Periscope camera module

Abstract

The utility model relates to optical technology field discloses a kind of periscopic camera module of mirror, including including the base with a installation cavity inside, the anti-shake motor being installed on base, the lens being installed on anti-shake motor and facing installation cavity, the imaging assembly being installed on base and the turning optical element, light is along light entrance direction from lens to the turning optical element after light exit direction and is shot to imaging assembly;The installation cavity is provided with shielding portion, and the shielding portion has for when light is shot to imaging assembly upper light shielding surface, side light shielding surface and lower light shielding surface for shielding stray light.The utility model is by being provided with shielding portion in installation cavity, can make effective light shot to imaging assembly simultaneously, by upper light shielding surface, lower light shielding surface and side light shielding surface from each position shielding and absorbing stray light, avoid light and form stray light to be shot to imaging assembly outside, to effectively reduce the stray light passing, reduce the formation of stray light, optimize light effect.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a reflective 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 reflective periscope camera module consists of a base, a steering optics element (reflector), a lens, an image stabilization motor, an image sensor, and a circuit board. The image sensor and circuit board constitute the imaging component. The steering optics element is responsible for changing the direction of the light path, enabling high zoom magnification without increasing the device's thickness, meeting the demands of modern thinner and lighter devices. However, during light reflection, because light passes through the lens at different positions, different light rays are directed towards different locations on the steering optics element. Some outgoing light located at the edge of the outgoing light is outside the imaging component's illumination range and is directed elsewhere, becoming stray light. This stray light is reflected by the inner wall of the base, causing 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 reflective periscope camera module to solve the problem of excessive stray light after the light is reflected by the turning optical element.

[0005] To solve the above-mentioned technical problems, the present invention provides a reflective periscope camera module comprising a base having an internal mounting cavity, a stabilizing motor mounted on the base, a lens mounted on the stabilizing motor and facing the mounting cavity, an imaging component mounted on the base, and a steering optical element. 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 component. A shielding part is provided inside the mounting cavity, and the shielding part has an upper light-shielding surface, a side light-shielding surface, and a lower light-shielding surface for blocking stray light when the light is incident on the imaging component.

[0006] Furthermore, the mounting cavity has a light-emitting area close to the imaging component, and the shielding part includes a first light-shielding sheet installed in the light-emitting area and coated with a light-absorbing material. The surface of the first light-shielding sheet is configured as a first side light-shielding surface. The first light-shielding sheet has a first light-emitting port that allows effective light directed toward the imaging component to pass through.

[0007] Furthermore, the first light-shielding sheet is bent on one side near the lens and extends towards the imaging component along the light-emitting direction to form an extension sheet, the surface of which is restricted to the upper light-shielding surface.

[0008] Furthermore, the shielding portion 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 configured as a second side light-shielding surface. The second light-shielding plate is closer to the imaging component than the first light-shielding plate. The first side light-shielding surface and the second side light-shielding surface are jointly configured as the side light-shielding surface. The size of the second light-emitting port is larger than the size of the first light-emitting port so that the effective light that gradually expands during the emission process can pass through sequentially. The extension plate extends toward the second light-emitting port and toward the side of the image stabilization motor.

[0009] 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.

[0010] Furthermore, the second light-shielding sheet 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 the two sides of the second light-shielding sheet are inserted into the two slots.

[0011] Furthermore, both sides of the second light-shielding sheet are provided with protrusions for abutting against the slot.

[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 to allow the lens to move and focus.

[0013] Furthermore, the light-emitting area has an anti-glare surface on its bottom surface away from the lens along the height direction; the blocking part includes a film laid on the bottom surface, the anti-glare surface is formed on the film, and the surface of the film is configured as the lower anti-glare surface.

[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.

[0015] The reflective periscope camera module of this utility model has at least the following beneficial effects: By setting a shielding part in the mounting cavity, this utility model can ensure that the effective light is directed to the imaging component, while the upper shielding surface, lower shielding surface and side shielding surface block and absorb stray light from various positions, preventing the light from being directed outside the imaging component and forming stray light, thereby effectively reducing the stray light passing through, reducing the formation of stray light, and optimizing the light effect. 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 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 structural schematic diagram of the reflector-type periscope camera module of this utility model; Figure 2 This is a half-sectional schematic diagram of the reflector-type periscope camera module of this utility model; Figure 3 for Figure 2 An enlarged view of part A shown; Figure 4 This is an exploded view of the reflector-type periscope camera module of this utility model; Figure 5 for Figure 4 An enlarged view of part B shown; Figure 6 This is a schematic diagram of the cooperative structure of the base, reflector, and shielding part of this utility model; Figure 7 This is a schematic diagram of the structure of the base of this utility model; Figure 8 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, imaging assembly 4, main circuit board 41, photosensitive chip 42, filter 43, connector 44, steering optical element 5, shielding part 6, barrier wall 61, light outlet channel 611, step part 62, light shielding surface 621, first light shield 63, first light outlet 631, extension piece 632, 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 4 The reflective periscope camera module of this invention includes a base 1 with an internal mounting cavity 11, a stabilizing motor 2 mounted on the base 1, a lens 3 mounted on the stabilizing 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 part 6 formed within the mounting cavity 11. The base 1 supports the stabilizing motor 2, the steering optical element 5, and the imaging assembly 4. The stabilizing 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 part 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 2 , Figure 6 and Figure 7 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. 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 2 , Figure 4 and Figure 8 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 reflective 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 Figure 1 , Figure 2 and Figure 4The 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 has 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 closest 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 2 and Figure 4 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] Please see Figure 1 , Figure 2 and Figure 4The 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Please see Figures 2 to 6 as well as Figure 7 The shielding part 6 includes a barrier 61 formed in the mounting cavity 11 and located between the steering optical element 5 and the imaging assembly 4, a step part 62, a first light shield 63 disposed on the side of the barrier 61 near the imaging assembly 4 and used to shield stray light, a second light shield 64 disposed between the barrier 61 and the imaging assembly 4, and a substrate 65 laid on the bottom surface of the mounting cavity 11.

[0033] 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 and are arranged at intervals. The baffles 61 divide 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. The baffles 61 are positioned on the side of the light-exit area 112 closer to the steering optical element 5. Between the two baffles 61, a light-exit channel 611 is formed, allowing light to travel from the steering optical element 5 to the imaging assembly 4 along the light-exit direction. The first light-shielding plate 63 is located at the light-exit channel 611, and light travels 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.

[0034] 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 light-shielding surface 621 for blocking stray light. A light-shielding layer is coated on the light-shielding surface 621, that is, an anti-light material is sprayed or attached to the light-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.

[0035] 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 plate 63 can be installed along its length within the light-emitting area 112, allowing an external suction cup to pick up the first light-shielding plate 63 and move it to the baffle wall 61. The surface of the first light-shielding plate 63 is configured as a first side light-shielding surface. This first side light-shielding surface allows light to travel from the first light-emitting port 631 to the imaging component 4, while stray light directly shining outside the imaging component 4 is blocked by the first light-shielding plate 63 surrounding the first light-emitting port 631, thereby limiting the light emission range and ensuring effective light transmission.

[0036] The first light-shielding plate 63 is bent on one side near the lens and extends towards the imaging component 4 along the light-emitting direction to form an extension plate 632. The extension plate 632 is integrally formed with the first light-shielding plate 63 and can also achieve the light-absorbing and light-shielding effect by using light-shielding material or spraying light-shielding material. The surface of the extension plate 632 is restricted to the upper light-shielding surface, thereby blocking the effective light range after the light is emitted from the first light outlet 631, so as to block stray light from the top near the lens 3.

[0037] 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. The surface of the second light-shielding plate 64 is designated as the second side light-shielding surface, and the first side light-shielding surface and the second side light-shielding surface are configured together as a side light-shielding surface. 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. The extension plate 632 extends toward the side of the second light outlet 641 close to the anti-shake motor, thereby ensuring that the extension plate 632 is at the edge of the effective light dispersion range, thus effectively blocking stray light and ensuring the normal emission of effective light.

[0038] In this embodiment, the second light-shielding plate 64 is closer to the imaging component 4 than the first light-shielding plate 63. During light propagation, the light range gradually expands as it approaches the imaging component 4 due to reflection by the mirror. Therefore, to ensure effective light transmission, 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 first light-exit port 631 to allow the gradually expanding effective light to pass through sequentially. 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 for lens movement and focusing, thus not affecting the operation of the image stabilization motor 2 and the lens 3, while maximizing light blocking in terms of shape. Correspondingly, the extension plate 632 is inclined relative to the bottom surface of the mounting cavity 11 towards the image stabilization motor 2.

[0039] 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 and is configured as the lower light-shielding surface to block stray light from the bottom, reduce the process of spraying matting material, and the installation of the film 65 is also simpler. Therefore, the processing efficiency can be improved to a certain extent. The substrate 65, the first light-shielding plate 63, and the second light-shielding plate 64 can all be made of steel sheets. In another embodiment, the bottoms of both the first light-shielding plate 63 and the second light-shielding plate 64 are supported on the substrate 65.

[0040] The working method of one embodiment of the reflector-type periscope camera module of this utility model is as follows: light passes through the lens 3 along the light-incoming direction and is focused on the steering optical element 5. After the steering optical element 5 reflects the light, it is emitted at a certain angle along the light-out direction and passes through the light-out channel 611 to be directed to the filter 43 and the photosensitive chip 42 in sequence. After being processed by the main circuit board 41, an electrical signal is output for image processing. Invalid light is absorbed by the light-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.

[0041] Compared with the prior art, the reflector-type periscope camera module of this utility model has a stepped part 62 used to eliminate stray light at the front end near the side of the turning optical element 5 and block some of the invalid light. The first light-shielding plate 63 and the second light-shielding 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 reflective 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 mounting cavity is provided with a shielding part, which has an upper light-shielding surface, a side light-shielding surface and a lower light-shielding surface for blocking stray light when light is directed toward the imaging component.

2. The reflector-type periscope camera module as described in claim 1, characterized in that: The mounting cavity has a light-emitting area close to the imaging component. The shielding part includes a first light-shielding sheet installed in the light-emitting area and coated with a light-absorbing material. The surface of the first light-shielding sheet is configured as a first side light-shielding surface. The first light-shielding sheet has a first light-emitting port that allows effective light directed toward the imaging component to pass through.

3. The reflector-type periscope camera module as described in claim 2, characterized in that: The first light-shielding sheet is bent on one side near the lens and then extends towards the imaging component along the light-emitting direction to form an extension sheet, the surface of which is restricted to the upper light-shielding surface.

4. The reflective periscope camera module as described in claim 3, characterized in that: The shielding part further 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 is configured as a second side light-shielding surface. The second light-shielding plate is closer to the imaging component than the first light-shielding plate. The first side light-shielding surface and the second side light-shielding surface are jointly configured as the side light-shielding surface. The size of the second light-emitting port is larger than the size of the first light-emitting port so that the effective light that gradually expands during the emission process can pass through sequentially. The extension plate extends toward the second light-emitting port and toward the side of the image stabilization motor.

5. The reflector-type periscope camera module as described in claim 3 or 4, 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.

6. The reflective periscope camera module as described in claim 4, characterized in that: The second light-shielding sheet 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 the two sides of the second light-shielding sheet are inserted into the two slots.

7. The reflector-type periscope camera module as described in claim 6, characterized in that: The second light-shielding sheet has protrusions on both sides for abutting against the slot.

8. The reflector-type periscope camera module as described in claim 4, 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 to allow the lens to move and focus.

9. The reflector-type periscope camera module as described in claim 2, characterized in that: The light-emitting area has an anti-light surface on its bottom surface away from the lens along the height direction; the blocking part includes a film laid on the bottom surface, the anti-light surface is formed on the film, and the surface of the film is configured as the lower anti-light surface.

10. The reflective periscope camera module as described in claim 1, characterized in that: 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.

Images