A camera module and an assembling method of the camera module

Abstract

The application discloses a camera module and an assembling method thereof. The camera module comprises a first reflection assembly, a first lens assembly and a second reflection assembly. The first reflection assembly comprises a first reflection element and a first support. The first reflection element is used for reflecting light propagating along a first direction to propagate along a second direction. The first support has a first surface. The second reflection assembly comprises a second reflection element and a second support. The second reflection element is used for reflecting light propagating along the second direction to propagate along the first direction. The second support has a second surface. The second surface is arranged opposite to the first surface along the second direction. The first lens assembly has a third surface and a fourth surface. An adjustment gap is formed between the third surface and the first surface and / or between the fourth surface and the second surface. During assembling of the camera module, the adjustment gap is used for active alignment of the first lens assembly. An included angle between the first direction and the second direction is less than 90°.

Description

Technical Field

[0001] This invention relates to the field of camera module technology, and more particularly to a camera module and a method for assembling the camera module. Background Technology

[0002] With the rapid development of mobile communication technology, portable electronic devices such as smartphones and tablets have become indispensable tools in people's daily lives and work. Camera modules are an essential component of portable electronic devices. As camera module technology further develops, users' demands for camera modules are becoming increasingly sophisticated. Camera modules not only need to meet the requirement of miniaturization, but their image quality also directly affects the user experience.

[0003] In related technologies, the height of a vertical camera module is directly limited by the focal length, making it difficult to meet the design trend of thinner and lighter electronic devices. Traditional periscope camera modules can simultaneously meet the requirements of high zoom and thinness by turning the light path 90° through a reflection module. However, the reflection module and the lens module are usually fixedly assembled, and the relative positions of each optical element depend on the machining accuracy. After the light path is reflected and turned multiple times, the cumulative effect of the manufacturing tolerances of each module leads to significant optical axis alignment deviation and makes it difficult to guarantee image quality. Summary of the Invention

[0004] One object of the present invention is to provide a camera module that improves the assembly precision of the camera module, thereby improving the imaging quality of the camera module.

[0005] Another object of the present invention is to provide a method for assembling a camera module, for assembling the aforementioned camera module.

[0006] To achieve at least one of the above objectives, the technical solution adopted by the present invention is as follows: a camera module, comprising: a first reflective assembly, a first lens assembly, and a second reflective assembly arranged sequentially from the object side to the image side; the first reflective assembly includes a first reflective element and a first bracket for mounting the first reflective element, the first reflective element being used to reflect light propagating in a first direction to propagating in a second direction, the first bracket having a first surface located on the light-emitting side of the first reflective element; the second reflective assembly includes a second reflective element and a second bracket for mounting the second reflective element, the second reflective element being used to reflect light propagating in the second direction to propagating in the first direction, the second bracket having a second surface located on the light-incident side of the second reflective element, the second surface being disposed opposite to the first surface along the second direction; the first lens assembly is used to receive light from the object side to the image side. The light emitted from the first reflecting element continues to propagate along the second direction to the second reflecting element; the first lens assembly has a third surface and a fourth surface arranged opposite to each other along the second direction, and an adjustment gap is formed between the third surface and the first surface, and / or an adjustment gap is formed between the fourth surface and the second surface; when assembling the camera module, the adjustment gap is used for active alignment of the first lens assembly, the relative position of the first lens assembly and the first reflecting element is determined by active alignment, and / or the relative position of the first lens assembly and the second reflecting element is determined by active alignment, so that the optical axis of the first lens assembly, the optical axis of the first light-emitting surface of the first reflecting element, and the optical axis of the second light-incident surface of the second reflecting element coincide; wherein, the first direction is parallel to the height direction of the camera module, and the angle between the first direction and the second direction is less than 90°.

[0007] As a preferred embodiment, the width of the adjustment gap along the second direction is denoted as L, which satisfies the following condition: 10μm≤L≤100μm.

[0008] Preferably, the light undergoes at least two reflections in the first reflective element and at least two reflections in the second reflective element.

[0009] As a preferred embodiment, the first reflective element has a first incident surface, a first reflecting surface, a second reflecting surface, and a first exit surface; the first incident surface and the second reflecting surface are coplanar, and the first incident surface and the second reflecting surface are perpendicular to a first direction; there is an included angle α between the first incident surface and the first reflecting surface, satisfying: α < 45°; the first exit surface is adjacent to the first reflecting surface and the second reflecting surface; light enters the first reflective element from the first incident surface along the first direction, is reflected sequentially by the first reflecting surface and the second reflecting surface, and exits from the first exit surface along the second direction.

[0010] As a preferred embodiment, the included angle α between the first incident surface and the first reflecting surface satisfies: 27°≤α≤39°.

[0011] As a preferred embodiment, the second reflective element has a second incident surface, a third reflecting surface, a fourth reflecting surface, and a second exiting surface; the third reflecting surface and the second exiting surface are coplanar, and the third reflecting surface and the second exiting surface are perpendicular to the first direction; there is an included angle β between the second exiting surface and the fourth reflecting surface, satisfying: β < 45°; the second incident surface is adjacent to the third reflecting surface and the fourth reflecting surface; light enters the second reflective element from the second incident surface along the second direction, is reflected by the third reflecting surface and the fourth reflecting surface in sequence, and exits from the second exiting surface along the first direction.

[0012] As a preferred embodiment, the included angle β between the second emitting surface and the fourth reflecting surface satisfies: 27°≤β≤39°.

[0013] As a preferred embodiment, the first lens assembly includes a first lens group, a first carrier, and a first driving component. The first lens group includes at least one lens. The first carrier has a third surface formed on its surface facing the first reflective component and a fourth surface formed on its surface facing the second reflective component. The first carrier has a first receiving cavity for accommodating the first lens group and the first driving component. The first driving component is used to drive the first lens group to move relative to the first carrier in a second direction.

[0014] As a preferred embodiment, the first carrier has a first side edge located above the optical axis of the first lens group along the height direction of the camera module; the second support has an inclined fifth surface located above the second reflective element along the height direction of the camera module; the first driving assembly has a flexible circuit board extending from the first side edge and attached to the fifth surface; one end of the flexible circuit board away from the first driving assembly extends downward from the fifth surface to be electrically connected to an imaging circuit board located on the light-emitting side of the second reflective element; or, the first driving assembly has a first pin extending from the first side edge; the camera module further includes a driving circuit board attached to the fifth surface, with the first pin electrically connected to the driving circuit board.

[0015] As a preferred embodiment, the first carrier has a third side along the height direction of the camera module, the third side being located below the optical axis of the first lens group; the first driving component has a second pin extending from the third side, which is electrically connected to an imaging circuit board located on the light-emitting side of the second reflective element.

[0016] As a preferred embodiment, the camera module further includes a housing having an accommodating space for accommodating at least a portion of the first reflective component, at least a portion of the first lens component, and at least a portion of the second reflective component; the housing has a first mounting surface and a second mounting surface, the first mounting surface being used to mount the first reflective component to position the first reflective element; the second mounting surface being used to mount the second reflective component to position the second reflective element.

[0017] Preferably, the bottom surface of the housing has a mounting opening, through which light emitted by the second reflective element passes and is received by the photosensitive chip; the first mounting surface is parallel to the second direction, and the first mounting surface and the first reflective component are arranged opposite each other along the height direction of the camera module, so that the first reflective component is mounted on the first mounting surface from top to bottom; the second mounting surface is parallel to the first direction, and the second mounting surface and the second reflective component are arranged opposite each other along the length direction of the camera module, so that the second reflective component is mounted on the second mounting surface from bottom to top through the mounting opening.

[0018] As a preferred embodiment, the camera module further includes a second lens group, which includes at least one lens. The second lens group is located on the light-incident side of the first reflective element, and the optical axis of the second lens group coincides with the optical axis of the first light-incident surface of the first reflective element.

[0019] As a preferred embodiment, the second lens group has positive optical power for focusing light rays.

[0020] As a preferred embodiment, the camera module further includes a second carrier and a second driving component. The second carrier has a second receiving cavity, which accommodates the second lens group and the second driving component. The second driving component is used to drive the second lens group to move relative to the second carrier in a first direction.

[0021] As a preferred embodiment, the camera module further includes an imaging component, which includes an imaging circuit board and a photosensitive chip fixed and electrically connected to the imaging circuit board. The photosensitive chip is located on the light-emitting side of the second reflective element to receive light emitted from the second reflective element and to form an image.

[0022] To achieve at least one of the above objectives, the technical solution adopted by the present invention is: a method for assembling a camera module, used to assemble a camera module as described above, comprising the following steps:

[0023] a. Provide a first reflective element, a first bracket, a second reflective element, and a second bracket; fix the first reflective element to the first bracket to form a first reflective assembly; fix the second reflective element to the second bracket to form a second reflective assembly.

[0024] b. Provide a housing having a first mounting surface, a second mounting surface, and a mounting opening on the bottom surface of the housing, wherein the first reflective component is mounted on the first mounting surface from top to bottom, and the second reflective component is mounted on the second mounting surface from bottom to top through the mounting opening;

[0025] c. A first lens assembly and an imaging assembly are provided, wherein the first lens assembly is placed between the first reflective assembly and the second reflective assembly, such that the third surface of the first lens assembly and the first surface of the first reflective assembly are disposed opposite each other along a second direction, and the fourth surface of the first lens assembly and the second surface of the second reflective assembly are disposed opposite each other along a second direction; the imaging assembly is placed on the light-emitting side of the second reflective assembly; wherein an adjustment gap is provided between the first surface and the third surface, and / or an adjustment gap is provided between the second surface and the fourth surface;

[0026] d. Perform active alignment: based on the imaging result obtained by energizing the imaging component, adjust the position and angle of the first lens component within the adjustment gap; fix the adjusted first lens component to at least one of the housing, the first reflection component, and the second reflection component.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] There is an adjustment gap between the first lens assembly and the first reflective assembly, and / or there is an adjustment gap between the first lens assembly and the first reflective element. When assembling the camera module, the first lens assembly can adjust its position and angle by adjusting the gap, thereby achieving active alignment. This makes the optical axis of the first lens assembly, the optical axis of the first light-emitting surface of the first reflective element, and the optical axis of the second light-incident surface of the second reflective element coincide. This can compensate for the accumulated tolerances of each optical component, which helps to ensure the consistency of the optical axes of each optical component in the camera module, thereby improving the imaging quality of the module and increasing the production yield of the camera module. Attached Figure Description

[0029] Figure 1 This is a perspective view of a camera module according to some embodiments of this application.

[0030] Figure 2 This is a cross-sectional view of a camera module according to some embodiments of this application.

[0031] Figure 3 This is a perspective view of a camera module according to some other embodiments of this application.

[0032] Figure 4 This is a cross-sectional view of a camera module according to some other embodiments of this application.

[0033] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0034] Figure 6 This is a schematic diagram of the internal structure of a camera module with a flexible circuit board according to some embodiments of this application.

[0035] Figure 7 This is a schematic diagram of the internal structure of a camera module with a first pin according to some embodiments of this application.

[0036] Figure 8 This is a schematic diagram of the internal structure of a camera module with a second pin according to some embodiments of this application.

[0037] Figure 9 This is a schematic diagram of the top surface orientation of the housing according to some embodiments of this application.

[0038] Figure 10 This is a schematic diagram of the top surface orientation of the housing according to other embodiments of this application.

[0039] Figure 11 This is a schematic diagram of the bottom surface orientation of the housing according to other embodiments of this application.

[0040] In the figure: 1. Camera module; 10. First reflecting component; 11. First reflecting element; 111. First incident surface; 112. First reflecting surface; 113. Second reflecting surface; 114. First exit surface; 12. First bracket; 121. First surface; 20. First lens assembly; 21. First carrier; 211. First receiving cavity; 212. Third surface; 213. Fourth surface; 214. First side; 215. Second side; 216. Third side; 217. Fourth side; 22. First lens group; 23. First driving component; 231. Flexible circuit board; 23 2. First pin; 233. Second pin; 24. Driver circuit board; 30. Second reflective assembly; 31. Second reflective element; 311. Second incident surface; 312. Third reflective surface; 313. Fourth reflective surface; 314. Second exit surface; 32. Second bracket; 321. Second surface; 322. Fifth surface; 40. Housing; 41. Placement space; 42. First mounting surface; 43. Second mounting surface; 44. Mounting port; 50. Second lens assembly; 51. Second lens group; 60. Imaging assembly; 61. Photosensitive chip; 62. Imaging circuit board; 70. Adjustment gap. Detailed Implementation

[0041] The present invention will now be further described in conjunction with specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0042] In the description of this invention, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0043] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0044] A camera module 1, such as Figures 1-8 As shown, it includes a first reflecting assembly 10, a first lens assembly 20, and a second reflecting assembly 30 arranged sequentially from the object side to the image side. Specifically, as... Figure 2 and Figure 4As shown, the first reflective assembly 10 includes a first reflective element 11 and a first bracket 12 for mounting the first reflective element 11. The first reflective element 11 is used to reflect light propagating in a first direction to propagate in a second direction; in other words, the first reflective element 11 is used to perform a first folding and redirection of the light path. The second reflective assembly 30 includes a second reflective element 31 and a second bracket 32 ​​for mounting the second reflective element 31. The second reflective element 31 is used to reflect light propagating in the second direction to propagate in the first direction; in other words, the second reflective element 31 is used to perform a second folding and restoration of the light path. A first lens assembly 20 is located between the first reflective assembly 10 and the second reflective assembly 30. The first lens assembly 20 is used to receive light emitted from the first reflective element 11, focus the light, and continue to propagate the light along the second direction to the second reflective element 31. The first direction is parallel to the height direction of the camera module 1, and the angle between the first direction and the second direction is less than 90°.

[0045] It can be understood that the first reflective element 11 redirects the direction of light propagation from the first direction to the second direction, and the second reflective element 31 restores the direction of light propagation from the second direction to the first direction, thereby folding the optical path and enabling the camera module 1 to have a longer focal length. Furthermore, since the angle between the first and second directions is less than 90°, the oblique space inside the camera module 1 can be utilized, thereby reducing the height and length dimensions of the camera module 1 based on the folded optical path.

[0046] It is worth mentioning that the periscope camera module in the related technology bends the light path by 90° through the reflection module. Although it can meet the requirements of long zoom and thinness at the same time, its length dimension is relatively large. In other words, the traditional periscope camera module trades "extremely large length dimension" for "extremely small height dimension", which creates new layout problems in many new electronic devices. For example, the narrow body of the vertical small foldable screen phone makes it difficult to place a long periscope camera module. When a long periscope camera module is used in a multi-camera system, it may result in an excessively large decorative area of ​​the electronic device, affecting the aesthetics of the layout on the back of the electronic device.

[0047] In this embodiment, the first reflective element 11 and the second reflective element 31 enable light to be transmitted obliquely and restored in a limited height. This not only gives the camera module 1 a longer focal length but also balances its height and length dimensions. In other words, the camera module 1 has both a smaller length and a smaller height, thus occupying less space on the motherboard. This helps avoid the use of complex stacked motherboards in electronic devices, reducing the overall cost and heat generation risk of the electronic devices.

[0048] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the first support 12 has a first surface 121 located on the light-emitting side of the first reflective element 11 and facing the first lens assembly 20 along the second direction. The second support 32 has a second surface 321 located on the light-incident side of the second reflective element 31, and the second surface 321 is disposed opposite to the first surface 121 along the second direction. The first lens assembly 20 has a third surface 212 and a fourth surface 213 disposed opposite to each other along the second direction, and an adjustment gap 70 is formed between the third surface 212 and the first surface 121, and / or an adjustment gap 70 is formed between the fourth surface 213 and the second surface 321. When assembling the camera module 1, the gap 70 is adjusted for active alignment of the first lens assembly 20. The relative position of the first lens assembly 20 and the first reflective element 11 is determined by active alignment, and / or the relative position of the first lens assembly 20 and the second reflective element 31 is determined by active alignment, so that the optical axis of the first lens assembly 20, the optical axis of the first light-emitting surface of the first reflective element 11, and the optical axis of the second light-incident surface of the second reflective element 31 coincide.

[0049] It should be understood that there is an adjustment gap 70 between the first lens assembly 20 and the first reflective assembly 10, and / or between the first lens assembly 20 and the first reflective element 11. During the assembly of the camera module 1, the first lens assembly 20 can adjust its position and angle through the adjustment gap 70, thereby achieving active alignment. This ensures that the optical axis of the first lens assembly 20, the optical axis of the first light-emitting surface of the first reflective element 11, and the optical axis of the second light-incident surface of the second reflective element 31 coincide. This compensates for the tolerance accumulation caused by multiple reflected light paths and oblique light path propagation, which helps to ensure the consistency of the optical axes of each optical element in the camera module 1. In other words, by setting the adjustment gap 70 and cooperating with the active alignment assembly process, it helps to make the optical system of the camera module 1, composed of the first reflective element 11, the first lens assembly 20, and the second reflective element 31, a coaxial system, thereby improving the imaging quality of the camera module 1 and increasing the production yield of the camera module 1.

[0050] In some embodiments, such as Figure 5 As shown, along the second direction, the width of the adjustment gap 70 is denoted as L, which satisfies: 10μm≤L≤100μm. This provides sufficient adjustment space for the first lens assembly 20 and helps to avoid excessive gaps between components, which would cause the overall structure of the camera module 1 to become loose. This improves the assembly yield and optical performance stability of the camera module 1 and also meets the trend of miniaturization design of the camera module 1.

[0051] Specifically, when the fourth surface 213 of the first lens assembly 20 is bonded to the second surface 321 of the second bracket 32, the width L1 of the adjustment gap 70 between the third surface 212 of the first lens assembly 20 and the first surface 121 of the first bracket 12 along the second direction satisfies: 10μm≤L1≤100μm. Alternatively, when the third surface 212 of the first lens assembly 20 is bonded to the first surface 121 of the first bracket 12, the width L2 of the adjustment gap 70 between the fourth surface 213 of the first lens assembly 20 and the second surface 321 of the second bracket 32 ​​along the second direction satisfies: 10μm≤L2≤100μm. Alternatively, when there is an adjustment gap 70 of width L1 between the third surface 212 of the first lens assembly 20 and the first surface 121 of the first support 12, and there is an adjustment gap 70 of width L2 between the fourth surface 213 of the first lens assembly 20 and the second surface 321 of the second support 32, L1 and L2 satisfy: 10μm≤L1+L2≤100μm.

[0052] In some embodiments, such as Figure 2 As shown, the light undergoes at least two reflections in the first reflective element 11 and at least two reflections in the second reflective element 31, thereby increasing the length of the light path and achieving a longer focal length within a limited space, so that the camera module 1 can balance a longer focal length and a smaller overall size.

[0053] In this embodiment, the light undergoes at least two reflections in the first reflecting element 11 and the second reflecting element 31, respectively. This reduces the size of the first reflecting element 11 and the second reflecting element 31 along the first direction while ensuring that the angle between the first direction and the second direction is less than 90°, thereby reducing the shoulder height of the camera module 1. At the same time, compared with traditional single-reflection prisms, this embodiment enables the light to complete oblique transmission and direction restoration within a limited height through the first reflecting element 11 and the second reflecting element 31. In other words, a longer optical path can be achieved in a smaller physical size, thereby giving the camera module 1 a longer focal length.

[0054] In some embodiments, such as Figure 2 and Figure 4As shown, the first reflecting element 11 has a first incident surface 111, a first reflecting surface 112, a second reflecting surface 113, and a first exiting surface 114. Specifically, the first incident surface 111 is perpendicular to the first direction and is used to receive light. The second reflecting surface 113 is coplanar with the first incident surface 111, that is, the first incident surface 111 and the second reflecting surface 113 are perpendicular to the first direction, which makes the structure of the first reflecting element 11 more compact and helps to reduce the size of the first reflecting element 11 along the first direction. There is an included angle α between the first incident surface 111 and the first reflecting surface 112, which satisfies: α < 45°. This setting ensures that the angle between the light entering the first reflecting element 11 along the first direction and reflected by the first reflecting surface 112 and the first direction is greater than 90°, so that the light can smoothly reach the second reflecting surface 113 for a second reflection. The first exiting surface 114 is adjacent to the first reflecting surface 112 and the second reflecting surface 113 to further reduce the overall size of the first reflecting element 11. The included angle refers to the angle between the vectors through which light rays propagate.

[0055] It can be understood that light enters the first reflecting element 11 from the first incident surface 111 along the first direction, is reflected sequentially by the first reflecting surface 112 and the second reflecting surface 113, and then exits from the first exit surface 114 along the second direction. In other words, after entering the first reflecting element 11, the light first undergoes a first reflection by the first reflecting surface 112, then a second reflection by the second reflecting surface 113, and finally exits from the first exit surface 114 along the second direction. This achieves the conversion of the light propagation direction from the first direction to the second direction, thereby enabling a longer optical path within a limited space.

[0056] In at least one embodiment, the included angle α between the first incident surface 111 and the first reflecting surface 112 satisfies: 27°≤α≤39°. It should be understood that if α<27°, the solid structure between the first incident surface 111 and the first reflecting surface 112 may be too thin, affecting the overall structural strength of the first reflecting element 11 and potentially increasing the processing difficulty and production cost of the first reflecting element 11. If α>39°, it may limit the overall height of the camera module 1. In this embodiment, 27°≤α≤39° ensures that the first reflecting element 11 has good structural strength and manufacturability, while also reducing the size of the first reflecting element 11 along the first direction, thus helping to reduce the overall height of the camera module 1 and meeting the trend of thinner and lighter electronic devices.

[0057] In some embodiments, such as Figure 2 and Figure 4As shown, the second reflective element 31 has a second incident surface 311, a third reflecting surface 312, a fourth reflecting surface 313, and a second exiting surface 314. Specifically, the second incident surface 311 is adjacent to the third reflecting surface 312 and the fourth reflecting surface 313, and is used to receive light. The second exiting surface 314 is perpendicular to the first direction, so that it is positioned opposite to the photosensitive chip 61 of the camera module 1 along the first direction, so that the light emitted from the second exiting surface 314 is received by the photosensitive chip 61 and imaged. The third reflecting surface 312 is coplanar with the second exiting surface 314, that is, the third reflecting surface 312 and the second exiting surface 314 are perpendicular to the first direction, which makes the structure of the second reflective element 31 more compact and helps to reduce the size of the reflective element along the first direction. There is an included angle β between the second exit surface 314 and the fourth reflecting surface 313, satisfying that β < 45°. This arrangement ensures that light rays entering the second reflecting element 31 along the second direction and reflected by the third reflecting surface 312 can smoothly reach the fourth reflecting surface 313 for a fourth reflection. Here, the included angle refers to the angle between the vectors of the main ray propagation.

[0058] It can be understood that light enters the second reflective element 31 from the second incident surface 311 along the second direction, is reflected sequentially by the third reflective surface 312 and the fourth reflective surface 313, and then exits from the second exit surface 314 along the first direction. In other words, after entering the second reflective element 31, the light first undergoes a third reflection by the third reflective surface 312, then a fourth reflection by the fourth reflective surface 313, and finally exits from the second exit surface 314 along the first direction. This achieves the restoration of the light propagation direction from the second direction to the first direction, and provides a longer optical path within a limited space.

[0059] In at least one embodiment, the included angle β between the second emitting surface 314 and the fourth reflecting surface 313 satisfies: 27°≤β≤39°. In this embodiment, 27°≤β≤39° ensures that the second reflecting element 31 has good structural strength and manufacturability, while also reducing the size of the second reflecting element 31 along the first direction. This helps to reduce the overall shoulder height of the camera module 1, thus meeting the trend of thinner and lighter electronic devices.

[0060] In at least one embodiment, the first reflecting element 11 and the second reflecting element 31 satisfy α=β. This allows for symmetrical folding and restoration of the optical path, reducing aberrations such as astigmatism and distortion caused by asymmetrical reflection in the optical system. The light rays incident on the first reflecting element 11 and emitted from the second reflecting element 31 have better parallelism, which is beneficial for matching with the photosensitive chip 61 and improving image quality. It is worth mentioning that when α=β, the first reflecting element 11 and the second reflecting element 31 can adopt the same or similar designs, which helps reduce the types of parts, standardize processing techniques and inspection standards, thereby improving the production efficiency and product consistency of the first reflecting element 11 and the second reflecting element 31. Furthermore, the angular errors of the first reflecting element 11 and the second reflecting element 31 can cancel each other out or compensate for each other, reducing tolerance accumulation and making it easier to achieve coincidence of the optical axis of the first light-emitting surface, the optical axis of the second lens group, and the optical axis of the second light-incident surface.

[0061] In some embodiments, such as Figures 1-4 As shown, the camera module 1 also includes an imaging component 60, which includes an imaging circuit board 62 and a photosensitive chip 61 fixed and electrically connected to the imaging circuit board 62. The photosensitive chip 61 is located on the light-emitting side of the second reflective element 31 to receive the light emitted from the second reflective element 31 and form an image. It should be understood that the light-emitting side of the second reflective component 30, i.e., the lower part of the second reflective component 30 along the first direction, has a large space, which can accommodate the photosensitive chip 61 with a large image area. This is beneficial for the camera module 1 to have a shallower depth of field and better background blur performance under the same focal length, and can also improve the resolution of the camera module 1, thereby meeting various user needs. It is worth mentioning that the imaging component 60 is located at the bottom of the entire camera module 1, which also reduces the installation difficulty of the imaging component 60 and facilitates the connection between the imaging circuit board 62 and external circuits, thereby improving the assembly efficiency of the camera module 1. It is worth mentioning that the photosensitive chip 61 can be mounted on the imaging circuit board 62, or it can be connected to the imaging circuit board 62 by gold wire bonding. This application does not impose any specific restrictions on this.

[0062] In some embodiments, such as Figure 2 and Figure 4As shown, the first lens assembly 20 includes a first lens group 22, a first carrier 21, and a first driving assembly 23. Specifically, the first lens group 22 includes at least one lens capable of refracting and converging light. A third surface 212 is formed on the surface of the first carrier 21 facing the first reflective assembly 10, and the third surface 212 is disposed opposite to the first surface 121 of the first support 12 along a second direction; a fourth surface 213 is formed on the surface of the first carrier 21 facing the second reflective assembly 30, and the fourth surface 213 is disposed opposite to the second surface 321 of the second support 32 along a second direction; furthermore, the first carrier 21 also has a first receiving cavity 211, which accommodates the first lens group 22 and the first driving assembly 23. The first driving assembly 23 is used to drive the first lens group 22 to move relative to the first carrier 21 within the first receiving cavity 211 along a second direction to achieve the function of focusing light.

[0063] It is worth mentioning that the first drive component 23 can be implemented as a voice coil motor, a piezoelectric motor, or a shape memory alloy motor, etc., and this application does not impose specific limitations on it. Furthermore, the first drive component 23 also includes a focusing circuit board, which is used to fix and electrically connect the drive coil of the voice coil motor or the piezoelectric motor, so as to supply power to the drive coil or the piezoelectric motor.

[0064] In some embodiments, such as Figures 6-8 As shown, the first carrier 21 has a first side 214, a second side 215, a third side 216, and a fourth side 217 connected in sequence. Along the height direction of the camera module 1, the first side 214 is located above the optical axis of the first lens group 22, and the third side 216 is located below the optical axis of the first lens group 22. The first side 214 and the second side 215 are arranged opposite to each other. The second side 215 and the fourth side 217 are arranged opposite to each other along the width direction of the camera module 1. Furthermore, the second bracket 32 ​​has an inclined fifth surface 322. Along the height direction of the camera module 1, the fifth surface 322 is located above the second reflective element 31, meaning that the fifth surface 322 is adjacent to the first side 214 of the first carrier 21 along a second direction.

[0065] In some embodiments, such as Figure 6As shown, the first driving component 23 has a flexible circuit board 231; in other words, at least a portion of the focusing circuit board is implemented as a flexible circuit board. Specifically, the flexible circuit board 231 extends from the first side 214 and is attached to the fifth surface 322, which helps to prevent the flexible circuit board 231 from being stretched and causing circuit failure, thereby improving the electrical connection reliability of the camera module 1. Furthermore, one end of the flexible circuit board 231 away from the first driving component 23 extends downward from the fifth surface 322, so as to be electrically connected to the imaging circuit board 62 located on the light-emitting side of the second reflective element 31, and thus conduction to the external circuit through the imaging circuit board 62.

[0066] It is understandable that this arrangement makes the circuitry of the camera module 1 neater and simplifies the connection between the camera module 1 and external circuits. Notably, utilizing the unused fifth surface 322 on the second bracket 32 ​​for electrical wiring helps avoid interference with the main optical path of the camera module 1 and makes the circuit connection design more compact, thereby achieving efficient use of the internal space of the camera module 1. Furthermore, the fifth surface 322 being located above the second bracket 32 ​​reduces the difficulty of attaching the flexible circuit board 231 and improves the assembly efficiency of the camera module 1. In at least one embodiment, the focus control chip of the camera module 1 can be mounted on the imaging circuit board 62, thereby improving the circuit integration of the camera module 1, wherein the focus control chip is used to control the displacement of the first lens group 22 along the second direction.

[0067] In other embodiments, such as Figure 7 As shown, the first driving component 23 has a first pin 232; in other words, the focusing circuit board has a first pin 232. Specifically, the first pin 232 extends from the first side 214. Furthermore, the camera module 1 also includes a driving circuit board 24 attached to the fifth surface 322. The first pin 232 is electrically connected to the driving circuit board 24, and the displacement of the first lens group 22 along the second direction can be controlled through the driving circuit board 24. It should be understood that the separate arrangement of the driving circuit board 24 and the imaging circuit board 62 reduces the density of components on both boards, helps avoid excessive local temperature rise on each circuit board, thereby improving the stability of focusing drive and imaging quality; it also facilitates flexible arrangement of electronic components on the driving circuit board 24 and the imaging circuit board 62.

[0068] It is worth mentioning that the driving circuit board 24 can be electrically connected to the imaging circuit board 62, and thus conduct to the external circuit through the imaging circuit board 62; the driving circuit board 24 can also be directly led out to conduct to the external circuit, and this application does not impose specific restrictions on this.

[0069] In other embodiments, such as Figure 8As shown, the first driving component 23 has a second pin 233; in other words, the focusing circuit board has a second pin 233. Specifically, the second pin 233 extends from the third side 216 and is electrically connected to the imaging circuit board 62 located on the light-emitting side of the second reflective element 31. It should be understood that the third side 216 and the imaging circuit board 62 are arranged adjacent to each other along the second direction. By electrically connecting to the imaging circuit board 62 via the second pin 233, the circuit layout of the camera module 1 can be made more compact and neat, further reducing the overall size of the camera module 1. In addition, shortening the connection line between the focusing circuit board and the imaging circuit board 62 can also reduce the line impedance, thereby driving the first lens group 22 to move along the second direction more stably and quickly. It is worth mentioning that the focusing circuit board is electrically connected to the imaging circuit board 62 via the second pin 233. This short and clearly positioned direct connection method helps to achieve automated soldering, thereby reducing the difficulty and instability of manual operation, and improving the production yield and performance consistency of the camera module 1.

[0070] In at least one embodiment, the first lens group 22 is movable in a plane perpendicular to the second direction to achieve optical image stabilization, thereby further improving the imaging quality of the camera module 1. Furthermore, the driving component has a first pin 232 and a second pin 233, wherein the first pin 232 is soldered to the driving circuit board 24 attached to the fifth surface 322, and the second pin 233 is electrically connected to the imaging circuit board 62 of the imaging component 60; either the first pin 232 or the second pin 233 is used for focusing drive and focusing control, and the other pin 232 or the second pin 233 is used for image stabilization drive and image stabilization control. It should be understood that the first pin 232 and the second pin 233 are located on opposite sides of the first carrier 21. This arrangement ensures that the tension on the first carrier 21 and the first driving component 23 caused by the pin soldering is symmetrical or similar, thereby helping to avoid adhesion failure between the first carrier 21 and other components due to uneven force, and improving the overall reliability of the camera module.

[0071] In at least one other embodiment, optical image stabilization can also be achieved by moving the photosensitive chip 61 in a plane perpendicular to the first direction, and this application does not impose any specific limitations on this.

[0072] In some embodiments, such as Figures 1-4 ,as well as Figures 9-11 As shown, the camera module 1 also includes a housing 40, which has an accommodating space 41 for accommodating at least a portion of the first reflective assembly 10, at least a portion of the first lens assembly 20, and at least a portion of the second reflective assembly 30. Further, as... Figures 9-11As shown, the housing 40 has a first mounting surface 42 and a second mounting surface 43. The first mounting surface 42 is used to mount the first reflective assembly 10 to position the first reflective element 11; the second mounting surface 43 is used to mount the second reflective assembly 30 to position the second reflective element 31.

[0073] It should be understood that the first mounting surface 42 and the second mounting surface 43 can provide precise mechanical pre-positioning to the first reflective component 10 and the second reflective component 30 respectively, so that the first surface 121 of the first bracket 12 and the second surface 321 of the second bracket 32 ​​are arranged opposite to each other along the second direction, and the initial assembly deviation of the first reflective component 10 and the second reflective component 30 is reduced, thereby reducing the adjustment range of subsequent active alignment, which can reduce the assembly difficulty of the camera module 1, improve production efficiency, and also help improve the structural stability of the camera module 1.

[0074] In at least one embodiment, such as Figures 9-11 As shown, the bottom surface of the housing 40 has a mounting opening 44, which extends in a plane perpendicular to the first direction. Light emitted from the second reflective element 31 can pass through the mounting opening 44 and be received by the photosensitive chip 61. Furthermore, the first mounting surface 42 is parallel to the second direction, and the first mounting surface 42 and the first reflective component 10 are arranged opposite each other along the height direction of the camera module 1, so that the first reflective component 10 can be mounted on the first mounting surface 42 from top to bottom; the second mounting surface 43 is parallel to the first direction, and the second mounting surface 43 and the second reflective component 30 are arranged opposite each other along the length direction of the camera module 1, so that the second reflective component 30 can be mounted on the second mounting surface 43 from bottom to top through the mounting opening 44.

[0075] It is understandable that this arrangement allows the first reflective component 10 and the second reflective component 30 to be mounted on the first mounting surface 42 and the second mounting surface respectively from different sides of the housing 40 without interference. This not only improves the structural compactness of the camera module 1 and achieves efficient utilization of three-dimensional space, but also simplifies the assembly process through a clear unidirectional assembly path, which is conducive to achieving automated assembly. In addition, using the integrated housing 40 as the mounting base can shorten the tolerance chain, which helps to avoid the accumulation of tolerances caused by multi-level assembly, thereby helping to ensure the initial alignment accuracy of the optical axis of the first light-emitting surface of the first reflective element 11 and the optical axis of the second light-incident surface of the second reflective element 31.

[0076] In some embodiments, such as Figure 1 and Figure 2As shown, the camera module 1 also includes a second lens group 51, which includes at least one lens. The second lens group 51 is located on the light-incident side of the first reflective element 11, and the optical axis of the second lens group 51 coincides with the optical axis of the first light-incident surface of the first reflective element 11. It should be understood that by setting the second lens group 51, which is separate from the first lens group 22, it is beneficial to achieve a smaller minimum focusing distance, thereby improving the shooting quality of macro scenes.

[0077] In at least one embodiment, the second lens group 51 has positive optical power to focus the light beam, thereby increasing the amount of light entering the camera module 1 without changing the physical aperture of the camera module 1, which is beneficial to improving the imaging quality of the camera module 1. It is worth mentioning that increasing the amount of light entering the camera module 1 is particularly important for improving the imaging quality of the camera module 1 in low-light environments. Furthermore, the light beam focused by the second lens group 51 remains focused after being reflected by the first reflecting element 11, so the required size of the first reflecting element 11 and the first lens group 22 is also smaller, which can further reduce the height and length of the camera module 1, which is beneficial to the miniaturization of the camera module 1 and caters to the development trend of thinner and lighter electronic devices.

[0078] Furthermore, the first lens group 22 has negative optical power to expand the light beam, so that the light propagating in the second direction is expanded after passing through the first lens group 22. It should be understood that by setting the first lens group 22 with the function of expanding the beam, the light beam that is converged by the second lens group 51 is diffused after passing through the first lens group 22, which increases the coverage area of ​​the light reaching the photosensitive chip 61, which helps to avoid the light being concentrated in a very small area, thereby improving the imaging clarity of the camera module 1.

[0079] In some embodiments, the camera module 1 further includes a second carrier and a second driving component. The second carrier has a second receiving cavity for accommodating the second lens group 51 and the second driving component. The second driving component is used to drive the second lens group 51 to move relative to the second carrier along a first direction. The second lens group 51, the second carrier, and the second driving component constitute the second lens assembly 50. It should be understood that by providing two independently movable lens groups—a first lens group 22 that can move independently along the first direction and a second lens group 51 that can move independently along the second direction—aberrations can be dynamically corrected within the focusing range, thereby maintaining sharpness and clarity in the image from near to far. In other words, the camera module 1 can maintain stable and high image quality when shooting close-up and distant scenes. Furthermore, distributing the focusing movement to two lens groups shortens the travel of a single lens group, which helps to further reduce the shoulder height of the camera module 1 and reduce driving power consumption.

[0080] A method for assembling a camera module 1, comprising the steps of:

[0081] a. Provide a first reflective element 11, a first bracket 12, a second reflective element 31, and a second bracket 32, fix the first reflective element 11 to the first bracket 12 to form a first reflective assembly 10, and fix the second reflective element 31 to the second bracket 32 ​​to form a second reflective assembly 30;

[0082] b. Provide a housing 40, which has a first mounting surface 42, a second mounting surface 43, and a mounting opening 44 on the bottom surface of the housing 40. The first reflective component 10 is mounted on the first mounting surface 42 from top to bottom, and the second reflective component 30 is mounted on the second mounting surface 43 from bottom to top through the mounting opening 44.

[0083] c. Provide a first lens assembly 20 and an imaging assembly 60, placing the first lens assembly 20 between the first reflective assembly 10 and the second reflective assembly 30, such that the third surface 212 of the first lens assembly 20 and the first surface 121 of the first reflective assembly 10 are arranged opposite each other along a second direction, and the fourth surface 213 of the first lens assembly 20 and the second surface 321 of the second reflective assembly 30 are arranged opposite each other along a second direction; place the imaging assembly 60 on the light-emitting side of the second reflective assembly 30; wherein, there is an adjustment gap 70 between the first surface 121 and the third surface 212, and / or there is an adjustment gap 70 between the second surface 321 and the fourth surface 213;

[0084] d. Perform active alignment. Based on the imaging result obtained by energizing the imaging component 60, adjust the position and angle of the first lens component 20 within the adjustment gap 70. Fix the adjusted first lens component 20 to at least one of the housing 40, the first reflection component 10, and the second reflection component 30.

[0085] It can be understood that during active alignment, based on the imaging feedback from the photosensitive chip 61, the first lens assembly 20 is driven to move within the adjustment gap 70 until the image sharpness or optical axis consistency reaches its optimal value. Then, the first lens assembly 20 is fixed. This separates mechanical tolerances from optical calibration, compensating for the accumulated tolerances caused by multiple reflected light paths and oblique light path propagation. This helps ensure the consistency of the optical axes of each optical element within the camera module 1. In other words, by setting the adjustment gap 70 and coordinating with the active alignment assembly process, the optical system of the camera module 1, composed of the first reflective element 11, the first lens assembly 20, and the second reflective element 31, becomes a coaxial system, thereby improving the imaging quality of the module and increasing the production yield of the camera module 1.

[0086] The operation of adjusting the position and angle of the first lens includes at least one of the following: moving along the second direction, moving along a direction perpendicular to the second direction, rotating around the second direction, and rotating around a direction perpendicular to the second direction. This application does not impose specific limitations on this.

[0087] It is worth mentioning that the imaging component 60 in step c can be an imaging component 60 dedicated to the active alignment step, or it can be an imaging component 60 installed in the camera module 1. This application does not make any specific restrictions on this.

[0088] In some embodiments, such as Figure 4 and Figure 5 As shown, the adjustment gap 70 is located between the third surface 212 of the first lens assembly 20 and the first surface 121 of the first support 12. The fourth surface 213 of the first lens assembly 20 is bonded to the surface of the second support 32 to facilitate adhesive application. In at least one embodiment, adhesive is first applied between the fourth surface 213 and the second surface 321, then active alignment in step d is performed, and then the adhesive is cured by at least one of visible light, ultraviolet light, and baking. In at least one other embodiment, active alignment in step d is performed first, then adhesive is applied between the fourth surface 213 and the second surface 321, and then the adhesive is cured by at least one of visible light, ultraviolet light, and baking. This application does not specifically limit the order of execution of the active alignment and adhesive application operations.

[0089] The basic principles, main features, and advantages of this invention have been described above. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made without departing from the spirit and scope of the invention, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection claimed by this invention is defined by the appended claims and their equivalents.

Claims

1. A camera module, characterized in that, include: A first reflecting component, a first lens component, and a second reflecting component are arranged sequentially from the object side to the image side; The first reflective assembly includes a first reflective element and a first bracket for mounting the first reflective element. The first reflective element is used to reflect light propagating in a first direction to light propagating in a second direction. The first bracket has a first surface located on the light-emitting side of the first reflective element. The second reflective assembly includes a second reflective element and a second bracket for mounting the second reflective element. The second reflective element is used to reflect light propagating in a second direction to light propagating in a first direction. The second bracket has a second surface located on the light-incident side of the second reflective element. The second surface is disposed opposite to the first surface in the second direction. The light undergoes at least two reflections in the first reflective element, and the light undergoes at least two reflections in the second reflective element; The first reflective element has a first incident surface, a first reflecting surface, a second reflecting surface, and a first exit surface; the first incident surface and the second reflecting surface are coplanar, and the first incident surface and the second reflecting surface are perpendicular to a first direction; there is an included angle α between the first incident surface and the first reflecting surface, satisfying: α < 45°; the first exit surface is adjacent to the first reflecting surface and the second reflecting surface; Light enters the first reflective element from the first incident surface along the first direction, is reflected sequentially by the first reflective surface and the second reflective surface, and exits from the first exit surface along the second direction; The first lens assembly is used to receive light emitted from the first reflective element and to continue to propagate the light along the second direction to the second reflective element; the first lens assembly has a third surface and a fourth surface disposed opposite to each other along the second direction, and an adjustment gap is formed between the third surface and the first surface, and / or an adjustment gap is formed between the fourth surface and the second surface; When assembling the camera module, the adjustment gap is used for the active alignment of the first lens assembly. The relative position of the first lens assembly and the first reflective element is determined by the active alignment, and / or the relative position of the first lens assembly and the second reflective element is determined by the active alignment, so that the optical axis of the first lens assembly, the optical axis of the first light-emitting surface of the first reflective element, and the optical axis of the second light-incident surface of the second reflective element coincide. The first direction is parallel to the height direction of the camera module, and the angle between the first direction and the second direction is less than 90°.

2. The camera module according to claim 1, characterized in that, Along the second direction, the width of the adjustment gap is denoted as L, which satisfies: 10μm≤L≤100μm.

3. The camera module according to claim 1, characterized in that, The included angle α between the first incident surface and the first reflecting surface satisfies: 27°≤α≤39°.

4. The camera module according to claim 1, characterized in that, The second reflective element has a second incident surface, a third reflecting surface, a fourth reflecting surface, and a second exiting surface; The third reflecting surface is coplanar with the second exiting surface, and the third reflecting surface and the second exiting surface are perpendicular to the first direction; there is an included angle β between the second exiting surface and the fourth reflecting surface, satisfying: β < 45°; the second incident surface is adjacent to the third reflecting surface and the fourth reflecting surface; The light enters the second reflective element from the second incident surface along the second direction, and is reflected by the third and fourth reflective surfaces in sequence, before exiting from the second exit surface along the first direction.

5. The camera module according to claim 4, characterized in that, The included angle β between the second exiting surface and the fourth reflecting surface satisfies: 27°≤β≤39°.

6. The camera module according to any one of claims 1-5, characterized in that, The first lens assembly includes a first lens group, a first carrier, and a first driving component. The first lens group includes at least one lens. The first carrier has a third surface formed on the surface facing the first reflective component and a fourth surface formed on the surface facing the second reflective component. The first carrier has a first receiving cavity for accommodating the first lens group and the first driving component. The first driving component is used to drive the first lens group to move relative to the first carrier in a second direction.

7. The camera module according to claim 6, characterized in that, The first carrier has a first side, which is located above the optical axis of the first lens group along the height direction of the camera module; the second bracket has an inclined fifth surface, which is located above the second reflective element along the height direction of the camera module. The first driving component has a flexible circuit board extending from the first side and attached to the fifth surface; one end of the flexible circuit board away from the first driving component extends downward from the fifth surface to be electrically connected to an imaging circuit board located on the light-emitting side of the second reflective element. Alternatively, the first driving component has a first pin that extends from the first side; the camera module further includes a driving circuit board attached to the fifth surface, and the first pin is electrically connected to the driving circuit board.

8. The camera module according to claim 6, characterized in that, The first carrier has a third side along the height direction of the camera module, and the third side is located below the optical axis of the first lens group; the first driving component has a second pin, which extends from the third side and is electrically connected to the imaging circuit board located on the light-emitting side of the second reflective element.

9. The camera module according to any one of claims 1-5, characterized in that, The camera module further includes a housing having an accommodating space for accommodating at least a portion of the first reflective component, at least a portion of the first lens component, and at least a portion of the second reflective component; the housing has a first mounting surface and a second mounting surface, the first mounting surface being used to mount the first reflective component to position the first reflective element; the second mounting surface being used to mount the second reflective component to position the second reflective element.

10. The camera module according to claim 9, characterized in that, The bottom surface of the housing has a mounting opening, through which light emitted by the second reflective element passes and is received by the photosensitive chip; the first mounting surface is parallel to the second direction, and the first mounting surface and the first reflective component are arranged opposite to each other along the height direction of the camera module, so that the first reflective component is mounted on the first mounting surface from top to bottom; the second mounting surface is parallel to the first direction, and the second mounting surface and the second reflective component are arranged opposite to each other along the length direction of the camera module, so that the second reflective component is mounted on the second mounting surface from bottom to top through the mounting opening.

11. The camera module according to any one of claims 1-5, characterized in that, The camera module further includes a second lens group, which includes at least one lens. The second lens group is located on the light-incident side of the first reflective element, and the optical axis of the second lens group coincides with the optical axis of the first light-incident surface of the first reflective element.

12. The camera module according to claim 11, characterized in that, The second lens group has positive optical power for focusing light rays.

13. The camera module according to claim 11, characterized in that, The camera module further includes a second carrier and a second driving component. The second carrier has a second receiving cavity, which accommodates the second lens group and the second driving component. The second driving component is used to drive the second lens group to move relative to the second carrier in a first direction.

14. The camera module according to any one of claims 1-5, characterized in that, The camera module further includes an imaging component, which includes an imaging circuit board and a photosensitive chip fixed and electrically connected to the imaging circuit board. The photosensitive chip is located on the light-emitting side of the second reflective element to receive light emitted from the second reflective element and to form an image.

15. A method for assembling a camera module, used to assemble a camera module as described in any one of claims 1-14, characterized in that, Including the following steps: a. Provide a first reflective element, a first bracket, a second reflective element, and a second bracket; fix the first reflective element to the first bracket to form a first reflective assembly; fix the second reflective element to the second bracket to form a second reflective assembly. b. Provide a housing having a first mounting surface, a second mounting surface, and a mounting opening on the bottom surface of the housing, wherein the first reflective component is mounted on the first mounting surface from top to bottom, and the second reflective component is mounted on the second mounting surface from bottom to top through the mounting opening; c. A first lens assembly and an imaging assembly are provided, wherein the first lens assembly is placed between the first reflective assembly and the second reflective assembly, such that the third surface of the first lens assembly and the first surface of the first reflective assembly are disposed opposite each other along a second direction, and the fourth surface of the first lens assembly and the second surface of the second reflective assembly are disposed opposite each other along a second direction; the imaging assembly is placed on the light-emitting side of the second reflective assembly; wherein an adjustment gap is provided between the first surface and the third surface, and / or an adjustment gap is provided between the second surface and the fourth surface; d. Perform active alignment: based on the imaging result obtained by energizing the imaging component, adjust the position and angle of the first lens component within the adjustment gap according to the imaging result; fix the first lens component after adjustment to at least one of the housing, the first reflection component, and the second reflection component.

Images