Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a first group, a second group and a subsequent element which are sequentially arranged along the optical axis direction of the optical lens from an object side to an image side, wherein the first group at least comprises a first lens, a first spacing element and a second lens which are accommodated in a first lens barrel; the curvature radius R2 of the image side face of the first lens and the curvature radius R1 of the object side face of the first lens meet the condition that R2 / R1 is larger than or equal to-17.17 and smaller than or equal to-10.22. And the curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacing element meet the condition that R3 / d1m is more than or equal to-15.86 and less than or equal to-2.88. According to the optical lens, the problem of poor imaging quality caused by the fact that non-imaging light penetrates through the edge of the optical effective diameter area of the second lens to enter a rear system in the optical lens in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens. Background Art

[0002] With the iterative upgrades of smartphone optical lenses, major manufacturers are increasingly demanding the imaging performance of optical lenses.

[0003] At present, the object side of the first lens of some four-element optical lenses has a strong ability to deflect light, causing some non-imaging light to enter the first lens. The first lens converges this part of the non-imaging light, causing the incident angle of this part of the non-imaging light to approach the maximum receiving angle of the optically effective diameter area of the second lens, causing it to pass through the edge of the optically effective diameter area of the second lens, forming stray light and aberrations that interfere with normal imaging and affect the imaging quality of the optical lens.

[0004] That is, in the prior art, the optical lens has the problem that non-imaging light passes through the edge of the optically effective diameter area of the second lens and enters the rear system, resulting in poor imaging quality. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical lens to solve the problem in the prior art that non-imaging light passes through the edge of the optical effective diameter area of the second lens and enters the rear system, resulting in poor imaging quality.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, an optical lens is provided, which is composed of four lenses. The optical lens includes a first group, a second group, and a subsequent element arranged sequentially from the object side to the image side along the optical axis of the optical lens, the first group includes only two lenses, the second group includes only two lenses, and the subsequent element is a reflective element or a transmissive element; the first group includes a first lens barrel and a first lens, a first spacer element, and a second lens accommodated in the first lens barrel, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22; the curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacer element satisfy the following relationship: -15.86≤R3 / d1m≤-2.88.

[0007] According to another aspect of the present invention, an optical lens is provided, which is composed of four lenses. The optical lens includes a first group, a second group, and a subsequent element arranged sequentially from the object side to the image side along the optical axis of the optical lens, the first group includes only two lenses, the second group includes only two lenses, and the subsequent element is a reflective element or a transmissive element; the first group includes a first lens barrel and a first lens, a first spacer element, and a second lens accommodated in the first lens barrel, the first lens having positive optical power, the first spacer element being located between the first lens and the second lens and partially in contact with the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22; the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 between the object side end surface of the first lens barrel and the object side surface of the first spacer element along the optical axis satisfy the following relationship: 1.73≤f1 / (CT1+EP101)≤2.13.

[0008] According to another aspect of the present invention, an optical lens is provided, which is composed of four lenses. The optical lens includes a first group, a second group, and a reflective element, which are arranged sequentially from the object side to the image side along the optical axis of the optical lens, wherein the first group includes only two lenses, and the second group includes only two lenses. The first group includes a first lens barrel and a first lens, a first spacer element, and a second lens accommodated in the first lens barrel. The first spacer element is located between the first lens and the second lens and contacts the image side surface of the first lens. The curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22. The curvature radius R2 of the image side surface of the first lens, the inner diameter d1s of the object side surface of the first spacer element, and the inner diameter d10s of the object side end surface of the first lens barrel satisfy the following relationship: -1.65 mm. -1 ≤R2 / d1s / d10s≤-1.06mm -1 .

[0009] Furthermore, the spacing distance EP101 between the object side end face of the first lens barrel and the object side face of the first spacing element along the optical axis, and the on-axis distance SAG11 between the intersection of the object side face of the first lens and the optical axis of the optical lens and the effective radius vertex of the object side face of the first lens satisfy the following conditions: 1.66≤EP101 / SAG11≤2.11.

[0010] Furthermore, an air gap T12 between the image-side surface of the first lens and the object-side surface of the second lens on the optical axis of the optical lens and a maximum thickness CP1 of the first spacer element along the optical axis satisfy the following relationship: 2.42≤T12 / CP1≤6.12.

[0011] Furthermore, the first lens has positive refractive power, the second lens has positive refractive power, and the maximum height L10 of the first lens barrel and the combined focal length f12 of the first lens and the second lens satisfy: 1.80≤f12 / L10≤2.45.

[0012] Furthermore, the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 between the object-side end surface of the first lens barrel and the object-side surface of the first spacing element along the optical axis satisfy the following relationship: 1.73≤f1 / (CT1+EP101)≤2.13.

[0013] Furthermore, the curvature radius R1 of the object side surface of the first lens, the outer diameter D10s of the object side end surface of the first lens barrel, and the inner diameter d10s of the object side end surface of the first lens barrel satisfy the following relationship: 4.14≤R1 / (D10s-d10s)≤14.52.

[0014] Furthermore, a curvature radius R2 of the image-side surface of the first lens, an outer diameter D1s of the object-side surface of the first spacer element, and an inner diameter d1s of the object-side surface of the first spacer element satisfy the following relationship: -36.67≤R2 / (D1s-d1s)≤-21.09.

[0015] Furthermore, the second group includes a second lens barrel and a third lens, a third spacer element and a fourth lens accommodated in the second lens barrel. The third spacer element is located between the third lens and the fourth lens and contacts the image side surface of the third lens. The second group can move along the optical axis.

[0016] Furthermore, the curvature radius R4 of the image-side surface of the second lens, the inner diameter d20s of the object-side end surface of the second lens barrel, and the refractive index N2 of the second lens satisfy the following relationship: -10.41≤R4×N2 / d20s≤-4.04.

[0017] Furthermore, the center thickness CT3 of the third lens on the optical axis of the optical lens, the refractive index N3 of the third lens, and the spacing distance EP203 between the object side end surface of the second lens barrel and the object side surface of the third spacer element along the optical axis satisfy the following relationship: 0.60≤CT3×N3 / EP203≤1.00.

[0018] Furthermore, the third lens has negative optical power, the image side surface of the third lens is concave, and the curvature radius R6 of the image side surface of the third lens and the effective focal length f3 of the third lens satisfy: -2.66≤R6 / f3≤-0.59.

[0019] Furthermore, the outer diameter D20m of the image side end surface of the second lens barrel, the inner diameter d20m of the image side end surface of the second lens barrel, the outer diameter D3s of the object side surface of the third spacer element, and the inner diameter d3s of the object side surface of the third spacer element satisfy the following relationship: 0.14≤(D20m-d20m) / (D3s-d3s)≤1.50.

[0020] Furthermore, the maximum height L20 of the second lens barrel, the on-axis distance SAG32 between the intersection of the image side surface of the third lens and the optical axis of the optical lens and the effective radius vertex of the image side surface of the third lens, and the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens satisfy the following: 1.61≤L20 / (SAG32+SAG41)≤4.24.

[0021] Furthermore, the object-side surface of the fourth lens is a convex surface, and a curvature radius R8 of the image-side surface of the fourth lens and a curvature radius R7 of the object-side surface of the fourth lens satisfy: 0.86≤|R8 / R7|≤1.67.

[0022] Furthermore, the third lens has negative power, and the combined focal length f34 of the third lens and the fourth lens and the maximum height L20 of the second lens barrel satisfy the following relationship: -5.36≤f34 / L20≤-3.12.

[0023] Furthermore, the reflective element is an isosceles trapezoidal prism.

[0024] Furthermore, the optical lens satisfies at least one of the following conditions: the reflective element is an isosceles trapezoidal prism; and the reflective element has a microstructure.

[0025] According to the technical solution of the present invention, an optical lens is composed of four lenses, including a first group, a second group, and a subsequent element arranged in sequence from the object side to the image side along the optical axis of the optical lens, wherein the first group includes only two lenses, the second group includes only two lenses, and the subsequent element is a reflective element or a transmissive element. The first group includes a first lens barrel, and a first lens, a first spacer element, and a second lens accommodated in the first lens barrel. The first spacer element is located between the first lens and the second lens and contacts the image side surface of the first lens. The curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22. The curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacer element satisfy the following relationship: -15.86≤R3 / d1m≤-2.88.

[0026] The optical lens of the present application is composed of a first group, a second group and a reflective element, and satisfies -17.17≤R2 / R1≤-10.22. It can be seen that the object side of the first lens has a strong deflection ability for light, resulting in some non-imaging light entering the first lens, and the first lens converges this part of light, resulting in the incident angle of this part of non-imaging light being close to the maximum receiving angle of the optical effective diameter area of the second lens, thereby causing the non-imaging light to pass through the edge of the optical effective diameter area of the second lens, forming stray light and aberrations that interfere with normal imaging, affecting the imaging quality of the optical lens. Based on this, the present application constrains the ratio of the curvature radius R3 of the object side of the second lens to the inner diameter d1m of the image side of the first spacer element within a reasonable range, adjusts the curvature radius of the object side of the second lens and the inner diameter of the first spacer element appropriately, and ensures the refractive power of the object side of the second lens while enabling the first spacer element to effectively intercept the non-imaging light entering the edge of the optical effective diameter area of the second lens, avoiding the risk of non-imaging light further forming stray light, thereby ensuring the imaging quality of the optical lens. In other words, the optical lens of the present application effectively improves the imaging quality of the optical lens by constraining R3 / d1m within a reasonable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 A dimensioned diagram of an optical lens according to an optional embodiment of the present invention is shown;

[0029] Figure 2 A structural diagram of an optical lens according to an optional embodiment of the present invention is shown;

[0030] Figure 3 and Figure 4 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 1-1 of the present invention are respectively shown;

[0031] Figure 5 and Figure 6 Schematic diagrams of the partial structures of the optical lens in the telephoto state and the macro state of Embodiments 1-2 of the present invention are respectively shown;

[0032] Figure 7 、 Figure 8 、 Figure 9 and Figure 10 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 1 of the present invention in the telephoto state are respectively shown;

[0033] Figure 11 、 Figure 12 、 Figure 13 and Figure 14 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 1 of the present invention in the macro state are respectively shown;

[0034] Figure 15 and Figure 16 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 2-1 of the present invention are respectively shown;

[0035] Figure 17 and Figure 18 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 2-2 of the present invention are respectively shown;

[0036] Figure 19 、 Figure 20 、 Figure 21 and Figure 22 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 2 of the present invention in the telephoto state are respectively shown;

[0037] Figure 23 、 Figure 24 、 Figure 25 and Figure 26 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 2 of the present invention in the macro state are respectively shown;

[0038] Figure 27 and Figure 28 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 3-1 of the present invention are respectively shown;

[0039] Figure 29 and Figure 30 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 3-2 of the present invention are respectively shown;

[0040] Figure 31 、 Figure 32 、 Figure 33 and Figure 34 The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical lens of Example 3 of the present invention in the telephoto state are respectively shown;

[0041] Figure 35 、 Figure 36 、 Figure 37 and Figure 38The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 3 of the present invention in the macro state are respectively shown;

[0042] Figure 39 and Figure 40 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 4-1 of the present invention are respectively shown;

[0043] Figure 41 and Figure 42 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 4-2 of the present invention are respectively shown;

[0044] Figure 43 、 Figure 44 、 Figure 45 and Figure 46 The axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical lens of Example 4 of the present invention in the telephoto state are respectively shown;

[0045] Figure 47 、 Figure 48 、 Figure 49 and Figure 50 The axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical lens of Example 4 of the present invention in the macro state are respectively shown;

[0046] Figure 51 and Figure 52 The optical path diagram and stray light spot diagram of an optical lens according to an optional embodiment of the present invention are respectively shown;

[0047] Figure 53 and Figure 54 The optical path diagram and stray light spot diagram of an example optical lens are shown respectively;

[0048] Figure 55 and Figure 56 The optical path diagram and stray light spot diagram of another example of an optical lens are respectively shown.

[0049] The above drawings include the following reference numerals:

[0050] D1, first group; D2, second group; D3, reflecting element; P10, first lens barrel; P20, second lens barrel; E1, first lens; P1, first spacing element; E2, second lens; E3, third lens; P3, third spacing element; E4, fourth lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; S6, object-side surface of the third lens; S7, image-side surface of the third lens; S8, object-side surface of the fourth lens; S9, image-side surface of the fourth lens. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] 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 ordinary technicians in the technical field to which this application belongs.

[0053] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0054] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0055] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0056] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0057] In order to solve the problem in the prior art that non-imaging light passes through the edge of the optical effective diameter area of the second lens and enters the rear system, resulting in poor imaging quality, the present invention provides an optical lens.

[0058] like Figures 1 to 52 As shown, the optical lens is composed of four lenses, and the optical lens includes a first group D1, a second group D2, and a subsequent element arranged in sequence from the object side to the image side along the optical axis of the optical lens. The first group D1 includes only two lenses, the second group D2 includes only two lenses, and the subsequent element is a reflective element D3; the first group D1 includes a first lens barrel and a first lens, a first spacer element, and a second lens accommodated in the first lens barrel, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following: -17.17≤R2 / R1≤-10.22; the curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacer element satisfy the following: -15.86≤R3 / d1m≤-2.88.

[0059] The optical lens of the present application is composed of a first group D1, a second group D2 and a reflective element D3, and satisfies -17.17≤R2 / R1≤-10.22. It can be seen that the object side of the first lens has a strong deflection ability for light, resulting in some non-imaging light entering the first lens. The first lens converges this part of light, resulting in the incident angle of this part of non-imaging light being close to the maximum receiving angle of the optical effective diameter area of the second lens, thereby causing the non-imaging light to pass through the edge of the optical effective diameter area of the second lens, forming stray light and aberrations that interfere with normal imaging, affecting the imaging quality of the optical lens. Based on this, the present application constrains the ratio of the curvature radius R3 of the object side of the second lens to the inner diameter d1m of the image side of the first spacer element within a reasonable range, adjusts the curvature radius of the object side of the second lens and the inner diameter of the first spacer element appropriately, and ensures the refractive power of the object side of the second lens while enabling the first spacer element to effectively intercept the non-imaging light entering the edge of the optical effective diameter area of the second lens, avoiding the risk of non-imaging light further forming stray light, thereby ensuring the imaging quality of the optical lens. In other words, the optical lens of the present application effectively improves the imaging quality of the optical lens by constraining R3 / d1m within a reasonable range.

[0060] Optionally, the reflective element D3 can be replaced with a parallel flat plate, which facilitates the design of the optical lens. Specifically, the reflective element D3 and the vignetting stop thereafter can be replaced with a parallel flat plate.

[0061] Alternatively, the subsequent element may be a transmissive element, such as a parallel plate.

[0062] In addition, reference Figures 51 to 56 As shown, under the premise that the optical lens satisfies -17.17≤R2 / R1≤-10.22, for example, R2 / R1=-17.17, Figure 51 and Figure 52 The optical path diagram and stray light spot diagram of an optical lens of an optional embodiment of the present invention are respectively shown. Specifically, the optical lens in this embodiment satisfies R3 / d1m=-2.93. This embodiment is hereinafter referred to as Solution 1. Figure 53 and Figure 54 An optical path diagram and a stray light spot diagram of an example optical lens are shown respectively. Specifically, the optical lens in this example satisfies R3 / d1m=-16.30. This example is hereinafter referred to as Example 1. Figure 55 and Figure 56 The optical path diagram and stray light spot diagram of another example optical lens are respectively shown. Specifically, the optical lens in this example satisfies R3 / d1m=-2.66. This example is hereinafter referred to as Example 2.

[0063] like Figure 51As shown, when the optical lens satisfies R3 / d1m=-2.93, the inner diameter of the first spacer element is set reasonably, so that the first spacer element can intercept the non-imaging light entering the edge of the optical effective diameter area of the second lens. Figure 52 As shown, there are very few stray light spots on the imaging surface of the optical lens, indicating that the optical lens of Solution 1 performs better.

[0064] like Figure 53 As shown in the figure, when the optical lens satisfies R3 / d1m=-16.30, the inner diameter of the first spacer element is small, which makes the radial length of the first spacer element too long, and the imaging light used for imaging is excessively intercepted. At this time, part of the imaging light is completely blocked, and the other part bypasses the first spacer element based on diffraction theory and continues to propagate, forming diffraction stray light. Figure 54 As shown, the stray light spot on the imaging surface of the optical lens is serious, indicating that the optical lens of Example 1 performs poorly.

[0065] like Figure 55 As shown, when the optical lens satisfies R3 / d1m=-2.66, the inner diameter of the first spacer element is large, which makes the radial length of the first spacer element too short, and the non-imaging light from the first lens can completely pass through the second lens, resulting in light leakage. Figure 56 As shown, there are many stray light spots on the imaging surface of the optical lens, indicating that the optical lens of Example 2 performs poorly.

[0066] In summary, if Figures 51 to 56 As shown, when the optical lens satisfies -17.17≤R2 / R1≤-10.22 and ensures that R3 / d1m is within the range of -15.86 to -2.88, there are very few stray light spots on the imaging surface of the optical lens, and the imaging quality is the best, indicating that the optical lens of Example 1 performs the best. Therefore, the present application constrains R2 / R1 and R3 / d1m within a reasonable range, adjusts the curvature radius of the object side of the second lens and the inner diameter of the first spacer element appropriately, and while ensuring the refractive power of the object side of the second lens, enables the first spacer element to effectively intercept non-imaging light entering the edge of the optical effective diameter area of the second lens, avoiding the risk of non-imaging light further forming stray light, thereby ensuring the imaging quality of the optical lens. In other words, the optical lens of the present application effectively improves the imaging quality of the optical lens by constraining R3 / d1m within a reasonable range.

[0067] It should be noted that this application constrains R3 / d1m within a reasonable range, which can effectively avoid light leakage and thus ensure the imaging quality of the optical lens. This does not rely on the optical power and surface shape of other lenses, which are further optimizations of the optical lens based on this. The other lenses can be positive or negative according to the actual design requirements of the optical lens, and the surface shape of each lens can also be convex or concave according to the design requirements of the optical lens. The imaging quality of the optical lens can be guaranteed when the following conditions are met: -17.17≤R2 / R1≤-10.22; -15.86≤R3 / d1m≤-2.88.

[0068] For example, in some optional embodiments, the first lens has positive optical power, which can effectively converge light and ensure that the light can be focused after entering the first lens. For another example, in some optional embodiments, the second lens has positive optical power, which further enhances the convergence effect of light. For another example, in some optional embodiments, the third lens has negative optical power, which balances the aberrations caused by the front group of lenses and accurately images the light. For another example, in some optional embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is convex. The object side surface of the second lens is concave, and the image side surface of the second lens is convex. The image side surface of the third lens is concave. The object side surface of the fourth lens is convex. By reasonably constraining the surface shape of each lens, it is beneficial to reasonably constrain the trend of light, ensure a smooth transition of light, and correct aberrations.

[0069] In some optional embodiments, the spacing distance EP101 between the object-side end face of the first lens barrel and the object-side face of the first spacer element along the optical axis, and the on-axis distance SAG11 between the intersection of the object-side face of the first lens and the optical axis of the optical lens and the vertex of the effective radius of the object-side face of the first lens satisfy the following relationship: 1.66≤EP101 / SAG11≤2.11. EP101 determines the reserved dimension between the object-side end face of the first lens barrel and the first spacer element, while SAG11 reflects the degree of convexity of the object-side face of the first lens toward the object side. Therefore, by controlling the ratio of EP101 / SAG11 within a reasonable range, not only can the first lens barrel have sufficient structural strength, but also the optically effective diameter of the first lens maintains an appropriate gap with the object-side end of the first lens barrel during assembly, preventing excessive contact and thereby avoiding appearance risks such as scratches caused by the convexity of the first lens. In addition, constraining the above formula within a reasonable range can also ensure the uniformity of the surface shape of the first lens, help improve the processability of the first lens, and thus reduce the molding risk of the first lens.

[0070] In some optional embodiments, the air gap T12 between the image-side surface of the first lens and the object-side surface of the second lens on the optical axis of the optical lens and the maximum thickness CP1 of the first spacer element along the optical axis satisfy the following relationship: 2.42 ≤ T12 / CP1 ≤ 6.12. Since the distance between the first and second lenses in the first group D1 is relatively small, it is necessary to set T12 / CP1 within a reasonable range to more rationally control the minimum distance between the first and second lenses and the thickness of the first spacer element, thereby avoiding poor optical performance caused by contact between the first and second lenses during assembly. Furthermore, constraining the above equation within a reasonable range can prevent baking deformation caused by an excessively thin thickness of the first spacer element, reduce the risk of light leakage, and prevent stray light caused by an excessively thick first spacer element. Specifically, it reduces stray light caused by excessive reflection or scattering of light off the inner annular surface of the first spacer element, thereby improving the imaging quality of the optical lens.

[0071] In some optional embodiments, the first lens has positive optical power, the second lens has positive optical power, and the maximum height L10 of the first lens barrel and the combined focal length f12 of the first and second lenses satisfy the following relationship: 1.80 ≤ f12 / L10 ≤ 2.45. Setting f12 / L10 within a reasonable range not only helps optimize the trajectory and path of light within the first lens group D1, but also limits the size of the first lens barrel along the optical axis, achieving miniaturization of the optical lens. Furthermore, controlling the value of f12 / L10 can prevent collisions between the first lens group D1 and the second lens group D2 during assembly or use of the optical lens, thereby preventing any impact on the optical lens.

[0072] In some optional embodiments, the first lens has positive focal power, and the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 between the object-side end face of the first lens barrel and the object-side face of the first spacer element along the optical axis satisfy the following conditions: 1.73≤f1 / (CT1+EP101)≤2.13. By setting f1 / (CT1+EP101) within a reasonable range, it helps to control the effective focal length and surface uniformity of the first lens, improve the molding yield of the first lens, and ensure that the path of light passing through the first lens is more gentle, thereby adjusting the focus position of the light on the surface of the second lens after passing through the first lens, reducing the risk of stray light of the optical lens, and ensuring the imaging quality of the optical lens. In addition, this also helps to maintain an appropriate gap between the first lens and the object-side end of the first lens barrel during the assembly process, avoiding scratches and other appearance problems caused by excessive contact, thereby ensuring good processing performance of the first lens while ensuring the assembly stability of the first lens.

[0073] In some optional embodiments, the radius of curvature R1 of the object-side surface of the first lens, the outer diameter D10s of the object-side end surface of the first lens barrel, and the inner diameter d10s of the object-side end surface of the first lens barrel satisfy the following relationship: 4.14≤R1 / (D10s-d10s)≤14.52. By setting R1 / (D10s-d10s) within a reasonable range, the radial thickness of the object-side end surface of the first lens barrel can be more reasonably designed, thereby increasing the assembly support width of the object-side end of the first lens barrel, ensuring stability and reliability during assembly, and helping the first lens maintain good optical performance.

[0074] In some optional embodiments, the radius of curvature R2 of the image-side surface of the first lens, the outer diameter D1s of the object-side surface of the first spacer element, and the inner diameter d1s of the object-side surface of the first spacer element satisfy the following relationship: -36.67 ≤ R2 / (D1s - d1s) ≤ -21.09. Setting R2 / (D1s - d1s) within a reasonable range helps control the shape of the optically effective diameter region of the first lens, thereby controlling the radial dimensions of the first lens within a reasonable range. This also ensures that the first lens has a sufficient flange width (i.e., the radial length of the structural portion of the first lens), improves the processing feasibility of the first lens and the fit between the first lens and the first spacer element, thereby enhancing the stability of the assembly between the first lens and the first spacer element.

[0075] In some optional embodiments, the second group D2 includes a second lens barrel, a third lens housed within the second lens barrel, a third spacer element, and a fourth lens. The third spacer element is positioned between the third and fourth lenses and partially contacts the image-side surface of the third lens. The second group D2 is movable along the optical axis. By combining the third and fourth lenses within the second group D2, the light path can be effectively adjusted, enabling the optical lens to meet the requirements of a large image surface. Furthermore, the third spacer element effectively mitigates unnecessary stray light, enhancing the structural stability and reliability of the optical lens. The ability of the second group D2 to move along the optical axis ensures that the optical lens achieves the optimal imaging point in both telephoto and macro modes, significantly enriching the imaging characteristics of the optical lens.

[0076] In some optional embodiments, the image-side surface of the second lens is convex, and the curvature radius R4 of the image-side surface of the second lens, the inner diameter d20s of the object-side end surface of the second lens barrel, and the refractive index N2 of the second lens satisfy the following relationship: -10.41 ≤ R4 × N2 / d20s ≤ -4.04. Setting R4 × N2 / d20s within a reasonable range helps optimize the surface shape of the second lens and its ability to control light, allowing effective light to smoothly transition from the second lens of the first group D1 to the second group D2, reducing energy loss and aberrations in the optical path. This improves the processability of the second lens while maintaining its optical performance. Furthermore, it helps limit the aperture size of the second group D2, reducing the volume and weight of the entire optical lens, thereby facilitating miniaturization of the optical lens.

[0077] In some optional embodiments, the central thickness CT3 of the third lens on the optical axis of the optical lens, the refractive index N3 of the third lens, and the separation distance EP203 between the object-side end surface of the second lens barrel and the object-side surface of the third spacer element along the optical axis satisfy the following relationship: 0.60 ≤ CT3 × N3 / EP203 ≤ 1.00. By setting CT3 × N3 / EP203 within a reasonable range, the surface shape of the third lens and the light path through the third lens are ensured to be more reasonable, thereby improving the manufacturing feasibility of the third lens. At the same time, the position of the object-side end surface of the second group D2 is controlled, avoiding collision problems caused by an excessively small distance between the first group D1 and the second group D2.

[0078] In some optional embodiments, the third lens element has negative optical power, the image-side surface of the third lens element is concave, and the radius of curvature R6 of the image-side surface of the third lens element and the effective focal length f3 of the third lens element satisfy the following relationship: -2.66 ≤ R6 / f3 ≤ -0.59. By constraining the ratio R6 / f3 to be between -2.66 and -0.59, the refraction angle of light passing through the third lens element can be controlled, reducing the degree of light deflection in the third lens element, thereby reducing light deviation (such as spherical aberration) caused by refractive error, ultimately reducing the sensitivity of the third lens element and improving the imaging quality of the optical lens element.

[0079] In some optional embodiments, the outer diameter D20m of the image-side end surface of the second lens barrel, the inner diameter d20m of the image-side end surface of the second lens barrel, the outer diameter D3s of the object-side surface of the third spacer element, and the inner diameter d3s of the object-side surface of the third spacer element satisfy the following relationship: 0.14≤(D20m-d20m) / (D3s-d3s)≤1.50. By setting (D20m-d20m) / (D3s-d3s) within a reasonable range, the annular width ratio between the object-side surface of the second lens barrel and the object-side surface of the third spacer element is constrained, which not only helps to improve the molding strength and processability of the second lens barrel, but also helps to optimize the size and position of the third spacer element, so that the third spacer element blocks stray light from the third lens, thereby improving the imaging quality of the optical lens.

[0080] In some optional embodiments, the maximum height L20 of the second lens barrel, the on-axis distance SAG32 between the intersection of the image-side surface of the third lens and the optical axis of the optical lens and the vertex of the effective radius of the image-side surface of the third lens, and the on-axis distance SAG41 between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens satisfy the following conditions: 1.61≤L20 / (SAG32+SAG41)≤4.24. Setting L20 / (SAG32+SAG41) within a reasonable range not only helps ensure good processability of the third and fourth lenses, but also promotes a more compact second group D2, thereby effectively avoiding the risk of the second group D2 colliding with the first group D1 and the reflective element D3 during movement.

[0081] In some optional embodiments, the object-side surface of the fourth lens is convex, and the radius of curvature R8 of the image-side surface of the fourth lens and the radius of curvature R7 of the object-side surface of the fourth lens satisfy the following relationship: 0.86 ≤ |R8 / R7| ≤ 1.67. By setting |R8 / R7| within a reasonable range, the surface shape of the fourth lens is more rationally controlled, thereby effectively constraining the trajectory of light emitted from the fourth lens of the optical lens, further converging light across multiple wavelengths, reducing chromatic aberration, and ensuring the feasibility of manufacturing the fourth lens, thereby improving the reliability of the optical performance of the optical lens.

[0082] In some optional embodiments, the third lens element has negative refractive power, and the combined focal length f34 of the third and fourth lenses and the maximum height L20 of the second lens barrel satisfy the following relationship: -5.36 ≤ f34 / L20 ≤ -3.12. Setting f34 / L20 within a reasonable range ensures that the third and fourth lenses have excellent refractive properties, ensuring that light is properly transmitted to the imaging surface. This also helps to minimize the size of the second lens group D2 and prevents collisions between the second lens group D2 and the first lens group D1 or the reflective element D3 during movement.

[0083] In some optional embodiments, the distance between the first group D1 and the second group D2 is variable, and the zoom of the optical lens is achieved by changing the distance between the first group D1 and the second group D2.

[0084] In some optional embodiments, such as Figure 2 As shown, the reflective element D3 is a trapezoidal prism. In the optical lens, the reflective element D3 can be a trapezoidal prism. The trapezoidal prism is a three-dimensional structure, located on the image side of the optical lens and returns the light emitted by the fourth lens to the imaging surface. At this time, the light is rotated 180° and received by the inverted imaging chip. The setting of the trapezoidal prism can increase the optical path of the optical lens, while reducing the volume of the optical lens, it is also beneficial to increase the effective focal length range of the optical lens. Specifically, the trapezoidal prism is a three-dimensional isosceles trapezoid, and the surface of the trapezoidal prism can also add microstructures to improve stray light. Among them, the top surface of the trapezoidal prism is located on the side of the bottom surface of the trapezoidal prism away from the second group D2.

[0085] It should be noted that the trapezoidal prism has a top and bottom surface, and four side surfaces connected to the top and bottom surfaces. Light passing through the first group D1 and the second group D2 is coaxial. The central axes of the first and second groups D1 and D2 and the central axis of the imaging plane are both located on the first plane. The trapezoidal prism has two side surfaces parallel to the first plane. The other two side surfaces connected to the top and bottom surfaces of the trapezoidal prism serve as the girdle surfaces of the trapezoidal prism.

[0086] Preferably, the reflective element D3 is an isosceles trapezoidal prism.

[0087] In some optional embodiments, the image height Imgh of the optical lens satisfies: 4.4 mm < Imgh < 4.5 mm, wherein Imgh(inf) represents the image height when the object distance (OBJ) is at infinity, which is also the image height in the telephoto state, and Imgh(200) represents the image height when the object distance (OBJ) is 200 mm, which is also the image height in the macro state.

[0088] In some optional embodiments, the half field of view (HFOV) of the optical lens satisfies the following conditions: 13.65° < HFOV < 14.6°. Here, HFOV(inf) represents the half field of view when the object distance (OBJ) is at infinity, which is also the half field of view in the telephoto state; and HFOV(200) represents the half field of view when the object distance (OBJ) is 200 mm, which is also the half field of view in the macro state.

[0089] In some optional embodiments, the aperture value Fno of the optical lens satisfies: 2.85<Fno<3.0. Wherein, Fno(inf) represents the aperture value when the object distance (OBJ) is at infinity, which is also the aperture value in the telephoto state, and Fno(200) represents the aperture value when the object distance (OBJ) is 200 mm, which is also the aperture value in the macro state.

[0090] In some optional embodiments, the effective focal length f of the optical lens satisfies: 15.4 mm < f < 17.6 mm. Here, f(inf) represents the effective focal length when the object distance (OBJ) is at infinity, which is also the effective focal length in the telephoto state, and f(200) represents the effective focal length when the object distance (OBJ) is 200 mm, which is also the effective focal length in the macro state. The effective focal length f of the optical lens can achieve continuous zoom within the range of 15.4 mm to 17.6 mm.

[0091] On the other hand, in another optional embodiment, an optical lens is provided, which is composed of four lenses. The optical lens includes a first group D1, a second group D2 and a reflective element D3 arranged in sequence from the object side to the image side along the optical axis of the optical lens, the first group D1 includes only two lenses, and the second group D2 includes only two lenses; the first group D1 includes a first lens barrel and a first lens, a first spacer element and a second lens accommodated in the first lens barrel, the first lens has positive optical power, the first spacer element is located between the first lens and the second lens and contacts the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy: -17.17≤R2 / R1≤-10.22; the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 between the object side end face of the first lens barrel and the object side surface of the first spacer element along the optical axis satisfy: 1.73≤f1 / (CT1+EP101)≤2.13.

[0092] The optical lens of the present application is composed of a first group D1, a second group D2 and a reflective element D3, and satisfies -17.17≤R2 / R1≤-10.22. It can be seen that the curvature radius of the object side and the image side of the first lens are quite different. After passing through the first lens, the light is easily incident on the second lens at a steeper angle, which increases the risk of diffraction and stray light at the edge of the second lens, affecting the imaging quality of the optical lens. Based on this, the present application constrains the relationship between the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 along the optical axis between the object side end face of the first lens barrel and the object side face of the first spacing element. This helps to control the effective focal length and surface uniformity of the first lens, improve the molding yield of the first lens, and ensure that the path of the light passing through the first lens is more gentle, thereby adjusting the focus position of the light on the surface of the second lens after passing through the first lens, reducing the risk of stray light in the optical lens, and ensuring the imaging quality of the optical lens. Furthermore, this helps maintain an appropriate gap between the first lens and the object-side end of the first lens barrel during assembly, preventing scratches and other cosmetic issues caused by excessive contact. This ensures both good processing performance and assembly stability of the first lens. In other words, the optical lens of this application effectively improves its imaging quality by constraining f1 / (CT1+EP101) within a reasonable range.

[0093] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0094] On the other hand, in another optional embodiment, an optical lens is provided, which consists of four lenses. The optical lens includes a first group D1, a second group D2 and a reflective element D3 arranged in sequence from the object side to the image side along the optical axis of the optical lens, the first group D1 includes only two lenses, and the second group D2 includes only two lenses; the first group D1 includes a first lens barrel and a first lens, a first spacer element and a second lens accommodated in the first lens barrel, the first spacer element is located between the first lens and the second lens and contacts the image side surface portion of the first lens; the curvature radius R2 of the image side surface of the first lens and the curvature radius R1 of the object side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22; the curvature radius R2 of the image side surface of the first lens, the inner diameter d1s of the object side surface of the first spacer element, and the inner diameter d10s of the object side end surface of the first lens barrel satisfy the following relationship: -1.65mm -1 ≤R2 / d1s / d10s≤-1.06mm -1 .

[0095] The optical lens of the present application is composed of a first group D1, a second group D2 and a reflective element D3, and satisfies -17.17≤R2 / R1≤-10.22. It can be seen that the object side of the first lens has a strong ability to deflect light, causing some non-imaging light to enter the first lens. The first lens converges this part of light, causing the incident angle of this part of non-imaging light to be close to the maximum receiving angle of the optically effective diameter area of the second lens, thereby causing the non-imaging light to pass through the edge of the optically effective diameter area of the second lens, forming stray light and aberrations that interfere with normal imaging, affecting the imaging quality of the optical lens. Based on this, the present application constrains the relationship between the curvature radius R2 of the image side surface of the first lens, the inner diameter d1s of the object side surface of the first spacer element, and the inner diameter d10s of the object side end surface of the first lens barrel. On the basis of ensuring the incident range of the light, it can control the light to obtain appropriate convergence after passing through the image side surface of the first lens, so that the light can smoothly pass through the first spacer element after passing through the first lens. This not only avoids the imaging light from being blocked by the first spacer element, but also prevents the non-imaging light from entering the edge of the optical effective diameter area of the second lens, avoiding the risk of non-imaging light further forming stray light, thereby ensuring the imaging quality of the optical lens. In other words, the optical lens of the present application effectively improves the imaging quality of the optical lens by constraining R2 / d1s / d10s within a reasonable range.

[0096] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0097] Optionally, the optical lens may further include a filter located between the imaging plane and the fourth lens.

[0098] Optionally, the optical lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0099] Optionally, the above-mentioned multiple lenses may have at least one trimmed lens, the outer peripheral surface of the trimmed lens may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens is smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens.

[0100] Optionally, at least one of the plurality of spacer elements may include a trimmed spacer element. The outer circumference of the trimmed spacer element may include a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the trimmed spacer element is smaller than the outer diameter of the non-trimmed portion of the trimmed spacer element. The outer diameter of the spacer element generally refers to the maximum outer diameter of the non-trimmed portion.

[0101] It should be noted that each lens consists of an optically effective diameter region located at the center and an optically structured region located at the edge. The optically structured region is located outside the optically effective diameter region and is arranged circumferentially around the optically effective diameter region. The optically effective diameter region is used for the passage of imaging light, while the optically structured region is not used for the passage of imaging light. The optically structured region is used for contact with the lens barrel, adjacent lenses, or adjacent spacer elements. The optically structured region is also called the non-effective diameter region.

[0102] The optical lens in this application may utilize multiple lenses, such as the four lenses described above. In this application, at least one of the lens surfaces is an aspheric surface. An aspheric lens is characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a better curvature radius characteristic, with the advantages of improving distortion and astigmatism. The use of an aspheric lens can minimize aberrations that occur during imaging, thereby improving image quality.

[0103] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, while the embodiments describe an optical lens using four lenses as an example, the optical lens is not limited to four lenses. If desired, the optical lens can also include other numbers of lenses.

[0104] Figure 1 A schematic diagram of the dimensions of an optical lens of the present application is shown. Figure 1 Parameters such as EP101, EP203, CP1, L10, L20, d1s, d1m, D1s, d3s, D3s, d10s, D10s, d20s, d20m, D20m, SAG11, SAG32, and SAG41 are indicated to provide a clear and intuitive understanding of their significance. To facilitate the description of optical lenses and specific lens profiles, these parameters will not be reflected in the accompanying drawings when describing specific embodiments.

[0105] It should be noted that, in the process of light traveling from the object to the imaging surface, along the direction of light transmission, the object side refers to the side of the optical element that receives light, or in other words, the side of the optical element bounded by the imaging element along the direction of light transmission where the image of the scene to be imaged is located is the object side. The image side refers to the side of the optical element that emits light, or in other words, the side of the optical element bounded by the imaging element along the direction of light transmission where the image of the scene to be imaged is located is the image side. The object-side end face of the lens barrel refers to the surface of the lens barrel located in front of the direction of light transmission and perpendicular to the optical axis. The image-side end face of the lens barrel refers to the surface of the lens barrel located in the rear of the direction of light transmission and perpendicular to the optical axis. The object-side surface of the spacer element refers to the surface of the spacer element that contacts the optical element located in front of it and is perpendicular to the optical axis. The image-side surface of the spacer element refers to the surface of the spacer element that contacts the optical element located behind it and is perpendicular to the optical axis. In the direction of light transmission, between two adjacent optical elements, light first passes through the optical element located in front and then the optical element located behind.

[0106] It should be noted that the "on-axis distance" in the definitions of SAG11, SAG32, and SAG41 specifically refers to the distance along the optical axis, also known as displacement, with positive values along the direction of light transmission and negative values opposite. L10 is the maximum height of the first lens barrel, specifically the distance along the optical axis between the object-side end face of the first lens barrel and the image-side end face of the first lens barrel. L20 is the maximum height of the second lens barrel, specifically the distance along the optical axis between the object-side end face of the second lens barrel and the image-side end face of the second lens barrel.

[0107] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0108] It should be noted that in the following Example 1, there are Examples 1-1 and 1-2; in Example 2, there are Examples 2-1 and 2-2; in Example 3, there are Examples 3-1 and 3-2; and in Example 4, there are Examples 4-1 and 4-2. While the optical lenses of the two examples within the same embodiment have the same parameters such as the radius of curvature, center thickness, and spacing between lenses, as well as the coefficients of higher-order terms, the thickness, inner diameter, and outer diameter of the first and second lens barrels, first and third spacers, and the shapes of some lenses are different. In other words, the main structures for imaging are the same, but the auxiliary structures for imaging are different.

[0109] It should be noted that any of the following embodiments 1 to 4 are applicable to all implementation methods of the present application.

[0110] Example 1

[0111] like Figures 3 to 14As shown, the optical lens of embodiment 1 is described. Figure 3 and Figure 4 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of embodiment 1-1 of the present invention are shown respectively. Figure 5 and Figure 6 Schematic diagrams of the partial structures of the optical lens in the telephoto state and the macro state of embodiments 1-2 of the present invention are respectively shown.

[0112] like Figures 3 to 6 As shown, the optical lens includes a first lens barrel P10, a second lens barrel 20, four lenses and multiple spacer elements. The first lens barrel P10 includes a first lens E1, a first spacer element P1, and a second lens E2 arranged in sequence from the object side to the image side. The second lens barrel P20 includes a third lens E3, a third spacer element P3, and a fourth lens E4 arranged in sequence from the object side to the image side.

[0113] like Figure 3 and Figure 4 FIG. 1 is a partial structural diagram of an optical lens according to Example 1-1. In this embodiment, the object-side surface S1 of the first lens element partially contacts the first lens barrel P0; the object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively; the object-side surface and image-side surface of the third spacer element P3 partially contact the image-side surface S7 of the third lens element and the object-side surface S8 of the fourth lens element, respectively; and the image-side surface S9 of the fourth lens partially contacts the second lens barrel P20.

[0114] like Figure 5 and Figure 6 FIG2 is a partial structural diagram of the optical lens of Example 1-2. The supporting method of each spacer element is the same as that of Example 1-1, and will not be described in detail here.

[0115] It should be noted that, in the telephoto state, Figure 3 and Figure 5 As shown, the object distances of the optical lenses of Examples 1-1 and 1-2 are both infinite. In the macro state, as shown in FIG. Figure 4 and Figure 6 As shown, the object distance of the optical lens of Example 1-1 and Example 1-2 is 200 mm. The optical lens can achieve continuous zoom between the effective focal length in the telephoto state and the effective focal length in the macro state.

[0116] In summary, the structural parameters of the optical lens of Example 1 in Example 1-1 and Example 1-2 are shown in Table 11.

[0117] In Example 1, the first lens E1 has positive power, with its object-side surface S1 being convex, and its image-side surface S2 being convex. The second lens E2 has positive power, with its object-side surface S3 being concave, and its image-side surface S4 being convex. The third lens E3 has negative power, with its object-side surface S6 being concave, and its image-side surface S7 being concave. The fourth lens E4 has positive power, with its object-side surface S8 being convex, and its image-side surface S9 being concave.

[0118] In Table 1 below, OBJ (not shown in the figure) is the object plane of the optical lens, and STO (not shown in the figure) is the aperture, which is located on the first lens E1.

[0119] Table 1 shows the basic structural parameters of the optical lens of Example 1, where the units of curvature radius and thickness are both in millimeters (mm). Positive numbers in thickness represent the distance from the object side to the image side, and negative numbers represent the distance from the image side to the object side.

[0120]

[0121] Table 1

[0122] It should be noted that the trapezoidal prism and vignetting stop S12 in Table 1 above can be replaced with parallel plates. For data after replacing the trapezoidal prism and vignetting stop S12 in Table 1 with parallel plates, please refer to Table 2. The data in Table 1 and Table 2 are interchangeable. The basic structural parameter tables in Examples 2, 3, and 4 below all refer to data for parallel plates. Specific data for the trapezoidal prism is not presented in Examples 2 through 4.

[0123] In Table 2 below, OBJ (not shown) represents the object plane of the optical lens, the thickness of object plane OBJ (not shown) represents the object distance, and STO (not shown) represents the aperture stop, located on the first lens element E1. S5 (not shown) represents the virtual point of the first lens group D1, ensuring that the distance from the image side surface of the second lens element to the virtual point of the first lens group D1 remains constant. S10 (not shown) represents the virtual point of the second lens group D2, ensuring that the distance from the image side surface of the fourth lens element to the virtual point of the second lens group D2 remains constant. This design maintains a certain gap behind the first lens group D1 and the second lens group D2 to meet the requirements of zoom movement of the second lens group D2. S11 and S12 (not shown) represent the object side and image side surfaces of parallel plates. S13 and S14 (not shown) can be the object side and image side surfaces of a filter or protective glass, and S15 (not shown) represents the imaging surface of the optical lens. In other words, light from the object plane passes through S1 to S14 to reach the imaging surface S15 (not shown).

[0124] Table 2 shows the basic structural parameters of the optical lens of Example 1, where the units of the radius of curvature and thickness are both in millimeters (mm). Positive numbers in thickness represent the distance from the object side to the image side, while negative numbers represent the distance from the image side to the object side. The thickness data corresponding to surface numbers S5 and S10 change with changes in object distance, while the thickness data corresponding to other surface numbers do not change with changes in object distance.

[0125]

[0126] Table 2

[0127] In Example 1, the object-side surface and the image-side surface of the first lens E1 to the fourth lens E4 are all aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0128]

[0129] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 3 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric mirror surfaces S1-S4, S6-S9 in Example 1.

[0130] Face number A4 A6 A8 A10 A12 A14 A16 S1 -4.25E-02 -1.13E-02 -6.73E-03 -2.20E-03 -7.53E-04 -2.31E-04 -2.60E-05 S2 7.75E-02 -9.29E-03 -1.92E-03 -3.83E-03 1.09E-03 -7.16E-04 8.02E-04 S3 5.22E-02 2.00E-02 8.24E-03 -4.10E-03 1.93E-03 -8.07E-04 8.44E-04 S4 1.05E-01 2.96E-02 5.93E-03 7.82E-05 6.51E-04 -8.83E-05 1.08E-04 S6 2.68E-01 -4.50E-02 7.56E-03 -6.51E-05 -7.47E-04 5.07E-04 -1.42E-04 S7 2.25E-01 -3.98E-02 2.07E-03 1.09E-03 -9.50E-04 2.29E-05 5.51E-04 S8 7.62E-02 -3.93E-02 4.83E-03 -1.47E-03 2.45E-04 -4.79E-04 6.80E-04 S9 -5.36E-02 -1.23E-02 1.80E-03 -8.49E-04 3.14E-04 -2.04E-04 1.53E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.42E-05 1.15E-05 2.09E-06 1.69E-06 0.00E+00 0.00E+00 0.00E+00 S2 -1.32E-04 -4.09E-05 3.86E-06 -4.43E-07 0.00E+00 0.00E+00 0.00E+00 S3 -1.32E-04 -6.83E-05 4.80E-05 -2.56E-05 0.00E+00 0.00E+00 0.00E+00 S4 1.42E-05 -4.46E-05 3.04E-05 -1.94E-05 0.00E+00 0.00E+00 0.00E+00 S6 -6.91E-05 1.37E-04 -1.05E-04 5.91E-05 -2.93E-05 6.48E-06 0.00E+00 S7 -7.18E-04 5.50E-04 -2.78E-04 9.76E-05 -2.63E-05 4.01E-06 0.00E+00 S8 -6.74E-04 4.99E-04 -2.30E-04 7.04E-05 -2.49E-05 5.80E-06 0.00E+00 S9 -1.21E-04 8.66E-05 -2.32E-05 -5.56E-06 3.01E-06 -1.59E-07 0.00E+00

[0131] Table 3

[0132] Figure 7 The axial chromatic aberration curve of the optical lens of Example 1 in the telephoto state is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 8 The astigmatism curve of the optical lens of Example 1 in the telephoto state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 9 The distortion curve of the optical lens of Example 1 in the telephoto state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 10 The chromatic aberration curve of the optical lens of Example 1 in the telephoto state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0133] Figure 11 The axial chromatic aberration curve of the optical lens of Example 1 in the macro state is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 12The astigmatism curve of the optical lens of Example 1 in the macro state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 13 The distortion curve of the optical lens of Example 1 in the macro state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 14 The chromatic aberration curve of the optical lens of Example 1 in the macro state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0134] according to Figures 7 to 14 It can be seen that the optical lens provided in Example 1 can achieve good imaging quality.

[0135] Example 2

[0136] like Figures 15 to 26 As shown, the optical lens of the second embodiment is described. Figure 15 and Figure 16 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of embodiment 2-1 of the present invention are shown respectively. Figure 17 and Figure 18 A partial structural schematic diagram of the optical lens in embodiment 2-2 of the present invention in a telephoto state and a partial structural schematic diagram of the optical lens in a macro state are respectively shown.

[0137] like Figures 15 to 18 As shown, the optical lens includes a first lens barrel P10, a second lens barrel 20, four lenses and multiple spacer elements. The first lens barrel P10 includes a first lens E1, a first spacer element P1, and a second lens E2 arranged in sequence from the object side to the image side. The second lens barrel P20 includes a third lens E3, a third spacer element P3, and a fourth lens E4 arranged in sequence from the object side to the image side.

[0138] like Figure 15 and Figure 16 FIG2 is a partial structural diagram of an optical lens according to Example 2-1. In this embodiment, the object-side surface S1 of the first lens element partially contacts the first lens barrel P0; the object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively; the object-side surface and image-side surface of the third spacer element P3 partially contact the image-side surface S7 of the third lens element and the object-side surface S8 of the fourth lens element, respectively; and the image-side surface S9 of the fourth lens partially contacts the second lens barrel P20.

[0139] like Figure 17 and Figure 18 FIG2 is a partial structural diagram of the optical lens of Example 2-2. The supporting method of each spacer element is the same as that of Example 2-1, and will not be described in detail here.

[0140] It should be noted that, in the telephoto state, Figure 15 and Figure 17 As shown, the object distance of the optical lens of Example 2-1 and Example 2-2 is infinite. In the macro state, as shown in FIG. Figure 16 and Figure 18 As shown, the object distance of the optical lens of Example 2-1 and Example 2-2 is 200 mm. The optical lens can achieve continuous zoom between the effective focal length in the telephoto state and the effective focal length in the macro state.

[0141] In summary, the structural parameters of the optical lens of Example 2 in Example 2-1 and Example 2-2 are shown in Table 11.

[0142] In Example 2, the first lens E1 has positive focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is convex. The second lens E2 has positive focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The third lens E3 has negative focal power, the object-side surface S6 of the third lens is concave, and the image-side surface S7 of the third lens is concave. The fourth lens E4 has negative focal power, the object-side surface S8 of the fourth lens is convex, and the image-side surface S9 of the fourth lens is concave. In Table 4, OBJ (not shown) is the object plane of the optical lens, the thickness of object plane OBJ (not shown) is the object distance, and STO (not shown) is the aperture stop, which is located on the first lens E1. S5 (not shown in the figure) is the virtual point position of the first group D1, which ensures that the distance from the image side surface of the second lens to the virtual point position of the first group D1 remains unchanged. S10 (not shown in the figure) is the virtual point position of the second group D2, which ensures that the distance from the image side surface of the fourth lens to the virtual point position of the second group D2 remains unchanged. This design is conducive to maintaining a certain gap behind the first group D1 and the second group D2 to meet the needs of mobile zoom of the second group D2. S11 and S12 (not shown in the figure) are the object side surface and image side surface of the parallel plate. S13 and S14 (not shown in the figure) can be the object side surface and image side surface of the filter or protective glass. S15 (not shown in the figure) is the imaging surface of the optical lens. In other words, the light from the object surface passes through S1 to S14 to reach the imaging surface S15 (not shown in the figure).

[0143] Table 4 shows the basic structural parameters of the optical lens of Example 2, where the units of the radius of curvature and thickness are both in millimeters (mm). Positive numbers in thickness represent the distance from the object side to the image side, while negative numbers represent the distance from the image side to the object side. The thickness data corresponding to surface numbers S5 and S10 change with changes in object distance, while the thickness data corresponding to other surface numbers do not change with changes in object distance.

[0144]

[0145] Table 5 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1-S4, S6-S9 in Example 2. The surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0146]

[0147]

[0148] Table 5

[0149] Figure 19 The axial chromatic aberration curve of the optical lens of Example 2 in the telephoto state is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 20 The astigmatism curve of the optical lens of Example 2 in the telephoto state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 21 The distortion curve of the optical lens of Example 2 in the telephoto state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 22 The chromatic aberration curve of the optical lens of Example 2 in the telephoto state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0150] Figure 23 The axial chromatic aberration curve of the optical lens of Example 2 in the macro state is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Figure 24 The astigmatism curve of the optical lens of Example 2 in the macro state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 25 The distortion curve of the optical lens of Example 2 in the macro state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 26 The chromatic aberration curve of the optical lens of Example 2 in the macro state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0151] according to Figures 19 to 26 It can be seen that the optical lens provided in the second embodiment can achieve good imaging quality.

[0152] Example 3

[0153] like Figures 27 to 38 As shown, the optical lens of embodiment 3 is described. Figure 27 and Figure 28 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 3-1 of the present invention are respectively shown. Figure 29 and Figure 30 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of embodiment 3-2 of the present invention are respectively shown.

[0154] like Figures 27 to 30 As shown, the optical lens includes a first lens barrel P10, a second lens barrel 20, four lenses and multiple spacer elements. The first lens barrel P10 includes a first lens E1, a first spacer element P1, and a second lens E2 arranged in sequence from the object side to the image side. The second lens barrel P20 includes a third lens E3, a third spacer element P3, and a fourth lens E4 arranged in sequence from the object side to the image side.

[0155] like Figure 27 and Figure 28 FIG3 is a partial structural diagram of an optical lens according to Example 3-1. In this embodiment, the object-side surface S1 of the first lens element partially contacts the first lens barrel P0; the object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively; the object-side surface and image-side surface of the third spacer element P3 partially contact the image-side surface S7 of the third lens element and the object-side surface S8 of the fourth lens element, respectively; and the image-side surface S9 of the fourth lens partially contacts the second lens barrel P20.

[0156] like Figure 29 and Figure 30 FIG3 is a partial structural diagram of the optical lens of Example 3-2. The supporting method of each spacer element is the same as that of Example 3-1, and will not be described in detail here.

[0157] It should be noted that, in the telephoto state, Figure 27 and Figure 29 As shown, the object distance of the optical lens of Example 3-1 and Example 3-2 is infinite. In the macro state, as shown in FIG. Figure 28 and Figure 30 As shown, the object distance of the optical lens of Example 3-1 and Example 3-2 is 200 mm. The optical lens can achieve continuous zoom between the effective focal length in the telephoto state and the effective focal length in the macro state.

[0158] In summary, the structural parameters of the optical lens of Example 3 in Example 3-1 and Example 3-2 are shown in Table 11.

[0159] In Example 3, the first lens E1 has positive focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is convex. The second lens E2 has positive focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The third lens E3 has negative focal power, the object-side surface S6 of the third lens is convex, and the image-side surface S7 of the third lens is concave. The fourth lens E4 has positive focal power, the object-side surface S8 of the fourth lens is convex, and the image-side surface S9 of the fourth lens is concave. Among them, OBJ (not shown in the figure) in Table 6 is the object plane of the optical lens, the thickness of the object plane OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture, which is located on the first lens E1. S5 (not shown in the figure) is the virtual point position of the first group D1, which ensures that the distance from the image side surface of the second lens to the virtual point position of the first group D1 remains unchanged. S10 (not shown in the figure) is the virtual point position of the second group D2, which ensures that the distance from the image side surface of the fourth lens to the virtual point position of the second group D2 remains unchanged. This design is conducive to maintaining a certain gap behind the first group D1 and the second group D2 to meet the needs of mobile zoom of the second group D2. S11 and S12 (not shown in the figure) are the object side surface and image side surface of the parallel plate. S13 and S14 (not shown in the figure) can be the object side surface and image side surface of the filter or protective glass. S15 (not shown in the figure) is the imaging surface of the optical lens. In other words, the light from the object surface passes through S1 to S14 to reach the imaging surface S15 (not shown in the figure).

[0160] Table 6 shows the basic structural parameters of the optical lens of Example 3, where the units of the radius of curvature and thickness are both in millimeters (mm). Positive numbers in thickness represent the distance from the object side to the image side, while negative numbers represent the distance from the image side to the object side. The thickness data corresponding to surface numbers S5 and S10 change with changes in object distance, while the thickness data corresponding to other surface numbers do not change with changes in object distance.

[0161]

[0162] Table 6

[0163] Table 7 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1-S4, S6-S9 in Example 3. The surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0164] Face number A4 A6 A8 A10 A12 A14 A16 S1 -9.08E-02 -2.52E-02 -7.66E-03 -2.12E-03 -3.94E-04 -9.12E-05 2.02E-06 S2 5.70E-02 -2.51E-02 -4.04E-03 -1.69E-03 1.82E-03 -3.35E-04 -1.25E-04 S3 1.07E-01 2.39E-02 5.94E-05 -7.45E-04 1.24E-03 -2.02E-04 -1.41E-04 S4 1.95E-01 2.83E-02 3.35E-03 9.26E-04 6.12E-05 2.90E-05 -5.88E-05 S6 3.35E-01 -6.38E-02 1.86E-02 -7.09E-03 3.58E-03 -1.53E-03 9.53E-04 S7 1.99E-01 -1.14E-01 9.91E-03 -1.94E-02 3.10E-03 -3.96E-03 1.20E-03 S8 3.02E-02 -8.54E-02 1.50E-02 -1.49E-02 3.12E-03 -2.66E-03 1.10E-03 S9 -1.50E-01 -2.90E-02 5.51E-03 -3.88E-03 1.48E-03 -5.18E-04 3.76E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 -2.18E-06 1.22E-05 -9.61E-07 -1.26E-10 0.00E+00 0.00E+00 0.00E+00 S2 1.61E-04 -1.22E-04 -3.35E-05 4.98E-05 0.00E+00 0.00E+00 0.00E+00 S3 1.93E-04 -1.66E-04 -9.82E-06 1.61E-05 0.00E+00 0.00E+00 0.00E+00 S4 2.53E-05 -5.55E-05 -2.57E-06 -1.65E-05 0.00E+00 0.00E+00 0.00E+00 S6 -5.19E-04 2.58E-04 -1.45E-04 4.89E-05 -2.67E-05 9.06E-06 0.00E+00 S7 -1.11E-03 3.38E-04 -2.42E-04 7.00E-05 -3.01E-05 -4.05E-06 0.00E+00 S8 -7.08E-04 3.02E-04 -1.39E-04 8.51E-05 -2.26E-06 1.46E-06 0.00E+00 S9 -2.06E-04 1.03E-04 -4.59E-05 3.39E-05 -8.57E-06 -6.13E-07 0.00E+00

[0165] Table 7

[0166] Figure 31The axial chromatic aberration curve of the optical lens of Example 3 in the telephoto state is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 32 The astigmatism curve of the optical lens of Example 3 in the telephoto state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 33 The distortion curve of the optical lens of Example 3 in the telephoto state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 34 The chromatic aberration curve of the optical lens of Example 3 in the telephoto state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0167] Figure 35 The axial chromatic aberration curve of the optical lens of Example 3 in the macro state is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Figure 36 The astigmatism curve of the optical lens of Example 3 in the macro state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 37 The distortion curve of the optical lens of Example 3 in the macro state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 38 The chromatic aberration curve of the optical lens of Example 3 in the macro state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0168] according to Figures 31 to 38 It can be seen that the optical lens provided in Example 3 can achieve good imaging quality.

[0169] Example 4

[0170] like Figures 39 to 50 As shown, the optical lens of embodiment 4 is described. Figure 39 and Figure 40 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 4-1 of the present invention are shown respectively. Figure 41 and Figure 42 Schematic diagrams of the partial structure of the optical lens in telephoto state and macro state of Example 4-2 of the present invention are respectively shown.

[0171] like Figures 39 to 42 As shown, the optical lens includes a first lens barrel P10, a second lens barrel 20, four lenses and multiple spacer elements. The first lens barrel P10 includes a first lens E1, a first spacer element P1, and a second lens E2 arranged in sequence from the object side to the image side. The second lens barrel P20 includes a third lens E3, a third spacer element P3, and a fourth lens E4 arranged in sequence from the object side to the image side.

[0172] like Figure 39 and Figure 40 FIG4 is a partial structural diagram of an optical lens according to Example 4-1. In this embodiment, the object-side surface S1 of the first lens element partially contacts the first lens barrel P0; the object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively; the object-side surface and image-side surface of the third spacer element P3 partially contact the image-side surface S7 of the third lens element and the object-side surface S8 of the fourth lens element, respectively; and the image-side surface S9 of the fourth lens partially contacts the second lens barrel P20.

[0173] like Figure 41 and Figure 42 FIG4 is a partial structural diagram of the optical lens of Example 4-2. The supporting method of each spacer element is the same as that of Example 4-1, and will not be described in detail here.

[0174] It should be noted that, in the telephoto state, Figure 39 and Figure 41 As shown, the object distance of the optical lens of Example 4-1 and Example 4-2 is infinite. In the macro state, as shown in FIG. Figure 40 and Figure 42 As shown, the object distance of the optical lens of Example 4-1 and Example 4-2 is 200 mm. The optical lens can achieve continuous zoom between the effective focal length in the telephoto state and the effective focal length in the macro state.

[0175] In summary, the structural parameters of the optical lens of Example 4 in Example 4-1 and Example 4-2 are shown in Table 11.

[0176] In Example 4, the first lens E1 has positive focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is convex. The second lens E2 has positive focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The third lens E3 has negative focal power, the object-side surface S6 of the third lens is concave, and the image-side surface S7 of the third lens is concave. The fourth lens E4 has positive focal power, the object-side surface S8 of the fourth lens is convex, and the image-side surface S9 of the fourth lens is convex. In Table 8, OBJ (not shown) is the object plane of the optical lens, the thickness of object plane OBJ (not shown) is the object distance, and STO (not shown) is the aperture stop, which is located on the first lens E1. S5 (not shown in the figure) is the virtual point position of the first group D1, which ensures that the distance from the image side surface of the second lens to the virtual point position of the first group D1 remains unchanged. S10 (not shown in the figure) is the virtual point position of the second group D2, which ensures that the distance from the image side surface of the fourth lens to the virtual point position of the second group D2 remains unchanged. This design is conducive to maintaining a certain gap behind the first group D1 and the second group D2 to meet the needs of mobile zoom of the second group D2. S11 and S12 (not shown in the figure) are the object side surface and image side surface of the parallel plate. S13 and S14 (not shown in the figure) can be the object side surface and image side surface of the filter or protective glass. S15 (not shown in the figure) is the imaging surface of the optical lens. In other words, the light from the object surface passes through S1 to S14 to reach the imaging surface S15 (not shown in the figure).

[0177] Table 8 shows the basic structural parameters of the optical lens of Example 4, where the units of the radius of curvature and thickness are both in millimeters (mm). Positive numbers in thickness represent the distance from the object side to the image side, while negative numbers represent the distance from the image side to the object side. The thickness data corresponding to surface numbers S5 and S10 change with changes in object distance, while the thickness data corresponding to other surface numbers do not change with changes in object distance.

[0178]

[0179]

[0180] Table 8

[0181] Table 9 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1-S4, S6-S9 in Example 4. The surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0182] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.26E-02 -2.73E-02 -9.51E-03 -3.80E-03 -1.01E-03 -2.66E-04 -2.90E-05 S2 9.99E-02 -1.65E-02 -6.62E-03 -2.81E-04 4.88E-04 4.55E-04 -3.41E-04 S3 1.03E-01 3.67E-02 -1.62E-03 2.84E-03 -2.28E-04 7.46E-04 -4.16E-04 S4 1.14E-01 4.19E-02 4.26E-04 3.86E-03 -7.44E-04 6.71E-04 -3.12E-04 S6 2.41E-01 -4.75E-02 1.17E-02 -2.90E-03 8.88E-04 2.17E-04 -2.84E-04 S7 3.34E-01 -7.07E-02 7.19E-03 -6.21E-03 5.44E-04 -7.23E-05 -2.17E-04 S8 4.29E-02 -4.13E-02 -7.83E-04 -5.11E-03 1.32E-04 -2.91E-04 -1.66E-06 S9 -6.43E-02 -3.22E-02 -4.81E-04 -2.42E-03 5.94E-04 -1.65E-04 7.67E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.36E-05 2.36E-05 3.20E-06 -1.65E-06 0.00E+00 0.00E+00 0.00E+00 S2 4.76E-04 -4.52E-04 1.80E-04 -1.97E-05 0.00E+00 0.00E+00 0.00E+00 S3 5.26E-04 -4.55E-04 1.73E-04 -4.86E-05 0.00E+00 0.00E+00 0.00E+00 S4 2.02E-04 -1.64E-04 6.23E-05 -3.80E-05 0.00E+00 0.00E+00 0.00E+00 S6 2.26E-04 -1.80E-04 1.11E-04 -6.86E-05 2.05E-05 -1.31E-06 0.00E+00 S7 6.55E-05 -9.14E-05 6.09E-05 -1.47E-05 -6.02E-07 -4.33E-06 0.00E+00 S8 -5.09E-05 -1.69E-05 2.18E-05 1.80E-05 9.15E-06 -4.86E-06 0.00E+00 S9 -6.01E-05 1.43E-05 1.27E-06 1.25E-05 -4.84E-06 3.14E-07 0.00E+00

[0183] Figure 43The axial chromatic aberration curve of the optical lens of Example 4 in the telephoto state is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens. Figure 44 The astigmatism curve of the optical lens of Example 4 in the telephoto state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 45 The distortion curve of the optical lens of Example 4 in the telephoto state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 46 The chromatic aberration curve of the optical lens of Example 4 in the telephoto state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0184] Figure 47 The axial chromatic aberration curve of the optical lens of Example 4 in the macro state is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Figure 48 The astigmatism curve of the optical lens of Example 4 in the macro state is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 49 The distortion curve of the optical lens of Example 4 in the macro state is shown, which represents the distortion magnitude values corresponding to different image heights. Figure 50 The chromatic aberration curve of the optical lens of Example 4 in the macro state is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0185] according to Figures 43 to 50 It can be seen that the optical lens provided in Example 4 can achieve good imaging quality.

[0186] In summary, the optical lenses of Examples 1 to 4 respectively satisfy the relationships shown in Table 10.

[0187] Conditional formula / Example 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 R3 / d1m -10.24 -10.32 -4.11 -4.08 -2.93 -2.88 -15.60 -15.86 EP101 / SAG11 1.67 1.72 1.79 1.70 2.11 2.03 1.66 1.77 T12 / CP1 6.12 4.08 6.05 4.84 5.94 4.75 3.33 2.42 f12 / L10 1.99 1.97 2.45 2.31 2.01 2.15 1.80 1.90 f34 / L20 -3.64 -3.44 -4.34 -5.36 -5.04 -5.01 -3.55 -3.12 f1 / (CT1+EP101) 2.01 1.97 2.07 2.13 1.76 1.80 1.79 1.74 R2 / R1 -14.98 -14.98 -10.22 -10.22 -17.17 -17.17 -13.84 -13.84 R1 / (D10s-d10s) 6.15 6.47 8.75 14.52 4.14 4.14 7.27 7.18 R2 / (D1s-d1s) -30.08 -36.67 -22.89 -25.00 -27.23 -25.00 -27.73 -21.09 R4×N2 / d20s -4.65 -4.75 -5.82 -5.15 -4.05 -5.36 -7.42 -10.41 CT3×N3 / EP203 0.60 0.63 0.75 1.00 0.82 0.72 0.65 0.60 R6 / f3 -1.24 -1.24 -2.66 -2.66 -0.59 -0.59 -1.40 -1.40 (D20m-d20m) / (D3s-d3s) 1.28 1.47 1.50 1.16 1.28 0.14 1.25 0.18 L20 / (SAG32+SAG41) 1.71 1.81 2.57 2.08 1.61 1.62 3.73 4.24 |R8 / R7| 1.18 1.18 0.86 0.86 0.93 0.93 1.67 1.67 <![CDATA[R2 / d1s / d10s(mm -1 )]]> -1.45 -1.50 -1.06 -1.06 -1.65 -1.55 -1.25 -1.18

[0188] Table 10

[0189] Table 11 shows some parameters of the optical lenses of Examples 1 to 4 (HFOV in degrees, Fno dimensionless, and other parameters in mm). Wherein, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f12 is the combined focal length of the first and second lenses, and f34 is the combined focal length of the third and fourth lenses. The parameters with (inf) and (200) in Table 11 change with changes in object distance, while the other parameters without (inf) and (200) do not change with changes in object distance. That is, in Table 11, ImgH, FOV, Fno, and f change with changes in object distance, while the data of other parameters remain unchanged.

[0190]

[0191]

[0192] Table 11

[0193] The present application also provides an imaging device, wherein the electronic photosensitive element thereof may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0194] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0195] It should be noted that the terms used herein are only for describing specific embodiments and are not intended 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, tasks, devices, components and / or combinations thereof.

[0196] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0197] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that: The optical lens is composed of four lenses, and the optical lens includes a first group, a second group, and a subsequent element arranged in sequence from the object side to the image side along the optical axis of the optical lens, the first group includes only two lenses, the second group includes only two lenses, and the subsequent element is a reflective element or a transmissive element; The first group includes a first lens barrel, and a first lens, a first spacer element, and a second lens housed in the first lens barrel, wherein the first spacer element is located between the first lens and the second lens and contacts the image side surface portion of the first lens; The curvature radius R2 of the image-side surface of the first lens and the curvature radius R1 of the object-side surface of the first lens satisfy the following relationship: -17.17≤R2 / R1≤-10.22; A curvature radius R3 of the object-side surface of the second lens and an inner diameter d1m of the image-side surface of the first spacer element satisfy the following: -15.86≤R3 / d1m≤-2.

88.

2. The optical lens according to claim 1, wherein: The spacing distance EP101 between the object side end face of the first lens barrel and the object side face of the first spacing element along the optical axis, and the on-axis distance SAG11 between the intersection of the object side face of the first lens and the optical axis of the optical lens and the effective radius vertex of the object side face of the first lens satisfy the following: 1.66≤EP101 / SAG11≤2.

11.

3. The optical lens according to claim 1, wherein: An air gap T12 between the image side surface of the first lens and the object side surface of the second lens on the optical axis of the optical lens and a maximum thickness CP1 of the first spacer element along the optical axis satisfy the following: 2.42≤T12 / CP1≤6.

12.

4. The optical lens according to claim 1, wherein: The first lens has positive refractive power, the second lens has positive refractive power, and the maximum height L10 of the first lens barrel and the combined focal length f12 of the first lens and the second lens satisfy the following: 1.80≤f12 / L10≤2.

45.

5. The optical lens according to claim 1, wherein: The effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis of the optical lens, and the spacing distance EP101 between the object side end face of the first lens barrel and the object side face of the first spacer element along the optical axis satisfy the following: 1.73≤f1 / (CT1+EP101)≤2.

13.

6. The optical lens according to claim 1, wherein: The curvature radius R1 of the object-side surface of the first lens, the outer diameter D10s of the object-side end surface of the first lens barrel, and the inner diameter d10s of the object-side end surface of the first lens barrel satisfy the following relationship: 4.14≤R1 / (D10s-d10s)≤14.

52.

7. The optical lens according to claim 1, wherein: The curvature radius R2 of the image-side surface of the first lens, the outer diameter D1s of the object-side surface of the first spacer element, and the inner diameter d1s of the object-side surface of the first spacer element satisfy the following conditions: -36.67≤R2 / (D1s-d1s)≤-21.

09.

8. The optical lens according to claim 1, wherein: The second group includes a second lens barrel and a third lens, a third spacer element and a fourth lens accommodated in the second lens barrel. The third spacer element is located between the third lens and the fourth lens and contacts the image-side surface of the third lens. The second group is movable along the optical axis.

9. The optical lens according to claim 8, wherein: The curvature radius R4 of the image-side surface of the second lens, the inner diameter d20s of the object-side end surface of the second lens barrel, and the refractive index N2 of the second lens satisfy the following: -10.41≤R4×N2 / d20s≤-4.

04.

10. The optical lens according to claim 8, wherein: The center thickness CT3 of the third lens on the optical axis of the optical lens, the refractive index N3 of the third lens, and the spacing distance EP203 between the object side end face of the second lens barrel and the object side face of the third spacer element along the optical axis satisfy the following: 0.60≤CT3×N3 / EP203≤1.00.

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