Zoom lens, camera module and electronic device

Abstract

The application provides a zoom lens, a camera module and an electronic device. The zoom lens comprises a first lens group, a second lens group and a third lens group arranged in sequence along an optical axis from an object side to an image side. 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 is switched between the wide-angle end and the telephoto end to realize continuous zooming. The zoom lens further comprises a first reflecting element and a second reflecting element. 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 element, and the second lens is arranged on the image side of the first reflecting element. The first reflecting element is used for reflecting light from the first lens to the second lens. The second reflecting element is arranged on the image side of the third lens group, and is used for reflecting light from the third lens group to a photosensitive element. The zoom lens provided by the application can ensure good imaging quality during zooming.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, specifically to a zoom lens, a camera module, and an electronic device. Background Technology

[0002] In recent years, with the rapid development of smartphones, consumers have increasingly higher demands for mobile phone photography performance. For example, wider zoom range, higher resolution, and higher image quality are required. These demands place higher requirements on mobile phone lenses, and single-focal-length lenses and digital zoom methods can no longer meet consumer needs. Currently, most high-magnification optical zoom lenses on the market are "skip-type" zooms, which achieve hybrid optical zoom by using two or three lenses with different focal lengths, combined with algorithm-based digital zoom. However, skip-type digital zoom relies on multiple cameras with different focal lengths to achieve continuous zoom through algorithm processing, and is not actually continuous zoom. Its disadvantage is that during the zoom process, the image sharpness of the disconnected parts outside the focal length range of the multiple cameras is reduced compared to continuous optical zoom, affecting image quality. Summary of the Invention

[0003] This application provides a zoom lens, camera module, and electronic device that can ensure good image quality during zooming.

[0004] In a first aspect, this application provides a zoom lens, comprising: a first lens group, a second lens group, and a third lens group arranged sequentially along an optical axis from the object side to the image side. 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 to allow the zoom lens to switch between the wide-angle end and the telephoto end for continuous zoom. The zoom lens further comprises 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 used to reflect light from the first lens to the second lens. The second reflector is disposed on the image side of the third lens group and is used to reflect light from the third lens group to a photosensitive element.

[0005] Secondly, this application also provides a camera module, which includes a photosensitive element and a zoom lens, wherein the photosensitive element is used to receive light from the zoom lens.

[0006] Thirdly, this application also provides an electronic device, which includes a device body and a camera module, wherein the camera module is mounted on the device body.

[0007] In the zoom lens provided in this embodiment, since both the first lens group and the second lens group can move along the optical axis, the zoom lens can switch between the telephoto and wide-angle ends by moving the first and second lens groups. Compared with related technologies, the zoom lens provided in this embodiment is equivalent to integrating multiple lenses with different focal lengths. During the switching process between the telephoto and wide-angle ends, the zoom lens always provides continuous optical zoom, thus ensuring that the zoom lens always produces high-quality images without any quality degradation. Furthermore, integrating the lenses can reduce the overall size of the camera module, lower costs, and allow for the use of larger image sensors, thereby improving image quality (e.g., achieving high-pixel shooting and reducing signal-to-noise ratio). In addition, the zoom lens provided in this embodiment also includes a first reflector and a second reflector. The first reflector is used to change the propagation path of light, causing the light path to bend, so that the length direction of the camera module can be consistent with the length or width direction of the electronic device. This avoids affecting the thickness design of the electronic device, in other words, it is beneficial to make the electronic device thinner. Furthermore, by placing the first reflector between the first and second lenses, the thickness of the lens located behind the first reflector can be reduced, which is beneficial for miniaturizing the zoom lens. Secondly, the second reflector can also deflect the light path, and its placement can reduce the overall length of the camera module. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementations of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

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

[0011] Figure 3 This is a schematic diagram of a camera module provided in an embodiment of this application.

[0012] Figure 4 This is a schematic diagram of a zoom lens at the wide-angle end, provided in an embodiment of this application.

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

[0014] Figure 6This is a schematic diagram showing the zoom lens at the middle position according to an embodiment of this application.

[0015] Figure 7 This is a schematic diagram of a zoom lens provided in another embodiment of this application.

[0016] Figure 8 This is a schematic diagram of a zoom lens provided in another embodiment of this application.

[0017] Figure 9 This is a schematic diagram of a zoom lens provided in another embodiment of this application.

[0018] Figure 10 This is a schematic diagram of a zoom lens provided in another embodiment of this application.

[0019] Figure 11 This is a schematic diagram of the zoom lens provided in Embodiment 1 of this application at the wide-angle end, the middle section, and the telephoto end.

[0020] Figure 12 This is a schematic diagram of light propagation when the zoom lens provided in Embodiment 1 of this application is at the wide-angle end, the middle section, and the telephoto end.

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

[0022] Figure 14 This is a spherical aberration diagram of the zoom lens at the wide-angle end in Example 1.

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

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

[0025] Figure 17 This is an image of astigmatism when the zoom lens is at the middle position in Example 1.

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

[0027] Figure 19 This is a distortion diagram of the zoom lens in Example 1 when it is at the middle position.

[0028] Figure 20 This is the 555nm reference chromatic aberration diagram for the zoom lens in Example 1 when it is at the middle position.

[0029] Figure 21 This is an image of astigmatism when the zoom lens is at the telephoto end in Example 1.

[0030] Figure 22 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 1.

[0031] Figure 23 This is a distortion diagram of the zoom lens at the telephoto end in Example 1.

[0032] Figure 24 This is the 555nm reference chromatic aberration diagram of the zoom lens at the telephoto end in Example 1.

[0033] Figure 25 This is a schematic diagram of the zoom lens provided in Embodiment 2 of this application at the wide-angle end, the middle section, and the telephoto end.

[0034] Figure 26 This is a schematic diagram of light propagation when the zoom lens is at the wide-angle end, the middle section, and the telephoto end, as provided in Embodiment 2 of this application.

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

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

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

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

[0039] Figure 31 This is an image of astigmatism when the zoom lens is at the middle position in Example 2.

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

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

[0042] Figure 34 This is the 555nm reference chromatic aberration diagram for the zoom lens in Example 2 when it is at the middle position.

[0043] Figure 35 This is an image of astigmatism when the zoom lens is at the telephoto end in Example 2.

[0044] Figure 36 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 2.

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

[0046] Figure 38 This is the 555nm reference chromatic aberration diagram of the zoom lens at the telephoto end in Example 2.

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

[0048] Figure 40 This is a schematic diagram of light propagation when the zoom lens is at the wide-angle end, the middle section, and the telephoto end, as provided in Embodiment 3 of this application.

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

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

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

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

[0053] Figure 45 This is an image of astigmatism when the zoom lens is at the middle position in Example 3.

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

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

[0056] Figure 48 This is the 555nm reference chromatic aberration diagram for the zoom lens in Example 3 when it is at the middle position.

[0057] Figure 49 This is an image of astigmatism when the zoom lens is at the telephoto end in Example 3.

[0058] Figure 50 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 3.

[0059] Figure 51 This is a distortion diagram of the zoom lens at the telephoto end in Example 3.

[0060] Figure 52 This is the 555nm reference chromatic aberration diagram of the zoom lens at the telephoto end in Example 3.

[0061] Figure 53 This is a schematic diagram of the zoom lens provided in Embodiment 4 of this application at the wide-angle end, the middle section, and the telephoto end.

[0062] Figure 54 This is a schematic diagram of light propagation when the zoom lens is at the wide-angle end, the middle section, and the telephoto end, as provided in Embodiment 4 of this application.

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

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

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

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

[0067] Figure 59 This is an image of astigmatism when the zoom lens is at the middle position in Example 4.

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

[0069] Figure 61 This is a distortion diagram of the zoom lens in Example 4 when it is at the middle position.

[0070] Figure 62 This is the 555nm reference chromatic aberration diagram for the zoom lens in Example 4 when it is at the middle position.

[0071] Figure 63 This is an image of astigmatism when the zoom lens is at the telephoto end in Example 4.

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

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

[0074] Figure 66 This is the 555nm reference chromatic aberration diagram of the zoom lens at the telephoto end in Example 4. Detailed Implementation

[0075] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0076] In this document, references to "embodiment" or "implementation" mean that a particular feature, structure, or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0077] Please refer to Figure 1 and Figure 2 This 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 disposed inside 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 light-transmitting solid part on the device body 1.

[0079] The electronic device 100 can be a mobile phone, tablet computer, laptop computer, wearable device (such as a smartwatch, VR device, etc.), television, e-reader, etc. The following description uses a mobile phone as an example only.

[0080] The device body 1 refers to the main body 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 supports these electronic components. The device body 1 may include a display screen 11, a mid-frame 12, and a back cover 13 (e.g., ...). Figure 2 As shown, the display screen 11 and the back cover 13 are both connected to the middle frame 12 and are located on opposite sides of the middle frame 12, and the side of the middle frame 12 is exposed outside the back cover 13 and the display screen 11.

[0081] It should be noted that, depending on actual needs, the camera module 2 can be located 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 located on the front, back, or side of the phone. Here, the front refers to the side of the phone with the display screen 11; the back refers to the side of the phone with the back cover 13; and the side refers to the circumferential side of the phone's frame 12. It is understood that the definitions of "front," "back," and "side" may differ depending on the type of electronic device 100; other types of electronic devices 100 will not be detailed here.

[0082] Camera module 2 can be a periscope camera, with the thickness of the periscope camera matching the thickness of the electronic device 100, which allows for a thinner design of the electronic device 100. The length of the periscope camera can match the length of the electronic device 100, the width of the electronic device 100, or it can be tilted within the electronic device 100.

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

[0084] Specifically, the zoom lens 21 is used to collect light from the subject and focus it onto the photosensitive element 23, which then converts the light signal into an electrical signal. The zoom lens 21 comprises multiple lenses, the number of which can be, but is not limited to, 6, 7, or 8 lenses. The lens material can be, but is not limited to, transparent glass or transparent plastic. The photosensitive element 23 can also be called a photosensitive chip, image sensor, or sensor. The photosensitive element 23 can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device. The photosensitive element 23 has an imaging surface S231, which is the target surface on the photosensitive element 23 that receives light.

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

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

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

[0088] Please refer to Figure 4 This 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 sequentially along the optical axis X from the object side to the image side.

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

[0090] The focal power refers to the ability of an optical system (lens or lens group) to deflect light rays. Generally, the focal power is the reciprocal of the image-side focal length. A positive focal power indicates that the optical system converges light rays, while a negative focal power indicates that the optical system diverges light rays.

[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 to glass, plastic is lighter and more suitable for electronic devices 100 that require a slim and lightweight design.

[0092] The first lens group G1 includes at least two lenses, the second lens group G2 includes at least three lenses, and the third lens group G3 includes at least two 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 sequentially along the optical axis X from the object side to the image side.

[0094] Please refer to Figure 4 and Figure 5The first lens group G1 is a fixed lens group, while the second lens group G2 and the third lens group G3 are movable lens groups. The zoom lens 21 has a wide-angle end (e.g., Figure 4 (as shown) and telescope (as shown) Figure 5 As shown, the second lens group G2 and the third lens group G3 can move along the optical axis X to allow the zoom lens 21 to switch between the wide-angle end and the telephoto end, thus achieving continuous zoom. Therefore, the second lens group G2 and the third lens group G3 can also be referred to as zoom lens groups. During the zoom process of the zoom lens 21 from the wide-angle end to the telephoto end, the second lens group G2 moves towards the object side along the optical axis X, and the third lens group G3 moves towards the object side along the optical axis X. The wide-angle end and the telephoto end represent two different shooting states of the zoom lens 21. The wide-angle end can also be called the short focal length state, and the telephoto end can also be called the long focal length state. These 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 at its maximum; 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 at its minimum; the wide-angle end can also be called the wide-angle state.

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

[0096] In summary, in the zoom lens 21 provided in this embodiment, since both the first lens group G1 and the second lens group G2 can move along the optical axis X, the zoom switching between the telephoto and wide-angle ends can be achieved by moving the first lens group G1 and the second lens group G2. Compared with related technologies, 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 and wide-angle ends, the zoom lens 21 always provides continuous optical zoom, thus ensuring that the zoom lens 21 always produces high-quality images without any quality degradation. Furthermore, integrating the lenses can reduce the overall size of the camera module 2, lower costs, and allow for the use of a large-sensor image sensor 23, thereby improving image quality (e.g., achieving high-pixel shooting and reducing the signal-to-noise ratio).

[0097] Please refer to Figures 4 to 6The 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 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 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 light, causing the light path to bend, so that the length direction of the camera module 2 can be consistent with the length direction or width direction of the electronic device 100. This avoids affecting the thickness design of the electronic device 100, in other words, it allows the electronic device 100 to be made thinner. This type of camera can also be called a periscope camera. 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 light-transmitting materials such as glass or plastic. Using plastic can reduce the weight of the zoom lens 21.

[0099] Please refer to Figures 4 to 6 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. That is, 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 can be reduced. Therefore, placing the first reflector 212 between the first lens L1 and the second lens L2 is beneficial for miniaturizing the zoom lens 21.

[0100] Please refer to Figures 4 to 6 The second reflector 213 is disposed on the side of the third lens group G3 opposite to the second lens group G2. The second reflector 213 is used to reflect light from the third lens group G3 to the photosensitive element 23. The second reflector 213 also deflects the light path, and its placement reduces the length of the camera module 2. The second reflector 213 can be a plane mirror or a prism; this application uses a prism as an example. The material of the second reflector 213 can be light-transmitting materials such as glass or plastic; using plastic can reduce the weight of the zoom lens 21.

[0101] In summary, in the zoom lens 21 provided in this embodiment, since both the first lens group L1 and the second lens group L2 can move along the optical axis X, the zoom switching between the telephoto and wide-angle ends can be achieved by moving the first lens group L1 and the second lens group L2. Compared with related technologies, 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 and wide-angle ends, the zoom lens 21 always provides continuous optical zoom, thus ensuring that the zoom lens 21 always produces high-quality images without any quality degradation. Furthermore, integrating the lenses can reduce the overall size of the camera module 2, lower costs, and allow for the use of a large-sensor image sensor 23, thereby improving image quality (e.g., achieving high-pixel shooting and reducing the signal-to-noise ratio). Furthermore, the zoom lens 21 provided in this embodiment also includes a first reflector 212 and a second reflector 213. The first reflector 212 is used to change the propagation path of light, causing the light path to bend, so that the length direction of the camera module 2 can be consistent with the length direction or width direction of the electronic device 100. This avoids affecting the thickness design of the electronic device 100, in other words, it is beneficial to make the electronic device 100 thinner. Moreover, by placing 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 beneficial for the miniaturization of the zoom lens 21. Secondly, the second reflector 213 can also deflect the light path, and the overall length of the camera module 2 can be reduced after setting the second reflector 213.

[0102] It is understandable that, because the zoom lens 21 provided in this application is provided with a first reflector 212 and a second reflector 213, the optical axis X will be bent twice. Based on the bending points, the optical axis X is divided into a first optical axis X1, a second optical axis X2, and a third optical axis X3. Both the first optical axis X1 and the third optical axis X3 are at 90° to the second optical axis X2 (e.g., ...). Figures 4 to 6 (As shown).

[0103] Please refer to Figure 6The first reflector 212 has a first light-incident surface M21, a first light-exiting surface M23, and a first reflective surface M22. During shooting, light enters the first reflector 212 from the first light-incident surface M21, is then reflected by the first reflective surface M22, and finally exits from the first light-exiting surface M23. The second reflector 213 has a second light-incident surface M31, a second light-exiting surface M33, and a second reflective surface M32. During shooting, light enters the second reflector 213 from the second light-incident surface M31, is then reflected by the second reflective surface M32, and finally exits from the second light-exiting surface M33. The zoom lens 21 has a light-incident side C1 and a backlight side C2 that are opposite to each other. 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-exiting surface M33 is located on the backlight side C2 (e.g., ...). Figure 6 (As shown) In another embodiment, both the light-incident surface M21 and the light-exiting surface M33 are located on the light-incident side C1 (as shown). Figure 7 (As 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 beyond the outer edges of the second lens L2, the second lens group G2, and the third lens group G3, such that the first lens L1, the second lens L2, the second lens group G2, and the third lens group G3 together constitute the 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 edge of the second lens L2, the second lens group G2, and the third lens group G3, such that the second lens L2, the second lens group G2, the third lens group G3, and the photosensitive element 23 together constitute the second space Y2.

[0106] It is understandable that both the first space Y1 and the second space Y2 can be used to house electronic components within the electronic device 100. For example, the first space Y1 or the second space Y2 can serve as reserved space for the circuit board and battery of a mobile phone, which helps to reduce the thickness of the electronic device 100 and meets the requirements of lightweight design.

[0107] Please refer to Figure 9The 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 can 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, which allows for a shorter preset total length A_TTL of the zoom lens 21.

[0108] Please refer to Figure 9 The zoom lens 21 satisfies the following relationship: L_TTL / fz3 < 1.0, where 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. The ratio of 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 shorter, thereby enabling miniaturization. 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 Figure 9 The first lens group G1 includes a first lens L1 and a second lens L2. The zoom lens 21 satisfies the following relationship: NL1 > 1.9, where NL1 is the refractive index of the material of the first lens L1. NL1 can 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, which can reduce the intermediate height T_TTL and intermediate length L_TTL of the zoom lens 21, and also result in a smaller f-number (i.e., a larger aperture). The intermediate height T_TTL is the maximum height of the multiple lenses between the first reflector 212 and the second reflector 213. The intermediate length L_TTL is the distance between the first reflector 212 and the second reflector 213.

[0110] Please refer to Figure 10 It should be noted that, in Figure 10In the figure, the double-dashed line represents light. 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 relational expression: H1 > H3, where H1 is the beam width of the on-axis light 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 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 Figure 10 the first reflector 212 and the second reflector 213 are both exemplarily illustrated 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. This is only for the convenience of illustration and understanding, and should not be construed as a limitation to this 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 relational expression: -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 relational expression: 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.——, -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 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 Figure 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, where L1-P is the air gap between the first reflector 212 and the second lens L2, and H3 is the beam width of the on-axis light incident on the third lens L3 when the zoom lens 21 is at the wide-angle end. The ratio (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, which limits H3 to a smaller range and thus reduces the intermediate height T_TTL.

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

[0119] Please refer to Figure 6The zoom lens 21 also includes an aperture stop 211, which is located on the object side of the second lens group G2 or inside the second lens group G2. That is, the aperture stop 211 can be located outside the second lens group G2 or between two adjacent lenses in the second lens group G2. During zooming, the aperture stop 211 and the second lens group G2 move together. In other words, the aperture stop 211 and the second lens group G2 are relatively fixed; "relatively fixed" means that the aperture stop 211 and the second lens group G2 move synchronously together. The aperture stop 211 can be fixed to the second lens group G2 or to other components; no limitation is made here. Because the lenses in the second lens group G2 are sparsely arranged, while the lenses in the first lens group G1 are densely arranged, placing the aperture stop 211 together with the second lens group G2 makes efficient use of space. Furthermore, the radial dimensions of the lenses in the second lens group G2 are smaller, making it easier to place the aperture stop 211 together with the second lens group G2.

[0120] The zoom lens 21 provided in this application will be further described below through four specific embodiments. In each of the following embodiments, the surface type of each lens is aspherical, and the calculation formula for each aspherical surface is as follows:

[0121]

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

[0123] It should be noted that in the corresponding figures of Embodiments 1 to 4 below, the first reflector 212 and the second reflector 213 are illustrated 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. This is only for the purpose of illustration and understanding, and should not be construed as a limitation of this application.

[0124] Example 1

[0125] Please refer to Figures 11 to 12 , Figure 11 (a) in the diagram is a schematic of the zoom lens at the wide-angle end; Figure 11 (b) in the diagram is a schematic of the zoom lens at the middle end; Figure 11 (c) in the diagram is a schematic diagram of the zoom lens at the telephoto end. Figure 12 (a) in the diagram is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Figure 12(b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Figure 12 (c) in the diagram 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 arranged sequentially 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 sequentially from the object side to the image side along the optical axis X. The zoom lens 21 also includes an aperture stop 211, which is disposed 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 disposed between the first lens L1 and the second lens L2, and the second reflector 213 is disposed 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 inch.

[0128] For specific data regarding the zoom lens provided in Example 1, please refer to Tables 1 to 4.

[0129] Table 1 lists the relevant parameters of each lens, aperture, filter, and image sensor in the zoom lens of Example 1, including radius of curvature R, spacing D, refractive index Nd, Abbe coefficient Vd, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens. The units for radius of curvature R, spacing d, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens are all millimeters (mm). In Table 1, surfaces numbered 1-21 are labeled sequentially from the object side to the image side, representing the surfaces of the photographed object, each lens, aperture, filter, and the imaging surface of the image sensor. The photographed object is denoted as OBJ, the aperture as STO, and the imaging surface as IMA.

[0130] It should be noted that the interval D represents the distance D between the current surface and the next surface along the optical axis. 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 variable spacing D of the zoom lens in Example 1 when it is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0134]

[0135] Table 3 shows the k-values ​​and i-th order aspherical coefficients Ai 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 stop along the optical axis X (i.e., the interval between the image side of the second lens L2 and the object side of the aperture stop 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 between the image side of the fifth lens L5 and the object side 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 between the image side of the seventh lens L7 and the object side of the second reflector 213 along the optical axis X).

[0144] Please refer to Figures 13 to 16 , Figures 13 to 16 The relevant curves at the wide-angle end of the zoom lens are shown.

[0145] Figure 13 This is an astigmatism diagram of the zoom lens at the wide-angle end in Example 1. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555nm.

[0146] Figure 14 This is a spherical aberration diagram of the zoom lens at the wide-angle end in Example 1. The dotted lines correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0148] Figure 16 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 1. The dashed line in the diagram 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 The graph shows the relevant curves at the middle end of the zoom lens.

[0150] Figure 17 This is an astigmatism diagram when the zoom lens is at its middle position in Example 1. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555 nm.

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

[0152] Figure 19 This is a distortion diagram of the zoom lens in Example 1 when it is at the middle position. The wavelength of the light in the diagram is 555nm.

[0153] Figure 20 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at its middle position in Example 1. The dashed line in the diagram corresponds to a light wavelength of 470nm, and the solid line corresponds to a light wavelength of 650nm.

[0154] Please refer to Figures 21 to 24 , Figures 21 to 24 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0155] Figure 21 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 1. The dashed line in the diagram represents the meridian, and the solid line represents the sagitta, corresponding to a light wavelength of 555nm.

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

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

[0158] Figure 24This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 1. The dashed line in the diagram 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 given in Example 1 has good image quality at the wide-angle end, the middle end, and the telephoto end.

[0160] Example 2

[0161] Please refer to Figures 25 to 26 , Figure 25 (a) in the diagram is a schematic of the zoom lens at the wide-angle end; Figure 25 (b) in the diagram is a schematic of the zoom lens at the middle end; Figure 25 (c) in the diagram is a schematic diagram of the zoom lens at the telephoto end. Figure 26 (a) in the diagram is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Figure 26 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Figure 26 (c) in the diagram 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 arranged sequentially 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 sequentially from the object side to the image side along the optical axis X. The zoom lens 21 also includes an aperture stop 211, which is disposed 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 disposed between the first lens L1 and the second lens L2, and the second reflector 213 is disposed 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] For specific data regarding the zoom lens provided in Example 2, please refer to Tables 5 to 8.

[0165] Table 5 lists the relevant parameters of each lens, aperture, filter, and image sensor in the zoom lens of Example 2, including radius of curvature R, spacing D, refractive index Nd, Abbe number Vd, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens. The units for radius of curvature R, spacing d, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens are all millimeters (mm). In Table 5, surfaces numbered 1-21 are labeled sequentially from the object side to the image side, representing the surfaces of the photographed object, each lens, aperture, filter, and the imaging surface of the image sensor. The photographed object is denoted as OBJ, the aperture as STO, and the imaging surface as IMA.

[0166] It should be noted that the interval D represents the distance D between the current surface and the next surface along the optical axis. 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 variable spacing D of the zoom lens in Example 2 when it is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0168]

[0169] Table 7 shows the k-values ​​and i-th order aspherical coefficients Ai for 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 stop along the optical axis X (i.e., the interval between the image side of the second lens L2 and the object side of the aperture stop 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 between the image side of the fifth lens L5 and the object side 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 between the image side of the seventh lens L7 and the object side of the second reflector 213 along the optical axis X).

[0178] Please refer to Figures 27 to 30 , Figures 27 to 30 The relevant curves at the wide-angle end of the zoom lens are shown.

[0179] Figure 27 This is an astigmatism diagram when the zoom lens is at the wide-angle end in Example 2. The dashed lines represent the meridian, and the solid lines represent the sagitta, corresponding to a light wavelength of 555nm.

[0180] Figure 28 This is a spherical aberration diagram of the zoom lens at the wide-angle end in Example 2. The dotted lines correspond to a wavelength of 650nm, the solid lines to 555nm, and the dashed lines to 470nm.

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

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

[0183] Please refer to Figures 31 to 34 , Figures 31 to 34 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0184] Figure 31 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 2. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555nm.

[0185] Figure 32 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 2. The dotted lines in the diagram correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0187] Figure 34 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 2. The dashed line in the diagram 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 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0189] Figure 35 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 2. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555nm.

[0190] Figure 36 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 2. The dotted lines in the diagram correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0192] Figure 38 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 2. The dashed line in the diagram 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 given in Example 2 has good image quality at the wide-angle end, the middle end, and the telephoto end.

[0194] Example 3

[0195] Please refer to Figures 39 to 40 , Figure 39 (a) in the diagram is a schematic of the zoom lens at the wide-angle end; Figure 39 (b) in the diagram is a schematic of the zoom lens at the middle end; Figure 39 (c) in the diagram is a schematic diagram of the zoom lens at the telephoto end. Figure 40 (a) in the diagram is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Figure 40 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Figure 40 (c) in the diagram 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 arranged sequentially 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 sequentially from the object side to the image side along the optical axis X. The zoom lens 21 also includes an aperture stop 211, which is disposed 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 disposed between the first lens L1 and the second lens L2, and the second reflector 213 is disposed 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 inch.

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

[0199] Table 9 lists the relevant parameters of each lens, aperture, filter, and image sensor in the zoom lens of Example 3, including radius of curvature R, spacing D, refractive index Nd, Abbe number Vd, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens. The units for radius of curvature R, spacing d, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens are all millimeters (mm). In Table 9, surfaces numbered 1-21 are labeled sequentially from the object side to the image side, representing the surfaces of the photographed object, each lens, aperture, filter, and the imaging surface of the image sensor. The photographed object is denoted as OBJ, the aperture as STO, and the imaging surface as IMA.

[0200] It should be noted that the interval D represents the distance D between the current surface and the next surface along the optical axis. 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 variable spacing D of the zoom lens in Example 3 when it is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0204]

[0205] Table 11 shows the k-values ​​and i-th order aspherical coefficients Ai of the aspherical surfaces 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 stop along the optical axis X (i.e., the interval between the image side of the second lens L2 and the object side of the aperture stop 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 between the image side of the fifth lens L5 and the object side 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 between the image side of the seventh lens L7 and the object side of the second reflector 213 along the optical axis X).

[0215] Please refer to Figures 41 to 44 , Figures 41 to 44 The relevant curves at the wide-angle end of the zoom lens are shown.

[0216] Figure 41 This is an astigmatism diagram of the zoom lens at the wide-angle end in Example 3. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555nm.

[0217] Figure 42 This is a spherical aberration diagram of the zoom lens at the wide-angle end in Example 3. The dotted lines correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0219] Figure 44 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the wide-angle end in Example 3. The dashed line in the diagram 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 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0221] Figure 45 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 3. The dashed line in the diagram represents the meridian, and the solid line represents the sagitta, corresponding to a light wavelength of 555nm.

[0222] Figure 46 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 3. The dotted lines in the diagram correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0224] Figure 48 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 3. The dashed line in the diagram 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 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0226] Figure 49 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 3. The dashed line in the diagram represents the meridian, and the solid line represents the sagitta, corresponding to a light wavelength of 555nm.

[0227] Figure 50 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 3. The dotted lines in the diagram correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0229] Figure 52This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 3. The dashed line in the diagram 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 given 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 Figures 53 to 54 , Figure 53 (a) in the diagram is a schematic of the zoom lens at the wide-angle end; Figure 53 (b) in the diagram is a schematic of the zoom lens at the middle end; Figure 53 (c) in the diagram is a schematic diagram of the zoom lens at the telephoto end. Figure 54 (a) in the diagram is a schematic diagram of light propagation when the zoom lens is at the wide-angle end; Figure 54 (b) is a schematic diagram of light propagation when the zoom lens is at the middle end; Figure 54 (c) in the diagram 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 arranged sequentially 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 sequentially from the object side to the image side along the optical axis X. The zoom lens 21 also includes an aperture stop 211, which is disposed 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 disposed between the first lens L1 and the second lens L2, and the second reflector 213 is disposed 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 inch.

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

[0236] Table 13 lists the relevant parameters of each lens, aperture, filter, and image sensor in the zoom lens of Example 4, including radius of curvature R, spacing D, refractive index Nd, Abbe number Vd, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens. The units for radius of curvature R, spacing d, focal distance of each lens, focal length of the lens group, and focal length of the zoom lens are all millimeters (mm). In Table 13, surfaces numbered 1-21 are labeled sequentially from the object side to the image side, representing the surfaces of the photographed object, each lens, aperture, filter, and the imaging surface of the image sensor. The photographed object is denoted as OBJ, the aperture as STO, and the imaging surface as IMA.

[0237] It should be noted that the interval D represents the distance D between the current surface and the next surface along the optical axis. 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 spacing D of the zoom lens in Example 4 when it is at the wide-angle end, the middle end, and the telephoto end, respectively.

[0240]

[0241] Table 15 shows the k-values ​​and i-th order aspherical coefficients Ai of the aspherical surfaces 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 stop along the optical axis X (i.e., the interval between the image side of the second lens L2 and the object side of the aperture stop 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 between the image side of the fifth lens L5 and the object side 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 between the image side of the seventh lens L7 and the object side of the second reflector 213 along the optical axis X).

[0251] Please refer to Figures 55 to 58 , Figures 55 to 58 The relevant curves at the wide-angle end of the zoom lens are shown.

[0252] Figure 55 This is an astigmatism diagram of the zoom lens at the wide-angle end in Example 4. The dashed lines represent the meridian, and the solid lines represent the sagittal, corresponding to a light wavelength of 555nm.

[0253] Figure 56 This is a spherical aberration diagram of the zoom lens at the wide-angle end in Example 4. The dotted lines correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

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

[0256] Please refer to Figures 59 to 62 , Figures 59 to 62 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0257] Figure 59 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 4. The dashed line in the diagram represents the meridian, and the solid line represents the sagitta, corresponding to a light wavelength of 555nm.

[0258] Figure 60 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 4. The dotted lines correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

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

[0261] Please refer to Figures 63 to 66 , Figures 63 to 66 The diagram shows the relevant curves at the telephoto end of the zoom lens.

[0262] Figure 63 This is an astigmatism diagram when the zoom lens is at the telephoto end in Example 4. The dashed line in the diagram represents the meridian, and the solid line represents the sagitta, corresponding to a light wavelength of 555nm.

[0263] Figure 64 This is a spherical aberration diagram when the zoom lens is at the telephoto end in Example 4. The dotted lines correspond to a wavelength of 650 nm, the solid lines to a wavelength of 555 nm, and the dashed lines to a wavelength of 470 nm.

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

[0265] Figure 66 This is a transverse chromatic aberration diagram based on 555nm when the zoom lens is at the telephoto end in Example 4. The dashed line in the diagram 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 given in Example 4 has good image quality at the wide-angle end, the middle end, and the telephoto end.

[0267] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. A zoom lens, characterized in that, The zoom lens consists of 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 can move along the optical axis to switch the zoom between the wide-angle end and the telephoto end of the zoom lens to achieve continuous zoom. The zoom lens further includes a first reflector and a second reflector. The first reflector has a first light incident surface. The first lens group includes a first lens and a second lens. The first lens is disposed on the first light incident surface of the first reflector, and the object side surface of the first lens bulges away from the first reflector. 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. The second reflector is configured to reflect the light from the third lens group to the photosensitive element; The first lens group has a negative optical power, the second lens group has a positive optical power, and the third lens group has a negative optical power. The first lens group consists of a first lens with a positive optical power and a second lens with a negative optical power. The second lens group consists of a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with a positive optical power. The third lens group consists of a sixth lens and a seventh lens with a negative optical power; The second lens group includes a third lens. The zoom lens satisfies the following relationship: (L1 - P) / H3 < 0.4, where L1 - P is the air gap between the first reflector and the second lens, and H3 is the beam width of the axial light incident on the third lens when the zoom lens is at the wide-angle end.

2. The zoom lens as described in claim 1, characterized in that, 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 as described in claim 1, characterized in that, 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 as described in claim 1, characterized in that, 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 at the telephoto end.

5. The zoom lens as described in claim 1, characterized in that, 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 axial light incident on the first lens when the zoom lens is at the wide-angle end, and H3 is the beam width of the axial light incident on the third lens when the zoom lens is at the wide-angle end.

6. The zoom lens as described in claim 1, characterized in that, 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.

7. The zoom lens as described in claim 1, characterized in that, 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.

8. The zoom lens as described in claim 1, characterized in that, The second lens group includes a third lens, and the zoom lens satisfies the following relationship: Vd3 > 60, where Vd3 is the Abbe number of the material of the third lens.

9. The zoom lens as described in claim 1, characterized in that, 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.

10. The zoom lens as described in claim 1, characterized in that, The zoom lens satisfies the following relationship: 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.

11. The zoom lens as described in claim 1, characterized in that, The zoom lens satisfies the following relationships: P31R1 < 0, P31R2 < 0, where P31R1 is the object-side curvature radius of the lens closest to the second lens group in the third lens group, and P31R2 is the image-side curvature radius of the lens closest to the second lens group in the third lens group.

12. The zoom lens as described in any one of claims 1 to 11, characterized in that, The zoom lens further includes an aperture, the aperture is located on the object side of the second lens group or inside the second lens group, and during the zooming process of the zoom lens, the aperture and the second lens group move together.

13. The zoom lens as described in any one of claims 1 to 11, characterized in that, During the zooming process of the zoom lens from the wide-angle end to the telephoto end, the second lens group moves axially toward the object side, and the third lens group moves axially toward the object side.

14. The zoom lens as described in any one of claims 1 to 11, characterized in that, 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.

15. A camera module, characterized in that, The camera module includes a photosensitive element and the zoom lens according to any one of claims 1 to 14, and the photosensitive element is configured to receive light from the zoom lens.

16. An electronic device, characterized in that, The electronic device includes a device body and the camera module according to claim 15, and the camera module is mounted on the device body.

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