Optical lens, camera module and electronic equipment

Abstract

The invention provides an optical lens, a camera module and electronic equipment. The optical lens comprises a first lens group and a second lens group, wherein each of the first lens group and the second lens group comprises a plurality of lenses; in different use scenes, the second lens group can be correspondingly moved to change the distance between the first lens group and the second lens group, so that the focal length of the optical lens is changed, and a good shooting effect can be realized through the optical lens provided by the invention in different use scenes. According to the optical lens, the second lens group is arranged in the back focal length range of the first lens group, so that the total optical length of the optical lens can be shorter, and the optical lens can be applied to thin electronic equipment.

Description

[0001] This application is a divisional application. The application number of the original application is: 202110479020.1, and the original application date is April 28, 2021. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The embodiments of the present application relate to the field of lenses, and specifically to an optical lens, a camera module and an electronic device. Background Art

[0003] As people's requirements for lens shooting scenes become more diverse and complex, lenses need to meet the requirements of achieving high-quality shooting effects in different scenes. For example, in photographic lenses, telephoto lenses (with longer focal lengths) can shoot distant objects, providing high magnification while ensuring good image quality. However, when users use telephoto lenses to shoot close-up scenes, the shooting effect of telephoto lenses is poor. Correspondingly, macro lenses can show extremely strong capabilities in shooting close-up macro scenes, but the quality of images taken in long-distance scenes is poor.

[0004] In order to solve the problem of incompatibility of camera lenses for shooting scenes in different positions during the shooting process, it is ensured that high-quality shooting effects can be achieved in different shooting scenes. Generally, multiple lenses are set in electronic devices, and different lenses correspond to different scenes, so as to ensure that good shooting effects can be achieved in different scenes. For example, general electronic devices will include a telephoto lens and a macro lens at the same time, and the telephoto lens is used to shoot distant scenes, and the macro lens is used to shoot nearby scenes, so as to ensure that good shooting effects can be achieved in different scenes. However, the space occupied by multiple lenses is large, and the setting of multiple lenses makes the structure of the electronic device more complicated, thereby increasing the production cost of the electronic device. Summary of the invention

[0005] The embodiments of the present application provide an optical lens, a camera module including the optical lens, and an electronic device including the camera module, aiming to adapt to different shooting scenes through one optical lens, thereby reducing the space occupied by the optical lens, simplifying the structure of the electronic device, and reducing the production cost of the electronic device.

[0006] In a first aspect, the present application provides an optical lens, which includes a first lens group and a second lens group arranged from the object side to the image side, and the first lens group and the second lens group are coaxially arranged; the first lens group and the second lens group each include a plurality of lenses, each of which includes an object side surface facing the object side and an image side surface facing the image side; the first lens group has a positive optical power, and the second lens group has a negative optical power; the second lens group can move relative to the first lens group along the axial direction, and the distance Δd that the second lens group can move relative to the first lens group satisfies: Δd≤4mm. The coaxial arrangement of the first lens group and the second lens group means that the optical axis of the first lens group is collinear with the optical axis of the second lens group.

[0007] In the present application, in different use scenarios, the second lens group is moved accordingly to change the distance between the first lens group and the second lens group, thereby changing the focal length of the optical lens, so as to ensure that in different use scenarios, the optical lens of the present application can achieve good shooting effects. The present application is moved in units of lens groups, the second lens group can be moved relative to the first lens group, and the distance between the lenses in a single lens group can remain unchanged, while the prior art is that each lens can be moved, so the distance between the lenses needs to be larger, and the total optical length is longer. In addition, in the present application, the first lens group and the second lens group are arranged from the object side to the image side, that is, the arrangement order of "object side-first lens group-second lens group-image side". The second lens group is located between the first lens group and the image side, that is, the second lens group is arranged within the back focal length range of the first lens group. Compared with the scheme of adjusting the distance between each lens of the optical lens to achieve the change of the optical lens, the total optical length of the optical lens of the present application can be shorter, so that the optical lens can be suitable for thin electronic devices.

[0008] Moreover, in the present application, the positive and negative focal powers of the first lens group and the second lens group can achieve a better effect of eliminating aberrations, thereby achieving a better optical effect. Moreover, the positive focal power of the first lens group can converge the external light so that as much light as possible is gathered in the optical lens. The focal power of the second lens group is a negative focal power, which can be used to expand the light beam, thereby increasing the image height of the image formed on the photosensitive element, so that the optical lens can match the photosensitive element with a large main light incident angle, and improve the imaging resolution of the optical lens.

[0009] In some embodiments of the present application, the distance Δd that the second lens group can move relative to the first lens group satisfies: Δd<4mm, that is, the relative movement between the first lens group and the second lens group varies between 0-4mm, which can meet the needs of the optical lens in different shooting scenarios, thereby ensuring that the optical lens can have a smaller total optical length in different application scenarios, so that the optical lens of the present application can be better applied to thin electronic devices such as mobile phones. In addition, since the relative movable distance between the first lens group and the second lens group is small, the requirements for the driving structure that drives the second lens group 12 to move are small, and the cost of the driving structure can be lower. And the volume of the driving structure can also be smaller, so that the optical lens can be more suitable for application in miniaturized devices such as mobile phones.

[0010] In some embodiments, the optical lens satisfies the following relationship: TTL≤25mm, where TTL is the total optical length of the optical lens. In other words, the total optical length of the optical lens of the present application is less than or equal to 25mm in different application scenarios (including long-range and macro application scenarios), that is, the total optical length of the optical lens of the present application can be smaller in different application scenarios, so that it can be better applied to thin electronic devices such as mobile phones.

[0011] In some embodiments, the optical lens satisfies the following relationship: 0<Δd / TTL≤0.25, wherein Δd is the distance that the second lens group can move relative to the first lens group, and TTL is the total optical length of the optical lens.

[0012] In the implementation manner of the present application, the optical lens satisfies the above-mentioned relationship, which can ensure that the optical lens can have a smaller total optical length in different usage scenarios, and at the same time ensure that when the optical lens is switched in different usage scenarios, the moving distance between the first lens group and the second lens group can be smaller, further making the optical lens better suitable for use in thin electronic devices such as mobile phones.

[0013] In some implementations, the optical lens satisfies the following relationship: F#≥2, where F# is the aperture F value of the optical lens.

[0014] The aperture F value of the optical lens is the ratio of the focal length of the lens to the diameter of the lens aperture. In the implementation of the present application, the lens aperture of the optical lens can ensure that the optical lens can have a suitable amount of light entering, so that the optical lens can have a better optical imaging effect. In addition, when the aperture F value of the optical lens satisfies the above relationship, the focal length of the optical lens can meet the requirements of the optical lens for different application scenarios (including telephoto and macro photography).

[0015] In some implementations of the present application, the lens aperture of the optical lens may be less than 20 mm.

[0016] In some embodiments, the position of the first lens group is fixed, and the second lens group moves to be closer to or farther away from the first lens group, thereby achieving relative movement between the second lens group and the first lens group, so as to ensure that the optical lens can be used for shooting in different application scenarios while having a smaller total optical length. In addition, in this embodiment, the position of the first lens group is fixed, so as to ensure that the relative position between the first lens group and the light entrance position (such as the light entrance hole) remains unchanged, and ensure that the amount of light entering the optical lens from the light entrance position remains unchanged in different application scenarios of the optical lens. In other words, the amount of light entering the optical lens in different application scenarios can be guaranteed, thereby ensuring the shooting effect of the optical lens in different application scenarios.

[0017] In some embodiments, the lenses of the first lens group include a first lens and a second lens arranged in sequence from the object side to the image side, the first lens has a positive optical power, the second lens has a negative optical power, and the combined optical power of the other lenses of the first lens group except the first lens and the second lens is a positive optical power. Wherein, the combined optical power of the other lenses of the first lens group except the first lens and the second lens refers to the optical power of the whole when the other lenses of the first lens group except the first lens and the second lens are taken as a whole. For example, when the first lens group includes a first lens, a second lens, a third lens and a fourth lens, the combined optical power of the other lenses of the first lens group except the first lens and the second lens refers to the optical power of the third lens and the fourth lens as a whole.

[0018] In the embodiment of the present application, the lenses of the first lens group include a first lens and a second lens arranged in sequence from the object side to the image side, the first lens has a positive optical power, the second lens has a negative optical power, and the combined optical power of the other lenses of the first lens group except the first lens and the second lens is a positive optical power, that is, the optical power of each lens of the first lens group is a combination of positive and negative, so as to achieve a better effect of correcting phase difference. In addition, the first lens has a positive optical power and a focusing effect, and can focus more external light into the optical lens, increase the amount of light entering the optical lens, and achieve a better photographing effect.

[0019] In some embodiments, the lenses of the second lens group include a first lens arranged in sequence from the object side to the image side, the first lens is a meniscus lens, and the image side surface of the first lens is a concave surface.

[0020] In the implementation manner of the present application, the first lens of the second lens group is a meniscus lens, that is, the object side surface of the first lens is convex and the image side surface is concave, or the object side surface of the first lens is concave and the image side surface is convex. In some implementation manners of the present application, if the image side surface of the first lens is concave, the object side surface of the first lens is convex, so that the light transmitted to the second lens group after passing through the first lens group can be diffused to a wider range, which plays a role in eliminating field curvature to a certain extent, so that the optical lens can have a better shooting effect.

[0021] In some implementations, the first lens group includes 3-4 lenses, and the second lens group includes 2-3 of the lenses.

[0022] In the implementation manner of the present application, the first lens group includes 3-4 lenses, and the second lens group includes 2-3 lenses, which can ensure that the optical lens has a good optical effect while minimizing the total optical length of the optical lens, so that the optical lens of this implementation can be more suitable for use in thin electronic devices.

[0023] In some embodiments, the optical lens satisfies the following relationship: 0.4<|f1 / f2|<1.1;

[0024] Wherein, f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

[0025] The optical lens of the present application satisfies the above relationship, that is, the focal lengths of the first lens group and the second lens group of the optical lens can be reasonably distributed, so that the optical lens can have a good imaging effect.

[0026] In some embodiments of the present application, the absolute value of the ratio of the focal length of the first lens group to the focal length of the second lens group |f1 / f2| is less than 1, that is, the focal length of the first lens group of the optical lens is smaller than the focal length of the second lens group, the first lens group has a stronger light adjustment ability than the second lens group, and the second lens group has a smaller effect on light adjustment, thereby reducing the difference in light adjustment effect of the second lens group on the optical lens when it moves between different positions, ensuring that when the second lens group is moved to adjust the focal length of the optical lens to achieve telephoto and macro photography, the imaging effect of the optical lens can always be good.

[0027] In some embodiments, the optical lens satisfies the following relationship: 0.4<|f2 / f|<1;

[0028] Wherein, f2 is the focal length of the second lens group, and f is the focal length of the first lens group and the second lens group of the optical lens when they are closest to each other. The first lens group and the second lens group move relative to each other until the two lens groups are in contact.

[0029] The optical lens of the present application satisfies the above relationship, that is, the focal length of the second lens group of the optical lens can be reasonably allocated, so that when the second lens group is moved according to the actual use requirements of the optical lens, the focal length of the optical lens can be adaptively adjusted to meet the shooting requirements of different scenes. In addition, the second lens group can cooperate with the first lens group to correct the aberration of the optical lens, reduce the generation of distortion, and improve the imaging quality of the optical lens 10.

[0030] In some embodiments, the first lens group of the optical lens satisfies the following relationship: 0.2<|f11 / f12|<1.1;

[0031] Wherein, f11 is the focal length of the first lens of the first lens group, and f12 is the focal length of the second lens of the first lens group.

[0032] The optical lens of the present application satisfies the above relationship, that is, the focal lengths of the first lens and the second lens of the first lens group can be reasonably distributed, so that the optical lens can have a good imaging effect.

[0033] In some embodiments of the present application, the absolute value of the ratio of the focal length of the first lens of the first lens group to the focal length of the second lens |f11 / f12| is less than 1, that is, in some embodiments of the present application, the absolute value of the optical focal length of the first lens of the first lens group is smaller than the absolute value of the focal length of the second lens, that is, the first lens has better refractive power and can have better light convergence effect, so as to converge more external light into the optical lens, increase the amount of light entering the optical lens, and make the optical lens have better imaging effect.

[0034] In some embodiments, the second lens group of the optical lens satisfies the following relationship: |f21 / f2L|<10;

[0035] Wherein, f21 is the focal length of the first lens of the second lens group, and f2L is the focal length of the lens closest to the image side in the second lens group.

[0036] The optical lens of the present application satisfies the above relationship, that is, the focal lengths of the first lens of the second lens group and the lens closest to the image side can be reasonably distributed, so that the second lens group can have a better light regulation effect, so that the second lens group can achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens, thereby ensuring that the optical lens can have a better shooting effect when different usage requirements are met.

[0037] In some embodiments of the present application, the absolute value of the focal length ratio of the first lens of the second lens group and the lens closest to the image side |f21 / f2L| is less than 1, that is, the absolute value of the focal length of the first lens of the second lens group is smaller than the absolute value of the focal length of the lens closest to the image side. Therefore, the refractive degree of the first lens of the second lens group is higher. Therefore, the light incident from the first lens group to the second lens group can be adjusted as quickly as possible after passing through the first lens, thereby ensuring that as few lenses as possible are used to achieve good adjustment in different usage scenarios, so as to ensure that the optical lens can have a good imaging effect in different usage scenarios.

[0038] In some embodiments, the second lens group of the optical lens satisfies the following relationship: 1.4<|1-β^2|<3.8;

[0039] Wherein, β is the ratio of the incident angle of the light on the second lens group to the exit angle, and 1-β^2 is the focal sensitivity of the second lens group.

[0040] In the implementation mode of the present application, the focal length sensitivity determines the light control capability and affects the focal length of the lens group. In the implementation mode, when the focal length sensitivity of the second lens group satisfies the above relationship, the focal length and light control capability of the second lens group are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens can achieve better imaging effects in different usage scenarios.

[0041] In some embodiments, the lens closest to the object side in the first lens group is made of glass, and the lens closest to the object side in the first lens group is a spherical lens.

[0042] In the embodiment of the present application, at least one lens in the first lens group is a glass lens, and the other lenses are glass lenses or plastic lenses. Since the relative refractive index temperature coefficient of the glass lens is low, that is, the refractive index of the glass lens changes less with temperature, the optical lens of the present application will have a greatly reduced temperature drift coefficient compared to the optical lens that uses all plastic lenses. In addition, generally speaking, the relationship between the refractive index of the glass lens and the temperature change satisfies: dn / dT>0; the relationship between the refractive index of the plastic lens and the temperature change satisfies: dn / dT<0. When the temperature changes, compensation will occur between the glass lens and the plastic lens, thereby reducing the temperature drift of the optical lens. In addition, in the present embodiment, the lens closest to the object side in the first lens group is generally the closest to the outside world, and is therefore most affected by temperature. Therefore, setting it as a glass lens can minimize the temperature drift of the optical lens.

[0043] Moreover, in the embodiment of the present application, the lens closest to the object side in the first lens group is a spherical lens, that is, the lens made of glass material can be a spherical lens, which can make the processing of the lens simpler than that of an aspherical lens.

[0044] In some embodiments, the multiple lenses of the first lens group include at least 4 aspherical surfaces; the lenses of the second lens group are all aspherical lenses, thereby ensuring that each lens of the optical lens has a higher surface degree of freedom, and the surface of the lens can be arbitrarily designed according to requirements, thereby reducing the aberration, field curvature and other problems of the optical lens, thereby making the optical lens have a better imaging effect.

[0045] In some embodiments, all lenses of the first lens group except the lens closest to the object side are aspherical lenses, and the lenses of the second lens group are also aspherical lenses, thereby ensuring that each lens of the optical lens has a high degree of freedom, thereby reducing optical problems such as better aberration elimination and field curvature, so as to ensure that the optical lens can have a better imaging effect.

[0046] In some embodiments, the optical lens further comprises an optical path deflection element, which can change the transmission direction of the light. The optical path deflection element is disposed on a side of the first lens component away from the second lens component, and the light is folded by the optical path deflection element and then emitted through the first lens component and the second lens component in sequence.

[0047] In the embodiment of the present application, the optical lens may be a periscope lens, that is, the axial direction of the first lens group and the second lens group may be perpendicular to the thickness direction of the electronic device, thereby avoiding the influence of the axial distance between the first lens group and the second lens group on the thickness of the electronic device. Light outside the electronic device may be incident into the optical lens along the thickness direction of the electronic device, and then folded by the optical path deflection element of the optical lens, and then sequentially passed through the first lens assembly and the second lens assembly, and then emitted to the photosensitive element for imaging.

[0048] It can be understood that in some other embodiments of the present application, since the total optical length of the optical lens of the present application can be made shorter, the axial direction of the optical lens can be directly set to be the same as the thickness direction of the electronic device. At this time, the light outside the electronic device does not need to be folded before entering the first lens group and the second lens group, that is, the optical lens can have no light path deflection element.

[0049] In a second aspect, the present application also provides a camera module, which includes a photosensitive element and the above-mentioned optical lens, wherein the photosensitive element is located on the image side of the optical lens, and the light is projected onto the photosensitive element after passing through the optical lens; the distance between the first lens assembly and the photosensitive element remains unchanged, and the second lens assembly can move between the first lens assembly and the photosensitive element along the optical axis.

[0050] The optical image obtained after passing through the optical lens is converted into an electrical signal by a photosensitive element, and then subsequent steps such as image processing are performed, so that an image with good imaging quality can be obtained. In addition, the distance between the first lens group and the photosensitive element of the optical lens of the present application remains unchanged, and the focal length of the optical lens is changed by moving the second lens group located between the first lens group and the photosensitive element, thereby ensuring that a good shooting effect can be achieved by the optical lens of the present application in different usage scenarios. In addition, in the present application, the second lens group is set within the back focal length range of the first lens group. Compared with the solution of adjusting the distance between the lenses of the optical lens to achieve the change of the optical lens, the total optical length of the optical lens of the present application can be shorter, so that the optical lens can be suitable for thin electronic devices.

[0051] In a third aspect, the present application also provides an electronic device, which includes an image processor and the above-mentioned camera module, the image processor is communicatively connected to the camera module, the camera module is used to acquire image data and input the image data into the image processor, and the image processor is used to process the image data output therein.

[0052] In the present application, the image data of the camera module is processed by an image processor to obtain better pictures or images. In addition, the optical lens of the present application can be zoomed in different usage scenarios, so that better imaging effects can be obtained under different usage requirements (long-range shooting and macro shooting). In addition, the total optical length of the optical lens of the present application can be smaller, so the thickness restriction of the optical lens on the electronic device will be smaller, that is, the electronic device can achieve a better thinning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of an electronic device according to an embodiment of the present application.

[0054] Figure 2 This is a schematic diagram of the structure of an electronic device according to another embodiment of the present application.

[0055] Figure 3 for Figure 2 Schematic diagram of the imaging principle of the electronic device shown.

[0056] Figure 4 This is a schematic diagram of the structure of the camera module of some embodiments of the present application.

[0057] Figure 5 for Figure 1 The partial cross-sectional schematic diagram of the electronic device according to the embodiment of the present application is shown after being cut along II.

[0058] Figure 6 Another embodiment of the present application is an electronic device along Figure 1 Schematic diagram of the partial cross section after II is cut.

[0059] Figure 7a This is a schematic structural diagram of the optical lens of the first embodiment of the present application when used for long-distance photography.

[0060] Figure 7b This is a schematic structural diagram of the optical lens of the first embodiment of the present application when used for macro photography.

[0061] Figure 8 This is a vertical axis spherical aberration curve diagram after light with wavelengths of 656nm, 587nm, and 486nm passes through the optical lens of the first embodiment of the present application.

[0062] Fig. 9 This is an astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the optical lens of the first embodiment of the present application.

[0063] Fig.10 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the first embodiment of the present application.

[0064] Fig.11a This is a schematic structural diagram of the optical lens of the second embodiment of the present application when used for long-distance photography.

[0065] Fig.11b This is a schematic structural diagram of the optical lens of the second embodiment of the present application when used for macro photography.

[0066] Fig.12 This is a vertical axis spherical aberration curve diagram of light with wavelengths of 656nm, 587nm, and 486nm after passing through the optical lens of the second embodiment of the present application.

[0067] Fig.13 This is an astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the optical lens of the second embodiment of the present application.

[0068] Fig.14 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the second embodiment of the present application.

[0069] Fig.15aThis is a schematic structural diagram of the optical lens of the third embodiment of the present application when used for long-distance photography.

[0070] Fig.15b This is a schematic structural diagram of the optical lens of the third embodiment of the present application when used for macro photography.

[0071] Fig.16 This is a vertical axis spherical aberration curve diagram after light with wavelengths of 656nm, 587nm, and 486nm passes through the optical lens of the third embodiment of the present application.

[0072] Fig.17 This is an astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens of the third embodiment of the present application.

[0073] Fig.18 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the third embodiment of the present application.

[0074] Fig.19a Shown is a schematic structural diagram of the optical lens of the fourth embodiment of the present application when used for long-distance photography.

[0075] Fig.19b Shown is a schematic structural diagram of the optical lens of the fourth embodiment of the present application when used for macro photography.

[0076] Fig. 20 This is a vertical axis spherical aberration curve diagram of light with wavelengths of 656nm, 587nm, and 486nm after passing through the optical lens of the fourth embodiment of the present application.

[0077] Fig.21 This is an astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens of the fourth embodiment of the present application.

[0078] Fig. 22 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the fourth embodiment of the present application.

[0079] Fig.23a This is a schematic structural diagram of the optical lens of the fifth embodiment of the present application when used for long-distance photography.

[0080] Figure 23b This is a schematic structural diagram of the optical lens of the fifth embodiment of the present application when used for macro photography.

[0081] Fig.24 This is a vertical axis spherical aberration curve diagram of light with wavelengths of 656nm, 587nm, and 486nm after passing through the optical lens of the fifth embodiment of the present application.

[0082] Fig.25This is an astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the optical lens of the fifth embodiment of the present application.

[0083] Fig.26 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the fifth embodiment of the present application.

[0084] Fig.27a This is a schematic structural diagram of the optical lens of the sixth embodiment of the present application when used for long-distance photography.

[0085] Figure 27b This is a schematic structural diagram of the optical lens of the sixth embodiment of the present application when used for macro photography.

[0086] Fig.28 This is a vertical axis spherical aberration curve diagram of light with wavelengths of 656nm, 587nm, and 486nm after passing through the optical lens of the sixth embodiment of the present application.

[0087] Fig.29 This is an astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens of the sixth embodiment of the present application.

[0088] Fig.30 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the sixth embodiment of the present application.

[0089] Fig.31a This is a schematic structural diagram of the optical lens of the seventh embodiment of the present application when used for long-distance photography.

[0090] Fig.31b This is a schematic structural diagram of the optical lens of the seventh embodiment of the present application when used for macro photography.

[0091] Fig.32 This is a vertical axis spherical aberration curve diagram of light with wavelengths of 656nm, 587nm, and 486nm after passing through the optical lens of the seventh embodiment of the present application.

[0092] Fig.33 This is an astigmatism field curvature diagram of light with a wavelength of 555nm after passing through the optical lens of the seventh embodiment of the present application.

[0093] Fig.34 This is a distortion diagram of light with a wavelength of 555nm passing through the optical lens of the seventh embodiment of the present application. DETAILED DESCRIPTION

[0094] For ease of understanding, before describing the various embodiments of the present application in conjunction with the accompanying drawings, the technical terms involved in the present application are first explained and described.

[0095] Focal length (f), also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the vertical distance from the optical center of a lens or lens group to the focal plane when an infinitely distant scene forms a clear image on the focal plane through the lens or lens group.

[0096] The aperture is a device used to control the amount of light that passes through the lens and reaches the photosensitive element. The aperture size is expressed in F number / F value.

[0097] The aperture F value (F#) is a relative value obtained by dividing the focal length of the lens by the diameter of the lens (the inverse of the relative aperture). The smaller the aperture F value, the more light enters in the same unit time; the larger the aperture F value, the smaller the depth of field, and the background content of the photo will be blurred.

[0098] Positive focal length, also known as positive refractive power, means that the lens has a positive focal length and has the effect of converging light.

[0099] Negative optical power, also known as negative refractive power, means that the lens has a negative focal length and has the effect of diverging light.

[0100] Total track length (TTL) refers to the total length from the end of the optical lens away from the imaging surface to the imaging surface, and is the main factor in the thickness of electronic devices. In this application, the total track length refers to the distance from the object side of the first lens of the first lens group to the photosensitive element on the optical axis of the optical lens.

[0101] Imaging plane: Imaging refers to the real image cast on the light screen by refraction, diffraction or straight-line propagation of light through a small hole. Imaging plane refers to the plane where the imaging is located.

[0102] The Abbe number, also known as the dispersion coefficient, is the difference ratio of the refractive index of an optical material at different wavelengths and represents the degree of dispersion of the material.

[0103] Half image height (IH), that is, the radius of the imaging circle.

[0104] The optical axis is an imaginary line that defines how an optical system conducts light. The optical axis is generally the light that passes vertically through the center of the lens.

[0105] The object side is divided by the optical lens and the side where the scene is located is the object side.

[0106] The image side is the side where the image of the scene is located, with the optical lens as the boundary.

[0107] Object side: the surface of the lens facing the object side is called the object side.

[0108] Image side: The surface of the lens facing the image side is called the image side.

[0109] Back focal length (BFL) is the on-axis distance between the image side of the lens closest to the image side and the imaging plane.

[0110] Distortion refers to the difference between the actual displayed positions of points in the image and their positions in an ideal system.

[0111] The field of view (FOV) refers to the angle formed by the two edges of the maximum range through which the image of the object being measured can pass through the lens, with the lens of the optical instrument as the vertex.

[0112] A free-form surface is a surface that cannot be composed of elementary analytical surfaces, but is composed of curves and surfaces that change freely in complex ways, namely the so-called free-form curves and surfaces.

[0113] The present application provides an electronic device, which may be a mobile phone, a tablet, a computer, a video camera, a camera, or other electronic devices with a photo or video function. Figure 1 , Figure 1 The figure shows a schematic diagram of the structure of an electronic device 1000 according to an embodiment of the present application. In this embodiment, the electronic device 1000 is a mobile phone. In other embodiments, the electronic device 1000 can be a tablet, a camera or other devices with a shooting function.

[0114] The electronic device 1000 may include a camera module 100 and an image processor 200 that is communicatively connected to the camera module 100. The camera module 100 is used to obtain image data and input the image data into the image processor 200 so that the image processor 200 processes the image data. The communication connection between the camera module 100 and the image processor 200 may include data transmission through an electrical connection such as a wiring connection, or may be achieved through other methods that can achieve data transmission such as an optical cable connection or wireless transmission.

[0115] The image processor 200 can optimize the digital image signal through a series of complex mathematical algorithms, and finally transmit the processed signal to a display or store it in a memory. The image processor 200 can be an image processing chip or a digital signal processing (DSP) chip.

[0116] Figure 1In the illustrated embodiment, the camera module 100 can be disposed on the back of the electronic device 1000 and is a rear camera of the electronic device 1000. In the present application, the electronic device 1000 includes a rear cover plate 1001, and a light entry hole 1002 is provided on the rear cover plate 1001. Light outside the electronic device 1000 enters the optical lens 10 in the camera module 100 through the light entry hole 1002. It should be understood that Figure 1 The installation position of the camera module 100 of the electronic device 1000 of the illustrated embodiment is merely schematic. In some other embodiments, the camera module 100 may also be installed at other positions on the electronic device 1000. For example, the camera module 100 may be installed on the front of the electronic device 1000 as a front camera of the electronic device 1000. Alternatively, the camera module 100 may be installed in the upper middle or upper right corner of the back of the electronic device 1000; or, the camera module 100 may not be arranged on the main body of the mobile phone, but on a component that is movable or rotatable relative to the mobile phone, for example, the component may be extended, retracted or rotated from the main body of the mobile phone, etc. This application does not impose any limitation on the installation position of the camera module 100.

[0117] See also Figure 2 , Figure 2 It is a structural diagram of an electronic device 1000 according to another embodiment of the present application. Figure 2 The camera module 100, the light entrance hole 1002 and the optical lens 10 and Figure 1 The same as in , will not be repeated here. Figure 2 In the embodiment shown, compared to Figure 1 , the electronic device 1000 further includes an analog-to-digital converter (DAC) 300. Figure 2 The analog-to-digital converter 300 is connected between the camera module 100 and the image processor 200. The analog-to-digital converter 300 is used to convert the analog image signal generated by the camera module 100 into a digital image signal and transmit it to the image processor 200, and then the digital image signal is processed by the image processor 200, and finally the image or video is displayed on the display screen or monitor.

[0118] In some embodiments, the electronic device 1000 may further include a memory 400, which is in communication with the image processor 200. The image processor 200 processes the image digital signal and then transmits the image to the memory 400, so that the image can be retrieved from the storage at any time and displayed on the display screen when the image needs to be viewed later (see Figure 2). In some implementations, the image processor 200 may further compress the processed image digital signal and then store it in the memory 400 to save space in the memory 400. It should be noted that Figure 2 It is only a structural diagram of an implementation method of the present application, in which the position structure of the camera module 100, image processor 200, analog-to-digital converter 300, and memory 400 shown therein are only for illustration.

[0119] See also Figure 3 , Figure 3 for Figure 2 Schematic diagram of the imaging principle of the electronic device 1000 shown. The camera module 100 includes an optical lens 10 and a photosensitive element 20. The photosensitive element 20 is located on the image side of the optical lens 10. Among them, the image side of the optical lens 10 refers to the side of the optical lens 10 that is close to the imaging of the scene. When the camera module 100 is working, the scene is imaged on the photosensitive element 20 through the optical lens 10. Specifically, the working principle of the camera module 100 is as follows: the light L reflected by the scene generates an optical image through the optical lens 10 and is projected onto the surface of the photosensitive element 20, and the photosensitive element 20 converts the optical image into an electrical signal, namely an analog image signal S1, and transmits the converted analog image signal S1 to the analog-to-digital converter 300, so as to be converted into a digital image signal S2 to the image processor 200 through the analog-to-digital converter 300.

[0120] The photosensitive element 20 is a semiconductor device, and the surface may contain hundreds of thousands to millions of photodiodes. When exposed to light, it will generate charges, thereby completing the conversion of optical signals into electrical signals. Optionally, the photosensitive element 20 can be any device that can convert optical signals into electrical signals. For example, the photosensitive element 20 can be a charge coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0121] The optical lens 10 affects the imaging quality and imaging effect. The optical lens 10 includes a plurality of lenses arranged from the object side to the image side, and mainly uses the refraction principle of the lenses to perform imaging. Specifically, the light of the object to be imaged forms a clear image on the focal plane through the optical lens 10, and the image of the scene is recorded by the photosensitive element 20 located on the imaging surface. There may be a gap between adjacent lenses, or they may be arranged close together. Each lens has a different main function, and the best imaging quality can be obtained by coordinating different lenses.

[0122] In some embodiments of the present application, the optical lens 10 further includes a filter 30 for correcting color deviation, and the filter 30 is located between the photosensitive element 20 and the lens of the optical lens 10. The light refracted by each lens of the optical lens 10 is irradiated onto the filter 30, and is transmitted to the photosensitive element 20 through the filter 30. The filter 30 can filter out unnecessary light projected onto the photosensitive element 20, prevent the photosensitive element 20 from generating false colors or ripples, so as to improve its effective resolution and color reproduction, and can prevent damage to the photosensitive element 20 by some specific light from the outside, thereby protecting the photosensitive element 20.

[0123] In some embodiments of the present application, the optical lens 10 may also include a protective element for protecting the photosensitive element 20, and the protective element is located between the photosensitive element 20 and the lens of the optical lens 10. The light refracted by each lens of the optical lens 10 is irradiated onto the protective element, and the protective element can filter out specific light that damages the photosensitive element 20, thereby avoiding damage to the photosensitive element 20 by some specific light from the outside, and protecting the photosensitive element 20. It should be noted that the filter 30 and the protective element of the present application are both flat structures, which will not affect the transmission direction of the light, thereby avoiding the filter 30 and the protective element from affecting the imaging effect.

[0124] It is understandable that in some embodiments of the present application, the camera module 100 may include multiple optical lenses 10, and the multiple optical lenses 10 may be suitable for different usage scenarios, thereby ensuring that the camera module 100 can have a good shooting effect in different usage scenarios. For example, in some embodiments, the camera module 100 may include an optical lens suitable for night shooting, an optical lens suitable for long-distance shooting, and an optical lens suitable for wide-angle shooting.

[0125] In the implementation mode of this application, Figure 3 As shown, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged from the object side to the image side, and the first lens group 11 and the second lens group 12 are coaxially arranged. Among them, the coaxial arrangement of the first lens group 11 and the second lens group 12 means that the optical axis of the first lens group 11 and the optical axis of the second lens group 12 are colinear. Light from outside the electronic device 1000 enters through the light entrance hole 1002 and then enters the first lens group 11 and the second lens group 12 in sequence. After the light is refracted, it is irradiated on the photosensitive element 20 to form an image. The first lens group 11 and the second lens group 12 each include a plurality of lenses. In this embodiment, the position of the first lens group 11 is fixed, that is, the relative position of the first lens group 11 and the photosensitive element 20 remains unchanged, and the second lens group 12 can move relative to the first lens group 11 along the direction of its optical axis.

[0126] In the present application, in different usage scenarios, the second lens group 12 is moved accordingly, and the distance between the first lens group 11 and the second lens group 12 can be changed, thereby changing the focal length of the optical lens 10, and further ensuring that the optical lens 10 of the present application can achieve good shooting effects in different usage scenarios. For example, in some embodiments of the present application, the optical lens 10 can be in a telephoto state and a macrophotography state. When the second lens group 12 moves relative to the first lens group 11, the optical lens 10 switches between the telephoto state and the macrophotography state. Specifically, when the optical lens 10 is in the telephoto state, the second lens group 12 moves to approach the first lens group 11 to adjust the focal length of the optical lens 10, thereby ensuring a good telephoto effect; when the optical lens 10 is in the macrophotography state, the second lens group 12 moves away from the first lens group 11 to adjust the focal length of the optical lens 10, thereby ensuring a good telephoto effect.

[0127] In some embodiments of the present application, the electronic device 1000 may further include a driving structure connected to the second lens group 12, so as to drive the second lens group 12 to move through the driving structure, thereby changing the distance between the first lens group 11 and the second lens group 12. In some embodiments, the driving structure may be a micro motor.

[0128] In the present application, the second lens group 12 is set within the back focal length range of the first lens group 11. Compared with the scheme of adjusting the distance between the lenses of the optical lens 10 to achieve the change of the optical lens 10, the lenses included in the first lens group 11 of the optical lens 10 of the present application do not need to move, so the distance between the lenses of the first lens group 11 can be smaller. Similarly, since the lenses included in the second lens group 12 of the optical lens 10 of the present application do not need to move, the distance between the lenses of the second lens group 12 can be smaller, thereby making the total optical length TTL of the optical lens 10 shorter, so that the optical lens 10 can be suitable for use in a thin electronic device 1000. Among them, the total optical length TTL of the embodiment of the present application refers to the distance from the object side of the first lens of the first lens group 11 to the photosensitive element 20 on the optical axis of the optical lens 10. In some embodiments of the present application, the total optical length TTL of the optical lens 10 can be less than 25 mm, which can be suitable for use in thin electronic devices 1000 such as mobile phones and tablets.

[0129] Moreover, in the embodiment of the present application, the position of the first lens group 11 is fixed, that is, the distance between the first lens group 11 of the optical lens 10 and the light entrance hole 1002 remains unchanged, so as to ensure that the amount of light entering the optical lens 10 from the light entrance hole 1002 remains unchanged in different application scenarios of the optical lens 10. In other words, the amount of light entering the optical lens 10 in different application scenarios can be guaranteed, thereby ensuring the shooting effect of the optical lens 10 in different application scenarios. It is understandable that in some other embodiments of the present application, the first lens group 11 of the optical lens 10 can also be moved, so as to adapt the optical lens 10 to the needs of different application scenarios (including telephoto and macro photography) through the coordinated movement of the first lens group 11 and the second lens group 12, so as to ensure that the optical lens 10 can have a better shooting effect in different application scenarios.

[0130] In some embodiments of the present application, the distance Δd that the second lens group 12 can move relative to the first lens group 11 satisfies: Δd<4mm, that is, the relative movement between the first lens group 11 and the second lens group 12 varies between 0-4mm, which can meet the needs of the optical lens 10 in different shooting scenes, thereby ensuring that the optical lens 10 can have a smaller total optical length in different application scenarios, so that the optical lens 10 of the present application can be better applied to thin electronic devices such as mobile phones. In addition, since the relative movable distance between the first lens group 11 and the second lens group 12 is small, the requirements for the driving structure that drives the second lens group 12 to move are small, and the cost of the driving structure can be lower. And the volume of the driving structure can also be smaller, so that the optical lens can be more suitable for application in miniaturized devices such as mobile phones.

[0131] In some embodiments of the present application, the optical lens 10 may also satisfy 0<Δd / TTL≤0.25. Wherein, Δd is the distance that the second lens group 12 can move relative to the first lens group 11, and TTL is the total optical length of the optical lens 10. Since the value of TTL of the present application is relatively small, when Δd / TTL satisfies the above range, Δd will be smaller, and the moving distance between the first lens group 11 and the second lens group 12 can be smaller. Therefore, it is possible to ensure that the optical lens 10 can have a smaller total optical length in different usage scenarios, and at the same time ensure that when the optical lens 10 is switched in different usage scenarios, the moving distance between the first lens group 11 and the second lens group 12 can be smaller, further making the optical lens 10 better suitable for thin electronic devices such as mobile phones.

[0132] Figure 4 The structure diagram of the camera module 100 of some embodiments of the present application is shown. Figure 3In the embodiment thereof, the second lens group 12 can move relative to the first lens group 11, as shown below. Figure 4 Further understanding. In some embodiments of the present application, compared to Figure 3 The optical lens 10 further includes a first lens barrel 10a and a second lens barrel 10b, wherein the second lens barrel 10b is installed in the first lens barrel 10a, and the second lens barrel 10b can move in the first lens barrel 10a along the axial direction of the first lens barrel 10a. The first lens barrel 10a and the second lens barrel 10b are coaxially arranged, that is, the central axis of the first lens barrel 10a and the central axis of the second lens barrel 10b are colinear. The multiple lenses of the first lens group 11 of the optical lens 10 are fixed in the first lens barrel 10a, and the multiple lenses of the first lens group 11 are coaxially arranged; the multiple lenses of the second lens group 12 of the optical lens 10 are fixed in the lens barrel 10a and fixed in the second lens barrel 10b, and the multiple lenses of the second lens group 12 are coaxially arranged. The second lens barrel 10b moves in the first lens barrel 10a along the axial direction of the first lens barrel 10a, and can drive the second lens group 12 fixed in the second lens barrel 10b to move relative to the first lens group 11. It is understandable that in some other embodiments of the present application, the optical lens 10 may also be other structures to achieve the movement of the second lens group 12 relative to the first lens group 11, and the present application does not impose any specific limitation thereto.

[0133] In the embodiment of the present application, the camera module 100 further includes a circuit board 50 and other structures. The circuit board 50 is fixed to the side of the first lens barrel 10a facing the image side. The circuit board 50 is used to transmit electrical signals. The circuit board 50 can be a flexible printed circuit (FPC) or a printed circuit board (PCB), wherein the FPC can be a single-sided flexible board, a double-sided flexible board, a multi-layer flexible board or a flexible circuit board of a mixed structure. Other components included in the camera module 100 are not described in detail here. The filter 30 or the protective element can be fixed to the end of the first lens barrel 10a of the optical lens 10 facing the image side, and is located between the second lens barrel 10b and the circuit board 50; or, it can also be fixed above the circuit board 50 by a bracket support. The photosensitive element 20 is fixed to the side of the circuit board 50 facing the first lens barrel 10a by bonding or patching, and the photosensitive element 20 is arranged opposite to the lens of the optical lens 10, and the optical image generated by the optical lens 10 can be projected onto the photosensitive element 20. In some embodiments, the analog-to-digital converter 300, the image processor 200, the memory 400, etc. are also integrated on the circuit board 50 by bonding or patching, so as to achieve communication connection between the photosensitive element 20, the analog-to-digital converter 300, the image processor 200, the memory 400, etc. through the circuit board 50.

[0134] Please review Figure 3 In the present application, the first lens group 11 and the second lens group 12 of the optical lens 10 both include multiple lenses, and any lens of the optical lens 10 may be a lens with positive or negative focal power, so as to ensure that each lens can play a certain optical effect, so as to ensure that the optical effect required by the optical lens 10 is achieved, while minimizing the number of lenses of the optical lens 10 and reducing the total optical length of the optical lens 10, so as to achieve the miniaturization of the optical lens 10, so that the volume occupied by the optical lens 10 when installed in the electronic device 1000 is small, and the influence of the optical lens 10 on the thickness of the terminal is reduced. When a plane mirror is inserted between multiple lenses, the plane mirror is not counted as a lens of the optical lens 10 of the present application. For example, when a plane mirror is inserted between the first lens group 11 and the second lens group 12, the plane mirror cannot be counted as a lens of the optical lens 10 of the embodiment of the present application.

[0135] In the embodiment of the present application, two lens groups (a first lens group 11 and a second lens group 12) are combined, and the focal length of the optical lens 10 is adjusted by moving the second lens group 12, so that the optical lens 10 can meet different application scenarios (such as telephoto and macrophotography). Specifically, in the embodiment of the present application, when the optical lens 10 is in a telephoto state, the distance between the first lens group 11 and the second lens group 12 of the optical lens 10 is the shortest; when the optical lens 10 is in a macrophotography state, the distance between the first lens group 11 and the second lens group 12 of the optical lens 10 is the farthest.

[0136] In some embodiments of the present application, the first lens group 11 has a positive focal length, and the second lens group 12 has a negative focal length. By matching the positive and negative focal lengths of the first lens group 11 and the second lens group 12, it is possible to achieve a better aberration elimination effect, thereby achieving a better optical effect. In addition, in the embodiments of the present application, the second lens group 12 has a negative focal length, which can diffuse the light to ensure that the optical lens 10 has a larger image height, so that the optical lens 10 can match the photosensitive element 20 with a large main light incident angle, thereby improving the imaging resolution of the optical lens 10.

[0137] In some embodiments of the present application, the first lens group 11 includes 3-4 lenses, and the second lens group 12 includes 2-3 lenses.

[0138] In the implementation manner of the present application, the first lens group 11 includes 3-4 lenses, and the second lens group 12 includes 2-3 lenses, which can ensure that the optical lens 10 has a good optical effect while minimizing the total optical length of the optical lens 10, so that the optical lens 10 of this implementation can be more suitable for use in a thin electronic device 1000.

[0139] It is understandable that in some other embodiments of the present application, the number of lenses included in the first lens group 11 may also be 2 or more than 3, or the number of lenses in the second lens group 12 may also be more than 3, but the total optical length of the optical lens 10 may be increased, thereby affecting the thickness and other dimensions of the electronic device 1000.

[0140] In some embodiments of the present application, the optical lens 10 satisfies the relationship: TTL≤25 mm, where TTL is the total optical length of the optical lens 10. In the embodiments of the present application, the total optical length of the optical lens 10 is small and the volume occupied is small so that it can be adapted to a thin electronic device 1000 such as a mobile phone.

[0141] In some embodiments of the present application, the lenses of the first lens group 11 include a first lens 111 and a second lens 112 arranged in sequence from the object side to the image side, the first lens 111 has a positive focal length, and the second lens 112 has a negative focal length. The combined focal length of the lenses of the first lens group 11 other than the first lens 111 and the second lens 112 is a positive focal length. For example, in some embodiments of the present application, the first lens group 11 includes three lenses, and the lenses other than the first lens 111 and the second lens 112 are the third lens 113, and therefore, the third lens 113 has a positive focal length. In some other embodiments of the present application, the first lens group 11 includes four lenses, and the lenses other than the first lens 111 and the second lens 112 are the third lens 113 and the fourth lens, and therefore, the combined focal length of the third lens 113 and the fourth lens is a positive focal length. In the embodiment of the present application, the first lens 111 has positive focal power, the second lens 112 has negative focal power, and the combined focal power of the other lenses of the first lens group 11 except the first lens 111 and the second lens 112 is positive focal power, that is, the focal power of each lens of the first lens group 11 is matched with positive and negative, so as to achieve a better effect of correcting the aberration. In addition, the first lens 111 has positive focal power and has a focusing effect, which can focus more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and achieve a better photographing effect.

[0142] In some embodiments of the present application, the optical lens 10 satisfies the relationship: F#≥2. Wherein, F# is the aperture F value of the optical lens 10. In the embodiments of the present application, the aperture F value of the optical lens 10 can satisfy the above relationship, and the optical lens 10 can have a lens aperture of a suitable size, thereby ensuring that the optical lens 10 can have a suitable amount of light input, so that the optical lens 10 can have a better optical imaging effect. In some embodiments of the present application, the lens aperture of the optical lens can be less than 20mm. Since the aperture F value of the optical lens 10 is the ratio of the focal length of the optical lens 10 to the diameter of the lens aperture, when the aperture F value of the optical lens 10 satisfies the above relationship, the lens aperture of the optical lens 10 can meet the light input requirement of the optical lens 10, and the focal length of the optical lens 10 can meet the requirements of the optical lens 10 for different application scenarios (including telephoto and macro photography).

[0143] In some embodiments, the lenses of the second lens group 12 include a first lens 121 arranged in sequence from the object side to the image side, and the first lens 121 is a meniscus lens, that is, the curvatures of the object side and the image side of the first lens 121 are both positive or both negative. In other words, the object side of the first lens 121 is a convex surface and the image side is a concave surface, or the object side of the first lens 121 is a concave surface and the image side is a convex surface. In some embodiments of the present application, the image side of the first lens 121 is a concave surface, which can make the light transmitted to the second lens group 12 after the first lens group 11 diffuse to a wider range, play a certain role in eliminating field curvature, so that the optical lens 10 can have a better shooting effect. It can be understood that in some embodiments of the present application, the image side of the first lens 121 can also be a convex surface.

[0144] In some implementations, the optical lens 10 satisfies the relationship: 0.4<|f1 / f2|<1.1, wherein f1 is the focal length of the first lens group 11 , and f2 is the focal length of the second lens group 12 .

[0145] The first lens group 11 and the second lens group 12 of the present application satisfy the above relationship, that is, the focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect.

[0146] In some embodiments of the present application, the absolute value of the ratio of the focal length of the first lens group 11 to the focal length of the second lens group 12 |f1 / f2| is less than 1, that is, the focal length of the first lens group 11 is smaller than the focal length of the second lens group 12, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the light adjustment ability of the first lens group 11 is stronger than that of the second lens group 12, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the second lens group 12 on the optical lens 10 when it moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0147] In some embodiments, the optical lens 10 satisfies the relationship: 0.4<|f2 / f|<1. Wherein, f2 is the focal length of the second lens group 12, and f is the focal length of the optical lens 10 when it is in a telephoto shooting state. In the embodiment of the present application, when the optical lens 10 is in a telephoto shooting state, the distance between the first lens group 11 and the second lens group 12 is closest. The optical lens 10 of the present application satisfies the above relationship, that is, the focal length of the second lens group 12 of the optical lens 10 can be reasonably allocated, so that when the second lens group is moved according to the actual use requirements of the optical lens 10, the focal length of the optical lens 10 can be adaptively adjusted to meet the shooting requirements of different scenes.

[0148] In some embodiments, the first lens group 11 of the optical lens 10 satisfies the relationship: 0.2<|f11 / f12|<1.1. Wherein, f11 is the focal length of the first lens 111 of the first lens group 11, and f12 is the focal length of the second lens 112 of the first lens group 11. The first lens 111 and the second lens 112 of the first lens group 11 of the present application satisfy the above relationship, that is, the focal lengths of the first lens 111 and the second lens 112 of the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In some embodiments of the present application, the absolute value of the ratio of the focal length of the first lens of the first lens group to the focal length of the second lens |f11 / f12| is less than 1, that is, in the embodiments of the present application, the absolute value of the optical focal length of the first lens 111 is smaller than the absolute value of the focal length of the second lens 112, that is, the first lens 111 can have better ability and can have better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, so that the optical lens 10 has a better imaging effect.

[0149] In some embodiments, the second lens group 12 of the optical lens 10 satisfies the relationship: |f21 / f2L|<10. Wherein, f21 is the focal length of the first lens 121 of the second lens group 12, and f2L is the focal length of the lens closest to the image side in the second lens group 12. In some embodiments of the present application, the second lens group 12 includes two lenses, and the two lenses are the first lens 121 and the second lens 122 arranged sequentially from the object side to the image side. Therefore, the lens closest to the image side in the second lens group 12 is the second lens 122. In some other embodiments, the second lens group 12 may include three lenses, and the three lenses are the first lens 121, the second lens 122, and the third lens 123 (not shown in the figure) arranged sequentially from the object side to the image side. Therefore, the lens closest to the image side in the second lens group 12 is the third lens 123.

[0150] The optical lens 10 of the present application satisfies the above relationship, that is, the focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, so that the second lens group 12 can achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met.

[0151] In some embodiments of the present application, the absolute value of the focal length ratio of the first lens 121 of the second lens group 12 and the lens closest to the image side |f21 / f2L| is less than 1, that is, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side. Therefore, the refractive degree of the first lens 121 of the second lens group 12 is relatively high. Therefore, the light incident from the first lens group 11 to the second lens group 12 can be adjusted as quickly as possible after passing through the first lens 121, thereby ensuring that as few lenses as possible are used to achieve good adjustment in different usage scenarios, so as to ensure that the optical lens 10 can have a good imaging effect in different usage scenarios.

[0152] In some embodiments, the second lens group 12 of the optical lens 10 satisfies the relationship: 1.4<|1-β^2|<3.8. Wherein, β is the ratio of the incident angle of the light on the second lens group 12 to the exit angle, and 1-β^2 is the focal sensitivity of the second lens group 12. In the embodiment of the present application, the focal sensitivity determines the magnitude of the light regulation ability and affects the focal length of the lens group. In the present embodiment, when the focal sensitivity of the second lens group 12 satisfies the above relationship, the focal length and light regulation ability of the second lens group 12 are within a suitable range, thereby achieving a better focal adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0153] In the embodiment of the present application, at least one lens in the first lens group 11 is a glass lens, and the other lenses are glass lenses or plastic lenses. Since the relative refractive index temperature coefficient of the glass lens is low, that is, the refractive index of the glass lens changes less with temperature, the optical lens 10 of the present application has a greatly reduced temperature drift coefficient compared to the optical lens 10 that uses all plastic lenses. In addition, generally speaking, the relationship between the refractive index of the glass lens and the temperature change satisfies: dn / dT>0, where dn refers to the change value of the refractive index and dT refers to the ratio of the temperature change value; the relationship between the refractive index of the plastic lens and the temperature change satisfies: dn / dT<0. When the temperature changes, compensation will occur between the glass lens and the plastic lens, thereby reducing the temperature drift of the optical lens 10. In the present embodiment, the lens closest to the object side in the first lens group 11 (i.e., the first lens 111) is a glass lens. Since the lens closest to the object side in the first lens group 11 is generally the closest to the outside world, it is most affected by temperature. Therefore, setting it as a glass lens can minimize the temperature drift of the optical lens 10.

[0154] In some embodiments, the multiple lenses of the first lens group 11 include at least 4 aspherical lenses, and the lenses of the second lens group 12 are all aspherical lenses, so as to ensure that each lens of the optical lens 10 has a higher surface degree of freedom, and the surface of the lens can be arbitrarily designed according to the needs, thereby reducing the aberration, field curvature and other problems of the optical lens 10, so that the optical lens 10 has a better imaging effect. In some embodiments of the present application, the lens closest to the object side in the first lens group 11 (i.e., the first lens 111) is a spherical lens, and the other lenses are all aspherical lenses. In some embodiments of the present application, since the material of the first lens 111 is glass material, the processing difficulty of glass lenses is relatively high. Therefore, when the first lens 111 is a spherical lens, the processing of the lens can be simpler than that of an aspherical lens. It is understandable that in some other embodiments of the present application, the other lenses of the first lens group 11 except the first lens 121 can also be glass lenses to further reduce the temperature drift of the optical lens 10. Furthermore, the surface of the glass lens included in the first lens group 11 may also be an aspherical surface to increase the surface freedom of the lens, so that the surface of the lens can be arbitrarily designed according to the requirements, thereby reducing the aberration, field curvature and other problems of the optical lens 10, so that the optical lens 10 has a better imaging effect. In some embodiments of the present application, the object side surface and the image side surface of the lens may also have one spherical surface and the other aspherical surface.

[0155] See also Figure 5 , Figure 5 Shown Figure 1A partial cross-sectional schematic diagram of the electronic device 1000 of the illustrated embodiment after being cut along II. In the present embodiment, when the camera module 100 is installed in the electronic device 1000, the axial direction of the optical lens 10 is the same as the thickness direction of the electronic device 1000 (i.e., the Z-axis direction in the figure), and the optical lens 10 is opposite to the light entrance hole 1002 on the electronic device 1000, and the light outside the electronic device 1000 is incident on the optical lens 10 through the light entrance hole 1002, and then emitted to the photosensitive element 20 after passing through the optical lens 10 to form an image. In the present embodiment, the axial direction of the optical lens 10 is the same as the axial direction of the first lens group 11 and the second lens group 12. The total optical length of the optical lens 10 will affect the thickness of the electronic device 1000. In the present application, since the total optical length of the optical lens 10 can be smaller, the thickness of the electronic device 1000 can be thinner, thereby realizing the thinning of the electronic device 1000.

[0156] See also Figure 6 , Figure 6 The electronic device 1000 according to another embodiment of the present application is shown as follows Figure 1 Schematic diagram of a partial cross section after being cut off in II. In this embodiment, the optical lens 10 can be a periscope lens, that is, the axial direction of the first lens group 11 and the second lens group 12 can be perpendicular to the thickness direction of the electronic device 1000 (Z-axis direction in the figure), so as to avoid the influence of the axial distance between the first lens group 11 and the second lens group 12 on the thickness of the electronic device 1000. In this embodiment, the axial direction of the first lens group 11 and the second lens group 12 is the X direction in the figure. The optical lens 10 also includes an optical path deflection element 40, which can change the transmission direction of light. In this embodiment, the optical path deflection element 40 is arranged on the side of the first lens group 11 away from the second lens group 12, and is opposite to the light entrance hole 1002 on the electronic device 1000. The optical lens 10 includes a light beam outside the electronic device 1000, which can be incident into the optical lens 10 through the light entrance hole 1002 along the thickness direction of the electronic device 1000, and then folded by the optical path deflection element 40 of the optical lens 10, and then sequentially passed through the first lens group 11 and the second lens group 12, and then emitted to the photosensitive element 20 for imaging. In this embodiment, the optical path deflection element 40 can be a prism, a reflector, etc. It can be understood that in some embodiments of the present application, a lens can also be arranged between the optical path deflection element 40 and the light entrance hole 1002 on the electronic device 1000 to further improve the imaging effect of the optical lens 10.

[0157] In the present application, the second lens group 12 is moved accordingly in different usage scenarios (including telephoto and macrophotography scenarios) to change the distance between the first lens group 11 and the second lens group 12, thereby changing the focal length of the optical lens 10, thereby ensuring that in different usage scenarios, the optical lens 10 of the present application can achieve good shooting effects. In addition, in the present application, the second lens group 12 is set within the back focal length range of the first lens group 11. Compared with the solution of adjusting the distance between the lenses of the optical lens 10 to achieve the change of the optical lens 10, the total optical length of the optical lens 10 of the present application can be shorter, so that the optical lens 10 can be suitable for use in a thin electronic device 1000. Furthermore, in the present application, by reasonably allocating the optical power of the first lens group 11 and the second lens group 12, and reasonably allocating the optical power of each lens in the first lens group 11 and the second lens group 12, and controlling the number of lenses, the aperture, focal length, thickness, refractive index and total optical length of the optical lens 10 are coordinated together, thereby ensuring that the optical lens 10 can have a good imaging effect in different application scenarios, while meeting the requirements of a compact optical system structure, so that the optical lens 10 is small in size and can be better applied to a small electronic device 1000.

[0158] The following will be combined Figure 7a to Figure 33 Some specific but non-limiting examples of embodiments of the present application are described in more detail.

[0159] See also Figure 7a and Figure 7b , Figure 7a FIG. 1 is a schematic structural diagram of the optical lens 10 according to the first embodiment of the present application when used for long-distance photography. Figure 7b The structure diagram of the optical lens 10 of the first embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The first lens group 11 has three lenses, namely, a first lens 111, a second lens 112, and a third lens 113, and the first lens 111, the second lens 112, and the third lens 113 are arranged in sequence from the object side to the image side. The second lens group 12 has two lenses, namely, a first lens 121 and a second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the first lens 121, and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, and the third lens 113, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0160] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 has positive power. The first lens 121 of the second lens group 12 has positive power, and the second lens 122 has negative power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0161] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the first embodiment of the present application are shown in Table 1.

[0162] Table 1 Design parameters of the optical lens 10 of the first embodiment

[0163]

[0164]

[0165] Among them, S11 represents the object side of the first lens 111, S12 represents the image side of the first lens 111, S13 represents the object side of the second lens 112, S14 represents the image side of the second lens 112, S15 represents the object side of the third lens 113, and S16 represents the image side of the third lens 113; S21 represents the object side of the first lens 121, S22 represents the image side of the first lens 121, S23 represents the object side of the second lens 122, S24 represents the image side of the second lens 122, S31 represents the object side of the filter 30, and S32 represents the image side of the filter 30. It should be noted that in the present application, the meanings of symbols such as S11, S12, S13, S14, S15, S16, S21, S22, S23, S24, S31, and S32 are the same, and will not be repeated when they appear again in the future.

[0166] Wherein, the thickness d1 represents the thickness of each lens of the optical lens 10 and the distance between the lenses when the optical lens 10 is in the telephoto state. Specifically, d1 / S11 represents the thickness of the first lens 111 when the optical lens 10 is in the telephoto state; d1 / S12 represents the distance between the image side of the first lens 111 and the object side of the second lens 112 when the optical lens 10 is in the telephoto state; d1 / S13 represents the thickness of the second lens 112 when the optical lens 10 is in the telephoto state; d1 / S14 represents the distance between the image side of the second lens 112 and the object side of the third lens 113 when the optical lens 10 is in the telephoto state; d1 / S15 represents the thickness of the third lens 113 when the optical lens 10 is in the telephoto state; d1 / S16 represents the distance between the image side of the third lens 113 and the object side of the first lens 121 when the optical lens 10 is in the telephoto state. d1 / S21 represents the thickness of the first lens 121 when the optical lens 10 is in the telephoto state; d1 / S22 represents the distance between the image side of the first lens 121 and the object side of the second lens 122 when the optical lens 10 is in the telephoto state; d1 / S23 represents the thickness of the second lens 122 when the optical lens 10 is in the telephoto state; d1 / S24 represents the distance between the image side of the second lens 122 and the object side of the filter 30 when the optical lens 10 is in the telephoto state; d1 / S31 represents the thickness of the filter 30 when the optical lens 10 is in the telephoto state; d1 / S32 represents the distance from the image side of the filter 30 to the photosensitive element 20 when the optical lens 10 is in the telephoto state.

[0167] Thickness d2 indicates the thickness of each lens of the optical lens 10 and the distance between the lenses when the optical lens 10 is in the macro shooting state. Specifically, d2 / S11 indicates the thickness of the first lens 111 when the optical lens 10 is in the macro shooting state; d2 / S12 indicates the distance between the image side of the first lens 111 and the object side of the second lens 112 when the optical lens 10 is in the macro shooting state; d2 / S13 indicates the thickness of the second lens 112 when the optical lens 10 is in the macro shooting state; d2 / S14 indicates the distance between the image side of the second lens 112 and the object side of the third lens 113 when the optical lens 10 is in the macro shooting state; d2 / S15 indicates the thickness of the third lens 113 when the optical lens 10 is in the macro shooting state; d2 / S16 indicates the distance between the image side of the third lens 113 and the object side of the first lens 121 when the optical lens 10 is in the macro shooting state. d2 / S21 represents the thickness of the first lens 121 when the optical lens 10 is in the macro shooting state; d2 / S22 represents the distance between the image side of the first lens 121 and the object side of the second lens 122 when the optical lens 10 is in the macro shooting state; d2 / S23 represents the thickness of the second lens 122 when the optical lens 10 is in the macro shooting state; d2 / S24 represents the distance between the image side of the second lens 122 and the object side of the filter 30 when the optical lens 10 is in the macro shooting state; d2 / S31 represents the thickness of the filter 30 when the optical lens 10 is in the macro shooting state; d2 / S32 represents the distance from the image side of the filter 30 to the photosensitive element 20 when the optical lens 10 is in the macro shooting state.

[0168] It should be noted that in the present application, the symbols d1, d2, d1 / S11, d1 / S12, d1 / S13, d1 / S14, d1 / S15, d1 / S16, d1 / S21, d1 / S22, d1 / S23, d1 / S24, d1 / S31, d1 / S32, d2 / S11, d2 / S12, d2 / S13, d2 / S14, d2 / S15, d2 / S16, d2 / S21, d2 / S22, d2 / S23, d2 / S24, d2 / S31, d2 / S32 have the same meaning and will not be repeated when they appear again in the future.

[0169] Table 2 shows the design parameters of each aspherical lens of the optical lens 10 of this embodiment. It should be noted that the aspherical lens mentioned in this application refers to a lens whose image side and object side are both aspherical. In this embodiment, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0170] Table 2 Design parameters of each lens of the optical lens 10 of the first embodiment

[0171]

[0172] Among them, K is the quadratic surface constant, A2, A4, A6, A8, A 10 , A 12 Symbols such as represent polynomial coefficients. It should be noted that the parameters in the table are expressed in scientific notation. For example, 3.7308E-03 means 3.7308×10 -03 ; -1.4773E-06 means -1.4773×10 -6 In this application, K, A2, A4, A6, A8, A 10 , A 12 The meanings of the symbols are the same and will not be repeated when they appear again.

[0173] In this embodiment, all aspheric surface shapes can be defined using but not limited to the following aspheric surface formula:

[0174]

[0175] Among them, z is the sagittal height of the aspherical surface (that is, the relative distance between the point on the aspherical surface with a distance r from the optical axis and the tangent plane tangent to the optical axis of the aspherical surface), r is the radial coordinate of the aspherical surface (that is, the vertical distance between the point on the aspherical curve and the optical axis), c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, αi is the i-th order aspherical coefficient, and ρ is the normalized axial coordinate.

[0176]

[0177] In this embodiment, by substituting the parameters in Table 2 into the above aspheric formula, the second lens 112, the third lens 113, the first lens 121 and the second lens 122 in the optical lens 10 of this embodiment can be designed.

[0178] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 3.

[0179] Table 3 Basic parameters of the optical lens 10 of the first embodiment

[0180]

[0181]

[0182] Wherein, f1 is the focal length of the first lens group 11 .

[0183] f2 is the focal length of the second lens group 12 .

[0184] f11 is the focal length of the first lens 111 of the first lens group 11 .

[0185] f12 is the focal length of the second lens 112 of the first lens group 11 .

[0186] f13 is the focal length of the third lens 113 of the first lens group 11 .

[0187] f21 is the focal length of the first lens 121 of the second lens group 12 .

[0188] f22 is the focal length of the second lens 122 of the second lens group 12 .

[0189] f is the focal length of the optical system.

[0190] F# is the aperture F value of the optical system.

[0191] β is the ratio of the incident angle to the exit angle of the second lens group 12, and |1-β^2| is the focal sensitivity.

[0192] TTL is the total optical length, that is, the axial distance from the object side surface of the first lens 111 of the first lens group 11 to the image plane.

[0193] It should be noted that in this application, the meanings of symbols such as TTL, ImgH, f, f1, f2, f11, f12, f13, f21, f22, β, |1-β^2|, and F# are the same and will not be repeated when they appear again in the future.

[0194] In this embodiment, the total optical length of the optical lens 10 is 16.828 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 0.999 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 2.32 mm.

[0195] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 1.32 mm. The application requirements of different scenes of the optical lens 10 can be met by moving a short distance, and the requirements for the driving structure that drives the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.138. In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 of the optical lens 10 to the second lens group 12 is 0.74, the focal length ratio |f1 / f| of the first lens group 11 of the optical lens 10 to the optical lens 10 is 0.47, and the focal length ratio |f2 / f| of the second lens group 12 of the optical lens 10 to the optical lens 10 is 0.63. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. The second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. In addition, in this embodiment, the absolute value of the ratio of the focal length of the first lens group 11 to the focal length of the second lens group 12 |f1 / f2| is less than 1, that is, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the second lens group 12 on the optical lens 10 when it moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0196] In this embodiment, the focal length ratio of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.45. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0197] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L| which is 0.23. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the second lens 122) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the second lens 122), i.e., the refractive degree of the first lens 121 of the second lens group 12 is higher. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios by using as few lenses as possible, thereby ensuring that the optical lens 10 can have good imaging effects in different usage scenarios.

[0198] The focal length sensitivity |1-β^2| of the second lens group 12 is 3.54, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 2.13. In this embodiment, the focal length and light regulation capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0199] See also Figure 8 , Fig. 9 and Fig.10 , Figure 8 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm, and 486 nm after passing through the optical lens 10 of the first embodiment. Figure 8 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig. 9 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the first embodiment. Fig. 9 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.10 The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the first embodiment. Fig.10 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the first embodiment, in %. Figure 8 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig. 9 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.10 It can be seen that the distortion of the light after passing through the optical lens 10 of this embodiment is small, that is, the distortion of the imaging of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect. Among them, spherical aberration is the difference between the actual light and the paraxial or axial light caused by the spatial change of the optical lens.

[0200] See also Fig.11a and Fig.11b , Fig.11a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a second embodiment of the present application when used for long-distance photography. Fig.11b The structure diagram of the optical lens 10 of the second embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The first lens group 11 has three lenses, namely, a first lens 111, a second lens 112, and a third lens 113, and the first lens 111, the second lens 112, and the third lens 113 are arranged in sequence from the object side to the image side. The second lens group 12 has two lenses, namely, a first lens 121 and a second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the first lens 121, and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, and the third lens 113, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0201] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 has positive power. The first lens 121 and the second lens 122 of the second lens group 12 have negative power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0202] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the second embodiment of the present application are shown in Table 4.

[0203] Table 4 Design parameters of the optical lens 10 of the second embodiment

[0204]

[0205]

[0206] Table 5 shows the design parameters of the aspherical lenses of the optical lens 10 of this embodiment. In this embodiment, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0207] Table 5 Design parameters of each aspherical lens of the optical lens 10 of the second embodiment

[0208]

[0209] In this embodiment, all aspheric surface shapes can be defined using but not limited to the following aspheric surface formula:

[0210]

[0211] Among them, z is the sagittal height of the aspherical surface (that is, the relative distance between the point on the aspherical surface with a distance r from the optical axis and the tangent plane tangent to the optical axis of the aspherical surface), r is the radial coordinate of the aspherical surface (that is, the vertical distance between the point on the aspherical curve and the optical axis), c is the vertex spherical curvature of the aspherical surface, K is the quadratic surface constant, αi is the i-th order aspherical coefficient, and ρ is the normalized axial coordinate.

[0212]

[0213] In this embodiment, by substituting the parameters in Table 2 into the above aspheric formula, the second lens 112, the third lens 113, the first lens 121 and the second lens 122 in the optical lens 10 of this embodiment can be designed.

[0214] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 6.

[0215] Table 6 Basic parameters of the optical lens 10 of the second embodiment

[0216] parameter Value parameter Value f1(mm) 10.28 f22(mm) 29.8 f2(mm) -14.22 f(mm) 16.53 f11(mm) 9.50 F#(mm) 3.00 f12(mm) -25.79 IH(mm) 4.2 f13(mm) 24.88 β 1.61 f21(mm) -9.97 |1-β^2| 1.58 TTL(mm) 17.248

[0217] In this embodiment, the total optical length of the optical lens 10 is 17.248 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 1.084 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 3.58 mm.

[0218] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 2.49 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.144.

[0219] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 0.72, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.62, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.86. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. Moreover, in the present embodiment, the absolute value of the ratio of the focal length of the first lens group 11 to the focal length of the second lens group 12 |f1 / f2| is less than 1, that is, the focal length of the first lens group 11 is smaller than the focal length of the second lens group 12, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the optical lens 10 when the second lens group 12 moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0220] In this embodiment, the focal length ratio of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.37. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0221] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L| which is 0.33. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the second lens 122) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the second lens 122), i.e., the first lens 121 of the second lens group 12 has a higher refractive degree. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios using as few lenses as possible, thereby ensuring that the optical lens 10 can have a good imaging effect in different usage scenarios.

[0222] The focal length sensitivity |1-β^2| of the second lens group 12 is 3.54, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 2.13. In this embodiment, the focal length and light regulation capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0223] See also Fig.12 , Fig.13 and Fig.14 , Fig.12 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm and 486 nm after passing through the optical lens 10 of the second embodiment. Fig.12 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.13 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the second embodiment. Fig.13 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.14 The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the second embodiment. Fig.14 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the second embodiment, in %. Fig.12 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.13 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.14 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0224] See also Fig.15a and Fig.15b , Fig.15a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a third embodiment of the present application when used for long-distance photography. Fig.15b The structure diagram of the optical lens 10 of the third embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The first lens group 11 has three lenses, namely, a first lens 111, a second lens 112, and a third lens 113, and the first lens 111, the second lens 112, and the third lens 113 are arranged in sequence from the object side to the image side. The second lens group 12 has two lenses, namely, a first lens 121 and a second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the first lens 121, and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, and the third lens 113, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0225] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 has positive power. The first lens 121 of the second lens group 12 has positive power, and the second lens 122 has negative power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a convex surface.

[0226] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the third embodiment of the present application are shown in Table 7.

[0227] Table 7 Design parameters of the optical lens 10 of the third embodiment

[0228]

[0229]

[0230] Table 8 shows the design parameters of the aspherical lenses of the optical lens 10 of this embodiment. In this embodiment, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0231] Table 8 Design parameters of each aspherical lens of the optical lens 10 of the third embodiment

[0232]

[0233] By substituting the above parameters into the formula:

[0234]

[0235] , that is, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 can be designed. In this embodiment,

[0236]

[0237] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 9.

[0238] Table 9 Basic parameters of the optical lens 10 of the third embodiment

[0239] parameter Value parameter Value f1(mm) 7.94 f22(mm) -7.77 f2(mm) -7.76 f(mm) 16.55 f11(mm) 10.3 F#(mm) 3.1 f12(mm) -26.48 IH(mm) 4 f13(mm) 10.13 β 2.08 f21(mm) -71.14 |1-β^2| 3.34 TTL(mm) 17.23

[0240] In this embodiment, the total optical length of the optical lens 10 is 17.23 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 0.95 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 2.03 mm.

[0241] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 1.08 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.144.

[0242] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 1.02, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.48, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.47. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10.

[0243] In this embodiment, the ratio of the focal length of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.39. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0244] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L|, which is 9.16. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met.

[0245] The focal length sensitivity |1-β^2| of the second lens group 12 is 3.34, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 2.08. In this embodiment, the focal length and light control capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0246] See also Fig.16 , Fig.17 and Fig.18 , Fig.16 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm and 486 nm after passing through the optical lens 10 of the third embodiment. Fig.16 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.17 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the third embodiment. Fig.17 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.18The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the third embodiment. Fig.18 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the third embodiment, in %. Fig.16 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.17 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.18 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0247] See also Fig.19a and Fig.19b , Fig.19a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a fourth embodiment of the present application when used for long-distance photography. Fig.19b The structure diagram of the optical lens 10 of the fourth embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The lenses of the first lens group 11 are three, namely, the first lens 111, the second lens 112, and the third lens 113, and the first lens 111, the second lens 112, and the third lens 113 are arranged in sequence from the object side to the image side. The lenses of the second lens group 12 are two, namely, the first lens 121 and the second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the first lens 121, and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, and the third lens 113, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0248] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 has positive power. The first lens 121 and the second lens 122 of the second lens group 12 both have negative power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0249] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the fourth embodiment of the present application are shown in Table 10.

[0250] Table 10 Design parameters of the optical lens 10 of the fourth embodiment

[0251]

[0252] Table 11 shows the design parameters of the aspherical lenses of the optical lens 10 of this embodiment. In this embodiment, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0253] Table 11 Design parameters of each aspherical lens of the optical lens 10 of the fourth embodiment

[0254]

[0255]

[0256] By substituting the above parameters into the formula:

[0257]

[0258] , that is, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 can be designed. In this embodiment,

[0259]

[0260] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 12.

[0261] Table 12 Basic parameters of the optical lens 10 of the fourth embodiment

[0262] parameter Value parameter Value f1(mm) 8.68 f22(mm) -17.72 f2(mm) -8.78 f(mm) 16.50 f11(mm) 14.4 F#(mm) 3 f12(mm) -14.45 IH(mm) 4 f13(mm) 7.67 β 1.90 f21(mm) -17.29 |1-β^2| 2.61 TTL(mm) 17.23

[0263] In this embodiment, the total optical length of the optical lens 10 is 17.23 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 0.88 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 3.361 mm.

[0264] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 2.48 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.144.

[0265] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 0.99, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.53, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.53. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. Moreover, in the present embodiment, the absolute value of the ratio of the focal length of the first lens group 11 to the focal length of the second lens group 12 |f1 / f2| is less than 1, that is, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the optical lens 10 when the second lens group 12 moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0266] In this embodiment, the ratio of the focal length of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.99. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0267] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L| which is 0.98. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the second lens 122) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the second lens 122), i.e., the refractive degree of the first lens 121 of the second lens group 12 is higher and greater. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios by using as few lenses as possible, thereby ensuring that the optical lens 10 can have good imaging effects in different usage scenarios.

[0268] The focal length sensitivity |1-β^2| of the second lens group 12 is 2.61, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 1.90. In this embodiment, the focal length and light regulation capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0269] See also Fig. 20 , Fig.21 and Fig. 22 , Fig. 20 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm and 486 nm after passing through the optical lens 10 of the fourth embodiment. Fig. 20 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.21 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the fourth embodiment. Fig.21 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig. 22The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the fourth embodiment. Fig. 22 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the fourth embodiment, in %. Fig. 20 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.21 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig. 22 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0270] See also Fig.23a and Figure 23b , Fig.23a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a fifth embodiment of the present application when used for long-distance photography. Figure 23b The structure diagram of the optical lens 10 of the fifth embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The first lens group 11 has four lenses, namely, a first lens 111, a second lens 112, a third lens 113 and a fourth lens 114, and the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114 are arranged in sequence from the object side to the image side. The second lens group 12 has two lenses, namely, a first lens 121 and a second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the first lens 121 and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0271] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 and the fourth lens 114 both have positive power. The first lens 121 of the second lens group 12 has negative power, and the second lens 122 has positive power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0272] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the fifth embodiment of the present application are shown in Table 13.

[0273] Table 13 Design parameters of the optical lens 10 of the fifth embodiment

[0274] Face number Surface type Curvature radius (mm) Thickness d1(mm) Thickness d2(mm) Material refractive index Material Abbe number S11 Spherical 5.599 1.900 6.600 1.62 63.9 S12 Spherical infinity 0.900 0.850 S13 Aspheric -3.123 0.600 0.000 1.66 20.4 S14 Aspheric -4.506 0.230 1.900 S15 Aspheric -126.212 0.760 0.900 1.54 55.9 S16 Aspheric -8.462 0.400 0.600 S17 Spherical -5.000 0.960 0.230 1.58 59.5 S18 Spherical -4.654 0.700 0.760 S21 Aspheric 20.630 0.550 0.400 1.54 55.9 S22 Aspheric 4.591 1.600 0.960 S23 Aspheric -60.971 2.180 3.200 1.54 55.9 S24 Aspheric -61.439 4.800 0.550 S31 Spherical infinity 0.210 0.210 1.52 64.17 S32 Spherical infinity 1.380 1.380

[0275] Among them, S17 represents the object side of the fourth lens 114, and S18 represents the image side of the fourth lens 114. It should be noted that in the present application, the symbols S17, S18, etc. have the same meanings and will not be repeated when they appear again in the following.

[0276] Table 14 shows the design parameters of the aspherical lenses of the optical lens 10 of this embodiment. In this embodiment, the second lens 112, the third lens 113, the fourth lens 114 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0277] Table 14 Design parameters of each aspherical lens of the optical lens 10 of the fifth embodiment

[0278]

[0279]

[0280] By substituting the above parameters into the formula:

[0281]

[0282] , that is, the second lens 112 and the third lens 113 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 can be designed. In this embodiment,

[0283]

[0284] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 15.

[0285] Table 15 Basic parameters of the optical lens 10 of the fifth embodiment

[0286] parameter Value parameter Value f1(mm) 8.92 f22(mm) 22890.06 f2(mm) -11.12 f(mm) 16.46 f11(mm) 9.0 F#(mm) 3.00 f12(mm) -18.59 IH(mm) 4.5 f13(mm) 16.62 β 1.84 f14(mm) 57.05 |1-β^2| 2.38 f21(mm) -10.98 TTL(mm) 17.17

[0287] Wherein, f14 is the focal length of the fourth lens 114 of the first lens group 11. It should be noted that in the present application, symbols such as f14 have the same meanings and will not be described again in the following.

[0288] In this embodiment, the total optical length of the optical lens 10 is 17.17 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 0.7 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 3.2 mm.

[0289] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 2.5 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.146.

[0290] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 0.8, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.54, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.68. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. Moreover, in the present embodiment, the absolute value of the ratio of the focal length of the first lens group 11 to the focal length of the second lens group 12 |f1 / f2| is less than 1, that is, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the optical lens 10 when the second lens group 12 moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0291] In this embodiment, the ratio of the focal length of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.49. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0292] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L| which is 0.0005. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the second lens 122) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the second lens 122), i.e., the refractive degree of the first lens 121 of the second lens group 12 is higher. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios by using as few lenses as possible, thereby ensuring that the optical lens 10 can have good imaging effects in different usage scenarios.

[0293] The focal length sensitivity |1-β^2| of the second lens group 12 is 2.38, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 1.84. In this embodiment, the focal length and light control capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0294] See also Fig.24 , Fig.25 and Fig.26 , Fig.24 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm and 486 nm after passing through the optical lens 10 of the fifth embodiment. Fig.24 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.25 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the fifth embodiment. Fig.25 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.26The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the fifth embodiment. Fig.26 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the fifth embodiment, in %. Fig.24 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.25 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.26 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0295] See also Fig.27a and Figure 27b , Fig.27a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a sixth embodiment of the present application when used for long-distance photography. Figure 27b The structure diagram of the optical lens 10 of the sixth embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The first lens group 11 has four lenses, namely, a first lens 111, a second lens 112, a third lens 113, and a fourth lens 114, and the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114 are arranged in sequence from the object side to the image side. The second lens group 12 has two lenses, namely, a first lens 121 and a second lens 122, and the first lens 121 and the second lens 122 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the first lens 121, and the second lens 122 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114, and the axial direction of the second lens group 12 is the axial direction of the first lens 121 and the second lens 122. The first lens group 11 is coaxial with the second lens group 12.

[0296] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the combination of the third lens 113 and the fourth lens 114 has positive power. The first lens 121 and the second lens 122 of the second lens group 12 both have negative power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0297] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the sixth embodiment of the present application are shown in Table 16.

[0298] Table 16 Design parameters of the optical lens 10 of the sixth embodiment

[0299] Face number Surface type Curvature radius (mm) Thickness d1(mm) Thickness d2(mm) Material refractive index Material Abbe number S11 Spherical 6.160 1.900 1.900 1.62 63.9 S12 Spherical infinity 0.900 0.900 S13 Aspheric -22.056 0.600 0.600 1.64 23.5 S14 Aspheric 8.939 0.230 0.230 S15 Aspheric -20.806 0.760 0.760 1.64 23.5 S16 Aspheric -9.300 0.100 0.100 S17 Aspheric 24.704 0.660 0.660 1.54 55.9 S18 Aspheric -9.690 1.000 2.680 S21 Aspheric 52.815 0.600 0.600 1.54 55.9 S22 Aspheric 4.829 1.218 1.218 S23 Aspheric 9.677 1.600 1.600 1.54 55.9 S24 Aspheric 11.431 4.700 3.020 S31 Spherical infinity 0.210 0.210 1.5168 64.17 S32 Spherical infinity 1.800 1.800

[0300] Table 17 shows the design parameters of the aspherical lenses of the optical lens 10 of this embodiment. In this embodiment, the second lens 112, the third lens 113, the fourth lens 114 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 are all aspherical lenses.

[0301] Table 17 Design parameters of each aspherical lens of the optical lens 10 of the sixth embodiment

[0302]

[0303]

[0304] By substituting the above parameters into the formula:

[0305]

[0306] , that is, the second lens 112, the third lens 113, the fourth lens 114 of the first lens group 11, and the first lens 121 and the second lens 122 of the second lens group 12 can be designed. In this embodiment,

[0307]

[0308] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 18.

[0309] Table 18 Basic parameters of the optical lens 10 of the sixth embodiment

[0310] parameter Value parameter Value f1(mm) 9.30 f22(mm) 87.76 f2(mm) -10.62 f(mm) 16.61 f11(mm) 9.9 F#(mm) 3.00 f12(mm) -9.87 IH(mm) 4.5 f13(mm) 25.26 β 1.79 f14(mm) 12.89 |1-β^2| 2.19 f21(mm) -9.82 TTL(mm) 16.278

[0311] In this embodiment, the total optical length of the optical lens 10 is 16.278 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 1 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 2.68 mm.

[0312] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 1.68 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.1.

[0313] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 0.88, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.56, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.64. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. Moreover, in the present embodiment, the absolute value of the focal length of the first lens group 11 is smaller than the absolute value of the focal length of the second lens group 12, that is, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the optical lens 10 when the second lens group 12 moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0314] In this embodiment, the focal length ratio of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 |f11 / f12| is 1.01, and the focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect.

[0315] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the second lens 122) is |f21 / f2L| which is 0.11. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the second lens 122) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the second lens 122), i.e., the refractive degree of the first lens 121 of the second lens group 12 is higher. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios by using as few lenses as possible, thereby ensuring that the optical lens 10 can have good imaging effects in different usage scenarios.

[0316] The focal length sensitivity |1-β^2| of the second lens group 12 is 2.19, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 1.79. In this embodiment, the focal length and light regulation capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0317] See also Fig.28 , Fig.29 and Fig.30 , Fig.28 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm, and 486 nm after passing through the optical lens 10 of the sixth embodiment. Fig.28 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.29 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the sixth embodiment. Fig.29 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.30 The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the sixth embodiment. Fig.30 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the fifth embodiment, in %. Fig.28 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.29 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.30 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0318] See also Fig.31a and Fig.31b , Fig.31a FIG. 1 is a schematic structural diagram of an optical lens 10 according to a seventh embodiment of the present application when used for long-distance photography. Fig.31b The structure diagram of the optical lens 10 of the seventh embodiment of the present application when used for macro photography is shown. In this embodiment, the optical lens 10 includes a first lens group 11 and a second lens group 12 arranged in sequence from the object side to the image side. The lenses of the first lens group 11 are four, namely the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114, and the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114 are arranged in sequence from the object side to the image side. The lenses of the second lens group 12 are two, namely the first lens 121, the second lens 122, and the third lens 123, and the first lens 121, the second lens 122, and the third lens 123 are arranged in sequence from the object side to the image side. In this embodiment, the first lens 111, the second lens 112, the third lens 113, the fourth lens 114, the first lens 121, the second lens 122, and the third lens 123 are arranged coaxially. In this embodiment, the axial direction of the first lens group 11 is the optical axis direction of the first lens 111, the second lens 112, the third lens 113, and the fourth lens 114. The axial direction of the second lens group 12 is the optical axis direction of the first lens 121, the second lens 122, and the third lens 123. The first lens group 11 is coaxial with the second lens group 12.

[0319] The first lens group 11 has positive power, and the second lens group 12 has negative power. The first lens 111 of the first lens group 11 has positive power, the second lens 112 has negative power, and the third lens 113 and the fourth lens 114 both have positive power. The first lens 121 of the second lens group 12 has negative power, and the second lens 122 and the third lens 123 both have positive power. The first lens 121 of the second lens group 12 is a meniscus lens, and the image side surface of the first lens 121 is a concave surface.

[0320] In this embodiment, the first lens 111 of the first lens group 11 is made of glass. The object side and image side of the first lens 111 of the first lens group 11 are both spherical surfaces, and the object side and image side of the second lens 112 and the third lens 113 are both high-order aspherical surfaces. The object side and image side of the first lens 121 and the second lens 122 of the second lens group 12 are both high-order aspherical surfaces. Based on the above-mentioned relationship equations satisfied by the optical lens 10 of the present application, the design parameters of the optical lens 10 of the seventh embodiment of the present application are shown in Table 19.

[0321] Table 19 Design parameters of the optical lens 10 of the seventh embodiment

[0322]

[0323]

[0324] Among them, S25 represents the object side surface of the third lens 123 of the second lens group 12, and S26 represents the image side surface of the third lens 123 of the second lens group 12. It should be noted that in the present application, the symbols S25, S26, etc. have the same meaning and will not be repeated when they appear again in the following.

[0325] Table 20 shows the design parameters of each aspherical lens of the optical lens 10 of this embodiment. In this embodiment, the second lens 112, the third lens 113, the fourth lens 114 of the first lens group 11, and the first lens 121, the second lens 122, and the third lens 123 of the second lens group 12 are all aspherical lenses.

[0326] Table 20 Design parameters of each aspherical lens of the optical lens 10 of the seventh embodiment

[0327]

[0328] By substituting the above parameters into the formula:

[0329]

[0330] , that is, the second lens 112, the third lens 113, the fourth lens 114 of the first lens group 11, and the first lens 121, the second lens 122, the third lens 123 of the second lens group 12 can be designed. In this embodiment,

[0331]

[0332] The optical lens 10 of this embodiment is obtained according to the design parameters of the above lenses. The basic parameters of the optical lens 10 of this embodiment are shown in Table 21.

[0333] Table 21 Basic parameters of the optical lens 10 of the seventh embodiment

[0334] parameter Value parameter Value f1(mm) 7.79 f23(mm) 110.92 f2(mm) -9.92 f(mm) 16.61 f11(mm) 9.6 F#(mm) 3.2 f12(mm) -17.58 IH(mm) 4 f13(mm) 26.90 β 2.14 f14(mm) 15.18 |1-β^2| 3.57 f21(mm) -8.11 TTL(mm) 15.909 f22(mm) 877.02

[0335] Wherein, f23 is the focal length of the third lens 123 of the second lens group 12. It should be noted that in the present application, symbols such as f23 have the same meanings and will not be described again in the following.

[0336] In this embodiment, the total optical length of the optical lens 10 is 15.909 mm. In this embodiment, the distance d between the image side surface of the lens closest to the second lens group 12 in the first lens group 11 and the object side surface of the lens closest to the first lens group 11 in the second lens group 12 is the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121. In this embodiment, when the optical lens 10 is in a telephoto shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 1 mm; when the optical lens 10 is in a macro shooting state, the distance between the image side surface S16 of the third lens 113 and the object side surface S21 of the first lens 121 is 2.3 mm.

[0337] In this embodiment, the distance Δd that the second lens group 12 can move relative to the first lens group 11 is 1.3 mm. The application requirements of the optical lens 10 in different scenes can be met by moving a short distance, and the requirements for the driving structure for driving the second lens group 12 to move are relatively small. The ratio of the distance Δd that the second lens group 12 can move relative to the first lens group 11 to the total optical length TTL of the optical lens 10 is 0.08.

[0338] In this embodiment, the focal length ratio |f1 / f2| of the first lens group 11 and the second lens group 12 of the optical lens 10 is 0.79, the focal length ratio |f1 / f| of the first lens group 11 and the optical lens 10 is 0.47, and the focal length ratio |f2 / f| of the second lens group 12 and the optical lens 10 is 0.59. The focal lengths of the first lens group 11 and the second lens group 12 of the optical lens 10 can be reasonably allocated, so that the optical lens 10 can have a good imaging effect. And the second lens group 12 can cooperate with the first lens group 11 to correct the aberration of the optical lens 10, reduce the generation of distortion, and improve the imaging quality of the optical lens 10. Moreover, in the present embodiment, the absolute value of the focal length of the first lens group 11 is smaller than the absolute value of the focal length of the second lens group 12, that is, the refractive power of the first lens group 11 is stronger than that of the second lens group 12, the first lens group 11 has a stronger light adjustment ability, and the second lens group 12 has a smaller effect on light adjustment, thereby reducing the difference in the light adjustment effect of the optical lens 10 when the second lens group 12 moves between different positions, ensuring that when the second lens group 12 is moved to adjust the focal length of the optical lens 10 to achieve telephoto and macro photography, the imaging effect of the optical lens 10 can always be good.

[0339] In this embodiment, the focal length ratio of the first lens 111 in the first lens group 11 to the focal length of the second lens 112 is |f11 / f12|, which is 0.55. The focal lengths of the first lens 111 and the second lens 112 in the first lens group 11 can be reasonably distributed, so that the optical lens 10 can have a good imaging effect. In addition, in this embodiment, the focal power of the first lens 111 is smaller than the focal length of the second lens 112, that is, the first lens 111 can have a better light convergence effect, so as to converge more external light into the optical lens 10, increase the amount of light entering the optical lens 10, and make the optical lens 10 have a better imaging effect.

[0340] In the present embodiment, the ratio of the focal length of the first lens 121 of the second lens group 12 to the lens closest to the image side (i.e., the third lens 123) is |f21 / f2L| which is 0.07. The focal lengths of the first lens 121 of the second lens group 12 and the lens closest to the image side (i.e., the third lens 123) can be reasonably distributed, so that the second lens group 12 can have a better light adjustment effect, thereby enabling the second lens group 12 to achieve a better focal length adjustment effect, so as to move in the axial direction to achieve a better effect of adjusting the focal length of the optical lens 10, thereby ensuring that the optical lens 10 can have a better shooting effect when different usage requirements are met. Moreover, in the present embodiment, the absolute value of the focal length of the first lens 121 of the second lens group 12 is smaller than the absolute value of the focal length of the lens closest to the image side (i.e., the third lens 123), i.e., the first lens 121 of the second lens group 12 has a higher refractive degree. Therefore, during the axial movement of the second lens group 12, the light incident from the first lens group 11 to the second lens group 12 can be adjusted immediately after passing through the first lens 121, thereby ensuring that good adjustment can be achieved in different usage scenarios using as few lenses as possible, thereby ensuring that the optical lens 10 can have good imaging effects in different usage scenarios.

[0341] The focal length sensitivity |1-β^2| of the second lens group 12 is 3.57, wherein the ratio β of the incident angle to the exit angle of the light on the second lens group 12 is 2.14. In this embodiment, the focal length and light regulation capability of the second lens group 12 are within a suitable range, thereby achieving a better focal length adjustment effect, so that the optical lens 10 can achieve better imaging effects in different usage scenarios.

[0342] See also Fig.32 , Fig.33 and Fig.34 , Fig.32 The figure shows the vertical axis spherical aberration curve of light with wavelengths of 656 nm, 587 nm and 486 nm after passing through the optical lens 10 of the seventh embodiment. Fig.32 The vertical axis represents the actual image height in millimeters, and the horizontal axis represents the chromatic aberration in the vertical axis direction in millimeters. Fig.33 The figure shows the astigmatism field curvature diagram of light with a wavelength of 555 nm after passing through the optical lens 10 of the seventh embodiment. Fig.33 The vertical axis represents the field angle, in degrees (°), and the horizontal axis represents the astigmatism field curvature value of the optical lens 10, in millimeters (mm). The solid line represents the field curvature value of the light with a central wavelength (555nm) on the meridional image plane, and the dotted line represents the field curvature value of the light with a central wavelength (555nm) on the sagittal image plane. Fig.34 The figure shows the distortion of light with a wavelength of 555 nm passing through the optical lens 10 of the seventh embodiment. Fig.34 The ordinate represents the field of view angle, in degrees (°), and the abscissa represents the distortion value of light having a wavelength of 555 nm passing through the optical lens 10 of the seventh embodiment, in %. Fig.32 It can be seen from the figure that in this embodiment, the vertical axis spherical aberration of light of different wavelengths after passing through the optical lens 10 of this embodiment is also controlled within a relatively small range. Fig.33 It can be seen from the figure that the astigmatism field curvature of the light in the sagittal direction and the tangential direction after passing through the optical lens 10 of this embodiment is small, that is, the astigmatism field curvature of the imaging of the optical lens 10 of this embodiment is small. Fig.34 It can be seen that the light has a small distortion after passing through the optical lens 10 of this embodiment, that is, the imaging distortion of the optical lens 10 of this embodiment is small. Therefore, in this embodiment, the vertical axis spherical aberration, astigmatism field curvature and distortion of the light after passing through the optical lens 10 of this embodiment are small, that is, the optical lens 10 of this embodiment can achieve a good imaging effect.

[0343] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An optical lens, characterized in that: It comprises a first lens group and a second lens group arranged from the object side to the image side, and the first lens group and the second lens group are coaxially arranged; the first lens group and the second lens group each comprise a plurality of lenses, each of the lenses comprises an object side surface facing the object side and an image side surface facing the image side; the first lens group has positive optical power, and the second lens group has negative optical power; the second lens group can move axially relative to the first lens group, and the distance Δd that the second lens group can move relative to the first lens group satisfies: 1.08mm≤Δd≤4mm.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relationship: TTL≤25mm; wherein TTL is the total optical length of the optical lens.

3. The optical lens according to claim 1 or 2, characterized in that: The optical lens satisfies the following relationship: F#≥2; wherein F# is the aperture F value of the optical lens.

4. The optical lens according to any one of claims 1 to 3, characterized in that: The position of the first lens group is fixed.

5. The optical lens according to any one of claims 1 to 4, characterized in that: The lenses of the first lens group include a first lens and a second lens arranged in sequence from the object side to the image side, the first lens has a positive optical focal length, the second lens has a negative optical focal length, and the combined optical focal length of the other lenses of the first lens group except the first lens and the second lens is a positive optical focal length.

6. The optical lens according to any one of claims 1 to 5, characterized in that: The first lens closest to the object side in the second lens group is a meniscus lens, and the image side surface of the first lens is a concave surface.

7. The optical lens according to any one of claims 1 to 6, characterized in that: The first lens group includes 3 to 4 lenses, and the second lens group includes 2 to 3 of the lenses.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens satisfies the following relationship: 0.4<|f1 / f2|<1.1; wherein f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

9. The optical lens according to claim 8, characterized in that: The optical lens satisfies the following relationship: 0.4<|f1 / f2|<1; wherein f1 is the focal length of the first lens group, and f2 is the focal length of the second lens group.

10. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens satisfies the following relationship: 0.4<|f2 / f|<1; wherein f2 is the focal length of the second lens group, and f is the focal length of the first lens group and the second lens group of the optical lens when their positions are closest.

11. The optical lens according to any one of claims 1 to 10, characterized in that: The first lens group of the optical lens satisfies the following relationship: 0.2<|f11 / f12|<1.1; wherein f11 is the focal length of the first lens of the first lens group, and f12 is the focal length of the second lens of the first lens group.

12. The optical lens according to claim 11, characterized in that: The first lens group of the optical lens satisfies the following relationship: 0.2<|f11 / f12|<1; wherein f11 is the focal length of the first lens of the first lens group, and f12 is the focal length of the second lens of the first lens group.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The second lens group of the optical lens satisfies the following relationship: |f21 / f2L|<10; wherein f21 is the focal length of the first lens of the second lens group, and f2L is the focal length of the lens closest to the image side in the second lens group.

14. The optical lens according to claim 13, characterized in that: The second lens group of the optical lens satisfies the following relationship: |f21 / f2L|<1; wherein f21 is the focal length of the first lens of the second lens group, and f2L is the focal length of the lens closest to the image side in the second lens group.

15. The optical lens according to claims 1-14, characterized in that: The second lens group of the optical lens satisfies the following relationship: 1.4<|1-β^2|<3.8; wherein β is the ratio of the incident angle of light on the second lens group to the exit angle, and 1-β^2 is the focal length sensitivity of the second lens group.

16. The optical lens according to any one of claims 1 to 15, characterized in that: The lens closest to the object side in the first lens group is made of glass, and the lens closest to the object side in the first lens group is a spherical lens.

17. The optical lens according to any one of claims 1 to 16, characterized in that: The multiple lenses of the first lens group include at least four aspherical surfaces; and the lenses of the second lens group are all aspherical lenses.

18. The optical lens according to any one of claims 1 to 17, characterized in that: The optical lens further comprises an optical path deflecting element, which is arranged on a side of the first lens component away from the second lens component. After being folded by the optical path deflecting element, the light is emitted through the first lens component and the second lens component in sequence.

19. The optical lens according to claim 12, characterized in that: The first lens group of the optical lens satisfies the following relationship: 0.37<|f11 / f12|<1.

20. The optical lens according to claim 12, characterized in that: The first lens group of the optical lens satisfies the following relationship: 0.45<|f11 / f12|<1.

21. The optical lens according to claim 14, characterized in that: The second lens group of the optical lens satisfies the following relationship: 0.23≤|f21 / f2L|<1.

22. The optical lens according to claim 14, characterized in that: The second lens group of the optical lens satisfies the following relationship: 0.33≤|f21 / f2L|<1.

23. The optical lens according to claim 9, characterized in that: The optical lens satisfies the following relationship: 0.4<|f1 / f2|≤0.

88.

24. The optical lens according to claim 9, characterized in that: The optical lens satisfies the following relationship: 0.72≤|f1 / f2|<1.

25. The optical lens according to claim 10, characterized in that: The optical lens satisfies the following relationship: 0.4<|f2 / f|≤0.

86.

26. A camera module, characterized in that: It comprises a photosensitive element and an optical lens as described in any one of claims 1 to 25, wherein the photosensitive element is located on the image side of the optical lens, and light is projected onto the photosensitive element after passing through the optical lens; the distance between the first lens assembly and the photosensitive element remains unchanged, and the second lens assembly can move between the first lens assembly and the photosensitive element along the optical axis.

27. An electronic device, characterized in that: It includes an image processor and a camera module as described in claim 26, wherein the image processor is communicatively connected to the camera module, the camera module is used to acquire image data and input the image data into the image processor, and the image processor is used to process the image data output therein.

Images