Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, and a lens group and a spacing assembly which are accommodated in the lens barrel; the lens group comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis; the center thickness of the second lens is larger than the center thickness of other lenses in the lens group, and the maximum thickness of a non-light-transmitting area of the second lens is larger than the maximum thickness of non-light-transmitting areas of other lenses. The spacing assembly comprises a second spacing element, a third spacing element, a fourth spacing element and a fifth spacing element; the optical lens satisfies the following conditions: 1.60 < L / (f * tan (Semi-FOV)) < 1.95; (CT2 + CT4) / CT3 is more than 5.55 and less than 7.50; 5.90 < = D5s / d2slt; 7.00 and 6.70 < EP02 / EP23 < 8.65.

Description

Technical Field

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

[0002] In recent years, the rapid development of smartphones, automotive cameras, security surveillance, and other fields has necessitated the pursuit of high pixel count, wide angles, and miniaturization in optical lenses, while also balancing image quality and structural reliability. In particular, balancing the contradictions between field of view, overall lens length, and optical performance in ultra-wide-angle lens design has become a technical challenge for the industry.

[0003] To balance field of view, overall lens length, and optical performance, some optical lenses currently on the market achieve superior optical performance while meeting ultra-wide-angle and miniaturization requirements by designing the spacing between lens elements and constraining key lens parameters. These lenses are widely used in applications such as mobile phones and drones, where both size and image quality are crucial. However, the thicker lenses in these types of lenses can easily cause axial and radial deformation of the rear lens, compromising the stability of the lens assembly. Summary of the Invention

[0004] One advantage of the present application is that it provides an optical lens that can solve the problem of excessive thickness of the lens and the impact on the assembly stability of the optical lens caused by balancing the field of view angle, total lens length and optical performance in traditional optical lenses.

[0005] On the one hand, the present application provides an optical lens, comprising a lens barrel and a lens group and a spacer assembly housed in the lens barrel; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power; the center thickness of the second lens is greater than the center thickness of the other lenses in the lens group, and the maximum thickness of the non-light-transmitting area of ​​the second lens is greater than the maximum thickness of the non-light-transmitting area of ​​the other lenses; the spacer assembly includes a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the optical lens satisfies:

[0006] 1.60<L / (f×tan(Semi-FOV))<1.95;

[0007] 5.55<(CT2+CT4) / CT3<7.50;

[0008] 5.90≤D5s / d2s<7.00; and

[0009] 6.70<EP02 / EP23<8.65;

[0010] Wherein, L is the maximum height of the lens barrel, f is the effective focal length of the optical lens, Semi-FOV is half of the maximum field of view of the optical lens, CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, CT4 is the center thickness of the fourth lens, D5s is the outer diameter of the object side surface of the fifth spacer element, d2s is the inner diameter of the object side surface of the second spacer element, EP02 is the distance from the object side end surface of the lens barrel to the object side surface of the second spacer element along the optical axis, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis.

[0011] In some embodiments of the present application, the optical lens satisfies:

[0012] 0.21≤CT2 / L≤0.25;

[0013] Wherein, CT2 is the center thickness of the second lens, and L is the maximum height of the lens barrel.

[0014] In some embodiments of the present application, the optical lens satisfies:

[0015] 4.00<d0s / d2s<4.55;

[0016] Wherein, d0s is the inner diameter of the object side surface of the lens barrel, and d2s is the inner diameter of the object side surface of the second spacer element.

[0017] In some embodiments of the present application, the optical lens satisfies:

[0018] 3.05<d0smin / d2m<3.50;

[0019] Wherein, d0smin is the minimum aperture of the object side end of the lens barrel, and d2m is the inner diameter of the image side surface of the second spacer element.

[0020] In some embodiments of the present application, the optical lens satisfies:

[0021] 3.50<D3s / d2m<5.55;

[0022] Wherein, D3s is the outer diameter of the object-side surface of the third spacer element, and d2m is the inner diameter of the image-side surface of the second spacer element.

[0023] In some embodiments of the present application, the optical lens satisfies:

[0024] 2.36≤CT2 / (CT1+CT3)≤2.94; and

[0025] 4.85<EP02 / T12<7.20;

[0026] Wherein, CT2 is the center thickness of the second lens, CT1 is the center thickness of the first lens, CT3 is the center thickness of the third lens, EP02 is the distance from the object-side end face of the lens barrel to the object-side face of the second spacer element along the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0027] In some embodiments of the present application, the optical lens satisfies:

[0028] 2.10≤DT21 / DT22<2.45; and

[0029] 1.30<(R3+R4) / D2s<2.75;

[0030] Among them, DT21 is the effective radius of the object side of the second lens, DT22 is the effective radius of the image side of the second lens, R3 is the curvature radius of the object side of the second lens, R4 is the curvature radius of the image side of the second lens, and D2s is the outer diameter of the object side of the second spacer element.

[0031] In some embodiments of the present application, the optical lens satisfies:

[0032] 3.00≤D3s / d3m<4.70; and

[0033] 3.30≤D4s / d4s<3.75;

[0034] Wherein, D3s is the outer diameter of the object-side surface of the third spacer element, d3m is the inner diameter of the image-side surface of the third spacer element, D4s is the outer diameter of the object-side surface of the fourth spacer element, and d4s is the inner diameter of the object-side surface of the fourth spacer element.

[0035] In some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies:

[0036] 1.60<|f6 / R12|<2.55; and

[0037] 2.80<EP56 / CT6<3.55;

[0038] Among them, f6 is the effective focal length of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, EP56 is the spacing distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0039] In some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies:

[0040] 1.00<D6s / D5m<1.10; and 1.10<d6s / d5m<1.55;

[0041] Wherein, D6s is the outer diameter of the object-side surface of the sixth spacer element, D5m is the outer diameter of the image-side surface of the fifth spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and d5m is the inner diameter of the image-side surface of the fifth spacer element.

[0042] In some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image-side surface of the sixth lens, and a seventh spacer element disposed on the image side of the seventh lens and in contact with the image-side surface of the seventh lens, and the optical lens satisfies:

[0043] 1.95<D7s / d6m<2.40;

[0044] Wherein, D7s is the outer diameter of the object-side surface of the seventh spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element.

[0045] In some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies:

[0046] 21.50<(D6m-d6s) / (CP6×10)<26.50;

[0047] Wherein, D6m is the outer diameter of the image-side surface of the sixth spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0048] In some embodiments of the present application, the optical lens satisfies:

[0049] 0.90<f4 / f5<1.60; and

[0050] 0.65<(d5s-d4m) / EP45<0.95;

[0051] Among them, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side surface of the fifth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis.

[0052] In some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies:

[0053] 2.10≤d0m / d6s≤2.55; and

[0054] 21.50<(D6m-d6s) / (CP6×10)<26.50;

[0055] Wherein, d0m is the inner diameter of the image side end surface of the lens barrel, d6s is the inner diameter of the object side surface of the sixth spacer element, D6m is the outer diameter of the image side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0056] The optical lens of the present application is a seven-element ultra-wide-angle optical lens, wherein the barrel height, effective focal length, and half of the maximum field of view of the optical lens satisfy the relationship 1.60<L / (f×tan(Semi-FOV))<1.95, and the center thicknesses of the second lens, the third lens, and the fourth lens satisfy the relationship 5.55<(CT2+CT4) / CT3<7.50, and the center thickness of the second lens and the maximum thickness of the non-light-transmitting area are greater than the center thickness and the thickness of the non-light-transmitting area of ​​other lenses in the lens group, which will result in greater structural rigidity of the second lens, and the third lens directly adjacent to the second lens and the fifth lens affected by the front stress will both be deformed. To this end, the present application improves the deformation problem caused by the stress effect of the second lens on the third lens and the fifth lens by constraining the ratio of the outer diameter of the object side of the fifth spacer element to the inner diameter of the object side of the second spacer element, the spacing between the object side of the barrel and the object side of the second spacer element on the optical axis, and the ratio of the air gap between the first lens and the second lens on the optical axis. By using the ratio of the inner and outer diameters of the fifth spacer element to the second spacer element, the distances in the radial direction between the force points of the bearing surfaces of the second lens to the fifth lens are basically consistent. When the assembly force is applied to the lens, the axial edge pressure distribution can be uniform, and the displacement difference between the center and the non-light-transmitting area of ​​the third lens and the fifth lens can be controlled to be relatively small. The ratio of EP02 / EP23 in the axial direction is further used to limit the thickness of the non-light-transmitting area of ​​the lens in front of the third lens and the maximum thickness of the non-light-transmitting area of ​​the third lens, so that the center and edge of the third lens remain basically horizontal in the direction of the optical axis, thereby ensuring that the stress on the edge of the third lens is not too large when it is under pressure, and no large deformation will occur to cause the lens to break, thereby increasing the stability of the lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a schematic diagram of structural parameters of an optical lens according to one embodiment of the present application;

[0058] Figure 2 is a schematic structural diagram of an optical lens according to one embodiment of the present application;

[0059] Figure 3 is a schematic structural diagram of an optical lens according to the first embodiment of the present application;

[0060] Figure 4 is a schematic structural diagram of an optical lens according to the second embodiment of the present application;

[0061] Figure 5 is a schematic structural diagram of an optical lens according to embodiment 3 of the present application;

[0062] Figure 6ASchematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0063] Figure 6B Schematic diagrams of astigmatism curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0064] Figure 7 is a schematic structural diagram of an optical lens according to a fourth embodiment of the present application;

[0065] Figure 8 is a schematic structural diagram of an optical lens according to embodiment 5 of the present application;

[0066] Figure 9 is a schematic structural diagram of an optical lens according to Example 6 of the present application;

[0067] Figure 10A Schematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0068] Figure 10B Schematic diagrams of astigmatism curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0069] Figure 11 is a schematic structural diagram of an optical lens according to embodiment 7 of the present application;

[0070] Figure 12 is a schematic structural diagram of an optical lens according to Example 8 of the present application;

[0071] Figure 13 is a schematic structural diagram of an optical lens according to Example 9 of the present application;

[0072] Figure 14A Schematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0073] Figure 14B Schematic diagrams of astigmatism curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0074] Figure 15A An assembly deformation diagram of the optical lens of the first example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=4.45, and EP02 / EP23=6.65 is satisfied;

[0075] Figure 15B An assembly stress diagram of the third lens of the optical lens of the first example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=4.45, and EP02 / EP23=6.65 is satisfied;

[0076] Figure 16A An assembly deformation diagram of the optical lens of the second example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=6.02, and EP02 / EP23=8.45 is satisfied;

[0077] Figure 16B An assembly stress diagram of the third lens of the optical lens of the second example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=6.02, and EP02 / EP23=8.45 are satisfied;

[0078] Figure 17A An assembly deformation diagram of the optical lens of the third example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=7.72, and EP02 / EP23=15.84 are satisfied;

[0079] Figure 17B An assembly stress diagram of the third lens of the optical lens of the third example is shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=7.72, and EP02 / EP23=15.84 are satisfied. DETAILED DESCRIPTION

[0080] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0081] 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.

[0082] 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.

[0083] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it indicates that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it indicates that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to common methods in the art, for example, by determining whether it is concave or convex based on the positive or negative R value (R refers to the radius of curvature of the paraxial region). In this document, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, a positive R value indicates a convex surface, and a negative R value indicates a concave surface. For the image-side surface, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0084] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0085] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0086] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following examples only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent of this application. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0087] According to one aspect of this application, Figure 1 and Figure 2 As shown, the present application provides an optical lens, comprising a lens barrel and a lens group and a spacer assembly housed in the lens barrel; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens with negative optical focal length, a second lens with positive optical focal length, a third lens with positive optical focal length, a fourth lens with positive optical focal length, a fifth lens with positive optical focal length, a sixth lens with negative optical focal length and a seventh lens with negative optical focal length; the center thickness of the second lens is greater than the center thickness of other lenses in the lens group, and the maximum thickness of the non-light-transmitting area of ​​the second lens is greater than the maximum thickness of the non-light-transmitting area of ​​other lenses; the spacer assembly comprises a second spacer element placed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element placed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element placed on the image side of the fifth lens and in contact with the image side surface of the fifth lens.

[0088] In particular, the optical lens satisfies: 1.60<L / (f×tan(Semi-FOV))<1.95; 5.55<(CT2+CT4) / CT3<7.50; 5.90≤D5s / d2s<7.00; and 6.70<EP02 / EP23<8.65; wherein, L is the maximum height of the lens barrel, f is the effective focal length of the optical lens, Semi-FOV is half of the maximum field of view of the optical lens, CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, CT4 is the center thickness of the fourth lens, D5s is the outer diameter of the object side surface of the fifth spacer element, d2s is the inner diameter of the object side surface of the second spacer element, EP02 is the distance from the object side end surface of the lens barrel to the object side surface of the second spacer element along the optical axis, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis.

[0089] It is worth noting that the optical lens in the above-mentioned embodiment of the present application is a seven-element ultra-wide-angle optical lens, and the barrel height, effective focal length, and half of the maximum field of view of the optical lens satisfy the relationship 1.60<L / (f×tan(Semi-FOV))<1.95. At the same time, the center thicknesses of the second lens, the third lens, and the fourth lens satisfy the relationship 5.55<(CT2+CT4) / CT3<7.50, and the center thickness of the second lens and the maximum thickness of the non-light-transmitting area are greater than the center thickness and the thickness of the non-light-transmitting area of ​​other lenses in the lens group, which will cause the structural rigidity of the second lens to be greater, and the third lens directly adjacent to the second lens and the fifth lens affected by the front stress will both be deformed. To this end, the present application improves the deformation problem caused by the stress effect of the second lens on the third lens and the fifth lens by constraining the ratio of the outer diameter of the object side of the fifth spacer element to the inner diameter of the object side of the second spacer element, the spacing between the object side of the barrel and the object side of the second spacer element on the optical axis, and the ratio of the air gap between the first lens and the second lens on the optical axis. By using the ratio of the inner and outer diameters of the fifth spacer element to the second spacer element, the distances in the radial direction between the force points of the bearing surfaces of the second lens to the fifth lens are basically consistent. When the assembly force is applied to the lens, the axial edge pressure distribution can be uniform, and the displacement difference between the center and the non-light-transmitting area of ​​the third lens and the fifth lens can be controlled to be relatively small. The ratio of EP02 / EP23 in the axial direction is further used to limit the thickness of the non-light-transmitting area of ​​the lens in front of the third lens and the maximum thickness of the non-light-transmitting area of ​​the third lens, so that the center and edge of the third lens remain basically horizontal in the direction of the optical axis, thereby ensuring that the stress on the edge of the third lens is not too large when it is under pressure, and no large deformation will occur to cause the lens to break, thereby increasing the stability of the lens assembly.

[0090] In addition, the object-side surface S1 and the image-side surface S2 of the first lens E1 are both concave; the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are concave and convex, respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are both convex; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave, respectively; and the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are convex and concave, respectively.

[0091] For example, Figure 15A and Figure 15B The assembly deformation diagram and the assembly stress diagram of the third lens of the optical lens of the first example are respectively shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=4.45, and EP02 / EP23=6.65; Figure 16Aand Figure 16B The assembly deformation diagram and the assembly stress diagram of the third lens of the second example are respectively shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=6.02, and EP02 / EP23=8.45; Figure 17A and Figure 17B The assembly deformation diagram and the assembly stress diagram of the third lens of the third example are respectively shown when L / (f×tan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=7.72 and EP02 / EP23=15.84. As can be seen from the figure, Figure 15A As shown in Table 1, when D5s / d2s=4.45, it can be seen that the displacement difference between the center and the edge of the third lens and the fifth lens is larger than that of the optical lens of the second example, that is, the deformation of the third lens and the fifth lens is larger, and the assembly stability of the lens is poor. Figure 15B As shown in the figure, when EP02 / EP23=6.65, the step difference between the center and the edge of the third lens is large, the deformation during assembly is large, the stress on the edge of the third lens is large, and there is a risk of the third lens being broken. Figure 16A As shown in Table 1, when D5s / d2s=6.02, it can be seen that the displacement difference between the center and the edge of the third lens and the fifth lens is smaller than that of the optical lens of the first example and the optical lens of the third example, that is, the deformation amount of the third lens and the fifth lens is smaller. In particular, the edge displacement of the third lens and the fifth lens is significantly smaller than that of the optical lens of the first example and the optical lens of the third example, and the lens assembly stability is higher. Figure 16B As shown in the figure, when EP02 / EP23=8.45, the stress on the edge of the third lens is small, and the lens is not easily deformed or broken. Figure 17A As shown in Table 1, when D5s / d2s=7.72, it can be seen that the displacement difference between the center and the edge of the third lens and the fifth lens is larger than that of the optical lens in the second example, that is, the deformation of the third lens and the fifth lens is larger, and the assembly stability of the lens is poor. Figure 17B As shown, when EP02 / EP23 = 15.84, the step difference between the center and edge of the third lens is large, resulting in poor lens stability during assembly and greater stress on the edge of the third lens, posing a risk of breakage. The positive and negative displacements represent the direction of displacement. Table 1 below shows the center-edge displacement of the third and fifth lenses for the first, second, and third examples.

[0092] Table 1

[0093]

[0094] Preferably, the optical lens satisfies: 1.63≤L / (f×tan(Semi-FOV))≤1.92; 5.57≤(CT2+CT4) / CT3≤7.45; 5.90≤D5s / d2s≤6.69; and 6.73≤EP02 / EP23≤8.60.

[0095] According to some embodiments of the present application, the optical lens satisfies: 0.21≤CT2 / L≤0.25; wherein CT2 is the center thickness of the second lens, and L is the maximum height of the lens barrel.

[0096] In this way, the second lens, as the lens with the largest center thickness in the lens group, can control the proportion of the second lens in the overall lens barrel by limiting the ratio of CT2 and L, and can also prevent the maximum height of the lens barrel from being too long, thereby keeping the lens structure compact and making the lens suitable for a variety of application scenarios.

[0097] According to some embodiments of the present application, the optical lens satisfies: 4.00<d0s / d2s<4.55; wherein d0s is the inner diameter of the object side of the lens barrel, and d2s is the inner diameter of the object side of the second spacer element.

[0098] In this way, by limiting the ratio of d0s to d2s, the size of the object side of the lens barrel and the light aperture after the second lens can be constrained, and the light transmission efficiency and stray light suppression can be balanced to avoid vignetting or abnormal aperture effect problems.

[0099] Preferably, the optical lens satisfies: 4.03≤d0s / d2s≤4.51.

[0100] According to some embodiments of the present application, the optical lens satisfies: 3.05<d0smin / d2m<3.50; wherein d0smin is the minimum aperture of the object side end of the lens barrel, and d2m is the inner diameter of the image side surface of the second spacer element.

[0101] In this way, the minimum aperture d0smin at the object-side end of the lens barrel can determine the amount of light entering the lens barrel. By controlling the ratio d0smin / d2m, the light entering the lens following the second spacer element can be constrained, suppressing vignetting and stray light, thereby improving image quality in the peripheral field of view.

[0102] Preferably, the optical lens satisfies: 3.07≤d0smin / d2m≤3.49.

[0103] According to some embodiments of the present application, the optical lens satisfies: 3.50<D3s / d2m<5.55; wherein D3s is the outer diameter of the object side surface of the third spacer element, and d2m is the inner diameter of the image side surface of the second spacer element.

[0104] In this way, by controlling the ratio of D3s to d2m, it is possible to ensure that the outer diameter of the third spacer element is large enough to intercept stray light reflected from the inner wall of the second spacer element, prevent stray light from entering the subsequent lens edge area, and significantly reduce the risk of stray light.

[0105] Preferably, the optical lens satisfies: 3.53≤D3s / d2m≤5.54.

[0106] According to some embodiments of the present application, the optical lens satisfies the following conditions: 2.36≤CT2 / (CT1+CT3)≤2.94; and 4.85<EP02 / T12<7.20; wherein CT2 is the center thickness of the second lens, CT1 is the center thickness of the first lens, CT3 is the center thickness of the third lens, EP02 is the distance from the object-side end surface of the lens barrel to the object-side surface of the second spacer element along the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0107] In this way, by controlling the ratio of CT2 / (CT1+CT3) and the ratio of EP02 / T12, the relationship between the non-light-transmitting area and the center thickness of the lens can be constrained, thereby adjusting the refractive index gradient of the lens group, making the propagation path of light in the edge area near the optical axis more uniform, and improving the imaging quality of the lens.

[0108] Preferably, the optical lens satisfies: 2.36≤CT2 / (CT1+CT3)≤2.94; and 4.87≤EP02 / T12≤7.19.

[0109] According to some embodiments of the present application, the optical lens satisfies: 2.10≤DT21 / DT22<2.45; and 1.30<(R3+R4) / D2s<2.75; wherein DT21 is the effective radius of the object side surface of the second lens, DT22 is the effective radius of the image side surface of the second lens, R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, and D2s is the outer diameter of the object side surface of the second spacer element.

[0110] In this way, by controlling DT21, DT22 and the ratio of (R3+R4) / D2s, and thereby constraining the effective radius and curvature radius on both sides of the second lens, it is possible to dynamically compensate for spherical aberration and coma while adjusting the light distribution on both sides of the second lens.

[0111] Preferably, the optical lens satisfies: 2.10≤DT21 / DT22≤2.41; and 1.32≤(R3+R4) / D2s≤2.70.

[0112] According to some embodiments of the present application, the optical lens satisfies the following conditions: 3.00≤D3s / d3m<4.70; and 3.30≤D4s / d4s<3.75; wherein D3s is the outer diameter of the object-side surface of the third spacer element, d3m is the inner diameter of the image-side surface of the third spacer element, D4s is the outer diameter of the object-side surface of the fourth spacer element, and d4s is the inner diameter of the object-side surface of the fourth spacer element.

[0113] In this way, by controlling the ratios of D3s / d3m and D4s / d4s, the widths of the effective annular surfaces of the third and fourth spacer elements can be limited. This can effectively block excess light from the edges of the fourth lens, preventing it from entering subsequent lenses. This reduces the risk of stray light and avoids uneven illumination on the image plane caused by sudden changes in aperture in the optical path.

[0114] Preferably, the optical lens satisfies: 3.00≤D3s / d3m≤4.69; 3.30≤D4s / d4s≤3.73.

[0115] According to some embodiments of the present application, the spacer assembly also includes a sixth spacer element placed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 1.60<|f6 / R12|<2.55; and 2.80<EP56 / CT6<3.55; wherein f6 is the effective focal length of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, EP56 is the spacing distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0116] By controlling the aforementioned relationship to constrain the relationship between the effective focal length of the sixth lens element, the radius of curvature of the image-side surface of the sixth lens element, the distance between the fourth and fifth spacer elements on the optical axis, and the center thickness of the sixth lens element, the shape of the sixth lens can be controlled. Controlling the thickness ratio while simultaneously correcting for aberrations can reduce the effect of the sixth lens element on defocus at high temperatures, thereby improving the imaging performance of the optical lens.

[0117] Preferably, the optical lens satisfies: 1.61≤|f6 / R12|≤2.53; 2.81≤EP56 / CT6≤3.51.

[0118] According to some embodiments of the present application, the spacer assembly also includes a sixth spacer element placed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 1.00<D6s / D5m<1.10; and 1.10<d6s / d5m<1.55; wherein D6s is the outer diameter of the object side surface of the sixth spacer element, D5m is the outer diameter of the image side surface of the fifth spacer element, d6s is the inner diameter of the object side surface of the sixth spacer element, and d5m is the inner diameter of the image side surface of the fifth spacer element.

[0119] In this way, by controlling the ratio of D6s / D5m and the sum of the ratios of d6s / d5m, and limiting the coordinated changes in the clear aperture and outer diameter of adjacent spacer elements in the optical path, a gradual transition of the pupil size can be ensured, preventing problems such as uneven illumination or glare on the image plane.

[0120] Preferably, the optical lens satisfies: 1.04≤D6s / D5m≤1.05; 1.13≤d6s / d5m≤1.51.

[0121] According to some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and a seventh spacer element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens, and the optical lens satisfies: 1.95<D7s / d6m<2.40; wherein D7s is the outer diameter of the object side surface of the seventh spacer element, and d6m is the inner diameter of the image side surface of the sixth spacer element.

[0122] In this way, by controlling the ratio of D7s / d6m, it is beneficial to finally intercept the excess edge light generated by the seventh lens.

[0123] Preferably, the optical lens satisfies: 1.97≤D7s / d6m≤2.38.

[0124] According to some embodiments of the present application, the spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 21.50<(D6m-d6s) / (CP6×10)<26.50; wherein D6m is the outer diameter of the image side surface of the sixth spacer element, d6s is the inner diameter of the object side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0125] In this way, since the sixth spacer element fits tightly with the inner wall of the lens barrel and the edge of the sixth lens, by limiting the ratio of (D6m-d6s) and (CP6×10), the relationship between the diameter and thickness of the sixth spacer element can be optimized, thereby dispersing the assembly pressure and reducing lens offset or lens barrel deformation caused by local stress concentration.

[0126] Preferably, the optical lens satisfies: 22.00≤(D6m-d6s) / (CP6×10)≤26.49.

[0127] According to some embodiments of the present application, the optical lens satisfies: 0.90<f4 / f5<1.60; and 0.65<(d5s-d4m) / EP45<0.95; wherein f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side surface of the fifth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis.

[0128] Controlling the ratio of the focal length of the fourth lens element to the focal length of the fifth lens element helps balance aberrations. However, the deflection of light at this point is susceptible to temperature. By limiting the ratio of (d5s - d4m) to EP45, the matching of the inner diameter and the spacing can adapt to material deformation caused by temperature changes, reducing the impact of thermal stress on optical axis offset.

[0129] Preferably, the optical lens satisfies: 0.93≤f4 / f5≤1.58; and 0.68≤(d5s-d4m) / EP45≤0.91.

[0130] According to another aspect of the present application, the present application also provides an optical lens, comprising a lens barrel, a lens group and a spacer assembly housed in the lens barrel; the lens group is arranged in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power; wherein the object-side surface and the image-side surface of the first lens are both concave, the object-side surface and the image-side surface of the second lens are convex and concave respectively, the object-side surface and the image-side surface of the third lens are concave and convex respectively, the object-side surface and the image-side surface of the fourth lens are both convex, the object-side surface and the image-side surface of the fifth lens are both convex, the object-side surface and the image-side surface of the sixth lens are convex and concave respectively, and the object-side surface and the image-side surface of the seventh lens are convex and concave respectively; the spacer assembly further comprises a sixth spacer element disposed on the image side of the sixth lens and in contact with the image-side surface of the sixth lens, and the optical lens satisfies:

[0131] 2.10≤d0m / d6s≤2.55; and

[0132] 21.50<(D6m-d6s) / (CP6×10)<26.50;

[0133] Wherein, d0m is the inner diameter of the image side end surface of the lens barrel, d6s is the inner diameter of the object side surface of the sixth spacer element, D6m is the outer diameter of the image side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0134] It can be understood that the larger inner diameter d0m of the lens barrel end can allow more effective light to pass through, while the smaller inner diameter d6s of the sixth spacer element can limit the light transmission range of the subsequent optical path. By controlling the ratio of d0m to d6s between 2.10 and 2.55, the sixth spacer element can block stray reflected light from the inner wall of the lens barrel from entering the area behind the sixth lens element, especially preventing large-angle stray light from reflecting from the surface of the seventh lens element and reaching the image plane.

[0135] Preferably, the optical lens satisfies: 2.10≤d0m / d6s≤2.55; and 22.00≤(D6m-d6s) / (CP6×10)≤26.49.

[0136] It should be noted that those skilled in the art will appreciate that, without departing from the claimed technical solution, the number of spacer elements in the optical lens may be varied to achieve the various results and advantages described herein, and this application does not impose specific limitations thereon. For example, the optical lens may include a different number of spacer elements than that described in the above embodiments, as desired.

[0137] Some specific but non-limiting examples of the above-mentioned embodiments of the present application are described in more detail below with reference to the accompanying drawings. Figure 2 As shown, for the convenience of description, in the following embodiments, OBJ represents the object plane of the optical lens, STO represents the surface of the aperture, S1 represents the object-side surface of the first lens E1, S2 represents the image-side surface of the first lens E1, S3 represents the object-side surface of the second lens E2, S4 represents the image-side surface of the second lens E2, S5 represents the object-side surface of the third lens E3, S6 represents the image-side surface of the third lens E3, S7 represents the object-side surface of the fourth lens E4, S8 represents the image-side surface of the fourth lens E4, S9 represents the object-side surface of the fifth lens E5, S10 represents the image-side surface of the fifth lens E5, S11 represents the object-side surface of the sixth lens E6, S12 represents the image-side surface of the sixth lens E6, S13 represents the object-side surface of the seventh lens E7, S14 represents the image-side surface of the seventh lens, S15 represents the object-side surface of the filter E8, S16 represents the image-side surface of the filter E8, and S17 represents the image plane of the optical lens.

[0138] Example 1

[0139] like Figure 3As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacer assembly includes a second spacer element P2 positioned on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacer element P3 positioned on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 positioned on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 positioned on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0140] In this embodiment, the spacer assembly further includes a fourth auxiliary spacer element P4b positioned on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, a sixth spacer element P6 positioned on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacer element P7 positioned on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0141] In this embodiment, the first lens E1 has negative focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are both concave surfaces; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are concave and convex surfaces, respectively; the fourth lens E4 has positive focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are both convex surfaces; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave surfaces, respectively; the seventh lens E7 has negative focal power, and the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are convex and concave surfaces, respectively.

[0142] In addition, Table 2 shows the basic optical parameters of the optical lens of Example 1, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0143] Table 2: Basic optical parameters of the optical lens of Example 1

[0144]

[0145] In this embodiment, the object-side surface and the image-side surface of any lens from the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0146] ;

[0147] 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., paraxial curvature c is the reciprocal of the radius of curvature R in Table 2 above); k is the conic coefficient; Ai is the correction coefficient 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 each aspheric mirror surface S1 to S14 in Example 1.

[0148] Table 3: Aspheric coefficients of the optical lens of Example 1

[0149]

[0150] Example 2

[0151] like Figure 4 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0152] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0153] It is noteworthy that the optical lens of Example 2 has the same optical parameters as those of Example 1. Specifically, the basic optical parameter table of the optical lens of Example 2 is the same as Table 2, and the aspheric coefficient table is the same as Table 3. The structural data of the optical lens of Example 2 is shown in Table 9 below.

[0154] Specifically, the values ​​of the various relevant structural parameters in the second embodiment and the above-mentioned first embodiment are respectively shown in Table 9 below. The multiple structural parameters specifically include: the inner diameter d2s of the object-side surface of the second spacer element P2; the inner diameter d2m of the image-side surface of the second spacer element P2; the outer diameter D2s of the object-side surface of the second spacer element P2; the inner diameter d3m of the image-side surface of the third spacer element P3; the outer diameter D3s of the object-side surface of the third spacer element P3; the inner diameter d4s of the object-side surface of the fourth spacer element P4; the inner diameter d4m of the image-side surface of the fourth spacer element P4; the outer diameter D4s of the object-side surface of the fourth spacer element P4; the inner diameter d5s of the object-side surface of the fifth spacer element P5; the inner diameter d5m of the image-side surface of the fifth spacer element P5; the outer diameter D5m of the image-side surface of the fifth spacer element P5; the inner diameter d6s of the object-side surface of the sixth spacer element P6 The inner diameter d6s of the object side surface; the inner diameter d6m of the image side surface of the sixth spacer element P6; the outer diameter D6s of the object side surface of the sixth spacer element P6; the outer diameter D6m of the image side surface of the sixth spacer element P6; the outer diameter D7s of the object side surface of the seventh spacer element P7; the inner diameter d0s of the object side surface of the lens barrel P0; the distance EP02 from the object side end surface of the lens barrel P0 to the object side surface of the second spacer element P2 along the optical axis; the spacing distance EP23 between the second spacer element P2 and the third spacer element P3 along the optical axis; the spacing distance EP45 between the fourth spacer element P4 and the fifth spacer element P5 along the optical axis; the maximum thickness CP6 of the sixth spacer element P6; the maximum height L of the lens barrel P0; the minimum aperture d0smin of the object side end of the lens barrel P0; the inner diameter d0m of the image side end surface of the lens barrel. It can be understood that the units of the numerical values ​​of the parameters shown in Table 9 are all millimeters (mm), and the schematic diagram of the parameters in the structural diagram of the optical lens is as follows: Figure 1 shown.

[0155] Example 3

[0156] like Figure 5 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0157] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0158] It is noteworthy that the optical lens of Example 3 has the same optical parameters as those of Example 1. Specifically, the basic optical parameter table of the optical lens of Example 3 is the same as Table 2, and the aspheric coefficient table is the same as Table 3. The numerical values ​​of the various relevant structural parameters in Example 3 are shown in Table 9 below. The specific descriptions of the various structural parameters are the same as those in Example 2 above and are not repeated here.

[0159] The axial chromatic aberration curves of the optical lenses in Example 1, Example 2 and Example 3 are as follows: Figure 6A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in Example 1, Example 2 and Example 3 are shown in FIG. Figure 6B As shown in , it represents the degree of meridional image curvature and sagittal image curvature. Figure 6A and Figure 6B It can be seen that the optical lenses in the first embodiment, the second embodiment and the third embodiment can all achieve good imaging quality.

[0160] Example 4

[0161] like Figure 7 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacer assembly includes a second spacer element P2 positioned on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacer element P3 positioned on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 positioned on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 positioned on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0162] In this embodiment, the spacer assembly further includes a fourth auxiliary spacer element P4b positioned on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, a sixth spacer element P6 positioned on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacer element P7 positioned on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0163] In this embodiment, the first lens E1 has negative focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are both concave surfaces; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are concave and convex surfaces, respectively; the fourth lens E4 has positive focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are both convex surfaces; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave surfaces, respectively; the seventh lens E7 has negative focal power, and the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are convex and concave surfaces, respectively.

[0164] In addition, Table 4 shows the basic optical parameters of the optical lens of Example 4, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0165] Table 4: Basic optical parameters of the optical lens of Example 4

[0166]

[0167] In this embodiment, both the object-side and image-side surfaces of each of the first through seventh lenses E1 through E7 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas described in Example 1. Table 5 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric surfaces S1 through S14 that can be used in Example 4.

[0168] Table 5: Aspheric coefficients of the optical lens of Example 4

[0169]

[0170] Example 5

[0171] like Figure 8 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0172] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0173] It is noteworthy that the optical lens of this fifth embodiment has the same optical parameters as those of the fourth embodiment. Specifically, the basic optical parameter table of the optical lens of this fifth embodiment is the same as that in Table 4, and the aspheric coefficient table is the same as that in Table 5. The numerical values ​​of the various relevant structural parameters in this fifth embodiment are shown in Table 9 below. The specific descriptions of the various structural parameters are the same as those in the second embodiment above and are not repeated here.

[0174] Example 6

[0175] like Figure 9 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0176] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0177] It is noteworthy that the optical lens of Example 6 has the same optical parameters as those of Example 4. Specifically, the basic optical parameter table of the optical lens of Example 6 is the same as Table 4, and the aspheric coefficient table is the same as Table 5. The numerical values ​​of the various relevant structural parameters in Example 6 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those in Example 2 above and are not repeated here.

[0178] The axial chromatic aberration curves of the optical lenses in the fourth, fifth and sixth embodiments are as follows: Figure 10A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in Example 4, Example 5 and Example 6 are shown in FIG. Figure 10B As shown in , it represents the degree of meridional image curvature and sagittal image curvature. Figure 10A and Figure 10B It can be seen that the optical lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0179] Example 7

[0180] like Figure 11As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacer assembly includes a second spacer element P2 positioned on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacer element P3 positioned on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 positioned on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 positioned on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0181] In this embodiment, the spacer assembly further includes a fourth auxiliary spacer element P4b positioned on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, a sixth spacer element P6 positioned on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacer element P7 positioned on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0182] In this embodiment, the first lens E1 has negative focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are both concave surfaces; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are concave and convex surfaces, respectively; the fourth lens E4 has positive focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are both convex surfaces; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave surfaces, respectively; the seventh lens E7 has negative focal power, and the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are convex and concave surfaces, respectively.

[0183] In addition, Table 6 shows the basic optical parameters of the optical lens of Example 7, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0184] Table 6: Basic optical parameters of the optical lens of Example 7

[0185]

[0186] In this embodiment, both the object-side and image-side surfaces of each of the first through seventh lenses E1 through E7 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas given in Example 1. Table 7 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspheric surfaces S1 through S6 and S8 through S14 that can be used in Example 7.

[0187] Table 7: Aspheric coefficients of the optical lens of Example 7

[0188]

[0189] Example 8

[0190] like Figure 12 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0191] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0192] It is noteworthy that the optical lens of Example 8 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical lens of Example 8 is the same as Table 6, and the aspheric coefficient table is the same as Table 7. The numerical values ​​of the various relevant structural parameters in Example 8 are shown in Table 9 below. The specific descriptions of the various structural parameters are the same as those in Example 2 above and are not repeated here.

[0193] Embodiment 9

[0194] like Figure 13 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group is arranged in sequence from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7.

[0195] In this embodiment, the spacing assembly includes a second spacing element P2, a third spacing element P3, a fourth spacing element P4, a fourth auxiliary spacing element P4b, a fifth spacing element P5, a sixth spacing element P6, and a seventh spacing element P7.

[0196] It is noteworthy that the optical lens of Example 9 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical lens of Example 9 is the same as Table 6, and the aspheric coefficient table is the same as Table 7. The numerical values ​​of the various relevant structural parameters in Example 9 are shown in Table 9 below. The specific descriptions of the various structural parameters are the same as those in Example 2 above and are not repeated here.

[0197] The axial chromatic aberration curves of the optical lenses in Example 7, Example 8 and Example 9 are as follows: Figure 14A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in Example 7, Example 8 and Example 9 are shown in FIG. Figure 14B As shown in , it represents the degree of meridional image curvature and sagittal image curvature. Figure 14A and Figure 14B It can be seen that the optical lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment can all achieve good imaging quality.

[0198] In summary, in Examples 1 to 9, half of the maximum field of view (Semi-FOV) of the optical lens, the effective focal length f of the optical lens, and the effective focal lengths f1 to f7 of the first lens E1 to the seventh lens E7 in the optical lens are respectively as shown in Table 8 below.

[0199] Table 8: Optical parameters of optical lens

[0200]

[0201] In addition, the structural parameters of the optical lenses in Examples 1 to 9 are specifically shown in Table 9.

[0202] Table 9: Structural parameters of optical lenses

[0203]

[0204] In summary, the optical lenses in Examples 1 to 9 satisfy the relationship shown in Table 10, as shown in Table 10.

[0205] Table 10: Relationships satisfied by optical lenses

[0206]

[0207] It is worth mentioning that according to one aspect of the present application, one embodiment of the present application further provides a camera module, which may include the above-mentioned optical lens and a photosensitive element, wherein the photosensitive element is arranged on the image side of the optical lens to form an image. It is understood that the photosensitive element mentioned in the present application may be implemented as, but not limited to, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and this application will not elaborate on this.

[0208] In addition, according to another aspect of the present application, one embodiment of the present application further provides an electronic device, which may include the above-mentioned camera module and a processor, wherein the camera module is communicatively connected to the processor to acquire image data and input the image data into the processor for processing. It is understood that the electronic device mentioned in this application can be implemented as, but not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate on this.

[0209] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0210] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An optical lens, characterized in that: The invention comprises a lens barrel and a lens group and a spacer assembly accommodated in the lens barrel; the lens group is arranged in order from the object side to the image side along the optical axis: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power; The center thickness of the second lens is greater than the center thickness of other lenses in the lens group, and the maximum thickness of the non-light-transmitting area of ​​the second lens is greater than the maximum thickness of the non-light-transmitting area of ​​other lenses; the spacer assembly includes a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the optical lens satisfies: 1.60<L / (f×tan(Semi-FOV))<1.95; 5.55<(CT2+CT4) / CT3<7.50; 5.90≤D5s / d2s<7.00; and 6.70<EP02 / EP23<8.65; Wherein, L is the maximum height of the lens barrel, f is the effective focal length of the optical lens, Semi-FOV is half of the maximum field of view of the optical lens, CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, CT4 is the center thickness of the fourth lens, D5s is the outer diameter of the object side surface of the fifth spacer element, d2s is the inner diameter of the object side surface of the second spacer element, EP02 is the distance from the object side end surface of the lens barrel to the object side surface of the second spacer element along the optical axis, and EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis.

2. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 0.21≤CT2 / L≤0.25; Wherein, CT2 is the center thickness of the second lens, and L is the maximum height of the lens barrel.

3. The optical lens according to claim 2, wherein: The optical lens meets the following requirements: 4.00<d0s / d2s<4.55; Wherein, d0s is the inner diameter of the object side surface of the lens barrel, and d2s is the inner diameter of the object side surface of the second spacer element.

4. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 3.05<d0smin / d2m<3.50; Wherein, d0smin is the minimum aperture of the object side end of the lens barrel, and d2m is the inner diameter of the image side surface of the second spacer element.

5. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 3.50<D3s / d2m<5.55; Wherein, D3s is the outer diameter of the object-side surface of the third spacer element, and d2m is the inner diameter of the image-side surface of the second spacer element.

6. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 2.36≤CT2 / (CT1+CT3)≤2.94; and 4.85<EP02 / T12<7.20; Wherein, CT2 is the center thickness of the second lens, CT1 is the center thickness of the first lens, CT3 is the center thickness of the third lens, EP02 is the distance from the object-side end face of the lens barrel to the object-side face of the second spacer element along the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 2.10≤DT21 / DT22<2.45; and 1.30<(R3+R4) / D2s<2.75; Among them, DT21 is the effective radius of the object side of the second lens, DT22 is the effective radius of the image side of the second lens, R3 is the curvature radius of the object side of the second lens, R4 is the curvature radius of the image side of the second lens, and D2s is the outer diameter of the object side of the second spacer element.

8. The optical lens according to claim 1, wherein: The optical lens meets the following requirements: 3.00≤D3s / d3m<4.70; and 3.30≤D4s / d4s<3.75; Wherein, D3s is the outer diameter of the object-side surface of the third spacer element, d3m is the inner diameter of the image-side surface of the third spacer element, D4s is the outer diameter of the object-side surface of the fourth spacer element, and d4s is the inner diameter of the object-side surface of the fourth spacer element.

9. The optical lens according to claim 8, wherein: The spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 1.60<|f6 / R12|<2.55; and 2.80<EP56 / CT6<3.55; Among them, f6 is the effective focal length of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, EP56 is the spacing distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

10. The optical lens according to claim 8, wherein: The spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 1.00<D6s / D5m<1.10; and 1.10<d6s / d5m<1.55; Wherein, D6s is the outer diameter of the object-side surface of the sixth spacer element, D5m is the outer diameter of the image-side surface of the fifth spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and d5m is the inner diameter of the image-side surface of the fifth spacer element.

11. The optical lens according to claim 1, wherein: The spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and a seventh spacer element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens. The optical lens satisfies: 1.95<D7s / d6m<2.40; Wherein, D7s is the outer diameter of the object-side surface of the seventh spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element.

12. The optical lens according to claim 1, wherein: The spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 21.50<(D6m-d6s) / (CP6×10)<26.50; Wherein, D6m is the outer diameter of the image-side surface of the sixth spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

13. The optical lens according to any one of claims 1 to 12, wherein: The optical lens meets the following requirements: 0.90<f4 / f5<1.60; and 0.65<(d5s-d4m) / EP45<0.95; Among them, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side surface of the fifth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis.

14. The optical lens according to any one of claims 1 to 11, wherein: The spacer assembly further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and the optical lens satisfies: 2.10≤d0m / d6s≤2.55; and 21.50<(D6m-d6s) / (CP6×10)<26.50; Wherein, d0m is the inner diameter of the image side end surface of the lens barrel, d6s is the inner diameter of the object side surface of the sixth spacer element, D6m is the outer diameter of the image side surface of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

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