WO2023010350A1 - 变焦成像镜头、摄像装置及电子设备 - Google Patents

变焦成像镜头、摄像装置及电子设备 Download PDF

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Publication number
WO2023010350A1
WO2023010350A1 PCT/CN2021/110637 CN2021110637W WO2023010350A1 WO 2023010350 A1 WO2023010350 A1 WO 2023010350A1 CN 2021110637 W CN2021110637 W CN 2021110637W WO 2023010350 A1 WO2023010350 A1 WO 2023010350A1
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WIPO (PCT)
Prior art keywords
lens
zoom imaging
lens group
imaging lens
electronic device
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PCT/CN2021/110637
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English (en)
French (fr)
Inventor
陈永华
郑严
杨宗保
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北京小米移动软件有限公司
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2021/110637 priority Critical patent/WO2023010350A1/zh
Priority to CN202180002155.7A priority patent/CN116134345A/zh
Publication of WO2023010350A1 publication Critical patent/WO2023010350A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • the present disclosure relates to a zoom imaging lens, an imaging device, and electronic equipment, and in particular, relates to a zoom imaging lens and an imaging device suitable for electronic equipment such as a mobile terminal.
  • the miniaturized zoom imaging lens mainly uses multiple lens groups to move and zoom, and it is necessary to reserve a moving space for each lens group, which has the problems of relatively long overall length, large volume, large assembly tolerance, and difficult manufacturing.
  • the disclosure provides a zoom imaging lens, an imaging device and electronic equipment.
  • a zoom imaging lens including: a first lens group and a second lens group;
  • the first lens group can move along the optical axis of the zoom imaging lens
  • the second lens group includes a liquid lens assembly
  • the liquid lens assembly includes a fluid and a film, and the fluid is wrapped by the film
  • the film is deformable and transparent, and the shape of the film can change with external force.
  • the focal length of the liquid lens assembly changes, so as to realize the zooming or focusing of the zoom imaging lens.
  • the zoom imaging lens further includes a motor, the motor includes a first mover, and the motor is configured to drive the first mover to move along the optical axis;
  • the liquid lens assembly also 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 thickness of the film. shape.
  • the liquid lens assembly further includes a substrate, and the substrate includes a flat plate portion and an annular retaining wall, the flat plate portion and the annular retaining wall form an accommodating space, and the film is located in the accommodating space.
  • the liquid lens assembly further includes a substrate, and the substrate provides a bearing surface for the thin film, so that the contact portion between the thin film and the bearing surface is not deformed.
  • the first lens group and the second lens group are arranged sequentially along the optical axis from the object side to the image side.
  • the zoom imaging lens further includes a third lens group, 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 lateral magnification of the first lens group satisfies the following relationship:
  • beta is the horizontal magnification.
  • the third lens group includes at least one positive diopter lens, the positive diopter lens is a solid lens, and the Abbe number of the positive diopter lens is greater than 30.
  • the third lens group further includes at least one negative diopter lens, the negative diopter lens is a solid lens, and the Abbe number of the negative diopter lens is less than 40.
  • the second lens group further includes at least one positive diopter lens and one negative diopter lens, both of the positive diopter lens and the negative diopter lens are solid lenses.
  • the distance between the surface vertex of the third lens group closest to the object side 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:
  • the fluid has an Abbe number greater than 40.
  • the zoom imaging lens further includes an aperture, and the aperture is located between the first lens group and the second lens group, or in the second lens group.
  • the aperture F value of the aperture is F1.5 ⁇ F4.5.
  • the zoom imaging lens further includes a turning prism, the turning prism is located on the object side of the third lens group, and the turning prism is configured to turn light incident along the first direction along the second The first direction is different from the second direction, and the optical axis extends along the second direction.
  • the zoom ratio of the zoom imaging lens is less than 5.
  • an imaging device including an image sensor and the above zoom imaging lens, the image sensor is located on an imaging plane of the zoom imaging lens.
  • an electronic device including a device body and the above-mentioned camera device, where the camera device is assembled on the device body.
  • the electronic device further includes a control module, the control module is configured to control the position of the first lens group according to the first correspondence between the control signal and the preset, so as to realize zooming or focusing, wherein
  • the first correspondence includes a correspondence between control information on the position of the first lens group and a focal length of the zoom imaging lens, and the control signal includes information on the focal length of the zoom imaging lens.
  • control module is further configured to control the focal length of the liquid lens assembly according to the control signal and a preset second corresponding relationship to achieve zooming or focusing, wherein the second corresponding relationship
  • the control information includes the focal length of the zoom imaging lens, the imaging distance, and the focal length of the liquid lens assembly.
  • the electronic device further includes a temperature sensor, the temperature sensor is configured to obtain the temperature information of the liquid lens assembly, and the second corresponding relationship further includes the temperature information of the liquid lens assembly and the temperature information at the current temperature.
  • the zoom imaging lens when the zoom imaging lens further includes a turning prism, the first direction is perpendicular to the second direction, and the optical axis extends along the second direction;
  • the short side of the electronic device extends along the second direction
  • the long side of the electronic device extends along the first direction
  • the thickness direction of the electronic device is the first direction
  • the long side of the electronic device extends along the second direction
  • the short side of the electronic device extends along the first direction
  • the thickness direction of the electronic device is the first direction
  • Fig. 1 is a schematic structural diagram of an imaging device according to an exemplary embodiment.
  • Fig. 2 is a schematic structural diagram of another camera device according to an exemplary embodiment.
  • Fig. 3 is a schematic structural diagram of another camera device according to an exemplary embodiment.
  • Fig. 4 is a graph showing spherical aberration, astigmatism field curvature and distortion at the wide-angle end of an imaging lens according to an exemplary embodiment.
  • Fig. 5 is a graph showing spherical aberration, astigmatism field curvature and distortion at the telephoto end of an imaging lens according to an exemplary embodiment.
  • Fig. 6 is a structural block diagram of an electronic device according to an exemplary embodiment.
  • Fig. 7 is a schematic structural diagram of an electronic device according to an exemplary embodiment.
  • Fig. 8 is a schematic cross-sectional view of an electronic device according to an exemplary embodiment.
  • Fig. 1 is a schematic structural diagram of an imaging 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 surface 161 of the zoom imaging lens 100 .
  • the image sensor 16 receives light incident through the zoom imaging lens 100 and collects image information.
  • 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 .
  • the third lens group 13 , the first lens group 11 , the second lens group 12 and the filter 15 are arranged in sequence from the object side to the image side along the optical axis 17 of the imaging lens 100 .
  • An 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 .
  • the position of the third lens group 13 is fixed, and the position of the third lens group 13 may remain unchanged during the process of zooming or focusing of the zoom imaging lens 100 .
  • 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 bilunar lens with a negative focal length and a negative diopter.
  • 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.
  • the Abbe number of the second lens 132 is greater than 30.
  • the Abbe number of the second lens 132 is greater than 35.
  • the Abbe number of the second lens 132 is greater than 40.
  • the refractive index of the second lens 132 is relatively high, which can increase the curvature radius of the curved surface, which is beneficial to reduce spherical aberration.
  • the Abbe number of the first lens 131 is less than 40.
  • the Abbe number of the first lens 131 is less than 35.
  • the Abbe number of the first lens 131 is less than 30.
  • the first lens 131 cooperates with the second lens 132, which is beneficial to reduce the color difference.
  • the first lens 131 and the second lens 132 are solid lenses and spherical lenses.
  • the material of the first lens 131 is glass, and the material of the second lens 132 is glass.
  • the material of the first lens 131 and the material of the second lens 132 may also be plastic, crystal or semiconductor material structural components.
  • the first lens group 11 can move along the optical axis 17 .
  • the position of the first lens group 11 can be changed to change the focal length of the zoom imaging lens 100 .
  • 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.
  • 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.
  • the material of the third lens 111 and the material of the fourth lens 112 may also be glass, crystal or semiconductor material structural components.
  • the third lens 111 and the fourth lens 112 are aspheric lenses.
  • the curve equations of the aspheric surfaces of the third lens 111 and the fourth lens 112 are as follows:
  • X is the concavity of the curved surface parallel to the optical axis 17
  • c is the curvature at the pole of the curved surface
  • r is the vertical distance between the point on the aspheric surface and the optical axis 17
  • K is the conic constant
  • A, B, C, D , E is the aspheric coefficient.
  • the lateral magnification of the first lens group 11 satisfies the following relationship:
  • beta is the horizontal magnification.
  • the focal length and movement amount of the first lens group 11 can be controlled within an appropriate range, which is beneficial to reduce the size of the zoom imaging lens. 100 total length.
  • the ratio of the maximum focal length to the shortest focal length of the zoom imaging lens 100 is the zoom ratio, and the zoom ratio is less than five. In this way, the total length of the zoom imaging lens 100 can be kept within a reasonable range, which can be applied to compact and portable electronic devices, such as digital cameras and mobile phones.
  • the second lens group 12 may not move along the optical axis 17 as a whole.
  • 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.
  • 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 .
  • Fluid 1214 is surrounded by membrane 1215 .
  • the fluid 1214 , the film 1215 , the second mover 1216 and the first annular structure 1217 are located on the object side of the substrate 1213 .
  • the fluid 1214 , the film 1215 , the second mover 1216 and the first annular structure 1217 can also be located on the image side of the substrate 1213 .
  • the material of the substrate 1213 is a transparent solid material, such as a glass plate.
  • the first ring structure 1217 is fixed on the object side of the substrate 1213, and the material of the first ring structure 1217 can be a metal material, but not limited thereto.
  • the film 1215 is transparent and deformable, and the material is an elastic transparent material. The shape of the thin film 1215 can change according to the external force received. Wherein, the external force may be pushing force or pulling force.
  • the film 1215 is fixed in the first annular structure 1217 , and the substrate 1213 provides a supporting surface for the film 1215 .
  • the film 1215 includes a contact portion located on the side of the film 1215 facing the substrate 1213 , the contact portion is in contact with the abutment surface of the substrate 1213 , and the abutment surface of the substrate 1213 is used to ensure that the contact portion of the film 1215 does not deform.
  • the side of the film 1215 opposite to the contact portion is in contact with air.
  • the second mover 1216 is fixed on a side of the film 1215 opposite to the contact portion. The curvature of the side of the film 1215 opposite to the contact portion changes under the action of the external force of the second mover 1216 .
  • the thin film 1215 also includes an effective light-passing area P1, and when the radius of curvature of the effective light-passing area P1 changes, the focal length of the liquid lens assembly 121 changes.
  • the moving direction of the second mover 1216 is opposite to the moving direction of the center of the film 1215 .
  • the second ring structure 1218 is located on the image side of the substrate 1213 , and the projection of the inner wall of the second ring structure 1218 on the substrate 1213 coincides with the projection of the edge of the effective light-transmitting area P1 on the substrate 1213 .
  • the second ring structure 1218 is opaque, and the material can be metal.
  • the second ring structure 1218 is used to define the effective light-transmitting area P1 of the film 1215 .
  • the structure of the liquid lens assembly 121 is not limited to the above manner.
  • the base plate may include a flat plate portion and an annular retaining wall, and the flat plate portion and the annular retaining wall may be integrally formed to form an accommodating space.
  • the film is located in the accommodation space and is in contact with the flat plate part and the annular retaining wall, and the other part is in contact with the air.
  • the flat part provides a supporting surface for the film, so as to ensure that the contact part between the film and the supporting surface does not deform.
  • the liquid lens assembly 121 when the liquid lens assembly 121 has a negative focal length or a positive focal length, a part of the film is located in the accommodating space, and when the liquid lens assembly 121 is a planar lens, the entire film is located in the accommodating space.
  • the position of the second mover 1216 can be changed to provide a force in the opposite direction, so that the movement direction of the second mover 1216 is the same as that of the center of the film 1215 .
  • the zoom imaging lens 100 further includes a motor 21, the motor 21 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 It is configured to drive the first mover 211 to move along the optical axis 17 .
  • 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 is connected to the first mover 211 Glued connections are possible, but not limited to.
  • the second mover 1216 can move along with the first mover 211 along the optical axis 17 to change the shape of the effective light-transmitting area P1.
  • the first mover 211 may be a ring, the ring is hollow, and the cross section of the hollow portion of the ring may be circular.
  • the second mover 1216 can be a circular tube.
  • the circular tube is a hollow structure, and the cross section of the hollow part of the circular tube can be circular.
  • the thickness of the side wall of the circular tube is greater than the thickness of the side wall of the ring.
  • the side circular surface of the ring can be glued and connected with an end surface of the circular pipe.
  • the connection method between the second mover 1216 and the first mover 211 is not limited to the connection method in this embodiment.
  • the liquid lens assembly 121 has a positive focal length.
  • the film 1215 can be stretched, and the fluid 1214 is concentrated toward the edge direction, so that the effective light-transmitting area P1 is sunken toward the image side, forming a concave surface, which is in contact with the air
  • the surface center of the film in contact changes toward the image side.
  • the liquid lens assembly 121 has a negative focal length.
  • first mover 211 is directly connected to the second mover 1216, and 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.
  • the Abbe number of the fluid 1214 is greater than 40, and the material of the fluid 1214 is a low dispersion material, which can reduce the change of chromatic aberration caused by the change of the focal length of the liquid lens assembly 121 .
  • the shape of the ninth surface 1211 facing the object side of the liquid lens assembly 121 is variable, and the tenth surface 1212 facing the image side is a plane.
  • the focal length of the liquid lens assembly 121 changes.
  • the focal length of the liquid lens assembly 121 changes, but the position of the liquid lens assembly 121 may not change. In this way, there is no need to reserve a moving space for the liquid lens assembly 121 along the optical axis, the overall length and volume of the zoom imaging lens 100 can be reduced, and the structure of the zoom imaging lens 100 can be simplified.
  • the number of movable lens groups is reduced, thereby reducing assembly tolerances and reducing manufacturing difficulties.
  • the fluid 1214 is acted by an external force, and changing the shape of the effective light-transmitting area P1 can change the focal length of the liquid lens assembly 121 .
  • the zoom imaging lens 100 focuses between infinity and short distance, the position of the first lens group 11 can remain unchanged, and the focus can be realized by changing the focal length of the liquid lens assembly 121 .
  • the fifth lens 122 has a positive focal length and a 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.
  • the sixth lens 123 has a positive focal length and a 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.
  • the seventh lens 124 has 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.
  • 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.
  • the material of the solid lens can be glass, plastic, crystal or semiconductor material structural components.
  • the aperture 14 is located between the liquid lens assembly 121 and the fifth lens 122 , and functions as a field stop.
  • the aperture 14 can be a variable aperture or a fixed aperture.
  • the diameter of the aperture 14 is determined according to the size requirements of the module and specifications such as focal length.
  • the recommended range of the aperture F value of the zoom imaging lens is between F1.5-F4.5.
  • the aperture F value the focal length of the lens / the effective aperture diameter of the lens.
  • the filter 15 is used to filter out the infrared light and the ultraviolet light, so as to prevent the infrared light and the ultraviolet light from interfering with the imaging of the image sensor 16 .
  • the zoom imaging lens 100 may further include a turning prism.
  • the turning prism is located on the object side of the third lens group 13, and the turning prism is configured to emit the light incident along the first direction to the third lens group 13 along the second direction, the first direction is different from the second direction, and the optical axis 17 is along the The second direction extends.
  • the first direction and the second direction may be perpendicular to each other.
  • TTL the distance between the vertex of the surface of the third lens group 13 facing the object side and the image plane 161 on the optical axis 17
  • IH the effective image height
  • the effective image height is half of the total diagonal length of the effective imaging area of the image sensor 16 .
  • TTL and IH can satisfy the following relationship:
  • the total length of the zoom imaging lens 100 can be limited in an appropriate range, which is conducive to using the zoom imaging lens 100 for portable electronic devices to meet miniaturization Require.
  • the optical structure data of the imaging device is shown in Table 1.
  • the aspheric surface data are shown in Table 2, where K is the conic constant in the aspheric surface curve equation, and A, B, C, D, and E are the 4th, 6th, 8th, 10th, and 12th order aspheric coefficients of each surface.
  • Table 3 shows the corresponding position information when focusing at infinity distance (may be referred to as "infinity focusing"), and the corresponding position information when focusing at a distance of 500 mm can be shown in Table 4.
  • surface is the ordinal number of surfaces arranged in sequence from the object side to the image side.
  • the surface with surface 1 is the first surface 1311
  • the surface with surface 2 is the second surface 1312
  • the surface with surface 3 is the second surface.
  • Three surfaces 1321, the surface whose surface is 4 is the fourth surface 1322, the surface whose surface is 5 is the fifth surface 1111, the surface whose surface is 6 is the sixth surface 1112, the surface whose surface is 7 is the seventh surface 1121, and the surface is The surface of 8 is the eighth surface 1122, the surface of surface 9 is the ninth surface 1211
  • the surface of surface 10 is the surface of the substrate 1213 facing the object side, which is a plane
  • the surface of surface 11 is the tenth surface 1212
  • STO is The aperture is 14, the surface whose surface is 13 is the eleventh surface 1221 , the surface whose surface is 14 is the twelfth surface 1222 , the surface whose surface is 15 is the thirteenth surface 1231 , and the surface whose surface
  • TYPE is the surface type of the lens
  • ASP is aspherical
  • SPH is spherical
  • R is the radius of curvature
  • inf is infinite
  • r1 is the curvature of the ninth surface 1211 .
  • thi represents the interval between two adjacent surfaces. When two adjacent surfaces belong to the same lens, thi is the thickness of the lens; when two adjacent surfaces do not belong to the same lens, thi is the air gap.
  • D0 is the distance from the focusing object plane 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
  • d2 is the air gap between the fourth lens 112 and the liquid lens assembly 121 .
  • Nd is the refractive index for the d-line
  • the d-line is light with a wavelength of 587.6 nm
  • Vd is the Abbe number
  • EFL is the focal length in millimeters.
  • Z1, Z2, and Z3 are the focusing states of the imaging lens 100 with the minimum, intermediate, and maximum focal lengths when focusing at an infinite distance, respectively, that is, the wide-angle, intermediate, and telephoto states, respectively.
  • the median value is a value between the minimum value and the maximum value, not necessarily the median value.
  • f is the focal length of the imaging lens 100
  • Fno is the F value of the aperture
  • f_LL is the focal length of the liquid lens assembly 121 .
  • Table 4 shows the focal length of the imaging lens 100 corresponding to the above-mentioned three focal length states of Z1, Z2, and Z3 when focusing at a distance of 500 mm, and the position status information of the first lens group and the second lens group.
  • the spherical aberration, astigmatism, field curvature (ASTIGMATIC FIELD CURVES) and distortion (DISTORTION) curves of the wide-angle end of the imaging lens 100 are shown in FIG. 4 .
  • the horizontal axis is the focal point (FOCUS) offset
  • the unit is millimeter (MILLIMETERS)
  • the vertical axis is the longitudinal spherical aberration (LONGITUDINAL SPHERICAL ABER.)
  • the unit is millimeter.
  • the horizontal axis is the focus offset, and the unit is mm
  • the vertical axis is the image height (IMG HT), and the unit is mm.
  • S and T represent the sagittal and meridional directions, respectively. Both contain distribution curves at 470nm, 587.6nm and 656nm, centered at 587.6nm.
  • the horizontal axis is the distortion rate
  • the vertical axis is the image height
  • the unit is mm.
  • the spherical aberration, astigmatism, field curvature (ASTIGMATIC FIELD CURVES) and distortion (DISTORTION) curves of the telephoto end of the imaging lens 100 are shown in FIG. 5 .
  • Embodiments of the present disclosure further provide an imaging device, which includes the zoom imaging lens 100 described in any one of the above embodiments.
  • An exemplary embodiment of the present disclosure also provides an electronic device.
  • the electronic device includes a device body and the camera device of any one of the above embodiments, and the camera device is assembled on the device body.
  • the electronic device may be a miniaturized electronic device such as a digital camera, a mobile phone, a drone, or a monitor.
  • the electronic device 1000 may further include a control module 1004 , a storage module 1006 and a transmission module 1008 in addition to the camera 1002 .
  • control module 1004 is configured to control the zooming and focusing movement 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 .
  • the control module 1004 is configured to control the position of the first lens group 11 according to the first corresponding relationship between the control signal, so as to realize zooming or focusing.
  • the first correspondence is the correspondence between the control information of the position of the first lens group 11 and the focal length of the zoom imaging lens 100 .
  • the above-mentioned control signal may be generated according to a control command input by the user, including information about the focal length of the zoom imaging lens.
  • the control module 1004 also includes a temperature sensor and a distance sensor.
  • the temperature sensor is configured to acquire temperature information of the liquid lens assembly 121
  • the distance sensor is configured to detect the imaging distance, which is the distance between the image sensor 16 and the object to be photographed.
  • the distance sensor can be a TOF (Time of flight, time of flight) sensor or an infrared distance sensor, but is not limited thereto.
  • the control module 1004 is further configured to control the focal length of the liquid lens assembly 121 according to the control signal, the acquired temperature information of the liquid lens assembly 121 and the detected imaging distance and the second corresponding relationship, so as to realize auxiliary 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 best focus at the current temperature.
  • back focus changes and focus point drift caused by temperature changes can be compensated, thereby expanding the usable temperature range of electronic equipment.
  • the temperature sensor and the distance sensor may be components of the control module 1004 , or devices independent of the control module 1004 .
  • the storage module 1006 is configured to store image information collected by the camera device 1002 .
  • the storage module 1006 may be an onboard memory, such as flash memory, but is not limited thereto.
  • the transmission module 1008 is configured to transmit the image information collected by the camera device 1002 .
  • the transmission module 1008 may use one or more connections, such as, but not limited to, a USB interface, an Ethernet interface, or a Bluetooth wireless connection.
  • 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
  • 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.
  • the optical axis 17 of the zoom imaging lens 100 extends along the second direction W.
  • the electronic device can provide a relatively sufficient 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.
  • the light is incident on the glass cover 1010 along the first direction H, and the light passing through the glass cover 1010 is incident on the imaging device 1002 along the first direction H, specifically, the light passing through the glass cover 1010 is along the
  • the first direction H is incident to the turning prism, and the turning prism emits the incident light along the second direction W to the third lens group 13, and the light emitted from the third lens group 13 passes through the first lens group 11 and the second lens group in sequence 12 and filter 15, and finally enter the image sensor 16.
  • the long side of the electronic device 1000 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.

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  • Lens Barrels (AREA)

Abstract

一种变焦成像镜头、摄像装置及电子设备，变焦成像镜头(100)包括：第一透镜组(11)与第二透镜组(12)；第一透镜组(11)可沿变焦成像镜头(100)的光轴移动，第二透镜组(12)包括液态透镜组件(121)，液态透镜组件(121)包括流体(1214)与薄膜(1215)，流体(1214)被薄膜(1215)包裹；薄膜(1215)可变形以及可透光，薄膜(1215)的形状会随着外力变化，薄膜(1215)的形状改变时液态透镜组件(121)的焦距改变，以实现变焦或对焦。本方案可以减小变焦成像镜头的总长、体积以及组装公差，降低制造困难。

Description

变焦成像镜头、摄像装置及电子设备 技术领域
本公开是关于一种变焦成像镜头、摄像装置及电子设备，尤其是关于一种适用于移动终端等电子设备的变焦成像镜头与摄像装置。
背景技术
相关技术中，小型化变焦成像镜头主要采用多个透镜组移动变焦的方式，需要为各个透镜组预留移动空间，存在成像镜头的总长比较长、体积大、组装公差大、制造困难的问题。
发明内容
本公开提供了一种变焦成像镜头、摄像装置及电子设备。
根据本公开实施例的第一方面，提供一种变焦成像镜头，包括：第一透镜组与第二透镜组；
所述第一透镜组可沿所述变焦成像镜头的光轴移动，所述第二透镜组包括液态透镜组件，所述液态透镜组件包括流体与薄膜，所述流体被所述薄膜包裹；所述薄膜可变形以及可透光，所述薄膜的形状可随着外力变化，所述薄膜的形状改变时所述液态透镜组件的焦距改变，以实现所述变焦成像镜头变焦或对焦。
在一个实施例中，所述的变焦成像镜头，还包括马达，所述马达包括第一动子，所述马达被配置为驱动所述第一动子沿光轴移动；
所述液态透镜组件还包括第二动子，所述第二动子与所述第一动子固定连接，并可随所述第一动子沿所述光轴移动，以改变所述薄膜的形状。
在一个实施例中，所述液态透镜组件还包括基板，所述基板包括平板 部与环形挡墙，所述平板部与所述环形挡墙形成容纳空间，所述薄膜位于所述容纳空间中。
在一个实施例中，所述液态透镜组件还包括基板，所述基板为所述薄膜提供承靠面，以使所述薄膜与所述承靠面的接触部不变形。
在一个实施例中，所述第一透镜组与所述第二透镜组沿所述光轴由物侧至像侧依次排列。
在一个实施例中，所述变焦成像镜头还包括第三透镜组，所述第三透镜组位于所述第一透镜组的物侧，所述第三透镜组的位置固定。
在一个实施例中，所述第一透镜组的横向放大率满足如下关系式：
-2<beta<-0.5，
其中，beta为横向放大率。
在一个实施例中，所述第三透镜组至少包括一个正屈光度透镜，所述正屈光度透镜为固体镜片，所述正屈光度透镜的阿贝数大于30。
在一个实施例中，所述第三透镜组还包括至少一个负屈光度透镜，所述负屈光度透镜为固体镜片，所述负屈光度透镜的阿贝数小于40。
在一个实施例中，所述第二透镜组还至少包括一个正屈光度透镜与一个负屈光度透镜，所述正屈光度透镜与所述负屈光度透镜都为固体镜片。
在一个实施例中，所述第三透镜组最靠近物侧的表面顶点与像面在光轴上的距离为TTL，有效像高为IH，所述TTL与所述IH满足如下关系式：
TTL/IH<30。
在一个实施例中，所述流体的阿贝数大于40。
在一个实施例中，所述的变焦成像镜头还包括光圈，所述光圈位于所述第一透镜组与所述第二透镜组之间，或位于所述第二透镜组中。
在一个实施例中，所述光圈的光圈F值为F1.5～F4.5。
在一个实施例中，所述变焦成像镜头，还包括转向棱镜，所述转向棱镜位于所述第三透镜组的物侧，所述转向棱镜被配置为将沿第一方向入射的光沿第二方向射出至所述第三透镜组，所述第一方向与所述第二方向不同，所述光轴沿所述第二方向延伸。
在一个实施例中，所述变焦成像镜头的变焦比小于5。
根据本公开实施例的第二方面，提供一种摄像装置，包括图像传感器以及上述的变焦成像镜头，所述图像传感器位于所述变焦成像镜头的成像面。
根据本公开实施例的第三方面，提供一种电子设备，包括设备本体以及上述的摄像装置，所述摄像装置装配于所述设备本体上。
在一个实施例中，所述电子设备还包括控制模块，所述控制模块被配置为根据控制信号与预设的第一对应关系控制所述第一透镜组的位置，以实现变焦或对焦，其中，所述第一对应关系包括所述第一透镜组的位置的控制信息与所述变焦成像镜头的焦距的对应关系，所述控制信号包括所述变焦成像镜头的焦距的信息。
在一个实施例中，所述控制模块还被配置为根据所述控制信号与预设的第二对应关系控制所述液态透镜组件的焦距，以实现变焦或对焦，其中，所述第二对应关系包括所述变焦成像镜头的焦距、成像距离和所述液态透镜组件的焦距的控制信息之间的对应关系。
在一个实施例中，所述电子设备还包括温度传感器，所述温度传感器被配置为获取所述液态透镜组件的温度信息，所述第二对应关系还包括液态透镜组件的温度信息与当前温度下最佳对焦时所述液态透镜组件的焦距的控制信息的对应关系。
在一个实施例中，当所述变焦成像镜头还包括转向棱镜时，第一方向与第二方向垂直，所述光轴沿所述第二方向延伸；
当所述电子设备的短边沿所述第二方向延伸时，所述电子设备的长边沿第一方向延伸，或所述电子设备的厚度方向为所述第一方向；
当所述电子设备的长边沿所述第二方向延伸时，所述电子设备的短边沿第一方向延伸，或所述电子设备的厚度方向为所述第一方向。
附图说明
图1是根据一示例性实施例示出的一种摄像装置的结构示意图。
图2是根据一示例性实施例示出的另一种摄像装置的结构示意图。
图3是根据一示例性实施例示出的另一种摄像装置的结构示意图。
图4是根据一示例性实施例示出的成像镜头的广角端的球差、像散场曲与畸变曲线图。
图5是根据一示例性实施例示出的成像镜头的长焦端的球差、像散场曲与畸变曲线图。
图6是根据一示例性实施例示出的一种电子设备的结构框图。
图7是根据一示例性实施例示出的一种电子设备的结构示意图。
图8是根据一示例性实施例示出的电子设备的截面示意图。
具体实施方式
为使本公开的上述目的、特征和优点能够更为明显易懂，下面结合附图对本公开的具体实施例做详细的说明。
图1是根据一示例性实施例示出的摄像装置的结构示意图。摄像装置包括变焦成像镜头100与图像传感器16。图像传感器16位于变焦成像镜头100的成像面161处。图像传感器16接收经变焦成像镜头100入射的光，采集图像信息。
如图1所示，该成像镜头100包括第一透镜组11、第二透镜组12、第三透镜组13、光圈14与滤光片15。
如图1所示，在本实施例中，第三透镜组13、第一透镜组11、第二透镜组12与滤光片15沿成像镜头100的光轴17由物侧至像侧依次排列。光圈14位于第二透镜组12中。在其他实施例中，光圈14也可位于第一透镜组11与第二透镜组12之间。
在本实施例中，第三透镜组13的位置固定，在变焦成像镜头100变焦或对焦的过程中，第三透镜组13的位置可保持不变。
如图1所示，在本实施例中，第三透镜组13可包括第一透镜131与第二透镜132。第一透镜131与第二透镜132由物侧至像侧依次排列。第一透镜131为双月形的镜片，具有负焦距，为负屈光度透镜。第一透镜131朝向物侧的第一表面1311为凸面，朝向像侧的第二表面1312为凹面。第二透镜132具有正焦距，为正屈光度透镜。第二透镜132朝向物侧的第三表面1321为凸面，朝向像侧的第四表面1322为凹面。
在本实施例中，第二透镜132的阿贝数大于30。较好地，第二透镜132的阿贝数大于35。优选地，第二透镜132的阿贝数大于40。第二透镜132的折射率较高，可增加曲面的曲率半径，有利于减小球差。
在本实施例中，第一透镜131的阿贝数小于40。较好地，第一透镜131的阿贝数小于35。优选地，第一透镜131的阿贝数小于30。
在本实施例中，第一透镜131与第二透镜132相配合，有利于减小色相差。
在本实施例中，第一透镜131与第二透镜132为固体镜片，且为球面镜片。第一透镜131的材料为玻璃，第二透镜132的材料为玻璃。当然，在其他实施例中，第一透镜131的材料与第二透镜132的材料还可为塑料、结晶体或半导体材料结构组件。
在本实施例中，第一透镜组11可沿光轴17移动。在变焦成像镜头100变焦或对焦的过程中，第一透镜组11的位置可改变，以改变变焦成像镜头100的焦距。
如图1所示，在本实施例中，第一透镜组11包括第三透镜111与第四透镜112。第三透镜111与第四透镜112由物侧至像侧依次排列。第三透镜111具有正焦距，为正屈光度透镜。第三透镜111朝向物侧的第五表面1111为凹面，朝向像侧的第六表面1112为凸面。第四透镜112具有负焦距，为负屈光度透镜。第四透镜112朝向物侧的第七表面1121为凹面，朝向像侧的第八表面1122为凸面。
在本实施例中，第三透镜111与第四透镜112为固体镜片。第三透镜111的材料为塑料，第四透镜112的材料为塑料。当然，在其他实施例中，第三透镜111的材料与第四透镜112的材料还可为玻璃、结晶体或半导体材料结构组件。
在本实施例中，第三透镜111与第四透镜112为非球面透镜。第三透镜111与第四透镜112的非球面的曲线方程式如下：
Figure PCTCN2021110637-appb-000001
其中，X为平行于光轴17的曲面的凹陷度，c为曲面极点处的曲率，r为非球面上的点与光轴17的垂直距离，K为圆锥常数，A、B、C、D、E为非球面系数。
在本实施例中，第一透镜组11的横向放大率满足如下关系式：
-2<beta<-0.5        (2)
其中，beta为横向放大率。
在本实施例中，第一透镜组11的横向放大率满足上述的关系式(2)时，第一透镜组11的焦距和移动量可控制在合适的范围内，有利于减小变焦 成像镜头100的总长。
在本实施例中，变焦成像镜头100的最大焦距和最短焦距的比值为变焦比，变焦比小于5。这样，能将变焦成像镜头100的总长保持在合理范围内，可适用于小巧的可携带的电子设备，例如，数码相机与手机。
如图1所示，在本实施例中，在变焦成像镜头100变焦或对焦的过程中，第二透镜组12整体上可不沿光轴17移动。
如图1所示，在本实施例中，第二透镜组12可包括液态透镜组件121、第五透镜122、第六透镜123、第七透镜124与第八透镜125。液态透镜组件121、第五透镜122、第六透镜123、第七透镜124与第八透镜125由物侧至像侧依次排列。
在本实施例中，如图2与图3所示，液态透镜组件121可包括基板1213、流体1214、薄膜1215、第二动子1216、第一环形结构件1217与第二环形结构件1218。流体1214被薄膜1215包裹。在本实施例中，流体1214、薄膜1215、第二动子1216与第一环形结构件1217位于基板1213的物侧。在其他应用中，流体1214、薄膜1215、第二动子1216与第一环形结构件1217也可位于基板1213的像侧。基板1213的材料为透明固体材料，比如玻璃平板。第一环形结构件1217固定于基板1213的物侧，第一环形结构件1217的材料可为金属材料，但不限于此。薄膜1215可透光、可变形，材料为弹性透明材料。薄膜1215的形状可随受到的外力发生变化。其中，所述的外力可以为推力或拉力。薄膜1215固定在第一环形结构件1217中，且基板1213为薄膜1215提供承靠面。薄膜1215包括接触部，接触部位于薄膜1215面向基板1213的一侧，该接触部与基板1213的承靠面接触，基板1213的承靠面用于保证薄膜1215的接触部不发生形变。薄膜1215上与接触部相对的一侧与空气接触。第二动子1216固定于薄膜1215上与接触部相对的一侧。薄膜1215上与接触部相对的一侧在受到第二动子1216的外力的作用下发生曲率变化。薄膜1215还包括有效通光区域P1，在有效通光区域P1的曲率半径改变时，液态透镜组件121 的焦距改变。其中，第二动子1216的运动方向和薄膜1215中心的运动方向相反。第二环形结构件1218位于基板1213的像侧，第二环形结构件1218的内壁在基板1213上的投影与有效通光区域P1的边缘在基板1213上的投影重合。第二环形结构件1218不透光，材料可为金属。第二环形结构件1218用于限定薄膜1215的有效通光区域P1。
需要说明的是，液态透镜组件121的结构不限于上述方式。例如，在其他实施例中，基板可包括平板部与环形挡墙，平板部与环形挡墙可一体成型并形成容纳空间。薄膜位于容纳空间中，并与平板部、环形挡墙接触，另一部分与空气接触。平板部为薄膜提供承靠面，以保证薄膜与承靠面的接触部分不发生形变。在一种可能的实现中，在液态透镜组件121具有负焦距或正焦距时，薄膜的一部分位于容纳空间中，在液态透镜组件121为平面透镜时，薄膜的全部位于容纳空间中。再如，关于第二动子1216，也可以通过改变第二动子1216的位置，提供相反方向的力，从而使第二动子1216的运动方向和薄膜1215中心的运动方向相同。
在本实施例中，如图2与图3所示，变焦成像镜头100还包括马达21，马达21包括第一动子211与定子212，第一动子211与定子212活动连接，马达21被配置为驱动第一动子211沿光轴17移动。
在本实施例中，如图2与图3所示，液态透镜组件121的第二动子1216与马达21的第一动子211固定连接，例如，第二动子1216与第一动子211可胶合连接，但不限于此。第二动子1216可随第一动子211沿光轴17移动，以改变有效通光区域P1的形状。
在本实施例中，第一动子211可为圆环，圆环为中空结构，圆环的中空部分的截面可呈圆形。第二动子1216可为圆管。圆管为中空结构，圆管的中空部分的截面可呈圆形。圆管的侧壁的厚度大于圆环的侧壁的厚度。圆环的侧圆面可与圆管的一个端面胶合连接。第二动子1216与第一动子211的连接方式不限于本实施例中的连接方式。
如图3所示，当马达21的第一动子211沿光轴17向像侧移动时，可对薄膜1215进行挤压，流体1214向中心方向集中，使有效通光区域P1向物侧凸起，形成凸面，与空气接触的薄膜的表面中心向物侧变化。此种情况下，液态透镜组件121具有正焦距。
当马达21的第一动子211沿光轴17向物侧移动时，可对薄膜1215进行拉伸，流体1214向边缘方向集中，使有效通光区域P1向像侧凹陷，形成凹面，与空气接触的薄膜的表面中心向像侧变化。此种情况下，液态透镜组件121具有负焦距。
需要说明的是，在本实施例中，第一动子211与第二动子1216直接连接，在其他实施例中，第一动子211也可与第二动子1216间接连接，这取决于液态透镜组件的结构。
在本实施例中，流体1214的阿贝数大于40，流体1214的材料为低色散材料，可以减小液态透镜组件121的焦距变化时所带来的色差变化。
在本实施例中，如图1所示，液态透镜组件121朝向物侧的第九表面1211的形状可变，朝向像侧的第十表面1212为平面。第九表面1211的形状改变时，液态透镜组件121的焦距改变。在变焦成像镜头100变焦或对焦的过程中，液态透镜组件121的焦距改变，液态透镜组件121的位置可不变。这样，不需要沿光轴为液态透镜组件121预留移动空间，可以减小变焦成像镜头100的总长以及体积，简化变焦成像镜头100的结构。同时减少了可移动的透镜组的数量，进而可以减小组装公差，降低制造困难。
在本实施例中，流体1214受外力作用，改变有效通光区域P1的形状即可改变液态透镜组件121的焦距。在变焦成像镜头100在无穷远与近距离之间进行对焦时，第一透镜组11的位置可保持不变，通过改变液态透镜组件121的焦距，进而实现对焦。
在本实施例中，如图1所示，第五透镜122具有正焦距、正屈光度， 且为固体镜片。第五透镜122朝向物侧的第十一表面1221为凹面，朝向像侧的第十二表面1222为凸面。
在本实施例中，如图1所示，第六透镜123具有正焦距、正屈光度，且为固体镜片。第六透镜123朝向物侧的第十三表面1231为凸面，朝向像侧的第十四表面1232为凸面。
在本实施例中，如图1所示，第七透镜124具有负焦距、负屈光度，且为固体镜片。第七透镜124朝向物侧的第十五表面1241为凹面，朝向像侧的第十六表面1242为凹面。
在本实施例中，如图1所示，第八透镜125为具有负焦距、负屈光度且为固体镜片。第八透镜125朝向物侧的第十七表面1251为凸面，朝向像侧的第十八表面1252为凹面。
在本实施例中，固体镜片的材料都可为玻璃、塑料、结晶体或半导体材料结构组件。
在本实施例中，如图1所示，光圈14位于液态透镜组件121与第五透镜122之间，起到视场光阑作用。光圈14可以为可变光圈或固定光圈。
在本实施例中，光圈14的直径根据模组的尺寸要求和焦距等规格确定。所述变焦成像镜头的光圈F值推荐范围为F1.5～F4.5之间。其中光圈F值＝镜头焦距/镜头有效口径直径。
在本实施例中，滤光片15用于滤除红外光与紫外光，避免红外光与紫外光干扰图像传感器16成像。
在本实施例中，变焦成像镜头100还可包括转向棱镜。转向棱镜位于第三透镜组13的物侧，转向棱镜被配置为将沿第一方向入射的光沿第二方向射出至第三透镜组13，第一方向与第二方向不同，光轴17沿第二方向延伸。在本实施例中，第一方向与第二方向可相互垂直。
在本实施例中，如图1所示，第三透镜组13朝向物侧的表面顶点与像 面161在光轴17上的距离为TTL，有效像高为IH，TTL与IH可满足如下关系式：
TTL/IH<30         (3)
其中，有效像高为图像传感器16的有效成像区域对角线总长的一半。
优选地，TTL与IH可满足如下关系式：
TTL/IH<25          (4)
当TTL与IH满足关系式(3)与关系式(4)时，可将变焦成像镜头100的总长限定在合适的范围内，有利于将变焦成像镜头100用于可携带电子设备，满足小型化要求。
在本实施例中，摄像装置的光学结构数据如表1所示。非球面数据如表2所示，其中，K为非球面曲线方程式中的圆锥常数，A、B、C、D、E为各表面第4、6、8、10、12阶非球面系数。无穷远距离对焦(可简称“无穷远对焦”)时对应的位置信息可如表3所示，500mm距离对焦时对应的位置信息可如表4所示。
表1
TYPE surface R thi Nd Vd EFL
平面 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  
平面 10 inf 0.21 1.52 64.20  
平面 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      
平面 21 inf 0.21 1.52 64.20  
平面 22 inf 0.50      
平面 23 image -      
表1中，surface是由物侧向像侧依次排列的表面的序数，例如，surface为1的表面为第一表面1311，surface为2的表面为第二表面1312，surface为3的表面为第三表面1321，surface为4的表面为第四表面1322，surface为5的表面为第五表面1111，surface为6的表面为第六表面1112，surface为7的表面为第七表面1121，surface为8的表面为第八表面1122，surface为9的表面为第九表面1211，surface为10的表面为基板1213面向物侧的表面，为平面，surface为11的表面为第十表面1212，STO为光圈14，surface为13的表面为第十一表面1221，surface为14的表面为第十二表面1222，surface为15的表面为第十三表面1231，surface为16的表面为第十四表面1232，surface为17的表面为第十五表面1241，surface为18的表面为第十六表面1242，surface为19的表面为第十七表面1251，surface为20的表面为第十八表面1252，surface为21的表面为滤光片15面向物侧的第十九表面151，surface为22的表面为滤光片15面向像侧的第二十表面152，surface为23的表面为成像面(image)。OBJ为对焦物体面。
表1中，TYPE为镜片的表面面型，ASP代表非球面，SPH代表球面。R为曲率半径，inf为无限大。r1为第九表面1211的曲率。thi代表相邻两个表面之间的间隔。当相邻两个表面属于同一透镜时，thi为透镜的厚度，当相邻两个表面不属于同一透镜时，thi为空气间隔。D0为对焦物体面到第一透镜131面向物侧的顶点的距离。d1为第二透镜132与第三透镜111之间的空气间隔，d2为第四透镜112与液态透镜组件121之间的空气间隔。
表1中，Nd为对d线的折射率，d线为波长为587.6nm的光。Vd是阿贝数，EFL是焦距，单位为毫米。
表3中，Z1、Z2、Z3分别为无穷远距离对焦时成像镜头100的焦距为最小值、中间值、最大值的对焦状态，即分别为广角、中间和长焦状态。其中，中间值为介于最小值与最大值之间的一个值，不必是中值。f为成像镜头100的焦距，Fno为光圈F值，f_LL为液态透镜组件121的焦距。
表4为上述Z1、Z2、Z3三个焦距状态在500mm距离对焦时对应的成像镜头100的焦距，第一透镜群和第二透镜群位置状态信息。
表2
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
表3
Figure PCTCN2021110637-appb-000002
表4
Figure PCTCN2021110637-appb-000003
在本实施例中，成像镜头100的广角端的球差、像散和场曲(ASTIGMATIC FIELD CURVES)以及畸变(DISTORTION)曲线图如图4所示。图4的球差曲线中，横轴为焦点(FOCUS)偏移量，单位是毫米 (MILLIMETERS)，纵轴为纵向球面像差(LONGITUDINAL SPHERICAL ABER.)，单位是毫米。图4的像素和场曲曲线中横轴为焦点偏移量，单位是毫米，纵轴为像高(IMG HT)，单位是毫米。S和T分别代表弧矢和子午方向。两者都包含470nm、587.6nm和656nm的分布曲线，以587.6nm为中心。图4的畸变分布曲线中，横轴为畸变率，纵轴为像高，单位是毫米。
在本实施例中，成像镜头100的长焦端的球差、像散和场曲(ASTIGMATIC FIELD CURVES)和畸变(DISTORTION)曲线图如图5所示。
本公开实施例还提供一种摄像装置，该摄像装置包含上述任一实施例所述的变焦成像镜头100。
本公开一示例性实施例还提供一种电子设备。该电子设备包括设备本体以及上述任一实施例的摄像装置，摄像装置装配于设备本体上。
在本实施例中，电子设备可以是数码相机、手机、无人机、监视器等小型化电子设备。
在本实施例中，如图6所示，电子设备1000除了包括摄像装置1002，还可包括控制模块1004、存储模块1006以及传输模块1008。
在本实施例中，控制模块1004被配置为控制变焦成像镜头100的变焦和对焦运动，例如，可通过控制第一透镜组11的位置与液态透镜组件121的焦距来控制变焦成像镜头100的焦距。
具体实现方式上，在本实施例中，控制模块1004被配置为根据控制信号与第一对应关系来控制第一透镜组11的位置，以实现变焦或对焦。其中，第一对应关系为第一透镜组11的位置的控制信息与变焦摄像镜头成像镜头100的焦距的对应关系。上述的控制信号可根据用户输入的控制指令生成，包括变焦成像镜头的焦距的信息。
在本实施例中，控制模块1004中还包含温度传感器与距离传感器。温 度传感器被配置为获取液态透镜组件121的温度信息，距离传感器被配置为检测成像距离，成像距离为图像传感器16与被摄物体之间的距离。距离传感器可以为TOF(Time of flight，飞行时间)传感器或红外距离传感器，但不限于此。控制模块1004还被配置为根据控制信号、获取的液态透镜组件121的温度信息与检测到的成像距离以及第二对应关系来控制液态透镜组件121的焦距，以实现辅助变焦和对焦。其中，第二对应关系包括变焦成像镜头100的焦距、成像距离、液态透镜组件121的温度信息和当前温度下最佳对焦时液态透镜组件的焦距的控制信息之间的对应关系。在本实施例中，可以补偿温度变化引起的后焦变化和对焦点漂移，从而扩大电子设备可使用温度范围。
需要说明的是，温度传感器与距离传感器可以是控制模块1004的组成部分，也可以是独立于控制模块1004的器件。
在本实施例中，存储模块1006被配置为存储摄像装置1002采集的图像信息。存储模块1006可以是板载存储器，例如闪存，但不限于此。
在本实施例中，传输模块1008被配置为将摄像装置1002采集的图像信息传输出去。传输模块1008可以使用一种或多种连接，例如，USB接口、以太接口或蓝牙无线连接，但不限于此。
在本实施例中，如图7所示，电子设备1000的厚度方向沿第一方向H延伸，电子设备1000的短边沿第二方向W延伸，电子设备1000的长边沿第三方向L延伸。第一方向H、第二方向W与第三方向L相垂直。如图7～图8所示，变焦成像镜头100的光轴17沿第二方向W延伸。这样，电子设备可提供相对充足的空间给变焦成像镜头100，使变焦成像镜头100在对焦或变焦时不再受限于电子设备的尺寸。
如图8所示，光线沿第一方向H入射至玻璃盖板1010，透过玻璃盖板1010的光沿第一方向H入射至摄像装置1002，具体是，透过玻璃盖板1010的光沿第一方向H入射至转向棱镜，转向棱镜将入射的光沿第二方向W射出 至第三透镜组13，从第三透镜组13出射的光依次透过第一透镜组11、第二透镜组12以及滤光片15，最终入射至图像传感器16。
在另一个实施例中，当电子设备1000的短边沿第二方向延伸时，电子设备1000的长边可沿第一方向延伸。在又一个实施例中，当电子设备1000的长边沿第二方向延伸时，电子设备1000的短边可沿第一方向延伸，或电子设备1000的厚度方向为第一方向。
虽然本公开披露如上，但本公开并非限定于此。任何本领域技术人员，在不脱离本公开的精神和范围内，均可作各种更动与修改，因此本公开的保护范围应当以权利要求所限定的范围为准。

Claims (22)

  1. 一种变焦成像镜头，其特征在于，包括：第一透镜组与第二透镜组；
    所述第一透镜组可沿所述变焦成像镜头的光轴移动，所述第二透镜组包括液态透镜组件，所述液态透镜组件包括流体与薄膜，所述流体被所述薄膜包裹；所述薄膜可变形以及可透光，所述薄膜的形状可随着外力变化，所述薄膜的形状改变时所述液态透镜组件的焦距改变，以实现所述变焦成像镜头变焦或对焦。
  2. 根据权利要求1所述的变焦成像镜头，其特征在于，还包括马达，所述马达包括第一动子，所述马达被配置为驱动所述第一动子沿光轴移动；
    所述液态透镜组件还包括第二动子，所述第二动子与所述第一动子固定连接，并可随所述第一动子沿所述光轴移动，以改变所述薄膜的形状。
  3. 根据权利要求1所述的变焦成像镜头，其特征在于，所述液态透镜组件还包括基板，所述基板包括平板部与环形挡墙，所述平板部与所述环形挡墙形成容纳空间，所述薄膜位于所述容纳空间中。
  4. 根据权利要求1所述的变焦成像镜头，其特征在于，所述液态透镜组件还包括基板，所述基板为所述薄膜提供承靠面，以使所述薄膜与所述承靠面的接触部不变形。
  5. 根据权利要求1所述的变焦成像镜头，其特征在于，所述第一透镜组与所述第二透镜组由物侧至像侧依次排列。
  6. 根据权利要求5所述的变焦成像镜头，其特征在于，还包括第三透镜组，所述第三透镜组位于所述第一透镜组的物侧，所述第三透镜组的位置固定。
  7. 根据权利要求6所述的变焦成像镜头，其特征在于，所述第一透镜组的横向放大率满足如下关系式：
    -2<beta<-0.5，
    其中，beta为横向放大率。
  8. 根据权利要求7所述的变焦成像镜头，其特征在于，所述第三透镜组至少包括一个正屈光度透镜，所述正屈光度透镜为固体镜片，所述正屈光度透镜的阿贝数大于30。
  9. 根据权利要求8所述的变焦成像镜头，其特征在于，所述第三透镜组还包括至少一个负屈光度透镜，所述负屈光度透镜为固体镜片，所述负屈光度透镜的阿贝数小于40。
  10. 根据权利要求1所述的变焦成像镜头，其特征在于，所述第二透镜组还至少包括一个正屈光度透镜与一个负屈光度透镜，所述正屈光度透镜与所述负屈光度透镜都为固体镜片。
  11. 根据权利要求6所述的变焦成像镜头，其特征在于，所述第三透镜组物侧的表面顶点与像面在光轴上的距离为TTL，有效像高为IH，所述TTL与所述IH满足如下关系式：
    TTL/IH<30。
  12. 根据权利要求1所述的变焦成像镜头，其特征在于，所述流体的阿贝数大于40。
  13. 根据权利要求1所述的变焦成像镜头，其特征在于，还包括光圈，所述光圈位于所述第一透镜组与所述第二透镜组之间，或位于所述第二透镜组中。
  14. 根据权利要求13所述的变焦成像镜头，其特征在于，所述光圈的光圈值为F1.5～F4.5。
  15. 根据权利要求6所述的变焦成像镜头，其特征在于，还包括转向棱镜，所述转向棱镜位于所述第三透镜组的物侧，所述转向棱镜被配置为将沿第一方向入射的光沿第二方向射出至所述第三透镜组，所述第一方向与所述第二方向不同，所述光轴沿所述第二方向延伸。
  16. 根据权利要求6所述的变焦成像镜头，其特征在于，所述变焦成 像镜头的变焦比小于5。
  17. 一种摄像装置，其特征在于，包括图像传感器以及权利要求1至16任一项所述的变焦成像镜头，所述图像传感器位于所述变焦成像镜头的成像面。
  18. 一种电子设备，其特征在于，包括设备本体以及权利要求17所述的摄像装置，所述摄像装置装配于所述设备本体上。
  19. 根据权利要求18所述的电子设备，其特征在于，还包括控制模块，所述控制模块被配置为根据控制信号与预设的第一对应关系控制所述第一透镜组的位置，以实现变焦或对焦，其中，所述第一对应关系包括所述第一透镜组的位置的控制信息与所述变焦成像镜头的焦距的对应关系，所述控制信号包括所述变焦成像镜头的焦距的信息。
  20. 根据权利要求19所述的电子设备，其特征在于，所述控制模块还被配置为根据所述控制信号与预设的第二对应关系控制所述液态透镜组件的焦距，以实现变焦或对焦，其中，所述第二对应关系包括所述变焦成像镜头的焦距、成像距离和所述液态透镜组件的焦距的控制信息之间的对应关系。
  21. 根据权利要求20所述的电子设备，其特征在于，还包括温度传感器，所述温度传感器被配置为获取所述液态透镜组件的温度信息，所述第二对应关系还包括液态透镜组件的温度信息与当前温度下最佳对焦时所述液态透镜组件的焦距的控制信息的对应关系。
  22. 根据权利要求18所述的电子设备，其特征在于，当所述变焦成像镜头还包括转向棱镜时，第一方向与第二方向垂直，所述光轴沿所述第二方向延伸；
    当所述电子设备的短边沿所述第二方向延伸时，所述电子设备的长边沿第一方向延伸，或所述电子设备的厚度方向为所述第一方向；
    当所述电子设备的长边沿所述第二方向延伸时，所述电子设备的短边沿第一方向延伸，或所述电子设备的厚度方向为所述第一方向。
PCT/CN2021/110637 2021-08-04 2021-08-04 变焦成像镜头、摄像装置及电子设备 WO2023010350A1 (zh)

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