Periscopic camera module

Abstract

The utility model relates to the technical field of cameras, and discloses a periscopic camera module, which comprises a light steering assembly, a collimation assembly, a resonant cavity and a lens module, the light steering assembly is provided with a light inlet surface and a light outlet surface, and an optical filter is arranged in the lens module. The light beam is reflected by the light steering assembly from the light incoming direction to be emitted to the collimation assembly along the light outgoing direction, the collimation assembly focuses and collimates the light to ensure that the light can be reflected in the resonant cavity according to an expected path, and the light beam feedback efficiency and the light beam stability in the resonant cavity are improved. The resonant cavity continuously reflects after the light beam is emitted into the cavity so as to enhance energy, and the light intensity of the emergent light beam is enhanced, so that the lens module can identify more information; and meanwhile, the light beam is continuously reflected in the resonant cavity, so that the light path distance is increased, the far-focus distance is increased, the photographing quality of the camera module is improved, and the cost is reduced relative to the increase of more setting heads.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, and in particular to a periscope camera module. Background Art

[0002] The periscope camera module is a unique optical system, inspired by the periscope of a submarine. This camera features a long focal length and a unique lens structure, which refracts light from the lens surface to the interior, achieving distortion-free imaging. The key feature of the periscope camera module is its ability to refract light onto the built-in image sensor, enabling distortion-free imaging within a limited range.

[0003] As global mobile phone shipments gradually increase each year, the accompanying auxiliary lens module industry has also grown rapidly. In order to improve the quality of camera photos and adapt to more shooting scenes through different focal lengths, the number of lens modules equipped on each mobile phone has increased from one to four or more. The increase in the number of lenses places higher performance requirements on the signal processor, and increases the difficulty of noise bad pixel removal and automatic exposure control. These all require higher-performance signal processors to support the work of multi-lens modules, which invisibly increases the manufacturing cost of the camera module. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a periscope camera module to solve the problem of increased costs caused by increasing the number of lenses to improve the camera's photographic quality.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a periscope camera module including a light deflection component, a collimation component, a resonant cavity and a lens module arranged in sequence along a light output direction, the light deflection component having a light input surface for allowing a light beam to enter the light deflection component along a light input direction and a light output surface for reflecting the light beam from the light deflection component along the light output direction and outputting it toward the collimation component, the collimation component is used to focus the light beam emitted from the light output surface and collimate it to the resonant cavity, the resonant cavity is used to continuously reflect the light beam to increase the optical path distance, thereby performing total reflection on the incident light when the incident light is collimated, so as to initially set the light beam after continuous reflection in the cavity, thereby increasing the far focus distance, and effectively reducing the cost while improving the quality of the photos.

[0006] Furthermore, the collimating component includes an optical lens for focusing and collimating the light beam emitted from the light emitting surface onto the resonant cavity, so as to focus and collimate the light beam reflected by the light redirecting component to ensure that as much light as possible enters the resonant cavity.

[0007] Further, the resonant cavity includes a whispering gallery microcavity. When the light beam enters the whispering gallery microcavity, the incident angle Δ1 of the incident light is smaller than the refraction angle Δ2, and the refractive index n2 of the coating on the refracting surface is greater than the refractive index n1 of the coating on the reflecting surface, satisfying sinΔ2 / sinΔ1 = n1 / n2 to achieve the total reflection condition and reduce or even avoid the loss of the light beam during reflection.

[0008] Further, the interior of the resonant cavity is made of silicon oxide and has an annular structure, ensuring that the overall diameter of the microcavity can reach 50 μm and providing more possibilities in manufacturing.

[0009] Further, the light beam steering component includes a first carrier and a prism mounted on the first carrier. The prism has the light incident surface and the light exit surface facing the collimating component, facilitating the installation and reflection of the light beam.

[0010] Further, a first mounting groove adapted to the outer contour of the prism is formed on the first carrier for mounting the prism therein. The first side of the first mounting groove penetrates the first carrier along the light incident direction, and the side of the first mounting groove facing the light beam steering component penetrates the first carrier along the light exit direction, enabling the light beam to shoot towards the light incident side of the prism and exit from the light exit side.

[0011] Further, the lens module includes a base with a hollow interior, a lens assembly mounted inside the base, a sensor assembly mounted on the base and facing the base along the light exit direction, and a circuit board mounted outside the base and electrically connected to the sensor assembly. One side of the base facing the resonant cavity is open to form an open side. The lens assembly is disposed opposite to the resonant cavity for the light beam to sequentially shoot towards the lens assembly and the sensor assembly for imaging.

[0012] Further, a second mounting groove penetrating the open side is formed in the base along the reverse light exit direction, and the lens assembly is detachably mounted in the second mounting groove for easy installation and disassembly of the lens assembly.

[0013] Further, the first side of the base adjacent to the open side is arranged in a through manner. The lens assembly includes a second carrier mounted in the second mounting groove and a lens. A flange is convexly provided on the outer wall of the lens. A third mounting groove adapted to the outer contour of the lens is formed in the second carrier. The first side and the side facing the resonant cavity of the third mounting groove are both arranged in an open manner. The lens is clamped into the third mounting groove from the first side of the second carrier for easy assembly between the second carrier and the lens and for limiting the lens.

[0014] Further, the periscope camera module of the present utility model further includes an anti-shake component disposed inside the base, and the lens assembly is mounted on the anti-shake component to ensure optical anti-shake and improve the image quality.

[0015] The periscope camera module of the present utility model has at least the following beneficial effects: Through the coordinated use of the light deflection component, the collimation component, the resonant cavity, and the lens module, the light beam is reflected by the light deflection component from the light incident direction to shoot towards the collimation component along the light exit direction. The collimation component focuses and collimates the light to ensure that the light can be reflected along the expected path in the resonant cavity, improving the beam feedback efficiency and beam stability in the resonant cavity. The resonant cavity continuously reflects the light beam after it enters the cavity to enhance the energy, and the outgoing light beam will enhance the light intensity, so that the lens module can identify more information. At the same time, the continuous reflection of the light beam in the resonant cavity will increase the optical path distance and improve the telephoto distance, so as to improve the photographing quality of the camera module. At the same time, compared with adding more lenses, the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the present utility model after hiding the collimation component and the resonant cavity;

[0019] Figure 3 is an optical path diagram when the present utility model is in use;

[0020] Figure 4 is a side view of the prism of the present utility model;

[0021] Figure 5 is a schematic diagram of the waveguide coupling structure of the resonant cavity of the present utility model;

[0022] Figure 6 is a diagram of the beam interference principle in the resonant cavity of the present utility model;

[0023] Figure 7 is a partial side cross-sectional view of the prism of the light deflection component of the present utility model in the state where the prism is not installed in place;

[0024] Figure 8 is a partial side cross-sectional view of the prism of the light deflection component of the present utility model in the state where the prism is installed in place.

[0025] The meanings of the reference numerals in the drawings are as follows:

[0026] Light deflection component - 1; First carrier - 11; First mounting groove - 111; Avoidance groove - 112; Limit edge - 113; Prism - 12; Light incident surface - 121; Light exit surface - 122; Reflective inclined surface - 123; Elastic piece - 13; Tightening end - 131; Limit end - 132; Collimating component - 2; Resonant cavity - 3; Lens module - 4; Base - 41; Second mounting groove - 411; Open side - 412; Lens component - 42; Second carrier - 421; Lens - 422; Flange - 423; Third mounting groove - 424; Limiting structure - 425; Elastic limiting strip - 4251; Arc-shaped buckle - 4252; Curved arc end - 4253; Card slot structure - 426; Convex edge - 427; Sensor component - 43; Circuit board - 44; First side - 5. Detailed implementation mode

[0027] The present utility model will be further described below with reference to the accompanying drawings.

[0028] As Figures 1 to 8 shown, the periscope camera module of the present utility model includes a light deflection component 1, a collimating component 2, a resonant cavity 3 and a lens module 4 arranged in sequence along a light exit direction. A light beam is incident on the light deflection component 1 along a light incident direction, and the light deflection component 1 reflects the light beam and emits it along a light exit direction different from the light incident direction to the collimating component 2. The collimating component 2 focuses and collimates the light beam reflected from the light deflection component 1 and then emits it to the resonant cavity 3. The light beam undergoes total internal reflection in the resonant cavity 3, so that the optical path distance is increased after continuous reflection in the cavity, effectively improving the telephoto distance. At the same time, the energy of the light beam is enhanced during continuous reflection in the cavity, so that the light beam intensity and phase are improved when the light beam is emitted to the lens module 4. The lens module 4 can identify more information after receiving the light beam emitted from the resonant cavity 3, so as to improve the image imaging quality and the photo-taking quality.

[0029] In this embodiment, the periscope camera module has a housing (not shown in the figure) with a hollow cavity inside. The light deflection component 1, the collimating component 2, the resonant cavity 3 and the lens module 4 are sequentially installed in the housing. An light incident port is opened through the housing along the light incident direction at a position directly facing the light deflection component 1 along the light incident direction, so that the light beam can be incident on the light deflection component 1 through the light incident port. In the present utility model, the light incident direction is perpendicular to the housing and the light deflection component 1, and the light exit direction is usually perpendicular to the light incident direction.

[0030] In this embodiment, the light turning component 1 includes a first carrier 11 and a prism 12 mounted on the first carrier 11. The first carrier 11 is used to carry the prism 12 to facilitate the installation and fixation of the prism 12. The prism 12 is used to reflect and turn the light beam to flip the inverted image to the normal state, and at the same time facilitate the cooperation with other parts to achieve the conduction and imaging of light. In the content defined in this embodiment, the first carrier 11 is in the shape of a cuboid, and a first installation groove 111 adapted to the outer contour of the prism 12 is formed on the first carrier 11 for the prism 12 to be installed therein. In this embodiment, one side surface of the prism 12 and other structures facing the light inlet along the light incident direction is defined as the first side 5. The first side 5 of the first installation groove 111 penetrates the first carrier 11 along the light incident direction so that the light beam can be incident on the light incident side and enter the prism 12. One side of the first installation groove 111 facing the light turning component 1 penetrates the first carrier 11 along the light exit direction, and the two side surfaces of the first carrier 11 penetrated are adjacent to each other. In the content defined in this embodiment, the prism 12 is a triangular prism 12 and has a light incident surface 121 for the light beam to enter the light turning component 1 along a light incident direction and a light exit surface 122 facing the collimating component 2 for reflecting the light beam out of the light turning component 1 along the light exit direction to the collimating component 2. The first installation groove 111 correspondingly has a triangular prism-shaped structure. The light incident surface 121 and the light exit surface 122 are perpendicular to each other and adjacent to each other. After the prism 12 is installed in the first installation groove 111, the light incident surface 121 is distributed facing the light inlet along the light incident direction, and the light exit surface 122 is distributed facing the collimating component 2 along the light exit direction. The prism 12 also has a reflection inclined surface 123 that is inclined relative to the light incident surface 121 and the light exit surface 122 and is adjacent to the light incident surface 121 and the light exit surface 122 respectively. On the first installation groove 111, there is a support inclined surface corresponding to support and cover the reflection inclined surface 123, so that the light beam is transmitted through the prism 12 from the light incident side and then incident on the reflection inclined surface 123. The reflection inclined surface 123 reflects the light beam at a reflection angle of about 90 degrees to the light exit surface 122, and the light beam reflected by the reflection inclined surface 123 is emitted along the light exit direction. To facilitate the installation or disassembly of the prism 12 in the first carrier 11, the prism 12 is movably installed in the first installation groove 111, that is, when the prism 12 is installed in the first installation groove 111, there is a gap between the prism 12 and the inner wall of the first installation groove 111. To prevent the prism 12 from loosening after installation, relief grooves 112 are recessed backward along the axial direction of the prism 12 on both side surfaces of the first installation groove 111 corresponding to the prism 12 being triangular in the axial direction. The relief grooves 112 are square, and the length direction of the relief grooves 112 is parallel to the light exit direction. The length of the relief grooves 112 is less than the length of the prism 12 in the light exit direction after the prism 12 is installed in the first installation groove 111, so that the prism 12 cannot pass through the relief grooves 112, facilitating the use of tools to clamp or loosen the prism 12 when installing or disassembling the prism 12.In this embodiment, the opening on one side of the first mounting groove 111 that is penetrated by the first carrier 11 along the light-emitting direction is defined as the light-emitting groove opening, and the avoidance groove 112 communicates with the light-emitting groove opening along the light-emitting direction. On both sides of the light-emitting groove opening corresponding to the two avoidance grooves 112, there are oppositely extending limiting edges 113 for blocking the prism 12. The limiting edges 113 prevent the prism 12 from detaching from the first mounting groove 111 through the light-emitting groove opening along the support inclined plane after being mounted on the first carrier 11. It should be noted that the distance between the two limiting edges 113 is less than the length of the prism 12 in the axial direction, and the difference between the distance between the two limiting edges 113 and the length of the prism 12 in the axial direction is within 1 mm, so as to ensure that the prism 12 will not detach while not overly obstructing the light beam. In order to fix the prism 12 after it is mounted in the first mounting groove 111, a pressing portion for pressing against the prism 12 is detachably provided in each of the two avoidance grooves 112. In this embodiment, the pressing portion includes a spring piece 13 whose middle is hinged in the avoidance groove 112. The spring piece 13 has an "S" shape, and its two ends respectively have a pressing end 131 with a curved arc shape and a terminal end abutting against the inner wall of the avoidance groove 112, and a limiting end 132 with a reverse arc shape relative to the pressing end 131. The middle of the pressing end 131 extends into the first mounting groove 111, and the terminal end of the pressing end 131 abuts against the inner wall of the avoidance groove 112 on the side away from the first mounting groove 111. When the prism 12 is not mounted in the first mounting groove 111, the pressing end 131 is in a normal state, and the limiting end 132 is located on the side facing away from the avoidance groove 112, that is, inside the avoidance groove 112. The entire spring piece 13 is supported by plastic and has elasticity and a self-recovery function. When the prism 12 is installed, the prism 12 gradually moves into the first mounting groove 111 along the light-incident direction. During this process, the triangular side surface of the prism 12 gradually presses against the pressing end 131 and presses the pressing end 131 into the avoidance groove 112. Since the terminal end of the pressing end 131 abuts against the inner wall of the avoidance groove 112, the two ends of the pressing end 131 are deformed and contract towards each other during the extrusion process, so that the pressing end 131 abuts against the inner wall of the avoidance groove 112 and the side surface of the prism 12 respectively. During the deformation process of the pressing end 131, the extrusion of the prism 12 causes the spring piece 13 to rotate, causing the pressing end 131 to swing towards the inside of the avoidance groove 112, and the limiting end 132 to swing towards the inside of the first mounting groove 111, that is, towards the inside of the avoidance groove 112. Until the reflection inclined plane 123 of the prism 12 contacts the support inclined plane, the pressing end 131 is pressed by the prism 12 and is in a deformed and contracted state, and the terminal end of the limiting end 132 is buckled into the first side 5 of the prism 12 towards the inside of the first mounting groove 111, thereby restricting the freedom degree of the prism 12 in the light-incident direction, cooperating with the limiting edge 113 to prevent the prism 12 from detaching from the first carrier 11. At the same time, through the pressing and limiting of the two pressing ends 131, the shaking of the prism 12 is further avoided, preventing the prism 12 from shifting before the prism 12 is fixed with glue, or even being able to fix the prism 12 without using glue.Moreover, when installing, it is not necessary to manually operate the elastic piece 13 to ensure the fixation of the prism 12. When disassembling and replacing the prism 12, only need to pry open the limiting end 132, and the prism 12 can be ejected from the reflection inclined plane 123 of the prism 12. It should be noted that when the limiting end 132 is buckled on the first side 5 of the prism 12, only the side of the prism 12 is buckled to minimize the influence on the light beam.

[0031] In this embodiment, the collimation component 2 includes an optical lens for focusing and collimating the light beam emitted from the light-emitting surface 122 into the resonant cavity 3. An outer frame is provided around the outer peripheral side of the optical lens to facilitate the installation of the optical lens. The optical lens includes a collimating lens and a focusing lens. The collimating lens is closer to the prism 12, and the focusing lens is closer to the resonant cavity 3. The collimating lens 422 is used to collimate the light rays emitted from the light-emitting surface 122, make the light beam more uniform and emit it towards the focusing lens. The focusing lens focuses the uniform light beam onto a point to increase the energy density of the light beam, and cooperates with the total reflection of the resonant cavity 3 to further enhance the energy, obtain a better far focal distance, and improve the shooting quality.

[0032] As Figure 4 shown, in this embodiment, the resonant cavity 3 can adopt a micro F - B resonant cavity 3. In the content defined in this embodiment, the resonant cavity 3 includes a whispering - gallery microcavity, and the whispering - gallery microcavity has multiple coupling modes. Figure 4 As shown in the figure is the beam propagation direction of waveguide coupling. The inside of the resonant cavity 3 is made of silicon oxide and has an annular structure. After the light beam enters the resonant cavity 3, the light fluctuates in a ring - shaped bending pattern inside it. The light is coupled from the cavity into a special optical waveguide to achieve the total reflection condition. The light beam has almost no loss during reflection, the light dissipation is small, and the light energy is enhanced every time the light is reflected. When the light beam exits later, it is enhanced by the camera lens assembly 42. In this embodiment, when the light enters from a medium with a higher refractive index (also called an optically dense medium) into a medium with a lower refractive index (also called an optically sparse medium), for example, when the light enters from glass into air, it will occur, but when the light enters from air into glass, it will not. The detailed description is that when the light enters the waveguide, the incident angle Δ1 and the refraction angle Δ2 of the incident light satisfy Δ1 < Δ2, and the refractive index n2 of the coated film on the refraction surface is greater than the refractive index n1 of the coated film on the reflection surface, satisfying sinΔ2 / sinΔ1 = n1 / n2.

[0033] In this embodiment, the lens module 4 includes a base 41 with a hollow interior, a lens assembly 42 installed in the base 41, a sensor assembly 43 installed on the base 41 and facing the base 41 in the light-emitting direction, a circuit board 44 installed outside the base 41 and electrically connected to the sensor assembly 43, and a filter installed on the base 41. The base 41 facilitates the installation of other components. The lens assembly 42 is used to focus the reflected light emitted from the resonance point to the sensor assembly 43. The sensor assembly 43 converts the captured light into an electrical signal, which is finally processed into a digital signal to complete imaging. The circuit board 44 provides an electrical signal to the sensor assembly 43. The filter is used to screen the light beam so that the corresponding light passes through and is directed to the sensor assembly 43.

[0034] In the content defined in this embodiment, the base 41 has a cubic structure to facilitate installation in the housing. A second installation groove 411 in the shape of a cube is formed in the base 41. On one side of the base 41 facing the resonance cavity 3, an open side 412 is formed by penetrating and opening in the direction opposite to the resonance cavity 3 along the light-emitting direction. The second installation cavity penetrates the open side 412 along the light-emitting direction. The lens assembly 42 is detachably installed in the second installation groove 411, and the lens assembly 42 is spaced apart from the resonance cavity 3 in the light-emitting direction and is arranged to face the resonance cavity 3 through the open side 412. The first side 5 of the base 41 adjacent to the open side 412 is arranged to penetrate in the opposite direction of the light-incident direction.

[0035] In the content defined in this embodiment, the lens assembly 42 includes a second carrier 421 installed in the second installation groove 411 and a lens 422 installed on the second carrier 421. The second carrier 421 is installed in the second installation groove 411 from the open side 412 to facilitate the installation and disassembly of the second carrier 421. The lens 422 has an overall cylindrical structure, and a flange 423 is convexly provided on the outer wall of the lens 422. The flange 423 protrudes on the outer wall of the lens 422 along the circumferential direction of the lens 422. The flange 423 can be provided as one or multiple. The flange 423 makes the outer wall of the lens 422 have multiple convex bodies or grooves. A third installation groove 424 that is consistent with and adapted to the outer contour of the lens 422 is provided on the second carrier 421. The first side 5 of the third installation groove 424, the side facing the resonant cavity 3, and the side facing away from the resonant cavity 3 along the light output direction are all arranged in an open manner, and the lens 422 is installed in the third installation groove 424 from the first side 5 of the third installation groove 424. The lens 422 is clamped therein through a groove structure corresponding to the flange 423 in the third installation groove 424, so as to limit the movement of the lens 422 to a certain extent after the lens 422 is installed. To facilitate the installation of the lens 422, there is always a gap between the third installation groove 424 and the lens 422. To prevent the lens 422 from shaking, a limiting structure 425 for limiting the lens 422 is provided in the third installation groove 424, and at least two flanges 423 are provided on the outer wall of the lens 422. A card slot structure 426 is formed between two adjacent flanges 423. The limiting structure 425 includes an elastic limiting strip 4251 and an arc-shaped buckle 4252 provided on the elastic limiting strip 4251 that is consistent with and adapted to the card slot structure 426. A convex edge 427 is formed by extending in opposite directions along both sides where the axial direction of the prism 12 is located at the open end of the first side 5 of the base 41. After the second carrier 421 is installed in the second installation groove 411, the convex edge 427 blocks the second carrier 421 so that the second carrier 421 will not reverse and disengage along the light incident direction. The elastic limiting strip 4251 is arranged along the axial direction of the prism 12 and both ends have arc-shaped ends 4253 that bend and extend in the opposite direction of the light incident direction. The elastic limiting strip 4251 is made of plastic so that the arc-shaped ends 4253 have a certain elasticity. The maximum distance between the two arc-shaped ends 4253 is greater than the distance between the two convex edges 427, so that the arc-shaped ends 4253 can be pressed into the space between the two convex edges 427 and press against the convex edge 427, thereby clamping the elastic limiting strip 4251 on the base 41.The arc-shaped buckle 4252 extends in a curved arc from the elastic limit strip 4251 towards one side of the base 41 and is distributed at intervals towards one side of the base 41. The two ends of the arc-shaped buckle 4252 correspond to the slot structure 426. The arc-shaped buckle 4252 is in the shape of a major arc and has the same diameter as the outer diameter of the lens 422. After the lens 422 is installed in the third installation groove 424, the two ends of the arc-shaped buckle 4252 are inserted into the slot structure 426 until the two curved arc ends 4253 abut against the convex edge 427. The arc-shaped buckle 4252 is sleeved in the slot structure 426 to complete the limit of the lens 422 in the light incident direction, facilitating the installation and limit of the lens 422. At the same time, the limit structure 425 is simple and convenient to install and disassemble; and to a certain extent, it can block part of the gap between the base 41 and the lens 422, preventing stray light from reflecting inside and affecting imaging.

[0036] In the content defined by this embodiment, the sensor assembly 43 is installed on one side of the base 41 away from the open side 412. Since this side is also arranged in an open manner, the circuit board 44 is installed at a position on the outer wall of the base 41 corresponding to this side and is electrically connected to the sensor assembly 43 through the open. The sensor assembly 43 includes a bracket installed on the base 41 and an image sensor installed on the bracket. The filter is installed between the lens 422 and the image sensor so that the light beam can be emitted towards the image sensor after passing through the filter. The image sensor is electrically connected to the circuit board 44 for shooting and imaging.

[0037] The periscope camera module of the present utility model further includes an anti-shake component arranged in the base 41. The lens assembly 42 is installed on the anti-shake component to achieve optical anti-shake. The anti-shake component can also be installed on the sensor assembly 43 or not provided. The anti-shake component can use a voice coil motor to achieve the anti-shake function. The voice coil motor is an existing application technology and will not be elaborated here.

[0038] The working mode of one embodiment of the periscope camera module of the present utility model is as follows: The light source of the present utility model is natural light or a lighting source. The light beam is incident on the light incident surface 121 along the light incident direction and then on the reflection inclined surface 123. The reflection inclined surface 123 reflects the light beam towards the light exit surface 122 and along the light exit direction towards the collimating component 2. The collimating component 2 collimates and focuses the light beam into the imaging resonant cavity 3. The light beam is continuously reflected in the resonant cavity 3 to enhance the ability, achieve total reflection, increase the optical path distance, and increase the telephoto distance. Then, the light beam continues to be incident on the lens assembly 42, the filter until it reaches the sensor assembly 43.

[0039] In this embodiment, Figure 3 where P1 represents the prism 12, P2 represents the collimating component 2, P3 represents the resonant cavity 3, and P4 represents the lens module 4 to express the light beam path in this way.

Claims

1. A periscope camera module, characterized in that: It includes a light ray turning component, a collimating component, a resonant cavity and a lens module arranged in sequence along an outgoing light direction. The light ray turning component has an incident light surface for allowing a light beam to enter the light ray turning component along an incoming light direction and an outgoing light surface for reflecting the light beam out of the light ray turning component along the outgoing light direction and emitting it to the collimating component. The collimating component is used to focus the light beam emitted from the outgoing light surface and collimate it to the resonant cavity. The resonant cavity is used to continuously reflect the light beam to increase the optical path distance.

2. The periscope camera module according to claim 1, wherein: The collimating component includes an optical lens for focusing and collimating the light beam emitted from the outgoing light surface to the resonant cavity.

3. The periscope camera module according to claim 1, wherein: The resonant cavity includes a whispering gallery microcavity. When the light beam enters the whispering gallery microcavity, the incident angle Δ1 of the incident light is less than the refraction angle Δ2, and the refractive index n2 of the coating on the refracting surface is greater than the refractive index n1 of the coating on the reflecting surface, satisfying sinΔ2 / sinΔ1 = n1 / n2.

4. The periscope camera module according to claim 3, wherein: The interior of the resonant cavity is made of silicon oxide and has an annular structure.

5. The periscope camera module according to claim 1, characterized in that: The light ray turning component includes a first carrier and a prism mounted on the first carrier. The prism has the incident light surface and the outgoing light surface facing the collimating component.

6. The periscope camera module according to claim 5, characterized in that: A first mounting groove adapted to the outer contour of the prism is formed on the first carrier for the prism to be mounted therein. The first side of the first mounting groove penetrates the first carrier along the incoming light direction, and the side of the first mounting groove facing the light ray turning component penetrates the first carrier along the outgoing light direction.

7. The periscope camera module according to claim 1, wherein: The lens module includes a base with a hollow interior, a lens component mounted in the base, a sensor component mounted on the base and facing the base along the outgoing light direction, and a circuit board mounted outside the base and electrically connected to the sensor component. One side of the base facing the resonant cavity is open to form an open side, and the lens component is arranged opposite to the resonant cavity.

8. The periscope camera module according to claim 7, wherein: A second mounting groove penetrating the open side is formed in the base along the outgoing light direction in the reverse direction, and the lens component is detachably mounted in the second mounting groove.

9. The periscope camera module according to claim 8, wherein: The first side of the base adjacent to the open side is arranged in a penetrating manner. The lens component includes a second carrier mounted in the second mounting groove and a lens. A flange is convexly provided on the outer wall of the lens. A third mounting groove adapted to the outer contour of the lens is formed along the second carrier. The first side and the side facing the resonant cavity of the third mounting groove are both arranged in an open manner, and the lens is clamped in the third mounting groove from the first side of the second carrier.

10. The periscope camera module according to claim 7, characterized in that: It also includes an anti-shake component arranged in the base, and the lens component is mounted on the anti-shake component.

Images