Optical lens assembly for mobile focusing

Abstract

The application provides a mobile focusing optical lens group. The mobile focusing optical lens group comprises, along an optical axis from an object side to an imaging side, a first lens group, a second lens group, the second lens group comprising at least a seventh lens, when a distance between the mobile focusing optical lens group and a subject is changed from far to near, a distance between the first lens group and the second lens group on the optical axis is adjusted to perform focusing, a distance TTLi on the optical axis from an object side surface of the first lens to an imaging surface when shooting at a far distance, a half of a diagonal line length of an effective pixel area on the imaging surface of the mobile focusing optical lens group when shooting at the far distance ImgHi, and a half of a maximum field angle of the mobile focusing optical lens group when shooting at the far distance Semi-FOVi satisfy: 1<TTLi / ImgHi*tan(Semi-FOVi)<2. The application solves the problem that a mobile focusing optical lens group in the prior art cannot simultaneously consider miniaturization, a large imaging surface, a large depth of field and a large aperture.

Description

[0001] This application is a divisional application of the patent application with the application number 202210039321.7, the title of which is "Mobile focusing optical lens group", which was filed with the State Intellectual Property Office of China on January 13, 2022. TECHNICAL FIELD

[0002] The present application relates to the technical field of optical imaging equipment, in particular to a mobile focusing optical lens group. BACKGROUND

[0003] At present, the demand for the smart phone market increases year by year, and the optical lens group on the smart phone gradually develops towards diversification with the continuous updating of user demand. Generally, a single mobile phone will be equipped with 2-8 cameras, so the thinness and weight of the camera become the focus of attention of mobile phone manufacturers and consumers. Among them, the optical lens group with a large image surface can achieve higher resolution in actual shooting, and is favored by more and more consumers and mobile phone manufacturers, but the large image surface leads to a longer optical lens group as a whole, so that the optical lens group body is heavier and larger in size; the prior art provides a mobile focusing optical lens group, which has poor imaging clarity when shooting close-up and shooting long distance, and it is difficult to meet the user's demand, therefore, there is an urgent need for a mobile focusing optical lens group suitable for light and thin portable electronic products, which has large depth of field, large aperture, good imaging quality and low power consumption.

[0004] Generally speaking, due to the limitation of space, it is difficult for a small camera to meet the needs of long shooting and close-up shooting at the same time, and with the development of the camera, how to focus more quickly is also a big challenge for optical engineers.

[0005] That is, the mobile focusing optical lens group in the prior art has the problem that miniaturization, large image surface, large depth of field and large aperture are difficult to be considered at the same time. SUMMARY

[0006] The main purpose of the present application is to provide a mobile focusing optical lens group to solve the problem that the mobile focusing optical lens group in the prior art has the problem that miniaturization, large image surface, large depth of field and large aperture are difficult to be considered at the same time.

[0007] In order to achieve the above object, according to one aspect of the present application, a mobile focusing optical lens group is provided, which comprises, in order from an object side to an image side along an optical axis, a first lens group, and a second lens group, the second lens group comprising at least a seventh lens, the object side surface of the seventh lens being concave, and the image side surface of the seventh lens being convex, wherein when the distance between the object and the mobile focusing optical lens group is changed from infinity to a close distance, the distance between the first lens group and the second lens group along the optical axis is adjusted to perform focusing, and the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group satisfy the following condition: 0.2 < EPD / Fg1 < 1.

[0008] Further, the mobile focusing optical lens group further comprises a stop, which is located on the object side of the second lens.

[0009] Further, the distance Um between the object and the object side surface of the first lens of the mobile focusing optical lens group when the mobile focusing optical lens group is used for close-up shooting satisfies the following condition: 90mm ≤ Um ≤ 200mm.

[0010] Further, the distance TTLi between the object side surface of the first lens and the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting, the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting ImgHi, and the half of the maximum field angle of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting Semi-FOVi satisfy the following condition: 1 < TTLi / ImgHi*tan(Semi-FOVi) < 2.

[0011] Further, the distance TTLi between the object side surface of the first lens and the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting, the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting ImgHi, the distance TTLm between the object side surface of the first lens and the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for close-up shooting, and the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group when the mobile focusing optical lens group is used for close-up shooting ImgHm satisfy the following condition: |TTLi / ImgHi-TTLm / ImgHm| < 0.15.

[0012] Further, the focal length Fg1 of the first lens group, the focal length fi of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting, and the focal length fm of the mobile focusing optical lens group when the mobile focusing optical lens group is used for close-up shooting satisfy the following condition: |Fg1 / fi-Fg1 / fm| < 0.1.

[0013] Further, the aperture value fnoi of the mobile focusing optical lens group when the mobile focusing optical lens group is used for far shooting and the aperture value fnom of the mobile focusing optical lens group when the mobile focusing optical lens group is used for close-up shooting satisfy the following condition: 0.9 < fnoi / fnom < 1.2.

[0014] Further, a distance TDm on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in close-up, a distance TTLm on the optical axis from the object side of the first lens to the imaging plane of the mobile focusing optical lens group in close-up, a distance TDi on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in telephoto, and a distance TTLi on the optical axis from the object side of the first lens to the imaging plane of the mobile focusing optical lens group in telephoto satisfy: 0.8 < (TDi / TTLi) / (TDm / TTLm) < 1.

[0015] Further, a sum of edge thicknesses ∑ET of the lenses in the mobile focusing optical lens group and a sum of thicknesses ∑CT of the first lens to the fifth lens on the optical axis of the mobile focusing optical lens group satisfy: 0.5 < ∑ET / ∑CT < 1.

[0016] Further, an edge thickness ET1 of the first lens and an edge thickness ET7 of the seventh lens satisfy: 0.2 < ET1 / ET7 < 0.8.

[0017] Further, a distance BFLm on the optical axis from the imaging side of the seventh lens to the imaging plane of the mobile focusing optical lens group in close-up and a sum ∑ATm on the optical axis of air gaps between the lenses of the first lens to the seventh lens of the mobile focusing optical lens group in close-up satisfy: BFLm / ∑ATm < 0.5.

[0018] Further, a sum ∑ATm on the optical axis of air gaps between the lenses of the first lens to the seventh lens of the mobile focusing optical lens group in close-up and a distance ∑T67m on the optical axis of air gaps between the sixth lens and the seventh lens of the mobile focusing optical lens group in close-up satisfy: 0.3 < ∑T67m / ∑ATm < 0.8.

[0019] Further, a difference amount ΔT on the optical axis of the interval between the first lens group and the second lens group of the mobile focusing optical lens group in close-up and in telephoto and a sum ∑CT of thicknesses of the first lens to the fifth lens on the optical axis of the mobile focusing optical lens group satisfy: ΔT / ∑CT < 0.5.

[0020] Further, a refractive index N2 of the second lens, a refractive index N3 of the third lens, and a refractive index N4 of the fourth lens satisfy: 4.5 < N2+N3+N4 < 5.

[0021] Further, the number V of lenses with Abbe number greater than 50 50 satisfies: V 50 ≥ 2.

[0022] According to another aspect of the present application, there is provided a moving focus optical lens group, comprising in order from an object side to an image side along an optical axis: a first lens group; a second lens group, the second lens group comprising at least a seventh lens, the object side surface of the seventh lens being concave and the image side surface of the seventh lens being convex; wherein when a subject distance of the moving focus optical lens group is changed from infinity to a close-up shot, a distance between the first lens group and the second lens group on the optical axis is adjusted to perform focusing; a distance TTLi on the optical axis from the object side surface of the first lens to an image plane of the moving focus optical lens group in a telephoto shot, a half of a diagonal length of an effective pixel area on the image plane of the moving focus optical lens group in the telephoto shot ImgHi, and a half of a maximum field angle of the moving focus optical lens group in the telephoto shot Semi-FOVi satisfy: 1 < TTLi / ImgHi*tan(Semi-FOVi) < 2.

[0023] Further, the moving focus optical lens group further comprises a stop, the stop being located on the object side of the second lens; a diameter of an entrance pupil EPD of the moving focus optical lens group and a focal length Fg1 of the first lens group satisfy: 0.2 < EPD / Fg1 < 1.

[0024] Further, a distance Um between the subject and the object side surface of the first lens of the moving focus optical lens group in a close-up shot satisfies: 90mm ≤ Um ≤ 200mm.

[0025] Further, the distance TTLi on the optical axis from the object side surface of the first lens to the image plane of the moving focus optical lens group in the telephoto shot, the half of the diagonal length of the effective pixel area on the image plane of the moving focus optical lens group in the telephoto shot ImgHi, a distance TTLm on the optical axis from the object side surface of the first lens to the image plane of the moving focus optical lens group in the close-up shot, and a half of a diagonal length of an effective pixel area on the image plane of the moving focus optical lens group in the close-up shot ImgHm satisfy: |TTLi / ImgHi-TTLm / ImgHm| < 0.15.

[0026] Further, a focal length Fg1 of the first lens group, a focal length fi of the moving focus optical lens group in the telephoto shot, and a focal length fm of the moving focus optical lens group in the close-up shot satisfy: |Fg1 / fi-Fg1 / fm| < 0.1.

[0027] Further, an aperture value fnoi of the moving focus optical lens group in the telephoto shot and an aperture value fnom of the moving focus optical lens group in the close-up shot satisfy: 0.9 < fnoi / fnom < 1.2.

[0028] Further, a distance TDm on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in close-up, a distance TTLm on the optical axis from the object side of the first lens to the imaging plane of the mobile focusing optical lens group in close-up, a distance TDi on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in telephoto, and a distance TTLi on the optical axis from the object side of the first lens to the imaging plane of the mobile focusing optical lens group in telephoto satisfy: 0.8 < (TDi / TTLi) / (TDm / TTLm) < 1.

[0029] Further, a sum of edge thicknesses ∑ET of the lenses in the mobile focusing optical lens group and a sum of thicknesses ∑CT of the first lens to the fifth lens on the optical axis of the mobile focusing optical lens group satisfy: 0.5 < ∑ET / ∑CT < 1.

[0030] Further, an edge thickness ET1 of the first lens and an edge thickness ET7 of the seventh lens satisfy: 0.2 < ET1 / ET7 < 0.8.

[0031] Further, a distance BFLm on the optical axis from the imaging side of the seventh lens to the imaging plane of the mobile focusing optical lens group in close-up and a sum ∑ATm on the optical axis of air gaps between the lenses of the first lens to the seventh lens of the mobile focusing optical lens group in close-up satisfy: BFLm / ∑ATm < 0.5.

[0032] Further, the sum ∑ATm on the optical axis of air gaps between the lenses of the first lens to the seventh lens of the mobile focusing optical lens group in close-up and a distance ∑T67m on the optical axis of air gaps of the sixth lens to the seventh lens of the mobile focusing optical lens group in close-up satisfy: 0.3 < ∑T67m / ∑ATm < 0.8.

[0033] Further, a difference amount ΔT on the optical axis of the interval of the first lens group and the second lens group of the mobile focusing optical lens group in close-up and in telephoto and a sum of thicknesses ∑CT of the first lens to the fifth lens on the optical axis of the mobile focusing optical lens group satisfy: ΔT / ∑CT < 0.5.

[0034] Further, a refractive index N2 of the second lens, a refractive index N3 of the third lens, and a refractive index N4 of the fourth lens satisfy: 4.5 < N2+N3+N4 < 5.

[0035] Further, the number of lenses V 50 satisfy: V 50 ≥ 2.

[0036] Applying the technical solution of this invention, the moving focusing optical lens group sequentially includes a first lens group and a second lens group along the optical axis from the object side to the imaging side. The second lens group includes at least a seventh lens, the object side of which is concave, and the imaging side is convex. When the subject moves closer to the moving focusing optical lens group from far to near, the distance between the first and second lens groups along the optical axis is adjusted to perform focusing. The entrance pupil diameter EPD of the moving focusing optical lens group and the focal length Fg1 of the first lens group satisfy the following relationship: 0.2. <EPD / Fg1<1。

[0037] By rationally allocating the seventh lens element's surface shape, the distortion and astigmatism of the entire system can be better balanced. Furthermore, it facilitates obtaining a larger image plane, resulting in higher resolution and better image quality. By constraining the ratio between the entrance pupil diameter EPD of the moving focus optical lens group and the focal length Fg1 of the first lens group within a reasonable range, sufficient light throughput is ensured in low-light conditions at close range to guarantee high illumination of the image plane and maintain excellent image quality. In addition, the moving focus optical lens group of this application uses seven lenses, which facilitates miniaturization. During actual shooting, it not only maintains sharp imaging of distant subjects but also ensures sufficient imaging light enters the optical system during close-up shots, reducing image noise and improving the imaging effect of close-up shots. This contributes to achieving a large depth of field and a large aperture. Attached Figure Description

[0038] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0039] Figure 1 This diagram shows a schematic representation of the moving focus optical lens group of Example 1 of the present invention during long-distance shooting.

[0040] Figure 2 This shows a schematic diagram of the moving focus optical lens group of Example 1 of the present invention during close-up shooting;

[0041] Figures 3 to 5 They are shown respectively Figure 1 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the moving focusing optical lens group in the image;

[0042] Figures 6 to 8 They are shown respectively Figure 2 The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the moving focusing optical lens group in the image;

[0043] Figure 9A schematic view of the mobile focusing optical lens assembly of Example Two of the present application in a far shot is shown;

[0044] Figure 10 A schematic view of the mobile focusing optical lens assembly of Example Two of the present application in a close shot is shown;

[0045] Figures 11 to 13 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 9

[0046] Figures 14 to 16 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 10

[0047] Figure 17 A schematic view of the mobile focusing optical lens assembly of Example Three of the present application in a far shot is shown;

[0048] Figure 18 A schematic view of the mobile focusing optical lens assembly of Example Three of the present application in a close shot is shown;

[0049] Figures 19 to 21 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 17

[0050] Figures 22 to 24 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 18

[0051] Figure 25 A schematic view of the mobile focusing optical lens assembly of Example Four of the present application in a far shot is shown;

[0052] Figure 26 A schematic view of the mobile focusing optical lens assembly of Example Four of the present application in a close shot is shown;

[0053] Figures 27 to 29 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 25

[0054] Figures 30 to 32 The on-axis chromatic aberration curve, the astigmatism curve and the distortion curve of the mobile focusing optical lens assembly in Figure 26

[0055] In the above drawings, the following reference signs are used:

[0056] ​​​​​​STO, stop; G1, first lens group; E1, first lens; S1, object side surface of the first lens; S2, imaging side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, imaging side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, imaging side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, imaging side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, imaging side surface of the fifth lens; E6, sixth lens; S11, object side surface of the sixth lens; S12, imaging side surface of the sixth lens; G2, second lens group; E7, seventh lens; S13, object side surface of the seventh lens; S14, imaging side surface of the seventh lens; E8, filter; S15, object side surface of the filter; S16, imaging side surface of the filter; S17, imaging surface. DETAILED DESCRIPTION

[0057] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, unless otherwise specified. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0058] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0059] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0060] It should be noted that, in the present 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, 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.

[0061] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of illustration. 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 merely examples and are not drawn strictly to scale.

[0062] 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 near the object side is the object side surface of the lens, and the surface of each lens near the imaging side is the imaging side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, and the convexity and concavity are judged by the R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens data in the optical software). For the object side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the imaging side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0063] In order to solve the problem that the mobile focusing optical lens group in the prior art cannot simultaneously achieve miniaturization, large image surface, large depth of field and large aperture, the present application provides a mobile focusing optical lens group.

[0064] Embodiment one

[0065] As shown in Figures 1 to 32 , the mobile focusing optical lens group sequentially includes a first lens group and a second lens group along the optical axis from the object side to the imaging side, the second lens group at least includes a seventh lens, the object side surface of the seventh lens is concave, and the imaging side surface is convex; wherein when the distance between the object and the mobile focusing optical lens group is from far to near, the interval distance of the first lens group and the second lens group on the optical axis is adjusted to perform focusing; the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group satisfy: 0.2<EPD / Fg1<1.

[0066] Preferably, 0.2<EPD / Fg1<0.5.

[0067] By reasonably allocating the surface shape of the seventh lens, on the one hand, the distortion and astigmatism of the entire system can be better balanced, and on the other hand, a larger image surface can be obtained, and higher resolution and better imaging quality can be achieved. By restricting the ratio between the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group within a reasonable range, it is ensured that the mobile focusing optical lens group still has sufficient light flux to ensure that the image surface has a higher illumination in the case of weak light in the close-up scene, and the excellent imaging quality is maintained. In addition, the mobile focusing optical lens group of the present application adopts seven lenses, which is conducive to realizing miniaturization, and at the same time, in the actual shooting process, not only can the imaging ability of the far distance object be kept clear, but also enough imaging light can enter the optical system in the close-up shooting, the noise of the imaging picture is reduced, the imaging effect of the close-up shooting is improved, and the characteristics of large depth of field and large aperture are realized.

[0068] In the embodiment, the mobile focusing optical lens group further comprises a diaphragm, which is located on the object side of the second lens. The diaphragm is located between the object side and the second lens, which can realize aperture change, better meet the shooting requirements, and obtain better resolving power at the long focal end, reduce the design difficulty, and at the same time, can reduce the aperture of the lens, which is conducive to miniaturization.

[0069] In the embodiment, the distance Um between the object and the object side of the first lens of the mobile focusing optical lens group when shooting close-up satisfies: 90mm≤Um≤200mm. With the development of the times, users have higher and higher requirements for macro performance, and the mobile focusing optical lens group of the present application can realize clear imaging at 90mm-200mm ultra-short distance, meet customer demand, and adapt to a wider range of life scenes. Preferably, 100mm≤Um≤180mm.

[0070] In the embodiment, the distance TTLi on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group when shooting telephoto, the half ImgHi of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group when shooting telephoto, and the half Semi-FOVi of the maximum field of view angle of the mobile focusing optical lens group when shooting telephoto satisfy: 1<TTLi / ImgHi*tan(Semi-FOVi)<2. Satisfying this condition formula makes the mobile focusing optical lens group thinner as a whole, the image surface larger, and the field of view angle larger, which ensures that the mobile focusing optical lens group can present more detail information of the object, and realizes the characteristics of high resolution, large depth of field, and large aperture while meeting miniaturization. Preferably, 1.2<TTLi / ImgHi*tan(Semi-FOVi)<1.5.

[0071] In the embodiment, the distance TTLi on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group when shooting telephoto, the half ImgHi of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group when shooting telephoto, the distance TTLm on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group when shooting close-up, and the half ImgHm of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group when shooting close-up satisfy: |TTLi / ImgHi-TTLm / ImgHm|<0.15. Satisfying this condition formula is conducive to controlling the total length of the system when shooting telephoto and close-up to be similar, the image surface size to be similar, ensuring that the mobile focusing optical lens group does not have unfavorable installation conditions when module assembly is performed, ensuring that the movement of the second lens group when shooting telephoto and close-up does not interfere with the module end, while ensuring that the picture changes little when switching between telephoto and close-up, presenting more detail information of the object, and improving user experience. Preferably, |TTLi / ImgHi-TTLm / ImgHm|≤0.1.

[0072] In the embodiment, the focal length Fg1 of the first lens group, the focal length fi of the mobile focusing optical lens group in the far shot, and the focal length fm of the mobile focusing optical lens group in the close shot satisfy the condition: |Fg1 / fi-Fg1 / fm|<0.1. Satisfying the condition, on the one hand, the distortion and the astigmatism of the whole system can be better balanced, and on the other hand, the focal length change range is small when the far and close scenes are switched, and the motor stroke is controlled within a reasonable range.

[0073] In the embodiment, the aperture value fnoi of the mobile focusing optical lens group in the far shot and the aperture value fnom of the mobile focusing optical lens group in the close shot satisfy the condition: 0.9<fnoi / fnom<1.2. Satisfying the condition, the mobile focusing optical lens group can obtain sufficient light flux in the macro mode to ensure that the image surface has high illumination, while the whole system change range is small, and the motor stroke is controlled within a reasonable range.

[0074] In the embodiment, the distance TDm on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in the close shot, the distance TTLm on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group in the close shot, the distance TDi on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in the far shot, and the distance TTLi on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group in the far shot satisfy the condition: 0.8<(TDi / TTLi) / (TDm / TTLm)<1. Satisfying the condition, a more reasonable back focal length is obtained in the far shot and the close shot, preventing the module end from being poor due to the back focal length being too large or too small, while reducing the working stroke of the motor during focusing, and ensuring the miniaturization of the mobile focusing optical lens group.

[0075] In the embodiment, the total edge thickness ∑ET of the lenses in the mobile focusing optical lens group and the total thickness ∑CT of the first lens to the fifth lens on the optical axis of the mobile focusing optical lens group satisfy the condition: 0.5<∑ET / ∑CT<1. Satisfying the condition, on the one hand, the distortion and the field curvature of the whole system can be better balanced, and on the other hand, the lenses are not easy to deform during assembly, which is very helpful for the stability of the field curvature, in addition, the molding and debugging process space is larger, avoiding the risk of stray light due to appearance problems of the lenses. Preferably, 0.8<∑ET / ∑CT<1.

[0076] In the embodiment, the edge thickness ET1 of the first lens and the edge thickness ET7 of the seventh lens satisfy: 0.2 < ET1 / ET7 < 0.8. Satisfying the condition, on the one hand, the chromatic aberration of the whole system can be better balanced, and on the other hand, the difficulty in actual processing can be avoided to prevent the risk of deformation in the assembly process. The stability of the field curvature is greatly helpful, and the appearance problem is prevented.

[0077] In the embodiment, the distance BFLm on the optical axis from the imaging side of the seventh lens of the mobile focusing optical lens group in close-up shooting to the imaging surface and the sum ∑ATm of the air gaps between the lenses from the first lens to the seventh lens of the mobile focusing optical lens group in close-up shooting on the optical axis satisfy: BFLm / ∑ATm < 0.5. Satisfying the condition, on the premise of ensuring sufficient back focus in close-up shooting, the problem of interference between front and rear lenses in the assembly process caused by too small gap can be avoided, and the air gap between the lenses can be reasonably adjusted to better balance the distortion of the system, reduce ghost image energy, and ensure good imaging quality of the system.

[0078] In the embodiment, the sum ∑ATm of the air gaps between the lenses from the first lens to the seventh lens of the mobile focusing optical lens group in close-up shooting on the optical axis and the distance ∑T67m of the air gap between the sixth lens and the seventh lens of the mobile focusing optical lens group in close-up shooting on the optical axis satisfy: 0.3 < T67m / ∑ATm < 0.8. Satisfying the condition, the structure design of the lens barrel and the spacer and the process of line assembly between the lenses can be ensured, and the distortion of the system can be better balanced. In addition, controlling the condition can also reduce the working stroke of the motor during focusing, and ensure the miniaturization of the mobile focusing optical lens group. Preferably, 0.3 < T67m / ∑ATm < 0.7.

[0079] In the embodiment, the difference amount ΔT of the interval of the first lens group and the second lens group on the optical axis between close-up shooting and telephoto shooting and the sum ∑CT of the thicknesses of the first lens to the fifth lens of the mobile focusing optical lens group on the optical axis satisfy: ΔT / ∑CT < 0.5. Satisfying the condition, on the one hand, the assembly distance requirement is ensured to avoid the problem of interference between the first lens group and the second lens group during the motor operation due to too large distance; on the other hand, the center thickness of each lens is reasonably controlled to avoid the problem of difficult processing and assembly due to too large or too small center thickness. Preferably, ΔT / ∑CT < 0.4.

[0080] In the embodiment, the refractive index N2 of the second lens, the refractive index N3 of the third lens, and the refractive index N4 of the fourth lens satisfy: 4.5 < N2+N3+N4 < 5. The second lens, the third lens, and the fourth lens are sensitive lenses, and the condition is met to improve the refractive index of the second lens, the third lens, and the fourth lens, thereby significantly improving the performance while ensuring that the high and low refractive index interval distribution can better eliminate astigmatism, coma, and the like. Preferably, 4.7 < N2+N3+N4 < 4.9.

[0081] In the embodiment, the number of lenses V 50 satisfies: V 50 ≥ 2. Using lenses with an Abbe number greater than 50 can effectively control chromatic dispersion, and lenses with a low refractive index and an Abbe number greater than 50 are superior to lenses with a high refractive index in terms of molding, appearance, reliability, and processability, and are more difficult to avoid actual processing difficulties to ensure yield.

[0082] Embodiment two

[0083] As Figures 1 to 32 shown, the mobile focusing optical lens group includes a first lens group and a second lens group along the optical axis from the object side to the imaging side, and the second lens group includes at least a seventh lens. The object side surface of the seventh lens is concave, and the imaging side surface is convex. When the object distance of the mobile focusing optical lens group changes from far to near, the interval distance between the first lens group and the second lens group on the optical axis is adjusted to perform focusing. The distance TTLi on the optical axis from the object side surface of the first lens of the mobile focusing optical lens group to the imaging surface when the mobile focusing optical lens group is in a far shot, half of the diagonal line length of the effective pixel area on the imaging surface of the mobile focusing optical lens group when the mobile focusing optical lens group is in a far shot ImgHi, and half of the maximum field angle of the mobile focusing optical lens group when the mobile focusing optical lens group is in a far shot Semi-FOVi satisfy: 1 < TTLi / ImgHi*tan(Semi-FOVi) < 2.

[0084] Preferably, 1.2 < TTLi / ImgHi*tan(Semi-FOVi) < 1.5.

[0085] By reasonably allocating the seventh lens surface type, on the one hand, the distortion and astigmatism of the whole system can be better balanced, and on the other hand, a larger image surface can be obtained, and higher resolution and better imaging quality can be achieved. By reasonably constraining the relationship between the distance TTLi of the object side surface of the first lens of the mobile focusing optical lens group to the imaging surface on the optical axis when shooting at a far distance, the half of the diagonal line length of the effective pixel area on the imaging surface of the mobile focusing optical lens group when shooting at a far distance ImgHi and the half of the maximum field angle Semi-FOVi of the mobile focusing optical lens group when shooting at a far distance, the mobile focusing optical lens group is made to be thinner, the image surface is larger, and the field angle is larger, so that the mobile focusing optical lens group can present more detailed information of the photographed object, and the characteristics of high resolution, large depth of field and large aperture are realized while meeting miniaturization. In addition, the mobile focusing optical lens group of the present application adopts seven lenses, which is beneficial to miniaturization, and can not only maintain clear imaging ability for distant photographed objects in actual shooting process, but also ensure that enough imaging light enters the optical system in close-up shooting, reduces the noise of the imaging picture, improves the imaging effect of close-up shooting, and is beneficial to realizing the characteristics of large depth of field and large aperture.

[0086] In the embodiment, the mobile focusing optical lens group further comprises a diaphragm, and the diaphragm is located on the object side of the second lens. The diaphragm is located between the object side and the second lens, which can realize aperture change, better meet the shooting requirements, at the same time, the long focal end can obtain better resolving power, reduce the design difficulty, and at the same time, the aperture of the lens can be reduced, which is beneficial to miniaturization.

[0087] In the embodiment, the mobile focusing optical lens group satisfies: 0.2 < EPD / Fg1 < 1 between the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group. By constraining the ratio between the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group within a reasonable range, it is ensured that the mobile focusing optical lens group still has sufficient light flux to ensure that the image surface has high illumination under the condition that the near scene light is weak, and excellent imaging quality is maintained. Preferably, 0.2 < EPD / Fg1 < 0.5.

[0088] In the embodiment, the distance Um between the photographed object and the object side surface of the first lens of the mobile focusing optical lens group when shooting at a close distance satisfies: 90mm ≤ Um ≤ 200mm. With the development of the times, users have higher and higher requirements for macro performance, and the mobile focusing optical lens group of the present application can realize clear imaging at a super short distance of 90mm-200mm, meet customer demand, and adapt to a wider life scene. Preferably, 100mm ≤ Um ≤ 180mm.

[0089] In the embodiment, the distance TTLi from the object side of the first lens of the mobile focusing optical lens group to the imaging surface on the optical axis in the far shot, the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the far shot ImgHi, the distance TTLm from the object side of the first lens of the mobile focusing optical lens group to the imaging surface on the optical axis in the close shot, and the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the close shot ImgHm satisfy: |TTLi / ImgHi-TTLm / ImgHm|<0.15. Satisfying the condition, the system total length in the far shot and the close shot is controlled to be similar, the image surface size is controlled to be similar, the module assembly is ensured not to be disadvantageous, the movement of the second lens group in the far shot and the close shot is ensured not to interfere with the module end, the picture change is ensured to be small in the far shot and the close shot, the details of the object are ensured to be more, and the user experience is improved. Preferably, |TTLi / ImgHi-TTLm / ImgHm|≤0.1.

[0090] In the embodiment, the focal length Fg1 of the first lens group, the focal length fi of the mobile focusing optical lens group in the far shot, and the focal length fm of the mobile focusing optical lens group in the close shot satisfy: |Fg1 / fi-Fg1 / fm|<0.1. Satisfying the condition, on the one hand, the distortion and the astigmatism of the whole system are better balanced, and on the other hand, the focal length change amplitude is ensured to be small in the far shot and the close shot, and the motor stroke is controlled to be in a reasonable range.

[0091] In the embodiment, the aperture value fnoi of the mobile focusing optical lens group in the far shot and the aperture value fnom of the mobile focusing optical lens group in the close shot satisfy: 0.9<fnoi / fnom<1.2. Satisfying the condition, the mobile focusing optical lens group in the close shot is ensured to obtain sufficient light flux to ensure that the image surface has high illumination, the whole system change amplitude is ensured to be small, and the motor stroke is controlled to be in a reasonable range.

[0092] In the embodiment, the distance TDm on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in close-up shooting, the distance TTLm on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group in close-up shooting, the distance TDi on the optical axis from the object side of the first lens to the imaging side of the seventh lens of the mobile focusing optical lens group in telephoto shooting, and the distance TTLi on the optical axis from the object side of the first lens to the imaging surface of the mobile focusing optical lens group in telephoto shooting satisfy: 0.8 < (TDi / TTLi) / (TDm / TTLm) < 1. Satisfying the condition formula makes the back focal length more reasonable in close-up shooting and telephoto shooting, prevents the module end from being poor due to excessively large or small back focal length, reduces the working stroke of the motor during focusing, and ensures the miniaturization of the mobile focusing optical lens group.

[0093] In the embodiment, the sum ∑ET of the edge thicknesses of the lenses in the mobile focusing optical lens group and the sum ∑CT of the thicknesses on the optical axis of the first lens to the fifth lens in the mobile focusing optical lens group satisfy: 0.5 < ∑ET / ∑CT < 1. Satisfying the condition formula can better balance the distortion and field curvature of the entire system, ensure that the lenses are not easily deformed during assembly, greatly help the stability of the field curvature, and have greater space for molding and debugging process, thereby avoiding the risk of stray light due to appearance problems of the lenses.

[0094] In the embodiment, the edge thickness ET1 of the first lens and the edge thickness ET7 of the seventh lens satisfy: 0.2 < ET1 / ET7 < 0.8. Satisfying the condition formula can better balance the chromatic aberration of the entire system, avoid difficulties in the actual processing process, prevent the risk of deformation during assembly, greatly help the stability of the field curvature, and prevent the generation of appearance problems.

[0095] In the embodiment, the distance BFLm on the optical axis from the imaging side of the seventh lens to the imaging surface of the mobile focusing optical lens group in close-up shooting and the sum ∑ATm of the distances on the optical axis of the air gaps between the lenses of the first lens to the seventh lens of the mobile focusing optical lens group in close-up shooting satisfy: BFLm / ∑ATm < 0.5. Satisfying the condition formula can ensure that the back focal length has sufficient space in close-up shooting, avoid problems such as interference between front and rear lenses during assembly due to excessively small air gaps, reasonably adjust the air gaps between the lenses, better balance the distortion of the system, reduce ghost image energy, and ensure that the system obtains good imaging quality.

[0096] In the embodiment, the sum of the distances on the optical axis of the air gaps between the first lens and the seventh lens in the first lens group to the seventh lens group of the mobile focusing optical lens group in the close-up state and the distance on the optical axis of the air gap between the sixth lens and the seventh lens of the mobile focusing optical lens group in the close-up state satisfy: 0.3 < T67m / ∑ATm < 0.8. Satisfying the condition formula can ensure the beneficial structure design of the lens barrel and the spacer and the assembly process of the production line, and can better balance the distortion of the system. In addition, controlling the condition formula can also reduce the working stroke of the motor during focusing, thereby ensuring the miniaturization of the mobile focusing optical lens group. Preferably, 0.3 < T67m / ∑ATm < 0.7.

[0097] In the embodiment, the difference ΔT between the interval on the optical axis of the first lens group and the second lens group of the mobile focusing optical lens group in the close-up state and the far shot state and the sum ∑CT of the thicknesses on the optical axis of the first lens to the fifth lens of the mobile focusing optical lens group satisfy: ΔT / ∑CT < 0.5. Satisfying the condition formula can ensure the assembly distance requirement on the one hand, avoiding the problem of interference caused by the too large distance between the first lens group and the second lens group during the operation of the motor; on the other hand, it ensures that the center thickness of each lens is reasonably controlled, avoiding the problems of difficult processing and assembly caused by too large or too small center thickness. Preferably, ΔT / ∑CT < 0.4.

[0098] In the embodiment, the refractive index N2 of the second lens, the refractive index N3 of the third lens and the refractive index N4 of the fourth lens satisfy: 4.5 < N2+N3+N4 < 5. The second lens, the third lens and the fourth lens are sensitive lenses, and satisfying the condition formula is beneficial to improve the refractive index of the second lens, the third lens and the fourth lens, thereby significantly improving the performance, while ensuring that the interval distribution between high and low refractive indices can better eliminate astigmatism, coma and the like. Preferably, 4.7 < N2+N3+N4 < 4.9.

[0099] In the embodiment, the number V of lenses with an Abbe number greater than 50 50 satisfies: V 50 ≥ 2. Using lenses with an Abbe number greater than 50 can effectively control the dispersion, and the low refractive index lenses with an Abbe number greater than 50 are superior to the high refractive index lenses in terms of molding, appearance, reliability and the like, and have better processability, thereby avoiding the difficulties in actual processing and ensuring the yield.

[0100] Optionally, the above mobile focusing optical lens group can further include a filter for correcting color deviation or a protective glass for protecting the photosensitive elements located on the imaging surface.

[0101] The mobile focusing optical lens group in the present application can adopt multiple lenses, for example, the above-mentioned seven lenses. By reasonably allocating the refractive power, surface shape, central thickness of each lens, and the on-axis distance between each lens, etc., the sensitivity can be effectively reduced and the processability can be improved, so that the mobile focusing optical lens group is more conducive to production and processing and can be applied to portable electronic devices such as smart phones. The left side is the object side, and the right side is the imaging side.

[0102] In the present application, at least one of the lens surfaces of each lens is a non-spherical lens surface. The characteristic of the non-spherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the non-spherical lens has better curvature radius characteristics, has the advantages of improving the distortion aberration and improving the astigmatism aberration. After adopting the non-spherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0103] However, those skilled in the art should understand that the number of lenses constituting the mobile focusing optical lens group can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although the seven lenses are described as an example in the embodiments, the mobile focusing optical lens group is not limited to including seven lenses. If necessary, the mobile focusing optical lens group can also include other numbers of lenses.

[0104] The specific surface shape and parameters of the mobile focusing optical lens group applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0105] It should be noted that any one of the following examples one to four is applicable to all embodiments of the present application.

[0106] Example one

[0107] As shown in Figures 1 to 8 , the mobile focusing optical lens group of example one of the present application is described. Figure 1 The structural schematic diagram of the mobile focusing optical lens group of example one when shooting at a far distance is shown; Figure 2 The structural schematic diagram of the mobile focusing optical lens group of example one when shooting at a close distance is shown.

[0108] As shown in Figure 1 and Figure 2 , the mobile focusing optical lens group sequentially includes, from the object side to the imaging side: a first lens group G1, a second lens group G2, a filter E8, and an imaging surface S17. The first lens group G1 includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6; the second lens group G2 includes a seventh lens E7. A stop STO is arranged on the object side of the first lens E1.

[0109] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is convex. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is concave, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is concave, and the image side surface S12 of the sixth lens is convex. The seventh lens E7 has negative refractive power, the object side surface S13 of the seventh lens is concave, and the image side surface S14 of the seventh lens is convex. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the image surface S17.

[0110] In this example, the distance on the optical axis from the object side surface of the first lens to the image surface of the mobile focusing optical lens group in the far shot TTLi is 11.85 mm; the distance on the optical axis from the object side surface of the first lens to the image surface of the mobile focusing optical lens group in the close shot TTLm is 11.85 mm; the half of the diagonal length of the effective pixel area on the image surface of the mobile focusing optical lens group in the far shot ImgHi is 5.32 mm; the half of the diagonal length of the effective pixel area on the image surface of the mobile focusing optical lens group in the close shot ImgHm is 5.12 mm; the focal length fi of the mobile focusing optical lens group in the far shot is 9.61 mm; the focal length fm of the mobile focusing optical lens group in the close shot is 9.42 mm; the half of the maximum field angle Semi-FOVi of the mobile focusing optical lens group in the far shot is 28.59°; the half of the maximum field angle Semi-FOVm of the mobile focusing optical lens group in the close shot is 27.87°.

[0111] Table 1 shows the basic structural parameter table of the mobile focusing optical lens group of Example 1, wherein the units of the radius of curvature and the thickness / distance are millimeters (mm).

[0112]

[0113] Table 1

[0114] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0115]

[0116] wherein x is the sag of the aspherical surface at a height h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S1-S14 in Example 1.

[0117]

[0118]

[0119] Table 2

[0120] Figure 3 Fig. 9 shows the axial chromatic aberration curve of the mobile focusing optical lens assembly of Example 1 at the far shot, which indicates the deviation of the convergent focal points of light rays of different wavelengths after passing through the mobile focusing optical lens assembly. Figure 4 Fig. 10 shows the astigmatism curve of the mobile focusing optical lens assembly of Example 1 at the far shot, which indicates the meridional image curvature and sagittal image curvature. Figure 5 Fig. 11 shows the distortion curve of the mobile focusing optical lens assembly of Example 1 at the far shot, which indicates the distortion values corresponding to different field angles.

[0121] Figure 6 Fig. 14 shows the axial chromatic aberration curve of the mobile focusing optical lens assembly of Example 1 at the close shot, which indicates the deviation of the convergent focal points of light rays of different wavelengths after passing through the mobile focusing optical lens assembly. Figure 7 Fig. 15 shows the astigmatism curve of the mobile focusing optical lens assembly of Example 1 at the close shot, which indicates the meridional image curvature and sagittal image curvature. Figure 8 Fig. 16 shows the distortion curve of the mobile focusing optical lens assembly of Example 1 at the close shot, which indicates the distortion values corresponding to different field angles.

[0122] According to Figures 3 to 8 It can be known that the mobile focusing optical lens assembly given in Example 1 can achieve good imaging quality.

[0123] Example 2

[0124] As Figures 9 to 16 shown, the mobile focusing optical lens assembly of Example 2 of the present application is described. In this example and the following examples, for the sake of brevity, some similar descriptions as in Example 1 will be omitted. Figure 9 Fig. 17 shows a structural schematic diagram of the mobile focusing optical lens assembly of Example 2 at the far shot;Figure 10 A schematic diagram of the moving focus optical lens group in Example 2 during close-up shooting is shown.

[0125] like Figure 9 and Figure 10 As shown, the moving-focus optical lens group, from the object side to the imaging side, includes: a first lens group G1, a second lens group G2, a filter E8, and an imaging plane S17. The first lens group G1 includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6; the second lens group G2 includes a seventh lens E7. The aperture stop S10 is located on the object side of the first lens E1.

[0126] The first lens E1 has positive optical power, its object-side surface S1 is convex, and its imaging-side surface S2 is concave. The second lens E2 has negative optical power, its object-side surface S3 is convex, and its imaging-side surface S4 is concave. The third lens E3 has negative optical power, its object-side surface S5 is concave, and its imaging-side surface S6 is concave. The fourth lens E4 has positive optical power, its object-side surface S7 is concave, and its imaging-side surface S8 is convex. The fifth lens E5 has positive optical power, its object-side surface S9 is convex, and its imaging-side surface S10 is convex. The sixth lens E6 has negative optical power, its object-side surface S11 is concave, and its imaging-side surface S12 is convex. The seventh lens E7 has negative optical power, its object-side surface S13 is concave, and its imaging-side surface S14 is convex. The filter E8 has an object-side surface S15 and an imaging-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17.

[0127] In this example, the distance TTLi from the object side of the first lens of the moving focusing optical lens group to the imaging plane on the optical axis during telephoto shooting is 12.00mm; the distance TTLm from the object side of the first lens of the moving focusing optical lens group to the imaging plane on the optical axis during close-up shooting is 12.00mm; half the diagonal length of the effective pixel area on the imaging plane of the moving focusing optical lens group during telephoto shooting is ImgHi, which is 5.32mm; half the diagonal length of the effective pixel area on the imaging plane of the moving focusing optical lens group during close-up shooting is ImgHm, which is 5.12mm; the focal length fi of the moving focusing optical lens group during telephoto shooting is 9.22mm; the focal length fm of the moving focusing optical lens group during close-up shooting is 8.29mm; half the maximum field of view (Semi-FOVi) of the moving focusing optical lens group during telephoto shooting is 29.99°; and half the maximum field of view (Semi-FOVm) of the moving focusing optical lens group during close-up shooting is 29.98°.

[0128] Table 3 shows the basic structure parameter table of the mobile focusing optical lens set of Example Two, wherein the units of the radius of curvature, thickness / distance are millimeters (mm).

[0129]

[0130] Table 3

[0131] Table 4 shows the high-order term coefficients of each aspherical surface that can be used in Example Two, wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0132] Face No. A4 A6 A8 A10 A12 A14 A16 S1 -4.4267E-04 2.2779E-02 -1.3745E-01 5.0326E-01 -1.1777E+00 1.8511E+00 -2.0133E+00 S2 -1.7201E-02 7.1868E-03 3.4802E-02 -1.3752E-01 3.0859E-01 -4.6814E-01 4.9342E-01 S3 -4.0388E-02 1.9801E-02 1.1167E-03 -3.2351E-02 8.9447E-02 -1.5948E-01 1.8713E-01 S4 -3.1912E-02 7.3547E-03 2.5782E-02 -8.7608E-02 1.7109E-01 -2.2797E-01 2.0809E-01 S5 -3.4512E-02 -9.4028E-03 3.0313E-02 -5.9159E-02 7.1380E-02 -4.8584E-02 8.4829E-03 S6 -1.6070E-02 7.0183E-03 -3.3375E-02 6.8083E-02 -8.0777E-02 6.3004E-02 -3.3963E-02 S7 2.6808E-02 2.7627E-02 -1.0933E-01 1.8894E-01 -2.0322E-01 1.4804E-01 -7.5890E-02 S8 -4.9410E-03 1.2149E-02 -1.9878E-02 1.6795E-02 -7.0959E-03 5.4639E-04 1.0343E-03 S9 -1.4227E-02 4.3083E-03 -4.5395E-03 4.6853E-03 -3.0010E-03 1.2612E-03 -3.6869E-04 S10 9.3110E-03 -7.7235E-03 1.0373E-02 -7.6094E-03 3.5888E-03 -1.1479E-03 2.5114E-04 S11 3.6275E-02 -1.7861E-02 1.7561E-02 -1.2966E-02 6.2675E-03 -2.0743E-03 4.8605E-04 S12 2.2090E-02 -1.2646E-02 9.9483E-03 -5.8357E-03 2.2988E-03 -6.3060E-04 1.2427E-04 S13 8.2455E-03 -1.0240E-02 8.1138E-03 -4.2246E-03 1.5331E-03 -3.9855E-04 7.5320E-05 S14 6.5609E-03 -4.9547E-03 2.5057E-03 -8.6050E-04 2.1186E-04 -3.8188E-05 5.0806E-06 Face No. A18 A20 A22 A24 A26 A28 A30 S1 1.5402E+00 -8.3289E-01 3.1610E-01 -8.2276E-02 1.3977E-02 -1.3955E-03 6.2088E-05 S2 -3.6514E-01 1.9031E-01 -6.9374E-02 1.7293E-02 -2.8068E-03 2.6711E-04 -1.1302E-05 S3 -1.4784E-01 8.0462E-02 -3.0410E-02 7.8767E-03 -1.3381E-03 1.3456E-04 -6.0748E-06 S4 -1.3010E-01 5.5547E-02 -1.5946E-02 2.9591E-03 -3.2583E-04 1.7371E-05 -2.0455E-07 S5 1.6405E-02 -1.7734E-02 9.2988E-03 -2.9602E-03 5.7992E-04 -6.4491E-05 3.1223E-06 S6 1.2957E-02 -3.5260E-03 6.8015E-04 -9.0848E-05 7.9890E-06 -4.1594E-07 9.7096E-09 S7 2.7889E-02 -7.3842E-03 1.3970E-03 -1.8424E-04 1.6087E-05 -8.3581E-07 1.9559E-08 S8 -6.3032E-04 1.9683E-04 -3.8926E-05 5.0574E-06 -4.2055E-07 2.0366E-08 -4.3778E-10 S9 7.7500E-05 -1.1854E-05 1.3099E-06 -1.0178E-07 5.2627E-09 -1.6211E-10 2.2448E-12 S10 -3.6558E-05 3.1970E-06 -9.8242E-08 -1.1067E-08 1.4655E-09 -7.0243E-11 1.2892E-12 S11 -8.1828E-05 9.8829E-06 -8.4074E-07 4.8392E-08 -1.7451E-09 3.3636E-11 -2.2519E-13 S12 -1.7879E-05 1.8832E-06 -1.4372E-07 7.7367E-09 -2.7859E-10 6.0224E-12 -5.9100E-14 S13 -1.0406E-05 1.0480E-06 -7.5947E-08 3.8511E-09 -1.2954E-10 2.5944E-12 -2.3397E-14 S14 -4.9943E-07 3.6075E-08 -1.8872E-09 6.9495E-11 -1.7075E-12 2.5127E-14 -1.6752E-16

[0133] Table 4

[0134] Figure 11 The axial chromatic aberration curve of the mobile focusing optical lens set of Example Two at the time of far shot is shown, which represents the convergence focus point deviation of light rays of different wavelengths after passing through the mobile focusing optical lens set. Figure 12 The astigmatism curve of the mobile focusing optical lens set of Example Two at the time of far shot is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 13 The distortion curve of the mobile focusing optical lens set of Example Two at the time of far shot is shown, which represents the distortion size values corresponding to different field angles.

[0135] Figure 14 The axial chromatic aberration curve of the mobile focusing optical lens set of Example Two at the time of close shot is shown, which represents the convergence focus point deviation of light rays of different wavelengths after passing through the mobile focusing optical lens set. Figure 15 The astigmatism curve of the mobile focusing optical lens set of Example Two at the time of close shot is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 16 The distortion curve of the mobile focusing optical lens set of Example Two at the time of close shot is shown, which represents the distortion size values corresponding to different field angles.

[0136] According to Figures 11 to 16 It can be known that the mobile focusing optical lens set given in Example Two can achieve good imaging quality.

[0137] Example Three

[0138] As Figures 17 to 24 shown, the mobile focusing optical lens set of Example Three of the present application is described. Figure 17 The structural schematic diagram of the mobile focusing optical lens set of Example Three at the time of far shot is shown; Figure 18 The structural schematic diagram of the mobile focusing optical lens set of Example Three at the time of close shot is shown.

[0139] As Figure 17 and Figure 18As shown, the mobile focusing optical lens group sequentially comprises, from the object side to the imaging side: a first lens group G1, a second lens group G2, a filter E8, and an imaging surface S17. The first lens group G1 comprises: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6; the second lens group G2 comprises a seventh lens E7. The stop STO is arranged on the object side of the first lens E1.

[0140] The first lens E1 has negative refractive power, the object side surface S1 of the first lens is convex, and the imaging side surface S2 of the first lens is concave. The second lens E2 has positive refractive power, the object side surface S3 of the second lens is convex, and the imaging side surface S4 of the second lens is convex. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is convex, and the imaging side surface S6 of the third lens is concave. The fourth lens E4 has negative refractive power, the object side surface S7 of the fourth lens is concave, and the imaging side surface S8 of the fourth lens is convex. The fifth lens E5 has positive refractive power, the object side surface S9 of the fifth lens is concave, and the imaging side surface S10 of the fifth lens is convex. The sixth lens E6 has positive refractive power, the object side surface S11 of the sixth lens is convex, and the imaging side surface S12 of the sixth lens is concave. The seventh lens E7 has negative refractive power, the object side surface S13 of the seventh lens is concave, and the imaging side surface S14 of the seventh lens is convex. The filter E8 has an object side surface S15 and an imaging side surface S16. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.

[0141] In this example, the distance on the optical axis from the object side surface of the first lens to the imaging surface of the mobile focusing optical lens group in the telephoto state is TTLi = 12.00 mm; the distance on the optical axis from the object side surface of the first lens to the imaging surface of the mobile focusing optical lens group in the close-up state is TTLm = 12.00 mm; the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the telephoto state is ImgHi = 5.00 mm; the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the close-up state is ImgHm = 4.80 mm; the focal length fi of the mobile focusing optical lens group in the telephoto state is 8.32 mm; the focal length fm of the mobile focusing optical lens group in the close-up state is 7.86 mm; the half of the maximum field angle of the mobile focusing optical lens group in the telephoto state is Semi-FOVi = 29.97°; the half of the maximum field angle of the mobile focusing optical lens group in the close-up state is Semi-FOVm = 29.62°.

[0142] Table 5 shows the basic structural parameter table of the mobile focusing optical lens group of Example 3, wherein the units of the curvature radius, thickness / distance are millimeters (mm).

[0143]

[0144]

[0145] Table 5

[0146] Table 6 shows the high order term coefficients of each aspherical surface in Example Three, wherein each aspherical surface type can be defined by the formula (1) given in Example One.

[0147] Face No. A4 A6 A8 A10 A12 A14 A16 S1 -2.2503E-02 3.8430E-02 -2.0696E-01 6.3158E-01 -1.2449E+00 1.6836E+00 -1.6140E+00 S2 -1.7928E-02 1.2303E-03 -1.1330E-01 4.3456E-01 -9.1402E-01 1.2440E+00 -1.1577E+00 S3 1.4813E-02 1.4092E-02 -1.9548E-01 6.5058E-01 -1.2749E+00 1.6619E+00 -1.5062E+00 S4 1.0558E-02 -1.3719E-02 6.4078E-02 -1.6810E-01 2.8005E-01 -3.2255E-01 2.6639E-01 S5 -3.9018E-02 1.3357E-02 1.4133E-02 -5.4074E-02 8.2194E-02 -8.0230E-02 5.4995E-02 S6 -4.2507E-02 2.0471E-02 -9.8874E-03 8.1022E-03 -1.2998E-02 1.6376E-02 -1.3504E-02 S7 -4.3571E-02 1.1596E-02 -1.2998E-02 1.2449E-02 -5.5713E-03 -2.3998E-03 5.5853E-03 S8 -3.5022E-02 8.4207E-03 -3.8833E-03 -1.8334E-03 6.8829E-03 -7.6694E-03 5.0503E-03 S9 3.5788E-02 -1.3386E-02 -1.8354E-03 1.1926E-02 -1.3477E-02 8.9219E-03 -3.9369E-03 S10 4.4102E-03 -5.8604E-03 6.6855E-03 -3.7965E-03 1.2554E-03 -2.0759E-04 -1.1039E-05 S11 -1.9971E-02 -2.5098E-03 6.0287E-03 -4.0368E-03 1.7147E-03 -5.1334E-04 1.1228E-04 S12 -1.7137E-02 -5.9954E-04 1.9106E-03 -8.1786E-04 1.7195E-04 -7.8718E-06 -6.0067E-06 Face No. A18 A20 A22 A24 A26 A28 A30 S1 1.1155E+00 -5.5820E-01 2.0059E-01 -5.0508E-02 8.4673E-03 -8.4964E-04 3.8641E-05 S2 7.5493E-01 -3.4747E-01 1.1203E-01 -2.4674E-02 3.5206E-03 -2.9165E-04 1.0566E-05 S3 9.6831E-01 -4.4394E-01 1.4398E-01 -3.2231E-02 4.7314E-03 -4.0937E-04 1.5806E-05 S4 -1.6006E-01 7.0021E-02 -2.2037E-02 4.8526E-03 -7.0852E-04 6.1530E-05 -2.4025E-06 S5 -2.7254E-02 9.8295E-03 -2.5569E-03 4.6730E-04 -5.6905E-05 4.1426E-06 -1.3627E-07 S6 7.4840E-03 -2.8509E-03 7.4787E-04 -1.3243E-04 1.5061E-05 -9.8752E-07 2.8160E-08 S7 -4.2094E-03 1.8794E-03 -5.4702E-04 1.0513E-04 -1.2902E-05 9.1819E-07 -2.8873E-08 S8 -2.1965E-03 6.5446E-04 -1.3455E-04 1.8788E-05 -1.7022E-06 9.0290E-08 -2.1286E-09 S9 1.2088E-03 -2.6220E-04 4.0050E-05 -4.2153E-06 2.9093E-07 -1.1847E-08 2.1567E-10 S10 1.5002E-05 -3.9653E-06 5.9607E-07 -5.6708E-08 3.3878E-09 -1.1633E-10 1.7497E-12 S11 -1.8176E-05 2.1748E-06 -1.8972E-07 1.1716E-08 -4.8469E-10 1.2034E-11 -1.3545E-13 S12 1.9700E-06 -3.2991E-07 3.5234E-08 -2.4893E-09 1.1324E-10 -3.0156E-12 3.5801E-14

[0148] Figure 19 Figure 20 shows the axial chromatic aberration curve of the moving focus optical lens set of Example Three at the far shot, which represents the convergence focus point deviation of light rays of different wavelengths after passing through the moving focus optical lens set. Figure 20 Figure 21 shows the astigmatism curve of the moving focus optical lens set of Example Three at the far shot, which represents the meridional image curvature and sagittal image curvature. Figure 21 Figure 22 shows the distortion curve of the moving focus optical lens set of Example Three at the far shot, which represents the distortion size values corresponding to different field angles.

[0149] Figure 22 Figure 23 shows the axial chromatic aberration curve of the moving focus optical lens set of Example Three at the close shot, which represents the convergence focus point deviation of light rays of different wavelengths after passing through the moving focus optical lens set. Figure 23 Figure 24 shows the astigmatism curve of the moving focus optical lens set of Example Three at the close shot, which represents the meridional image curvature and sagittal image curvature. Figure 24 Figure 25 shows the distortion curve of the moving focus optical lens set of Example Three at the close shot, which represents the distortion size values corresponding to different field angles.

[0150] According to Figures 19 to 24 It can be known that the moving focus optical lens set given in Example Three can achieve good imaging quality.

[0151] Example Four

[0152] As Figures 25 to 32 shown, the moving focus optical lens set of Example Four of the present application is described. Figure 25 Figure 27 shows a structural schematic diagram of the moving focus optical lens set of Example Four at the far shot; Figure 26 Figure 28 shows a structural schematic diagram of the moving focus optical lens set of Example Four at the close shot.

[0153] As Figure 25 and Figure 26As shown, the mobile focusing optical lens group sequentially comprises, from the object side to the imaging side: a first lens group G1, a second lens group G2, a filter E8, and an imaging surface S17. The first lens group G1 comprises: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6; the second lens group G2 comprises a seventh lens E7. The stop STO is arranged on the object side of the first lens E1.

[0154] The first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the imaging side surface S2 of the first lens is concave. The second lens E2 has negative refractive power, the object side surface S3 of the second lens is convex, and the imaging side surface S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side surface S5 of the third lens is concave, and the imaging side surface S6 of the third lens is convex. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is concave, and the imaging side surface S8 of the fourth lens is convex. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is convex, and the imaging side surface S10 of the fifth lens is concave. The sixth lens E6 has negative refractive power, the object side surface S11 of the sixth lens is concave, and the imaging side surface S12 of the sixth lens is concave. The seventh lens E7 has positive refractive power, the object side surface S13 of the seventh lens is concave, and the imaging side surface S14 of the seventh lens is convex. The filter E8 has an object side surface S15 and an imaging side surface S16. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.

[0155] In this example, the distance on the optical axis from the object side surface of the first lens to the imaging surface of the mobile focusing optical lens group in the telephoto state TTLi is 13.20 mm; the distance on the optical axis from the object side surface of the first lens to the imaging surface of the mobile focusing optical lens group in the close-up state TTLm is 13.20 mm; the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the telephoto state ImgHi is 7.35 mm; the half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in the close-up state ImgHm is 7.15 mm; the focal length fi of the mobile focusing optical lens group in the telephoto state is 8.81 mm; the focal length fm of the mobile focusing optical lens group in the close-up state is 8.96 mm; the half of the maximum field angle Semi-FOVi of the mobile focusing optical lens group in the telephoto state is 39.27°; the half of the maximum field angle Semi-FOVm of the mobile focusing optical lens group in the close-up state is 39.03°.

[0156] Table 7 shows the basic structure parameter table of the mobile focusing optical lens group of Example Four, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0157]

[0158] Table 7

[0159] Table 8 shows the high order term coefficients of each aspherical surface in Example Four, wherein each aspherical surface type can be defined by the formula (1) given in Example One.

[0160]

[0161]

[0162] Table 8

[0163] Figure 27 Figure 19 shows the axial chromatic aberration curve of the moving focus optical lens assembly of Example Four at the far shot, which indicates the convergence point deviation of light rays of different wavelengths after passing through the moving focus optical lens assembly. Figure 28 Figure 20 shows the astigmatism curve of the moving focus optical lens assembly of Example Four at the far shot, which indicates the meridional image curvature and sagittal image curvature. Figure 29 Figure 21 shows the distortion curve of the moving focus optical lens assembly of Example Four at the far shot, which indicates the distortion size values corresponding to different field angles.

[0164] Figure 30 Figure 22 shows the axial chromatic aberration curve of the moving focus optical lens assembly of Example Four at the close shot, which indicates the convergence point deviation of light rays of different wavelengths after passing through the moving focus optical lens assembly. Figure 31 Figure 23 shows the astigmatism curve of the moving focus optical lens assembly of Example Four at the close shot, which indicates the meridional image curvature and sagittal image curvature. Figure 32 Figure 24 shows the distortion curve of the moving focus optical lens assembly of Example Four at the close shot, which indicates the distortion size values corresponding to different field angles.

[0165] According to Figures 27 to 32 It can be known that the moving focus optical lens assembly given in Example Four can achieve good imaging quality.

[0166] In summary, Examples One to Four respectively satisfy the relationships shown in Table 9.

[0167] Conditional Expression / Example 1 2 3 4 EPD / Fg1 0.40 0.30 0.47 0.43 TTLi / ImgHi*tan(Semi-FOVi) 1.21 1.30 1.38 1.47 |TTLi / ImgHi-TTLm / ImgHm| 0.09 0.09 0.10 0.05 |Fg1 / fi-Fg1 / fm| 0.02 0.09 0.05 0.01 fnoi / fnom 1.02 1.11 1.06 0.98 (TDi / TTLi) / (TDm / TTLm) 0.82 0.84 0.89 0.91 ∑ET / ∑CT 0.83 0.98 0.88 0.89 ET1 / ET7 0.39 0.32 0.24 0.23 BFLm / ∑ATm 0.28 0.18 0.49 0.11 T67m / ∑ATm 0.53 0.44 0.50 0.63 △T / ∑CT 0.35 0.27 0.18 0.17 N2+N3+N4 4.89 4.82 4.88 4.75

[0168] Table 9

[0169] Table 10 shows the distance on the optical axis from the object side surface of the first lens element to the image plane of the mobile focusing optical lens group in the case of the far shot TTLi, the distance on the optical axis from the object side surface of the first lens element to the image plane of the mobile focusing optical lens group in the case of the close shot TTLm, the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group in the case of the far shot ImgHi, the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group in the case of the close shot ImgHm, and the like of Example 1 to Example 4.

[0170] Parameter / Example 1 2 3 4 TTLi(mm) 11.85 12.00 12.00 13.20 TTLm(mm) 11.85 12.00 12.00 13.20 ImgHi(mm) 5.32 5.32 5.00 7.35 ImgHm(mm) 5.12 5.12 4.80 7.15 fi(mm) 9.61 9.22 8.32 8.81 fm(mm) 9.42 8.29 7.86 8.96 Fg1 7.92 7.58 7.05 7.31 △T(mm) 1.88 1.83 1.07 1.07 Semi-FOVi(°) 28.59 29.99 29.97 39.27 Semi-FOVm(°) 27.87 29.98 29.62 39.03 fnoi(mm) 3.00 4.00 2.50 2.80 fnom(mm) 2.95 3.60 2.36 2.85 TDi(mm) 8.53 9.37 8.97 11.47 TDm(mm) 10.42 11.20 10.04 12.54 BLi(mm) 3.32 2.63 3.03 1.73 BLm(mm) 1.43 0.80 1.96 0.66 EPD(mm) 3.20 2.30 3.33 3.15 Um(mm) 100.00 120.00 180.00 150.00 V 50 ]]> 3 3 3 3 f1(mm) 6.44 10.56 -36.20 19.46 f2(mm) -19.23 -227.06 7.24 -25.57 f3(mm) -86.22 -13.72 -27.51 15.81 f4(mm) 11.73 22.67 -19.96 8.39 f5(mm) 26.85 5.14 12.70 -18.26 f6(mm) -22.79 -7.40 20.88 -2515.86 f7(mm) -112.20 -19.72 -21.84 74.76

[0171] Table 10

[0172] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the mobile focusing optical lens group described above.

[0173] Obviously, the above-described embodiments are only some, but not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0174] It is to be noted that the terms used herein are merely used to describe particular embodiments, and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0175] It should be noted that the terms "first", "second", and the like, used in the specification and the appended claims of the present application are intended to distinguish between similar objects, but are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so construed can be interchanged, in order to describe the embodiments of the present application herein described in any order other than those illustrated or described herein.

[0176] The preferred embodiments of the present application have been described above with the aid of drawings and are not intended to limit the application, which can be modified and changed by those skilled in the art without departing from the spirit and principles of the application. Any modification, equivalent replacement, improvement, and the like made within the spirit and principles of the present application should be included in the scope of the present application.

Claims

1. A mobile focusing optical lens assembly, characterized in that, sequentially include, along the optical axis from the object side to the imaging side: a first lens group; a second lens group, the second lens group comprising at least a seventh lens, the object side surface of the seventh lens being concave, and the imaging side surface of the seventh lens being convex; the total number of lenses with optical power in the mobile focusing optical lens group is seven; the first lens group is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; the object side surface of the first lens is convex, the imaging side surface of the first lens is concave, the object side surface of the fourth lens is concave, and the imaging side surface of the fourth lens is convex; the first lens has positive optical power, the second lens has negative optical power, the third lens has negative optical power, the fourth lens has positive optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, and the seventh lens has negative optical power; or, the first lens has negative optical power, the second lens has positive optical power, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power; or, the first lens has positive optical power, the second lens has negative optical power, the third lens has positive optical power, the fourth lens has positive optical power, the fifth lens has negative optical power, the sixth lens has negative optical power, and the seventh lens has positive optical power; wherein, when the distance between the object and the mobile focusing optical lens group changes from far to near, the interval distance between the first lens group and the second lens group on the optical axis is adjusted to perform focusing; the distance TTLi on the optical axis from the object side surface of the first lens to the imaging surface of the mobile focusing optical lens group in a far shot, half of the diagonal length of the effective pixel area on the imaging surface of the mobile focusing optical lens group in a far shot ImgHi, and half of the maximum field of view angle Semi-FOVi of the mobile focusing optical lens group in a far shot satisfy: 1.21≤TTLi / ImgHi*tan(Semi-FOVi)≤1.

47.

2. The mobile focusing optical lens according to claim 1, wherein, The mobile focusing optical lens group further comprises a diaphragm, the diaphragm being located on the object side of the second lens; the entrance pupil diameter EPD of the mobile focusing optical lens group and the focal length Fg1 of the first lens group satisfy: 0.30≤EPD / Fg1≤0.

47.

3. The mobile focusing optical lens according to claim 1, wherein, In a close shot, the distance Um between the object and the object side surface of the first lens of the mobile focusing optical lens group satisfies: 100.00mm≤Um≤180.00mm.

4. The mobile focusing optical lens according to claim 1, wherein, The distance TTLi on the optical axis from the object side of the first lens to the image plane of the mobile focusing optical lens group in the far shot, the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group in the far shot ImgHi, the distance TTLm on the optical axis from the object side of the first lens to the image plane of the mobile focusing optical lens group in the close shot, and the half of the diagonal length of the effective pixel area on the image plane of the mobile focusing optical lens group in the close shot ImgHm satisfy: 0.05≤|TTLi / ImgHi-TTLm / ImgHm|≤0.

10.

5. The mobile focusing optical lens according to claim 1, wherein, The focal length Fg1 of the first lens group, the focal length fi of the mobile focusing optical lens group in the far shot, and the focal length fm of the mobile focusing optical lens group in the close shot satisfy: 0.01≤|Fg1 / fi-Fg1 / fm|<0.

1.

6. The mobile focusing optical lens according to claim 1, wherein, The aperture value fnoi of the mobile focusing optical lens group in the far shot and the aperture value fnom of the mobile focusing optical lens group in the close shot satisfy: 0.98≤fnoi / fnom≤1.

11.

7. The mobile focusing optical lens according to claim 1, wherein, The distance TDm on the optical axis from the object side of the first lens to the image side of the seventh lens of the mobile focusing optical lens group in the close shot, the distance TTLm on the optical axis from the object side of the first lens to the image plane of the mobile focusing optical lens group in the close shot, the distance TDi on the optical axis from the object side of the first lens to the image side of the seventh lens of the mobile focusing optical lens group in the far shot, and the distance TTLi on the optical axis from the object side of the first lens to the image plane of the mobile focusing optical lens group in the far shot satisfy: 0.8<(TDi / TTLi) / (TDm / TTLm)≤0.

91.

8. The mobile focusing optical lens according to claim 1, wherein, The total edge thickness ∑ET of each lens in the mobile focusing optical lens group and the total thickness ∑CT of the first lens to the fifth lens on the optical axis respectively satisfy: 0.83≤∑ET / ∑CT<1.

9. The mobile focusing optical lens according to claim 1, wherein, The edge thickness ET1 of the first lens and the edge thickness ET7 of the seventh lens satisfy: 0.23≤ET1 / ET7≤0.

39.

10. The mobile focusing optical lens according to claim 1, wherein, The distance BFLm on the optical axis from the image side of the seventh lens to the image plane of the mobile focusing optical lens group in the close shot and the sum ∑ATm of the distances on the optical axis of the air gaps between the first lens to the seventh lens of the mobile focusing optical lens group in the close shot satisfy: 0.11≤BFLm / ∑ATm<0.

5.

11. The mobile focusing optical lens according to claim 1, wherein, The sum ∑ATm of the distances on the optical axis of the air gaps between the first lens to the seventh lens of the mobile focusing optical lens group in the close shot and the distance ∑T67m on the optical axis of the air gaps between the sixth lens to the seventh lens of the mobile focusing optical lens group in the close shot satisfy: 0.44≤T67m / ∑ATm≤0.

63.

12. The mobile focusing optical lens according to claim 1, wherein, The difference ΔT between the interval of the first lens group and the second lens group on the optical axis of the mobile focusing optical lens group at the time of close-up shooting and long-range shooting and the total thickness ∑CT of the first lens to the fifth lens of the mobile focusing optical lens group on the optical axis satisfy: 0.17≤ΔT / ∑CT≤0.

35.

13. The mobile focusing optical lens according to claim 1, wherein, The refractive index N2 of the second lens, the refractive index N3 of the third lens and the refractive index N4 of the fourth lens satisfy: 4.75≤N2+N3+N4≤4.

89.

14. The mobile focusing optical lens according to claim 1, wherein, Number of lenses V with Abbe number greater than 50 50 Satisfies: 3 ≥ V 50 ≥ 2.

Images