Optical lens

Abstract

The application provides an optical lens, comprising a lens barrel, a lens set and a spacer assembly contained in the lens barrel; the lens set is sequentially arranged from an object side to an image side along an optical axis as follows: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power and a seventh lens with negative refractive power; the center thickness of the second lens is greater than the center thickness of other lenses in the lens set, 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, a third spacer element, a fourth spacer element and a fifth spacer element; the optical lens satisfies the following conditions: 1.60 < L / (f x 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.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the rapid development of the fields of smart phones, vehicle-mounted cameras, security monitoring, etc., optical lenses need to balance the pursuit of high pixels, wide angle, miniaturization, and also need to take into account the imaging quality and structural reliability. Especially in the design of ultra-wide-angle lenses, how to balance the contradiction between the field of view angle, the total length of the lens and the optical performance has become a technical difficulty in the industry.

[0003] In order to balance the relationship between the field of view angle, the total length of the lens and the optical performance, some optical lenses on the market can meet the needs of ultra-wide angle and miniaturization by designing the spacing gaps between the lenses of the lens and constraining the key parameters of the lenses, so that the optical lenses have good optical performance and can be widely used in mobile phones, unmanned aerial vehicles and other scenes with strict requirements on volume and imaging quality. However, in such optical lenses, the thick lenses are easy to cause deformation of the rear lenses from the axial and radial directions, thereby affecting the assembly stability of the optical lens. SUMMARY

[0004] One advantage of the present application is to provide an optical lens which can solve the problem of excessive thickness of lenses caused by balancing the field of view angle, the total length of the lens and the optical performance in traditional optical lenses, affecting the assembly stability of the optical lens.

[0005] In one aspect, the present application provides an optical lens, comprising a lens barrel and a lens group and a spacing assembly contained 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 refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power and a seventh lens with negative refractive 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 spacing assembly comprises a second spacing element placed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacing element placed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacing 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 spacing element placed 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 x 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 angle 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 interval 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 surface 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 application, the optical lens satisfies:

[0024] 2.36≤CT2 / (CT1+CT3)≤2.94; and

[0025] 4.85

[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 surface of the lens barrel to the object side surface of the second spacer element along the optical axis direction, and T12 is the air gap of the first lens and the second lens on the optical axis.

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

[0028] 2.10≤DT21 / DT22<2.45; and

[0029] 1.30

[0030] 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.

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

[0036] 1.60

[0037] 2.80

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

[0039] In some embodiments of the application, 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:

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

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

[0042] In some embodiments of the application, 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:

[0043] 1.95 < D7s / d6m < 2.40;

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

[0045] In some embodiments of the application, 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:

[0046] 21.50 < (D6m-d6s) / (CP6x10) < 26.50;

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

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

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

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

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

[0052] In some embodiments of the application, 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:

[0053] 2. 10≤d0m / d6s≤2.55; and

[0054] 21.50<(D6m-d6s) / (CP6x10)<26.50;

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

[0056] The optical lens of this application is a seven-element ultra-wide-angle optical lens. The lens barrel height, effective focal length, and half of the maximum field of view satisfy the relationship 1.60 < L / (f×tan(Semi-FOV)) < 1.95. Simultaneously, the center thicknesses of the second, third, and fourth lenses satisfy the relationship 5.55 < (CT2+CT4) / CT3 < 7.50. Furthermore, the center thickness of the second lens and the maximum thickness of its non-transparent area are greater than the center thicknesses and non-transparent area thicknesses of the other lenses in the lens group. This results in a higher structural rigidity for the second lens, causing deformation in the third lens directly adjacent to it and in the fifth lens, which is affected by the preceding stress. To address this, this application mitigates the deformation problem caused by the stress exerted by the second lens on the third and fifth lenses by constraining the ratio of the outer diameter of the object-side surface of the fifth spacer element to the inner diameter of the object-side surface of the second spacer element, the ratio of the distance between the object-side surface of the lens barrel and the object-side surface of the second spacer element on the optical axis, and the ratio of the air gap between the first and second lenses 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 distance between the stress points on the bearing surfaces of the second and fifth lenses in the radial direction is basically the same. This ensures that the axial edge pressure is evenly distributed when assembly force is applied to the lens, and controls the displacement difference between the center and the non-transparent area of ​​the third and fifth lenses to be relatively small. Furthermore, by using the axial ratio of EP02 / EP23, the thickness of the non-transparent area of ​​the lens in front of the third lens and the maximum thickness of the non-transparent area of ​​the third lens are limited. This ensures that the center and edge of the third lens remain basically horizontal in the optical axis direction, thereby ensuring that the stress on the edge of the third lens is not too large when it is under pressure, and that it will not cause large deformation leading to lens breakage, thus increasing the stability of lens assembly. Attached Figure Description

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

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

[0059] Figure 3 This is a schematic diagram of the structure of an optical lens according to Embodiment 1 of this application;

[0060] Figure 4 This is a schematic diagram of the structure of an optical lens according to Embodiment 2 of this application;

[0061] Figure 5 This is a schematic diagram of the structure of an optical lens according to Embodiment 3 of this application;

[0062] Figure 6AFig. 16 shows an on-axis chromatic aberration curve of the optical lens according to the above embodiment one, the above embodiment two and the above embodiment three of the present application;

[0063] Figure 6B Fig. 17 shows an astigmatism curve of the optical lens according to the above embodiment one, the above embodiment two and the above embodiment three of the present application;

[0064] Figure 7 Fig. 18 is a structural diagram of an optical lens according to an embodiment four of the present application;

[0065] Figure 8 Fig. 19 is a structural diagram of an optical lens according to an embodiment five of the present application;

[0066] Figure 9 Fig. 20 is a structural diagram of an optical lens according to an embodiment six of the present application;

[0067] Figure 10A Fig. 21 shows an on-axis chromatic aberration curve of the optical lens according to the above embodiment four, the above embodiment five and the above embodiment six of the present application;

[0068] Figure 10B Fig. 22 shows an astigmatism curve of the optical lens according to the above embodiment four, the above embodiment five and the above embodiment six of the present application;

[0069] Figure 11 Fig. 23 is a structural diagram of an optical lens according to an embodiment seven of the present application;

[0070] Figure 12 Fig. 24 is a structural diagram of an optical lens according to an embodiment eight of the present application;

[0071] Figure 13 Fig. 25 is a structural diagram of an optical lens according to an embodiment nine of the present application;

[0072] Figure 14A Fig. 26 shows an on-axis chromatic aberration curve of the optical lens according to the above embodiment seven, the above embodiment eight and the above embodiment nine of the present application;

[0073] Figure 14B Fig. 27 shows an astigmatism curve of the optical lens according to the above embodiment seven, the above embodiment eight and the above embodiment nine of the present application;

[0074] Figure 15A Fig. 28 shows an assembly deformation diagram of the optical lens of the first example when L / (fxtan(Semi-FOV))=1.7, (CT2+CT4) / CT3=7.45, D5s / d2s=4.45 and EP02 / EP23=6.65 are met;

[0075] Figure 15B an assembly deformation map of the optical lens of the first example is shown when L / (fxtan(Semi-FOV)) = 1.7, (CT2+CT4) / CT3 = 7.45, D5s / d2s = 4.45, and EP02 / EP23 = 6.65;

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

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

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

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

[0080] For a better understanding of the present application, various aspects of the present application will be described in greater detail below with reference to the drawings. It is to be understood that the detailed description is merely exemplary of the application and is not intended to limit the scope of the application in any way. Throughout this application, the same reference numerals are used to designate similar or corresponding components. 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 the present specification, the expressions first, second, third, etc. are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0082] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0083] In this context, the paraxial region refers to a region near the optical axis. If a lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the shape of the surface in the paraxial region can be made in accordance with a general method in the art, for example, judging convexity or concavity by the sign of the R value (R refers to the radius of curvature in the paraxial region). In this context, the surface of each lens closest to the object is referred to as the object side surface of the lens, and the surface of each lens closest to the image plane is referred to as the image side surface of the lens. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0084] It should also be understood that the use of the terms "including", "including have", "have", "contain" and / or "contain have", when used in this specification, indicates the presence of the stated features, elements and / or components but does not exclude 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 and not the individual elements of the list. In addition, when describing embodiments of the present application, the use of "may" indicates "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 (including technical and scientific terms) used herein 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 that is 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 so defined herein.

[0086] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The following embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are 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 combination with the embodiments.

[0087] According to an aspect of the present application, as shown in Figure 1 and Figure 2 The present application provides an optical lens, comprising a lens barrel, and a lens group and a spacer assembly contained in the lens barrel; the lens group is arranged in order from the object side to the image side along the optical axis as follows: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with negative refractive 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 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 x 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 angle 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 spacer distance of 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 embodiments of the present application is a seven-piece type ultra-wide-angle optical lens, 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 x tan(Semi-FOV)) < 1.95, 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 and the maximum thickness of the non-light-transmitting area of the second lens 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 second lens to have relatively large structural rigidity, and the third lens directly adjacent to the second lens and the fifth lens affected by the stress in front will both be deformed. Therefore, the present application improves the deformation problem caused by the stress of the second lens on the third lens and the fifth lens by restricting the ratio of the outer diameter of the object side surface of the fifth spacing element to the inner diameter of the object side surface of the second spacing element, the distance on the optical axis from the object side surface of the barrel to the object side surface of the second spacing element, and the ratio of the air gap on the optical axis between the first lens and the second lens, thereby controlling the displacement difference between the center and the non-light-transmitting area of the third lens and the fifth lens to be relatively small. Further, by limiting the thickness of the non-light-transmitting area of the lens before the third lens and the maximum thickness of the non-light-transmitting area of the third lens by the ratio of EP02 / EP23 in the axial direction, the center and the edge of the third lens are basically kept horizontal in the optical axis direction, thereby ensuring that the stress of the edge of the third lens is not too large when the edge is pressed, and the third lens will not be broken due to large deformation, 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] Exemplarily, Figure 15A and Figure 15B respectively show the assembly deformation diagram of the optical lens of the first example and the assembly stress diagram of the third lens when L / (f x tan(Semi-FOV)) = 1.7, (CT2+CT4) / CT3 = 7.45, D5s / d2s = 4.45, and EP02 / EP23 = 6.65 are satisfied; Figure 16Aand Figure 16B respectively show the assembly deformation diagram of the optical lens of the second example and the assembly stress diagram of the third lens when L / (fxtan(Semi-FOV)) = 1.7, (CT2+CT4) / CT3 = 7.45, D5s / d2s = 6.02 and EP02 / EP23 = 8.45 are met; Figure 17A and Figure 17B respectively show the assembly deformation diagram of the optical lens of the third example and the assembly stress diagram of the third lens when L / (fxtan(Semi-FOV)) = 1.7, (CT2+CT4) / CT3 = 7.45, D5s / d2s = 7.72 and EP02 / EP23 = 15.84 are met. As can be seen from the figures, Figure 15A and 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 poorer; as Figure 15B shown, 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 the third lens has the risk of breaking. As Figure 16A and 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 of the third lens and the fifth lens is smaller, and 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 assembly stability of the lens is higher, as Figure 16B shown, when EP02 / EP23 = 8.45, the stress on the edge of the third lens is smaller, and the lens deformation and breaking phenomenon is not easy to occur. As Figure 17A and 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 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 poorer. As Figure 17B shown, when EP02 / EP23 = 15.84, the step difference between the center and the edge of the third lens is large, the stability of the lens during assembly is poor, the stress on the edge of the third lens is larger, and there is a risk of breaking. The positive and negative of the displacement represent the displacement direction. Table 1 below is the displacement amount of the center and the edge of the third lens and the fifth lens of the optical lens of the first example, the second example and the third example.

[0092] Table 1

[0093]

[0094] Preferably, the optical lens satisfies: 1.63 = (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, as the lens with the largest center thickness in the lens group, the second lens can control the proportion of the second lens in the overall lens barrel by limiting the ratio of CT2 and L, and can also avoid the maximum height of the lens barrel being too long, thereby maintaining the compact structure of the lens and enabling the lens to be applicable to various 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 and d2s, the size of the object side of the lens barrel and the light passing through the second lens can be constrained, and the balance between the light passing efficiency and the suppression of stray light can be achieved to avoid the problems of vignetting or aperture effect abnormalities.

[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 of the lens barrel, and d2m is the inner diameter of the image side of the second spacer element.

[0101] In this way, the minimum aperture d0smin of the object side of the lens barrel can determine the amount of light entering the lens barrel, and by controlling the ratio of d0smin / d2m, the light entering the subsequent lens of the second spacer element can be constrained, and the vignetting and stray light can be suppressed, thereby improving the imaging quality of the edge 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 of the third spacer element, and d2m is the inner diameter of the image side of the second spacer element.

[0104] In this way, by controlling the ratio of D3s and d2m, the outer diameter of the third spacer element can be ensured to be large enough to intercept the stray light reflected on the inner wall of the second spacer element, prevent the stray light from entering the edge area of the subsequent lens, 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: 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 of the first lens and the second lens along the optical axis.

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

[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 the ratio of DT21 and DT22 and (R3+R4) / D2s, the effective radii on both sides of the second lens and the curvature radii are further constrained, so that the dynamic compensation of spherical aberration and coma can be realized while adjusting the light quantity 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: 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 ratio of D3s / d3m and the ratio of D4s / d4s, the width of the effective annular surface of the third spacer element and the fourth spacer element can be limited, the excessive light rays hitting the edge of the fourth lens can be effectively blocked, the excessive light rays hitting the edge can be prevented from entering the subsequent lens, the risk of stray light can be reduced, and the uneven illumination of the image plane caused by the aperture mutation in the optical path can be avoided.

[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 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: 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 of the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0116] In this way, by controlling the above relationship to constrain the relationship between the effective focal length of the sixth lens, the curvature radius of the image side surface of the sixth lens, the spacing distance of the fourth spacer element to the fifth spacer element on the optical axis, and the center thickness of the sixth lens, the shape of the sixth lens can be controlled. While correcting aberration and controlling the thickness ratio, the influence of the sixth lens on the defocus amount at high temperature can be reduced, and the imaging performance of the optical lens can be improved.

[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 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: 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 sum of the ratio of D6s / D5m and the ratio of d6s / d5m, and limiting the coordinated change of the clear aperture and the outer diameter of the adjacent spacer elements in the optical path, the gradual transition of the pupil size can be ensured, and problems such as uneven image plane illumination or glare can be prevented.

[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 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 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, the edge excess light generated by the seventh lens can be effectively intercepted.

[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 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: 21.50 < (D6m-d6s) / (CP6x10) < 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 is closely matched with the inner wall of the lens barrel and the edge of the sixth lens, by limiting the ratio of (D6m-d6s) and (CP6x10), the relationship between the diameter and the thickness of the sixth spacer element can be optimized, the assembly pressure is dispersed, and the lens deviation or the lens barrel deformation caused by local stress concentration is reduced.

[0126] Preferably, the optical lens satisfies: 22.00≤(D6m-d6s) / (CP6x10)≤26.49.

[0127] According to some embodiments of the present application, the optical lens satisfies: 0.90

[0128] In this way, the ratio of the focal length of the fourth lens to the focal length of the fifth lens is controlled, which is conducive to controlling the aberration balance, but the deflection of light at this point is easily affected by temperature. By limiting the ratio of (d5s-d4m) to EP45, the matching of the inner diameter and the interval can adapt to the material deformation caused by temperature changes, reducing the influence of thermal stress on the 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 contained 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 refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power and a seventh lens with negative refractive 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 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:

[0131] 2.10≤d0m / d6s≤2.55; and

[0132] 21.50<(D6m-d6s) / (CP6x10)<26.50;

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

[0134] Understandably, a larger inner diameter d0m at the end of the lens barrel allows more effective light to pass through, while a smaller inner diameter d6s of the sixth spacer element limits the light transmission range of subsequent optical paths. 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, especially preventing large-angle stray light from reaching the image plane after being reflected from the surface of the seventh lens.

[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 should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical lens can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, the optical lens may also include other numbers of spacers than those described in the above embodiments, as needed.

[0137] The following describes some specific, non-limiting embodiments of the above-described embodiments of this application in more detail with reference to the accompanying drawings. For example... Figure 2 As shown, for ease of description, in the following embodiments, OBJ represents the object plane of the optical lens, STO represents the surface of the aperture stop, 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 comprises a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as follows: 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 comprises a second spacer element P2 disposed 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 disposed 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 disposed 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 disposed 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 comprises a fourth auxiliary spacer element P4b disposed 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 disposed 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 disposed 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 a negative focal power, and both the object side surface S1 and the image side surface S2 of the first lens E1 are concave; the second lens E2 has a positive focal power, and the object side surface S3 and the image side surface S4 of the second lens E2 are convex and concave respectively; the third lens E3 has a positive focal power, and the object side surface S5 and the image side surface S6 of the third lens E3 are concave and convex respectively; the fourth lens E4 has a positive focal power, and both the object side surface S7 and the image side surface S8 of the fourth lens E4 are convex; the fifth lens E5 has a positive focal power, and both the object side surface S9 and the image side surface S10 of the fifth lens E5 are convex; the sixth lens E6 has a negative focal power, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are convex and concave respectively; the seventh lens E7 has a negative focal power, and the object side surface S13 and the image side surface S14 of the seventh lens E7 are convex and concave respectively.

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

[0143] Table 2: Basic optical parameter table of the optical lens of Embodiment One

[0144]

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

[0146] ;

[0147] wherein x is the sag of the aspherical surface at a position along the optical axis with a height of h, c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 2 above), k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below provides the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S1 to S14 in Embodiment One.

[0148] Table 3: Aspherical surface coefficient table of the optical lens of Embodiment One

[0149]

[0150] Embodiment Two

[0151] As Figure 4 shown in the following table, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as: 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 spacer assembly includes a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7.

[0153] It is worth noting that, compared with Embodiment One described above, the optical lens of this embodiment has the same optical parameters, i.e., the basic optical parameter table of the optical lens of this embodiment is the same as Table 2, and the aspherical surface coefficient table is the same as Table 3. The structural data of the optical lens of this embodiment is shown in Table 9 below.

[0154] Specifically, the values ​​of various related structural parameters in this embodiment and in the above embodiment are shown in Table 9 below. These structural parameters specifically include: the inner diameter d2s of the object side of the second spacer element P2; the inner diameter d2m of the image side of the second spacer element P2; the outer diameter D2s of the object side of the second spacer element P2; the inner diameter d3m of the image side of the third spacer element P3; the outer diameter D3s of the object side of the third spacer element P3; the inner diameter d4s of the object side of the fourth spacer element P4; the inner diameter d4m of the image side of the fourth spacer element P4; the outer diameter D4s of the object side of the fourth spacer element P4; the inner diameter d5s of the object side of the fifth spacer element P5; the inner diameter d5m of the image side of the fifth spacer element P5; the outer diameter D5m of the image side of the fifth spacer element P5; and the outer diameter D5m of the image side of the sixth spacer element P6. The inner diameter of the object-side surface d6s; the inner diameter of the image-side surface of the sixth spacer P6 d6m; the outer diameter of the object-side surface of the sixth spacer P6 D6s; the outer diameter of the image-side surface of the sixth spacer P6 D6m; the outer diameter of the object-side surface of the seventh spacer P7 D7s; the inner diameter of the object-side surface of the lens barrel P0 d0s; the distance EP02 from the object-side end face of the lens barrel P0 to the object-side surface of the second spacer P2 along the optical axis; the spacing distance EP23 between the second spacer P2 and the third spacer P3 along the optical axis; the spacing distance EP45 between the fourth spacer P4 and the fifth spacer P5 along the optical axis; the maximum thickness CP6 of the sixth spacer P6; the maximum height L of the lens barrel P0; the minimum aperture d0smin at the object-side end of the lens barrel P0; and the inner diameter d0m of the image-side end face of the lens barrel. It is understood that the units of the values ​​shown in Table 9 are millimeters (mm), and the schematic diagrams of each parameter in the optical lens structure diagram are as follows: Figure 1 As 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 housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: 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 worth noting that the optical lens of this embodiment three has the same optical parameters compared with the above embodiment one, i.e. the basic optical parameter table of the optical lens of this embodiment three is the same as table 2, and the aspherical surface coefficient table is the same as table 3. The numerical values of each related structure parameter in this embodiment three are shown in table 9 below, and the specific description of the plurality of structure parameters is the same as the related description in the above embodiment two, which will not be repeated here.

[0159] The on-axis chromatic aberration curves of the optical lenses in the above embodiment one, embodiment two and embodiment three are shown in Figure 6A , which represent the convergence focus deviation degree of light rays with different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in the above embodiment one, embodiment two and embodiment three are shown in Figure 6B , which represent the meridional image surface curvature degree and sagittal image surface curvature degree. According to Figure 6A and Figure 6B , it can be known that the optical lenses in the above embodiment one, embodiment two and embodiment three can all achieve good imaging quality.

[0160] Embodiment four

[0161] As shown in Figure 7 , in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacing assembly accommodated in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as follows: 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 spacing assembly comprises a second spacing element P2 arranged on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 arranged on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 arranged 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 spacing element P5 arranged 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 spacing assembly further comprises a fourth auxiliary spacing element P4b arranged on the image side of the fourth spacing element P4 and in contact with the image side surface of the fourth spacing element P4, a sixth spacing element P6 arranged 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 spacing element P7 arranged 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, the object side S1 and the image side S2 of the first lens E1 are both concave; the second lens E2 has positive focal power, the object side S3 and the image side S4 of the second lens E2 are convex and concave respectively; the third lens E3 has positive focal power, the object side S5 and the image side S6 of the third lens E3 are concave and convex respectively; the fourth lens E4 has positive focal power, the object side S7 and the image side S8 of the fourth lens E4 are both convex; the fifth lens E5 has positive focal power, the object side S9 and the image side S10 of the fifth lens E5 are both convex; the sixth lens E6 has negative focal power, the object side S11 and the image side S12 of the sixth lens E6 are convex and concave respectively; the seventh lens E7 has negative focal power, the object side S13 and the image side S14 of the seventh lens E7 are convex and concave respectively.

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

[0165] Table 4: Basic optical parameter table of the optical lens of Example Four

[0166]

[0167] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type of each aspherical lens can be defined by the aspherical surface formula given in Embodiment One above. Table 5 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S1 to S14 in Example Four.

[0168] Table 5: Aspherical surface coefficient table of the optical lens of Example Four

[0169]

[0170] Example Five

[0171] As Figure 8 shown in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis: the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the 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 worth noting that, compared with Embodiment 4 above, the optical lens of Embodiment 5 has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment 5 is the same as Table 4, and the aspherical coefficient table is the same as Table 5. The values ​​of each relevant structural parameter in Embodiment 5 are shown in Table 9 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment 2 above, and will not be 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 within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: 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 worth noting that, compared with Embodiment 4 above, the optical lens of Embodiment 6 has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment 6 is the same as Table 4, and the aspherical coefficient table is the same as Table 5. The values ​​of each relevant structural parameter in Embodiment 6 are shown in Table 10 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment 2 above, and will not be repeated here.

[0178] The on-axis chromatic aberration curves of the optical lenses in Examples 4, 5, and 6 are as follows: Figure 10A As shown, this indicates the degree of deviation of the focal point after light of different wavelengths passes through the optical lens; the astigmatism curves of the optical lenses in Examples 4, 5, and 6 are shown below. Figure 10B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 10A and Figure 10B It can be seen that the optical lenses in Embodiments 4, 5 and 6 can all achieve good imaging quality.

[0179] Example 7

[0180] like Figure 11As shown, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as follows: 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 comprises a second spacer element P2 disposed 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 disposed 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 disposed 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 disposed 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 comprises a fourth auxiliary spacer element P4b disposed 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 disposed 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 disposed 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 a negative focal power, and both the object side surface S1 and the image side surface S2 of the first lens E1 are concave; the second lens E2 has a positive focal power, and the object side surface S3 and the image side surface S4 of the second lens E2 are convex and concave respectively; the third lens E3 has a positive focal power, and the object side surface S5 and the image side surface S6 of the third lens E3 are concave and convex respectively; the fourth lens E4 has a positive focal power, and both the object side surface S7 and the image side surface S8 of the fourth lens E4 are convex; the fifth lens E5 has a positive focal power, and both the object side surface S9 and the image side surface S10 of the fifth lens E5 are convex; the sixth lens E6 has a negative focal power, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are convex and concave respectively; the seventh lens E7 has a negative focal power, and the object side surface S13 and the image side surface S14 of the seventh lens E7 are convex and concave respectively.

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

[0184] Table 6: Basic optical parameter table of the optical lens of Embodiment Seven

[0185]

[0186] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type of each aspherical surface can be defined by the aspherical surface formula given in Embodiment One above. Table 7 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24 that can be used for the aspherical surfaces S1 to S6 and S8 to S14 in Embodiment Seven.

[0187] Table 7: Aspherical surface coefficient table of the optical lens of Embodiment Seven

[0188]

[0189] Embodiment Eight

[0190] As Figure 12 shown in the figure, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as follows: 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 spacer assembly comprises a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7.

[0192] It is worth noting that, compared with Embodiment Seven above, the optical lens of this embodiment has the same optical parameters, i.e., the basic optical parameter table of the optical lens of this embodiment is the same as Table 6, and the aspherical surface coefficient table is the same as Table 7. The numerical values of each relevant structural parameter in this embodiment are shown in Table 9 below, and the specific description of the plurality of structural parameters is the same as the relevant description in Embodiment Two above, which will not be repeated here.

[0193] Embodiment Nine

[0194] As Figure 13 shown in the figure, in this embodiment, the optical lens comprises a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group is arranged in order from the object side to the image side along the optical axis as follows: 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 spacer assembly comprises a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7. In this embodiment, the spacer assembly comprises a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fourth auxiliary spacer element P4b, a fifth spacer element P5, a sixth spacer element P6, and a seventh spacer element P7.

[0196] It is worth noting that, compared with the above-mentioned embodiment seven, the optical lens of this embodiment nine has the same optical parameters, i.e., the basic optical parameter table of the optical lens of this embodiment nine is the same as table 6, and the aspherical surface coefficient table is the same as table 7. The numerical values of each related structural parameter in this embodiment nine are shown in table 9 below, and the specific description of the plurality of structural parameters is the same as the related description in the above-mentioned embodiment two, which will not be repeated here.

[0197] The on-axis chromatic aberration curves of the optical lenses in the embodiment seven, the embodiment eight and the embodiment nine are shown in Figure 14A , which represent the convergence focus deviation degree of light rays with different wavelengths after passing through the optical lens; the astigmatism curves of the optical lenses in the embodiment seven, the embodiment eight and the embodiment nine are shown in Figure 14B , which represent the meridional image surface curvature degree and the sagittal image surface curvature degree. According to Figure 14A and Figure 14B , it can be known that the optical lenses in the embodiment seven, the embodiment eight and the embodiment nine can all achieve good imaging quality.

[0198] In summary, in the embodiment one to the embodiment nine, the half of the maximum field of view angle 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 shown in table 8 below.

[0199] Table 8: Optical parameter table of optical lens

[0200]

[0201] In addition, the structural parameters of the optical lenses in the embodiment one to the embodiment nine are specifically shown in table 9.

[0202] Table 9: Structural parameter table of optical lens

[0203]

[0204] In summary, the optical lenses in the embodiment one to the embodiment nine satisfy the relationship shown in table 10, which is specifically shown in table 10.

[0205] Table 10: Relationship table satisfied by optical lens

[0206]

[0207] It is worth mentioning that, according to an aspect of the present application, one embodiment of the present application further provides a camera module which can include the optical lens and a photosensitive element arranged on the image side of the optical lens for imaging. It can be understood that the photosensitive element mentioned in the present application can be implemented as a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) but is not limited thereto, and the present application will not be described hereinafter.

[0208] In addition, according to another aspect of the present application, one embodiment of the present application further provides an electronic device which can include the camera module and a processor, the camera module being communicatively connected to the processor for acquiring image data and inputting the image data to the processor for processing. It can be understood that the electronic device mentioned in the present application can be implemented as a device such as a mobile phone equipped with the camera module but is not limited thereto, and the present application will not be described hereinafter.

[0209] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0210] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. An optical lens characterized in that: The optical lens comprises a lens barrel, a lens group and a spacer assembly accommodated in the lens barrel; the lens group is sequentially arranged from an object side to an image side along an optical axis as follows: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with negative refractive 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 comprises a second spacer element arranged on the image side of the second lens and in contact with the image side surface of the second lens, a third spacer element arranged on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element arranged 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 arranged 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 x 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 angle 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 interval distance between the second spacer element and the third spacer element along the optical axis.

2. The optical lens of claim 1, wherein, 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.

3. The optical lens of claim 2, wherein, The optical lens satisfies: 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 of claim 1, wherein, The optical lens satisfies: 3.05 < d0smin / d2m < 3.50; wherein d0smin is the minimum aperture of the object side end surface of the lens barrel, and d2m is the inner diameter of the image side surface of the second spacer element.

5. The optical lens of claim 1, wherein, 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.

6. The optical lens of claim 1, wherein, The optical lens satisfies: 2.36 ≤ CT2 / (CT1+CT3) ≤ 2.94; and 4.85 < EP02 / T12 < 7.20; CT2-CT1-CT3EP02 / T12 7. The optical lens of claim 1, wherein, The optical lens satisfies: 2.10≤DT21 / DT22<2.45; and 1.30<(R3+R4) / D2s<2.75; wherein DT21 is an effective radius of the object side surface of the second lens, DT22 is an effective radius of the image side surface of the second lens, R3 is a curvature radius of the object side surface of the second lens, R4 is a curvature radius of the image side surface of the second lens, and D2s is an outer diameter of the object side surface of the second spacer element.

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

9. The optical lens of claim 8, wherein, The optical lens satisfies: 1.60<|f6 / R12|<2.55; and 2.80<EP56 / CT6<3.55; wherein f6 is an effective focal length of the sixth lens, R12 is a curvature radius of the image side surface of the sixth lens, EP56 is a spacer distance of the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is a central thickness of the sixth lens.

10. The optical lens of claim 8, wherein, The optical lens satisfies: 1.00<D6s / D5m<1.10; and 1.10<d6s / d5m<1.55; wherein D6s is an outer diameter of the object side surface of the sixth spacer element, D5m is an outer diameter of the image side surface of the fifth spacer element, d6s is an inner diameter of the object side surface of the sixth spacer element, and d5m is an inner diameter of the image side surface of the fifth spacer element.

11. The optical lens of claim 1, wherein, The optical lens satisfies: 1.95<D7s / d6m<2.40; wherein D7s is an outer diameter of the object side surface of the seventh spacer element, and d6m is an inner diameter of the image side surface of the sixth spacer element.

12. The optical lens of claim 1, wherein, The optical lens satisfies: 21.50<(D6m-d6s) / (CP6x10)<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 of any of claims 1 to 12, wherein, 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 interval distance between the fourth spacer element and the fifth spacer element along the optical axis.

14. The optical lens of any of claims 1 to 11, wherein, The interval 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: 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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