CN116224538A

CN116224538A - Camera module

Info

Publication number: CN116224538A
Application number: CN202111544325.2A
Authority: CN
Inventors: 陈振宇; 孔艳霞; 杨祎; 许志强
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-16
Publication date: 2023-06-06
Also published as: CN116224537A; CN116224536A

Abstract

An imaging module is disclosed wherein an optical lens of the imaging module has a specific optical system design such that after an imaging light ray enters the optical lens, the imaging light ray is adapted to exit the optical lens after at least two reflections within the optical lens. Accordingly, the optical lens has a relatively large lateral dimension and a relatively heavy weight, and therefore, the image pickup module adopts a manner of driving the photosensitive assembly to adjust the optical performance of the image pickup module.

Description

Camera module

Technical Field

The application relates to the field of camera modules, in particular to a camera module with a special optical lens.

Background

With the popularity of mobile electronic devices, related technologies applied to camera modules of mobile electronic devices for helping users acquire images (e.g., videos or images) have been rapidly developed and advanced. The optical lens is an indispensable component in the camera module and directly influences the imaging quality of the camera module. Accordingly, as the requirements for the imaging quality and the photographing function of the photographing module become higher, the optical lens becomes more precise and diversified. From the effective focal length, the optical lens can be divided into a short focal length lens, a medium focal length lens and a long focal length lens, and as the effective focal length of the optical lens increases, the longitudinal height dimension of the optical lens also gradually increases, which is contrary to the trend of thinning the mobile electronic device.

In order to solve the technical contradiction between long focal length and thinning, a periscope type camera or a lens foldback type camera is adopted in a common scheme on the market. Periscope type cameras are long-focal-length telescope lenses, the propagation direction of a light path is changed by using a reflecting mirror, the size of a lens in the length direction is sacrificed to change the size reduction of the lens in the height direction, so that the purpose of thinning a camera shooting module is achieved, but the periscope type cameras can limit the size of a photosensitive chip and the size of a lens aperture, and the imaging effect is not facilitated. A lens reflex camera is a special form of a long-focal-length lens, which has a relatively large outer diameter so that the overall characteristics of the reflex lens are short in the longitudinal direction and long in the transverse direction, and this structure and size arrangement are such that the reflex lens occupies a large accommodation space when being arranged in an electronic device. Also, the fold-back camera includes a plurality of optical elements (including a reflecting mirror and a projecting mirror), which results in the fold-back camera having a relatively large weight, which is disadvantageous in the design of the driver.

Therefore, an optimized design of the tele camera module is desired.

Disclosure of Invention

An advantage of the present invention is to provide an image capturing module, wherein the optical lens has a special optical design, so that a ratio between an optical total length of the optical lens and an effective focal length thereof is 0.01-0.5, so that the image capturing module configured with the optical lens can achieve a long-focus capturing effect, and can achieve a large caliber and a large image plane.

Another advantage of the present application is to provide a camera module, wherein the camera module adopts a manner of driving the photosensitive assembly to adjust the optical performance of the camera module, considering that the optical lens has a relatively large lateral dimension and a relatively heavy weight, in this manner, design difficulty of a driving scheme of the camera module is simplified.

To achieve at least one of the above advantages, the present application provides a camera module, which includes:

a photosensitive assembly;

an optical lens held in a photosensitive path of the photosensitive assembly, wherein the optical lens has a specific optical system design such that, upon entry of an imaging light ray into the optical lens, the imaging light ray is adapted to exit the optical lens after at least two reflections within the optical lens; the method comprises the steps of,

the driving assembly is used for driving the photosensitive assembly to move, and comprises a driving shell and a first driving element positioned in the driving shell, wherein the setting position of the first driving element in the driving shell is positioned on the inner side of the outermost edge of the optical lens.

In the camera module according to the present application, the optical lens is mounted on a drive housing of the drive assembly.

In the camera module according to the application, the first driving element is suitable for driving the photosensitive assembly to move in a plane set by the photosensitive assembly for optical anti-shake, and the driving assembly further comprises a second driving element positioned in the driving shell, and the second driving element is suitable for driving the photosensitive assembly to move along the photosensitive path for optical focusing.

In the image pickup module according to the present application, the first driving element is disposed in the driving housing along a horizontal direction set by the driving housing, and the second driving element is disposed in the driving housing along a height direction set by the driving housing.

In the camera module according to the application, the second driving element is located inside the first driving element.

In the camera module according to the application, the second driving element is arranged in the driving housing at a position higher than the first driving element.

In the camera module according to the present application, the first driving element is a voice coil motor, and the second driving element is a piezoelectric actuator.

In the camera module according to the application, the driving housing comprises an upper cover and a base which are mutually buckled, and the upper cover and the base which are mutually buckled form a containing cavity for containing the first driving element and the second driving element therein.

In the camera module according to the present application, the driving housing further includes an anti-shake carrier and a focusing carrier, the focusing carrier is suspended on the anti-shake carrier, wherein the photosensitive assembly is disposed on the focusing carrier, and the second driving element is fixed on the anti-shake carrier and is adapted to drive the focusing carrier to move along the photosensitive path so as to drive the photosensitive assembly to move along the photosensitive path; the first driving element is arranged between the anti-shake carrier and the substrate and is suitable for driving the anti-shake carrier to move in a plane set by the photosensitive assembly so as to drive the second driving element, the focusing carrier and the photosensitive assembly to move in the plane set by the photosensitive assembly.

In the camera module according to the present application, the second driving element is fixed to one corner of the anti-shake carrier.

In the camera module according to the application, the anti-shake carrier is provided with a containing cavity concavely formed therein, and the focusing carrier is contained in the containing groove in a suspending manner.

In the camera module according to the present application, the anti-shake carrier further has a limit protrusion formed protruding from an inner bottom surface of the accommodating groove, and the limit protrusion is located below the focusing carrier.

In the camera module according to the present application, the driving assembly further includes at least three support assemblies disposed between the base and the anti-shake carrier in a non-collinear manner.

In the camera module according to the present application, the at least three support members include four support members at four corners between the base and the anti-shake carrier.

In the camera module, the ratio between the total optical length of the optical lens and the effective focal length thereof is 0.01-0.5, the height of the optical lens is less than or equal to 7.5mm, the angle of view of the optical lens is 1-30 degrees, the f-number of the optical lens is 0.5-10, and the ratio between the effective focal length of the optical lens and the diameter of the image surface thereof is 4.8-9.6.

Further objects and advantages of the present application will become fully apparent from the following description and the accompanying drawings.

These and other objects, features, and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings, and the appended claims.

Drawings

The foregoing and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1 illustrates a schematic diagram of an optical lens according to an embodiment of the present application.

Fig. 2 illustrates a top view of the optical lens according to an embodiment of the present application.

Fig. 3 illustrates a schematic diagram of a variant implementation of the optical lens according to an embodiment of the present application.

Fig. 4 illustrates a schematic view of an optical lens according to another embodiment of the present application.

Fig. 5 illustrates a schematic diagram of a variant implementation of the optical lens according to another embodiment of the present application.

Fig. 6 illustrates a schematic diagram of another variant implementation of the optical lens according to another embodiment of the present application.

Fig. 7 illustrates a schematic perspective view of another variant implementation of the optical lens according to another embodiment of the present application.

Fig. 8 illustrates a schematic diagram of an imaging module according to an embodiment of the present application.

Fig. 9 illustrates a schematic diagram of a variant implementation of the camera module according to an embodiment of the present application.

Fig. 10 illustrates a schematic diagram of another variant implementation of the camera module according to an embodiment of the present application.

Fig. 11 illustrates a schematic diagram of a further variant implementation of the camera module according to an embodiment of the present application.

Fig. 12 illustrates a schematic diagram of a further variant implementation of the camera module according to an embodiment of the present application.

Fig. 13 illustrates a schematic diagram of an imaging module according to another embodiment of the present application.

Fig. 14 illustrates a schematic cross-sectional view of a drive assembly of the camera module according to another embodiment of the present application.

Fig. 15 illustrates a top view of the drive assembly according to another embodiment of the present application.

Fig. 16 illustrates a perspective cross-sectional view of the drive assembly according to another embodiment of the present application.

Fig. 17 illustrates another perspective cross-sectional view of the drive assembly according to another embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application and not all of the embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, as the requirements for the imaging quality and photographing function of the image pickup module become higher, the optical lens becomes more precise and diversified. From the effective focal length, the optical lens can be divided into a short focal length lens, a medium focal length lens and a long focal length lens, and as the effective focal length of the optical lens increases, the longitudinal height dimension of the optical lens also gradually increases, which is contrary to the trend of thinning the mobile electronic device. Here, the short focal length, the middle focal length, and the long focal length are three relative concepts, where the short focal length indicates that the effective focal length of the optical lens is within a first preset range, the middle focal length indicates that the effective focal length of the optical lens is within a second preset range, the long focal length indicates that the effective focal length of the optical lens is within a third preset range, and specific values of the first preset range, the second preset range, and the third preset range may be adjusted according to technological development and iteration.

In order to solve the technical contradiction between long focal length and thinning, a periscope type camera or a lens foldback type camera is adopted in a common scheme on the market. The periscope type camera is a long-focus telescope lens, and the traveling direction of a light path is changed by utilizing a reflecting mirror, and the dimension of a lens in the length direction is sacrificed to change the dimension of the lens in the height direction, so that the aim of thinning the camera module is fulfilled. It should be appreciated that the effective focal length of the periscope camera is dependent on its length dimension, and therefore, in order to increase the effective focal length of the periscope camera, the length of the periscope camera may inevitably be increased. In addition, because the height of the electronic equipment is limited, the periscope type camera can limit the size of the photosensitive chip and the size of the lens aperture, which is unfavorable for imaging effect. A lens reflex camera is a special form of a long-focal-length lens, which has a relatively large outer diameter so that the overall characteristics of the reflex lens are short in the longitudinal direction and long in the transverse direction, and this structure and size arrangement are such that the reflex lens occupies a large accommodation space when being arranged in an electronic device. Also, the fold-back camera includes a plurality of optical elements (including a reflecting mirror and a projecting mirror), which results in the fold-back camera having a relatively large weight, which is disadvantageous in the design of the driver.

Therefore, an optimized design of the tele camera module is desired.

Aiming at the technical contradiction, the technical conception of the inventor designs an integrated optical lens for absorbing the design thought and characteristics of the foldback camera, and a plurality of mutually alternating and opposite reflecting areas are arranged on one optical lens so as to enable the ratio between the total optical length of the optical lens and the effective focal length of the optical lens to be 0.01-0.5 through the special optical design, so that the shooting effect of long focus can be achieved by the shooting module provided with the optical lens, and simultaneously, large caliber and large image surface can be realized.

Based on this, the present application provides an optical lens, wherein the optical lens has opposing first and second optical faces; wherein the first optical surface and the second optical surface have a specific surface-type structure such that, after an imaging light enters the optical lens from the first optical surface, the imaging light is adapted to be emitted from the second optical surface after being reflected at least twice between the first optical surface and the second optical surface.

Having described the basic principles of the present application, various non-limiting embodiments of the present application will now be described in detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, an optical lens 100 according to an embodiment of the present application is illustrated, which has a special optical design such that a ratio between an optical total length of the optical lens 100 and an effective focal length thereof is 0.01-0.5, so that an image capturing module configured with the optical lens 100 can achieve a long-focus capturing effect and simultaneously achieve a large aperture and a large image plane.

Accordingly, as shown in fig. 1 and 2, the optical lens 100 has a first optical surface 110 and a second optical surface 120 which are opposite to each other in the up-down direction, and a transmission member 130 extending between the first optical surface 110 and the second optical surface 120. In particular, in the arrangement pattern of the optical lens 100 illustrated in fig. 1, the first optical surface 110 is disposed on the object side, and the second optical surface 120 is disposed on the image side, that is, the imaging light from the outside enters the optical lens 100 from the first optical surface 110 and exits from the second optical surface 120.

In this embodiment, the first optical surface 110 has at least one refractive region and at least one reflective region from its edge region to its central region, and the second optical surface 120 has at least one reflective region and at least one refractive region from its edge region to its central region, where the first refractive region 111 of the first optical surface 110 is configured to allow external imaging light to enter the optical lens 100 from the refractive region of the first optical surface 110; at least one reflection area of the second optical surface 120 and at least one reflection area of the first optical surface 110 are respectively disposed opposite to each other, for allowing the imaging light entering the optical lens 100 to alternately reflect and propagate between the at least one reflection area of the second optical surface 120 and the at least one reflection area of the first optical surface 110 to the second refraction area 123 of the second optical surface 120; the second refractive region 123 of the second optical surface 120 is configured to allow the imaging light entering the optical lens 100 to exit the optical lens 100 from the second refractive region 123 of the second optical surface 120, and by such a special optical design, the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.01 to 0.5.

In the example shown in fig. 1, the first refractive region 111 of the first optical surface 110 is located at an edge region of the first optical surface 110, and the second refractive region 123 of the second optical surface 120 is located at a middle region of the second optical surface 120, that is, in this example, imaging light from the outside enters the optical lens 100 from an edge region of the upper surface of the optical lens 100 and exits the optical lens 100 from a middle region of the lower surface of the optical lens 100. Accordingly, the first refraction area 111 of the first optical surface 110 forms an incident aperture of the optical lens 100, and the first refraction area 111 of the first optical surface 110 forms an angle of view of the optical lens 100. Quantitatively, in particular, in this example, the first refractive region 111 of the first optical surface 110 has an inner diameter of 12.8 to 17.9mm and an outer diameter of 10mm to 100mm (i.e., the aperture of the optical lens 100 is 10mm to 100 mm), and the angle of view of the optical lens 100 is 1 ° to 30 °.

Further, in the example illustrated in fig. 1, the optical design of the optical lens 100 is illustrated by taking the example in which the first optical surface 110 includes two reflection regions having the optical axis of the optical lens 100 as a central axis and the second optical surface 120 includes two reflection regions having the optical axis as a central axis, here, in order to illustrate that the two reflection regions defining the first optical surface 110 are the second reflection region 112 and the fourth reflection region 113, and the two reflection regions locating the second optical surface 120 are the first reflection region 121 and the third reflection region 122. That is, in the example illustrated in fig. 1, the at least one reflection region of the first optical surface 110 includes a second reflection region 112 and a fourth reflection region 113 from an edge region of the first optical surface 110 toward a middle region of the first optical surface 110, the at least one reflection region of the second optical surface 120 includes a first reflection region 121 and a third reflection region 122 from an edge region of the second optical surface 120 toward a middle region of the second optical surface 120, wherein the first reflection region 121 faces the first refraction region 111 of the first optical surface 110, the second reflection region 112 faces the first reflection region 121, the third reflection region 122 faces the second reflection region 112, the fourth reflection region 113 faces the third reflection region 122, and the second refraction region 123 of the second optical surface 120 faces the fourth reflection region 113.

Accordingly, during imaging, imaging light from the outside enters the optical lens 100 from the refractive zone located at the edge region of the first optical surface 110 and propagates along the transmissive member 130 toward the first reflective zone 121 located at the edge region of the second optical surface 120, wherein the first reflective zone 121 reflects imaging light toward the second reflective zone 112 of the first optical surface 110, the second reflective zone 112 reflects imaging light from the first reflective zone 121 toward the third reflective zone 122, the third reflective zone 122 reflects imaging light from the second reflective zone 112 toward the fourth reflective zone 113, and the fourth reflective zone 113 reflects imaging light from the third reflective zone 122 toward the refractive zone located at the middle region of the second optical surface 120 and reflects imaging light from the second reflective zone 123 of the second optical surface 120 out of the optical lens 100.

That is, in the example shown in fig. 1, the refractive region located at the edge region of the first optical surface 110 is configured to receive incident light from the object side, the incident light passes through the first refractive region 111 of the first optical surface 110 to reach the first reflective region 121 of the second optical surface 120, the first reflective region 121 of the second optical surface 120 is configured to reflect light from the first refractive region 111 of the first optical surface 110, the second reflective region 112 of the first optical surface 110 is configured to reflect light from the first reflective region 121 of the second optical surface 120, the third reflective region 122 of the second optical surface 120 is configured to reflect light from the second reflective region 112 of the first optical surface 110, the fourth reflective region 113 of the first optical surface 110 is configured to reflect light from the third reflective region 122 of the second optical surface 120, and the second refractive region 123 of the second optical surface 120 is configured to reflect light from the fourth reflective region 113 of the first optical surface 110. That is, after passing through the first refraction region 111 of the first optical surface 110, the incident light is reflected by the first reflection region 121 of the second optical surface 120, the second reflection region 112 of the first optical surface 110, the third reflection region 122 of the second optical surface 120, and the fourth reflection region 113 of the first optical surface 110, and then is refracted by the second refraction region 123 of the second optical surface 120, and then is emitted, and finally is converged to an image plane for imaging.

More specifically, in the embodiment of the present application, it is preferable that the first refractive region 111 of the first optical surface 110 is a plane, that is, the radius of curvature of the first refractive region 111 of the first optical surface 110 is infinity. Since the first refraction region 111 of the first optical surface 110 is configured to be planar, processing is facilitated, and additional materials, such as a protective film layer or an antireflection film, etc., may be applied on the first refraction region 111 of the first optical surface 110 by coating, attaching, etc., for example, a protective film may be coated on the first refraction region 111 of the first optical surface 110 to protect the first refraction region 111 of the first optical surface 110 and prevent the first refraction region 111 of the first optical surface 110 from being scratched during subsequent processing, thereby causing damage. Of course, an infrared filter film may be coated on the first refraction area 111 of the first optical surface 110, or an IR lens may be attached to the upper surface of the first refraction area 111 of the first optical surface 110 for filtering light. That is, in some examples of the present application, the optical lens 100 further includes a film structure disposed at the first refraction region 111 of the first optical surface 110, where the film structure may be a filter film or a protective film, which is not limited herein.

From a quantitative point of view, in particular, in this example, the first refractive region 111 of the first optical surface 110 has an inner diameter of 5mm to 20mm (for example, the first refractive region 111 of the first optical surface 110 has an inner diameter of 12.8 to 17.9 mm) and an outer diameter of 10mm to 100mm (that is, the aperture of the optical lens 100 is 10mm to 100 mm), and the angle of view of the optical lens 100 is 1 ° to 30 °. Preferably, the first refractive region 111 of the first optical surface 110 has an inner diameter of 12.8-17.9mm and an outer diameter of 20-38 mm, and the optical lens 100 has a field angle of 2.6 ° 12 °.

The first reflective area 121 of the second optical surface 120 is configured as an aspheric surface, and the first reflective area 121 of the second optical surface 120 is concave toward the object side for converging light. In some examples of the present application, a reflective film may be further disposed on the first reflective area 121 of the second optical surface 120, so as to enhance the intensity of the reflected light and reduce the light loss. The height of the first reflective area 121 of the second optical surface 120 on the side far from the optical axis is higher than the height of the first reflective area 121 of the second optical surface 120 on the side near the optical axis. Preferably, in the embodiment of the present application, the height of the first reflective area 121 of the second optical surface 120 gradually decreases from the edge area of the optical lens 100 to the central area thereof, that is, the end point of the first reflective area 121 away from the optical axis is the highest point of the first reflective area 121, and the end point of the first reflective area 121 near the optical axis is the lowest point of the first reflective area 121.

The second reflective area 112 of the first optical surface 110 is configured as an aspheric surface. Specifically, the second reflective area 112 of the first optical surface 110 protrudes toward the image side, so as to diffuse light. In some examples of the present application, a reflective film may be further disposed on the second reflective region 112 of the first optical surface 110, so as to enhance the intensity of the reflected light and reduce the light loss. In particular, in the embodiment of the present application, the height of the second reflection area 112 of the first optical surface 110 on the side far from the optical axis is higher than the height of the second reflection area 112 of the first optical surface 110 on the side close to the optical axis.

The third reflective area 122 of the second optical surface 120 is configured as an aspheric surface, and the third reflective area 122 of the second optical surface 120 is concave toward the object side for converging light. In some examples of the present application, a reflective film may be further disposed on the third reflective region 122 of the second optical surface 120, so as to enhance the intensity of the reflected light and reduce the light loss. The height of the third reflective area 122 of the second optical surface 120, which is far from the optical axis, is higher than the height of the third reflective area 122 of the second optical surface 120, which is near to the optical axis. Preferably, in the embodiment of the present application, the height of the outermost side of the third reflective area 122 of the second optical surface 120 is flush with the height of the innermost side of the first reflective area 121 of the second optical surface 120, so as to prevent the two mirror edges from being bumped and damaged due to the protrusions, and facilitate manufacturing.

The fourth reflective area 113 of the first optical surface 110 is configured as an aspheric surface, and the fourth reflective area 113 of the first optical surface 110 is convex toward the image side for diffusing light. Of course, a reflective film may be disposed on the fourth reflective area 113 of the first optical surface 110, so as to enhance the intensity of the reflected light and reduce the light loss. In particular, in the present embodiment, the fourth reflective region 113 of the first optical surface 110 forms a top central region of the optical lens 100. As shown in fig. 1, in the embodiment of the present application, at least a portion of the central area of the fourth reflective area 113 is devoid of light, and for convenience of installation and positioning, the portion of the fourth reflective area 113 devoid of light may be processed to form a top central area having a concave taper shape. Accordingly, the concave-cone-shaped top surface forms a concave-cone-shaped space that facilitates positioning of the optical lens 100 during installation.

The second refractive area 123 of the second optical surface 120 is located in the middle area of the second optical surface 120, and is configured as an aspheric surface, the second refractive area 123 of the second optical surface 120 protrudes toward the object side, at this time, the second refractive area 123 of the second optical surface 120 is used for diffusing light, and the light passes through the second refractive area 123 of the second optical surface 120 to form a focus on the image plane, and the second refractive area 123 of the second optical surface 120 can enlarge the image plane area of the optical lens, thereby facilitating implementation of a large image plane module. The second refractive region 123 of the second optical surface 120 has a height away from the optical axis, which is lower than a height of the second refractive region 123 of the second optical surface 120 near the optical axis.

In particular, in this example, the third reflection region 122 of the second optical surface 120 and the refraction region 123 of the second optical surface 120 smoothly transition, and the innermost height of the third reflection region 122 of the second optical surface 120 is flush with the outermost height of the second refraction region 123 of the second optical surface 120, so that the occurrence of a bump at the edges of both mirrors to cause a gouged damage is prevented, and the manufacturing is facilitated.

It should be understood that in other embodiments of the present application, a height difference may also be formed between the third reflective region 122 of the second optical surface 120 and the refractive region 123 of the second optical surface 120, where the height difference between the third reflective region 122 of the second optical surface 120 and the second refractive region 123 of the second optical surface 120 results in a side surface with a larger slope between the third reflective region 122 of the second optical surface 120 and the second refractive region 123 of the second optical surface 120, where the side surface may be used to block stray light. Meanwhile, the height difference between the third reflective area 122 of the second optical surface 120 and the second refractive area 123 of the second optical surface 120 may increase the distance between the second refractive area 123 of the second optical surface 120 and the photosensitive assembly, so that the back focal space may be reasonably utilized, and the camera module may be more compact. In particular, when the second refractive region 123 of the second optical surface 120 is configured as an aspheric surface protruding toward the object side, it can refract the light reflected by the fourth reflective region 113 of the first optical surface 110, the image plane height to which the non-refracted light is converged is lower than the image plane height to which the refracted light is converged, and the second refractive region 123 of the second optical surface 120 is configured as an aspheric surface protruding toward the object side, so that the height of the camera module can be reduced under the condition that the optical path is unchanged and the imaging is clear, which is beneficial to miniaturization of the camera module. The ratio between the width of the fourth reflective region 113 of the first optical surface 110, the width of the second refractive region 123 of the second optical surface 120, and the width of the imaging surface 140 of the optical lens 100 is 0.5-2 (e.g., the width of the fourth reflective region 113 of the first optical surface 110, the width of the second refractive region 123 of the second optical surface 120, and the width of the imaging surface 140 of the optical lens 100 are equal), and at this time, the light reflected by the fourth reflective region 113 of the first optical surface 110 can reach the second refractive region 123 of the second optical surface 120 without turning at a large angle, which is convenient for designing and manufacturing the second refractive region 123 of the second optical surface 120.

The difference in height between the second refractive area 123 of the second optical surface 120 and the imaging surface 140 of the optical lens 100 is 0.4-1.6mm, that is, in the embodiment of the present application, the back focal value of the optical lens 100 is 0.1-4mm. It should be noted that in the embodiment of the present application, the height difference between the second refractive area 123 of the second optical surface 120 and the imaging surface 140 of the optical lens 100 is smaller, so that the TTL of the image capturing module is reduced, so that the image capturing module realizes the tele function, and meanwhile, the height dimension is reduced, which is beneficial to miniaturization of the tele image capturing module. In particular, TTL (total track length) in the present embodiment represents the total height dimension taken up by imaging light after entering the optical lens and after being folded a plurality of times in the height direction.

It is noted that, in the embodiment of the present application, the ratio between the surface width of the optical lens 100 and the number of reflections is 0.5 to 5, and the like, and the surface width of the optical lens 100 represents the lateral dimension of the cross section of the optical lens 100 in the direction perpendicular to the optical axis.

Further, in the example illustrated in fig. 1, the second reflecting area 112 and the fourth reflecting area 113 have a second gap 1100 on the first optical surface 110, that is, in the example described above, a gap exists between at least two reflecting areas disposed on the second optical surface 120, and a gap exists between at least two reflecting areas disposed on the first optical surface 110, so that the light reflected by the third reflecting area 122 of the second optical surface 120 and the light refracted by the second refracting area 123 of the second optical surface 120 have no focus, preventing the light from interfering, affecting imaging, and being beneficial to improving the imaging quality of the camera module. In some other examples of the present application, a notch 1000 may also be disposed at the first gap 1100, and a light shield may be disposed at the notch 1000, where the light shield may be a straight barrel light shield for preventing stray light. The light shield may also be configured as a cellular light shield, where the maximum incident angle of the light passing through the light hole of the cellular light shield and the maximum incident angle of the light passing through the straight barrel light shield should be approximately equal, and the light shield may also be used for preventing stray light, as shown in fig. 3, which is not limited in this application. Of course, a light shielding member may be provided at the first gap 1100 for preventing stray light, and the light shielding member may be a step, a mirror surface coated with a light shielding material, or the like.

It should be appreciated that the first reflective area 121 of the second optical surface 120 and the third reflective area 122 of the second optical surface 120 may be disposed with a relatively small distance between two adjacent reflective areas, which is more convenient for manufacturing. Further, in some examples of the present application, the curvature of the local area of the first reflective region 121 of the second optical surface 120 adjacent to the third reflective region 122 of the second optical surface 120 is similar, so the first reflective region 121 of the second optical surface 120 and the third reflective region 122 of the second optical surface 120 may be configured as a continuous curved surface, that is, the first reflective region 121 of the second optical surface 120 and the third reflective region 122 of the second optical surface 120 partially overlap, that is, the first reflective region 121 of the second optical surface 120 and the third reflective region 122 of the second optical surface 120 may share a partial reflective region, which is convenient for processing, and may reduce the size and the cost. That is, in some embodiments of the present application, the first reflective region 121 is adjacent to the third reflective region 122 and/or the second reflective region 112 is adjacent to the fourth reflective region 113, and the first reflective region 121 and the second reflective region 112 have similar curvatures, and the second reflective region 112 and the fourth reflective region 113 have similar curvatures.

Since the first reflective area 121 of the second optical surface 120, the second reflective area 112 of the first optical surface 110, the third reflective area 122 of the second optical surface 120, and the fourth reflective area 113 of the first optical surface 110 are all at a height higher on the side away from the optical axis than on the side closer to the optical axis, the light reflected by the first reflective area 121 of the second optical surface 120, the second reflective area 112 of the first optical surface 110, the third reflective area 122 of the second optical surface 120, and the fourth reflective area 113 of the first optical surface 110 always converges toward the center. That is, in the present embodiment, the reflection regions of the first optical surface 110 and the reflection regions of the second optical surface 120 are alternately disposed from the edge region of the optical lens 100 like the middle region of the optical lens 100.

It should be noted that the first reflective area 121 of the second optical surface 120, the second reflective area 112 of the first optical surface 110, the third reflective area 122 of the second optical surface 120, and the fourth reflective area 113 of the first optical surface 110 are all formed by one-step processing, wherein the height of the side far from the optical axis is higher than the height of the side close to the optical axis, so that the first optical surface 120 and/or the first optical surface 110 can be formed by one-step processing.

It should be understood that the optical design of the optical lens 100 as illustrated in fig. 2 and 3 absorbs the design thought and characteristics of a fold-back camera, and a plurality of reflective regions which are alternately opposite to each other are arranged on a piece of optical lens 100 so that the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.1-0.4 through the special optical design, so that the camera module provided with the optical lens 100 can achieve both long-focus shooting effect and large caliber and large image surface.

It should be noted that in the embodiment of the present application, the optical lens 100 has an integral structure, that is, the optical lens 100 is configured as one piece, and compared with a folded lens or periscope lens having a plurality of lenses in the prior art, the impact of a single piece optical lens in a collision environment is less, the impact resistance and the high temperature resistance are better, the stability is better, the height of the optical lens can be reduced, and the height of the optical lens can be made to be less than 7.5mm.

And, when the integrated optical lens 100 and the lens barrel form a single lens type lens, the single lens type lens does not need to increase assembling and debugging processes between lenses, improving assembling efficiency, reducing assembling errors, and saving cost, compared with the multi-lens type lens in the prior art. The first optical surface 110 includes, from inside to outside, a fourth reflection area 113 of the first optical surface 110, a second reflection area 112 of the first optical surface 110, and a first refraction area 111 of the first optical surface 110, with the optical axis as a center, preferably, the highest point of each mirror surface on the first mirror surface is disposed on the same plane, so as to reduce interference, collision and damage, and improve the yield. The second optical surface 120 is a second refractive region 123 of the second optical surface 120, a third reflective region 122 of the second optical surface 120, and a first reflective region 121 of the second optical surface 120, that is, the first refractive region 111 of the first optical surface 110 is disposed outside the second reflective region 112 of the first optical surface 110, the second reflective region 112 of the first optical surface 110 is disposed outside the fourth reflective region 113 of the first optical surface 110, the first reflective region 121 of the second optical surface 120 is disposed outside the third reflective region 122 of the second optical surface 120, and the third reflective region 122 of the second optical surface 120 is disposed outside the second refractive region 123 of the second optical surface 120, respectively, from inside to outside about the optical axis.

Also, in the example illustrated in fig. 2 and 3, the optical lens 100 includes four reflection regions, that is, the imaging light entering the optical lens 100 passes out of the optical lens 100 after four reflections. In a specific example, when the optical lens 100 includes four reflection areas, the imaging surface 140 of the optical lens 100 has a diameter of 6.4mm, the optical lens has a thickness of 7.14mm, the aperture of the optical lens is 25.5mm, and the back focus of the optical lens is 0.8mm; the effective focal length of the optical lens is 30.6mm; and the FNO of the optical lens is 1.2. TTL/efl=0.26 at this time; the ratio of the diameter of the imaging surface 140 of the optical lens 100 to the total optical length of the camera module is: 0.8; the ratio of the effective focal length of the camera module to the diameter of the image surface of the optical lens is 4.8.

In another specific example of the present application, when the optical lens 100 includes four reflection areas, the diameter of the imaging surface 140 of the optical lens 100 is 6.4mm, the thickness of the optical lens is 6.61mm, the aperture of the optical lens is 24mm, and the back focal length of the optical lens is 1.4mm; the effective focal length of the optical lens is 61.2mm; and the FNO of the optical lens is 2.6. TTL/efl=0.13 at this time; the ratio of the diameter of the imaging surface 140 of the optical lens 100 to the total optical length of the camera module is: 0.8; the ratio of the effective focal length of the camera module to the diameter of the image surface of the optical lens is 9.6.

It should be understood that when the number of reflection areas of the optical lens 100 is set to 4, the number of reflection times of the imaging light in the optical lens 100 is 4, and in other embodiments, a greater number of reflection areas may be set, for example, 6, 8, etc., and the number of reflection times may also be increased, so that the effective focal length of the optical lens 100 may be increased, and increasing the number of reflection areas may also enable more surfaces to participate in image correction, thereby improving the imaging quality.

It should be noted that, when the number of reflection regions of the optical lens 100 increases, the cross-sectional area of the optical lens 100 in the direction perpendicular to the optical axis increases, and the diameter of the optical lens 100 increases due to the first refractive region 111 of the first optical surface 110 being located at the outermost side of the optical lens 100, resulting in an increase in the inner and outer diameters of the first refractive region 111 of the first optical surface 110. Accordingly, in the case where the width of the first refractive region 111 of the first optical surface 110 is fixed, the area of the first refractive region 111 of the first optical surface 110 increases, thereby increasing the light entrance amount area of the optical lens 100. Meanwhile, the optical lens 100 has an increased diameter and a reduced FNO value, so that the diffraction limit can be improved, the camera module is applicable to shorter wavelength and smaller pixel size, the whole camera module has better resolution capability, and the camera module is miniaturized.

Example 2

As shown in fig. 4, an optical lens 100 according to another embodiment of the present application is illustrated, wherein the optical lens 100 has a special optical design such that imaging light rays are emitted from a second optical surface 120 opposite to a first optical surface 110 thereof after being reflected at least twice after entering the optical lens 100 from the first optical surface 110 thereof. In accordance with the optical lens described in embodiment 1, the optical lens according to embodiment 2 of the present application has a special optical design such that the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.01 to 0.5, so that the image pickup module provided with the optical lens 100 can achieve both a long-focal photographing effect and a large aperture and a large image plane.

Accordingly, as shown in fig. 4, the optical lens 100 has a first optical surface 110 and a second optical surface 120 that are opposite to each other vertically, wherein the first optical surface 110 corresponds to an object side, the second optical surface 120 corresponds to an image side, that is, imaging light from the outside enters the optical lens 100 from the first optical surface 110 and exits from the second optical surface 120, the first optical surface 110 of the optical lens 100 forms an incident surface of the optical lens 100, the second optical surface of the optical lens 100 forms an incident surface of the optical lens 120, and an image surface of the optical lens 100 is formed on a side on which the second optical surface 120 is located.

In this embodiment, the first optical surface 110 has at least one refractive area and at least one reflective area from its edge area to its central area, and the second optical surface 120 has at least one reflective area and at least one refractive area from its edge area to its central area, so that the imaging light beam is emitted from the second optical surface 120 opposite to the first optical surface 110 after entering the optical lens 100 from the first optical surface 110 and being reflected at least twice.

Specifically, the refractive region of the first optical surface 110 is configured to allow the external imaging light to enter the optical lens 100 from the refractive region of the first optical surface 110; at least one reflection area of the second optical surface 120 and at least one reflection area of the first optical surface 110 are respectively disposed opposite to each other, for allowing the imaging light entering the optical lens 100 to alternately reflect and propagate between the at least one reflection area of the second optical surface 120 and the at least one reflection area of the first optical surface 110 to the second refraction area 123 of the second optical surface 120; the second refractive region 123 of the second optical surface 120 is configured to allow the imaging light entering the optical lens 100 to pass out of the optical lens 100 from the second refractive region 123 of the second optical surface 120, and by such a special optical design, the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.01 to 0.5.

In the example shown in fig. 4, the refractive region of the first optical surface 110 is defined as a first refractive region 111 and the refractive region of the second optical surface 120 is defined as a second refractive region 123, wherein the first refractive region 111 of the first optical surface 110 is located at an edge region of the first optical surface 110, and the second refractive region 123 of the second optical surface 120 is located at a middle region of the second optical surface 120, that is, in this example, imaging light from the outside enters the optical lens 100 from the edge region of the upper surface of the optical lens 100 and exits the optical lens 100 from the middle region of the lower surface of the optical lens 100. Accordingly, the first refraction area 111 of the first optical surface 110 forms an incident aperture of the optical lens 100, and the first refraction area 111 of the first optical surface 110 forms an angle of view of the optical lens 100.

Quantitatively, in this example, the inner diameter of the first refractive region 111 is 5mm to 20mm, the outer diameter of the first refractive region 111 is 10mm to 100mm, the ratio of the inner diameter to the outer diameter of the first refractive region 111 is 0.1 to 0.95, and the angle of view of the optical lens 100 is 1 ° to 30 °. Here, it should be understood that, in the example illustrated in fig. 4, the first refractive region 111 has a ring-shaped structure, an inner peripheral diameter of which is the inner diameter, and an outer peripheral diameter of which is the outer diameter. It should be understood that the ratio of the inner diameter and the outer diameter of the first refractive region 111 characterizes the opening ratio of the optical lens 100, that is, in the embodiment of the present application, the opening ratio of the optical lens 100 is 0.1 to 0.95.

Further, in the example illustrated in fig. 1, the optical design of the optical lens 100 is described taking an example in which the first optical surface 110 includes two reflection regions having the optical axis of the optical lens 100 as a central axis and the second optical surface 120 includes two reflection regions having the optical axis as a central axis, here, in order to describe that the two reflection regions defining the first optical surface 110 are the second reflection region 112 and the fourth reflection region 113 and the two reflection regions defining the second optical surface 120 are the first reflection region 121 and the third reflection region 122. That is, in the example illustrated in fig. 1, the at least one reflection region of the first optical surface 110 includes a second reflection region 112 and a fourth reflection region 113 from an edge region of the first optical surface 110 toward a middle region of the first optical surface 110, the at least one reflection region of the second optical surface 120 includes a first reflection region 121 and a third reflection region 122 from an edge region of the second optical surface 120 toward a middle region of the second optical surface 120, wherein the first reflection region 121 faces the first refraction region 111 of the first optical surface 110, the second reflection region 112 faces the first reflection region 121, the third reflection region 122 faces the second reflection region 112, the fourth reflection region 113 faces the third reflection region 122, and the second refraction region 123 of the second optical surface 120 faces the fourth reflection region 113.

In particular, in the embodiment of the present application, each of the reflection areas includes two reflection half areas symmetrically distributed about the optical axis set by the optical lens 100, for example, in the example illustrated in fig. 4, each of the reflection areas is an annular reflection area including two semi-annular reflection half areas symmetrically distributed about the optical axis set by the optical lens 100. Of course, in the embodiment of the present application, each of the reflection regions may be implemented in a different shape, or each of the reflection regions may have a different shape, so that it is only required that each of the reflection regions includes two reflection half regions symmetrically distributed about the optical axis set by the optical lens 100.

Accordingly, during imaging, imaging light from the outside enters the optical lens 100 from the first reflection region 111 located at the edge region of the first optical surface 110 and propagates along the transmission member 130 toward the first reflection region 121 located at the edge region of the second optical surface 120, wherein the first reflection region 121 reflects imaging light toward the second reflection region 112 of the first optical surface 110, the second reflection region 112 reflects imaging light from the first reflection region 121 toward the third reflection region 122, the third reflection region 122 reflects imaging light from the second reflection region 112 toward the fourth reflection region 113, and the fourth reflection region 113 reflects imaging light from the third reflection region 122 toward the second reflection region 123 located at the middle region of the second optical surface 120 and reflects imaging light from the second reflection region 123 of the second optical surface 120 out of the optical lens 100.

That is, in the example shown in fig. 4, the first refraction region 111 located at the edge region of the first optical surface 110 is configured to receive incident light from the object side, the incident light passes through the first refraction region 111 of the first optical surface 110 to reach the first reflection region 121 of the second optical surface 120, the first reflection region 121 of the second optical surface 120 is configured to reflect light from the first refraction region 111 of the first optical surface 110, the second reflection region 112 of the first optical surface 110 is configured to reflect light from the first reflection region 121 of the second optical surface 120, the third reflection region 122 of the second optical surface 120 is configured to reflect light from the second reflection region 112 of the first optical surface 110, the fourth reflection region 113 of the first optical surface 110 is configured to reflect light from the third reflection region 122 of the second optical surface 120, and the second reflection region 123 of the second optical surface 120 is configured to reflect light from the fourth reflection region 113 of the first optical surface 110. That is, after passing through the first refraction region 111 of the first optical surface 110, the incident light is reflected by the first reflection region 121 of the second optical surface 120, the second reflection region 112 of the first optical surface 110, the third reflection region 122 of the second optical surface 120, and the fourth reflection region 113 of the first optical surface 110, and then is refracted by the second refraction region 123 of the second optical surface 120, and then is emitted, and finally is converged to an image plane for imaging.

More specifically, in the embodiment of the present application, it is preferable that the first refractive region 111 of the first optical surface 110 is a plane, that is, the radius of curvature of the first refractive region 111 of the first optical surface 110 is infinity. More preferably, in the embodiment of the present application, the plane set by the first refraction area 111 is perpendicular to the optical axis set by the optical lens 100, which helps to reduce chromatic aberration of the incident light. And, when the first refraction area 111 of the first optical surface 110 is provided as a plane, processing is facilitated.

As shown in fig. 4, in the embodiment of the present application, the height of the first refraction region 111 is the maximum height of the optical lens 100, that is, the height of the highest point of the first refraction region 111 is the highest height of the optical lens 100, and of course, when the first refraction region 111 is a plane, the heights of the respective points of the first refraction region 111 are equal. In order to prevent the first refractive region 111 from being damaged or scratched when the height of the first refractive region 111 is the maximum height of the optical lens 100, in some embodiments of the present application, a protection element may be disposed on the upper surface of the first refractive region 111 to protect the first refractive region 111 from being scratched during the subsequent processing, thereby causing damage. In other embodiments of the present application, the height of the highest point of the fourth reflective area 113 is the highest height of the optical lens 100.

In a specific example of the present application, the protection element may be implemented as a protection film layer or an antireflection film, for example, a protection film may be coated on the first refractive region 111 of the first optical surface 110, so as to protect the first refractive region 111 of the first optical surface 110, and prevent the first refractive region 111 of the first optical surface 110 from being scratched during subsequent processing, thereby causing damage. In another specific example of the present application, the protection element is a glass cover plate, and a groove may be further provided on the first refraction region 111 in order to reduce the overall height dimension of the optical lens 100, wherein the glass cover plate is disposed in the groove and a top surface of the glass cover plate is not higher than a top surface of the optical lens 100, so as to avoid an increase in the height of the optical lens 100. It should be noted that the grooves may further block stray light from entering the optical lens 100.

In other examples of the present application, a filter element may be further disposed on the upper surface of the first refraction area 111, for filtering the imaging light entering the optical lens 100. That is, the filter element may be disposed at the light incident end of the optical lens 100. In order to further avoid an increase in the overall height dimension of the optical lens 100 due to the provision of the filter element on the first refractive region 111, in this specific example, a groove may also be provided on the upper surface of the first refractive region 111, and the filter element may be fitted into the groove. And, the groove formed on the first optical surface 110 may further block stray light from the side surface from entering the optical lens. Of course, in other examples of the present application, an infrared filter may be disposed on the upper surface of the first refractive region 111, that is, the embodiment of the filter element may be adjusted, which is not limited in the present application.

Quantitatively, in the embodiment of the present application, the inner diameter of the first refractive region 111 of the first optical surface 110 is 5mm to 20mm (for example, the inner diameter of the first refractive region 111 of the first optical surface 110 is 12.8 to 17.9 mm), and the outer diameter thereof is 10mm to 100mm, and the angle of view of the optical lens 100 is 1 ° to 30 °. Preferably, the first refractive region 111 of the first optical surface 110 has an inner diameter of 12.8-17.9mm and an outer diameter of 20-38 mm, and the optical lens 100 has a field angle of 2.6 ° 12 °.

The first reflective area 121 of the second optical surface 120 is configured as an aspheric surface, and the first reflective area 121 of the second optical surface 120 is concave toward the object side for converging light. That is, in the embodiment of the present application, the first reflection area is a concave surface that is concave downward. The height of the first reflective area 121 of the second optical surface 120 on the side far from the optical axis is higher than the height of the first reflective area 121 of the second optical surface 120 on the side near the optical axis. Preferably, in the embodiment of the present application, the height of the first reflective area 121 of the second optical surface 120 gradually decreases from the edge area of the optical lens 100 to the central area thereof, that is, the end point of the first reflective area 121 away from the optical axis is the highest point of the first reflective area 121, and the end point of the first reflective area 121 near the optical axis is the lowest point of the first reflective area 121.

It should be noted that, in some examples of the present application, a reflective film may be further disposed on the first reflective area 121 of the second optical surface 120, so as to enhance the intensity of the reflected light and reduce the light loss.

The second reflective area 112 of the first optical surface 110 is configured as an aspheric surface. Specifically, the second reflective area 112 of the first optical surface 110 protrudes toward the image side, so as to diffuse light. That is, in the embodiment of the present application, the second refraction area 112 is a convex surface protruding downward, for diffusing light. In particular, in the embodiment of the present application, the height of the second reflection area 112 of the first optical surface 110 on the side far from the optical axis is higher than the height of the second reflection area 112 of the first optical surface 110 on the side close to the optical axis, that is, the height of the convex surface of the second reflection area 112 gradually decreases from the edge area of the optical lens 100 to the middle area thereof. In some examples of the present application, a reflective film may be further disposed on the second reflective region 112 of the first optical surface 110, so as to enhance the intensity of the reflected light and reduce the light loss.

The third reflective area 122 of the second optical surface 120 is configured as an aspheric surface, and the third reflective area 122 of the second optical surface 120 is concave toward the object side for converging light. That is, in the embodiment of the present application, the third reflective area is a concave surface recessed downward for converging the imaging light. The height of the third reflective area 122 of the second optical surface 120, which is far from the optical axis, is higher than the height of the third reflective area 122 of the second optical surface 120, which is near to the optical axis. Preferably, the concave surface of the third reflective area 122 gradually decreases from the edge area of the optical lens 100 toward the middle area thereof. In some examples of the present application, a reflective film may be further disposed on the third reflective region 122 of the second optical surface 120, so as to enhance the intensity of the reflected light and reduce the light loss.

The fourth reflective area 113 of the first optical surface 110 is configured as an aspheric surface, and the fourth reflective area 113 of the first optical surface 110 is convex toward the image side for diffusing light. Of course, a reflective film may be disposed on the fourth reflective area 113 of the first optical surface 110, so as to enhance the intensity of the reflected light and reduce the light loss. In particular, in the present embodiment, the fourth reflective region 113 of the first optical surface 110 forms a top central region of the optical lens 100. In this embodiment, at least a portion of the central area of the fourth reflective area 113 is devoid of light, and for convenience of installation and positioning, the portion of the fourth reflective area 113 devoid of light may be processed to form a top central area having a concave cone shape. Accordingly, the concave-cone-shaped top surface forms a concave-cone-shaped space that facilitates positioning of the optical lens 100 during installation.

In particular, when the second refractive region 123 of the second optical surface 120 is configured as an aspheric surface protruding toward the object side, it can refract the light reflected by the fourth reflective region 113 of the first optical surface 110, the image plane height to which the non-refracted light is converged is lower than the image plane height to which the refracted light is converged, and the second refractive region 123 of the second optical surface 120 is configured as an aspheric surface protruding toward the object side, so that the height of the camera module can be reduced under the condition that the optical path is unchanged and the imaging is clear, which is beneficial to miniaturization of the camera module.

And, the difference in height between the second refractive area 123 of the second optical surface 120 and the imaging surface 140 of the optical lens 100 is 0.4-1.6mm, that is, in the embodiment of the present application, the back focal value of the optical lens 100 is 0.1-4mm. It should be noted that in the embodiment of the present application, the height difference between the second refractive area 123 of the second optical surface 120 and the imaging surface 140 of the optical lens 100 is smaller, so that the TTL of the image capturing module is reduced, so that the image capturing module realizes the tele function, and meanwhile, the height dimension is reduced, which is beneficial to miniaturization of the tele image capturing module. In particular, TTL (total track length) in the present embodiment represents the total height dimension taken up by imaging light after entering the optical lens and after being folded a plurality of times in the height direction.

It is worth mentioning that, in the embodiment of the present application, the ratio between the surface width of the optical lens 100 and the number of reflections is 0.5 to 5, and the surface width of the optical lens 100 represents the lateral dimension of the cross section of the optical lens 100 in the direction perpendicular to the optical axis.

In particular, in the embodiment of the present application, as shown in fig. 4, the first reflective area 121 and the third reflective area 122 of the second optical surface 120 are adjacent, and a smooth inclined curved surface is formed between the first reflective area 121 and the third reflective area 122, and by this configuration, not only the manufacturing difficulty of the first reflective area 121 and the third reflective area 122 of the second optical surface 120 is reduced, but also the maximum light entering amount can be obtained.

More specifically, the first refractive region 111 of the first optical surface 110 has an inner diameter D1 and an outer diameter D2, and the optical lens 100 has an opening ratio of the inner diameter to the outer diameter, i.e., D1/D2. Accordingly, when the opening ratio of the optical lens 100 is minimum, the amount of light entering the optical lens 100 is maximum. Further, the first reflective area 121 and the third reflective area 122 of the second optical surface 120 are disposed opposite to the first refractive area 111 of the first optical surface 110, so that the light incident through the first refractive area 111 of the first optical surface 110 will be reflected by the first reflective area 121 and the third reflective area 122 of the second optical surface 120, and the first reflective area 121 and the third reflective area 122 have converging effect on the light, i.e. the light passing through the first reflective area 121 and the third reflective area 122 has the characteristics of narrow top and wide bottom, so that the cambered surface where the first reflective area 121 and the third reflective area 1212 are located is lower, and the width of the light reaching the first reflective area 121 and the third reflective area 122 will be larger. That is, in the case where the height of the optical lens 100 is limited, it is possible to maximize space utilization and improve imaging effect by filling the internal space of the optical lens 100 with a light beam as much as possible.

Also, in the present embodiment, the height difference between the first and third

reflective regions

121 and 122 of the second optical surface 120 affects the width of the light on the first and third

reflective regions

121 and 122. It should be noted that, since the light rays cannot interfere with each other and the height difference between the first reflective area 121 and the third reflective area 122 of the second optical surface 120 affects the aperture ratio of the optical lens 100, and thus affects the amount of light entering the optical lens 100 and the distribution of the light beam in the internal space of the optical lens 100, when the first reflective area 121 and the third reflective area 121 of the second optical surface 120 are adjacent and a smooth inclined curved surface is formed between the first reflective area 121 and the third reflective area 122, the aperture ratio of the optical lens 100 is the largest and the amount of light entering the optical lens 100 is the largest, so that the light rays propagate in the optical lens and are less prone to interfere. In a specific example of the present application, the aperture ratio of the optical lens 100 is between 0.1 and 0.95, and the height difference between the first reflective area and the third reflective area of the second optical surface refers to the distance between the lowest point of the first reflective area and the highest point of the third reflective area.

Specifically, in an embodiment of the present application, the width of the first reflective area 121 of the second optical surface 120 is greater than 0.5 times the width of the third reflective area 122. The effective focal length setting of the optical lens 100 has a certain effect on the width of the first reflective area 121 and the width of the third reflective area 122 of the second optical surface 120. Specifically, as the effective focal length of the optical lens 100 is greater, the width of the first reflective region 121 of the second optical surface 120 is greater, and the width of the third reflective region 122 is smaller. In another specific example of the present application, the width of the first reflective area 121 is greater than 0.7 times the width of the second reflective area 122; in another specific example of the present application, the width of the first reflective area 121 is greater than 0.9 times the width of the second reflective area 122. That is, the width of the first reflective area 121 and the width of the third reflective area 122 of the second optical surface 120 are reasonably set, which contributes to the improvement of the imaging quality.

It should be noted that, in the embodiment of the present application, the height of the outermost side of the third reflective area 122 of the second optical surface 120 is flush with the height of the innermost side of the first reflective area 121 of the second optical surface 120, so as to prevent the two mirror edges from being bumped and damaged due to the protrusions, and facilitate manufacturing. Of course, in another specific example of the present application, the first reflective area 121 and the third reflective area 122 are connected by a gently inclined curved surface, that is, the height of the lowest point of the first reflective area 121 is higher than the height of the highest point of the third reflective area 122, so as to facilitate the formation of the first reflective area 121 and the third reflective area 122.

Further, in the embodiment of the present application, a difference between the height of the highest point (e.g., B as illustrated in fig. 4) of the fourth reflection region 113 and the height of the highest point (e.g., a as illustrated in fig. 4) of the second reflection region is 1mm or less. Note that in the embodiment of the present application, the imaging light is incident on the first reflective region 121 of the second optical surface 120 by the first refractive region 111 of the first optical surface 100, then reflected by the first reflective region 121 of the second optical surface 120 to the second reflective region 112 of the first optical surface 110, then reflected by the second reflective region 112 of the first optical surface 110 to the third reflective region 122 of the second optical surface 120, then reflected by the third reflective region 122 of the second optical surface 120 to the fourth reflective region 113 of the first optical surface 110, finally reflected by the fourth reflective region 113 of the first optical surface 110 to the second refractive region 123 of the second optical surface 120, and then exits the optical lens 100. In the path of light propagation, the fourth reflective area 113 of the first optical surface 110 is the maximum height that the imaging light can reach, that is, in this embodiment, the optical lens 100 has a special surface configuration such that the highest point of the propagation path of the imaging light in the optical lens 100 is formed on the fourth reflective area 113. Accordingly, the height of the highest point of the fourth reflective area 113 of the first optical surface 110 is set to be greater than the maximum height of the second reflective area 112, and the arrangement mode can make full use of the height space of the optical lens 110, so that the optical path through which the light passes is longer, and the imaging effect is better.

Further, in the embodiment of the present application, the first reflective area 121 and the third reflective area 122 of the second optical surface 120 are capable of converging light, so when the distance between the first reflective area 121 of the second optical surface 120 and the second reflective area 112 of the first optical surface 110 is larger, the light reaches the second reflective area 112 of the first optical surface 110 after passing through the first reflective area 121 of the second optical surface 120, and the light converging effect is better; similarly, when the distance between the third reflective region 122 of the second optical surface 120 and the fourth reflective region 113 of the first optical surface 110 is greater, the light passes through the third reflective region 123 of the second optical surface 120 and reaches the fourth reflective region 113 of the first optical surface 110, so that the light condensing effect is better, in theory, the greater the distance between the first reflective region 121 of the second optical surface 120 and the second reflective region 112 of the first optical surface 110 is, and the greater the distance between the third reflective region 122 of the second optical surface 120 and the fourth reflective region 113 of the first optical surface 110 is, the better. However, in the technical solution of the present application, the height of the second reflection area 112 of the first optical surface 110 is limited by the height of the fourth reflection area 113 of the first optical surface 110, and the height of the fourth reflection area 113 of the first optical surface 110 is limited by the maximum height of the optical lens 100, and accordingly, in order to achieve global optimization in optical performance and structural design, in the embodiment of the present application, the difference between the height of the highest point of the fourth reflection area and the height of the highest point of the second reflection area is less than or equal to 1mm.

From another perspective, in an embodiment of the present application, the difference between the maximum height of the fourth reflective region 113 of the first optical surface 110 and the maximum height of the second reflective region 112 is less than 20% of the total optical height (e.g., H as illustrated in fig. 6) of the optical lens 100. That is, the difference between the height of the highest point of the fourth reflective area 113 and the height of the highest point of the second reflective area 112 is less than 20% of the total optical height of the optical lens 100, wherein the total optical height of the optical lens represents the distance between the highest point of the imaging light on the propagation path within the optical lens and the image plane of the optical lens. Further, in the present embodiment, the difference between the maximum height of the fourth reflective region 113 of the first optical surface 110 and the maximum height of the second reflective region 112 is less than 13% of the total optical height.

Further, since the fourth reflective area 113 and the second reflective area 112 of the first optical surface 110 have a certain height difference, in a specific example of the application, as shown in fig. 4, the fourth reflective area 113 and the second reflective area 112 of the first optical surface 110 are connected by an inclined plane 114. In this specific example, as shown in fig. 6 and 7, the inclined surface 114 is an arc-shaped inclined surface 114, an inner edge of the arc-shaped inclined surface 114 is connected to an outer edge of the fourth reflection region 113, and an outer edge of the arc-shaped inclined surface 114 opposite to the inner edge is connected to an inner edge of the second reflection region 112. In this application, the arc-shaped inclined surface 114 may be injection molded or formed with the first optical surface 110 and the second optical surface 120 at one time, and the arc-shaped inclined surface 114 is gentle, so that the demolding difficulty can be reduced. Further, the one-time injection molding is also beneficial to reducing the tolerance of the optical lens, so that the imaging quality is better. Of course, it should be understood that, in the present application, the inclined surface 114 may be formed by a cutting process after the first optical surface 110 and the second optical surface 120 are injection molded, which is not limited in this application. In another specific example of the present application, as shown in fig. 5, the inclined surface 114 is a planar inclined surface 114, which not only is simpler to mold, but also can increase the roughness to reduce the direct reflection imaging proportion of the stray light.

More specifically, in order to avoid the influence of stray light, in a specific example of the present application, a reflective film may be coated on the inclined surface 114 to avoid the external stray light from entering the optical lens 100 through the inclined surface 114. In another specific example of the present application, the inclined surface 114 is coated with a black material, so that, on one hand, external stray light can be prevented from entering the optical lens 100 through the inclined surface 114, and on the other hand, stray light reflected to the inclined surface 114 in the optical lens 100 can be absorbed, so as to avoid affecting the imaging effect. In another specific example of the present application, the inclined surface 114 may be roughened, which is not limited in this application.

It should be understood that the optical design of the optical lens 100 as illustrated in fig. 4 to 7 absorbs the design concept and characteristics of a fold-back camera, and a plurality of reflective regions which are alternately opposite to each other are arranged on a piece of optical lens 100 so that the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.1-0.4 through the special optical design, so that the camera module provided with the optical lens 100 can achieve both long-focal shooting effect and large caliber and large image surface.

It should be noted that in the optical lens 100 illustrated in fig. 4 to 7, the optical lens 100 includes four reflection regions, that is, the imaging light entering the optical lens 100 passes out of the optical lens 100 after four reflections. In a specific example, when the optical lens 100 includes four reflection areas, the imaging surface 140 of the optical lens 100 has a diameter of 6.4mm, the optical lens has a thickness of 7.14mm, the aperture of the optical lens is 25.5mm, and the back focus of the optical lens is 0.8mm; the effective focal length of the optical lens is 30.6mm; and the FNO of the optical lens is 1.2. TTL/efl=0.26 at this time; the ratio of the diameter of the imaging surface 140 of the optical lens 100 to the total optical length of the camera module is: 0.8; the ratio of the effective focal length of the camera module to the diameter of the image surface of the optical lens is 4.8.

Schematic camera module 1

As shown in fig. 8, a camera module according to an embodiment of the present application is illustrated, where the camera module includes: a photosensitive assembly 10 and an optical lens 30 held on a photosensitive path of the photosensitive assembly 10.

In the embodiment of the present application, the optical lens 30 includes a lens barrel 31 and at least one optical lens 100 as described above mounted on the lens barrel 31. Particularly, in the embodiment of the application, the optical lens 100 absorbs the design thought and characteristics of the fold-back camera, and a plurality of reflective areas which are mutually alternate and opposite are arranged on one optical lens 100 so that the ratio between the total optical length of the optical lens 100 and the effective focal length thereof is 0.01-0.5 through the special optical design, so that the image pickup module provided with the optical lens 100 can achieve the long-focus shooting effect and realize the large caliber and the large image plane at the same time.

Accordingly, the photosensitive assembly 10 includes: a circuit board 11, a photosensitive chip 12, a lens base 13 and a filter element 14, wherein the circuit board 11 is used as a mounting substrate of the photosensitive assembly 10. Specifically, the photosensitive chip 12 is electrically connected to the circuit board 11 (for example, in one example, the photosensitive chip 12 is mounted on the upper surface of the circuit board 11 and is electrically connected to the circuit board 11 by wire bonding), so that the circuit board 11 provides the control circuit and the electric power required for the operation of the photosensitive chip 12.

The lens mount 13 is disposed on the circuit board 11 and is used for supporting other components, wherein the lens mount 13 has an optical window corresponding to at least a photosensitive region of the photosensitive chip 12. For example, in one specific example of the present application, the lens holder 13 is implemented as a separately molded plastic holder that is attached to the surface of the circuit board 11 by an adhesive and is used to support other components. Of course, in other examples of the present application, the lens base 13 may be formed on the circuit board 11 in other manners, for example, the lens base 13 is implemented as a molded lens base 13 integrally formed at a predetermined position of the circuit board 11 through a molding process.

Further, in some specific examples of the present application, the optical filter element 14 may be mounted on the lens base 13, so that the optical filter element 14 is kept on the photosensitive path of the photosensitive chip 12, so that, during the process of passing the external light through the optical filter element 14 to reach the photosensitive chip 12, the stray light in the external light can be filtered by the optical filter element 14, so as to improve the imaging quality.

Fig. 9 illustrates a schematic diagram of a variant implementation of the camera module according to an embodiment of the present application. As shown in fig. 9, in this modified embodiment, the filter element 14 is disposed above the first refraction region 111 of the first optical surface 110 of the optical lens 100 of the optical lens 30 (for example, a filter film structure is plated above the first refraction region 111 of the first optical surface 110 to achieve a filtering effect). It should be understood that, in this modified embodiment, the lens holder 13 circumferentially disposed around the photosensitive chip 12 and the filter element 14 disposed between the optical lens 30 and the photosensitive chip 12 are also omitted, compared with the image capturing module illustrated in fig. 8, so that the height dimension of the image capturing module can be reduced.

In the embodiment of the present application, the imaging surface 140 of the optical lens 100 is formed on the photosensitive chip 12, where the half-image height hima of the imaging surface is 0.5mm-8mm, that is, the radius of the imaging surface is 1mm-16mm. Also, it should be noted that, in the embodiment of the present application, the first reflective area 121 of the second optical surface 120 and the third reflective area 122 of the second optical surface 120 are higher than the imaging surface 140, where a ratio between a diameter of the fourth reflective area 113 of the first optical surface 110 and a height between the fourth reflective area 113 of the first optical surface 110 and the imaging surface 140 is 0.5-2, a ratio between a diameter of the imaging surface 140 of the optical lens 30 and an optical total length of the image capturing module is 0.5-0.8, and a ratio between an effective focal length of the image capturing module and a diameter of the imaging surface 140 of the optical lens 30 is 4.8-9.6.

Fig. 10 illustrates an example diagram of another variant implementation of the camera module according to an embodiment of the present application. As shown in fig. 10, in this variant embodiment, the image capturing module further includes a lens structure 20 disposed between the optical lens 30 and the photosensitive chip 12, wherein the back focus of the image capturing module can be adjusted by moving the lens structure 20 to achieve focusing, so that the back focus space can be reasonably utilized, and the image capturing module is more compact. Preferably, the lower surface of the lens structure 20 may be flush with the second optical surface 120 of the optical lens 100 of the optical lens 30, so as to further reduce the height of the camera module. In this embodiment, the upper and lower surfaces of the lens structure may be used to participate in image correction, improving imaging quality, while the lens structure 20 may be used to reduce distortion and improve field curvature.

Fig. 11 illustrates a schematic diagram of yet another variant implementation of the camera module according to an embodiment of the present application. As shown in fig. 11, in this modified embodiment, the optical lens 100 of the optical lens 30 is provided with a greater number of reflection areas. As described above, when the number of reflection regions of the optical lens 100 increases, the cross-sectional area of the optical lens 100 increases, and since the first refractive region 111 of the first optical surface 110 is located at the outermost side of the optical lens 100, the diameter of the optical lens 100 increases, resulting in an increase in the inner and outer diameters of the first refractive region 111 of the first optical surface 110. Accordingly, in the case where the width of the first refractive region 111 of the first optical surface 110 is fixed, the area of the first refractive region 111 of the first optical surface 110 increases, thereby increasing the light entrance amount area of the optical lens 100. Meanwhile, the optical lens 100 has an increased diameter and a reduced FNO value, so that the diffraction limit can be improved, the camera module is applicable to shorter wavelength and smaller pixel size, the whole camera module has better resolution capability, and the camera module is miniaturized.

Fig. 12 illustrates a schematic diagram of yet another variant implementation of the camera module according to an embodiment of the present application. As shown in fig. 12, in this modified embodiment, the image pickup module further includes a driving element 40 for adjusting the relative positional relationship between the photosensitive member 10 and the optical lens 30. One of ordinary skill in the art will appreciate that in conventional upright camera modules, an optical lens is typically mounted in a driving element to drive the optical lens through the driving element to adjust the relative positional relationship between the optical lens and a photosensitive assembly. However, in the embodiment of the present application, since the optical lens 100 of the optical lens 30 is peculiar, that is, the size of the optical lens 100 may be larger than the size of the photosensitive chip 12, the weight of the optical lens 30 may be much larger than that of the conventional optical lens, and thus the conventional driving element may not provide a sufficiently large driving force. Accordingly, in the embodiment of the present application, the driving object of the driving element 40 is imaged as the photosensitive assembly 10, for example, the whole of the photosensitive assembly 10, or the photosensitive chip 13 in the photosensitive assembly 10, as shown in fig. 12, which is not limited in this application. That is, in the embodiment of the present application, the photosensitive assembly 10 is mounted to the driving element 40 to change the positional relationship between the photosensitive assembly 10 with respect to the optical lens 30 by the driving element 40, in such a way that the optical performance of the image pickup module is adjusted.

In the embodiment of the present application, the driving element 40 drives the photosensitive assembly 10 to a stroke greater than 30um, and further, to a stroke greater than 150um. In one specific example of the present application, the stroke driven from infinity focusing to a 5m distance object is 310um, focusing to 10m stroke is 160um, and focusing to 50m stroke is 30um.

It should be noted that, in the embodiment of the present application, since the surface type of the optical lens 100 is very accurate, the temperature change does not have the complex deformation of multiple components like the conventional lens, and the image plane caused by the change of the lens thickness is mainly moved parallel to the optical axis, so that the image change caused by the temperature change can be compensated by moving the photosensitive assembly 10, that is, the distance between the photosensitive assembly 10 and the optical lens 100 in the optical axis direction can be clearly imaged as long as the distance is changed at different temperatures. The ratio of this movement distance to the temperature change is about 160 c/130 um, i.e. 0.5-1.5um per c.

In a specific implementation, the driving element 40 may be implemented as a voice coil motor, a memory alloy motor, a piezoelectric actuator, or the like, i.e., the type of the driving element 40 is not limited in this application. In addition, in the embodiment of the present application, the driving element 40 may perform optical focusing by driving the photosensitive assembly 10 or perform optical anti-shake by driving the photosensitive assembly 10, it should be understood that when the driving element 40 drives the photosensitive assembly 10 to move along the photosensitive path set by the photosensitive assembly 10, the driving element 40 performs optical focusing, and when the driving element 40 drives the photosensitive assembly 10 to move in a plane perpendicular to the photosensitive path, the driving element 40 performs optical anti-shake.

In summary, the image capturing module according to the embodiment of the present application is illustrated, where the optical lens 30 of the image capturing module has a special optical design, so that the image capturing module not only can achieve the long-focus capturing effect, but also can achieve a large aperture and a large image plane.

Schematic camera module 2

As shown in fig. 14, a camera module according to another embodiment of the present application is illustrated, wherein the camera module includes: a photosensitive assembly 10, an optical lens 100 held on a photosensitive path of the photosensitive assembly 10, and a driving assembly 50 for adjusting optical performance of the image pickup module. It should be noted that in the present embodiment, the optical lens 100 is held on the photosensitive path of the photosensitive assembly 10 in such a manner as to be directly mounted on the driving assembly 50.

As described above, in the embodiment of the present application, the first optical surface 110 of the optical lens 100 is the light incident side (i.e. corresponding to the object side) and the second optical surface 120 thereof is the light emitting side (i.e. corresponding to the image side), and accordingly, in the embodiment of the present application, the optical lens 100 is held on the photosensitive path of the photosensitive assembly 10 in such a manner that the second optical surface 120 thereof is mounted on the driving assembly 50. More specifically, in the embodiment of the present application, only the middle area of the outer surface of the second optical surface 120 of the optical lens 100 is provided with an optical area (i.e., the second refractive area 123), that is, a structural area (not illustrated in the drawing) may be disposed around the second refractive area 123 of the second optical surface 120 so that the optical lens 100 may be directly mounted on the driving assembly 50.

Accordingly, in a specific example of the present application, the optical lens 100 may not be configured as a lens barrel but the optical lens 100 may be directly mounted on the driving assembly 50 to avoid an increase in size due to the introduction of the lens barrel. Of course, in other examples of the present application, a lens barrel may be configured for the optical lens 100, wherein the optical lens 100 is accommodated in the lens barrel to provide protection for the optical lens 100 through the lens barrel.

Accordingly, in the embodiment of the present application, the driving component 50 is configured to drive the optical lens 100 and/or the photosensitive component 10 to move so as to adjust the relative positional relationship between the optical lens 100 and the photosensitive component 10, so as to adjust the optical performance of the image capturing module.

In a specific example of the present application, the driving component 50 is configured to drive the photosensitive component 10 to translate along the X-axis direction or the Y-axis direction to implement optical anti-shake, and/or drive the photosensitive component 10 to translate along the Z-axis direction to implement optical focusing. Here, in the embodiment of the present application, the Z-axis direction is a direction set by the photosensitive path of the photosensitive assembly 10, the X-axis direction is a length direction of the photosensitive assembly 10, the Y-axis direction is a width direction of the photosensitive assembly 10, and the X-axis direction and the Y-axis direction are perpendicular to each other, and the Z-axis direction is perpendicular to a plane in which the X-axis direction and the Y-axis direction are located, that is, the X-axis, the Y-axis, and the Z-axis form a three-dimensional coordinate system.

In another specific example of the present application, the driving component 50 is configured to drive the photosensitive component 10 to move along the Z-axis direction, and/or drive the optical lens 100 to move along the X-axis direction and/or the Y-axis direction, so as to implement the optical anti-shake and optical focusing functions of the camera module. In yet another specific example of the present application, the driving component 50 is configured to drive the photosensitive component 10 and/or the optical lens 100 to rotate around the X-axis or around the Y-axis to implement the Tilt anti-shake function of the camera module.

In particular, in consideration of the optical lens 100 of the embodiment of the present application having a relatively large width size and a relatively large weight, if a driving object of the driving assembly 50 is set as the optical lens 100, the driving assembly 50 needs to provide a larger driving force to drive the optical lens 100 to move, which puts a higher demand on an actuator. Also, since the optical lens 100 has a relatively large lateral dimension, a small installation space can be left for the driving assembly 50 in the lateral direction of the optical lens 100. Therefore, preferably, in the embodiment of the present application, the photosensitive assembly 10 is selected as the driving object of the driving assembly 50.

The driving assembly 50 is described below taking the photosensitive assembly 10 as an example of a driving object of the driving assembly 50. As shown in fig. 13 to 17, in the embodiment of the present application, the driving assembly 50 includes a driving housing 51 having a receiving cavity 510, a first driving element 52, a second driving element 53, an anti-shake carrier 54, and a focusing carrier 55, where the first driving element 52, the second driving element 53, the anti-shake carrier 54, and the focusing carrier 55 are all received in the receiving cavity 510 of the driving housing 51, and in this way, each component in the driving assembly 50 can be effectively protected from being damaged due to impact, and meanwhile, dust, dirt, or stray light can be prevented from entering the interior of the driving assembly 50.

Accordingly, in the embodiment of the present application, the first driving element 52 is adapted to drive the photosensitive assembly 10 to move in a plane set by the photosensitive assembly 10 for optical anti-shake, that is, the first driving element 52 is an anti-shake driver for driving the photosensitive assembly 10 to move along the X-axis direction and the Y-axis direction; and the second driving element 53 is adapted to drive the photosensitive assembly 10 to move along the photosensitive path for optical anti-shake, that is, the second driving element 53 is a focusing driver for driving the photosensitive assembly 10 to move along the Z-axis direction for optical focusing.

It should be noted that in the present embodiment, the optical lens 100 has a relatively large width dimension, and in the present embodiment, the lateral dimension of the optical lens 100 is larger than or nearly equal to the lateral dimension of the driving housing 51 of the driving assembly 50, and thus, when the first driving element 52 and the second driving element 53 are disposed in the driving housing 51, the first driving element 52 and the second driving element 53 are located inside the outermost edge (i.e., the side close to the optical axis) of the optical lens 100, in terms of quantification. Also, in some embodiments of the present application, the outermost edge of the optical lens 100 protrudes beyond the outermost edge of the driving housing 51. Of course, in other embodiments of the present application, the outermost edge of the optical lens 100 may also be located inside the outermost edge of the driving housing 51 (i.e., on the side closer to the optical axis). Here, in the present embodiment, the outermost edge of the driving housing 51 represents the edge of the driving housing 51 furthest with respect to the optical axis, and the outermost edge of the optical lens 100 represents the edge of the optical lens 100 furthest with respect to the optical axis.

Further, as shown in fig. 13 to 17, in the embodiment of the present application, the focusing carrier 55 is movable relative to the anti-shake carrier 54, for example, in a specific example, the focusing carrier 55 is suspended from the anti-shake carrier 54, so that the focusing carrier 55 can be driven to move relative to the anti-shake carrier 54. The photosensitive assembly 10 is disposed on the focusing carrier 55, and the second driving element 53 is fixed on the anti-shake carrier 54 and adapted to drive the focusing carrier 55 to move along the photosensitive path so as to drive the photosensitive assembly 10 to move along the photosensitive path. The first driving element 52 is disposed between the anti-shake carrier 54 and the substrate 512 and is adapted to drive the anti-shake carrier 54 to move in a plane set by the photosensitive assembly 10 so as to drive the second driving element 53, the focusing carrier 55 and the photosensitive assembly 10 to move in a plane set by the photosensitive assembly 10. That is, in the embodiment of the present application, the second driving element 53 is disposed in the first driving element 52, where the second driving element 53 is adapted to drive the focusing carrier 55 to mobilize the photosensitive assembly 10 for optical focusing, and the first driving element 52 is adapted to drive the anti-shake carrier 54 to drive the second driving element 53, the focusing carrier 55 and the photosensitive assembly 10 to move in a plane set by the photosensitive assembly 10 for optical anti-shake.

It should be noted that, in other examples of the present application, the first driving element 52 may be disposed in the second driving element 53, which is not limited in this application.

As shown in fig. 13 to 17, in the embodiment of the present application, the first driving element 52 is disposed in the driving housing 51 along the horizontal direction set by the driving housing 51, and the second driving element 53 is disposed in the driving housing 51 along the height direction set by the driving housing 51. That is, the first driving element 52 and the second driving element 53 make full use of the three-dimensional space formed by the accommodating chamber 510 to promote compactness of the element arrangement of the driving assembly 50.

Specifically, in the embodiment of the present application, the first driving element 52 is circumferentially disposed around the photosensitive assembly 10, and the second driving element 53 is disposed in the first driving element 52 and extends along the height direction set by the driving assembly 50. That is, in the embodiment of the present application, if the outer edge of the optical lens 100 is used as a reference standard, the first driving element 52 is more adjacent to the photosensitive element 10 than the second driving element 53, and if the photosensitive element 10 is used as a reference standard, the second driving element 53 is more adjacent to the photosensitive element 10 than the first driving element 52.

More specifically, in the embodiment of the present application, the driving housing 51 includes an upper cover 511 and a base 512 that are fastened to each other, and the upper cover 511 and the base 512 that are fastened to each other form a receiving cavity 510 for receiving the first driving element 52 and the second driving element 53 therein. The first driving element 52 is disposed between the anti-shake carrier 54 and the base 512, as shown in fig. 13 to 17. In particular, in the embodiment of the present application, the first driving element 52 is implemented as a voice coil motor, which includes at least one magnet 521 and at least one coil 522 corresponding to the at least one magnet 521. In order to achieve anti-shake in the X-axis direction and the Y-axis direction, in a specific example of the present application, the first driving element 52 includes four coils 522 disposed on four sides of the substrate 512 and four magnets 521 disposed on four sides of the anti-shake carrier 54 and corresponding to the four coils 522.

It should be noted that, in other examples of the present application, the mounting positions of the coil 522 and the magnet 521 of the first driving element 52 may be changed, that is, the magnet 521 is mounted on the substrate 512, and the coil 522 is mounted on the anti-shake carrier 54. In particular, the arrangement of mounting the coil 522 to the substrate 512 facilitates configuring the coil 522 with an electrical connection arrangement. Also, it should be noted that in other examples of the present application, a fewer or greater number of coil-magnet pairs may be configured, for example, 2 coil-magnet pairs may be disposed only on two adjacent sides of the substrate 512 and the anti-shake carrier 54, which is not limited to the present application.

In order to improve the stability of the movement of the first driving element 52 during the optical anti-shake process, as shown in fig. 13 to 17, in the embodiment of the present application, the driving assembly 50 further provides a supporting assembly 56 between the anti-shake carrier 54 and the base 512 to provide a stable surface support for the anti-shake carrier 54 during the movement to perform the optical anti-shake process by the supporting assembly 56, so that the anti-shake carrier 54 can be smoothly moved. Accordingly, to provide facial support, the number of support assemblies 56 is at least 3, and the at least three support assemblies 56 are arranged in a non-entirely collinear manner.

In the present embodiment, the at least three support assemblies 56 include four support assemblies 56 located at four corners between the base 512 and the anti-shake carrier 54. It will be appreciated that locating the four support assemblies 56 at four corner locations between the anti-shake carrier 54 and the base 512 may fully utilize the free space within the drive assembly 50, i.e., improve the space utilization of the drive assembly 50 such that the drive assembly 50 has a relatively more compact structure and compact size.

In the embodiment of the present application, each of the support assemblies 56 includes a track and at least one ball disposed in the track, it should be understood that, since the at least one ball is disposed in the track, the movement track of the at least one ball is also limited in the track, i.e., the support assemblies 56 can also provide a guiding function for the movement of the anti-shake carrier 54. Specifically, in the embodiment of the present application, the track may be concavely formed on the substrate 512, or the track may be concavely formed on the anti-shake carrier 54, or the track may include a track formed on the substrate 512 and a track formed on the anti-shake carrier 54, which is not limited in this application. It should be noted that, when the tracks include a first track concavely formed on the substrate 512 and a second track concavely formed on the anti-shake carrier 54, it is preferable that the first track and the second track are disposed opposite to each other, for example, the first track and the second track are perpendicular to each other to form a cross track groove structure; more preferably, the first rail extends along the X-axis direction and the second rail extends along the Y-axis direction, such that the first rail and the second rail are perpendicular to each other and form a cross-shaped rail groove structure.

In order to enable the support assembly 56 to be more stably clamped between the base 512 and the anti-shake carrier 54, as shown in fig. 13 to 17, in the embodiment of the application, the driving assembly 50 further includes a magnetic attraction member 57 disposed at the base 512, wherein the magnetic attraction member 57 is disposed opposite to the magnet 521 of the first driving element 52 such that the anti-shake carrier 54 is attracted to the base 512 by a magnetic attraction force therebetween, and the support assembly 56 is disposed between the anti-shake carrier 54 and the base 512, and thus, the support assembly 56 can be stably clamped between the anti-shake carrier 54 and the base 512 by the magnetic attraction force. Accordingly, when the support member 56 is stably clamped between the anti-shake carrier 54 and the base 512, the support member 56 can always maintain frictional contact with the anti-shake carrier 54 to provide more stable surface support and guiding.

Further, since the magnetic attraction member 57 and the magnet 521 are disposed opposite to each other along the Z-axis direction, that is, the direction of the magnetic attraction between the magnetic attraction member 57 and the magnet 521 is along the Z-axis direction, the anti-shake carrier 54 can be effectively prevented from falling off along with the shake or inversion of the camera module. In an implementation, the magnetic member 57 may be disposed on an inner bottom surface of the base 512, and preferably, the magnetic member 57 may be integrally formed in the base 512 through an injection molding process, so that it may not occupy an inner space of the driving assembly 50.

It should be noted that, when the positions of the magnet 521 and the coil 522 of the first driving element 52 are exchanged, the magnetic attraction member 57 may be disposed in the anti-shake carrier 54 and correspond to the magnet 521, which is not limited in this application.

Further, in the embodiment of the present application, the second driving element 53 disposed in the first driving element 52 is adapted to drive the photosensitive assembly 10 to move along the Z-axis direction for optical focusing. In a specific example of the present application, the second driving element 53 and the first driving element 52 may be implemented as the same type of driver, i.e. the second driving element 53 may also be implemented as a voice coil motor. It should be appreciated that when the first driving element 52 and the second driving element 53 are simultaneously implemented as voice coil motors, electromagnetic interference may occur between the first driving element 52 and the second driving element 53 to affect the accuracy of optical focusing and/or optical anti-shake. Thus, in other examples of the present application, the second driving element 53 and the first driving element 52 may be implemented as different types of actuators, for example, the second driving element 53 is implemented as a piezoelectric actuator, as shown in fig. 13 to 17.

Accordingly, in the present embodiment, the second driving element 53 implemented as a piezoelectric actuator is fixed to the anti-shake carrier 54 and extends in the height direction set by the driving assembly 50. It should be noted that in the present embodiment, the first driving element 52 is disposed below the anti-shake support 54, and the second driving element 53 is disposed above the anti-shake support 54, and thus, in some examples of the present application, the height of the disposed position of the first driving element 52 is lower than the disposed position of the second driving element 53, that is, the height of the disposed position of the second driving element 53 is higher than the disposed position of the first driving element 52. Of course, in other examples of the present application, the first driving element 52 and the second driving element 53 may also take on other relative positional relationships in the height direction, for example, the first driving element 52 and the second driving element 53 may partially overlap in the height direction, which is not limited to the present application.

In order to more fully utilize the internal space of the driving assembly 50, in the embodiment of the present application, as shown in fig. 13 to 17, the second driving element 53 is fixed to one corner of the anti-shake carrier 54.

Accordingly, in the embodiment of the present application, the second driving element 53 includes a piezoelectric element 531, a driving rod 532, and a clamping member 533. As shown in fig. 13 to 17, in the embodiment of the present application, the piezoelectric element 531 is fixed to the anti-shake carrier 54, the driving lever 532 extends upward from the piezoelectric element 531, and the clip 533 is mounted on the driving lever 532 and is held in frictional contact with the driving lever 532.

Specifically, in the embodiment of the present application, one end of the clamping member 533 is clamped to the driving rod 532 to maintain frictional contact with the driving rod 532, and the other end of the clamping member 533 is inserted into the focusing carrier 55, so that when the driving rod 532 moves under the driving of the piezoelectric element 531, the clamping member 533 moves in a stepping manner with the focusing carrier 55 to perform optical focusing due to the frictional contact with the driving rod 532 and due to inertia. That is, in the present embodiment, the holder 533 has two holding portions, one holding portion for holding the driving rod 532 in frictional contact with the holder 533, and the other holding portion for inserting the focus carrier 55 so that the holder 533 is fixed to the focus carrier 55.

It should be noted that, in the embodiment of the present application, the clamping member 533 may be provided with only one clamping portion, for example, the clamping member 533 is integrally formed with the focusing carrier 55, and the clamping member 533 is kept in frictional contact with the driving rod 532 by one clamping portion. It should be noted that the piezoelectric element 531, the driving lever 532, and the holder 533 of the second driving element 53 are arranged along the Z-axis direction, and thus, when the holder 533 is integrally formed with the focus carrier 55, errors of the second driving element 53 during subsequent assembly can be reduced.

In order to guide the movement of the focus carrier 55 to improve the movement stability of the focus carrier 55, a guide member 534 is provided at a diagonal position of the second driving element 53. In a specific example of the present application, the guide member 534 includes a guide ring provided to the focus carrier 55 and a guide rod passing through the guide ring, wherein the guide rod extends along the Z-axis direction.

In order to further improve the space utilization of the driving assembly 50, as shown in fig. 13 to 17, in the embodiment of the present application, the anti-shake carrier 54 has a receiving groove 540 concavely formed therein, and the focusing carrier 55 is suspended and received in the receiving groove 540, in this way, an increase in the height dimension of the camera module can be avoided. In order to avoid collision between the focus carrier 55 and the anti-shake carrier 54 during the movement of the focus carrier 55 by the second driving element 53, in a specific example of the present application, further, a limit protrusion 541 protruding upward is provided on an inner bottom surface of the accommodating groove 540, wherein the limit protrusion 541 extends along the Z-axis direction. It should be appreciated that the limiting protrusion 541 may prevent the focusing carrier 55 from directly striking the anti-shake carrier 54 during the moving process, so as to damage the photosensitive assembly 10.

It should be noted that, in the embodiment of the present application, the number of the limiting protrusions 541 is greater than or equal to 2, that is, the anti-shake carrier 54 includes at least two limiting protrusions 541, which are disposed on two opposite sides of the anti-shake carrier 54, respectively, so as to avoid the tilting of the focusing carrier 55.

As shown in fig. 13-17, the drive assembly 50 further includes a position sensing element 58 for monitoring the position of the photosensitive assembly 10. Specifically, in the present embodiment, the position sensing element 58 includes a position sensing element 58 for sensing the position of the photosensitive assembly 10 in the X-axis direction and a position sensing element 58 for sensing the position of the photosensitive assembly 10 in the Y-axis direction. In one specific example of the present application, the position sensing element 58 is disposed on the base 512 and opposite to the magnet 521 for sensing the moving position of the magnet 521. Of course, in other examples of the present application, the position sensing element 58 may be disposed at other positions, for example, the position sensing element 58 may be disposed in the coil 522, or may be disposed on the back of the coil 522, or the position sensing element 58 may be disposed on an electrical connection board of the first driving element 52, so as to facilitate the electrical conduction of the position sensing element 58.

As shown in fig. 13 to 17, in the embodiment of the present application, the driving assembly 50 further includes an electrical connection element 59 for achieving electrical conduction. Specifically, the electrical connection element 59 includes a first circuit board 591 for conducting the first driving element 52 and a second circuit board 592 for conducting the second driving element 53. In particular, in some examples of the present application, the height of the set position of the second circuit board 592 is greater than the height of the set position of the first circuit board 591. Accordingly, the circuit board 11 of the photosensitive assembly 10 extends outward along the gap between the anti-shake carrier 54 and the upper cover 511 through a flexible board.

More specifically, in the present embodiment, the first circuit board 591 is disposed on an inner bottom surface of the base 512 to facilitate conduction of the coil 522 of the first driving element 52. The second circuit board 592 extends from the bottom surface of the anti-shake carrier 54 to the flexible board of the circuit board 11 of the photosensitive assembly 10 and is electrically connected to the circuit board 11 of the photosensitive assembly 10.

It should be noted that, in this embodiment of the present application, the first circuit board 591 is separately connected to the circuit board 11 of the photosensitive assembly 10 and is electrically connected to external electronic devices, that is, the first circuit board 591 and the circuit board 11 of the photosensitive assembly 10 are electrically connected to each other in a spatially independent manner, so that the influence of the counter force of the circuit board 11 of the photosensitive assembly 10 is reduced, that is, the circuit board 11 of the photosensitive assembly 10 drives the photosensitive assembly 10 by the first driving element 52 to generate a force opposite to the driving direction. Further, in the embodiment of the present application, the external electrical connection end of the first circuit board 591 and the external electrical connection end of the circuit board 11 of the photosensitive assembly 10 may be disposed on the same side or on different sides, which is not limited in the present application.

In summary, an image capturing module according to an embodiment of the present application is illustrated, wherein the optical lens 100 of the image capturing module has a specific optical system design such that, after an imaging light enters the optical lens 100, the imaging light is suitable for being emitted from the optical lens 100 after being reflected at least twice in the optical lens 100. Accordingly, the optical lens 100 has a relatively large lateral dimension and a relatively heavy weight, and thus, the image pickup module performs adjustment of optical performance of the image pickup module by driving the photosensitive assembly 10.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.

Claims

1. A camera module, comprising:

a photosensitive assembly;

2. The camera module of claim 1, wherein the optical lens is mounted on a drive housing of the drive assembly.

3. The camera module of claim 2, wherein the first drive element is adapted to drive the photosensitive assembly to move in a plane defined by the photosensitive assembly for optical anti-shake, the drive assembly further comprising a second drive element within the drive housing, the second drive element being adapted to drive the photosensitive assembly to move along the photosensitive path for optical focusing.

4. A camera module according to claim 3, wherein said first drive element is disposed within said drive housing along a horizontal direction set by said drive housing, and said second drive element is disposed within said drive housing along a height direction set by said drive housing.

5. A camera module according to claim 3, wherein said second drive element is located inside said first drive element.

6. A camera module according to claim 3, wherein said second drive element is disposed at a higher position within said drive housing than said first drive element.

7. A camera module according to claim 3, wherein said first drive element is a voice coil motor and said second drive element is a piezoelectric actuator.

8. A camera module according to claim 3, wherein the drive housing comprises a top cover and a base that snap together, the top cover and the base that snap together forming a receiving cavity for receiving the first drive element and the second drive element therein.

9. The camera module of claim 8, wherein the drive housing further comprises an anti-shake carrier and a focus carrier, the focus carrier being suspended from the anti-shake carrier, wherein the photosensitive assembly is disposed on the focus carrier, the second drive element being secured to the anti-shake carrier and adapted to drive the focus carrier to move along the photosensitive path to drive the photosensitive assembly to move along the photosensitive path; the first driving element is arranged between the anti-shake carrier and the substrate and is suitable for driving the anti-shake carrier to move in a plane set by the photosensitive assembly so as to drive the second driving element, the focusing carrier and the photosensitive assembly to move in the plane set by the photosensitive assembly.

10. The camera module of claim 9, wherein the second drive element is secured to the anti-shake carrier at one corner.

11. The camera module of claim 9, wherein the anti-shake carrier has a receiving groove concavely formed therein, the focus carrier being suspended and received in the receiving groove.

12. The camera module according to claim 11, wherein the anti-shake carrier further has a stopper protrusion formed protrusively on an inner bottom surface of the receiving groove, the stopper protrusion being located under the focus carrier.

13. The camera module of claim 9, wherein the drive assembly further comprises at least three support assemblies disposed in a non-collinear manner between the base and the anti-shake carrier.

14. The camera module of claim 13, wherein the at least three support assemblies include four support assemblies at four corners between the base and the anti-shake carrier.

15. The camera module according to claim 1, wherein a ratio between an optical total length of the optical lens and an effective focal length thereof is 0.01 to 0.5, a height of the optical lens is 7.5mm or less, a field angle of the optical lens is 1 ° to 30 °, an f-number of the optical lens is 0.5 to 10, and a ratio between the effective focal length of the optical lens and a diameter of an image plane thereof is 4.8 to 9.6.