Optical lens set

Abstract

The present application discloses an optical lens group, which sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power; a second lens with a negative optical power; a third lens with an optical power, the object side surface of which is concave; a fourth lens with an optical power; a fifth lens with a negative optical power; a sixth lens with an optical power, the object side surface of which is convex; and a seventh lens with an optical power. The optical lens group satisfies: 100×tan(FOV / 4) / TTL>5; and -2<f3 / f2<0, where FOV is the maximum field of view angle of the optical lens group, TTL is the distance along the optical axis from the object side surface of the first lens to the imaging surface of the optical lens group, f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and specifically, to an optical lens group including seven lenses. Background Art

[0002] In recent years, with the rapid development of electronic products, the application of the optical lens groups mounted on electronic products has become increasingly widespread. At the same time, along with the trend of the development of electronic products towards being thinner and lighter, the optical lens groups mounted thereon not only need to ensure good imaging quality, but also need to have appropriate sizes. Therefore, small-sized optical lens groups with good imaging quality are increasingly favored by manufacturers and consumers.

[0003] Since obstacle avoidance intelligent products usually need to detect the environment within a large field of view, there is an extremely high requirement for the optical lens groups mounted thereon to have a large field of view angle. In addition, considering the night working environment of obstacle avoidance intelligent products, it is also necessary for the optical lens groups to have a large aperture to ensure the light passing requirement at night. Therefore, the market demand for fish-eye lenses with the characteristic of a large aperture is also increasing. Summary of the Invention

[0004] On the one hand, the present application provides such an optical lens group, which may sequentially include, along the optical axis from the object side to the image side: a first lens with negative optical power; a second lens with negative optical power; a third lens with optical power, whose object side is concave; a fourth lens with optical power; a fifth lens with negative optical power; a sixth lens with optical power, whose object side is convex; and a seventh lens with optical power. The optical lens group can satisfy 100×tan(FOV / 4) / TTL>5; and -2<f3 / f2<0, where FOV is the maximum field of view angle of the optical lens group, TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the optical lens group, f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens.

[0005] In some embodiments, the optical lens group can satisfy: f / EPD<2, where f is the total effective focal length of the optical lens group, and EPD is the entrance pupil diameter of the optical lens group.

[0006] In some embodiments, the optical lens group can satisfy: -3<R6 / f<-2, where R6 is the curvature radius of the image side of the third lens, and f is the total effective focal length of the optical lens group.

[0007] In some embodiments, the optical lens group can satisfy: 1<R2 / R4<1.5, where R2 is the curvature radius of the image side of the first lens, and R4 is the curvature radius of the image side of the second lens.

[0008] In some embodiments, the optical lens group may satisfy: 0.5 < (CT4 - CT5) / (CT6 - CT7) < 2, where CT4 is the central thickness of the fourth lens along the optical axis, CT5 is the central thickness of the fifth lens along the optical axis, CT6 is the central thickness of the sixth lens along the optical axis, and CT7 is the central thickness of the seventh lens along the optical axis.

[0009] In some embodiments, the optical lens group may satisfy: 1.5 < f67 / f < 2.5, where f67 is the combined focal length of the sixth lens and the seventh lens, and f is the effective focal length of the optical lens group.

[0010] In some embodiments, the optical lens group may satisfy: 1 < CT3 / CT4 < 2, where CT3 is the central thickness of the third lens along the optical axis, and CT4 is the central thickness of the fourth lens along the optical axis.

[0011] In some embodiments, the optical lens group may satisfy: 0.8 < ET3 / CT3 < 1.2, where ET3 is the thickness of the third lens at the maximum effective diameter, and CT3 is the central thickness of the third lens along the optical axis.

[0012] In some embodiments, the optical lens group may satisfy: |(DT42 - DT22) / DT22| < 0.25, where DT42 is the effective radius of the image side of the fourth lens, and DT22 is the effective radius of the image side of the second lens.

[0013] In some embodiments, the optical lens group may satisfy: 0.5 < DT31 / DT42 < 1, where DT31 is the effective radius of the object side of the third lens, and DT42 is the effective radius of the image side of the fourth lens.

[0014] In some embodiments, the optical lens group may satisfy: 2 < (DT11 - ImgH) / (ImgH - DT72) < 5, where DT11 is the effective radius of the object side of the first lens, ImgH is half of the diagonal length of the effective pixel region on the imaging surface, and DT72 is the effective radius of the image side of the seventh lens.

[0015] In some embodiments, the optical lens group may satisfy: 0.7 < DT52 / DT61 < 1, where DT52 is the effective radius of the image side of the fifth lens, and DT61 is the effective radius of the object side of the sixth lens.

[0016] In some embodiments, the optical lens group further includes a diaphragm, where between the diaphragm and the object to be photographed, there are at least one lens made of plastic material and at least one lens made of glass material, and between the diaphragm and the imaging surface, there are at least three lenses made of plastic material.

[0017] In some embodiments, the optical lens group may satisfy: 0 < (N1 - N2) / (N3 - N2) < 2, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

[0018] In some embodiments, the optical lens group may satisfy: 0 < T67 / T56 < 0.5, where T67 is the axial distance between the sixth lens and the seventh lens, and T56 is the axial distance between the fifth lens and the sixth lens.

[0019] On the other hand, the present application provides an optical lens group which may sequentially include, from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with negative optical power; a third lens with optical power, whose object side is concave; a fourth lens with optical power; a fifth lens with negative optical power; a sixth lens with optical power, whose object side is convex; and a seventh lens with optical power. The optical lens group may satisfy: 100×tan(FOV / 4) / TTL > 5; and f / EPD < 2, where FOV is the maximum field of view angle of the optical lens group, TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the optical lens group, f is the total effective focal length of the optical lens group, and EPD is the entrance pupil diameter of the optical lens group.

[0020] In some embodiments, the optical lens group may satisfy: -3 < R6 / f < -2, where R6 is the radius of curvature of the image side of the third lens, and f is the total effective focal length of the optical lens group.

[0021] In some embodiments, the optical lens group may satisfy: 1 < R2 / R4 < 1.5, where R2 is the radius of curvature of the image side of the first lens, and R4 is the radius of curvature of the image side of the second lens.

[0022] In some embodiments, the optical lens group may satisfy: 0.5 < (CT4 - CT5) / (CT6 - CT7) < 2, where CT4 is the central thickness along the optical axis of the fourth lens, CT5 is the central thickness along the optical axis of the fifth lens, CT6 is the central thickness along the optical axis of the sixth lens, and CT7 is the central thickness along the optical axis of the seventh lens.

[0023] In some embodiments, the optical lens group may satisfy: 1.5 < f67 / f < 2.5, where f67 is the combined focal length of the sixth lens and the seventh lens, and f is the effective focal length of the optical lens group.

[0024] In some embodiments, the optical lens group may satisfy: 1 < CT3 / CT4 < 2, where CT3 is the central thickness along the optical axis of the third lens, and CT4 is the central thickness along the optical axis of the fourth lens.

[0025] In some embodiments, the optical lens group may satisfy: 0.8 < ET3 / CT3 < 1.2, where ET3 is the thickness of the third lens at the maximum effective diameter, and CT3 is the central thickness of the third lens along the optical axis.

[0026] In some embodiments, the optical lens group may satisfy: |(DT42 - DT22) / DT22| < 0.25, where DT42 is the effective radius of the image side of the fourth lens, and DT22 is the effective radius of the image side of the second lens.

[0027] In some embodiments, the optical lens group may satisfy: 0.5 < DT31 / DT42 < 1, where DT31 is the effective radius of the object side of the third lens, and DT42 is the effective radius of the image side of the fourth lens.

[0028] In some embodiments, the optical lens group may satisfy: 2 < (DT11 - ImgH) / (ImgH - DT72) < 5, where DT11 is the effective radius of the object side of the first lens, ImgH is half of the diagonal length of the effective pixel area on the imaging surface, and DT72 is the effective radius of the image side of the seventh lens.

[0029] In some embodiments, the optical lens group may satisfy: 0.7 < DT52 / DT61 < 1, where DT52 is the effective radius of the image side of the fifth lens, and DT61 is the effective radius of the object side of the sixth lens.

[0030] In some embodiments, the optical lens group may further include a diaphragm. There may be at least one lens made of plastic material and at least one lens made of glass material between the diaphragm and the object to be photographed, and there may be at least three lenses made of plastic material between the diaphragm and the imaging surface.

[0031] In some embodiments, the optical lens group may satisfy: 0 < (N1 - N2) / (N3 - N2) < 2, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

[0032] In some embodiments, the optical lens group may satisfy: -2 < f3 / f2 < 0, where f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens.

[0033] In some embodiments, the optical lens group may satisfy: 0 < T67 / T56 < 0.5, where T67 is the distance between the sixth lens and the seventh lens along the optical axis, and T56 is the distance between the fifth lens and the sixth lens along the optical axis. Description of the Drawings

[0034] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0035] Figure 1 A schematic structural diagram of an optical lens assembly according to Embodiment 1 of the present application is shown;

[0036] FIG. 2A to FIG. 2B The axial chromatic aberration curve and the astigmatism curve of the optical lens group of Example 1 are respectively shown;

[0037] Figure 3 A schematic structural diagram of an optical lens assembly according to Embodiment 2 of the present application is shown;

[0038] FIG. 4A to FIG. 4B The axial chromatic aberration curve and the astigmatism curve of the optical lens group of Example 2 are respectively shown;

[0039] Figure 5 A schematic structural diagram of an optical lens assembly according to Embodiment 3 of the present application is shown;

[0040] FIG. 6A to FIG. 6B The axial chromatic aberration curve and the astigmatism curve of the optical lens group of Example 3 are respectively shown;

[0041] Figure 7 A schematic structural diagram of an optical lens assembly according to Embodiment 4 of the present application is shown;

[0042] FIG. 8A to FIG. 8B The axial chromatic aberration curve and the astigmatism curve of the optical lens group of Example 4 are respectively shown;

[0043] Fig. 9 A schematic structural diagram of an optical lens assembly according to Example 5 of the present application is shown;

[0044] FIG. 10A to FIG. 10B The axial chromatic aberration curve and the astigmatism curve of the optical lens group of Example 5 are respectively shown. DETAILED DESCRIPTION

[0045] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only 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.

[0046] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0047] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0048] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens.

[0049] 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 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 listed 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.

[0050] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0051] 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 present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] The features, principles and other aspects of the present application are described in detail below.

[0053] The optical lens group according to an exemplary embodiment of the present application may include seven lenses with optical powers, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens to the seventh lens are arranged in sequence from the object side to the image side along the optical axis of the optical lens group, and there may be a spacing distance between any two adjacent lenses.

[0054] In the exemplary embodiment, the first lens may have a negative optical power, its object side may be a convex surface, and its image side may be a concave surface.

[0055] In the exemplary embodiment, the second lens may have a negative optical power, and its image side may be a concave surface.

[0056] In the exemplary embodiment, the third lens may have a positive optical power, its object side may be a concave surface, and its image side may be a convex surface.

[0057] In the exemplary embodiment, the fourth lens may have a positive optical power, and both its object side and image side may be convex surfaces.

[0058] In the exemplary embodiment, the fifth lens may have a negative optical power, and its image side may be a concave surface.

[0059] In the exemplary embodiment, the sixth lens may have a positive optical power, and its object side may be a convex surface.

[0060] In the exemplary embodiment, the optical lens group according to the present application may satisfy 100×tan(FOV / 4) / TTL > 5mm -1 , where FOV is the maximum field of view angle of the optical lens group, and TTL is the distance along the optical axis from the object side of the first lens to the imaging surface of the optical lens group. By reasonably allocating the maximum field of view angle and size of the optical lens group, the optical lens group can meet the requirement of small size on the basis of a large field of view angle, conforming to the imaging characteristics of a fish-eye lens. For example, FOV and TTL may satisfy 8.5mm -1 <100×tan(FOV / 4) / TTL < 11mm -1 .

[0061] In the exemplary embodiment, the optical lens group according to the present application may satisfy -2 < f3 / f2 < 0, where f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens. Satisfying -2 < f3 / f2 < 0 is beneficial to the reasonable distribution of the optical powers of the second lens and the third lens in the optical lens group, and thus is beneficial to reducing the aberration of the optical lens group and improving its imaging quality. For example, f3 and f2 may satisfy -2 < f3 / f2 < -1.

[0062] In an exemplary embodiment, the optical lens group according to the present application can satisfy f / EPD < 2, where f is the total effective focal length of the optical lens group, and EPD is the entrance pupil diameter of the optical lens group. Satisfying f / EPD < 2 can effectively ensure that the optical lens group can achieve the characteristics of a large aperture and a large light transmission amount.

[0063] In an exemplary embodiment, the optical lens group according to the present application can satisfy -3 < R6 / f < -2, where R6 is the curvature radius of the image side of the third lens, and f is the total effective focal length of the optical lens group. Satisfying -3 < R6 / f < -2 can control the curvature radius of the image side of the third lens, and further can control the contribution rate of its fifth-order spherical aberration to a certain extent to balance the fifth-order spherical aberration generated on the object side of the third lens, so that the fifth-order spherical aberration of the third lens is controlled within a reasonable range.

[0064] In an exemplary embodiment, the optical lens group according to the present application can satisfy 1 < R2 / R4 < 1.5, where R2 is the curvature radius of the image side of the first lens, and R4 is the curvature radius of the image side of the second lens. Satisfying 1 < R2 / R4 < 1.5 can effectively constrain the shapes of the first lens and the second lens, and further effectively improve the imaging quality of the optical lens group.

[0065] In an exemplary embodiment, the optical lens group according to the present application can satisfy 0.5 < (CT4 - CT5) / (CT6 - CT7) < 2, where CT4 is the central thickness of the fourth lens along the optical axis, CT5 is the central thickness of the fifth lens along the optical axis, CT6 is the central thickness of the sixth lens along the optical axis, and CT7 is the central thickness of the seventh lens along the optical axis. Satisfying 0.5 < (CT4 - CT5) / (CT6 - CT7) < 2 can balance the field curvature generated by the lenses in the rear position of the optical lens group with the field curvature generated by the lenses in the front position, so that the entire optical lens group has a reasonable field curvature.

[0066] In an exemplary embodiment, the optical lens group according to the present application can satisfy 1.5 < f67 / f < 2.5, where f67 is the combined focal length of the sixth lens and the seventh lens, and f is the effective focal length of the optical lens group. Satisfying 1.5 < f67 / f < 2.5 is beneficial to the reasonable distribution of the optical power of the sixth lens and the optical power of the seventh lens in the optical lens group, and is beneficial to reducing the aberration of the optical lens group.

[0067] In an exemplary embodiment, the optical lens group according to the present application can satisfy 1 < CT3 / CT4 < 2, where CT3 is the central thickness of the third lens along the optical axis, and CT4 is the central thickness of the fourth lens along the optical axis. Reasonably controlling the ratio of the central thickness of the third lens to the central thickness of the fourth lens can control the distortion contribution amounts of the third lens and the fourth lens within a reasonable range.

[0068] In an exemplary embodiment, the optical lens group according to the present application may satisfy 0.8 < ET3 / CT3 < 1.2, where ET3 is the thickness of the third lens at the maximum effective diameter, and CT3 is the central thickness of the third lens along the optical axis. Satisfying 0.8 < ET3 / CT3 < 1.2 is beneficial to reasonably control the ratio of the edge thickness to the central thickness of the third lens, and thus is beneficial to reducing the processing difficulty of the third lens.

[0069] In an exemplary embodiment, the optical lens group according to the present application may satisfy |(DT42 - DT22) / DT22| < 0.25, where DT42 is the effective radius of the image side of the fourth lens, and DT22 is the effective radius of the image side of the second lens. Reasonably controlling the maximum effective radius of the image side of the fourth lens and the maximum effective radius of the image side of the second lens is beneficial to controlling the size of the optical lens group, enabling the optical lens group to adapt to the miniaturization trend and improving its resolution.

[0070] In an exemplary embodiment, the optical lens group according to the present application may satisfy 0.5 < DT31 / DT42 < 1, where DT31 is the effective radius of the object side of the third lens, and DT42 is the effective radius of the image side of the fourth lens. Satisfying 0.5 < DT31 / DT42 < 1 is beneficial to reducing the size of the optical lens group, making the optical lens group adapt to the current miniaturization trend and helping to improve the resolution of the lens. For example, DT31 and DT42 may satisfy 0.7 < DT31 / DT42 < 1.

[0071] In an exemplary embodiment, the optical lens group according to the present application may satisfy 2 < (DT11 - ImgH) / (ImgH - DT72) < 5, where DT11 is the effective radius of the object side of the first lens, ImgH is half of the diagonal length of the effective pixel region on the imaging surface, and DT72 is the effective radius of the image side of the seventh lens. Satisfying 2 < (DT11 - ImgH) / (ImgH - DT72) < 5 is beneficial to ensuring the matching of the optical lens group with the effective pixel region on the imaging surface, that is, ensuring the matching of the optical lens group with the electronic photosensitive element on the imaging surface, so that the optical lens group has the characteristics of high pixels, low sensitivity, and easy processing. Optionally, DT11, DT72, and ImgH may satisfy 2 < (DT11 - ImgH) / (ImgH - DT72) < 3.

[0072] In an exemplary embodiment, the optical lens group according to the present application may satisfy 0.7 < DT52 / DT61 < 1, where DT52 is the effective radius of the image side of the fifth lens, and DT61 is the effective radius of the object side of the sixth lens. Satisfying 0.7 < DT52 / DT61 < 1 is beneficial to controlling the sizes of the fifth lens and the sixth lens, and thus controlling the overall size of the optical lens group, which is beneficial to obtaining better mechanical structure strength.

[0073] In an exemplary embodiment, the optical lens group may further include a diaphragm disposed between the object to be photographed and the imaging surface of the optical lens group. At least one lens made of plastic and at least one lens made of glass are disposed between the object to be photographed and the diaphragm. At least three lenses made of plastic are disposed between the diaphragm and the imaging surface. Reasonably selecting the materials of the lenses is beneficial to meeting the application of the optical lens group in an application scenario with a large temperature difference, reducing the temperature drift, and enabling the optical lens group to have excellent optical performance. In some exemplary embodiments, the first lens and the third lens may be glass lenses. In some exemplary embodiments, the third lens may be a glass aspherical lens.

[0074] In an exemplary embodiment, the optical lens group according to the present application may satisfy 0 < (N1 - N2) / (N3 - N2) < 2, where N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens. Reasonably selecting the materials of the lenses is beneficial to correcting the lateral chromatic aberration of the optical lens group to obtain better imaging performance. Optionally, N1, N2, and N3 may satisfy 0.5 < (N1 - N2) / (N3 - N2) < 1.

[0075] In an exemplary embodiment, the optical lens group according to the present application may satisfy 0 < T67 / T56 < 0.5, where T67 is the axial interval distance between the sixth lens and the seventh lens, and T56 is the axial interval distance between the fifth lens and the sixth lens. Satisfying 0 < T67 / T56 < 0.5 is beneficial to balancing the field curvature generated by the lens at the rear position of the optical lens group and the field curvature generated by the lens at the front position of the optical lens group, and thus is beneficial to the optical lens group having reasonable field curvature. For example, T67 and T56 may satisfy 0.1 < T67 / T56 < 0.4.

[0076] In an exemplary embodiment, the above optical lens group further includes a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0077] The optical lens group according to the above embodiment of the present application may use multiple lenses, such as the seven lenses described above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, the volume of the optical lens group can be effectively reduced and the processability of the optical lens group can be improved, making the optical lens group more conducive to production and processing and applicable to portable electronic products. The optical lens group configured as above can have characteristics such as a large field of view, a large aperture, a small size, and a high pixel count.

[0078] In the implementation of the present application, each lens mostly adopts aspherical lenses. In the example, at least one mirror surface from the object side of the second lens to the image side of the seventh lens is an aspherical lens. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration, that is, improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0079] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens group can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiments, the optical lens group is not limited to including seven lenses. If necessary, the optical lens group may also include other numbers of lenses.

[0080] Specific embodiments of the optical lens assembly applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0081] Example 1

[0082] The following reference Figures 1 to 2B An optical lens assembly according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens assembly according to Example 1 of the present application is shown.

[0083] like Figure 1 As shown, the optical lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0084] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive power, and its object side surface S13 is convex, and its image side surface S14 is convex. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0085] Table 1 shows basic parameters of the optical lens assembly of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0086]

[0087]

[0088] Table 1

[0089] In this example, the total effective focal length f of the optical lens group is 1.64 mm, the total length TTL of the optical lens group (i.e., the distance along the optical axis from the object-side surface S1 of the first lens E1 to the imaging surface S17 of the optical lens group) is 12.81 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical lens group is 3.13 mm, and the maximum field of view FOV of the optical lens group is 205.2°.

[0090] In Example 1, the object side surface and the image side surface of the first lens E1 are both spherical surfaces, and the object side surface and the image side surface of any lens from the second lens E2 to the seventh lens E7 are both aspherical surfaces. The surface shape x of the aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0091]

[0092] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Tables 2 and 3 give the high-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 S3-S14 in Example 1.

[0093] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.2260E-01 -1.0646E-01 7.0322E-02 -3.5231E-02 1.2996E-02 -3.5103E-03 6.9492E-04 S4 1.2109E-01 4.5369E-02 -3.6309E-01 6.9116E-01 -7.6990E-01 5.6410E-01 -2.8304E-01 S5 -2.6206E-03 -3.8377E-03 2.4408E-03 -1.6321E-03 4.2780E-04 -9.5274E-06 -5.7283E-06 S6 1.6823E-02 -8.6752E-03 8.5419E-03 -7.0745E-03 3.6961E-03 -9.9330E-04 1.0037E-04 S7 3.6872E-02 -1.8154E-02 7.7731E-03 -2.9965E-03 8.1778E-04 -1.6485E-04 2.6580E-05 S8 1.7815E-01 -2.8660E-01 2.3054E-01 -1.1832E-01 4.2044E-02 -1.0704E-02 1.9640E-03 S9 2.2612E-02 2.4477E-02 -2.4175E-01 3.7937E-01 -3.4421E-01 2.2244E-01 -1.0887E-01 S10 -2.8077E-01 4.9058E-01 -7.5345E-01 8.4362E-01 -6.9349E-01 4.2866E-01 -2.0058E-01 S11 -1.6349E-01 1.9562E-01 -2.2372E-01 2.2039E-01 -1.7636E-01 1.1053E-01 -5.3018E-02 S12 -7.6459E-01 1.9789E+00 -3.6629E+00 4.8534E+00 -4.6117E+00 3.1705E+00 -1.5927E+00 S13 -7.3932E-01 1.9588E+00 -3.6383E+00 4.8086E+00 -4.5501E+00 3.1106E+00 -1.5510E+00 S14 -7.7924E-02 2.1695E-01 -3.3098E-01 3.4476E-01 -2.5540E-01 1.3614E-01 -5.2367E-02

[0094] Table 2

[0095] Face number A18 A20 A22 A24 A26 A28 A30 S3 -1.0049E-04 1.0482E-05 -7.6703E-07 3.7333E-08 -1.0845E-09 1.4217E-11 0.0000E+00 S4 9.8231E-02 -2.3271E-02 3.6054E-03 -3.3064E-04 1.3677E-05 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 3.5986E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -3.1882E-06 1.9815E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -2.4901E-04 1.7482E-05 3.6236E-07 -2.0120E-07 1.3315E-08 0.0000E+00 0.0000E+00 S9 4.0376E-02 -1.1039E-02 2.1317E-03 -2.7246E-04 2.0427E-05 -6.4955E-07 -3.4831E-09 S10 7.0405E-02 -1.8126E-02 3.2901E-03 -3.9167E-04 2.6016E-05 -4.9225E-07 -2.6331E-08 S11 1.9159E-02 -5.1382E-03 1.0017E-03 -1.3729E-04 1.2483E-05 -6.7280E-07 1.6185E-08 S12 5.8800E-01 -1.5929E-01 3.1285E-02 -4.3344E-03 4.0166E-04 -2.2341E-05 5.6405E-07 S13 5.6724E-01 -1.5191E-01 2.9438E-02 -4.0170E-03 3.6600E-04 -1.9984E-05 4.9446E-07 S14 1.4493E-02 -2.8527E-03 3.8915E-04 -3.4945E-05 1.8571E-06 -4.4233E-08 0.0000E+00

[0096] Table 3

[0097] Figure 2A The axial chromatic aberration curve of the optical lens group of Example 1 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Figure 2B The astigmatism curve of the optical lens group of Example 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 2A to FIG. 2B It can be seen that the optical lens assembly provided in Example 1 can achieve good imaging quality.

[0098] Example 2

[0099] The following reference Figures 3 to 4B The optical lens assembly according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 3 A schematic structural diagram of an optical lens assembly according to Example 2 of the present application is shown.

[0100] like Figure 3 As shown, the optical lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0101] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0102] In this example, the total effective focal length f of the optical lens group is 1.53 mm, the total length TTL of the optical lens group is 13.00 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical lens group is 3.00 mm, and the maximum field of view FOV of the optical lens group is 198.0°.

[0103] Table 4 shows the basic parameters of the optical lens assembly of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 5 and 6 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspheric mirror surfaces S3-S14 in Example 2, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0104]

[0105] Table 4

[0106] Face number A4 A6 A8 A10 A12 A14 A16 S3 1.0956E-01 -8.8739E-02 6.1191E-02 -3.4759E-02 1.4952E-02 -4.7215E-03 1.0825E-03 S4 9.4591E-02 1.8091E-01 -8.5129E-01 1.8459E+00 -2.4990E+00 2.2501E+00 -1.3791E+00 S5 -6.6226E-03 -3.7858E-03 1.5814E-03 -3.2415E-04 -2.1444E-04 1.3660E-04 -1.8772E-05 S6 1.0971E-02 -8.5934E-03 1.1823E-02 -1.0012E-02 4.7574E-03 -1.1098E-03 8.8628E-05 S7 2.5145E-02 -1.4245E-02 1.3159E-02 -1.2375E-02 7.7958E-03 -3.1272E-03 7.5449E-04 S8 1.8564E-01 -3.3873E-01 3.0911E-01 -1.6593E-01 5.0908E-02 -5.7064E-03 -1.7737E-03 S9 8.0448E-03 1.9159E-01 -8.3472E-01 1.4659E+00 -1.5964E+00 1.2161E+00 -6.7551E-01 S10 -3.6012E-01 9.3189E-01 -1.9020E+00 2.6939E+00 -2.7345E+00 2.0366E+00 -1.1211E+00 S11 -2.7359E-01 5.0612E-01 -8.0791E-01 1.0255E+00 -1.0001E+00 7.3627E-01 -4.0552E-01 S12 -6.1587E-01 1.3547E+00 -2.4334E+00 3.3438E+00 -3.3679E+00 2.4621E+00 -1.3127E+00 S13 -5.4872E-01 1.2657E+00 -2.1630E+00 2.8065E+00 -2.7199E+00 1.9482E+00 -1.0314E+00 S14 -9.1125E-02 2.4355E-01 -2.9260E-01 2.1145E-01 -9.0081E-02 1.3705E-02 8.1334E-03

[0107] Table 5

[0108] Face number A18 A20 A22 A24 A26 A28 A30 S3 -1.7864E-04 2.0906E-05 -1.6870E-06 8.9006E-08 -2.7555E-09 3.7835E-11 0.0000E+00 S4 5.7677E-01 -1.6176E-01 2.9058E-02 -3.0181E-03 1.3772E-04 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 4.4581E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -9.8920E-05 5.3955E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 8.4614E-04 -1.5001E-04 1.2640E-05 -4.0228E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 2.7596E-01 -8.2024E-02 1.7228E-02 -2.4187E-03 2.0320E-04 -7.7096E-06 0.0000E+00 S10 4.5389E-01 -1.3303E-01 2.7372E-02 -3.7394E-03 3.0385E-04 -1.1088E-05 0.0000E+00 S11 1.6597E-01 -5.0010E-02 1.0911E-02 -1.6731E-03 1.7075E-04 -1.0403E-05 2.8612E-07 S12 5.1312E-01 -1.4693E-01 3.0476E-02 -4.4570E-03 4.3589E-04 -2.5584E-05 6.8142E-07 S13 4.0446E-01 -1.1709E-01 2.4697E-02 -3.6882E-03 3.6922E-04 -2.2206E-05 6.0596E-07 S14 -6.1881E-03 2.0605E-03 -4.0677E-04 4.8726E-05 -3.2565E-06 8.9523E-08 3.9401E-10

[0109] Table 6

[0110] Figure 4A The axial chromatic aberration curve of the optical lens group of Example 2 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Figure 4B The astigmatism curve of the optical lens group of Example 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 4A to FIG. 4BIt can be seen that the optical lens group provided in Example 2 can achieve good imaging quality.

[0111] Example 3

[0112] The following reference Figures 5 to 6B Describe the optical lens group according to Example 3 of the present application. Figure 5 A schematic structural diagram of an optical lens assembly according to Example 3 of the present application is shown.

[0113] like Figure 5 As shown, the optical lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0114] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has positive power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0115] In this example, the total effective focal length f of the optical lens group is 1.52 mm, the total length TTL of the optical lens group is 13.00 mm, half of the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical lens group is 3.09 mm, and the maximum field of view FOV of the optical lens group is 205.2°.

[0116] Table 7 shows the basic parameters of the optical lens assembly of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 8 and 9 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspheric mirror surfaces S3-S14 in Example 3, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0117]

[0118] Table 7

[0119]

[0120]

[0121] Table 8

[0122] Face number A18 A20 A22 A24 A26 A28 A30 S3 -9.5438E-05 9.6935E-06 -6.7944E-07 3.1114E-08 -8.3374E-10 9.8512E-12 0.0000E+00 S4 2.6096E-02 1.8289E-03 -1.8605E-03 3.4301E-04 -2.2111E-05 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 1.9133E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 9.8573E-05 -5.7678E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -4.6901E-03 6.0036E-04 -4.5064E-05 1.4795E-06 0.0000E+00 0.0000E+00 0.0000E+00 S9 3.0326E-01 -9.7746E-02 2.2055E-02 -3.2955E-03 2.9219E-04 -1.1613E-05 0.0000E+00 S10 3.7383E-01 -1.1045E-01 2.2827E-02 -3.1237E-03 2.5367E-04 -9.2367E-06 0.0000E+00 S11 -3.8699E-03 4.6911E-03 -1.7526E-03 3.7506E-04 -4.8574E-05 3.5495E-06 -1.1260E-07 S12 1.3368E-01 -3.3390E-02 6.1166E-03 -8.1253E-04 7.5316E-05 -4.4126E-06 1.2363E-07 S13 1.4123E-01 -3.6823E-02 7.0850E-03 -9.8353E-04 9.3521E-05 -5.4548E-06 1.4692E-07 S14 5.0457E-03 -5.6455E-04 1.2299E-05 5.3460E-06 -6.6313E-07 2.5718E-08 0.0000E+00

[0123] Table 9

[0124] Fig. 6A The axial chromatic aberration curve of the optical lens group of Example 3 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Figure 6B The astigmatism curve of the optical lens group of Example 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. FIG. 6A to FIG. 6B It can be seen that the optical lens group provided in Example 3 can achieve good imaging quality.

[0125] Example 4

[0126] The following reference Figures 7 to 8B Describe the optical lens group according to Example 4 of the present application. Figure 7 A schematic structural diagram of an optical lens assembly according to Example 4 of the present application is shown.

[0127] like Figure 7 As shown, the optical lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0128] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0129] In this example, the total effective focal length f of the optical lens group is 1.71 mm, the total length TTL of the optical lens group is 13.00 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical lens group is 3.00 mm, and the maximum field of view FOV of the optical lens group is 198.0°.

[0130] Table 10 shows the basic parameters of the optical lens assembly of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 11 and 12 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspheric mirror surfaces S3-S14 in Example 4, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0131]

[0132]

[0133] Table 10

[0134] Face number A4 A6 A8 A10 A12 A14 A16 S3 7.0718E-02 -4.5243E-02 2.2484E-02 -8.9866E-03 2.7002E-03 -5.8538E-04 8.8366E-05 S4 9.5880E-02 -3.6964E-02 5.6798E-03 1.8176E-02 -2.9074E-02 2.8288E-02 -1.9985E-02 S5 -2.0460E-03 -2.7381E-03 1.8029E-03 -1.3437E-03 2.9707E-04 2.3387E-05 -8.7859E-06 S6 1.8434E-02 -9.9955E-03 1.0915E-02 -9.8537E-03 5.4664E-03 -1.5755E-03 1.8917E-04 S7 3.8433E-02 -2.2239E-02 1.5524E-02 -1.1803E-02 6.7725E-03 -2.5717E-03 5.9511E-04 S8 5.1931E-02 -8.8336E-02 3.0119E-02 2.5555E-02 -3.3944E-02 1.8170E-02 -5.4663E-03 S9 -3.6332E-02 1.2913E-01 -3.9475E-01 6.1189E-01 -6.4849E-01 5.1481E-01 -3.0898E-01 S10 -2.2189E-01 4.3681E-01 -7.7503E-01 1.0339E+00 -1.0423E+00 8.0148E-01 -4.6670E-01 S11 -1.6053E-01 2.0673E-01 -2.4818E-01 2.4744E-01 -1.9431E-01 1.1775E-01 -5.4467E-02 S12 -4.0565E-01 7.7117E-01 -1.0243E+00 9.9447E-01 -7.1706E-01 3.8367E-01 -1.4971E-01 S13 -3.9449E-01 7.8014E-01 -1.0261E+00 9.3751E-01 -6.0013E-01 2.5833E-01 -6.2437E-02 S14 -5.9377E-02 1.4904E-01 -2.0749E-01 1.9228E-01 -1.2706E-01 6.1585E-02 -2.2060E-02

[0135] Table 11

[0136] Face number A18 A20 A22 A24 A26 A28 A30 S3 -8.6628E-06 4.4022E-07 5.2259E-09 -2.2812E-09 1.3137E-10 -2.6493E-12 0.0000E+00 S4 9.9508E-03 -3.2987E-03 6.7962E-04 -7.8025E-05 3.8033E-06 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -7.5270E-05 3.9630E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 9.1365E-04 -6.5685E-05 -1.4973E-06 3.5577E-07 0.0000E+00 0.0000E+00 0.0000E+00 S9 1.3790E-01 -4.4624E-02 1.0102E-02 -1.5103E-03 1.3354E-04 -5.2751E-06 0.0000E+00 S10 2.0252E-01 -6.4007E-02 1.4237E-02 -2.1042E-03 1.8498E-04 -7.3005E-06 0.0000E+00 S11 1.9036E-02 -4.9600E-03 9.4387E-04 -1.2684E-04 1.1357E-05 -6.0555E-07 1.4479E-08 S12 4.1106E-02 -7.3613E-03 6.7889E-04 1.7385E-05 -1.2351E-05 1.2953E-06 -4.7898E-08 S13 -1.0990E-03 7.1203E-03 -2.8400E-03 6.0949E-04 -7.7940E-05 5.5946E-06 -1.7413E-07 S14 5.8106E-03 -1.1077E-03 1.4826E-04 -1.3185E-05 6.9840E-07 -1.6655E-08 0.0000E+00

[0137] Table 12

[0138] Fig. 8A The axial chromatic aberration curve of the optical lens group of Example 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the lens group. Figure 8B The astigmatism curve of the optical lens group of Example 4 is shown, which indicates the meridional image plane curvature and the sagittal image plane curvature. FIG. 8A to FIG. 8B It can be seen that the optical lens group provided in Example 4 can achieve good imaging quality.

[0139] Example 5

[0140] The following reference Figures 9 to 10B Describe the optical lens group according to Example 5 of the present application. Fig. 9 A schematic structural diagram of an optical lens assembly according to Example 5 of the present application is shown.

[0141] like Fig. 9 As shown, the optical lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0142] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens has positive power, and its object side surface S13 is concave, and its image side surface S14 is convex. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0143] In this example, the total effective focal length f of the optical lens group is 1.60 mm, the total length TTL of the optical lens group is 13.00 mm, half the diagonal length ImgH of the effective pixel area on the imaging surface S17 of the optical lens group is 3.10 mm, and the maximum field of view FOV of the optical lens group is 205.2°.

[0144] Table 13 shows the basic parameters of the optical lens assembly of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 14 and 15 show the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspheric mirror surfaces S3-S14 in Example 5, wherein the surface shape of each aspheric surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0145]

[0146] Table 13

[0147]

[0148]

[0149] Table 14

[0150] Face number A18 A20 A22 A24 A26 A28 A30 S3 -4.0877E-05 4.0952E-06 -2.9392E-07 1.4300E-08 -4.2233E-10 5.7118E-12 0.0000E+00 S4 -3.7823E-02 1.3829E-02 -3.0830E-03 3.8768E-04 -2.1076E-05 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 2.9103E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -9.6275E-06 6.3657E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 3.5771E-03 -5.6470E-04 5.0850E-05 -1.9955E-06 0.0000E+00 0.0000E+00 0.0000E+00 S9 8.0230E-02 -2.3625E-02 4.9482E-03 -6.9395E-04 5.8258E-05 -2.2096E-06 0.0000E+00 S10 1.5259E-01 -4.4681E-02 9.2687E-03 -1.2857E-03 1.0672E-04 -4.0009E-06 0.0000E+00 S11 2.1135E-02 -5.8203E-03 1.1750E-03 -1.6803E-04 1.6049E-05 -9.1461E-07 2.3428E-08 S12 1.8588E-01 -4.6565E-02 8.5878E-03 -1.1361E-03 1.0225E-04 -5.6129E-06 1.4185E-07 S13 1.1998E-01 -2.4216E-02 3.3281E-03 -2.9130E-04 1.3815E-05 -1.7067E-07 -7.6320E-09 S14 1.4377E-02 -2.6576E-03 3.3900E-04 -2.8325E-05 1.3893E-06 -2.9742E-08 -4.4876E-11

[0151] Table 15

[0152] Fig. 10A The axial chromatic aberration curve of the optical lens group of Example 5 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the lens group. Fig. 10B The astigmatism curve of the optical lens group of Example 5 is shown, which indicates the meridional image plane curvature and the sagittal image plane curvature. FIG. 10A to FIG. 10B It can be seen that the optical lens group provided in Example 5 can achieve good imaging quality.

[0153] In summary, Examples 1 to 5 respectively satisfy the relationships shown in Table 16.

[0154] Conditional / Example 1 2 3 4 5 <![CDATA[100×tan(FOV / 4) / TTL(mm -1 )]]> 9.74 9.01 9.60 9.01 9.60 f3 / f2 -1.68 -1.37 -1.48 -1.53 -1.76 f / EPD 1.40 1.40 1.40 1.80 1.40 R6 / f -2.19 -2.18 -2.40 -2.06 -2.25 R2 / R4 1.37 1.33 1.42 1.28 1.35 (CT4-CT5) / (CT6-CT7) 0.72 1.51 1.26 0.66 0.67 f67 / f 1.91 2.21 2.46 2.05 1.96 CT3 / CT4 1.13 1.40 1.87 1.23 1.18 ET3 / CT3 1.00 0.97 0.99 0.99 0.98 |(DT42-DT22) / DT22| 0.19 0.02 0.01 0.01 0.16 DT31 / DT42 0.81 0.95 0.92 0.89 0.82 (DT11-ImgH) / (ImgH-DT72) 2.40 2.90 2.13 2.71 2.66 DT52 / DT61 0.90 0.81 0.82 0.83 0.85 (N1-N2) / (N3-N2) 0.76 0.76 0.76 0.76 0.76 T67 / T56 0.16 0.34 0.30 0.18 0.17

[0155] Table 16

[0156] The present application also provides a camera device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent camera device such as a digital camera, or a camera module integrated in a mobile electronic device such as a mobile phone. The camera device is equipped with the optical lens group described above.

[0157] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical lens assembly, characterized in that: Along the optical axis from the object side to the image side, they include: The first lens has a negative optical power, wherein the object side surface is convex in the paraxial region and the image side surface is concave in the paraxial region; The second lens has a negative optical power and its image side surface is concave in the paraxial region; The third lens element has positive power, and its object side surface is concave in the paraxial region, and its image side surface is convex in the paraxial region; The fourth lens element has positive refractive power, and its object side surface is convex in the paraxial region, and its image side surface is convex in the paraxial region; The fifth lens element has negative power and its image side surface is concave in the paraxial region; a sixth lens element having positive refractive power, whose object side surface is convex in the paraxial region; and a seventh lens having optical power; The number of lenses with optical power in the optical lens group is seven; The optical lens assembly satisfies: 9.01mm -1 ≤100×tan(FOV / 4) / TTL≤9.74mm -1 ;as well as -1.76≤f3 / f2≤-1.37, Among them, FOV is the maximum field of view of the optical lens group, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens group along the optical axis, f3 is the effective focal length of the third lens, and f2 is the effective focal length of the second lens.

2. The optical lens assembly according to claim 1, characterized in that: 1.40≤f / EPD≤1.80, Wherein, f is the total effective focal length of the optical lens group, and EPD is the entrance pupil diameter of the optical lens group.

3. The optical lens assembly according to claim 1, characterized in that: -2.40≤R6 / f≤-2.06, Wherein, R6 is the radius of curvature of the image side surface of the third lens, and f is the total effective focal length of the optical lens group.

4. The optical lens assembly according to claim 1, characterized in that: 1.28≤R2 / R4≤1.42, Wherein, R2 is the curvature radius of the image side surface of the first lens, and R4 is the curvature radius of the image side surface of the second lens.

5. The optical lens assembly according to claim 1, characterized in that: 0.66≤(CT4-CT5) / (CT6-CT7)≤1.51, Among them, CT4 is the center thickness of the fourth lens along the optical axis, CT5 is the center thickness of the fifth lens along the optical axis, CT6 is the center thickness of the sixth lens along the optical axis, and CT7 is the center thickness of the seventh lens along the optical axis.

6. The optical lens assembly according to claim 1, characterized in that: 1.91≤f67 / f<2.5, Wherein, f67 is the combined focal length of the sixth lens and the seventh lens, and f is the effective focal length of the optical lens group.

7. The optical lens assembly according to claim 1, characterized in that: 1.13≤CT3 / CT4≤1.87, Wherein, CT3 is the center thickness of the third lens along the optical axis, and CT4 is the center thickness of the fourth lens along the optical axis.

8. The optical lens assembly according to claim 1, characterized in that: 0.97≤ET3 / CT3≤1.00, Wherein, ET3 is the thickness of the third lens at the maximum effective diameter, and CT3 is the center thickness of the third lens along the optical axis.

9. The optical lens assembly according to claim 1, characterized in that: |(DT42-DT22) / DT22|≤0.19, Wherein, DT42 is the effective radius of the image side surface of the fourth lens, and DT22 is the effective radius of the image side surface of the second lens.

10. The optical lens assembly according to claim 1, characterized in that: 0.81≤DT31 / DT42<1, Wherein, DT31 is the effective radius of the object side surface of the third lens, and DT42 is the effective radius of the image side surface of the fourth lens.

11. The optical lens assembly according to claim 1, characterized in that: 2.13≤(DT11-ImgH) / (ImgH-DT72)≤2.90, Wherein, DT11 is the effective radius of the object side surface of the first lens, ImgH is half of the diagonal length of the effective pixel area on the imaging plane, and DT72 is the effective radius of the image side surface of the seventh lens.

12. The optical lens assembly according to claim 1, characterized in that: 0.81≤DT52 / DT61≤0.90, Wherein, DT52 is the effective radius of the image side surface of the fifth lens, and DT61 is the effective radius of the object side surface of the sixth lens.

13. The optical lens assembly according to claim 1, characterized in that: The optical lens group further includes a stop, There is at least one lens made of plastic and at least one lens made of glass between the aperture and the object. At least three lenses made of plastic are included between the aperture and the imaging surface.

14. The optical lens assembly according to claim 1, characterized in that: 0.76≤(N1-N2) / (N3-N2)<1, Wherein, N1 is the refractive index of the first lens, N2 is the refractive index of the second lens, and N3 is the refractive index of the third lens.

15. The optical lens assembly according to claim 1, characterized in that: 0.16≤T67 / T56≤0.34, Wherein, T67 is the distance between the sixth lens and the seventh lens along the optical axis, and T56 is the distance between the fifth lens and the sixth lens along the optical axis.

Images