Zoom imaging lens, imaging device, and electronic device

Abstract

The application discloses a zoom imaging lens, a camera device and an electronic device. The zoom imaging lens (100) comprises a first lens group (11) and a second lens group (12). The first lens group (11) is movable along the optical axis of the zoom imaging lens. The second lens group (12) comprises a liquid lens assembly (121). The liquid lens assembly (121) comprises a fluid (1214) and a diaphragm (1215). The fluid (1214) is wrapped by the diaphragm (1215). The diaphragm (1215) is deformable and light-transmissive. The shape of the diaphragm (1215) changes with external force. When the shape of the diaphragm (1215) changes, the focal length of the liquid lens assembly changes, so that the zoom imaging lens realizes zooming or focusing. The application can reduce the total length, volume and assembly tolerance of the zoom imaging lens, and reduce manufacturing difficulty.

Description

Technical Field

[0001] This disclosure relates to a zoom imaging lens, a camera device, and an electronic device, and more particularly to a zoom imaging lens and camera device suitable for electronic devices such as mobile terminals. Background Technology

[0002] In related technologies, miniaturized zoom imaging lenses mainly adopt a zoom method with multiple lens groups moving. This requires reserving space for each lens group to move, resulting in problems such as a relatively long overall length of the imaging lens, large volume, large assembly tolerance, and manufacturing difficulties. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, the present disclosure provides a zoom imaging lens, a camera device, and an electronic device to reduce the overall length, volume, and assembly tolerance of the zoom imaging lens, thereby reducing manufacturing difficulties.

[0004] According to a first aspect of the present disclosure, a zoom imaging lens is provided, comprising: a first lens group and a second lens group;

[0005] The first lens group is movable along the optical axis of the zoom imaging lens. The second lens group includes a liquid lens assembly, which includes a fluid and a thin film. The fluid is encapsulated by the thin film. The thin film is deformable and transparent. The shape of the thin film can change with external force. When the shape of the thin film changes, the focal length of the liquid lens assembly changes, so as to realize zooming or focusing of the zoom imaging lens.

[0006] In one embodiment, the zoom imaging lens further includes a motor, the motor including a first mover, the motor being configured to drive the first mover to move along an optical axis;

[0007] The liquid lens assembly further includes a second mover, which is fixedly connected to the first mover and can move along the optical axis with the first mover to change the shape of the thin film.

[0008] In one embodiment, the liquid lens assembly further includes a substrate, the substrate including a flat plate portion and an annular barrier, the flat plate portion and the annular barrier forming a receiving space, and the thin film located in the receiving space.

[0009] In one embodiment, the liquid lens assembly further includes a substrate that provides a support surface for the thin film so that the contact portion between the thin film and the support surface does not deform.

[0010] In one embodiment, the first lens group and the second lens group are arranged sequentially from the object side to the image side along the optical axis.

[0011] In one embodiment, the zoom imaging lens further includes a third lens group located on the object side of the first lens group, and the position of the third lens group is fixed.

[0012] In one embodiment, the lateral magnification of the first lens group satisfies the following relationship:

[0013] -2 <beta<-0.5,

[0014] Where beta is the horizontal magnification.

[0015] In one embodiment, the third lens group includes at least one positive diopter lens, which is a solid lens, and the Abbe number of the positive diopter lens is greater than 30.

[0016] In one embodiment, the third lens group further includes at least one negative diopter lens, which is a solid lens and has an Abbe number of less than 40.

[0017] In one embodiment, the second lens group further includes at least one positive diopter lens and one negative diopter lens, both of which are solid lenses.

[0018] In one embodiment, the distance between the vertex of the surface closest to the object side of the third lens group and the image plane on the optical axis is TTL, and the effective image height is IH. The TTL and IH satisfy the following relationship:

[0019] TTL / IH < 30.

[0020] In one embodiment, the Abbe number of the fluid is greater than 40.

[0021] In one embodiment, the zoom imaging lens further includes an aperture located between the first lens group and the second lens group, or located within the second lens group.

[0022] In one embodiment, the aperture F-value of the aperture is F1.5 to F4.5.

[0023] In one embodiment, the zoom imaging lens further includes a steering prism located on the object side of the third lens group. The steering prism is configured to direct light incident along a first direction to the third lens group along a second direction, the first direction being different from the second direction, and the optical axis extending along the second direction.

[0024] In one embodiment, the zoom ratio of the zoom imaging lens is less than 5.

[0025] According to a second aspect of the present disclosure, a camera device is provided, including an image sensor and the above-described zoom imaging lens, wherein the image sensor is located on the imaging surface of the zoom imaging lens.

[0026] According to a third aspect of the present disclosure, an electronic device is provided, including a device body and the above-described camera device, wherein the camera device is mounted on the device body.

[0027] In one embodiment, the electronic device further includes a control module configured to control the position of the first lens group according to a control signal and a preset first correspondence relationship to achieve zooming or focusing, wherein the first correspondence relationship includes the correspondence between the control information of the position of the first lens group and the focal length of the zoom imaging lens, and the control signal includes the focal length information of the zoom imaging lens.

[0028] In one embodiment, the control module is further configured to control the focal length of the liquid lens assembly according to the control signal and a preset second correspondence relationship to achieve zooming or focusing, wherein the second correspondence relationship includes the correspondence between the focal length and imaging distance of the zoom imaging lens and the control information of the focal length of the liquid lens assembly.

[0029] In one embodiment, the electronic device further includes a temperature sensor configured to acquire temperature information of the liquid lens assembly, and the second correspondence further includes a correspondence between the temperature information of the liquid lens assembly and control information of the focal length of the liquid lens assembly when optimally focused at the current temperature.

[0030] In one embodiment, when the zoom imaging lens further includes a steering prism, the first direction is perpendicular to the second direction, and the optical axis extends along the second direction;

[0031] When the short side of the electronic device extends along the second direction, the long side of the electronic device extends along the first direction, or the thickness direction of the electronic device is the first direction;

[0032] When the long side of the electronic device extends along the second direction, the short side of the electronic device extends along the first direction, or the thickness direction of the electronic device is the first direction.

[0033] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: Since the zoom imaging lens includes a liquid lens assembly, which comprises a substrate, a fluid, and a thin film, with the fluid encapsulated by the thin film, and the thin film being deformable and translucent, the shape of the thin film can be changed by external force. When the shape of the thin film changes, the focal length of the liquid lens assembly changes. Thus, when the zoom imaging lens zooms or focuses, the shape of the thin film in the liquid lens assembly can be changed, eliminating the need to move the lens group along a large distance along the optical axis. Therefore, there is no need to reserve a large movement space for the lens group, which can reduce the overall length and volume of the zoom imaging lens. Simultaneously, the number of movable lens groups is reduced, assembly tolerances are decreased, and manufacturing difficulties are lowered.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0036] Figure 1 This is a schematic diagram of the structure of a camera device according to an exemplary embodiment.

[0037] Figure 2 This is a schematic diagram of the structure of another camera device according to an exemplary embodiment.

[0038] Figure 3 This is a schematic diagram of the structure of another camera device according to an exemplary embodiment.

[0039] Figure 4 This is a graph showing spherical aberration, astigmatism curvature, and distortion at the wide-angle end of an imaging lens, according to an exemplary embodiment.

[0040] Figure 5 This is a graph showing spherical aberration, astigmatism curvature, and distortion at the telephoto end of an imaging lens, according to an exemplary embodiment.

[0041] Figure 6 This is a structural block diagram of an electronic device according to an exemplary embodiment.

[0042] Figure 7 This is a schematic diagram of the structure of an electronic device according to an exemplary embodiment.

[0043] Figure 8 This is a schematic cross-sectional view of an electronic device according to an exemplary embodiment. Detailed Implementation

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0045] Figure 1 This is a schematic diagram of a camera device according to an exemplary embodiment. The camera device includes a zoom imaging lens 100 and an image sensor 16. The image sensor 16 is located at the imaging plane 161 of the zoom imaging lens 100. The image sensor 16 receives light incident through the zoom imaging lens 100 and acquires image information.

[0046] like Figure 1 As shown, the imaging lens 100 includes a first lens group 11, a second lens group 12, a third lens group 13, an aperture 14, and a filter 15.

[0047] like Figure 1 As shown, in this embodiment, the third lens group 13, the first lens group 11, the second lens group 12, and the filter 15 are arranged sequentially from the object side to the image side along the optical axis 17 of the imaging lens 100. The aperture 14 is located in the second lens group 12. In other embodiments, the aperture 14 may also be located between the first lens group 11 and the second lens group 12.

[0048] In this embodiment, the position of the third lens group 13 is fixed, and the position of the third lens group 13 can remain unchanged during the zooming or focusing process of the zoom imaging lens 100.

[0049] like Figure 1 As shown, in this embodiment, the third lens group 13 may include a first lens 131 and a second lens 132. The first lens 131 and the second lens 132 are arranged sequentially from the object side to the image side. The first lens 131 is a double-lunar lens with a negative focal length and is a negative diopter lens. The first surface 1311 of the first lens 131 facing the object side is convex, and the second surface 1312 facing the image side is concave. The second lens 132 has a positive focal length and is a positive diopter lens. The third surface 1321 of the second lens 132 facing the object side is convex, and the fourth surface 1322 facing the image side is concave.

[0050] In this embodiment, the Abbe number of the second lens 132 is greater than 30. Preferably, the Abbe number of the second lens 132 is greater than 35. More preferably, the Abbe number of the second lens 132 is greater than 40. The high refractive index of the second lens 132 can increase the radius of curvature of the surface, which is beneficial for reducing spherical aberration.

[0051] In this embodiment, the Abbe number of the first lens 131 is less than 40. Preferably, the Abbe number of the first lens 131 is less than 35. More preferably, the Abbe number of the first lens 131 is less than 30.

[0052] In this embodiment, the first lens 131 and the second lens 132 work together to reduce chromatic aberration.

[0053] In this embodiment, the first lens 131 and the second lens 132 are solid lenses, and specifically spherical lenses. The first lens 131 is made of glass, and the second lens 132 is made of glass. Of course, in other embodiments, the materials of the first lens 131 and the second lens 132 may also be plastic, crystalline, or semiconductor material structural components.

[0054] In this embodiment, the first lens group 11 can move along the optical axis 17. During the zooming or focusing process of the zoom imaging lens 100, the position of the first lens group 11 can be changed to change the focal length of the zoom imaging lens 100.

[0055] like Figure 1 As shown, in this embodiment, the first lens group 11 includes a third lens 111 and a fourth lens 112. The third lens 111 and the fourth lens 112 are arranged sequentially from the object side to the image side. The third lens 111 has a positive focal length and is a positive diopter lens. The fifth surface 1111 of the third lens 111 facing the object side is concave, and the sixth surface 1112 facing the image side is convex. The fourth lens 112 has a negative focal length and is a negative diopter lens. The seventh surface 1121 of the fourth lens 112 facing the object side is concave, and the eighth surface 1122 facing the image side is convex.

[0056] In this embodiment, the third lens 111 and the fourth lens 112 are solid lenses. The material of the third lens 111 is plastic, and the material of the fourth lens 112 is plastic. Of course, in other embodiments, the materials of the third lens 111 and the fourth lens 112 may also be glass, crystal, or semiconductor material structural components.

[0057] In this embodiment, the third lens 111 and the fourth lens 112 are aspherical lenses. The curve equations of the aspherical surfaces of the third lens 111 and the fourth lens 112 are aspherical lenses as follows:

[0058]

[0059] Where X is the concavity of the surface parallel to the optical axis 17, c is the curvature at the extreme point of the surface, r is the perpendicular distance between a point on the aspherical surface and the optical axis 17, K is the conic constant, and A, B, C, D, and E are aspherical coefficients.

[0060] In this embodiment, the lateral magnification of the first lens group 11 satisfies the following relationship:

[0061] -2 <beta<-0.5 (2)

[0062] Where beta is the horizontal magnification.

[0063] In this embodiment, when the lateral magnification of the first lens group 11 satisfies the above-mentioned relationship (2), the focal length and movement of the first lens group 11 can be controlled within a suitable range, which is beneficial to reducing the total length of the zoom imaging lens 100.

[0064] In this embodiment, the ratio of the maximum focal length to the minimum focal length of the zoom imaging lens 100 is the zoom ratio, which is less than 5. This keeps the total length of the zoom imaging lens 100 within a reasonable range, making it suitable for small, portable electronic devices, such as digital cameras and mobile phones.

[0065] like Figure 1 As shown, in this embodiment, during the zooming or focusing process of the zoom imaging lens 100, the second lens group 12 as a whole may not move along the optical axis 17.

[0066] like Figure 1 As shown, in this embodiment, the second lens group 12 may include a liquid lens assembly 121, a fifth lens 122, a sixth lens 123, a seventh lens 124, and an eighth lens 125. The liquid lens assembly 121, the fifth lens 122, the sixth lens 123, the seventh lens 124, and the eighth lens 125 are arranged sequentially from the object side to the image side.

[0067] In this embodiment, as Figure 2 and Figure 3As shown, the liquid lens assembly 121 may include a substrate 1213, a fluid 1214, a thin film 1215, a second mover 1216, a first annular structure 1217, and a second annular structure 1218. The fluid 1214 is encapsulated by the thin film 1215. In this embodiment, the fluid 1214, the thin film 1215, the second mover 1216, and the first annular structure 1217 are located on the object side of the substrate 1213. In other applications, the fluid 1214, the thin film 1215, the second mover 1216, and the first annular structure 1217 may also be located on the image side of the substrate 1213. The substrate 1213 is made of a transparent solid material, such as a glass plate. The first annular structure 1217 is fixed to the object side of the substrate 1213. The material of the first annular structure 1217 may be a metal, but is not limited thereto. The thin film 1215 is transparent and deformable, and is made of an elastic transparent material. The shape of the thin film 1215 may change with the applied external force. The external force can be a pushing force or a pulling force. The thin film 1215 is fixed in the first annular structure 1217, and the substrate 1213 provides a support surface for the thin film 1215. The thin film 1215 includes a contact portion located on the side of the thin film 1215 facing the substrate 1213. This contact portion contacts the support surface of the substrate 1213, which ensures that the contact portion of the thin film 1215 does not deform. The side of the thin film 1215 opposite to the contact portion is in contact with air. A second mover 1216 is fixed to the side of the thin film 1215 opposite to the contact portion. The side of the thin film 1215 opposite to the contact portion undergoes a curvature change under the external force of the second mover 1216. The thin film 1215 also includes an effective light-transmitting region P1. When the radius of curvature of the effective light-transmitting region P1 changes, the focal length of the liquid lens assembly 121 changes. The direction of movement of the second mover 1216 is opposite to the direction of movement of the center of the thin film 1215. The second annular structure 1218 is located on the image side of the substrate 1213. The projection of the inner wall of the second annular structure 1218 onto the substrate 1213 coincides with the projection of the edge of the effective light-transmitting region P1 onto the substrate 1213. The second annular structure 1218 is opaque and can be made of metal. The second annular structure 1218 is used to define the effective light-transmitting region P1 of the thin film 1215.

[0068] It should be noted that the structure of the liquid lens assembly 121 is not limited to the above-described manner. For example, in other embodiments, the substrate may include a flat plate portion and an annular barrier, which may be integrally formed to create a receiving space. The thin film is located in the receiving space and contacts the flat plate portion and the annular barrier, while another portion is in contact with air. The flat plate portion provides a support surface for the thin film to ensure that the contact portion between the thin film and the support surface does not deform. In one possible implementation, when the liquid lens assembly 121 has a negative focal length or a positive focal length, a portion of the thin film is located in the receiving space; when the liquid lens assembly 121 is a planar lens, the entire thin film is located in the receiving space. Furthermore, regarding the second mover 1216, the position of the second mover 1216 can be changed to provide a force in the opposite direction, thereby making the direction of movement of the second mover 1216 the same as the direction of movement of the center of the thin film 1215.

[0069] In this embodiment, as Figure 2 and Figure 3 As shown, the zoom imaging lens 100 also includes a motor 21, which includes a first mover 211 and a stator 212. The first mover 211 and the stator 212 are movably connected, and the motor 21 is configured to drive the first mover 211 to move along the optical axis 17.

[0070] In this embodiment, as Figure 2 and Figure 3 As shown, the second mover 1216 of the liquid lens assembly 121 is fixedly connected to the first mover 211 of the motor 21. For example, the second mover 1216 and the first mover 211 can be glued together, but are not limited thereto. The second mover 1216 can move along the optical axis 17 with the first mover 211 to change the shape of the effective light transmission area P1.

[0071] In this embodiment, the first mover 211 can be a ring, which has a hollow structure, and the cross-section of the hollow portion of the ring can be circular. The second mover 1216 can be a circular tube. The circular tube has a hollow structure, and the cross-section of the hollow portion of the circular tube can be circular. The thickness of the sidewall of the circular tube is greater than the thickness of the sidewall of the ring. The side surface of the ring can be glued to one end face of the circular tube. The connection method between the second mover 1216 and the first mover 211 is not limited to the connection method in this embodiment.

[0072] like Figure 3 As shown, when the first mover 211 of the motor 21 moves along the optical axis 17 toward the image side, it can compress the thin film 1215, causing the fluid 1214 to concentrate toward the center, making the effective light-transmitting area P1 bulge toward the object side, forming a convex surface, and the center of the surface of the thin film in contact with the air changes toward the object side. In this case, the liquid lens assembly 121 has a positive focal length.

[0073] When the first mover 211 of motor 21 moves along the optical axis 17 toward the object side, it stretches the thin film 1215, and the fluid 1214 concentrates toward the edge, causing the effective light-transmitting area P1 to be concave toward the image side, forming a concave surface, and the center of the surface of the thin film in contact with air changes toward the image side. In this case, the liquid lens assembly 121 has a negative focal length.

[0074] It should be noted that in this embodiment, the first mover 211 is directly connected to the second mover 1216. In other embodiments, the first mover 211 may also be indirectly connected to the second mover 1216, depending on the structure of the liquid lens assembly.

[0075] In this embodiment, the Abbe number of fluid 1214 is greater than 40, and the material of fluid 1214 is a low-dispersion material, which can reduce the chromatic aberration caused by the change in focal length of liquid lens assembly 121.

[0076] In this embodiment, as Figure 1 As shown, the shape of the ninth surface 1211 facing the object side of the liquid lens assembly 121 is variable, while the tenth surface 1212 facing the image side is planar. When the shape of the ninth surface 1211 changes, the focal length of the liquid lens assembly 121 changes. During the zooming or focusing process of the zoom imaging lens 100, the focal length of the liquid lens assembly 121 changes, but the position of the liquid lens assembly 121 remains unchanged. In this way, it is not necessary to reserve space for the liquid lens assembly 121 to move along the optical axis, which can reduce the overall length and volume of the zoom imaging lens 100 and simplify the structure of the zoom imaging lens 100. At the same time, the number of movable lens groups is reduced, thereby reducing assembly tolerances and reducing manufacturing difficulties.

[0077] In this embodiment, the fluid 1214 is subjected to an external force, which changes the shape of the effective light-transmitting area P1, thereby changing the focal length of the liquid lens assembly 121. When the zoom imaging lens 100 focuses between infinity and near distance, the position of the first lens group 11 can remain unchanged, and focusing is achieved by changing the focal length of the liquid lens assembly 121.

[0078] In this embodiment, as Figure 1 As shown, the fifth lens 122 has a positive focal length and positive diopter, and is a solid lens. The eleventh surface 1221 of the fifth lens 122 facing the object side is concave, and the twelfth surface 1222 facing the image side is convex.

[0079] In this embodiment, as Figure 1 As shown, the sixth lens 123 has a positive focal length and positive diopter, and is a solid lens. The thirteenth surface 1231 of the sixth lens 123 facing the object side is convex, and the fourteenth surface 1232 facing the image side is convex.

[0080] In this embodiment, as Figure 1 As shown, the seventh lens 124 has a negative focal length and negative diopter, and is a solid lens. The fifteenth surface 1241 of the seventh lens 124 facing the object side is concave, and the sixteenth surface 1242 facing the image side is concave.

[0081] In this embodiment, as Figure 1 As shown, the eighth lens 125 is a solid lens with negative focal length and negative diopter. The seventeenth surface 1251 of the eighth lens 125 facing the object side is convex, and the eighteenth surface 1252 facing the image side is concave.

[0082] In this embodiment, the solid lens material can be glass, plastic, crystal or semiconductor material structural components.

[0083] In this embodiment, as Figure 1 As shown, aperture 14 is located between liquid lens assembly 121 and fifth lens 122, serving as a field stop. Aperture 14 can be a variable aperture or a fixed aperture.

[0084] In this embodiment, the diameter of aperture 14 is determined based on the module's size requirements and specifications such as focal length. The recommended aperture F-number range for the zoom imaging lens is between F1.5 and F4.5. Wherein, aperture F-number = lens focal length / effective lens diameter.

[0085] In this embodiment, the filter 15 is used to filter out infrared and ultraviolet light to prevent infrared and ultraviolet light from interfering with the imaging of the image sensor 16.

[0086] In this embodiment, the zoom imaging lens 100 may further include a steering prism. The steering prism is located on the object side of the third lens group 13 and is configured to direct light incident along a first direction to the third lens group 13 along a second direction. The first direction is different from the second direction, and the optical axis 17 extends along the second direction. In this embodiment, the first direction and the second direction may be perpendicular to each other.

[0087] In this embodiment, as Figure 1 As shown, the distance between the vertex of the object-side surface of the third lens group 13 and the image plane 161 on the optical axis 17 is TTL, and the effective image height is IH. TTL and IH can satisfy the following relationship:

[0088] TTL / IH<30 (3)

[0089] The effective image height is half the total diagonal length of the effective imaging area of ​​the image sensor 16.

[0090] Preferably, TTL and IH can satisfy the following relationship:

[0091] TTL / IH<25 (4)

[0092] When TTL and IH satisfy the relations (3) and (4), the total length of the zoom imaging lens 100 can be limited to a suitable range, which is beneficial for using the zoom imaging lens 100 in portable electronic devices and meeting the miniaturization requirements.

[0093] In this embodiment, the optical structure data of the camera device is shown in Table 1. The aspherical data is shown in Table 2, where K is the conic constant in the aspherical curve equation, and A, B, C, D, and E are the 4th, 6th, 8th, 10th, and 12th order aspherical coefficients of each surface. The positional information corresponding to focusing at infinity (which can be abbreviated as "infinity focusing") is shown in Table 3, and the positional information corresponding to focusing at a distance of 500mm is shown in Table 4.

[0094] Table 1

[0095] TYPE surface R thi Nd Vd EFL flat OBJ inf D0 SPH 1 10.36410 0.48 1.749 25.0 -58.3 SPH 2 8.20860 0.19 SPH 3 8.41410 1.28 1.496 81.6 17.0 SPH 4 1642.53030 d1 ASP 5 -4.09600 1.71 1.675 18.4 40.0 ASP 6 -4.15690 0.50 ASP 7 -3.72930 0.10 1.537 56.4 -9.6 ASP 8 -13.45550 d2 SPH 9 r1 0.40 1.406 99.8 flat 10 inf 0.21 1.52 64.20 flat 11 inf 0.06 STO inf 0.00 ASP 13 4.41270 0.92 1.50 81.56 37.47 ASP 14 5.38370 1.10 ASP 15 4.94070 0.86 1.54 56.33 5.16 ASP 16 -6.07750 0.14 ASP 17 -22.00920 0.44 1.68 18.44 -23.76 ASP 18 59.75440 0.54 ASP 19 16.73050 1.75 1.582 28.21 -8.51 ASP 20 3.67460 5.49 flat 21 inf 0.21 1.52 64.20 flat 22 inf 0.50 flat 23 image -

[0096] In Table 1, "surface" refers to the ordinal numbers of the surfaces arranged sequentially from the object side to the image side. For example, surface 1 is the first surface 1311, surface 2 is the second surface 1312, surface 3 is the third surface 1321, surface 4 is the fourth surface 1322, surface 5 is the fifth surface 1111, surface 6 is the sixth surface 1112, surface 7 is the seventh surface 1121, surface 8 is the eighth surface 1122, surface 9 is the ninth surface 1211, surface 10 is the surface of the substrate 1213 facing the object side (which is planar), and surface 11 is the tenth surface 1212. (STO) For aperture 14, surface 13 is the eleventh surface 1221, surface 14 is the twelfth surface 1222, surface 15 is the thirteenth surface 1231, surface 16 is the fourteenth surface 1232, surface 17 is the fifteenth surface 1241, surface 18 is the sixteenth surface 1242, surface 19 is the seventeenth surface 1251, surface 20 is the eighteenth surface 1252, surface 21 is the nineteenth surface 151 of filter 15 facing the object side, surface 22 is the twentieth surface 152 of filter 15 facing the image side, and surface 23 is the image plane. OBJ is the focusing object surface.

[0097] In Table 1, TYPE represents the surface profile of the lens, ASP represents aspherical, and SPH represents spherical. R is the radius of curvature, and inf is infinity. r1 is the curvature of the ninth surface 1211. thi represents the spacing between two adjacent surfaces. When two adjacent surfaces belong to the same lens, thi is the lens thickness; when two adjacent surfaces do not belong to the same lens, thi is the air gap. D0 is the distance from the focusing object surface to the vertex of the first lens 131 facing the object side. d1 is the air gap between the second lens 132 and the third lens 111, and d2 is the air gap between the fourth lens 112 and the liquid lens assembly 121.

[0098] In Table 1, Nd is the refractive index for the d-line, which represents light with a wavelength of 587.6 nm. Vd is the Abbe number, and EFL is the focal length in millimeters.

[0099] In Table 3, Z1, Z2, and Z3 represent the minimum, intermediate, and maximum focal lengths of the imaging lens 100 when focusing at infinity, respectively, i.e., wide-angle, intermediate, and telephoto states. The intermediate value is a value between the minimum and maximum values, and does not necessarily have to be the median. f is the focal length of the imaging lens 100, Fno is the aperture F-number, and f_LL is the focal length of the liquid lens assembly 121.

[0100] Table 4 shows the focal length of the imaging lens 100 and the position status information of the first and second lens groups when focusing at a distance of 500mm for the three focal length states Z1, Z2, and Z3 mentioned above.

[0101] Table 2

[0102] surface K A B C D E 5 2.57249E-01 6.69762E-03 -2.28449E-04 2.93040E-05 8.83828E-07 -2.26707E-07 6 0.00000E+00 4.09162E-03 -3.30892E-04 8.08947E-05 -4.20073E-06 7 0.00000E+00 3.52669E-03 5.42450E-05 1.11718E-04 -8.52973E-06 8 0.00000E+00 1.92378E-03 3.61484E-04 -2.49817E-05 6.11402E-07 13 0.00000E+00 -2.14578E-03 -2.91772E-04 -3.39852E-05 -6.41805E-06 14 0.00000E+00 -1.51271E-03 -3.59897E-04 -6.29605E-05 -7.88621E-06 4.42414E-07 15 2.96546E-02 -1.30453E-04 -3.65656E-05 -1.62141E-05 1.55191E-06 5.11989E-07 16 0.00000E+00 2.97126E-03 -2.19289E-04 1.46025E-05 4.23715E-06 17 0.00000E+00 7.14912E-05 1.66682E-05 9.37416E-07 0.00000E+00 18 0.00000E+00 7.41899E-05 -1.36420E-04 6.77780E-06 1.80879E-06 19 0.00000E+00 -8.99083E-04 -7.23092E-04 2.57785E-05 4.69084E-06 20 -3.04221E-02 -5.73391E-05 -1.71729E-04 -7.35153E-05 1.56026E-05 6.27521E-15

[0103] Table 3

[0104]

[0105] Table 4

[0106]

[0107] In this embodiment, the spherical aberration, astigmatism, field curvature, and distortion curves at the wide-angle end of the imaging lens 100 are shown in the figure below. Figure 4 As shown. Figure 4 In the spherical aberration curve, the horizontal axis represents the focal offset in millimeters, and the vertical axis represents the longitudinal spherical aberration in millimeters. Figure 4In the pixel and field curvature curves, the horizontal axis represents the focus offset in millimeters, and the vertical axis represents the image height (IMG HT) in millimeters. S and T represent the sagittal and meridional directions, respectively. Both contain distribution curves for 470nm, 587.6nm, and 656nm, centered at 587.6nm. Figure 4 In the distortion distribution curve, the horizontal axis represents the distortion rate, and the vertical axis represents the image height, with the unit being millimeters.

[0108] In this embodiment, the spherical aberration, astigmatism, field curvature, and distortion curves at the telephoto end of the imaging lens 100 are shown in the figure below. Figure 5 As shown.

[0109] This disclosure also provides a camera device that includes the zoom imaging lens 100 described in any of the above embodiments.

[0110] An exemplary embodiment of this disclosure also provides an electronic device. The electronic device includes a device body and a camera device from any of the above embodiments, the camera device being mounted on the device body.

[0111] In this embodiment, the electronic device can be a miniaturized electronic device such as a digital camera, mobile phone, drone, or monitor.

[0112] In this embodiment, as Figure 6 As shown, in addition to the camera device 1002, the electronic device 1000 may also include a control module 1004, a storage module 1006, and a transmission module 1008.

[0113] In this embodiment, the control module 1004 is configured to control the zoom and focus movements of the zoom imaging lens 100. For example, the focal length of the zoom imaging lens 100 can be controlled by controlling the position of the first lens group 11 and the focal length of the liquid lens assembly 121.

[0114] In this embodiment, the control module 1004 is configured to control the position of the first lens group 11 according to the control signal and the first correspondence relationship, so as to achieve zooming or focusing. The first correspondence relationship is the correspondence between the control information of the position of the first lens group 11 and the focal length of the zoom camera lens imaging lens 100. The control signal can be generated according to the control command input by the user, including the focal length information of the zoom imaging lens.

[0115] In this embodiment, the control module 1004 further includes a temperature sensor and a distance sensor. The temperature sensor is configured to acquire temperature information of the liquid lens assembly 121, and the distance sensor is configured to detect the imaging distance, which is the distance between the image sensor 16 and the object being photographed. The distance sensor can be a TOF (Time of Flight) sensor or an infrared distance sensor, but is not limited to these. The control module 1004 is also configured to control the focal length of the liquid lens assembly 121 based on a control signal, the acquired temperature information of the liquid lens assembly 121, the detected imaging distance, and a second correspondence, to achieve assisted zooming and focusing. The second correspondence includes the correspondence between the focal length of the zoom imaging lens 100, the imaging distance, the temperature information of the liquid lens assembly 121, and the control information of the focal length of the liquid lens assembly at the optimal focusing temperature under the current conditions. In this embodiment, back focus changes and focus point drift caused by temperature variations can be compensated, thereby expanding the usable temperature range of the electronic device.

[0116] It should be noted that the temperature sensor and the distance sensor can be components of the control module 1004, or they can be devices independent of the control module 1004.

[0117] In this embodiment, the storage module 1006 is configured to store image information acquired by the camera device 1002. The storage module 1006 may be onboard memory, such as flash memory, but is not limited thereto.

[0118] In this embodiment, the transmission module 1008 is configured to transmit image information captured by the camera device 1002. The transmission module 1008 can use one or more connections, such as a USB interface, an Ethernet interface, or a Bluetooth wireless connection, but is not limited thereto.

[0119] In this embodiment, as Figure 7 As shown, the thickness direction of the electronic device 1000 extends along the first direction H, the short side of the electronic device 1000 extends along the second direction W, and the long side of the electronic device 1000 extends along the third direction L. The first direction H, the second direction W, and the third direction L are perpendicular to each other. Figures 7-8 As shown, the optical axis 17 of the zoom imaging lens 100 extends along the second direction W. In this way, the electronic device can provide relatively ample space for the zoom imaging lens 100, so that the zoom imaging lens 100 is no longer limited by the size of the electronic device when focusing or zooming.

[0120] like Figure 8As shown, light is incident on the glass cover plate 1010 along the first direction H, and the light passing through the glass cover plate 1010 is incident on the camera device 1002 along the first direction H. Specifically, the light passing through the glass cover plate 1010 is incident on the steering prism along the first direction H, and the steering prism directs the incident light to the third lens group 13 along the second direction W. The light emitted from the third lens group 13 passes through the first lens group 11, the second lens group 12 and the filter 15 in sequence, and finally enters the image sensor 16.

[0121] In another embodiment, when the short side of the electronic device 1000 extends along the second direction, the long side of the electronic device 1000 may extend along the first direction. In yet another embodiment, when the long side of the electronic device 1000 extends along the second direction, the short side of the electronic device 1000 may extend along the first direction, or the thickness direction of the electronic device 1000 is the first direction.

[0122] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0123] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A zoom imaging lens characterized by comprising, in order from the object, Comprising: a first lens group, a second lens group and a third lens group; the first lens group is movable along an optical axis of the zoom imaging lens, the second lens group comprises a liquid lens assembly, the liquid lens assembly comprises a fluid and a membrane, the fluid is wrapped by the membrane; the membrane is deformable and transmissive, the shape of the membrane can be changed by external force, the focal length of the liquid lens assembly changes when the shape of the membrane changes, so as to realize zooming or focusing of the zoom imaging lens; the first lens group and the second lens group are arranged in order from an object side to an image side; the third lens group is located on the object side of the first lens group, and the position of the third lens group is fixed; the distance between the surface vertex of the object side of the third lens group and the image plane on the optical axis is TTL, and the effective image height is IH, and the TTL and the IH satisfy the following relationship: TTL / IH<30.

2. The zoom imaging lens of claim 1, wherein, Further comprising a motor, the motor comprises a first mover, and the motor is configured to drive the first mover to move along the optical axis; the liquid lens assembly further comprises a second mover, the second mover is fixedly connected with the first mover and is movable along the optical axis with the first mover, so as to change the shape of the membrane.

3. The zoom imaging lens of claim 1, wherein The liquid lens assembly further comprises a substrate, the substrate comprises a flat plate part and an annular retaining wall, the flat plate part and the annular retaining wall form an accommodation space, and the membrane is located in the accommodation space.

4. The zoom imaging lens of claim 1, wherein, The liquid lens assembly further comprises a substrate, the substrate provides a bearing surface for the membrane, so that the contact part of the membrane and the bearing surface is not deformed.

5. The zoom imaging lens of claim 1, wherein, The lateral magnification of the first lens group satisfies the following relationship: -2<beta<-0.5, wherein beta is the lateral magnification.

6. The zoom imaging lens of claim 1, wherein The third lens group comprises at least one positive refractive power lens, the positive refractive power lens is a solid lens, and the Abbe number of the positive refractive power lens is greater than 30.

7. The zoom imaging lens of claim 1, wherein, The third lens group further comprises at least one negative refractive power lens, the negative refractive power lens is a solid lens, and the Abbe number of the negative refractive power lens is less than 40.

8. The zoom imaging lens of claim 1, wherein, The second lens group further comprises at least one positive refractive power lens and one negative refractive power lens, and the positive refractive power lens and the negative refractive power lens are both solid lenses.

9. The zoom imaging lens of claim 1, wherein, The Abbe number of the fluid is greater than 40.

10. The zoom imaging lens of claim 1, wherein, Further comprising an aperture, the aperture is located between the first lens group and the second lens group, or in the second lens group.

11. The zoom imaging lens of claim 10, wherein, The aperture value of the aperture is F1.5-F4.

5.

12. The zoom imaging lens of claim 1, wherein, Further comprising a turning prism, the turning prism is located on the object side of the third lens group, and the turning prism is configured to emit light incident along a first direction along a second direction to the third lens group, the first direction and the second direction are different, and the optical axis extends along the second direction.

13. The zoom imaging lens of claim 1, wherein, The zoom ratio of the zoom imaging lens is less than 5.

14. An image pickup device, characterized by comprising: Comprising an image sensor and the zoom imaging lens according to any one of claims 1-13, and the image sensor is located on the imaging plane of the zoom imaging lens.

15. An electronic device, comprising: Comprising a device body and the camera device according to claim 14, and the camera device is assembled on the device body.

16. The electronic device of claim 15, wherein, The control module is further configured to control the focal length of the liquid lens assembly according to the control signal and a preset second correspondence relationship to realize zooming or focusing, wherein the second correspondence relationship comprises a correspondence relationship among control information of the focal length of the zoom imaging lens, an imaging distance and the focal length of the liquid lens assembly.

17. The electronic device of claim 16, wherein, The control module is further configured to control the focal length of the liquid lens assembly according to the control signal and a preset second correspondence relationship to realize zooming or focusing, wherein the second correspondence relationship comprises a correspondence relationship among control information of the focal length of the zoom imaging lens, an imaging distance and the focal length of the liquid lens assembly.

18. The electronic device of claim 17, wherein, The temperature sensor is configured to acquire temperature information of the liquid lens assembly, and the second correspondence relationship further comprises a correspondence relationship between the temperature information of the liquid lens assembly and control information of the focal length of the liquid lens assembly at an optimal focusing time under a current temperature.

19. The electronic device of claim 15, wherein, When the zoom imaging lens further comprises a turning prism, the first direction is perpendicular to the second direction, and the optical axis extends along the second direction; When a short side of the electronic device extends along the second direction, a long side of the electronic device extends along the first direction, or a thickness direction of the electronic device is the first direction; When a long side of the electronic device extends along the second direction, a short side of the electronic device extends along the first direction, or a thickness direction of the electronic device is the first direction.

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