Optical lens assembly and camera module

Abstract

The application discloses an optical lens assembly and a camera module. The optical lens assembly comprises an optical lens, the optical lens comprises a lens group and a lens barrel, and the lens group is accommodated in the lens barrel. The lens group comprises a first lens group, the first lens group comprises a first lens, the first lens has an incident light side surface and an outgoing light side surface, the incident light side surface comprises an incident light area and a first reflection area, and the outgoing light side surface comprises an outgoing light area and a second reflection area. The first reflection area and the second reflection area are used for reflecting light rays entering the first lens from the incident light area. A second lens group is used for allowing light rays to enter the second lens group through the outgoing light area, the second lens group comprises a plurality of second lenses, at least one second lens close to an image side is used as a compensation lens for moving relative to other second lenses, and a back focus motor is used for driving the compensation lens to move.

Description

Technical Field

[0001] This application relates to the field of camera module technology, and in particular to an optical lens assembly and a camera module. Background Technology

[0002] As the smartphone market matures, users' demands for higher-quality images and higher zoom capabilities are constantly increasing. Existing technologies improve image quality by integrating one or more camera modules into the device. For flagship models, this typically involves integrating telephoto, wide-angle, and standard camera modules (equivalent to a 25mm main camera) to meet the needs of telephoto, wide-angle, and standard shooting.

[0003] To increase the focal length of the camera module, the total optical length (TTL) of the lens needs to be further increased for telephoto camera modules. However, lenses with a large total optical length are difficult to fit into the internal space of the camera body. Therefore, to achieve multi-camera zoom shooting, it may be necessary to add folding optics or planar reflective optics to the telephoto camera module to form a periscope camera module. However, although folding optics deflect light, their aperture and optical diameter are relatively small, affecting the image quality. At the same time, the higher the zoom ratio of the camera module, the larger the rear focal length of the lens is required, resulting in a larger horizontal size of the camera module.

[0004] In existing technologies, folding optical designs are limited by the folding of the optical path, and the height of the camera body does not allow for a large diameter of the lens. Therefore, the light-receiving aperture of the lens in the periscope camera module is limited. A smaller light-receiving aperture will result in more noise / noise during the image imaging process. At the same time, a smaller light-receiving aperture will result in insufficient light intake, affecting image quality.

[0005] In existing technologies, periscope camera modules, due to the folding of the optical path, require prisms / mirrors, lenses, chips, and multiple corresponding driving components and / or circuit boards, which need to be soldered together. After the prism module, lens module, and circuit board assembly module are assembled, they also need to be encapsulated in a housing. Therefore, periscope camera modules have a large number of components and a complex structure, resulting in higher manufacturing costs.

[0006] In existing technologies, Cassegrain-based optical systems are also used in telephoto camera modules to fold the light path and solve some of the problems. Cassegrain-based optical systems often include multiple reflective surfaces. After light enters through the incident surface, it undergoes multiple reflections. The reflected light can be further processed by refractive elements, ultimately forming a clear image on the image sensor. Understandably, the catadioptric design of Cassegrain-based optical systems increases the optical path, thus achieving a larger overall optical length and a longer focal length without increasing the overall lens length. Furthermore, most Cassegrain-based optical systems remain relatively upright, so the camera body height does not affect the lens aperture, allowing for a larger aperture while maintaining image quality. Unlike periscope camera modules, which typically involve multiple groups of prisms / mirrors and optical lenses requiring multiple circuit board solderings and discrete component assembly, Cassegrain-based optical systems generally have a simpler assembly structure, except for the cost of the optical lens.

[0007] For telephoto lenses based on Cassegrain reflection optical systems, how to reduce the impact of assembly precision, manufacturing tolerances, and usage environment on product quality and image quality is also something that existing technologies have not considered.

[0008] In addition, due to the large size of telephoto camera modules, they occupy more space in the phone design, making it difficult to arrange other components. Therefore, it is necessary to provide a more spatially integrated module structure. Summary of the Invention

[0009] One objective of this application is to provide an optical lens assembly and a camera module that overcomes the shortcomings of the prior art by reflecting the light path, reducing the size of the camera module, and making the camera module adaptable to the trend of thinner terminals.

[0010] According to a first aspect of this application, an optical lens assembly is provided, comprising:

[0011] An optical lens, comprising a lens group and a lens barrel, wherein the lens group is housed in the lens barrel;

[0012] The lens group includes: a first lens group, the first lens group including a first lens, the first lens having an incident light-side surface and an exit light-side surface, the incident light-side surface including an incident light area and a first reflection area, the exit light-side surface including an exit light area and a second reflection area; wherein, the first reflection area and the second reflection area are used to reflect light rays incident from the incident light area into the first lens;

[0013] A second lens group is formed, through which light exits from the light-emitting area. The second lens group comprises multiple second lenses, wherein at least one second lens near the image side acts as a compensating lens and moves relative to the other second lenses.

[0014] A rear focal motor drives the compensation lens to move.

[0015] In some embodiments, the lens barrel includes an upper lens barrel portion and a lower lens barrel portion, the lower lens barrel portion including a first lower lens barrel and a second lower lens barrel, wherein the compensating lens is fixed to the second lower lens barrel to form a second group of lenses; the other second lens is fixed to the first lower lens barrel, the first lens is fixed to the upper lens barrel portion, and the upper lens barrel portion and the first lower lens barrel are fixed to form a first group of lenses.

[0016] In some embodiments, the back focus motor includes a back focus motor fixed portion, a back focus motor movable portion, and a back focus motor drive assembly disposed between the back focus motor fixed portion and the back focus motor movable portion, wherein the back focus motor drive assembly connects the back focus motor fixed portion and the back focus motor movable portion and drives the back focus motor movable portion to move relative to the back focus motor fixed portion.

[0017] In some embodiments, the second group of lenses is disposed on the movable part of the back focal motor, and the second group of lenses is driven by the back focal motor drive assembly to move relative to the first group of lenses to adjust the back focal distance of the optical lens.

[0018] In some embodiments, the first lower lens barrel of the first lens group extends downward into the back focus motor.

[0019] In some embodiments, the maximum outer diameter of the back focus motor is smaller than the maximum outer diameter of the first lens.

[0020] According to a second aspect of this application, a camera module is provided, comprising:

[0021] Photosensitive components;

[0022] The optical lens assembly as described in any one of claims 1 to 6, wherein the optical lens assembly is disposed on the light-sensitive path of the photosensitive component; and

[0023] A lens support is provided between the optical lens assembly and the photosensitive assembly.

[0024] In some embodiments, the first group of lenses is fixed to the photosensitive component via the lens support, the back focus motor is fixed to the photosensitive component, and the second group of lenses is fixed to the photosensitive component via the back focus motor.

[0025] In some embodiments, the first group of lenses is fixed to the photosensitive component via the lens support, the back focus motor is fixed to the lens support, and the second group of lenses is fixed to the photosensitive component via the back focus motor and the lens support.

[0026] In some embodiments, the back focus motor is fixed to the lens support and the photosensitive assembly, the first group of lenses is fixed to the photosensitive assembly via the lens support and the back focus motor, and the second group of lenses is fixed to the photosensitive assembly via the back focus motor.

[0027] Compared with the prior art, this application has at least one of the following technical effects:

[0028] 1. The light path is reflected through the first lens, thus achieving the effect of a telephoto lens.

[0029] 2. Because the light path is reflected, the size of the camera module is reduced, making the camera module adaptable to the trend of thinner terminals.

[0030] 3. The compensation lens is positioned close to the image plane of the optical lens, which is more conducive to achieving the effects of field curvature and back focus compensation.

[0031] 4. By using the method of driving the compensation lens to move for back focus compensation, the demand for driving force can be reduced, and a lower-cost and smaller back focus motor can be used accordingly.

[0032] 5. The use of a compensation lens solution can actively adjust the back focus and field curvature range of the optical lens, which is beneficial for optimizing the display effect of telephoto lenses.

[0033] 6. Providing a flat mounting surface for the rear focus motor helps reduce assembly tolerances of the camera module. Attached Figure Description

[0034] Figure 1A This is a schematic diagram of the lens assembly according to an embodiment of this application;

[0035] Figure 1B and Figure 1C These are two structural schematic diagrams of the first lens according to an embodiment of this application;

[0036] Figure 2A and Figure 2B These are two structural schematic diagrams of an optical lens with an integrated lens barrel according to an embodiment of this application;

[0037] Figure 3A and Figure 3B These are two structural schematic diagrams of a camera module carrying a lens drive motor according to an embodiment of this application;

[0038] Figure 4A , Figure 4B and Figure 4C These are three structural schematic diagrams of a camera module carrying a back focus motor according to an embodiment of this application;

[0039] Figure 5A and Figure 5B These are two structural schematic diagrams of an optical lens with a split lens barrel according to an embodiment of this application;

[0040] Figure 6A and Figure 6B These are two structural schematic diagrams of a camera module carrying a lens drive motor according to an embodiment of this application;

[0041] Figure 7A , Figure 7B and Figure 7C These are three structural schematic diagrams of a camera module carrying a back focus motor according to an embodiment of this application;

[0042] Figure 8A and Figure 8B These are two structural schematic diagrams of an optical lens with a split lens barrel according to an embodiment of this application;

[0043] Figure 9A and Figure 9B These are two structural schematic diagrams of a camera module carrying a lens drive motor according to an embodiment of this application;

[0044] Figure 10A , Figure 10B and Figure 10C These are three structural schematic diagrams of a camera module carrying a back focus motor according to an embodiment of this application. Detailed Implementation

[0045] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0046] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0047] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0048] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0049] It should be noted that, as used in this application, the terms “basically,” “approximately,” and similar terms are used to indicate approximation rather than degree, and are intended to describe inherent deviations in measured or calculated values ​​that would be recognized by a person skilled in the art.

[0050] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection, a contact connection, or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] Exemplary camera module

[0052] like Figures 1A to 10C As shown, the camera module according to the embodiments of this application is explained, which includes a photosensitive component 30, an optical lens 10 held on the photosensitive path of the photosensitive component 30, and a drive motor for driving the optical lens 10 and / or the photosensitive component 30 to move to achieve optical performance adjustment, for example, for achieving functions such as optical image stabilization and optical focusing.

[0053] Accordingly, the optical lens 10 includes a lens barrel 11 and a lens group 12 mounted on the lens barrel 11, the lens group 12 including at least one optical lens. The lens group 12 is housed in the lens barrel 11, and the number of at least one optical lens in the lens group 12 can be one or more, without limitation.

[0054] The drive motor further includes a lens drive motor 20 and / or a chip drive motor 40. The lens drive motor 20 drives the optical lens 10 to translate in the Z-axis direction to adjust the distance between the optical lens 10 and the photosensitive component 30, thereby enabling the optical lens 10 to focus. It also drives the optical lens 10 to translate in the X and Y axes and / or rotate around the Z-axis to achieve translational and / or rotational image stabilization. The chip drive motor 40 drives the photosensitive chip 32 to translate in the Z-axis direction to achieve the photosensitive chip 32 to focus. It also drives the photosensitive chip 32 to translate in the X and Y axes and / or rotate around the Z-axis to achieve translational and / or rotational image stabilization. In this embodiment, the X-axis and Y-axis are perpendicular to each other, and the Z-axis is perpendicular to the plane containing the X-axis and Y-axis. In other words, the X-axis, Y-axis, and Z-axis constitute a three-dimensional coordinate system. The XOY plane containing the X-axis and Y-axis is also called the horizontal plane. The Z-axis approaches the direction of optical focusing / zoom or is parallel to the optical axis. It is understood that the camera module in this application may include only the lens drive motor 20, or only the chip drive motor 40, or both the lens drive motor 20 and the chip drive motor 40. This application does not impose any limitations on this.

[0055] In the embodiments of this application, the lens drive motor 20 and the chip drive motor 40 can be motors of the following types: voice coil lens drive motor, piezoelectric lens drive motor, SMA (shape memory alloy) lens drive motor, etc.

[0056] The photosensitive component 30 includes a circuit board 31, a photosensitive chip 32 electrically connected to the circuit board 31, and electronic components 33. The photosensitive chip 32 is used to receive external light collected by the optical lens 10 to form an image and is electrically connected to an external mobile electronic device through the circuit board 31. In one embodiment of this application, the electronic component 33 can be one or more of passive electronic devices such as resistors and capacitors, and active electronic devices such as driver chips and memory chips. The electronic component 33 can be electrically connected to the front or back of the circuit board 31, depending on the design requirements of the camera module.

[0057] The photosensitive chip 32 is directly or indirectly fixed to the circuit board 31. The photosensitive chip 32 includes a photosensitive area and a non-photosensitive area. The photosensitive chip 32 is electrically connected to the circuit board 31 through chip pads located in the non-photosensitive area. In one embodiment of this application, the circuit board 31 includes a circuit board body 311, a connecting strip 312, a connector 313, and a reinforcing plate 314. The connecting strip 312 connects and electrically conducts the circuit board body 311 and the connector 313, thereby transmitting the imaging information acquired by the circuit board body 311 from the photosensitive chip 32 to an external mobile electronic device through the connector 313. The reinforcing plate 314 is fixed to the back of the circuit board body 311, thereby increasing the structural strength of the circuit board body 311. In a specific example, the circuit board body 311 also has a recessed circuit board through hole 3111 therein, and the reinforcing plate 314 is fixed to the lower surface of the circuit board body 311 by means of, for example, adhesive bonding. The reinforcing plate 314 and the circuit board body 311 form a mounting cavity to accommodate the photosensitive chip 32, thereby avoiding the influence of the thickness of the circuit board body 311 on the thickness of the photosensitive component 30 and reducing the height of the camera module.

[0058] The photosensitive assembly 30 also includes a filter element 35, which is held in the photosensitive path of the photosensitive chip 32 to filter incident light entering the photosensitive chip 32. In a specific example, the photosensitive assembly 30 also includes a filter element holder 34, to which the filter element 35 is mounted and fixed, corresponding to at least the photosensitive area of ​​the photosensitive chip 32. The filter element 35 can be attached to the filter element holder 34 either upright or upside down. The filter element holder 34 has a light-transmitting hole, so that incident light passing through the optical lens 10 can pass through the light-transmitting hole of the filter element holder 34 and enter the photosensitive chip 32.

[0059] Exemplary optical lens

[0060] like Figures 1A to 2B , Figure 5A , Figure 5B , Figure 8A and Figure 8BAs shown, the optical lens 10 includes a lens group 12 housed within a lens barrel 11. The lens group 12 includes a first lens group 121 and a second lens group 122 arranged along the incident light direction. The first lens group 121 is mounted on the upper side of the lens barrel 11, and the second lens group 122 is mounted on the lower side of the lens barrel 11. The first lens group 121 includes a first lens 1210, which includes at least one reflective surface. In a specific example of this application, the first lens 1210 has an incident light-side surface 12111 and an exit light-side surface 12112. The incident light-side surface 12111 includes an incident light area 121111 and a first reflection area 121112, and the exit light-side surface 12112 includes an exit light area 121121 and a second reflection area 121122. The first reflection area 121112 and the second reflection area 121122 are used to reflect light rays entering the first lens 1210 from the incident light area 121111. The second lens group 122 includes a plurality of second lenses 1220. The first lens 1210 and the plurality of second lenses 1220 constitute the optical system of the optical lens 10. Light rays enter the second lens group 122 through the exit light area 121121. Light enters the first lens 1210 and is reflected by at least one of the reflecting surfaces before exiting to multiple second lenses 1220. The incident light then passes through the multiple second lenses 1220 and enters the photosensitive assembly 30. In a specific example of this application, the first lens 1210 can be a catadioptric lens. By implementing a reflected light path through the first lens 1210, the effect of a telephoto lens is achieved. Furthermore, because the light path is reflected, a smaller, upright lens module can be used, reducing the size of the camera module and allowing it to adapt to the trend towards thinner terminals.

[0061] In one embodiment of this application, along a direction perpendicular to the optical axis of the second lens group 122, the maximum lateral outer diameter of the first lens 1210 is greater than the maximum lateral outer diameter of the second lens group 122. The maximum lateral outer diameter of each second lens 1220 in the second lens group 122 gradually increases along the incident light direction. Thus, the optical lens 10 has a head with a larger lateral dimension, and the lateral dimensions of the multiple optical lenses in the lens group 12 first decrease and then increase along the incident light direction. It should be noted that in this application, the optical axis of the optical lens 10 is based on the optical axis of the second lens group 122; in other words, the optical axis of the second lens group 122 is also the optical axis of the optical lens 10.

[0062] In one specific embodiment of this application, the first lens group 121 includes a first lens 1210, which can be made of glass or resin. Each second lens 1220 in the second lens group 122 is an aspherical optical lens. Spacers (Mylar plates) or spacers (plastic or metal) are provided between each second lens 1220 to reduce stray light from the optical lens 10 or adjust the distance between each second lens 1220. Each second lens 1220 can be made of glass or resin. The materials of the first lens 1210 and the second lenses 1220 can be different; for example, the first lens 1210 can be made of glass while each second lens 1220 can be made of resin or plastic, thereby reducing the overall weight of the optical lens 10.

[0063] In one embodiment of this application, the lens barrel 11 includes an upper lens barrel portion 111 and a lower lens barrel portion 112. A first lens 1210 is housed in the upper lens barrel portion 111, which has a first lens receiving cavity 1101. The first lens assembly 121 is installed in the first lens receiving cavity 1101. A second lens assembly 122 is housed in the lower lens barrel portion 112, which has a second lens receiving cavity 1102. The second lens assembly 122 is installed in the second lens receiving cavity 1102. In a specific example of this application, the first lens assembly 121 is fixed to the upper lens barrel portion 111 by a connector 13, and the second lens assembly 122 is fixed to the lower lens barrel portion 112 by a pressure ring and / or a connecting medium (e.g., an adhesive medium). The upper lens barrel portion 111 and the lower lens barrel portion 112 can be integrally formed by injection molding, such as... Figure 2A or Figure 2B As shown; the upper lens barrel 111 and the lower lens barrel 112 can also be fixed together by a connecting medium 80 (e.g., an adhesive medium), thereby forming a complete optical system with the first lens group 121 and the second lens group 122, as shown. Figure 5A , Figure 5B , Figure 8A or Figure 8B As shown. In a specific example, the first lens group 121 includes one first lens 1210, and the second lens group 122 includes three or more second lenses 1220.

[0064] Continue to refer to Figure 1AThe first lens 1210 includes an optical portion 1211 and a structural portion 1212. The structural portion 1212 is located around the optical portion 1211, and the optical portion 1211 and the structural portion 1212 can be fixed together by integral molding. The optical portion 1211 provides a path for incident light to pass through, and the structural portion 1212 supports the position of the optical portion 1211 in the optical system. In one embodiment of this application, the first lens 1210 is fixed to the upper lens barrel 111 by a connector 13 provided between the structural portion 1212 and the upper lens barrel 111; in another embodiment of this application, the first lens 1210 is fixed to the upper lens barrel 111 by a connector 13 provided between the optical portion 1211 and the upper lens barrel 111; in yet another embodiment of this application, connectors 13 are provided between both the structural portion 1212 and the optical portion 1211 of the first lens 1210 and the upper lens barrel 111, thereby fixing the first lens 1210 to the upper lens barrel 111.

[0065] The optical component 1211 includes at least two reflective surfaces, which are optically facing each other. In other words, incident light rays are reflected by at least two reflective surfaces and then incident on the second lens group 122. In one embodiment of this application, the number of reflective surfaces in the optical component 1211 is even, so that the side where the incident light rays enter the optical component 1211 and the side where they exit the optical component 1211 can be located on opposite sides. In another embodiment of this application, the number of reflective surfaces in the optical component 1211 is odd, so that the side where the incident light rays enter the optical component 1211 and the side where they exit the optical component 1211 can be located on the same side. The optical component 1211 includes an incident light side surface 12111 and an exit light side surface 12112. The incident light side surface 12111 is located on the object side of the optical component 1211 (i.e., the side on which the incident light is incident), and the exit light side surface 12112 is located on the other side of the optical component 1211 opposite to the incident light side surface 12111. At least two reflective surfaces are distributed on the incident light side surface 12111 and the exit light side surface 12112.

[0066] The light-incident surface 12111 and the light-exit surface 12112 are respectively formed on opposite sides of the optical portion 1211. In one embodiment of this application, the light-incident surface 12111 includes a light-incident region 121111 and at least one first reflective region 121112, and the light-exit surface 12112 includes a light-exiting region 121121 and at least one second reflective region 121122. The light-incident region 121111 is distributed in a ring around the at least one first reflective region 121112 along the circumference of the optical portion 1211, and the at least one second reflective region 121122 is distributed in a ring around the light-exiting region 121121 along the circumference of the optical portion 1211. After incident light enters the optical portion 1211 from the light-incident area 121111, it is reflected between at least one of the second reflection areas 121122 and at least one of the first reflection areas 121112, and finally exits the optical portion 1211 from the light-out area 121121.

[0067] In one embodiment of this application, the optical portion 1211 has a central axis, and the optical portion 1211 is rotationally symmetrical about the central axis; in other words, the optical portion 1211 has a shape of revolution. The central axis of the optical portion 1211 is aligned with the optical axis of the second lens group 122. It is conceivable that, due to manufacturing precision and assembly tolerances, or due to the need for calibration during assembly, there may be a certain angular or distance deviation between the central axis of the optical portion 1211 and the optical axis of the second lens group 122.

[0068] The light-receiving area 121111 can be a flat surface, an outwardly convex curved surface, or an inwardly concave curved surface. In one embodiment of this application, the light-receiving area 121111 is a flat surface. This reduces the manufacturing difficulty of the first lens 1210 and reduces astigmatism problems in the optical system; for example... Figure 1C As shown, in another embodiment of this application, the light-receiving area 121111 is an outwardly convex curved surface, which can increase the field of view of the optical system; as Figure 1B As shown, in another embodiment of this application, the light-incident area 121111 is an inwardly concave curved surface, which can diverge the incident light and reduce the height dimension of the optical part 1211 (the height dimension is the dimension along the optical axis direction of the second lens group 122).

[0069] In one embodiment of this application, the number of the first reflective areas 121112 on the light-incident side surface 12111 is one, and the number of the second reflective areas 121122 on the light-exiting side surface 12112 is also one. After the incident light enters the optical part 1211 through the first refractive surface, it travels to the second reflective area 121122, and after being reflected by the second reflective area 121122, it travels to the first reflective area 121112. Finally, after being reflected by the first reflective area 121112, it travels to the light-exiting area 121121 and exits the optical part 1211 from the light-exiting area 121121.

[0070] The first reflective area 121112, the light-emitting area 121121, and the second reflective area 121122 can be a plane, an outwardly convex curved surface, or an inwardly concave curved surface. In one embodiment of this application, the first reflective area 121112, the light-emitting area 121121, and the second reflective area 121122 are all curved surfaces. In a specific example, the first reflective area 121112 is an inwardly concave curved surface, the second reflective area 121122 is an outwardly convex curved surface, and the light-emitting area 121121 is an outwardly convex curved surface. In other words, the first reflective area 121112, the light-emitting area 121121, and the second reflective area 121122 all convex toward the side of the second lens group 122.

[0071] To enhance the reflectivity of the first reflective region 121112 and the second reflective region 121122, reflective layers are provided on the first reflective region 121112 and the second reflective region 121122. The reflective layer may be a silver-containing reflective film, deposited on the first reflective region 121112 and the second reflective region 121122 by vapor deposition or chemical etching. In other embodiments of this application, the reflective layer may also be an aluminum- or gold-containing reflective film.

[0072] Specifically, the first reflective area 121112 has a first image side 121112a and a first object side 121112b. The first image side 121112a is located on the inner side of the first reflective area 121112, and the first object side 121112b is located on the outer side of the first reflective area 121112 opposite to the first image side 121112a. The reflective layer is disposed on the first object side 121112b of the first reflective area 121112 (that is, the reflective layer is disposed on the outer side of the first reflective area 121112). The second reflective area 121122 has a second image side surface 121122a and a second object side surface 121122b. The second image side surface 121122a is located on the outer side surface of the second reflective area 121122, and the second object side surface 121122b is located on the inner side surface of the second reflective area 121122 opposite to the second image side surface 121122a. The reflective layer is disposed on the second image side surface 121122a of the second reflective area 121122 (that is, the reflective layer is disposed on the outer side surface of the second reflective area 121122).

[0073] Further reference Figure 2B and Figure 5B In one embodiment of this application, the light-emitting side surface 12112 further includes an optical surface connection area 121123. This optical surface connection area 121123 is located between and connects the second reflection area 121122 and the light-emitting area 121121. The optical surface connection area 121123 is used to arrange a connector 13 to bond the optical portion 1211 and the upper lens barrel portion 111. This avoids the connector 13 being positioned between the second reflection area 121122 and the upper lens barrel portion 111, preventing any impact on the reflective layer disposed in the second reflection area 121122. The connector 13 positioned between the optical surface connection area 121123 and the upper lens barrel portion 111 can be black, thus reducing the risk of stray light caused by the connector 13.

[0074] The structural part 1212 is fixed in a ring shape around the periphery of the optical part 1211. The structural part 1212 has a top surface 12121, a side surface 12123, and a bottom surface 12122. The top surface 12121 is connected to the light-incident side surface 12111 of the optical part 1211, the bottom surface 12122 is connected to the light-exit side surface 12112 of the optical part 1211, and the side surface 12123 connects the top surface 12121 and the bottom surface 12122.

[0075] Continue to refer to Figure 2A and Figure 2BThe lens barrel 11 is a one-piece lens barrel, and the upper lens barrel portion 111 and the lower lens barrel portion 112 can be integrally formed, for example, by injection molding. The upper lens barrel portion 111 forms a first lens receiving cavity 1101 around the lens barrel, and has a through hole, exhibiting a structure that decreases in size from top to bottom. The first lens group 121 is disposed within the first lens receiving cavity 1101. The lower lens barrel portion 112 forms a second lens receiving cavity 1102 around the lens barrel, and has a through hole, exhibiting a structure that increases in size from top to bottom. The top of the second lens receiving cavity 1102 communicates with the bottom of the first lens receiving cavity 1101, forming a passage for light to pass through. The second lens group 122 is disposed within the second lens receiving cavity 1102. The first lens group 121 further includes a first lens 1210, and the second lens group 122 includes at least one second lens 1220. In this application, "up" refers to the direction of light reception, i.e., the object-side direction 101, and "down" refers to the image-side direction 102, which will not be repeated below.

[0076] Furthermore, the upper lens barrel portion 111 includes an upper lens barrel support portion 1111 and an upper lens barrel extension portion 1112. The lower lens barrel portion 112 includes a lower lens barrel inner extension portion 1121 and a lower lens barrel body 1122. The lower lens barrel inner extension portion 1121 has a lens barrel opening 1103, which connects the first lens receiving cavity 1101 and the second lens receiving cavity 1102 and is adapted to allow light to pass through. The first lens 1210 further includes an optical portion 1211 and a structural portion 1212. The optical portion 1211 is made of a light-transparent material and provides a path for imaging light. The structural portion 1212 surrounds the periphery of the optical portion 1211 and is integrally formed with the optical portion 1211, providing a structure for mounting the first lens 1210. The upper lens barrel support 1111 is used to support the structural part 1212 of the first lens 1210. The upper lens barrel support 1111 includes a top surface 11111, a bottom surface 11112, and a side surface 11113 connecting the top surface 11111 and the bottom surface 11112. The top surface 11111 of the support and the structural bottom surface 12122 of the first lens 1210 have a gap, which is an adjustment margin during active calibration. After active calibration, a connector 13 (such as glue or other connecting medium) can be placed in the gap for fixation.

[0077] The upper lens barrel extension 1112 is used to support the optical portion 1211 of the first lens 1210. The upper extension surface 11121 of the upper lens barrel extension 1112 may have a shape similar to the light-emitting side surface 12112 of the first lens 1210 to better support the first lens 1210 and evenly distribute stress. The connector 13 includes at least one first medium 131, and the upper extension surface 11121 may further have at least one first stepped groove 11121a for accommodating the first medium 131. The first medium 131 can be disposed in the first stepped groove 11121a to fix the relative position of the upper extension surface 11121 of the lens barrel and the light-emitting side surface 12112 of the first lens 1210.

[0078] Furthermore, a second stepped groove 11121b can be formed at the junction of the lower lens barrel inner extension 1121 and the upper lens barrel extension 1112. This second stepped groove 11121b can be used to accommodate the first medium 131. The first medium 131 can be disposed in the second stepped groove 11121b to fix the relative position of the upper lens barrel extension surface 11121 and the light-emitting side surface 12112 of the first lens 1210. It is understood that the first medium 131 can be disposed at either the first stepped groove 11121a or the second stepped groove 11121b, or at both locations, to strengthen the adhesive relationship between the first lens 1210 and the upper lens barrel 111 and reduce the risk of loosening.

[0079] The upper lens barrel extension 1112 also has a lower lens barrel extension surface 11122. The lower lens barrel extension surface 11122 has a stepped structure that extends downward to the lower lens barrel 112. This stepped structure is used to cooperate with the lens barrel 11 when it is installed on the lens movable part 22 of the lens drive motor 20, so that the lower lens barrel extension surface 11122 is fitted with the upper surface of the lens movable part 22.

[0080] During assembly, the multiple second lenses 1220 of the second lens group 122 are first assembled and fixed sequentially along the optical axis within the lower lens barrel 112. Adjusting the relative position of the first lens 1210 and the second lens group 122 can be achieved by fixing the lower lens barrel 112 and moving the first lens 1210, or by fixing the first lens 1210 and moving the second lens group 122. In this embodiment, it is preferable to fix the lower lens barrel 112 and use a lens assembly device to pick up the first lens 1210 to adjust its attitude and position, thereby actively calibrating one or more parameters of the optical system, such as field curvature, peak value, astigmatism, and back focus. A connector 13 is then provided on the top surface 11111 of the support portion of the upper lens barrel 111, and / or in the first stepped groove 11121a of the upper lens barrel extension 1112, and / or in the second stepped groove 11121b of the upper lens barrel extension 1112. Finally, the first lens 1210 is bonded to the upper lens barrel 111 and the connector 13 is cured.

[0081] Specifically, in one embodiment, the lens assembly device can pick up the first lens 1210 by adsorption. To avoid affecting imaging, the adsorption location can be the first reflective area 121112 of the light-incident surface 12111 of the first lens 1210, that is, the opaque part of the first lens 1210 is absorbed. In another embodiment, the lens assembly device can pick up the first lens 1210 by clamping. The clamping location can be the structural side 12123 of the first lens 1210. Furthermore, since the optical path design of the light reflection inside the first lens 1210 causes a significant impact on the optical path tilt due to changes in the lens position, it is preferable to align the optical center of the system before active calibration. In some embodiments, the optical centers of the first lens 1210 and the second lens group 122 assembled in the lens barrel 11 are determined by detecting whether the brightness value of the middle pixel of the photosensitive chip 32 has reached its maximum. The position of the first lens 1210 is moved so that the optical axes of the two are aligned on the same straight line. At this time, the entire optical system produces a clearer image. Then, the optical system is actively calibrated to further optimize the image clarity.

[0082] This active calibration allows for adjustment of the relative positions of the first lens 1210 and the second lens group 122 in multiple degrees of freedom. Specifically, in the adjustment method, the first lens 1210 can move relative to the second lens group 122 along the x, y, and z directions (i.e., the relative position adjustment in this embodiment has three degrees of freedom). The z direction is along the optical axis, and the x and y directions are perpendicular to the optical axis. The x and y directions constitute an adjustment plane P, and any translation within this adjustment plane P can be decomposed into two components in the x and y directions.

[0083] It is worth mentioning that, in different embodiments, in addition to the three translational degrees of freedom, the relative position adjustment can also include a rotational degree of freedom, namely, adjustment in the r-direction. The adjustment in the r-direction is a rotation within the adjustment plane P, that is, a rotation about an axis or optical axis perpendicular to the adjustment plane P.

[0084] Furthermore, in another embodiment of active calibration, a relative position adjustment method using the v and w directions is added. Here, the v direction represents the rotation angle in the xoz plane, and the w direction represents the rotation angle in the yoz plane. The rotation angles in the v and w directions can be combined into a vector angle, which represents the overall tilt state. In other words, by adjusting the v and w directions, the relative position of the first lens 1210 and the second lens group 122 can be adjusted in six degrees of freedom.

[0085] Adjusting the six degrees of freedom (x, y, z, r, v, w) mentioned above can all affect the imaging quality of the optical system (e.g., the resolution). In the embodiments of this application, the relative position adjustment method can be to adjust only one of the six degrees of freedom, or a combination of any two or more of them. It should be noted that the active calibration content has been described here, and the active calibration process and principle mentioned below are similar to those described above, and will not be repeated here.

[0086] This application provides a method for assembling a first lens 1210 and a second lens group 122:

[0087] Step S1: Assemble and fix the multiple second lenses 1220 of the second lens group 122 sequentially along the optical axis into the lower lens barrel 112.

[0088] Step S2: Pick up the first lens 1210, and determine the optical center of the first lens 1210 and the second lens group 122 assembled in the lens barrel 11 by detecting whether the brightness value of the middle pixel of the photosensitive chip 32 has reached the maximum. Move the position of the first lens 1210 so that the optical axes of the two are on the same straight line. At this time, the imaging of the entire optical system is clearer.

[0089] Step S3: By actively adjusting the relative position between the first lens 1210 and the second lens group 122 in at least one direction (at least one direction refers to at least one of the six axes xyz (horizontal vertical direction) and uvw (rotation directions around the x, y, and z axes, respectively), the imaging quality (mainly including optical parameters such as back focus, aberration, and resolution) of the optical lens 10 reaches the target value after one or more adjustments.

[0090] Step S4: A connector 13 is provided between the first lens 1210 and the lens barrel 112, so that the first lens 1210 and the second lens group 122 are fixed and maintained in the relative position determined by the active calibration.

[0091] The optical lens 10 further includes a protective member 14, which includes a protective member support portion 141 and a protective member extension portion 142. The top surface 11111 of the support portion of the upper lens barrel support portion 1111 further has a support portion groove 111111. The protective member support portion 141 has a shape that fits into the support portion groove 111111. A connecting medium is arranged in the support portion groove 111111 to fix the relative position of the bottom surface 11112 of the protective member support portion 141 and the top surface 11111 of the support portion of the upper lens barrel support portion 11111.

[0092] The protective member 14 includes an inner side surface 1411, an outer side surface 1412, and a bottom surface 1413 of the protective member support portion. The bottom surface 1413 connects the inner side surface 1411 and the outer side surface 1412 of the protective member support portion. After the protective member 14 is connected to the upper lens barrel portion 111, the inner side surface 1411 of the protective member support portion maintains a gap of 500-1000 μm with the structural side surface 12123 of the first lens 1210. The bottom surface 1423 of the protective member extension portion has a stepped structure. The bottom surface 1423 and the side surface 1422 of the protective member extension portion together form a continuous mating shape similar to the structural top surface 12121 and the structural side surface 12123 of the first lens 1210, and maintain a gap of 40-100 μm. That is, the protective component 14 and the first lens 1210 are not in contact with each other, but maintain a certain distance between them, so as to provide the protective component 14 with a certain buffer space when subjected to horizontal or vertical impact, and avoid transmitting the impact to the first lens 1210 and causing it to loosen, fall off, crack or other damage.

[0093] The protective member 14 also has a top surface 1421 of a protective member extension, which is not lower than the light-incident surface 12111 of the first lens 1210 to prevent the first lens 1210 from being impacted from the side. Preferably, the top surface 1421 of the protective member extension is flush with the light-incident surface 12111 of the first lens 1210 to minimize the overall height.

[0094] In one embodiment of this application, the top surface 12121 of the structural portion 1212 of the first lens 1210 is recessed to form an annular groove 12124. The annular groove 12124 provides a clearance space for the protective member 14, thereby reducing the overall height of the camera module. The annular groove 12124 has an "L" shape when viewed in cross-section.

[0095] like Figure 5A and Figure 5B As shown, in one embodiment of this application, the lens barrel 11 is a split lens barrel, with the upper lens barrel portion 111 and the lower lens barrel portion 112 being independent components. The upper lens barrel portion 111 and the lower lens barrel portion 112 are fixed together by a connecting medium 80 (such as adhesive). This allows the first lens group 121 and the second lens group 122 to form a complete optical system. An adjustable gap exists between the upper lens barrel portion 111 and the lower lens barrel portion 112 for actively calibrating the first lens 1210 relative to the second lens group 122 in the direction along the optical axis and in the direction tilted to the optical axis. The upper lens barrel portion 111 forms a first lens receiving cavity 1101 around the lens barrel, and has an opening, resulting in a structure that decreases in size from top to bottom. The first lens group 121 is disposed within the first lens receiving cavity 1101. The lower lens barrel portion 112 surrounds a second lens receiving cavity 1102. The lower lens barrel portion 112 has an opening and a structure that increases in size from top to bottom. The top of the second lens receiving cavity 1102 extends through the inner extension portion 1121 of the lower lens barrel and communicates with the bottom of the first lens receiving cavity 1101, forming a passage for light to pass through. A second lens group 122 is disposed within the second lens receiving cavity 1102. The first lens group 121 further includes a first lens 1210, and the second lens group 122 includes at least one second lens 1220. The maximum outer diameter of the upper lens barrel portion 111 is larger than the maximum outer diameter of the lower lens barrel portion 112.

[0096] Furthermore, the upper lens barrel portion 111 includes an upper lens barrel support portion 1111 and an upper lens barrel extension portion 1112, the upper lens barrel extension portion 1112 extending integrally from the upper lens barrel support portion 1111 toward the image side. The upper lens barrel support portion 1111 forms an upper receiving cavity, and the upper lens barrel extension portion 1112 forms a lower receiving cavity, wherein the size of the upper receiving cavity is larger than the size of the lower receiving cavity. The lower lens barrel portion 112 includes a lower lens barrel inner extension portion 1121 and a lower lens barrel body 1122. An adjustable gap is provided between the lower extension surface 11122 of the upper lens barrel extension portion 1112 and the top surface of the lower inner extension portion of the lower lens barrel inner extension portion 1121, which is an adjustment margin during active calibration. After active calibration is completed, a connecting medium 80 is provided in the gap for fixation. The lower lens barrel inner extension 1121 has a lens barrel opening 1103, which connects the first lens receiving cavity 1101 and the second lens receiving cavity 1102 and is adapted to allow light to pass through.

[0097] The upper lens barrel support 1111 carries the structural portion 1212 of the first lens 1210, and the upper lens barrel extension 1112 carries the optical portion 1211 of the first lens 1210. The upper extension surface 11121 of the upper lens barrel extension 1112 may have a shape similar to the light-emitting side surface 12112 of the first lens 1210 to better support the first lens 1210 and evenly distribute stress. In one embodiment of this application, the first lens 1210 is fitted into the upper lens barrel 111, and a connecting medium is further provided between the first lens 1210 and the upper lens barrel 111 to increase the connection strength between the first lens 1210 and the upper lens barrel 111. In another embodiment of this application, the first lens 1210 is fixed to the upper extension surface 11121 of the lens barrel by a connector 13. The connector 13 includes at least one first medium 131, and the upper extension surface 11121 of the lens barrel may further have at least one first stepped groove 11121a for accommodating the first medium 131. The first medium 131 can be arranged in the first stepped groove 11121a to fix the relative position of the upper extension surface 11121 of the lens barrel and the light-emitting side surface 12112 of the first lens 1210. It is understood that in this application, the connecting medium 80 and the connector 13 can be the same adhesive medium, such as glue, or the connecting medium 80 and the connector 13 can be different adhesive substances.

[0098] During assembly, the multiple second lenses 1220 of the second lens group 122 are first assembled and fixed in the lower lens barrel 112 along the optical axis. The first lens group 121 is then installed inside the upper lens barrel 111. Specifically, the upper lens barrel 111 includes a support boss 111112, and the structural side surface 12123 of the first lens 1210 engages with the inner side surface 111112b of the support boss. Preferably, a connector 13 can also be provided at the step formed by the top surface 111112a of the support boss and the structural side surface 12123 of the first lens 1210, and / or a connector 13 can be provided in the first step groove 11121a of the upper lens barrel extension 1112 to further strengthen the connection between the two. Adjust the relative positions of the upper lens barrel 111 with the first lens 1210 assembled and the lower lens barrel 112 with the second lens group 122 assembled, actively calibrate one or more parameters of the optical system such as field curvature, peak value, and astigmatism, optimize the image sharpness, then set the connecting medium 80 (e.g., glue) on the top surface of the lower inner extension of the lower lens barrel 112, and finally bond the upper lens barrel 111 and the lower lens barrel 112 together and cure the connecting medium 80.

[0099] Specifically, in one embodiment, the lower lens barrel portion 112 is fixed, and the lens assembly device picks up the upper lens barrel portion 111 on which the first lens 1210 is assembled by adsorption. In order not to affect imaging, the adsorption position can be the first reflective area 121112 of the light-incident surface 12111 of the first lens 1210, that is, to absorb the opaque part of the first lens 1210. In another embodiment, the lower lens barrel portion 112 is fixed, and the lens assembly device picks up the upper lens barrel portion 111 on which the first lens 1210 is assembled by clamping. The clamping position can be the outer side surface 111112c of the support boss of the upper lens barrel portion 111. In another embodiment, the lower lens barrel portion 112 is fixed, and the lens assembly device picks up the upper lens barrel portion 111, on which the first lens 1210 is assembled, using a clamping method. The upper lens barrel portion 111 further includes an upper lens barrel clamping portion 1114, which extends downward from the upper lens barrel extension portion 1112. The upper lens barrel clamping portion 1114 extends integrally from the lower extension surface 11122 of the upper lens barrel extension portion 1112 in a direction away from the first lens 1210. A cylindrical upper lens barrel clamping surface 11141 is formed on the outer side of the upper lens barrel clamping portion 1114. The diameter of the upper lens barrel clamping surface 11141 is much smaller than the outer diameter of the first lens 1210. The maximum outer diameter of the upper lens barrel clamping part 1114 is smaller than the maximum outer diameter of the support part of the upper lens barrel 111. It can be understood that the diameter of the upper lens barrel clamping surface 11141 is also much smaller than the diameter of the outer side surface 111112c of the support part boss of the upper lens barrel 111. The lens assembly equipment clamps the upper lens barrel clamping surface 11141 to adjust the posture and position of the upper lens barrel 111 with the first lens 1210 assembled on it. The small clamping radius helps to reduce the clamping torque, thereby reducing the amount of variation caused by the clamping action to the first lens 1210. In another embodiment, the upper lens barrel 111 is fixed, and the lens assembly device picks up the lower lens barrel 112, on which the second lens group 122 is assembled, using a clamping method. It is understood that the maximum outer diameter of the lower lens barrel 112 is much smaller than the outer diameter of the first lens 1210. The lens assembly device can clamp the outer surface of the lower lens barrel 112 to adjust the posture and position of the lower lens barrel 112 on which the second lens group 122 is assembled. The small clamping radius helps to reduce the clamping torque, thereby reducing the amount of variation caused to the second lens group 122 by the clamping action. Furthermore, since the optical path design of the light reflection inside the first lens 1210 causes a significant impact of changes in lens position on the optical path tilt, it is preferable to align the optical center of the system before the active calibration action. The optical centers of the first lens 1210 assembled in the upper lens barrel 111 and the second lens group 122 assembled in the lower lens barrel 112 are determined by detecting whether the brightness value of the middle pixel of the photosensitive chip 32 reaches the maximum. Either one of them is moved so that their optical axes are on the same straight line. At this time, the entire optical system images are relatively clear. Then, the optical system is actively calibrated to further optimize the image clarity.

[0100] The optical lens 10 further includes a protective member 14 disposed outside the first lens 1210. The protective member 14 includes a protective member support portion 141 and a protective member extension portion 142. The protective member extension portion 142 extends integrally from the protective member support portion 141 towards the optical axis. The protective member support portion 141 is fixed to the upper lens barrel support portion 1111. The top surface 11111 of the support portion of the upper lens barrel support portion 11111 further has a support portion groove 111111. The protective member support portion 141 has a shape that fits into the support portion groove 1111111 and the outer side surface 111112c of the support portion boss. A connecting medium is arranged in the support portion groove 111111 to fix the relative position of the bottom surface 11112 of the protective member support portion 141 and the top surface 11111 of the support portion of the upper lens barrel support portion 11111.

[0101] After the protective member 14 is connected to the upper lens barrel portion 111, the inner surface of the protective member support portion 141 maintains a gap of 500-1000 μm with the first lens 1210, and the bottom surface of the protective member extension portion 142 maintains a gap of 40-100 μm with the first lens 1210. Specifically, the inner surface 1411 of the protective member support portion maintains a gap of 500-1000 μm with the structural side 12123 of the first lens 1210, and the inner surface 1411 of the protective member support portion and the outer surface 111112c of the support portion boss can be in a close fit. In another embodiment of this application, the inner surface 1411 of the protective member support portion and the outer surface 111112c of the support portion boss can also have a certain gap. The bottom surface 1423 of the protective member extension has a stepped structure. The bottom surface 1423 and the side surface 1422 of the protective member extension together form a continuous mating shape similar to the top surface 12121 and the side surface 12123 of the first lens 1210, and maintain a gap of 40-100 μm. That is, the protective member 14 and the first lens 1210 are not in contact with each other, but maintain a certain distance between them to provide a certain buffer space for the protective member 14 when subjected to horizontal or vertical impact, so as to avoid transmitting the impact to the first lens 1210 and causing damage such as loosening, falling off, or cracking.

[0102] The protective member 14 also has a top surface 1421 of a protective member extension, which is not lower than the light-incident surface 12111 of the first lens 1210 to prevent the first lens 1210 from being impacted from the side. Preferably, the top surface 1421 of the protective member extension is flush with the light-incident surface 12111 of the first lens 1210 to minimize the overall height.

[0103] like Figure 8A and9B As shown, in one embodiment of this application, the lens barrel 11 is a split lens barrel, with the upper lens barrel portion 111 and the lower lens barrel portion 112 being independent components. The upper lens barrel portion 111 is fixed to the lower lens barrel portion 112, and the coefficient of thermal expansion of the upper lens barrel portion 111 is between that of the first lens 1210 and the lower lens barrel portion 112. Specifically, the upper lens barrel portion 111 and the lower lens barrel portion 112 are fixed together by a connecting medium (e.g., an adhesive medium), thereby forming a complete optical system from the first lens group 121 and the second lens group 122.

[0104] The lens barrel 11 includes an upper lens barrel portion 111 and a lower lens barrel portion 112. The upper lens barrel portion 111 includes an upper lens barrel support portion 1111, an upper lens barrel extension portion 1112 and an upper lens barrel inner extension portion 1113. The upper lens barrel extension portion 1112 extends upward integrally from the upper lens barrel support portion 1111, and the upper lens barrel inner extension portion 1113 extends inward integrally from the upper lens barrel extension portion 1112. Specifically, in this embodiment, the upper lens barrel support 1111 is integrally formed on the lower extension surface 11122 of the upper lens barrel extension 1112 and extends away from the optical axis. The inner extension 1113 of the upper lens barrel is integrally formed on the upper extension surface 11121 of the upper lens barrel extension 1112 and extends towards the optical axis. Thus, the upper lens barrel support 1111, the upper lens barrel extension 1112, and the inner extension 1113 of the upper lens barrel form a first lens receiving cavity 1101, and the first lens 1210 is received in the first lens receiving cavity 1101. The inner diameter of the inner extension 1113 of the upper lens barrel is smaller than the maximum outer diameter of the first lens 1210. Herein, upward refers to the direction towards the object side, downward refers to the direction towards the image side, inward refers to the direction close to the optical axis, and outward refers to the direction away from the optical axis. (Refer to...) Figure 1A As shown, 101 is the object side of the optical lens, and 102 is the image side of the optical lens.

[0105] The upper lens barrel inner extension 1113 includes an upper inner extension top surface 11131, an upper inner extension inclined surface 11132, and an upper inner extension bottom surface 11133. The upper inner extension bottom surface 11133 is provided with a fitting groove 111331, and the first lens 1210 is fitted into the fitting groove 111331. The first lens 1210 is fitted and connected to the upper lens barrel 111 through the top surface 12121 and the fitting groove 111331, thereby fixing the first lens 1210 to the upper lens barrel 111. In order to strengthen the fixation between the first lens 1210 and the upper lens barrel 111, adhesive is also provided between the structural bottom surface 12122 of the first lens 1210 and the side wall of the upper lens barrel extension 1112. In various temperature-related reliability tests, the increased ambient temperature causes overall thermal expansion of the optical lens 10, resulting in changes in the dimensions of the adhesive, lens barrel 11, and first lens 1210. Under normal circumstances, the coefficient of thermal expansion of the adhesive is 90-110, that of glass lenses is around 10, that of plastic lenses is around 60, and that of the lower lens barrel 112 is around 80. Under high-temperature conditions, the deformation of the adhesive material is the greatest. Furthermore, if the first lens 1210 is made of glass, due to the relatively low coefficient of thermal expansion of glass, under high-temperature conditions, such as 85 degrees Celsius, the deformation of the first lens 1210 is much smaller than that of the adhesive material. This could cause the adhesive material to shift from its fixed position to that of the lower lens barrel 112, potentially leading to the risk of the first lens 1210 detaching. Therefore, the coefficient of thermal expansion of the upper lens barrel 111 is chosen to be between that of the first lens 1210 and the lower lens barrel 112. In one embodiment of this application, the first lens 1210 is made of glass, the lower lens barrel 112 is made of PC (polycarbonate), and the coefficient of thermal expansion of the upper lens barrel 111 is between that of glass and PC (polycarbonate), ranging from 40 to 50. Adhesive is disposed between the bottom surface 12122 of the first lens 1210 and the sidewall of the upper lens barrel extension 1112, forming a right angle. This reduces deformation of the adhesive due to baking in high-temperature environments, effectively preventing the first lens 1210 from detaching due to heat deformation, thereby improving the production yield of the camera module. The upper lens barrel 111 acts as a buffer between the first lens 1210 and the lower lens barrel 112, avoiding delamination and separation caused by a large difference in the coefficients of thermal expansion between the two parts.

[0106] A gap exists between the upper lens barrel support 1111 and the lower lens barrel 112, and this gap is filled with a connecting medium to fix the upper lens barrel 111 and the lower lens barrel 112. The projection of the connecting medium along the optical axis is located outside the projection of the first lens 1210 along the optical axis, and the projection of the connecting medium along the optical axis does not overlap with the projection of the first lens 1210 along the optical axis. The bottom surface 11112 of the support portion of the upper lens barrel support 1111 is bonded and fixed to the top surface of the lower lens barrel 112 by a connecting medium (e.g., glue). The top surface of the lower lens barrel 112 is a flat surface, and the side of the top surface of the lower lens barrel 11 has a lower lens barrel extension 1125. The lower lens barrel extension 1125 extends towards the object side, so that the upper lens barrel support 1111 and the lower lens barrel extension 1125 can cooperate with each other to enable the upper lens barrel support 1111 and the lower lens barrel extension 1125 to cooperate with each other. The relative positions of the upper lens barrel 111 and the lower lens barrel 112 are maintained at the relative positions determined by active calibration, and the lower lens barrel extension 1125 can also be used to clamp the camera module during assembly to prevent the camera module from falling off during assembly; the bottom surface 11112 of the support portion of the upper lens barrel support portion 1111 and the top surface of the lower lens barrel 112 are also provided with adhesive to strengthen the fixation of the upper lens barrel 111 and the lower lens barrel 112.

[0107] In this embodiment, the lower lens barrel portion 112 includes a lower lens barrel inner extension portion 1121 and a lower lens barrel body 1122. An adjustable gap exists between the lower extension surface 11122 of the upper lens barrel extension portion 1112 and the top surface of the lower inner extension portion of the lower lens barrel inner extension portion 1121. This gap provides adjustment margin during active calibration. After active calibration, a connecting medium 80 is placed in the gap for fixation. The lower lens barrel inner extension portion 1121 has a lens barrel opening 1103, which connects to the first lens receiving cavity 1101 and the second lens receiving cavity 1102, and is adapted to allow light to pass through.

[0108] The lower lens barrel portion 112 includes a second lens receiving cavity 1102 with an inner diameter increasing from top to bottom, and the plurality of second lenses 1220 are mounted in the second lens receiving cavity 1102 from top to bottom. Here, in the embodiment of this application, the upper part of the second lens 1220 indicates the direction in which the second lens 1220 faces the object side, and the lower part of the second lens 1220 indicates the direction in which the second lens 1220 faces the image side. It should be observed that the top of the second lens receiving cavity 1102 has an opening to partially expose the second lens 1220 located at the topmost side.

[0109] Furthermore, according to embodiments of this application, an assembly method for an optical lens 10 is provided, comprising:

[0110] Step S1, preparation step. The upper lens barrel 111, lower lens barrel 112, first lens 1210 and multiple second lenses 1220 are separated from each other. The top surface 12121 of the first lens 1210 is first fitted with the upper lens barrel 111 through the fitting groove 111331, and then a connecting medium is applied between the bottom surface 12122 of the first lens 1210 and the upper lens barrel 111 for fixation; the multiple second lenses 1220 are installed in the lower lens barrel 112.

[0111] Step S2, pre-positioning step. The upper lens barrel 111 with the first lens 1210 assembled and the lower lens barrel 112 with the second lens 1220 assembled are pre-positioned and the optical center is found. The first group of lenses 15 is moved and adjusted to the position where the light spot is brightest, that is, the optical axis of the first group of lenses 15 coincides with the optical axis of the second group of lenses 16, so that the first lens 1210 and the multiple second lenses 1220 together form an optical system that can form a relatively clear image.

[0112] Step S3, Active Calibration Step. By actively adjusting the relative position between the first lens 1210 and the second lens group 122 in at least one direction (at least one direction refers to at least one of the six axes xyz (horizontal vertical direction) and uvw (rotation directions around the x, y, and z axes, respectively), the imaging quality (mainly including optical parameters such as back focus, aberration, and resolution) of the optical lens 10 reaches the target value after one or more adjustments; the relative position of the upper lens barrel 111 on which the first lens 1210 is assembled and the lower lens barrel 112 on which the second lens 1220 is assembled is adjusted and determined based on the active calibration.

[0113] Step S4, bonding step. The bottom surface 11112 of the support part and the top surface of the lower lens barrel part 112 are bonded together by a connecting medium, so that the upper lens barrel part 111 with the first lens 1210 assembled and the lower lens barrel part 112 with the second lens 1220 assembled are fixed and maintained in the relative position determined by active calibration.

[0114] First, the optical center between the lens groups is determined by translation. Then, the imaging quality of the optical lens 10, such as back focus, aberration, and resolution, is adjusted by active calibration, as well as factors that are detrimental to the fitting accuracy and imaging quality, such as eccentricity, air gap, and tilt. This makes the positional relationship between the upper lens barrel 111 and the lower lens barrel 112 in this embodiment more accurate and significantly improves the fitting accuracy and imaging quality.

[0115] The optical lens 10 further includes a protective member 14, which is disposed on the periphery of the upper lens barrel portion 111, and a gap is left between the protective member 14 and the upper lens barrel portion 111. The protective member 14 includes a protective member support portion 141 and a protective member extension portion 142. The protective member extension portion 142 can be integrally formed on the top surface of the protective member support portion 141 of the protective member 14 and extends in the direction of the optical axis. The protective member support portion 141 can be tightly fitted with the lower lens barrel extension portion 1125. The protective member support portion 141 surrounds the side wall of the upper lens barrel extension portion 1112, and the protective member extension portion 142 covers the top surface of the upper lens barrel inner extension portion 1113. Therefore, the protective member 14 completely covers the upper lens barrel portion 111, and there is a gap between the protective member 14 and the upper lens barrel portion 111. That is, the protective member 14 and the upper lens barrel portion 111 are not in contact with each other, and a certain distance is maintained between them to provide a certain buffer space for the protective member 14 when subjected to horizontal or vertical impact, so as to avoid transmitting the impact to the upper lens barrel portion 111 and causing damage to it.

[0116] Exemplary drive motor

[0117] Figure 3A , Figure 3B , Figure 6A , Figure 6B , Figure 9A and Figure 9B This is a schematic diagram of the structure of a camera module that includes a lens drive motor, such as... Figure 3A , Figure 3B , Figure 6A , Figure 6B , Figure 9A and Figure 9B As shown, the lens drive motor 20 is disposed on the outer periphery of the lower lens barrel portion 112, and the lens drive motor 20 drives the optical lens 10 to move. The lens drive motor 20 is adapted to drive the optical lens 10 to translate and / or rotate, thereby realizing the lens focusing, lens stabilization and other functions of the camera module.

[0118] The lens drive motor 20 includes a lens fixing part 21, a lens movable part 22, a lens drive assembly 23, and a lens circuit assembly (not shown). The lens fixing part 21 has a receiving cavity to accommodate the lens movable part 22, the lens drive assembly 23, and the lens circuit assembly. The lens circuit assembly provides power to the lens drive assembly 23, which drives the lens movable part 22 to move relative to the lens fixing part 21. The optical lens 10 is fixed to the lens movable part 22, so that the lens drive assembly 23 drives the optical lens 10 to move relative to the lens fixing part 21. For example, driving the optical lens 10 to move along its optical axis to achieve lens focusing; or driving the optical lens 10 to translate in a direction perpendicular to its optical axis or driving the optical lens 10 to rotate about a direction perpendicular to its optical axis to achieve lens image stabilization. Furthermore, the lens drive motor 20 is fixed to the photosensitive assembly 30 through the lens fixing part 21, so that the optical lens 10 is positioned on the photosensitive path of the photosensitive assembly 30.

[0119] In this embodiment, the lens drive motor 20 can drive the entire optical lens 10 to move, or it can drive a group of optical lenses 10 to move, for example, drive the second group of lenses 16 to move.

[0120] In one embodiment of this application, the lens fixing part 21 includes a housing 211 and a base 212, which are fastened together to form a receiving cavity to accommodate the various components in the lens drive motor 20. This not only protects the components in the lens drive motor 20 from impact damage, but also prevents dust, dirt, or stray light from entering the interior of the chip drive motor 40. Furthermore, the housing 211 and the base 212 are provided with openings corresponding to the optical lens 10, so that light reflected from an object can reach the photosensitive component 30 through the optical lens 10. It should be understood that in this specific embodiment, the housing 211 and the base 212 are both stators or relatively fixed parts, that is, when the lens drive motor 20 is working, the housing 211 and the base 212 remain stationary.

[0121] In one embodiment of this application, the movable lens portion 22 includes a first movable lens carrier 221 and a second movable lens carrier 222. The first movable lens carrier 221 is housed within the second movable lens carrier 222, which is housed within a housing 211. The optical lens 10 is fixed to the first movable lens carrier 221. In a specific example of this application, the lens driving assembly 23 can drive the first movable lens carrier 221 to move along the optical axis, thereby moving the optical lens 10 to achieve optical focusing; the lens driving assembly 23 can also drive the second movable lens carrier 222 to move along a direction perpendicular to the optical axis, thereby moving both the first movable lens carrier 221 and the optical lens 10 to achieve optical image stabilization. In another specific example of this application, the lens drive assembly 23 can drive the first lens movable carrier 221 to move along a direction perpendicular to the optical axis, thereby moving the optical lens 10 to achieve optical image stabilization; the lens drive assembly 23 can also drive the second lens movable carrier 222 to move along the optical axis, thereby moving the first lens movable carrier 221 and the optical lens 10 to achieve optical focusing. That is, under the drive of the lens drive assembly 23, the first lens movable carrier 221 can move independently relative to the second lens movable carrier 222, and the first lens movable carrier 221 can also move together with the second lens movable carrier 222.

[0122] The first lens movable carrier 221 includes a first lens carrier body 2211 and a first lens carrier extension 2212. The first lens carrier extension 2212 extends integrally from the first lens carrier body 2211 toward the object side, that is, the first lens carrier extension 2212 is disposed near the object side, and the first lens carrier body 2211 is disposed near the image side. Furthermore, the maximum outer diameter of the first lens carrier extension 2212 is larger than the maximum outer diameter of the first lens carrier body 2211, so as to adapt to the structure of the optical lens 10, which is larger at the top and smaller at the bottom.

[0123] In this application, a light inlet hole 2201 is formed in the middle of the first lens carrier extension 2212, and a light outlet hole 2202 is formed in the middle of the first lens carrier body 2211. The size of the light inlet hole 2201 is larger than the size of the light outlet hole 2202, so that the optical lens 10 can be directly placed in the first lens movable carrier 221 from the object side to the image side, making the installation simpler.

[0124] Furthermore, in this application, the optical lens 10 can be supported and fixed by the first lens carrier body 2211 and / or the first lens carrier extension 2212. For example, in a specific example of this application, the bottom surface 11112 of the support portion of the upper lens barrel 111 rests against the top surface of the first lens carrier extension 2212, so that the larger first lens carrier extension 2212 provides a larger supporting area for the first lens 1210 of the optical lens 10, making the optical lens 10 more stable and preventing tilting and shaking when driven. In another specific example of this application, the outer wall of the lower lens barrel 112 rests against the first lens carrier body 2211. The smaller lateral dimension of the lower lens barrel 11 allows for a smaller size of the first lens carrier body 2211, which, while providing more stable support for the optical lens 10, can further reduce the lateral dimension of the lens drive motor 20. In one embodiment of this application, a lens driving assembly 23 is disposed between a movable lens portion 22 and a fixed lens portion 21, driving the movable lens portion 22 to move relative to the fixed lens portion 21. The lens driving assembly 23 includes a lens coil assembly 231 and a lens magnet assembly 232, wherein the lens coil assembly 231 includes a first lens coil assembly 2311 and a second lens coil assembly 2312. The first lens coil assembly 2311 and the lens magnet assembly 232 are disposed opposite each other, and the second lens coil assembly 2312 and the lens magnet assembly 232 are disposed opposite each other. At least one of the three components—the first lens coil assembly 2311, the second lens coil assembly 2312, and the lens magnet assembly 232—is disposed on either the movable lens portion 22 or the fixed lens portion 21. It is understood that the first lens coil assembly 2311 and the lens magnet assembly 232 can be disposed opposite each other in the horizontal direction or in the vertical direction, and the second lens coil assembly 2312 and the lens magnet assembly 232 can also be disposed opposite each other in the horizontal direction or in the vertical direction.

[0125] It is understood that in this application, the first lens 1210 and the second lens group 122 of the optical lens 10 have a large size difference. By placing the lens drive assembly 23 on the outer periphery of the lower lens barrel 112, the occupancy of the lens drive motor 20 on the lateral space of the camera module can be reduced, thereby reducing the lateral size of the camera module.

[0126] In a specific example of this application, the first lens coil assembly 2311 is disposed on the first lens movable carrier 221, the lens magnet assembly 232 is disposed on the second lens movable carrier 222, and the second lens coil assembly 2312 is disposed on the lens fixing part 21. When the first lens coil assembly 2311 is energized, the magnetic field generated interacts with the magnetic field of the lens magnet assembly 232, generating a driving force to move the first lens movable carrier 221. When the second lens coil assembly 2312 is energized, the magnetic field generated interacts with the magnetic field of the lens magnet assembly 232, generating a driving force to drive the second lens movable carrier 222, thereby moving the first lens movable carrier 221. Of course, the positions of the first lens coil assembly 2311 and the second lens coil assembly 2312 can be interchanged; that is, the second lens coil assembly 2312 can be disposed on the first lens movable carrier 221, and the first lens coil assembly 2311 can be disposed on the lens fixing part 21.

[0127] In one embodiment of this application, the lens circuit assembly (not shown) includes a first lens coil conductive member and a second lens coil conductive member, wherein the first lens coil conductive member is electrically connected to the first lens coil, and the second lens coil conductive member is electrically connected to the second lens coil. Further, in a specific example of this application, the first lens coil conductive member and the second lens coil conductive member are electrically connected to the circuit board 31 of the photosensitive assembly 30 to achieve circuit conduction of the lens drive motor 20; in another specific example of this application, a circuit structure can also be provided on the substrate, integrating the first and second lens coil conductive members on the substrate, and achieving conduction between the lens drive motor 20 and external circuits through the circuit structure of the substrate.

[0128] In this application, the lens drive assembly 23 is able to provide greater thrust to meet the greater travel requirements of the optical lens 10 for optical focusing and / or optical image stabilization.

[0129] In one embodiment of this application, the lens drive motor 20 further includes a lens holding assembly 24, which further includes a lens support assembly 241. The lens support assembly 241 is disposed between the first movable lens carrier 221 and the second movable lens carrier 222, and between the second movable lens carrier 222 and the lens fixing part 21, to improve the stability of the movement of the lens drive motor 20 during optical focusing and / or optical image stabilization, thereby improving image quality. Furthermore, the support assembly includes a ball bearing 2411 and a lens ball groove. The lens ball groove is formed on the surfaces of the first movable lens carrier 221, the second movable lens carrier 222, and the lens fixing part 21. The ball bearing 2411 is disposed within the lens ball groove to support the first movable lens carrier 221 and the second movable lens carrier 222, thereby enabling the first movable lens carrier 221 and the second movable lens carrier 222 to move smoothly.

[0130] In one embodiment of this application, the lens drive motor 20 further includes a lens position sensing component (not shown), wherein the lens sensing component includes a lens position sensing element. In a specific example of this application, the lens position sensing element is disposed on the same side as the lens coil assembly 231 and opposite to the lens magnet assembly 232, and is used to acquire the position information of the lens magnet assembly 232. The number of lens sensing elements is at least three, and the three lens position sensing elements are respectively used to sense the position information of the movable lens carrier moving along the X-axis, Y-axis, and Z-axis directions.

[0131] In this application, the lens drive motor 20 drives the optical lens 10 to move, achieving optical focusing with a travel distance of 200um-400um; the lens drive motor 20 drives the optical lens 10 to move, achieving optical image stabilization with a travel distance of ±100um.

[0132] In the application, the lens drive motor 20 can be a back focus motor 50 used only to drive the movement of a portion of the optical lens. Since the back focus motor 50 is only used to drive the movement of a portion of the optical lens, its size and weight can be smaller, and its driving force requirement can be lower.

[0133] Specifically, such as Figures 4A to 4C , Figures 7A to 7C , Figures 10A to 10CAs shown, the second lens group 122 includes multiple second lenses 1220. At least one second lens 1220 near the image side acts as a compensation lens and moves relative to the other second lenses 1220. The at least one second lens 1220 closest to the photosensitive element 30 among the multiple second lenses 1220 in the second lens group 122 can act as a compensation lens and move relative to the other second lenses 1220. This changes the position of the compensation lens relative to the other second lenses 1220, thereby achieving back focus compensation and / or optical image stabilization, resulting in clear imaging. In this application, since the first lens 1210 has a relatively large size, and in some embodiments of this application, the first lens 1210 is made of glass, resulting in a relatively large weight. Consequently, the optical lens 10 with the first lens 1210 is also relatively heavy. Therefore, using the method of driving the compensation lens to move for back focus compensation and / or optical image stabilization can reduce the demand for driving force, and correspondingly, a lower-cost and smaller drive motor can be used.

[0134] In this application, the back focus motor 50 drives the compensation lens to move. The lens barrel 11 of the optical lens 10 to which the back focus motor 50 is applied can be a one-piece lens barrel or a separate lens barrel. In other words, regardless of whether the upper lens barrel portion 111 and the lower lens barrel portion 112 of the optical lens 10 are integrally formed by injection molding or separately formed and then fixed by a connecting medium 80 (adhesive or other bonding medium), the compensation lens can be driven to move relative to the other second lenses 1220 by the back focus motor 50. The back focus motor 50 and the optical lens 10 form an optical lens assembly, that is, the optical lens assembly includes the back focus motor 50 and the optical lens 10, and the back focus motor 50 can drive the compensation lens of the optical lens 10 to move.

[0135] Specifically, the lower lens barrel 112 includes a first lower lens barrel 1123 and a second lower lens barrel 1124, wherein the compensating lens is fixed to the second lower lens barrel 1124 to form a second group of lenses 16; the second lens 1220 is fixed to the first lower lens barrel 1123, and the first lens 1210 is fixed to the upper lens barrel 111, wherein the upper lens barrel 111 and the first lower lens barrel 1123 are fixed to form a first group of lenses 15. In other words, at least one second lens 1220 in the second lens group 122, located near the photosensitive component 30, is fixed to the second lower lens barrel 1124 as a compensation lens to form the second lens group 16; the remaining second lenses 1220 in the second lens group 122, excluding the compensation lens, are fixed to the first lower lens barrel 1123, and the first lens group 121 is fixed to the upper lens barrel portion 111. The upper lens barrel portion 111 and the first lower lens barrel 1123 are fixed together by integral molding or by bonding with an adhesive medium to form the first lens group 15. In one embodiment of this application, the compensation lens is disposed near the image plane side of the optical lens 10, which is more conducive to achieving the effect of field curvature and back focus compensation correction.

[0136] In other words, the optical lens 10 includes a first group of lenses 15 and a second group of lenses 16, the second group of lenses 16 being located on the side of the optical lens 10 closer to the photosensitive element, and the second group of lenses 16 being driven to move relative to the first group of lenses 15.

[0137] In one embodiment of this application, the camera module further includes a back focus motor 50 for driving the movement of the second group of lenses 16. The back focus motor 50 includes a back focus motor fixed part 51, a back focus motor movable part 52, and a back focus motor drive assembly 53 disposed between the back focus motor fixed part 51 and the back focus motor movable part 52. The back focus motor drive assembly 53 connects the back focus motor fixed part 51 and the back focus motor movable part 52 and drives the back focus motor movable part 52 to move relative to the back focus motor fixed part 51. The second group of lenses 16 is disposed on the back focus motor movable part 52, and the second group of lenses 16 is driven by the back focus motor drive assembly 53 to move relative to the first group of lenses 15, thereby adjusting the back focus distance of the optical lens 10. The back focus motor drive assembly 53 can be a coil-magnet pair, SMA wire, piezoelectric element, or stepper motor, etc., and this application is not limited to this.

[0138] Reference Figure 4A , Figure 7A and Figure 10AAs shown, the camera module also includes a lens support 60, which is disposed between the optical lens 10 and the photosensitive assembly 30. The first group of lenses 15 is directly or indirectly fixed to the photosensitive assembly 30 via the lens support 60. For example, the first group of lenses 15 is fixed to the lens support 60 by providing a connecting medium (adhesive such as glue), and the lens support 60 is fixed to the filter element bracket 34 of the photosensitive assembly 30 by providing a connecting medium 80 (adhesive such as glue). Thus, the first group of lenses 15 is fixed to the photosensitive assembly 30 via the lens support 60. The back focus motor 50 is directly or indirectly fixed to the photosensitive assembly 30. For example, the back focus motor fixing part 51 of the back focus motor 50 is fixed to the filter element bracket 34 of the photosensitive assembly 30 by providing a connecting medium 80 (adhesive such as glue). Thus, both the lens support 60 and the back focus motor 50 are fixed to the photosensitive assembly 30. In other words, the first group of lenses 15 is fixed to the photosensitive assembly 30 via the lens support 60, and the back focus motor 50 is fixed to the photosensitive assembly 30. The second group of lenses 16 is fixed to the photosensitive assembly 30 via the back focus motor 50.

[0139] Reference Figure 4B , Figure 7B and Figure 10B As shown, the camera module also includes a lens support 60, which is disposed between the optical lens 10 and the photosensitive assembly 30. The first group of lenses 15 is directly or indirectly fixed to the photosensitive assembly 30 through the lens support 60. For example, the first group of lenses 15 is fixed to the lens support 60 by providing a connecting medium (adhesive such as glue), and the lens support 60 is fixed to the filter element bracket 34 of the photosensitive assembly 30 by providing a connecting medium 80 (adhesive such as glue). Thus, the first group of lenses 15 is fixed to the photosensitive assembly 30 through the lens support 60. The back focus motor 50 is fixed to the lens support 60. For example, the back focus motor fixing part 51 of the back focus motor 50 is provided with a connecting medium 80 (adhesive such as glue) between it and the lens support 60, thus the back focus motor 50 is indirectly fixed to the photosensitive assembly 30 through the lens support 60. Thus, in this embodiment, the back focus motor 50 and the lens support 60 can be fixed first, and then the lens support 60 can be fixed to the photosensitive component 30, simplifying the assembly process. That is, the first group of lenses 15 is fixed to the photosensitive component 30 via the lens support 60, the back focus motor 50 is fixed to the lens support 60, and the second group of lenses 16 is fixed to the photosensitive component 30 via the back focus motor 50 and the lens support 60.

[0140] Reference Figure 4C , Figure 7C and Figure 10CAs shown, the camera module also includes a lens support 60, which is disposed between the optical lens 10 and the photosensitive assembly 30. The first group of lenses 15 is fixed to the back focus motor 50 via the lens support 60. For example, the first group of lenses 15 is fixed to the lens support 60 by a connecting medium (adhesive such as glue), and the lens support 60 is fixed to the back focus motor fixing part 51 of the back focus motor 50 by a connecting medium 80 (adhesive such as glue). Thus, the first group of lenses 15 is fixed to the back focus motor 50 via the lens support 60. The back focus motor 50 is directly or indirectly fixed to the photosensitive assembly 30. For example, the back focus motor fixing part 51 of the back focus motor 50 is fixed to the filter element bracket 34 of the photosensitive assembly 30 by a connecting medium 80 (adhesive such as glue), thus the lens support 60 is fixed to the photosensitive assembly 30 via the back focus motor 50. In other words, the back focus motor 50 is fixed to the lens support 60 and the photosensitive assembly 30, the first group of lenses 15 is fixed to the photosensitive assembly 30 through the lens support 60 and the back focus motor 50, and the second group of lenses 16 is fixed to the photosensitive assembly 30 through the back focus motor 50.

[0141] exist Figures 4A to 4C , Figures 7A to 7C , Figures 10A to 10C In the illustrated embodiment, the filter element bracket 34 is integrally molded onto the circuit board 31 by a molding process. In this way, the filter element bracket 34 can provide a flat top surface for supporting the back focus motor 50 or the lens support part 60. Providing a flat mounting surface helps to reduce the assembly tolerance of the camera module.

[0142] exist Figures 4A to 4C , Figures 7A to 7C , Figures 10A to 10C In the illustrated embodiment, the lens support 60 may be integrally formed with the first lower lens barrel 1123 via injection molding. In other words, the lens support 60 can be considered as part of the first lower lens barrel 1123. Alternatively, the lens support 60 may be an independent component, fixed to the first group of lenses 15 via a connecting medium (adhesive or other bonding medium). This application is not limited to this. In one embodiment of this application, the lens support 60 may also be implemented as a lens drive motor 20, which drives the first group of lenses 15 to move.

[0143] In one embodiment of this application, the top surface of the back focus motor 50 is higher than the bottom surface of the first lower lens barrel 1123 of the first lens group 15. In this way, the back focus motor 50 can be arranged in the space located on the side of the first lens barrel 11, thereby reducing the lateral size of the back focus motor 50.

[0144] In one embodiment of this application, the first lower lens barrel 1123 of the first group of lenses 15 extends downward into the back focus motor 50. In this way, when the thickness of the compensation lens in the optical axis direction is thin, the periphery of the first lower lens barrel 1123 can provide space for the back focus motor 50, thereby minimizing the size of the camera module.

[0145] In one embodiment of this application, the maximum outer diameter of the back focus motor drive assembly 53 is smaller than the maximum outer diameter of the first lens 1210, and the arrangement of the back focus motor drive assembly 53 does not increase the size of the camera module. In other words, by driving the compensation lens to move instead of driving the first lens 1210 to move, the back focus motor drive assembly 53 can maintain a small size.

[0146] In one embodiment of this application, the maximum outer diameter of the back focus motor 50 is smaller than the maximum outer diameter of the first lens 1210, and the arrangement of the back focus motor drive assembly 53 does not increase the size of the camera module. In other words, by driving the compensation lens to move instead of driving the first lens 1210 to move, the back focus motor drive assembly 53 can maintain a small size.

[0147] In one embodiment of this application, the back focus motor 50 drives the second lens group 16 to move linearly along the optical axis of the second lens group 122, thereby adjusting the back focus distance of the optical lens 10 and achieving the effects of field curvature and back focus compensation, so that the camera module can maintain clear imaging when shooting subjects at different distances. Since this solution may result in large variations in the back focus of the optical lens 10, making it difficult to guarantee the imaging quality of batches, the compensation lens solution can actively adjust the back focus and field curvature range of the optical lens 10, which is beneficial for optimizing the display effect of telephoto lenses.

[0148] In another embodiment of this application, the back focus motor 50 drives the second group to translate along a first axis direction perpendicular to the optical axis of the second lens 1220 and / or drives the second group to rotate around a second axis direction perpendicular to the optical axis of the second lens 1220, in order to compensate for shake during shooting and realize the optical image stabilization function of the camera module. The first axis and the second axis are located on a plane perpendicular to the optical axis of the second lens 1220, and the first axis and the second axis may overlap or not overlap. This solution, by driving the compensation lens to move, can replace driving the optical lens 10 to move or driving the photosensitive chip 32 to move, achieving optical image stabilization function at a lower cost.

[0149] Specifically, considering that the first lens 1210 in this embodiment has a relatively large width and weight, if the optical focusing and / or optical image stabilization functions of the camera module are achieved by driving the first lens 1210 to move, on the one hand, a large driving force is required, which places higher demands on the drive motor; on the other hand, setting the drive motor on the periphery of the first lens 1210 will further increase the lateral size of the camera module; furthermore, the space available on the periphery of the first lens 1210 is small and insufficient to accommodate the drive motor. In this embodiment, a chip drive motor 40 is provided to drive the photosensitive component 30 to move, thereby achieving the optical focusing and / or optical image stabilization functions of the camera module.

[0150] Figure 3B , Figure 6B and Figure 9B This is a schematic diagram of the structure of a camera module that carries a chip-driven motor, such as... Figure 3B , Figure 6B and Figure 9B As shown, the chip drive motor 40 is adapted to drive the photosensitive component 30 to translate and / or rotate, thereby realizing the chip focusing and / or chip image stabilization functions of the camera module. The chip drive motor 40 includes a chip fixing part 41, a chip movable part 4242, a chip drive assembly 43, and a chip circuit assembly (not shown). The chip drive assembly 43 is disposed between the chip movable part 4242 and the chip fixing part 41, respectively connecting the chip movable part 4242 and the chip fixing part 41. The chip circuit assembly is electrically connected to the chip drive assembly 43 and the photosensitive component 30, and provides power to the chip drive assembly 43 to drive the chip movable part 4242 to translate in the X-axis direction (i.e., the direction set by the X-axis) and the Y-axis direction (i.e., the direction set by the Y-axis) and / or rotate around the Z-axis direction (i.e., the direction set by the Z-axis), thereby realizing translational image stabilization and / or rotational image stabilization of the photosensitive component 30.

[0151] In one embodiment of this application, the chip fixing part 41 includes a chip cover 411 and a chip base 412, wherein the chip cover 411 and the chip base 412 are fixed to each other and form a receiving cavity (that is, the receiving cavity of the chip fixing part 41) to accommodate the chip movable part 4242, the chip driving assembly 43, the chip circuit assembly, and the photosensitive assembly 30 and other camera module components. This not only protects the above-mentioned camera module components, but also reduces the entry of dust, dirt or stray light into the interior of the chip driving motor 40.

[0152] Specifically, in this embodiment, the chip cover 411 is disposed above the chip base 412, and the center of the chip cover 411 is provided with an opening, which corresponds to the photosensitive component 30, so that light can enter the photosensitive component 30 through the opening for imaging.

[0153] The movable part 4242 of the chip includes a movable chip carrier 421. A chip driving component 43 is provided between the movable chip carrier 421 and the chip cover 411, and the chip driving component 43 drives the movable chip carrier 421 to move relative to the chip fixing part 41. A photosensitive component 30 is provided between the movable chip carrier 421 and the chip base 412. The photosensitive component 30 is fixed to the movable chip carrier 421 through the circuit board 31, and thus the photosensitive component 30 moves with the movable chip carrier 421. In the embodiments of this application, there is a certain air gap between the bottom surface of the photosensitive component 30 (i.e., the side of the photosensitive component 30 near the substrate 212) and the substrate 212. In this way, the movement of the photosensitive component 30 is not easily hindered by the substrate 212, reducing the driving force requirement of the chip driving element. In other words, the photosensitive component 30 is suspended above the chip base 412.

[0154] The chip driving assembly 43 includes a chip image stabilization driving component (not shown) and a chip focusing driving component (not shown). The chip focusing driving component drives the photosensitive assembly 30 to move along the Z-axis to achieve chip focusing. The chip image stabilization driving component drives the photosensitive assembly 30 to move along the X-axis and Y-axis, and / or rotate around the Z-axis to achieve chip image stabilization of the photosensitive assembly 30. In a specific example of this application, the chip driving assembly 43 includes a chip coil group 433 and a chip magnet group 434. The chip coil group 433 and the chip magnet group 434 interact to generate a driving force to drive the chip movable carrier 421 to move relative to the chip fixed part 41. In one embodiment of this application, a magnetic conductive member 4341 is provided on the chip magnet group 434 to enhance the magnetic field strength of the chip magnet group 434 facing the chip coil group 433.

[0155] In one embodiment of this application, the chip drive motor 40 further includes a chip position sensing component and a chip holding component 44. The chip position sensing component is used to acquire the position or motion information of the photosensitive component 30, and the chip holding component 44 is adapted to suspend the chip movable carrier 421 in the chip fixed carrier. In this way, the photosensitive component 30 can be suspended in the chip fixed carrier by the chip holding component 44.

[0156] Specifically, a chip position sensing component (not shown) is fixed to the chip movable carrier 421, so that when the chip movable carrier 421 moves, the chip position sensing component is adapted to obtain the position information of the chip movable carrier 421 by acquiring the magnetic field change of the chip magnet assembly 434. In a specific example of this application, the chip position sensing component includes a first chip position sensing element, a second chip position sensing element, and a third chip position sensing element, thereby being used to sense the position information of the chip movable carrier 421 in three movements: translation along the X-axis direction, translation along the Y-axis direction, and rotation around the Z-axis direction.

[0157] Specifically, the chip holding assembly 44 includes a chip support assembly 441 and a chip magnetic attraction assembly (not shown). The chip magnetic attraction assembly is fixed to the chip movable carrier 421 of the chip movable part 4242. Thus, the magnetic attraction between the chip magnetic attraction assembly and the chip magnet assembly 434 causes the chip movable part 4242 to be attracted to the chip cover 411. The chip support assembly 441 is disposed between the chip cover 411 of the chip fixing part 41 and the chip movable carrier 421 of the chip movable part 4242. Under the action of the magnetic attraction between the chip magnetic attraction assembly and the chip magnet assembly 434, the chip support assembly 441 is clamped by the chip cover 411 and the chip movable carrier 421. A gap is maintained between the chip movable carrier 421 and the upper cover, thereby reducing the resistance of the chip movable part 4242 during movement.

[0158] Furthermore, the chip support assembly 441 includes at least three balls 4411 disposed between the movable chip carrier 421 and the top cover. To limit the movement range of the balls 4411, the chip support assembly 441 also includes at least three chip ball grooves 4412 corresponding to the at least three balls 4411. In a specific example of this application, the chip support assembly 441 also includes at least three ball support plates (not shown). The ball support plates are fixed to the movable chip carrier 421 and serve as the bottom surface of the chip ball grooves 4412. The ball support plates can be made of metal materials such as stainless steel, thereby providing a smoother support surface for the balls 4411 and reducing the friction of the rolling balls 4411.

[0159] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An optical lens assembly, characterized in that, include: An optical lens, comprising a lens group and a lens barrel, wherein the lens group is housed in the lens barrel; The lens group includes: a first lens group, the first lens group including a first lens, the first lens having an incident light-side surface and an exit light-side surface, the incident light-side surface including an incident light area and a first reflection area, the exit light-side surface including an exit light area and a second reflection area; wherein, the first reflection area and the second reflection area are used to reflect light rays incident from the incident light area into the first lens; A second lens group is formed, through which light exits from the light-emitting area. The second lens group comprises multiple second lenses, wherein at least one second lens near the image side acts as a compensating lens and moves relative to the other second lenses. A rear focal motor drives the compensation lens to move. The lens barrel includes an upper lens barrel portion and a lower lens barrel portion, with an adjustable gap between the upper lens barrel portion and the lower lens barrel portion. The adjustable gap is used to actively calibrate the first lens relative to the second lens group in the direction along the optical axis and in the direction inclined to the optical axis. The upper lens barrel portion includes an upper lens barrel clamping portion, and an upper lens barrel clamping surface is formed on the outer side of the upper lens barrel clamping portion. The diameter of the upper lens barrel clamping surface is smaller than the outer diameter of the first lens. The lower lens barrel includes a first lower lens barrel and a second lower lens barrel, wherein the compensating lens is fixed to the second lower lens barrel to form a second group of lenses; the other second lens is fixed to the first lower lens barrel, the first lens is fixed to the upper lens barrel, the upper lens barrel and the first lower lens barrel are fixed to form a first group of lenses, and the first lower lens barrel extends downward into the back focus motor.

2. The optical lens assembly according to claim 1, wherein the back focus motor includes a back focus motor fixed part, a back focus motor movable part, and a back focus motor drive assembly disposed between the back focus motor fixed part and the back focus motor movable part, wherein the back focus motor drive assembly connects the back focus motor fixed part and the back focus motor movable part and drives the back focus motor movable part to move relative to the back focus motor fixed part.

3. The optical lens assembly according to claim 2, wherein the second group of lenses is disposed on the movable part of the back focal motor, and the second group of lenses is driven by the back focal motor drive assembly to move relative to the first group of lenses to adjust the back focal distance of the optical lens.

4. The optical lens assembly according to claim 3, wherein the maximum outer diameter of the back focus motor is smaller than the maximum outer diameter of the first lens.

5. A camera module, characterized in that, include: Photosensitive components; The optical lens assembly as described in any one of claims 1 to 4, wherein the optical lens assembly is disposed on the light-sensing path of the photosensitive component; and A lens support is provided between the optical lens assembly and the photosensitive assembly.

6. The camera module according to claim 5, wherein the first group of lenses is fixed to the photosensitive component via the lens support, the back focus motor is fixed to the photosensitive component, and the second group of lenses is fixed to the photosensitive component via the back focus motor.

7. The camera module according to claim 6, wherein the first group of lenses is fixed to the photosensitive component via the lens support, the back focus motor is fixed to the lens support, and the second group of lenses is fixed to the photosensitive component via the back focus motor and the lens support.

8. The camera module according to claim 5, wherein the back focus motor is fixed to the lens support and the photosensitive component, the first group of lenses is fixed to the photosensitive component through the lens support and the back focus motor, and the second group of lenses is fixed to the photosensitive component through the back focus motor.

Images