CN112532815B

CN112532815B - Periscopic camera module and electronic equipment

Info

Publication number: CN112532815B
Application number: CN201910879871.8A
Authority: CN
Inventors: 赵波杰; 姚立锋; 袁栋立; 俞丝丝
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2022-04-26
Anticipated expiration: 2039-09-18
Also published as: CN112532815A

Abstract

The invention relates to a periscopic camera module which comprises a first reflecting element arranged on a first base, an optical lens arranged on a second substrate, a second reflecting element arranged on a third substrate and a photosensitive chip arranged on a fourth substrate. The first reflecting element is used for reflecting the incident light to make the incident light longitudinally turn. The optical lens receives the longitudinally-bent reflected light and outputs an imageable light beam. The second reflecting element is a second prism adapted to laterally divert the imageable light beam at least once with its reflecting surface on a side of the second prism. The photosensitive chip is suitable for receiving the imageable light beam after being transversely turned by the second reflecting element. The application also provides corresponding electronic equipment. The length of the periscopic camera module can be reduced; and is suitable for large-scale mass production, and is favorable for improving the production efficiency and the production yield.

Description

Periscopic camera module and electronic equipment

Technical Field

The invention relates to the technical field of camera modules, in particular to a periscopic camera module solution and corresponding electronic equipment.

Background

With the popularization of mobile electronic devices, technologies related to camera modules applied to mobile electronic devices for helping users to obtain images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely applied to various fields such as medical treatment, security, industrial production, and the like. In order to meet the increasingly wide market demands, a high-pixel, large-chip, small-size and large-aperture camera module is an irreversible development trend of the existing camera module.

Currently, the demand of people for the camera function of portable electronic devices (such as tablet computers, smart phones, etc.) is still increasing rapidly, and the camera module configured for the electronic devices gradually realizes a plurality of functions such as background blurring, night shooting, double-camera zooming, and the like. In which, due to the application of a periscopic camera module, the capability of the double-shot zoom is gradually increasing, for example, the optical zoom capability thereof has been improved to 3 times zoom or even 5 times zoom through 2 times zoom. The periscopic camera module can greatly change the cognition of people on the photographing capability of the portable electronic equipment (such as a smart phone), and has a wide market prospect.

However, the existing periscopic camera module has the problems of large volume, complex structure and the like. Inside a portable electronic device (e.g., a smartphone), it may be called "cun jin". If the periscopic camera module is according to great space, then the size of other accessories such as battery, mainboard will be sacrificed, is unfavorable for promoting the comprehensive value of cell-phone. Therefore, it is expected that the periscopic camera module has a smaller size and a more compact structure.

On the other hand, the periscopic camera module has the characteristic of mainly performing telephoto shooting, i.e., clearly shooting a distant picture. This results in that a periscopic camera module often needs to be equipped with an optical lens having a larger focal length. Under the limitation of optical theory, the optical path constructed by the optical lens based on large focal length needs to have enough length, which becomes one of the difficulties in reducing the size of the periscopic camera module of the mobile phone.

Moreover, the current consumer electronics market is in great demand and product upgrades are extremely fast. Therefore, it is also desirable to design a camera module for a portable electronic device (e.g., a smart phone) for mass production, which is helpful to improve production efficiency and production yield. The periscopic camera module (especially the long-focus periscopic camera module) has multiple constituent modules and complex structure, has higher requirements on assembly and higher assembly difficulty, so that when the periscopic camera module is designed, whether the structure is convenient for assembly or not is also considered while required functions are realized and imaging quality requirements of the periscopic camera module are met, and the production efficiency and the production yield are improved in large-scale mass production.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a solution for reducing the occupied volume of a periscopic camera module.

In order to solve the above technical problem, the present invention provides a periscopic camera module, which comprises: the first reflecting element is used for reflecting incident light to enable the incident light to be longitudinally turned, and the first reflecting element is arranged on the first base; the optical lens is used for receiving the light reflected by the first reflecting element and outputting an imageable light beam to an image space, and the optical lens is arranged on the second substrate; a second reflecting element comprising at least one second reflecting surface, the at least one second reflecting surface being adapted to laterally turn the imageable light beam at least once, the second reflecting element being a second prism and the second reflecting surface being located at a side of the second prism, the second prism being mounted on a third substrate, wherein surfaces of the second substrate and the third substrate are perpendicular to an incident direction of the incident light; and the photosensitive chip is suitable for receiving the imageable light beam transversely turned by the second reflecting element, the photosensitive chip is adhered to a fourth substrate, and the surface of the fourth substrate is parallel to the incident direction of the incident light.

The bottom surface of the second prism is abutted against the third substrate, and the second prism and the third substrate are fixed together in a sticking or embedding way.

The second prism is a triangular prism, all optical surfaces of the second reflecting element are located on the side faces of the triangular prism, the optical surfaces comprise a reflecting surface, an incident surface and an emergent surface, and the reflecting surface comprises the second reflecting surface.

The transverse section of the second prism is a parallelogram, two parallel side surfaces of the second prism form two second reflecting surfaces, all optical surfaces of the second reflecting element are positioned on the side surfaces of the second prism, the optical surfaces comprise reflecting surfaces, incident surfaces and emergent surfaces, and the reflecting surfaces comprise the second reflecting surfaces.

The second reflecting element comprises a plurality of groups of second reflecting surfaces, each group comprises two second reflecting surfaces which are parallel to each other, any two adjacent groups of second reflecting surfaces are arranged in a V shape or an inverted V shape, and the transverse section shape of the second prism is formed by splicing a plurality of V shapes or inverted V shapes.

The second reflecting element comprises at least two second reflecting surfaces, and the second reflecting surfaces are 45-degree reflecting surfaces; the first reflecting element is provided with a first reflecting surface, and the first reflecting surface is a 45-degree reflecting surface.

The periscopic camera module further comprises a first shell, and the first shell is mounted on the first base and covers the first reflecting element.

The periscopic camera module further comprises a second shell, and the second shell is mounted on the second substrate and covers the optical lens.

The periscopic camera module further comprises a third shell, and the third shell is mounted on a third substrate and covers the second reflecting element.

The periscopic camera module further comprises a cylindrical support, the cylindrical support is provided with an axis, a first opening end and a second opening end, the axis is perpendicular to the surface of the fourth substrate, the fourth substrate is mounted at the first opening end, and the second opening end is arranged at a position right facing the emergent face of the second reflecting element.

Wherein the first open end and the second open end each have a rectangular profile.

The emergent surface and the second opening end of the second prism are provided with first plug-in structures which are mutually matched, and the second prism is embedded with the cylindrical support through the first plug-in structures.

And the joint of the first inserting structure is provided with a rubber material so as to reinforce the embedding of the second prism and the cylindrical support.

Wherein the second substrate and the third substrate are a common same substrate.

The bottom surfaces of the first base, the second base plate, the third base plate and the cylindrical support are all mounted on the same reinforcing plate.

The first reflecting element is a first prism, the first prism is a triangular prism, the inclined surface of the triangular prism is a reflecting surface, and two mutually vertical side surfaces of the triangular prism are respectively used as an incident surface and an emergent surface of the first reflecting element.

The first base comprises a base body and a first wedge-shaped supporting body arranged in the base body, and the inclined surface of the first prism is arranged and leaned against the inclined surface of the first wedge-shaped supporting body.

Wherein the first base further comprises a drive module adapted to drive the first wedge support to move relative to the base body.

Wherein the optical lens comprises a lens barrel and at least three lenses mounted in the lens barrel; the surface of the second substrate is provided with a positioning column, and the lens barrel is arranged on the second substrate through the positioning column.

The outer contour of the lens barrel is rectangular; the rear end of the lens cone and the incident surface of the second prism are provided with second inserting structures which are mutually matched, and the second prism is embedded with the lens cone through the second inserting structures.

And the joint of the second inserting structure is provided with a rubber material so as to reinforce the embedding of the second prism and the lens cone.

The third substrate comprises a substrate body and a second wedge-shaped supporting body, the inclined surface of the second prism is installed and supported against the inclined surface of the second wedge-shaped supporting body, and the second wedge-shaped supporting body can move relative to the base body under the driving of the driving module.

Wherein the optical lens has an effective focal length of 15mm or more or has a field angle of 25 degrees or less.

Wherein the optical lens has an effective focal length of 18mm or more or has a field angle of 20 degrees or less.

Wherein the optical lens has an effective focal length of 25mm or more or has a field angle of 15 degrees or less.

According to another aspect of the present application, there is also provided an electronic device, including: in any of the periscopic camera modules described above, an incident direction of incident light from the first reflective element is aligned with a thickness direction of the electronic device.

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

1. the application can reduce the volume of the periscopic camera module (especially can reduce the length of the periscopic camera module), and the structure of the periscopic camera module is more compact.

2. The application can better adapt to the optical lens with larger focal length.

3. The periscopic camera module is suitable for large-scale mass production, and is favorable for promoting the promotion of production efficiency and production yield.

4. The utility model provides a module of making a video recording of periscopic type can reduce because of the loss that the light beam passed through different media and leads to ensure that sensitization chip has sufficient received light volume, and then promote the formation of image quality.

Drawings

Fig. 1 is a schematic perspective view illustrating an optical path and optical elements of a periscopic camera module according to an embodiment of the present application;

FIG. 2 is a schematic diagram showing the principle of the optical path of a periscopic camera module according to a comparative example;

FIG. 3 shows a schematic internal light path diagram of a second reflective element 30;

FIG. 4 is a perspective view of the optical path and optical components of a periscopic camera module according to another embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the internal optical path of a prism having an inverted "V" shaped transverse cross-section in another embodiment of the present application;

FIG. 6 is a perspective exploded view of a periscopic camera module according to an embodiment of the present disclosure;

fig. 7 is a perspective exploded view of a periscopic camera module according to another embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view illustrating a connection relationship between the optical lens 20 and the second substrate 120 in another embodiment of the present application;

fig. 9 is a perspective exploded view of a periscopic camera module according to another embodiment of the present disclosure;

FIG. 10 is a perspective exploded view of a periscopic camera module according to yet another embodiment of the present application;

FIG. 11 is a schematic view showing the connection between the second reflecting element 30 and the cylindrical supporter 150 in one embodiment of the present application;

fig. 12 is a schematic diagram illustrating a connection relationship between the second reflecting element 30 and the optical lens 20 in an embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Fig. 1 is a perspective view illustrating an optical path and optical elements of a periscopic camera module according to an embodiment of the present application. Referring to fig. 1, in the present embodiment, the periscopic imaging module includes a first reflective element 10, an optical lens 20, a second reflective element 30, and a photosensitive chip 40, which are sequentially arranged along an optical path. The first reflective element 10 is used to reflect the incident light to make the incident light turn 90 degrees longitudinally (note that, in this embodiment, the turning angle allows a certain tolerance, that is, if the turning angle of the light beam is within the tolerance range, it can be regarded as the turning 90 degrees). The optical lens 20 is configured to receive the light reflected by the first reflective element 10 and output an imageable light beam to an image side. The second reflective element 30 comprises two reflective surfaces adapted to laterally divert the imageable light beam twice. The photosensitive chip 40 is adapted to receive the imageable light beam after being transversely turned by the second reflective element 30. Note that, in order to more clearly show the optical path, the module case, the actuator, the bracket, the IR filter, the connection structure between the optical elements, the circuit board assembly, and the like are omitted from fig. 1, and it should be understood that these omitted structures from fig. 1 may be a part of the periscopic camera module. In this embodiment, the longitudinal direction refers to the incident direction of the incident light of the first reflective element, that is, the incident direction of the incident light of the entire periscopic imaging module, and the transverse direction refers to the direction perpendicular to the longitudinal direction.

The imaging optical path of the periscopic camera module of the present embodiment will be described in more detail below.

First, the incident light is reflected by the first reflecting surface of the first reflecting element 10, and the longitudinal direction is turned by 90 degrees to reach the optical lens. The optical lens 20 may include at least three lenses therein. Then, the light beam reaches the second reflective element 30 through the optical lens 20 and is reflected by the first second reflective surface, the light beam is laterally turned by about 90 degrees to reach the other second reflective surface of the second reflective element 30, and then the light beam is laterally turned by about 90 degrees to finally reach the photosensitive chip 40. The first reflective element 10 and the second reflective element 30 in this embodiment may both be prisms, in other embodiments, the first reflective element 10 and the second reflective element 30 may both be mirrors, or the first reflective element 10 and the second reflective element 30 may be a combination of mirrors and prisms. The reflecting surface of the prism can be realized based on the total reflection principle, and the reflecting surface of the reflector can be realized based on the mirror reflection principle. In this embodiment, the first reflective surface and the second reflective surface may be 45-degree reflective surfaces. It is to be noted that the arrangement angle of the first and second reflecting surfaces is not required to be absolutely equal to 45 degrees in consideration of manufacturing and assembly tolerances, and may be regarded as a 45-degree reflecting surface as long as the angle is within the tolerance range. More specifically, a 45 degree reflective surface may be understood as a reflective surface that makes an angle of about 45 degrees with the incident light. In this application, the deviation value is within 5 degrees, and can be regarded as normal tolerance. For example, when the included angle between the two is 40-50 degrees, the two can be regarded as forming an angle of 45 degrees; the included angle between the two is within the range of +/-5 degrees, and the two can be regarded as parallel; when the included angle between the two is 85-95 degrees, the two can be regarded as perpendicular. Further, in the present embodiment, the first reflecting element 10 is a triangular prism, an inclined surface of the triangular prism is a first reflecting surface 11, and two mutually perpendicular side surfaces of the triangular prism are respectively used as an incident surface 12 and an exit surface 13 of the first reflecting element.

The periscopic camera module of the present embodiment is a long-focus periscopic module. The tele periscope module can have an effective focal length of 15mm or more, or it can have a field angle of 25 degrees or less. Generally, a longer focal length necessitates a longer back focal length (distance from the last lens surface of the lens to the photo-sensor chip), because the photo-sensor chip will only image sharp near the focal length. If the conventional periscopic module design is adopted (three of the prism, the lens and the photosensitive chip are in a straight line), the total length of the periscopic camera module with the effective focal length being more than or equal to 15mm will be very large (for example, more than 20mm, even more than 25 mm), which will occupy a large internal space of the mobile phone, which is not desirable. Therefore, in order to reduce the overall length of the telephoto module, a reflective element is disposed behind the lens to turn the light again. Further, fig. 3 shows a schematic view of the internal light path of a second reflective element 30. As shown in fig. 1 and fig. 3, in the present embodiment, a second reflective element 30 is disposed behind the optical lens, the second reflective element 30 is a prism, the prism is disposed with two second reflective surfaces 31 and 32 (which can be implemented based on the total reflection principle), and the two second

reflective surfaces

31 and 32 are substantially parallel, light enters from an entrance surface 33, and undergoes a transverse turning a of about 90 degrees in the second reflective element 30, and then undergoes a transverse turning B of about 90 degrees, so as to recover the direction of the light beam entering the second reflective element 30, and finally exits from an exit surface 34. This design allows the overall length of the periscope arrangement to be reduced to approximately the length of the transverse bend a. Further, in this embodiment, the incident direction of the incident light entering the first reflective element 10 is parallel to the photosensitive surface of the photosensitive chip 40. The incident direction of the incident light of the first reflective element 10 is the incident direction of the incident light of the entire periscopic camera module, i.e., the thickness direction of the electronic device (e.g., a smartphone) on which the periscopic camera module is mounted. In this embodiment, the surface of the photosensitive chip 40 is parallel to the thickness direction of the electronic device, so that a circuit board, a color filter, a related bracket and the like attached to the photosensitive chip can be prevented from occupying the space in the thickness direction of the electronic device, and the thickness of the electronic device can be controlled or reduced.

More specifically, fig. 2 shows a schematic diagram of the optical path principle of the periscopic camera module of the comparative example. This comparative example employs a typical structure of a periscopic camera module currently used for mobile phones. Referring to fig. 2, in this comparative example, the optical elements are arranged substantially linearly. Namely, the incident light enters the first reflecting element, is longitudinally turned by 90 degrees, then passes through the optical lens and is incident to the photosensitive chip along a straight line. However, for a high power telephoto module (sometimes also referred to as a telephoto module), it often needs to be equipped with an optical lens having a larger focal length, and for clear imaging, the photosensitive chip needs to be disposed at a position near the focal point, which leads to a periscopic camera module adopting a conventional structure, where the photosensitive chip has to be disposed at a position far away from the rear end face of the lens, so that the length of the periscopic camera module is longer, which is not beneficial to reducing the internal space of the electronic device occupied by the camera module. And the embodiment that figure 1 of this application shows sets up the second reflection element through the back focal zone section at the module of making a video recording, but the light beam that can form images that will pass through optical lens is folding to make sensitization chip can arrange the position department that is close to optical lens more, and then make a video recording the compact structure of module, help reduces the shared volume of the module of making a video recording.

Further, still referring to fig. 1, in an embodiment of the present application, the second reflecting element 30 is a prism, and a lateral cross-section of the prism is a parallelogram, two mutually parallel sides of the prism constituting two of the second reflecting

surfaces

31, 32. Since the refractive index n of the prism is usually greater than 1, assuming that light has traveled a distance of length L in the second reflecting element 30, it can be regarded as light having traveled a path of length nL in an optical angle (i.e., an optical path of light in the prism)), so disposing the prism behind the optical lens as the second reflecting element 30 can reduce the overall optical path by the length (nL-L). From this angle, also can make photosensitive chip set up in the position department that is closer to optical lens rear end face, and then make the compact structure of making a video recording the module, help reduces the shared volume of the module of making a video recording.

Further, still referring to fig. 1, in one embodiment of the present application, a prism having a parallelogram shape in transverse section is employed as the second reflecting element 30, and both end surfaces of the prism constitute an incident surface 33 and an exit surface 34 of the second reflecting element 30, respectively. This design helps to reduce losses due to the beam traversing different media. Specifically, in the prior art, a triangular prism or a mirror is generally used to realize the reflecting surface. Wherein the shape of the triangular prism can be referred to the first reflective element 10 in fig. 1. The inclined surface of the triangular prism is usually a reflecting surface, and two mutually perpendicular side surfaces can be respectively used as an incident surface and an emergent surface. If it is desired to have the light rays turn at least twice behind the optical lens, it is conventional practice to provide two triple prisms behind the lens. In the present embodiment, a prism having a parallelogram-shaped transverse cross section is used as the second reflecting element 30, and the volume thereof is smaller than the volume of two triangular prisms. Further, in the case of the arrangement in which two second reflecting surfaces are implemented by two triangular prisms, the light path will be prism-air-prism, so that light is inevitably lost at the prism-air interface, which may be unacceptable for a tele periscope module in which the amount of incoming light is inherently insufficient. In the present embodiment, the two second reflecting

surfaces

31 and 32 are integrated on a single reflecting element, i.e. a prism having a parallelogram-shaped transverse cross section. Thus, the number of second reflecting elements is reduced, the assembly difficulty is reduced, and the volume increase caused by a plurality of reflecting elements is avoided. Furthermore, compared with the scheme of two triangular prisms, the embodiment can reduce the redundant incident surface and the redundant emergent surface, and the light is transmitted in the same prism, so that the loss of the light in the prism-air-prism process can be reduced, the photosensitive chip can be ensured to receive enough light entering amount, and the imaging quality is improved. Of course, the design of fig. 1 is not exclusive, and in other embodiments, the second reflective element 30 may be replaced by two separate mirrors. The light is reflected by the mirror surface at the moment, the process of the light after being emitted from the lens is mirror surface-air-mirror surface-air, and the design can reduce the loss of the light to a certain extent because the light does not need to pass through a thicker prism.

Further, fig. 6 is a perspective exploded view of the periscopic camera module according to an embodiment of the present disclosure. Fig. 1 is a schematic perspective view of an optical path and an optical element of the periscopic camera module according to this embodiment. Fig. 6 adds a series of structural elements to the components shown in fig. 1. Referring to fig. 6, in the present embodiment, the periscopic imaging module includes a first reflective element 10, an optical lens 20, a second reflective element 30, and a photosensitive chip 40, which are sequentially arranged along an optical path. In this embodiment, the first reflective element 10 is mounted on the first base 110, the optical lens 20 is mounted on the second substrate 120, the second reflective element 30 is a second prism, the second reflective surface is located on the side of the second prism, and the second prism is mounted on the third substrate 130, wherein the surfaces of the second substrate 120 and the third substrate 130 are perpendicular to the incident direction of the incident light (the incident light incident on the first reflective element 10, which is the first optical element of the entire periscopic camera module). The photosensitive chip 40 is attached to the fourth substrate 140, and a surface of the fourth substrate 140 is parallel to an incident direction of the incident light (which is not described above). In this embodiment, two parallel side surfaces of the second prism form two second reflecting surfaces, and all optical surfaces of the second reflecting element are located on the side surfaces of the second prism, where the optical surfaces include a reflecting surface (the reflecting surface includes the second reflecting surface), an incident surface, and an exit surface. The bottom surface of the second prism is a plane in a parallelogram shape, and the plane can be used as a stable and reliable bearing surface. The bottom surface of the second prism may bear against and be bonded to a surface of the second substrate. In this embodiment, because the second prism having a parallelogram-shaped transverse cross section is adopted, the second prism can provide two reflecting surfaces at the same time, thereby avoiding the excessive number of optical elements and avoiding the complicated assembly process while realizing the folding of the optical path. In addition, the bottom surface of the second prism can provide a stable and reliable bearing surface, so the camera module of the embodiment also has the advantage of high reliability and is easy to assemble. Therefore, the structure of the camera module of the embodiment is beneficial to improving the production yield and the production efficiency. Note that the second prism may be mounted to the third substrate 130 in other ways besides adhesion. For example, in another embodiment, the second prism can be engaged with the third substrate 130, and at this time, the bottom surface of the second prism can still be used as a bearing surface, so as to improve the reliability of the assembly structure and reduce the assembly difficulty. For another example, in another embodiment, the second prism may be further assembled with the third substrate through an intermediate structure, and the intermediate structure may be used for driving the second prism, thereby implementing an optical anti-shake function.

Further, still referring to fig. 6, in an embodiment of the present application, the periscopic camera module may further include a first housing 210, a second housing 220, a third housing 230, and a cylindrical bracket 150. The first housing 210 is mounted to the first base 110 and covers the first reflective element 10. The top surface of the first housing 210 may have a light window 211 for incidence of incident light. The second housing 220 is mounted on the second substrate 120 and covers the optical lens 20. The third housing 230 is mounted on the third substrate 130 and covers the second reflective element 30. The shape of the third housing 230 may be adapted to the shape of the second reflecting element 30, for example, when the second reflecting element 30 is a prism having a parallelogram in transverse section, the transverse section of the third housing 230 may also be a parallelogram. Further, in this embodiment, the cylindrical holder 150 has an axis perpendicular to the surface of the fourth substrate 140, a first open end to which the fourth substrate 140 (the photosensitive chip may be attached to the surface of the fourth substrate) is mounted, and a second open end disposed at a position facing the exit surface of the second reflective element 30.

Further, fig. 4 is a schematic perspective view illustrating an optical path and optical elements of a periscopic camera module according to another embodiment of the present application. Referring to fig. 4, in the present embodiment, the second reflecting element 30 is a shaped prism having two sets of second reflecting surfaces, wherein each set has two second reflecting surfaces and the two second reflecting surfaces are parallel to each other. And the two groups of second reflecting surfaces are arranged in an inverted V shape. The second reflecting surfaces are both constituted by the side surfaces of the prism, and both end surfaces of the prism constitute the incident surface 33 and the exit surface 34 of the second reflecting element 30, respectively. More specifically, with reference to fig. 4, two second

reflective elements

31, 32 constitute a first group, and the other two second

reflective elements

35, 36 constitute a second group, the first group and the second group together constituting an inverted "V" shape. Further, in the present embodiment, the prism constituting the second reflecting element 30 has an inverted "V" shape in lateral cross section. Fig. 5 shows a schematic internal light path diagram of a prism with an inverted "V" shaped lateral cross-section in another embodiment of the present application. Referring to fig. 4 and 5, in the present embodiment, light passes through and is reflected by the reflection surface 11 on the first reflection element 10, and is turned 90 degrees to reach the optical lens 20 (the interior thereof includes at least three lenses), then passes through the optical lens 20 to reach the second reflection element 30 and is reflected by the second reflection surface 31, and light is turned 90 degrees laterally to reach the second reflection surface 32, then turned 90 degrees laterally to reach the third second reflection surface 35, then turned 90 degrees to reach the fourth second reflection surface 36, and finally turned 90 degrees laterally to reach the photo sensor chip. The first reflective element 10 and the second reflective element 30 in this embodiment are both prisms. It is to be understood that in other embodiments of the present application, the first reflective element 10 and the second reflective element 30 may be both mirrors, or a combination of mirrors and prisms. Further, in this embodiment, the incident direction of the incident light entering the first reflective element 10 is parallel to the photosensitive surface of the photosensitive chip 40.

Further, referring to FIG. 5, after passing through the optical lens, the light becomes an imageable light beam that, upon incidence on the second reflective element 30, undergoes four transverse turns A, B, C, D, where the lengths of turns A and C contribute to reducing the overall length of the tele periscope module, i.e., the length by which the overall length of the tele periscope module can be reduced is close to the sum of the lengths of turns A and C. Therefore, the scheme of the embodiment can remarkably shorten the total length of the periscope module, thereby enabling the module structure to be compact. Moreover, in the present embodiment, the four second

reflective surfaces

31, 32, 35, and 36 are integrated on the same second reflective element 30, so that the number of reflective elements is reduced, the assembly difficulty is reduced, and the increase in volume caused by a plurality of reflective elements is avoided. Furthermore, the scheme of the embodiment can also reduce redundant incident surfaces and emergent surfaces, and further reduce the loss of light rays in the prism-air-prism process.

Further, still referring to fig. 4, in one embodiment of the present application, the second reflective element may be axisymmetric in shape. The optical paths of the two transverse turns A, C that the light experiences in the second reflecting element 30 are as equal as possible, which makes it possible for the light exiting from the second reflecting element 30 to coincide as much as possible with the light entering the second reflecting element, so that the center of the exit surface 13 of the first reflecting element 10, the center of the optical lens 20, the center of the entrance surface 33 of the second reflecting element 30, the center of the exit surface 34 of the second reflecting element 30, and the center of the imaging surface of the photo-sensing chip 40 are kept on the same straight line as much as possible, i.e., the concentricity of all the components is increased. By increasing the concentricity of all the components, it may help to improve the imaging quality. Of course, in other embodiments of the present application, the centers of the above elements are not required to be on the same straight line, which can reduce the requirement of assembly precision, and this can be applied to a telephoto imaging module with low requirement on imaging quality.

Further, still referring to fig. 4, the tele periscope module with the inverted "V" shaped prism provided by the present embodiment may have an effective focal length of 18mm or more, or it may have a field angle of 20 degrees or less. Preferably, the tele periscope arrangement may have an effective focal length of 25mm or more, or it may have a field angle of 15 degrees or less. Note that, by comparison, for a typical conventional periscopic camera module based on a linear design (as shown in fig. 3), the total length of the periscopic camera module with an effective focal length of 18mm or more will be very large (e.g., 25mm or more, or even 30mm or more). In the arrangement shown in fig. 4, the overall length of the periscope camera module can be significantly reduced.

Further, a series of modified embodiments can also be derived based on the design of the second reflective element 30 of fig. 4. In the embodiment of fig. 4, the profiled prism as second reflecting element 30 has two sets of four second reflecting surfaces, while in other variant embodiments the profiled prism as second reflecting element 30 may have more sets of second reflecting surfaces. These second reflecting surfaces may be arranged cyclically with the two sets of reflecting surfaces shown in fig. 4 as basic units. That is, the transverse cross section of the special-shaped prism can be a shape (such as a W shape or an inverted W shape) formed by splicing a plurality of V shapes or inverted V shapes. In other words, in a modified embodiment, the second reflective element 30 may include a plurality of sets of the second reflective surfaces, wherein each set has two second reflective surfaces which are parallel to each other, and any two adjacent sets of the second reflective surfaces are arranged in a "V" shape or an inverted "V" shape. The second reflecting element is a single prism, the side surface of the prism forms the second reflecting surface, and two end surfaces of the prism respectively form an incident surface and an emergent surface of the second reflecting element. The transverse section of the prism is in a V shape or an inverted V shape, or is in a shape formed by splicing a plurality of V shapes and/or a plurality of inverted V shapes.

Further, in an embodiment of the present application, the periscopic camera module may add a series of structural members for assembly on the basis of fig. 4. These structural members may be similar to those shown in fig. 6. That is, in the present embodiment, the periscopic imaging module may further include a first base, a second base plate, a third base plate, a fourth base plate, a first housing, a second housing, a third housing, and a cylindrical holder. The shapes of the third substrate and the third housing may be adapted to the shape of the special-shaped prism in this embodiment, and the shapes and the position relationships of the other structural members refer to fig. 6 and the corresponding text descriptions in the foregoing, which are not repeated herein.

It should be noted that in the foregoing embodiments, the second reflective elements 30 each have a prism having two or more second reflective surfaces, but the second reflective elements 30 of the present application are not limited thereto. For example, in another embodiment, the second reflective element 30 may be a triangular prism. Fig. 7 is a perspective exploded view of a periscopic camera module according to another embodiment of the present disclosure. Referring to fig. 7, in the present embodiment, the second reflecting element 30 is a triangular prism having only one second reflecting surface. Specifically, the triangular prism has an entrance face, an exit face and a second reflecting face, wherein the second reflecting face is an inclined face of the triangular prism. In this embodiment, all optical surfaces of the second reflective element 30 are located at the sides of the triangular prism (where the optical surfaces include a reflective surface, an entrance surface, and an exit surface). In this embodiment, the light path is only transversely turned once in the second reflective element 30, but still can be folded to a certain extent, thereby reducing the length of the camera module. In addition, in the embodiment, the shape of the second reflective element 30 is simple, and the process is mature, which is beneficial to improving the production efficiency and the yield. Moreover, compared with other complex shapes, the triple prism is easier to process a plug-in structure on the incident surface and/or the emergent surface, so that the assembly efficiency is further improved, and the structural stability and the reliability of the camera module are improved. The prism is also advantageous in combination with a driver to achieve an optical anti-shake function.

Further, still referring to fig. 7, in an embodiment of the present application, the first reflecting element 10 is a first prism, the first prism is a triangular prism, an inclined surface of the triangular prism is a reflecting surface, and two mutually perpendicular side surfaces of the triangular prism are respectively used as an incident surface and an exit surface of the first reflecting element 10. The first base 110 includes a base body 111 and a first wedge-shaped support 112 installed in the base body 111, and the inclined surface of the first prism is installed and supported against the inclined surface of the first wedge-shaped support 112. The first base 110 may further comprise a drive module adapted to drive the first wedge-shaped support to move relative to the base body. The driving module may include a first driver and a second driver, and driving directions of the first driver and the second driver may be orthogonal. This provides more freedom of movement for the first reflective element, thereby better achieving optical anti-shake and other functions.

Further, still referring to fig. 7, in one embodiment of the present application, the optical lens 20 includes a lens barrel and at least three lenses mounted within the lens barrel. The surface of the second substrate 120 has a positioning column, the bottom of the lens barrel may have a corresponding positioning hole, and the lens barrel is mounted on the second substrate 120 through the engagement between the positioning hole and the positioning column. Further, the engagement between the second substrate 120 and the lens barrel can be reinforced by glue.

Further, fig. 8 is a schematic cross-sectional view illustrating a connection relationship between the optical lens 20 and the second substrate 120 in another embodiment of the present application. Referring to fig. 8, in the present embodiment, an optical lens 20 includes a lens barrel 21 and at least three lenses 22 (only one of which is shown because of a sectional view) mounted therein. The surface of the second substrate 120 has a positioning hole 121, and the lens barrel 21 is mounted on the second substrate 120 through the engagement of the positioning post 23 and the positioning hole 121. In this embodiment, the lens barrel 21 may be first installed in a positioning structure 24, the bottom of the positioning structure 24 has a positioning post 23, and the positioning post 23 is engaged with the positioning hole 121 of the second substrate 120. Further, the engagement between the second substrate 120 and the positioning structure 24 can be reinforced by glue. In this embodiment, since the lens barrel 21 does not need to directly mold the positioning structure, nor does it need to process the positioning structure on the lens barrel, the manufacturing process of the lens barrel can be simplified, which is helpful for improving the yield.

Further, fig. 9 is a perspective exploded view of a periscopic camera module according to another embodiment of the present application. Referring to fig. 9, in the present embodiment, the bottom surfaces of the first base 110, the second base 120, the third base 130, and the cylindrical bracket 150 are all mounted on the same reinforcing plate 190. Other components and structures of this embodiment are the same as those of the embodiment of fig. 7, and are not described again. In this embodiment, through increasing stiffening plate 190, can increase the structural strength and the bottom surface roughness of long burnt periscopic formula module of making a video recording to promote the formation of image quality, improve the production yield.

Further, fig. 10 is an exploded perspective view of a periscopic camera module according to still another embodiment of the present application. Referring to fig. 10, in the present embodiment, the second substrate 120 and the third substrate 130 (refer to fig. 7) are a common substrate 180 (refer to fig. 10). Further, the second housing 220 and the third housing 230 (see fig. 7) may be a common housing 290 (see fig. 10). The design can increase the installation consistency of the lens and the second prism, increase the coaxiality of the lens and the second prism, namely, the centers of the lens and the second prism can be well aligned, the structural complexity is reduced, and the assembly difficulty is reduced.

Further, fig. 11 shows a schematic connection relationship between the second reflecting element 30 and the cylindrical supporter 150 in an embodiment of the present application. Referring to fig. 11, in the present embodiment, the second reflecting element 30 (i.e., the second prism) is a triangular prism. Cylindrical holder 150 has an axis and first and second open ends. The first open end and the second open end each have a rectangular profile. The exit surface and the second open end of the second prism have mutually adapted first plug structures, and the second prism is embedded with the cylindrical support 150 through the first plug structures. Specifically, in this embodiment, a boss 30a for plugging can be formed on the exit surface of the second prism, the second opening end of the cylindrical bracket 150 has a mounting groove 150a, and the boss 30a can be inserted into the mounting groove 150 a. In other words, the boss 30a and the mounting groove 150a may constitute the first insertion structure that is fitted to each other. The joint of the first plug structure may have a rubber material to reinforce the engagement between the second prism and the cylindrical bracket 150.

Further, fig. 12 shows a schematic connection relationship between the second reflecting element 30 and the optical lens 20 in an embodiment of the present application. Referring to fig. 12, in the present embodiment, an optical lens 20 includes a lens barrel 21 and at least three lenses 22 (not shown in fig. 12) mounted in the lens barrel 21. The outer contour of the lens barrel 21 may be rectangular, the rear end of the lens barrel 21 (i.e., the exit end of the optical lens) and the incident surface of the second prism have second insertion structures that are adapted to each other, and the second prism may be embedded with the lens barrel 21 through the second insertion structures. Specifically, in this embodiment, a boss 30b for insertion may be formed on the incident surface of the second prism, the rear end of the lens barrel 21 has an installation groove 21b, and the boss 30b may be inserted into the installation groove 21 b. In other words, the boss 30b and the mounting groove 21b may constitute the second insertion structure that is adapted to each other. The joint of the second inserting structure may further have a glue material to reinforce the engagement between the second prism and the lens barrel 21. Further, in the present embodiment, the front end of the lens barrel 21 (i.e., the incident end of the optical lens 20) may also form a diaphragm whose aperture (light passing hole) is circular, so as to better fit with a circular lens. In this embodiment, the optical lens 20 and the second prism may be combined first, and then the combined body of the optical lens 20 and the second prism may be mounted on the second substrate 120 and the third substrate 130 (the second substrate and the third substrate may be the same substrate 180 in common), so that the coaxiality of the optical lens and the second prism may be increased, that is, the centers of the optical lens and the second prism may be better aligned.

In other embodiments, the second prism may be embedded with the cylindrical support by a prefabricated intermediate structural member, and the embedding may be reinforced by glue. The second prism can be embedded with the lens barrel through a prefabricated intermediate structural part, and the embedding can be reinforced by glue. The middle structural part and the second prism can be formed respectively and then embedded or bonded, and then the middle structural part is embedded with the cylindrical support or the lens cone through the first inserting structure or the second inserting structure.

Further, in an embodiment of the present application, the third substrate may include a substrate body and a second wedge-shaped support, the inclined surface of the second prism is mounted and supported on the inclined surface of the second wedge-shaped support, and the second wedge-shaped support may be driven by the driving module to move relative to the base body, so as to assist in optical anti-shake and other functions of the periscopic camera module.

Further, in an embodiment of the present application, the periscopic camera module may further include a connector and a flexible connection belt. The connector may be connected to the substrate by a flexible connecting strip. The base may be a first base, a second substrate, a third substrate, or a fourth substrate. The connector may have only one or a plurality of connectors. When there are a plurality of connectors, these connectors may be to be connected to different substrates by different flexible connections, respectively.

It should be noted that in the present application, the edge region of the optical surface of the prism is usually an optically inactive area, i.e., the edge region of the optical surface may not pass light, and in this case, a part of the edge region of the prism may be cut (e.g., cut one or more edges) for the purpose of saving volume or other purposes. For example, in some embodiments of the present application, the first reflective element may be a variation of a triangular prism, such as a prism cut from at least one edge of the triangular prism. For convenience of description, a prism obtained by cutting one or more edges of a triangular prism at an edge region is herein referred to as a triangular prism. Similarly, when the second reflecting element is a prism, the edge of the edge region thereof may be cut. For example, one or more edges of a prism having a parallelogram in transverse cross section may also be cut, and for convenience of description, the cut prism is still considered as a prism having a parallelogram in transverse cross section.

Further, according to an embodiment of the application, an electronic device based on a periscopic camera module is also provided. The electronic device may be, for example, a smartphone or a tablet computer. The electronic device may include the periscopic camera module according to any of the embodiments, wherein an incident direction of incident light of the first reflective element of the periscopic camera module is consistent with a thickness direction of the electronic device. The present embodiment can contribute to realizing a telephoto function (or a high power zoom function) in an electronic apparatus having a small thickness.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a periscopic module of making a video recording which characterized in that includes:

the first reflecting element is used for reflecting incident light to enable the incident light to be longitudinally bent, the first reflecting element is arranged on the first base, and in the longitudinal bending, the optical axis before bending and the optical axis after bending are both positioned on a longitudinal plane;

the optical lens is used for receiving the light reflected by the first reflecting element and outputting an imageable light beam to an image space, and the optical lens is arranged on the second substrate;

a second reflecting element including at least one second reflecting surface, the at least one second reflecting surface being adapted to transversely turn the imageable light beam at least once, the second reflecting element being a second prism and the second reflecting surface being located at a side of the second prism, the second prism being mounted on a third substrate, wherein surfaces of the second substrate and the third substrate are perpendicular to an incident direction of the incident light, the transverse turning is implemented such that an optical axis before turning and an optical axis after turning are both located on a transverse plane, and the transverse plane is perpendicular to the longitudinal plane; and

the photosensitive chip is suitable for receiving the imageable light beam which is transversely turned by the second reflecting element, the photosensitive chip is adhered to a fourth substrate, and the surface of the fourth substrate is parallel to the incident direction of the incident light;

the second reflecting element comprises a plurality of groups of second reflecting surfaces, each group comprises two second reflecting surfaces which are parallel to each other, and any two adjacent groups of second reflecting surfaces are arranged in a V shape or an inverted V shape; the transverse cross-sectional shape of the second prism is a V shape or an inverted V shape, or a shape formed by splicing a plurality of V shapes or inverted V shapes.

2. The periscopic camera module according to claim 1, wherein a bottom surface of the second prism abuts against the third substrate, and the second prism and the third substrate are fixed together by means of adhesion or fitting.

3. The periscopic camera module of claim 1, wherein all optical surfaces of the second prism are located at the sides of the second prism, wherein the optical surfaces comprise a reflective surface, an incident surface and an exit surface, and the reflective surface comprises a plurality of second reflective surfaces.

4. The periscopic camera module of claim 1, wherein the second reflective surface is a 45 degree reflective surface; the first reflecting element is provided with a first reflecting surface, and the first reflecting surface is a 45-degree reflecting surface.

5. The periscopic camera module of claim 1, further comprising a first housing mounted to the first base and housing the first reflective element.

6. The periscopic camera module of claim 1, further comprising a second housing mounted to a second substrate and housing the optical lens.

7. The periscopic camera module of claim 1, further comprising a third housing mounted to a third substrate and housing the second reflective element.

8. The periscopic camera module of claim 1, further comprising a cylindrical support having an axis perpendicular to a surface of the fourth substrate, a first open end, and a second open end, the fourth substrate being mounted at the first open end, the second open end being disposed opposite the exit surface of the second reflective element.

9. The periscopic camera module of claim 8, wherein the first open end and the second open end each have a rectangular profile.

10. The periscopic camera module of claim 8, wherein the exit surface and the second open end of the second prism have first mating structures that mate with each other, and the second prism is engaged with the cylindrical holder by the first mating structures.

11. The periscopic camera module of claim 10, wherein the joint of the first plug structure has a glue material to reinforce the fitting of the second prism with the cylindrical bracket.

12. The periscopic camera module of claim 1, wherein the second substrate and the third substrate are a common substrate.

13. The periscopic camera module of claim 8, wherein the first base, the second base, the third base, and the bottom surface of the cylindrical support are all mounted to a same stiffener.

14. The periscopic camera module according to claim 1, wherein the first reflecting element is a first prism, the first prism is a triangular prism, an inclined surface of the triangular prism is a reflecting surface, and two mutually perpendicular side surfaces of the triangular prism are respectively an incident surface and an exit surface of the first reflecting element.

15. The periscopic camera module of claim 14, wherein the first base comprises a base body and a first wedge-shaped support mounted within the base body, the angled face of the first prism being mounted to and bearing against the angled face of the first wedge-shaped support.

16. The periscopic camera module of claim 15, wherein the first base further comprises a drive module adapted to drive the first wedge support to move relative to the base body.

17. The periscopic camera module of claim 1, wherein the optical lens comprises a lens barrel and at least three lenses mounted within the lens barrel; the surface of the second substrate is provided with a positioning column, and the lens barrel is arranged on the second substrate through the positioning column.

18. The periscopic camera module of claim 17, wherein the outer profile of the lens barrel is rectangular; the rear end of the lens cone and the incident surface of the second prism are provided with second inserting structures which are mutually matched, and the second prism is embedded with the lens cone through the second inserting structures.

19. The periscopic camera module of claim 18, wherein the joint of the second plug structure has a glue material to reinforce the engagement of the second prism with the lens barrel.

20. The periscopic camera module of claim 3, wherein the third substrate comprises a substrate body and a second wedge-shaped support, the inclined surface of the second prism is mounted on and bears against the inclined surface of the second wedge-shaped support, and the second wedge-shaped support is movable relative to the base body under the driving of the driving module.

21. The periscopic camera module of claim 1, wherein the optical lens has an effective focal length of 15mm or more or a field angle of 25 degrees or less.

22. The periscopic camera module of claim 1, wherein the optical lens has an effective focal length of 18mm or more or a field angle of 20 degrees or less.

23. The periscopic camera module of claim 1, wherein the optical lens has an effective focal length of 25mm or more or a field angle of 15 degrees or less.

24. An electronic device, comprising: the periscopic camera module of any one of claims 1-23, wherein the incident direction of the incident light of the first reflective element coincides with the thickness direction of the electronic device.