WO2022016422A1

WO2022016422A1 - Long-focus module, double-camera module, and electronic device

Info

Publication number: WO2022016422A1
Application number: PCT/CN2020/103539
Authority: WO
Inventors: 江传东
Original assignee: 欧菲光集团股份有限公司; 南昌欧菲光电技术有限公司
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2022-01-27

Abstract

A long-focus module (100), a double-camera module (200), and an electronic device. The long-focus module (100) comprises a first prism (10), a first lens unit (20), a second prism (30), a second lens unit (40), and a sensing element (50); incident parts of the first prism (10), the first lens unit (20), and the second prism (30) form a first light incident path; an exit part of the second prism (30), the second lens unit (40), and the sensing element (50) form a second light incident path; and the second prism (30) inverts a light propagation path, so that the first light incident path and the second light incident path are located on the same side of the second prism (30). By means of the inversion design of the second prism (30), the light propagation path is divided into the first light incident path and the second light incident path, and the zoom lenses (20, 40) are respectively provided on the first light incident path and the second light incident path, so that the problem that the size of the long-focus module (100) is too large due to the zoom requirement is solved.

Description

Telephoto modules, dual-camera modules and electronic equipment

technical field

The present application relates to the field of optics, in particular to telephoto modules, dual-camera modules and electronic equipment.

Background technique

With the rise of live broadcast and short video software in the Internet era, electronic devices have put forward higher requirements for their own camera modules, but limited by the space provided by electronic devices, camera modules need to be kept in the same size. Get a higher zoom ratio. However, for a general camera module, the higher the zoom ratio, the longer the focal length, and the larger the required size of the camera module.

SUMMARY OF THE INVENTION

The present application provides a telephoto module, which divides the light propagation path into a first incident light path and a second incident light path through the 180 inversion of the second prism. On the first incident light path and the second incident light path Setting the lenses separately overcomes the problem that the module is too large due to the need for zooming.

The present application provides a telephoto module, comprising a first prism, a first lens unit, a second prism, a second lens unit and a sensing element, the first prism, the first lens unit, the second prism The incident part forms the first incident light path, the second prism exit part, the second lens unit and the sensing element form the second incident light path, and the second prism reverses the propagation path of the light, so that all The first incident light path and the second incident light path are located on the same side of the second prism. In the embodiment, the first prism, the first lens unit and the incident portion of the second prism are arranged on the first incident light path, and the exit portion of the second prism, the second lens unit and the second prism are arranged on the second incident light path. The sensing element realizes light folding through the reversal function of the second prism, which increases the effective focal length of the telephoto module in a limited space.

In a specific embodiment, the incident portion includes a light incident surface and a first reflecting surface, the exit portion includes a light exit surface and a second reflecting surface, the first reflecting surface is perpendicular to the second reflecting surface, The light enters the second prism from the light incident surface, is reflected by the first reflecting surface and the second reflecting surface in turn, and finally exits from the light exit surface. When the first reflecting surface and the second reflecting surface in the embodiment are perpendicular to each other, the normals of the two are also perpendicular to each other, no matter the light enters the second prism from any angle, the incident light and the outgoing light for the second prism are The paths are reversed 180 degrees and are parallel to each other.

In a specific embodiment, the light incident surface of the second prism is perpendicular to the first light incident path, and the light exit surface of the second prism is perpendicular to the second light incident path. The light incident surface and the light exit surface are perpendicular to the first light incident path and the second light incident path, respectively. The advantage of this design is that when the light enters the light incident surface or exits along the light incident path, the included angle with the normal is zero or approximately Zero degrees, the incident angle and the exit angle are both zero degrees or approximately zero degrees, then the light will not be angularly deflected due to changes in the propagation medium.

In a specific embodiment, the second prism is a trapezoid body, two waist surfaces of the trapezoid body correspond to the first reflecting surface and the second reflecting surface, respectively, and the first reflecting surface is in the The projection on the bottom surface of the trapezoid body is the light incident surface, and the second reflection surface is on the light exit surface of the bottom surface. The second prism in the embodiment is a trapezoid body, and the bottom surface of the trapezoid body is divided into a light incident surface and a light exit surface. For the second prism, the part sandwiched between the light incident surface and the first reflection surface is the light incident part, and the light exits. The part sandwiched between the surface and the second reflecting surface is the light emitting part. The reversal of the light path is formed by the reflection of the two girdle surfaces of the trapezoid.

In one embodiment, a displacement device is included, and the displacement device can drive the first lens unit, the second prism and the second lens unit in the first light incident path shown and/or the second lens unit. The two incident light paths are moved to adjust the focal length of the camera module. The setting of the displacement device in the embodiment is that the first lens unit and the second prism move on the first incident light path, while the second prism and the second lens can move on the second light incident path, and through the three The movement on the first incident light path or the second incident light path can achieve different zoom magnifications, which enhances the shooting performance of the telephoto module.

In one embodiment, two displacement devices are further included, and the two displacement devices are respectively connected with the first lens unit and the second lens unit, and are used for the first lens unit in the first light incident path. and the movement of the second lens unit on the second light incident path. In the embodiment, the displacement device is used to realize the position change of the first lens unit and the second lens unit, and the first lens unit can realize the focus adjustment of the light on the first incident light path by moving on the first incident light path, The second lens unit can realize the focus adjustment of the light on the second incident light path by moving on the second incident light path. The combination of the two can realize the focus adjustment of the light on the entire path, and realize the zoom of the telephoto module. magnification adjustment.

In an embodiment, two displacement devices are further included, and the two displacement devices are respectively connected with the second prism and the second lens unit, and are used for the second prism in the first incident light path and the second lens unit. The movement on the second incident light path, and the movement of the second lens unit on the second incident light path. In the embodiment, it is the second prism and the second lens unit that can be moved, and the change of the position of the second prism will simultaneously change its distance from the first lens unit on the first incident light path and the distance from the first lens unit on the second incident light path. The distance of the second lens unit, for example, when the second prism moves in a direction away from the first lens unit, not only the distance between the second prism and the first lens unit on the first incident light path is increased, but also the distance between the second prism and the first lens unit is increased. The distance from the second lens unit on the second incident light path. This way of adjusting the zoom is more efficient than simply adjusting the positions of the first lens unit and the second lens unit.

In one embodiment, the extending direction of the first light incident path is a first direction, the direction in which the light enters the first prism is a second direction, and the first direction is perpendicular to the second direction . The function of the first prism is to reflect the incident light by 90 degrees. The advantage of this design is to achieve a periscope effect, which changes the layout and distribution of the telephoto module inside the product. Taking a mobile phone as an example, if there is no direction change of the first prism, the extension direction of the first incident light path coincides with the incident direction of the light, and the thickness of the mobile phone will restrict each component on the first incident light path, while the With the steering design of the first prism, the first incident light path can correspond to the width or length of the mobile phone, and the size restriction will be reduced.

In one embodiment, an anti-shake device is further included, and the anti-shake device drives the rotation of the first prism in the second direction and the third direction, and the first prism is located in the The axis of rotation in the third direction is the third axis, the axis of rotation of the first prism in the second direction is the second axis, the third axis is perpendicular to the second axis, and the third axis is perpendicular to the second axis. The central axes of the reflecting surfaces on the first prism are coincident. In the traditional telephoto module design, off-axis compensation is usually used to compensate for the jitter during the shooting process. This compensation method will cause the rotation center of the prism to not be on the central axis of the reflective surface, which will lead to the picture during the shooting process. Rotation occurs, affecting the stability of the shooting screen. The anti-shake device provided by the present application drives the rotation of the first prism in the second direction and the third direction, and at the same time makes the third axis corresponding to the rotation of the first prism in the third direction coincides with the central axis of the reflecting surface, so that the first prism rotates in the third direction The second axis corresponding to the rotation of the prism in the second direction intersects with the central axis perpendicularly, so that the first prism will pass the central axis of the reflecting surface when rotating in both directions, so that when the anti-shake compensation is performed on the first prism, the compensation The method is compensation on the central axis of the reflective surface, which can effectively avoid the problem of picture rotation that may be caused by off-axis compensation, which is beneficial to the stability of picture shooting.

In one embodiment, the light incident surface and the light exit surface of the first prism and the light incident surface and the light exit surface of the second prism are optical curved surfaces, and the optical curved surfaces are used for zooming and improving imaging quality. The first prism and the second prism are used as light redirection devices, mainly to adjust the light path. Usually, the light incident surface and the light output surface of the prism are flat, but for some embodiments, in order to obtain more optical effects, The embodiment adjusts the plane to an optically curved surface.

In one embodiment, an infrared cut-off film or an anti-reflection film is provided on the light incident surface and the light emitting surface of the first prism and on the light incident surface and the light emitting surface of the second prism. By designing an infrared cut-off film or an anti-reflection film on the light-incident surface and light-emitting surface, the filtering and infrared anti-reflection functions of the prism can be improved.

In a second aspect, the present application also provides a dual-camera module, comprising any of the telephoto modules in the above-mentioned embodiments and a wide-angle module, the wide-angle module being arranged on the sensing element away from the second side of the lens unit. The telephoto module in the embodiment changes the propagation route of the light into two light paths arranged in parallel through the second prism, and the wide-angle module is arranged on the side of the sensing element away from the second lens unit, that is, the wide-angle module is arranged on the side away from the second lens unit. Set on the second incident light path, this design not only realizes the dual-camera function of telephoto and wide-angle, but also has a compact structure and layout, and realizes the function of small size and high zoom ratio.

In a third aspect, the present application also provides an electronic device, including the dual-camera module in the above-mentioned embodiment. The electronic device with the above-mentioned dual-camera module not only satisfies the dual-camera function of telephoto and wide-angle, but also has a compact structure and a small size. Smaller than existing electronic devices with dual-camera capabilities.

The telephoto module provided by the present application divides the light propagation path into parallel setting of the first incident light path and the second incident light path through the reversal function of the second prism. The zoom lenses are respectively arranged on the path, which not only realizes the zoom function, but also shortens the design size of the telephoto module.

Description of drawings

1 is a schematic structural diagram of a telephoto module in an embodiment of the present application;

Fig. 2 is the light propagation route diagram of the telephoto module in Fig. 1;

Fig. 3 is the anti-shake schematic diagram of the first prism in an embodiment of the present application;

4 is a schematic structural diagram of a telephoto module in an embodiment of the prior art;

Fig. 5 is the light propagation route diagram of the telephoto module in Fig. 4;

6 is a schematic structural diagram of a telephoto module in the second embodiment;

7 is a schematic structural diagram of a telephoto module in a third embodiment;

FIG. 8 is a schematic structural diagram of a dual-camera module in an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

As shown in FIGS. 1 to 3 , the present application provides a telephoto module 100 . The telephoto module 100 includes a first prism 10 , a first lens unit 20 , a second prism 30 , a second lens unit 40 and a sensor Element 50, the light passes through the first prism 10 on the first incident light path AA, the first lens unit 20, the incident part of the second prism 30 and the exit part of the second prism 30 on the second incident light path BB, the second The lens unit 40, the sensing element 50, and the second prism 30 invert the propagation path of the light by 180 degrees, so that the second incident light path BB is parallel to the first incident light path AA. In the embodiment, the incident portion of the first prism 10, the first lens unit 20 and the second prism 30 is provided on the first incident light path AA, and the exit portion of the second prism 30 is provided on the second incident light path BB. , the second lens unit 40 and the sensing element 50, through the 180-degree reversal function of the second prism 30, the light propagates along two parallel light paths, realizing light folding, and increasing the telephoto module in a limited space. Effective focal length. The components used for zooming in the telephoto module 100 in the embodiment include a first lens unit 20 and a second lens unit 40, and the functions of the two are to realize zoom shooting of the telephoto module 100. The first lens mentioned here is The unit 20 and the second lens unit 40 refer to lens assemblies with zoom function, which may be individual lens lenses. In other embodiments, the first lens unit 20 may also be a lens group composed of multiple lens groups with zoom function. . At the same time, it should be noted that the second prism 30 has a 180-degree reversal function. In this embodiment, a prism is used. Specifically, other embodiments may also be other lens components with a light reversal function.

As shown in FIG. 1 , the first reflecting surface 31 and the second reflecting surface 32 of the second prism 30 in the embodiment are perpendicular to each other, and the light passes through the first reflecting surface 31 and the second reflecting surface 32 , and the propagation path is 180 degrees. reversal of . When the first reflection surface 31 and the second reflection surface 32 in the embodiment are perpendicular to each other, according to the reflection law of light, since the first reflection surface 31 is perpendicular to the second reflection surface 32, no matter the light enters the first reflection surface 31 from any angle For the second prism 30, for the second prism, the paths of the incident light and the outgoing light are reversed by 180 degrees and are parallel to each other.

In a specific embodiment, as shown in FIG. 1 , the light incident surface 331 of the second prism 30 is perpendicular to the first incident light path A-A, and the light exit surface 332 of the second prism is perpendicular to the second light incident path B-B. In the embodiment, the light incident surface 331 of the second prism 30 is perpendicular to the first light incident path AA, and the light exit surface 332 of the second prism is perpendicular to the second light incident path BB. The advantage is that when the light travels along the first light incident path AA When entering the light-incident surface 331, the angle between the light and the normal of the light-incident surface 331 is zero or approximately zero. Similarly, when the light enters the BB along the second light-incident path, the angle between the light and the normal of the light-emitting surface 332 is also zero or approximately zero. Approximate zero degrees, that is, the incident angle and the exit angle are both zero degrees or approximately zero degrees, then the light will not be angularly deflected due to changes in the propagation medium.

In a specific embodiment, as shown in FIG. 1 , the second prism 30 is a trapezoid body, and the two opposite waist surfaces of the trapezoid body correspond to the first reflection surface 31 and the second reflection surface 32 respectively, and the first reflection surface 31 is in the The projection on the bottom surface 33 of the trapezoid body is the light incident surface 331 , and the projection of the second reflecting surface 32 on the bottom surface 33 is the light exit surface 332 . The second prism 30 in the embodiment is a trapezoid, and the bottom surface 33 of the trapezoid is divided into a light incident surface 331 and a light exit surface 332. For the second prism 30, the light incident surface 331 and the first reflection surface 31 are sandwiched between the light incident surface 331 and the first reflection surface 31. The part is the light incident part, and the part sandwiched between the light exit surface 332 and the second reflection surface 32 is the light exit part. The reversal of the light path is formed by the reflection of the two girdle surfaces of the trapezoid.

As shown in FIG. 4 and FIG. 5 , it is a telephoto module design in the prior art. Like the telephoto module 100 in the application, it includes two zoom units: a first lens unit 20 ′ and a second lens unit 40', the light enters the sensing unit 50' through the first lens unit 20' and the second lens unit 40'. Comparing the light path diagrams in FIG. 2 and FIG. 5, it can be seen that the first lens unit 20 (the first lens unit 20') and the second lens unit 40 (the second lens unit 40') have the same zoom factor in the two schemes. In terms of. If you want to obtain the same zoom factor, as shown in FIG. 2 , the structural length of the entire telephoto module 100 is L1, that is, the distance from the light from point a representing the first prism 10 to point b representing the second prism 30 ; As shown in Figure 5, the structure length of the telephoto module in the prior art is L2, that is, the distance between the light rays from the point a' representing the entrance to the point d' representing the sensing unit 50', from Figure 2 and As can be clearly seen in FIG. 5 , due to the design of the second prism 30 in the embodiment of the application solution, the light path is bent and reversed by 180 degrees, which reduces the structural length of the entire telephoto module 100 .

In a specific embodiment, as shown in FIG. 1 , the telephoto module 100 further includes a displacement device 60 , and the displacement device 60 can drive the first lens unit 20 , the second prism 30 and the second lens unit 40 in the first The light path AA and/or the second incident light path BB is moved to adjust the focal length of the telephoto module 100 . In the embodiment, the first lens unit 20 and the second prism 30 are moved on the first incident light path AA by the setting of the displacement device 60, and the second prism 30 and the second lens 40 can be moved on the second light incident path BB at the same time. , through the movement of the three on the first incident light path AA or the second incident light path BB, different zoom magnifications can be achieved, which enhances the shooting performance of the telephoto module 100 . It should be noted that the displacement device 60 here can be a voice coil motor, and the voice coil motor has a permanent magnet steel and a coil conductor. The signal is converted into a displacement change. Specifically in this embodiment, when the first lens unit 20 and the second lens unit 40 in the telephoto module 100 need to be changed in displacement, the control unit in the voice coil motor will receive a current signal, and the current signal will This causes the coil conductor to generate a magnetic field, which interacts with the magnetic field of the permanent magnet steel to cause relative displacement, so that the voice coil motor can drive the first lens unit 20 to move on the first incident light path AA, and can also drive the second lens. The unit 40 moves on the second light incident path BB.

Specifically, as shown in FIG. 1 and FIG. 2 , the telephoto module 100 includes two displacement devices 60 , and the two displacement devices 60 are respectively connected with the first lens unit 20 and the second lens unit 40 for the first lens unit. The movement of 20 on the first incident light path AA and the movement of the second lens unit 40 on the second light incident path BB. In the embodiment, the displacement device 60 is used to realize the position change of the first lens unit 20 and the second lens unit 40, and the first lens unit 20 can realize the light on the first incident light path by moving on the first incident light path AA. For the focus adjustment on AA, the second lens unit 40 can realize the focus adjustment of the light on the second incident light path BB by moving on the second incident light path BB. The combination of the two can realize the focusing of the light on the entire path. Adjustment to realize the zoom magnification adjustment of the telephoto module 100 .

Specifically, as shown in FIG. 6 , the telephoto module 100 includes two displacement devices 60, and the two displacement devices 60 are respectively connected with the second prism 30 and the second lens unit 40, and are used for the second prism 30 to enter the first The movement on the light path AA and the second light incident path BB, and the movement of the second lens unit 40 on the second light incident path BB. In the embodiment, it is the second prism 30 and the second lens unit 40 that can be moved, and the positional change of the second prism 30 will simultaneously change the distance between the second prism 30 and the first lens unit 20 on the first incident light path AA and the second lens unit 20 on the second light incident path AA. The distance between the incident light path BB and the second lens unit 40, for example, when the second prism 30 moves in a direction away from the first lens unit 20, not only increases the distance between the second prism 30 and the second lens unit 40 on the first incident light path AA. The distance of a lens unit 20 also increases its distance from the second lens unit 40 on the second light incident path BB. This way of adjusting the zoom is more efficient than simply adjusting the positions of the first lens unit 20 and the second lens unit 40 .

As shown in FIG. 3 , in a specific embodiment, the extending direction of the first light incident path AA is the first direction Y, the direction of light incident on the first prism 10 is the second direction X, and the first direction Y is perpendicular to The second direction X. The function of the first prism 10 is to reflect the incident light by 90 degrees. The advantage of such a design is to achieve a periscope effect, which changes the layout and distribution of the telephoto module 100 inside the electronic device. As shown in FIG. 4, taking a mobile phone as an example, if there is no direction change of the first prism 10, the extension direction of the first incident light path AA coincides with the incident direction of the light, and the thickness of the mobile phone will affect the first incident light path AA. The size of each component on the mobile phone is limited, and through the 90-degree turning design of the first prism 10, the first incident light path AA can correspond to the width or length of the mobile phone, and the size limit is reduced.

In a specific embodiment, as shown in FIG. 3 , the first prism 10 includes an anti-shake device (not shown in the figure), and the anti-shake device drives the first prism 10 in the second direction X and the third direction Z Rotation, the axis of rotation of the first prism 10 in the third direction Z is the third axis M, the axis of rotation of the first prism 10 in the second direction X is the second axis N, and the third axis M is perpendicular to the second axis N The third axis M coincides with the central axis of the reflective surface 13 on the first prism 10 . In the traditional telephoto module design, the off-axis compensation method is usually used to compensate for the shaking during the shooting process. This compensation method will cause the rotation center of the prism to not be on the central axis of the reflective surface, which will cause the picture during the shooting process. Rotation occurs, affecting the stability of the shooting screen. The anti-shake device provided by the present application drives the rotation of the first prism 10 in the second direction X and the third direction Z; at the same time, rotates the first prism 10 in the third direction Z corresponding to the third axis M and its reflection surface The central axes of 13 are coincident, so that the second axis N corresponding to the rotation of the first prism 10 in the second direction X is perpendicular to the central axis of the reflective surface 13, so that the first prism 10 will pass the reflective surface 13 when it rotates in both directions. The central axis (the third axis M) of the reflective surface 13, so that when the anti-shake compensation is performed on the first prism 10, the compensation method is the compensation on the central axis (the third axis M) of the reflective surface 13, so that the distance from the reflective surface 13 can be effectively avoided. The axis compensation may cause the picture rotation problem, which is beneficial to the stability of the picture shooting.

In a specific embodiment, as shown in FIG. 7 , the light incident surface 11 and the light exit surface 12 of the first prism 10 and the light incident surface 331 and the light exit surface 332 of the second prism 30 are optical curved surfaces, and the optical curved surfaces are used for zooming and improve image quality. The first prism 10 and the second prism 30 are used as light redirection devices, mainly to adjust the light path. Usually, the light incident surface and the light exit surface of the prism are flat surfaces, but for some embodiments, in order to obtain more optical Effect, the embodiment adjusts the plane to an optical curved surface.

Specifically, the light incident surface 11 and the light exit surface 12 of the first prism 10 shown in FIG. 7 and the light incident surface 331 and the light exit surface 332 of the second prism 30 are spherical convex surfaces, when the light incident surface 11 of the first prism 10 When both the light-emitting surface 12 and the light-emitting surface 12 are spherical convex surfaces, the first prism 10 not only has a direction-changing function, but also has a focusing function similar to a convex lens, which helps to improve the zoom and imaging quality of the telephoto module. Specifically, taking the first prism 10 as an example, the light incident surface 11 and the light exit surface 12 are optically convex surfaces, then the first prism 10 at this time is similar to a convex lens, and then the light not only occurs when passing through the first prism 10 The path changes, and the effect of light convergence is also achieved, thereby improving the imaging quality of the telephoto module.

Specifically, in some specific embodiments, the light incident surface 11 and the light exit surface 12 of the first prism 10 and the light incident surface 331 and the light exit surface 332 of the second prism 30 are provided with an infrared cut-off film or an anti-reflection film. The cut-off film can prevent the transmission of light in the infrared band, block unnecessary heat, and avoid burns to the sensing unit 50. As an optical film layer structure, the anti-reflection film can reduce the reflection effect of light on the light-incident surface or the light-emitting surface, improving the The transmission effect of light improves the image quality.

Meanwhile, as shown in FIG. 8 , the present application also provides a dual-camera module 200 , the dual-camera module 200 includes a wide-angle module 150 and any telephoto module 100 and a wide-angle module 150 in the above embodiments It is arranged on the side of the sensing element 50 away from the second lens unit 40 . As shown in FIG. 2 and FIG. 8 , the telephoto module 100 in the embodiment changes the propagation path of the light into two optical paths arranged in parallel through the second prism 30 , and the wide-angle module 150 is arranged on the sensing element 50 away from the second light path. One side of the two-lens unit 40, that is, the wide-angle module 150 is disposed on the second incident light path BB. This design not only realizes the dual-camera function of telephoto and wide-angle, but also has a compact structure and layout, and realizes the function of small size and high zoom ratio. .

The present application also provides an electronic device including the above-mentioned dual-camera module. The electronic device with the above-mentioned dual-camera module not only satisfies the dual-camera function of telephoto and wide-angle, but also has a compact structure and design, and is smaller in size than the existing dual-camera module. functional electronic equipment.

The embodiments of the present application are described in detail above, and specific examples are used in this paper to illustrate the principles and implementations of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; at the same time, for Persons of ordinary skill in the art, based on the idea of the present application, will have changes in the specific implementation manner and application scope. In summary, the contents of this specification should not be construed as limitations on the present application.

Claims

A telephoto module is characterized in that it comprises a first prism, a first lens unit, a second prism, a second lens unit and a sensing element, the first prism, the first lens unit, the second prism The incident part of the prism forms a first incident light path, the second prism exit part, the second lens unit and the sensing element form a second incident light path, and the second prism reverses the propagation path of the light, so that the The first incident light path and the second light incident path are located on the same side of the second prism.
The telephoto module of claim 1, wherein the incident portion includes a light incident surface and a first reflection surface, the exit portion includes a light exit surface and a second reflection surface, and the first reflection surface is vertical On the second reflection surface, the light enters the second prism from the light incident surface, is reflected by the first reflection surface and the second reflection surface in sequence, and finally exits from the light exit surface.
The telephoto module of claim 2, wherein the light incident surface of the second prism is perpendicular to the first light incident path, and the light exit surface of the second prism is perpendicular to the second incident light path. light path.
The telephoto module according to claim 2, wherein the second prism is a trapezoid, and two opposite waist surfaces of the trapezoid correspond to the first reflection surface and the second reflection surface respectively , the projection area of the first reflection surface on the bottom surface of the trapezoid body is the light incident surface, and the projection area of the second reflection surface on the bottom surface of the trapezoid body is the light exit surface.
The telephoto module according to claim 2, further comprising a displacement device, the displacement device can drive the first lens unit, the second prism and the second lens unit The first incident light path and/or the second incident light path is moved to adjust the focal length of the module.
The telephoto module according to claim 5, wherein the number of the displacement devices is two, and the two displacement devices are respectively connected with the first lens unit and the second lens unit, using The movement of the first lens unit on the first light incident path and the movement of the second lens unit on the second light incident path.
The telephoto module according to claim 5, wherein the number of the displacement devices is two, and the two displacement devices are respectively connected with the second prism and the second lens unit, and are used for The movement of the second prism on the first light incident path and the second light incident path, and the movement of the second lens unit on the second light incident path.
The telephoto module according to claim 1, wherein the extending direction of the first incident light path is a first direction, the direction in which the light enters the first prism is a second direction, and the The first direction is perpendicular to the second direction.
The telephoto module according to claim 8, further comprising an anti-shake device, the anti-shake device drives the rotation of the first prism in the second and third directions, the first The axis of rotation of a prism in the third direction is the third axis, the axis of rotation of the first prism in the second direction is the second axis, the third axis intersects the second axis perpendicularly, and the The third axis coincides with the central axis of the reflective surface on the first prism.
The telephoto module according to claim 1, wherein the light incident surface and the light emitting surface of the first prism and the light incident surface and the light emitting surface of the second prism are optical curved surfaces, and the optical curved surfaces are composed of optical curved surfaces. for zooming and improving image quality.
The telephoto module according to claim 10, wherein an infrared cut-off film or an antireflection film is provided on the light incident surface and the light emitting surface of the first prism and on the light incident surface and the light emitting surface of the second prism. membrane.
A dual-camera module, characterized in that it includes a wide-angle module and a telephoto module as claimed in any one of claims 1 to 8, wherein the wide-angle module is arranged on the sensing element away from the One side of the second lens unit.
An electronic device, comprising the dual-camera module as claimed in claim 12 .