Periscope camera module

Abstract

The utility model relates to optical technology field discloses a periscope camera module, including the base with the installation cavity in the inside, the anti shake motor of installing on the base, the lens of installing on the anti shake motor and facing the installation cavity, the imaging component of installing on the base and the turning optical element, and light is along the light entrance direction from the lens and is along the light exit direction to the imaging component after shooting to the turning optical element, the lens has the light exit side to the side of the turning optical element, and the light exit side protrudes the shielding protruding portion for shielding stray light to the side of the turning optical element, the utility model discloses protrude shielding protruding portion on the lens to shield the gap between the lens and the turning optical element, thereby can make the effective light to the turning optical element, and as far as possible reduce stray light, reduce the formation of stray light, optimize the light effect, and simultaneously, the shielding protruding portion of suspension can guarantee that the shielding protruding portion does not hinder the movement of the lens, guarantees the completion of anti shake and automatic focusing.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a periscope camera module. Background Technology

[0002] A periscope camera module is a special camera module used in devices such as mobile phones or cameras. It achieves high optical zoom capabilities within a relatively small space through a folded optical path design. The periscope camera module employs a folded optical path design, where light is refracted as it enters the lens assembly. By using redirecting optical elements, the angle of the light path is changed, thus enabling shooting at a longer focal length. This design allows the camera module to be placed parallel to the device surface, no longer limited by lens height, providing greater flexibility for the device's internal design.

[0003] A periscope camera module consists of a base, a steering optics element, a lens, an image stabilization motor, an image sensor, and a circuit board. The image sensor and circuit board constitute the imaging component. During reflection, light passes through the lens at different positions and then strikes the steering optics element. This causes different light rays to strike different positions on the steering optics element. To facilitate the cooperation between the lens and the image stabilization motor for autofocus and image stabilization, the lens and the steering optics element are usually arranged with a gap between them. This gap causes a large amount of light to escape beyond the steering optics element, forming stray light. This stray light is reflected by the inner wall of the base, resulting in bright spots, overexposure, and other defects on the imaging component, thus reducing image quality. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a periscope camera module to solve the problem of stray light between the lens and the steering optical element.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a periscope camera module includes a base with an internal mounting cavity, a stabilization motor mounted on the base, a lens mounted on the stabilization motor and facing the mounting cavity, an imaging component mounted on the base, and a steering optical element. Light is incident from the lens to the steering optical element along the light-incident direction and then incident to the imaging component along the light-out direction. The lens has a light-out side facing the steering optical element, and a blocking protrusion protruding from the light-out side facing the steering optical element is suspended and used to block stray light.

[0006] Furthermore, the shielding protrusions are symmetrically distributed on both sides of the light-emitting side, parallel to the light-emitting direction; the two shielding protrusions extend toward the steering optical element along the light-inlet direction and are inclined toward each other.

[0007] Furthermore, the mounting cavity is provided with at least one shielding wall to block stray light when light is directed toward the imaging component; the mounting cavity has a light-emitting area close to the imaging component, and the shielding wall includes a first light-shielding sheet installed in the light-emitting area and coated with a light-absorbing material; the first light-shielding sheet has a first light-emitting port that allows effective light directed toward the imaging component to pass through.

[0008] Furthermore, one of the aforementioned blocking protrusions is located within the light-emitting area.

[0009] Furthermore, the shielding wall also includes a second light-shielding plate installed in the light-emitting area and spaced apart from the first light-shielding plate along the light-emitting direction. The second light-shielding plate has a second light-emitting port for effective light to pass through. The surface of the second light-shielding plate is coated with a light-absorbing material, and the second light-shielding plate is closer to the imaging component than the first light-shielding plate. The size of the second light-emitting port is larger than the size of the first light-emitting port so that the effective light, which gradually expands during the emission process, can pass through sequentially.

[0010] Furthermore, the light-emitting area has a connecting surface facing the imaging component along the light-emitting direction, and the first light-shielding plate is connected to the connecting surface; a baffle is formed on the side of the light-emitting area close to the turning optical element, the connecting surface is formed on the side of the baffle facing the imaging component, and a light-emitting channel is formed on the baffle along the light-emitting direction, with the first light-emitting port located inside the light-emitting channel.

[0011] Furthermore, the second light-shielding sheet is inserted into the light-emitting area along the height direction; the light-emitting area has recessed slots on both inner walls perpendicular to the height direction that penetrate one side of the base along the height direction, and both sides of the second light-shielding sheet have protrusions for abutting against the slots.

[0012] Furthermore, the second light-blocking plate is higher than the first light-blocking plate, and there is a clearance between the first light-blocking plate, the second light-blocking plate and the image stabilization motor for lens movement and focusing. An obstacle clearance notch is formed on the side of the image stabilization motor near the imaging component to avoid effective light.

[0013] Furthermore, the light-emitting area has an anti-reflective surface on its bottom surface away from the lens along the height direction; the shielding wall also includes a film laid on the bottom surface, and the anti-reflective surface is formed on the film.

[0014] Furthermore, the mounting cavity has an inclined surface facing the lens and tilted relative to the lens, and the inclined surface has a groove for mounting a steering optical element; the steering optical element includes a reflector disposed in the groove, and there is a clearance cavity between the reflector and the groove that faces and avoids a blocking protrusion.

[0015] The periscope camera module of this invention has at least the following beneficial effects: By extending a blocking protrusion on the light-emitting side of the lens, the gap between the lens and the steering optical element is blocked, thereby enabling effective light to be directed to the steering optical element while minimizing stray light and reducing the formation of stray light, thus optimizing the light effect; at the same time, the suspended blocking protrusion ensures that the blocking protrusion does not hinder the movement of the lens, ensuring the completion of image stabilization and autofocus. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the periscope camera module of this utility model; Figure 2 This is a half-sectional schematic diagram of the periscope camera module of this utility model; Figure 3 This is an exploded view of the periscope camera module of this utility model; Figure 4 for Figure 3 An enlarged view of part A shown; Figure 5 This is a schematic diagram of the lens structure of this utility model; Figure 6 This is a schematic diagram of the structure of the base of this utility model; Figure 7 This is a schematic diagram of the chip holder structure of this utility model. The meanings of the labels in the attached diagram are as follows: Base 1, mounting cavity 11, light inlet area 111, light outlet area 112, adhesive surface 12, connection port 13, chip bracket 14, inner opening 141, inner frame 142, mounting block 15, inclined surface 151, inclined groove 152, slot 16, image stabilization motor 2, clearance notch 21, lens 3, shielding protrusion 31, imaging assembly 4, main circuit board 41, photosensitive chip 42, filter 43, connector 44, steering optical element 5, shielding part 6, barrier 61, light outlet channel 611, step part 62, shielding surface 621, first light shield 63, first light outlet 631, second shield 64, second light outlet 641, film 65, protrusion 66. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Please see Figures 1 to 3The periscope camera module of this invention includes a base 1 with an internal mounting cavity 11, a stabilization motor 2 mounted on the base 1, a lens 3 mounted on the stabilization motor 2 and facing the mounting cavity 11, an imaging assembly 4 mounted on the base 1, a steering optical element 5 mounted on the base 1, and a shielding wall 6 formed within the mounting cavity 11. The base 1 supports the stabilization motor 2, the steering optical element 5, and the imaging assembly 4. The stabilization motor 2 moves the lens 3 to perform AF focusing and OIS image stabilization. The lens 3 focuses light onto the steering optical element 5; the steering optical element 5 folds and redirects light through reflection and refraction; the shielding wall 6 eliminates stray light when light is emitted towards the imaging assembly 4 in a light-emitting direction, thereby improving image quality. In use, light is emitted from the lens 3 towards the steering optical element 5 in the light-incoming direction and then towards the imaging assembly 4 in the light-emitting direction.

[0019] Please see Figures 1 to 3 as well as Figure 6 The base 1 can be injection molded from plastic and has thickness, length, and width, thus corresponding to three directions. The base 1 has a top surface and a bottom surface that are relatively distributed along the thickness direction. The mounting cavity 11 is recessed into the base 1 from the top surface. A notch is formed on the outer wall of the bottom surface of the base 1 at a position facing the lens 3 along the thickness direction, and a slope is formed in the mounting cavity 11 at the position facing the lens 3 and facing the notch. A mounting block 15 is formed on the slope to correspond to and be adapted to the steering optical element 5. The mounting block 15 has an inclined surface 151 that is parallel to the inclined surface and inclined relative to the lens 3. The mounting block 15 can be integrally formed with the base 1 or it can be a separate structure mounted on the base 1. During installation, the inclined surface 151 is used to face the imaging assembly 4. A groove 152 that is inclined relative to the lens 3 is formed on the inclined surface 151 corresponding to the steering optical element 5. The groove 152 passes through the top surface of the mounting block 15 to facilitate the installation of the steering optical element 5. After the steering optical element 5 is installed in the inclined groove 152, light from the lens 3 is directed towards the steering optical element 5 in the inclined groove 152 along the light-inlet direction, and after being reflected or refracted by the steering optical element 5, it is directed towards the imaging assembly 4 along the light-outlet direction.

[0020] In this system, the thickness direction is one of the light-incident directions. The angle between the parallel groove 152 and the inclined surface 151 relative to the light-incident direction is a first preset angle, which can range from 45° to 60°. The light path enters from the lens 3 along the light-incident direction. The closer the angle between the light-incident direction and the inclined surface 151 is to 45°, the closer the angle of the light path is to the horizontal after reflection by the steering optical element 5. As the angle gradually increases, the angle between the light path and the light-incident direction after reflection by the steering optical element 5 becomes smaller. The imaging component 4 has a second preset angle with the light-out direction, which is the absolute value of 45° minus the first preset angle.

[0021] An adhesive surface 12 is formed on the side of the base 1 away from the inclined groove 152 along the longitudinal direction. The adhesive surface 12 can be arranged perpendicular to the longitudinal direction or inclined relative to the longitudinal direction. The specific arrangement is set according to the cooperation between the imaging component 4 and the steering optical element 5.

[0022] Please see Figure 6 and Figure 7 To facilitate the installation of the imaging component 4 and to cooperate with the steering optical element 5 to reduce the overall height (i.e., thickness) of the periscope camera module, a connection port 13 is provided along the longitudinal direction of the adhesive surface 12, extending inwardly through the mounting cavity 11. A chip holder 14 is installed at the connection port 13, and the imaging component 4 is mounted on the chip holder 14 with its inner side directly exposed inside the mounting cavity 11, so that the light from the steering optical element 5 can pass through the mounting cavity 11 and be directed towards the imaging component 4. The connection port 13 extends through the adhesive surface 12 along the thickness direction, and the chip holder 14 is directly bonded to the adhesive surface 12 with adhesive. An inner opening 141 is provided along the longitudinal direction of the chip holder 14, and the bottom surface of the inner opening 141 is recessed or flush with the bottom surface of the mounting cavity 11. An engagement structure is provided on the inner edge of the chip holder 14 to facilitate bonding with adhesive after injection.

[0023] It should be noted that since the entire periscope camera module is used for installation inside electronic devices, corresponding grooves or flanges can be made on the outer wall of the base 1 to facilitate positioning and installation. The specific structure depends on the internal structure of the electronic device being used.

[0024] Please see Figures 1 to 3 The bottom surface of the image stabilization motor 2 is glued to the top surface of the base 1. The image stabilization motor 2 can be a common motor structure in cameras, such as a voice coil motor. A voice coil motor capable of three-axis movement can be selected to drive the movement of the lens 3 to achieve autofocus and focusing. The image stabilization motor 2 typically includes a housing, an electromagnetic assembly installed inside the housing, and a carrier located inside the electromagnetic assembly. The housing includes a motor bracket, an outer shell, and a secondary circuit board. Light inlets are coaxially formed on the motor bracket, outer shell, and circuit board. The lens 3 is mounted in the light inlet via the carrier. The electromagnetic assembly is installed between the motor bracket and the outer shell. The secondary circuit board is used to electrically connect to the imaging component 4 to provide electrical signals to the electromagnetic assembly. The electromagnetic assembly typically includes magnets, coils, etc. The specific structure is based on existing technology. This invention does not improve the image stabilization motor 2; it only needs to ensure the electrical connection between the image stabilization motor 2 and the imaging component 4, which will not be detailed here.

[0025] The image stabilization motor 2 has welding holes on each side wall. The imaging component 4 has an extension that surrounds the base 1 and corresponds to one of the welding holes. The extension has multiple welding grooves. The image stabilization motor 2 is connected to the chip holder 14 after being connected to the top surface of the base 1, so that the chip holder 14 and the image stabilization motor 2 support each other. Since the effective light will have a larger emission range closer to the imaging component 4 after being reflected by the steering optical element 5, a U-shaped clearance notch 21 is formed on the side of the image stabilization motor 2 close to the imaging component 4 to avoid blocking part of the effective light. This clearance notch is used to avoid the effective light and allow the effective light to be directed towards the imaging component 4.

[0026] Please see Figure 3 and Figure 5 Lens 3 typically includes a frame and four lenses mounted within the frame, which is then mounted on a motor mount. The four lenses consist of convex and concave lenses. The convex lenses converge light, while the concave lenses eliminate chromatic aberration and distortion. Together, they optimize image quality and provide optical correction. The specific number of convex and concave lenses is determined based on actual requirements.

[0027] The side of the lens frame facing the steering optical element or base along the light-inlet direction is defined as the light-outlet side, and the light is emitted from the light-outlet side after passing through each lens. In order to reduce the formation of stray light in the gap between the lens 3 and the steering optical element 5, a suspended blocking protrusion 31 is extended on the light-outlet side facing the steering optical element 5. The blocking protrusion 31 is mounted on the image stabilization motor 2. After the image stabilization motor 2 is mounted on the top surface of the base 1, the blocking protrusion 31 blocks the gap between the light-outlet side of the lens 3 and the steering optical element 5, thereby blocking part of the stray light reflection and reducing stray light formation.

[0028] In one embodiment, the blocking protrusions 31 are symmetrically distributed on both sides of the light-emitting side parallel to the light-emitting direction, thereby blocking light from hitting the side of the steering optical element 5 away from the imaging assembly 4. Another blocking protrusion 31 is located on the side closer to the imaging assembly 4 to prevent light from directly hitting the imaging assembly 4 and affecting the emitted light from the steering optical element 5. The two blocking protrusions 31 extend towards the steering optical element 5 along the light-inlet direction and are inclined towards each other, gradually narrowing towards the steering optical element 5, thereby reducing the range of light emitted from the lens 2 to a certain extent and reducing stray light formation. A clearance cavity is provided between the steering optical element 5 and the inclined groove 152, directly opposite the blocking protrusion 31 away from the imaging assembly 4. The blocking protrusion 31 is located above or inside the clearance cavity and spaced apart from it, thus suspending the blocking protrusion 31 above the clearance cavity and above the entire periscope camera module. In another embodiment, the blocking protrusion 31 may also protrude around the light-emitting side of the lens frame in a ring arrangement.

[0029] Please see Figures 1 to 3The imaging component 4 includes a main circuit board 41 with several electronic components, a photosensitive chip 42 electrically connected to the main circuit board 41, a filter 43 mounted on a chip holder 14, and a connector 44 electrically connected to the main circuit board 41. The main circuit board 41 is used for signal processing and transmission. By integrating signal processing modules such as amplification, filtering, and noise reduction, it performs preliminary processing on the electrical signals converted by the photosensitive chip 42 to ensure image quality. By integrating different electronic components, it supports algorithms such as automatic exposure, automatic white balance, and color correction to improve image restoration accuracy. It converts the processed electrical signals into digital signals and transmits them to storage or display devices to achieve image storage, editing, and display. The photosensitive chip 42 converts the light signal converged by the lens 3 into an electrical signal through photoelectric conversion, achieving preliminary acquisition of image data. The filter 43 is used to filter out unwanted spectral components or interfering light in the incident light, reducing interference components in the background, improving the contrast between the target and the background, and improving the signal-to-noise ratio of the system. Connector 44 is used for signal transmission and power supply, transmitting images, sounds and other data captured by the camera module to the processing device, while also enabling bidirectional transmission of control commands.

[0030] In this embodiment, the main circuit board 41 is connected to the chip bracket 14 and blocks the light outlet 173, and can be bonded with glue.

[0031] The photosensitive chip 42 is mounted on the side of the main circuit board 41 facing the light outlet 173 and located within the light outlet 173. The photosensitive chip 42 forms a second preset angle with the light outlet direction, or the main circuit board 41, the photosensitive chip 42, and the filter 43 all have a second preset angle with the light outlet direction. The second preset angle is 45° minus the absolute value of the first preset angle. As an imaging component, the second preset angle of the photosensitive chip 42 with the light inlet direction must be related to the aforementioned first preset angle to ensure imaging effect. Therefore, in this solution, the second preset angle is set to the absolute value of 45° minus the first preset angle. When the second preset angle is not 0, that is, the photosensitive chip 42 is tilted relative to the thickness direction, which reduces the height of the photosensitive chip 42 in the thickness direction, thereby reducing the overall height of the periscope camera module.

[0032] The filter 43 is mounted on the chip holder 14. To ensure the mounting of the filter 43 while preventing light leakage, a square inner frame 142 is formed inside the inner opening 141. The inner frame 142 is parallel to the bonding surface 12 and has an opening on its inner side. A light-absorbing material can be coated on the inner walls of the inner frame 142 and the light outlet 173 to reduce stray light and light leakage, while the effective light passes through the inside of the inner frame 142. The filter 43 is connected to the side of the inner frame 142 facing the mounting cavity 11, while the photosensitive chip 42 is located on the side of the inner frame 142 facing away from the mounting cavity 11, so that the edge of the inner frame 142 blocks the edge of the photosensitive chip 42 to prevent the emitted light from reaching the chip edge and causing light leakage.

[0033] Please see Figure 2 and Figure 3 The steering optical element 5 is a plane mirror, which also functions as a reflector. The use of a plane mirror not only reduces cost but also effectively decreases the length, facilitating thinner and lighter designs. The plane mirror reflects light from the incoming direction and projects it outwards in the outgoing direction. The angle between the incoming and outgoing directions is less than 180°. Therefore, after reflection from the steering optical element 5, the light is directed towards the filter 43 and the photosensitive chip 42 within a certain range. Light directly projected onto the photosensitive chip 42 from the steering optical element 5 is effective light, while light projected outside the photosensitive chip 42 is ineffective light, or light that has been partially reflected multiple times before reaching the photosensitive chip 42 is also ineffective light. In another embodiment, the steering optical element 5 can be a prism.

[0034] Please see Figures 2 to 4 as well as Figure 6 The shielding wall 6 includes a shielding wall 61 formed in the mounting cavity 11 and located between the steering optical element 5 and the imaging assembly 4, a step portion 62, a first light-shielding sheet 63 disposed on the side of the shielding wall 61 near the imaging assembly 4 and used to block stray light, a second light-shielding sheet 64 disposed between the shielding wall 61 and the imaging assembly 4, and a substrate 65 laid on the bottom surface of the mounting cavity 11.

[0035] To facilitate the arrangement of space within the mounting cavity 11, two baffles 61 are formed, symmetrically protruding towards each other on the inner walls of both sides of the mounting cavity 11 along its width. Both baffles 61 are sheet-like structures arranged at intervals, dividing the mounting cavity 11 into a light-entry area 111 facing the lens 3 and a light-exit area 112 near the imaging assembly 4. A light-exit channel 611 is formed between the two baffles 61 on the side of the light-exit area 112 closest to the steering optical element 5, allowing light to travel along the light-exit direction from the steering optical element 5 to the imaging assembly 4. A first light-shielding plate 63 is located at the light-exit channel 611, allowing light to travel from the light-exit channel 611 between the two baffles 61 to the light-exit area 112. The side of the baffle 61 facing the imaging assembly 4 is defined as a connecting surface. A shielding protrusion 31 near the imaging assembly 4 is located within the light-exit area 112 after the image stabilization motor 2 and lens 3 are installed.

[0036] An indentation is formed by connecting the inclined groove 152 and the light exit channel 611 on the side away from the lens 3, and a step portion 62 is formed within the indentation. The step portion 62 has a shielding surface 621 for blocking stray light. A light-shielding layer is coated on the shielding surface 621, that is, an anti-light material is sprayed or attached to the shielding surface 621 to eliminate invalid light from the bottom side of the steering optical element 5 and prevent invalid light from being reflected after hitting the step portion 62 to form stray light.

[0037] The first light-shielding plate 63 is located within the light-emitting area 112 and is connected to a connecting surface of the baffle wall 61 in a frame shape. Therefore, a first light-emitting port 631 is formed inside the first light-shielding plate 63 for the effective light reflected from the steering optical element 5 to pass through and be directed towards the imaging assembly 4. The first light-emitting port 631 is located within the light-emitting channel. The distribution range of the first light-emitting port 631 is adapted to the effective light emitted from the steering optical element 5 to block ineffective light that cannot directly reach the photosensitive chip 42. The first light-shielding plate 63 is connected to the baffle wall 61 via its edge portion located at the first light-emitting port 631. The stepped portion 62 is slightly lower than the bottom side of the first light-emitting port 631 to ensure the light-shielding effect of the first light-shielding plate 63. The first light-shielding plate 63 can be made of a light-shielding material, or other materials can be used with a matte coating such as matte paint to achieve the light-shielding effect. For ease of installation, the connection port 13 is flush with the inner wall of the light-emitting area 112, so that the first light-shielding sheet 63 can be installed in the light-emitting area 112 along the length direction, so that the external suction cup can pick up the first light-shielding sheet 63 and move it to the baffle wall 61.

[0038] The second light-shielding plate 64 is disposed between the first light-shielding plate 63 and the chip holder 14 within the light-emitting area 112. The shape of the second light-shielding plate 64 is similar to that of the first light-shielding plate 63, and its inner side also has a second light-emitting port 641 for effective light to pass through. To ensure the light-shielding effect of the second light-shielding plate 64, a light-shielding material can also be coated on the surface of the second light-shielding plate 64 to eliminate stray light. A blocking protrusion 31, close to the imaging component 4, is located between the first light-shielding plate 63 and the second light-shielding plate 64 and faces the top side of the first light-shielding plate 63 along the light-emitting direction, thereby blocking stray light in the light-emitting area 112 to a certain extent without blocking the passage of effective light.

[0039] In this embodiment, the second light-shielding plate 64 is closer to the imaging component 4 than the first light-shielding plate 63. During the propagation of light, due to the reflection of light by the mirror, the range of light gradually expands when it hits the imaging component 4. Therefore, in order to ensure the passage of effective light, the size of the second light-exit port 641 of the second light-shielding plate 64, which is closer to the imaging component 4, is larger than the size of the first light-exit port 631 so that the effective light that gradually expands during the emission process can pass through in sequence. Correspondingly, the overall height of the second light-shielding plate 64 is also greater than that of the first light-shielding plate 63. However, there is a clearance between the first light-shielding plate 63 and the second light-shielding plate 64 and the image stabilization motor 2 to allow the lens to move and focus, so as not to affect the operation of the image stabilization motor 2 and the lens 3, but in terms of shape, it can block light to the greatest extent.

[0040] To facilitate the suction cup pickup and installation of the first light-shielding plate 63, the second light-shielding plate 64 is inserted into the light-emitting area 112 along the height direction. Correspondingly, slots penetrating the top side of the base 1 along the height direction are recessed on both sides of the light-emitting area 112 along the width direction (i.e., on the inner walls of both sides perpendicular to the height direction). The two sides of the second light-shielding plate 64 are inserted into the two slots 16. The slots 16 are spaced apart relative to the baffle 61 along the width direction (i.e., the light-emitting direction) towards the imaging component 4, so that the height of the second light-shielding plate 64 can be increased according to the space, and further so that the second light-shielding plate 64 blocks stray light that the first light-shielding plate 63 fails to block after being installed in the slots 16. Thus, when the first light-shielding plate 63 is installed, the second light-shielding plate 64 is not installed. The first light-shielding plate 63 can move linearly under the drive of the suction cup and the machine. If the second light-shielding plate 64 is also equipped with a baffle 61, the baffle 61 will block the machine and affect the installation of the first light-shielding plate 63. The slot 16 not only facilitates the installation of the second light-shielding plate 64, but also facilitates the installation of the first light-shielding plate 63. In order to improve the firmness of the second light-shielding plate 64, protrusions 66 are provided on both sides of the second light-shielding plate 64 to abut against the wall of the slot 16. The protrusions 66 are formed by stamping, with one side protruding and the other side recessed. A matting surface is provided on the bottom surface of the light-emitting area 112 away from the lens 3 along the height direction. In order to avoid the waste of matting material, the matting surface is formed on the film 65, reducing the process of spraying matting material. The installation of the film 65 is also simpler. Therefore, the processing efficiency can be improved to a certain extent. The film 65, the first light-shielding plate 63 and the second light-shielding plate 64 can all be steel sheets. In another embodiment, the bottoms of the first light-shielding sheet 63 and the second light-shielding sheet 64 are both supported on the substrate 65.

[0041] The periscope camera module of this utility model operates as follows: light passes through the lens 3 and is focused onto the steering optical element 5 along the light-incoming direction. The steering optical element 5 reflects the light and emits it at a certain angle along the light-out direction. The light passes through the light-out channel 611 and is sequentially emitted onto the filter 43 and the photosensitive chip 42. After being processed by the main circuit board 41, an electrical signal is output for image processing. Invalid light is absorbed by the shielding surface 621 on the step portion 62, and by the first light-shielding plate 63, the second light-shielding plate 64, and the film 65.

[0042] Compared with the prior art, the periscope camera module of this utility model has a blocking protrusion 31 used to eliminate some stray light on the light-emitting side of the lens 3, a step 62 used to eliminate front-end stray light near the side of the turning optical element 5, and block some ineffective light. The first light-blocking plate 63 and the second light-blocking plate 64 cooperate with each other to block stray light in front and behind in the light-emitting area 112 according to the optical path arrangement and shape adjustment, thereby blocking stray light at different heights and positions as much as possible, eliminating the formation of stray light, and optimizing the light effect. The film 65 effectively eliminates stray light reflection, making the reflectivity less than 0.5%.

Claims

1. A periscope camera module, comprising a base having an internal mounting cavity, a stabilization motor mounted on the base, a lens mounted on the stabilization motor and facing the mounting cavity, an imaging assembly mounted on the base, and a steering optical element, wherein light is incident from the lens along the light-incident direction to the steering optical element and then incident along the light-out direction to the imaging assembly; characterized in that: The lens has a light-emitting side facing the steering optical element, and a blocking protrusion protruding from the light-emitting side facing the steering optical element is suspended and used to block stray light.

2. The periscope camera module as described in claim 1, characterized in that: The shielding protrusions are symmetrically distributed on both sides of the light-emitting side, parallel to the light-emitting direction; the two shielding protrusions extend toward the steering optical element along the light-inlet direction and are inclined toward each other.

3. The periscope camera module as described in claim 2, characterized in that: The mounting cavity is provided with at least one shielding wall that blocks stray light when light is directed toward the imaging component; the mounting cavity has a light-emitting area close to the imaging component, and the shielding wall includes a first light-shielding sheet installed in the light-emitting area and coated with a light-absorbing material; the first light-shielding sheet has a first light-emitting port that allows effective light directed toward the imaging component to pass through.

4. The periscope camera module as described in claim 3, characterized in that: One of the shielding protrusions is located within the light-emitting area.

5. The periscope camera module as described in claim 3, characterized in that: The shielding wall also includes a second light-shielding plate installed in the light-emitting area and spaced apart from the first light-shielding plate along the light-emitting direction. The second light-shielding plate has a second light-emitting port for effective light to pass through. The surface of the second light-shielding plate is coated with a light-absorbing material, and the second light-shielding plate is closer to the imaging component than the first light-shielding plate. The size of the second light-emitting port is larger than the size of the first light-emitting port so that the effective light, which gradually expands during the emission process, can pass through sequentially.

6. The periscope camera module as described in claim 3 or 5, characterized in that: The light-emitting area has a connecting surface facing the imaging component along the light-emitting direction, and the first light-shielding plate is connected to the connecting surface; a baffle is formed on the side of the light-emitting area close to the steering optical element, the connecting surface is formed on the side of the baffle facing the imaging component, and a light-emitting channel is formed on the baffle along the light-emitting direction, and the first light-emitting port is located inside the light-emitting channel.

7. The periscope camera module as described in claim 5, characterized in that: The second light-shielding plate is inserted into the light-emitting area along the height direction; the light-emitting area has slots recessed on both inner walls perpendicular to the height direction, which penetrate one side of the base along the height direction, and both sides of the second light-shielding plate have protrusions for abutting against the slots.

8. The periscope camera module as described in claim 5, characterized in that: The second light-blocking plate is higher than the first light-blocking plate, and there is a clearance between the first light-blocking plate, the second light-blocking plate and the image stabilization motor for lens movement and focusing. An obstacle clearance notch is formed on the side of the image stabilization motor near the imaging component to avoid effective light.

9. The periscope camera module as described in claim 3, characterized in that: The light-emitting area has a matte surface on its bottom surface away from the lens along the height direction; the shielding wall also includes a film laid on the bottom surface, and the matte surface is formed on the film.

10. The periscope camera module as described in claim 2, characterized in that: The mounting cavity has an inclined surface facing the lens and tilted relative to the lens. An inclined groove for mounting a steering optical element is formed on the inclined surface. The steering optical element includes a reflector disposed in the inclined groove. Between the reflector and the inclined groove is a clearance cavity that faces and avoids a blocking protrusion.

Images