Zoom lens, camera module and electronic equipment

Abstract

The invention provides a zoom lens, a camera module and electronic equipment. The zoom lens comprises a first lens group, a second lens group and a third lens group which are sequentially arranged from an object side to an image side along an optical axis, the zoom lens is provided with a wide-angle end and a telephoto end, and the second lens group and the third lens group can move along the optical axis so that the zoom lens can be switched between the wide-angle end and the telephoto end in a zooming mode to achieve continuous zooming. The zoom lens further comprises a first reflecting part and a second reflecting part, the first lens group comprises a first lens and a second lens, the first lens is arranged on the object side of the first reflecting part, the second lens is arranged on the image side of the first reflecting part, and the first reflecting part is used for reflecting light from the first lens to the second lens. The second reflector is arranged on the image side of the third lens group, and the second reflector is used for reflecting the light from the third lens group to the photosensitive element. The zoom lens provided by the invention can ensure good imaging quality in the zooming process.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to a zoom lens, a camera module and an electronic device. Background Art

[0002] In recent years, with the rapid development of smart phones, consumers have increasingly higher demands on the camera performance of mobile phones. For example, a wider zoom range, higher resolution, higher image quality, etc. These demands have put forward higher requirements on the lenses of mobile phones. Lenses with a single focal length and digital zoom methods can no longer meet the needs of consumers. Currently, the high-magnification optical zoom of mobile phone lenses released on the market are basically "jump-type" zoom, that is, by carrying two or three lenses with different focal lengths, respectively, and matching algorithm-based digital zoom, hybrid optical zoom is achieved; however, the jump-type digital zoom is based on multiple cameras with different focal lengths, and relies on algorithm processing to achieve continuous zoom, which is not actually continuous zoom. Its disadvantage is that during the zooming process, the image clarity of the disconnected parts outside the focal length range of the multiple cameras is reduced compared to the continuous optical zoom, which affects the image quality. Summary of the invention

[0003] The present application provides a zoom lens, a camera module and an electronic device that can ensure good imaging quality during the zooming process.

[0004] In a first aspect, the present application provides a zoom lens, comprising: a first lens group, a second lens group, and a third lens group, which are arranged in sequence from the object side to the image side along the optical axis, the zoom lens has a wide-angle end and a telephoto end, the second lens group and the third lens group can be moved along the optical axis so that the zoom lens can switch between the wide-angle end and the telephoto end to achieve continuous zooming, the zoom lens also comprises a first reflector and a second reflector, the first lens group comprises a first lens and a second lens, the first lens is arranged on the object side of the first reflector, the second lens is arranged on the image side of the first reflector, the first reflector is used to reflect light from the first lens to the second lens, the second reflector is arranged on the image side of the third lens group, and the second reflector is used to reflect light from the third lens group to a photosensitive element.

[0005] In a second aspect, the present application also provides a camera module, which includes a photosensitive element and a zoom lens, and the photosensitive element is used to receive light from the zoom lens.

[0006] In a third aspect, the present application also provides an electronic device, which includes a device body and a camera module, wherein the camera module is installed on the device body.

[0007] In the zoom lens provided in the embodiment of the present application, since the first lens group and the second lens group can both move along the optical axis direction, the zoom lens can be switched between the telephoto end and the wide-angle end by moving the first lens group and the second lens group. Compared with the related art, the zoom lens provided in the present embodiment is equivalent to integrating multiple lenses with different focal lengths. During the switching process between the telephoto end and the wide-angle end, the zoom lens is always continuously optically zoomed, so that the zoom lens can always be high-quality imaging without quality degradation. In addition, the integration of the lens can reduce the overall volume of the camera module, reduce costs, and can be matched with a large-bottom photosensitive element, thereby improving the imaging quality (such as achieving high-pixel shooting and reducing the signal-to-noise ratio). In addition, the zoom lens provided in the embodiment of the present application is also provided with a first reflector and a second reflector, and the first reflector is used to change the propagation path of the light so that the light path is bent, so that the length direction of the camera module can be consistent with the length direction or width direction of the electronic device, so that it will not affect the thickness design of the electronic device. In other words, it is conducive to making the electronic device thinner. Furthermore, by arranging the first reflector between the first lens and the second lens, the thickness of the lens behind the first reflector can be reduced, which is conducive to the miniaturization of the zoom lens. Secondly, the second reflector can also deflect the light path, and the overall length of the camera module can be reduced after the second reflector is arranged. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 A schematic diagram of an electronic device provided in an embodiment of the present application.

[0010] Figure 2 for Figure 1 A schematic diagram of the electronic device shown is shown from another perspective.

[0011] Figure 3 A schematic diagram of a camera module provided in an embodiment of the present application.

[0012] Figure 4 A schematic diagram of a zoom lens provided in an embodiment of the present application at a wide-angle end.

[0013] Figure 5 A schematic diagram of a zoom lens provided in an embodiment of the present application at the telephoto end.

[0014] Figure 6A schematic diagram of a zoom lens provided in an embodiment of the present application at an intermediate end.

[0015] Figure 7 FIG. 1 is a schematic diagram of a zoom lens provided in another embodiment of the present application.

[0016] Figure 8 It is a schematic diagram of a zoom lens provided in yet another embodiment of the present application.

[0017] Fig. 9 It is a schematic diagram of a zoom lens provided in yet another embodiment of the present application.

[0018] Fig.10 It is a schematic diagram of a zoom lens provided in yet another embodiment of the present application.

[0019] Fig.11 Schematic diagram of the zoom lens provided in Example 1 of the present application at the wide-angle end, the middle section, and the telephoto end.

[0020] Fig.12 Schematic diagram of light propagation when the zoom lens provided in Example 1 of the present application is at the wide-angle end, middle section, and telephoto end.

[0021] Fig.13 This is an astigmatism diagram when the zoom lens is at the wide-angle end in Example 1.

[0022] Fig.14 4 is a spherical aberration diagram of the zoom lens in Example 1 when it is at the wide-angle end.

[0023] Fig.15 1 is a distortion diagram when the zoom lens is at the wide-angle end in Example 1.

[0024] Fig.16 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the wide-angle end in Example 1.

[0025] Fig.17 This is an astigmatism diagram when the zoom lens is at the middle end in Example 1.

[0026] Fig.18 This is a spherical aberration diagram when the zoom lens is at the middle end in Example 1.

[0027] Fig.19 This is a distortion diagram when the zoom lens is at the middle end in Example 1.

[0028] Fig. 20 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the middle end in Example 1.

[0029] Fig.21 1 is an astigmatism diagram when the zoom lens is at the telephoto end in Example 1.

[0030] Fig. 22 4 is a spherical aberration diagram of the zoom lens in Example 1 when it is at the telephoto end.

[0031] Fig.23 1 is a distortion diagram when the zoom lens is at the telephoto end in Example 1.

[0032] Fig.24 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the telephoto end in Example 1.

[0033] Fig.25 Schematic diagram of the zoom lens provided in Example 2 of the present application at the wide-angle end, the middle section, and the telephoto end.

[0034] Fig.26 Schematic diagram of light propagation when the zoom lens provided in Example 2 of the present application is at the wide-angle end, middle section, and telephoto end.

[0035] Fig. 27 This is an astigmatism diagram when the zoom lens is at the wide-angle end in Example 2.

[0036] Fig.28 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 2.

[0037] Fig.29 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 2.

[0038] Fig.30 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the wide-angle end in Example 2.

[0039] Fig.31 This is an astigmatism diagram when the zoom lens is at the middle end in Example 2.

[0040] Fig.32 This is a spherical aberration diagram when the zoom lens is at the middle end in Example 2.

[0041] Fig.33 This is a distortion diagram when the zoom lens is at the middle end in Example 2.

[0042] Fig.34 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the middle end in Example 2.

[0043] Fig.35 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 2.

[0044] Fig.36 4 is a spherical aberration diagram of the zoom lens in Example 2 when it is at the telephoto end.

[0045] Fig.37This is a distortion diagram when the zoom lens is at the telephoto end in Example 2.

[0046] Fig.38 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the telephoto end in Example 2.

[0047] Fig.39 This is a schematic diagram of the zoom lens provided in Example 3 of the present application at the wide-angle end, the middle section, and the telephoto end.

[0048] Fig.40 Schematic diagram of light propagation when the zoom lens provided in Example 3 of the present application is at the wide-angle end, middle section, and telephoto end.

[0049] Fig.41 This is an astigmatism diagram when the zoom lens is at the wide-angle end in Example 3.

[0050] Fig.42 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 3.

[0051] Fig.43 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 3.

[0052] Fig.44 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the wide-angle end in Example 3.

[0053] Fig.45 This is an astigmatism diagram when the zoom lens is at the middle end in Example 3.

[0054] Fig.46 This is a spherical aberration diagram when the zoom lens is at the middle end in Example 3.

[0055] Fig.47 This is a distortion diagram when the zoom lens is at the middle end in Example 3.

[0056] Fig.48 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the middle end in Example 3.

[0057] Fig.49 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 3.

[0058] Fig.50 4 is a spherical aberration diagram of the zoom lens in Example 3 when it is at the telephoto end.

[0059] Fig.51 3 is a distortion diagram when the zoom lens is at the telephoto end in Example 3.

[0060] Fig.52 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the telephoto end in Example 3.

[0061] Fig.53 Schematic diagram of the zoom lens provided in Example 4 of the present application at the wide-angle end, the middle section, and the telephoto end.

[0062] Fig.54 Schematic diagram of light propagation when the zoom lens provided in Example 4 of the present application is at the wide-angle end, middle section, and telephoto end.

[0063] Fig.55 This is an astigmatism diagram when the zoom lens is at the wide-angle end in Example 4.

[0064] Fig.56 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 4.

[0065] Fig.57 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 4.

[0066] Fig.58 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the wide-angle end in Example 4.

[0067] Fig.59 This is an astigmatism diagram when the zoom lens is at the middle end in Example 4.

[0068] Fig.60 This is a spherical aberration diagram when the zoom lens is at the middle end in Example 4.

[0069] Fig.61 This is a distortion diagram when the zoom lens is at the middle end in Example 4.

[0070] Fig.62 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the middle end in Example 4.

[0071] Fig.63 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 4.

[0072] Fig.64 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 4.

[0073] Fig.65 This is a distortion diagram when the zoom lens is at the telephoto end in Example 4.

[0074] Fig.66 This is a diagram of vertical chromatic aberration based on 555nm when the zoom lens is at the telephoto end in Example 4. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0076] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0077] Please refer to Figure 1 and Figure 2 The present application provides an electronic device 100 , which includes a device body 1 and a camera module 2 , wherein the camera module 2 is installed on the device body 1 .

[0078] The device body 1 has a light-transmitting window K14, and the camera module 2 is arranged in the device body 1 corresponding to the light-transmitting window K14. External light can enter the camera module 2 through the light-transmitting window K14. The shape of the light-transmitting window K14 can be, but is not limited to, circular, elliptical, triangular, rectangular, etc. The light-transmitting window K14 can refer to a through hole on the device body 1, or it can be a physical part on the device body 1 that can transmit light.

[0079] The electronic device 100 may be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, a VR device, etc.), a television, an e-reader, etc. The following content of this application is only exemplified by taking the electronic device 100 as a mobile phone.

[0080] The device body 1 refers to the main part of the electronic device 100, which 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 (such as Figure 2 As shown), 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 side surfaces of the middle frame 12 are exposed outside the back cover 13 and the display screen 11.

[0081] It should be noted that, according to actual needs, the camera module 2 can be set on any side of the electronic device 100, and this application does not limit this. Taking a mobile phone as an example, the camera module 2 can be set on the front, back, and side of the mobile phone. Among them, the so-called front refers to the side of the mobile phone with a display screen 11; the so-called back refers to the side of the mobile phone with a back cover 13; the so-called side refers to the circumferential side of the middle frame 12 of the mobile phone. It can be understood that the types of electronic devices 100 are different, and the definitions of the front, back, side, etc. may be different. For other types of electronic devices 100, they are not described in detail here.

[0082] The camera module 2 may be a periscope camera, and the thickness of the periscope camera is consistent with the thickness of the electronic device 100, which is conducive to the design of a thinner electronic device 100. The length direction of the periscope camera may be consistent with the length of the electronic device 100, or may be consistent with the width of the electronic device 100, or may be arranged in an inclined manner in the electronic device 100.

[0083] Please refer to Figure 3 The present application provides a camera module 2, which includes a photosensitive element 23 and a zoom lens 21, and the photosensitive element 23 is used to receive light from the zoom lens 21.

[0084] Specifically, the zoom lens 21 is used to collect the light of the photographed scene and focus the light on the photosensitive element 23, and the photosensitive element 23 then converts the light signal into an electrical signal. Among them, the zoom lens 21 includes a plurality of lenses, and the number of lenses can be but is not limited to 6, 7, 8, etc. The material of the lens can be but is not limited to transparent glass or transparent plastic. The photosensitive element 23 can also be called a photosensitive chip or an image sensor or a sensor. The photosensitive element 23 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor device (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.

[0085] The camera module 2 also includes a filter 22, which is arranged on the light propagation path between the zoom lens 21 and the photosensitive element 23, and is used to eliminate unnecessary light to improve effective resolution and color reproduction. The filter 22 can be, but is not limited to, an infrared filter 22.

[0086] It should be noted that the imaging surface S231 and the filter 22 involved in the following embodiments of the zoom lens 21 are used to assist in describing the zoom lens 21 , and do not mean that the zoom lens 21 includes the photosensitive element 23 having the imaging surface S231 and the filter 22 .

[0087] The zoom lens 21 in the camera module 2 is described in detail below with reference to the accompanying drawings.

[0088] Please refer to Figure 4 The present application also provides a zoom lens 21, which includes: a first lens group G1, a second lens group G2, and a third lens group G3 arranged in sequence from the object side to the image side along the optical axis X.

[0089] The first lens group G1 has negative optical power. The second lens group G2 has positive optical power, and the second lens group G2 includes at least one lens with negative optical power. The third lens group G3 has negative optical power, and the third lens group G3 includes at least one lens with negative optical power.

[0090] The focal power characterizes the ability of an optical system (lens or lens group) to deflect light. Generally speaking, the focal power is also the reciprocal of the focal length on the image side. A positive focal power of an optical system indicates that it has a converging effect on light. A negative focal power of an optical system indicates that it has a diverging effect on light.

[0091] Each lens in the zoom lens 21 can be made of glass or plastic. Optionally, at least one lens in the zoom lens 21 is made of plastic. Compared with glass, plastic is lighter and more suitable for electronic devices 100 that require thinness.

[0092] The first lens group G1 includes at least 2 lenses, the second lens group G2 includes at least 3 lenses, and the third lens group G3 includes at least 2 lenses.

[0093] Please refer to Figure 4 Optionally, the first lens group G1 includes a first lens L1 and a second lens L2, the second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5, and the third lens group G3 includes a sixth lens L6 and a seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged in sequence from the object side to the image side along the optical axis X.

[0094] Please refer to Figure 4 and Figure 5The first lens group G1 is a fixed lens group, and the second lens group G2 and the third lens group G3 are movable lens groups. The zoom lens 21 has a wide-angle end (such as Figure 4 as shown) and the telephoto end (as shown Figure 5 As shown in FIG. 1 , the second lens group G2 and the third lens group G3 can move along the optical axis X so that the zoom lens 21 can switch between the wide-angle end and the telephoto end to achieve continuous zooming, so the second lens group G2 and the third lens group G3 can also be referred to as zoom lens groups. During the zooming process of the zoom lens 21 from the wide-angle end to the telephoto end, the second lens group G2 moves toward the object side along the optical axis X, and the third lens group G3 moves toward the object side along the optical axis X. Among them, the wide-angle end and the telephoto end are two different shooting states of the zoom lens 21. The wide-angle end can also be referred to as the short-focus state, and the telephoto end can also be referred to as the long-focus state. The two states of the zoom lens 21 are achieved by changing the positions of the second lens group G2 and the third lens group G3, that is, the positions of the second lens group G2 and the third lens group G3 when the zoom lens 21 is at the wide-angle end are different from the positions of the second lens group G2 and the third lens group G3 when the zoom lens 21 is at the telephoto end. The telephoto end refers to the state when the focal length of the zoom lens 21 is the largest, 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.

[0095] Please refer to Figure 6 The zoom lens 21 may also have an intermediate end, which is a shooting state between the wide-angle end and the telephoto end, and may also be referred to as an intermediate state. When the zoom lens 21 is at the intermediate end, the positions of the second lens group G2 and the third lens group G3 are different from the positions of the second lens group G2 and the third lens group G3 at the wide-angle end or the telephoto end.

[0096] In summary, in the zoom lens 21 provided in the embodiment of the present application, since both the first lens group G1 and the second lens group G2 can be moved along the optical axis X direction, the zoom switching of the zoom lens 21 between the telephoto end and the wide-angle end can be achieved by moving the first lens group G1 and the second lens group G2. Compared with the related art, the zoom lens 21 provided in this embodiment is equivalent to integrating multiple lenses with different focal lengths. During the switching process between the telephoto end and the wide-angle end, the zoom lens 21 is always a continuous optical zoom, which can ensure that the zoom lens 21 always has high-quality imaging without quality degradation. In addition, integrating the lenses can reduce the overall volume of the camera module 2, reduce costs, and can be matched with a large-bottom photosensitive element 23, thereby improving the imaging quality (such as achieving high-pixel shooting and reducing the signal-to-noise ratio).

[0097] Please refer to Figures 4 to 6, the zoom lens further includes a first reflector 212 and a second reflector 213. The first lens group L1 includes a first lens L1 and a second lens L2. The first lens L1 is disposed on the object side of the first reflector 212, and the second lens L2 is disposed on the image side of the first reflector 212. The first reflector 212 is used to reflect the light from the first lens L1 to the second lens L2. The second reflector 213 is disposed on the image side of the third lens group G3, and the second reflector 213 is used to reflect the light from the third lens group G3 to the photosensitive element 23.

[0098] Specifically, the first reflector 212 is used to change the propagation path of the light so that the light path is bent, so that the length direction of the camera module 2 can be consistent with the length direction or the width direction of the electronic device 100, which will not affect the thickness design of the electronic device 100. In other words, it is conducive to making the electronic device 100 thinner. This type of camera can also be called a periscope camera. Among them, the first reflector 212 can be a plane mirror or a prism. This application uses a prism as an example. The material of the first reflector 212 can be a light-transmitting material such as glass and plastic. Among them, the use of plastic material can reduce the weight of the zoom lens 21.

[0099] Please refer to Figures 4 to 6 , the first lens L1 is arranged on the object side of the first reflector 212, and the second lens L2 is arranged on the image side of the first reflector 212. That is to say, the first reflector 212 is located between the first lens L1 and the second lens L2. This arrangement can reduce the thickness of the lenses located after the first reflector 212, that is, the thickness of the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7. Therefore, the first reflector 212 is arranged between the first lens L1 and the second lens L2, which is conducive to the miniaturization of the zoom lens 21.

[0100] Please refer to Figures 4 to 6 , the second reflector 213 is arranged on the side of the third lens group G3 away from the second lens group G2. The second reflector 213 is used to reflect the light from the third lens group G3 to the photosensitive element 23. The second reflector 213 is also used to deflect the light path. The provision of the second reflector 213 can reduce the length of the camera module 2. The second reflector 213 can be a plane mirror or a prism. The present application uses a prism as an example. The material of the second reflector 213 can be a light-transmitting material such as glass and plastic. Among them, the use of plastic material can reduce the weight of the zoom lens 21.

[0101] In summary, in the zoom lens 21 provided in the embodiment of the present application, since both the first lens group L1 and the second lens group L2 can be moved along the optical axis X direction, the zoom switching of the zoom lens 21 between the telephoto end and the wide-angle end can be achieved by moving the first lens group L1 and the second lens group L2. Compared with the related art, the zoom lens 21 provided in this embodiment is equivalent to integrating multiple lenses with different focal lengths. During the switching process between the telephoto end and the wide-angle end, the zoom lens 21 is always a continuous optical zoom, which can ensure that the zoom lens 21 always has high-quality imaging without quality degradation. In addition, integrating the lenses can reduce the overall volume of the camera module 2, reduce costs, and can be matched with a large-bottom photosensitive element 23, thereby improving imaging quality (such as achieving high-pixel shooting and reducing the signal-to-noise ratio). In addition, the zoom lens 21 provided in the embodiment of the present application is also provided with a first reflector 212 and a second reflector 213. The first reflector 212 is used to change the propagation path of the light so as to bend the light path, so that the length direction of the camera module 2 can be consistent with the length direction or the width direction of the electronic device 100, which will not affect the thickness design of the electronic device 100. In other words, it is conducive to making the electronic device 100 thinner. Moreover, by setting the first reflector 212 between the first lens L1 and the second lens L2, the thickness of the lens located after the first reflector 212 can be reduced, which is conducive to the miniaturization of the zoom lens 21. Secondly, the second reflector 213 can also deflect the light path. After the second reflector 213 is set, the overall length of the camera module 2 can be reduced.

[0102] It can be understood that, since the zoom lens 21 provided in the present application is provided with the first reflector 212 and the second reflector 213, the optical axis X will be bent twice. According to the bending positions, the optical axis X is divided into a first optical axis X1, a second optical axis X2, and a third optical axis X3. The first optical axis X1 and the third optical axis X3 are both at 90° to the second optical axis X2 (e.g. Figures 4 to 6 shown).

[0103] Please refer to Figure 6The first reflector 212 has a first light incident surface M21, a first light emitting surface M23, and a first reflecting surface M22. During the shooting process, light enters the first reflector 212 from the first light incident surface M21, is then reflected by the first reflecting surface M22, and finally exits from the first light emitting surface M23. The second reflector 213 has a second light incident surface M31, a second light emitting surface M33, and a second reflecting surface M32. During the shooting process, light enters the second reflector 213 from the second light incident surface M31, is then reflected by the second reflecting surface M32, and finally exits from the second light emitting surface M33. The zoom lens 21 has a light incident side C1 and a backlight side C2 that are opposite to each other, wherein the light incident side C1 is the side of the zoom lens 21 that collects external light. In one embodiment, the first light incident surface M21 is located on the light incident side C1, and the second light emitting surface M33 is located on the backlight side C2 (such as Figure 6 In another embodiment, a light incident surface M21 and a second light emitting surface M33 are both located at the light incident side C1 (as shown in FIG. Figure 7 shown).

[0104] Please combine Figure 3 Reference Figure 8 In the direction of the first reflector 212 toward the first lens L1, the first lens L1 protrudes from the outer edges of the second lens L2, the second lens group G2, and the third lens group G3, so that the first lens L1, the second lens L2, the second lens group G2, and the third lens group G3 together constitute a first space Y1.

[0105] Please combine Figure 3 Reference Figure 8 In the direction of the second reflector 213 toward the photosensitive element 23, the photosensitive element 23 protrudes from the outer edges of the second lens L2, the second lens group G2, and the third lens group G3, so that the second lens L2, the second lens group G2, the third lens group G3, and the photosensitive element 23 together constitute a second space Y2.

[0106] It can be understood that both the first space Y1 and the second space Y2 can be used to set up electronic devices in the electronic device 100. For example, the first space Y1 or the second space Y2 can be used as a reserved space for the circuit substrate and battery of the mobile phone, which is conducive to reducing the thickness of the electronic device 100 and meeting the requirements of lightweight design.

[0107] Please refer to Fig. 9, the zoom lens 21 satisfies the following relationship: NP2>1.9, where NP2 is the refractive index of the material of the second reflector 213. NP2 may be, but is not limited to, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, etc. In this embodiment, the refractive index of the second reflector 213 is greater than 1.9, so the preset total length A_TTL of the zoom lens 21 can be shorter.

[0108] Please refer to Fig. 9 , the zoom lens 21 satisfies the following relationship: L_TTL / fz3<1.0, wherein L_TTL is the distance between the first reflector 212 and the second reflector 213 (i.e., the distance from the first light emitting surface M23 to the second light incident surface M31), and fz3 is the focal length of the telephoto end. Wherein, L_TTL / fz3 (the ratio of L_TTL to fz3) can be, but is not limited to, 0.99, 0.98, 0.95, 0.94, 0.93, 0.91, 0.90, 0.892, 0.89, 0.88, 0.87, 0.867, 0.85, 0.83, 0.82, 0.81, 0.809, 0.80, etc. In this embodiment, since the zoom lens 21 satisfies the above relationship, the overall length of the zoom lens 21 is short, so that it can be miniaturized. The miniaturized zoom lens 21 is more suitable for electronic devices 100 that require thinness and lightness, such as mobile phones.

[0109] Please refer to Fig. 9 , the first lens group G1 includes a first lens L1 and a second lens L2, and the zoom lens 21 satisfies the following relationship: NL1>1.9, wherein NL1 is the refractive index of the material of the first lens L1. NL1 may be, but is not limited to, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, etc. In this embodiment, the refractive index of the first lens L1 is greater than 1.9, so the middle height T_TTL and the middle length L_TTL of the zoom lens 21 can be reduced, and the f-number can be made smaller (i.e., a large aperture is obtained). The middle height T_TTL is the maximum height of the multiple lenses between the first reflector 212 and the second reflector 213. The middle length L_TTL is the distance between the first reflector 212 and the second reflector 213.

[0110] Please refer to Fig.10 It should be noted that in Fig.10In the figure, the double-dashed line represents the light ray. The first lens group G1 includes a first lens L1 and a second lens L2, and the second lens group G2 includes a third lens L3. The zoom lens 21 satisfies the following relationship: H1 > H3, where H1 is the beam width of the on-axis light ray incident on the first lens L1 when the zoom lens 21 is at the wide-angle end, and H3 is the beam width of the on-axis light ray incident on the third lens L3 when the zoom lens 21 is at the wide-angle end. It can be understood that since the light beam converges to the imaging surface S231, and in this embodiment, H1 is set to be greater than H3, the maximum height of the multiple lenses between the first reflector 212 and the second reflector 213 can be reduced.

[0111] It should be noted that in Fig.10 the first reflector 212 and the second reflector 213 are both exemplified by plane lenses, that is, the first reflector 212 and the second reflector 213 of this structure do not have the function of reflecting light rays. This is only for the convenience of illustration and understanding, and should not be construed as a limitation to the present application.

[0112] Please refer to Figure 6 , the first lens group G1 includes a first lens L1, and the zoom lens 21 satisfies the following relationship: -2.0 < fL1 / fg1 < 0, where fL1 is the focal length of the first lens L1, and fg1 is the focal length of the first lens group G1. Among them, fL1 / fg1 (the ratio of fL1 to fg1) can be but not limited to -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1.0, -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, etc. In this embodiment, the ratio of the focal length fL1 of the first lens L1 to the focal length fg1 of the first lens group G1 is set to be greater than -2.0 and less than 0, so as to reduce the overall aberration of the zoom lens 21. If it exceeds the above range, the aberration will increase.

[0113] Please refer to Figure 6 , the second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5, and the zoom lens 21 satisfies the following relationship: 0.4 < fL3 / fL5 < 1.2, where fL3 is the focal length of the third lens L3, and fL5 is the focal length of the fifth lens L5. Among them, fL3 / fL5 (the ratio of fL3 to fL5) can be but not limited to 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, etc. In this embodiment, the ratio of the focal length fL3 of the third lens L3 to the focal length fL5 of the fifth lens L5 is set to be greater than 0.4 and less than 1.2, so as to reduce the overall aberration of the zoom lens 21. If it exceeds the above range, the aberration will increase.

[0114] Please refer to Figure 6 , the second lens group G2 includes a third lens L3, and the zoom lens 21 satisfies the following relational expression: Vd3 > 60, where Vd3 is the Abbe number of the material of the third lens L3. Among them, Vd3 can be but not limited to 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, etc. In this embodiment, setting the Abbe number of the material of the third lens L3 to be greater than 60 can reduce chromatic aberration.

[0115] Please refer to Figure 6 , the zoom lens 21 satisfies the following relational expression: -1.0 < fg2 / fg3 < -0.5, where fg2 is the focal length of the second lens group G2 and fg3 is the focal length of the third lens group G3. Among them, fg2 / fg3 (the ratio of fg2 to fg3) can be but not limited to -0.98, -0.95, -0.92, -0.9, -0.87, -0.85, -0.83, -0.8, -0.75, -0.71, -0.7, -0.68, -0.65, -0.6. In this embodiment, setting the ratio of the focal length fg2 of the second lens group G2 to the focal length fg3 of the third lens group G3 to be greater than -1.0 and less than -0.5 can enable the zoom lens group to have a macro shooting function, and the macro shooting distance at the telephoto end within this condition range can be achieved to be less than 5 cm.

[0116] Please refer to Figure 6 , the zoom lens 21 satisfies the following relational expression: fz1 / EPDz1 < 2.8, where fz1 is the focal length at the wide-angle end and EPDz1 is the entrance pupil diameter at the wide-angle end, which can also be called the incident pupil diameter. Among them, fz1 / EPDz1 (the ratio of fz1 to EPDz1) can be but not limited to 2.7, 2.6, 2.59, 2.58, 2.57, 2.56, 2.55, 2.53, 2.52, 2.51, 2.5, 2.46, 2.42, 2.39, 2.38, 2.37, 2.36, 2.35, 2.33, 2.32, 2.31, 2.3, 2.2, 2.1, 2, etc. In this embodiment, fz1 / EPDz1 represents the f-number (or aperture number) at the wide-angle end. By setting the ratio of the focal length fz1 at the wide-angle end to the entrance pupil diameter EPDz1 at the wide-angle end to be less than 2.7, the wide-angle end has a large aperture, thereby improving the brightness and defocusing effect of the lens. Among them, when the brightness of the lens is improved, the amount of light entering the lens is more, which also means that clear imaging can be achieved even at night.

[0117] Please refer to Fig.10 , the second lens group G2 includes a third lens L3, and the zoom lens 21 satisfies the following relationship: (L1-P) / H3<0.4, wherein L1-P is the air interval between the first reflector 212 and the second lens L2, and H3 is the beam width of the axial light incident on the third lens L3 when the zoom lens 21 is at the wide-angle end. Wherein, (L1-P) / H3 (the ratio of (L1-P) to H3) can be, but is not limited to, 0.39, 0.38, 0.37, 0.36, 0.35, 0.34, 0.33, 0.32, 0.31, 0.30, 0.29, 0.28, 0.27, 0.26, 0.25, 0.24, 0.23, 0.22, 0.21, 0.1, etc. In this embodiment, the ratio of (L1-P) to H3 is set to be less than 0.4, so that H3 can be limited to a smaller range, thereby reducing the intermediate height T_TTL.

[0118] Please refer to Figure 6 , the zoom lens 21 satisfies the following relationship: P31R1<0, P31R2<0, wherein P31R1 is the object side curvature radius of the lens closest to the second lens group G2 in the third lens group G3, that is, the object side curvature radius of the first lens (sixth lens L6) in the third lens group G3G3, and P31R2 is the image side curvature radius of the lens closest to the second lens group G2 in the third lens group G3, that is, the image side curvature radius of the first lens (sixth lens L6) in the third lens group G3. In this embodiment, if the zoom lens 21 satisfies the relationship: P31R1<0, P31R2<0, then it can be ensured that the difference in the chief ray incident angle (Chief Ray Angle, CRA) at the wide-angle end and the telephoto end is small. CRA is a parameter of the sensor, and the light needs to be incident on the sensor at the required angle. For the zoom lens 21, the CRA at the wide-angle end and the telephoto end needs to be as consistent as possible. Therefore, the setting of the above relationship can ensure that the zoom lens 21 has good imaging quality.

[0119] Please refer to Figure 6, the zoom lens 21 also includes an aperture 211, and the aperture 211 is located on the object side of the second lens group G2 or inside the second lens group G2. That is, the aperture 211 can be set on the outside of the second lens group G2, or between two adjacent lenses in the second lens group G2. During the zooming process of the zoom lens 21, the aperture 211 moves together with the second lens group G2. That is, the aperture 211 and the second lens group G2 are relatively fixed, and the so-called relative fixation means that the aperture 211 and the second lens group G2 move synchronously together. The aperture 211 can be fixed on the second lens group G2, or on other components, which is not limited here. Since the arrangement between the lenses in the second lens group G2 is relatively sparse, and the arrangement between the lenses in the first lens group G1 is relatively close, therefore, setting the aperture 211 together with the second lens group G2 can reasonably utilize the space, and the radial size of each lens in the second lens group G2 is small, so the aperture 211 is easier to be set together with the second lens group G2.

[0120] The zoom lens 21 provided by the present application is further described below through four groups of specific embodiments. In the following embodiments, the surface type of each lens is aspherical, and the calculation formula of each aspherical surface is:

[0121]

[0122] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (that is, the paraxial curvature c is the reciprocal of the curvature radius R in the following table); k is the cone coefficient (see the table); Ai is the i-th order aspheric coefficient (see the table).

[0123] It should be noted that in the corresponding drawings of the following embodiments 1 to 4, the first reflector 212 and the second reflector 213 are exemplarily illustrated as plane lenses, that is, the first reflector 212 and the second reflector 213 of the structure do not have the function of reflecting light. This is only for the convenience of illustration and understanding and should not be understood as a limitation on the present application.

[0124] Example 1

[0125] Please refer to Figure 11 to Figure 12 , Fig.11 (a) is a schematic diagram of the zoom lens at the wide-angle end; Fig.11 (b) is a schematic diagram of the zoom lens at the middle end; Fig.11 (c) in the figure is a schematic diagram of the zoom lens at the telephoto end. Fig.12 (a) is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Fig.12(b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Fig.12 (c) in the figure is a schematic diagram of light propagation when the zoom lens is at the telephoto end.

[0126] 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, which are arranged in sequence from the object side to the image side along the optical axis X. The first lens group G1 includes a first lens L1 and a second lens L2. The second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5. The third lens group G3 includes a sixth lens L6 and a seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged in sequence from the object side to the image side along the optical axis X. The zoom lens 21 also includes a diaphragm 211, which is arranged between the second lens L2 and the third lens L3. The zoom lens 21 also includes a first reflector 212 and a second reflector 213, wherein the first reflector 212 is arranged between the first lens L1 and the second lens L2, and the second reflector 213 is arranged on the image side of the third lens group G3.

[0127] In Example 1, the field of view (FOV) is 33.8° to 21.6°, the F number (Fno) is 2.4 to 3.6, and the sensor size is 1 / 1.56 inches.

[0128] Please refer to Tables 1 to 4 for specific data of the zoom lens provided in Example 1.

[0129] Table 1 shows the parameters of the lenses, apertures, filters, and photosensitive elements of the zoom lens in Example 1, including the radius of curvature R, the interval D, the refractive index Nd, the Abbe coefficient Vd, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens. The units of the radius of curvature R, the interval d, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens are all millimeters (mm). In Table 1, surface numbers 1-21 are from the object side to the image side, marking the surface of the object, each lens, aperture, filter, and the imaging surface of the photosensitive element in sequence. The object is recorded as OBJ, the aperture is recorded as STO, and the imaging surface is recorded as IMA.

[0130] It should be noted that the interval D represents that the interval distance between the current surface and the next surface along the optical axis is D. For example, the interval between surface 2 and surface 3 in Table 1 is 1.4.

[0131]

[0132]

[0133] Table 2 shows the focal length EFL and the variable interval D corresponding to when the zoom lens is at the wide-angle end, the middle end, and the telephoto end in Example 1.

[0134]

[0135] Table 3 shows the k value and the i-th order aspheric coefficient Ai of the aspheric mirror surface of each lens in Example 1. Table 3 includes Table 3a, Table 3b, Table 3c, and Table 3d.

[0136]

[0137]

[0138]

[0139]

[0140]

[0141] Table 4 shows the overall parameter data of the zoom lens in Example 1.

[0142]

[0143] In this embodiment, the zoom lens 21 group is switched between the wide-angle end and the telephoto end by changing the interval DZ1 between the first lens group G1 and the aperture along the optical axis X (i.e., the interval distance between the image side surface of the second lens L2 and the object side surface of the aperture along the optical axis X), the interval DZ2 between the second lens group G2 and the third lens group G3 along the optical axis X (i.e., the interval distance between the image side surface of the fifth lens L5 and the object side surface of the sixth lens L6 along the optical axis X), and the interval DZ3 between the third lens group G3 and the second reflector 213 along the optical axis X (i.e., the interval distance between the image side surface of the seventh lens L7 and the object side surface of the second reflector 213 along the optical axis X).

[0144] Please refer to Figures 13 to 16 , Figures 13 to 16 A relevant graph at the wide-angle end of the zoom lens is shown.

[0145] Fig.13 This is an astigmatism diagram when the zoom lens is at the wide angle end in Example 1. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0146] Fig.14 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 1. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0147] Fig.15This is a distortion diagram when the zoom lens is at the wide-angle end in Example 1. The corresponding light wavelength in the diagram is 555nm.

[0148] Fig.16 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 1. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0149] Please refer to Figures 17 to 20 , Figures 17 to 20 A relevant graph for the middle end of a zoom lens is shown.

[0150] Fig.17 This is an astigmatism diagram when the zoom lens is at the middle end in Example 1. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, corresponding to a light wavelength of 555nm.

[0151] Fig.18 This is a spherical aberration diagram when the zoom lens is at the middle end in Example 1. In the diagram, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0152] Fig.19 This is a distortion diagram when the zoom lens is at the middle end in Example 1. The corresponding light wavelength in the diagram is 555nm.

[0153] Fig. 20 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the middle end in Example 1. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0154] Please refer to Figure 21 to Figure 24 , Figure 21 to Figure 24 A correlation graph at the telephoto end of a zoom lens is shown.

[0155] Fig.21 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 1. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0156] Fig. 22 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 1. In the diagram, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0157] Fig.23 This is a distortion diagram when the zoom lens is at the telephoto end in Example 1. The corresponding light wavelength in the diagram is 555nm.

[0158] Fig.24This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 1. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0159] according to Figures 13 to 24 It can be seen that the zoom lens provided in Example 1 has good imaging quality at the wide-angle end, the middle end, and the telephoto end.

[0160] Example 2

[0161] Please refer to Figure 25 to Figure 26 , Fig.25 (a) is a schematic diagram of the zoom lens at the wide-angle end; Fig.25 (b) is a schematic diagram of the zoom lens at the middle end; Fig.25 (c) in the figure is a schematic diagram of the zoom lens at the telephoto end. Fig.26 (a) is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Fig.26 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Fig.26 (c) in the figure is a schematic diagram of light propagation when the zoom lens is at the telephoto end.

[0162] 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, which are arranged in sequence from the object side to the image side along the optical axis X. The first lens group G1 includes a first lens L1 and a second lens L2. The second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5. The third lens group G3 includes a sixth lens L6 and a seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged in sequence from the object side to the image side along the optical axis X. The zoom lens 21 also includes a diaphragm 211, which is arranged between the second lens L2 and the third lens L3. The zoom lens 21 also includes a first reflector 212 and a second reflector 213, wherein the first reflector 212 is arranged between the first lens L1 and the second lens L2, and the second reflector 213 is arranged on the image side of the third lens group G3.

[0163] In Example 2, the field of view (FOV) is 34.0° to 18.6°, the F number (Fno) is 2.6 to 4.1, and the sensor size is 1 / 2 inch.

[0164] Please refer to Tables 5 to 8 for specific data of the zoom lens provided in Example 2.

[0165] Table 5 shows the parameters of the lenses, apertures, filters, and photosensitive elements of the zoom lens in Example 2, including the radius of curvature R, the interval D, the refractive index Nd, the Abbe coefficient Vd, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens. The units of the radius of curvature R, the interval d, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens are all millimeters (mm). In Table 5, surface numbers 1-21 are from the object side to the image side, marking the surface of the object, each lens, aperture, filter, and the imaging surface of the photosensitive element in sequence. The object is recorded as OBJ, the aperture is recorded as STO, and the imaging surface is recorded as IMA.

[0166] It should be noted that the interval D represents that the interval distance between the current surface and the next surface along the optical axis is D. For example, the interval between surface 2 and surface 3 in Table 5 is 1.4.

[0167] Table 6 shows the focal length EFL and the variable interval D corresponding to when the zoom lens in Example 2 is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0168]

[0169] Table 7 shows the k value and the i-th order aspheric coefficient Ai of the aspheric mirror surface of each lens in Example 2. Table 7 includes Table 7a, Table 7b, Table 7c, and Table 7d.

[0170]

[0171]

[0172]

[0173]

[0174] Table 8 shows the overall parameter data of the zoom lens in Example 2.

[0175]

[0176]

[0177] In this embodiment, the zoom lens 21 group is switched between the wide-angle end and the telephoto end by changing the interval DZ1 between the first lens group G1 and the aperture along the optical axis X (i.e., the interval distance between the image side surface of the second lens L2 and the object side surface of the aperture along the optical axis X), the interval DZ2 between the second lens group G2 and the third lens group G3 along the optical axis X (i.e., the interval distance between the image side surface of the fifth lens L5 and the object side surface of the sixth lens L6 along the optical axis X), and the interval DZ3 between the third lens group G3 and the second reflector 213 along the optical axis X (i.e., the interval distance between the image side surface of the seventh lens L7 and the object side surface of the second reflector 213 along the optical axis X).

[0178] Please refer to Figures 27 to 30 , Figures 27 to 30 A relevant graph at the wide-angle end of the zoom lens is shown.

[0179] Fig. 27 This is an astigmatism diagram when the zoom lens is at the wide angle end in Example 2. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0180] Fig.28 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 2. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0181] Fig.29 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 2. The corresponding light wavelength in the diagram is 555nm.

[0182] Fig.30 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 2. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0183] Please refer to Figure 31 to Figure 34 , Figure 31 to Figure 34 A correlation graph at the telephoto end of a zoom lens is shown.

[0184] Fig.31 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 2. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, corresponding to a light wavelength of 555nm.

[0185] Fig.32 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 2. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0186] Fig.33This is a distortion diagram when the zoom lens is at the telephoto end in Example 2. The corresponding light wavelength in the diagram is 555nm.

[0187] Fig.34 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 2. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0188] Please refer to Figures 35 to 38 , Figures 35 to 38 A correlation graph at the telephoto end of a zoom lens is shown.

[0189] Fig.35 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 2. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, corresponding to a light wavelength of 555nm.

[0190] Fig.36 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 2. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0191] Fig.37 This is a distortion diagram when the zoom lens is at the telephoto end in Example 2. The corresponding light wavelength in the diagram is 555nm.

[0192] Fig.38 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 2. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0193] according to Figures 27 to 38 It can be seen that the zoom lens provided in Example 2 has good imaging quality at the wide-angle end, the middle end, and the telephoto end.

[0194] Example 3

[0195] Please refer to Figure 39 to Figure 40 , Fig.39 (a) is a schematic diagram of the zoom lens at the wide-angle end; Fig.39 (b) is a schematic diagram of the zoom lens at the middle end; Fig.39 (c) in the figure is a schematic diagram of the zoom lens at the telephoto end. Fig.40 (a) is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Fig.40 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Fig.40 (c) in the figure is a schematic diagram of light propagation when the zoom lens is at the telephoto end.

[0196] 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, which are arranged in sequence from the object side to the image side along the optical axis X. The first lens group G1 includes a first lens L1 and a second lens L2. The second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5. The third lens group G3 includes a sixth lens L6 and a seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged in sequence from the object side to the image side along the optical axis X. The zoom lens 21 also includes a diaphragm 211, which is arranged between the second lens L2 and the third lens L3. The zoom lens 21 also includes a first reflector 212 and a second reflector 213, wherein the first reflector 212 is arranged between the first lens L1 and the second lens L2, and the second reflector 213 is arranged on the image side of the third lens group G3.

[0197] In Example 3, the field of view (FOV) is 34.3° to 21.7°, the F number (Fno) is 2.4 to 3.5, and the sensor size is 1 / 1.56 inches.

[0198] For specific data of the zoom lens provided in Example 3, please refer to Tables 9 to 12.

[0199] Table 9 shows the parameters of the lenses, apertures, filters, and photosensitive elements of the zoom lens in Example 3, including the radius of curvature R, the interval D, the refractive index Nd, the Abbe coefficient Vd, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens. The units of the radius of curvature R, the interval d, the focal length of each lens, the focal length of the lens group, and the focal length of the zoom lens are all millimeters (mm). In Table 9, surface numbers 1-21 are from the object side to the image side, marking the surface of the object, each lens, aperture, filter, and the imaging surface of the photosensitive element in sequence. The object is recorded as OBJ, the aperture is recorded as STO, and the imaging surface is recorded as IMA.

[0200] It should be noted that the interval D represents that the interval distance between the current surface and the next surface along the optical axis is D. For example, the interval between surface 2 and surface 3 in Table 9 is 1.4.

[0201]

[0202]

[0203] Table 10 shows the focal length EFL and the variable interval D corresponding to when the zoom lens in Example 3 is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0204]

[0205] Table 11 shows the k value and the i-th order aspheric coefficient Ai of the aspheric mirror surface of each lens in Example 3. Table 11 includes Table 11a, Table 11b, Table 11c, and Table 11d.

[0206]

[0207]

[0208]

[0209]

[0210]

[0211] Table 12 shows the overall parameter data of the zoom lens in Example 3.

[0212]

[0213]

[0214] In this embodiment, the zoom lens 21 group is switched between the wide-angle end and the telephoto end by changing the interval DZ1 between the first lens group G1 and the aperture along the optical axis X (i.e., the interval distance between the image side surface of the second lens L2 and the object side surface of the aperture along the optical axis X), the interval DZ2 between the second lens group G2 and the third lens group G3 along the optical axis X (i.e., the interval distance between the image side surface of the fifth lens L5 and the object side surface of the sixth lens L6 along the optical axis X), and the interval DZ3 between the third lens group G3 and the second reflector 213 along the optical axis X (i.e., the interval distance between the image side surface of the seventh lens L7 and the object side surface of the second reflector 213 along the optical axis X).

[0215] Please refer to Figure 41 to Figure 44 , Figure 41 to Figure 44 A relevant graph at the wide-angle end of the zoom lens is shown.

[0216] Fig.41 This is an astigmatism diagram when the zoom lens is at the wide angle end in Example 3. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0217] Fig.42 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 3. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0218] Fig.43 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 3. The corresponding light wavelength in the diagram is 555nm.

[0219] Fig.44 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 3. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0220] Please refer to Figures 45 to 48 , Figures 45 to 48 A correlation graph at the telephoto end of a zoom lens is shown.

[0221] Fig.45 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 3. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, corresponding to a light wavelength of 555nm.

[0222] Fig.46 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 3. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0223] Fig.47 This is a distortion diagram when the zoom lens is at the telephoto end in Example 3. The corresponding light wavelength in the diagram is 555nm.

[0224] Fig.48 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 3. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0225] Please refer to Figures 49 to 52 , Figures 49 to 52 A correlation graph at the telephoto end of a zoom lens is shown.

[0226] Fig.49 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 3. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, corresponding to a light wavelength of 555nm.

[0227] Fig.50 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 3. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0228] Fig.51 This is a distortion diagram when the zoom lens is at the telephoto end in Example 3. The corresponding light wavelength in the diagram is 555nm.

[0229] Fig.52This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 3. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0230] according to Figures 41 to 52 It can be seen that the zoom lens provided in Example 3 has good imaging quality at the wide-angle end, the middle end, and the telephoto end.

[0231] Example 4

[0232] Please refer to Figure 53 to Figure 54 , Fig.53 (a) is a schematic diagram of the zoom lens at the wide-angle end; Fig.53 (b) is a schematic diagram of the zoom lens at the middle end; Fig.53 (c) in the figure is a schematic diagram of the zoom lens at the telephoto end. Fig.54 (a) is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Fig.54 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Fig.54 (c) in the figure is a schematic diagram of light propagation when the zoom lens is at the telephoto end.

[0233] 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, which are arranged in sequence from the object side to the image side along the optical axis X. The first lens group G1 includes a first lens L1 and a second lens L2. The second lens group G2 includes a third lens L3, a fourth lens L4, and a fifth lens L5. The third lens group G3 includes a sixth lens L6 and a seventh lens L7. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged in sequence from the object side to the image side along the optical axis X. The zoom lens 21 also includes a diaphragm 211, which is arranged between the second lens L2 and the third lens L3. The zoom lens 21 also includes a first reflector 212 and a second reflector 213, wherein the first reflector 212 is arranged between the first lens L1 and the second lens L2, and the second reflector 213 is arranged on the image side of the third lens group G3.

[0234] In Example 4, the field of view (FOV) is 34.3° to 21.7°, the F number (Fno) is 2.4 to 3.3, and the sensor size is 1 / 1.56 inches.

[0235] For specific data of the zoom lens provided in Example 4, please refer to Tables 13 to 16.

[0236] Table 13 shows the parameters of the zoom lens, aperture, filter, and photosensitive element in Example 4, including the radius of curvature R, interval D, refractive index Nd, Abbe coefficient Vd, focal length of each lens, focal length of the lens group, and focal length of the zoom lens. The units of the radius of curvature R, interval d, focal length of each lens, focal length of the lens group, and focal length of the zoom lens are all millimeters (mm). In Table 13, surface numbers 1-21 are from the object side to the image side, marking the surface of the object, each lens, aperture, filter, and the imaging surface of the photosensitive element in sequence. The object is recorded as OBJ, the aperture is recorded as STO, and the imaging surface is recorded as IMA.

[0237] It should be noted that the interval D represents that the interval distance between the current surface and the next surface along the optical axis is D. For example, the interval between surface 2 and surface 3 in Table 13 is 1.319365921.

[0238]

[0239] Table 14 shows the focal length EFL and variable interval D corresponding to when the zoom lens in Example 4 is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0240]

[0241] Table 15 shows the k value and the i-th order aspheric coefficient Ai of the aspheric mirror surface of each lens in Example 4. Table 15 includes Table 15a, Table 15b, Table 15c, and Table 15d.

[0242]

[0243]

[0244]

[0245]

[0246]

[0247] Table 16 shows the overall parameter data of the zoom lens in Example 4.

[0248]

[0249]

[0250] In this embodiment, the zoom lens 21 group is switched between the wide-angle end and the telephoto end by changing the interval DZ1 between the first lens group G1 and the aperture along the optical axis X (i.e., the interval distance between the image side surface of the second lens L2 and the object side surface of the aperture along the optical axis X), the interval DZ2 between the second lens group G2 and the third lens group G3 along the optical axis X (i.e., the interval distance between the image side surface of the fifth lens L5 and the object side surface of the sixth lens L6 along the optical axis X), and the interval DZ3 between the third lens group G3 and the second reflector 213 along the optical axis X (i.e., the interval distance between the image side surface of the seventh lens L7 and the object side surface of the second reflector 213 along the optical axis X).

[0251] Please refer to Figure 55 to Figure 58 , Figure 55 to Figure 58 A relevant graph at the wide-angle end of the zoom lens is shown.

[0252] Fig.55 This is an astigmatism diagram when the zoom lens is at the wide angle end in Example 4. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0253] Fig.56 This is a spherical aberration diagram when the zoom lens is at the wide-angle end in Example 4. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0254] Fig.57 This is a distortion diagram when the zoom lens is at the wide-angle end in Example 4. The corresponding light wavelength in the diagram is 555nm.

[0255] Fig.58 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 4. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0256] Please refer to Figure 59 to Figure 62 , Figure 59 to Figure 62 A correlation graph at the telephoto end of a zoom lens is shown.

[0257] Fig.59 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 4. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0258] Fig.60 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 4. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0259] Fig.61This is a distortion diagram when the zoom lens is at the telephoto end in Example 4. The corresponding light wavelength in the diagram is 555nm.

[0260] Fig.62 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 4. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0261] Please refer to Figure 63 to Figure 66 , Figure 63 to Figure 66 A correlation graph at the telephoto end of a zoom lens is shown.

[0262] Fig.63 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 4. In the figure, the dotted line represents the meridian, and the solid line represents the sagittal, and the corresponding light wavelength is 555nm.

[0263] Fig.64 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 4. In the figure, the dotted line corresponds to a light wavelength of 650nm, the solid line corresponds to a light wavelength of 555nm, and the dashed line corresponds to a light wavelength of 470nm.

[0264] Fig.65 This is a distortion diagram when the zoom lens is at the telephoto end in Example 4. The corresponding light wavelength in the diagram is 555nm.

[0265] Fig.66 This is a vertical axis chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 4. The dotted line in the figure corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0266] according to Figures 55 to 66 It can be seen that the zoom lens provided in Example 4 has good imaging quality at the wide-angle end, the middle end, and the telephoto end.

[0267] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. A zoom lens, characterized in that: The zoom lens includes: a first lens group, a second lens group, and a third lens group arranged in sequence from the object side to the image side along the optical axis. The zoom lens has a wide-angle end and a telephoto end. The second lens group and the third lens group are movable along the optical axis so that the zoom lens zooms and switches between the wide-angle end and the telephoto end to achieve continuous zooming. The zoom lens further includes a first reflector and a second reflector. The first lens group includes a first lens and a second lens. The first lens is disposed on the object side of the first reflector, and the second lens is disposed on the image side of the first reflector. The first reflector is configured to reflect the light from the first lens to the second lens. The second reflector is disposed on the image side of the third lens group, and the second reflector is configured to reflect the light from the third lens group to the photosensitive element.

2. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: NL1 > 1.9, where NL1 is the refractive index of the material of the first lens.

3. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: NP2 > 1.9, where NP2 is the refractive index of the material of the second reflector.

4. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: L_TTL / fz3 < 1.0, where L_TTL is the distance between the first reflector and the second reflector, and fz3 is the focal length of the telephoto end.

5. The zoom lens according to claim 1, wherein: The first lens group has a negative optical power, the second lens group has a positive optical power, and the second lens group includes at least one lens with a negative optical power. The third lens group has a negative optical power, and the third lens group includes at least one lens with a negative optical power.

6. The zoom lens according to claim 1, wherein: The second lens group includes a third lens. The zoom lens satisfies the following relationship: H1 > H3, where H1 is the beam width of the on-axis light incident on the first lens when the zoom lens is at the wide-angle end, and H3 is the beam width of the on-axis light incident on the third lens when the zoom lens is at the wide-angle end.

7. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: -2.0 < fL1 / fg1 < 0, where fL1 is the focal length of the first lens, and fg1 is the focal length of the first lens group.

8. The zoom lens according to claim 1, wherein: The second lens group includes a third lens, a fourth lens, and a fifth lens. The zoom lens satisfies the following relationship: 0.4 < fL3 / fL5 < 1.2, where fL3 is the focal length of the third lens, and fL5 is the focal length of the fifth lens.

9. The zoom lens according to claim 1, wherein: The second lens group includes a third lens. The zoom lens satisfies the following relationship: Vd3 > 60, where Vd3 is the Abbe number of the material of the third lens.

10. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: -1.0 < fg2 / fg3 < -0.5, where fg2 is the focal length of the second lens group, and fg3 is the focal length of the third lens group.

11. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: fz1 / EPDz1 < 2.8, where fz1 is the focal length of the wide-angle end, and EPDz1 is the entrance pupil diameter of the wide-angle end.

12. The zoom lens according to claim 1, wherein: The second lens group includes a third lens, and the zoom lens satisfies the following relationship: (L1-P) / H3<0.4, wherein L1-P is the air gap between the first reflector and the second lens, and H3 is the beam width of the on-axis light incident on the third lens when the zoom lens is at the wide-angle end.

13. The zoom lens according to claim 1, wherein: The zoom lens satisfies the following relationship: P31R1<0, P31R2<0, wherein P31R1 is the object-side curvature radius of the lens in the third lens group that is closest to the second lens group, and P31R2 is the image-side curvature radius of the lens in the third lens group that is closest to the second lens group.

14. The zoom lens according to any one of claims 1 to 13, wherein: The zoom lens further includes an aperture stop, which is located on the object side of the second lens group or inside the second lens group. During the zooming process of the zoom lens, the aperture stop moves together with the second lens group.

15. The zoom lens according to any one of claims 1 to 13, wherein: During zooming of the zoom lens from the wide-angle end to the telephoto end, the second lens group moves along the optical axis toward the object side, and the third lens group moves along the optical axis toward the object side.

16. The zoom lens according to any one of claims 1 to 13, wherein: The first lens group includes a first lens and a second lens, the second lens group includes a third lens, a fourth lens, and a fifth lens, and the third lens group includes a sixth lens and a seventh lens.

17. A camera module, characterized in that: The camera module includes a photosensitive element and a zoom lens as described in any one of claims 1 to 16, and the photosensitive element is used to receive light from the zoom lens.

18. An electronic device, characterized in that: The electronic device comprises a device body and a camera module as claimed in claim 17, wherein the camera module is installed on the device body.

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