Optical lens, camera module and electronic device

Abstract

The application provides an optical lens, a camera module and an electronic device, relates to the photographic and video shooting technical field, and is used for solving the problem of large volume of the existing camera module. The optical lens provided by the application comprises a first fixed lens group, a second fixed lens group, an anti-shake lens group and a focusing lens group arranged along the optical axis direction of the optical lens. At least one lens with optical power is contained in the first fixed lens group, the second fixed lens group, the anti-shake lens group and the focusing lens group. The second fixed lens group, the anti-shake lens group and the focusing lens group are located on the image side of the first fixed lens group, and at least one of the anti-shake lens group and the focusing lens group is located between the first fixed lens group and the second fixed lens group. The optical lens can reduce the volume of the camera module, is beneficial to the thinning of the electronic device. Moreover, the optical lens can also correct the distortion and the field curvature, and is beneficial to improving the imaging quality.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of photography and videography, and in particular to an optical lens, a camera module and an electronic device. BACKGROUND

[0002] With the increasing demand for electronic devices (such as mobile phones, tablets, smart watches, etc.) year by year, electronic devices have more and more functions. For example, electronic devices generally have a photography and videography function, and the implementation of this function is based on a camera module.

[0003] With the development of photography and videography technology, camera modules generally begin to have the functions of adjustable focal length and anti-shake, and thus can be applied to various shooting scenes. However, the existing camera modules are relatively large in size and occupy a large amount of space inside the electronic device, which is not conducive to the thinness of the electronic device. SUMMARY

[0004] Embodiments of the present application provide an optical lens, a camera module and an electronic device, to solve the problem of the large size of the existing camera module.

[0005] To achieve the above-mentioned purpose, embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, embodiments of the present application provide an optical lens, comprising a first fixed lens group, a second fixed lens group, an anti-shake lens group and a focusing lens group arranged along the optical axis direction of the optical lens.

[0007] Among the first fixed lens group, the second fixed lens group, the anti-shake lens group and the focusing lens group, at least one lens with optical power is included. The second fixed lens group, the anti-shake lens group and the focusing lens group are located on the image side of the first fixed lens group, and at least one of the anti-shake lens group and the focusing lens group is located between the first fixed lens group and the second fixed lens group.

[0008] The optical lens provided in the first aspect of the present application comprises a separate anti-shake lens group and a focusing lens group. When performing anti-shake compensation, the driving component only needs to drive the anti-shake lens group to move. When performing focusing, the driving component only needs to drive the anti-shake lens group to move. That is, compared with driving the entire optical lens to move, the driving force required for driving a single anti-shake lens group and a single focusing lens group is smaller, and the load requirement for the driving component is lower, that is, a smaller driving component can be used, thereby facilitating the reduction of the size of the camera module. In addition, the optical lens further comprises a first fixed lens group and a second fixed lens group. The first fixed lens group can converge light, thereby reducing the aperture of the first fixed lens group on the image side and other lens groups, and facilitating the reduction of the size of the optical lens. The second fixed lens group can compensate for the aberration of the optical lens to a certain extent, correct the distortion and field curvature, and improve the imaging quality.

[0009] In combination with the first aspect, in a possible implementation manner, the optical lens further comprises a light turning component, and the light turning component is located on the image side of the first fixed lens group. The light turning component can be a mirror or a reflecting prism. In this way, the light turning component can turn and fold the optical axis of the optical lens, that is, the light turning component can convert the thickness of the optical lens into a length, so that the optical lens can realize a long-focus effect while maintaining a small thickness, thereby facilitating the thinning of the electronic device.

[0010] In combination with the first aspect, in another possible implementation manner, the first fixed lens group comprises a reflecting prism and at least one lens with optical power. The first fixed lens group adopts the structure, and the reflecting prism can change the direction of light, for example, the optical lens can be applied to a periscopic camera module.

[0011] In combination with the first aspect, in another possible implementation manner, at least one of the anti-shake lens group, the focusing lens group and the second fixed lens group comprises a doublet. The doublet has small light energy loss and can correct spherical aberration, coma and chromatic aberration to a certain extent, thereby improving the imaging quality.

[0012] In combination with the first aspect, in another possible implementation manner, the optical lens further comprises an infrared filter, and the infrared filter is located on the image side of the last lens in the optical lens. The use of the infrared filter can effectively filter out infrared light and only allow visible light to enter, thereby improving the image quality and clarity. In addition, the infrared filter can prevent the generation of heat on the surface of the optical device by infrared light, thereby avoiding the influence of infrared light on the imaging quality and clarity.

[0013] With reference to the first aspect, in a possible implementation manner, the optical lens further includes a diaphragm, and the diaphragm is located on the object side of the first fixed lens group. Alternatively, the diaphragm extends around the object side surface of the first fixed lens group. In this way, the diaphragm is arranged to improve the imaging clarity, control the range of the imaging object space, and control the brightness of the image surface. Moreover, by adjusting the size of the diaphragm, a larger entrance pupil diameter can be obtained, so that a larger aperture and a diffraction limit value can be obtained under the condition that the focal length of the optical lens is unchanged, thereby improving the imaging quality of the optical lens.

[0014] With reference to the first aspect, in a possible implementation manner, the optical lens satisfies the following relationship: 0.4 < CT MAX / TTL < 0.7. Wherein, TTL is the total optical length of the optical lens along the extension direction of the optical axis of the optical lens. CT MAX is the maximum value of the distance between any two adjacent elements among the first fixed lens group, the second fixed lens group, the anti-shake lens group, and the focusing lens group along the extension direction of the optical axis of the optical lens.

[0015] The above relationship controls CT MAX / TTL to be higher than the lower limit value 0.4, so that there is enough space to install the light turning component between the two adjacent lens groups in the optical lens, thereby reducing the volume of the optical lens. CT MAX / TTL is less than the upper limit value 0.7, which is beneficial to guarantee the imaging quality of the optical system.

[0016] With reference to the first aspect, in a possible implementation manner, the optical lens satisfies the following relationship: 0.4 < EFL / TTL < 0.8. Wherein, EFL is the system focal length of the optical lens.

[0017] The above relationship limits the range of the ratio of the system focal length to the total length of the optical lens, which is beneficial to improve the resolving power of the optical lens.

[0018] With reference to the first aspect, in a possible implementation manner, the optical lens satisfies the following relationship: 3.1 < FNO < 4.5. Wherein, FNO is the aperture value of the optical lens.

[0019] The above relationship limits the aperture value range of the optical lens, which is beneficial to guarantee that the optical lens has higher imaging quality, smaller size, and better light performance.

[0020] With reference to the first aspect, in a possible implementation manner, the optical lens satisfies the following relationship: 0.1 < F1 / EFL < 1. Wherein, F1 is the focal length of the first fixed lens group.

[0021] The above relationship limits the range of the ratio of the focal length of the first fixed lens group to the focal length of the optical lens system, so as to reasonably distribute the refractive power of the first fixed lens group, control the path of light entering the first fixed lens group, and converge light, which is conducive to reducing the aperture size of the subsequent other lens groups.

[0022] In another possible implementation manner of the first aspect, the optical lens satisfies the following relationship: EFL AF / EFL < 0.6. Wherein, EFL AF is the focal length of the focusing lens group.

[0023] The above relationship limits the range of the ratio of the focal length of the focusing lens group to the focal length of the optical lens system, so as to reasonably distribute the refractive power of the focusing lens group, thereby reducing the stroke of the focusing lens group when focusing, and reducing the tolerance sensitivity of the focusing lens group.

[0024] In another possible implementation manner of the first aspect, the optical lens satisfies the following relationship: -4 < EFL OIS / EFL < 4. Wherein, EFL OIS is the focal length of the anti-shake lens group.

[0025] The above relationship limits the range of the ratio of the focal length of the anti-shake lens group to the focal length of the optical lens system, so as to reasonably distribute the refractive power of the anti-shake lens group, thereby reducing the moving stroke of the anti-shake lens group when performing anti-shake compensation, and reducing the tolerance sensitivity of the anti-shake lens group.

[0026] In another possible implementation manner of the first aspect, the optical lens satisfies the following relationship: 0.01 < CT AF / TTL < 0.2. Wherein, CT AF is the center thickness of the focusing lens group in the direction of the optical axis of the optical lens.

[0027] The above relationship limits the range of the ratio of the center thickness of the focusing lens group to the total optical length of the optical lens, which is conducive to reducing the overall length of the focusing lens group, i.e., reducing the size of the focusing lens group, thereby reducing the load of the voice coil motor and improving the service life and response speed of the voice coil motor.

[0028] In another possible implementation manner of the first aspect, the optical lens satisfies the following relationship: 0.01 < CT OIS / TTL < 0.2. Wherein, CT OIS is the center thickness of the anti-shake lens group in the direction of the optical axis of the optical lens.

[0029] The above relationship limits the ratio of the center thickness of the anti-shake lens group to the total optical length of the optical lens, which is beneficial to reduce the overall length of the anti-shake lens group, i.e., to reduce the size of the anti-shake lens group, and further to reduce the load of the driving component, and to improve the service life and response speed of the driving component.

[0030] In combination with the first aspect, in another possible implementation manner, the optical lens satisfies the following relationship: 2.5 < CT MAX / EPD < 4.5. Wherein, EPD is the entrance pupil diameter of the optical lens.

[0031] The above relationship limits the ratio of the maximum center distance between two adjacent lens groups in the optical lens to the entrance pupil diameter, so as to add a light turning component (such as a mirror, a reflecting prism, etc.) between the two lens groups, while the light amount of the optical lens can also be ensured.

[0032] The second aspect, the application provides a camera module, the camera module includes a substrate, an image sensor and the optical lens of the above-mentioned first aspect.

[0033] Wherein, the image sensor is arranged on the substrate, the image sensor has an imaging surface, the optical lens is electrically connected with the substrate, and the image side of the optical lens faces the imaging surface of the image sensor.

[0034] In combination with the second aspect, in a possible implementation manner, the optical lens satisfies the following relationship: 0.4 < CT MAX / TTL < 0.7. Wherein, TTL is the total optical length of the optical lens along the extension direction of the optical axis of the optical lens; CT MAX is the maximum value of the distance between any two adjacent elements among the five elements of the first fixed lens group, the second fixed lens group, the anti-shake lens group, the focusing lens group and the image sensor along the extension direction of the optical axis of the optical lens.

[0035] In combination with the second aspect, in another possible implementation manner, the optical lens satisfies the following relationship: 2.5 < CT MAX / EPD < 4.5. Wherein, EPD is the entrance pupil diameter of the optical lens; CT MAX is the maximum value of the distance between any two adjacent elements among the five elements of the first fixed lens group, the second fixed lens group, the anti-shake lens group, the focusing lens group and the image sensor along the extension direction of the optical axis of the optical lens.

[0036] It can be understood that the beneficial effects that can be achieved by the camera module provided in the second aspect and any possible implementation manner thereof can be referred to the beneficial effects in the first aspect and any possible implementation manner thereof, which will not be described herein again.

[0037] In a third aspect, the present application provides an electronic device, comprising a shell, a mainboard and the camera module of the second aspect. The mainboard and the camera module are both arranged in the shell, and the camera module is electrically connected with the mainboard.

[0038] It can be understood that the electronic device provided in the third aspect and any possible implementation manner thereof can achieve the beneficial effects as described in the first aspect and any possible implementation manner thereof, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The overall structural schematic diagram of the electronic device provided in the present application is shown in the figure;

[0040] Figure 2 The structural explosion diagram of the electronic device is shown in the figure; Figure 1

[0041] Figure 3 The structural schematic diagram of the camera module provided in the present application is shown in the figure;

[0042] Figure 4 The structural explosion diagram of the camera module is shown in the figure; Figure 3

[0043] The relative position schematic diagram of the lens module and the image sensor is shown in the figure; Figure 5

[0044] Figure 6 The structural schematic diagram of the optical lens provided in the present application is shown in the figure;

[0045] Figure 7 The structural schematic diagram of another optical lens provided in the present application is shown in the figure;

[0046] Figure 8 The structural schematic diagram of another optical lens provided in the present application is shown in the figure;

[0047] Figure 9 The structural schematic diagram of another optical lens provided in the present application is shown in the figure;

[0048] Figure 10 The structural schematic diagram of another optical lens provided in the present application is shown in the figure;

[0049] Figure 11 The structural schematic diagram of another optical lens provided in the present application is shown in the figure;

[0050] Figure 12 The structural schematic diagram of the optical lens provided in example one is shown in the figure;

[0051] Figure 13 ​​Astigmatism field curve for light rays after passing through the optical lens in Example One;

[0052] Figure 14 Distortion curve for light rays after passing through the optical lens in Example One;

[0053] Figure 15 Structural schematic of the optical lens provided in Example Two;

[0054] Figure 16 Astigmatism field curve for light rays after passing through the optical lens in Example Two;

[0055] Figure 17 Distortion curve for light rays after passing through the optical lens in Example Two;

[0056] Figure 18 Astigmatism field curve for light rays after passing through the optical lens in Example Three;

[0057] Figure 19 Distortion curve for light rays after passing through the optical lens in Example Three;

[0058] Figure 20 Astigmatism field curve for light rays after passing through the optical lens in Example Four;

[0059] Figure 21 Distortion curve for light rays after passing through the optical lens in Example Four;

[0060] Figure 22 Structural schematic of the optical lens provided in Example Five;

[0061] Figure 23 Astigmatism field curve for light rays after passing through the optical lens in Example Five;

[0062] Figure 24 Distortion curve for light rays after passing through the optical lens in Example Five;

[0063] Figure 25 Structural schematic of the optical lens provided in Example Six;

[0064] Figure 26 Astigmatism field curve for light rays after passing through the optical lens in Example Six;

[0065] Figure 27 Distortion curve for light rays after passing through the optical lens in Example Six.

[0066] Reference Signs:

[0067] 01, Electronic device; 10, Display module; 11, Light-transmitting cover plate; 12, Display screen; 20, Housing; 21, Rear cover; 22, Bezel; 30, Camera module; 31, Substrate; 32, Image sensor; 32a, Imaging surface; 33, Flexible circuit board; 34, Lens module; 35, Housing; 36, Optical lens; 360, Optical axis; 361, First fixed lens group; 362, Second fixed lens group; 363, Anti-shake lens group; 364, Focusing lens group; 365, Light turning component; 365a, First light turning component; 365b, Second light turning component; 3651, First mirror; 3652, Second mirror; 3653, Reflecting prism; 366, Infrared filter; 36a, First lens; 36b, Second lens; 36c, Third lens; 36d, Fourth lens; 36e, Fifth lens; 36f, Sixth lens; 36g, Seventh lens; 36h, Eighth lens; 36i, Ninth lens; 40, Mainboard; 50, Camera decoration cover. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical scheme and advantages of the application clearer, the application will be further described in detail below with examples. It should be understood that the specific examples described herein are only used to explain the application, and are not used to limit the application.

[0069] In the description of the application, it should be clear that the terms "vertical", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application, and do not mean that the device or element referred to must have a specific orientation or position, and therefore cannot be understood as a limitation on the application. The "number" cannot be understood as a limitation on the application.

[0070] In the description of the application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0071] For the convenience of understanding, the technical terms involved in the application will be explained and described below.

[0072] The object side and the object side surface are the side where the object is located, and the surface of the lens / lens group close to the object side can be called the object side surface.

[0073] Image side and image side surface, the side where the image of the object is located is called the image side, and the surface of the lens / lens group close to the image side can be called the image side surface.

[0074] Focal length, also known as focal length, is a way to measure the convergence or divergence of light in an optical system, which refers to the vertical distance from the optical center of the lens or lens group to the focal plane when the infinite scene passes through the lens or lens group to form a clear image on the focal plane. From a practical point of view, it can be understood as the distance from the lens center to the film plane. For a fixed-focus lens, the position of the optical center is fixed; for a zoom lens, the change of the optical center of the lens brings the change of the focal length of the lens.

[0075] Aperture, which is used to control the amount of light passing through the lens into the body imaging surface, is usually in the lens. The size of the aperture is expressed by F / number.

[0076] Aperture F value, which is the relative value of lens focal length / lens aperture diameter (the reciprocal of relative aperture). The smaller the aperture F value, the more light will enter in the same unit of time. The larger the aperture F value, the smaller the depth of field, and the background content of the photograph will be blurred, similar to the effect of a long focal length lens.

[0077] Optical power, equal to the difference between the convergence degree of the image beam and the convergence degree of the object beam, which represents the ability of the optical system to deflect light. When the refractive index of air is approximately 1, the general optical power is expressed as the reciprocal of the image focal length.

[0078] Total track length (TTL), which refers to the total length from the center of the first lens on the object side to the center of the last lens on the image side, is the main factor in determining the height of the camera module.

[0079] Optical axis, the direction of the optical system to conduct light, refers to the chief ray of the central field of view. For a symmetric transmission system, it generally coincides with the center line of rotation of the optical system.

[0080] Entrance pupil, the common entrance of light beams emitted by all points on the object plane.

[0081] Entrance pupil diameter, the effective aperture that limits the incident light beam.

[0082] Field curvature, also known as image field curvature, is a phenomenon in optical systems. When the lens has field curvature, the intersection of the entire light beam does not coincide with the ideal image point. Although a clear image point can be obtained at each specific point, the entire image plane is a curved surface. This makes it difficult to see the entire image plane at the same time during inspection, causing difficulties in observation and photography.

[0083] Distortion, also known as distortion, the degree of distortion of the image of an optical system relative to the object itself. Distortion is due to the influence of the stop spherical aberration, the chief ray of different field of view through the optical system after the intersection height of the Gaussian image plane is not equal to the ideal image height, the difference between the two is the distortion. Therefore, distortion only changes the imaging position of the off-axis object point on the ideal surface, which causes the shape of the image to be distorted, but does not affect the sharpness of the image.

[0084] Double-cemented lens, double-cemented lens is a lens obtained by cementing two lenses together. The curvature radii of the cemented surfaces of the two lenses are equal, or one of the surfaces is a plane. This combined lens formed by two lenses is an effective method to achieve short focal length, large magnification and better imaging quality.

[0085] Long focal length lens, also known as telephoto lens, telephoto lens. In the process of shooting distant objects, long focal length lens is needed, which can well represent the details of distant scenes and shoot some shooting bodies that are not easy to approach. Especially in wildlife photography, a suitable long focal length lens can provide many creative opportunities for photography enthusiasts. However, long focal length lenses require a large axial space for system light path adjustment due to their large focal length, which results in an excessively long total length of the lens, making it difficult to miniaturize the lens, and thus unable to meet the development trend of mobile electronic devices towards thinness.

[0086] Therefore, the electronic device provided in the embodiments of the present application can be a portable electronic device or other types of electronic devices. For example, the electronic device can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a monitor, a camera, a personal computer, a notebook computer, a wearable device, etc. For the convenience of description, the electronic device is taken as a mobile phone as an example in the following description.

[0087] Please refer to Figure 1 and Figure 2 , Figure 1 the overall structure schematic diagram of the electronic device 01 provided in the embodiments of the present application, Figure 2 the structure explosion diagram of the electronic device 01 in the above Figure 1 It can be known from the above that in the present embodiment, the electronic device 01 is a mobile phone, and the electronic device 01 can have an approximately rectangular plate structure. The electronic device 01 can include a display module 10, a housing 20, a camera module 30, a mainboard 40, and a camera decoration cover 50.

[0088] For the convenience of the following description, an XYZ coordinate system is established, and the width direction of the electronic device 01 is defined as the X-axis direction, the length direction of the electronic device 01 is defined as the Y-axis direction, and the thickness direction of the electronic device 01 is defined as the Z-axis direction. Therefore, the present application does not specially limit this. It can be understood that, Figure 1 and Figure 2 Only some components included in the electronic device 10 are schematically shown, and the actual shape, actual size, actual position and actual structure of these components are not limited by Figure 1 and Figure 2 In other examples, the electronic device 10 can not include the camera decoration cover 50.

[0089] The display module 10 described above is used to display images, videos, etc. The display module 10 can include a light-transmitting cover plate 11 and a display screen 12 (English name: panel, also known as display panel), and the light-transmitting cover plate 11 and the display screen 12 are stacked. The material of the light-transmitting cover plate 11 includes but is not limited to glass. For example, the light-transmitting cover plate 11 can adopt a common light-transmitting cover plate, which is used to protect the display screen to avoid damage of the display screen caused by external force, and can also play a dustproof role. Alternatively, the light-transmitting cover plate 11 can also adopt a light-transmitting cover plate with touch function, so that the electronic device 01 has touch function, thereby making the user use more conveniently. Therefore, the present application does not specially limit the specific material of the light-transmitting cover plate 11.

[0090] In addition, the display screen 12 described above can adopt a flexible display screen or a rigid display screen. For example, the display screen 12 described above can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini light-emitting diode display screen, a micro light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light-emitting diode (QLED) display screen, a liquid crystal display (LCD), etc.

[0091] The shell 20 is used to protect the electronic devices inside the electronic device 01. The shell 20 can include a back cover 21 and a frame 22. The back cover 21 is located on the side of the display screen 12 away from the light-transmitting cover plate 11 and is stacked with the light-transmitting cover plate 11 and the display screen 12. The frame 22 is located between the light-transmitting cover plate 11 and the back cover 21. The frame 22 is fixed to the back cover 21. The light-transmitting cover plate 11 is fixed to the frame 22, so that the light-transmitting cover plate 11, the back cover 21 and the frame 22 form a containing cavity inside the electronic device 01. The display screen 12, the mainboard 40 and the camera module 30 are all arranged in the internal containing space.

[0092] The mainboard 40 is used to arrange electronic components of the electronic device 10 and realize electrical connection between the electronic components. For example, the electronic components can be a control chip (such as a system on chip, SOC), a graphics processing unit (GPU), a universal flash storage (UFS), a receiver, a flash module, and the camera module 30.

[0093] The camera module 30 is used to realize video or picture shooting. The structure of the camera module 30 can include a vertical type and a periscope type. For example, as shown in Figure 3 and Figure 4 , and Figure 3 is a structural schematic diagram of a camera module 30 provided by an embodiment of the present application. Figure 4 is Figure 3 an exploded view of the camera module 30 in

[0094] The camera module 30 can include a substrate 31, an image sensor 32, a lens module 34 and a housing 35. The housing 35 is fixed to the substrate 31, and the lens module 34 is located in the housing 35 and electrically connected to the substrate 31. The image sensor 32 is arranged on the substrate 31, and the image sensor 32 has an imaging surface 32a. One end of a flexible printed circuit 33 (FPC) is electrically connected to the substrate 31, and the other end of the flexible printed circuit 33 is used to electrically connect to the mainboard 40.

[0095] For example, the camera module 30 can be a telephoto camera, that is, the lens module 34 thereof is a telephoto lens with a focal length greater than that of a standard lens. Therefore, the camera module 30 can shoot distant objects or scenes, making the shooting scene of the electronic device 01 more extensive and improving the user experience.

[0096] The camera module 30 has an object-side side and an image-side side. The object-side side can be the object-side side of the lens module 34 inside the camera module 30, and the image-side side can be the image-side side of the lens module 34 inside the camera module 30. The object-side side of the lens module 34 faces the rear cover 21, and the image-side side of the lens module 34 faces the imaging surface 32a of the image sensor 32. A mounting notch is provided on the rear cover 21. Figure 2 (not shown in the image), the aforementioned camera decorative cover 50 (as shown in the image). Figure 2 As shown, the camera decorative cover 50 is fixed within the mounting notch and has a light-transmitting window. The object-side surface of the lens module 34 faces the light-transmitting window, allowing external light to pass through the window, enter the lens module 34 from the object-side surface, and then exit from the image-side surface to illuminate the image sensor 32. The image sensor 32 then converts the received light signal into a digital signal, outputs it to a digital signal processor (DSP) for image signal enhancement and compression optimization, and finally transmits it to... Figure 2 The image is displayed on the screen 12 shown.

[0097] It should be noted that in the aforementioned camera module 30, the optical axis of the lens module 34 ( Figure 4 The dashed line in the image can be parallel to the thickness direction (i.e., the Z-axis direction) of the electronic device 01. The distribution direction of the substrate 31 and the flexible circuit board 33 can be parallel to the width direction (i.e., the X-axis direction) of the electronic device 01. The direction perpendicular to the above two directions in the camera module 30 is parallel to the length direction (i.e., the Y-axis direction) of the electronic device 01. It is understood that the above-described arrangement of the camera module 30 is only one example, that is, the camera module 30 can also be arranged in other ways within the housing of the electronic device 01.

[0098] Furthermore, the camera module 30 of the aforementioned electronic device 01 can also achieve autofocus (AF) and optical image stabilization (OIS), thereby enabling the camera module 30 to be suitable for various shooting scenarios. Specifically, the camera module 30 may also include a driving component ( Figure 4 (Not shown in the image), the drive component is housed within the housing 35. For example, the drive component can be a voice coil motor (VCM).

[0099] The drive unit is connected to the lens module 34. See also... Figure 5 As shown, Figure 5A schematic view of the relative position of the lens module 34 and the image sensor 32 (parallel to the XZ plane) is shown. The driving component can drive the lens module 34 to move along the Z-axis direction, so as to adjust the distance between the lens module 34 and the imaging surface 32a of the image sensor 32, focus the light rays emitted from the lens module 34 on the imaging surface 32a, and realize automatic focusing. The driving component can also drive the lens module 34 to move along a direction perpendicular to the Z-axis (i.e., parallel to the XY plane), so as to compensate for the shaking during shooting, and thus realize optical image stabilization.

[0100] However, when focusing, the driving component drives the entire lens module 34 to move along the Z-axis direction, which requires a large rated load of the driving component. In order to meet the load requirement, a driving component with a large size is generally used, which further increases the volume of the camera module 30 and is not conducive to the thinning of the electronic device 01.

[0101] Similarly, when compensating for the shake, the driving component drives the entire lens module 34 to move along a direction perpendicular to the Z-axis (parallel to the XY plane), which requires a large rated load of the driving component. In order to meet the load requirement, a driving component with a large size is generally used, which further increases the volume of the camera module 30 and is not conducive to the thinning of the electronic device 01.

[0102] In addition, since the long focal length lens has a large volume, the driving component of the camera module 30 needs to have a large stroke when the lens module 34 focuses, which further increases the overall volume of the camera module 30 and affects the focusing accuracy, and thus affects the performance of the camera module 30.

[0103] To solve the above problems, an optical lens 36 is provided in the embodiments of the present application, which can be applied to the camera module 30 described above. Please refer to Figure 6 as shown, Figure 6 A structural schematic view of the optical lens 36 provided in the embodiments of the present application (parallel to the XZ plane) is shown. The optical lens 36 includes a first fixed lens group 361, a second fixed lens group 362, an anti-shake lens group 363, and a focusing lens group 364 arranged along the optical axis 360 of the optical lens 36.

[0104] Among them, the second fixed lens group 362, the anti-shake lens group 363, and the focusing lens group 364 are located on the image side of the first fixed lens group 361, and at least one of the anti-shake lens group 363 and the focusing lens group 364 is located between the first fixed lens group 361 and the second fixed lens group 362. For example Figure 6 In the first fixed lens group 361, the anti-shake lens group 363, the focusing lens group 364, and the second fixed lens group 362 are arranged in sequence along the optical axis 360 of the optical lens 36.

[0105] Furthermore, the first fixed lens group 361 includes at least one lens with optical power. The second fixed lens group 362 includes at least one lens with optical power. The image stabilization lens group 363 includes at least one lens with optical power. The focusing lens group 364 includes at least one lens with optical power. Thus, the lenses of the optical lens 36 are divided into multiple lens groups for achieving different functions.

[0106] In this way, by setting up separate image stabilization lens group 363 and focusing lens group 364, the driving component only needs to move the image stabilization lens group 363 during image stabilization compensation and the focusing component only needs to move the image stabilization lens group 363 during focusing. That is, compared to moving the entire optical lens 36, the driving force required to drive a single image stabilization lens group 363 and a single focusing lens group 364 is less, thus placing a lower load on the driving component. This means that a smaller driving component can be used, which helps to reduce the size of the camera module 30.

[0107] In addition, the optical lens 36 also includes a first fixed lens group 361 and a second fixed lens group 362. The first fixed lens group 361 can concentrate light rays, thereby reducing the aperture of other lens groups on the image side of the first fixed lens group 361, which helps to reduce the size of the optical lens 36. The second fixed lens group 362 can compensate for aberrations of the optical lens 36 to a certain extent, correct its distortion and field curvature, which helps to improve image quality.

[0108] In some possible implementations, please continue to refer to Figure 6 As shown. The first fixed lens group 361 can be composed of multiple lenses spaced apart, at least one of which has optical power. For example, Figure 6 The first fixed lens group 361 includes a first lens 36a and a second lens 36b, both of which have optical power. The first lens 36a and the second lens 36b can be used to converge light rays, that is, the optical axis 360 of the optical lens 36 extends in one direction, so that the optical lens 36 can be applied to the vertical camera module 30.

[0109] For some possible implementations, please refer to Figure 7 As shown, Figure 7 This is a schematic diagram (parallel to the XZ plane) of another optical lens 36 provided in an embodiment of this application. The first fixed lens group 361 may include a reflecting prism 3653 and at least one lens with optical power. For example, Figure 7The first fixed lens group 361 includes a first lens 36a, a second lens 36b, and a reflecting prism 3653. Both the first lens 36a and the second lens 36b have optical power. The first lens 36a is located on the object side of the reflecting prism 3653, and the second lens 36b is located on the image side of the reflecting prism 3653. With this structure, the first fixed lens group 361 uses the first lens 36a to concentrate light, while the reflecting prism 3653 enables the first fixed lens group 361 to change the direction of light propagation. That is, the optical axis 360 of the optical lens 36 is changed by the reflecting prism 3653, allowing the optical lens 36 to be used in a periscope camera module 30. The second lens 36b further concentrates the light reflected by the reflecting prism 3653.

[0110] The subsequent lens groups can further refract the light, thereby further adjusting the propagation path of the light to concentrate the light, which helps to reduce the size of the subsequent lens groups.

[0111] In some possible implementations, at least one of the image stabilization lens group 363, the focusing lens group 364, and the second fixed lens group 362 contains a cemented doublet lens. For example, see below. Figure 7 As shown, Figure 7 The focusing lens group 364 consists of two lenses: a third lens 36c and a fourth lens 36d. The image-side surface of the third lens 36c and the object-side surface of the fourth lens 36d are both spherical with equal radii of curvature. The image-side surface of the third lens 36c and the object-side surface of the fourth lens 36d are bonded together with a light-transmitting adhesive. This design minimizes light energy loss when light passes through the cemented doublet lens, and the cemented doublet lens can also correct spherical aberration, coma, and chromatic aberration to a certain extent, thereby improving image quality.

[0112] To further reduce the size of the optical lens 36, please refer to Figure 8 As shown, Figure 8 This is a schematic diagram of another optical lens 36 provided in an embodiment of this application (parallel to the XZ plane). The optical lens 36 may further include a light-deflecting component 365. The light-deflecting component 365 is located on the image side of the first fixed lens group 361. In this way, the light-deflecting component 365 can bend and fold the optical axis 360 of the optical lens 36. That is, the light-deflecting component 365 can convert the thickness of the optical lens 36 along the Z-axis into a length parallel to the XY plane, allowing the optical lens 36 to achieve a telephoto effect while maintaining a relatively small thickness, which is beneficial for the thinning and lightening of the electronic device 01.

[0113] It is understandable that the light deflection component 365 can be set as one or multiple components can be set in the optical path of the optical lens 36. The appropriate component can be selected according to actual needs. This allows for more flexible setting of the relative positions of the first fixed lens group 361, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32 (i.e., the imaging surface 32a), thereby increasing the applicable scenarios of the optical lens 36.

[0114] The light-deflecting component 365 can be a reflector, a reflecting prism, etc., and this application does not make any special limitations on it.

[0115] For example, please continue to see Figure 8 As shown, Figure 8 The optical lens in the above is equivalent to the one mentioned above. Figure 6 A light-deflecting component 365 is added to the optical lens. The light-deflecting component 365 is a reflecting prism and is located on the object side of the first fixed lens group 361. Light rays enter the light-deflecting component 365 along the Z-axis, and after being reflected by the light-deflecting component 365, they enter the first fixed lens group 361 along the X-axis.

[0116] For example, please see Figure 9 As shown, Figure 9 A schematic diagram of the structure of another optical lens 36 provided in this application embodiment (parallel to the XZ plane). Figure 9 The optical lens in the above is equivalent to the one mentioned above. Figure 6 A light-deflecting component 365 is added to the optical lens. This component is located between the image-stabilizing lens group 363 and the focusing lens group 364, and consists of a first mirror 3651 and a second mirror 3652. Light rays emitted from the image-stabilizing lens group 363 are first reflected by the first mirror 3651 to the second mirror 3652, and then reflected by the second mirror 3652 to the focusing lens group 364.

[0117] For example, please see Figure 10 As shown, Figure 10 This is a schematic diagram of the structure of another optical lens 36 provided in an embodiment of this application. Figure 10 The optical lens in the above is equivalent to the one mentioned above. Figure 7 A light-deflecting component 365 is added to the optical lens. The light-deflecting component 365 consists of a first mirror 3651 and a second mirror 3652, and is located between the image stabilizing lens group 363 and the focusing lens group 364.

[0118] Light rays enter the first lens 36a of the first fixed lens group 361 along the Z-axis direction, and then, after being reflected by the reflecting prism 3653, travel along the X-axis direction from the second lens 36b to the first reflector 3651 of the light-transforming component 365. After being reflected by the first reflector 3651 to the second reflector 3652, and then reflected by the second reflector 3652, travel along the Y-axis direction to the third lens 36c of the focusing lens group 364.

[0119] For example, please see Figure 11 As shown, Figure 11 This is a schematic diagram of the structure of another optical lens 36 provided in an embodiment of this application. Figure 11 The optical lens in the above is equivalent to the one mentioned above. Figure 6 Based on the optical lens, two light-reflecting components 365 are added, namely the first light-reflecting component 365a and the second light-reflecting component 365b. The first light-reflecting component 365a is a reflecting prism, located on the object side of the first fixed lens group 361. The second light-reflecting component 365b consists of the first mirror 3651 and the second mirror 3652, and is located between the image stabilizing lens group 363 and the focusing lens group 364.

[0120] Light rays enter the first light-reflecting component 365a along the Z-axis. After being reflected by the first light-reflecting component 365a, they enter the first fixed lens group 361 along the X-axis, and are then refracted by the first fixed lens group 361 into the image-stabilizing lens group 363. The light rays emitted from the image-stabilizing lens group 363 are first reflected by the first mirror 3651 of the second light-reflecting component 365b onto the second mirror 3652, and then reflected by the second mirror 3652 into the focusing lens group 364 along the Z-axis.

[0121] In some possible implementations, please continue to refer to Figure 6 to Figure 11 As shown. The optical lens 36 may also include an infrared filter 366. The infrared filter 366 is located on the image side of the last lens in the optical lens 36. For example, Figure 10 A mid-infrared filter 366 is located between the second fixed lens group 362 and the imaging surface 32a. Using the infrared filter 366 effectively filters out infrared light, allowing only visible light to enter the imaging surface 32a, thereby improving image quality and clarity. Furthermore, it prevents infrared light from generating heat on the imaging surface 32a, thus avoiding any impact on image quality and clarity from infrared light.

[0122] In some possible implementations, the optical lens 36 may also include an aperture stop ( Figure 6 to Figure 11(Not shown in the image). The aperture stop can be located on the object side of the first fixed lens group 361. Alternatively, the aperture stop can extend around the object side of the first fixed lens group 361, for example, the aperture stop is at the edge of the object side of the first lens 36a in the first fixed lens group 361. With this configuration, the sharpness of the image can be improved, the range of the image object space can be controlled, and the brightness of the image plane can be controlled. Furthermore, by adjusting the size of the aperture stop, a larger entrance pupil diameter can be obtained, thereby achieving a larger aperture and diffraction limit without changing the focal length of the optical lens 36, which is beneficial for improving the image quality of the optical lens 36.

[0123] In some possible implementations, the optical lens 36 satisfies the following relationship: 0.4 < CT MAX / TTL < 0.7. For example, CT MAX The value of / TTL can be 0.41, 0.43, 0.45, 0.46, 0.471, 0.48, 0.5, 0.511, 0.526, 0.532, 0.54, 0.542, 0.551, 0.56, 0.57, 0.59, 0.6, 0.62, 0.621, 0.65, 0.68, 0.683, 0.692, etc.

[0124] Where TTL stands for the total optical length of the 3636 optical lens. CT MAX It is the maximum value of the distance between any two adjacent elements in the five elements of the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32, along the direction of extension of the optical axis 360 of the optical lens 36.

[0125] The above relationship is achieved by controlling the CT scan. MAX A / TTL value higher than the lower limit of 0.4 ensures sufficient space between adjacent lens groups in the optical lens 36 for installing the light deflector 365. (Controlling CT) MAX A / TTL value less than the upper limit of 0.8 is beneficial to ensuring the imaging quality of the optical system.

[0126] In some possible implementations, the optical lens 36 also satisfies the following relationship: 0.4 < EFL / TTL < 0.8. For example, the value of EFL / TTL can be 0.41, 0.45, 0.485, 0.51, 0.52, 0.526, 0.531, 0.535, 0.54, 0.57, 0.58, 0.595, 0.6, 0.61, 0.65, 0.68, 0.691, 0.7, 0.705, 0.71, 0.73, 0.75, 0.77, 0.78, 0.795, etc.

[0127] Where EFL is the system focal length of optical lens 36. The above relationship limits the range of the ratio of system focal length to total length of optical lens 36, which is beneficial to improving the resolving power of optical lens 36.

[0128] In some possible implementations, the optical lens 36 also satisfies the following relationship: 3.1 < FNO < 4.5. For example, the value of FNO can be 3.2, 3.22, 3.28, 3.35, 3.4, 3.43, 3.46, 3.5, 3.59, 3.6, 3.67, 3.72, 3.77, 3.82, 3.9, 3.98, 4, 4.1, 4.2, 4.3, 4.31, 4.4, 4.45, 4.49, etc. Where FNO is the aperture value of the optical lens 36.

[0129] The above relationship limits the aperture value range of the optical lens 36, which helps to ensure that the optical lens 36 has high imaging quality while also having a small size and good light intake performance.

[0130] In some possible implementations, the optical lens 36 satisfies the following relationship: 0.1 < F1 / EFL < 1. For example, the value of f1 / EFL can be 0.11, 0.132, 0.153, 0.16, 0.167, 0.2, 0.241, 0.25, 0.27, 0.3, 0.35, 0.4, 0.41, 0.42, 0.43, 0.452, 0.475, 0.59, 0.61, 0.7, 0.71, 0.75, 0.8, 0.802, 0.85, 0.89, 0.9, 0.91, 0.94, 0.971, 0.988, etc. Where F1 is the focal length of the first fixed lens group 361.

[0131] The above relationship limits the range of the ratio between the focal length of the first fixed lens group 361 and the focal length of the optical lens 36 system, thereby reasonably allocating the optical power of the first fixed lens group 361, making it easier to control the direction of light after entering the first fixed lens group 361 and to converge the light, which is beneficial to reducing the aperture size of subsequent lens groups.

[0132] In some possible implementations, the optical lens 36 also satisfies the following relationship: EFL AF / EFL < 0.6. For example, EFL AF The value of / EFL can be 0.05, 0.1, 0.13, 0.157, 0.18, 0.2, 0.22, 0.28, 0.291, 0.3, 0.311, 0.335, 0.4, 0.42, 0.45, 0.5, 0.53, 0.543, 0.57, 0.59, etc. Among them, EFL... AF This is the focal length of the focusing lens group 364.

[0133] The above relationship limits the range of the ratio between the focal length of the focusing lens group 364 and the focal length of the optical lens system 36, thereby reasonably allocating the optical power of the focusing lens group 364, which can reduce the travel of the focusing lens group 364 when moving to focus, and also reduce the tolerance sensitivity of the focusing lens group 364.

[0134] In some possible implementations, the optical lens 36 also satisfies the following relationship: -4 < EFL OIS / EFL < 4. For example, EFL OIS The / EFL value can be -3.9, -3.65, -3.1, -2.85, -2.3, -2.11, -2, -1.9, -1.8, -1.5, -1.4, -1.22, -1.1, -1.069, -1, -0.9, -0.787, -0.712, -0.5, 0, 0.5, 0.8, 1, 1.254, 1.456, 1.6, 1.8, 1.85, 1.9, 2, 2.11, 2.3, 2.85, 3.1, 3.65, 3.95, etc. Among them, EFL... OIS The focal length of the image-stabilized lens group is 363.

[0135] The above relationship limits the range of the ratio between the focal length of the image stabilization lens group 363 and the focal length of the optical lens system 36, thereby reasonably allocating the optical power of the image stabilization lens group 363, which can reduce the movement of the image stabilization lens group 363 when performing image stabilization compensation, and also reduce the tolerance sensitivity of the image stabilization lens group 363.

[0136] In some possible implementations, the optical lens 36 also satisfies the following relationship: 0.01 < CT AF / TTL < 0.2. For example, CT AF The / TTL value can be 0.02, 0.04, 0.05, 0.06, 0.08, 0.09, 0.1, 0.115, 0.122, 0.131, 0.135, 0.138, 0.14, 0.142, 0.144, 0.15, 0.156, 0.159, 0.16, 0.168, 0.17, 0.174, 0.179, 0.194, etc. Among them, CT... AF The center thickness of the focusing lens group 364 is located along the optical axis 360 of the optical lens 36.

[0137] The above relationship limits the range of the ratio between the center thickness of the focusing lens group 364 and the total optical length of the optical lens 36, which is beneficial to reduce the overall length of the focusing lens group 364, that is, to reduce the size of the focusing lens group 364, thereby reducing the load on the voice coil motor and improving the life and response speed of the voice coil motor.

[0138] In some possible implementations, the optical lens 36 also satisfies the following relationship: 0.01 < CT OIS / TTL < 0.2. For example, CT OIS The / TTL value can be 0.015, 0.02, 0.03, 0.049, 0.05, 0.06, 0.08, 0.089, 0.95, 0.1, 0.117, 0.126, 0.13, 0.135, 0.138, 0.14, 0.1491, 0.1495, 0.151, 0.156, 0.159, 0.165, 0.169, 0.17, 0.173, 0.179, 0.18, 0.19, etc. Among them, CT... OIS The center thickness of the image stabilization lens group 363 in the direction of the extended optical axis 360 of the optical lens 36.

[0139] The above relationship limits the range of the ratio between the center thickness of the image stabilization lens group 363 and the total optical length of the optical lens 36, which is beneficial to reduce the overall length of the image stabilization lens group 363, that is, to reduce the size of the image stabilization lens group 363, thereby reducing the load on the drive components and improving the lifespan and response speed of the drive components.

[0140] In some possible implementations, the optical lens 36 also satisfies the following relationship: 2.5 < CT MAX / EPD < 4.5. For example, CT MAX The / EPD value can be 2.53, 2.6, 2.65, 2.683, 2.7, 2.75, 2.8, 2.917, 3, 3.1, 3.128, 3.22, 3.24, 3.255, 3.27, 2.29, 3.3, 3.311, 3.324, 3.34, 3.36, 3.365, 3.38, 3.4, 3.422, 3.45, 3.8, 4, 4.15, 4.34, 4.49, etc. Here, EPD represents the entrance pupil diameter of the optical lens 36.

[0141] The above relationship limits the range of the ratio of the maximum center distance between two adjacent lens groups in the optical lens 36 to the entrance pupil diameter, so as to add a light deflection component 365 (such as a mirror, a reflecting prism, etc.) between the two lens groups, thereby further reducing the size of the optical lens 36.

[0142] It is understandable that the aforementioned center thickness and the distance between two adjacent lens groups are based on the point through which the optical axis 360 passes. That is, the distance through which the optical axis 360 passes through the lens group is the center thickness of the lens group, and the length of the optical axis 360 between two adjacent lens groups is the distance between the two adjacent lens groups.

[0143] Based on this, the following is an example of a camera module 30 that uses the above-mentioned optical lens 36 (all optical lenses 36 satisfy the above relationship).

[0144] Example 1

[0145] Example 1 of this application provides a camera module 30, which includes an optical lens 36. See also... Figure 12 As shown, Figure 12 This is a schematic diagram of the structure of the optical lens 36 provided in Example 1. The optical lens 36 includes a first fixed lens group 361, an image stabilizing lens group 363, a focusing lens group 364, a second fixed lens group 362, and an infrared filter 366, which are sequentially distributed along the optical axis 360 of the optical lens 36.

[0146] The first fixed lens group 361 comprises three lenses: a first lens 36a, a second lens 36b, and a third lens 36c. The first lens 36a has an object-side surface S1 and an image-side surface S2, and the edge of the object-side surface S1 of the first lens 36a serves as the aperture stop of the optical lens 36. The second lens 36b has an object-side surface S3 and an image-side surface S4. The third lens 36c has an object-side surface S5 and an image-side surface S6.

[0147] The image stabilization lens group 363 comprises two lenses, namely a fourth lens 36d and a fifth lens 36e. The fourth lens 36d and the fifth lens 36e are cemented together to form a cemented doublet lens. In this case, the fourth lens 36d has an object-side surface S7, and the fifth lens 36e has an image-side surface S9. The image-side surface of the fourth lens 36d and the object-side surface of the fifth lens 36e are cemented together to form a shared cementing surface S8.

[0148] The focusing lens group 364 has only one lens, namely the sixth lens 36f, which has an object side surface S10 and an image side surface S11.

[0149] The second fixed lens group 362 includes two lenses, namely the seventh lens 36g and the eighth lens 36h. The seventh lens 36g and the eighth lens 36h are cemented together to form a cemented doublet lens. At this time, the seventh lens 36g has an object-side surface S12, the eighth lens 36h has an image-side surface S14, and the image-side surface of the seventh lens 36g and the object-side surface of the eighth lens 36h are cemented together to form a common cementing surface S13.

[0150] The infrared filter 366 has an object side surface S15 and an image side surface S16.

[0151] Table 1a below shows the design parameters for each lens and filter 366 in Example 1, as follows:

[0152] Table 1a

[0153]

[0154] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0155]

[0156] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 1b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, A16, and A18 that can be used for the aspherical surface types of each lens group in Example 1.

[0157] Table 1b

[0158] Face Number S1 S3 S4 S5 S6 S10 S11 K 1.432E+01 0.000E+00 -4.399E+00 1.353E-02 0.000E+00 -1.000E+00 0.000E+00 A2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A4 -8.404E-05 -2.703E-04 -1.259E-04 -2.054E-05 -1.290E-05 5.886E-05 8.526E-05 A6 -1.151E-06 2.273E-05 2.272E-05 -2.577E-06 -2.630E-06 -2.049E-06 -7.438E-06 A8 2.480E-08 -1.750E-06 -1.646E-06 2.911E-07 9.358E-08 9.874E-08 5.814E-07 A10 -3.507E-09 7.316E-08 5.690E-08 -1.340E-08 1.168E-08 1.398E-09 -2.493E-08 A12 1.911E-10 -1.538E-09 -8.320E-10 3.174E-10 -7.624E-10 -2.660E-10 5.593E-10 A14 -6.531E-12 1.291E-11 2.824E-12 -1.742E-12 1.568E-11 8.769E-12 -5.188E-12 A16 1.174E-13 0.000E+00 0.000E+00 0.000E+00 -4.972E-14 -9.903E-14 0.000E+00 A18 -9.185E-16 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0159] Table 1c below shows the basic parameters of the optical lens 36 in Example 1, as follows:

[0160] Table 1c

[0161] System focal length EFL 48 mm F-number FNO 3.88 Field of view FOV 8.4° Entrance pupil diameter EPD 12.371 mm

[0162] Additionally, in Example 1, the maximum value CT of the distance between any two adjacent elements among the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extending along the optical axis 360 of the optical lens 36. MAX It is 36.040 mm. That is, in this example, CT MAX The distance is the center of the image side surface S9 of the fifth lens 36e in the image stabilization lens group 363 to the center of the object side surface S10 of the sixth lens 36f in the focusing lens group 364.

[0163] The focal length (EFL) of the focusing lens group 364 AF The focal length is 19.249mm. The image-stabilized lens group 363 has an EFL focal length of... OIS The focal length (F1) is -27.925mm. The focal length (F1) of the first fixed lens group 361 is 36.768mm.

[0164] The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 AF It is 2.258 mm. That is, in this example, CT AF It is the distance from the center of the object side surface S10 to the center of the image side surface S11 of the sixth lens 36f in the focusing lens group 364.

[0165] The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 OISIt is 1.919 mm. That is, in this example, CT OIS The distance is the distance from the center of the object side surface S7 of the fourth lens 36d in the image-stabilizing lens group 363 to the center of the image side surface S9 of the fifth lens 36e.

[0166] The total optical length (TTL) of the optical lens 36 is 65.754 mm. That is, in this example, TTL is the distance from the center of the object side surface S1 of the first lens 36a in the first fixed lens group 361 to the center of the image side surface S16 of the infrared filter 366.

[0167] Based on the values ​​of the above parameters, it can be calculated that in this example:

[0168] CT MAX / TTL = 0.569; F1 / EFL = 0.869; EFL AF / EFL = 0.458; EFL OIS / EFL = -0.628;

[0169] CT AF / TTL=0.023; CT OIS / TTL=0.039; EFL / TTL=0.700; CT MAX / EPD=3.072.

[0170] As can be seen, the values ​​of all the conditional expressions in this example are within the aforementioned limits.

[0171] Please see Figure 13 As shown, Figure 13 This is a graph showing the astigmatism of light after passing through optical lens 36 in Example 1. The horizontal axis represents the focal shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focal shift curve in the meridional direction, and the dashed line Y represents the focal shift curve in the sagittal direction. Figure 13 As can be seen, the focal offset in both the meridional and sagittal directions is controlled within the range of -0.01mm to 0. The meridional curve and the sagittal curve are quite similar. In other words, the optical lens 36 in Example 1 has low astigmatism and can focus most of the light on the correct focal point, making the image clearer and sharper.

[0172] Please see Figure 14 As shown, Figure 14 This is a distortion curve of light after passing through optical lens 36 in Example 1. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. Figure 14 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 36 in Example 1 has a small degree of distortion and low distortion.

[0173] Example 2

[0174] Example 2 of this application provides a camera module 30, which includes an optical lens 36. See also... Figure 15 As shown, Figure 15 This is a schematic diagram of the structure of the optical lens 36 provided in Example 2. The optical lens 36 includes a first fixed lens group 361, an image stabilization lens group 363, a focusing lens group 364, a second fixed lens group 362, and an infrared filter 366, which are sequentially distributed along the optical axis 360 of the optical lens 36.

[0175] The first fixed lens group 361 comprises three lenses: a first lens 36a, a second lens 36b, and a third lens 36c. The first lens 36a has an object-side surface S1 and an image-side surface S2, and the edge of the object-side surface S1 of the first lens 36a serves as the aperture stop of the optical lens 36. The second lens 36b has an object-side surface S3 and an image-side surface S4. The third lens 36c has an object-side surface S5 and an image-side surface S6.

[0176] The image stabilization lens group 363 comprises two lenses, namely a fourth lens 36d and a fifth lens 36e. The fourth lens 36d and the fifth lens 36e are cemented together to form a cemented doublet lens. In this case, the fourth lens 36d has an object-side surface S7, and the fifth lens 36e has an image-side surface S9. The image-side surface of the fourth lens 36d and the object-side surface of the fifth lens 36e are cemented together to form a shared cementing surface S8.

[0177] The focusing lens group 364 comprises two lenses, namely the sixth lens 36f and the seventh lens 36g. The sixth lens 36f and the seventh lens 36g are cemented together to form a cemented doublet lens. At this time, the sixth lens 36f has an object-side surface S10, the seventh lens 36g has an image-side surface S12, and the object-side surface of the sixth lens 36f is cemented together with the image-side surface of the fifth lens 36e to form a shared cementing surface S11.

[0178] The second fixed lens group 362 includes two lenses, namely the eighth lens 36h and the ninth lens 36i. The eighth lens 36h and the ninth lens 36i are cemented together to form a cemented doublet lens. At this time, the eighth lens 36h has an object-side surface S13, and the ninth lens 36i has an image-side surface S15. The image-side surface of the eighth lens 36h and the object-side surface of the ninth lens 36i are cemented together to form a common cementing surface S14.

[0179] The infrared filter 366 has an object side surface S16 and an image side surface S17.

[0180] Table 2a below shows the design parameters for each lens and infrared filter 366 in Example 2, as follows:

[0181] Table 2a

[0182]

[0183]

[0184] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0185]

[0186] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 2b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, A16, and A18 that can be used for the aspherical surface types of each lens group in Example 2.

[0187] Table 2b

[0188] Face Number S1 S3 S4 S5 S6 K 1.732E+01 0.000E+00 5.873E+01 1.193E+00 0.000E+00 A2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A4 -7.562E-05 2.444E-04 2.277E-04 2.763E-05 1.088E-04 A6 -1.005E-06 1.007E-05 9.832E-06 -3.572E-06 -5.038E-06 A8 6.064E-10 -8.954E-07 -7.219E-07 1.950E-07 1.108E-07 A10 -1.378E-09 2.795E-08 1.289E-08 -8.569E-09 4.884E-09 A12 8.437E-11 -4.100E-10 8.787E-11 2.669E-10 -2.981E-10 A14 -3.398E-12 2.418E-12 -3.559E-12 -2.780E-12 6.631E-12 A16 6.849E-14 0.000E+00 0.000E+00 0.000E+00 -4.471E-14 A18 -6.073E-16 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0189] Table 2c below shows the basic parameters of the optical lens 36 in Example 2, as follows:

[0190] Table 2c

[0191] System focal length EFL 46 mm F-number FNO 3.78 Field of view FOV 9.32° Entrance pupil diameter EPD 12.169 mm

[0192] Additionally, in Example 2, the maximum value CT of the distance between any two adjacent elements among the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extending along the optical axis 360 of the optical lens 36. MAX It is 37.3825 mm. That is, in this example, CT MAX The distance is the center of the image side surface S9 of the fifth lens 36e in the image stabilization lens group 363 to the center of the object side surface S10 of the sixth lens 36f in the focusing lens group 364.

[0193] The focal length (EFL) of the focusing lens group 364 AF The focal length (EFL) of the 363mm image-stabilized lens group is 21.066mm. OIS The focal length (F1) is -28.907mm. The focal length (F1) of the first fixed lens group 361 is 39.963mm.

[0194] The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 AF It is 1.526 mm. That is, in this example, CT AFIt is the distance from the center of the object side surface S10 of the sixth lens 36f in the focusing lens group 364 to the center of the image side surface S12 of the seventh lens 36g.

[0195] The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 OIS It is 2.595mm. That is, in this example, CT OIS The distance is the distance from the center of the object side surface S7 of the fourth lens 36d in the image-stabilizing lens group 363 to the center of the image side surface S9 of the fifth lens 36e.

[0196] The total optical length (TTL) of the optical lens 36 is 65.754 mm. That is, in this example, TTL is the distance from the center of the object side surface S1 of the first lens 36a in the first fixed lens group 361 to the center of the image side surface S17 of the infrared filter 366.

[0197] Based on the values ​​of the parameters mentioned above, it can be calculated that in this example,

[0198] CT MAX / TTL = 0.569; F1 / EFL = 0.869; EFL AF / EFL = 0.458; EFL OIS / EFL = -0.628;

[0199] CT AF / TTL=0.023; CT OIS / TTL=0.039; EFL / TTL=0.700; CT MAX / EPD=3.072.

[0200] As can be seen, the values ​​of all the conditional expressions in this example are within the aforementioned limits.

[0201] Please see Figure 16 As shown, Figure 16 This is a graph showing the astigmatism of light after passing through optical lens 36 in Example 2. The horizontal axis represents the focal shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focal shift curve in the meridional direction, and the dashed line Y represents the focal shift curve in the sagittal direction. Figure 16 As can be seen, the focal offset in the meridional direction is controlled within the range of -0.01mm to 0.005mm, and the focal offset in the sagittal direction is controlled within the range of -0.02mm to 0.005mm. The meridional curve and the sagittal curve are quite similar, which means that the astigmatism of the optical lens 36 in Example 2 is small, and it can focus most of the light on the correct focal point, making the image clearer and sharper.

[0202] Please see Figure 17 As shown, Figure 17This is a distortion curve of light after passing through optical lens 36 in Example 2. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. Figure 17 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 36 in Example 2 has a small degree of distortion and low distortion.

[0203] Example 3

[0204] Please return to the previous page. Figure 15 As shown. The structure of the optical lens 36 in the camera module 30 provided in Example 3 of this application is the same as that in Example 2 above, except that the design parameters of the lens and infrared filter 366 are slightly different, which will not be described again here.

[0205] Table 3a below shows the design parameters for each lens and infrared filter 366 in Example 3, as follows:

[0206] Table 3a

[0207]

[0208]

[0209] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0210]

[0211] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 3b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, A16, and A18 that can be used for the aspherical surface types of each lens group in Example 3.

[0212] Table 3b

[0213] Face Number S1 S3 S4 S5 S6 K 3.580E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A4 -3.625E-06 2.702E-05 7.394E-05 -3.787E-05 -1.226E-05 A6 -6.628E-08 -3.008E-06 -3.315E-06 1.369E-06 1.468E-06 A8 -2.840E-09 3.637E-07 7.903E-07 3.220E-07 -1.040E-07 A10 3.320E-10 -2.531E-08 -7.432E-08 -4.746E-08 2.683E-09 A12 -1.724E-11 9.952E-10 3.484E-09 2.546E-09 -1.054E-11 A14 4.751E-13 -2.054E-11 -8.053E-11 -6.303E-11 -9.348E-13 A16 -6.789E-15 1.727E-13 7.093E-13 5.821E-13 -3.838E-15 A18 3.962E-17 0.000E+00 6.481E-16 0.000E+00 0.000E+00

[0214] Table 3c below shows the basic parameters of the optical lens 36 in Example 3, as follows:

[0215] Table 3c

[0216] System focal length EFL 47.5 mm F-number FNO 3.78 Field of view FOV 9.06° Entrance pupil diameter EPD 12.566 mm

[0217] Additionally, in Example 3, the maximum value CT of the distance between any two adjacent elements among the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extending along the optical axis 360 of the optical lens 36.MAX It is 38.819mm.

[0218] The focal length (EFL) of the focusing lens group 364 AF The focal length (EFL) of the 363mm image-stabilized lens group is 17.661mm. OIS The focal length F1 of the first fixed lens group 361 is -34.991mm. The focal length F1 of the first fixed lens group 361 is 40.636mm. The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 is... AF The thickness is 3.299mm. The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 is [missing information]. OIS The optical length is 1.400mm. The total optical length (TTL) of the optical lens 36 is 66.330mm.

[0219] Based on the values ​​of the parameters mentioned above, it can be calculated that in this example,

[0220] CT MAX / TTL = 0.586; F1 / EFL = 0.856; EFL AF / EFL=0.372; EFL OIS / EFL = -0.737;

[0221] CT AF / TTL=0.050; CT OIS / TTL = 0.021; EFL / TTL = 0.716; CT MAX / EPD=3.089.

[0222] As can be seen, the values ​​of all the conditional expressions in this example are within the aforementioned limits.

[0223] Please see Figure 18 As shown, Figure 18 This is a graph showing the astigmatism curve after light passes through optical lens 36 in Example 3. The horizontal axis represents the focal shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focal shift curve in the meridional direction, and the dashed line Y represents the focal shift curve in the sagittal direction. Figure 18 As can be seen, the focal offset in the meridional direction is controlled within the range of -0.02mm to 0, and the focal offset in the sagittal direction is controlled within the range of -0.02mm to 0. The meridional curve and the sagittal curve are quite similar. In other words, the optical lens 36 in Example 3 has less astigmatism and can focus most of the light on the correct focal point, making the image clearer and sharper.

[0224] See details Figure 19 As shown, Figure 19This is a distortion curve of light after passing through optical lens 36 in Example 3. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. Figure 19 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 36 in Example 3 has a small degree of distortion and low distortion.

[0225] Example 4

[0226] Please return to the previous page. Figure 15 As shown. The structure of the optical lens 36 in the camera module 30 provided in Example 4 of this application is the same as that in Example 2 above, except that the design parameters of the lens and infrared filter 366 are slightly different, which will not be described again here.

[0227] Table 4a below shows the design parameters for each lens and infrared filter 366 in Example 4, as follows:

[0228] Table 4a

[0229]

[0230] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0231]

[0232] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 4b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, A16, and A18 that can be used for the aspherical surface types of each lens group in Example 4.

[0233] Table 4b

[0234] Face Number S1 S3 S4 S5 S6 K 4.077E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A4 -1.810E-06 3.360E-05 9.052E-05 -6.180E-07 1.752E-05 A6 8.810E-08 -2.893E-06 -4.661E-06 -3.602E-06 -4.499E-07 A8 -1.250E-08 3.602E-07 1.031E-06 8.965E-07 -8.143E-08 A10 8.180E-10 -2.606E-08 -8.719E-08 -7.841E-08 1.961E-08 A12 -3.530E-11 1.064E-09 3.201E-09 3.142E-09 -1.529E-09 A14 9.080E-13 -2.271E-11 -2.803E-11 -5.204E-11 5.446E-11 A16 -1.260E-14 1.968E-13 -1.053E-12 1.849E-13 -7.358E-13 A18 7.170E-17 0.000E+00 1.911E-14 0.000E+00 0.000E+00

[0235] Table 4c below shows the basic parameters of the optical lens 36 in Example 4, as follows:

[0236] Table 4c

[0237] System focal length EFL 47.509 mm F-number FNO 3.68 Field of view FOV 9° Entrance pupil diameter EPD 12.888 mm

[0238] Additionally, in Example 4, the maximum value CT of the distance between any two adjacent elements among the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extends along the optical axis 360 of the optical lens 36. MAX It is 38.531mm.

[0239] The focal length (EFL) of the focusing lens group 364 AF The focal length (EFL) of the 363mm image-stabilized lens group is 17.688mm. OIS The focal length F1 of the first fixed lens group 361 is -36.079mm. The focal length F1 of the first fixed lens group 361 is 38.987mm. The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 is... AF The thickness is 3.221mm. The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 is [missing information]. OIS It is 1.550mm. The total optical length (TTL) of the optical lens 36 is 66.180mm.

[0240] Based on the values ​​of the parameters mentioned above, it can be calculated that in this example,

[0241] CT MAX / TTL = 0.582; F1 / EFL = 0.821; EFL AF / EFL=0.372; EFL OIS / EFL = -0.760;

[0242] CT AF / TTL=0.049; CT OIS / TTL = 0.023; EFL / TTL = 0.718; CT MAX / EPD=2.990.

[0243] As can be seen, the values ​​of all the conditional expressions in this example are within the aforementioned limits.

[0244] Please see Figure 20 As shown, Figure 20 This is a graph showing the astigmatism of light after passing through optical lens 36 in Example 4. The horizontal axis represents the focal shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focal shift curve in the meridional direction, and the dashed line Y represents the focal shift curve in the sagittal direction. Figure 20 As can be seen, the focal offset in the meridional direction is controlled within the range of -0.008mm to 0, and the focal offset in the sagittal direction is controlled within the range of -0.008mm to 0.004mm. The meridional curve and the sagittal curve are quite similar. In other words, the optical lens 36 in Example 4 has less astigmatism and can focus most of the light on the correct focal point, making the image clearer and sharper.

[0245] Please see Figure 21 As shown, Figure 21 This is a distortion curve of light after passing through optical lens 36 in Example 4. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm.Figure 21 As can be seen, the distortion rate is controlled within the range of -2% to 0. In other words, the image captured by the optical lens 36 in Example 4 has a small degree of distortion and low distortion.

[0246] Example 5

[0247] Example 5 of this application provides a camera module 30, which includes an optical lens 36. See also... Figure 22 As shown, Figure 22 This is a schematic diagram of the structure of the optical lens 36 provided in Example 5. The optical lens 36 includes a first fixed lens group 361, an image stabilizing lens group 363, a focusing lens group 364, a second fixed lens group 362, and an infrared filter 366, which are sequentially distributed along the optical axis 360 of the optical lens 36.

[0248] The first fixed lens group 361 comprises two lenses, namely a first lens 36a and a second lens 36b. The first lens 36a has an object-side surface S1 and an image-side surface S2, and the edge of the object-side surface S1 of the first lens 36a serves as the aperture stop of the optical lens 36. The second lens 36b has an object-side surface S3 and an image-side surface S4.

[0249] The image stabilization lens group 363 comprises two lenses: a third lens 36c and a fourth lens 36d. The third lens 36c has an object-side surface S5 and an image-side surface S6. The fourth lens 36d has an object-side surface S7 and an image-side surface S8.

[0250] The focusing lens group 364 comprises two lenses, namely the fifth lens 36e and the sixth lens 36f. The fifth lens 36e has an object-side surface S9 and an image-side surface S10. The sixth lens 36f has an object-side surface S11 and an image-side surface S12.

[0251] The second fixed lens group 362 has only one lens, namely the seventh lens 36g, which has an object side surface S13 and an image side surface S14.

[0252] The infrared filter 366 has an object side surface S15 and an image side surface S16.

[0253] Table 5a below shows the design parameters for each lens and infrared filter 366 in Example 5, as follows:

[0254] Table 5a

[0255]

[0256]

[0257] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0258]

[0259] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 5b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical surface types of each lens group in Example 5.

[0260] Table 5b

[0261]

[0262] Table 5c below shows the basic parameters of the optical lens 36 in Example 5, as follows:

[0263] Table 5c

[0264] System focal length EFL 46.975 mm F-number FNO 3.2 Field of view FOV 9° Entrance pupil diameter EPD 14.680 mm

[0265] Additionally, in Example 5, the maximum value CT of the distance between any two adjacent elements among the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extending along the optical axis 360 of the optical lens 36. MAX It is 39.229 mm. That is, in this example, CT MAX The distance is the center of the image side surface S8 of the fourth lens 36d in the image stabilization lens group 363 to the center of the object side surface S9 of the fifth lens 36e in the focusing lens group 364.

[0266] The focal length (EFL) of the focusing lens group 364 AF The focal length is 22.743mm. The image-stabilized lens group has a focal length of 363 EFL. OIS The focal length is 101.252mm. The focal length F1 of the first fixed lens group 361 is 40.210mm.

[0267] The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 AF It is 3.564 mm. That is, in this example, CT AF It is the distance from the center of the object side surface S9 of the fifth lens 36e in the focusing lens group 364 to the center of the image side surface S12 of the sixth lens 36f.

[0268] The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 OIS It is 2.929 mm. That is, in this example, CT OISThe distance is the distance from the center of the object side surface S5 of the third lens 36c in the image-stabilizing lens group 363 to the center of the image side surface S8 of the fourth lens 36d.

[0269] The total optical length (TTL) of the optical lens 36 is 68.178 mm. That is, in this example, TTL is the distance from the center of the object side surface S1 of the first lens 36a in the first fixed lens group 361 to the center of the image side surface S16 of the infrared filter 366.

[0270] Based on the values ​​of the parameters mentioned above, it can be calculated that in this example,

[0271] CT MAX / TTL = 0.575; F1 / EFL = 0.856; EFL AF / EFL = 0.484; EFL OIS / EFL = 2.155;

[0272] CT AF / TTL=0.052; CT OIS / TTL = 0.043; EFL / TTL = 0.689; CT MAX / EPD = 2.672.

[0273] As can be seen, the values ​​of all the conditional expressions in this example are within the aforementioned limits.

[0274] Please see Figure 23 As shown, Figure 23 This is a graph showing the astigmatism curve after light passes through optical lens 36 in Example 5. The horizontal axis represents the focus shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focus shift curve in the meridional direction, and the dashed line Y represents the focus shift curve in the sagittal direction. Figure 23 As can be seen, the focal offset in the meridional direction is controlled within the range of -0.016mm to 0.008mm, and the focal offset in the sagittal direction is controlled within the range of -0.02mm to 0. The meridional curve and the sagittal curve are quite similar. In other words, the optical lens 36 in Example 5 has less astigmatism and can focus most of the light on the correct focal point, making the image clearer and sharper.

[0275] Please see Figure 24 As shown, Figure 24 This is a distortion curve of light after passing through optical lens 36 in Example 5. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. Figure 24 As can be seen, the distortion rate is controlled within the range of -2% to 0.4%, which means that the image captured by the optical lens 36 in Example 5 has a small degree of distortion and low distortion.

[0276] Example 6

[0277] Example 6 of this application provides a camera module 30, which includes an optical lens 36. See also... Figure 25 As shown, Figure 25 This is a schematic diagram of the structure of the optical lens 36 provided in Example 6. The optical lens 36 includes a first fixed lens group 361, an image stabilization lens group 363, a focusing lens group 364, a second fixed lens group 362, and an infrared filter 366, which are sequentially distributed along the optical axis 360 of the optical lens 36.

[0278] The first fixed lens group 361 comprises three lenses: a first lens 36a, a second lens 36b, and a third lens 36c. The first lens 36a and the second lens 36b are cemented together to form a cemented doublet lens, and the second lens 36b and the third lens 36c are also cemented together to form a cemented doublet lens. In this case, the first lens 36a has an object-side surface S1, and the edge of the object-side surface S1 of the first lens 36a serves as the aperture stop of the optical lens 36. The image-side surface of the first lens 36a is cemented with the object-side surface of the second lens 36b to form a shared cementing surface S2. The image-side surface of the second lens 36b is cemented with the object-side surface of the third lens 36c to form a shared cementing surface S3. The third lens 36c has an image-side surface S4.

[0279] The image stabilization lens group 363 comprises two lenses, namely the fourth lens 36d and the fifth lens 36e. The fourth lens 36d has an object-side surface S5 and an image-side surface S6. The fifth lens 36e has an object-side surface S7 and an image-side surface S8.

[0280] The focusing lens group 364 comprises two lenses, namely the sixth lens 36f and the seventh lens 36g. The sixth lens 36f has an object-side surface S9 and an image-side surface S10. The seventh lens 36g has an object-side surface S11 and an image-side surface S12.

[0281] The second fixed lens group 362 has only one lens, namely the eighth lens 36h, which has an object side surface S13 and an image side surface S14.

[0282] The infrared filter 366 has an object side surface S15 and an image side surface S16.

[0283] Table 6a below shows the design parameters for each lens and infrared filter 366 in Example 6, as follows:

[0284] Table 6a

[0285]

[0286] The sagitta of the aspherical surface in each of the above lens groups can be calculated using the following formula:

[0287]

[0288] Where Z is the sag of the aspherical surface, r is the radial coordinate of the aspherical surface, c is the curvature of the sphere at a fixed point on the aspherical surface, K is the quadratic surface constant, and A i Let A1 be the i-th order aspherical constant. Table 6b below gives the coefficients k, A2, A4, A6, A8, A10, A12, A14, and A16 that can be used for the aspherical surface types of each lens group in Example 6.

[0289] Table 6b

[0290] Face Number S1 S9 S10 S11 S12 S13 S14 K 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A2 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 0.000E+00 A4 -6.551E-06 -2.540E-05 -2.745E-04 -4.498E-04 -2.262E-04 3.803E-03 1.268E-02 A6 1.878E-08 -2.071E-05 -2.014E-05 1.084E-05 2.273E-06 -4.830E-04 -1.889E-03 A8 -1.044E-09 2.694E-07 1.163E-07 -9.627E-08 1.704E-07 2.919E-05 1.771E-04 A10 5.167E-13 0.000E+00 0.000E+00 -4.265E-09 2.335E-09 -6.118E-07 -1.372E-05 A12 9.348E-14 0.000E+00 0.000E+00 1.933E-10 -3.929E-10 -2.078E-08 9.687E-07 A14 1.718E-14 0.000E+00 0.000E+00 -4.311E-12 1.094E-11 1.331E-09 -4.610E-08 A16 -3.277E-16 0.000E+00 0.000E+00 6.023E-14 -1.040E-13 -1.957E-11 9.536E-10

[0291] Table 6c below shows the basic parameters of the optical lens 36 in Example 6, as follows:

[0292] Table 6c

[0293] System focal length EFL 49.005 mm F-number FNO 4.196 Field of view FOV 9° Entrance pupil diameter EPD 11.679 mm

[0294] Additionally, in Example 6, the maximum value CT of the distance between any two adjacent elements of the five components—the first fixed lens group 361, the second fixed lens group 362, the image stabilization lens group 363, the focusing lens group 364, and the image sensor 32—extends along the optical axis 360 of the optical lens 36. MAX It is 49.793 mm. That is, in this example, CT MAX The distance is the center of the image side surface S8 of the fifth lens 36e in the image stabilization lens group 363 to the center of the object side surface S9 of the sixth lens 36f in the focusing lens group 364.

[0295] The focal length (EFL) of the focusing lens group 364 AF The focal length is 23.093mm. The image-stabilized lens group has a focal length of 363 EFL. OIS The focal length is 125.124mm. The focal length F1 of the first fixed lens group 361 is 46.715mm.

[0296] The center thickness CT of the focusing lens group 364 along the optical axis 360 of the optical lens 36 AF It is 3.724 mm. That is, in this example, CT AF It is the distance from the center of the object side surface S9 of the sixth lens 36f in the focusing lens group 364 to the center of the image side surface S12 of the seventh lens 36g.

[0297] The center thickness CT of the image stabilization lens group 363 along the optical axis 360 of the optical lens 36 OIS It is 1.648 mm. That is, in this example, CT... OIS The distance is the distance from the center of the object side surface S5 of the fourth lens 36d in the image stabilization lens group 363 to the center of the image side surface S8 of the fifth lens 36e.

[0298] The total length (TTL) of the optical lens 36 along its own optical axis 360 is 77.139 mm. That is, in this example, TTL is the distance from the center of the object side surface S1 of the first lens 36a in the first fixed lens group 361 to the center of the image side surface S16 of the infrared filter 366.

[0299] Based on the values ​​of the parameters mentioned above, it can be calculated that in this example,

[0300] CT MAX / TTL = 0.646; F1 / EFL = 0.953; EFL AF / EFL = 0.471; EFL OIS / EFL=2.553;

[0301] CT AF / TTL=0.048; CT OIS / TTL = 0.021; EFL / TTL = 0.635; CT MAX / EPD=4.263.

[0302] It is evident that the values ​​of all conditional expressions in this practical example are within the aforementioned limits.

[0303] Please see Figure 26 As shown, Figure 26 This is a graph showing the astigmatism of light after passing through optical lens 36 in Example 6. The horizontal axis represents the focal shift, the vertical axis represents the image height, and the reference wavelength of the light is 546 nm. The solid line X represents the focal shift curve in the meridional direction, and the dashed line Y represents the focal shift curve in the sagittal direction. Figure 26 As can be seen, the focal offset in the meridional direction is controlled within the range of -0.2mm to 0.02mm, and the focal offset in the sagittal direction is controlled within the range of -0.03mm to -0.01mm. The meridional curve and the sagittal curve are quite similar, which means that the optical lens 36 in Example 6 has less astigmatism and can focus most of the light on the correct focal point, making the image clearer and sharper.

[0304] Please see Figure 27 As shown, Figure 27 This is a distortion curve of light rays after passing through optical lens 36 in Example 6. The horizontal axis represents the distortion rate, the vertical axis represents the image height, and the reference wavelength of the light rays is 546 nm. Figure 27 As can be seen, the distortion rate is controlled within the range of -2% to 3%, which means that the image captured by the optical lens 36 in Example 6 has a small degree of distortion and low distortion.

[0305] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0306] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An optical lens characterized in that, The optical lens is composed of a first fixed lens group, a second fixed lens group, an anti-shake lens group and a focusing lens group arranged along the extending direction of the optical axis of the optical lens, wherein: The first fixed lens group is composed of two or three lenses with optical power, and the first two lenses arranged in the first fixed lens group from the object side to the image side are a first lens and a second lens, respectively, the first lens has positive optical power, and the second lens has negative optical power; the second fixed lens group is composed of one or two lenses with optical power; the anti-shake lens group is composed of two lenses with optical power; the focusing lens group is composed of one or two lenses with optical power; The second fixed lens group, the anti-shake lens group and the focusing lens group are located on the image side of the first fixed lens group, and at least one of the anti-shake lens group and the focusing lens group is located between the first fixed lens group and the second fixed lens group; The optical lens satisfies the following relationship: 0.1 < F1 / EFL < 1, EFL AF / EFL < 0.6, -4 < EFL OIS / EFL < 4; wherein F1 is a focal length of the first fixed lens group; EFL is a system focal length of the optical lens; EFL AF is a focal length of the focusing lens group; EFL OIS is a focal length of the anti-shake lens group.

2. The optical lens of claim 1, wherein, The optical lens further comprises at least one light turning component, which is located on the image side of the first fixed lens group.

3. The optical lens of claim 1, wherein, The first fixed lens group comprises a reflective prism and at least one lens with optical power.

4. The optical lens of claim 1, wherein, At least one of the anti-shake lens group, the focusing lens group and the second fixed lens group contains a doublet lens.

5. The optical lens of claim 1, wherein, The optical lens further comprises an infrared filter, which is located on the image side of the last lens in the optical lens along the extending direction of the optical axis of the optical lens.

6. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm, which is located on the object side of the first fixed lens group; or the diaphragm extends around the object side surface of the first fixed lens group.

7. The optical lens for any one of claims 1 to 6, wherein, The optical lens satisfies the following relationship: 0.4 < CT MAX / TTL < 0.7; wherein TTL is the total optical length of the optical lens along the extending direction of its own optical axis; CT MAX is the maximum value of the distance between any two adjacent elements among the four elements of the first fixed lens group, the second fixed lens group, the anti-shake lens group and the focusing lens group along the extending direction of the optical axis of the optical lens.

8. The optical lens for any of claims 1-6, wherein, The optical lens satisfies the following relationship: 0.4 Wherein, EFL is the system focal length of the optical lens; TTL is the total optical length of the optical lens along its own optical axis.

9. The optical lens for any one of claims 1 to 6, wherein, The optical lens satisfies the following relationship: 3.1 Wherein, FNO is the aperture value of the optical lens.

10. The optical lens for any of claims 1-6, wherein, The optical lens satisfies the following relationship: 0.01 < CT AF TTL < 0.2; wherein CT AF is the center thickness of the focusing lens group along the direction of extension of the optical axis of the optical lens; and TTL is the total optical length of the optical lens along the direction of extension of its own optical axis.

11. The optical lens for any one of claims 1 to 6, wherein, The optical lens satisfies the following relationship: 0.01 < CT OIS / TTL < 0.2; wherein CT OIS is the center thickness of the lens group along the direction of extension of the optical axis of the optical lens; and TTL is the total optical length of the optical lens along the direction of extension of its own optical axis.

12. The optical lens for any of claims 1-6, wherein, The optical lens satisfies the following relationship: 2.5 < CT MAX / EPD < 4.5; wherein EPD is an entrance pupil diameter of the optical lens; CT MAX is a maximum value of a distance between any two adjacent elements among the first fixed lens group, the second fixed lens group, the anti-shake lens group, and the focus lens group in an extension direction of an optical axis of the optical lens.

13. A camera module, comprising: It comprises: a substrate; an image sensor disposed on the substrate, the image sensor having an imaging surface; an optical lens according to any one of claims 1-12, the optical lens being electrically connected to the substrate, and the image side of the optical lens facing the imaging surface.

14. The camera module of claim 13, wherein, when the optical lens satisfies 0.4 < CT MAX / TTL < 0.7, or 2.5 < CT MAX / EPD < 4.5, the CT MAX is also the maximum value of the distance between the optical lens and the image sensor along the direction of extension of the optical axis of the optical lens.

15. An electronic device, comprising: It comprises: a housing; a mainboard disposed in the housing; a camera module according to claim 13 or 14, the camera module being disposed in the housing and electrically connected to the mainboard.

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