Mobile zoom optical system

Abstract

The invention relates to a mobile zoom optical system, which sequentially comprises a first lens cone, a second lens cone and a third lens cone along the direction of an optical axis, the first lens cone and the third lens cone are fixed assemblies, the second lens cone is a mobile assembly, the first lens cone comprises a first lens and a first spacing element abutting against the image side surface of the first lens, and the third lens cone comprises a second lens and a third spacing element abutting against the image side surface of the third lens. The second lens barrel comprises a second lens, a second spacing element abutting against the image side face of the second lens, a third lens, a third spacing element abutting against the image side face of the third lens, and a fourth lens. The third lens barrel comprises a fifth lens, a fifth spacing element abutting against the image side face of the fifth lens, a sixth lens, a sixth spacing element abutting against the image side face of the sixth lens, a seventh lens and a seventh spacing element abutting against the image side face of the seventh lens. The movable zoom optical system meets the condition that f234 / EP23 is larger than or equal to 7.32 and smaller than or equal to 9.74. And [delta] f / dbs-dbm is greater than or equal to 2.26 and less than or equal to 10.48.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and in particular to a mobile zoom optical system. Background Art

[0002] With the widespread adoption of smartphones, users' expectations for mobile photography capabilities have continuously increased. They are no longer satisfied with basic photo functions but are eager for more professional and higher-quality images. Introducing optical zoom technology into mobile phones has long faced numerous physical and engineering challenges. Space constraints are a primary concern, as the trend toward thinner and lighter mobile phone designs collides with the multiple lens groups and drive structures required for optical zoom. Furthermore, image quality suffers from significant shortcomings: in low-light scenes, insufficient light intake leads to loss of detail due to sensor cropping, resulting in high-magnification zoom images with high noise and poor dynamic range. To overcome these bottlenecks, R&D focused on innovative optical structures and the use of multi-group lens movement technology to dynamically adjust the focal length. This improves zoom precision and enables higher-magnification zoom effects while maintaining a slim and lightweight design. Another key area of focus is the use of a large aperture and a large sensor, significantly enhancing image quality in low-light conditions.

[0003] However, in existing zoom lenses, since the lens group in the movable lens barrel bears the main optical focal length, stray light problems are easily encountered in the process of meeting the zoom performance and lightweight design of the lens, which can easily lead to a decrease in image quality. Summary of the Invention

[0004] One advantage of the present application is that it provides a mobile zoom optical system that can improve zoom accuracy, achieve high-magnification and precise zoom, and at the same time meet ultra-thin design requirements.

[0005] The present application provides a mobile zoom optical system comprising a first lens barrel, a second lens barrel and a third lens barrel in sequence along the optical axis direction;

[0006] The first lens barrel and the third lens barrel are fixed components, and the second lens barrel is a movable component;

[0007] The first lens barrel contains a first lens with positive optical power and a first spacer element;

[0008] The first spacer element is disposed against the image side surface of the first lens;

[0009] The second lens barrel includes a second lens with positive optical power, a second spacing element, a third lens with negative optical power, a third spacing element, and a fourth lens with positive optical power;

[0010] The second spacer element is disposed against the image side surface of the second lens, and the third spacer element is disposed against the image side surface of the third lens;

[0011] The third lens barrel comprises a fifth lens with negative optical power, a fifth spacer, a sixth lens with positive or negative optical power, a sixth spacer, a seventh lens with negative optical power, and a seventh spacer;

[0012] The fifth spacer is disposed against the image side surface of the fifth lens, the sixth spacer is disposed against the image side surface of the sixth lens, and the seventh spacer is disposed against the image side surface of the seventh lens; and the following conditions are satisfied:

[0013] 7.32≤f234 / EP23≤9.74;

[0014] 2.26≤Δf / |dbs-dbm|≤10.48;

[0015] Among them, f234 is the combined focal length of the second lens, the third lens and the fourth lens, EP23 is the distance between the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis, Δf is the change in the system effective focal length of the mobile zoom optical system from the first state to the second state, dbs is the inner diameter of the object side surface of the second lens barrel, and dbm is the inner diameter of the image side surface of the second lens barrel.

[0016] In some embodiments of the present application, the mobile zoom optical system also satisfies: 5.38≤dam / ΔT≤5.94; wherein, dam is the inner diameter of the image side of the first lens barrel, and ΔT is the maximum movable distance of the second lens barrel along the optical axis when the mobile zoom optical system changes from the first state to the second state.

[0017] In some embodiments of the present application, the mobile zoom optical system further satisfies: 1.51≤EP56 / CT6≤2.11; wherein, EP56 is the distance from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0018] In some embodiments of the present application, the mobile zoom optical system further satisfies: 7.61≤R14 / CP7≤12.49; wherein R14 is the radius of curvature of the image side surface of the seventh lens, and CP7 is the maximum thickness of the seventh spacer element along the optical axis.

[0019] In some embodiments of the present application, the mobile zoom optical system also satisfies: 1.05<CT1 / (D1s-d1s)<1.85; wherein CT1 is the center thickness of the first lens on the optical axis, D1s is the outer diameter of the side surface of the first spacer element object, and d1s is the inner diameter of the side surface of the first spacer element object.

[0020] In some embodiments of the present application, the mobile zoom optical system also satisfies: 2.26≤d2s / (R4+R5)≤5.22; wherein, d2s is the inner diameter of the object side of the second spacer element, R4 is the curvature radius of the image side of the second lens, and R5 is the curvature radius of the object side of the third lens.

[0021] In some embodiments of the present application, the mobile zoom optical system further satisfies: -1.7<f567 / D6s<-1.4; wherein f567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, and D6s is the outer diameter of the side surface of the sixth spacer element.

[0022] In some embodiments of the present application, the mobile zoom optical system further satisfies: 1.05≤f4 / D3m≤1.38; wherein f4 is the effective focal length of the fourth lens, and D3m is the outer diameter of the image-side surface of the third spacing element.

[0023] In some embodiments of the present application, the mobile zoom optical system also satisfies: 4.88≤Lc / (CP6+EP67)≤8.63; wherein, Lc is the maximum height of the third lens barrel, CP6 is the maximum thickness of the sixth spacer element along the optical axis, and EP67 is the distance from the image side surface of the sixth spacer element to the object side surface of the seventh spacer element along the optical axis.

[0024] In some embodiments of the present application, the mobile zoom optical system also satisfies: 0.8<CP1 / (D1m-d1m)<1.6; wherein CP1 is the maximum thickness of the first spacer element along the optical axis, D1m is the outer diameter of the image side surface of the first spacer element, and d1m is the inner diameter of the image side surface of the first spacer element.

[0025] In some embodiments of the present application, the mobile zoom optical system also satisfies: -2.89≤f5 / (d5s+d5m)≤-2.08; wherein f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side of the fifth spacer element, and d5m is the inner diameter of the image side of the fifth spacer element.

[0026] In some embodiments of the present application, the mobile zoom optical system also satisfies: 1.15≤(Das-das) / La≤2.09; wherein Das is the outer diameter of the object side of the first lens barrel, das is the inner diameter of the object side of the first lens barrel, and La is the maximum height of the first lens barrel.

[0027] In some embodiments of the present application, the mobile zoom optical system further satisfies: 1.08≤Lc / (Dcs-dcs)≤1.97; wherein Lc is the maximum height of the third lens barrel, Dcs is the outer diameter of the object side of the third lens barrel, and dcs is the inner diameter of the object side of the third lens barrel.

[0028] In some embodiments of the present application, the mobile zoom optical system also satisfies: 6.05<(d2m+d3m) / ΔT<6.65; wherein d2m is the inner diameter of the image side surface of the second spacing element, d3m is the inner diameter of the image side surface of the third spacing element, and ΔT is the maximum movable distance of the second lens barrel along the optical axis when the mobile zoom optical system changes from the first state to the second state.

[0029] In summary, the present application provides a mobile zoom optical system. Under the premise of satisfying the conditional formula 7.32≤f234 / EP23≤9.74, the second group mainly relies on the third lens to bear the main optical focal length. The thick edge thickness of the third lens easily causes difficult-to-optimize internal reflection stray light problems at the supporting and mating positions of the lenses. Therefore, the present application uses the constraint conditional formula 2.26≤Δf / |dbs-dbm|≤10.48 to reasonably control the inner diameters of the object side and image side of the second lens barrel. The outer diameter of the lens in the second lens barrel is also adjusted accordingly, achieving the outward shift of the lens supporting position to a reasonable range, thereby reducing stray light reflected from the second lens barrel to the supporting position, thereby ensuring the quality of the lens imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of structural parameters of a mobile zoom optical system according to one embodiment of the present application;

[0031] Figure 2 Based on Figure 1 A schematic diagram of some size parameters of the mobile zoom optical system shown;

[0032] Figure 3A 1 is a schematic structural diagram of a mobile zoom optical system in a first state according to the first embodiment of the present application;

[0033] Figure 3B is a schematic structural diagram of the mobile zoom optical system in the second state according to the first embodiment of the present application;

[0034] Figure 4Ais a schematic structural diagram of a mobile zoom optical system in a first state according to a second embodiment of the present application;

[0035] Figure 4B is a schematic structural diagram of a mobile zoom optical system in a second state according to the second embodiment of the present application;

[0036] Figure 5A is a structural schematic diagram of a mobile zoom optical system in a first state according to a third embodiment of the present application;

[0037] Figure 5B is a structural schematic diagram of a mobile zoom optical system in a second state according to the third embodiment of the present application;

[0038] Figure 6A Schematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0039] Figure 6B Schematic diagrams of astigmatism curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0040] Figure 6C Schematic diagrams of distortion curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0041] Figure 6D Schematic diagrams of magnification chromatic aberration curves of the optical lenses according to the first, second, and third embodiments of the present application are shown;

[0042] Figure 7A is a structural schematic diagram of a mobile zoom optical system in a first state according to a fourth embodiment of the present application;

[0043] Figure 7B is a schematic structural diagram of a mobile zoom optical system in a second state according to a fourth embodiment of the present application;

[0044] Figure 8A is a schematic structural diagram of a mobile zoom optical system in a first state according to a fifth embodiment of the present application;

[0045] Figure 8B is a structural schematic diagram of a mobile zoom optical system in a second state according to a fifth embodiment of the present application;

[0046] Figure 9A is a structural schematic diagram of a mobile zoom optical system in a first state according to a sixth embodiment of the present application;

[0047] Figure 9Bis a schematic structural diagram of a mobile zoom optical system in a second state according to a sixth embodiment of the present application;

[0048] Figure 10A Schematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0049] Figure 10B Schematic diagrams of astigmatism curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0050] Figure 10C Schematic diagrams of distortion curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0051] Figure 10D Schematic diagrams of magnification chromatic aberration curves of the optical lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0052] Figure 11A is a structural schematic diagram of a mobile zoom optical system in a first state according to a seventh embodiment of the present application;

[0053] Figure 11B is a schematic structural diagram of a mobile zoom optical system in a second state according to a seventh embodiment of the present application;

[0054] Figure 12A is a schematic structural diagram of a mobile zoom optical system in a first state according to an eighth embodiment of the present application;

[0055] Figure 12B is a schematic structural diagram of a mobile zoom optical system in a second state according to an eighth embodiment of the present application;

[0056] Figure 13A is a structural schematic diagram of a mobile zoom optical system in a first state according to a ninth embodiment of the present application;

[0057] Figure 13B is a schematic structural diagram of a mobile zoom optical system in a second state according to a ninth embodiment of the present application;

[0058] Figure 14A Schematic diagrams of on-axis chromatic aberration curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0059] Figure 14B Schematic diagrams of astigmatism curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0060] Figure 14C Schematic diagrams of distortion curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0061] Figure 14D Schematic diagrams of magnification chromatic aberration curves of the optical lenses according to the seventh, eighth, and ninth embodiments of the present application are shown.

[0062] Figure 15 is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=4.0;

[0063] Figure 16 This is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=1.7;

[0064] Figure 17 This is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=11.2.

[0065] Reference numerals:

[0066] E1, first lens; E2, second lens; E3, third lens; E4, fourth lens; E5, fifth lens; E6, sixth lens; E7, seventh lens; E8, flat glass; PM1, first prism; PM2, second prism; P1, first spacer; P2, second spacer; P3, third spacer; P5, fifth spacer; P6, sixth spacer; P7, seventh spacer. DETAILED DESCRIPTION

[0067] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely 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.

[0068] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0069] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0070] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it indicates that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it indicates that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to common methods in the art, for example, by determining whether it is concave or convex based on the positive or negative R value (R refers to the radius of curvature of the paraxial region). In this document, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, a positive R value indicates a convex surface, and a negative R value indicates a concave surface. For the image-side surface, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0071] 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 preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features 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.

[0072] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0073] 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 following examples only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent of this application. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0074] According to one aspect of this application, Figure 1 and Figure 2 As shown, Figure 1 Schematic diagram of structural parameters of a mobile zoom optical system according to one embodiment of the present application; Figure 2 Based on Figure 1 The mobile zoom optical system shown in the figure is a schematic diagram of some size parameters. The mobile zoom optical system provided by the present application includes a first lens barrel Pa, a second lens barrel Pb and a third lens barrel Pc in sequence along the optical axis direction;

[0075] The first lens barrel Pa and the third lens barrel Pc are fixed components, and the second lens barrel Pb is a movable component;

[0076] The first lens barrel Pa contains a first lens E1 with positive refractive power and a first spacer element P1;

[0077] The first spacer element P1 is disposed against the image side surface of the first lens E1;

[0078] The second lens barrel Pb includes a second lens E2 with positive refractive power, a second spacer element P2, a third lens E3 with negative refractive power, a third spacer element P3, and a fourth lens E4 with positive refractive power;

[0079] The second spacer element P2 is disposed against the image side surface of the second lens E2, and the third spacer element P3 is disposed against the image side surface of the third lens E3;

[0080] The third lens barrel Pc includes a fifth lens E5 with negative optical power, a fifth spacer P5, a sixth lens E6 with positive or negative optical power, a sixth spacer P6, a seventh lens E7 with negative optical power, and a seventh spacer P7;

[0081] The fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7; and the following conditions are satisfied:

[0082] 7.32≤f234 / EP23≤9.74;

[0083] 2.26≤Δf / |dbs-dbm|≤10.48;

[0084] Among them, f234 is the combined focal length of the second lens E2, the third lens E3 and the fourth lens E4, EP23 is the distance along the optical axis from the image side surface of the second spacing element P2 to the object side surface of the third spacing element P3, Δf is the change in the system effective focal length of the mobile zoom optical system from the first state to the second state, dbs is the inner diameter of the object side surface of the second lens barrel Pb, and dbm is the inner diameter of the image side surface of the second lens barrel Pb.

[0085] It is worth noting that in the mobile zoom optical system provided by this application, under the premise of satisfying the conditional formula 7.32≤f234 / EP23≤9.74, the second group mainly relies on the third lens to bear the main optical focal length, and the thick edge thickness of the third lens easily produces difficult-to-optimize internal reflection stray light problems at the supporting and mating positions of the lenses. Therefore, this application uses the constraint conditional formula 2.26≤Δf / |dbs-dbm|≤10.48 to reasonably control the inner diameters of the object side and image side of the second lens barrel. The outer diameter of the lens in the second lens barrel is also adjusted accordingly, achieving the outward shift of the lens supporting position to a reasonable range, thereby reducing stray light reflected from the second lens barrel to the supporting position, thereby ensuring the quality of the lens imaging.

[0086] It is worth noting that Figure 15 、 Figure 16 and Figure 17 As shown, Figure 15 is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=4.0, Figure 16 is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=1.7, Figure 17 is the stray light diagram when the mobile zoom optical system satisfies f234 / EP23=8.40 and Δf / |dbs-dbm|=11.2. Figure 15 It can be seen that when the mobile zoom optical system satisfies the conditional range of 2.26≤Δf / |dbs-dbm|≤10.48 provided in this application, there is less stray light in the test image and the image quality is higher; Figure 16 As shown in FIG1 , when the zoom optical system moves beyond the lower limit of the conditional expression 2.26≤Δf / |dbs-dbm|≤10.48, it indicates that the inner diameters of the object side and image side of the second lens barrel Pb are significantly different. Accordingly, the outer diameter of one lens is smaller, and light is reflected at the edge structure of the lens, resulting in obvious stray light in the image. Figure 17As shown, when the movement of the zoom optical system exceeds the upper limit of the conditional expression 2.26≤Δf / |dbs-dbm|≤10.48, it indicates that the difference between the inner diameters of the object side surface and the image side surface of the second lens barrel Pb is too small, and the shape of the second lens barrel Pb does not match the actual optical path in the second lens barrel Pb. In other words, the outer diameters of the multiple lenses in the second group are relatively small, and the light is easily reflected at the edge structure of one or more lenses during propagation, resulting in obvious stray light in the picture.

[0087] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 5.38≤dam / ΔT≤5.94; wherein, dam is the inner diameter of the image side of the first lens barrel Pa, and ΔT is the maximum movable distance of the second lens barrel Pb along the optical axis when the mobile zoom optical system changes from the first state to the second state.

[0088] In this way, by reasonably controlling this conditional range, the volume and thickness of the lens module can be reduced, allowing the mobile phone to maintain a light and thin appearance while having a powerful zoom function, which is very important for users who pursue portability and aesthetics.

[0089] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 1.51≤EP56 / CT6≤2.11; wherein, EP56 is the distance between the image side surface of the fifth spacer element P5 and the object side surface of the sixth spacer element P6 along the optical axis, and CT6 is the center thickness of the sixth lens E6 on the optical axis.

[0090] In this way, since the shape of the sixth lens E6 is a structure that is thin in the middle and thick at both sides, by reasonably controlling the range of this conditional expression and constraining the side thickness and center thickness of the sixth lens E6, the processability of the sixth lens E6 can be improved.

[0091] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 7.61≤R14 / CP7≤12.49; wherein R14 is the curvature radius of the image side surface of the seventh lens E7, and CP7 is the maximum thickness of the seventh spacer element P7 along the optical axis.

[0092] Increasing the radius of curvature of the image-side surface of lens E7 effectively reduces the lens's angular width, thereby improving the feasibility of the coating process. However, an excessively large radius of curvature makes it difficult to control surface profile accuracy. The seventh spacer element P7, serving as the retaining ring component of the third lens group, has a dual effect: while increasing the thickness enhances the axial push-off force of the assembled lens, it also significantly increases the overall axial dimensions of the optical system. By optimizing the parameter range of this conditional equation, an optimal balance is achieved among four key technical indicators: coating yield, surface profile accuracy, structural stability, and system compactness.

[0093] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 1.05<CT1 / (D1s-d1s)<1.85; wherein CT1 is the center thickness of the first lens E1 on the optical axis, D1s is the outer diameter of the object side of the first spacer element P1, and d1s is the inner diameter of the object side of the first spacer element P1.

[0094] In this way, by reasonably controlling this conditional range, the light path can be controlled more accurately, ensuring that only light that meets the design requirements can pass through the lens, thereby improving imaging quality.

[0095] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 2.26≤d2s / (R4+R5)≤5.22; wherein d2s is the inner diameter of the object side surface of the second spacer element P2, R4 is the curvature radius of the image side surface of the second lens E2, and R5 is the curvature radius of the object side surface of the third lens E3.

[0096] In this way, by properly controlling the range of this conditional expression, the internal reflected stray light of the second lens E2 can be effectively blocked, and the sensitivity of the second lens E2 and the third lens E3 can be reduced.

[0097] According to some embodiments of the present application, the mobile zoom optical system further satisfies: -1.7<f567 / D6s<-1.4; wherein f567 is the combined focal length of the fifth lens E5, the sixth lens E6 and the seventh lens E7, and D6s is the outer diameter of the object side of the sixth spacer element P6.

[0098] In this way, by properly controlling the range of this conditional expression and constraining the outer diameter of the object side of the sixth spacer element P6 and the combined focal length of the third group, it is possible to optimize the convergence and divergence paths of light, reduce aberrations, and ensure the processability and strength of the lens.

[0099] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 1.05≤f4 / D3m≤1.38; wherein f4 is the effective focal length of the fourth lens E4, and D3m is the outer diameter of the image-side surface of the third spacing element P3.

[0100] Thus, d3m, or the maximum height that light rays in the second lens barrel Pb can reach on the object side of the fourth lens E4, properly controlling this conditional range is beneficial to the overall distribution of the second lens group's optical power and achieves the goal of optimizing lens manufacturability.

[0101] According to some embodiments of the present application, the mobile zoom optical system also satisfies: 4.88≤Lc / (CP6+EP67)≤8.63; wherein, Lc is the maximum height of the third lens barrel Pc, CP6 is the maximum thickness of the sixth spacer element P6 along the optical axis, and EP67 is the distance from the image side surface of the sixth spacer element P6 to the object side surface of the seventh spacer element P7 along the optical axis.

[0102] In this way, by properly controlling the range of this conditional formula, the propagation path of light in the third group can be optimized, the generation of aberrations can be reduced, and the sharpness and contrast of the image can be improved.

[0103] According to some embodiments of the present application, the mobile zoom optical system also satisfies: 0.8<CP1 / (D1m-d1m)<1.6; wherein CP1 is the maximum thickness of the first spacing element P1 along the optical axis, D1m is the outer diameter of the image side surface of the first spacing element P1, and d1m is the inner diameter of the image side surface of the first spacing element P1.

[0104] In this way, CP1 can also be understood as the thickness of the pressure ring of the first group of lenses. The difference between D1m and d1m affects the glue dispensing space of the pressure ring of the first group of lenses. Reasonable control of this conditional range can ensure that the first lens group has stronger push-off force and better reliability performance.

[0105] According to some embodiments of the present application, the mobile zoom optical system further satisfies: -2.89≤f5 / (d5s+d5m)≤-2.08; wherein f5 is the effective focal length of the fifth lens E5, d5s is the inner diameter of the object side surface of the fifth spacer element P5, and d5m is the inner diameter of the image side surface of the fifth spacer element P5.

[0106] In this way, by reasonably controlling the range of this conditional expression and constraining the shape of the fifth spacer element P5, stray light can be effectively reduced and the imaging quality of the lens can be improved.

[0107] According to some embodiments of the present application, the mobile zoom optical system also satisfies: 1.15≤(Das-das) / La≤2.09; wherein Das is the outer diameter of the object side of the first lens barrel Pa, das is the inner diameter of the object side of the first lens barrel Pa, and La is the maximum height of the first lens barrel Pa.

[0108] In this way, by reasonably controlling the range of this conditional expression, under the condition that the optical effective aperture is fixed, the better the thickness uniformity of the first lens barrel Pa, the more stable the reliability of the first group.

[0109] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 1.08≤Lc / (Dcs-dcs)≤1.97; wherein Lc is the maximum height of the third lens barrel Pc, Dcs is the outer diameter of the object side of the third lens barrel Pc, and dcs is the inner diameter of the object side of the third lens barrel Pc.

[0110] By properly controlling the range of this conditional expression and constraining the shape of the third lens barrel Pc, the debugging space for lens and module matching can be increased, while also increasing the reliability of the third group lens.

[0111] According to some embodiments of the present application, the mobile zoom optical system further satisfies: 6.05<(d2m+d3m) / ΔT<6.65; wherein d2m is the inner diameter of the image side surface of the second spacing element P2, d3m is the inner diameter of the image side surface of the third spacing element P3, and ΔT is the maximum movable distance of the second lens barrel Pb along the optical axis when the mobile zoom optical system changes from the first state to the second state.

[0112] In this way, by properly controlling the range of this conditional expression and constraining the shapes of the second spacer element P2 and the third spacer element P3, the light transmitted between the second lens E2 and the third lens E3 propagates along a predetermined optical path, further reducing the problem of stray light within the lens while ensuring lens performance.

[0113] According to another aspect of the present application, the present application further provides a mobile zoom optical system, which includes a first lens barrel Pa, a second lens barrel Pb and a third lens barrel Pc in sequence along the optical axis direction;

[0114] The first lens barrel Pa and the third lens barrel Pc are fixed components, and the second lens barrel Pb is a movable component;

[0115] The first lens barrel Pa contains a first lens E1 with positive refractive power and a first spacer element P1;

[0116] The first spacer element P1 is disposed against the image side surface of the first lens E1;

[0117] The second lens barrel Pb includes a second lens E2 with positive refractive power, a second spacer element P2, a third lens E3 with negative refractive power, a third spacer element P3, and a fourth lens E4 with positive refractive power;

[0118] The second spacer element P2 is disposed against the image side surface of the second lens E2, and the third spacer element P3 is disposed against the image side surface of the third lens E3;

[0119] The third lens barrel Pc includes a fifth lens E5 with negative optical power, a fifth spacer P5, a sixth lens E6 with positive or negative optical power, a sixth spacer P6, a seventh lens E7 with negative optical power, and a seventh spacer P7;

[0120] The fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7; and the following conditions are satisfied:

[0121] 2.26≤d2s / (R4+R5)≤5.22;

[0122] 2.26≤Δf / |dbs-dbm|≤10.48;

[0123] Among them, d2s is the inner diameter of the object side of the second spacer element P2, R4 is the curvature radius of the image side of the second lens E2, R5 is the curvature radius of the object side of the third lens E3, Δf is the change in the system effective focal length of the mobile zoom optical system from the first state to the second state, dbs is the inner diameter of the object side of the second lens barrel Pb, and dbm is the inner diameter of the image side of the second lens barrel Pb.

[0124] It is worth noting that the mobile zoom optical system provided by the present application constrains the shapes of the second spacer element P2, the image-side surface of the second lens E2, and the object-side surface of the third lens E3 by the conditional equation 2.26≤d2s / (R4+R5)≤5.22. This effectively blocks the internal reflected stray light of the second lens E2 and helps reduce the sensitivity of the second and third lenses E2 and E3. However, when the radius of curvature of the object-side surface of the second lens E2 differs significantly from the radius of curvature of the image-side surface of the third lens E3, the edge structure of the lens with the larger radius of curvature is thicker, which makes it easy for stray light to be generated in the second lens barrel Pb. The present application also reasonably controls the inner diameters of the object-side surface and the image-side surface of the second lens barrel Pb by the conditional equation 2.26≤Δf / |dbs-dbm|≤10.48. The outer diameter of the lens in the second lens barrel Pb is also adjusted accordingly, so that the lens support position is moved outward to a reasonable range, thereby reducing stray light reflected from the second lens barrel Pb to the support position, thereby ensuring the quality of lens imaging.

[0125] It should be noted that those skilled in the art will appreciate that, without departing from the technical solutions claimed in this application, the number of spacer elements in the optical lens can be varied to achieve the various results and advantages described herein, and this application does not impose specific limitations thereon. For example, the mobile zoom optical system may include a different number of spacer elements than that described in the above embodiments, as desired.

[0126] Please refer to the attached Figure 1 Some specific but non-restrictive examples of the above-mentioned embodiments of the present application are described in more detail. For the convenience of description, in the following embodiments, OBJ represents the object surface of the optical lens, STO represents the surface of the aperture, S1 represents the object side surface of the first lens E1, S2 represents the image side surface of the first lens E1, S3 represents the object side surface of the first prism PM1, S4 represents the image side surface of the first prism PM1, S5 represents the object side surface of the second lens E2, S6 represents the image side surface of the second lens E2, S7 represents the object side surface of the third lens E3, S8 represents the image side surface of the third lens E3, S9 represents the object side surface of the fourth lens E4, S10 represents the object side surface of the fourth lens E4, S11 represents the image side surface of the fourth lens E4, S12 represents the image side surface of the fifth lens E5, S13 represents the object side surface of the sixth lens E6, S14 represents the image side surface of the sixth lens E6, S15 represents the object side surface of the seventh lens E7, S16 represents the image side surface of the seventh lens E7, S17 represents the object side surface of the second prism PM2, S18 represents the image side surface of the second prism PM2, S19 represents the object side surface of the flat glass E8, S20 represents the image side surface of the flat glass E8, and S21 represents the image plane.

[0127] Example 1

[0128] like Figure 3A and Figure 3B As shown, Figure 3A is a structural diagram of a mobile zoom optical system in a first state according to the first embodiment of the present application. Figure 3B FIG2 is a schematic diagram of the structure of a mobile zoom optical system according to the first embodiment of the present application in a second state. In this embodiment, the mobile zoom optical system includes a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc, sequentially along the optical axis. The first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0129] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0130] In this embodiment:

[0131] The first lens E1 has positive focal power, with the object-side surface S1 and the image-side surface S2 of the first lens E1 being convex; the second lens E2 has positive focal power, with the object-side surface S5 and the image-side surface S6 of the second lens E2 being convex; the third lens E3 has negative focal power, with the object-side surface S7 and the image-side surface S8 of the third lens E3 being convex; the fourth lens E4 has positive focal power, with the object-side surface S9 and the image-side surface S10 of the fourth lens E4 being convex; the fifth lens E5 has negative focal power, with the object-side surface S11 and the image-side surface S12 of the fifth lens E5 being concave; the sixth lens E6 has negative focal power, with the object-side surface S13 and the image-side surface S14 of the sixth lens E6 being concave; and the seventh lens E7 has negative focal power, with the object-side surface S15 and the image-side surface S16 of the seventh lens E7 being convex.

[0132] In addition, Table 1 shows basic optical parameters of the mobile zoom optical system of the first embodiment, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0133] Table 1: Basic optical parameters of the mobile zoom optical system in Example 1

[0134]

[0135] In this embodiment, the object-side surface and the image-side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0136] ;

[0137] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient for the i-th order of the aspheric surface. Tables 2-1 and 2-2 below list the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric surfaces S1, S2, S5, through S16 in Example 1.

[0138] Table 2-1: Aspheric coefficients of the mobile zoom optical system of Example 1

[0139]

[0140] Table 2-2: Aspheric coefficients of the mobile zoom optical system of Example 1

[0141]

[0142] In this embodiment, D1 in Table 1 represents the object distance of the mobile zoom optical system, D2 represents the air gap between the first and second lens groups in the optical system, and D3 represents the air gap between the second and third lens groups in the optical system. The values of D1, D2, and D3 when the mobile zoom optical system is in different states are shown in Table 3.

[0143] Table 3: Some parameters of the mobile zoom optical system in different states in Example 1

[0144]

[0145] Example 2

[0146] like Figure 4A and Figure 4B As shown, Figure 4A and Figure 4B As shown, Figure 4A is a structural diagram of a mobile zoom optical system in a first state according to the first embodiment of the present application. Figure 4B FIG2 is a schematic diagram of the structure of a mobile zoom optical system according to the first embodiment of the present application in a second state. In this embodiment, the mobile zoom optical system includes a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc, sequentially along the optical axis. The first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0147] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0148] It is noteworthy that compared to the aforementioned first embodiment, the optical lens of this second embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of this second embodiment is the same as Table 1, the aspheric coefficient table is the same as Table 2-1 and Table 2-2, and the table of some parameters of the mobile zoom optical system in the first and second states is the same as Table 3. However, the optical lens of this second embodiment has a different black object structure than the optical lens of the aforementioned first embodiment. Specifically, the difference between this second embodiment and the aforementioned first embodiment lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of this second embodiment and the aforementioned first embodiment are shown in Table 11 below.

[0149] Example 3

[0150] like Figure 5A and Figure 5B As shown, Figure 5A is a structural diagram of a mobile zoom optical system in a first state according to the third embodiment of the present application. Figure 5B 2 is a schematic diagram of the structure of a mobile zoom optical system according to the third embodiment of the present application in the second state. In this embodiment, the mobile zoom optical system includes a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc, sequentially along the optical axis. The first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0151] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0152] It is noteworthy that compared to the aforementioned first embodiment, the optical lens of this third embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of this third embodiment is the same as Table 1, the aspheric coefficient table is the same as Tables 2-1 and 2-2, and the partial parameter tables of the mobile zoom optical system in the first and second states are the same as Table 3. However, the optical lens of this third embodiment has a different black object structure than the optical lens of the aforementioned first embodiment. Specifically, the difference between this third embodiment and the aforementioned first embodiment lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of this third embodiment and the aforementioned first embodiment are shown in Table 11 below.

[0153] The axial chromatic aberration curves of the mobile zoom optical system in the first, second and third embodiments are as follows: Figure 6A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical system; the astigmatism curves of the mobile zoom optical system in Example 1, Example 2 and Example 3 are shown as Figure 6B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the mobile zoom optical system in Example 1, Example 2 and Example 3 are as shown Figure 6C As shown, it represents the relative deviation between the actual image and the ideal image; the magnification chromatic aberration curves of the mobile zoom optical system in Example 1, Example 2 and Example 3 are shown as Figure 6D As shown in , it represents the difference in imaging height at different wavelengths. 6A to 6D It can be seen that the optical lenses in the first embodiment, the second embodiment and the third embodiment can all achieve good imaging quality.

[0154] Example 4

[0155] like Figure 7A and Figure 7B As shown, Figure 7A is a structural diagram of a mobile zoom optical system in a first state according to a fourth embodiment of the present application. Figure 7B 2 is a schematic diagram of the structure of a mobile zoom optical system according to a fourth embodiment of the present application in a second state. In this embodiment, the mobile zoom optical system includes, in order along the optical axis, a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc; wherein the first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0156] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0157] In this embodiment,

[0158] The first lens E1 has positive refractive power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex.

[0159] The second lens E2 has positive refractive power, and the object-side surface S5 and the image-side surface S6 of the second lens E2 are convex.

[0160] The third lens E3 has negative refractive power, and the object-side surface S7 of the third lens E3 is convex, and the image-side surface S8 is concave;

[0161] The fourth lens element E4 has positive refractive power, and its object-side surface S9 and image-side surface S10 are convex.

[0162] The fifth lens element E5 has negative refractive power. The object-side surface S11 of the fifth lens element E5 is concave, and the image-side surface S12 is convex.

[0163] The sixth lens E6 has positive refractive power, and the object-side surface S13 of the sixth lens E6 is concave, and the image-side surface S14 is convex;

[0164] The seventh lens element E7 has negative refractive power. The object-side surface S15 of the seventh lens element E7 is convex, and the image-side surface S16 is concave.

[0165] In addition, Table 4 shows the basic optical parameters of the mobile zoom optical system of Example 4, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0166] Table 4: Basic optical parameters of the mobile zoom optical system in Example 4

[0167]

[0168] In this embodiment, the object-side surface and the image-side surface of any lens from the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by the aspherical surface formula in the first embodiment:

[0169] The following Tables 5-1 and 5-2 give the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1, S2, S5 to S16 in Example 4.

[0170] Table 5-1: Aspheric coefficients of the mobile zoom optical system in Example 4

[0171]

[0172] Table 5-2: Aspheric coefficients of the mobile zoom optical system in Example 4

[0173]

[0174] In this embodiment, D1 in Table 4 represents the object distance of the mobile zoom optical system, D2 represents the air gap between the first and second lens groups in the optical system, and D3 represents the air gap between the second and third lens groups in the optical system. The values of D1, D2, and D3 when the mobile zoom optical system is in different states are shown in Table 6.

[0175] Table 6: Some parameters of the mobile zoom optical system in different states in Example 4

[0176]

[0177] Example 5

[0178] like Figure 8A and Figure 8B As shown, Figure 8A is a structural diagram of a mobile zoom optical system in a first state according to a fifth embodiment of the present application. Figure 8B 2 is a schematic diagram of the structure of a mobile zoom optical system according to the fifth embodiment of the present application in the second state. In this embodiment, the mobile zoom optical system includes a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc, sequentially along the optical axis. The first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0179] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0180] It is noteworthy that compared to the aforementioned fourth embodiment, the optical lens of this fifth embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of this fifth embodiment is the same as Table 4, the aspheric coefficient table is the same as Table 5-1 and Table 5-2, and the partial parameter tables of the mobile zoom optical system in the first and second states are the same as Table 6. However, the optical lens of this fifth embodiment has a different black object structure than the optical lens of the aforementioned fourth embodiment. Specifically, the difference between this fifth embodiment and the aforementioned fourth embodiment lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of this fifth embodiment and the aforementioned fourth embodiment are shown in Table 11 below.

[0181] Example 6

[0182] like Figure 9A and Figure 9B As shown, Figure 9A is a structural diagram of a mobile zoom optical system in a first state according to a sixth embodiment of the present application. Figure 9B 2 is a schematic diagram of the structure of a mobile zoom optical system according to Example 6 of the present application in a second state. In this embodiment, the mobile zoom optical system includes a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc, sequentially along the optical axis. The first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0183] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0184] It is noteworthy that compared to the aforementioned fourth embodiment, the optical lens of this sixth embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of this sixth embodiment is the same as Table 4, the aspheric coefficient table is the same as Tables 5-1 and 5-2, and the partial parameter tables of the mobile zoom optical system in the first and second states are the same as Table 6. However, the optical lens of this sixth embodiment has a different black object structure than the optical lens of the fourth embodiment. Specifically, the difference between this sixth embodiment and the fourth embodiment lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of this sixth embodiment and the fourth embodiment are shown in Table 11 below.

[0185] The axial chromatic aberration curves of the mobile zoom optical system in the fourth, fifth and sixth embodiments are as follows: Figure 10A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical system; the astigmatism curves of the mobile zoom optical system in the fourth embodiment, the fifth embodiment and the sixth embodiment are shown in FIG. Figure 10B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the mobile zoom optical system in the fourth embodiment, the fifth embodiment and the sixth embodiment are shown as Figure 10C As shown, it represents the relative deviation between the actual image and the ideal image; the magnification chromatic aberration curves of the mobile zoom optical system in the fourth embodiment, the fifth embodiment and the sixth embodiment are shown in FIG. Figure 10D As shown in , it represents the difference in imaging height at different wavelengths. 10A to 10D It can be seen that the optical lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0186] Example 7

[0187] like Figure 11A and Figure 11B As shown, Figure 11A 2 is a schematic structural diagram of a mobile zoom optical system in a first state according to a seventh embodiment of the present application. Figure 11B FIG2 is a schematic diagram of the structure of a mobile zoom optical system according to a seventh embodiment of the present application in a second state. In this embodiment, the mobile zoom optical system includes, in order along the optical axis, a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc; wherein the first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0188] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0189] In this embodiment:

[0190] The first lens E1 has positive focal power, with the object-side surface S1 and the image-side surface S2 of the first lens E1 being convex; the second lens E2 has positive focal power, with the object-side surface S5 and the image-side surface S6 of the second lens E2 being convex; the third lens E3 has negative focal power, with the object-side surface S7 and the image-side surface S8 of the third lens E3 being convex; the fourth lens E4 has positive focal power, with the object-side surface S9 and the image-side surface S10 of the fourth lens E4 being convex; the fifth lens E5 has negative focal power, with the object-side surface S11 and the image-side surface S12 of the fifth lens E5 being concave; the sixth lens E6 has negative focal power, with the object-side surface S13 and the image-side surface S14 of the sixth lens E6 being concave; and the seventh lens E7 has negative focal power, with the object-side surface S15 and the image-side surface S16 of the seventh lens E7 being convex.

[0191] In addition, Table 7 shows the basic optical parameters of the mobile zoom optical system of Example 7, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0192] Table 7: Basic optical parameters of the mobile zoom optical system of Example 7

[0193]

[0194] In this embodiment, the object-side surface and the image-side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape x of each aspherical lens is defined by the aspherical surface formula in the first embodiment.

[0195] The following Tables 8-1 and 8-2 give the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1, S2, S5 to S16 in Example 7.

[0196] Table 8-1: Aspheric coefficients of the mobile zoom optical system of Example 7

[0197]

[0198] Table 8-2: Aspheric coefficients of the mobile zoom optical system of Example 7

[0199]

[0200] In this embodiment, D1 in Table 7 represents the object distance of the mobile zoom optical system, D2 represents the air gap between the first and second lens groups in the optical system, and D3 represents the air gap between the second and third lens groups in the optical system. The values of D1, D2, and D3 when the mobile zoom optical system is in different states are shown in Table 9.

[0201] Table 9: Partial parameters of the mobile zoom optical system in different states in Example 7

[0202]

[0203] Example 8

[0204] like Figure 12A and Figure 12B As shown, Figure 12A 2 is a schematic structural diagram of a mobile zoom optical system in a first state according to an eighth embodiment of the present application. Figure 12B 2 is a schematic diagram of the structure of a mobile zoom optical system according to Example 8 of the present application in a second state. In this embodiment, the mobile zoom optical system includes, in order along the optical axis, a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc; wherein the first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0205] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0206] It is noteworthy that compared to the seventh embodiment, the optical lens of the eighth embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of the eighth embodiment is the same as Table 7, the aspheric coefficient table is the same as Table 8-1 and Table 8-2, and the partial parameter tables of the mobile zoom optical system in the first and second states are the same as Table 9. However, the optical lens of the eighth embodiment has a different black object structure than the optical lens of the seventh embodiment. Specifically, the eighth embodiment differs from the seventh embodiment in the dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of the eighth embodiment and the seventh embodiment are shown in Table 11 below.

[0207] Embodiment 9

[0208] like Figure 13A and Figure 13B As shown, Figure 13A is a schematic structural diagram of a mobile zoom optical system in a first state according to a ninth embodiment of the present application. Figure 13B FIG2 is a schematic diagram of the structure of a mobile zoom optical system according to a ninth embodiment of the present application in a second state. In this embodiment, the mobile zoom optical system includes, in order along the optical axis, a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc; wherein the first lens barrel Pa contains a first lens E1 and a first spacer P1; the second lens barrel Pb contains a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, and a fourth lens E4; and the third lens barrel Pc contains a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a seventh lens E7, and a seventh spacer P7.

[0209] In this embodiment, the first spacer P1 is disposed against the image-side surface of the first lens E1, the second spacer P2 is disposed against the image-side surface of the second lens E2, the third spacer P3 is disposed against the image-side surface of the third lens E3, the fifth spacer P5 is disposed against the image-side surface of the fifth lens E5, the sixth spacer P6 is disposed against the image-side surface of the sixth lens E6, and the seventh spacer P7 is disposed against the image-side surface of the seventh lens E7.

[0210] It is noteworthy that compared to the seventh embodiment, the optical lens of the ninth embodiment has the same white object structure. Specifically, the basic optical parameter table of the optical lens of the ninth embodiment is the same as Table 7, the aspheric coefficient table is the same as Tables 8-1 and 8-2, and the partial parameter tables of the mobile zoom optical system in the first and second states are the same as Table 9. However, the optical lens of the ninth embodiment has a different black object structure than the optical lens of the seventh embodiment. Specifically, the difference between the ninth embodiment and the seventh embodiment lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical lens. Specifically, the values of the relevant structural parameters of the ninth embodiment and the seventh embodiment are shown in Table 11 below.

[0211] The axial chromatic aberration curves of the mobile zoom optical system in the seventh, eighth and ninth embodiments are as follows: Figure 14A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical system; the astigmatism curves of the mobile zoom optical system in Example 7, Example 8 and Example 9 are shown as Figure 14B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the mobile zoom optical system in the seventh embodiment, the eighth embodiment and the ninth embodiment are shown as follows Figure 14C As shown, it represents the relative deviation between the actual image and the ideal image; the magnification chromatic aberration curves of the mobile zoom optical system in Example 7, Example 8 and Example 9 are shown as Figure 14D As shown in , it represents the difference in imaging height at different wavelengths. 14A to 14D It can be seen that the optical lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment can all achieve good imaging quality.

[0212] In summary, in Examples 1 to 9, the effective focal lengths f1 to f7 of the first lens E1 to the seventh lens E7 in the mobile zoom optical system, the effective focal length f of the optical lens, the combined focal length f234 of the second lens group, the combined focal length f567 of the third lens group, the change Δf in the effective focal length of the system when the mobile zoom optical system changes from the first state to the second state, and the maximum movable distance ΔT of the second lens barrel Pb along the optical axis when the mobile zoom optical system changes from the first state to the second state are respectively shown in Table 10 below.

[0213] Table 10: Optical parameters of mobile zoom optical system

[0214]

[0215] In addition, the black object structural parameters of the mobile zoom optical system in Examples 1 to 9 are summarized as follows:

[0216] d1s is the inner diameter of the object side of the first spacer element P1, d1m is the inner diameter of the image side of the first spacer element P1, D1s is the outer diameter of the object side of the first spacer element P1, D1m is the outer diameter of the image side of the first spacer element P1, d2s is the inner diameter of the object side of the second spacer element P2, d2m is the inner diameter of the image side of the second spacer element P2, d3m is the inner diameter of the image side of the third spacer element P3, D3m is the outer diameter of the image side of the third spacer element P3, d5s is the inner diameter of the object side of the fifth spacer element P5, d5m is the inner diameter of the image side of the fifth spacer element P5, D6s is the outer diameter of the object side of the sixth spacer element P6, das is the inner diameter of the object side of the first lens barrel Pa, dam is the inner diameter of the image side of the first lens barrel Pa, Das is the outer diameter of the object side of the first lens barrel Pa, dbs is the object side of the second lens barrel Pb Table 11 is the maximum diameter of the image side of the first lens element P1, EP23 is the distance from the image side of the second lens element P2 to the object side of the third lens element P3; EP56 is the distance from the image side of the fifth lens element P5 to the object side of the sixth lens element P6; CP6 is the maximum thickness of the sixth lens element P6 along the optical axis; EP67 is the distance from the image side of the sixth lens element P6 to the object side of the seventh lens element P7 along the optical axis; CP7 is the maximum thickness of the seventh lens element P7 along the optical axis. The specific values are shown in Table 11.

[0217] Table 11: Black object structure parameters of mobile zoom optical system

[0218]

[0219] In summary, the mobile zoom optical systems in Examples 1 to 9 satisfy the relationship shown in Table 12, as shown in Table 12.

[0220] Table 12: Relationships satisfied by mobile zoom optical systems

[0221]

[0222] It is worth mentioning that, according to one aspect of the present application, one embodiment of the present application further provides a camera module, which may include the above-mentioned mobile zoom optical system and a photosensitive element, wherein the photosensitive element is arranged on the image side of the mobile zoom optical system for imaging. It is understood that the photosensitive element mentioned in the present application may be implemented as, but not limited to, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and this application will not elaborate on this.

[0223] In addition, according to another aspect of the present application, one embodiment of the present application further provides an electronic device, which may include the above-mentioned camera module and a processor, wherein the camera module is communicatively connected to the processor to acquire image data and input the image data into the processor for processing. It is understood that the electronic device mentioned in this application can be implemented as, but not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate on this.

[0224] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0225] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A mobile zoom optical system, characterized in that: The lens comprises a first lens barrel, a second lens barrel and a third lens barrel in sequence along the optical axis direction; The first lens barrel and the third lens barrel are fixed components, and the second lens barrel is a movable component; The first lens barrel contains a first lens with positive optical power and a first spacer element; The first spacer element is disposed against the image side surface of the first lens; The second lens barrel includes a second lens with positive optical power, a second spacing element, a third lens with negative optical power, a third spacing element, and a fourth lens with positive optical power; The second spacer element is disposed against the image side surface of the second lens, and the third spacer element is disposed against the image side surface of the third lens; The third lens barrel comprises a fifth lens with negative optical power, a fifth spacer, a sixth lens with positive or negative optical power, a sixth spacer, a seventh lens with negative optical power, and a seventh spacer; The fifth spacer is disposed against the image side surface of the fifth lens, the sixth spacer is disposed against the image side surface of the sixth lens, and the seventh spacer is disposed against the image side surface of the seventh lens; and the following conditions are satisfied: 7.32≤f234 / EP23≤9.74; 2.26≤Δf / |dbs-dbm|≤10.48; Among them, f234 is the combined focal length of the second lens, the third lens and the fourth lens, EP23 is the distance along the optical axis from the image side surface of the second spacer element to the object side surface of the third spacer element, Δf is the change in the system effective focal length of the mobile zoom optical system from the first state to the second state, dbs is the inner diameter of the object side surface of the second lens barrel, and dbm is the inner diameter of the image side surface of the second lens barrel.

2. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 5.38≤dam / ΔT≤5.94; Wherein, dam is the inner diameter of the image side of the first lens barrel, and ΔT is the maximum movable distance of the second lens barrel along the optical axis when the mobile zoom optical system changes from the first state to the second state.

3. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 1.51≤EP56 / CT6≤2.11; Wherein, EP56 is the distance from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

4. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 7.61≤R14 / CP7≤12.49; Wherein, R14 is the curvature radius of the image side surface of the seventh lens, and CP7 is the maximum thickness of the seventh spacer element along the optical axis.

5. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 1.05<CT1 / (D1s-d1s)<1.85; Wherein, CT1 is the center thickness of the first lens on the optical axis, D1s is the outer diameter of the side surface of the first spacer element, and d1s is the inner diameter of the side surface of the first spacer element.

6. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 2.26≤d2s / (R4+R5)≤5.22; Wherein, d2s is the inner diameter of the object side of the second spacer element, R4 is the curvature radius of the image side of the second lens, and R5 is the curvature radius of the object side of the third lens.

7. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: -1.7<f567 / D6s<-1.4; Wherein, f567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, and D6s is the outer diameter of the side surface of the sixth spacer element.

8. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 1.05≤f4 / D3m≤1.38; Wherein, f4 is the effective focal length of the fourth lens, and D3m is the outer diameter of the image-side surface of the third spacing element.

9. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 4.88≤Lc / (CP6+EP67)≤8.63; Wherein, Lc is the maximum height of the third lens barrel, CP6 is the maximum thickness of the sixth spacer element along the optical axis, and EP67 is the distance from the image side surface of the sixth spacer element to the object side surface of the seventh spacer element along the optical axis.

10. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 0.8<CP1 / (D1m-d1m)<1.6; Wherein, CP1 is the maximum thickness of the first spacer element along the optical axis direction, D1m is the outer diameter of the image side surface of the first spacer element, and d1m is the inner diameter of the image side surface of the first spacer element.

11. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: -2.89≤f5 / (d5s+d5m)≤-2.08; Wherein, f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side of the fifth spacer element, and d5m is the inner diameter of the image side of the fifth spacer element.

12. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 1.15≤(Das-das) / La≤2.09; Wherein, Das is the outer diameter of the object side of the first lens barrel, das is the inner diameter of the object side of the first lens barrel, and La is the maximum height of the first lens barrel.

13. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 1.08≤Lc / (Dcs-dcs)≤1.97; Wherein, Lc is the maximum height of the third lens barrel, Dcs is the outer diameter of the object side of the third lens barrel, and dcs is the inner diameter of the object side of the third lens barrel.

14. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 6.05<(d2m+d3m) / ΔT<6.65; Among them, d2m is the inner diameter of the image side of the second spacer element, d3m is the inner diameter of the image side of the third spacer element, and ΔT is the maximum movable distance of the second lens barrel along the optical axis when the mobile zoom optical system changes from the first state to the second state.

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