Moving 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 / Lb is larger than or equal to 3.31 and smaller than or equal to 3.85. And delta T / dbs-dbm is more than 1.0 and less than 4.6.

Description

Technical Field

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

[0002] With the increasing popularity of smartphones, users are demanding more advanced camera features. They are no longer satisfied with simple photo capture but are looking for more professional, higher-quality images. The introduction of optical zoom technology in mobile phones has historically faced multiple physical and engineering challenges. Space constraints are primary, as the trend toward thinner and lighter phones conflicts with the multiple lens arrays and drive structures required for optical zoom. Image quality also suffers from significant shortcomings: insufficient light in low-light scenes and loss of detail due to sensor cropping, resulting in high-zoom photos with excessive noise and poor dynamic range.

[0003] To achieve high-resolution imaging within a limited footprint, current smartphone zoom lens systems face the technical challenge of significantly thinning the edge thickness of lens elements. This structural feature not only creates a potential risk of structural integrity loss at the edge of the optical element, but also leads to poor assembly stability of the lens array, resulting in a decrease in the yield rate of optical modules in mass production. Summary of the Invention

[0004] One advantage of the present application is that it provides a mobile zoom optical system that can alleviate the spatial contradiction between the lightweight and thinning of mobile phones and multiple lens groups, reduce high-resolution imaging requirements and the potential risk of thinning and breakage at the edges of the lenses during the lightweight process.

[0005] According to one aspect of the present application, a mobile zoom optical system provided by the present application includes a first lens barrel, a second lens barrel, and a third lens barrel in sequence along the optical axis direction, wherein the first lens barrel and the third lens barrel are fixed components, and the second lens barrel is a movable component;

[0006] The first lens barrel contains a first lens with positive optical power and a first spacer element;

[0007] The first spacer element is disposed against the image side surface of the first lens;

[0008] 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;

[0009] 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;

[0010] 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;

[0011] 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;

[0012] The mobile zoom optical system also satisfies the following: 3.31≤f234 / Lb≤3.85; 1.0<ΔT / |dbs-dbm|<4.6; wherein, f234 is the combined focal length of the second lens, the third lens and the fourth lens, Lb is the maximum height of the second lens barrel, ΔT is the maximum movable distance of the second lens barrel along the optical axis when the optical system changes from the first state to the second state, dbs is the inner diameter of the object side of the second lens barrel, and dbm is the inner diameter of the image side of the second lens barrel.

[0013] In some embodiments, the mobile zoom optical system further satisfies: 2.80≤La / CP1≤3.63;

[0014] Wherein, La is the maximum height of the first lens barrel, and CP1 is the maximum thickness of the first spacer element along the optical axis.

[0015] In some embodiments, the mobile zoom optical system further satisfies: 1.35<f1 / (d1s+d1m)<1.70;

[0016] Wherein, f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacer element, and d1m is the inner diameter of the image side of the first spacer element.

[0017] In some embodiments, the mobile zoom optical system further satisfies: 1.10≤(Das-das) / CT1≤2.72;

[0018] 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 CT1 is the center thickness of the first lens on the optical axis.

[0019] In some embodiments, the mobile zoom optical system further satisfies: 1.59≤(EP23+CP3) / T34≤2.25;

[0020] Among them, EP23 is the distance from the image side of the second spacer element to the object side of the third spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

[0021] In some embodiments, the mobile zoom optical system further satisfies: 0.94≤d2s / (f2+f3)≤4.04;

[0022] Wherein, d2s is the inner diameter of the side surface of the second spacer element, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.

[0023] In some embodiments, the mobile zoom optical system further satisfies: -9.76≤f567 / (EP56+EP67)≤-7.04;

[0024] Among them, f567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, 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 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.

[0025] In some embodiments, the mobile zoom optical system further satisfies: -15.47≤f7 / Lc≤-6.24;

[0026] Wherein, f7 is the effective focal length of the seventh lens, and Lc is the maximum height of the third lens barrel.

[0027] In some embodiments, the mobile zoom optical system further satisfies: 3.38≤(D2s+D3s) / Δf≤4.30;

[0028] Wherein, D2s is the outer diameter of the side surface of the second spacer element, D3s is the outer diameter of the side surface of the third spacer element, and Δf is the change in the effective focal length of the mobile zoom optical system from the first state to the second state.

[0029] In some embodiments, the mobile zoom optical system further satisfies: 1.1<CT7 / (CP6+CP7)<2.2;

[0030] Wherein, CT7 is the center thickness of the seventh lens on the optical axis, CP6 is the maximum thickness of the sixth spacing element along the optical axis, and CP7 is the maximum thickness of the seventh spacing element along the optical axis.

[0031] In some embodiments, the mobile zoom optical system further satisfies: 4.45<d5s / (CT5+CT6)<5.7;

[0032] Wherein, d5s is the inner diameter of the side surface of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0033] In some embodiments, the mobile zoom optical system further satisfies: 1.7<(d6m+D6m) / R13<3.25;

[0034] Wherein, d6m is the inner diameter of the image side surface of the sixth spacer element, D6m is the outer diameter of the image side surface of the sixth spacer element, and R13 is the curvature radius of the object side surface of the seventh lens.

[0035] In some embodiments, the mobile zoom optical system further satisfies: 0.11≤(Dbm-dbm) / (Dcs-dcs)≤1.41;

[0036] Among them, Dbm is the outer diameter of the image side of the second lens barrel, dbm is the inner diameter of the image side of the second 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.

[0037] In some embodiments, the mobile zoom optical system further satisfies: 2.65<dam / Lb<3.10;

[0038] Wherein, dam is the inner diameter of the image side of the first lens barrel, and Lb is the maximum height of the second lens barrel.

[0039] In summary, the mobile zoom optical system provided by this application, under the premise of satisfying the conditional equation 3.31 ≤ f234 / Lb ≤ 3.85, suffers from excessively thin lens edges within the relatively compact space of the second lens barrel, impacting the stability of the lens assembly. Therefore, this application utilizes the constraint equation 1.0 < ΔT / |dbs-dbm| < 4.6 to rationally control the thickness of the lens edge structure, thereby ensuring reasonable dimensions and structural strength. This allows the second lens group to maintain good structural stability during assembly and reliability verification, thereby improving the overall assembly stability of the optical imaging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of structural parameters of a mobile zoom optical system according to one embodiment of the present application;

[0041] Figure 2 Based on Figure 1 A schematic diagram of some size parameters of the mobile zoom optical system shown;

[0042] 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;

[0043] 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;

[0044] 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;

[0045] 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;

[0046] 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;

[0047] 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;

[0048] 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;

[0049] 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;

[0050] 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;

[0051] 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;

[0052] 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;

[0053] 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;

[0054] 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;

[0055] 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;

[0056] 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;

[0057] 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;

[0058] 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;

[0059] 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;

[0060] 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;

[0061] 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;

[0062] 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;

[0063] 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;

[0064] 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;

[0065] 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;

[0066] 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;

[0067] 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;

[0068] 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;

[0069] 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;

[0070] 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;

[0071] 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;

[0072] Figure 15 shows a stress diagram when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=4.0;

[0073] Figure 16 shows a stress diagram when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=0.7;

[0074] Figure 17 A stress diagram is shown when the zoom optical system is moved to satisfy ΔT / |dbs-dbm|=5.1.

[0075] Reference numerals:

[0076] 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

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] See also Figure 1 and Figure 2 , Figure 1Schematic diagram of structural parameters of a mobile zoom optical system according to one embodiment of the present application. Figure 2 Based on Figure 1 Schematic diagram of some size parameters of the mobile zoom optical system shown. According to one aspect of the present application, 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;

[0085] The first lens barrel Pa and the third lens barrel Pc are fixed components, and the second lens barrel Pb is a movable component;

[0086] The first lens barrel Pa contains a first lens E1 with positive refractive power and a first spacer element P1;

[0087] The first spacer element P1 is disposed against the image side surface of the first lens E1;

[0088] 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;

[0089] The second spacing element P2 is disposed against the image side surface of the second lens E2, and the third spacing element P3 is disposed against the image side surface of the third lens E3;

[0090] 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;

[0091] 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;

[0092] The mobile zoom optical system also satisfies the following: 3.31≤f234 / Lb≤3.85; 1.0<ΔT / |dbs-dbm|<4.6; wherein, f234 is the combined focal length of the second lens E2, the third lens E3 and the fourth lens E4, Lb is the maximum height of the second lens barrel Pb, ΔT is the maximum movable distance of the second lens barrel Pb along the optical axis when the optical system changes 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.

[0093] In summary, the mobile zoom optical system provided by this application, under the premise of satisfying the conditional equation 3.31 ≤ f234 / Lb ≤ 3.85, suffers from excessively thin lens edges within the relatively compact space of the second lens barrel, impacting the stability of the lens assembly. Therefore, this application utilizes the constraint equation 1.0 < ΔT / |dbs-dbm| < 4.6 to rationally control the thickness of the lens edge structure, thereby ensuring reasonable dimensions and structural strength. This allows the second lens group to maintain good structural stability during assembly and reliability verification, thereby improving the overall assembly stability of the optical imaging device.

[0094] It is worth noting that see Figure 15 、 Figure 16 、 Figure 17 , the mobile zoom optical systems shown in the three figures all satisfy 3.31≤f234 / Lb≤3.85, where, Figure 15 shows the stress diagram when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=4.0, Figure 16 shows the stress diagram when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=0.7, Figure 17 The stress diagram when the zoom optical system satisfies ΔT / |dbs-dbm|=5.1 is shown. Figure 15 It can be seen that when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=4.0, the maximum stress of the lenses in the second group is 5.12MPa, and the stress is mainly distributed at the spacer element, that is, the maximum stress is borne by the spacer element. Figure 16 It can be seen that when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=0.7, the maximum stress of the lenses in the second group is 14.87MPa, and the stress distribution range extends from the spacer element to the inner part of the lens edge structure nearby. In other words, the lens edge structure needs to withstand greater pressure during the assembly process. Figure 17 It can be seen that when the mobile zoom optical system satisfies ΔT / |dbs-dbm|=5.1, the maximum stress of the lenses in the second group is 9.56MPa. In particular, at the edge structure of the second lens E2, the stress distribution range intrudes from the spacers on both sides to the lens in the middle. In other words, the edge structure of the second lens E2 is subjected to greater pressure during the assembly process, posing a greater risk of breakage. By comparison Figure 15 、 Figure 16 and Figure 17 It can be seen that under the constraint of the condition 1.0<ΔT / |dbs-dbm|<4.6, the edge thickness of the lenses in the second group of the mobile zoom optical system is reasonably controlled, the stress borne by the lenses is relatively small, and the overall assembly stability of the mobile zoom optical system is ensured.

[0095] According to some embodiments of the present application, the mobile zoom optical system satisfies: 2.80≤La / CP1≤3.63; wherein La is the maximum height of the first lens barrel Pa, and CP1 is the maximum thickness of the first spacing element P1 along the optical axis.

[0096] In this way, the present application can make the internal structure of the first lens barrel Pa more compact by reasonably controlling the ratio between the maximum height of the first lens barrel Pa and the maximum thickness of the first spacing element P1 along the optical axis, reduce unnecessary space waste, and make the lens as a whole more compact and lightweight, while also being beneficial to the reasonable layout and assembly of other components inside the lens.

[0097] According to some embodiments of the present application, the mobile zoom optical system satisfies: 1.35<f1 / (d1s+d1m)<1.70; wherein f1 is the effective focal length of the first lens E1, d1s is the inner diameter of the object side of the first spacer element P1, and d1m is the inner diameter of the image side of the first spacer element P1.

[0098] In this way, the present application can ensure that the lens can obtain an appropriate amount of light input under different focal lengths and shooting conditions by reasonably controlling the effective focal length of the first lens E1, the inner diameter of the object side of the first spacer element P1, and the inner diameter of the image side of the first spacer element P1, thereby avoiding overexposure or underexposure, improving the exposure accuracy of the photo, and making the brightness and contrast of the image more balanced.

[0099] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system also satisfies: 1.10≤(Das-das) / CT1≤2.72; 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 CT1 is the center thickness of the first lens E1 on the optical axis.

[0100] In this way, since the ratio of the difference between the middle thickness of the first lens element and the diameter of the lens barrel affects the overall size of the lens, a suitable ratio can minimize the volume and weight of the lens while ensuring optical performance.

[0101] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system further satisfies: 1.59≤(EP23+CP3) / T34≤2.25; wherein EP23 is the distance from the image side surface of the second spacer element P2 to the object side surface of the third spacer element P3 along the optical axis, CP3 is the maximum thickness of the third spacer element P3 along the optical axis, and T34 is the air spacing between the third lens E3 and the fourth lens E4 on the optical axis.

[0102] Properly controlling this conditional range helps to properly control the light path between lens elements, effectively correcting aberrations such as astigmatism and coma. It also optimizes the focusing performance of light at the edges and center of the lens, reducing image edge blur caused by astigmatism and smearing caused by coma, thereby improving image quality.

[0103] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system also satisfies: 0.94≤d2s / (f2+f3)≤4.04; wherein d2s is the inner diameter of the object side of the second spacer element P2, f2 is the effective focal length of the second lens E2, and f3 is the effective focal length of the third lens E3.

[0104] In this way, by reasonably controlling the range of this conditional formula, we can better control the convergence of light of different wavelengths after passing through the lens group, reduce color blur and color fringing caused by chromatic aberration, and make the image color more accurate and clear.

[0105] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system also satisfies: -9.76≤f567 / (EP56+EP67)≤-7.04; wherein f567 is the combined focal length of the fifth lens E5, the sixth lens E6 and the seventh lens E7, EP56 is the distance from the image side surface of the fifth spacer element P5 to the object side surface 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.

[0106] In this way, reasonable control of this conditional range can ensure that light diverges reasonably between the lens groups, reducing astigmatism and coma caused by excessive divergence or convergence of light, thereby improving the clarity and sharpness of the image, especially at the edge of the picture.

[0107] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system also satisfies: -15.47≤f7 / Lc≤-6.24; wherein f7 is the effective focal length of the seventh lens E7, and Lc is the maximum height of the third lens barrel Pc.

[0108] In this way, by properly controlling the range of this conditional formula, the third lens group in the zoom system can effectively diverge the light without disrupting the balance of the entire optical system due to excessively weak optical focal length.

[0109] According to some embodiments of the present application, the mobile zoom optical system satisfies the following: 3.38≤(D2s+D3s) / Δf≤4.30; wherein D2s is the outer diameter of the object side of the second spacing element P2, D3s is the outer diameter of the object side of the third spacing element P3, and Δf is the change in the system effective focal length of the mobile zoom optical system from the first state to the second state.

[0110] In this way, reasonable control of this conditional range can ensure that during the zoom process, the lens can accurately control the path of light, reduce the generation of these aberrations, and thus improve the contrast and clarity of the image.

[0111] According to some embodiments of the present application, the mobile zoom optical system satisfies the following: 1.1<CT7 / (CP6+CP7)<2.2; wherein CT7 is the center thickness of the seventh lens E7 on the optical axis, CP6 is the maximum thickness of the sixth spacing element P6 along the optical axis, and CP7 is the maximum thickness of the seventh spacing element P7 along the optical axis.

[0112] In this way, the range of this conditional expression is reasonably controlled. A ratio exceeding the lower limit will lead to insufficient lens strength, causing problems such as astigmatism and Astigmatism, affecting lens performance; a ratio exceeding the upper limit will cause the red arc-shaped stray light on the seventh lens E7 to become stronger, and stray light optimization will be difficult.

[0113] According to some embodiments of the present application, the mobile zoom optical system satisfies: the mobile zoom optical system further satisfies: 4.45<d5s / (CT5+CT6)<5.7; wherein d5s is the inner diameter of the object side of the fifth spacer element P5, CT5 is the center thickness of the fifth lens E5 on the optical axis, and CT6 is the center thickness of the sixth lens E6 on the optical axis.

[0114] In this way, if the range of this conditional formula is reasonably controlled, the ratio exceeding the lower limit will cause stray light problems, and the ratio exceeding the upper limit will cause a sharp drop in the relative illumination of the lens, both of which will affect the use of the lens.

[0115] According to some embodiments of the present application, the mobile zoom optical system satisfies: 1.7<(d6m+D6m) / R13<3.25; wherein d6m is the inner diameter of the image side surface of the sixth spacer element P6, D6m is the outer diameter of the image side surface of the sixth spacer element P6, and R13 is the curvature radius of the object side surface of the seventh lens E7.

[0116] In this way, by reasonably controlling the range of this conditional formula, it is possible to ensure the stable propagation of the light beam between the spacer and the lens, so that the light is irradiated onto the lens at a suitable angle and position, and to avoid disordered diffusion or poor focusing of the light beam.

[0117] According to some embodiments of the present application, the mobile zoom optical system satisfies: 0.11≤(Dbm-dbm) / (Dcs-dcs)≤1.41;

[0118] Among them, Dbm is the outer diameter of the image side of the second lens barrel Pb, dbm is the inner diameter of the image side of the second lens barrel Pb, 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.

[0119] By properly controlling this conditional range, the rationality and strength of the lens barrel structure can be ensured. A suitable ratio helps the lens barrel withstand the weight of the internal optical components and the forces generated by the zoom operation during zooming, reducing the possibility of lens barrel deformation.

[0120] According to some embodiments of the present application, the mobile zoom optical system satisfies: 2.65<dam / Lb<3.10; wherein dam is the inner diameter of the image side of the first lens barrel Pa, and Lb is the maximum height of the second lens barrel Pb.

[0121] By properly controlling this conditional range, the beam can be ensured to propagate stably during zooming. This stable propagation helps maintain image quality and avoids issues such as image blur and contrast loss caused by disordered beam propagation.

[0122] According to another aspect of the present application, the present application further provides a mobile zoom optical system, comprising a first lens barrel Pa, a second lens barrel Pb, and a third lens barrel Pc in sequence along an optical axis, wherein the first lens barrel Pa and the third lens barrel Pc are fixed components, and the second lens barrel Pb is a mobile component;

[0123] The first lens barrel Pa contains a first lens E1 with positive refractive power and a first spacer element P1;

[0124] The first spacer element P1 is disposed against the image side surface of the first lens E1;

[0125] 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;

[0126] The second spacing element P2 is disposed against the image side surface of the second lens E2, and the third spacing element P3 is disposed against the image side surface of the third lens E3;

[0127] 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;

[0128] 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;

[0129] The mobile zoom optical system also satisfies the following: 1.59≤(EP23+CP3) / T34≤2.25; 1.0<ΔT / |dbs-dbm|<4.6; wherein, EP23 is the distance from the image side surface of the second spacer element P2 to the object side surface of the third spacer element P3 along the optical axis, CP3 is the maximum thickness of the third spacer element P3 along the optical axis, T34 is the air gap between the third lens E3 and the fourth lens E4 on the optical axis, ΔT is the maximum movable distance of the second lens barrel along the optical axis when the optical system changes 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.

[0130] In summary, the mobile zoom optical system provided by the present application constrains the on-axis air gap between the second lens and the third lens and the air gap at the edge of the lens through the conditional expression 1.59≤(EP23+CP3) / T34≤2.25, which helps to reasonably control the propagation path of light in the second group of lenses, effectively corrects aberrations such as astigmatism and coma, and optimizes the focusing performance of light at the edge and center of the lens, reducing image edge blur caused by astigmatism and tailing caused by coma, thereby improving image quality; however, this also easily causes the edge thickness of the lenses of the second group to be too thin, which is prone to image edge blur. The present application further reasonably controls the thickness of the lens edge structure through the conditional expression 1.0<ΔT / |dbs-dbm|<4.6, which is conducive to ensuring the rationality of size and structural strength. By ensuring that the second lens group maintains excellent structural stability during the assembly process and high-temperature and high-humidity reliability testing, the overall assembly stability of the zoom optical module is effectively enhanced.

[0131] 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.

[0132] Please refer to the attached Figure 1Some 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.

[0133] Example 1

[0134] 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.

[0135] 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.

[0136] In this embodiment:

[0137] 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.

[0138] 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.

[0139] 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;

[0140] The fourth lens element E4 has positive refractive power, and its object-side surface S9 and image-side surface S10 are convex.

[0141] 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.

[0142] The sixth lens element E6 has negative refractive power. The object-side surface S13 of the sixth lens element E6 is convex, and the image-side surface S14 is concave.

[0143] 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.

[0144] 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).

[0145] Table 1: Basic optical parameters of the mobile zoom optical system in Example 1

[0146]

[0147] 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, but is not limited to, the following aspherical surface formula:

[0148] ;

[0149] 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.

[0150] Table 2-1: Aspheric coefficients of the mobile zoom optical system of Example 1

[0151]

[0152] Table 2-2: Aspheric coefficients of the mobile zoom optical system of Example 1

[0153]

[0154] 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.

[0155] Table 3: Partial parameters of the mobile zoom optical system in different states in Example 1

[0156]

[0157] Example 2

[0158] like 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 second embodiment of the present application. Figure 4B FIG2 is a schematic diagram of the structure of a mobile zoom optical system according to a second 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.

[0159] 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.

[0160] 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.

[0161] Example 3

[0162] 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.

[0163] 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.

[0164] 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 Table 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.

[0165] 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.

[0166] Example 4

[0167] 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.

[0168] 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.

[0169] In this embodiment, the first lens E1 has positive focal power, with the object-side surface S1 of the first lens E1 being convex and the image-side surface S2 being convex; the second lens E2 has positive focal power, with the object-side surface S5 of the second lens E2 being convex and the image-side surface S6 being concave; the third lens E3 has negative focal power, with the object-side surface S7 of the third lens E3 being convex and the image-side surface S8 being concave; the fourth lens E4 has positive focal power, with the object-side surface S9 of the fourth lens E4 being convex and the image-side surface S10 being convex; the fifth lens E5 has negative focal power, with the object-side surface S11 of the fifth lens E5 being concave and the image-side surface S12 being convex; the sixth lens E6 has negative focal power, with the object-side surface S13 of the sixth lens E6 being concave and the image-side surface S14 being convex; and the seventh lens E7 has negative focal power, with the object-side surface S15 of the seventh lens E7 being convex and the image-side surface S16 being concave.

[0170] 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).

[0171] Table 4: Basic optical parameters of the mobile zoom optical system in Example 4

[0172]

[0173] 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:

[0174] 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.

[0175] Table 5-1: Aspheric coefficients of the mobile zoom optical system in Example 4

[0176]

[0177] Table 5-2: Aspheric coefficients of the mobile zoom optical system in Example 4

[0178]

[0179] 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.

[0180] Table 6: Some parameters of the mobile zoom optical system in different states in Example 4

[0181]

[0182] Example 5

[0183] 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.

[0184] 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.

[0185] 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.

[0186] Example 6

[0187] 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.

[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] 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.

[0190] 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.

[0191] Example 7

[0192] 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.

[0193] 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.

[0194] In this embodiment, 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 positive focal power, with the object-side surface S13 and the image-side surface S14 of the sixth lens E6 being concave. 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.

[0195] 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).

[0196] Table 7: Basic optical parameters of the mobile zoom optical system of Example 7

[0197]

[0198] 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.

[0199] 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.

[0200] Table 8-1: Aspheric coefficients of the mobile zoom optical system of Example 7

[0201]

[0202] Table 8-2: Aspheric coefficients of the mobile zoom optical system of Example 7

[0203]

[0204] 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.

[0205] Table 9: Partial parameters of the mobile zoom optical system in different states in Example 7

[0206]

[0207] Example 8

[0208] 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.

[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 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.

[0211] Example 9

[0212] 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.

[0213] 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.

[0214] 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.

[0215] 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.

[0216] 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 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 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 optical system changes from the first state to the second state are respectively shown in Table 10 below.

[0217] Table 10: Optical parameters of mobile zoom optical system

[0218]

[0219] In addition, the black object structural parameters of the mobile zoom optical system in Examples 1 to 9 are summarized as follows: d1s is the inner diameter of the object side surface of the first spacer element P1, d1m is the inner diameter of the image side surface of the first spacer element P1, d2s is the inner diameter of the object side surface of the second spacer element P2, D2s is the outer diameter of the object side surface of the second spacer element P2, D3s is the outer diameter of the object side surface of the third spacer element P3, d5s is the inner diameter of the object side surface of the fifth spacer element P5, d6m is the inner diameter of the image side surface of the sixth spacer element P6, D6m is the outer diameter of the image side surface of the sixth spacer element P6, das is the inner diameter of the object side surface of the first lens barrel Pa, dam is the inner diameter of the image side surface of the first lens barrel Pa, Das is the outer diameter of the object side surface of the first lens barrel Pa, dbs is the inner diameter of the object side surface of the second lens barrel Pb, dbm is the inner diameter of the image side surface of the second lens barrel Pb, Dbm is the outer diameter of the image side surface of the second lens barrel Pb, d cs is the inner diameter of the object side of the third lens barrel Pc, Dcs is the outer diameter of the object side of the third lens barrel Pc, La is the maximum height of the first lens barrel Pa, Lb is the maximum height of the second lens barrel Pb, Lc is the maximum height of the third lens barrel Pc, CP1 is the maximum thickness of the first spacing element P1 along the optical axis, EP23 is the spacing from the image side of the second spacing element P2 to the object side of the third spacing element P3 along the optical axis, CP3 is the maximum thickness of the third spacing element P3 along the optical axis, EP56 is the spacing from the image side of the fifth spacing element P5 to the object side of the sixth spacing element P6 along the optical axis, CP6 is the maximum thickness of the sixth spacing element P6 along the optical axis, EP67 is the spacing from the image side of the sixth spacing element P6 to the object side of the seventh spacing element P7 along the optical axis, CP7 is the maximum thickness of the seventh spacing element P7 along the optical axis, and the specific values ​​are shown in Table 11.

[0220] Table 11 Black object structure parameters of mobile zoom optical system

[0221]

[0222] In summary, the mobile zoom optical systems in Examples 1 to 9 satisfy the relationship shown in Table 12, as shown in Table 12.

[0223] Table 12: Relationships satisfied by mobile zoom optical systems

[0224]

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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 comprising a first lens barrel, a second lens barrel, and a third lens barrel in sequence along an optical axis; characterized in that: 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; The mobile zoom optical system also satisfies: 3.31≤f234 / Lb≤3.85; 1.0<ΔT / |dbs-dbm|<4.6; wherein, f234 is the combined focal length of the second lens, the third lens, and the fourth lens, Lb is the maximum height of the second lens barrel, ΔT is the maximum movable distance of the second lens barrel along the optical axis when the optical system changes from the first state to the second state, dbs is the inner diameter of the object side of the second lens barrel, and dbm is the inner diameter of the image side of the second lens barrel.

2. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 2.80≤La / CP1≤3.63; Wherein, La is the maximum height of the first lens barrel, and CP1 is the maximum thickness of the first spacer element along the optical axis.

3. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 1.35<f1 / (d1s+d1m)<1.70; Wherein, f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacer element, and d1m is the inner diameter of the image side of the first spacer element.

4. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 1.10≤(Das-das) / CT1≤2.72; 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 CT1 is the center thickness of the first lens on the optical axis.

5. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 1.59≤(EP23+CP3) / T34≤2.25; Among them, EP23 is the distance from the image side of the second spacer element to the object side of the third spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element along the optical axis, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

6. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 0.94≤d2s / (f2+f3)≤4.04; Wherein, d2s is the inner diameter of the side surface of the second spacer element, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.

7. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: -9.76≤f567 / (EP56+EP67)≤-7.04; Among them, f567 is the combined focal length of the fifth lens, the sixth lens and the seventh lens, 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 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.

8. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: -15.47≤f7 / Lc≤-6.24; Wherein, f7 is the effective focal length of the seventh lens, and Lc is the maximum height of the third lens barrel.

9. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies: 3.38≤(D2s+D3s) / Δf≤4.30; Wherein, D2s is the outer diameter of the side surface of the second spacer element, D3s is the outer diameter of the side surface of the third spacer element, and Δf is the change in the effective focal length of the mobile zoom optical system from the first state to the second state.

10. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 1.1<CT7 / (CP6+CP7)<2.2; Wherein, CT7 is the center thickness of the seventh lens on the optical axis, CP6 is the maximum thickness of the sixth spacing element along the optical axis, and CP7 is the maximum thickness of the seventh spacing element along the optical axis.

11. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 4.45<d5s / (CT5+CT6)<5.7; Wherein, d5s is the inner diameter of the side surface of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

12. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 1.7<(d6m+D6m) / R13<3.25; Wherein, d6m is the inner diameter of the image side surface of the sixth spacer element, D6m is the outer diameter of the image side surface of the sixth spacer element, and R13 is the curvature radius of the object side surface of the seventh lens.

13. The mobile zoom optical system according to claim 1, wherein: The mobile zoom optical system also satisfies the following conditions: 0.11≤(Dbm-dbm) / (Dcs-dcs)≤1.41; Among them, Dbm is the outer diameter of the image side of the second lens barrel, dbm is the inner diameter of the image side of the second 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: 2.65<dam / Lb<3.10; Wherein, dam is the inner diameter of the image side of the first lens barrel, and Lb is the maximum height of the second lens barrel.

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