Optical imaging lens assembly

Abstract

The application discloses an optical imaging lens group, comprising: a first lens group, which is composed of a first lens group first lens and a first lens group second lens; a second lens group, which is composed of a second lens group first lens; a third lens group, which is composed of a third lens group first lens and a third lens group second lens; a fourth lens group, which is composed of a fourth lens group first lens and a fourth lens group second lens; the second lens group, the third lens group and the fourth lens group are moved to realize the continuous zooming of the optical imaging lens group from a wide-angle end to a long-focus end; the axial distance TG3 from the object side of the third lens group first lens to the image side of the last lens of the third lens group and the axial distance TG4 from the object side of the fourth lens group first lens to the image side of the last lens of the fourth lens group satisfy the following relationship: 0.75 <= TG3 / TG4 <= 0.94. The application adopts a seven-piece optical imaging lens group of aspheric lenses, realizes the continuous zooming function through the movement of the lens group, and the imaging quality is good in the zooming process.

Description

[0001] This application is a divisional application of the invention patent application with the application date of August 31, 2020, the application number of 2020108937323, and the invention name of "Optical imaging lens group". TECHNICAL FIELD

[0002] The present application relates to the technical field of optical elements, in particular to an optical imaging lens group. BACKGROUND

[0003] With the rapid development of smart phones today, the market has put forward more extensive requirements for the optical performance and functional diversity of imaging lenses. At present, most mobile phones use digital zoom to achieve this function, but digital zoom also has its great limitations, which is caused by its zoom mechanism. When the user needs to zoom, the mobile phone first takes a picture without zooming, then "screenshots" the selected area, and after software processing, the target picture is obtained and stored in the album. Therefore, the quality of the picture will be reduced, and even unclear, blurred, etc.

[0004] Therefore, in order to enable users to have a better shooting experience, mobile phone lenses with continuous optical zoom function will become a new development trend. SUMMARY

[0005] Therefore, it is necessary to provide an optical imaging lens group, which realizes continuous zoom function through the movement of the lens group, and has good imaging quality during zooming.

[0006] The present application discloses an optical imaging lens group, which comprises, in order from the object side to the image side along the optical axis: a first lens group with optical power, wherein the image side surface of the lens closest to the imaging side is concave; a second lens group with optical power; a third lens group with optical power; a fourth lens group with negative optical power, wherein the image side surface of the lens closest to the imaging side is concave and contains at least one inflection point; wherein the first lens group is a fixed group, the second lens group, the third lens group and the fourth lens group move on the optical axis to realize continuous zoom of the optical imaging lens group from the wide-angle end to the long-focus end; the relative positions of the second lens group and the third lens group do not change, and they move on the optical axis at the same time; and the axial distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens group and the effective focal length ft of the optical imaging lens group at the long-focus end satisfy: 0.8 < TTL / ft < 1.5.

[0007] In one embodiment, the radius of curvature R32 of the image side surface of the first lens of the third lens group and the radius of curvature R33 of the object side surface of the second lens of the third lens group satisfy: 0.8 < R32 / R33 < 1.2.

[0008] In one embodiment, a radius of curvature R3L of an image side surface of the third lens group closest to the imaging surface satisfies: 0 < 10 x (R3L - R41) / (R3L + R41) < 1, where R41 is a radius of curvature of an object side surface of the first lens of the fourth lens group.

[0009] In one embodiment, a maximum value DTmax of an effective radius of each lens in the optical imaging lens group and a minimum value DTmin of the effective radius of each lens in the optical imaging lens group satisfy: 1 < DTmax / DTmin < 2.

[0010] In one embodiment, a sum ∑CT of central thicknesses of each lens in the optical imaging lens group and an on-axis distance TTL from an object side surface of the first lens of the optical imaging lens group to an image plane of the optical imaging lens group satisfy: 0.3 < ∑CT / TTL < 0.6.

[0011] In one embodiment, an on-axis distance TG3 from an object side surface of the first lens of the third lens group to an image side surface of the last lens of the third lens group and an on-axis distance TG4 from an object side surface of the first lens of the fourth lens group to an image side surface of the last lens of the fourth lens group satisfy: 0.5 < TG3 / TG4 < 1.

[0012] In one embodiment, a central thickness CT11 of the first lens of the first lens group and an edge thickness ET11 of the first lens of the first lens group satisfy: 0.5 < CT11 / ET11 < 1.

[0013] In one embodiment, an on-axis distance SAG42 from an intersection of an image side surface of the first lens of the fourth lens group and an optical axis to a vertex of an effective radius of the image side surface of the first lens of the fourth lens group and an on-axis distance SAG43 from an intersection of an object side surface of the second lens of the fourth lens group and the optical axis to a vertex of an effective radius of the object side surface of the second lens of the fourth lens group satisfy: 0.8 < SAG42 / SAG43 < 1.3.

[0014] In one embodiment, an effective focal length fG1 of the first lens group and an effective focal length fG3 of the third lens group satisfy: -1.2 < fG1 / fG3 < -0.7.

[0015] In one embodiment, an effective focal length fG4 of the fourth lens group and an effective focal length fw of the optical imaging lens group at a wide angle end satisfy: -1.5 < fG4 / fw < -0.9.

[0016] In one embodiment, a radius of curvature R1L of an image side surface of the last lens of the first lens group and a radius of curvature R21 of an object side surface of the first lens of the second lens group satisfy: 1 < R1L / R21 < 1.5.

[0017] In one embodiment, the displacement amount AG12 of the on-axis distance between the first lens group and the second lens group when the optical imaging lens changes from the wide-angle end to the telephoto end and the change amount Af of the effective focal length of the optical imaging lens when the optical imaging lens changes from the wide-angle end to the telephoto end satisfy: -0.6 < AG12 / Af < -0.3.

[0018] In one embodiment, the displacement amount AG34 of the on-axis distance between the third lens group and the fourth lens group when the optical imaging lens changes from the wide-angle end to the telephoto end and the change amount Af of the effective focal length of the optical imaging lens when the optical imaging lens changes from the wide-angle end to the telephoto end satisfy: -0.4 < AG34 / Af < -0.1.

[0019] Another aspect of the present application provides an optical imaging lens, which sequentially includes, along an optical axis from an object side to an image side: a first lens group with optical power, wherein an image side surface of a lens closest to the image side is concave; a second lens group with optical power; a third lens group with optical power; a fourth lens group with negative optical power, wherein an image side surface of a lens closest to the image side is concave and contains at least one inflection point; wherein the first lens group is a fixed group, the second lens group, the third lens group and the fourth lens group move on the optical axis to achieve continuous zooming of the optical imaging lens from a wide-angle end to a telephoto end; the relative positions of the second lens group and the third lens group are unchanged, and they move on the optical axis at the same time.

[0020] In one embodiment, the effective focal length fG1 of the first lens group and the effective focal length fG3 of the third lens group satisfy: -1.2 < fG1 / fG3 < -0.7.

[0021] In one embodiment, the on-axis distance TTL from the object side surface of the first lens group to the image plane of the optical imaging lens and the effective focal length ft of the optical imaging lens at the telephoto end satisfy: 0.8 < TTL / ft < 1.5.

[0022] In one embodiment, the radius of curvature R32 of the image side surface of the first lens of the third lens group and the radius of curvature R33 of the object side surface of the second lens of the third lens group satisfy: 0.8 < R32 / R33 < 1.2.

[0023] In one embodiment, the radius of curvature R3L of the image side surface of the lens closest to the image plane of the third lens group and the radius of curvature R41 of the object side surface of the first lens of the fourth lens group satisfy: 0 < 10 x (R3L-R41) / (R3L+R41) < 1.

[0024] In one embodiment, a maximum value DTmax of the effective radius of each lens in the optical imaging lens set and a minimum value DTmin of the effective radius of each lens in the optical imaging lens set satisfy: 1 < DTmax / DTmin < 2.

[0025] In one embodiment, a sum ∑CT of the center thickness of each lens in the optical imaging lens set and an on-axis distance TTL from the object side surface of the first lens to the image plane of the optical imaging lens set satisfy: 0.3 < ∑CT / TTL < 0.6.

[0026] In one embodiment, an on-axis distance TG3 from the object side surface of the first lens of the third lens set to the image side surface of the last lens of the three lens set and an on-axis distance TG4 from the object side surface of the first lens of the fourth lens set to the image side surface of the last lens of the fourth lens set satisfy: 0.5 < TG3 / TG4 ≤ 1.

[0027] In one embodiment, a center thickness CT11 of the first lens of the first lens set and an edge thickness ET11 of the first lens of the first lens set satisfy: 0.5 < CT11 / ET11 < 1.

[0028] In one embodiment, an on-axis distance SAG42 from the intersection of the image side surface of the first lens of the fourth lens set and the optical axis to the vertex of the effective radius of the image side surface of the first lens of the fourth lens set and an on-axis distance SAG43 from the intersection of the object side surface of the second lens of the fourth lens set and the optical axis to the vertex of the effective radius of the object side surface of the second lens of the fourth lens set satisfy: 0.8 < SAG42 / SAG43 < 1.3.

[0029] In one embodiment, an effective focal length fG4 of the fourth lens set and an effective focal length fw of the optical imaging lens set at the wide-angle end satisfy: -1.5 < fG4 / fw < -0.9.

[0030] In one embodiment, a radius of curvature R1L of the image side surface of the last lens in the first lens set and a radius of curvature R21 of the object side surface of the first lens of the second lens set satisfy: 1 < R1L / R21 < 1.5.

[0031] In one embodiment, when the optical imaging lens set changes from the wide-angle end to the telephoto end, a displacement amount ATG12 of the on-axis distance between the first lens set and the second lens set and a change amount Af of the effective focal length of the optical imaging lens set when the effective focal length changes from the wide-angle end to the telephoto end satisfy: -0.6 < ATG12 / Af < -0.3.

[0032] In one embodiment, the optical imaging lens set varies from wide angle end to telephoto end, the displacement amount of the on-axis distance between the third lens set and the fourth lens set TG34 and the variation amount of the effective focal length of the optical imaging lens set f satisfy: -0.4 < TG34 / f < -0.1.

[0033] In another aspect of the present application, an optical imaging lens set is provided, the radius of curvature R32 of the image side surface of the first lens of the third lens set and the radius of curvature R33 of the object side surface of the second lens of the third lens set satisfy: 0.8 < R32 / R33 < 1.2; and the radius of curvature R3L of the image side surface of the lens closest to the imaging surface of the third lens set and the radius of curvature R41 of the object side surface of the first lens of the fourth lens set satisfy: 0 < 10 x (R3L-R41) / (R3L+R41) < 1.

[0034] The present application provides a seven-piece optical imaging lens set using aspherical lenses, which realizes continuous zooming function through movement of the lens set, and has good imaging quality during zooming. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on the drawings shown.

[0036] Figure 1 The structure schematic diagram of the optical imaging lens set according to Embodiment 1 of the present application in a wide-angle state is shown;

[0037] Figure 2 The structure schematic diagram of the optical imaging lens set according to Embodiment 1 of the present application in an intermediate state during switching from the wide-angle state to the telephoto state is shown;

[0038] Figure 3 The structure schematic diagram of the optical imaging lens set according to Embodiment 1 of the present application in a telephoto state is shown;

[0039] Figures 4A-4D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens set in the wide-angle state of Embodiment 1 are shown respectively;

[0040] Figures 5A-5D The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens set in the intermediate state during switching from the wide-angle state to the telephoto state of Embodiment 1 are shown respectively;

[0041] Figures 6A-6D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens set of embodiment 1 in the long-focus state are shown respectively;

[0042] Figure 7 A structural schematic diagram of the optical imaging lens set according to embodiment 2 in the wide-angle state is shown;

[0043] Figure 8 A structural schematic diagram of the optical imaging lens set according to embodiment 2 in the intermediate state in the process of switching from the wide-angle state to the long-focus state is shown;

[0044] Figure 9 A structural schematic diagram of the optical imaging lens set according to embodiment 2 in the long-focus state is shown;

[0045] Figures 10A-10D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens set of embodiment 2 in the wide-angle state are shown respectively;

[0046] Figures 11A-11D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens set of embodiment 2 in the intermediate state in the process of switching from the wide-angle state to the long-focus state are shown respectively;

[0047] Figures 12A-12D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens set of embodiment 2 in the long-focus state are shown respectively;

[0048] Figure 13 A structural schematic diagram of the optical imaging lens set according to embodiment 3 in the wide-angle state is shown;

[0049] Figure 14 A structural schematic diagram of the optical imaging lens set according to embodiment 3 in the intermediate state in the process of switching from the wide-angle state to the long-focus state is shown;

[0050] Figure 15 A structural schematic diagram of the optical imaging lens set according to embodiment 3 in the long-focus state is shown;

[0051] Figures 16A-16D On-axis chromatic aberration curves, astigmatism curves, distortion curves and lateral chromatic aberration curves of the optical imaging lens set of embodiment 3 in the wide-angle state are shown respectively;

[0052] Figures 17A-17DThe axial chromatic aberration curves, the astigmatism curves, the distortion curves and the magnification chromatic aberration curves of the optical imaging lens set of embodiment 3 in the intermediate state during the switching from the wide-angle state to the long-focus state are shown respectively;

[0053] Figures 18A-18D The axial chromatic aberration curves, the astigmatism curves, the distortion curves and the magnification chromatic aberration curves of the optical imaging lens set of embodiment 3 in the long-focus state are shown respectively.

[0054] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0055] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It is to be understood that the detailed description is merely descriptive of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Throughout the specification, like reference numerals refer to like elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0056] It should be noted that in the present specification, the expressions first, second, third and the like 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.

[0057] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the sake of explanation. Specifically, the shape of the spherical surface or the aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0058] In the present specification, 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 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 imaging plane is referred to as the image side surface of the lens.

[0059] It should also be understood that the words "comprise," "comprising," "include," "including," and / or "has," "having," when used in this specification, specify the presence of stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or groups thereof. Furthermore, when describing the embodiments of the present application, the use of "or" means "and / or" unless strictly stated otherwise. Moreover, the use of "a" or "an" means "one or more" unless strictly stated otherwise. Additionally, the use of "an exemplary embodiment" or "one exemplary embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Furthermore, the use of the term "about" means that variations of plus or minus ten percent are encompassed unless otherwise stated.

[0060] 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 will be further 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 overly literal or overly formal sense unless expressly so defined herein.

[0061] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other if there is no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0062] The features, principles, and other aspects of the present application are described in detail below.

[0063] The optical imaging lens set according to the exemplary embodiments of the present application can include, for example, a lens set composed of seven lenses with optical power, i.e., a first lens set, a second lens set, a third lens set, and a fourth lens set. The four lens sets are arranged in order from the object side to the image side along the optical axis.

[0064] In the exemplary embodiments, the first lens set can have positive or negative optical power, wherein the image side surface of the lens closest to the imaging side is concave; the second lens set can have positive or negative optical power; the third lens set can have positive or negative optical power; and the fourth lens set has negative optical power, wherein the image side surface of the lens closest to the imaging side is concave and contains at least one inflection point; wherein the first lens set is a fixed set, the second lens set, the third lens set, and the fourth lens set move on the optical axis to achieve continuous zooming of the optical imaging lens set from the wide-angle end to the telephoto end; the relative positions of the second lens set and the third lens set do not change, and they move on the optical axis at the same time.

[0065] In exemplary embodiments, the optical imaging lens set of the present application can satisfy the condition formula 0.8 < TTL / ft < 1.5; wherein, TTL is the axial distance from the object side surface of the first lens to the imaging surface of the optical imaging lens set; ft is the effective focal length of the optical imaging lens set at the long-focus end. By controlling the total optical length of the imaging system within a reasonable range to achieve continuous zooming from the wide-angle end to the long-focus end, the ratio of TTL and ft is controlled on the one hand to control the volume of the whole module, and on the other hand to achieve the effect of 5 times optical zoom (equivalent focal length) at the long-focus end. More specifically, TTL and ft can satisfy: 1.24 ≤ TTL / ft ≤ 1.25.

[0066] In exemplary embodiments, the optical imaging lens set of the present application can satisfy the condition formula 0.8 < R32 / R33 < 1.2; wherein, R32 is the curvature radius of the image side surface of the first lens of the third lens set, and R33 is the curvature radius of the object side surface of the second lens of the third lens set. By constraining the ratio of the curvature radii of the two lenses to be close to 1.0, it is close to the double cemented form to reduce the lateral chromatic aberration of the system. More specifically, R32 and R33 can satisfy: 0.99 ≤ R32 / R33 ≤ 1.01.

[0067] In exemplary embodiments, the optical imaging lens set of the present application can satisfy the condition formula 0 < 10 × (R3L-R41) / (R3L+R41) < 1; wherein, R3L is the curvature radius of the image side surface of the lens closest to the imaging surface of the third lens set, and R41 is the curvature radius of the object side surface of the first lens of the fourth lens set. More specifically, R3L and R41 can satisfy: 0.48 ≤ 10 × (R3L-R41) / (R3L+R41) ≤ 0.61.

[0068] In exemplary embodiments, the optical imaging lens set of the present application can satisfy the condition formula 1 < DTmax / DTmin < 2; wherein, DTmax is the maximum value of the effective radius of each lens in the optical imaging lens set, and DTmin is the minimum value of the effective radius of each lens in the optical imaging lens set. Considering that the zoom system is actually adopted in the form of lens cutting edge, by controlling the ratio of the maximum value and the minimum value of the effective radius of each lens, the influence of the cutting edge on the relative luminance and other factors of the system is reduced as much as possible. More specifically, DTmax and DTmin can satisfy: 1.35 ≤ DTmax / DTmin ≤ 1.70.

[0069] In exemplary embodiments, the optical imaging lens set of the present application can satisfy the condition formula 0.3 < ∑CT / TTL < 0.6; wherein, ∑CT is the sum of the center thicknesses of each lens in the optical imaging lens set, and TTL is the axial distance from the object side surface of the first lens to the imaging surface of the optical imaging lens set. More specifically, ∑CT and TTL can satisfy: 0.44 ≤ ∑CT / TTL < 0.45.

[0070] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition 0.5 < TG3 / TG4 < 1; where TG3 is the on-axis distance from the object side surface of the first lens of the third lens group to the image side surface of the last lens of the third lens group, and TG4 is the on-axis distance from the object side surface of the first lens of the fourth lens group to the image side surface of the last lens of the fourth lens group. More specifically, TG3 and TG4 can satisfy: 0.75 < TG3 / TG4 < 0.94.

[0071] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition 0.5 < CT11 / ET11 < 1; where CT11 is the center thickness of the first lens of the first lens group, and ET11 is the edge thickness of the first lens of the first lens group. More specifically, CT11 and ET11 can satisfy: 0.77 < CT11 / ET11 < 0.86.

[0072] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition 0.8 < SAG42 / SAG43 < 1.3; where SAG42 is the on-axis distance from the intersection of the image side surface of the first lens of the fourth lens group and the optical axis to the vertex of the effective radius of the image side surface of the first lens of the fourth lens group, and SAG43 is the on-axis distance from the intersection of the object side surface of the second lens of the fourth lens group and the optical axis to the vertex of the effective radius of the object side surface of the second lens of the fourth lens group. More specifically, SAG42 and SAG43 can satisfy: 0.97 < SAG42 / SAG43 < 1.18.

[0073] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition -1.2 < fG1 / fG3 < -0.7; where fG1 is the effective focal length of the first lens group, and fG3 is the effective focal length of the third lens group. More specifically, fG1 and fG3 can satisfy: -1.07 < fG1 / fG3 < -0.80.

[0074] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition -1.5 < fG4 / fw < -0.9; where fG4 is the effective focal length of the fourth lens group, and fw is the effective focal length of the optical imaging lens assembly at the wide-angle end. More specifically, fG4 and fw can satisfy: -1.06 < fG4 / fw.

[0075] In exemplary embodiments, the optical imaging lens assembly of the present application can satisfy the condition 1 < R1L / R21 < 1.5; where R1L is the radius of curvature of the image side surface of the last lens of the first lens group, and R21 is the radius of curvature of the object side surface of the first lens of the second lens group. More specifically, R1L and R21 can satisfy: 1.08 < R1L / R21 < 1.22.

[0076] In an exemplary embodiment, the optical imaging lens assembly of the present application may satisfy the conditional equation: -0.6 < ΔTG12 / Δf < -0.3; where ΔTG12 is the displacement of the on-axis spacing between the first lens group and the second lens group when the optical imaging lens assembly shifts from the wide-angle end to the telephoto end, and Δf is the change in the effective focal length of the optical imaging lens assembly when shifting from the wide-angle end to the telephoto end. More specifically, ΔTG12 and Δf may satisfy: -0.48 ≤ ΔTG12 / Δf ≤ -0.46.

[0077] In an exemplary embodiment, the optical imaging lens assembly of the present application may satisfy the conditional equation: -0.4 < ΔTG34 / Δf < -0.1. ΔTG34 is the displacement of the on-axis spacing between the third lens group and the fourth lens group when the optical imaging lens assembly shifts from the wide-angle end to the telephoto end, and Δf is the change in the effective focal length of the optical imaging lens assembly when shifting from the wide-angle end to the telephoto end. More specifically, ΔTG34 and Δf satisfy the following: -0.22 ≤ ΔTG34 / Δf ≤ -0.17.

[0078] In an exemplary embodiment, the optical imaging lens system may further include at least one aperture. The aperture may be positioned appropriately as needed, for example, between the second lens element of the first lens group and the first lens element of the second lens group. Optionally, the optical imaging lens system may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0079] The various technical features of the optical imaging lens assembly of the above invention can be configured in combination to achieve corresponding effects.

[0080] The optical imaging lens system according to the above-described embodiment of the present application can utilize multiple lens groups, such as the four groups described above. By properly allocating the focal power, surface shape, center thickness of each lens, and the on-axis spacing between lenses, the overall optical length of the imaging system can be controlled within a reasonable range to achieve continuous zooming from the wide-angle end to the telephoto end, while maintaining good image quality during the zooming process.

[0081] However, those skilled in the art will appreciate that, without departing from the technical solutions claimed in this application, the number of lenses comprising the optical imaging lens assembly can be varied to achieve the various results and advantages described herein. For example, although seven lenses are described as an example in the embodiments, the optical imaging lens assembly is not limited to including seven lenses. If desired, the optical imaging lens assembly can also include other numbers of lenses.

[0082] Specific embodiments of the optical imaging lens assembly applicable to the above embodiments will be further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following refers to Figures 1-6D A structural schematic diagram of an optical imaging lens group according to Embodiment 1 of the present application is described, Figure 1 A structural schematic diagram of an optical imaging lens group according to Embodiment 1 of the present application is shown in a wide-angle state; Figure 2 A structural schematic diagram of an optical imaging lens group according to Embodiment 1 of the present application is shown in an intermediate state in the process of switching from a wide-angle state to a telephoto state; Figure 3 A structural schematic diagram of an optical imaging lens group according to Embodiment 1 of the present application is shown in a telephoto state.

[0085] As Figures 1-3 shown, the optical imaging lens group sequentially comprises, from the object side to the image side, a first lens group G1, a stop STO, a second lens group G2, a third lens group G3, a fourth lens group G4, a filter P, and an imaging surface IMA.

[0086] The first lens group G1 comprises a first lens E11 and a second lens E12, the first lens E11 has a negative focal power, the object side S11 thereof is a convex surface, and the image side S12 thereof is a concave surface; the second lens E12 has a negative focal power, the object side S13 thereof is a convex surface, and the image side S14 thereof is a concave surface; the second lens group G2 comprises a first lens E21 having a positive focal power, the object side S21 thereof is a convex surface, and the image side S22 thereof is a convex surface; the third lens group G3 comprises a first lens E31 and a second lens E32, the first lens E31 has a negative focal power, the object side S31 thereof is a concave surface, and the image side S32 thereof is a concave surface; the second lens E32 has a positive focal power, the object side S33 thereof is a convex surface, and the image side S34 thereof is a convex surface; the fourth lens group G4 comprises a first lens E41 and a second lens E42, the first lens E41 has a positive focal power, the object side S41 thereof is a concave surface, and the image side S42 thereof is a convex surface; the second lens E42 has a negative focal power, the object side S43 thereof is a concave surface, and the image side S44 thereof is a concave surface. Light from an object sequentially passes through the surfaces S11 to S42 and is finally imaged on the imaging surface IMA.

[0087] Table 1 shows the basic parameters of the optical imaging lens group of the present embodiment 1, wherein the radius of curvature, the thickness, and the focal length are all in millimeter units.

[0088] Surface Number Surface Type Radius of Curvature Thickness Focal Length Refractive Index Dispersion Coefficient Conic Coefficient OBJ Sphere Infinity Infinity S11 Asphere 77.0211 2.1337 -26.95 1.55 56.1 90.6600 S12 Asphere 12.2384 0.0800 8.7626 S13 Asphere 7.3054 2.1500 -9002.52 1.68 19.2 -2.6459 S14 Asphere 6.4286 T1 -6.8106 STO Sphere Infinity -0.6652 S21 Asphere 5.9340 1.9577 10.01 1.55 56.1 -1.1674 S22 Asphere -61.6991 3.3848 -15.6786 S31 Asphere -21.0801 0.6855 -8.01 1.67 20.4 28.6426 S32 Asphere 7.2515 0.1306 3.1527 S33 Asphere 7.1569 2.1500 7.01 1.57 37.3 1.6417 S34 Asphere -8.0979 T2 4.8587 S41 Asphere -7.2261 2.1500 15.95 1.68 19.2 -11.2759 S42 Asphere -4.8548 0.0600 -1.2714 S43 Asphere -23.0075 1.7653 -8.13 1.54 55.7 38.8935 S44 Asphere 5.5322 T3 -11.1038 Asphere SP1 Sphere 0.2100 1.52 64.2 Infinity SP2 Sphere 1.3558 Infinity IMA Sphere

[0089] Table 1

[0090] The following Table 2 gives the corresponding values of T1, T2, and T3 in millimeters of the optical imaging lens group of the present embodiment 1 in the wide-angle state (W), the intermediate state (M), and the telephoto state (T) in the zooming process.

[0091] W M T T1 6.0146 3.5713 1.7033 T2 4.0863 2.7214 2.4735 T3 1.3608 5.1681 7.2850

[0092] Table 2

[0093] In Example 1, the total effective focal length f of the optical imaging lens group is 3.69 mm, the on-axis distance TTL from the object-side surface S11 of the first lens E11 to the imaging surface IMA is 29.01 mm, and the value ImgH, which is half the diagonal length of the effective pixel area on the imaging surface IMA, is 4.08 mm.

[0094] In the first embodiment, the axial distance TTL from the object side of the first lens to the image plane of the optical imaging lens group and the effective focal length ft of the optical imaging lens group at the telephoto end are related by the formula TTL / ft=1.24, which satisfies 0.8 <TTL / ft<1.5。

[0095] In the first embodiment, the curvature radius R32 of the image side surface of the first lens of the third lens group and the curvature radius R33 of the object side surface of the second lens of the third lens group are in the relationship R32 / R33=1.01, which satisfies 0.8 <R32 / R33<1.2。

[0096] In this first embodiment, the curvature radius R3L of the image-side surface of the lens of the third lens group closest to the imaging surface and the curvature radius R41 of the object-side surface of the first lens of the fourth lens group are related by the equation 10×(R3L−R41) / (R3L+R41)=0.57, satisfying 0<10×(R3L−R41) / (R3L+R41)<1.

[0097] In the first embodiment, the maximum effective radius DTmax of each lens in the optical imaging lens group and the minimum effective radius DTmin of each lens in the optical imaging lens group are related by the formula DTmax / DTmin=1.36, which satisfies 1 <DTmax / DTmin<2。

[0098] In the first embodiment, the sum of the center thicknesses ∑CT of the lenses in the optical imaging lens group and the on-axis distance TTL from the object side of the first lens to the image plane of the optical imaging lens group are related by the equation ∑CT / TTL=0.45, satisfying 0.3<∑CT / TTL<0.6.

[0099] In the first embodiment, the axial distance TG3 between the object-side surface of the first lens of the third lens group and the image-side surface of the last lens of the third lens group and the axial distance TG4 between the object-side surface of the first lens of the fourth lens group and the image-side surface of the last lens of the fourth lens group satisfy the relationship TG3 / TG4=0.75, which satisfies 0.5 <TG3 / TG4≤1。

[0100] In the first embodiment, the center thickness CT11 of the first lens of the first lens group and the edge thickness ET11 of the first lens of the first lens group are related by the equation CT11 / ET11=0.86, which satisfies 0.5 <CT11 / ET11<1。

[0101] In the first embodiment, the on-axis distance SAG42 between the intersection of the image side surface of the first lens of the fourth lens group and the optical axis and the vertex of the effective radius of the image side surface of the first lens of the fourth lens group, and the on-axis distance SAG43 between the intersection of the object side surface of the second lens of the fourth lens group and the optical axis and the vertex of the effective radius of the object side surface of the second lens of the fourth lens group, satisfy the relationship SAG42 / SAG43 = 1.01, and 0.8 < SAG42 / SAG43 < 1.3.

[0102] In the first embodiment, the effective focal length fG1 of the first lens group and the effective focal length fG3 of the third lens group satisfy the relationship fG1 / fG3 = -0.80, and -1.2 < fG1 / fG3 < -0.7.

[0103] In the first embodiment, the effective focal length fG4 of the fourth lens group and the effective focal length fw of the optical imaging lens group at the wide-angle end satisfy the relationship fG4 / fw = -1.06, and -1.5 < fG4 / fw < -0.9.

[0104] In the first embodiment, the radius of curvature R1L of the image side surface of the last lens in the first lens group and the radius of curvature R21 of the object side surface of the first lens of the second lens group satisfy the relationship R1L / R21 = 1.08, and 1 < R1L / R21 < 1.5.

[0105] In the first embodiment, the displacement amount TG12 of the on-axis distance between the first lens group and the second lens group when the optical imaging lens group changes from the wide-angle end to the telephoto end and the change amount Af of the effective focal length of the optical imaging lens group when the optical imaging lens group changes from the wide-angle end to the telephoto end satisfy the relationship TG12 / Af = -0.46, and -0.6 < TG12 / Af < -0.3.

[0106] In the first embodiment, the displacement amount TG34 of the on-axis distance between the third lens group and the fourth lens group when the optical imaging lens group changes from the wide-angle end to the telephoto end and the change amount Af of the effective focal length of the optical imaging lens group when the optical imaging lens group changes from the wide-angle end to the telephoto end satisfy the relationship TG34 / Af = -0.17, and -0.4 < TG34 / Af < -0.1.

[0107] Table 3 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces S11-S44 that can be used in the first embodiment of the present application.

[0108] Infinity A4 A6 A8 A10 A12 A14 A16 A18 A20 S11 1.7320E-03 -7.0214E-05 -1.1470E-05 5.1188E-06 -1.0340E-06 1.2738E-07 -9.6505E-09 4.1306E-10 -7.6558E-12 S12 5.7306E-03 -1.4445E-03 2.9460E-04 -4.0645E-05 3.2852E-06 -8.5940E-08 -7.7646E-09 5.6549E-10 -7.4643E-12 S13 2.2606E-03 -1.0987E-03 2.5281E-04 -3.9135E-05 4.0114E-06 -2.4004E-07 6.1069E-09 0.0000E+00 0.0000E+00 S14 8.2802E-05 -1.3538E-04 1.2586E-05 -8.2531E-07 5.2087E-08 -5.8732E-09 3.2657E-10 0.0000E+00 0.0000E+00 S21 4.5573E-04 1.7058E-05 -7.2266E-06 1.7195E-06 -2.4472E-07 1.8367E-08 -6.2840E-10 0.0000E+00 0.0000E+00 S22 -4.8585E-05 8.2477E-06 -7.1332E-06 1.7059E-06 -2.4107E-07 1.7357E-08 -6.0940E-10 0.0000E+00 0.0000E+00 S31 -4.7413E-03 4.8916E-04 -2.9640E-05 1.0947E-05 -2.7181E-06 2.6660E-07 -1.0440E-08 0.0000E+00 0.0000E+00 S32 -2.6277E-03 -5.4755E-04 2.3114E-04 -2.1523E-05 -3.6360E-07 1.2387E-07 -4.9954E-09 0.0000E+00 0.0000E+00 S33 2.2116E-03 -1.1841E-03 2.8817E-04 -2.9970E-05 9.2912E-07 5.5676E-08 -3.4509E-09 0.0000E+00 0.0000E+00 S34 1.7460E-03 2.3713E-05 1.6335E-05 -2.8835E-06 4.9531E-07 -3.6875E-08 2.1725E-09 0.0000E+00 0.0000E+00 S41 6.9226E-04 -2.0042E-04 4.7269E-05 -2.1829E-06 -4.2673E-07 6.2684E-08 -2.2860E-09 0.0000E+00 0.0000E+00 S42 8.9382E-04 -6.3466E-04 1.4789E-04 -1.1275E-05 -1.6859E-07 5.2297E-08 -1.1045E-09 0.0000E+00 0.0000E+00 S43 -1.2194E-02 3.1274E-04 6.3982E-05 9.0957E-06 -3.8133E-06 3.5525E-07 -1.0570E-08 0.0000E+00 0.0000E+00 S44 -5.7033E-03 4.9569E-04 -2.5306E-05 1.0755E-06 -1.0597E-07 8.1129E-09 -2.2723E-10 0.0000E+00 0.0000E+00

[0109] Table 3

[0110] Surface Number ,Figure 4A 、 Figure 5A Fig. 6 shows the on-axis chromatic aberration curves of the optical imaging lens set of embodiment 1 in wide-angle state, intermediate state and long-focus state, respectively, which represent the deviation of convergent focal points of light rays of different wavelengths after passing through the lens. Figure 6A 、 Figure 4B 、 Figure 5B Fig. 7 shows the astigmatism curves of the optical imaging lens set of embodiment 1 in wide-angle state, intermediate state and long-focus state, respectively, which represent the meridional image surface curvature and sagittal image surface curvature. Figure 6B 、 Figure 4C 、 Figure 5C Fig. 8 shows the distortion curves of the optical imaging lens set of embodiment 1 in wide-angle state, intermediate state and long-focus state, respectively, which represent the distortion size values corresponding to different image heights. Figure 6C 、 Figure 4D 、 Figure 5D Fig. 9 shows the rate of change of magnification curves of the optical imaging lens set of embodiment 1 in wide-angle state, intermediate state and long-focus state, respectively, which represent the deviation of different image heights on the imaging surface after passing through the lens. According to Figure 6D it can be known that the optical imaging lens set given by embodiment 1 can achieve good imaging quality in each state.

[0111] Embodiment 2

[0112] Hereinafter, the structure schematic diagram of the optical imaging lens set according to embodiment 2 of the present application is described with reference to Figures 4A-6D Fig. 10 shows the structure schematic diagram of the optical imaging lens set according to embodiment 2 of the present application in wide-angle state; Figures 7-12D Fig. 11 shows the structure schematic diagram of the optical imaging lens set according to embodiment 2 of the present application in intermediate state during switching from wide-angle state to long-focus state; Figure 7 Fig. 12 shows the structure schematic diagram of the optical imaging lens set according to embodiment 2 of the present application in long-focus state. Figure 8 As shown in

[0113] Fig. 10, the optical imaging lens set sequentially comprises, from the object side to the image side, a first lens set G1, a stop STO, a second lens set G2, a third lens set G3, a fourth lens set G4, a filter P and an imaging surface IMA. Figure 9

[0114] ​​​​​​​​​​​​​​​The first lens group G1 includes a first lens E11 having a negative focal power, a convex object side surface S11 and a concave image side surface S12, and a second lens E12 having a positive focal power, a convex object side surface S13 and a concave image side surface S14. The second lens group G2 includes a first lens E21 having a positive focal power, a convex object side surface S21 and a convex image side surface S22. The third lens group G3 includes a first lens E31 having a negative focal power, a convex object side surface S31 and a concave image side surface S32, and a second lens E32 having a positive focal power, a convex object side surface S33 and a convex image side surface S34. The fourth lens group G4 includes a first lens E41 having a positive focal power, a concave object side surface S41 and a convex image side surface S42, and a second lens E42 having a negative focal power, a concave object side surface S43 and a concave image side surface S44. Light from an object passes through the surfaces S11 to S42 in sequence and is finally imaged on an image plane IMA.

[0115] The basic parameters of the optical imaging lens group of the second embodiment are shown in Table 4, wherein the radius of curvature, the thickness and the focal length are all in millimeter unit.

[0116] Figures 7-9 Surface Number Surface Type Radius of Curvature Thickness Focal Length Refractive Index Dispersion Coefficient Conic Coefficient OBJ Sphere Infinity S11 Infinity 78.9982 2.1500 -26.59 1.55 56.1 98.4032 S12 Asphere 12.1522 0.1037 8.6978 S13 Asphere 7.2509 2.1478 422.88 1.68 19.2 -2.7453 S14 Asphere 6.5481 T1 -6.8098 Asphere STO Sphere -0.6793 S21 Infinity 5.5114 1.6874 10.17 1.55 56.1 -1.0650 S22 Asphere 600.0000 3.1672 99.0000 S31 Asphere -20.6327 0.7246 -7.99 1.67 20.4 30.7808 S32 Asphere 7.2932 0.2785 3.1627 S33 Asphere 7.1854 2.1500 7.00 1.57 37.3 1.6338 S34 Asphere -8.0357 T2 4.8228 S41 Asphere -7.2952 2.1500 18.24 1.68 19.2 -11.5904 S42 Asphere -5.1367 0.0600 -1.3754 S43 Asphere -31.5606 1.8030 -8.66 1.54 55.7 37.5961 S44 Asphere 5.5651 T3 -10.0349 Asphere Asphere SP1 0.2100 1.52 64.2 Sphere Infinity SP2 1.4029 Sphere Infinity IMA

[0117] Table 4

[0118] The following Table 5 shows the corresponding values of T1, T2 and T3 in millimeter unit of the optical imaging lens group of the second embodiment in the wide angle state (W), the intermediate state (M) and the telephoto state (T) during the zooming process.

[0119] W M T T1 6.0896 3.6035 1.7178 T2 4.2803 2.7833 2.4491 T3 1.2842 5.2664 7.4874

[0120] Table 5

[0121] The following Table 6 shows the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces S11 to S44 which can be used in the second embodiment.

[0122]

[0123]

[0124] Table 6

[0125] Sphere 、 Infinity 、 Figure 10AFigures 6A, 6B and 6C respectively show the on-axis chromatic aberration curves of the optical imaging lens assembly of Example 2 in the wide-angle state, the intermediate state and the telephoto state, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Figure 11A , Figure 12A , Figure 10B Figures 7A, 7B and 7C respectively show the astigmatism curves of the optical imaging lens assembly of Example 2 in the wide-angle state, the intermediate state and the telephoto state, which represent the meridional image curvature and the sagittal image curvature. Figure 11B , Figure 12B , Figure 10C Figures 8A, 8B and 8C respectively show the distortion curves of the optical imaging lens assembly of Example 2 in the wide-angle state, the intermediate state and the telephoto state, which represent the distortion values corresponding to different image heights. Figure 11C , Figure 12C , Figure 10D Figures 9A, 9B and 9C respectively show the lateral chromatic aberration curves of the optical imaging lens assembly of Example 2 in the wide-angle state, the intermediate state and the telephoto state, which represent the deviation of the image heights on the imaging plane after passing through the lens. It can be seen from Figure 11D that the optical imaging lens assembly of Example 2 can achieve good imaging quality in each state.

[0126] Example 3

[0127] The structure of the optical imaging lens assembly according to Example 3 of the present application is described below with reference to Figure 12D Figures 10A, 10B and 10C respectively show the structure of the optical imaging lens assembly according to Example 3 of the present application in the wide-angle state, the intermediate state and the telephoto state. Figures 10A-12D Figure 10A shows the structure of the optical imaging lens assembly according to Example 3 of the present application in the wide-angle state. Figures 13-18D Figure 10B shows the structure of the optical imaging lens assembly according to Example 3 of the present application in the intermediate state during switching from the wide-angle state to the telephoto state. Figure 13 Figure 10C shows the structure of the optical imaging lens assembly according to Example 3 of the present application in the telephoto state.

[0128] As shown in Figure 14 , the optical imaging lens assembly comprises, in order from the object side to the image side, a first lens group G1, a stop STO, a second lens group G2, a third lens group G3, a fourth lens group G4, a filter P and an imaging plane IMA.

[0129] The first lens group G1 includes a first lens E11 having a negative focal power, a convex object side surface S11 and a concave image side surface S12, and a second lens E12 having a positive focal power, a convex object side surface S13 and a concave image side surface S14. The second lens group G2 includes a first lens E21 having a positive focal power, a convex object side surface S21 and a concave image side surface S22. The third lens group G3 includes a first lens E31 having a negative focal power, a concave object side surface S31 and a concave image side surface S32, and a second lens E32 having a positive focal power, a convex object side surface S33 and a convex image side surface S34. The fourth lens group G4 includes a first lens E41 having a positive focal power, a concave object side surface S41 and a convex image side surface S42, and a second lens E42 having a negative focal power, a convex object side surface S43 and a concave image side surface S44. Light from an object passes through the surfaces S11 to S42 in sequence and is finally imaged on the image plane IMA.

[0130] The basic parameters of the optical imaging lens group of the present embodiment 3 are shown in Table 7, wherein the radius of curvature, the thickness and the focal length are all in millimeter unit.

[0131]

[0132]

[0133] The following Table 8 gives the corresponding values of T1, T2 and T3 of the optical imaging lens group of the present embodiment 3 in the wide angle state (W), the intermediate state (M) and the telephoto state (T) during the zooming process, in millimeter unit.

[0134] W M T T1 5.9255 3.6458 1.4913 T2 4.3852 2.8287 2.3169 T3 1.2785 5.1137 7.7809

[0135] Table 8

[0136] The following Table 9 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspheric surfaces S11 to S44 which can be used in the present embodiment 3.

[0137] Figure 15 A4 A6 A8 A10 A12 A14 A16 A18 A20 S11 1.7519E-03 -8.4968E-05 -2.7053E-06 2.8900E-06 -6.8242E-07 8.9990E-08 -6.9924E-09 2.9902E-10 -5.4525E-12 S12 4.6979E-03 -1.2726E-03 3.2030E-04 -5.3234E-05 5.0150E-06 -1.8541E-07 -6.6483E-09 6.7721E-10 -1.1634E-11 S13 1.7012E-03 -9.6367E-04 2.6962E-04 -4.8079E-05 5.2299E-06 -3.1034E-07 7.4897E-09 0.0000E+00 0.0000E+00 S14 -3.0592E-06 -1.3223E-04 2.3527E-05 -4.2572E-06 5.4248E-07 -4.0389E-08 1.2857E-09 0.0000E+00 0.0000E+00 S21 5.3271E-04 3.4064E-05 -1.3962E-05 4.4389E-06 -6.7983E-07 5.3349E-08 -1.8027E-09 0.0000E+00 0.0000E+00 S22 -2.3865E-04 2.6723E-05 -1.4656E-05 5.7274E-06 -9.8655E-07 8.1864E-08 -2.8631E-09 0.0000E+00 0.0000E+00 S31 -3.6251E-03 3.3893E-05 6.7904E-05 5.0169E-06 -5.0307E-06 7.3083E-07 -3.5311E-08 0.0000E+00 0.0000E+00 S32 -2.3074E-03 -5.4711E-04 2.2523E-04 -1.7648E-05 -3.3846E-06 6.4089E-07 -3.0850E-08 0.0000E+00 0.0000E+00 S33 9.7171E-04 -5.7686E-04 1.3880E-04 -1.1778E-05 -3.1137E-07 1.0857E-07 -4.5245E-09 0.0000E+00 0.0000E+00 S34 2.0296E-03 -1.0695E-06 3.0586E-05 -6.0590E-06 1.3086E-06 -1.3730E-07 6.3662E-09 0.0000E+00 0.0000E+00 S41 7.4453E-04 -1.9013E-04 4.7527E-05 -3.2779E-06 -1.9849E-07 4.2908E-08 -1.7166E-09 0.0000E+00 0.0000E+00 S42 -2.3086E-05 -9.2457E-05 5.1578E-05 -5.4884E-06 2.4650E-07 -1.2550E-08 1.0484E-09 0.0000E+00 0.0000E+00 S43 -1.4133E-02 8.5908E-04 2.1601E-05 -5.5745E-06 -6.1231E-08 3.1774E-08 -6.2981E-10 0.0000E+00 0.0000E+00 S44 -7.6202E-03 8.8118E-04 -7.6669E-05 5.2386E-06 -2.7331E-07 9.2742E-09 -1.4792E-10 0.0000E+00 0.0000E+00

[0138] Table 9

[0139] Figures 13-15 、 Surface Number 、 Figure 16A The on-axis chromatic aberration curves of the optical imaging lens group of the present embodiment 3 in the wide angle state, the intermediate state and the telephoto state are shown in Figures 7, 8 and 9 respectively, which represent the deviation of the converging focal points of light rays of different wavelengths after passing through the lens. Figure 17A 、Figure 18A Figure 16B The astigmatism curves of the optical imaging lens set of embodiment 3 in the wide-angle state, the intermediate state and the long-focus state are shown respectively, which represent the meridional image surface curvature and the sagittal image surface curvature. Figure 17B Figure 18B Figure 16C The distortion curves of the optical imaging lens set of embodiment 3 in the wide-angle state, the intermediate state and the long-focus state are shown respectively, which represent the distortion size values corresponding to different image heights. Figure 17C Figure 18C Figure 10D The magnification chromatic aberration curves of the optical imaging lens set of embodiment 2 in the wide-angle state, the intermediate state and the long-focus state are shown respectively, which represent the deviations of light rays on the imaging surface at different image heights after passing through the lens. According to Figure 11D It can be known that the optical imaging lens set of embodiment 2 can achieve good imaging quality in each state.

[0140] In summary, the basic data of embodiments 1-3 of the present application in the wide-angle state, the intermediate state and the long-focus state are as follows in Table 10:

[0141]

[0142] Table 10

[0143] In embodiments 1-3 of the present application, each conditional formula satisfies the conditions in Table 11 below:

[0144] Figure 12D Figures 16A-18D Conditional Expression\Example Example 1 Example 2 1.24 1.25 1.25 Example 3 1.01 1.01 0.99 TTL / ft 0.57 0.48 0.61 R32 / R33 1.36 1.70 1.35 10x(R3L-R41) / (R3L+R41) 0.45 0.44 0.44 DTmax / Dtmin 0.75 0.79 0.94 ∑CT / TTL 0.86 0.77 0.86 TG3 / TG4 1.01 0.97 1.18 CT11 / ET11 -0.80 -0.91 -1.07 SAG42 / SAG43 -1.06 -1.06 -1.06 fG1 / fG3 1.08 1.19 1.22 fG4 / fw -0.46 -0.47 -0.48 R1L / R21 △TG12 / △f △TG34 / △f -0.17 -0.20 -0.22

[0145] Table 11

[0146] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.​​​​​

Claims

1. An optical imaging lens assembly, characterized in that: The optical imaging lens assembly comprises four lens groups having optical power and seven lenses. The four lens groups comprise, in order from the object side to the image side along the optical axis of the optical imaging lens assembly: a first lens group having optical power, the first lens group consisting of a first lens group and a second lens group in order from the object side to the image side along the optical axis, the first lens group having negative optical power, the object-side surface of the first lens group having a convex surface, and the image-side surface of the first lens group having a concave surface, the second lens group having positive or negative optical power, the object-side surface of the second lens group having a convex surface, and the image-side surface of the second lens group having a concave surface; a second lens group having optical power, the second lens group consisting of a first lens of the second lens group having positive optical power, the object-side surface of the first lens of the second lens group being a convex surface; a third lens group having optical power, the third lens group consisting of, in order from the object side to the image side along the optical axis, a first lens of the third lens group and a second lens of the third lens group, the first lens of the third lens group having negative optical power, the object-side surface of the first lens of the third lens group being concave, the image-side surface of the first lens of the third lens group being concave, the second lens of the third lens group having positive optical power, the object-side surface of the second lens of the third lens group being convex, and the image-side surface of the second lens of the third lens group being convex; a fourth lens group having negative refractive power, the fourth lens group consisting of, in order from the object side to the image side along the optical axis, a first lens of the fourth lens group and a second lens of the fourth lens group, the first lens of the fourth lens group having positive refractive power, the object-side surface of the first lens of the fourth lens group being concave, the image-side surface of the first lens of the fourth lens group being convex, the second lens of the fourth lens group having negative refractive power, the image-side surface of the second lens of the fourth lens group being concave and including at least one inflection point; The first lens group is a fixed group, and the second lens group, the third lens group, and the fourth lens group move on the optical axis to achieve continuous zooming of the optical imaging lens group from the wide-angle end to the telephoto end; the second lens group and the third lens group remain in a fixed position relative to each other and move on the optical axis simultaneously; An on-axis distance TG3 from the object-side surface of the first lens of the third lens group to the image-side surface of the last lens of the third lens group and an on-axis distance TG4 from the object-side surface of the first lens of the fourth lens group to the image-side surface of the last lens of the fourth lens group satisfy the following relationship: 0.75≤TG3 / TG4≤0.

94.

2. The optical imaging lens assembly according to claim 1, wherein: An axial distance TTL from the object side surface of the first lens of the first lens group to the imaging surface of the optical imaging lens group and an effective focal length ft of the optical imaging lens group at the telephoto end satisfy the following: 1.24≤TTL / ft≤1.

25.

3. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R32 of the image-side surface of the first lens of the third lens group and a curvature radius R33 of the object-side surface of the second lens of the third lens group satisfy the following relationship: 0.99≤R32 / R33≤1.

01.

4. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R3L of the image-side surface of the lens of the third lens group closest to the imaging surface of the optical imaging lens group and a curvature radius R41 of the object-side surface of the first lens of the fourth lens group satisfy the following relationship: 0.48≤10×(R3L-R41) / (R3L+R41)≤0.

61.

5. The optical imaging lens assembly according to claim 1, wherein: The maximum value DTmax of the effective radius of each lens in the optical imaging lens group and the minimum value DTmin of the effective radius of each lens in the optical imaging lens group satisfy the following relationship: 1.35≤DTmax / DTmin≤1.

7.

6. The optical imaging lens assembly according to claim 1, wherein: The sum ΣCT of the center thicknesses of the lenses in the optical imaging lens group and the on-axis distance TTL from the object side surface of the first lens in the first lens group to the imaging surface of the optical imaging lens group satisfy the following relationship: 0.44≤ΣCT / TTL≤0.

45.

7. The optical imaging lens assembly according to claim 1, wherein: The effective focal length fG1 of the first lens group and the effective focal length fG3 of the third lens group satisfy the following: -1.07≤fG1 / fG3≤-0.

8.

8. The optical imaging lens assembly according to claim 1, wherein: A center thickness CT11 of the first lens of the first lens group and an edge thickness ET11 of the first lens of the first lens group satisfy the following: 0.77≤CT11 / ET11≤0.

86.

9. The optical imaging lens assembly according to claim 1, wherein: An on-axis distance SAG42 between the intersection of the image side surface of the first lens of the fourth lens group and the optical axis and the vertex of the effective radius of the image side surface of the first lens of the fourth lens group and an on-axis distance SAG43 between the intersection of the object side surface of the second lens of the fourth lens group and the optical axis and the vertex of the effective radius of the object side surface of the second lens of the fourth lens group satisfy the following conditions: 0.97≤SAG42 / SAG43≤1.

18.

10. The optical imaging lens assembly according to claim 1, wherein: The effective focal length fG4 of the fourth lens group and the effective focal length fw of the optical imaging lens group at the wide-angle end satisfy the following: fG4 / fw=-1.

06.

11. The optical imaging lens assembly according to claim 1, wherein: A curvature radius R1L of the image-side surface of the last lens element in the first lens group and a curvature radius R21 of the object-side surface of the first lens element in the second lens group satisfy the following relationship: 1.08≤R1L / R21≤1.

22.

12. The optical imaging lens assembly according to claim 1, wherein: When the optical imaging lens group changes from the wide-angle end to the telephoto end, the displacement △TG12 of the on-axis distance between the first lens group and the second lens group and the change △f when the effective focal length of the optical imaging lens group changes from the wide-angle end to the telephoto end satisfy the following: -0.48≤△TG12 / △f≤-0.

46.

13. The optical imaging lens assembly according to claim 1, wherein: When the optical imaging lens group changes from the wide-angle end to the telephoto end, the displacement △TG34 of the on-axis distance between the third lens group and the fourth lens group and the change △f when the effective focal length of the optical imaging lens group changes from the wide-angle end to the telephoto end satisfy the following: -0.22≤△TG34 / △f≤-0.17.

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