Optical axis adjusting mechanism, imaging module and imaging device

Abstract

The utility model discloses an optical axis adjusting mechanism, an imaging module and an imaging device, the optical axis adjusting mechanism comprises a mounting seat, an adapter bracket and an adjusting assembly, the adapter bracket is used for mounting an optical system, and the adjusting assembly is respectively connected with the mounting seat and the adapter bracket; the adjusting assembly comprises an adjusting element and an elastic structure, an adjusting hole is formed in the adapter bracket, the adjusting element penetrates through the adjusting hole and is connected with the mounting seat, the elastic structure is located between the mounting seat and the adapter bracket, and the adjusting element can spirally move relative to the mounting seat; and the adapter bracket moves relative to the mounting seat by extruding the elastic structure or under the elastic force action of the elastic structure. The optical axis is adjusted by rotating the adjusting element, the effect of continuous adjustment can be achieved, repeated disassembly and assembly operation in the adjusting process is avoided, the optical axis can be rapidly adjusted to the corresponding position, the adjusting duration is shortened, and meanwhile the requirement for the proficiency of debugging personnel can be lowered.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging technology, and in particular to an optical axis adjustment mechanism, an imaging module and an imaging device. Background Technology

[0002] With the continuous development of technology, multispectral visual perception technology is increasingly integrated into daily production and life. Optoelectronic products are also gradually moving from single-light mode to dual-light and multi-light mode to obtain richer information and stronger adaptability. For the sake of consistency and convenience of observation, optoelectronic products with dual-light and multi-light modes generally require that the optical axis directions of each optical path system be consistent. Therefore, it is usually necessary to adjust the optical axes of each optical path system to make them parallel to each other.

[0003] Existing methods for adjusting the optical axis typically involve placing shims on the mounting surface of the corresponding device and adjusting the optical axis by replacing shims of different thicknesses or increasing or decreasing the number of shims. Alternatively, the mounting surface can be ground to achieve the same adjustment. However, whether shims are placed or the mounting surface is ground, the process of adjusting the optical axis requires repeated disassembly and reassembly operations for replacement or grinding. This is cumbersome, time-consuming, and does not produce continuous adjustment results. Therefore, it requires a high level of operator proficiency. Utility Model Content

[0004] In view of this, the present invention provides an optical axis adjustment mechanism, an imaging module, and an imaging device to solve the problems that existing optical axis adjustment methods are time-consuming and require a high level of proficiency.

[0005] On one hand, this application provides an optical axis adjustment mechanism, including a mounting base, an adapter bracket, and an adjustment component. The adapter bracket is used to mount an optical system, and the adjustment component is connected to the mounting base and the adapter bracket respectively.

[0006] The adjustment assembly includes an adjustment element and an elastic structure. The adapter bracket is provided with an adjustment hole. The adjustment element passes through the adjustment hole and is connected to the mounting base. The elastic structure is located between the mounting base and the adapter bracket. The adjustment element can perform a spiral movement relative to the mounting base, so that the adapter bracket moves relative to the mounting base by squeezing the elastic structure or under the elastic force of the elastic structure.

[0007] In some embodiments, the elastic structure includes a spring, with both ends of the spring connected to the adapter bracket and the mounting base, respectively; or,

[0008] The elastic structure includes an intermediate element and a mounting portion. One of the adapter bracket and the mounting base is provided with the mounting portion. The intermediate element is located between the mounting portion and the other of the adapter bracket and the mounting base. The mounting portion is provided with a receiving hole for receiving the intermediate element. At least one of the intermediate element and the mounting portion is an elastic element so that the intermediate element can move relative to the receiving hole under the compression action of the adapter bracket.

[0009] In some embodiments, the intermediate element is an elastic element, the intermediate element is annular and has a notch formed in the circumferential direction, at least one of the outer peripheral surface of the intermediate element and the inner peripheral surface of the receiving hole is outwardly flared, and the intermediate element is capable of squeezing the notch or opening the notch to move relative to the receiving hole.

[0010] In some embodiments, the outer peripheral surface of the intermediate element and the inner peripheral surface of the receiving hole are both outwardly flared and mutually adapted.

[0011] In some embodiments, a through hole is formed on the inner side of the intermediate element, the through hole corresponding to the adjustment hole, and one end of the adjustment element passes through the adjustment hole and the through hole and is connected to the mounting base.

[0012] In some embodiments, the inner diameter of the perforation near the adapter bracket is larger than the inner diameter of the perforation away from the adapter bracket, and the inner wall of the perforation is spaced apart from the outer wall of the adjusting element.

[0013] In some embodiments, the mounting portion is located on the side of the mounting base near the adapter bracket and is integrally formed with the mounting base. The mounting base is provided with a threaded hole communicating with the receiving hole. One end of the adjusting element passes through the through hole and is threadedly engaged with the threaded hole.

[0014] In some embodiments, the inner diameter of the adjusting hole is larger than the outer diameter of the portion of the adjusting element located within the adjusting hole, so that the inner wall of the adjusting hole is spaced apart from the outer wall of the adjusting element.

[0015] In some embodiments, a positioning component is further included, the positioning component including a positioning ball and a positioning hole adapted to the positioning ball, the mounting base and / or the adapter bracket having the positioning hole, the positioning ball being received into the positioning hole to restrict the movement of the adapter bracket relative to the mounting base in a direction perpendicular to the optical axis.

[0016] In some embodiments, the positioning component further includes a connector, the adapter bracket has a first through hole, the positioning ball has a second through hole, the connector passes through the first through hole and the second through hole and is connected to the mounting base, and the inner wall of the first through hole is spaced apart from the outer wall of the connector.

[0017] In some embodiments, the adapter bracket is rectangular, the number of adjustment components is three, the number of positioning components is one, and the three adjustment components and the one positioning component are respectively disposed at the four corners of the adapter bracket.

[0018] In some embodiments, the number of adjustment components is multiple, and the multiple adjustment components include at least a first adjustment component, a second adjustment component, and a third adjustment component, wherein the arrangement directions of the first adjustment component and the second adjustment component and the arrangement directions of the first adjustment component and the third adjustment component are perpendicular to each other.

[0019] On the other hand, this application also provides an imaging module, including the optical axis adjustment mechanism and optical system as described above. The optical system is disposed on the side of the adapter bracket away from the mounting base, and the mounting base and the adapter bracket are respectively provided with light-transmitting holes corresponding to the optical system.

[0020] On the other hand, this application also provides an imaging device, including a plurality of imaging modules as described above, wherein the optical axes of the plurality of imaging modules are parallel to each other.

[0021] The optical axis adjustment mechanism provided by this utility model, by setting an elastic structure between the adapter bracket and the mounting base, allows the adjusting element to exert a compressive force on the adapter bracket when it moves spirally relative to the mounting base. This compressive force is transmitted to the elastic structure, causing the elastic structure to deform, thus moving the adapter bracket relative to the mounting base. When the adjusting element moves relative to the mounting base in a tightening manner, the compressive force on the elastic structure increases, and the deformation increases accordingly, causing the adapter bracket to compress the elastic structure and move closer to the mounting base. When the adjusting element moves relative to the mounting base in a loosening manner, the compressive force on the elastic structure decreases, and the adapter bracket moves away from the mounting base under the elastic force of the elastic structure. The movement of the adapter bracket relative to the mounting base drives the optical system to move together, causing a change in the optical axis position of the optical system, thereby adjusting the optical axis position. Achieving optical axis adjustment by rotating the adjusting element allows for continuous adjustment, avoiding repeated disassembly and assembly operations during the adjustment process. This enables quick adjustment of the optical axis to the corresponding position, reduces adjustment time, and lowers the skill requirements for the adjustment personnel. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an imaging module provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the imaging module shown from another perspective;

[0024] Figure 3 for Figure 1 An exploded view of the imaging module shown;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of the intermediate element shown;

[0026] Figure 5 for Figure 2 Left view of the imaging module shown;

[0027] Figure 6 for Figure 5 A sectional view along line A-A;

[0028] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0029] Figure 8 for Figure 6 A magnified view of a portion of point C.

[0030] In the diagram: 10. Imaging module; 12. Optical system; 14. Optical axis adjustment mechanism; 16. Mounting base; 18. Adapter bracket; 20. Adjustment component; 22. Optical device; 24. Imaging device; 26. Light passage hole; 28. Adjustment element; 29. ​​Elastic structure; 30. Intermediate element; 32. Adjustment hole; 34. Notch; 36. Storage hole; 38. Outer peripheral surface; 40. Inner peripheral surface; 42. Base; 44. Mounting part; 45. Threaded hole; 46. Through hole; 49. Positioning structure; 50. Positioning ball; 52. Positioning hole; 54. Connector; 56. First through hole; 58. Second through hole. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and 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.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0034] Please see Figure 1 and Figure 2 An embodiment of the present invention provides an imaging module 10, including an optical system 12 and an optical axis adjustment mechanism 14. The optical system 12 is mounted on the optical axis adjustment mechanism 14, which is used to adjust the optical axis O of the optical system 12 so that the optical axes O of multiple imaging modules 10 used in the same imaging device remain parallel, thereby improving the imaging quality.

[0035] The optical axis adjustment mechanism 14 includes a mounting base 16, an adapter bracket 18, and an adjustment component 20. The mounting base 16 is used to install the imaging module 10 onto a debugging platform or imaging device. The adapter bracket 18 is located on one side of the mounting base 16 and spaced apart from the mounting base 16. The optical system 12 is installed on the side of the adapter bracket 18 away from the mounting base 16. The adjustment component 20 connects the mounting base 16 and the adapter bracket 18 to adjust the position of the adapter bracket 18 relative to the mounting base 16. When the relative position of the adapter bracket 18 changes, it causes the relative position of the optical system 12 to change, thereby adjusting the position of the optical system 12 and thus achieving the effect of adjusting the optical axis O of the optical system 12.

[0036] The optical system 12 includes an optical element 22 and an imaging element 24. The optical element 22 is mounted on the side of the adapter bracket 18 away from the mounting base 16, and the imaging element 24 is mounted on the side of the optical element 22 away from the optical axis adjustment mechanism 14. When the position of the adapter bracket 18 relative to the mounting base 16 is adjusted by the adjustment component 20, the adapter bracket 18 moves relative to the mounting base 16, and the optical element 22 and the imaging element 24 move together with the adapter bracket 18, thereby adjusting the optical axis O of the optical system 12. Moreover, the entire optical system 12 moves with the adapter bracket 18, and there is no relative movement between the optical element 22 and the imaging element 24. This prevents the optical axis O of the optical element 22 and the imaging element 24 from shifting during the adjustment of the optical axis O, thus avoiding loss of optical parameters such as field of view and image quality.

[0037] The adapter bracket 18 moves relative to the mounting base 16 to adjust the optical axis O of the optical system 12. This can be achieved by the adapter bracket 18 moving closer to or further away from the mounting base 16 through deformation, by adjusting the overall tilt angle of the adapter bracket 18 relative to the mounting base 16 to change the relative position of the adapter bracket 18 and the mounting base 16, or by simultaneously deforming and tilting the adapter bracket 18 to change the relative position of the adapter bracket 18 and the mounting base 16.

[0038] The mounting base 16 and the adapter bracket 18 are respectively provided with light-transmitting holes 26, making them hollow. The light-transmitting holes 26 on the mounting base 16 correspond to the light-transmitting holes 26 on the adapter bracket 18, and the optical device 22 corresponds to the light-transmitting holes 26 on the adapter bracket 18, so as to prevent the mounting base 16 and the adapter bracket 18 from affecting the light-receiving of the optical system 12 and to facilitate the entry of light into the optical system 12.

[0039] Please see Figure 1 and Figure 3 In one embodiment, the adjustment assembly 20 includes an adjustment element 28 and an elastic structure 29. An adjustment hole 32 is provided on the adapter bracket 18. The adjustment element 28 passes through the adjustment hole 32 and is connected to the mounting base 16. The elastic structure 29 is located between the mounting base 16 and the adapter bracket 18. The adjustment element 28 can perform a helical movement relative to the mounting base 16, causing the adapter bracket 18 to move relative to the mounting base 16 by compressing the elastic structure 29 or under the elastic force of the elastic structure 29, thereby driving the optical system 12 to move and adjust the optical axis O of the optical system 12. When the adjustment element 28 performs a helical movement relative to the mounting base 16 in a tightening manner, the adjustment element 28 compresses the adapter bracket 18. The adapter bracket 18 transmits the compressive force to the elastic structure 29, causing the elastic structure 29 to deform and generate elastic force. The portion of the adapter bracket 18 corresponding to the adjustment element 28 moves towards the mounting base 16 by compressing the elastic structure 29. When the adjusting element 28 moves in a spiral motion relative to the mounting base 16 in a loosening direction, the squeezing force of the adjusting element 28 on the adapter bracket 18 decreases, and the squeezing force of the adapter bracket 18 on the elastic structure 29 also decreases accordingly. At this time, the elastic force of the elastic structure 29 is greater than the squeezing force of the adapter bracket 18 on the elastic structure. Under the action of its elastic force, the elastic structure 29 pushes the corresponding part of the adapter bracket 18 and the elastic structure 29 to move away from the mounting base 16. When the adapter bracket 18 moves closer to or further away from the mounting base 16, it will drive the optical system 12 to move together, causing the position of the optical system 12 to change, thereby realizing the adjustment of the optical axis O of the optical system 12. After the optical axis O is adjusted, the squeezing force of each adjusting element 28 on the adapter bracket 18 is the same as the elastic force of the corresponding elastic structure 29 on the adapter bracket 18, positioning the adapter bracket 18 in the corresponding position, thereby positioning the optical system 12 in the corresponding position, so as to enhance the stability after the optical axis O is adjusted. The optical axis O can be adjusted by rotating the adjusting element 28, which can provide continuous small adjustment ranges and form a continuous adjustment effect. This avoids repeated disassembly and assembly operations during the adjustment process, so as to quickly adjust the optical axis O to the corresponding position, reduce the adjustment time, reduce the requirements for the proficiency of the debugging personnel, improve the adjustment accuracy, and the adjustment operation is simple and does not require repeated disassembly and assembly operations, so as to make the adjustment operation in a relatively narrow space.

[0040] Understandably, the adjusting element 28 can move spirally relative to the mounting base 16. This can be achieved by directly threading the adjusting element 28 into the mounting base 16. For example, the mounting base 16 has a threaded hole, and the adjusting element 28 passes through the adjusting hole 32 and is screwed into the threaded hole, forming a threaded engagement with the mounting base 16 through the threaded hole. Alternatively, the adjusting element 28 can be configured to include a bolt and a nut. The bolt passes through the adapter bracket 18 and the mounting base 16 and is threaded into the nut, which is then fixed relative to the mounting base 16. This also allows the adjusting element 28 to move spirally relative to the mounting base 16.

[0041] In an optional example, the adjusting element 28 is a screw, and the mounting base 16 has a threaded hole 45. One end of the adjusting element 28 is located inside the threaded hole 45, and the external thread on the adjusting element 28 engages with the internal thread of the threaded hole 45, so that the adjusting element 28 and the mounting base 16 are threadedly engaged, thereby achieving the effect that the adjusting element 28 can move helically relative to the mounting base 16. By providing a threaded hole 45 to allow the adjusting element 28 to directly engage with the mounting base 16, the overall structure is relatively simple, and there is no need for the fixing operation of the nut and the mounting base 16, so as to reduce the assembly difficulty.

[0042] In one embodiment, the elastic structure 29 includes an intermediate element 30 and a mounting portion 44. One of the adapter bracket 18 and the mounting base 16 is provided with the mounting portion 44. The intermediate element 30 is located between the mounting portion 44 and the other of the adapter bracket 18 and the mounting base 16. That is, the intermediate element 30 and the mounting portion 44 are interconnected, and the end of the intermediate element 30 away from the mounting portion 44 is connected to one of the adapter bracket 18 and the mounting base 16, while the end of the mounting portion 44 away from the intermediate element 30 is connected to the other of the adapter bracket 18 and the mounting base 16.

[0043] The mounting portion 44 has a receiving hole 36. The intermediate element 30 is partially housed within the receiving hole 36 and partially located outside the receiving hole 36, connecting to either the mounting base 16 or the adapter bracket 18 that does not have a mounting portion 44. At least one of the intermediate element 30 and the mounting portion 44 is an elastic element, allowing the intermediate element 30 to move relative to the receiving hole 36 under the pressure of the adapter bracket 18. During the tightening of the adjusting element 28, the pressure exerted by the adjusting element 28 on the adapter bracket 18 increases, and the pressure exerted on the elastic structure 29 increases accordingly. The intermediate element 30 moves into the receiving hole 36, the portion of the intermediate element 30 protruding outside the receiving hole 36 decreases, and the portion of the adapter bracket 18 corresponding to the adjusting element 28 moves towards the mounting base 16. During the process of loosening the adjusting element 28, the squeezing force of the adjusting element 28 on the adapter bracket 18 decreases, the squeezing force on the elastic structure 29 decreases, and the intermediate element 30 moves outward from the storage hole 36 under the action of elastic force. The part of the intermediate element 30 protruding from the storage hole 36 increases, and pushes the part of the adapter bracket 18 corresponding to the adjusting element 28 to move away from the mounting base 16.

[0044] In an alternative example, the intermediate element 30 is an elastic member, while the mounting portion 44 is not elastic and is located on the mounting base 16. The intermediate element 30 is connected to the adapter bracket 18. When the adapter bracket 18 presses against the intermediate element 30, the intermediate element 30 deforms and moves into the receiving hole 36.

[0045] In other embodiments, the elastic structure 29 can also be a spring, with its two ends connected to the adapter bracket 18 and the mounting base 16, respectively. When the adapter bracket 18 compresses the spring, the spring is compressed, its overall length decreases, and its elastic potential energy increases. When the pressure of the adapter bracket 18 on the spring decreases, the spring force is greater than the pressure of the adapter bracket 18 on the spring, thus the spring pushes the adapter bracket 18 to move away from the mounting base 16. Alternatively, the intermediate element 30 may not be elastic, while the mounting portion 44 may be elastic. In this case, the receiving hole 36 on the mounting portion 44 is an elastic hole, and its diameter can change with the magnitude of the pressure.

[0046] Please see Figures 4 to 7 In one embodiment, the intermediate element 30 is annular and has a notch 34 formed in the circumferential direction. The notch 34 extends from one axial end of the intermediate element 30 to the other axial end and from the radial inner surface to the radial outer surface of the intermediate element 30. That is, the notch 34 penetrates the intermediate element 30 in the axial and radial directions, respectively.

[0047] The intermediate element 30 is spaced apart at its two circumferential ends, with a gap 34 between them. The two circumferential ends of the intermediate element 30 can move closer or further apart, thereby compressing or opening the gap 34. When the two ends of the intermediate element 30 move closer together, the intermediate element 30 is compressed and generates elasticity. By providing the gap 34 to make the adjusting element 28 elastic, compared to a compression spring, the intermediate element 30 can generate greater elasticity within the same volume, creating a larger counterforce on the adapter bracket 18. This helps maintain the stability of the imaging module 10 after adjustment, achieving a balance between product size and stability.

[0048] Optionally, the intermediate element 30 may be made of rolled metal plates such as aluminum, iron, copper, etc., and the adapter bracket 18 and the mounting base 16 may also be made of metal materials such as aluminum, iron, copper, etc., to enhance the overall strength of the adapter bracket 18 and the mounting base 16.

[0049] The mounting part 44 is provided with a receiving hole 36 for accommodating the intermediate element 30. The intermediate element 30 is partially located inside and partially outside the receiving hole 36, and at least one of the outer circumferential surface of the intermediate element 30 and the inner circumferential surface of the receiving hole 36 is outwardly flared. When the compressive force of the intermediate element 30 on the adapter bracket 18 increases, the two ends of the intermediate element 30 on both sides of the notch 34 move closer to each other under the compressive force, the circumferential dimension of the intermediate element 30 decreases, and it moves into the receiving hole 36. When the compressive force of the intermediate element 30 on the adapter bracket 18 decreases, the intermediate element 30 opens the notch 34 under its own elastic force, the circumferential dimension of the intermediate element 30 increases, and it moves away from the receiving hole 36, thereby pushing the adapter bracket 18 to move.

[0050] In this embodiment, both the outer peripheral surface 38 of the intermediate element 30 and the inner peripheral surface 40 of the receiving hole 36 are outwardly flared, meaning that both the outer peripheral surface 38 and the inner peripheral surface 40 are conical or truncated conical surfaces. When the intermediate element 30 is not deformed, its maximum circumferential dimension is greater than that of the receiving hole 36. Therefore, the intermediate element 30 can only be partially housed within the receiving hole 36. When the intermediate element 30 is compressed, it deforms, reducing its volume and moving towards the receiving hole 36, allowing the adapter bracket 18 to move closer to the mounting base 16. The outer peripheral surface 38 of the intermediate element 30 is adapted to the inner peripheral surface 40 of the receiving hole 36. That is, when the intermediate element 30 is partially stored in the receiving hole 36, the outer peripheral surface 38 of the part of the intermediate element 30 located in the receiving hole 36 and the inner peripheral surface 40 of the receiving hole 36 can fit together to enhance the stability of the intermediate element 30. At the same time, when the intermediate element 30 moves relative to the receiving hole 36, the outer peripheral surface 38 of the intermediate element 30 and the inner peripheral surface 40 of the receiving hole 36 can cooperate to form a guiding effect to prevent the intermediate element 30 from shaking during movement.

[0051] In an alternative example, the receiving hole 36 is provided on the mounting portion 44 of the mounting base 16, and the radial dimensions of the intermediate element 30 and the receiving hole 36 gradually decrease along the direction from the adapter bracket 18 to the mounting base 16.

[0052] Please see Figure 7 In one embodiment, the intermediate element 30 is annular, and a through hole 46 is formed on the inner side of the intermediate element 30. The through hole 46 corresponds to the adjustment hole 32. One end of the adjustment element 28 passes through the adjustment hole 32 and the through hole 46 and is connected to the mounting base 16, so that the intermediate element 30 forms the effect of being sleeved on the outside of the adjustment element 28, so as to improve the overall compactness of the optical axis adjustment mechanism 14.

[0053] The inner diameter of the end of the through hole 46 near the adapter bracket 18 is larger than the inner diameter of the end of the through hole 46 away from the adapter bracket 18. When the adjusting element 28 passes through the through hole 46, one end of the adjusting element 28 first passes through the end of the through hole 46 near the adapter bracket 18, and then passes through the end of the through hole 46 away from the adapter bracket 18 and protrudes out of the intermediate element 30 to connect with the mounting base 16. Because the inner diameter of the end of the through hole 46 near the adapter bracket 18 is larger than the inner diameter of the end away from the adapter bracket 18, it is convenient to insert the adjusting element 28 into the through hole 46 of the intermediate element 30, reducing the assembly difficulty.

[0054] The inner diameter of the perforation 46 is larger than the outer diameter of the portion of the adjusting element 28 located inside the perforation 46, so that when the adjusting element 28 passes through the perforation 46, the inner wall of the perforation 46 and the outer wall of the adjusting element 28 are spaced apart, that is, the adjusting element 28 does not contact the intermediate element 30, thus avoiding friction between the adjusting element 28 and the intermediate element 30 during the rotation process, which would affect its rotation.

[0055] The mounting part 44 is located on the side of the mounting base 16 near the adapter bracket 18 and is integrally formed with the mounting base 16. The storage hole 36 passes through the mounting part 44. The mounting base is provided with a threaded hole 45 that communicates with the storage hole 36. One end of the adjusting element 28 passes through the intermediate element 30 and is threaded into the threaded hole 45 to achieve the effect of the adjusting element 28 moving spirally relative to the mounting base 16.

[0056] In other embodiments, the adjusting element 28 may not pass through the intermediate element 30, and the intermediate element 30 and the mounting part 44 may be disposed as a whole on the outside of the adjusting element 28.

[0057] Please see Figure 7 In one embodiment, the inner diameter of the adjustment hole 32 is larger than the outer diameter of the portion of the adjustment element 28 located within the adjustment hole 32, so that the inner wall of the adjustment hole 32 and the outer wall of the adjustment element 28 are spaced apart from each other, thereby forming a clearance space between the inner wall of the adjustment hole 32 and the adjustment element 28, so that the adjustment element 28 can be avoided when the adapter bracket 18 moves relative to the mounting base 16, reducing the difficulty of adjustment.

[0058] Optionally, the entire inner wall of the adjustment hole 32 is spaced apart from the adjustment element 28, thereby forming a clearance space around the outer periphery of the adjustment element 28, so as to create a clearance effect on the adjustment element 28 in different directions.

[0059] Please see Figure 3 , Figure 5 , Figure 6 as well as Figure 8 In one embodiment, the optical axis adjustment mechanism 14 further includes a positioning component 49, which includes a positioning ball 50 and a positioning hole 52. The positioning ball 50 is located between the adapter bracket 18 and the mounting base 16. The adapter bracket 18 and / or the mounting base 16 are provided with a positioning hole 52 to accommodate the positioning ball 50. The positioning hole 52 is adapted to the positioning ball 50, that is, the outer surface of the positioning ball 50 can fit against the inner wall of the positioning hole 52. Since the inner diameter of the adjustment hole 32 is larger than the inner diameter of the adjustment element 28, the adapter bracket 18 may move linearly relative to the mounting base 16 in a plane perpendicular to the optical axis O when subjected to impact vibration. The cooperation between the positioning ball 50 and the positioning hole 52 can limit the movement of the adapter bracket 18, preventing it from moving linearly relative to the mounting base 16 in a direction perpendicular to the optical axis, thereby preventing the optical axis O of the imaging module 10 from deviating from the adjusted position. Furthermore, the cooperation between the positioning ball 50 and the positioning hole 52 allows the adapter bracket 18 to deflect and tilt relative to the mounting base 16 around the positioning ball 50 during the adjustment of the optical axis O, reducing the influence of the positioning component 49 on the optical axis adjustment operation. The adapter bracket 18 is more flexible during the adjustment process so that the optical axis O can be adjusted to the corresponding position.

[0060] Optionally, the adapter bracket 18 and the mounting base 16 are respectively provided with positioning holes 52 on their adjacent sides, and the positioning ball 50 is partially located in the positioning hole 52 on the adapter bracket 18 and partially located in the positioning hole 52 on the mounting base 16.

[0061] The mounting base 16 has a protrusion on the side near the adapter bracket 18, and the protrusion has a positioning hole 52. The axial length of the protrusion is basically the same as the axial length of the mounting part 44.

[0062] The positioning assembly 49 also includes a connector 54. The adapter bracket 18 has a first through hole 56, and the positioning ball 50 has a second through hole 58. The connector 54 passes through the first through hole 56 and the second through hole 58 and connects to the mounting base 16 to clamp the positioning ball 50 between the adapter bracket 18 and the mounting base 16, and to sleeve the positioning ball 50 on the outside of the connector 54, thereby improving the overall structural compactness. Optionally, both the connector 54 and the adjusting element 28 are screws, and they are threaded into the mounting base 16 respectively.

[0063] The diameter of the first through hole 56 is larger than the outer diameter of the portion of the connector 54 located inside the first through hole 56, so that the inner wall of the first through hole 56 is spaced apart from the outer wall of the connector 54, thereby forming a clearance space between the inner wall of the first through hole 56 and the connector 54, so as to avoid the connector 54 when the adapter bracket 18 moves relative to the mounting base 16.

[0064] The diameter of the second through hole 58 is larger than the outer diameter of the portion of the connector 54 located inside the second through hole 58, thereby separating the inner wall of the second through hole 58 from the outer wall of the connector 54, preventing the connector 54 from contacting the positioning ball 50, preventing friction between the connector 54 and the positioning element, and also facilitating the connection of the connector 54 through the second through hole 58, reducing assembly difficulty.

[0065] Please see Figure 5In one embodiment, there are multiple adjustment components 20, each with the same structure, and each adjustment component 20 can adjust the position of the adapter bracket 18. Optionally, the multiple adjustment components 20 include at least a first adjustment component 201, a second adjustment component 202, and a third adjustment component 203. The distance between the first adjustment component 201 and the second adjustment component 202, and the distance between the first adjustment component 201 and the third adjustment component 203 are both smaller than the distance between the second adjustment component 202 and the third adjustment component 203. The arrangement directions of the first adjustment component 201 and the second adjustment component 202, and the arrangement directions of the first adjustment component 201 and the third adjustment component 203 are perpendicular to each other. That is, the multiple adjustment components 20 of the optical axis adjustment mechanism 14 are arranged in at least two mutually perpendicular directions so that the adapter bracket 18 can be adjusted in different directions through the cooperation between different adjustment components 20. The adjustment of the position of the adapter bracket 18 is more flexible so that the optical axis O can be adjusted to the corresponding position.

[0066] After the optical axis O of the imaging module 10 is adjusted, the elastic structure 29 of each adjustment component 20 is deformed by the adapter bracket 18, that is, multiple elastic structures 29 are in a compressed state, and each elastic structure 29 exerts a pushing force on the adapter bracket 18. This pushing force is balanced with the squeezing force of the adjustment element 28 on the adapter bracket 18. The adjustment element 28 and the elastic structure 29 have a limiting effect on the adapter bracket 18 to position the adapter bracket 18 in the corresponding position, so as to improve the stability after the optical axis adjustment is completed.

[0067] In this embodiment, there are three adjustment components 20, namely the first adjustment component 201, the second adjustment component 202, and the third adjustment component 203, and one positioning component 49. The adapter bracket 18 is basically rectangular and has four corners. The three adjustment components 20 and the one positioning component 49 are respectively set at the four corners of the adapter bracket 18. That is, the three adjustment components 20 are respectively set at the three corners of the adapter bracket 18, and the positioning component 49 is set at the remaining corner of the adapter bracket 18, forming a three-point elastic support and one-point positioning effect to enhance the stability of the imaging module 10 after the optical axis O is adjusted.

[0068] This utility model also provides an imaging device, which includes multiple imaging modules 10 as described in the above embodiments. The optical axes O of the multiple imaging modules 10 are parallel to each other to improve imaging quality. Since the imaging device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be described in detail here.

[0069] Understandably, the multiple imaging modules 10 of the imaging device can be installed on the same mounting surface of the imaging device or on different mounting surfaces of the imaging device, as long as the optical axes of the multiple imaging modules 10 remain parallel.

[0070] During the adjustment of the optical axes of the multiple imaging modules 10 of the imaging device, the multiple imaging modules 10 can be respectively installed on an adjustment platform with a three-dimensional turntable and a collimator. The collimator is equipped with a suitable target, and the target can provide clear observation for each imaging module 10. Specifically, the optical system 12 can be first installed on the adapter bracket 18, and the mounting bases 16 of the multiple imaging modules 10 can be respectively installed on one or more mounting surfaces of the adjustment platform located on the same reference. The positioning ball 50 and the intermediate element 30 can be respectively installed on the mounting base 16. The positioning ball 50 and the intermediate element 30 are clamped between the adapter bracket 18 and the mounting base 16 by adjusting the element 28 and the connector 54. Using other optical path systems as a reference, by rotating the adjusting element 28, the optical axes of the multiple imaging modules 10 are made parallel to the optical axis of the reference optical path system, thus completing the adjustment of the optical axes of the multiple imaging modules 10.

[0071] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An optical axis adjustment mechanism, characterized in that, It includes a mounting base (16), an adapter bracket (18), and an adjustment assembly (20). The adapter bracket (18) is used to mount the optical system (12), and the adjustment assembly (20) is connected to the mounting base (16) and the adapter bracket (18) respectively. The adjustment assembly (20) includes an adjustment element (28) and an elastic structure (29). The adapter bracket (18) is provided with an adjustment hole (32). The adjustment element (28) passes through the adjustment hole (32) and is connected to the mounting base (16). The elastic structure (29) is located between the mounting base (16) and the adapter bracket (18). The adjustment element (28) can move spirally relative to the mounting base (16) so that the adapter bracket (18) moves relative to the mounting base (16) by squeezing the elastic structure (29) or by the elastic force of the elastic structure (29).

2. The optical axis adjustment mechanism according to claim 1, characterized in that, The elastic structure (29) includes a spring, the two ends of which are respectively connected to the adapter bracket (18) and the mounting base (16); or, The elastic structure (29) includes an intermediate element (30) and a mounting portion (44). One of the adapter bracket (18) and the mounting base (16) is provided with the mounting portion (44). The intermediate element (30) is located between the mounting portion (44) and the other of the adapter bracket (18) and the mounting base (16). The mounting portion (44) is provided with a receiving hole (36) for receiving the intermediate element (30). At least one of the intermediate element (30) and the mounting portion (44) is an elastic element so that the intermediate element (30) can move relative to the receiving hole (36) under the squeezing action of the adapter bracket (18).

3. The optical axis adjustment mechanism according to claim 2, characterized in that, The intermediate element (30) is an elastic element. The intermediate element (30) is annular and has a notch (34) formed in the circumferential direction. At least one of the outer circumferential surface (38) of the intermediate element (30) and the inner circumferential surface (40) of the receiving hole (36) is outwardly flared. The intermediate element (30) can squeeze the notch (34) or open the notch (34) and move relative to the receiving hole (36).

4. The optical axis adjustment mechanism according to claim 3, characterized in that, The outer peripheral surface (38) of the intermediate element (30) and the inner peripheral surface (40) of the receiving hole (36) are both outwardly flared and mutually compatible.

5. The optical axis adjustment mechanism according to claim 3, characterized in that, A through hole (46) is formed on the inner side of the intermediate element (30), the through hole (46) corresponds to the adjustment hole (32), and one end of the adjustment element (28) passes through the adjustment hole (32) and the through hole (46) and is connected to the mounting base (16).

6. The optical axis adjustment mechanism according to claim 5, characterized in that, The inner diameter of the perforation (46) near the adapter bracket (18) is larger than the inner diameter of the perforation (46) away from the adapter bracket (18), and the inner wall of the perforation (46) is spaced apart from the outer wall of the adjusting element (28).

7. The optical axis adjustment mechanism according to claim 5, characterized in that, The mounting part (44) is located on the side of the mounting base (16) near the adapter bracket (18) and is integrally formed with the mounting base (16). The mounting base (16) is provided with a threaded hole (45) communicating with the storage hole (36). One end of the adjusting element (28) passes through the through hole (46) and is threaded into the threaded hole (45).

8. The optical axis adjustment mechanism according to claim 1, characterized in that, The inner diameter of the adjustment hole (32) is larger than the outer diameter of the portion of the adjustment element (28) located inside the adjustment hole (32), so that the inner wall of the adjustment hole (32) is spaced apart from the outer wall of the adjustment element (28).

9. The optical axis adjustment mechanism according to any one of claims 1-8, characterized in that, It also includes a positioning component (49), which includes a positioning ball (50) and a positioning hole (52) adapted to the positioning ball (50). The mounting base (16) and / or the adapter bracket (18) are provided with the positioning hole (52). The positioning ball (50) is housed in the positioning hole (52) to restrict the movement of the adapter bracket (18) relative to the mounting base (16) in a direction perpendicular to the optical axis.

10. The optical axis adjustment mechanism according to claim 9, characterized in that, The positioning component (49) further includes a connector (54). The adapter bracket (18) is provided with a first through hole (56), and the positioning ball (50) is provided with a second through hole (58). The connector (54) passes through the first through hole (56) and the second through hole (58) and is connected to the mounting base (16). The inner wall of the first through hole (56) is spaced apart from the outer wall of the connector (54).

11. The optical axis adjustment mechanism according to claim 9, characterized in that, The adapter bracket (18) is rectangular, and there are three adjustment components (20) and one positioning component (49). The three adjustment components (20) and the one positioning component (49) are respectively located at the four corners of the adapter bracket (18).

12. The optical axis adjustment mechanism according to any one of claims 1-8, characterized in that, The number of adjustment components (20) is multiple, and the multiple adjustment components (20) include at least a first adjustment component (201), a second adjustment component (202) and a third adjustment component (203). The arrangement directions of the first adjustment component (201) and the second adjustment component (202) and the arrangement directions of the first adjustment component (201) and the third adjustment component (203) are perpendicular to each other.

13. An imaging module, characterized in that, Includes the optical axis adjustment mechanism and optical system (12) as described in any one of claims 1-12, wherein the optical system (12) is disposed on the side of the adapter bracket (18) away from the mounting base (16), and the mounting base (16) and the adapter bracket (18) are respectively provided with light-transmitting holes (26) corresponding to the optical system (12).

14. An imaging device, characterized in that, It includes multiple imaging modules as described in claim 13, wherein the optical axes of the multiple imaging modules are parallel to each other.

Images