A detachable lens and a photographing apparatus

Abstract

The application relates to a detachable lens and a shooting device, the detachable lens is applied to a camera module of the shooting device, the shooting device has a first use state and a second use state, in the first use state, the shooting device is matched with a protective shell, the protective shell is provided with a first lens; the camera module comprises a first lens group and a third lens, the detachable lens and the third lens are detachably connected with the first lens group; in the first use state, the first lens, the detachable lens and the first lens group are sequentially arranged along the direction from an object to an imaging surface; in the second use state, the third lens and the first lens group are sequentially arranged along the direction from the object to the imaging surface. Through the detachable lens arranged in the shooting device and the dismounting, the shooting device can realize a large shooting angle and high definition when being applied to underwater and water surface, the shooting effect is improved, the convenience of the shooting device is improved, and the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of optical imaging technology, and in particular to a detachable lens and imaging device. Background Technology

[0002] Currently, with the development of optical imaging technology, imaging devices are being used more and more widely in various special scenarios, such as panoramic cameras for imaging above and below water.

[0003] However, when panoramic cameras are used underwater, the difference in refractive index between water and air means that using the same optical system as the surface solution will result in a decrease in the clarity of the underwater image. Furthermore, the change in refractive index reduces the lens's field of view, making it difficult to guarantee panoramic imaging. In related technologies, to improve the imaging effect of panoramic cameras, two different optical systems are typically required for surface and underwater scenarios. This increases production costs and reduces the portability and ease of use of the shooting device, negatively impacting the user experience. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this application provides a detachable lens and an imaging device.

[0005] According to a first aspect of this application, a detachable lens is provided for use in a shooting device, the shooting device including a camera module, the shooting device having a first use state and a second use state, wherein in the first use state, the shooting device cooperates with a protective shell, and the protective shell is provided with a first lens; The camera module includes a first lens group and a third lens. The detachable lens is detachably connected to the first lens group, and the third lens is detachably connected to the first lens group. In the first usage state, the first lens, the detachable lens, and the first lens group are arranged sequentially along the direction from the object to the imaging surface; In the second usage state, the third lens and the first lens group are arranged sequentially along the direction from the object being photographed to the imaging surface.

[0006] In one possible implementation, the camera module is a wide-angle camera module with a field of view ≥180°.

[0007] In one possible implementation, the first lens and the detachable lens have negative optical power, and the focal length of the detachable lens ranges from -50mm to -2mm.

[0008] In one possible implementation, the system focal length of the shooting device in the first usage state and the system focal length of the shooting device in the second usage state satisfy the following condition: 1 < F2 / F1 < 2; Wherein, F1 is the system focal length of the shooting device in the first usage state, and F2 is the system focal length of the shooting device in the second usage state.

[0009] In one possible implementation, the core thickness of the detachable lens, the core thickness of the third lens, the air gap between the detachable lens and the first lens group, and the air gap between the third lens and the first lens group satisfy the following conditions: -0.5≤|CT2+H2|-|CT3+H3|≤0.5; Wherein, CT2 is the core thickness of the detachable lens, CT3 is the core thickness of the third lens, H2 is the air gap between the detachable lens and the first lens group, and H3 is the air gap between the third lens and the first lens group.

[0010] In one possible implementation, the height of the detachable lens at its maximum effective aperture and the height of the third lens at its maximum effective aperture satisfy the following condition: -0.02≤|SG3|-|SG2|≤0.02; Wherein, SG2 is the height of the detachable lens at its maximum effective aperture, and SG3 is the height of the third lens at its maximum effective aperture.

[0011] In one possible implementation, the focal length of the third lens ranges from -50mm to -2mm, and the focal length of the detachable lens and the focal length of the third lens satisfy the following conditions: 0<∣f2∣-∣f3∣<3mm; Where f2 is the focal length of the detachable lens and f3 is the focal length of the third lens.

[0012] In one possible implementation, the effective light-transmitting aperture of the first lens on the side closer to the subject and the effective light-transmitting aperture of the detachable lens on the side closer to the subject satisfy the following conditions: 1 < CA1 / CA2 < 10; The effective light-transmitting aperture of the first lens on the side closer to the subject and the effective light-transmitting aperture of the third lens on the side closer to the subject satisfy the following conditions: 1 < CA1 / CA3 < 10; Wherein, CA1 is the effective light-transmitting aperture of the first lens on the side closest to the subject, CA2 is the effective light-transmitting aperture of the detachable lens on the side closest to the subject, and CA3 is the effective light-transmitting aperture of the third lens on the side closest to the subject.

[0013] In one possible implementation, the first lens has a first surface near the object being photographed and a second surface near the imaging surface, wherein the radii of curvature of the first surface and the radii of curvature of the second surface satisfy the following condition: 0 < R 11 / R 12 ≤2; Among them, R 11 R is the radius of curvature of the first surface. 12 Let be the radius of curvature of the second surface.

[0014] In one possible implementation, the detachable lens has a third surface near the subject and a fourth surface near the imaging surface, and the third lens has a fifth surface near the subject and a sixth surface near the imaging surface. The radius of curvature of the third surface and the radius of curvature of the fourth surface satisfy the following condition: 0 < R 21 / R 22 ≤5; The radius of curvature of the fifth surface and the radius of curvature of the sixth surface satisfy the following condition: 0 < R 31 / R 32 ≤5; Among them, R 21 R is the radius of curvature of the third surface. 22 R is the radius of curvature of the fourth surface. 31 R is the radius of curvature of the fifth surface. 32 Let be the radius of curvature of the sixth surface.

[0015] In one possible implementation, the focal length f1 of the first lens satisfies the following condition: -3000mm≤f1≤-100mm.

[0016] In one possible implementation, the distance T0 between the first lens and the detachable lens satisfies the following condition: 5mm < T0 < 50mm.

[0017] In one possible implementation, the refractive index Vd of the detachable lens satisfies the following condition: 1.4≤Vd≤2.0.

[0018] According to a second aspect of this application, a shooting device is provided, including the detachable lens described in the first aspect of this application.

[0019] In one possible implementation, the shooting device is configured as a panoramic camera, which includes at least two camera modules and at least two detachable lenses, the at least two detachable lenses working together with the at least two camera modules to achieve panoramic imaging.

[0020] In one possible implementation, the camera module further includes a third lens and a first lens group, the detachable lens is detachably connected to the first lens group, the third lens is detachably connected to the first lens group, and the shooting device has a first usage state and a second usage state. In the first usage state, the camera module includes a first lens, a detachable lens, and a first lens group arranged sequentially along the direction from the object being photographed to the imaging surface; In the second usage state, the camera module includes the third lens and the first lens group arranged sequentially along the direction from the object being photographed to the imaging surface.

[0021] The beneficial effects of this application's embodiments are as follows: by setting a detachable lens in the shooting device and allowing it to be replaced, this application enables the shooting device to achieve a larger shooting angle and higher clarity in different application scenarios, which is beneficial to improving the shooting effect and enhancing the user experience.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] Figure 1 This is one of the structural schematic diagrams of a shooting device shown according to a first exemplary embodiment.

[0025] Figure 2 This is a second schematic diagram of the structure of the imaging device shown according to the first exemplary embodiment.

[0026] Figure 3 This is one of the structural schematic diagrams of a shooting device shown according to a second exemplary embodiment.

[0027] Figure 4 This is a second schematic diagram of the structure of the imaging device shown according to the second exemplary embodiment.

[0028] Figure 5 This is one of the structural schematic diagrams of a shooting device shown according to a third exemplary embodiment.

[0029] Figure 6 This is a second schematic diagram of the structure of the imaging device shown according to the third exemplary embodiment.

[0030] Figure 7 This is one of the structural schematic diagrams of a shooting device shown according to a fourth exemplary embodiment.

[0031] Figure 8 This is a second schematic diagram of the structure of the imaging device shown according to the fourth exemplary embodiment.

[0032] Figure 9 This is one of the structural schematic diagrams of a shooting device shown according to a fifth exemplary embodiment.

[0033] Figure 10 This is a second schematic diagram of the structure of the imaging device shown according to the fifth exemplary embodiment.

[0034] Figure 11 It is an optical transfer function curve of the imaging device in a first usage state according to a first exemplary embodiment.

[0035] Figure 12 It is an optical transfer function curve of the imaging device in a second usage state according to the first exemplary embodiment.

[0036] Figure 13 It is an optical transfer function curve of the imaging device in the first use state according to the second exemplary embodiment.

[0037] Figure 14 It is an optical transfer function graph of the imaging device in a second usage state according to a second exemplary embodiment.

[0038] Figure 15 It is an optical transfer function curve of the imaging device in the first use state according to the third exemplary embodiment.

[0039] Figure 16 It is an optical transfer function curve of the imaging device in a second usage state as shown in the third exemplary embodiment.

[0040] Figure 17 It is an optical transfer function curve of the imaging device in the first use state according to the fourth exemplary embodiment.

[0041] Figure 18 It is an optical transfer function curve of the imaging device in the second use state according to the fourth exemplary embodiment. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0043] Currently, with the development of optical imaging technology, imaging devices are being used more and more widely in various special scenarios, such as panoramic cameras for imaging above and below water.

[0044] However, when panoramic cameras are used underwater, the difference in refractive index between water and air means that using the same optical system as the surface solution will result in a decrease in the clarity of underwater images. Furthermore, the change in refractive index reduces the lens's field of view, making it difficult to guarantee successful underwater panoramic imaging. In related technologies, to improve the imaging effect of panoramic cameras, two different optical systems are typically required for surface and underwater scenarios. This increases production costs and reduces the portability and ease of use of the shooting device, negatively impacting the user experience.

[0045] To address the aforementioned technical problems, this application proposes a detachable lens and an imaging device. By incorporating a detachable lens into the imaging device and allowing for its assembly and disassembly, this application eliminates the need for two different optical systems to be replaced. Through the assembly and disassembly of the detachable lens alone, the imaging device can achieve a wider shooting angle and higher clarity when used both above and below water. This improves the shooting effect, enhances the ease of use of the imaging device, and thus improves the user experience.

[0046] According to an exemplary embodiment, such as Figures 1-8 As shown, this application embodiment provides a detachable lens, which is applied to the camera module of an imaging device. In this application embodiment, the detachable lens is... Figures 1-8 The second lens 20 shown is used as an example for facilitating understanding and description; for this purpose, the detachable lens will be explained using the second lens 20 as an example later. The shooting device can be, for example, a wide-angle camera, a panoramic camera, a mobile phone, a tablet computer, or other electronic devices with shooting capabilities. The shooting device has a first usage state and a second usage state, in which the refractive index of the medium differs. Taking panoramic camera imaging above and below water as an example, the first usage state can be underwater, with water as the medium, and the second usage state can be above water, with air as the medium.

[0047] When the shooting device is in its first operating state, it works in conjunction with a protective housing (not shown in the figure). The protective housing is equipped with a first lens 10, which provides a sealed and waterproof protection for the shooting device; it can also be called a waterproof housing or a diving housing. The first lens 10 on the protective housing serves both a protective function and is used for imaging. The first lens 10 is fixed to the protective housing, and the protective housing and the shooting device are detachably connected, meaning the first lens 10 is detachable from the shooting device. When the shooting device is used in different scenarios, the system focal length of the shooting device can be adjusted by removing or installing the first lens 10 to achieve better shooting results.

[0048] For example, when the shooting device is used for underwater shooting, a first lens 10 can be installed. The first lens 10 works with the camera module to form an image, thereby increasing the field of view, expanding the shooting range and improving the shooting clarity. When the shooting device is used for shooting on water, since the refractive index of air is lower than that of water, the first lens 10 can be removed to ensure the clarity when shooting on water, so that the shooting device can achieve good shooting results in both the first and second use states.

[0049] The camera module of the shooting device includes a first lens group 21 and a third lens 30. The second lens 20 and the third lens 30 are detachably connected to the first lens group 21. By replacing the second lens 20 and the third lens 30, the shooting device can be switched between a first and a second usage state, ensuring good imaging performance in both states without loss of shooting angle or image clarity due to changes in the refractive index of the medium. In the first usage state, the first lens 10, the second lens 20, and the first lens group 21 jointly form the image; in the second usage state, the first lens 10 is detached, and the image is formed through the third lens 30 and the first lens group 21.

[0050] When the shooting device is in its first operating state, the first lens 10, the second lens 20, and the first lens group 21 move along the subject (located in...) Figures 1-8 The objects (41, not shown in the figure) are arranged sequentially along the optical path 43 from the image plane 42, with the optical axes of each lens coinciding with the optical path 43. Figures 1-8 Taking the orientation shown as an example, the first lens 10, the second lens 20, and the first lens group 21 are along... Figures 1-8The lenses are arranged sequentially from left to right. When the shooting device is in the second operating state, the third lens 30 and the first lens group 21 are arranged sequentially along the direction from the object to the imaging plane 42. That is, when the shooting device is in the first operating state, the first lens 10 and the second lens 20 are installed; when the shooting device is in the second operating state, the first lens 10 is removed and the second lens 20 is replaced with the third lens 30. By installing and removing the first lens 10 and replacing the second lens 20 with the third lens 30, the switching between the first operating state and the second operating state can be achieved, making the control convenient and easy to implement.

[0051] In this embodiment, a detachable lens is provided, and by replacing the detachable lens, the lens involved in imaging in the first and second use states of the shooting device is changed, thereby enabling the shooting device to achieve a larger shooting angle and higher clarity in both the first and second use states, which is beneficial to improving the shooting effect and enhancing the user experience.

[0052] In some embodiments, the shooting device is a wide-angle shooting device, such as a wide-angle camera or a panoramic camera. The camera module of the shooting device is a wide-angle camera module with a field of view ≥180°. For example, the field of view of the wide-angle camera module can be set to 190°. Of course, it is understood that the field of view of the wide-angle camera module can also be set to other angles, and this application embodiment does not impose excessive restrictions on this.

[0053] In some embodiments, the first lens 10 and the second lens 20 can be convex-concave lenses, i.e., meniscus lenses. The convex surfaces of the first lens 10 and the second lens 20 both face the object side 41, and the concave surfaces face the imaging surface 42. It is understood that those skilled in the art can also adjust at least one of the first lens 10 and the second lens 20 to other shapes according to actual design needs, and the embodiments of this application do not impose excessive limitations on this.

[0054] In some embodiments, both the first lens 10 and the second lens 20 are negative optical power. The imaging device achieves a larger field of view by using a combination of negative optical power lenses, thereby expanding the shooting range.

[0055] In one example, the focal length f1 of the first lens 10 ranges from -3000mm to -100mm, that is, -3000mm ≤ f1 ≤ -100mm. Here, f1 can be set to -3000mm, -1600mm, -300mm, -100mm, etc. Of course, it is understood that the focal length of the first lens 10 is not limited to the specific values ​​listed in the embodiments of this application, and those skilled in the art can set it according to actual needs.

[0056] In one example, the focal length of the second lens 20 can be set to a range of -50mm to -2mm. For example, the focal length of the second lens 20 can be selected as -50mm, -20mm, -2mm, etc. Of course, it is understood that the focal length of the second lens 20 is not limited to the specific values ​​listed in the embodiments of this application. Those skilled in the art can set the focal length of the second lens 20 according to actual needs.

[0057] In some embodiments, the third lens 30 has a negative optical power. For example, the focal length of the third lens 30 ranges from -50mm to -2mm, the focal length of the second lens is f2, and the focal length of the third lens is f3. Then f2 and f3 satisfy the condition: 0 < |f2| - |f3| < 3mm, so as to ensure the imaging effect of the imaging device.

[0058] In some embodiments, the first lens group 21 has a negative optical power. The first lens group 21 may include a plurality of identical or at least partially different lenses. All of the lenses in the first lens group 21 may have a negative optical power, or some lenses may have a positive optical power and some lenses may have a negative optical power. The embodiments of this application do not impose too many restrictions on this. Those skilled in the art can adjust the specific parameters of each lens in the shooting device according to design requirements.

[0059] In some embodiments, the first lens group includes at least one of a biconvex lens, a plano-convex lens, a concave-convex lens, a plane lens, a biconcave lens, a plano-concave lens, and a convex-concave lens. The number, shape, and arrangement order of the lenses in the first lens group 21 can be set by those skilled in the art according to actual needs, and the embodiments of this application do not impose excessive limitations.

[0060] In some embodiments, the second lens 20 and the first lens group 21 of the shooting device constitute a first lens group, which is detachable as a whole. The shooting device also includes a detachable second lens group, which includes a third lens 30 and a second lens group. When the shooting device is in a first use state, the first lens 10 and the first lens group are installed. When the shooting device is in a second use state, the first lens 10 is removed and the first lens group is replaced with the second lens group. By installing and removing the first lens 10 and replacing the first lens group with the second lens group, the first use state and the second use state can be switched. The second lens 20 and the first lens group 21 can be replaced as a whole as the first lens group without having to separately disassemble and install specific lenses in the first lens group. This reduces the risk of wear or scratches when disassembling and installing individual lenses, and improves the stability and safety of the shooting device.

[0061] In the first operating state, the imaging device images through the first lens 10 and the first lens group. The first lens group includes a second lens 20 and a first lens group 21, which are arranged sequentially along the direction from the object to the imaging surface 42. In the second operating state, the imaging device images through the second lens group. The second lens group includes a third lens 30 and a second lens group, which are arranged sequentially along the direction from the object to the imaging surface.

[0062] In the above embodiments, the second lens group can be the same size as the first lens group 21 to ensure that the installation size matches. The number, shape, arrangement order and other parameters of the lenses can be exactly the same or at least partially different. Those skilled in the art can set them according to actual needs. This application does not impose too many restrictions on this.

[0063] In some embodiments, the system focal length of the shooting device is different in the first usage state and the second usage state. For example, the system focal length of the shooting device is F1 in the first usage state and F2 in the second usage state. Then F2 and F1 satisfy the condition: 1 < F2 / F1 < 2, to ensure that the shooting device has good shooting effect in both the first and second usage states.

[0064] In some embodiments, the imaging device achieves the transition between a first usage state and a second usage state by installing and removing the first lens 10 and replacing the second lens 20 and the third lens 30, wherein the core thickness and air gap size of the second lens 20 and the third lens 30 are matched.

[0065] The core thickness of the second lens 20 is CT2, the core thickness of the third lens 30 is CT3, the air gap between the second lens 20 and the first lens group 21 is H2, and the air gap between the third lens 30 and the first lens group 21 is H3. CT2, CT3, H2, and H3 satisfy the condition: -0.5≤|CT2+H2|-|CT3+H3|≤0.5, to ensure that the dimensions of the second lens 20 and the third lens 30 are matched. That is, when replacing the second lens 20 and the third lens 30, the overall dimensions of the lens and the air gap of the imaging device are the same or approximately the same, so that the lens can be directly replaced without changing the lens barrel structure, thus achieving structural universality.

[0066] In some embodiments, the imaging device achieves the transition between a first usage state and a second usage state by installing and removing the first lens 10 and replacing the first lens group and the second lens group, wherein the core thickness and air gap size of the first lens group and the second lens group are matched.

[0067] The first lens group includes a second lens 20 and a first lens group 21. The second lens group includes a third lens 30 and a second lens group. The core thickness of the second lens 20 is CT2, the core thickness of the third lens 30 is CT3, the air gap between the second lens 20 and the first lens group 21 is H2, and the air gap between the third lens 30 and the second lens group is H. 31 Then CT2, CT3, H2 and H 31 The condition is satisfied: -0.5 ≤ |CT² + H²| - |CT³ + H 31 |≤0.5, to ensure that the dimensions of the first lens group and the second lens group are matched. That is, when replacing between the first lens group and the second lens group, the dimensions of the first lens group or the second lens group and the air gap are the same or approximately the same, so it will not affect the size of the shooting device, and the lens group can be replaced without changing the lens barrel structure.

[0068] In some embodiments, the imaging device achieves the transition between a first usage state and a second usage state by installing and removing the first lens 10 and replacing the second lens 20 and the third lens 30, wherein the sagittal dimensions of the second lens 20 and the third lens 30 are matched.

[0069] The sagitta at the maximum aperture of the second lens 20 is SG2, and the sagitta at the maximum aperture of the third lens 30 is SG3. SG2 and SG3 satisfy the condition: -0.02≤|SG3|-|SG2|≤0.02. This condition ensures that the sagitta dimensions of the second lens 20 and the third lens 30 are matched, that is, the same or approximately the same, so that the second lens 20 and the third lens 30 can share the pressure ring.

[0070] In some embodiments, the effective light-passing apertures of the second lens 20 and the third lens 30 on the side closest to the subject are both related to the effective light-passing aperture of the first lens 10 on the side closest to the subject, to ensure the light-passing effect of the shooting device. Wherein, the effective light-passing aperture of the first lens 10 on the side closest to the subject is CA1, the effective light-passing aperture of the second lens 20 on the side closest to the subject is CA2, and the effective light-passing aperture of the third lens 30 on the side closest to the subject is CA3. Then, CA1 and CA2 satisfy the condition: 1 < CA1 / CA2 < 10; and CA1 and CA3 satisfy the condition: 1 < CA1 / CA3 < 10.

[0071] In some embodiments, the radii of curvature of the surfaces of the first lens 10 near the object being photographed and near the imaging surface 42 may be the same or different. The first lens 10 has a first surface 101 near the object being photographed and a second surface 102 near the imaging surface 42, and the radius of curvature of the first surface 101 is R. 11The radius of curvature of the second surface 102 is R. 12 Then R 11 and R 12 The condition is satisfied: 0 < R 11 / R 12 ≤2. When R 11 / R 12 When the value is 1, the radii of curvature of the surfaces of the first lens 10 near the object and near the imaging surface 42 are the same. 11 / R 12 When the value is not 1, the surface curvature radii of the first lens 10 near the object being photographed and near the imaging surface 42 are different. Those skilled in the art can set it according to actual needs, and this application embodiment does not impose too many restrictions on this.

[0072] In some embodiments, the radii of curvature of the surfaces of the second lens 20 near the object and near the imaging surface 42 may be the same or different. The second lens 20 has a third surface 201 near the object and a fourth surface 202 near the imaging surface 42, and the radius of curvature of the third surface 201 is R. 21 The radius of curvature of the fourth surface 202 is R. 22 Then R 21 and R 22 The condition is satisfied: 0 < R 21 / R 22 ≤5.

[0073] In some embodiments, the radii of curvature of the surfaces of the third lens 30 near the object and near the imaging surface 42 may be the same or different. The third lens 30 has a fifth surface 301 near the object and a sixth surface 302 near the imaging surface 42, and the radius of curvature of the fifth surface 301 is R. 31 The radius of curvature of the sixth surface 302 is R. 32 Then R 31 and R 32 The condition is satisfied: 0 < R 31 / R 32 ≤5.

[0074] In some embodiments, the first surface 101, the second surface 102, the third surface 201, the fourth surface 202, the fifth surface 301, and the sixth surface 302 can all be configured as spherical or aspherical surfaces, and this application embodiment does not impose too many restrictions on this. Among them, an aspherical surface refers to a curved surface whose surface curvature is different from that of a conventional sphere.

[0075] In some embodiments, the distance T0 between the first lens 10 and the second lens 20 is between 5mm and 50mm, that is, T0 satisfies the condition: 5mm < T0 < 50mm. The value of T0 can be 10mm, 20mm, 40mm, etc.

[0076] When the second lens 20 in the imaging device is replaced with the third lens 30, or the first lens group is replaced with the second lens group, the distance T1 between the first lens 10 and the third lens 30 is between 5mm and 50mm. Normally, T1 is equal to T0. Those skilled in the art can adjust the distance according to actual design requirements, so that there is a difference between T1 and T0. This application embodiment does not impose excessive restrictions on this. Of course, it is understood that this application embodiment does not impose excessive restrictions on the specific value of the distance between the first lens 10 and the second lens 20 or the third lens 30. Those skilled in the art can set it according to actual needs.

[0077] In some embodiments, the refractive index Vd of the second lens 20 ranges from 1.4 to 2.0, that is, the refractive index Vd of the second lens 20 satisfies the condition: 1.4 ≤ Vd ≤ 2.0. Additionally, the refractive index of the third lens 30 can also range from 1.4 to 2.0. The refractive indices of the second lens 20 and the third lens 30 can be the same or different, that is, their materials can be the same or different. This application does not impose excessive restrictions on this aspect.

[0078] In some embodiments, such as Figures 9-10 As shown, the optical path 43 of the imaging device can have a folding effect. Specifically, the optical axes of the second lens 20 and the third lens 30 coincide with the straight line containing the optical axis of the first lens 10. At least some of the lenses in the first lens group 21 can have a preset angle between their optical axes and the optical axis of the first lens 10. That is, the optical path 43 of the imaging device has a folding effect, and the light emitted by the object undergoes at least one refraction when it passes through the imaging device to form an image. Of course, it is understood that in this embodiment, the light emitted by the object side 41 undergoes one refraction when it passes through the imaging device to form an image, and the optical axes of some of the lenses in the first lens group 21 are perpendicular to the optical axis of the first lens 10. In actual design and production, those skilled in the art can also adjust the number of folds and the angle of the optical path 43 based on factors such as design size, lens parameters, and field of view requirements. This embodiment does not impose too many restrictions on this.

[0079] The parameters of the imaging device in the embodiments of this application will be explained below with specific examples.

[0080] In the first example, refer to Figures 1-2 As shown in Table 1 below.

[0081] Table 1. Relevant parameters of each lens in the imaging device

[0082] It is worth noting that the surface type of the object side 41 in Table 1 is spherical with an infinite radius of curvature. That is, for ease of understanding and calculation, the object side 41 is regarded as a plane. The thickness of the photographed object in Table 1 actually represents the distance between the photographed object and the first lens 10, which can be, for example, 1000mm.

[0083] Referring to Table 1, the radius of curvature R of the first surface 101 11 The radius of curvature R of the second surface 102 is 56.2289 mm. 12 If it is 51.7504mm, then R 11 / R 12 The value is 1.08, satisfying the condition 0 < R mentioned earlier. 11 / R 12 The condition is ≤2. The radius of curvature R of the third surface 201. 21 The radius of curvature R of the fourth surface 202 is 20.139 mm. 22 If it is 7.382mm, then R 21 / R 22 The value is 2.72, which satisfies the condition 0 < R mentioned earlier. 21 / R 22 The condition is ≤5. The radius of curvature R of the fifth surface 301. 31 The radius of curvature R of the sixth surface 302 is 17.352 mm. 32 If it is 6.728mm, then R 31 / R 32 The value is 2.58, satisfying the condition 0 < R mentioned earlier. 31 / R 32 ≤5 conditions.

[0084] In this example, the second lens 20 and the third lens 30 are made of the same material, while the first lens 10 is made of a different material than the second lens 20 and the third lens 30. The material of a lens can be reflected by its refractive index and Abbe number. The refractive index of a lens is the ratio of the speed of light in a vacuum to the speed of light within the lens. The Abbe number is an index used to represent the dispersion capability of a transparent medium. Generally, the higher the refractive index, the more severe the dispersion, and the smaller the Abbe number; conversely, the lower the refractive index, the less severe the dispersion, and the larger the Abbe number. In this example, the refractive index of the first lens 10 is 1.4918, and its Abbe number is 57.441. The refractive indices Vd of the second lens 20 and the third lens 30 are both 1.91, and their Abbe numbers are both 35.25, satisfying the condition 1.4 ≤ Vd ≤ 2.0 mentioned earlier.

[0085] In this example, to achieve wide-angle imaging, the field of view of the camera module of the shooting device needs to be greater than 180°. For example, the field of view of the camera module can be set to 190°. Also, in this example, the distance T0 between the first lens 10 and the second lens 20 is 42mm, meaning T0 satisfies the condition 5mm < T0 < 50mm mentioned earlier. In the first usage state, the system focal length F1 of the shooting device is 1.346mm, and in the second usage state, the system focal length F2 is 1.747mm. The value of F2 / F1 is 1.31, satisfying the condition 1 < F2 / F1 < 2 mentioned earlier.

[0086] The focal length f1 of the first lens 10 is -1671mm, satisfying the condition -3000mm≤f1≤-100mm mentioned earlier. The focal length f2 of the second lens is -13.64mm, and the focal length f3 of the third lens is -13.06mm. Both of these values ​​are within the range of -50mm to -2mm, and the value of |f2| - |f3| is 0.58, satisfying the condition 0 < |f2| - |f3| < 3mm mentioned earlier, which ensures the imaging effect of the imaging device.

[0087] The effective light-transmitting aperture of the first lens 10 near the object (i.e., the first surface 101) is CA1, the effective light-transmitting aperture of the second lens 20 near the object (i.e., the third surface 201) is CA2, and the effective light-transmitting aperture of the third lens 30 near the object is CA3. In this example, the values ​​of CA1 / CA2 and CA1 / CA3 are both 5.3, which satisfies the conditions 1 < CA1 / CA2 < 10 and 1 < CA1 / CA3 < 10 mentioned above.

[0088] In summary, in this example, all parameters of the imaging device meet the corresponding conditions, and the imaging device can achieve better imaging results, thus satisfying the design requirements of the imaging device.

[0089] Furthermore, referring to Table 1, it can be seen that both the first surface 101 and the second surface 102 of the first lens 10 are aspherical surfaces. An aspherical surface is a curved surface whose curvature differs from that of a conventional sphere. Specifically, both the first surface 101 and the second surface 102 satisfy the following surface expression: ; In the above surface expression, z represents the distance of the surface from the vertex of the surface in the direction of the optical axis, c represents the curvature of the vertex of the surface, K represents the quadratic surface coefficient, h represents the distance from the optical axis to the surface, and B, C, D, E, F, G, and H are the fourth, sixth, eighth, tenth, twelfth, fourteenth, and sixteenth order surface coefficients in the above aspherical surface expression, respectively. The values ​​of each coefficient can be selected by those skilled in the art according to design needs. This application embodiment does not impose too many restrictions on this. In subsequent examples, when other surfaces are aspherical, the above surface expression can also be referred to and the coefficients therein can be adjusted. This will not be elaborated further below.

[0090] Combination Figures 11-12 As shown in the example, the horizontal axis represents the focus shift in millimeters (mm), and the vertical axis represents the optical transfer function (OTF). Different curves represent the OTF curves under different fields of view. The OTF curve of the shooting device in its first operating state is shown in the figure below. Figure 11 As shown, the optical transfer function curve of the imaging device in its second operating state is as follows: Figure 12 As shown, the closer the OTF value is to 1, the lower the dispersion between different optical transfer function curves, indicating a more ideal imaging effect. Figure 9 and Figure 10 It can be concluded that the imaging device in this example has good imaging effect in both the first and second use states, and can achieve an imaging effect close to that in the second use state in the first use state. The imaging of the imaging device is less affected by the refractive index of the medium, which greatly improves the imaging of the imaging device and enhances the user experience.

[0091] In the second example, refer to Figures 3-4 As shown in Table 2 below.

[0092] Table 2. Relevant parameters of each lens in the imaging device

[0093] Referring to Table 2, the radius of curvature R of the first surface 101 11 The radius of curvature R of the second surface 102 is 56.2289 mm. 12 If it is 51.7504mm, then R 11 / R 12 The value is 1.08, satisfying the condition 0 < R mentioned earlier. 11 / R 12 The condition is ≤2. The radius of curvature R of the third surface 201. 21 The radius of curvature R of the fourth surface 202 is 35.1802 mm.22 If it is 36.2987mm, then R 21 / R 22 The value is 0.96, which satisfies the condition 0 < R mentioned earlier. 21 / R 22 The condition is ≤5. The radius of curvature R of the fifth surface 301. 31 The radius of curvature R of the sixth surface 302 is 23.9886 mm. 32 If it is 7.9819mm, then R 31 / R 32 The value is 3.01, satisfying the condition 0 < R mentioned above. 31 / R 32 ≤5 conditions.

[0094] The refractive indices and Abbe numbers of the first lens 10, the second lens 20, and the third lens 30 are the same as those in the first example above, and will not be repeated here. The refractive indices Vd of the second lens 20 and the third lens 30 satisfy the condition 1.4≤Vd≤2.0 mentioned above.

[0095] In this example, the field of view of the camera module is 190°. The distance T0 between the first lens 10 and the second lens 20 is 28mm, meaning T0 satisfies the condition 5mm < T0 < 50mm mentioned earlier. The system focal length F1 of the shooting device in the first usage state is 1.362mm, and the system focal length F2 of the shooting device in the second usage state is 1.765mm. The value of F2 / F1 is 1.29, satisfying the condition 1 < F2 / F1 < 2 mentioned earlier.

[0096] The focal length f1 of the first lens 10 is -359.76mm, satisfying the condition -3000mm≤f1≤-100mm mentioned earlier. The focal length f2 of the second lens is -13.8mm, and the focal length f3 of the third lens is -13.06mm. Both of these values ​​are within the range of -50mm to -2mm, and the value of |f2| - |f3| is 0.74, satisfying the condition 0 < |f2| - |f3| < 3mm mentioned earlier.

[0097] The effective aperture of the first lens 10 near the subject is CA1, the effective aperture of the second lens 20 near the subject is CA2, and the effective aperture of the third lens 30 near the subject is CA3. In this example, the values ​​of CA1 / CA2 and CA1 / CA3 are both 3.67, which satisfies the conditions 1 < CA1 / CA2 < 10 and 1 < CA1 / CA3 < 10 mentioned above.

[0098] In summary, in this example, all parameters of the imaging device meet the corresponding conditions, and the imaging device can achieve better imaging results, thus satisfying the design requirements of the imaging device.

[0099] Combination Figures 13-14 As shown in the figure, in this example, the optical transfer function curve of the imaging device in its first operating state is as follows: Figure 13 As shown, the optical transfer function curve of the imaging device in its second operating state is as follows: Figure 14 As shown, comparison Figure 13 and Figure 14 It can be concluded that the imaging device in this example has good imaging effect in both the first and second use states, and the imaging effect in the first use state can reach the imaging effect of the second use state. The imaging of the imaging device is less affected by the refractive index of the medium, which greatly improves the imaging of the imaging device and enhances the user experience.

[0100] In the third example, refer to Figures 5-6 As shown in Table 3 below.

[0101] Table 3. Relevant parameters of each lens in the camera module

[0102] Referring to Table 3, the radius of curvature R of the first surface 101 11 The radius of curvature R of the second surface 102 is 36.3921 mm. 12 If it is 30.2454mm, then R 11 / R 12 The value is 1.203, satisfying the condition 0 < R mentioned earlier. 11 / R 12 The condition is ≤2. The radius of curvature R of the third surface 201. 21 The radius of curvature R of the fourth surface 202 is 13.561 mm. 22 If it is 3.7mm, then R 21 / R 22 The value is 3.66, which satisfies the condition 0 < R mentioned earlier. 21 / R 22 The condition is ≤5. The radius of curvature R of the fifth surface 301. 31 The radius of curvature R of the sixth surface 302 is 12.5875 mm. 32 If it is 3.3286mm, then R 31 / R 32 The value is 3.78, which satisfies the condition 0 < R mentioned earlier. 31 / R 32 ≤5 conditions.

[0103] The refractive indices and Abbe numbers of the first lens 10, the second lens 20, and the third lens 30 are the same as those in the first example above, and will not be repeated here. The refractive indices Vd of the second lens 20 and the third lens 30 satisfy the condition 1.4≤Vd≤2.0 mentioned above.

[0104] In this example, the field of view of the camera module is 190°. The distance T0 between the first lens 10 and the second lens 20 is 25mm, meaning T0 satisfies the condition 5mm < T0 < 50mm mentioned earlier. In the first usage state, the system focal length F1 of the shooting device is 1.2841mm, and in the second usage state, the system focal length F2 is 1.0037mm. The value of F2 / F1 is 1.279, satisfying the condition 1 < F2 / F1 < 2 mentioned earlier.

[0105] The focal length f1 of the first lens 10 is -447mm, satisfying the condition -3000mm≤f1≤-100mm mentioned earlier. The focal length f2 of the second lens is -6.15mm, and the focal length f3 of the third lens is -5.51mm. Both of these values ​​are within the range of -50mm to -2mm, and the value of |f2| - |f3| is 0.64, satisfying the condition 0 < |f2| - |f3| < 3mm mentioned earlier.

[0106] The effective aperture of the first lens 10 near the subject is CA1, the effective aperture of the second lens 20 near the subject is CA2, and the effective aperture of the third lens 30 near the subject is CA3. In this example, the values ​​of CA1 / CA2 and CA1 / CA3 are both 5, which satisfies the conditions 1 < CA1 / CA2 < 10 and 1 < CA1 / CA3 < 10 mentioned above.

[0107] In summary, in this example, all parameters of the camera module meet the corresponding conditions, and the camera module can achieve better imaging results, thus satisfying the design requirements of the camera module.

[0108] Combination Figures 15-16 As shown in the figure, in this example, the optical transfer function curve of the imaging device in its first operating state is as follows: Figure 15 As shown, the optical transfer function curve of the imaging device in its second operating state is as follows: Figure 16 As shown, comparison Figure 15 and Figure 16 It can be concluded that the imaging device in this example has good imaging effect in both the first and second use states, and the imaging effect in the first use state can reach the imaging effect of the second use state. The imaging of the imaging device is less affected by the refractive index of the medium, which greatly improves the imaging of the imaging device and enhances the user experience.

[0109] In the fourth example, refer to Figures 7-8 As shown in Table 4 below.

[0110] Table 4. Relevant parameters of each lens in the camera module

[0111] Referring to Table 4, the radius of curvature R of the first surface 101 11 The radius of curvature R of the second surface 102 is 36.3920 mm. 12 If it is 30.8350mm, then R 11 / R 12 The value is 1.197, satisfying the condition 0 < R mentioned earlier. 11 / R 12 The condition is ≤2. The radius of curvature R of the third surface 201. 21 The radius of curvature R of the fourth surface 202 is 18.2240 mm. 22 If it is 6.5292mm, then R 21 / R 22 The value is 2.77, which satisfies the condition 0 < R mentioned earlier. 21 / R 22 The condition is ≤5. The radius of curvature R of the fifth surface 301. 31 The radius of curvature R of the sixth surface 302 is 18.2240 mm. 32 If it is 6.0770mm, then R 31 / R 32 The value is 3.00, satisfying the condition 0 < R mentioned above. 31 / R 32 ≤5 conditions.

[0112] The first lens 10 has a refractive index of 1.5855 and an Abbe number of 29.909. The second lens 20 and the third lens 30 both have a refractive index Vd of 1.883 and an Abbe number of 40.847, satisfying the condition 1.4≤Vd≤2.0 mentioned above.

[0113] In this example, the field of view of the camera module is 190°. The distance T0 between the first lens 10 and the second lens 20 is 25mm, meaning T0 satisfies the condition 5mm < T0 < 50mm mentioned earlier. The system focal length F1 of the shooting device in the first usage state is 1.241mm, and the system focal length F2 of the shooting device in the second usage state is 0.9376mm. The value of F2 / F1 is 1.32, satisfying the condition 1 < F2 / F1 < 2 mentioned earlier.

[0114] The focal length f1 of the first lens 10 is -385mm, satisfying the condition -3000mm≤f1≤-100mm mentioned earlier. The focal length f2 of the second lens is -12.439mm, and the focal length f3 of the third lens is -11.00mm. Both of these values ​​are within the range of -50mm to -2mm, and the value of |f2| - |f3| is 1.439, satisfying the condition 0 < |f2| - |f3| < 3mm mentioned earlier.

[0115] In summary, in this example, all parameters of the camera module meet the corresponding conditions, and the camera module can achieve better imaging results, thus satisfying the design requirements of the camera module.

[0116] Combination Figures 17-18 As shown in the figure, in this example, the optical transfer function curve of the imaging device in its first operating state is as follows: Figure 17 As shown, the optical transfer function curve of the imaging device in its second operating state is as follows: Figure 18 As shown, comparison Figure 17 and Figure 18 It can be concluded that the camera module in this example has good imaging effect in both the first and second use states, and the imaging effect in the first use state can reach the same level as that in the second use state. The imaging of the shooting device is less affected by the refractive index of the medium, which greatly improves the imaging of the shooting device and enhances the user experience.

[0117] According to an exemplary embodiment, this application provides a shooting device, which may be, for example, an electronic device with shooting function such as a camera or a mobile phone. The shooting device includes, as described in the above embodiments, Figures 1-8 The detachable lens shown is also known as the second lens 20.

[0118] The detachable lens is used in the camera module of the shooting device. The shooting device has a first usage state and a second usage state, in which the refractive index of the medium is different. For example, the first usage state can be an underwater state with water as the medium, while the second usage state can be an above-water state with air as the medium. When the shooting device is in the first usage state, it cooperates with a protective shell, which is provided with a first lens 10. The protective shell allows the first lens 10 to be detachably connected to the shooting device. The camera module includes a first lens group 21 and a third lens 30. The detachable lens is detachably connected to the first lens group 21, and the third lens 30 is detachably connected to the first lens group 21. When the shooting device is in the first usage state, the first lens 10, the detachable lens, and the first lens group 21 are arranged sequentially along the direction from the object to the imaging surface 42; when the shooting device is in the second usage state, the third lens 30 and the first lens group 21 are arranged sequentially along the direction from the object to the imaging surface 32.

[0119] In some embodiments, the shooting device is configured as a panoramic camera. The panoramic camera includes at least two camera modules as described in the above embodiments and at least two detachable lenses as described in the above embodiments, wherein the at least two detachable lenses enable the at least two camera modules to jointly achieve panoramic imaging.

[0120] Each detachable lens is associated with a camera module, and each camera module can be associated with a first lens 10. Multiple first lenses 10 are mounted on the same protective housing. Since the field of view of the camera module is greater than 180°, for example, 190° for each camera module, panoramic imaging can be achieved by setting at least two opposing camera modules and their corresponding detachable lenses. Of course, it is understood that, in order to improve image clarity and imaging reliability, those skilled in the art can also set more camera modules according to design needs. This application does not impose too many restrictions on the number and placement of camera modules (i.e., the number and placement of detachable lenses).

[0121] In some embodiments, the imaging device can switch between a first usage state and a second usage state by removing and installing the protective housing and replacing the detachable lens, or by removing and installing the protective housing and replacing the lens group containing the detachable lens.

[0122] In one example, the camera module includes a third lens 30 and a first lens group 21. The detachable lens is detachably connected to the first lens group 21, and the third lens 30 is detachably connected to the first lens group 21. The shooting device has a first usage state and a second usage state. In the first usage state, the shooting device cooperates with the protective shell, and the camera module includes a first lens 10, a detachable lens (second lens 20), and a first lens group 21 arranged sequentially along the direction from the object to the imaging surface 42. In the second usage state, the protective shell is removed, and the camera module includes the third lens 30 and the first lens group 21 arranged sequentially along the direction from the object to the imaging surface 42. In this embodiment, the detachable lens is replaced separately, improving the flexibility and convenience of lens replacement and reducing the user's accessory replacement cost.

[0123] In another example, the camera module includes a first lens group and a second lens group. Both the first and second lens groups are detachably connected to the shooting device. In a first usage state, the shooting device cooperates with the protective shell, and the camera module includes a first lens 10 and a first lens group arranged sequentially along the direction from the object to the imaging surface 42. The first lens group includes a detachable lens (second lens 20) and a first lens group 21. In a second usage state, the protective shell is removed, and the camera module includes the second lens group, which includes a third lens 30 and a second lens group arranged sequentially along the direction from the object to the imaging surface 42. The second lens group may be the same as or at least partially different from the first lens group 21. Those skilled in the art can adjust it according to design needs, and this application embodiment does not impose excessive limitations on this. In this application embodiment, the first and second lens groups are replaced as a whole, eliminating the need to separately disassemble and install specific lenses in the first lens group. This reduces the risk of wear or scratches when disassembling and installing individual lenses, improving the stability and safety of the shooting device.

[0124] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0125] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited by the appended claims.

Claims

1. A detachable lens, applied to a shooting device, the shooting device comprising a camera module, characterized in that, The shooting device has a first use state and a second use state. In the first use state, the shooting device cooperates with the protective shell, and the protective shell is provided with a first lens. The camera module includes a first lens group and a third lens. The detachable lens is detachably connected to the first lens group, and the third lens is detachably connected to the first lens group. In the first usage state, the first lens, the detachable lens, and the first lens group are arranged sequentially along the direction from the object to the imaging surface; In the second usage state, the third lens and the first lens group are arranged sequentially along the direction from the object being photographed to the imaging surface.

2. The detachable lens according to claim 1, characterized in that, The camera module is a wide-angle camera module with a field of view ≥180°.

3. The detachable lens according to claim 1, characterized in that, The first lens and the detachable lens have negative optical power, and the focal length of the detachable lens ranges from -50mm to -2mm.

4. The detachable lens according to claim 1, characterized in that, The system focal length of the shooting device in the first usage state and the system focal length of the shooting device in the second usage state satisfy the following conditions: 1 < F2 / F1 < 2; Wherein, F1 is the system focal length of the shooting device in the first usage state, and F2 is the system focal length of the shooting device in the second usage state.

5. The detachable lens according to claim 1, characterized in that, The core thickness of the detachable lens, the core thickness of the third lens, the air gap between the detachable lens and the first lens group, and the air gap between the third lens and the first lens group satisfy the following conditions: -0.5≤|CT2+H2|-|CT3+H3|≤0.5; Wherein, CT2 is the core thickness of the detachable lens, CT3 is the core thickness of the third lens, H2 is the air gap between the detachable lens and the first lens group, and H3 is the air gap between the third lens and the first lens group.

6. The detachable lens according to claim 1, characterized in that, The height of the detachable lens at its maximum effective aperture and the height of the third lens at its maximum effective aperture satisfy the following conditions: -0.02≤|SG3|-|SG2|≤0.02; Wherein, SG2 is the height of the detachable lens at its maximum effective aperture, and SG3 is the height of the third lens at its maximum effective aperture.

7. The detachable lens according to claim 1, characterized in that, The focal length of the third lens ranges from -50mm to -2mm, and the focal length of the detachable lens and the focal length of the third lens satisfy the following conditions: 0<∣f2∣-∣f3∣<3mm; Where f2 is the focal length of the detachable lens and f3 is the focal length of the third lens.

8. The detachable lens according to claim 1, characterized in that, The effective light-transmitting aperture of the first lens on the side closer to the subject and the effective light-transmitting aperture of the detachable lens on the side closer to the subject satisfy the following conditions: 1 < CA1 / CA2 < 10; The effective light-transmitting aperture of the first lens on the side closer to the subject and the effective light-transmitting aperture of the third lens on the side closer to the subject satisfy the following conditions: 1 < CA1 / CA3 < 10; Wherein, CA1 is the effective light-transmitting aperture of the first lens on the side closest to the subject, CA2 is the effective light-transmitting aperture of the detachable lens on the side closest to the subject, and CA3 is the effective light-transmitting aperture of the third lens on the side closest to the subject.

9. The detachable lens according to claim 1, characterized in that, The first lens has a first surface near the object being photographed and a second surface near the imaging surface, and the radii of curvature of the first surface and the second surface satisfy the following condition: 0<R 11 / R 12 ≤2; Among them, R 11 R is the radius of curvature of the first surface. 12 Let be the radius of curvature of the second surface.

10. The detachable lens according to claim 1, characterized in that, The detachable lens has a third surface near the subject and a fourth surface near the imaging surface, and the third lens has a fifth surface near the subject and a sixth surface near the imaging surface. The radius of curvature of the third surface and the radius of curvature of the fourth surface satisfy the following condition: 0<R 21 / R 22 ≤5; The radius of curvature of the fifth surface and the radius of curvature of the sixth surface satisfy the following condition: 0<R 31 / R 32 ≤5; Among them, R 21 R is the radius of curvature of the third surface. 22 R is the radius of curvature of the fourth surface. 31 R is the radius of curvature of the fifth surface. 32 Let be the radius of curvature of the sixth surface.

11. The detachable lens according to claim 1, characterized in that, The focal length f1 of the first lens satisfies the following condition: -3000mm≤f1≤-100mm.

12. The detachable lens according to claim 1, characterized in that, The distance T0 between the first lens and the detachable lens satisfies the following condition: 5mm < T0 < 50mm.

13. The detachable lens according to claim 1, characterized in that, The refractive index Vd of the detachable lens satisfies the following condition: 1.4≤Vd≤2.

0.

14. A shooting device, characterized in that, Includes the detachable lens as described in any one of claims 1 to 12.

15. The imaging device according to claim 14, characterized in that, The shooting device is configured as a panoramic camera, which includes at least two camera modules and at least two detachable lenses, with the at least two detachable lenses working together with the at least two camera modules to achieve panoramic imaging.

16. The shooting device according to claim 15, characterized in that, The camera module further includes a third lens and a first lens group. The detachable lens is detachably connected to the first lens group, and the third lens is detachably connected to the first lens group. The shooting device has a first usage state and a second usage state. In the first usage state, the camera module includes a first lens, a detachable lens, and a first lens group arranged sequentially along the direction from the object being photographed to the imaging surface; In the second usage state, the camera module includes the third lens and the first lens group arranged sequentially along the direction from the object being photographed to the imaging surface.

Images