Optical imaging lens group

Abstract

The invention discloses an optical imaging lens group, and the lens group comprises a first lens group which is composed of a first lens of the first lens group and a second lens of the first lens group; the second lens group is composed of the second lens group and the first lens; a third lens group composed of a third lens group first lens and a third lens group second lens; a fourth lens group 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 move to realize 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 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 the axial 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 relation: 0.75 < = TG3 / TG4 < = 0.94. The seven-piece optical imaging lens group of the aspherical lenses is adopted, the continuous zooming function is achieved through 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 with application date of August 31, 2020, application number 2020108937323, and invention name "An optical imaging lens group". Technical Field

[0002] The present invention relates to the technical field of optical elements, and in particular to an optical imaging lens group. Background Art

[0003] With the rapid development of smartphones, the market has also put forward more extensive requirements for the optical performance and functional diversity of imaging lenses. Currently, 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 an unzoomed photo, then "screenshots" the area selected by the user, and then processes it with software to obtain the target image and save it in the album. Therefore, the quality of the photo will be reduced, and even unclear or blurred.

[0004] Therefore, in order to allow users to have a better photo-taking experience, mobile phone lenses with continuous optical zoom function will become a new development trend. Summary of the invention

[0005] Based on this, it is necessary to provide an optical imaging lens group that realizes a continuous zoom function through the movement of the lens group, and has good imaging quality during the zooming process.

[0006] The present invention 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 focal power, wherein the image side surface of the lens closest to the imaging side is a concave surface; a second lens group with optical focal power; a third lens group with optical focal power; a fourth lens group with negative optical focal power, wherein the image side surface of the lens closest to the imaging side is a concave surface and includes at least one inflection point; wherein 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 realize continuous zooming of the optical imaging lens group from a wide-angle end to a telephoto end; the relative positions of the second lens group and the third lens group remain unchanged, and they move on the optical axis at the same time; and the on-axis distance TTL from the object side surface 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 satisfy the following: 0.8 <TTL / ft<1.5。

[0007] In one 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 satisfy: 0.8 <R32 / R33<1.2。

[0008] In one 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 satisfy: 0<10×(R3L-R41) / (R3L+R41)<1.

[0009] In one embodiment, 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: <DTmax / DTmin<2。

[0010] In one embodiment, the sum ΣCT of the center thicknesses of the lenses in the optical imaging lens group and the axial distance TTL from the object side of the first lens to the image plane of the optical imaging lens group satisfy: 0.3<ΣCT / TTL<0.6.

[0011] In one embodiment, the axial 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 three lens groups and the axial 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: 0.5 <TG3 / TG4≤1。

[0012] In one 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 satisfy: 0.5 <CT11 / ET11<1。

[0013] In one 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 to 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 to the vertex of the effective radius of the object side surface of the second lens of the fourth lens group satisfies: 0.8 <SAG42 / SAG43<1.3。

[0014] 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。

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

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

[0017] In one embodiment, 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: -0.6<△TG12 / △f<-0.3.

[0018] In one embodiment, 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: -0.4<△TG34 / △f<-0.1.

[0019] Another aspect of the present invention provides an optical imaging lens group, which includes, in order from the object side to the image side along the optical axis: a first lens group with optical focal length, wherein the image side surface of the lens closest to the imaging side is a concave surface; a second lens group with optical focal length; a third lens group with optical focal length; a fourth lens group with negative optical focal length, wherein the image side surface of the lens closest to the imaging side is a concave surface and includes at least one inflection point; wherein 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 relative positions of the second lens group and the third lens group remain 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 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 satisfy: 0.8 <TTL / ft<1.5。

[0022] In one 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 satisfy: 0.8 <R32 / R33<1.2。

[0023] In one 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 satisfy: 0<10×(R3L-R41) / (R3L+R41)<1.

[0024] In one embodiment, 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: <DTmax / DTmin<2。

[0025] In one embodiment, the sum ΣCT of the center thicknesses of the lenses in the optical imaging lens group and the axial distance TTL from the object side of the first lens to the image plane of the optical imaging lens group satisfy: 0.3<ΣCT / TTL<0.6.

[0026] In one embodiment, the axial 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 three lens groups and the axial 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: 0.5 <TG3 / TG4≤1。

[0027] In one 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 satisfy: 0.5 <CT11 / ET11<1。

[0028] In one 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 to 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 to the vertex of the effective radius of the object side surface of the second lens of the fourth lens group satisfies: 0.8 <SAG42 / SAG43<1.3。

[0029] In one embodiment, the effective focal length fG4 of the fourth lens group satisfies the effective focal length fw of the optical imaging lens group at the wide-angle end: -1.5 <fG4 / fw<-0.9。

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

[0031] In one embodiment, 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: -0.6<△TG12 / △f<-0.3.

[0032] In one embodiment, when the optical imaging lens group varies from the wide-angle end to the telephoto end, the displacement amount △TG34 of the on-axis distance between the third lens group and the fourth lens group satisfies -0.4 < △TG34 / △f < -0.1 with respect to the change amount △f of the effective focal length of the optical imaging lens group from the wide-angle end to the telephoto end.

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

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

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0036] Figure 1 FIG. 1 shows a schematic structural diagram of the optical imaging lens group according to Embodiment 1 of the present application in the wide-angle state;

[0037] Figure 2 FIG. 2 shows a schematic structural diagram of an intermediate state during the process of the optical imaging lens group according to Embodiment 1 of the present application switching from the wide-angle state to the telephoto state;

[0038] Figure 3 FIG. 3 shows a schematic structural diagram of the optical imaging lens group according to Embodiment 1 of the present application in the telephoto state;

[0039] FIG. 4A to FIG. 4D FIG. 4 respectively shows the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens group according to Embodiment 1 in the wide-angle state;

[0040] FIG. 5A to FIG. 5D FIG. 5 respectively shows the axial chromatic aberration curve, astigmatism curve, distortion curve, and longitudinal chromatic aberration curve of the optical imaging lens group according to Embodiment 1 in the intermediate state during the process of switching from the wide-angle state to the telephoto state;

[0041] FIG. 6A to FIG. 6D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 1 when in a telephoto state are respectively shown;

[0042] Figure 7 A schematic diagram showing the structure of an optical imaging lens assembly in a wide-angle state according to Embodiment 2 of the present application is shown;

[0043] Figure 8 A schematic structural diagram showing an intermediate state of the optical imaging lens assembly in the process of switching from a wide-angle state to a telephoto state according to Embodiment 2 of the present application;

[0044] Fig. 9 A schematic diagram showing the structure of an optical imaging lens assembly in a telephoto state according to Embodiment 2 of the present application is shown;

[0045] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 2 when in a wide-angle state are respectively shown;

[0046] FIG. 11A to FIG. 11D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 2 in the intermediate state during the process of switching from the wide-angle state to the telephoto state are respectively shown;

[0047] FIG. 12A to FIG. 12D The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 2 when in the telephoto state are respectively shown;

[0048] Fig.13 A schematic structural diagram of an optical imaging lens assembly in a wide-angle state according to Embodiment 3 of the present application is shown;

[0049] Fig.14 A schematic structural diagram showing an intermediate state of the optical imaging lens assembly in the process of switching from a wide-angle state to a telephoto state according to Embodiment 3 of the present application;

[0050] Fig.15 A schematic diagram showing the structure of an optical imaging lens assembly in a telephoto state according to Embodiment 3 of the present application is shown;

[0051] FIG. 16A to FIG. 16D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 3 when in a wide-angle state are respectively shown;

[0052] FIG. 17A to FIG. 17DThe axial chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical imaging lens group of Example 3 in the intermediate state when the optical imaging lens group is switched from the wide-angle state to the telephoto state are respectively shown;

[0053] 18A to 18D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens group of Example 3 when in a telephoto state are respectively shown.

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0059] 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.

[0060] 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 way unless explicitly defined in this article.

[0061] 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.

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

[0063] The optical imaging lens group according to the exemplary embodiment of the present application may include, for example, a lens group consisting of seven lenses having optical power, namely a first lens group, a second lens group, a third lens group, and a fourth lens group. The four lens groups are arranged in sequence from the object side to the image side along the optical axis.

[0064] In an exemplary embodiment, the first lens group may have positive optical power or negative optical power, wherein the image side surface of the lens closest to the imaging side is concave; the second lens group may have positive optical power or negative optical power; the third lens group may have positive optical power or negative optical power; the fourth lens group has negative optical power, wherein the image side surface of the lens closest to the imaging side is concave and includes at least one inflection point; wherein 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 realize continuous zooming of the optical imaging lens group from the wide-angle end to the telephoto end; the relative positions of the second lens group and the third lens group remain unchanged, and they move on the optical axis at the same time.

[0065] In an exemplary embodiment, the optical imaging lens group of the present application can satisfy the conditional formula 0.8 < TTL / ft < 1.5; where TTL is the axial distance from the object side surface of the first lens to the imaging surface of the optical imaging lens group; ft is the effective focal length of the optical imaging lens group at the telephoto end. By controlling the overall optical length of the imaging system within a reasonable range, a continuous zoom function from the wide-angle end to the telephoto end is achieved. Constraining the ratio of TTL and ft controls the volume of the overall module on the one hand and achieves an effect of 5-fold optical zoom (at equivalent focal length) at the telephoto end. More specifically, the following can be satisfied between TTL and ft: 1.24 ≤ TTL / ft ≤ 1.25.

[0066] In an exemplary embodiment, the optical imaging lens group of the present application can satisfy the conditional formula 0.8 < R32 / R33 < 1.2; where R32 is the radius of curvature of the image side surface of the first lens of the third lens group, and R33 is the radius of curvature of the object side surface of the second lens of the third lens group. By constraining the ratio of the radii of curvature of the two lenses to be near 1.0, it is closer to the doublet form, which is beneficial for reducing the chromatic aberration of magnification of the system. More specifically, the following can be satisfied between R32 and R33: 0.99 ≤ R32 / R33 ≤ 1.01.

[0067] In an exemplary embodiment, the optical imaging lens group of the present application can satisfy the conditional formula 0 < 10×(R3L - R41) / (R3L + R41) < 1; where R3L is the radius of curvature of the image side surface of the lens closest to the imaging surface in the third lens group, and R41 is the radius of curvature of the object side surface of the first lens of the fourth lens group. More specifically, the following can be satisfied between R3L and R41: 0.48 ≤ 10×(R3L - R41) / (R3L + R41) ≤ 0.61.

[0068] In an exemplary embodiment, the optical imaging lens group of the present application can satisfy the conditional formula 1 < DTmax / DTmin < 2; where DTmax is the maximum value of the effective radii of the lenses in the optical imaging lens group, and DTmin is the minimum value of the effective radii of the lenses in the optical imaging lens group. Considering that the zoom system actually adopts a lens edge-cutting form, by controlling the ratio of the maximum value to the minimum value of the effective radii of the lenses, the influence on factors such as the relative illuminance of the system after edge-cutting is minimized as much as possible. More specifically, the following can be satisfied between DTmax and DTmin: 1.35 ≤ DTmax / DTmin ≤ 1.70.

[0069] In an exemplary embodiment, the optical imaging lens group of the present application can satisfy the conditional formula 0.3 < ∑CT / TTL < 0.6; where ∑CT is the sum of the central thicknesses of the lenses in the optical imaging lens group, and TTL is the axial distance from the object side surface of the first lens to the imaging surface of the optical imaging lens group. More specifically, the following can be satisfied between ∑CT and TTL: 0.44 ≤ ∑CT / TTL < 0.45.

[0070] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula 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, between TG3 and TG4, it may satisfy: 0.75 ≤ TG3 / TG4 ≤ 0.94.

[0071] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula 0.5 < CT11 / ET11 < 1; where CT11 is the central 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, between CT11 and ET11, it may satisfy: 0.77 ≤ CT11 / ET11 ≤ 0.86.

[0072] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula 0.8 < SAG42 / SAG43 < 1.3; where SAG42 is the on-axis distance from the intersection point 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 point 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, between SAG42 and SAG43, it may satisfy: 0.97 ≤ SAG42 / SAG43 ≤ 1.18.

[0073] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula -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, between fG1 and fG3, it may satisfy: -1.07 ≤ fG1 / fG3 ≤ -0.80.

[0074] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula -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 group at the wide-angle end. More specifically, between fG4 and fw, it may satisfy: -1.06 ≤ fG4 / fw.

[0075] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula 1 < R1L / R21 < 1.5; where R1L is the curvature radius of the image side surface of the last lens in the first lens group, and R21 is the curvature radius of the object side surface of the first lens in the second lens group. More specifically, between R1L and R21, it may satisfy: 1.08 ≤ R1L / R21 ≤ 1.22.

[0076] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula -0.6<△TG12 / △f<-0.3; wherein △TG12 is the displacement 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 △f is the change in the effective focal length of the optical imaging lens group when it changes from the wide-angle end to the telephoto end. More specifically, △TG12 and △f may satisfy: -0.48≤△TG12 / △f≤-0.46.

[0077] In an exemplary embodiment, the optical imaging lens group of the present application may satisfy the conditional formula -0.4<△TG34 / △f<-0.1; wherein △TG34 is the displacement 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 △f is the change in the effective focal length of the optical imaging lens group when it changes from the wide-angle end to the telephoto end. More specifically, △TG34 and △f satisfy: -0.22≤△TG34 / △f≤-0.17.

[0078] In an exemplary embodiment, the optical imaging lens group may further include at least one aperture. The aperture may be disposed at an appropriate position as required, for example, between the second lens of the first lens group and the first lens of the second lens group. Optionally, the optical imaging lens group may further include a filter for correcting color deviation and / or a protective glass for protecting a 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 group according to the above embodiment of the present application may use multiple groups of lenses, such as the four groups described above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between lenses, etc., the total optical length of the imaging system is controlled within a reasonable range to achieve a continuous zoom function from the wide-angle end to the telephoto end, and the imaging quality is good during the zooming process.

[0081] 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 imaging 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 imaging lens group is not limited to including seven lenses. If necessary, the optical imaging lens group may also include other numbers of lenses.

[0082] The following further describes specific embodiments of the optical imaging lens assembly applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0083] Example 1

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

[0085] like Figure 1-Figure 3 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens group G1, an aperture 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 includes a first lens E11 and a second lens E12. The first lens E11 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave. The second lens E12 has negative power, its object side surface S13 is convex, and its image side surface S14 is concave. The second lens group G2 includes a first lens E21 with positive power, its object side surface S21 is convex, and its image side surface S22 is convex. The third lens group G3 includes a first lens E31 and a second lens E32 , the first lens E31 has negative power, its object side surface S31 is concave, and its image side surface S32 is concave, the second lens E32 has positive power, its object side surface S33 is convex, and its image side surface S34 is convex; the fourth lens group G4 includes the first lens E41 and the second lens E42, the first lens 41 has positive power, its object side surface S41 is concave, and its image side surface S42 is convex, the second lens E42 has negative power, its object side surface S43 is concave, and its image side surface S44 is concave. The light from the object passes through the surfaces S11 to SP2 in sequence and is finally imaged on the imaging surface IMA.

[0087] Table 1 shows the basic parameters of the optical imaging lens assembly of this embodiment 1, wherein the radius of curvature, thickness, and focal length are all in millimeters.

[0088] Face number Surface type Radius of curvature thickness focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S11 Aspheric 77.0211 2.1337 -26.95 1.55 56.1 90.6600 S12 Aspheric 12.2384 0.0800 8.7626 S13 Aspheric 7.3054 2.1500 -9002.52 1.68 19.2 -2.6459 S14 Aspheric 6.4286 T1 -6.8106 STO Spherical endless -0.6652 S21 Aspheric 5.9340 1.9577 10.01 1.55 56.1 -1.1674 S22 Aspheric -61.6991 3.3848 -15.6786 S31 Aspheric -21.0801 0.6855 -8.01 1.67 20.4 28.6426 S32 Aspheric 7.2515 0.1306 3.1527 S33 Aspheric 7.1569 2.1500 7.01 1.57 37.3 1.6417 S34 Aspheric -8.0979 T2 4.8587 S41 Aspheric -7.2261 2.1500 15.95 1.68 19.2 -11.2759 S42 Aspheric -4.8548 0.0600 -1.2714 S43 Aspheric -23.0075 1.7653 -8.13 1.54 55.7 38.8935 S44 Aspheric 5.5322 T3 -11.1038 SP1 Spherical endless 0.2100 1.52 64.2 SP2 Spherical endless 1.3558 IMA Spherical endless

[0089] Table 1

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

[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 axial distance TTL from the object side surface S11 of the first lens E11 to the imaging surface IMA is 29.01 mm, and the half diagonal length ImgH 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 equation TTL / ft=1.24, satisfying 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 the 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 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 are related by the equation DTmax / DTmin=1.36, satisfying 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 axial 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 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 the axial 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 are related by the equation TG3 / TG4=0.75, satisfying 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 have a relationship of 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 to 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 to the vertex of the effective radius of the object side surface of the second lens of the fourth lens group, the relationship SAG42 / SAG43=1.01, satisfies 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 are related by the equation fG1 / fG3=-0.80, which satisfies -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 are related by the equation fG4 / fw=-1.06, which satisfies -1.5 <fG4 / fw<-0.9。

[0104] In the first embodiment, the curvature radius R1L of the image side surface of the last lens in the first lens group and the curvature radius R21 of the object side surface of the first lens in the second lens group are related by R1L / R21=1.08, satisfying 1 <R1L / R21<1.5。

[0105] In the first embodiment, 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, the relationship △TG12 / △f=-0.46, satisfying -0.6<△TG12 / △f<-0.3.

[0106] In the first embodiment, 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, the relationship △TG34 / △f=-0.17, satisfying -0.4<△TG34 / △f<-0.1.

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

[0108] Face number 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] Figure 4A , Figure 5A , Fig. 6A The axial chromatic aberration curves of the optical imaging lens assembly of Example 1 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which indicate that light rays of different wavelengths deviate from the focal point behind the lens. Figure 4B , Figure 5B , Figure 6B The astigmatism curves of the optical imaging lens group of Example 1 when they are in a wide-angle state, a middle state, and a telephoto state are respectively shown, which represent the meridional image curvature and the sagittal image curvature. Figure 4C , Figure 5C , Figure 6C The distortion curves of the optical imaging lens group of Example 1 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 4D , Figure 5D , Fig.6D The magnification chromatic aberration curves of the optical imaging lens group of Example 1 when in a wide-angle state, a middle state, and a telephoto state are shown respectively, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. 4A to 6D It can be seen that the optical imaging lens assembly provided in Example 1 can achieve good imaging quality in all states.

[0111] Example 2

[0112] The following reference Figures 7 to 12D A schematic diagram of the structure of an optical imaging lens assembly according to Embodiment 2 of the present application is described. Figure 7 A schematic diagram showing the structure of the optical imaging lens assembly in a wide-angle state according to Embodiment 2 of the present application is shown; Figure 8 A schematic structural diagram showing an intermediate state of the optical imaging lens assembly in the process of switching from a wide-angle state to a telephoto state according to Embodiment 2 of the present application; Fig. 9 A schematic diagram of the structure of the optical imaging lens group according to Example 2 of the present application when in a telephoto state is shown.

[0113] like Figure 7-Figure 9 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens group G1, an aperture STO, a second lens group G2, a third lens group G3, a fourth lens group G4, a filter P and an imaging surface IMA.

[0114] The first lens group G1 includes a first lens E11 and a second lens E12. The first lens E11 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave. The second lens E12 has positive power, its object side surface S13 is convex, and its image side surface S14 is concave. The second lens group G2 includes a first lens E21 with positive power, its object side surface S21 is convex, and its image side surface S22 is convex. The third lens group G3 includes a first lens E31 and a second lens E32. , the first lens E31 has negative power, its object side surface S31 is convex, and its image side surface S32 is concave, the second lens E32 has positive power, its object side surface S33 is convex, and its image side surface S34 is convex; the fourth lens group G4 includes the first lens E41 and the second lens E42, the first lens E41 has positive power, its object side surface S41 is concave, and its image side surface S42 is convex, the second lens E42 has negative power, its object side surface S43 is concave, and its image side surface S44 is concave. The light from the object passes through the surfaces S11 to SP2 in sequence and is finally imaged on the imaging surface IMA.

[0115] Table 4 shows the basic parameters of the optical imaging lens assembly of the present embodiment 2, wherein the radius of curvature, thickness and focal length are all in millimeters.

[0116] Face number Surface type Radius of curvature thickness focal length Refractive Index Dispersion coefficient Cone coefficient OBJ Spherical endless endless S11 Aspheric 78.9982 2.1500 -26.59 1.55 56.1 98.4032 S12 Aspheric 12.1522 0.1037 8.6978 S13 Aspheric 7.2509 2.1478 422.88 1.68 19.2 -2.7453 S14 Aspheric 6.5481 T1 -6.8098 STO Spherical endless -0.6793 S21 Aspheric 5.5114 1.6874 10.17 1.55 56.1 -1.0650 S22 Aspheric 600.0000 3.1672 99.0000 S31 Aspheric -20.6327 0.7246 -7.99 1.67 20.4 30.7808 S32 Aspheric 7.2932 0.2785 3.1627 S33 Aspheric 7.1854 2.1500 7.00 1.57 37.3 1.6338 S34 Aspheric -8.0357 T2 4.8228 S41 Aspheric -7.2952 2.1500 18.24 1.68 19.2 -11.5904 S42 Aspheric -5.1367 0.0600 -1.3754 S43 Aspheric -31.5606 1.8030 -8.66 1.54 55.7 37.5961 S44 Aspheric 5.5651 T3 -10.0349 SP1 Spherical endless 0.2100 1.52 64.2 SP2 Spherical endless 1.4029 IMA Spherical endless

[0117] Table 4

[0118] The following Table 5 gives the corresponding values ​​of T1, T2, and T3 of the optical imaging lens assembly of Embodiment 2 in the wide-angle state (W), the middle state (M), and the telephoto state (T) during the zooming process, in millimeters.

[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] Table 6 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspheric surface S11-S44 that can be used for each aspheric lens in the second embodiment of the present application.

[0122]

[0123]

[0124] Table 6

[0125] Fig. 10A , Fig.11A , Fig. 12AThe axial chromatic aberration curves of the optical imaging lens assembly of Example 2 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which indicate that light rays of different wavelengths deviate from the focal point behind the lens. Fig. 10B , Fig. 11B , Fig. 12B The astigmatism curves of the optical imaging lens group of Example 2 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which represent the meridional image curvature and the sagittal image curvature. Fig. 10C , Fig. 11C , Fig. 12C The distortion curves of the optical imaging lens group of Example 2 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig. 10D , Fig.11D , Fig.12D The magnification chromatic aberration curves of the optical imaging lens group of Example 2 are respectively shown when they are in a wide-angle state, a middle state, and a telephoto state, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 12D It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality in all states.

[0126] Example 3

[0127] The following reference Figures 13 to 18D A schematic diagram of the structure of an optical imaging lens assembly according to Embodiment 3 of the present application is described. Fig.13 A schematic diagram showing the structure of the optical imaging lens assembly in a wide-angle state according to Embodiment 3 of the present application is shown; Fig.14 A schematic structural diagram showing an intermediate state of the optical imaging lens assembly in the process of switching from a wide-angle state to a telephoto state according to Embodiment 3 of the present application; Fig.15 A schematic diagram of the structure of the optical imaging lens group according to Example 3 of the present application when in a telephoto state is shown.

[0128] like Figure 13-Figure 15 As shown, the optical imaging lens group includes, from the object side to the image side, a first lens group G1, an aperture STO, a second lens group G2, a third lens group G3, a fourth lens group G4, a filter P and an imaging surface IMA.

[0129] The first lens group G1 includes a first lens E11 and a second lens E12. The first lens E11 has negative power, its object side surface S11 is convex, and its image side surface S12 is concave. The second lens E12 has positive power, its object side surface S13 is convex, and its image side surface S14 is concave. The second lens group G2 includes a first lens E21 with positive power, its object side surface S21 is convex, and its image side surface S22 is concave. The third lens group G3 includes a first lens E31 and a second lens E32 , the first lens E31 has negative power, its object side surface S31 is concave, and its image side surface S32 is concave, the second lens E32 has positive power, its object side surface S33 is convex, and its image side surface S34 is convex; the fourth lens group G4 includes the first lens E41 and the second lens E42, the first lens E41 has positive power, its object side surface S41 is concave, and its image side surface S42 is convex, the second lens E42 has negative power, its object side surface S43 is convex, and its image side surface S44 is concave. The light from the object passes through the surfaces S11 to SP2 in sequence and is finally imaged on the imaging surface IMA.

[0130] Table 7 shows the basic parameters of the optical imaging lens assembly of this embodiment 3, wherein the radius of curvature, thickness, and focal length are all in millimeters.

[0131]

[0132]

[0133] Table 8 below gives the corresponding values ​​of T1, T2, and T3 of the optical imaging lens group of Embodiment 3 in the wide-angle state (W), the middle state (M), and the telephoto state (T) during the zooming process, in millimeters.

[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] Table 9 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspheric surface S11-S44 that can be used for each aspheric lens in the third embodiment of the present application.

[0137] Face number 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] Fig.16A , Fig.17A , Fig.18A The axial chromatic aberration curves of the optical imaging lens group of Example 3 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which indicate that light rays of different wavelengths deviate from the focal point behind the lens. Fig. 16B , Fig. 17B , Fig.18B The astigmatism curves of the optical imaging lens group of Example 3 when they are in a wide-angle state, a middle state, and a telephoto state are respectively shown, which represent the meridional image curvature and the sagittal image curvature. Fig. 16C , Fig. 17C , Fig.18C The distortion curves of the optical imaging lens group of Example 3 when in a wide-angle state, a middle state and a telephoto state are respectively shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig. 10D , Fig.11D , Fig.12D The magnification chromatic aberration curves of the optical imaging lens group of Example 2 are respectively shown when they are in a wide-angle state, a middle state, and a telephoto state, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 16A to FIG. 18D It can be seen that the optical imaging lens assembly provided in Example 2 can achieve good imaging quality in all states.

[0140] In summary, the basic data of Examples 1-3 of the present application in the wide-angle state, the intermediate state, and the telephoto state are as shown in Table 10 below:

[0141]

[0142] Table 10

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

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

[0145] Table 11

[0146] 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 imaging lens assembly, characterized in that: The optical imaging lens group has four lens groups with optical power and seven lenses. The four lens groups include: a first lens group having optical power, wherein the first lens group is composed 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 has negative optical power, the object side surface of the first lens group is convex, and the image side surface of the first lens group is concave, the second lens group has positive optical power or negative optical power, the object side surface of the second lens group is convex, and the image side surface of the second lens group is concave; a second lens group having optical power, the second lens group consisting of a second lens group first lens having positive optical power, the object side surface of the second lens group first lens being a convex surface; a third lens group having optical power, wherein the third lens group is composed of a first lens of the third lens group and a second lens of the third lens group in order from the object side to the image side along the optical axis, the first lens of the third lens group has negative optical power, the object side surface of the first lens of the third lens group is a concave surface, the image side surface of the first lens of the third lens group is a concave surface, the second lens of the third lens group has positive optical power, the object side surface of the second lens of the third lens group is a convex surface, and the image side surface of the second lens of the third lens group is a convex surface; a fourth lens group having negative power, wherein the fourth lens group is composed of a first lens of a fourth lens group and a second lens of a fourth lens group in order from the object side to the image side along the optical axis, the first lens of the fourth lens group having positive power, the object side surface of the first lens of the fourth lens group being a concave surface, the image side surface of the first lens of the fourth lens group being a convex surface, the second lens of the fourth lens group having negative power, and the image side surface of the second lens of the fourth lens group being a concave surface and including at least one inflection point; Wherein, 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 realize continuous zooming of the optical imaging lens group from the wide-angle end to the telephoto end; the relative positions of the second lens group and the third lens group remain unchanged, and they move on the optical axis at the same time; An axial 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 axial 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: 0.75≤TG3 / TG4≤0.

94.

2. The optical imaging lens assembly according to claim 1, characterized in that: 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: 1.24≤TTL / ft≤1.

25.

3. The optical imaging lens assembly according to claim 1, characterized in that: 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: 0.99≤R32 / R33≤1.

01.

4. The optical imaging lens assembly according to claim 1, characterized in that: The 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 the curvature radius R41 of the object side surface of the first lens of the fourth lens group satisfy: 0.48≤10×(R3L-R41) / (R3L+R41)≤0.

61.

5. The optical imaging lens assembly according to claim 1, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 the following: 0.77≤CT11 / ET11≤0.

86.

9. The optical imaging lens assembly according to claim 1, characterized in that: 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 to 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 to 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, characterized in that: 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: fG4 / fw=-1.06.

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