WO2024011358A1 - 变焦镜头、摄像头模组及电子设备 - Google Patents

变焦镜头、摄像头模组及电子设备 Download PDF

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Publication number
WO2024011358A1
WO2024011358A1 PCT/CN2022/104938 CN2022104938W WO2024011358A1 WO 2024011358 A1 WO2024011358 A1 WO 2024011358A1 CN 2022104938 W CN2022104938 W CN 2022104938W WO 2024011358 A1 WO2024011358 A1 WO 2024011358A1
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Prior art keywords
zoom lens
lens
lens group
wide
zoom
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PCT/CN2022/104938
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English (en)
French (fr)
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未来
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/104938 priority Critical patent/WO2024011358A1/zh
Publication of WO2024011358A1 publication Critical patent/WO2024011358A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group

Definitions

  • This application relates to the field of optical imaging technology, specifically to a zoom lens, camera module and electronic equipment.
  • This application provides a zoom lens, a camera module and an electronic device. Compared with hybrid optical zoom, the zoom lens can obtain higher imaging quality when applied to electronic devices.
  • the present application provides a zoom lens.
  • the zoom lens includes: a first lens group and a second lens group arranged from the object side to the image side; the first lens group has positive optical power, and the third lens group has positive optical power.
  • the two lens groups have negative refractive power; the zoom lens has a telephoto end and a wide-angle end, and both the first lens group and the second lens group can move along the optical axis direction to adjust the distance between the telephoto end and the wide-angle end.
  • this application also provides a camera module, which includes a photosensitive element and a zoom lens.
  • the zoom lens can move relative to the photosensitive element along the optical axis direction.
  • the application further provides an electronic device.
  • the electronic device includes a device body and a camera module.
  • the device body has an opening.
  • the camera module is disposed in the device body corresponding to the opening.
  • the zoom lens of the camera module can at least partially extend or retract the device body through the opening.
  • the zoom lens since the first lens group and the second lens group can move along the optical axis direction, the zoom lens can be adjusted at the telephoto end and wide angle by moving the first lens group and the second lens group. Zoom switch between terminals.
  • the zoom lens provided by this application switches between the telephoto end and the wide-angle end through continuous optical zoom. Therefore, higher imaging quality can be obtained.
  • the zoom lens provided by this application is equivalent to integrating lenses with multiple focal lengths, thereby reducing the number of lenses and reducing space occupation. Therefore, the zoom lens can be equipped with a larger-sized photosensitive element, thereby improving imaging quality.
  • the zoom lens satisfies the relationship 3 ⁇ TTLt/ImgH ⁇ 5
  • the zoom lens will not be too long and can be miniaturized.
  • the wide-angle end of the zoom lens satisfies the relationship 0.25 ⁇ ImgH/fw ⁇ 0.47
  • the field of view at the wide-angle end is in the range of 28° to 50°, thus ensuring that the focal length at the wide-angle end is within the commonly used range from medium telephoto to telephoto. within the focal length range.
  • the shape change of the lens in the radial direction will be relatively gentle, which can avoid excessive thickness of the lens and thus reduce the distortion of the lens in the direction from the object side to the image side. It takes up space to miniaturize the zoom lens, which is more conducive to application in electronic devices with thin and light requirements.
  • Figure 1 is a schematic diagram of an electronic device in a state according to an embodiment of the present application
  • Figure 2 is a schematic diagram of the electronic device shown in Figure 1 in another state
  • Figure 3 is a schematic diagram of the electronic device shown in Figure 2 from another perspective
  • Figure 4 is a schematic diagram of a zoom lens including a first bearing member and a second bearing member provided by an embodiment of the present application;
  • Figure 5 is a schematic diagram of a zoom lens in a retracted state according to an embodiment of the present application.
  • Figure 6 is a schematic diagram of the zoom lens shown in Figure 5 at the wide-angle end and telephoto end;
  • Figure 7 is a schematic diagram of a lens with a critical point provided by an embodiment of the present application.
  • Figure 8 is a schematic diagram of the zoom lens provided in Embodiment 1 of the present application in a retracted state
  • Figure 9 is a schematic diagram of the zoom lens shown in Figure 8 at the wide-angle end and the telephoto end;
  • Figure 10 is an astigmatism curve when the zoom lens shown in Embodiment 1 is at the wide-angle end;
  • Figure 11 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 1 is at the wide-angle end;
  • Figure 12 is a distortion curve of the zoom lens shown in Embodiment 1 when it is at the wide-angle end;
  • Figure 13 is an astigmatism curve when the zoom lens shown in Embodiment 1 is at the telephoto end;
  • Figure 14 is an on-axis chromatic aberration curve of the zoom lens shown in Embodiment 1 when it is at the telephoto end;
  • Figure 15 is a distortion curve of the zoom lens shown in Embodiment 1 when it is at the telephoto end;
  • Figure 16 is a schematic diagram of the zoom lens provided in Embodiment 2 of the present application in a retracted state
  • Figure 17 is a schematic diagram of the zoom lens shown in Figure 16 at the wide-angle end and telephoto end;
  • Figure 18 is an astigmatism curve when the zoom lens shown in Embodiment 2 is at the wide-angle end;
  • Figure 19 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 2 is at the wide-angle end;
  • Figure 20 is a distortion curve of the zoom lens shown in Embodiment 2 when it is at the wide-angle end;
  • Figure 21 is an astigmatism curve when the zoom lens shown in Embodiment 2 is at the telephoto end;
  • Figure 22 is an on-axis chromatic aberration curve of the zoom lens shown in Embodiment 2 when it is at the telephoto end;
  • Figure 23 is a distortion curve of the zoom lens shown in Embodiment 2 when it is at the telephoto end;
  • Figure 24 is a schematic diagram of the zoom lens provided in Embodiment 3 of the present application in a retracted state
  • Figure 25 is a schematic diagram of the zoom lens shown in Figure 24 at the wide-angle end and the telephoto end;
  • Figure 26 is an astigmatism curve when the zoom lens shown in Embodiment 3 is at the wide-angle end;
  • Figure 27 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 3 is at the wide-angle end;
  • Figure 28 is a distortion curve of the zoom lens shown in Embodiment 3 when it is at the wide-angle end;
  • Figure 29 is an astigmatism curve when the zoom lens shown in Embodiment 3 is at the telephoto end;
  • Figure 30 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 3 is at the telephoto end;
  • Figure 31 is a distortion curve of the zoom lens shown in Embodiment 3 when it is at the telephoto end;
  • Figure 32 is a schematic diagram of the zoom lens provided in Embodiment 4 of the present application in a retracted state
  • Figure 33 is a schematic diagram of the zoom lens shown in Figure 32 at the wide-angle end and telephoto end;
  • Figure 34 is an astigmatism curve when the zoom lens shown in Embodiment 4 is at the wide-angle end;
  • Figure 35 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 4 is at the wide-angle end;
  • Figure 36 is a distortion curve when the zoom lens shown in Embodiment 4 is at the wide-angle end;
  • Figure 37 is an astigmatism curve when the zoom lens shown in Embodiment 4 is at the telephoto end;
  • Figure 38 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 4 is at the telephoto end;
  • Figure 39 is a distortion curve when the zoom lens shown in Embodiment 4 is at the telephoto end;
  • Figure 40 is a schematic diagram of the zoom lens provided in Embodiment 5 of the present application in a retracted state
  • Figure 41 is a schematic diagram of the zoom lens shown in Figure 40 at the wide-angle end and telephoto end;
  • Figure 42 is an astigmatism curve when the zoom lens shown in Embodiment 5 is at the wide-angle end;
  • Figure 43 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 5 is at the wide-angle end;
  • Figure 44 is a distortion curve when the zoom lens shown in Embodiment 5 is at the wide-angle end;
  • Figure 45 is an astigmatism curve when the zoom lens shown in Embodiment 5 is at the telephoto end;
  • Figure 46 is an on-axis chromatic aberration curve when the zoom lens shown in Embodiment 5 is at the telephoto end;
  • Figure 47 is a distortion curve of the zoom lens shown in Example 5 when it is at the telephoto end.
  • the electronic device 100 includes a device body 1 and a camera module 2 .
  • the device body 1 has an opening K14, and the camera module 2 is arranged in the device body 1 corresponding to the opening K14.
  • the zoom lens 21 of the camera module 2 can at least partially extend or retract the device body 1 through the opening K14.
  • the zoom lens 21 can be controlled to extend from the device body 1 through the opening K14 (as shown in FIG. 2 ).
  • the zoom lens 21 can be controlled to retract into the device body 1 through the opening K14 (as shown in FIG. 1 ).
  • the electronic device 100 may be a mobile phone, a tablet computer, a notebook computer, a wearable device (such as a smart watch, a bracelet, a VR device, etc.), a television, an e-reader and other devices.
  • a wearable device such as a smart watch, a bracelet, a VR device, etc.
  • a television an e-reader and other devices.
  • the device body 1 refers to the main part of the electronic device 100.
  • the main part includes electronic components that realize the main functions of the electronic device 100 and a housing that protects and carries these electronic components.
  • the device body 1 may include a display screen 11, a middle frame 12, and a back cover 13 (as shown in Figure 3).
  • the display screen 11 and the back cover 13 are both connected to the middle frame 12, and are arranged on opposite sides of the middle frame 12. And the sides of the middle frame 12 are exposed outside the back cover 13 and the display screen 11 .
  • the camera module 2 can be disposed on any side of the electronic device 100, which is not limited in this application.
  • the camera module 2 can be installed on the front, back, or side of the mobile phone.
  • the so-called front refers to the side of the mobile phone with the display screen 11;
  • the so-called back refers to the side of the mobile phone with the back cover 13 (as shown in FIG. 3);
  • the so-called side refers to the circumferential side of the middle frame 12 of the mobile phone.
  • the definitions of the front, back, side, etc. may be different, and other types of electronic devices 100 will not be described in detail here.
  • the opening K14 may be opened on the back cover 13 (as shown in FIG. 3 ). In other embodiments, the opening K14 may also be provided on the display screen 11 ; or, the opening K14 may be provided on the middle frame 12 .
  • the camera module 2 is a rear camera.
  • the camera module is a front camera.
  • the length of the camera module will also be limited due to the thickness limitation of the electronic device.
  • the thickness of the camera module is limited, since the distance between the photosensitive element and the lens is not adjustable, the distance between the lens and the photosensitive element in the camera module will be limited. If the camera module is designed to be thicker and the electronic device is thinner, it may cause the camera module to form a thicker bulge on the back cover of the electronic device. Therefore, when the camera module in the related art is applied to an electronic device, it is impossible to achieve the compatibility of thinning and lightness of the electronic device and high imaging quality of the camera module.
  • the zoom lens 21 can extend or retract the device body 1 through the opening K14, the camera module 2 can have a larger focal length without affecting the electronic device.
  • the thickness of the electronic device 100 is 100, thereby solving the problem of incompatibility between the thinness and lightness of the electronic device 100 and the high imaging quality of the camera module 2 .
  • the camera module 2 includes a photosensitive element 23 and a zoom lens 21 described in any of the following embodiments.
  • the zoom lens 21 can move along the optical axis direction relative to the photosensitive element 23 .
  • the camera module 2 also includes a filter 22 .
  • the zoom lens 21, the filter 22, and the photosensitive element 23 are arranged in sequence along the optical axis X direction.
  • the external light passes through the zoom lens 21 and the filter 22 in sequence, and finally reaches the photosensitive element 23 .
  • the first lens group G1 and the second lens group G2 of the zoom lens 21 can move relative to the photosensitive element 23 along the optical axis X direction.
  • the zoom lens 21 is used to collect light from the photographed scene and focus the light on the photosensitive element 23 .
  • the filter 22 is used to eliminate unnecessary light to improve effective resolution and color reproduction.
  • the filter 22 may be, but is not limited to, an infrared filter 22 .
  • the photosensitive element 23 (Sensor) is also called a photosensitive chip or an image sensor, and is used to receive light passing through the filter 22 and convert the optical signal into an electrical signal.
  • the photosensitive element 23 may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS).
  • the photosensitive element 23 has an imaging surface S231, and the imaging surface S231 is a target surface on the photosensitive element 23 that receives light.
  • the zoom lens 21 includes a photosensitive element 23 having an imaging surface S231 and a filter 22 .
  • the zoom lens 21 in the above-mentioned camera module 2 will be introduced in detail below with reference to the accompanying drawings.
  • the zoom lens 21 includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side.
  • the object side and the image side respectively refer to: taking the zoom lens 21 as a boundary, the side where the subject is located is the object side, and the side where the image formed by the subject is located is the image side. Therefore, when shooting, light first passes through the first lens group G1 closer to the object side, and then passes through the second lens group G2 closer to the image side.
  • the first lens group G1 has positive optical power.
  • the second lens group G2 has negative refractive power.
  • the optical power represents the ability of the optical system (lens or lens group) to deflect light.
  • optical power is also the reciprocal of the image-side focal length.
  • the optical power of an optical system is positive, which means it has a converging effect on light.
  • the power of an optical system is negative, which means it diffuses light.
  • the first lens group G1 and the second lens group G2 are both used to achieve zooming through movement, so they can both be called zoom lens groups.
  • Either one of the first lens group G1 and the second lens group G2 is a compensation lens group. That is to say, the first lens group G1 is a compensation lens group, or the second lens group G2 is a compensation lens group.
  • the so-called compensation lens group refers to a lens group used to compensate the position of the image plane so that the focus of objects photographed at different distances falls on the imaging plane S231.
  • the lens on the most image side of the first lens group G1 has positive refractive power.
  • the so-called lens on the most image side refers to the lens closest to the image side in the first lens group G1.
  • FIG. 6(a) is a schematic diagram of the zoom lens shown in FIG. 5 at the wide-angle end.
  • Figure 6(b) is a schematic diagram of the zoom lens shown in Figure 5 at the telephoto end.
  • the zoom lens 21 has a telephoto end and a wide-angle end. Both the first lens group G1 and the second lens group G2 can move along the optical axis X direction to zoom switch between the telephoto end and the wide-angle end.
  • the telephoto end refers to the state when the focal length of the zoom lens 21 is maximum, and the telephoto end can also be called the telephoto state.
  • the wide-angle end refers to the state when the focal length of the zoom lens 21 is the smallest, and the wide-angle end can also be called the wide-angle state.
  • the positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the telephoto end are different from the positions of the first lens group G1 and the second lens group G2 when the zoom lens 21 is at the wide-angle end. Therefore, the telephoto end and the wide-angle end are two different shooting states of the zoom lens 21 .
  • the wide-angle end of the zoom lens 21 satisfies the relationship: 0.25 ⁇ ImgH/fw ⁇ 0.47.
  • fw is the focal length of the wide-angle end.
  • the TTLt/ImgH may be, but is not limited to, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.35, 0.37, 0.38, 0.386, 0.41, 0.43, 0.46, etc.
  • ImgH is 5.330mm and fw is 17.15mm; or ImgH is 5.330mm and fw is 14.5mm; or ImgH is 5.330mm and fw is 17.1mm.
  • the focal length of the wide-angle end is within the commonly used focal length range from medium telephoto to telephoto, that is, the wide-angle end can be used as a telephoto lens, and the telephoto end can be used as a super-telephoto lens.
  • a few high-end mobile phones are equipped with at least two lenses, including a telephoto lens and a super-telephoto lens.
  • the telephoto lens and the ultra-telephoto lens are set up separately. This design will first make the entire camera module larger and increase the product cost. In addition, it will also cause each lens to only be equipped with a small-base photosensitive element, which will Affecting the imaging quality will also limit the improvement of imaging quality.
  • the zoom lens 21 since both the first lens group G1 and the second lens group G2 can move along the optical axis X direction, this can be achieved by moving the first lens group G1 and the second lens group G2
  • the zoom lens 21 zooms and switches between a telephoto end and a wide-angle end.
  • the zoom lens 21 provided in this embodiment is equivalent to integrating a telephoto lens and a super-telephoto lens, thereby reducing the number of lenses and reducing space occupation. Therefore, the zoom lens 21 can be equipped with a large lens.
  • the bottom photosensitive element 23 (for example, using a 1/1.56-inch photosensitive element 23) can achieve 50-megapixel imaging from the wide-angle end to the telephoto end, thereby improving imaging quality (for example, achieving high-pixel shooting and reducing the signal-to-noise ratio).
  • the zoom lens 21 provided by the present application can realize continuous optical zoom shooting from the wide-angle end to the telephoto end, compared with using lenses belonging to different focal lengths to achieve continuous zoom through digital zoom (hybrid optical zoom), In other words, higher imaging quality can be obtained.
  • the telephoto end of the zoom lens 21 satisfies the relationship: 3 ⁇ TTLt/ImgH ⁇ 5.
  • TTLt is the total optical length of the zoom lens 21 when it is at the telephoto end.
  • ImgH is the image height, which refers to half of the diagonal length of the effective pixel area of the imaging plane S231. It should be noted that the total optical length refers to the distance from the surface of the first lens group G1 closest to the object side to the imaging surface S231. Please refer to here for the following description of the total optical length.
  • the TTLt/ImgH may be, but is not limited to, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.62, 3.7, 3.8, 3.9, 4.0, 4.1, 4.13, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8 , 4.9, etc.
  • TTLt is 23.572mm and ImgH is 5.330mm; or TTLt is 23.791mm and ImgH is 5.330mm; or TTLt is 24.500mm and ImgH is 5.330mm.
  • Limiting the ratio of TTLt to ImgH to a range of greater than 3 and less than 5 can ensure that the zoom lens 21 is not too long, thereby miniaturizing it, and is more suitable for electronic devices 100 that require thinness and thinness, such as mobile phones.
  • zoomable camera modules have been applied to electronic devices such as mobile phones that have thinning and lightness requirements.
  • the zoom function requires the lens in the camera module to move relative to the photosensitive element, the total length of the camera module must be longer, which is generally greater than the thickness of the electronic device.
  • periscope cameras are usually used, and the length direction of the periscope camera is arranged in accordance with the width direction (or length direction) of the electronic device, that is, the length direction of the periscope camera is in line with the length direction of the electronic device.
  • the thickness direction is set vertically.
  • the periscope camera is provided with a prism, which is used to receive and reflect external light so that the reflected light propagates along the length of the periscope camera.
  • the aperture, peripheral brightness and other specifications of the periscope camera are also limited by the thickness of the prism.
  • the zoom lens 21 when the zoom lens 21 is applied to the electronic device 100, the zoom lens 21 can be extended or retracted through the opening K14 on the device body 1, so that the first lens group G1 and the second lens group G2 are opposite to the photosensitive element 23 movement to achieve zoom.
  • This structural form does not involve prisms, so it is not subject to restrictions brought by prisms and can achieve a large aperture. Therefore, the zoom lens 21 provided by this application can improve imaging quality.
  • the number of critical points Q of at least one lens in the zoom lens 21 is greater than or equal to 2.
  • the zoom lens 21 includes at least one lens with two critical points Q or above.
  • the critical point Q refers to the tangent point on the lens surface that is tangent to a tangent plane perpendicular to the optical axis X, in addition to the intersection point with the optical axis X.
  • the shape change of the lens in the radial direction will be relatively gentle, which can prevent the lens from being too thick and reduce the space occupied by the lens in the direction from the object side to the image side. space, so that the zoom lens 21 can be miniaturized, which is more conducive to application in electronic devices 100 that require thinness and lightness.
  • the zoom lens 21 also has a retracted state.
  • the relationship is satisfied: cTTL ⁇ TTLw and cTTL ⁇ TTLt.
  • cTTL is the total optical length when the zoom lens 21 is in the retracted state
  • TTLw is the total optical length when the zoom lens 21 is at the wide-angle end
  • TTLt is the total optical length of the zoom lens 21 when it is at the telephoto end.
  • the total optical length cTTL when the zoom lens 21 is in the retracted state is the shortest, which is smaller than the total optical length corresponding to the telephoto end and the wide-angle end, so cTTL is the minimum total length of the zoom lens 21. Therefore, when the user needs to take pictures, the user can control the zoom lens 21 to extend to switch to the wide-angle end or the telephoto end. When the user does not need to take pictures, the user can control the zoom lens 21 to shorten to switch to the contracted state.
  • the zoom lens 21 when the zoom lens 21 is extended to switch to the wide-angle end or the telephoto end, it extends out of the electronic device 100 through the opening K14; when the zoom lens 21 is shortened to switch to the wide-angle end or the telephoto end, In the retracted state, the zoom lens 21 is retracted into the electronic device 100 .
  • the zoom lens 21 satisfies: cTTL ⁇ TTLw ⁇ TTLt; that is to say, the total optical length TTLt when the zoom lens 21 is at the telephoto end is greater than the total optical length TTLw when the zoom lens 21 is at the wide-angle end, so TTLt is the zoom lens 21 the maximum total length. From a zoom perspective, when the zoom lens 21 switches from the retracted state to the wide-angle end, the first lens group G1 moves toward the object side along the optical axis X (please refer to Figures 5 and 6 ).
  • the first lens group G1 moves toward the object side along the optical axis X
  • the second lens group G2 moves toward the object side along the optical axis X. Move sideways (please refer to Figure 6). It should be noted that when the zoom lens 21 switches from the retracted state to the wide-angle end, the second lens group G2 may not move, or may move toward the object side along the optical axis X.
  • the contracted state of the zoom lens 21 satisfies the relationship: 1 ⁇ cTTL/ImgH ⁇ 2.
  • cTTL is the total optical length of the zoom lens 21 when it is in the contracted state
  • ImgH is the image height.
  • cTTL/ImgH can be, but is not limited to, 1.1, 1.2, 1.24, 1.3, 1.4, 1.5, 1.55, 1.6, 1.7, 1.8, 1.9, etc.
  • cTTL is 9.640mm and ImgH is 5.330mm; or cTTL is 9.910mm and ImgH is 5.330mm; or cTTL is 10.400mm and ImgH is 5.330mm.
  • the zoom lens 21 provided by the present application can be applied to electronic devices 100 with thinning and lightness requirements, such as cell phone. This allows the zoom lens 21 to not only be miniaturized, but also effectively maintain good optical performance.
  • both the first lens group G1 and the second lens group G2 are located in the device body 1 .
  • the first lens group G1 is at least partially located outside the device body 1 .
  • the second lens group G2 is at least partially located within the device body 1 .
  • the zoom lens 21 when the zoom lens 21 is at the telephoto end, the first lens group G1 is located outside the device body 1 , and the second lens group G2 is at least partially located outside the device body 1 .
  • the zoom lens 21 further includes an aperture 211 .
  • the diaphragm 211 is disposed on the object side of the first lens group G1 or inside the first lens group G1 or on the image side of the first lens group G1 .
  • the diaphragm 211 moves along with the first lens group G1.
  • the diaphragm 211 may be disposed on the object side or the image side of the first lens group G1 , or may be disposed between two adjacent lenses constituting the first lens group G1 .
  • the diaphragm 211 is relatively fixed to the first lens group G1. During the zooming process, the diaphragm 211 moves together with the first lens group G1.
  • the diaphragm 211 can be fixed to the first lens group G1 for reasonable use. space, and the radial size of each lens in the first lens group G1 is smaller, so the diaphragm 211 is easier to be fixed with the first lens group G1.
  • the zoom lens 21 further includes a third lens group G3 .
  • the third lens group G3 is fixedly disposed on the image side of the second lens group G2 .
  • the third lens group G3 is used to correct the chief ray incident angle (Chief Ray Angle, CRA) at the wide-angle end and telephoto end.
  • CRA is a parameter of the Sensor, and the light needs to be incident on the Sensor at the required angle.
  • the zoom lens 21 the CRA at the wide-angle end and the telephoto end needs to be consistent. Therefore, the third lens group G3 is used to ensure that the zoom lens 21 has better imaging quality.
  • the total number of lenses in the first lens group G1 is 3-5, that is, 3, 4, or 5 lenses.
  • the total number of lenses in the second lens group G2 is 2-4, that is, 2, 3, or 4.
  • the zoom lens 21 includes the third lens group G3, the total number of lenses in the third lens group G3 is 1-2, that is, 1 or 2.
  • each lens in the first lens group G1, the second lens group G2, and the third lens group G3 can be a glass lens or a plastic lens.
  • Each lens can have positive or negative power.
  • the surface of the lens close to the object side is called the object side
  • the surface of the lens close to the image side is called the image side.
  • the object side of each lens in the above three lens groups can be spherical, aspheric, etc., and similarly, the image side of each lens can be spherical, aspheric, etc.
  • the zoom lens 21 further includes a first bearing member 212 and a second bearing member 213 .
  • the first bearing member 212 can be sleeved on the outer periphery of the second bearing member 213 . Both the first bearing member 212 and the second bearing member 213 can move relatively along the optical axis X direction.
  • the first lens group G1 is fixed in the first carrier 212 .
  • the first carrying member 212 is used to drive the first lens group G1 to move along the optical axis X relative to the photosensitive element 23 .
  • the second lens group G2 is fixed in the second bearing member 213 .
  • the second bearing member 213 is used to drive the second lens group G2 to move along the optical axis X relative to the photosensitive element 23 .
  • the first bearing member 212 may be disposed in the opening K14 of the electronic device 100, and the first bearing member 212 and the second bearing member 213 may extend or retract the electronic device 100 through the opening K14.
  • the first lens group G1 and the second lens group G2 can be carried in other ways.
  • the structure shown in FIG. 4 is only an illustration and should not be regarded as a limitation of the present application.
  • the zoom lens 21 satisfies the relationship: -1 ⁇ f1/f2 ⁇ -0.5.
  • f1 is the focal length of the first lens group G1
  • f2 is the focal length of the second lens group G2.
  • f1/f2 can be, but is not limited to, -0.9, -0.8, -0.82, -0.7, -0.76, -0.6, -0.61, etc.
  • f1 is 15.491mm and f2 is -18.653mm; or f1 is 13.127mm and f2 is -13.865mm; or f1 is 12.372mm and f2 is -15.689mm.
  • the ratio of the focal length f1 of the first lens group G1 to the focal length f2 of the second lens group G2 is set to be greater than -1 and less than -0.5, so that the first lens group G1 and the second lens group G2 can be reasonably allocated
  • the optical power relationship enables better focusing and zooming.
  • the zoom lens 21 satisfies the relationship: 0.15 ⁇ d/TTLt ⁇ 0.5.
  • ⁇ d is the distance that the first lens group G1 moves during the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end
  • TTLt is the distance when the zoom lens 21 is at the telephoto end. total optical length.
  • ⁇ d/TTLt may be, but is not limited to, 0.16, 0.17, 0.19, 0.2, 0.21, 0.26, 0.3, 0.32, 0.4, 0.45, etc.
  • ⁇ d is 5.861mm and TTLt is 23.572mm; or ⁇ d is 7.600mm and TTLt is 23.791mm; or ⁇ d is 7.072mm and TTLt is 24.500mm.
  • the ratio of the moving distance of the first lens group G1 from the wide-angle end to the telephoto end and the maximum total optical length of the zoom lens 21 is reasonably set between 0.15 and 0.5, so that a smaller lens group can be used.
  • the interval variation achieves a larger zoom ratio, which is beneficial to compressing the total length of the zoom lens 21 .
  • the zoom lens 21 satisfies the relationship: 1.5 ⁇ tan(hFOVw)/tan(hFOVt).
  • hFOVw is the half field of view angle when the zoom lens 21 is at the wide-angle end
  • hFOVt is the half field of view angle when the zoom lens 21 is at the telephoto end.
  • the half field of view refers to half of the field of view (Field of Vision, FOV).
  • the field of view angle can also be called the picture angle.
  • the half field of view angle is the half picture angle.
  • tan(hFOVw)/tan(hFOVt) may be, but is not limited to, 1.6, 1.71, 1.8, 1.9, 2.0, 2.1, 2.2, 2.25, etc.
  • hFOVw is 16.973° and hFOVt is 10.949°; or hFOVw is 20.641° and hFOVt is 10.918°; or hFOVw is 16.930° and hFOVt is 10.848°.
  • the zoom magnification of the zoom lens 21 is greater than 1.5 times.
  • the zoom lens 21 satisfies the relationship: fw/ENPw ⁇ 3.
  • fw is the focal length of the wide-angle end
  • ENPw is the entrance pupil diameter when the zoom lens 21 is at the wide-angle end.
  • fw/ENPw can be, but is not limited to, 2.9, 2.86, 2.7, 2.6, 2.5, 2.4, 2.3, 2.26, 2.2, 2.18, 2.1, 2.0, 1.98, 1.9, 1.8, etc.
  • fw is 17.15mm
  • ENPw is 6.888mm
  • fw is 14.5mm
  • ENPw is 6.042mm
  • fw is 17.1mm
  • ENPw is 6.333mm.
  • the aperture of the wide-angle end is less than 3, thereby improving the brightness and blur effect of the lens.
  • the brightness of the lens increases, more light enters the lens, which means that clear images can be captured at night.
  • the total number of lenses N in the zoom lens 21 satisfies: 5 ⁇ N ⁇ 10.
  • the total number of lenses N may be 5, or 6, or 7, or 8, or 9, or 10.
  • the total number of lenses in the first lens group G1 is 4, the total number of lenses in the second lens L2 is 3, and the total number of lenses in the third lens group G3 is 0.
  • the total number of lenses in the first lens group G1 is four, the total number of lenses in the second lens L2 is three, and the total number of lenses in the third lens group G3 is one.
  • the total number of lenses N is selected between 5 and 10 by taking both imaging quality and total optical length into consideration, thereby ensuring that the zoom lens 21 has better imaging effects while achieving the beneficial effect of miniaturization of the zoom lens 21 .
  • the wide-angle end and telephoto end of the zoom lens 21 are only relative. It does not mean that the wide-angle end is equivalent to the wide-angle lens, but that the focal length of the wide-angle end is smaller than the focal length of the telephoto end, and the viewing angle of the wide-angle end is smaller than that of the telephoto end.
  • the field angle is larger than that of the telephoto end, thus distinguishing the wide-angle end and the telephoto end.
  • the wide-angle end is used for telephoto and can be equivalent to a telephoto lens, while the telephoto end is used for super-telephoto and can be equivalent to a super-telephoto lens.
  • the maximum total optical length TTLt of the zoom lens 21 can be controlled below 26.65 mm (for example, 20 mm).
  • the total optical length cTTL of the zoom lens 21 in the contracted state when not in use can be controlled to be less than 10.66 mm (for example, 10 mm).
  • the field of view at the wide-angle end can be achieved below 50 degrees.
  • the field of view angle at the telephoto end can be less than 26 degrees (for example, around 21 degrees). Therefore, the zoom lens 21 provided by the present application can not only be well adapted to the electronic device 100 that requires thinness and lightness, but also has good shooting performance.
  • x is the distance sagittal height from the aspherical surface vertex when the aspherical surface is at a height h along the optical axis
  • k is the cone coefficient (see table);
  • Ai is the i-th order aspheric coefficient.
  • FIG. 9(a) is a schematic diagram of the zoom lens shown in FIG. 8 at the wide-angle end.
  • FIG. 9(b) is a schematic diagram of the zoom lens shown in FIG. 8 at the telephoto end.
  • the zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side.
  • the first lens group G1 is a lens group with positive refractive power
  • the second lens group G2 is a lens group with negative refractive power.
  • the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side.
  • the second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side.
  • the zoom lens 21 further includes an aperture 211 disposed between the second lens L2 and the third lens L3.
  • Table 1 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 1, including the radius of curvature R, the distance d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm).
  • surface numbers 1-19 are along the direction from the object side to the image side, marking the surface of the photographed object, each lens, aperture, filter, and imaging surface in sequence. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.
  • interval d represents the distance d between the current surface and the subsequent surface along the optical axis.
  • the distance between surface 2 and surface 3 in Table 1 is 1.496
  • the distance between surface 3 and surface 4 is 0.367. Please refer to here for information about interval d later.
  • Table 2 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 1, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.
  • Table 3 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 1.
  • Table 3 includes Table 3a, Table 3b, Table 3c, and Table 3d.
  • Table 4 shows the overall parameter data of the zoom lens in Example 1.
  • Table 5 shows the conditional expressions and corresponding data of the zoom lens in Embodiment 1.
  • N in the table below is the number of lenses.
  • FIGS. 10 to 12 show relevant graphs at the wide-angle end of the zoom lens.
  • Figure 10 is an astigmatism curve of the zoom lens in Example 1 when it is at the wide-angle end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 11 is an axial chromatic aberration curve of the zoom lens in Example 1 when it is at the wide-angle end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 12 is a distortion curve of the zoom lens in Example 1 when it is at the wide-angle end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • FIGS. 13 to 15 show relevant graphs at the telephoto end of the zoom lens.
  • Figure 13 is an astigmatism curve when the zoom lens in Example 1 is at the telephoto end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 14 is an axial chromatic aberration curve of the zoom lens in Example 1 when it is at the telephoto end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 15 is a distortion curve of the zoom lens in Example 1 when it is at the telephoto end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • the zoom lens provided in Embodiment 1 has good imaging quality at both the wide-angle end and the telephoto end.
  • FIG. 17(a) is a schematic diagram of the zoom lens shown in FIG. 16 at the wide-angle end.
  • FIG. 17(b) is a schematic diagram of the zoom lens shown in FIG. 16 at the telephoto end.
  • the zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side.
  • the first lens group G1 is a lens group with positive refractive power
  • the second lens group G2 is a lens group with negative refractive power.
  • the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side.
  • the second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side.
  • the zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.
  • Table 6 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 2, including the radius of curvature R, the distance d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm).
  • surface numbers 1-19 are along the direction from the object side to the image side, marking the surface of the photographed object, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.
  • Table 7 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 2, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.
  • Table 8 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 2.
  • Table 8 includes Table 8a, Table 8b, Table 8c, and Table 8d.
  • Table 9 shows the overall parameter data of the zoom lens in Example 2.
  • Table 10 shows the conditional expressions and corresponding data of the zoom lens in Example 2.
  • N in the table below is the number of lenses.
  • FIGS. 18 to 20 illustrate relevant graphs at the wide-angle end of the zoom lens.
  • Figure 18 is an astigmatism curve of the zoom lens in Example 2 when it is at the wide-angle end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 19 is an on-axis chromatic aberration curve of the zoom lens in Example 2 when it is at the wide-angle end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 20 is a distortion curve of the zoom lens in Example 2 when it is at the wide-angle end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • FIGS. 21 to 23 show relevant curves at the telephoto end of the zoom lens.
  • Figure 21 is an astigmatism curve when the zoom lens in Example 2 is at the telephoto end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 22 is an axial chromatic aberration curve of the zoom lens in Example 2 when it is at the telephoto end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 23 is a distortion curve of the zoom lens in Example 2 when it is at the telephoto end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • the zoom lens provided in Embodiment 2 has good imaging quality at both the wide-angle end and the telephoto end.
  • FIG. 25(a) is a schematic diagram of the zoom lens shown in FIG. 24 at the wide-angle end.
  • FIG. 25(b) is a schematic diagram of the zoom lens shown in FIG. 24 at the telephoto end.
  • the zoom lens 21 provided in this embodiment includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged along the object side to the image side.
  • the first lens group G1 is a lens group with positive refractive power
  • the second lens group G2 is a lens group with negative refractive power.
  • the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side.
  • the second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side.
  • the third lens group G3 includes an eighth lens L8.
  • the zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.
  • Table 11 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 3, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm).
  • surface numbers 1-21 are along the direction from the object side to the image side, marking the surface of the subject, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.
  • Table 12 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 3, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.
  • Table 13 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 3.
  • Table 13 includes Table 13a, Table 13b, Table 13c, and Table 13d.
  • Table 14 shows the overall parameter data of the zoom lens in Example 3.
  • Table 15 shows the conditional expressions and corresponding data of the zoom lens in Example 3.
  • N in the table below is the number of lenses.
  • FIGS. 26 to 28 show relevant graphs at the wide-angle end of the zoom lens.
  • Figure 26 is an astigmatism curve when the zoom lens in Example 3 is at the wide-angle end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 27 is an on-axis chromatic aberration curve of the zoom lens in Example 3 when it is at the wide-angle end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 28 is a distortion curve of the zoom lens in Example 3 when it is at the wide-angle end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • FIGS. 29 to 31 show relevant graphs at the telephoto end of the zoom lens.
  • Figure 29 is an astigmatism curve when the zoom lens in Example 3 is at the telephoto end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 30 is an axial chromatic aberration curve of the zoom lens in Example 3 when it is at the telephoto end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 31 is a distortion curve of the zoom lens in Example 3 when it is at the telephoto end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • the zoom lens provided in Embodiment 3 has good imaging quality at both the wide-angle end and the telephoto end.
  • FIG. 33(a) is a schematic diagram of the zoom lens shown in FIG. 32 at the wide-angle end.
  • FIG. 33(b) is a schematic diagram of the zoom lens shown in FIG. 32 at the telephoto end.
  • the zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side.
  • the first lens group G1 is a lens group with positive refractive power
  • the second lens group G2 is a lens group with negative refractive power.
  • the first lens group G1 includes a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged along the object side to the image side.
  • the second lens group G2 includes a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged from the object side to the image side.
  • the zoom lens 21 further includes an aperture 211 disposed between the third lens L3 and the fourth lens L4.
  • Table 16 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 4, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm).
  • surface numbers 1-19 are along the direction from the object side to the image side, marking the surface of the subject, each lens, diaphragm, filter and imaging surface in order. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.
  • Table 17 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 4, that is, the corresponding variable interval d when the zoom lens is at the wide-angle end and the telephoto end.
  • Table 18 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 4.
  • Table 18 includes Table 18a, Table 18b, Table 18c, and Table 18d.
  • Table 19 shows the overall parameter data of the zoom lens in Example 4.
  • Table 20 shows the conditional expressions and corresponding data of the zoom lens in Example 4.
  • N in the table below is the number of lenses.
  • FIGS. 34 to 36 show relevant graphs at the wide-angle end of the zoom lens.
  • Figure 34 is an astigmatism curve when the zoom lens in Example 4 is at the wide-angle end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 35 is an on-axis chromatic aberration curve of the zoom lens in Example 4 when it is at the wide-angle end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 36 is a distortion curve of the zoom lens in Example 4 when it is at the wide-angle end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • FIGS. 37 to 39 show relevant graphs at the telephoto end of the zoom lens.
  • Figure 37 is an astigmatism curve when the zoom lens in Example 4 is at the telephoto end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 38 is an on-axis chromatic aberration curve of the zoom lens in Example 4 when it is at the telephoto end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 39 is a distortion curve of the zoom lens in Example 4 when it is at the telephoto end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • the zoom lens provided in Embodiment 4 has good imaging quality at both the wide-angle end and the telephoto end.
  • FIG. 41(a) is a schematic diagram of the zoom lens shown in FIG. 40 at the wide-angle end.
  • FIG. 41(b) is a schematic diagram of the zoom lens shown in FIG. 40 at the telephoto end.
  • the zoom lens 21 provided in this embodiment includes: a first lens group G1 and a second lens group G2 arranged along the object side to the image side.
  • the first lens group G1 is a lens group with positive refractive power
  • the second lens group G2 is a lens group with negative refractive power.
  • the first lens group G1 includes a first lens L1, a second lens L2, and a third lens L3 arranged from the object side to the image side.
  • the second lens group G2 includes a fourth lens L4, a fifth lens L5, and a sixth lens L6 arranged from the object side to the image side.
  • the zoom lens 21 further includes an aperture 211 disposed between the first lens L1 and the second lens L2.
  • Table 21 shows the relevant parameters of each lens, aperture, and filter of the zoom lens in Embodiment 5, including the radius of curvature R, the interval d, the refractive index Nd, and the Abbe coefficient Vd. Among them, the units of the radius of curvature R and the interval d are both millimeters (mm).
  • surface numbers 1-17 mark the surface of the subject, each lens, diaphragm, filter, and imaging surface in order along the direction from the object side to the image side. Among them, the photographed object is marked as OBJ, the aperture is marked as STO, and the imaging surface is marked as IMA.
  • Table 22 shows the variable interval d when the zoom lens changes from the wide-angle end to the telephoto end in Embodiment 5, that is, the variable interval d corresponding to when the zoom lens is at the wide-angle end and the telephoto end.
  • Table 23 shows the k value and aspheric coefficient of the aspheric mirror surface of each lens in Example 5.
  • Table 23 includes Table 23a, Table 23b, and Table 23c.
  • Table 24 shows the overall parameter data of the zoom lens in Example 5.
  • Table 25 shows the conditional expressions and corresponding data of the zoom lens in Example 5.
  • N in the table below is the number of lenses.
  • FIGS. 42 to 44 show relevant graphs at the wide-angle end of the zoom lens.
  • Figure 42 is an astigmatism curve when the zoom lens in Example 5 is at the wide-angle end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 43 is an on-axis chromatic aberration curve of the zoom lens in Example 5 when it is at the wide-angle end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 44 is a distortion curve of the zoom lens in Example 5 when it is at the wide-angle end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • FIGS. 45 to 47 show relevant graphs at the telephoto end of the zoom lens.
  • Figure 45 is an astigmatism curve when the zoom lens in Example 5 is at the telephoto end.
  • the dotted line in the figure represents the meridian, the solid line represents the sagittal, and the corresponding light wavelength is 587.6nm.
  • Figure 46 shows the axial chromatic aberration curve of the zoom lens in Example 5 when it is at the telephoto end.
  • the wavelength of light corresponding to the dotted line in the figure is 656.3nm
  • the wavelength of light corresponding to the solid line is 587.6nm
  • the wavelength of light corresponding to the dotted line is 486.1nm.
  • Figure 47 is a distortion curve of the zoom lens in Example 5 when it is at the telephoto end.
  • the corresponding light wavelength in the figure is 587.6nm.
  • the zoom lens provided in Embodiment 5 has good imaging quality at both the wide-angle end and the telephoto end.

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Abstract

本申请提供一种变焦镜头、摄像头模组及电子设备。所述变焦镜头包括：沿物侧到像侧排列的第一透镜组、第二透镜组；所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度；所述变焦镜头具有望远端和广角端，所述第一透镜组和所述第二透镜组均可沿光轴方向移动，以在所述望远端和所述广角端之间变焦切换；所述变焦镜头中至少有一枚透镜的临界点数量大于或等于2；所述变焦镜头的望远端满足关系式：3＜TTLt/ImgH＜5，所述变焦镜头的广角端满足关系式：0.25＜ImgH/fw＜0.47；其中，TTLt为所述变焦镜头处于所述望远端时的光学总长，ImgH为像高，fw为所述广角端的焦距。相较于混合光学变焦而言，本申请提供的变焦镜头应用于电子设备时可获得更高的成像质量。

Description

变焦镜头、摄像头模组及电子设备 技术领域
本申请涉及光学成像技术领域，具体涉及一种变焦镜头、摄像头模组及电子设备。
背景技术
近年来，随着智能手机的快速发展，消费者对手机的拍照性能的需求愈来愈高。例如更宽的变焦范围、更高的解析度、更高的成像质量等，这些需求对手机的镜头提出了更高的要求，单个焦段的镜头以及数码变焦的方式已经不能满足消费者的需求。目前市场上发布的手机镜头高倍光变基本都是“跳跃式”变焦，即通过分别搭载两到三颗不同焦距的镜头，搭配基于算法的数码变焦，实现混合光学变焦；但是跳跃式数码变焦是基于不同焦距的多个摄像头，依靠算法处理实现连续变焦，并不是实际上的连续变焦，其缺点在于在变焦过程中，数码变焦部分的成像清晰度有所下降，影响到了成像质量。
发明内容
本申请提供一种变焦镜头、摄像头模组及电子设备，相较于混合光学变焦而言，所述变焦镜头应用于电子设备时可获得更高的成像质量。
第一方面，本申请提供一种变焦镜头，所述变焦镜头包括：沿物侧到像侧排列的第一透镜组、第二透镜组；所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度；所述变焦镜头具有望远端和广角端，所述第一透镜组和所述第二透镜组均可沿光轴方向移动，以在所述望远端和所述广角端之间变焦切换；所述变焦镜头中至少有一枚透镜的临界点数量大于或等于2；所述变焦镜头的望远端满足关系式：3＜TTLt/ImgH＜5，所述变焦镜头的广角端满足关系式：0.25＜ImgH/fw＜0.47；其中，TTLt为所述变焦镜头处于所述望远端时的光学总长，ImgH为像高，fw为所述广角端的焦距。
第二方面，本申请还提供一种摄像头模组，所述摄像头模组包括感光元件及变焦镜头，所述变焦镜头可沿光轴方向相对所述感光元件运动。
第三方面，本申请还提供一种电子设备，所述电子设备包括设备本体及摄像头模组，所述设备本体具有开口，所述摄像头模组对应所述开口设置在所述设备本体内，所述摄像头模组的变焦镜头至少部分可通过所述开口伸出或缩回所述设备本体。
在本申请实施例提供的变焦镜头中，由于第一透镜组和第二透镜组可沿光轴方向移动，因而可通过移动第一透镜组和第二透镜组来实现变焦镜头在望远端和广角端之间变焦切换。相较于采用从属于不同焦段的镜头通过数码变焦来实现连续变焦(混合光学变焦)的形式而言，本申请提供的变焦镜头在望远端和广角端之间的变焦切换是连续的光学变焦，因而可以获得更高的成像质量。同时，本申请提供的变焦镜头相当于将多个焦段的镜头一体化，从而减少了镜头的数量，减小了空间占用，因此，变焦镜头可以配备更大尺寸的感光元件，从而提高成像质量。进一步的，由于所述变焦镜头满足关系式3＜TTLt/ImgH＜5，使得变焦镜头不至于过长，从而得以小型化。同时，由于变焦镜头的广角端满足关系式0.25＜ImgH/fw＜0.47，使得广角端的视场角处于28°～50°的范围内，从而可确保广角端的焦距处于中望远至望远的常用焦距范围之内。此外，当透镜具有2个或以上的临界点时，透镜在径向方向上的形状变化将较为平缓，从而可以避免透镜的厚度过大，进而减小透镜在物侧指向像侧方向上的所占用空间，以使得变焦镜头小型化，从而更有利于应用在具有轻薄化要求的电子设备上。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请一实施例提供的电子设备在一状态下的示意图；
图2为图1所示的电子设备在另一状态下的示意图；
图3为图2所示的电子设备的另一视角的示意图；
图4为本申请一实施例提供的包含第一承载件和第二承载件的变焦透镜的示意图；
图5为本申请一实施例提供的变焦镜头处于收缩状态的示意图；
图6为图5所示的变焦镜头处于广角端和望远端的示意图；
图7为本申请一实施例提供的具有临界点的透镜的示意图；
图8为本申请在实施例1中提供的变焦镜头处于收缩状态的示意图；
图9为图8所示的变焦镜头处于广角端和望远端的示意图；
图10为实施例1所示的变焦镜头处于广角端时的像散曲线；
图11为实施例1所示的变焦镜头处于广角端时的轴上色差曲线；
图12为实施例1所示的变焦镜头处于广角端时的畸变曲线；
图13为实施例1所示的变焦镜头处于望远端时的像散曲线；
图14为实施例1所示的变焦镜头处于望远端时的轴上色差曲线；
图15为实施例1所示的变焦镜头处于望远端时的畸变曲线；
图16为本申请在实施例2中提供的变焦镜头处于收缩状态的示意图；
图17为图16所示的变焦镜头处于广角端和望远端的示意图；
图18为实施例2所示的变焦镜头处于广角端时的像散曲线；
图19为实施例2所示的变焦镜头处于广角端时的轴上色差曲线；
图20为实施例2所示的变焦镜头处于广角端时的畸变曲线；
图21为实施例2所示的变焦镜头处于望远端时的像散曲线；
图22为实施例2所示的变焦镜头处于望远端时的轴上色差曲线；
图23为实施例2所示的变焦镜头处于望远端时的畸变曲线；
图24为本申请在实施例3中提供的变焦镜头处于收缩状态的示意图；
图25为图24所示的变焦镜头处于广角端和望远端的示意图；
图26为实施例3所示的变焦镜头处于广角端时的像散曲线；
图27为实施例3所示的变焦镜头处于广角端时的轴上色差曲线；
图28为实施例3所示的变焦镜头处于广角端时的畸变曲线；
图29为实施例3所示的变焦镜头处于望远端时的像散曲线；
图30为实施例3所示的变焦镜头处于望远端时的轴上色差曲线；
图31为实施例3所示的变焦镜头处于望远端时的畸变曲线；
图32为本申请在实施例4中提供的变焦镜头处于收缩状态的示意图；
图33为图32所示的变焦镜头处于广角端和望远端的示意图；
图34为实施例4所示的变焦镜头处于广角端时的像散曲线；
图35为实施例4所示的变焦镜头处于广角端时的轴上色差曲线；
图36为实施例4所示的变焦镜头处于广角端时的畸变曲线；
图37为实施例4所示的变焦镜头处于望远端时的像散曲线；
图38为实施例4所示的变焦镜头处于望远端时的轴上色差曲线；
图39为实施例4所示的变焦镜头处于望远端时的畸变曲线；
图40为本申请在实施例5中提供的变焦镜头处于收缩状态的示意图；
图41为图40所示的变焦镜头处于广角端和望远端的示意图；
图42为实施例5所示的变焦镜头处于广角端时的像散曲线；
图43为实施例5所示的变焦镜头处于广角端时的轴上色差曲线；
图44为实施例5所示的变焦镜头处于广角端时的畸变曲线；
图45为实施例5所示的变焦镜头处于望远端时的像散曲线；
图46为实施例5所示的变焦镜头处于望远端时的轴上色差曲线；
图47为实施例5所示的变焦镜头处于望远端时的畸变曲线。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有付出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本文中提及“实施例”或“实施方式”意味着，结合实施例或实施方式描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
请参照图1至图3，本申请提供一种电子设备100，所述电子设备100包括设备本体1及摄像头模组2。所述设备本体1具有开口K14，所述摄像头模组2对应所述开口K14设置在所述设备本体1内。所述摄像头模组2的变焦镜头21至少部分可通过所述开口K14伸出或缩回所述设备本体1。当用户需要拍摄时，可控制变焦镜头21通过开口K14伸出于设备本体1(如图2所示)。当用户不需要拍摄时，可控制变焦镜头21通过开口K14缩回于设备本体1内(如图1所示)。
其中，所述电子设备100可以是手机、平板电脑、笔记本电脑、可穿戴设备(如智能手表、手环、VR设备等)、电视机、电子阅读器等设备。
所述设备本体1是指电子设备100的主体部分，主体部分包括实现电子设备100主要功能的电子组件以及保护、承载这些电子组件的壳体。设备本体1可以包括显示屏11、中框12、后盖13(如图3所示)， 显示屏11和后盖13均连接于中框12，且设置于中框12的相背两侧，且中框12的侧面显露于后盖13与显示屏11之外。
需说明的是，根据实际需求，摄像头模组2可以设置于电子设备100的任意一侧，本申请对此不作限定。以手机为例，所述摄像头模组2可以设置于手机的正面、背面、侧面。其中，所谓正面是指手机具备显示屏11的一侧；所谓背面是指手机具备后盖13的一侧(如图3所示)；所谓侧面是指手机的中框12的环周侧。可以理解的是，电子设备100的类型不同，其正面、背面、侧面等称呼的定义可能不同，对于其它类型的电子设备100在此不一一详述。
进一步的，所述开口K14可开设在所述后盖13上(如图3所示)。在其他实施方式中，所述开口K14也可开设在所述显示屏11上；或者，所述开口K14开设在所述中框12上。当所述后盖13具有所述开口K14时，所述摄像头模组2为后置摄像头。当所述显示屏11上具有所述开口K14时，所述摄像模组为前置摄像头。可以理解的是，本实施方式中对所述设备本体1的介绍仅仅是所述摄像头模组2的一种应用场景的介绍，不应当理解为对本申请所提供的电子设备100的限定。
在相关技术中，随着人们对于具备拍摄功能的电子设备的成像质量的追求越来越高，比如，高画质、高像素，通常需要将摄像头模组中的感光元件以及镜头进行设计。例如，采用大底的感光元件，由于感光元件与镜头之间的距离不可调，因此，需要对应将镜头和感光元件之间的距离设计得较长。在视场角(Field ofVision，FOV)基本不变的情况下，镜头和感光元件之间的距离较长，意味着摄像头模组的总长也会较长。当摄像头模组应用于电子设备中时，带来的结果就是会使得电子设备机身越来越厚，不利于电子设备的轻薄化。换言之，对于轻薄化的电子设备而言，由于电子设备的厚度限制，摄像头模组的长度也会受限。而当摄像头模组的厚度受限时，由于感光元件与镜头之间的距离不可调，会导致摄镜头模组中的镜头到感光元件之间的距离受限。若设计摄镜头模组的厚度较厚，电子设备的厚度较薄，可能导致摄像头模组在电子设备的后盖上形成较厚的凸起。因此，相关技术中的摄像头模组应用于电子设备时无法实现电子设备的轻薄化和摄像头模组的高成像质量的兼容性。
在本申请实施例提供的电子设备100中，由于变焦镜头21可通过开口K14实现伸出或缩回设备本体1，从而可实现摄像头模组2具有较大焦距的同时，又不会影响电子设备100的厚度，进而解决电子设备100的轻薄化和摄像头模组2的高成像质量的不能兼容的问题。
请参照图4，本申请还提供一种摄像头模组2，所述摄像头模组2包括感光元件23及以下任意实施方式中所描述的变焦镜头21。所述变焦镜头21可沿光轴方向相对所述感光元件23运动。
可选的，所述摄像头模组2还包括滤光片22。所述变焦镜头21、滤光片22、感光元件23沿光轴X方向依次排布。在进行拍摄时，外界光线依次经过变焦镜头21、滤光片22，最后到达感光元件23。所述变焦镜头21的第一透镜组G1和第二透镜组G2可沿光轴X方向相对所述感光元件23运动。
其中，所述变焦镜头21用于收集被摄景物的光线，并将光线聚焦于感光元件23。所述滤光片22用于消除不必要的光线，以提高有效分辨率和彩色还原性。所述滤光片22可以但不仅限于为红外滤光片22。所述感光元件23(Sensor)也称为感光芯片或图像传感器，其用于接收穿过滤光片22的光线，并将光信号转换为电信号。感光元件23可以是电荷耦合器件(Charge CoupledDevice，CCD)，也可以是互补金属氧化物导体器件(Complementary Metal Oxide Semiconductor，CMOS)。感光元件23具有成像面S231，所述成像面S231为感光元件23上接收光线的靶面。
需说明的是，以下关于变焦镜头21的实施例中所涉及到的成像面S231、滤光片22，是用于辅助描述第一透镜组G1和第二透镜组G2的位置情况等，并非是指变焦镜头21包含具有成像面S231的感光元件23以及滤光片22。
下面结合附图详细介绍上述摄像头模组2中的变焦镜头21。
请参照图5，本申请还提供一种变焦镜头21，所述变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2。其中，物侧和像侧分别是指：以变焦镜头21为界，被摄物体所在的一侧为物侧，被摄物体形成的图像所在的一侧为像侧。因此，在进行拍摄时，光线首先经过更靠近物侧的第一透镜组G1，再经过更靠近像侧的第二透镜组G2。
所述第一透镜组G1具有正光焦度。所述第二透镜组G2具有负光焦度。其中，所述光焦度(focalpower)表征光学***(透镜或透镜组)偏折光线的能力。一般而言，光焦度也为像方焦距的倒数。光学***的光焦度为正，表示其对光线有汇聚作用。光学***的光焦度为负，表示其对光线有发散作用。
第一透镜组G1和第二透镜组G2均用于通过移动实现变焦，因而都可称之为变焦透镜组。
第一透镜组G1和第二透镜组G2两者中的任意一个为补偿透镜组。也就是说，第一透镜组G1为补偿透镜组，或者，第二透镜组G2为补偿透镜组。其中，所谓的补偿透镜组是指用于补偿像面位置，以使不同距离的被拍摄物的焦点落于成像面S231上的透镜组。
可选的，所述第一透镜组G1最像侧的透镜具有正光焦度。如此设置可使变焦镜头21提供更好的成像效果。其中，所谓最像侧的透镜是指第一透镜组G1中最靠近像侧的那一枚透镜。
请参照图6，在图6中，图6(a)为图5所示的变焦镜头处于广角端的示意图。图6(b)为图5所示的变 焦镜头处于望远端的示意图。所述变焦镜头21具有望远端和广角端。所述第一透镜组G1和所述第二透镜组G2均可沿光轴X方向移动，以在所述望远端和所述广角端之间变焦切换。其中，望远端是指所述变焦镜头21的焦距最大时的状态，望远端也可称之为望远状态。广角端是指所述变焦镜头21的焦距最小时的状态，广角端也可称之为广角状态。变焦镜头21处于望远端时第一透镜组G1和第二透镜组G2的所处位置不同于变焦镜头21处于广角端时第一透镜组G1和第二透镜组G2的位置。因此，望远端和广角端为变焦镜头21的两种不同的拍摄状态。
可选的，所述变焦镜头21的广角端满足关系式：0.25＜ImgH/fw＜0.47。其中，fw为所述广角端的焦距。
所述TTLt/ImgH可以为但不限于为0.26、0.27、0.28、0.29、0.30、0.31、0.32、0.35、0.37、0.38、0.386、0.41、0.43、0.46等。例如，ImgH为5.330mm，fw为17.15mm；或者ImgH为5.330mm，fw为14.5mm；或者ImgH为5.330mm，fw为17.1mm。
当变焦镜头21处于广角端时，其视场角θ与参数ImgH、fw存在以下关系：ImgH/fw＝tan(θ/2)，结合关系式0.25＜ImgH/fw＜0.47可以得到：2*arctan(0.25)<2*arctan(ImgH/fw)＝θ<2*arctan(0.47)，即28°<θ<50°，也就是说，广角端的视场角在28°～50°的范围内，从而可确保广角端的焦距处于中望远至望远的常用焦距范围之内，即广角端可作为望远镜头使用，而望远端则可作为超望远镜头使用。
相关技术中，少数高端手机上至少搭载了两个镜头，包括望远镜头、超望远镜头。望远镜头、超望远镜头分开独立设置，该设计形式首先会导致整个摄像头模组的体积较大，也会增加产品成本，此外，也会导致每个镜头仅能搭配小底的感光元件，从而会影响成像质量，也将使得成像质量提升受限。
在本申请实施例提供的变焦镜头21中，由于第一透镜组G1和第二透镜组G2均可沿光轴X方向移动，因而可通过移动第一透镜组G1和第二透镜组G2来实现变焦镜头21在望远端和广角端之间变焦切换。相较于相关技术而言，本实施例提供的变焦镜头21相当于将望远镜头和超望远镜头一体化，从而减少了镜头的数量，减小了空间占用，因此，变焦镜头21可以配备一个大底的感光元件23(比如采用1/1.56inch的感光元件23)，实现从广角端到望远端的5000万像素成像，从而提高成像质量(比如实现高像素拍摄、降低信噪比)。此外，由于本申请提供的变焦镜头21可实现从广角端到望远端的连续光学变焦拍摄，相较于采用从属于不同焦段的镜头通过数码变焦来实现连续变焦(混合光学变焦)的形式而言，可以获得更高的成像质量。
可选的，所述变焦镜头21的望远端满足关系式：3＜TTLt/ImgH＜5。其中，TTLt为所述变焦镜头21处于所述望远端时的光学总长。ImgH为像高，所述像高是指成像面S231有效像素区域对角线长的一半。需说明的是，所述光学总长是指第一透镜组G1最靠近物侧的表面至成像面S231的距离，以下涉及到光学总长的描述请参考此处。
所述TTLt/ImgH可以为但不限于为3.1、3.2、3.3、3.4、3.5、3.6、3.62、3.7、3.8、3.9、4.0、4.1、4.13、4.2、4.3、4.4、4.5、4.6、4.7、4.8、4.9等。例如，TTLt为23.572mm，ImgH为5.330mm；或者TTLt为23.791mm，ImgH为5.330mm；或者TTLt为24.500mm，ImgH为5.330mm。
将TTLt和ImgH的比值限定在大于3小于5的范围内，可确保变焦镜头21不至于过长，从而得以小型化，更适用于有轻薄化要求的电子设备100，比如手机。
在相关技术中，手机等具有轻薄化要求的电子设备上已应用可变焦的摄像头模组。具体来讲，由于变焦功能要求摄像头模组内的透镜可相对感光元件移动，因此，摄像头模组的总长度必然较长，一般而言大于电子设备的厚度。为了避免电子设备过厚，目前通常采用潜望式摄像头，且将潜望式摄像头的长度方向顺应电子设备的宽度方向(或长度方向)进行布置，即潜望式摄像头的长度方向与电子设备的厚度方向垂直设置。潜望式摄像头中设有棱镜，该棱镜用于接收并反射外界光线，以使反射后的光线沿潜望式摄像头的长度方向进行传播。然而，潜望式摄像头的光圈、周边亮度等规格也会受到棱镜的厚度的限制。
在本申请中，当变焦镜头21应用于电子设备100时，变焦镜头21可通过设备本体1上的开口K14伸出或缩回，使得第一透镜组G1和第二透镜组G2相对感光元件23运动，从而实现变焦。在该结构形式中不涉及棱镜，从而不会受到棱镜带来的限制，可以实现大光圈。因此，本申请提供的变焦镜头21可以提升成像质量。
可选的，请参照图7，所述变焦镜头21中至少有一枚透镜的临界点Q数量大于或等于2。换而言之，所述变焦镜头21包含至少一枚具有2个临界点Q或以上的透镜。其中，所述临界点Q是指透镜表面上，除与光轴X的交点外，与一垂直于光轴X的切面相切的切点。当透镜具有2个或以上的临界点Q时，透镜在径向方向上的形状变化将较为平缓，从而可以避免透镜的厚度过大，进而减小透镜在物侧指向像侧方向上的所占用空间，以使得变焦镜头21小型化，从而更有利于应用在具有轻薄化要求的电子设备100上。
请参照图5和图6，所述变焦镜头21还具有收缩状态，当所述变焦镜头21处于所述收缩状态时满足关系式：cTTL<TTLw且cTTL<TTLt。其中，cTTL为所述变焦镜头21处于所述收缩状态时的光学总长，TTLw为所述变焦镜头21处于所述广角端时的光学总长。TTLt为所述变焦镜头21处于所述望远端时的光学总长。换而言之，在上述三种状态中，当变焦镜头21处于收缩状态时的光学总长cTTL最短，小于望远 端和广角端对应的光学总长，因而cTTL为变焦镜头21的最小全长。因此，当用户需要拍摄时，则可以控制变焦镜头21伸长，以切换到广角端或望远端，当不需要拍摄时，则控制变焦镜头21缩短，以切换到收缩状态。结合前面实施例提供的电子设备100来讲，当变焦镜头21伸长以切换到广角端或望远端时，则通过开口K14伸出于电子设备100之外；当变焦镜头21缩短以切换到收缩状态时，变焦镜头21则缩回于电子设备100内。
进一步的，变焦镜头21满足：cTTL<TTLw<TTLt；也就是说，当变焦镜头21处于望远端时的光学总长TTLt大于变焦镜头21处于广角端时的光学总长TTLw，因而TTLt为变焦镜头21的最大全长。从变焦的角度来讲，所述变焦镜头21从所述收缩状态切换至所述广角端的过程中，所述第一透镜组G1沿光轴X往物侧方向移动(请参照图5和图6)。所述变焦镜头21从所述广角端到所述望远端的变焦过程中，所述第一透镜组G1沿光轴X向物侧移动，所述第二透镜组G2沿光轴X向物侧移动(请参照图6)。需说明的是，变焦镜头21从收缩状态切换至广角端的过程中，第二透镜组G2可以不动，也可以沿光轴X往物侧方向移动。
可选的，所述变焦镜头21的收缩状态满足关系式：1＜cTTL/ImgH＜2。其中，cTTL为所述变焦镜头21处于所述收缩状态时的光学总长，ImgH为像高。
其中，cTTL/ImgH可以但不仅限于为1.1、1.2、1.24、1.3、1.4、1.5、1.55、1.6、1.7、1.8、1.9等。例如，cTTL为9.640mm，ImgH为5.330mm；或者cTTL为9.910mm，ImgH为5.330mm；或者cTTL为10.400mm，ImgH为5.330mm。
由以上例举的数据可知，当ImgH的取值为5.330mm时，TTLt在20mm左右，cTTL在10mm左右，因此本申请提供的变焦镜头21可适用于具有轻薄化要求的电子设备100上，比如手机。这使得变焦镜头21不仅得以小型化，还可以有效的保持良好的光学性能。
可选的，当变焦镜头21处于收缩状态时，第一透镜组G1和第二透镜组G2都位于设备本体1内。
可选的，当变焦镜头21处于广角端时，第一透镜组G1至少部分位于设备本体1外。
可选的，当变焦镜头21处于广角端时，第二透镜组G2至少部分位于设备本体1内。
可选的，当变焦镜头21处于望远端时，第一透镜组G1位于设备本体1外，第二透镜组G2至少部分位于设备本体1外。
请参照图6，所述变焦镜头21还包括光阑211。所述光阑211设置于所述第一透镜组G1的物侧或者所述第一透镜组G1的内部或者所述第一透镜组G1的像侧。所述变焦镜头21在变焦过程中，所述光阑211跟随所述第一透镜组G1移动。换而言之，光阑211可以设置在第一透镜组G1的物侧或者像侧，也可以设置在组成第一透镜组G1的两枚相邻的透镜之间。光阑211与第一透镜组G1相对固定，在变焦过程中，光阑211与第一透镜组G1一起运动。由于第一透镜组G1中各透镜之间的排布较为稀疏，而第二透镜组G2中各透镜之间的排布较为紧密，因此，将光阑211固定于第一透镜组G1可以合理利用空间，且第一透镜组G1中各透镜的径向尺寸较小，因而光阑211更容易与第一透镜组G1固定在一起。
可选的，请参照图5和图6，所述变焦镜头21还包括第三透镜组G3，所述第三透镜组G3固定设置于所述第二透镜组G2的像侧。所述第三透镜组G3用于补正广角端和望远端的主光线入射角度(Chief Ray Angle，CRA)，CRA是Sensor的一个参数，光线需要以要求的角度入射到Sensor。对于变焦镜头21来说，需要广角端和望远端的CRA要一致。因此，第三透镜组G3用于确保变焦镜头21具有较好的成像质量。
可选的，所述第一透镜组G1中的透镜总数为3-5枚，即可以为3枚或4枚或5枚。
可选的，所述第二透镜组G2中的透镜总数为2-4枚，即可以为2枚或3枚或4枚。
可选的，当变焦镜头21包含第三透镜组G3时，所述第三透镜组G3中的透镜总数为1-2枚，即可以为1枚或2枚。
需说明的是，对于一枚透镜而言，第一透镜组G1、第二透镜组G2、第三透镜组G3中的每枚透镜可以为玻璃透镜或塑料透镜。每枚透镜可以具有正光焦度，也可以具有负光焦度。进一步的，透镜靠近物侧的表面称为物侧面，透镜靠近像侧的表面称为像侧面。上述三组透镜组中的每枚透镜的物侧面可以为球面、非球面等，同样，每枚透镜的像侧面可以为球面、非球面等。
可选的，请参照图4，所述变焦镜头21还包括第一承载件212和第二承载件213。所述第一承载件212可以套设于所述第二承载件213的外周。第一承载件212和第二承载件213均可沿光轴X方向相对运动。所述第一透镜组G1固定于第一承载件212内。所述第一承载件212用于带动第一透镜组G1沿光轴X相对感光元件23运动。第二透镜组G2固定于第二承载件213内。第二承载件213用于带动第二透镜组G2沿光轴X相对感光元件23运动。第一承载件212可以设于电子设备100的开口K14内，第一承载件212和第二承载件213可通过开口K14伸出或缩回电子设备100。当然，第一透镜组G1和第二透镜组G2的承载形式还可以是其它方式，图4所示的结构仅是示例性说明，不应视为对本申请的限定。
可选的，所述变焦镜头21满足关系式：-1＜f1/f2＜-0.5。其中，f1为所述第一透镜组G1的焦距，f2为所述第二透镜组G2的焦距。
f1/f2可以但不仅限于为-0.9、-0.8、-0.82、-0.7、-0.76、-0.6、-0.61等。例如，f1为15.491mm，f2为-18.653mm；或者f1为13.127mm，f2为-13.865mm；或者f1为12.372mm，f2为-15.689mm。
在本实施例中，将第一透镜组G1的焦距f1和第二透镜组G2的焦距f2的比值设置为大于-1小于-0.5，因而可以合理分配第一透镜组G1和第二透镜组G2的光焦度关系，更好地实现对焦与变焦。
可选的，所述变焦镜头21满足关系式：0.15＜Δd/TTLt＜0.5。其中，Δd为所述变焦镜头21在从所述广角端到所述望远端的变焦过程中，所述第一透镜组G1移动的距离；TTLt为所述变焦镜头21处于所述望远端时的光学总长。Δd/TTLt可以但不仅限于为0.16、0.17、0.19、0.2、0.21、0.26、0.3、0.32、0.4、0.45等。例如，Δd为5.861mm，TTLt为23.572mm；或者Δd为7.600mm，TTLt为23.791mm；或者Δd为7.072mm，TTLt为24.500mm。
在本实施例中，合理的将第一透镜组G1从广角端至望远端的移动距离与变焦镜头21的最大光学总长的比值设置在0.15和0.5之间，使得能够以较小的镜组间隔变化量实现较大的变倍比，从而有利于压缩变焦镜头21的总长。
可选的，所述变焦镜头21满足关系式：1.5<tan(hFOVw)/tan(hFOVt)。其中，hFOVw为所述变焦镜头21处于广角端时的半视场角，hFOVt为所述变焦镜头21处于望远端时的半视场角。其中，所述半视场角是指视场角(Field of Vision，FOV)的一半。所述视场角也可称之为画角，相应的，半视场角即为半画角。
tan(hFOVw)/tan(hFOVt)可以但不仅限于为1.6、1.71、1.8、1.9、2.0、2.1、2.2、2.25等。例如，hFOVw为16.973°，hFOVt为10.949°；或者hFOVw为20.641°，hFOVt为10.918°；或者hFOVw为16.930°，hFOVt为10.848°。
在本实施例中，通过将tan(hFOVw)与tan(hFOVt)的比值设置为大于1.5，从而使得变焦镜头21的变焦倍率在1.5倍以上。
可选的，所述变焦镜头21满足关系式：fw/ENPw＜3。其中，fw为所述广角端的焦距，ENPw为所述变焦镜头21处于所述广角端时的入射瞳直径。
fw/ENPw可以但不仅限于为2.9、2.86、2.7、2.6、2.5、2.4、2.3、2.26、2.2、2.18、2.1、2.0、1.98、1.9、1.8等。例如，fw为17.15mm，ENPw为6.888mm；或者fw为14.5mm，ENPw为6.042mm；或者fw为17.1mm，ENPw为6.333mm。
在本实施例中，通过将广角端焦距和广角端的入射瞳直径的比值设定为小于3，使得广角端的光圈在3以下，从而可以提高镜头的亮度和虚化效果。其中，镜头的亮度提高，进入镜头的光线量就越多，也即代表夜晚也能清晰成像。
可选的，对于以上任意实施例中，所述变焦镜头21中的透镜总数N满足：5≤N≤10。透镜总数N可以为5、或6、或7、或8、或9、或10。例如，第一透镜组G1中的透镜总数为4枚，第二透镜L2中的透镜总数为3枚，第三透镜组G3中的透镜总数为0枚。或者，第一透镜组G1中的透镜总数为4枚，第二透镜L2中的透镜总数为3枚，第三透镜组G3中的透镜总数为1枚。
当变焦透镜中的透镜数目越多时，所述变焦镜头21的成像效果越好。当变焦透镜中的透镜数目越少时，成本更低，最小光学总长cTTL更小。当透镜总数N小于5时，成像品质不能保证；当透镜总数N大于10时，变焦镜头21的光学总长太大，不适于应用在具有轻薄化要求的电子设备100上。本申请实施例兼顾成像品质和光学总长而将透镜总数选取为5至10之间，从而可以确保变焦镜头21具有较好成像效果的同时又能实现变焦镜头21小型化的有益效果。
需说明的是，本申请提供的变焦镜头21的广角端和望远端只是相对而言，并非是指广角端相当于广角镜头，而是指广角端的焦距小于望远端的焦距，且广角端的视场角大于望远端的视场角，因而区分广角端和望远端。在本申请中，广角端用于望远，可相当于望远镜头，而望远端用于超望远，可相当于超望远镜头。
应用本申请提供的变焦镜头21，变焦镜头21的最大光学总长TTLt可控制在26.65mm以下(比如20mm)。变焦镜头21在不使用时的收缩状态的光学总长cTTL可控制在10.66mm以下(比如10mm)。广角端的视场角可实现在50度以下。望远端的视场角可实现小于26度(比如在21°左右)。因此，本申请提供的变焦镜头21不仅可以很好的适应于具有轻薄化要求的电子设备100上，同时又兼备很好的拍摄性能。
以下通过三组具体的实施例对本申请提供的变焦镜头21做更进一步的说明。在以下各实施例中，各非球面计算公式为：
Figure PCTCN2022104938-appb-000001
其中，x为非球面沿光轴方向在高度为h的位置时，距非球面顶点的距离矢高；c为非球面的近轴曲率，c＝1/R(即，近轴曲率c为以下表格中曲率半径R的倒数)；k为圆锥系数(请参见表格)；Ai为第i阶非球面系数。
实施例1
请参照图8和图9，在图9中，图9(a)为图8所示的变焦镜头处于广角端的示意图。图9(b)为图8所示的变焦镜头处于望远端的示意图。本实施例提供的变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2。所述第一透镜组G1为具有正光焦度的透镜组，所述第二透镜组G2为具有负光焦度的透镜组。其中，第一透镜组G1包括沿物侧到像侧排列的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4。第二透镜组G2包括沿物侧到像侧排列的第五透镜L5、第六透镜L6、第七透镜L7。变焦镜头21还包括光阑211，所述光阑211设置于第二透镜L2和第三透镜L3之间。
关于实施例1提供的变焦镜头的具体数据请参照表1至表5。
表1为实施例1中变焦镜头的各透镜、光阑、滤光片的相关参数，包括曲率半径R、间隔d、折射率Nd、阿贝系数Vd。其中，曲率半径R、间隔d的单位均为毫米(mm)。在表1中，表面序号1-19为沿物侧至像侧方向，依次标记被拍摄物、各透镜、光阑、滤光片的表面及成像面。其中，被拍摄物记为OBJ，光阑记为STO，成像面记为IMA。
需说明的是，间隔d代表当前表面与后一表面沿光轴的间隔距离为d。例如，表1中的表面2与表面3的间隔为1.496，表面3与表面4的间隔为0.367。后文涉及到间隔d的地方请参考此处。
Figure PCTCN2022104938-appb-000002
表2为实施例1中变焦镜头从广角端变化至望远端时的可变间隔d，即变焦镜头处于广角端和望远端时所对应的可变间隔d。
Figure PCTCN2022104938-appb-000003
表3为实施例1中各透镜的非球面镜面的k值和非球面系数，表3包括表3a、表3b、表3c、表3d。
Figure PCTCN2022104938-appb-000004
Figure PCTCN2022104938-appb-000005
Figure PCTCN2022104938-appb-000006
Figure PCTCN2022104938-appb-000007
Figure PCTCN2022104938-appb-000008
表4为实施例1中变焦镜头的总体参数数据。
Figure PCTCN2022104938-appb-000009
Figure PCTCN2022104938-appb-000010
表5为实施例1中变焦镜头的条件式及对应的数据。下表中N为透镜的数量。
Figure PCTCN2022104938-appb-000011
在本实施例中，通过改变第一透镜组G1和第二透镜组G2沿光轴X上的间隔d1(即，第四透镜L4的像侧面和第五透镜L5的物侧面在沿光轴X的间隔距离)，以及第二透镜组G2和滤光片22沿光轴X上的间隔d2(即，第七透镜L7的像侧面至滤光片22的物侧面沿光轴X的间隔距离)来实现变焦镜头21组在望远端、广角端、收缩状态之间切换。
请参照图10至图12，图10至图12示出了变焦镜头的广角端的相关曲线图。
图10为实施例1中变焦镜头处于广角端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图11为实施例1中变焦镜头处于广角端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图12为实施例1中变焦镜头处于广角端时的畸变曲线。图中对应光线波长为587.6nm。
请参照图13至图15，图13至图15示出了变焦镜头的望远端的相关曲线图。
图13为实施例1中变焦镜头处于望远端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图14为实施例1中变焦镜头处于望远端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图15为实施例1中变焦镜头处于望远端时的畸变曲线。图中对应光线波长为587.6nm。
根据图10至图15可以看出，实施例1所给出的变焦镜头在广角端和望远端均具备较好的成像品质。
实施例2
请参照图16和图17，在图17中，图17(a)为图16所示的变焦镜头处于广角端的示意图。图17(b)为图16所示的变焦镜头处于望远端的示意图。本实施例提供的变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2。所述第一透镜组G1为具有正光焦度的透镜组，所述第二透镜组G2为具有负光焦度的透镜组。其中，第一透镜组G1包括沿物侧到像侧排列的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4。第二透镜组G2包括沿物侧到像侧排列的第五透镜L5、第六透镜L6、第七透镜L7。变焦镜头21还包括光阑211，所述光阑211设置于第三透镜L3和第四透镜L4之间。
关于实施例2提供的变焦镜头的具体数据请参照表6至表10。
表6为实施例2中变焦镜头的各透镜、光阑、滤光片的相关参数，包括曲率半径R、间隔d、折射率Nd、阿贝系数Vd。其中，曲率半径R、间隔d的单位均为毫米(mm)。在表6中，表面序号1-19为沿物侧至像侧方向，依次标记被拍摄物、各透镜、光阑、滤光片的表面及成像面。其中，被拍摄物记为OBJ，光阑记为STO，成像面记为IMA。
Figure PCTCN2022104938-appb-000012
表7为实施例2中变焦镜头从广角端变化至望远端时的可变间隔d，即变焦镜头处于广角端和望远端时所对应的可变间隔d。
Figure PCTCN2022104938-appb-000013
表8为实施例2中各透镜的非球面镜面的k值和非球面系数，表8包括表8a、表8b、表8c、表8d。
Figure PCTCN2022104938-appb-000014
Figure PCTCN2022104938-appb-000015
Figure PCTCN2022104938-appb-000016
Figure PCTCN2022104938-appb-000017
Figure PCTCN2022104938-appb-000018
表9为实施例2中变焦镜头的总体参数数据。
Figure PCTCN2022104938-appb-000019
Figure PCTCN2022104938-appb-000020
表10为实施例2中变焦镜头的条件式及对应的数据。下表中N为透镜的数量。
Figure PCTCN2022104938-appb-000021
在本实施例中，通过改变第一透镜组G1和第二透镜组G2沿光轴X上的间隔d1(即，第四透镜L4的像侧面和第五透镜L5的物侧面在沿光轴X的间隔距离)，以及第二透镜组G2和滤光片22沿光轴X上的间隔d2(即，第七透镜L7的像侧面至滤光片22的物侧面沿光轴X的间隔距离)来实现变焦镜头21组在望远端、广角端、收缩状态之间切换。
请参照图18至图20，图18至图20示出了变焦镜头的广角端的相关曲线图。
图18为实施例2中变焦镜头处于广角端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图19为实施例2中变焦镜头处于广角端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图20为实施例2中变焦镜头处于广角端时的畸变曲线。图中对应光线波长为587.6nm。
请参照图21至图23，图21至图23示出了变焦镜头的望远端的相关曲线图。
图21为实施例2中变焦镜头处于望远端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图22为实施例2中变焦镜头处于望远端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图23为实施例2中变焦镜头处于望远端时的畸变曲线。图中对应光线波长为587.6nm。
根据图18至图23可以看出，实施例2所给出的变焦镜头在广角端和望远端均具备较好的成像品质。
实施例3
请参照图24和图25，在图25中，图25(a)为图24所示的变焦镜头处于广角端的示意图。图25(b)为图24所示的变焦镜头处于望远端的示意图。本实施例提供的变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2、第三透镜组G3。所述第一透镜组G1为具有正光焦度的透镜组，所述第二透 镜组G2为具有负光焦度的透镜组。其中，第一透镜组G1包括沿物侧到像侧排列的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4。第二透镜组G2包括沿物侧到像侧排列的第五透镜L5、第六透镜L6、第七透镜L7。第三透镜组G3包括第八透镜L8。变焦镜头21还包括光阑211，所述光阑211设置于第三透镜L3和第四透镜L4之间。
关于实施例3提供的变焦镜头的具体数据请参照表11至表15。
表11为实施例3中变焦镜头的各透镜、光阑、滤光片的相关参数，包括曲率半径R、间隔d、折射率Nd、阿贝系数Vd。其中，曲率半径R、间隔d的单位均为毫米(mm)。在表11中，表面序号1-21为沿物侧至像侧方向，依次标记被拍摄物、各透镜、光阑、滤光片的表面及成像面。其中，被拍摄物记为OBJ，光阑记为STO，成像面记为IMA。
Figure PCTCN2022104938-appb-000022
表12为实施例3中变焦镜头从广角端变化至望远端时的可变间隔d，即变焦镜头处于广角端和望远端时所对应的可变间隔d。
Figure PCTCN2022104938-appb-000023
表13为实施例3中各透镜的非球面镜面的k值和非球面系数，表13包括表13a、表13b、表13c、表13d。
Figure PCTCN2022104938-appb-000024
Figure PCTCN2022104938-appb-000025
Figure PCTCN2022104938-appb-000026
Figure PCTCN2022104938-appb-000027
Figure PCTCN2022104938-appb-000028
表14为实施例3中变焦镜头的总体参数数据。
Figure PCTCN2022104938-appb-000029
Figure PCTCN2022104938-appb-000030
表15为实施例3中变焦镜头的条件式及对应的数据。下表中N为透镜的数量。
Figure PCTCN2022104938-appb-000031
在本实施例中，通过改变第一透镜组G1和第二透镜组G2沿光轴X上的间隔d1(即，第四透镜L4的像侧面和第五透镜L5的物侧面在沿光轴X的间隔距离)，以及第二透镜组G2和第三透镜组G3沿光轴X上的间隔d2(即，第七透镜L7的像侧面至第八透镜L8的物侧面沿光轴X的间隔距离)来实现变焦镜头21组在望远端、广角端、收缩状态之间切换。
请参照图26至图28，图26至图28示出了变焦镜头的广角端的相关曲线图。
图26为实施例3中变焦镜头处于广角端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图27为实施例3中变焦镜头处于广角端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图28为实施例3中变焦镜头处于广角端时的畸变曲线。图中对应光线波长为587.6nm。
请参照图29至图31，图29至图31示出了变焦镜头的望远端的相关曲线图。
图29为实施例3中变焦镜头处于望远端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图30为实施例3中变焦镜头处于望远端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图31为实施例3中变焦镜头处于望远端时的畸变曲线。图中对应光线波长为587.6nm。
根据图26至图31可以看出，实施例3所给出的变焦镜头在广角端和望远端均具备较好的成像品质。
实施例4
请参照图32和图33，在图33中，图33(a)为图32所示的变焦镜头处于广角端的示意图。图33(b)为图32所示的变焦镜头处于望远端的示意图。本实施例提供的变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2。所述第一透镜组G1为具有正光焦度的透镜组，所述第二透镜组G2为具有负光焦度的透镜组。其中，第一透镜组G1包括沿物侧到像侧排列的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4。第二透镜组G2包括沿物侧到像侧排列的第五透镜L5、第六透镜L6、第七透镜L7。变焦镜头21还包括光阑211，所述光阑211设置于第三透镜L3和第四透镜L4之间。
关于实施例4提供的变焦镜头的具体数据请参照表16至表20。
表16为实施例4中变焦镜头的各透镜、光阑、滤光片的相关参数，包括曲率半径R、间隔d、折射率Nd、阿贝系数Vd。其中，曲率半径R、间隔d的单位均为毫米(mm)。在表16中，表面序号1-19为沿物侧至像侧方向，依次标记被拍摄物、各透镜、光阑、滤光片的表面及成像面。其中，被拍摄物记为OBJ，光阑记为STO，成像面记为IMA。
Figure PCTCN2022104938-appb-000032
表17为实施例4中变焦镜头从广角端变化至望远端时的可变间隔d，即变焦镜头处于广角端和望远端时所对应的可变间隔d。
Figure PCTCN2022104938-appb-000033
表18为实施例4中各透镜的非球面镜面的k值和非球面系数，表18包括表18a、表18b、表18c、表18d。
Figure PCTCN2022104938-appb-000034
Figure PCTCN2022104938-appb-000035
Figure PCTCN2022104938-appb-000036
Figure PCTCN2022104938-appb-000037
Figure PCTCN2022104938-appb-000038
表19为实施例4中变焦镜头的总体参数数据。
Figure PCTCN2022104938-appb-000039
Figure PCTCN2022104938-appb-000040
表20为实施例4中变焦镜头的条件式及对应的数据。下表中N为透镜的数量。
Figure PCTCN2022104938-appb-000041
在本实施例中，通过改变第一透镜组G1和第二透镜组G2沿光轴X上的间隔d1(即，第四透镜L4的像侧面和第五透镜L5的物侧面在沿光轴X的间隔距离)，以及第二透镜组G2和滤光片22沿光轴X上的间隔d2(即，第七透镜L7的像侧面至滤光片22的物侧面沿光轴X的间隔距离)来实现变焦镜头21组在望远端、广角端、收缩状态之间切换。
请参照图34至图36，图34至图36示出了变焦镜头的广角端的相关曲线图。
图34为实施例4中变焦镜头处于广角端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图35为实施例4中变焦镜头处于广角端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图36为实施例4中变焦镜头处于广角端时的畸变曲线。图中对应光线波长为587.6nm。
请参照图37至图39，图37至图39示出了变焦镜头的望远端的相关曲线图。
图37为实施例4中变焦镜头处于望远端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图38为实施例4中变焦镜头处于望远端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图39为实施例4中变焦镜头处于望远端时的畸变曲线。图中对应光线波长为587.6nm。
根据图34至图39可以看出，实施例4所给出的变焦镜头在广角端和望远端均具备较好的成像品质。
实施例5
请参照图40和图41，在图41中，图41(a)为图40所示的变焦镜头处于广角端的示意图。图41(b)为图40所示的变焦镜头处于望远端的示意图。本实施例提供的变焦镜头21包括：沿物侧到像侧排列的第一透镜组G1、第二透镜组G2。所述第一透镜组G1为具有正光焦度的透镜组，所述第二透镜组G2为具有负光焦度的透镜组。其中，第一透镜组G1包括沿物侧到像侧排列的第一透镜L1、第二透镜L2、第三透镜L3。第二透镜组G2包括沿物侧到像侧排列的第四透镜L4、第五透镜L5、第六透镜L6。变焦镜头21还包括光阑211，所述光阑211设置于第一透镜L1和第二透镜L2之间。
关于实施例5提供的变焦镜头的具体数据请参照表21至表25。
表21为实施例5中变焦镜头的各透镜、光阑、滤光片的相关参数，包括曲率半径R、间隔d、折射率Nd、阿贝系数Vd。其中，曲率半径R、间隔d的单位均为毫米(mm)。在表21中，表面序号1-17为沿物侧至像侧方向，依次标记被拍摄物、各透镜、光阑、滤光片的表面及成像面。其中，被拍摄物记为OBJ，光阑记为STO，成像面记为IMA。
Figure PCTCN2022104938-appb-000042
表22为实施例5中变焦镜头从广角端变化至望远端时的可变间隔d，即变焦镜头处于广角端和望远端时所对应的可变间隔d。
Figure PCTCN2022104938-appb-000043
表23为实施例5中各透镜的非球面镜面的k值和非球面系数，表23包括表23a、表23b、表23c。
Figure PCTCN2022104938-appb-000044
Figure PCTCN2022104938-appb-000045
Figure PCTCN2022104938-appb-000046
Figure PCTCN2022104938-appb-000047
表24为实施例5中变焦镜头的总体参数数据。
Figure PCTCN2022104938-appb-000048
表25为实施例5中变焦镜头的条件式及对应的数据。下表中N为透镜的数量。
Figure PCTCN2022104938-appb-000049
在本实施例中，通过改变第一透镜组G1和第二透镜组G2沿光轴X上的间隔d1(即，第三透镜L3的像侧面和第四透镜L4的物侧面在沿光轴X的间隔距离)，以及第二透镜组G2和滤光片22沿光轴X上的间隔d2(即，第六透镜L6的像侧面至滤光片22的物侧面沿光轴X的间隔距离)来实现变焦镜头21组在望远端、广角端、收缩状态之间切换。
请参照图42至图44，图42至图44示出了变焦镜头的广角端的相关曲线图。
图42为实施例5中变焦镜头处于广角端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图43为实施例5中变焦镜头处于广角端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图44为实施例5中变焦镜头处于广角端时的畸变曲线。图中对应光线波长为587.6nm。
请参照图45至图47，图45至图47示出了变焦镜头的望远端的相关曲线图。
图45为实施例5中变焦镜头处于望远端时的像散曲线。图中虚线表示子午，实线表示弧矢，对应光线波长为587.6nm。
图46为实施例5中变焦镜头处于望远端时的轴上色差曲线。图中圆点线对应的光线波长为656.3nm，实线对应的光线波长为587.6nm，虚线对应的光线波长为486.1nm。
图47为实施例5中变焦镜头处于望远端时的畸变曲线。图中对应光线波长为587.6nm。
根据图42至图47可以看出，实施例5所给出的变焦镜头在广角端和望远端均具备较好的成像品质。
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型，这些改进和润饰也视为本申请的保护范围。

Claims (19)

  1. 一种变焦镜头，其特征在于，所述变焦镜头包括：沿物侧到像侧排列的第一透镜组、第二透镜组；所述第一透镜组具有正光焦度，所述第二透镜组具有负光焦度；所述变焦镜头具有望远端和广角端，所述第一透镜组和所述第二透镜组均可沿光轴方向移动，以在所述望远端和所述广角端之间变焦切换；所述变焦镜头中至少有一枚透镜的临界点数量大于或等于2；所述变焦镜头的望远端满足关系式：3＜TTLt/ImgH＜5，所述变焦镜头的广角端满足关系式：0.25＜ImgH/fw＜0.47；其中，TTLt为所述变焦镜头处于所述望远端时的光学总长，ImgH为像高，fw为所述广角端的焦距。
  2. 如权利要求1所述的变焦镜头，其特征在于，所述变焦镜头还具有收缩状态，当所述变焦镜头处于所述收缩状态时满足关系式：cTTL<TTLw且cTTL<TTLt，其中，cTTL为所述变焦镜头处于所述收缩状态时的光学总长，TTLw为所述变焦镜头处于所述广角端时的光学总长。
  3. 如权利要求2所述的变焦镜头，其特征在于，所述变焦镜头的收缩状态满足关系式：1＜cTTL/ImgH＜2。
  4. 如权利要求2所述的变焦镜头，其特征在于，所述变焦镜头从所述收缩状态切换至所述广角端的过程中，所述第一透镜组沿光轴往物侧方向移动。
  5. 如权利要求1所述的变焦镜头，其特征在于，所述变焦镜头从所述广角端到所述望远端的变焦过程中，所述第一透镜组沿光轴向物侧移动，所述第二透镜组沿光轴向物侧移动。
  6. 如权利要求1所述的变焦镜头，其特征在于，所述变焦镜头还包括光阑，所述光阑设置于所述第一透镜组的物侧或者所述第一透镜组的内部或者所述第一透镜组的像侧，所述变焦镜头在变焦过程中，所述光阑跟随所述第一透镜组移动。
  7. 如权利要求1所述的变焦镜头，其特征在于，所述变焦镜头还包括第三透镜组，所述第三透镜组固定设置于所述第二透镜组的像侧。
  8. 如权利要求7所述的变焦镜头，其特征在于，所述第三透镜组中的透镜总数为1-2枚。
  9. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述第一透镜组中的透镜总数为3-5枚；和/或，所述第二透镜组中的透镜总数为2-4枚。
  10. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头满足关系式：-1＜f1/f2＜-0.5，其中，f1为所述第一透镜组的焦距，f2为所述第二透镜组的焦距。
  11. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头满足关系式：0.15＜Δd/TTLt＜0.5，其中，Δd为所述变焦镜头在从所述广角端到所述望远端的变焦过程中，所述第一透镜组移动的距离。
  12. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头满足关系式：1.5<tan(hFOVw)/tan(hFOVt)，其中，hFOVw为所述变焦镜头处于广角端时的半视场角，hFOVt为所述变焦镜头处于望远端时的半视场角。
  13. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头满足关系式：fw/ENPw＜3，其中，fw为所述广角端的焦距，ENPw为所述变焦镜头处于所述广角端时的入射瞳直径。
  14. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述第一透镜组最像侧的透镜具有正光焦度。
  15. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头中的透镜总数N满足：5≤N≤10。
  16. 如权利要求1-8任意一项所述的变焦镜头，其特征在于，所述变焦镜头还包括第一承载件和第二承载件，所述第一承载件套设于所述第二承载件的外周，所述第一承载件和所述第二承载件均可沿光轴方向运动，所述第一透镜组固定于所述第一承载件内，所述第二透镜组固定于所述第二承载件内。
  17. 一种摄像头模组，其特征在于，所述摄像头模组包括感光元件及如权利要求1-16任意一项所述的变焦镜头，所述变焦镜头可沿光轴方向相对所述感光元件运动。
  18. 如权利要求17所述的摄像头模组，其特征在于，所述摄像头模组还包括滤光片，所述变焦镜头、所述滤光片、所述感光元件沿光轴方向依次排布。
  19. 一种电子设备，其特征在于，所述电子设备包括设备本体及如权利要求17-18任意一项所述的摄像头模组，所述设备本体具有开口，所述摄像头模组对应所述开口设置在所述设备本体内，所述摄像头模组的变焦镜头至少部分可通过所述开口伸出或缩回所述设备本体。
PCT/CN2022/104938 2022-07-11 2022-07-11 变焦镜头、摄像头模组及电子设备 WO2024011358A1 (zh)

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US4781447A (en) * 1986-10-22 1988-11-01 Ricoh Company, Ltd. Ultra compact zoom lens
JPH0248623A (ja) * 1988-08-11 1990-02-19 Canon Inc 有限距離用ズームレンズ
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