Zoom optical system, lens module, and electronic device

Abstract

The application discloses a zoom optical system, a lens module and an electronic device, and belongs to the technical field of electronic devices. The zoom optical system comprises a reflecting assembly, a zoom lens assembly and a focusing lens assembly. The reflecting assembly, the zoom lens assembly and the focusing lens assembly are arranged at intervals along a first direction. At least one of the reflecting assembly, the zoom lens assembly and the focusing lens assembly can move along the first direction. The optical power of the reflecting assembly and the zoom lens assembly is a positive value, and the optical power of the focusing lens assembly is a negative value.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic devices, and particularly relates to a zoom optical system, a lens module and an electronic device. BACKGROUND

[0002] In the related art, in order to achieve more shooting effects, the camera device of an electronic device often needs to be provided with multiple different optical systems. For example, in order to improve the photography effect of different focal length sections in a long-focus shooting mode, such as a 3x shooting mode and a 5x shooting mode, the camera device usually adopts two optical systems to respectively realize the 3x shooting mode and the 5x shooting mode. This makes the volume and weight of the camera device increase, which is not conducive to the miniaturization design of the electronic device. Moreover, the camera device adopts digital zoom, and different optical systems bear the photography demand of different focal length sections, which leads to the loss of imaging quality. SUMMARY

[0003] The present application aims to provide a zoom optical system, a lens module and an electronic device, which can solve the technical problem of the increase of the volume and weight of the camera device and the poor imaging quality caused by the adoption of multiple optical systems in the related art.

[0004] In a first aspect, an embodiment of the present application provides a zoom optical system, comprising:

[0005] The reflection assembly, the zoom lens assembly and the focusing lens assembly are arranged at intervals along a first direction, and at least one of the reflection assembly, the zoom lens assembly and the focusing lens assembly is movable along the first direction.

[0006] The optical power of the reflection assembly and the zoom lens assembly is positive, and the optical power of the focusing lens assembly is negative.

[0007] In a second aspect, an embodiment of the present application provides a lens module, comprising: the zoom optical system of the first aspect; a filter, the light entrance surface of the filter being opposite to the light exit surface of the zoom optical system; and a photosensitive chip, the photosensitive chip being opposite to the light exit surface of the filter.

[0008] In a third aspect, an embodiment of the present application provides an electronic device, comprising: the lens module of the second aspect.

[0009] The zoom optical system of the embodiment of the present application, by setting the reflecting assembly, the zoom lens assembly and the focusing lens assembly, and further by adjusting the relative positions between the reflecting assembly, the zoom lens assembly and the focusing lens assembly, on one hand, zooming and focusing can be realized, physical optical zooming can be realized, so that the quality of imaging in the shooting process can be ensured. On the other hand, different focal length shooting modes can be realized by one zoom optical system, therefore, the electronic device adopting the zoom optical system of the embodiment of the present application does not need to set multiple optical systems to realize different focal length shooting modes, the volume and weight of the electronic device can be effectively reduced. In addition, the reflecting assembly also has optical power, in the shooting process, the reflecting assembly can cooperate with the zoom lens assembly and the focusing lens assembly to zoom and focus the light, so that the length of the zoom lens assembly and the focusing lens assembly can be saved, the total length of the zoom optical system is reduced, and the volume and weight of the zoom optical system are further reduced.

[0010] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0012] Figure 1 One of the structural schematic diagrams of the zoom optical system of the embodiment of the present application is shown;

[0013] Figure 2 One of the structural schematic diagrams of the zoom optical system of the embodiment of the present application is shown;

[0014] Figure 3 One of the structural schematic diagrams of the zoom optical system of the embodiment of the present application is shown;

[0015] Figure 4 The axial chromatic aberration curve of the zoom optical system of Figure 2 is shown;

[0016] Figure 5 The axial chromatic aberration curve of the zoom optical system of Figure 3 is shown;

[0017] Figure 6 The modulation transfer function curve of the zoom optical system of Figure 2 is shown;

[0018] Figure 7 The modulation transfer function curve of the zoom optical system of Figure 3 is shown;

[0019] Figure 8 A fourth structural diagram of the zoom optical system according to an embodiment of the present application is shown;

[0020] Figure 9 FIG5 shows a fifth structural diagram of the zoom optical system according to an embodiment of the present application;

[0021] Figure 10 Shown Figure 8 Vertical axis chromatic aberration curve of the zoom optical system;

[0022] Figure 11 Shown Figure 9 Vertical axis chromatic aberration curve of the zoom optical system;

[0023] Figure 12 Shown Figure 8 Modulation transfer function curve of zoom optical system;

[0024] Figure 13 Shown Figure 9 Modulation transfer function curve of zoom optical system;

[0025] Figure 14 FIG6 shows a sixth structural diagram of the zoom optical system according to an embodiment of the present application;

[0026] Figure 15 FIG7 shows a seventh structural diagram of the zoom optical system according to an embodiment of the present application;

[0027] Figure 16 Shown Figure 14 Vertical axis chromatic aberration curve of the zoom optical system;

[0028] Figure 17 Shown Figure 15 Vertical axis chromatic aberration curve of the zoom optical system;

[0029] Figure 18 Shown Figure 14 Modulation transfer function curve of zoom optical system;

[0030] Figure 19 Shown Figure 15 Modulation transfer function curve of zoom optical system;

[0031] Figure 20 FIG8 shows an eighth structural diagram of a zoom optical system according to an embodiment of the present application;

[0032] Figure 21 A ninth structural diagram of the zoom optical system according to an embodiment of the present application is shown;

[0033] Figure 22 Shown Figure 20a vertical chromatic aberration curve of the zoom optical system of

[0034] Figure 23 a vertical chromatic aberration curve of the zoom optical system of Figure 21 a vertical chromatic aberration curve of the zoom optical system of

[0035] Figure 24 a vertical chromatic aberration curve of the zoom optical system of Figure 20 a modulation transfer function curve of the zoom optical system of

[0036] Figure 25 a modulation transfer function curve of the zoom optical system of Figure 21 a modulation transfer function curve of the zoom optical system of

[0037] Figure 26 a structural schematic diagram of a lens module of an embodiment of the present application is shown;

[0038] Figure 27 a structural block diagram of an electronic device of an embodiment of the present application is shown.

[0039] Reference Signs:

[0040] 100 zoom optical system, 102 reflection component, 104 zoom lens component, 106 focusing lens component, 108 first prism, 110 first incidence surface, 112 first reflection surface, 114 first emission surface, 116 second prism, 118 second incidence surface, 120 second reflection surface, 122 second emission surface, 124 first lens, 126 second lens, 128 third lens, 200 lens module, 202 filter, 204 photosensitive chip, 300 electronic device. DETAILED DESCRIPTION

[0041] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0042] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0043] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] The following describes the zoom optical system, lens module and electronic device according to the embodiments of the present application. Figures 1 to 27 The following describes the zoom optical system, lens module and electronic device according to the embodiments of the present application.

[0045] In some embodiments of the present application, a zoom optical system is provided, Figure 1 One of the structural schematic diagrams of the zoom optical system according to the embodiments of the present application is shown. As shown in the figure, Figure 1 The zoom optical system 100 includes a reflecting assembly 102, a zoom lens assembly 104 and a focusing lens assembly 106, the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are arranged at intervals along a first direction, and at least one of the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 is movable along the first direction; wherein the reflecting assembly 102 and the zoom lens assembly 104 have positive optical power, and the focusing lens assembly 106 has negative optical power.

[0046] In the embodiments of the present application, the zoom optical system 100 includes the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, and the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are arranged at intervals along a first direction. The reflecting assembly 102 can be used to reflect light during the shooting process, so that the light can pass through the zoom lens assembly 104 and the focusing lens assembly 106 along the first direction, to realize zooming and focusing of the light, and thus realize the shooting process of the zoom optical system 100.

[0047] Further, at least one of the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 is movable along the first direction, so as to adjust the relative positions between the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, and thus realize zooming and focusing. That is, the zoom optical system 100 of the present application realizes zooming and focusing by adjusting the relative positions between the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, that is, realizes physical optical zooming, so as to ensure the quality of imaging during the shooting process.

[0048] And, by adjusting the relative positions among the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, the switching among different focal length sections can be realized, that is, the shooting modes of different focal length sections can be realized by one zoom optical system 100, therefore, the electronic device using the zoom optical system 100 of the embodiment of the present application does not need to realize the shooting modes of different focal length sections by setting multiple optical systems, and the volume and weight of the electronic device can be effectively reduced.

[0049] Further, the optical power of the reflecting assembly 102 and the zoom lens assembly 104 is positive, and the optical power of the focusing lens assembly 106 is negative, that is, the zoom optical system 100 of the embodiment of the present application not only has the zoom lens assembly 104 and the focusing lens assembly 106 with optical power to realize zooming and focusing during shooting, but also has the reflecting assembly 102 with optical power, and the optical power of the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 is set to ensure that the zoom optical system 100 can normally shoot. Therefore, during shooting, the reflecting assembly 102 can cooperate with the zoom lens assembly 104 and the focusing lens assembly 106 to zoom and focus light, so that the lengths of the zoom lens assembly 104 and the focusing lens assembly 106 can be saved, and the total length of the zoom optical system 100 is reduced, and the volume and weight of the zoom optical system are further reduced.

[0050] The zoom optical system 100 of the embodiment of the present application sets the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, and further adjusts the relative positions among the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106, on the one hand, zooming and focusing can be realized, and physical optical zooming can be realized, so that the imaging quality during shooting can be ensured. On the other hand, the shooting modes of different focal length sections can be realized by one zoom optical system 100, therefore, the electronic device using the zoom optical system 100 of the embodiment of the present application does not need to realize the shooting modes of different focal length sections by setting multiple optical systems, and the volume and weight of the electronic device can be effectively reduced. In addition, the reflecting assembly 102 also has optical power, and during shooting, the reflecting assembly 102 can cooperate with the zoom lens assembly 104 and the focusing lens assembly 106 to zoom and focus light, so that the lengths of the zoom lens assembly 104 and the focusing lens assembly 106 can be saved, and the total length of the zoom optical system 100 is reduced, and the volume and weight of the zoom optical system are further reduced.

[0051] In some embodiments of the present application, the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 have a first position and a second position, wherein the zoom optical system 100 operates in the first position, the second position and any position between the first position and the second position, in the first position, the focal length of the zoom optical system 100 is a first focal length, in the second position, the focal length of the zoom optical system 100 is a second focal length, the first focal length and the second focal length satisfy: a≤ft÷fw≤b;

[0052] wherein ft is the first focal length, fw is the second focal length, a is a first threshold value, and b is a second threshold value.

[0053] In the embodiments of the present application, the switching between different focal length sections can be achieved by adjusting the relative positions between the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106. Specifically, the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 have a first position and a second position, and the zoom optical system 100 can operate in the first position, the second position and any position between the first position and the second position. In the first position, the zoom optical system is in a first shooting mode, for example, the first shooting mode can be a telephoto mode. In the second position, the zoom optical system is in a second shooting mode, for example, the second shooting mode can be a wide-angle mode.

[0054] Further, in the first shooting mode, the focal length of the zoom optical system 100 is a first focal length, in the second shooting mode, the focal length of the zoom optical system 100 is a second focal length, and the first focal length and the second focal length satisfy a≤ft÷fw≤b; wherein ft is the first focal length, fw is the second focal length, a is a first threshold value, and b is a second threshold value. That is, the ratio between the first focal length and the second focal length is greater than or equal to a and less than or equal to b. Specifically, a and b can be set according to the actual operation requirements of the zoom optical system 100, for example, a can be 1.3 and b can be 2.5. That is, the first focal length and the second focal length satisfy: 1.3≤ft÷fw≤2.5, wherein ft is the first focal length and fw is the second focal length.

[0055] By setting the relationship between the first focal length and the second focal length, the zoom optical system 100 can have a suitable zoom ratio, so that the zoom optical system 100 can have a good shooting effect for different shooting environments.

[0056] Exemplarily, as Figure 2 , Figure 8 , Figure 14 and Figure 20As shown, at this time, the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are in the first position, that is, at this time, the shooting mode of the zoom optical system 100 is the first shooting mode. As shown in FIG. 1B, the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are in the second position, that is, at this time, the shooting mode of the zoom optical system 100 is the second shooting mode. Figure 3 、 Figure 9 、 Figure 15 and Figure 21 As shown, at this time, the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are in the first position, that is, at this time, the shooting mode of the zoom optical system 100 is the first shooting mode. As shown in FIG. 1B, the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are in the second position, that is, at this time, the shooting mode of the zoom optical system 100 is the second shooting mode.

[0057] In some embodiments of the present application, the focal length of the reflection assembly 102 is a third focal length, and the first focal length and the third focal length satisfy: f1>2×ft; wherein ft is the first focal length, and f1 is the third focal length. The third focal length is greater than 2 times the first focal length.

[0058] In the embodiments of the present application, the focal length of the reflection assembly 102 is a third focal length, and the third focal length satisfies: f1>2×ft; wherein f1 is the third focal length, and ft is the first focal length. That is, the third focal length is greater than 2 times the first focal length, that is, the third focal length of the reflection assembly 102 is greater than the first focal length of the zoom optical system 100 in the first shooting mode.

[0059] Through the setting of the third focal length of the reflection assembly 102, the reflection assembly 102 can not only achieve the effect of converging light, but also make the optical power of the reflection assembly 102 as small as possible, thereby reducing the anti-shake sensitivity of the zoom optical system 100 to improve the anti-shake effect of the zoom optical system.

[0060] In some embodiments of the present application, the focal length of the zoom lens assembly 104 is a fourth focal length, and the focal length of the focusing lens assembly 106 is a fifth focal length; wherein the fifth focal length and the fourth focal length satisfy: c<|f3÷f2|<d; wherein f2 is the fourth focal length, f3 is the fifth focal length, c is a third threshold value, and d is a fourth threshold value.

[0061] In the embodiments of the present application, the focal length of the zoom lens assembly 104 is a fourth focal length, and the focal length of the focusing lens assembly 106 is a fifth focal length, and the fourth focal length and the fifth focal length satisfy: c<|f3÷f2|<d; wherein f2 is the fourth focal length, f3 is the fifth focal length, c is a third threshold value, and d is a fourth threshold value. Specifically, c and d can be set according to the actual operation requirements of the zoom optical system 100. For example, c can be set to 0.8, and d can be set to 1.5, that is, the fourth focal length and the fifth focal length satisfy: 0.8<|f3÷f2|<1.5.

[0062] By setting the relationship between the fourth focal length and the fifth focal length, that is, setting the relationship between the focal length of the zoom lens assembly 104 and the focal length of the focusing lens assembly 106, the aberration of the zoom optical system 100 can be converged to a larger extent during shooting, thereby effectively improving the imaging quality during shooting.

[0063] In some embodiments of the present application, the maximum movement stroke of the zoom lens assembly 104 between the first position and the second position satisfies: e x (ft-fw) < D1 < j x (ft-fw); where D1 is the movement stroke of the zoom lens assembly 104, ft is the first focal length, fw is the second focal length, e is a first preset value, and j is a second preset value.

[0064] In the embodiments of the present application, during the movement of the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 between the first position and the second position, the maximum movement stroke D1 of the zoom lens assembly 104 satisfies: e x (ft-fw) < D1 < j x (ft-fw), where ft is the first focal length, that is, the focal length of the zoom optical system 100 in the first shooting mode is the first focal length, fw is the second focal length, that is, the focal length of the zoom optical system 100 in the second shooting mode is the second focal length, e is a first preset value, and j is a second preset value. Specifically, e and j can be set according to the actual operation requirements of the zoom optical system 100, for example, e can be set to 0.3, and j can be set to 0.7, that is, D1 satisfies: 0.3 x (ft-fw) < D1 < 0.7 x (ft-fw).

[0065] By setting the maximum movement stroke of the zoom lens assembly 104, the zoom range of the zoom optical system between the first shooting mode and the second shooting mode can be matched, on the one hand, the maximum stroke of the zoom lens assembly 104 can be reduced, the demand for the driving motor of the zoom lens assembly 104 can be reduced, and on the other hand, the sensitivity of the zoom lens assembly 104 can be ensured, and the zoom optical system 100 can realize a fast and accurate zoom process.

[0066] In some embodiments of the present application, the maximum movement stroke of the focusing lens assembly 106 between the first position and the second position satisfies: g x (ft-fw) < D2 < h x (ft-fw); where D2 is the movement stroke of the focusing lens assembly 106, ft is the first focal length, fw is the second focal length, g is a third preset value, and h is a fourth preset value.

[0067] In the embodiments of the present application, during the movement of the reflection component 102, the zoom lens component 104 and the focusing lens component 106 between the first position and the second position, the maximum movement stroke D2 of the focusing lens component 106 satisfies: g x (ft-fw) < D2 < h x (ft-fw), where ft is the first focal length, i.e., the focal length of the zoom optical system 100 in the first shooting mode is the first focal length, fw is the second focal length, i.e., the focal length of the zoom optical system 100 in the second shooting mode is the second focal length, g is a third preset value, and h is a fourth preset value. Specifically, g and h can be set according to the actual operation requirements of the zoom optical system 100, for example, g can be set as 0.7 and h can be set as 1.3, that is, D2 satisfies: 0.7 x (ft-fw) < D2 < 1.3 x (ft-fw).

[0068] Through the setting of the maximum movement stroke of the focusing lens component 106, in cooperation with the zoom range of the zoom optical system 100 between the first shooting mode and the second shooting mode, on the one hand, the maximum stroke of the focusing lens component 106 can be reduced, and the requirement of the driving motor of the focusing lens component 106 can be reduced, and on the other hand, the sensitivity of the focusing lens component 106 can be ensured, and the zoom optical system 100 can realize a fast and accurate zoom process.

[0069] In some embodiments of the present application, the reflection component 102 includes a first prism 108, the first prism 108 includes a first incident surface 110, a first reflection surface 112 and a first exit surface 114, and the optical power of the first prism 108 is positive. The first exit surface 114 is opposite to the zoom lens component 104.

[0070] In the embodiments of the present application, as shown in Figure 1 The reflection component 102 can include a first prism 108, and the first prism 108 includes a first incident surface 110. It can be understood that during shooting, light can enter the prism through the first incident surface 110 of the first prism 108. Further, the first prism 108 further includes a first reflection surface 112 and a first exit surface 114, and the first exit surface 114 is opposite to the zoom lens component 104. During shooting, after the light enters the first prism 108 through the first incident surface 110, the light can propagate along the first direction after being reflected by the first reflection surface 112, and then enter the zoom lens component 104 and the focusing lens component 106 in sequence through the first exit surface 114 of the first prism 108.

[0071] Further, the first prism 108 has positive optical power, that is, the first prism 108 has optical power while changing the light path, so that the first prism 108 can cooperate with the zoom lens assembly 104 and the focus lens assembly 106 to zoom and focus the light, thereby saving the length of the zoom lens assembly 104 and the focus lens assembly 106, and reducing the total length of the zoom optical system 100, and further reducing the volume and weight of the zoom optical system 100.

[0072] In some embodiments of the present application, the first incident surface 110 is a convex surface, and the first incident surface 110 is an aspheric surface, and the first exit surface 114 is a flat surface or a concave surface.

[0073] In the embodiments of the present application, the first incident surface 110 of the first prism 108 can be a convex surface, so that the light can be converged to further improve the light quantity in the shooting process and improve the shooting quality. Further, the first incident surface 110 can also be an aspheric surface, so as to further improve the processing effect of the first prism 108 on the light, and further improve the shooting effect of the zoom optical system 100.

[0074] Further, the first exit surface 114 of the first prism 108 can be a flat surface or a concave surface, so as to ensure that the light can propagate to the zoom lens assembly 104 and the focus lens assembly 106 along the first direction after passing through the first exit surface 114.

[0075] In some embodiments of the present application, the reflection assembly 102 includes a second prism 116, the second prism 116 including a second incident surface 118, a second reflection surface 120 and a second exit surface 122; a first lens 124 opposite to the second incident surface 118; wherein the first lens 124 has positive optical power, and the second exit surface 122 is opposite to the zoom lens assembly 104.

[0076] In the embodiments of the present application, Figure 20 Fig. 8 shows a structural schematic diagram of a zoom optical system according to an embodiment of the present application; Figure 21 Fig. 9 shows a structural schematic diagram of a zoom optical system according to an embodiment of the present application; as Figure 20 and Figure 21As shown, the reflection assembly 102 can include a second prism 116 and a first lens 124, wherein the second prism 116 includes a second incident surface 118, and the first lens 124 is opposite to the second incident surface 118 of the second prism 116. That is, during shooting, the light first passes through the first lens 124, and then enters the second prism 116 through the second incident surface 118 of the second prism 116. Further, the second prism 116 further includes a second reflection surface 120 and a second exit surface 122, and the second exit surface 122 is opposite to the zoom lens assembly 104. During shooting, after the light enters the second prism 116 through the second incident surface 118, the light can propagate in the first direction after being reflected by the second reflection surface 120, and then enters the zoom lens assembly 104 and the focusing lens assembly 106 in turn through the second exit surface 122 of the second prism 116.

[0077] Further, the optical power of the first lens 124 is positive, so that the reflection assembly 102 has optical power, and then the reflection assembly 102 can cooperate with the zoom lens assembly 104 and the focusing lens assembly 106 to zoom and focus the light, so as to save the length of the zoom lens assembly 104 and the focusing lens assembly 106, reduce the total length of the zoom optical system 100, and further reduce the volume and weight of the zoom optical system 100.

[0078] In some embodiments of the present application, both sides of the first lens 124 are aspherical surfaces.

[0079] In the embodiments of the present application, by setting both sides of the first lens 124 as aspherical surfaces, the imaging effect of the zoom optical system 100 can be effectively improved. It can be understood that the aspherical surface lens has high optical performance and can effectively reduce aberration, thereby improving the clarity and quality of imaging. Moreover, compared with the aberration caused by the spherical lens, the aspherical surface shape can better meet the needs of the zoom optical system 100, can reduce or eliminate the inherent aberration of the spherical lens, and improve the imaging quality of the zoom optical system 100.

[0080] Specifically, in a plane rectangular coordinate system, the expression of the aspherical surface is:

[0081]

[0082] Wherein, the horizontal axis of the plane rectangular coordinate system is the x-axis, and the vertical axis is the z-axis, c is the surface curvature of different positions of the aspherical surface, K is the conic constant, A, B, C, D, E, F, and G are aspherical surface coefficients.

[0083] In some embodiments of the present application, the zoom lens assembly 104 includes at least three second lenses 126, and the at least three second lenses 126 are arranged in the first direction.

[0084] In the embodiment of the present application, as shown in Figure 1 The zoom lens assembly 104 can include at least three second lenses 126. After the light is reflected by the reflection assembly 102, the light propagates to the zoom lens assembly 104 along the first direction, and then sequentially passes through the at least three second lenses 126 of the zoom lens assembly 104. In combination with the movement of the zoom lens assembly 104 along the first direction, the light is zoomed to meet the shooting requirements of different focal length sections of the zoom optical system 100.

[0085] Further, the at least three second lenses 126 of the zoom lens assembly 104 can be aspherical lenses, thereby improving the optical performance of the zoom lens assembly 104, effectively reducing aberration, and further improving the clarity and quality of the imaging of the zoom optical system 100.

[0086] In some embodiments of the present application, the focusing lens assembly 106 includes at least two third lenses 128, which are arranged at intervals along the first direction.

[0087] In the embodiment of the present application, as shown in Figure 1 The focusing lens assembly 106 can include at least two third lenses 128. After the light is reflected by the reflection assembly 102, the light propagates to the zoom lens assembly 104 along the first direction, and then sequentially passes through the at least three second lenses 126 of the zoom lens assembly 104. In combination with the movement of the zoom lens assembly 104 along the first direction, the light is zoomed. Further, the light propagates to the focusing lens assembly 106 along the first direction, and then sequentially passes through the at least two third lenses 128 of the focusing lens assembly 106. In combination with the movement of the focusing lens assembly 106 along the first direction, the light is focused to meet the shooting requirements of different focal length sections of the zoom optical system 100.

[0088] In some embodiments of the present application, the third lens 128 is an aspherical lens.

[0089] In the embodiment of the present application, the at least two third lenses 128 of the focusing lens assembly 106 can be aspherical lenses, thereby improving the optical performance of the focusing lens assembly 106, effectively reducing aberration, and further improving the clarity and quality of the imaging of the zoom optical system 100.

[0090] The embodiment of the present application also provides a lens module, Figure 26 The structure schematic diagram of the lens module of the embodiment of the present application is shown; as shown in Figure 26As shown, the lens module 200 includes a zoom optical system 100 as any one of the above embodiments; a filter 202, wherein the light incident surface of the filter 202 is opposite to the light exit surface of the zoom optical system 100; and a photosensitive chip 204, wherein the photosensitive chip 204 is opposite to the light exit surface of the filter 202.

[0091] In the embodiment of the present application, the lens module 200 includes the zoom optical system 100 of any of the above embodiments, as well as a filter 202 and a photosensitive chip 204. The light entrance surface of the filter 202 is opposite to the light exit surface of the zoom optical system 100. That is, after zooming and focusing through the zoom optical system 100, light enters the filter 202 for filtering, filtering out infrared and other light in the light to ensure the imaging effect. Furthermore, the photosensitive chip 204 is opposite to the light exit surface of the filter 202. After filtering, the light is processed by the photosensitive chip 204 to achieve imaging.

[0092] Furthermore, the lens module 200 provided in the embodiment of the present application has the zoom optical system 100 as any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which are not described in detail here.

[0093] In some embodiments of the present application, the lens module 200 also includes: a driving member (not shown in the figure), which is connected to the reflection assembly 102, the zoom lens assembly 104 and the focus lens assembly 106, and is used to drive at least one of the reflection assembly 102, the zoom lens assembly 104 and the focus lens assembly 106 to move along the first direction.

[0094] In an embodiment of the present application, by setting a driving member, at least one of the reflection component 102, the zoom lens component 104 and the focus lens component 106 can be driven so that at least one of the reflection component 102, the zoom lens component 104 and the focus lens component 106 moves along a first direction, thereby realizing the zooming and focusing process.

[0095] Furthermore, the driving component can also drive the reflective component 102 to cooperate with the transmitting component to form an anti-shake component. That is, during the shooting process, the driving component can drive the reflective component 102 to move accordingly according to the shaking process of the lens module 200 to achieve anti-shake shooting.

[0096] For example, Figure 2 and Figure 3 As shown, Figure 2 Indicates that the zoom optical system 100 is in the first shooting mode, Figure 3The zoom optical system 100 is in the second shooting mode. The zoom optical system 100 comprises a reflecting assembly 102, a zoom lens assembly 104 and a focusing lens assembly 106. The reflecting assembly 102 comprises a first prism 108, the entrance surface of the first prism 108 is aspheric, the reflecting surface is planar, and the exit surface is planar. The first prism 108 can move along a first direction during zooming of the zoom optical system 100.

[0097] Further, the zoom lens assembly 104 comprises four second lenses 126, which are lens L1, lens L2, lens L3 and lens L4 along the first direction. The focal power of the lens L1 is negative, the focal power of the lens L2 is positive, the focal power of the lens L3 is negative, and the focal power of the lens L4 is positive. The four second lenses 126 are aspheric lenses. The zoom lens assembly 104 can move along the first direction during zooming of the zoom optical system 100.

[0098] Further, the focusing lens assembly 106 comprises three third lenses 128, which are lens L5, lens L6 and lens L7 along the first direction. The focal power of the lens L5 is negative, the focal power of the lens L6 is positive, and the focal power of the lens L7 is negative. The three third lenses 128 are aspheric lenses. The focusing lens assembly 106 can move along the first direction during zooming of the zoom optical system 100.

[0099] Specifically, the parameters in the shooting process of the zoom optical system 100 are shown in Table 1:

[0100] Table 1

[0101]

[0102] Wherein, f1 is the focal length of the reflecting assembly 102, f2 is the focal length of the zoom lens assembly 104, and f3 is the focal length of the focusing lens assembly 106.

[0103] Further, the parameters of the lenses in the reflecting assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are shown in Table 2:

[0104] Table 2

[0105]

[0106]

[0107] Wherein, S1 to S20 are the serial numbers of the surfaces passed by the light rays. Further, the aspheric high-order term coefficients of S1 to S17 are shown in Table 3:

[0108] Table 3

[0109]

[0110]

[0111] Here, S4 (stop) indicates that an aperture is provided on the S4 surface.

[0112] Furthermore, in the first shooting mode, the vertical axis chromatic aberration of the zoom optical system 100 is as follows: Figure 4 As shown, the modulation transfer function of the zoom optical system 100 is as follows: Figure 6 In the second shooting mode, the vertical axis chromatic aberration of the zoom optical system 100 is as follows: Figure 5 As shown, the modulation transfer function of the zoom optical system 100 is as follows: Figure 7 As shown in the figure, the zoom optical system 100 of this embodiment maintains vertical axial chromatic aberration within a very small range in both the first and second shooting modes, with good chromatic aberration convergence. Furthermore, at a spatial frequency of 100 lp / mm, the modulation transfer function across the entire field of view is greater than 0.5, demonstrating extremely high resolution.

[0113] For example, Figure 8 and Figure 9 As shown, Figure 8 Indicates that the zoom optical system 100 is in the first shooting mode, Figure 9 The zoom optical system 100 is in the second shooting mode. The zoom optical system 100 includes a reflective assembly 102, a zoom lens assembly 104, and a focus lens assembly 106. The reflective assembly 102 includes a first prism 108. The first prism 108 has an aspherical incident surface, a flat reflective surface, and a flat exit surface.

[0114] Furthermore, the zoom lens assembly 104 includes four second lenses 126. Along the first direction, the four second lenses 126 are lens L1, lens L2, lens L3, and lens L4, respectively. Lens L1 has a negative focal power, lens L2 has a positive focal power, lens L3 has a negative focal power, and lens L4 has a positive focal power. All four second lenses 126 are aspherical lenses.

[0115] Furthermore, the focusing lens assembly 106 includes three third lenses 128. Along the first direction, the three third lenses 128 are lens L5, lens L6 and lens L7, wherein the optical focal length of lens L5 is negative, the optical focal length of lens L6 is positive, and the optical focal length of lens L7 is negative.

[0116] In this embodiment, during the zooming process of the zoom optical system 100 , the position of the reflective assembly 102 remains unchanged, and the zoom lens assembly 104 and the focus lens assembly 106 move along a first direction.

[0117] Specifically, the parameters of the zoom optical system 100 during the shooting process are shown in Table 4:

[0118] Table 4

[0119]

[0120]

[0121] Wherein, f1 is the focal length of the reflective assembly 102 , f2 is the focal length of the zoom lens assembly 104 , and f3 is the focal length of the focus lens assembly 106 .

[0122] Furthermore, the parameters of each lens in the reflection assembly 102, the zoom lens assembly 104 and the focus lens assembly 106 are shown in Table 5:

[0123] Table 5

[0124]

[0125] Among them, S1 to S20 are the serial numbers of the surfaces that the light passes through.

[0126] Furthermore, the aspheric high-order coefficients of S1 to S19 are shown in Table 6:

[0127] Table 6

[0128]

[0129]

[0130] Here, S4 (stop) indicates that an aperture is provided on the S4 surface.

[0131] Furthermore, in the first shooting mode, the vertical axis chromatic aberration of the zoom optical system 100 is as follows: Figure 10 As shown, the modulation transfer function of the zoom optical system 100 is as follows: Figure 12 In the second shooting mode, the vertical axis chromatic aberration of the zoom optical system 100 is as follows: Figure 11 As shown, the modulation transfer function of the zoom optical system 100 is as follows: Figure 13 As shown in the figure, the zoom optical system 100 of this embodiment maintains vertical axial chromatic aberration within a very small range in both the first and second shooting modes, with good chromatic aberration convergence. Furthermore, at a spatial frequency of 100 lp / mm, the modulation transfer function across the entire field of view is greater than 0.5, demonstrating extremely high resolution.

[0132] For example, Figure 14 and Figure 15 As shown, Figure 14Indicates that the zoom optical system 100 is in the first shooting mode, Figure 15 The zoom optical system 100 is in the second shooting mode. The zoom optical system 100 includes a reflection component 102 , a zoom lens component 104 , and a focus lens component 106 , wherein the reflection component 102 includes a first prism 108 .

[0133] Furthermore, the zoom lens assembly 104 includes four second lenses 126 . Along the first direction, the four second lenses 126 are lens L1 , lens L2 , lens L3 , lens L4 and lens L5 , and all of the five second lenses 126 are aspherical lenses.

[0134] Furthermore, the focusing lens assembly 106 includes three third lenses 128 . Along the first direction, the three third lenses 128 are lens L6 , lens L7 , and lens L8 .

[0135] In this embodiment, during the zooming process of the zoom optical system 100 , the position of the reflective assembly 102 remains unchanged, and the zoom lens assembly 104 and the focus lens assembly 106 move along a first direction.

[0136] Specifically, the parameters of the zoom optical system 100 during the shooting process are shown in Table 7:

[0137] Table 7

[0138]

[0139] Wherein, f1 is the focal length of the reflective assembly 102 , f2 is the focal length of the zoom lens assembly 104 , and f3 is the focal length of the focus lens assembly 106 .

[0140] Furthermore, the parameters of each lens in the reflection assembly 102, the zoom lens assembly 104 and the focus lens assembly 106 are shown in Table 8:

[0141] Table 8

[0142]

[0143] Among them, S1 to S22 are the serial numbers of the surfaces that the light passes through.

[0144] Furthermore, the aspheric high-order coefficients of S1 to S19 are shown in Table 9:

[0145] Table 9

[0146]

[0147]

[0148] Here, S4 (stop) indicates that an aperture is provided on the S4 surface.

[0149] Further, in the first shooting mode, the sagittal chromatic aberration of the zoom optical system 100 is as shown in FIG. 6A, and the modulation transfer function of the zoom optical system 100 is as shown in FIG. 6B. Figure 16 Figure 18 Further, in the second shooting mode, the sagittal chromatic aberration of the zoom optical system 100 is as shown in FIG. 6C, and the modulation transfer function of the zoom optical system 100 is as shown in FIG. 6D. Figure 17 Figure 19 It can be seen that the sagittal chromatic aberration of the zoom optical system 100 in the first shooting mode and the second shooting mode is controlled in a very small range, and the chromatic aberration converges well. And the modulation transfer function of the full field of view is greater than 0.5 at the spatial frequency of 100 lp / mm, which has extremely high resolution.

[0150] Exemplarily, as shown in FIG. 7A and FIG. 7B, wherein, Figure 20 Figure 21 indicates that the zoom optical system 100 is in the first shooting mode, Figure 20 Figure 21 indicates that the zoom optical system 100 is in the second shooting mode. The zoom optical system 100 comprises a reflection assembly 102, a zoom lens assembly 104 and a focusing lens assembly 106, wherein the reflection assembly 102 comprises a first lens 124 and a second prism 116, the entrance surface of the second prism 116 is aspherical, the reflection surface is planar, and the exit surface is planar.

[0151] Further, the zoom lens assembly 104 comprises four second lenses 126, which are lens L1, lens L2, lens L3 and lens L4 along the first direction, wherein the optical power of lens L1 is negative, the optical power of lens L2 is positive, the optical power of lens L3 is negative, and the optical power of lens L4 is positive. The four second lenses 126 are aspherical lenses.

[0152] Further, the focusing lens assembly 106 comprises three third lenses 128, which are lens L5, lens L6 and lens L7 along the first direction, wherein the optical power of lens L5 is negative, the optical power of lens L6 is positive, and the optical power of lens L7 is negative.

[0153] Specifically, the parameters of the zoom optical system 100 in the shooting process are as shown in Table 10:

[0154] Table 10

[0155]

[0156] Wherein, f1 is the focal length of the reflection assembly 102, f2 is the focal length of the zoom lens assembly 104, and f3 is the focal length of the focusing lens assembly 106. ​​​​

[0157] Further, parameters of each lens in the reflection assembly 102, the zoom lens assembly 104 and the focusing lens assembly 106 are shown in Table 11:

[0158] Table 11

[0159]

[0160] Wherein, S1 to S22 are serial numbers of surfaces passed by the light rays.

[0161] Further, aspheric high order term coefficients of S1 to S19 are shown in Table 12:

[0162] Table 12

[0163]

[0164]

[0165] Wherein, S6(stop) indicates that a stop is arranged at the S6 surface.

[0166] Further, in the first shooting mode, the axial chromatic aberration of the zoom optical system 100 is shown in Figure 22 , the modulation transfer function of the zoom optical system 100 is shown in Figure 24 . In the second shooting mode, the axial chromatic aberration of the zoom optical system 100 is shown in Figure 23 , the modulation transfer function of the zoom optical system 100 is shown in Figure 25 . It can be seen that the axial chromatic aberration of the zoom optical system 100 in the first shooting mode and the second shooting mode is controlled in a very small range, and the chromatic aberration converges well. And, the modulation transfer function of the full field of view is greater than 0.5 at the spatial frequency of 100 lp / mm, and has very high resolution.

[0167] The embodiment of the present application also provides an electronic device 300, Figure 27 The structure schematic diagram of the electronic device of the embodiment of the present application is shown in Figure 27 The electronic device 300 includes a mainboard and the lens module 200 of any one of the above embodiments, and the lens module 200 is electrically connected with the mainboard.

[0168] The electronic device 300 provided by the embodiment of the present application includes a mainboard and the lens module 200 of any one of the above embodiments, and the lens module 200 is electrically connected with the mainboard, so that the operation of the lens module 200 can be controlled by the control chip on the mainboard. In addition, the electronic device 300 of the embodiment of the present application has the lens module 200 of any one of the above embodiments, and has the beneficial effects of any one of the above embodiments, which will not be described here.

[0169] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0170] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made therein without departing from the spirit and scope of the application. The application is not to be limited by the embodiments shown and described, but only by the claims and their equivalents.

Claims

1. A zoom optical system, characterized in that: include: a reflective assembly, a zoom lens assembly, and a focus lens assembly, wherein the reflective assembly, the zoom lens assembly, and the focus lens assembly are arranged at intervals along a first direction, and at least one of the reflective assembly, the zoom lens assembly, and the focus lens assembly is capable of moving along the first direction; The optical power of the reflective assembly and the zoom lens assembly is positive, and the optical power of the focus lens assembly is negative; Wherein, the zoom lens assembly is composed of four second lenses, and along the first direction, the four second lenses are lens L1, lens L2, lens L3 and lens L4, the optical focal power of lens L1 is negative, the optical focal power of lens L2 is positive, the optical focal power of lens L3 is negative, and the optical focal power of lens L4 is positive; the focusing lens assembly is composed of three third lenses, and along the first direction, the three third lenses are lens L5, lens L6 and lens L7, the optical focal power of lens L5 is negative, the optical focal power of lens L6 is positive, and the optical focal power of lens L7 is negative; or The zoom lens assembly is composed of five second lenses. Along the first direction, the five second lenses are lens L1, lens L2, lens L3, lens L4 and lens L5, the optical focal power of lens L1 is negative, the optical focal power of lens L2 is positive, the optical focal power of lens L3 is negative, the optical focal power of lens L4 is positive, and the optical focal power of lens L5 is positive. The focusing lens assembly is composed of three third lenses. Along the first direction, the three third lenses are lens L5, lens L6 and lens L7, the optical focal power of lens L5 is negative, the optical focal power of lens L6 is positive, and the optical focal power of lens L7 is positive; There is a first position and a second position between the reflective assembly, the zoom lens assembly and the focus lens assembly; The zoom optical system operates in the first position, the second position, and any position between the first position and the second position. In the first position, the focal length of the zoom optical system is a first focal length. In the second position, the focal length of the zoom optical system is a second focal length. The first focal length and the second focal length satisfy the following conditions: 1.3≤ft÷fw≤2.

5. Wherein, ft is the first focal length, and fw is the second focal length.

2. The zoom optical system according to claim 1, wherein: The focal length of the reflective component is a third focal length, and the first focal length and the third focal length satisfy: f1>2×ft; Wherein, ft is the first focal length, and f1 is the third focal length.

3. The zoom optical system according to claim 2, wherein: The focal length of the zoom lens assembly is a fourth focal length, and the focal length of the focus lens assembly is a fifth focal length; Wherein, the fifth focal length and the fourth focal length satisfy: c <|f3÷f2| <d; Wherein, f2 is the fourth focal length, f3 is the fifth focal length, c is the third threshold, and d is the fourth threshold.

4. The zoom optical system according to claim 1, wherein: Between the first position and the second position, the maximum movement stroke of the zoom lens assembly satisfies: e×(ft-fw) <D1<j×(ft-fw); Wherein, D1 is the moving stroke of the zoom lens assembly, ft is the first focal length, fw is the second focal length, e is a first preset value, and j is a second preset value.

5. The zoom optical system according to claim 1, wherein: Between the first position and the second position, the maximum movement stroke of the focus lens assembly satisfies: g×(ft-fw) <D2<h×(ft-fw); Wherein, D2 is the moving stroke of the focusing lens assembly, ft is the first focal length, fw is the second focal length, g is the third preset value, and h is the fourth preset value.

6. The zoom optical system according to any one of claims 1 to 5, characterized in that: The reflective component comprises: a first prism, the first prism comprising a first incident surface, a first reflecting surface, and a first exiting surface; The optical power of the first prism is positive, and the first exit surface is opposite to the zoom lens assembly.

7. The zoom optical system according to claim 6, wherein: The first incident surface is a convex surface, the first incident surface is an aspherical surface, and the first exit surface is a plane or a concave surface.

8. The zoom optical system according to any one of claims 1 to 5, characterized in that: The reflective component comprises: a second prism, the second prism comprising a second incident surface, a second reflecting surface, and a second exiting surface; a first lens, the first lens being opposite to the second incident surface; The optical power of the first lens is positive, and the second exit surface is opposite to the zoom lens assembly.

9. The zoom optical system according to claim 8, wherein: Both side surfaces of the first lens are aspherical.

10. The zoom optical system according to any one of claims 1 to 5, characterized in that: The zoom lens assembly comprises: At least three second lenses are arranged at intervals along the first direction.

11. The zoom optical system according to any one of claims 1 to 5, characterized in that: The focusing lens assembly comprises: At least two third lenses are arranged at intervals along the first direction.

12. The zoom optical system according to claim 11, wherein: The third lens is an aspherical lens.

13. A lens module, characterized in that: include: The zoom optical system according to any one of claims 1 to 12; a filter, wherein a light incident surface of the filter is opposite to a light exit surface of the zoom optical system; A photosensitive chip is opposite to the light-emitting surface of the filter.

14. The lens module according to claim 13, wherein: Also includes: A driving member is connected to the reflection assembly, the zoom lens assembly and the focus lens assembly, and is used to drive at least one of the reflection assembly, the zoom lens assembly and the focus lens assembly to move along the first direction.

15. An electronic device, characterized in that: include: A mainboard and a lens module as described in claim 13 or 14, wherein the lens module is electrically connected to the mainboard.

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