Zoom lens and camera

Abstract

The embodiment of the present application provides a zoom lens and a camera, comprising: an optical path folding component, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding component; light emitted from the first lens group enters the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis; the second lens group can move between a first position and a second position, the first position is located on the optical path through which the outgoing light passes, and the second position is located between the first position and the first lens group and is not on the optical path of the outgoing light; the focal lengths FMIN and FMAX of the zoom lens, FMAX / FMIN>1.3. After the zoom lens provided by the present application is set in a smart device such as a mobile phone or a tablet computer, the smart device can clearly capture close and far-distance scenes without having a great impact on the thickness of the smart device body.

Description

Technical Field

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

[0002] Nowadays, more and more users use cameras of smart devices such as mobile phones and tablets to take pictures of scenery. Therefore, the cameras of these smart devices need to be able to clearly capture close and distant scenes like professional cameras (such as SLR cameras).

[0003] Professional cameras can clearly capture both near and far objects because they are equipped with zoom lenses with high zoom ratios. These zoom lenses have multiple lenses arranged in sequence along the optical axis, and at least one of the lenses can be moved along the optical axis (hereinafter referred to as a movable lens). By moving these movable lenses along the optical axis, high zoom ratio zooming can be achieved.

[0004] However, in order for the movable lens to move normally along the optical axis, sufficient space needs to be reserved for the movable lens in the direction along the optical axis, so that the length of these zoom lenses along the optical axis is relatively long. For smart devices such as mobile phones and tablet computers, the optical axis of the camera is often perpendicular to the body of the smart device. Therefore, if these zoom lenses are set on the smart device, the body thickness of the smart device will be too large. Summary of the invention

[0005] In view of this, the present application provides a zoom lens and a camera, which reduce the impact of the zoom lens on the thickness of the smart device body while the smart device can clearly capture close and long-distance scenes.

[0006] In a first aspect of the present application, a zoom lens is provided, comprising: an optical path folding member, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding member;

[0007] The light emitted from the first lens group is incident on the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis;

[0008] The second lens group is movable between a first position and a second position, the first position is located on the optical path of the outgoing light, and the second position is located between the first position and the first lens group and is not on the optical path of the outgoing light;

[0009] When the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3.

[0010] The zoom lens provided by the embodiment of the present application comprises: an optical path folding component, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding component; light emitted from the first lens group enters the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis; the second lens group can move between a first position and a second position, wherein the first position is located on the optical path through which the outgoing light passes, and the second position is located between the first position and the first lens group, and is not on the optical path of the outgoing light; when the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3. Zooming is achieved by moving the second lens group between the first position and the second position, thereby satisfying different shooting requirements, and since the second lens group moves between the first position and the second position, the length of the zoom lens in the direction of the first optical axis will not be increased, and at the same time, the optical path is folded by using the optical path folding component, thereby controlling the length of the zoom lens in the direction of the first optical axis to a certain extent. Therefore, after the zoom lens provided by the present application is set on a smart device such as a mobile phone or a tablet computer, the smart device can clearly capture close and distant scenes with little impact on the thickness of the smart device body.

[0011] In a possible implementation, the focal length of the first lens group is f1, and the focal length of the second lens group is f2, satisfying: -3.0< f1 / f2 < -1.3.

[0012] When -3.0< f1 / f2 < -1.3 is satisfied, the first lens group and the second lens group can cooperate with each other to correct aberrations such as spherical aberration and improve imaging quality.

[0013] In a possible implementation, the maximum distance from the surface where light first enters the zoom lens to a surface of the optical path folding member away from the first lens group on the first optical axis is H, the maximum distance between the first lens group and the second lens group in a direction perpendicular to the first optical axis is L, and the following conditions are satisfied: H / L< 0.45, 1.8 < f1 / H <3.0.

[0014] When H / L < 0.45 is satisfied, it is beneficial to control the size of the zoom lens and easy to miniaturize the zoom lens. When 1.8 < f1 / H < 3.0 is satisfied, it is beneficial to adjust the ratio of the focal length of the first lens group to the length of the zoom lens in the optical axis direction, which helps to compress the thickness of the zoom lens.

[0015] In a possible implementation manner, the optical path folding member is a prism. The optical path folding member sequentially includes a first transmission surface and a first reflection surface along the optical path direction. The included angle between the first transmission surface and the first reflection surface is θ, satisfying: 20° < θ < 40°.

[0016] When 20° < θ < 40° is satisfied, it can avoid the prism being unable to generate total reflection due to too small an included angle, and also avoid increasing the volume of the zoom lens due to too large an included angle.

[0017] In a possible implementation manner, the optical path folding member sequentially includes a first transmission surface, a first reflection surface, a second reflection surface, a third reflection surface, a fourth reflection surface, a fifth reflection surface, and a second transmission surface along the optical path direction; wherein, the first transmission surface, the second reflection surface, the fourth reflection surface, and the second transmission surface are the same interface.

[0018] In the embodiments of the present application, when light enters the optical path folding member, multiple reflections will occur, realizing the folding of the optical path.

[0019] In a possible implementation manner, the height of the first lens group on the first optical axis is H1, and the height of the optical path folding member on the first optical axis is H2, satisfying: H1 / H < 0.6, H2 / L < 0.3.

[0020] When H1 / H < 0.6 is satisfied, while reducing the height of the zoom lens, enough space is left for lens arrangement to ensure the imaging quality of the system. When H2 / L < 0.3 is satisfied, it helps to control the shape of the zoom lens and meet the requirements of miniaturization.

[0021] In a possible implementation manner, the curvature radius of the incident light surface of the first lens is R11, and the curvature radius of the outgoing light surface of the first lens is R12, satisfying: -2.0 < R11 / R12 < 0.8, and the first lens is the first lens included along the optical path direction.

[0022] When -2.0 < R11 / R12 < 0.8 is satisfied, it is beneficial to adjust the surface shape of the first lens and strengthen the optical path control ability of the incident light surface of the first lens.

[0023] In a possible implementation, the radius of curvature of the second lens on the light incident surface is R21, the radius of curvature of the second lens on the light exiting surface is R22, and the central thickness of the second lens is CT2, satisfying: 0 < R21 / R22 × CT2 < 2.0, and the second lens is the second lens included along the optical path.

[0024] When satisfying: 0 < R21 / R22 × CT2 < 2.0, the shape of the second lens can be effectively controlled, enabling the light passing through the first lens to transition well to the subsequent lens group, correcting the aberration introduced by the first lens, and improving the imaging quality.

[0025] In a possible implementation, the maximum refractive index of the lenses in the first lens group and the second lens group is Ndmax, and the minimum refractive index of the lenses in the first lens group and the second lens group is Ndmin, satisfying: Ndmax - Ndmin > 0.13.

[0026] When satisfying: Ndmax - Ndmin > 0.13, by reasonably controlling the distribution of the lens materials in the zoom lens, it helps to compress the volume of the zoom lens, and at the same time is beneficial to the correction of aberration and the improvement of imaging quality.

[0027] In a possible implementation, the central thickness of the third lens is CT3, and the central thickness of the first lens in the direction from the image side to the object side is CTL, satisfying: 0 < (CT2 + CT3) / CTL < 3.5, and the third lens is the third lens included along the optical path.

[0028] When satisfying: 0 < (CT2 + CT3) / CTL < 3.5, by matching the central thickness of the second lens, the central thickness of the third lens, and the central thickness of the last lens, it is beneficial to effectively reduce the thickness sensitivity of the zoom lens and is beneficial to correcting the chromatic aberration of the zoom lens.

[0029] In a possible implementation, when the second lens group is in the first position, the aperture value of the zoom lens is FNO1, satisfying: 2.0 < FNO1 < 3.0.

[0030] In the embodiments of the present application, a balance can be achieved between the light intensity and the depth of field, the light input amount can be enhanced to improve the image quality, and vignetting around the image can be avoided.

[0031] In a second aspect, the embodiments of the present application further provide a camera, including the zoom lens described in the first aspect above.

[0032] The zoom lens provided by the embodiment of the present application comprises: an optical path folding component, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding component; light emitted from the first lens group enters the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis; the second lens group can move between a first position and a second position, wherein the first position is located on the optical path through which the outgoing light passes, and the second position is located between the first position and the first lens group, and is not on the optical path of the outgoing light; when the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3. Zooming is achieved by moving the second lens group between the first position and the second position, thereby satisfying different shooting requirements, and since the second lens group moves between the first position and the second position, the length of the zoom lens in the direction of the first optical axis will not be increased, and at the same time, the optical path is folded by using the optical path folding component, thereby controlling the length of the zoom lens in the direction of the first optical axis to a certain extent. Therefore, after the zoom lens provided by the present application is set on a smart device such as a mobile phone or a tablet computer, the smart device can clearly capture close and distant scenes with little impact on the thickness of the smart device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 A schematic diagram of a first structure of a zoom lens provided in an embodiment of the present application;

[0035] Figure 2 A second structural schematic diagram of a zoom lens provided in an embodiment of the present application;

[0036] Figure 3a The first zoom lens provided in the embodiment of the present application;

[0037] Figure 3b are the astigmatism curve, field curvature and distortion curve of the first zoom lens at the first position;

[0038] Figure 3c are the astigmatism curve, field curvature and distortion curve of the first zoom lens at the second position;

[0039] Figure 4aA second zoom lens provided in an embodiment of the present application;

[0040] Figure 4b are the astigmatism curve, field curvature, and distortion curve of the second zoom lens at the first position;

[0041] Figure 4c are the astigmatism curve, field curvature, and distortion curve of the second zoom lens at the second position;

[0042] Figure 5a A third zoom lens provided in an embodiment of the present application;

[0043] Figure 5b Astigmatism curve, field curvature and distortion curve of the third zoom lens at the first position;

[0044] Figure 5c Astigmatism curve, field curvature and distortion curve of the third zoom lens at the second position;

[0045] Figure 6a A fourth zoom lens provided in an embodiment of the present application;

[0046] Figure 6b are the astigmatism curve, field curvature and distortion curve of the fourth zoom lens at the first position;

[0047] Figure 6c Astigmatism curve, field curvature and distortion curve of the fourth zoom lens at the second position;

[0048] Figure 7a A fifth zoom lens provided in an embodiment of the present application;

[0049] Figure 7b are the astigmatism curve, field curvature and distortion curve of the fifth zoom lens at the first position;

[0050] Figure 7c are the astigmatism curve, field curvature and distortion curve of the fifth zoom lens at the second position;

[0051] Figure 8a A sixth zoom lens provided in an embodiment of the present application;

[0052] Figure 8b are the astigmatism curve, field curvature and distortion curve of the sixth zoom lens at the first position;

[0053] Figure 8c are the astigmatism curve, field curvature and distortion curve of the sixth zoom lens at the second position;

[0054] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0055] Description of reference numerals:

[0056] First lens group 110; first lens 111; second lens 112; third lens 113; second lens group 120; fourth lens 121; fifth lens 122; optical path folding member 130; incident area 140; exit area 150; incident surface P1; exit surface P2. DETAILED DESCRIPTION

[0057] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0058] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0059] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0060] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] like Figure 1 As shown, the embodiment of the present application provides a zoom lens, comprising: an optical path folding member 130, a first lens group 110, and a second lens group 120, wherein the first lens group 110 and the second lens group 120 are located on the same side of the optical path folding member 130;

[0062] The first lens group 110 may include three lenses, namely a first lens 111 , a second lens 112 , and a third lens 113 ; the second lens group 120 may include two lenses, namely a fourth lens 121 and a fifth lens 122 .

[0063] The light emitted from the first lens group is incident on the light path folding component along the first optical axis to form an emergent light; the light is reflected multiple times in the light path folding component, and the first lens group is located on the first optical axis.

[0064] The side of the optical path folding member 130 facing the first direction includes an incident area 140 and an exit area 150, and the interval between the incident area 140 and the exit area 150 is greater than the projection length of the second lens group 120 in the second direction, the first direction is the direction from the optical path folding member 130 to the first lens group 110, and the second direction is the direction from the incident area 140 to the exit area 150.

[0065] The incident area 140 is an incident surface P1 on the side facing the outside of the optical path folding member 130, and the exit area 150 is an exit surface P2 on the side facing the inside of the optical path folding member 130. The interval between the incident area 140 and the exit area 150 is greater than the projection length of the second lens group 120 in the second direction.

[0066] The light path folding member 130 is used to propagate the light incident from the incident area 140 to the exit area 150, so that the light is emitted from the exit area 150 along the first direction to form exit light;

[0067] The second lens group 120 is movable between a first position and a second position, wherein the first position is located on the optical path of the emitted light, and the second position is located between the first position and the first lens group and is not on the optical path of the emitted light;

[0068] When the second lens group 120 is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group 120 is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3.

[0069] The zoom lens provided by the embodiment of the present application comprises: an optical path folding component, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding component; light emitted from the first lens group enters the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis; the second lens group can move between a first position and a second position, wherein the first position is located on the optical path through which the outgoing light passes, and the second position is located between the first position and the first lens group, and is not on the optical path of the outgoing light; when the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3. Zooming is achieved by moving the second lens group between the first position and the second position, thereby satisfying different shooting requirements, and since the second lens group moves between the first position and the second position, the length of the zoom lens in the direction of the first optical axis will not be increased, and at the same time, the optical path is folded by using the optical path folding component, thereby controlling the length of the zoom lens in the direction of the first optical axis to a certain extent. Therefore, after the zoom lens provided by the present application is set on a smart device such as a mobile phone or a tablet computer, the smart device can clearly capture close and distant scenes with little impact on the thickness of the smart device body.

[0070] In an example, the focal length of the first lens group 110 is f1, and the focal length of the second lens group 120 is f2, satisfying: -3.0< f1 / f2 < -1.3.

[0071] When -3.0< f1 / f2 < -1.3 is satisfied, the first lens group and the second lens group can cooperate with each other to correct aberrations such as spherical aberration and improve imaging quality.

[0072] For an example, see Figure 2 The maximum value of the distance from the surface where light first enters the zoom lens to the side of the optical path folding member 130 away from the first lens group 110 on the first optical axis is H, and the maximum value of the distance between the first lens group 110 and the second lens group 120 in the direction perpendicular to the first optical axis is L, satisfying: H / L< 0.45, 1.8< f1 / H < 3.0.

[0073] When H / L < 0.45 is satisfied, it is beneficial to control the size of the zoom lens and facilitate miniaturization of the zoom lens. When 1.8 < f1 / H < 3.0 is satisfied, it is beneficial to adjust the ratio of the focal length of the first lens group to the length of the zoom lens in the optical axis direction, which helps to reduce the thickness of the zoom lens.

[0074] In one example, the optical path folding member 130 is a prism. The optical path folding member 130 sequentially includes a first transmission surface and a first reflection surface along the direction of the optical path. The included angle between the first transmission surface and the first reflection surface is θ, satisfying: 20° < θ < 40°.

[0075] When 20° < θ < 40° is satisfied, it can avoid the prism being unable to generate total reflection due to too small an included angle, and also avoid increasing the volume of the zoom lens due to too large an included angle.

[0076] In one example, the optical path folding member 130 sequentially includes a first transmission surface, a first reflection surface, a second reflection surface, a third reflection surface, a fourth reflection surface, a fifth reflection surface, and a second transmission surface along the direction of the optical path; wherein, the first transmission surface, the second reflection surface, the fourth reflection surface, and the second transmission surface are the same interface.

[0077] When the light passes through the incident surface P1, it can pass through the incident surface P1 and then undergo multiple reflections. The reflections of the light on the second reflection surface, the third reflection surface, and the fourth reflection surface are realized by relying on the total reflection law. Only the first reflection surface and the fifth reflection surface are the real reflection surfaces, and finally it exits from the exit surface P2. In the embodiment of the present application, when the light enters the optical path folding member, it will undergo multiple reflections, realizing the folding of the optical path.

[0078] In one example, the height of the first lens group on the first optical axis is H1, and the height of the optical path folding member on the first optical axis is H2, satisfying: H1 / H < 0.6, H2 / L < 0.3.

[0079] When H1 / H < 0.6 is satisfied, while reducing the height of the zoom lens, it leaves enough space for the lens arrangement to ensure the imaging quality of the system. When H2 / L < 0.3 is satisfied, it helps to control the shape of the zoom lens to meet the requirements of miniaturization.

[0080] In one example, the radius of curvature of the incident light surface of the first lens is R11, and the radius of curvature of the outgoing light surface of the first lens is R12, satisfying: -2.0 < R11 / R12 < 0.8. The first lens is the first lens included along the direction of the optical path.

[0081] When -2.0 < R11 / R12 < 0.8 is satisfied, it is beneficial to adjust the surface shape of the first lens and strengthen the optical path control ability of the incident light surface of the first lens.

[0082] In one example, the radius of curvature of the incident light surface of the second lens is R21, the radius of curvature of the outgoing light surface of the second lens is R22, and the central thickness of the second lens is CT2, satisfying: 0 < R21 / R22 × CT2 < 2.0. The second lens is the second lens included along the direction of the optical path.

[0083] Satisfy: when 0 < R21 / R22×CT2 < 2.0, the shape of the second lens can be effectively controlled, enabling the light passing through the first lens to be well transitioned to the subsequent lens groups, correcting the aberration introduced by the first lens, and improving the imaging quality.

[0084] In one example, the maximum refractive index of the lenses in the first lens group and the second lens group is Ndmax, and the minimum refractive index of the lenses in the first lens group and the second lens group is Ndmin, satisfying: Ndmax - Ndmin > 0.13.

[0085] Satisfy: when Ndmax - Ndmin > 0.13, by reasonably controlling the distribution of the lens materials in the zoom lens, it helps to compress the volume of the zoom lens, and at the same time is beneficial to the correction of aberration and the improvement of imaging quality.

[0086] In one example, the central thickness of the third lens is CT3, and the central thickness of the first lens in the direction from the image side to the object side is CTL, satisfying: 0 < (CT2 + CT3) / CTL < 3.5, and the third lens is the third lens included along the optical path.

[0087] To ensure the imaging quality, usually, the first lens group includes at least two lenses. When the first lens group includes two lenses, the third lens is the lens closest to the optical path folding member in the second lens group. The second lens group includes at least one lens. When the second lens group includes one lens, the last lens is the third lens.

[0088] Satisfy: when 0 < (CT2 + CT3) / CTL < 3.5, by matching the central thickness of the second lens, the central thickness of the third lens, and the central thickness of the last lens, it is beneficial to effectively reduce the thickness sensitivity of the zoom lens and is beneficial to correcting the chromatic aberration of the zoom lens.

[0089] In one example, when the second lens group is in the first position, the aperture value of the zoom lens is FNO1, satisfying: 2.0 < FNO1 < 3.0.

[0090] In the embodiments of the present application, a balance can be achieved between the light intensity and the depth of field, the light input amount is enhanced to improve the image quality, and vignetting at the periphery of the image is avoided.

[0091] See Figure 3a, is the first zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 1, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0092] In Table 1, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 8 represents the eighth surface where the light is refracted, and surface number 9 represents the ninth surface where the light is reflected. The refractive index of the first lens is 1.74, the Abbe number is 40.92, and the focal length is 14.32; a lens focal length greater than 0 indicates that the lens has a positive focal length, and a lens focal length less than 0 indicates that the lens has a negative focal length. The combined focal length of the first lens, the second lens, and the third lens is 25.8. Table 1 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength in the following text. Table 2 is the radial coordinate coefficients of the aspheric surface in Table 1.

[0093] Table 1 Parameters of each lens

[0094]

[0095] Table 2 Aspheric parameters

[0096]

[0097] A4, A6, A8…A20 are radial coordinate coefficients.

[0098] Figure 3b and Figure 3c To adopt Figure 3a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 3b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 3cIt is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. Among them, Z represents the astigmatism curve of the light with a wavelength of 435nm, Y represents the astigmatism curve of the light with a wavelength of 555nm, and X represents the astigmatism curve of the light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridian direction of the light with a wavelength of 650nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, Y1 represents the curve in the meridian direction of the light with a wavelength of 555nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, Z1 represents the curve in the meridian direction of the light with a wavelength of 435nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, and Y3 represents the distortion curve of the light with a wavelength of 555nm.

[0099] See also Figure 4a , is the second zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 3, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0100] In Table 3, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 8 represents the eighth surface where the light is refracted, and surface number 9 represents the ninth surface where the light is reflected. The refractive index of the first lens is 1.76, the Abbe number is 43.31, and the focal length is 16.11; a lens focal length greater than 0 indicates that the lens has a positive focal length, and a lens focal length less than 0 indicates that the lens has a negative focal length. The combined focal length of the first lens, the second lens, and the third lens is 30.00. Table 3 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength hereinafter. Table 4 is the radial coordinate coefficients of the aspheric surface in Table 3.

[0101] Table 3 Parameters of each lens

[0102]

[0103] Table 4 Aspheric parameters

[0104]

[0105] Figure 4b and Figure 4c To adopt Figure 4a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 4b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 4c It is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. Among them, Z represents the astigmatism curve of the light with a wavelength of 435nm, Y represents the astigmatism curve of the light with a wavelength of 555nm, and X represents the astigmatism curve of the light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridian direction of the light with a wavelength of 650nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, Y1 represents the curve in the meridian direction of the light with a wavelength of 555nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, Z1 represents the curve in the meridian direction of the light with a wavelength of 435nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, and Y3 represents the distortion curve of the light with a wavelength of 555nm.

[0106] See also Figure 5a , which is the third zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 5, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0107] In Table 5, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 8 represents the eighth surface where the light is refracted, and surface number 9 represents the ninth surface where the light is reflected. The refractive index of the first lens is 1.76, the Abbe number is 43.38, and the focal length is 16.1; a lens focal length greater than 0 indicates that the lens has a positive focal length, and a lens focal length less than 0 indicates that the lens has a negative focal length. The combined focal length of the first lens, the second lens, and the third lens is 30.00. Table 5 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength hereinafter. Table 6 is the radial coordinate coefficients of the aspheric surface in Table 5.

[0108] Table 5 Parameters of each lens

[0109]

[0110] Table 6 Aspheric parameters

[0111]

[0112] Figure 5b and Figure 5c To adopt Figure 5a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 5b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 5c It is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. Among them, Z represents the astigmatism curve of the light with a wavelength of 435nm, Y represents the astigmatism curve of the light with a wavelength of 555nm, and X represents the astigmatism curve of the light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridian direction of the light with a wavelength of 650nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, Y1 represents the curve in the meridian direction of the light with a wavelength of 555nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, Z1 represents the curve in the meridian direction of the light with a wavelength of 435nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, and Y3 represents the distortion curve of the light with a wavelength of 555nm.

[0113] See also Figure 6a , which is the fourth zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 7, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0114] In Table 7, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 8 represents the eighth surface where the light is refracted, and surface number 9 represents the ninth surface where the light is reflected. The refractive index of the first lens is 1.74, the Abbe number is 44.85, and the focal length is 16.14; a lens focal length greater than 0 indicates that the lens has a positive focal length, and a lens focal length less than 0 indicates that the lens has a negative focal length. The combined focal length of the first lens, the second lens, and the third lens is 30.00. Table 7 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength hereinafter. Table 8 is the radial coordinate coefficients of the aspheric surface in Table 7.

[0115] Table 7 Parameters of each lens

[0116]

[0117] Table 8 Aspheric parameters

[0118]

[0119] Figure 6b and Figure 6c To adopt Figure 6a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 6b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 6c It is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. Among them, Z represents the astigmatism curve of the light with a wavelength of 435nm, Y represents the astigmatism curve of the light with a wavelength of 555nm, and X represents the astigmatism curve of the light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridian direction of the light with a wavelength of 650nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, Y1 represents the curve in the meridian direction of the light with a wavelength of 555nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, Z1 represents the curve in the meridian direction of the light with a wavelength of 435nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, and Y3 represents the distortion curve of the light with a wavelength of 555nm.

[0120] See also Figure 7a, which is the fifth zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 9, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0121] In Table 9, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 8 represents the eighth surface where the light is refracted, and surface number 9 represents the ninth surface where the light is reflected. The refractive index of the first lens is 1.76, the Abbe number is 41.22, and the focal length is 15.49; a lens focal length greater than 0 indicates that the optical power of the lens is positive, and a lens focal length less than 0 indicates that the optical power of the lens is negative. The combined focal length of the first lens, the second lens, and the third lens is 30.00. Table 9 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength hereinafter. Table 10 is the radial coordinate coefficients of the aspheric surface in Table 9.

[0122] Table 9 Parameters of each lens

[0123]

[0124] Table 10 Aspheric parameters

[0125]

[0126] Figure 7b and Figure 7c To adopt Figure 7a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 7b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 7cIt is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. Among them, Z represents the astigmatism curve of the light with a wavelength of 435nm, Y represents the astigmatism curve of the light with a wavelength of 555nm, and X represents the astigmatism curve of the light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridian direction of the light with a wavelength of 650nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, Y1 represents the curve in the meridian direction of the light with a wavelength of 555nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, Z1 represents the curve in the meridian direction of the light with a wavelength of 435nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, and Y3 represents the distortion curve of the light with a wavelength of 555nm.

[0127] See also Figure 8a , which is the sixth zoom lens provided in the embodiment of the present application. The parameters of each lens are shown in Table 11, where FMIN is the minimum focal length of the zoom lens, FMAX is the maximum focal length of the zoom lens, HFOV1 is the field of view of the zoom lens when the second lens group is in the first position, HFOV2 is the field of view of the zoom lens when the second lens group is in the second position, and FNO2 is the aperture value of the zoom lens when the second lens group is in the second position.

[0128] In Table 11, surface numbers 0, 1, 2... represent the order of the surfaces where the light is refracted / reflected. For example, surface number 2 represents the second surface where the light is refracted (i.e., the light incident surface of the first lens is the second surface where the light is refracted), surface number 3 represents the third surface where the light is refracted (i.e., the light exit surface of the first lens is the third surface where the light is refracted), surface number 10 represents the tenth surface where the light is refracted, and surface number 11 represents the eleventh surface where the light is reflected. The refractive index of the first lens is 1.74, the Abbe number is 44.88, and the focal length is -103.42; a lens focal length greater than 0 indicates that the optical power of the lens is positive, and a lens focal length less than 0 indicates that the optical power of the lens is negative. The combined focal length of the first lens, the second lens, and the third lens is 31.93. Table 11 is the data obtained when the wavelength of the light incident on the zoom lens is 555nm, so 555nm is referred to as the reference wavelength hereinafter. Table 12 is the radial coordinate coefficients of the aspheric surfaces in Table 11.

[0129] Table 11 Parameters of each lens

[0130]

[0131] Table 12 Aspheric parameters

[0132]

[0133] Figure 8b and Figure 8c To adopt Figure 8a Two result graphs of zoom lenses are provided. From left to right in each graph are: astigmatism curve, field curvature, distortion curve, among which, Figure 8b are the astigmatism curve, field curvature, and distortion curve of the zoom lens when the second lens group is in the first position; Figure 8c It is the astigmatism curve, field curvature and distortion curve of the zoom lens when the second lens group is in the second position. The lines of different colors in the figure represent different wavelengths. Purple represents light with a wavelength of 435nm, blue represents light with a wavelength of 470nm, cyan represents light with a wavelength of 510nm, green represents light with a wavelength of 555nm, brown represents light with a wavelength of 610nm, and red represents light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridian direction, and the solid line represents the curve in the sagittal direction. Among them, X represents the astigmatism curve of light with a wavelength of 435nm, Y represents the astigmatism curve of light with a wavelength of 470nm, Z represents the astigmatism curve of light with a wavelength of 510nm, U represents the astigmatism curve of light with a wavelength of 555nm, V represents the astigmatism curve of light with a wavelength of 610nm, and W represents the astigmatism curve of light with a wavelength of 650nm. In the field curvature, the dotted line represents the curve in the meridional direction, the solid line represents the curve in the sagittal direction, X1 represents the curve in the meridional direction of the light with a wavelength of 435nm, X2 represents the curve in the sagittal direction of the light with a wavelength of 435nm, Y1 represents the curve in the meridional direction of the light with a wavelength of 470nm, Y2 represents the curve in the sagittal direction of the light with a wavelength of 470nm, Z1 represents the curve in the meridional direction of the light with a wavelength of 510nm, Z2 represents the curve in the sagittal direction of the light with a wavelength of 510nm, U1 represents the curve in the meridional direction of the light with a wavelength of 555nm, U2 represents the curve in the sagittal direction of the light with a wavelength of 555nm, V1 represents the curve in the meridional direction of the light with a wavelength of 610nm, V2 represents the curve in the sagittal direction of the light with a wavelength of 610nm, W1 represents the curve in the meridional direction of the light with a wavelength of 650nm, W2 represents the curve in the sagittal direction of the light with a wavelength of 650nm, and U3 represents the distortion curve of the light with a wavelength of 555nm.

[0134] The surface shape x of each of the above-mentioned aspheric lenses can be defined by, but not limited to, the following aspheric formula.

[0135]

[0136] Among them, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R (R represents the Y radius, that is, the paraxial curvature c is the reciprocal of the Y radius in the above table); k is the cone coefficient; Ai is the correction coefficient of the i-th order aspherical surface, when i is 4, A4 is the radial coordinate coefficient A4 mentioned above, when i is 6, A6 is the radial coordinate coefficient A6 mentioned above, and so on.

[0137] In the above six embodiments, the values ​​of H1, H2, H, and L of the zoom lens are shown in Table 13:

[0138] Table 13

[0139]

[0140] In the above six embodiments, the ratio of the maximum focal length FMAX to the minimum focal length FMIN of each zoom lens, the ratio of the focal length f1 of the first lens group to the focal length f2 of the second lens group, the ratio of H to L of each zoom lens, the value of θ, the ratio of H1 to H of each zoom lens, the ratio of f1 to H of each zoom lens, the ratio of R11 to R12 of each zoom lens, the ratio of R21 to R22 and CT2 of each zoom lens, the ratio of CT2 and CT3 to CTL of each zoom lens, the value of FNO1 of each zoom lens, and the ratio of H2 to L of each zoom lens are as shown in Table 14:

[0141] Table 14

[0142]

[0143] Corresponding to the aforementioned zoom lens, an embodiment of the present application further provides a camera, wherein the camera has the zoom lens as described in the aforementioned first aspect.

[0144] The camera can be used independently or as a component on a smart device. When the camera is implemented as a component on a smart device, it can be applied to a fixed-focus smart device or a smart device with a small zoom range. For a fixed-focus smart device or a smart device with a small zoom range, the camera focal length can be changed without changing the size of its lens. When traditional smart devices achieve telephoto shooting, they often increase the lens size in the first direction, which will increase the thickness of the smart device. The zoom lens provided in the present application includes: an optical path folding component, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding component; light emitted from the first lens group enters the optical path folding component along the first optical axis to form an outgoing light; the light is reflected multiple times in the optical path folding component, and the first lens group is located on the first optical axis; the second lens group can move between a first position and a second position, the first position is located on the optical path through which the outgoing light passes, and the second position is located between the first position and the first lens group, and is not on the optical path of the outgoing light; when the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN>1.3. Zooming is achieved by moving the second lens group between the first position and the second position, which meets different shooting requirements. In addition, since the second lens group moves between the first position and the second position, the length of the zoom lens in the direction of the first optical axis will not be increased. At the same time, the optical path is folded by the optical path folding component, which also controls the length of the zoom lens in the direction of the first optical axis to a certain extent. Therefore, after the zoom lens provided by the present application is set in a smart device such as a mobile phone or a tablet computer, the smart device can clearly capture close and long-distance scenes without greatly affecting the thickness of the smart device body.

[0145] See also Fig. 9 , Fig. 9 The figure shows a schematic diagram of the hardware structure of a smart device including the camera provided in an embodiment of the present application. The electronic device may be a mobile phone, a tablet computer, or other user terminals.

[0146] The electronic device includes a processor 210, a transceiver 220, and a display unit 270. The display unit 270 may include a display screen.

[0147] Optionally, the electronic device may further include a memory 230. The processor 210, the transceiver 220 and the memory 230 may communicate with each other through an internal connection path to transmit control and / or data signals. The memory 230 is used to store a computer program, and the processor 210 is used to call and run the computer program from the memory 230.

[0148] Optionally, the electronic device may further include an antenna 240 for transmitting the wireless signal output by the transceiver 220 .

[0149] The processor 210 and the memory 230 may be combined into a processing device, or more commonly, they are independent components, and the processor 210 is used to execute the program code stored in the memory 230 to implement the above functions. In specific implementation, the memory 230 may also be integrated into the processor 210, or may be independent of the processor 210.

[0150] In addition, in order to make the functions of the electronic device more complete, the electronic device may also include one or more of an input unit 260, an audio circuit 280, a camera 290 and a sensor 201, and the audio circuit may also include a speaker 282, a microphone 284, and the like.

[0151] Optionally, the electronic device may further include a power supply 250 for providing power to various devices or circuits in the electronic device.

[0152] Understandably, Fig. 9 The operations and / or functions of each module in the electronic device shown are respectively for implementing the corresponding processes in the following method embodiments. For details, please refer to the description in the following method embodiments, and the detailed description is appropriately omitted here to avoid repetition.

[0153] Understandably, Fig. 9 The processor 210 in the electronic device shown may include one or more processing units, for example: the processor 210 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (imagesignalprocessor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural-network processing unit (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated in one or more processors. A memory can also be set in the processor 210 for storing instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. The memory can save instructions or data that the processor 210 has just used or circulated. If the processor 210 needs to use the instruction or data again, it can be directly called from the memory. Repeated access is avoided, the waiting time of the processor 210 is reduced, and the efficiency of the system is improved.

[0154] In some embodiments, the processor 210 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0155] It is understandable that the interface connection relationship between the modules illustrated in the embodiments of the present application is only a schematic illustration and does not constitute a structural limitation on the electronic device. In other embodiments of the present application, the electronic device may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0156] Understandably, Fig. 9 The power supply 250 shown is used to power the processor 210, the memory 230, the display unit 270, the camera 290, the input unit 260 and the transceiver 220. The antenna 240 is used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antenna. For example, the antenna 240 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0157] The transceiver 220 can provide wireless communication solutions for electronic devices, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc. The transceiver 220 can be one or more devices integrating at least one communication processing module. The transceiver 220 receives electromagnetic waves via the antenna 240, modulates the frequency of the electromagnetic wave signal and performs filtering, and sends the processed signal to the processor 210. The transceiver 220 can also receive the signal to be sent from the processor 210, modulate the frequency of the signal, amplify it, and convert it into electromagnetic waves for radiation through the antenna 240.

[0158] In some embodiments, the antenna 240 and the transceiver 220 of the electronic device are coupled so that the electronic device can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and / or IR technology, etc. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS) and / or satellite based augmentation system (SBAS).

[0159] The electronic device implements the display function through a GPU, a display unit 270, and an application processor. The GPU is a microprocessor for image processing, which connects the display unit 270 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 may include one or more GPUs that execute program instructions to generate or change display information.

[0160] The display unit 270 is used to display images, videos, etc. The display unit 270 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light emitting diode (OLED), an active matrix organic light emitting diode or an active matrix organic light emitting diode (AMOLED), a flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, a quantum dot light-emitting diode (QLED), etc. In some embodiments, the electronic device may include 1 or N display units 270, where N is a positive integer greater than 1.

[0161] The electronic device can implement a shooting function through an ISP, a camera 290, a video codec, a GPU, a display unit 270, and an application processor.

[0162] The ISP is used to process the data fed back by the camera 290. For example, when recording a video, the camera is turned on, light is transmitted to the camera photosensitive element through the lens, and the light signal is converted into an electrical signal. The camera photosensitive element transmits the electrical signal to the ISP for processing and converts it into an image visible to the naked eye. The ISP can also perform algorithm optimization on the noise, brightness, and skin color of the image.

[0163] ISP can also optimize the exposure, color temperature and other parameters of the shooting scene. In some embodiments, ISP can be set in camera 290. Camera 290 is used to capture still images or videos. The object generates an optical image through the lens and projects it onto the photosensitive element. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP for conversion into a digital image signal. ISP outputs the digital image signal to DSP for processing. DSP converts the digital image signal into an image signal in a standard RGB, YUV or other format. In some embodiments, the electronic device may include 1 or N cameras 290, where N is a positive integer greater than 1. The digital signal processor is used to process digital signals. In addition to processing digital image signals, it can also process other digital signals. For example, when the electronic device selects a frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy.

[0164] Video codecs are used to compress or decompress digital videos. Electronic devices can support one or more video codecs. In this way, electronic devices can play or record videos in multiple coding formats, such as Moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, etc.

[0165] NPU is a neural network (NN) computing processor. By drawing on the structure of biological neural networks, such as the transmission mode between neurons in the human brain, it can quickly process input information and continuously self-learn. NPU can realize applications such as intelligent cognition of electronic devices, such as image recognition, face recognition, voice recognition, text understanding, etc.

[0166] The memory 230 can be used to store computer executable program codes, which include instructions. The memory 230 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the electronic device (such as audio data, a phone book, etc.), etc. In addition, the memory 230 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 210 executes various functional applications and data processing of the electronic device by running instructions stored in the memory 230 and / or instructions stored in a memory provided in the processor.

[0167] The electronic device can implement audio functions such as music playing and recording through the audio circuit 280, the speaker 282, the microphone 284, and the application processor.

[0168] The audio circuit 280 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio circuit 280 can also be used to encode and decode audio signals. In some embodiments, the audio circuit 280 can be arranged in the processor 210, or some functional modules of the audio circuit 280 can be arranged in the processor 210.

[0169] The speaker 282, also called a "speaker", is used to convert an audio electrical signal into a sound signal. The electronic device can listen to music or listen to a hands-free call through the speaker 282.

[0170] Microphone 284, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can input the sound signal into microphone 284 by speaking close to microphone 284. The electronic device can be provided with at least one microphone 284. In other embodiments, the electronic device can be provided with two microphones 284, which can not only collect sound signals but also realize noise reduction function. In other embodiments, the electronic device can also be provided with three, four or more microphones 284 to realize sound signal collection, noise reduction, and can also identify the sound source, realize directional recording function, etc.

[0171] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0172] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A zoom lens, characterized in that: Comprising: An optical path folding member, a first lens group, and a second lens group, wherein the first lens group and the second lens group are located on the same side of the optical path folding member; The light emitted from the first lens group enters the optical path folding member along a first optical axis to form an outgoing light; The light is reflected multiple times within the optical path folding member, and the first lens group is located on the first optical axis; The second lens group can move between a first position and a second position. The first position is on the optical path through which the outgoing light passes, and the second position is between the first position and the first lens group and not on the optical path of the outgoing light; When the second lens group is located at the first position, the focal length of the zoom lens is FMIN, and when the second lens group is located at the second position, the focal length of the zoom lens is FMAX, satisfying: FMAX / FMIN > 1.3; The maximum distance from the surface of the zoom lens where light first enters to the surface of the optical path folding member away from the first lens group on the first optical axis is H, and the maximum distance between the first lens group and the second lens group in the direction perpendicular to the first optical axis is L, satisfying: H / L < 0.45, 1.8 < f1 / H < 3.

0.

2. The zoom lens according to claim 1, wherein: The focal length of the first lens group is f1, and the focal length of the second lens group is f2, satisfying: -3.0 < f1 / f2 < -1.

3.

3. The zoom lens according to claim 1, wherein: The optical path folding member is a prism. The optical path folding member sequentially includes a first transmission surface and a first reflection surface along the optical path direction. The included angle between the first transmission surface and the first reflection surface is θ, satisfying: 20° < θ < 40°.

4. The zoom lens according to claim 3, wherein: The optical path folding member sequentially includes a first transmission surface, a first reflection surface, a second reflection surface, a third reflection surface, a fourth reflection surface, a fifth reflection surface, and a second transmission surface along the optical path direction; wherein, the first transmission surface, the second reflection surface, the fourth reflection surface, and the second transmission surface are the same interface.

5. The zoom lens according to claim 1, wherein: The height of the first lens group on the first optical axis is H1, and the height of the optical path folding member on the first optical axis is H2, satisfying: H1 / H < 0.6, H2 / L < 0.

3.

6. The zoom lens according to claim 1, wherein: The radius of curvature of the incident surface of the first lens is R11, and the radius of curvature of the outgoing surface of the first lens is R12, satisfying: -2.0 < R11 / R12 < 0.

8. The first lens is the first lens included along the optical path direction.

7. The zoom lens according to claim 1, wherein: The radius of curvature of the incident surface of the second lens is R21, the radius of curvature of the outgoing surface of the second lens is R22, and the central thickness of the second lens is CT2, satisfying: 0 mm < R21 / R22 × CT2 < 2.0 mm. The second lens is the second lens included along the optical path direction.

8. The zoom lens according to claim 1, wherein: The maximum refractive index of the lenses in the first lens group and the second lens group is Ndmax, and the minimum refractive index of the lenses in the first lens group and the second lens group is Ndmin, satisfying: Ndmax - Ndmin > 0.

13.

9. The zoom lens according to claim 1, wherein: The center thickness of the third lens is CT3, the center thickness of the first lens along the image side pointing to the object side is CTL, satisfying: 0<(CT2+CT3) / CTL<3.5, and the third lens is the third lens included along the optical path.

10. The zoom lens according to claim 1, wherein: When the second lens group is located at the first position, the aperture value of the zoom lens is FNO1, which satisfies: 2.0 <FNO1<3.0。 11. A camera, characterized in that: A zoom lens comprising the zoom lens according to any one of claims 1 to 10.

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