Optical lens

Abstract

The application provides an optical lens. The optical lens comprises a lens barrel, seven lenses and at least one spacer, the object side end surface of the lens barrel and the image side end surface of the lens barrel are both planes, the seven lenses comprise a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side; the at least one spacer comprises a fourth spacer; when half of the maximum field angle of the optical lens Semi-FOV and the maximum height L of the lens barrel satisfy: 0.5 < TAN (Semi-FOV) / L < 0.7, the radius of curvature R8 of the image side surface of the fourth lens, the refractive index N4 of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer satisfy: 1.45 < R8*N4 / d4s < 1.7. The application solves the problem that the optical lens in the prior art has poor assembly stability under the condition of meeting the ultra-wide angle and miniaturization.

Description

Technical Field

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

[0002] Currently, with the development of the mobile phone industry, photography capabilities have gradually become one of the key concerns for users. Wider and clearer shots are becoming important reasons for users to choose a mobile phone. To meet user needs, ultra-wide-angle optical lenses are typically equipped to capture a wider shooting range. Since these optical lenses need to be used in smartphones, which are usually small, they also need to meet miniaturization requirements. However, current miniaturized ultra-wide-angle lenses suffer from reliability issues. The assembly stability of some lenses within the optical lens is difficult to guarantee, leading to deformation of the spacers that come into contact with it, generating stray light and affecting image quality.

[0003] In other words, existing optical lenses suffer from poor assembly stability. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens to solve the problem of poor assembly stability in existing optical lenses.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising a lens barrel, seven lenses, and at least one spacer. The seven lenses and at least one spacer are all disposed within the lens barrel. The object-side end face and the image-side end face of the lens barrel are both planar. The seven lenses, from the object side to the image side, sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The at least one spacer includes a fourth spacer, which is located between the fourth and fifth lenses and contacts the image-side surface portion of the fourth lens. When the maximum field of view (Semi-FOV) of the optical lens satisfies 0.5 < TAN(Semi-FOV) / L < 0.7 with respect to the maximum height L of the lens barrel, the radius of curvature R8 of the image-side surface of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object-side surface of the fourth spacer satisfy 1.45 < R8*N4 / d4s < 1.7.

[0006] According to another aspect of the present invention, an optical lens is also provided, comprising a lens barrel, seven lenses, and at least one spacer. The seven lenses and at least one spacer are all disposed within the lens barrel. The seven lenses, from the object side to the image side, sequentially include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The at least one spacer includes a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth and fifth lenses and contacts the image-side surface of the fourth lens. The fifth spacer is located between the fifth and sixth lenses and contacts the image-side surface of the fifth lens. The maximum field of view (Semi-FOV) of the optical lens and the maximum height L of the lens barrel satisfy the following condition: 0.5 < TAN(Semi-FOV) / L < 0.8. The inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d5s of the object-side surface of the fifth spacer, the maximum effective radius DT61 of the object-side surface of the sixth lens, and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy the following condition: -0.4 < (DT61-DT62) / (d5s-d4s) < -0.2.

[0007] Furthermore, the first lens has negative optical power, with both its object-side and image-side surfaces being concave; the second lens has positive optical power, with both its object-side and image-side surfaces being convex; the third lens has positive optical power, with both its object-side and image-side surfaces being convex; the fourth lens has negative optical power, with both its object-side and image-side surfaces being convex; the fifth lens has positive optical power, with both its object-side and image-side surfaces being convex; the sixth lens has positive optical power, with both its image-side and image-side surfaces being convex; and the seventh lens has negative optical power, with both its object-side and image-side surfaces being convex.

[0008] Furthermore, at least one spacer also includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d1m of the image-side surface of the first spacer satisfy the following condition: 6.5 < f2 * N2 / d1m < 6.7.

[0009] Furthermore, at least one spacer also includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The gap EP01 between the object-side end face of the lens barrel and the first spacer, the maximum thickness CP1 of the first spacer, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following: 1.0 < (EP01 + CP1) / T12 < 1.4.

[0010] Furthermore, at least one spacer also includes a second spacer and a third spacer. The second spacer is located between the second lens and the third lens and contacts the image-side surface of the second lens. The third spacer is located between the third lens and the fourth lens and contacts the image-side surface of the third lens. The axial distance SAG31 between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens and the spacing EP23 between the second spacer and the third spacer satisfy the following condition: 0.2 < SAG31 / EP23 < 0.5.

[0011] Furthermore, at least one spacer also includes a second spacer and a third spacer. The second spacer is located between the second lens and the third lens and contacts the image-side surface of the second lens. The third spacer is located between the third lens and the fourth lens and contacts the image-side surface of the third lens. The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP2 of the second spacer, and the maximum thickness CP3 of the third spacer satisfy the following: 3.0 < (T23 + T34) / (CP2 + CP3) < 3.5.

[0012] Furthermore, at least one spacer also includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The gap EP01 between the object-side end face of the lens barrel and the first spacer, the outer diameter D1m of the image-side surface of the first spacer, the radius of curvature R1 of the object-side surface of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens satisfy the following: -2.0 < EP01 * D1m / (R1 * CT1) < -1.2.

[0013] Furthermore, the axial distance SAG42 between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens satisfies the following condition with respect to the maximum thickness CP4 of the fourth spacer: 8.5 < SAG42 / CP4 < 9.5.

[0014] Furthermore, at least one spacer also includes a third spacer, which is located between the third lens and the fourth lens and contacts the image-side portion of the third lens. The center thickness CT4 of the fourth lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the gap EP34 between the third spacer and the fourth spacer satisfy the following: 0.3 < (CT4 + T34) / EP34 < 0.5.

[0015] Furthermore, at least one spacer also includes a fifth spacer, which is located between the fifth lens and the sixth lens and contacts the image-side surface of the fifth lens. The inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d5s of the object-side surface of the fifth spacer, the maximum effective radius DT61 of the object-side surface of the sixth lens, and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy the following: -0.4 < (DT61-DT62) / (d5s-d4s) < -0.2.

[0016] Furthermore, at least one spacer also includes a sixth spacer, which is located between the sixth lens and the seventh lens and contacts the image-side portion of the sixth lens. The outer diameter D6s of the object-side portion of the sixth spacer, the effective focal length f6 of the sixth lens, and the refractive index N6 of the sixth lens satisfy the following: 1.7 < D6s / (f6*N6) < 2.2.

[0017] Furthermore, at least one spacer also includes a second spacer, which is located between the second lens and the third lens and contacts the image-side surface of the second lens. The effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object-side surface of the second spacer satisfy the following condition: 9.5 < f2 * N2 / d2s < 11.0.

[0018] Furthermore, at least one spacer also includes a sixth spacer, which is located between the sixth lens and the seventh lens and contacts the image-side surface of the sixth lens. The outer diameter D6m of the image-side surface of the sixth spacer, the effective focal length f7 of the seventh lens, and the refractive index N7 of the seventh lens satisfy the following: -1.6 < D6m / (f7*N7) < -1.3.

[0019] According to the technical solution of the present invention, the optical lens includes a lens barrel, seven lenses, and at least one spacer. The seven lenses and at least one spacer are all disposed in the lens barrel. The object-side end face and the image-side end face of the lens barrel are both planar. The seven lenses, from the object side to the image side, are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The at least one spacer includes a fourth spacer, which is located between the fourth lens and the fifth lens and contacts the image-side surface of the fourth lens. When the maximum field of view (Semi-FOV) of the optical lens and the maximum height L of the lens barrel satisfy the condition: 0.5 < TAN(Semi-FOV) / L < 0.7, the radius of curvature R8 of the image-side surface of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object-side surface of the fourth spacer satisfy the condition: 1.45 < R8*N4 / d4s < 1.7.

[0020] The optical lens of this application consists of a lens barrel, seven lenses disposed in the lens barrel, and at least one spacer. By reasonably arranging the seven lenses and at least one spacer, and when the optical lens satisfies 0.5 < TAN(Semi-FOV) / L < 0.7, the ultra-wide-angle attribute of the optical lens is ensured by controlling the maximum field of view, and the number of incident rays is guaranteed; the maximum height of the lens barrel is controlled to ensure the overall size and the miniaturization of the optical lens. However, reliability issues can easily arise when meeting ultra-wide-angle and miniaturization requirements. Furthermore, some lenses may experience surface deviation, distortion, and appearance problems due to molding errors during actual production, thus affecting the stability of the bearing. Therefore, this application improves the forming capability of the fourth lens by constraining 1.45 < R8*N4 / d4s < 1.7 and controlling the radius of curvature of the image side of the fourth spacer and the refractive index of the fourth lens. By controlling the inner diameter of the object side of the fourth spacer, the bearing relationship between the fourth and fifth lenses can be made more stable, thereby effectively avoiding deformation of the fourth spacer and thus avoiding stray light generated by the deformation of the fourth spacer, thereby controlling excess incident light and reducing stray light. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 A dimensioned diagram of an optical lens according to an alternative embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the structure of an optical lens in the first state according to Embodiment 1 of the present invention is shown;

[0024] Figure 3 A schematic diagram of the structure of the optical lens in the second state according to Embodiment 1 of the present invention is shown;

[0025] Figures 4 to 6 The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical lens of Embodiment 1 of the present invention are shown respectively.

[0026] Figure 7 A schematic diagram of the structure of the optical lens in the first state according to Embodiment 2 of the present invention is shown;

[0027] Figure 8 A schematic diagram of the structure of the optical lens in the second state according to Embodiment 2 of the present invention is shown;

[0028] Figures 9 to 11 The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical lens of Embodiment 2 of the present invention are shown.

[0029] Figure 12 A schematic diagram of the structure of the optical lens in the first state according to Embodiment 3 of the present invention is shown;

[0030] Figure 13 A schematic diagram of the structure of the optical lens in the second state according to Embodiment 3 of the present invention is shown;

[0031] Figures 14 to 16 The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical lens of Embodiment 3 of the present invention are shown respectively.

[0032] The above figures include the following reference numerals:

[0033] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; E6, Sixth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens; E7, Seventh lens; S13, Object-side surface of the seventh lens; S14, Image-side surface of the seventh lens; P1, First spacer; P2, Second spacer; P3, Third spacer; P4, Fourth spacer; P5, Fifth spacer; P6, Sixth spacer. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0036] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0037] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0038] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0039] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine convexity or concavity. For the incident light side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the emitting light side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0040] To address the problem of poor assembly stability in existing optical lenses while meeting ultra-wide-angle and miniaturization requirements, this invention provides an optical lens.

[0041] like Figures 1 to 16 As shown, in an optional embodiment of this application, the optical lens includes a lens barrel, seven lenses, and at least one spacer. All seven lenses and the spacer are disposed within the lens barrel. The seven lenses, from the object-side to the image-side, are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The at least one spacer includes a fourth spacer, which is located between the fourth and fifth lenses and contacts the image-side portion of the fourth lens. When the maximum field of view (Semi-FOV) of the optical lens satisfies 0.5 < TAN(Semi-FOV) / L < 0.7, the radius of curvature R8 of the image-side of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object-side of the fourth spacer satisfy 1.45 < R8*N4 / d4s < 1.7.

[0042] The optical lens of this application consists of a lens barrel, seven lenses disposed in the lens barrel, and at least one spacer. By reasonably arranging the seven lenses and at least one spacer, and when the optical lens satisfies 0.5 < TAN(Semi-FOV) / L < 0.7, the ultra-wide-angle attribute of the optical lens is ensured by controlling the maximum field of view, and the number of incident rays is guaranteed; the maximum height of the lens barrel is controlled to ensure the overall size and the miniaturization of the optical lens. However, reliability issues can arise when meeting ultra-wide-angle and miniaturization requirements. In actual production, some lenses may experience surface deviation, distortion, and appearance problems due to molding errors, thus affecting their stability. Therefore, this application improves the molding capability of the fourth lens by constraining 1.45 < R8*N4 / d4s < 1.7 and controlling the radius of curvature of the image side of the fourth spacer and the refractive index of the fourth lens. By controlling the inner diameter of the object side of the fourth spacer, the bearing relationship between the fourth and fifth lenses can be made more stable, thereby effectively avoiding deformation of the fourth spacer and thus avoiding stray light generated by the deformation of the fourth spacer, thereby controlling excess incident light and reducing stray light.

[0043] Furthermore, Table 1-1 shows the assembly deformation analysis of the fourth lens of the optical lens. Sample 1 shows the center and edge displacements of the fourth lens with TAN(Semi-FOV) / L = 0.6 and R8*N4 / d4s = 1.6; Sample 2 shows the center and edge displacements of the fourth lens with TAN(Semi-FOV) / L = 0.4 and R8*N4 / d4s = 1.4; and Sample 3 shows the center and edge displacements of the fourth lens with TAN(Semi-FOV) / L = 0.8 and R8*N4 / d4s = 1.8. A comparison shows that the center and edge displacements of the fourth lens in Samples 2 and 3 are significantly larger. Therefore, when the conditions 0.5 < TAN(Semi-FOV) / L < 0.7 and 1.45 < R8*N4 / d4s < 1.7 are not met, the support of the fourth lens is unstable. Compared to Samples 2 and 3, Sample 1 shows significantly reduced center point and edge point displacements of the fourth lens, indicating more stable support. It is evident that when the constraints 0.5 < TAN(Semi-FOV) / L < 0.7 and 1.45 < R8*N4 / d4s < 1.7, the fourth lens exhibits greater stability, meeting higher assembly stability requirements and thus further enhancing the reliability of the optical lens.

[0044]

[0045] Table 1-1

[0046] In this embodiment, the first lens has negative optical power, with both its object-side and image-side surfaces being concave; the second lens has positive optical power, with both its object-side and image-side surfaces being convex; the third lens has positive optical power, with both its object-side and image-side surfaces being convex; the fourth lens has negative optical power, with both its object-side and image-side surfaces being convex; the fifth lens has positive optical power, with both its object-side and image-side surfaces being convex; the sixth lens has positive optical power, with both its image-side and image-side surfaces being convex; and the seventh lens has negative optical power, with both its object-side and image-side surfaces being convex. The optical lens as a whole is composed of seven plastic aspherical surfaces. Optical power represents the ability of the optical system to deflect light. The first lens has a light-diverging effect, the second lens has a light-converging effect, the third lens has a light-converging effect, the fourth lens has a light-diverging effect, the fifth lens has a light-converging effect, the sixth lens has a light-converging effect, and the seventh lens has a light-diverging effect. This combination ensures that the combined optical group becomes an ideal optical group under ideal conditions.

[0047] In this embodiment, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d1m of the image-side surface of the first spacer satisfy 6.5 < f2 * N2 / d1m < 6.7. By constraining this condition, the distortion range can be controlled within a reasonable range by controlling the effective focal length and refractive index of the second lens; by controlling the inner diameter of the image-side surface of the first spacer, the outgoing light can be controlled, effectively reducing stray light phenomena from other lenses.

[0048] In this embodiment, at least one spacer further includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The distance EP01 between the object-side end face of the lens barrel and the first spacer, the maximum thickness CP1 of the first spacer, and the air gap T12 between the first and second lenses on the optical axis satisfy the following condition: 1.0 < (EP01 + CP1) / T12 < 1.4. By constraining this condition, controlling the distance between the object-side end face of the lens barrel and the first spacer helps to optimize the lens's formability and ensure that the thickness ratio of the first lens is within a reasonable range; controlling the maximum thickness of the first spacer and the air gap between the first and second lenses on the optical axis can optimize the structure of the first and second lenses; and by adjusting the thickness of the spacer, the lens structure can be optimized, effectively improving the image quality.

[0049] In this embodiment, at least one spacer further includes a second spacer and a third spacer. The second spacer is located between the second lens and the third lens and contacts the image-side surface of the second lens. The third spacer is located between the third lens and the fourth lens and contacts the image-side surface of the third lens. The axial distance SAG31 between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens and the distance EP23 between the second and third spacers satisfy the condition: 0.2 < SAG31 / EP23 < 0.5. By constraining this condition, and controlling the ratio of the axial distance between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens to the distance between the second and third spacers, the incident and exit paths of light can be effectively controlled, and the optical imaging system can be adjusted.

[0050] In this embodiment, the air gap T23 between the second and third lenses on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, the maximum thickness CP2 of the second spacer, and the maximum thickness CP3 of the third spacer satisfy the following condition: 3.0 < (T23 + T34) / (CP2 + CP3) < 3.5. Constraining this condition effectively blocks stray light and improves image quality.

[0051] In this embodiment, the following conditions are satisfied: -2.0 < EP01 * D1m / (R1 * CT1) < -1.2, where: the distance EP01 between the object-side end face of the lens barrel and the first spacer, the outer diameter D1m of the image-side surface of the first spacer, the radius of curvature R1 of the object-side surface of the first lens, and the maximum effective radius DT12 of the image-side surface of the first lens are all constrained. By controlling the distance between the object-side end face of the lens barrel and the first spacer, the structure of the first lens can be optimized; controlling the outer diameter of the image-side surface of the first spacer allows for the control of the emitted light rays; and controlling the radius of curvature of the object-side surface of the first lens and the center thickness of the first lens on the optical axis helps to optimize the feasibility of lens forming and ensures that the thickness ratio of the first lens is within a reasonable range.

[0052] In this embodiment, the axial distance SAG42 between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens, and the maximum thickness CP4 of the fourth spacer, satisfy the following condition: 8.5 < SAG42 / CP4 < 9.5. By constraining this condition, the lens forming can be effectively controlled by controlling the ratio of the axial distance between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens to the maximum thickness of the fourth spacer.

[0053] In this embodiment, the center thickness CT4 of the fourth lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the spacing EP34 between the third and fourth spacers satisfy the following condition: 0.3 < (CT4 + T34) / EP34 < 0.5. Constraining this condition allows for optimization of lens forming feasibility by controlling the center thickness of the fourth lens on the optical axis and the air gap between the third and fourth lenses. Controlling the spacing between the third and fourth spacers effectively controls the thickness ratio of the fourth lens, which is beneficial for forming.

[0054] In this embodiment, at least one spacer further includes a fifth spacer, which is located between the fifth lens and the sixth lens and contacts the image-side surface of the fifth lens. The inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d5s of the object-side surface of the fifth spacer, the maximum effective radius DT61 of the object-side surface of the sixth lens, and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy the following condition: -0.4 < (DT61-DT62) / (d5s-d4s) < -0.2. By constraining this condition, the radius of the sixth lens can be effectively controlled by controlling the maximum effective radius of the object-side surface and the maximum effective radius of the image-side surface of the sixth lens, thereby indirectly controlling the inner diameter of the lens barrel and improving the uniformity of the lens barrel wall thickness. Controlling the inner diameters of the object-side surfaces of the fifth and fourth spacers can ensure effective blocking of stray light from the fifth and sixth lenses, thus adjusting the optical imaging system.

[0055] In this embodiment, at least one spacer further includes a sixth spacer, which is located between the sixth lens and the seventh lens and contacts the image-side surface of the sixth lens. The outer diameter D6s of the object-side surface of the sixth spacer, the effective focal length f6 of the sixth lens, and the refractive index N6 of the sixth lens satisfy the following condition: 1.7 < D6s / (f6*N6) < 2.2. By constraining this condition, the incident light can be controlled by controlling the outer diameter of the object-side surface of the sixth spacer, reducing stray light phenomena in the seventh lens; by controlling the effective focal length and refractive index of the sixth lens, the distortion range can be further optimized, and the image quality can be improved.

[0056] In this embodiment, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object-side surface of the second spacer satisfy the condition: 9.5 < f2 * N2 / d2s < 11.0. By constraining this condition and controlling the effective focal length and refractive index of the second lens, the distortion range can be further optimized; by controlling the inner diameter of the object-side surface of the second spacer, the incident light can be controlled, reducing stray light phenomena from the second lens.

[0057] In this embodiment, the outer diameter D6m of the image-side surface of the sixth spacer, the effective focal length f7 of the seventh lens, and the refractive index N7 of the seventh lens satisfy the following condition: -1.6 < D6m / (f7*N7) < -1.3. By constraining this condition, controlling the outer diameter of the image-side surface of the sixth spacer can control the outgoing light rays and reduce stray light from the seventh lens; controlling the effective focal length and refractive index of the seventh lens can keep the distortion range within a reasonable range.

[0058] In addition, in another optional embodiment of this application, an optical lens is provided, including a lens barrel, seven lenses, and at least one spacer. The seven lenses and at least one spacer are all disposed within the lens barrel. The seven lenses, from the object side to the image side, are sequentially arranged as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The at least one spacer includes a fourth spacer and a fifth spacer. The fourth spacer is located between the fourth and fifth lenses and contacts the image side portion of the fourth lens. The fifth spacer is located between the fifth lens and the... The six lenses are in contact with each other and with the image-side surface of the fifth lens; the maximum field of view (Semi-FOV) of the optical lens and the maximum height L of the lens barrel satisfy: 0.5 < TAN(Semi-FOV) / L < 0.7; the inner diameter d4s of the object-side surface of the fourth spacer, the inner diameter d5s of the object-side surface of the fifth spacer, the maximum effective radius DT61 of the object-side surface of the sixth lens and the maximum effective radius DT62 of the image-side surface of the sixth lens satisfy: -0.4 < (DT61-DT62) / (d5s-d4s) < -0.2.

[0059] The optical lens of this application consists of a lens barrel, seven lenses disposed within the lens barrel, and at least one spacer. Under the condition that 0.5 < TAN(Semi-FOV) / L < 0.7, the ultra-wide-angle property of the optical lens can be guaranteed, ensuring the amount of incident light. Controlling the maximum height of the lens barrel ensures the overall size and miniaturization of the optical lens. However, satisfying both ultra-wide-angle and miniaturization can easily lead to severe stray light problems. Therefore, this application constrains -0.4 < (DT61-DT62) / (d5s-d4s) < -0.2, which helps to ensure that the optical lens, while satisfying ultra-wide-angle properties and miniaturization, effectively controls the radius of the sixth lens by controlling the maximum effective radius of the object-side surface and the maximum effective radius of the image-side surface of the sixth lens. This indirectly controls the inner diameter of the lens barrel, improving the uniformity of the lens barrel wall thickness. Controlling the inner diameter of the object-side surface of the fifth and fourth spacers effectively blocks stray light from the fifth and sixth lenses, adjusting the optical imaging system.

[0060] Optionally, the aforementioned optical lens may also include protective glass for protecting the photosensitive element located on the imaging plane.

[0061] The optical lens in this application may employ multiple lenses, such as the seven lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0062] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0063] Figure 1 A schematic diagram of the structure of an optical lens of this application is shown, wherein Figure 1 The figures clearly indicate parameters such as CP2, CP3, CP4, EP01, EP23, EP34, D6s, d5s, d4s, d2s, d1m, D1m, D6m, and L, providing a clear and intuitive understanding of their meaning. For the sake of clarity regarding the optical lens and specific surface shapes, these parameters will not be shown in the accompanying drawings when describing specific embodiments.

[0064] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0065] It should be noted that in the following embodiments, there are a first state and a second state. In the first state and the second state of the same embodiment, the parameters such as the radius of curvature, center thickness, and spacing between the lenses (from the first to the seventh lens) are the same. However, the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel, the first to the sixth spacers, and the shape of some lenses are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0066] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 3, is applicable to all embodiments of this application.

[0067] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0068] Example 1

[0069] like Figures 2 to 6 As shown, the optical lens of Embodiment 1 is described. Figure 2 A schematic diagram of the optical lens in the first embodiment is shown. Figure 3 A schematic diagram of the optical lens of Embodiment 1 in its second state is shown.

[0070] like Figure 2 and Figure 3 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of 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 sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0071] like Figure 2 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first spacer P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side surface and image-side surface of the fifth spacer P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively. The object-side surface and image-side surface of the sixth spacer P6 abut against the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively.

[0072] like Figure 3 As shown, in the second state, the way the spacers abut and contact with each other is the same as in the first state. Please refer to the relevant description in the first state. It will not be repeated here.

[0073] In summary, the structural parameters of the optical lens in Embodiment 1 in the first state 1-1 and the second state 1-2 are shown in Table 1.

[0074] (Unit: mm)

[0075]

[0076]

[0077] Table 1

[0078] In Embodiment 1, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0079] In Embodiment 1, the effective focal length f1 of the first lens is -2.63mm, the effective focal length f2 of the second lens is 11.33mm, the effective focal length f3 of the third lens is 2.22mm, the effective focal length f4 of the fourth lens is -4.46mm, the effective focal length f5 of the fifth lens is 13.14mm, the effective focal length f6 of the sixth lens is 2.36mm, the effective focal length f7 of the seventh lens is -2.94mm, half of the maximum field of view (Semi-FOV) of the optical lens is 77.8°, the on-axis distance SAG31 between the intersection of the object-side surface and the optical axis of the third lens and the vertex of the effective radius of the object-side surface of the third lens is 0.18mm, the on-axis distance SAG42 between the intersection of the image-side surface and the optical axis of the fourth lens and the vertex of the maximum effective radius of the image-side surface of the fourth lens is 0.16mm, the maximum effective radius DT61 of the object-side surface of the sixth lens is 1.69mm, and the maximum effective radius DT62 of the image-side surface of the sixth lens is 1.90mm.

[0080] Table 2 shows the basic structural parameters of the optical lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0081]

[0082]

[0083] Table 2

[0084] In Embodiment 1, the object-side and image-side surfaces of the first to seventh lenses are aspherical, and the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0085]

[0086] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; 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 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Example 1.

[0087]

[0088]

[0089] Table 3

[0090] Figure 4 The on-axis chromatic aberration curve of the optical lens of Embodiment 1 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the optical lens. Figure 5 The astigmatism curve of the optical lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6 The magnification chromatic aberration curve of the optical lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0091] according to Figures 4 to 6 As can be seen, the optical lens given in Example 1 can achieve good imaging quality.

[0092] Example 2

[0093] like Figures 7 to 11 As shown, the optical lens of Embodiment 2 is described. Figure 7 A schematic diagram of the optical lens in the first state of Embodiment 2 is shown. Figure 8 A schematic diagram of the optical lens of Embodiment 2 in its second state is shown.

[0094] like Figure 7 and Figure 8 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of 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 sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0095] like Figure 7As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first spacer P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side surface and image-side surface of the fifth spacer P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively. The object-side surface and image-side surface of the sixth spacer P6 abut against the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively.

[0096] like Figure 13 As shown, in the second state, the way the spacers abut and contact with each other is the same as in the first state. Please refer to the relevant description in the first state. It will not be repeated here.

[0097] In summary, the structural parameters of the optical lens in Embodiment 2 in the first state 2-1 and the second state 2-2 are shown in Table 4.

[0098] (Unit: mm)

[0099] Parameters / Status 2-1 2-2 d1m(mm) 2.628 2.628 D1m(mm) 5.478 6.820 d2s(mm) 1.740 1.740 d4s(mm) 2.611 2.611 d5s(mm) 3.255 3.336 D6s(mm) 7.660 7.660 D6m (mm) 7.660 7.660 EP01(mm) 1.077 1.077 EP23(mm) 0.598 0.598 EP34(mm) 0.750 0.750 CP2(mm) 0.018 0.018 CP3 (mm) 0.018 0.018 CP4 (mm) 0.018 0.018 L(mm) 7.076 7.135

[0100] Table 4

[0101] In Embodiment 2, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0102] In Embodiment 2, the effective focal length f1 of the first lens is -2.58mm, the effective focal length f2 of the second lens is 10.73mm, the effective focal length f3 of the third lens is 2.22mm, the effective focal length f4 of the fourth lens is -3.98mm, the effective focal length f5 of the fifth lens is 8.85mm, the effective focal length f6 of the sixth lens is 2.77mm, the effective focal length f7 of the seventh lens is -3.53mm, half of the maximum field of view (Semi-FOV) of the optical lens is 77.7°, the on-axis distance SAG31 between the intersection of the object-side surface and the optical axis of the third lens and the vertex of the effective radius of the object-side surface of the third lens is 0.19mm, the on-axis distance SAG42 between the intersection of the image-side surface and the optical axis of the fourth lens and the vertex of the maximum effective radius of the image-side surface of the fourth lens is 0.16mm, the maximum effective radius DT61 of the object-side surface of the sixth lens is 1.76mm, and the maximum effective radius DT62 of the image-side surface of the sixth lens is 1.96mm.

[0103] Table 5 shows the basic structural parameters of the optical lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0104]

[0105]

[0106] Table 5

[0107] Table 6 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Example 2.

[0108]

[0109]

[0110] Table 6

[0111] Figure 9 The on-axis chromatic aberration curve of the optical lens of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 10 The astigmatism curve of the optical lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 11 The magnification chromatic aberration curve of the optical lens in Embodiment 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0112] according to Figures 9 to 11 It can be seen that the optical lens given in Example 2 can achieve good imaging quality.

[0113] Example 3

[0114] like Figures 12 to 16 As shown, the optical lens of Embodiment 3 is described. Figure 12 A schematic diagram of the optical lens in the first state of Embodiment 3 is shown. Figure 13 A schematic diagram of the optical lens of Embodiment 3 in its second state is shown.

[0115] like Figure 12 and Figure 13 As shown, the optical lens includes a lens barrel P0 and the following components arranged sequentially from the object side to the image side along the optical axis of 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 sixth lens E6, a sixth spacer P6, and a seventh lens E7.

[0116] like Figure 12 As shown, in the first state, the object-side surface S1 of the first lens abuts against the lens barrel P0. The object-side surface and image-side surface of the first spacer P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side surface and image-side surface of the fifth spacer P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively. The object-side surface and image-side surface of the sixth spacer P6 abut against the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively.

[0117] like Figure 13 As shown, in the second state, the way the spacers abut and contact with each other is the same as in the first state. Please refer to the relevant description in the first state. It will not be repeated here.

[0118] In summary, the structural parameters of the optical lens in Embodiment 3 in the first state 3-1 and the second state 3-2 are shown in Table 7.

[0119] (Unit: mm)

[0120]

[0121]

[0122] Table 7

[0123] In Embodiment 3, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is convex. The object-side surface S13 of the seventh lens is convex, and the image-side surface S14 of the seventh lens is concave.

[0124] In Embodiment 3, the effective focal length f1 of the first lens is -2.55mm, the effective focal length f2 of the second lens is 10.52mm, the effective focal length f3 of the third lens is 2.27mm, the effective focal length f4 of the fourth lens is -4.03mm, the effective focal length f5 of the fifth lens is 8.25mm, the effective focal length f6 of the sixth lens is 2.75mm, the effective focal length f7 of the seventh lens is -3.42mm, half of the maximum field of view (Semi-FOV) of the optical lens is 77.4°, the on-axis distance SAG31 between the intersection of the object-side surface and the optical axis of the third lens and the vertex of the effective radius of the object-side surface of the third lens is 0.17mm, the on-axis distance SAG42 between the intersection of the image-side surface and the optical axis of the fourth lens and the vertex of the maximum effective radius of the image-side surface of the fourth lens is 0.17mm, the maximum effective radius DT61 of the object-side surface of the sixth lens is 1.79mm, and the maximum effective radius DT62 of the image-side surface of the sixth lens is 1.96mm.

[0125] Table 8 shows the basic structural parameters of the optical lens in Embodiment 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0126]

[0127]

[0128] Table 8

[0129] Table 9 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S14 in Example 3.

[0130] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.7872E-01 -1.8885E-01 5.6861E-02 -1.7913E-02 6.2736E-03 -2.5783E-03 9.8093E-04 S2 3.2922E-01 -5.7077E-02 -9.0651E-03 -1.4132E-03 1.1938E-03 6.6095E-04 -3.9896E-05 S3 -7.6997E-02 -1.0832E-02 2.1174E-03 1.2339E-03 1.5965E-04 -1.2985E-04 -7.5954E-05 S4 -7.6709E-02 1.1847E-02 -8.1120E-04 8.3090E-04 -1.3718E-04 7.0235E-05 -2.8441E-05 S5 -6.8000E-02 1.2578E-02 -1.6109E-03 8.6200E-04 -2.1445E-04 8.6072E-05 -3.5664E-05 S6 -5.9911E-02 3.9461E-03 3.3203E-03 1.0109E-03 3.3600E-04 1.9754E-04 2.9387E-05 S7 -2.2832E-01 5.7580E-03 -9.0139E-04 7.8017E-04 -7.0597E-05 2.5976E-04 -5.2270E-06 S8 -2.1926E-01 2.8896E-02 -6.8303E-03 1.1877E-03 -4.5093E-04 2.7256E-04 -8.0212E-05 S9 -7.1168E-02 2.2847E-02 -2.4538E-03 1.0560E-04 -7.5567E-04 1.9652E-04 7.5646E-07 S10 -3.2535E-01 3.5255E-02 5.8031E-03 -1.2316E-03 -5.1180E-04 8.2472E-05 1.8204E-04 S11 -3.1836E-01 3.8581E-04 3.0127E-03 -1.0846E-02 -4.9681E-03 2.5531E-03 1.9354E-03 S12 6.2406E-01 -6.6184E-02 1.8862E-02 -6.1430E-03 -4.3218E-03 8.4337E-03 7.4462E-04 S13 -1.7439E+00 2.5457E-01 -5.2663E-02 4.6393E-02 -1.3753E-02 8.8187E-03 -8.1704E-03 S14 -1.8265E+00 3.0598E-01 -1.3964E-01 6.8957E-02 -2.8824E-02 1.8421E-02 -1.1180E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.1986E-04 1.7047E-04 -6.6929E-05 3.7189E-05 -9.2988E-06 7.3375E-06 -2.3500E-06 S2 -3.9113E-05 -1.2801E-04 -3.6310E-05 -3.4024E-05 7.5497E-06 3.6580E-06 8.1941E-06 S3 -2.4612E-05 4.4245E-06 8.8550E-06 3.6186E-06 9.3436E-08 -2.2109E-06 5.6880E-07 S4 5.5388E-06 -3.0881E-06 3.0985E-06 -2.4919E-07 9.7557E-07 -3.3362E-07 -1.1279E-07 S5 6.9805E-06 -9.1782E-06 2.2563E-07 -1.7508E-06 2.1994E-06 -4.7908E-07 0.0000E+00 S6 -1.7730E-05 -1.7950E-05 -7.4505E-06 -2.7661E-06 -4.2763E-06 4.0713E-07 9.6464E-07 S7 -1.1729E-05 -3.5204E-05 -6.1345E-07 -3.5092E-06 4.2861E-06 2.6408E-07 1.4590E-07 S8 -7.0701E-06 -8.1450E-06 6.3040E-06 2.4240E-06 8.8100E-07 2.5879E-06 -1.8304E-06 S9 1.1291E-05 -4.1174E-05 8.0230E-06 -8.8258E-06 4.3454E-06 -4.5966E-06 3.5724E-06 S10 -2.8377E-05 9.1941E-05 -6.0185E-05 3.8536E-05 -2.6670E-05 1.2471E-05 -6.2806E-06 S11 -1.8928E-04 3.6068E-04 1.8565E-05 2.5890E-05 -4.8136E-05 -4.8564E-05 6.9717E-06 S12 -1.2867E-03 -2.3121E-05 -2.1507E-04 -4.1118E-05 -4.9246E-05 -3.6045E-05 4.7792E-05 S13 1.9196E-03 -8.1153E-04 2.4261E-04 2.8785E-04 -1.6292E-05 1.0767E-04 -1.1706E-04 S14 6.6906E-03 -3.8433E-03 1.9297E-03 -1.0105E-03 4.8337E-04 -2.4671E-04 7.6283E-05

[0131] Table 9

[0132] Figure 14The on-axis chromatic aberration curve of the optical lens of Embodiment 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 15 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. Figure 16 The magnification chromatic aberration curve of the optical lens of Embodiment 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0133] according to Figures 14 to 16 It can be seen that the optical lens given in Example 3 can achieve good imaging quality.

[0134] In summary, Examples 1 to 3 satisfy the relationships shown in Table 10.

[0135] Conditional / Example 1-1 1-2 2-1 2-2 3-1 3-2 TAN(Semi-FOV) / L 0.66 0.67 0.65 0.64 0.63 0.64 EP01*D1m / (R1*CT1) -1.36 -1.70 -1.24 -1.55 -1.54 -1.92 f2*N2 / d1m 6.66 6.66 6.61 6.61 6.68 6.68 (EP01+CP1) / T12 1.24 1.24 1.33 1.33 1.18 1.18 SAG31 / EP23 0.30 0.30 0.31 0.31 0.28 0.28 (T23+T34) / (CP2+CP3) 3.06 3.06 3.07 3.07 3.26 3.26 R8*N4 / d4s 1.61 1.61 1.50 1.50 1.57 1.57 SAG42 / CP4 8.81 8.81 8.92 8.92 9.20 9.20 (CT4+T34) / EP34 0.48 0.48 0.47 0.47 0.44 0.44 (DT61-DT62) / (d5s-d4s) -0.36 -0.36 -0.32 -0.29 -0.36 -0.36 D6s / (f6*N6) 2.10 2.10 1.79 1.79 1.80 1.80 f2*N2 / d2s 10.67 10.67 9.98 9.98 9.84 9.84 D6m / (f7*N7) -1.58 -1.58 -1.32 -1.32 -1.36 -1.36

[0136] Table 10

[0137] It should be noted that in Table 10, 1-1 represents the optical lens in the first embodiment in the first state, 1-2 represents the optical lens in the first embodiment in the second state, 2-1 represents the optical lens in the second embodiment in the first state, 2-2 represents the optical lens in the second embodiment in the second state, 3-1 represents the optical lens in the third embodiment in the first state, and 3-2 represents the optical lens in the third embodiment in the second state.

[0138] Table 11 shows the effective focal lengths f1 to f7 of each lens in Examples 1 to 3.

[0139]

[0140]

[0141] Table 11

[0142] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0143] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0144] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0145] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens comprises a lens barrel, seven lenses, and at least one spacer. The total number of lenses with optical power in the lens is seven. All seven lenses and the at least one spacer are disposed within the lens barrel. Both the object-side and image-side surfaces of the lens barrel are planar. The seven lenses, from the object side to the image side, are sequentially composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; The first lens has negative optical power, with both its object-side and image-side surfaces being concave; the second lens has positive optical power, with both its object-side and image-side surfaces being convex; the third lens has positive optical power, with both its object-side and image-side surfaces being convex; the fourth lens has negative optical power, with both its object-side and image-side surfaces being convex; the fifth lens has positive optical power, with both its object-side and image-side surfaces being convex; the sixth lens has positive optical power, with both its object-side and image-side surfaces being convex; and the seventh lens has negative optical power, with both its object-side and image-side surfaces being convex. The at least one spacer includes a fourth spacer, which is located between the fourth lens and the fifth lens and contacts the image-side portion of the fourth lens; The maximum field of view (Semi-FOV) of the optical lens and the maximum height (L) of the lens barrel satisfy the following condition: 0.5 < TAN(Semi-FOV) / L < 0.7; The radius of curvature R8 of the image side of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object side of the fourth spacer satisfy the following condition: 1.45 < R8 * N4 / d4s < 1.

7.

2. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface portion of the first lens. The effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d1m of the image side of the first spacer satisfy the following condition: 6.5 < f2 * N2 / d1m < 6.

7.

3. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The distance EP01 between the object-side end face of the lens barrel and the first spacer, the maximum thickness CP1 of the first spacer, and the air distance T12 between the first lens and the second lens on the optical axis satisfy the following: 1.0 < (EP01 + CP1) / T12 < 1.

4.

4. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a second spacer and a third spacer, the second spacer being located between the second lens and the third lens and contacting the image-side surface of the second lens, and the third spacer being located between the third lens and the fourth lens and contacting the image-side surface of the third lens. The axial distance SAG31 between the intersection of the object side surface and the optical axis of the third lens and the vertex of the effective radius of the object side surface of the third lens satisfies the following condition with the interval EP23 between the second spacer and the third spacer: 0.2 < SAG31 / EP23 < 0.

5.

5. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a second spacer and a third spacer, the second spacer being located between the second lens and the third lens and contacting the image-side surface of the second lens, and the third spacer being located between the third lens and the fourth lens and contacting the image-side surface of the third lens. The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP2 of the second spacer, and the maximum thickness CP3 of the third spacer satisfy the following condition: 3.0 < (T23 + T34) / (CP2 + CP3) < 3.

5.

6. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a first spacer, which is located between the first lens and the second lens and contacts the image-side surface of the first lens. The distance EP01 between the object-side end face of the lens barrel and the first spacer, the outer diameter D1m of the image-side surface of the first spacer, the radius of curvature R1 of the object-side surface of the first lens and the maximum effective radius DT12 of the image-side surface of the first lens satisfy the following: -2.0 < EP01 * D1m / (R1 * CT1) < -1.

2.

7. The optical lens according to claim 1, characterized in that, The axial distance SAG42 between the intersection of the image-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the image-side surface of the fourth lens satisfies the following condition with respect to the maximum thickness CP4 of the fourth spacer: 8.5 < SAG42 / CP4 < 9.

5.

8. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a third spacer, the third spacer being located between the third lens and the fourth lens and contacting the image-side surface portion of the third lens. The central thickness CT4 of the fourth lens on the optical axis, the air gap T34 between the third and fourth lenses on the optical axis, and the gap EP34 between the third and fourth spacers satisfy the following condition: 0.3 < (CT4 + T34) / EP34 < 0.

5.

9. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a fifth spacer, the fifth spacer being located between the fifth lens and the sixth lens and contacting the image-side surface portion of the fifth lens. The inner diameter d4s of the object side of the fourth spacer, the inner diameter d5s of the object side of the fifth spacer, the maximum effective radius DT61 of the object side of the sixth lens, and the maximum effective radius DT62 of the image side of the sixth lens satisfy the following condition: -0.4 < (DT61 - DT62) / (d5s - d4s) < -0.

2.

10. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a sixth spacer, which is located between the sixth lens and the seventh lens and contacts the image-side surface portion of the sixth lens. The outer diameter D6s of the object side of the sixth spacer, the effective focal length f6 of the sixth lens, and the refractive index N6 of the sixth lens satisfy the following condition: 1.7 < D6s / (f6*N6) < 2.

2.

11. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a second spacer, the second spacer being located between the second lens and the third lens and in contact with the image-side surface portion of the second lens. The effective focal length f2 of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object side of the second spacer satisfy the following condition: 9.5 < f2 * N2 / d2s < 11.

0.

12. The optical lens according to claim 1, characterized in that, The at least one spacer further includes a sixth spacer, which is located between the sixth lens and the seventh lens and contacts the image-side surface portion of the sixth lens. The outer diameter D6m of the image side of the sixth spacer, the effective focal length f7 of the seventh lens, and the refractive index N7 of the seventh lens satisfy the following condition: -1.6 < D6m / (f7*N7) < -1.3.

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