describing a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0162] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical lens, characterized in that, Comprising: A lens group, the number of lenses having a refractive power in the lens group is seven. Along the object side to the image side of the optical lens, the lens group sequentially includes a first lens to a seventh lens. The first lens has a positive refractive power, the object side surface of the first lens is convex, the image side surface of the first lens is concave. The second lens has a negative refractive power, the object side surface of the second lens is convex, the image side surface of the second lens is concave. The third lens has a positive refractive power, the object side surface of the third lens is convex, the image side surface of the third lens is convex. The fourth lens has a negative refractive power, the object side surface of the fourth lens is concave. The fifth lens has a negative refractive power, the object side surface of the fifth lens is convex, the image side surface of the fifth lens is concave. The sixth lens has a positive refractive power, the object side surface of the sixth lens is convex. The seventh lens has a negative refractive power, the object side surface of the seventh lens is convex, the image side surface of the seventh lens is concave; A spacer group, the spacer group at least includes a second spacer placed between the second lens and the third lens and at least partially contacting the image side surface of the second lens, and a third spacer placed between the third lens and the fourth lens and at least partially contacting the image side surface of the third lens; A lens barrel, both the lens group and the spacer group are accommodated in the lens barrel; Wherein, the inner diameter d0m of the image side end face of the lens barrel and the effective focal length f of the optical lens satisfy: 1.90 < d0m / f < 2.10; The interval distance EP23 between the second spacer and the third spacer in the direction of the optical axis of the optical lens, the maximum thickness CP3 of the third spacer, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 1.60 ≤ (EP23 + CP3) / T34 < 2.15; The radius of curvature R6 of the image side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, and the inner diameter d3s of the object side surface of the third spacer satisfy: -12.40 < (R6 + R7) / d3s < -10.

60.

2. The optical lens according to claim 1, wherein The inner diameter d0s of the object side end face of the lens barrel and the entrance pupil diameter EPD of the optical lens satisfy: 1.50 < d0s / EPD < 2.

05.

3. The optical lens according to claim 1, wherein The spacer group further includes a first spacer placed between the first lens and the second lens and at least partially contacting the image side surface of the first lens, and a fourth spacer placed between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens. The interval distance EP12 between the first spacer and the second spacer in the direction of the optical axis, the interval distance EP34 between the third spacer and the fourth spacer in the direction of the optical axis, and the interval distance EP23 between the second spacer and the third spacer in the direction of the optical axis satisfy: 2.25 < (EP12 + EP34) / EP23 ≤ 3.

90.

4. The optical lens according to claim 1, wherein The spacer group further includes a first spacer disposed between the first lens and the second lens and at least partially in contact with the image side surface of the first lens. The outer diameter D0s of the object-side end surface of the lens barrel, the outer diameter D1s of the object-side surface of the first spacer, and the distance EP01 from the object-side end surface of the lens barrel to the object-side surface of the first spacer along the optical axis satisfy: 1.15 < (D0s - D1s) / EP01 < 2.

45.

5. The optical lens according to claim 1, characterized in that, The spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens. The spacing distance EP34 between the third spacer and the fourth spacer along the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.70 < EP34 / (T34 + T45) ≤ 1.

10.

6. The optical lens according to claim 1, wherein, The spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The inner diameter d5s of the object-side surface of the fifth spacer, the inner diameter d6s of the object-side surface of the sixth spacer, and the spacing distance EP56 between the fifth spacer and the sixth spacer along the optical axis satisfy: 2.45 ≤ (d6s - d5s) / EP56 < 3.

05.

7. The optical lens according to claim 1, characterized in that, The spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The spacing distance EP56 between the fifth spacer and the sixth spacer along the optical axis, the central thickness CT6 of the sixth lens, and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 0.85 < EP56 / (CT6 + T56) < 1.

20.

8. The optical lens according to claim 1, wherein, The spacer group further includes a fifth spacer disposed between the fifth lens and the sixth lens and at least partially in contact with the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially in contact with the image side surface of the sixth lens. The outer diameter D6s of the object-side surface of the sixth spacer and the outer diameter D5m of the image side surface of the fifth spacer satisfy: 1.15 ≤ D6s / D5m < 1.

30.

9. The optical lens according to claim 1, characterized in that, The spacer group further includes at least a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens, and a sixth spacer disposed between the sixth lens and the seventh lens and at least partially contacting the image side surface of the sixth lens. The sum of the maximum thicknesses of all the spacers between the fifth lens and the sixth lens is ∑CP5, the sum of the maximum thicknesses of all the spacers between the sixth lens and the seventh lens is ∑CP6, and the center thickness of the sixth lens is CT6, satisfying: 1.15 < (∑CP5 + ∑CP6) / CT6 < 1.

70.

10. The optical lens according to claim 1, characterized in that, The spacer group further includes a fourth spacer disposed between the fourth lens and the fifth lens and at least partially contacting the image side surface of the fourth lens, and a fifth spacer disposed between the fifth lens and the sixth lens and at least partially contacting the image side surface of the fifth lens. The inner diameter d5m of the image side surface of the fifth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the center thickness CT5 of the fifth lens satisfy: 1.70 < (d5m - d4m) / (T45 + CT5) < 2.60.

Images