Laser speckle removal device and optical mechanism

Abstract

This application discloses a laser speckle reduction device and an optomechanical system. The laser speckle reduction device includes a substrate, a driving assembly, and a moving assembly. A through-slot extending along the optical axis is provided on the substrate. The driving assembly includes a first electromagnetic group and a second electromagnetic group, with at least a portion of the first and second electromagnetic groups disposed on the inner wall of the through-slot, or both disposed on the same side of the substrate perpendicular to the optical axis. The moving assembly includes a first moving group, a second moving group, and two diffusers disposed corresponding to the through-slot. Both moving groups are elastically connected to the substrate. The first moving group is connected to the first electromagnetic group, and the second moving group is connected to the second electromagnetic group. The two diffusers are respectively fixed to the first and second moving groups. The first electromagnetic group drives the first moving group to move, and the second electromagnetic group drives the second moving group to move. The driving forces generated by the two electromagnetic groups have different directions. The embodiments of this application enable a more compact structure for the laser speckle reduction device, thereby reducing the device's size.

Description

Technical Field

[0001] This application relates to the field of projection display technology, and in particular to a laser speckle removal device and optical mechanism. Background Technology

[0002] Despeckle elimination is a crucial step in laser projection technology. The principle behind it involves moving a diffuser within the device. When the laser beam passes through the diffuser, it generates beams at different angles. The superposition of these beams creates the visual effect of speckle elimination. However, in related technologies, the need to move the diffuser results in numerous components and a complex structure in the speckle elimination device, leading to a relatively large overall size. Utility Model Content

[0003] This application provides a laser speckle removal device and an optomechanical system, which enables the device to have a more compact structure, thereby reducing the size of the device.

[0004] In a first aspect, embodiments of this application provide a laser speckle removal device, comprising: A substrate having a through groove extending along the optical axis. The driving assembly includes a first electromagnetic group and a second electromagnetic group, wherein at least a portion of the first electromagnetic group is disposed on the inner wall of the through groove and at least a portion of the second electromagnetic group is disposed on the inner wall of the through groove, or the first electromagnetic group and the second electromagnetic group are both disposed on the same side of the substrate perpendicular to the optical axis. The moving component includes a first moving group, a second moving group, and two diffuser sheets. The first moving group and the second moving group are both elastically connected to the substrate. The first moving group is connected to the first electromagnetic group, and the second moving group is connected to the second electromagnetic group. The two diffuser sheets are both disposed corresponding to the through slot. One diffuser sheet is fixed on the first moving group to move with the first moving group, and the other diffuser sheet is fixed on the second moving group to move with the second moving group. The first electromagnetic group is used to drive the first moving group to move, and the second electromagnetic group is used to drive the second moving group to move. The driving forces generated by the first electromagnetic group and the second electromagnetic group are in different directions.

[0005] Secondly, embodiments of this application provide an optical engine, including a light source and a laser speckle removal device as described in the above embodiments, wherein the light emitted by the light source passes through the laser speckle removal device.

[0006] Based on the laser speckle removal device and optomechanic in the embodiments of this application, this embodiment can reduce the height of the driving component and the substrate in the optical axis direction by disposing at least a portion of the first electromagnetic group and at least a portion of the second electromagnetic group on the inner wall of the through groove, or by disposing the first electromagnetic group and the second electromagnetic group on the same side of the substrate along the optical axis direction. This reduces the stacked structure in the laser speckle removal device, lowers the overall height, makes the overall structure of the device more compact, reduces the overall volume of the device, and facilitates the integration of the laser speckle removal device into various projection devices. At the same time, different electromagnetic groups in the driving component can control the first moving group and the second moving group to move in different directions, improving the effect of eliminating laser beam speckle and enhancing the clarity of the image. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a first-view structural schematic diagram of the laser speckle removal device in one embodiment of this application; Figure 2 This is a second-view structural schematic diagram of the laser speckle removal device in one embodiment of this application; Figure 3 This is a schematic diagram of the exploded structure of the laser speckle removal device in another embodiment of this application; Figure 4 This is a first-view structural schematic diagram of the laser speckle removal device in another embodiment of this application; Figure 5 This is a second-view structural schematic diagram of the laser speckle removal device in another embodiment of this application; Figure 6 This is a schematic diagram of the structure of the moving component and the driving component in one embodiment of this application.

[0009] Figure label: 1. Laser speckle removal device; 10. Substrate; 11. Through-slot; 12. Mounting component; 13. Circuit board; 20. Moving assembly; 21. First moving group; 211. First support bracket; 212. First elastic arm; 22. Second moving group; 221. Second support bracket; 222. Second elastic arm; 23. Diffuser sheet; 30. Drive assembly; 31. First electromagnetic group; 311. First magnet; 312. First coil; 32. Second electromagnetic group; 321. Second magnet; 322. Second coil; 40. Fixing part. Detailed Implementation

[0010] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, a clear and complete description will be provided below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0011] In related technologies, because the movement of the diffuser is required, the device for eliminating laser speckle has many components and a complex structure, which easily leads to a large overall size of the device.

[0012] Regarding the above situation, firstly, please refer to [link / reference needed]. Figures 1-2 This application proposes a laser speckle removal device 1, including a substrate 10, a moving component 20, and a driving component 30. Among them, Figure 1 and Figure 2 Side a and side b are two sides of the substrate 10 that are arranged opposite each other along the optical axis Z.

[0013] like Figures 1-3 As shown, a through groove 11 extending along the optical axis Z is provided on the substrate 10; the driving assembly 30 includes a first electromagnetic group 31 and a second electromagnetic group 32, at least a portion of the first electromagnetic group 31 is disposed on the inner wall of the through groove 11 and at least a portion of the second electromagnetic group 32 is disposed on the inner wall of the through groove 11, or, the first electromagnetic group 31 and the second electromagnetic group 32 are both disposed on the same side of the substrate 10 perpendicular to the optical axis Z (e.g., Figure 1 and Figure 5 As shown in side a); the moving assembly 20 includes a first moving group 21, a second moving group 22, and two diffuser sheets 23. The first moving group 21 and the second moving group 22 are both elastically connected to the substrate 10. The first moving group 21 is connected to the first electromagnetic group 31, and the second moving group 22 is connected to the second electromagnetic group 32. The two diffuser sheets 23 are respectively disposed corresponding to the through slot 11. One diffuser sheet 23 is fixed on the first moving group 21 to move with the first moving group 21, and the other diffuser sheet 23 is fixed on the second moving group 22 to move with the second moving group 22. The first electromagnetic group 31 is used to drive the first moving group 21 to move, and the second electromagnetic group 32 is used to drive the second moving group 22 to move. The driving forces generated by the first electromagnetic group 31 and the second electromagnetic group 32 are in different directions.

[0014] Specifically, when at least a portion of the first electromagnetic group 31 and at least a portion of the second electromagnetic group 32 are disposed on the inner wall of the through groove 11, the first electromagnetic group 31 (second electromagnetic group 32) can be partially located inside the through groove 11 and partially located outside the through groove 11; or the entire first electromagnetic group 31 (second electromagnetic group 32) can be located inside the through groove 11, with the first electromagnetic group 31 and the second electromagnetic group 32 arranged at intervals along the optical axis direction Z. The through groove 11 on the substrate 10 can provide installation space and a base for the moving component 20 and the driving component 30. The first electromagnetic group 31 and the second electromagnetic group 32 can be located on the periphery of the moving component 20 in the through groove 11 to make the structure more compact and reduce the device volume. When the first electromagnetic group 31 and the second electromagnetic group 32 are both disposed on the same side a of the substrate 10 perpendicular to the optical axis direction Z (e.g., Figure 1 and Figure 5 As shown, when the first electromagnetic group 31 and the second electromagnetic group 32 are on the same horizontal plane perpendicular to the optical axis Z, the space occupied by the arrangement of the first electromagnetic group 31 and the second electromagnetic group 32 is less than the space occupied by the stacked arrangement of the first electromagnetic group 31 and the second electromagnetic group 32, thereby making the overall structure more compact and reducing the size of the device.

[0015] The first moving group 21 and the second moving group 22 can move in multiple directions under the control of different electromagnetic groups, thereby reducing laser beam speckle and optimizing imaging quality. The driving component 30 can be equipped with two or more electromagnetic groups. When the driving component 30 includes two electromagnetic groups, both the first moving group 21 and the second moving group 22 can be driven by one electromagnetic group, thus producing movement in one direction. Alternatively, when the driving component 30 is equipped with multiple electromagnetic groups (e.g., three, four, five, etc.), both the first moving group 21 and the second moving group 22 can be driven by one or more electromagnetic groups, allowing both to move in multiple different directions. Specifically, both the first moving group 21 and the second moving group 22 can be driven by two electromagnetic groups, allowing both to move in two different directions. Simultaneously, both the first moving group 21 and the second moving group 22 can move a diffuser 23, causing the diffuser 23 to undergo a slight displacement relative to the substrate 10. This alters the propagation path of the laser beam, ensuring a more uniform beam distribution as the laser beam passes through the diffuser 23, thus improving speckle elimination. The diffuser 23 is made of a high-transmittance material to ensure efficient beam transmission.

[0016] It should be noted that, compared to the sequentially stacked components of laser speckle removal devices in related technologies, such as multiple moving parts corresponding to multiple driving parts, and multiple driving parts stacked with multiple moving parts, the embodiments of this application optimize the structural layout of the laser speckle removal device 1. At least a portion of the first electromagnetic group 31 and at least a portion of the second electromagnetic group 32 are disposed in the through slot 11 of the substrate 10, or the first electromagnetic group 31 and the second electromagnetic group 32 are disposed on the same side a of the substrate 10 along the optical axis direction Z. This can reduce the height of the driving component 30 and the substrate 10 in the optical axis direction Z, that is, reduce the stacked structure in the laser speckle removal device 1, reduce the overall height along the optical axis direction Z, make the overall structure of the device more compact, reduce the overall volume of the device, and facilitate the integration of the laser speckle removal device 1 into various projection devices. Meanwhile, the first electromagnetic group 31 can control the first moving group 21 and a diffuser 23 to move, and the second electromagnetic group 32 can control the second moving group 22 and another diffuser 23 to move. Since the driving forces generated by the first electromagnetic group 31 and the second electromagnetic group 32 are in different directions, the first moving group 21 and the second moving group 22 can move in different directions, thereby improving the effect of eliminating laser speckle and enhancing the clarity of the image.

[0017] It should also be noted that, such as Figures 3-4 As shown, a printed circuit board 13 (Flexible Printed Circuit, FPC) is provided on the substrate 10. The circuit board 13 provides an interface with external circuits and is electrically connected to each group of drive components 30 to provide current signals to multiple groups of drive components 30. The drive components 30 can receive signals transmitted by the circuit board 13 to control the moving component 20 to move in different directions, thereby enhancing the effect of eliminating laser speckle.

[0018] Furthermore, in some embodiments of this application, such as Figure 1 and Figure 2 As shown, at least a portion of the first moving group 21 and at least a portion of the second moving group 22 are disposed in the through slot 11. It can be understood that the through slot 11 can also provide installation space for at least a portion of the moving components 20. In this case, the space occupied by the moving components 20 is less than the space occupied by the first moving group 21 and the second moving group 22 stacked sequentially. This reduces the height of the moving components 20 and the substrate 10 in the optical axis direction Z, that is, reduces the stacked structure in the laser speckle removal device 1, reduces the overall height along the optical axis direction Z, makes the overall structure of the device more compact, reduces the overall volume of the device, and facilitates the integration of the laser speckle removal device 1 into various projection devices.

[0019] Please see Figures 1-3In some embodiments of this application, a plurality of mounting members 12 are provided on the inner peripheral sidewall of the through groove 11; the first electromagnetic group 31 includes a first coil 312 and a first magnet 311, and the second electromagnetic group 32 includes a second coil 322 and a second magnet 321. The first coil 312 is sleeved on one mounting member 12, and the second coil 322 is sleeved on another mounting member 12. The central axis of both the first coil 312 and the central axis of the second coil 322 are perpendicular to the optical axis direction Z; the first magnet 311 is connected to the first moving group 21. Facing the side of the first coil 312, a first magnet 311 is disposed corresponding to the first coil 312. The first magnet 311 and the first coil 312 are coupled to generate a driving force to drive the first moving group 21 to move along a first direction. A second magnet 321 is connected to the side of the second moving group 22 facing the second coil 322. The second magnet 321 is disposed corresponding to the second coil 322. The second magnet 321 and the second coil 322 are coupled to generate a driving force to drive the second moving group 22 to move along a second direction, which is different from the first direction.

[0020] Specifically, both the first electromagnetic group 31 and the second electromagnetic group 32 are disposed in the through slot 11, which can effectively utilize the space of the through slot 11, making the overall structure more compact and thus helping to reduce the volume of the laser speckle removal device 1. The first coil 312 and the second coil 322 are wound around the periphery of different mounting parts 12, so that the first coil 312 and the second coil 322 are fixed on the mounting parts 12. The first magnet 311 is correspondingly disposed with the first coil 312, and the second magnet 321 is correspondingly disposed with the second coil 322. That is to say, the magnet and the coil work together to generate force through magnetic coupling, thereby driving the first moving group 21 and the second moving group 22 to move in a predetermined direction, ensuring stable displacement of the two moving groups in different directions. The first electromagnetic group 31 (second electromagnetic group 32) can act on the first moving group 21 (second moving group 22) through electromagnetic force, causing the first moving group 21 (second moving group 22) to move along a preset trajectory, thereby effectively controlling the beam path and reducing speckle phenomenon.

[0021] The first direction and the second direction are different, therefore they can be set at an angle, i.e., the angle formed between the first direction and the second direction can be acute, right, or obtuse. For example, both the first direction and the second direction are perpendicular to the optical axis direction Z. That is, if the optical axis direction Z is taken as the vertical direction, then both the first direction and the second direction are horizontal. Since the first direction and the second direction are set at an angle, the angle formed between the first direction and the second direction in the horizontal plane can be acute, right, or obtuse. Preferably, the angle between the first direction and the second direction is 90°, that is, the optical axis direction Z, the first direction, and the second direction are perpendicular to each other (e.g., ...). Figure 3 (The directions X and Y in the middle).

[0022] Understandably, magnetic coupling offers advantages such as fast response speed and high control precision. The magnetic force between the first magnet 311 and the first coil 312 can quickly respond to the drive signal and adjust the displacement of the first moving group 21; similarly, the magnetic force between the second magnet 321 and the second coil 322 can quickly respond to the drive signal and adjust the displacement of the second moving group 22, thereby ensuring image output quality. The magnetic fields generated by the energized first coil 312 and second coil 322 can interact with their corresponding magnets to form a stable driving force, effectively reducing energy consumption and improving the overall system efficiency. Each magnet and coil constitutes a driving unit, and multiple driving units can be arranged on opposite sides of a moving group to improve magnetic coupling efficiency and driving uniformity. Specifically, by applying a current of a specific waveform to the coil, the magnitude of the magnetic force between the magnet and the coil can be adjusted, causing the two moving groups to move under the influence of magnetic force, improving the effect of eliminating laser speckle and enhancing image clarity.

[0023] Furthermore, such as Figures 2-3 As shown, the drive assembly 30 includes two sets of first electromagnetic groups 31 and two sets of second electromagnetic groups 32. The two sets of first electromagnetic groups 31 are arranged opposite to each other, and the two sets of second electromagnetic groups 32 are arranged opposite to each other. The two ends of the first moving group 21 are respectively connected to the two sets of first electromagnetic groups 31, and the driving force generated by the two sets of first electromagnetic groups 31 is in the same direction. The two ends of the second moving group 22 are respectively connected to the two sets of second electromagnetic groups 32, and the driving force generated by the two sets of second electromagnetic groups 32 is in the same direction. That is to say, the two sets of first electromagnetic groups 31 synchronously control the displacement of the first moving group 21 to ensure the consistency and stability of the first moving group 21 during the movement process. Similarly, the two sets of second electromagnetic groups 32 synchronously control the displacement of the second moving group 22 to ensure the consistency and stability of the second moving group 22 during the movement process, thereby reducing the offset or shaking of the moving assembly 20 caused by uneven driving force.

[0024] Specifically, the first electromagnetic group 31 and the second electromagnetic group 32 are both located on the inner wall of the through groove 11. The two ends of the first moving group 21 are respectively connected to two opposing first electromagnetic groups 31, and the two ends of the second moving group 22 are respectively connected to two opposing second electromagnetic groups 32. Therefore, the moving component 20 is located in the through groove 11, which effectively utilizes the space of the through groove 11, making the overall structure more compact and thus helping to reduce the volume of the laser speckle removal device 1. The symmetrical arrangement of the two first electromagnetic groups 31 and the two second electromagnetic groups 32 allows the driving component 30 to distribute the force evenly. Each moving group moves independently through its corresponding electromagnetic group, ensuring the displacement accuracy of the two moving groups in different directions, thereby preventing motion interference between the two moving groups and ensuring that the two moving groups remain stable during movement.

[0025] It should be noted that both the driving component 30 and the moving component 20 are disposed in the through groove 11, and the first electromagnetic group 31 and the second electromagnetic group 32 are located on the periphery of the moving component 20 in the through groove 11. That is, the first electromagnetic group 31 and the second electromagnetic group 32 are between the moving component 20 and the substrate 10, thereby reducing the stacked structure along the optical axis Z in the device, reducing the overall height along the optical axis Z, making the overall structure of the device more compact, reducing the overall volume of the device, and facilitating the integration of the laser speckle removal device 1 into various projection devices.

[0026] In some embodiments, such as Figure 3 As shown, the peripheral sidewall of the through groove 11 has four inner sidewalls connected in sequence. Each of the four inner sidewalls is provided with a mounting member 12. Two first coils 312 are sleeved on two opposite mounting members 12, and two second coils 322 are also sleeved on two opposite mounting members 12, with the first coils 312 and second coils 322 arranged adjacent to each other. Taking an example where the optical axis direction Z, the first direction, and the second direction are mutually perpendicular, and the optical axis direction Z extends vertically, the magnet has a coupling surface that couples with the coil. This coupling surface is parallel to the optical axis direction Z, meaning it extends vertically, ensuring optimal magnetic coupling between the magnet and the coil in the vertical direction. This reduces magnetic loss, enhances the response speed and accuracy of the drive system, and thus controls the displacement of the first moving group 21 along the first direction and the displacement of the second moving group 22 along the second direction. In other embodiments, the coil portion of the electromagnetic group can also be disposed on the moving component 20, and the magnet portion of the electromagnetic group can be connected to the substrate 10. The energized coil generates a driving force under the magnetic field of the magnet, driving the moving group to move along the first direction or the second direction. In addition, the layout of the first electromagnetic group 31 and the second electromagnetic group 32 can be flexibly adjusted according to actual needs to ensure that the best driving effect can be achieved in different application scenarios.

[0027] Alternatively, in other embodiments of this application, the substrate 10 has a first side perpendicular to the optical axis direction (i.e. Figure 5Side a of the first moving group 21 is provided with multiple mounting parts 12; the first electromagnetic group 31 includes a first coil 312 and a first magnet 311, and the second electromagnetic group 32 includes a second coil 322 and a second magnet 321. The first coil 312 is sleeved on one mounting part 12, and the second coil 322 is sleeved on another mounting part 12. The central axis of the first coil 312 and the central axis of the second coil 322 are both parallel to the optical axis direction Z; the first magnet 311 is connected to the side a of the first moving group 21 facing the substrate 10. The first magnet 311 is set corresponding to the first coil 312. The coupling of the first magnet 311 and the first coil 312 generates a driving force to drive the first moving group 21 to move along a third direction; the second magnet 321 is connected to the side a of the second moving group 22 facing the substrate 10. The second magnet 321 is set corresponding to the second coil 322. The coupling of the second magnet 321 and the second coil 322 generates a driving force to drive the second moving group 22 to move along a fourth direction, which is different from the fourth direction.

[0028] Specifically, the first electromagnetic group 31 and the second electromagnetic group 32 are both disposed on the side a of the substrate 10 perpendicular to the optical axis direction Z, so that the first electromagnetic group 31 and the second electromagnetic group 32 are arranged in a flat manner on the first side a of the substrate 10 (e.g., Figure 5 As shown, this helps to reduce the thickness of the laser speckle removal device 1 in the optical axis direction Z, and facilitates the movement of the moving component 20 on the side a of the substrate 10 along the third or fourth direction, reducing the obstruction of the substrate 10 to the moving component 20.

[0029] The third direction differs from the fourth direction, therefore the third direction and the fourth direction can be set at an angle, that is, the angle formed between the third direction and the fourth direction can be an acute angle, a right angle, or an obtuse angle. For example, both the third direction and the fourth direction are perpendicular to the optical axis direction Z. That is, if the optical axis direction Z is taken as the vertical direction, then both the third direction and the fourth direction are horizontal directions. Since the third direction and the fourth direction are set at an angle, the angle formed between the third direction and the fourth direction in the horizontal plane can be an acute angle, a right angle, or an obtuse angle. Preferably, the angle between the third direction and the fourth direction is 90°, that is, the optical axis direction Z, the third direction, and the fourth direction are mutually perpendicular (e.g., ...). Figure 6 (The directions X and Y in the middle).

[0030] Furthermore, the drive assembly 30 includes two sets of first electromagnetic groups 31 and two sets of second electromagnetic groups 32, which are arranged around the outer periphery of the through groove 11; the two ends of the first moving group 21 are respectively connected to the two sets of first electromagnetic groups 31, and the driving force generated by the two sets of first electromagnetic groups 31 is in the same direction; the two ends of the second moving group 22 are respectively connected to the two sets of second electromagnetic groups 32, and the driving force generated by the two sets of second electromagnetic groups 32 is in the same direction.

[0031] It is understandable that the four sets of electromagnetic groups are arranged around the outer periphery of the through slot 11. That is, the four sets of electromagnetic groups in the drive assembly 30 are all located in the same plane and are arranged around the periphery of the optical axis Z. This makes the overall structure of the laser speckle removal device 1 more compact and helps to reduce the thickness of the laser speckle removal device 1 in the optical axis Z. In particular, through the symmetrical arrangement of the two sets of first electromagnetic groups 31 and the two sets of second electromagnetic groups 32, the drive assembly 30 can uniformly distribute the force. Each moving group moves independently through its corresponding electromagnetic group, ensuring the displacement accuracy of the two moving groups in different directions, thereby preventing motion interference between the two moving groups and keeping the two moving groups stable during movement.

[0032] Please see Figures 5-6 In some embodiments of this application, the first moving group 21 and the second moving group 22 both move in a plane perpendicular to the optical axis direction Z, and have mutually perpendicular X-axis and Y-axis directions in the plane perpendicular to the optical axis direction Z; the first moving group 21 moves along the X-axis direction in the plane perpendicular to the optical axis direction Z, and the second moving group 22 moves along the Y-axis direction in the plane perpendicular to the optical axis direction Z.

[0033] It is understood that the first moving group 21 and the second moving group 22 can move in the same plane along mutually perpendicular directions. Specifically, the first electromagnetic group 31 can drive the first moving group 21 to move along the X-axis, and the second electromagnetic group 32 can drive the second moving group 22 to move along the Y-axis, thereby improving the effect of eliminating laser speckle and enhancing the clarity of the image.

[0034] Please see Figure 3 or Figure 6 In some embodiments of this application, the first moving group 21 includes a first supporting bracket 211 and a first elastic arm 212. The opposite ends of the first supporting bracket 211 are respectively connected to two sets of first electromagnetic groups 31, and a diffuser plate 23 is provided on the first supporting bracket 211. One end of the first elastic arm 212 is connected to the first supporting bracket 211, and the other end of the first elastic arm 212 is connected to the substrate 10 to form an elastic connection. The second moving group 22 includes a second supporting bracket 221 and a second elastic arm 222. The opposite ends of the second supporting bracket 221 are respectively connected to two sets of second electromagnetic groups 32, and another diffuser plate 23 is provided on the second supporting bracket 221. One end of the second elastic arm 222 is connected to the second supporting bracket 221, and the other end of the second elastic arm 222 is connected to the substrate 10 to form an elastic connection.

[0035] Specifically, both the first support bracket 211 and the second support bracket 221 are provided with light-transmitting holes. The diffuser plate 23, the light-transmitting holes, and the through slot 11 are all correspondingly provided so that the light source can pass through the through slot 11, the light-transmitting holes, and the diffuser plate 23. The two electromagnetic groups can drive the two support brackets to move. When the first support bracket 211 moves, it will cause the first elastic arm 212 to deform, thereby causing the first support bracket 211 to undergo a slight displacement relative to the substrate 10. At the same time, when the second support bracket 221 moves, it will cause the second elastic arm 222 to deform, thereby causing the second support bracket 221 to undergo a slight displacement relative to the substrate 10. This changes the laser beam path and ensures that the laser beam can achieve a more uniform beam distribution when passing through the two diffusers 23, thus improving the speckle elimination effect.

[0036] Furthermore, in some embodiments of this application, such as Figure 6 As shown, each end of the first support bracket 211 is provided with a first elastic arm 212, which is adjacent to the first electromagnetic assembly 31 and extends in a straight line between the first support bracket 211 and the substrate 10. Similarly, each end of the second support bracket 221 is provided with a second elastic arm 222, which is adjacent to the second electromagnetic assembly 32 and extends in a straight line between the second support bracket 221 and the substrate 10. The linear elastic arms help reduce the overall volume of the speckle-reducing device 1 and simplify the manufacturing process, thus facilitating model design and reducing costs.

[0037] Specifically, taking the first support bracket 211 as an example, the periphery of the first support bracket 211 has a first end face, a second end face, a third end face, and a fourth end face connected in sequence. The first end face and the third end face are arranged opposite each other, and the second end face and the fourth end face are arranged opposite each other. The first end face and the third end face on the first support bracket 211 are respectively connected to the first electromagnetic group 31 and the second electromagnetic group 32. The second end face and the fourth end face on the first support bracket 211 are each provided with a first elastic arm 212. Therefore, the first elastic arm 212 is arranged adjacent to the first electromagnetic group 31 and the second electromagnetic group 32. The first elastic arms 212 are symmetrically arranged at opposite ends of the first support bracket 211 to ensure that the elastic force on the first support bracket 211 is evenly distributed, improve the deformation control accuracy, and thus enable the first support bracket 211 to remain stable during small displacements. The second support bracket 221 has the same structure as the first support bracket 211.

[0038] Among them, such as Figure 6As shown, both elastic arms extend in a straight line. For example, in the first moving group 21, when the first supporting bracket 211 is subjected to the force of the first electromagnetic group 31, the first supporting bracket 211 causes the first elastic arm 212 to deform, causing the first supporting bracket 211 and a diffuser plate 23 to move along the X-axis. At this time, the first elastic arm 212 in the first moving group 21 can extend in a straight line along the Y-axis, allowing the first elastic arm 212 in the first moving group 21 to deform more flexibly, so that the first supporting bracket 211... Moving in the X-axis direction; similarly, in the second moving group 22, when the second bearing support 221 is subjected to the force of the second electromagnetic group 32, the second bearing support 221 drives the second elastic arm 222 to deform, so that the second bearing support 221 and another diffuser 23 move in the Y-axis direction. At this time, the second elastic arm 222 in the second moving group 22 can extend in a straight line in the X-axis direction, so that the second elastic arm 222 in the second moving group 22 can deform more flexibly, so that the second bearing support 221 moves in the Y-axis direction.

[0039] In other embodiments, both elastic arms may extend in a curved shape to increase the flexibility of the elastic arm deformation and ensure that when the two support brackets undergo slight displacement relative to the substrate 10, a smoother deformation transition can be achieved through the elastic arms.

[0040] Furthermore, in some embodiments of this application, such as Figure 3 As shown, a fixing part 40 is provided at one end of the first elastic arm 212 connected to the substrate 10 and at one end of the second elastic arm 222 connected to the substrate 10. The fixing part 40 is fixedly connected to the side of the substrate 10 perpendicular to the optical axis Z. It can be understood that the fixing part 40 fixes the elastic arm to the side of the substrate 10, ensuring that the elastic arm remains stable during vibration and preventing displacement caused by vibration. The fixing part 40 can be a screw or a positioning post.

[0041] Secondly, this application also provides an optical engine, including a light source and a laser speckle removal device 1 as described in the above embodiments, wherein the light emitted by the light source passes through the laser speckle removal device 1.

[0042] In this embodiment, by optimizing the structural layout of the laser speckle elimination device 1, the overall structure of the laser speckle elimination device 1 is made more compact, making it easier to integrate the laser speckle elimination device 1 into the optomechanical system. At the same time, the light source of the optomechanical system can emit a laser beam. In this embodiment, the first electromagnetic group 31 in the laser speckle elimination device 1 drives the first moving group 21 to move, and the second electromagnetic group 32 drives the second moving group 22 to move. Moreover, the first moving group 21 and the second moving group 22 move in different directions, thereby enabling the optomechanical system to improve the effect of eliminating laser speckle and improve the clarity of the image.

[0043] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0044] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser speckle removal device, characterized in that, include: A substrate having a through groove extending along the optical axis. The driving assembly includes a first electromagnetic group and a second electromagnetic group, wherein at least a portion of the first electromagnetic group is disposed on the inner wall of the through groove and at least a portion of the second electromagnetic group is disposed on the inner wall of the through groove, or the first electromagnetic group and the second electromagnetic group are both disposed on the same side of the substrate perpendicular to the optical axis. The moving component includes a first moving group, a second moving group, and two diffuser sheets. The first moving group and the second moving group are both elastically connected to the substrate. The first moving group is connected to the first electromagnetic group, and the second moving group is connected to the second electromagnetic group. The two diffuser sheets are both disposed corresponding to the through slot. One diffuser sheet is fixed on the first moving group to move with the first moving group, and the other diffuser sheet is fixed on the second moving group to move with the second moving group. The first electromagnetic group is used to drive the first moving group to move, and the second electromagnetic group is used to drive the second moving group to move. The driving forces generated by the first electromagnetic group and the second electromagnetic group are in different directions.

2. The laser speckle removal device according to claim 1, characterized in that, Multiple mounting components are provided on the inner peripheral sidewall of the through groove; The first electromagnetic assembly includes a first coil and a first magnet, and the second electromagnetic assembly includes a second coil and a second magnet. The first coil is sleeved on one of the mounting components, and the second coil is sleeved on another mounting component. The central axis of both the first coil and the central axis of the second coil are perpendicular to the optical axis direction. The first magnet is connected to the side of the first moving group facing the first coil. The first magnet is arranged corresponding to the first coil. The first magnet is coupled with the first coil to generate a driving force to drive the first moving group to move along the first direction. The second magnet is connected to the side of the second moving group facing the second coil. The second magnet is arranged corresponding to the second coil. The second magnet is coupled with the second coil to generate a driving force to drive the second moving group to move along a second direction, which is different from the first direction.

3. The laser speckle removal device according to claim 2, characterized in that, The drive assembly includes two sets of first electromagnetic groups and two sets of second electromagnetic groups, with the two sets of first electromagnetic groups arranged opposite to each other and the two sets of second electromagnetic groups arranged opposite to each other. The two ends of the first moving group are respectively connected to two sets of the first electromagnetic groups, and the driving force generated by the two sets of the first electromagnetic groups is in the same direction; the two ends of the second moving group are respectively connected to two sets of the second electromagnetic groups, and the driving force generated by the two sets of the second electromagnetic groups is in the same direction.

4. The laser speckle removal device according to claim 1, characterized in that, The substrate has a first side surface perpendicular to the optical axis, and a plurality of mounting components are disposed on the first side surface; The first electromagnetic assembly includes a first coil and a first magnet, and the second electromagnetic assembly includes a second coil and a second magnet. The first coil is sleeved on one of the mounting components, and the second coil is sleeved on another mounting component. The central axis of both the first coil and the central axis of the second coil are parallel to the optical axis direction. The first magnet is connected to the side of the first moving group facing the substrate. The first magnet is disposed corresponding to the first coil. The first magnet is coupled with the first coil to generate a driving force to drive the first moving group to move in a third direction. The second magnet is connected to the side of the second moving group facing the substrate. The second magnet is arranged corresponding to the second coil. The second magnet and the second coil are coupled to generate a driving force to drive the second moving group to move along a fourth direction, which is different from the third direction.

5. The laser speckle removal device according to claim 4, characterized in that, The drive assembly includes two sets of first electromagnetic groups and two sets of second electromagnetic groups, which are arranged around the outer periphery of the through slot. The two ends of the first moving group are respectively connected to two sets of the first electromagnetic groups, and the driving force generated by the two sets of the first electromagnetic groups is in the same direction; the two ends of the second moving group are respectively connected to two sets of the second electromagnetic groups, and the driving force generated by the two sets of the second electromagnetic groups is in the same direction.

6. The laser speckle removal device according to claim 1, characterized in that, At least a portion of the first moving group and at least a portion of the second moving group are disposed in the through slot.

7. The laser speckle removal device according to any one of claims 2 to 6, characterized in that, Both the first moving group and the second moving group move in a plane perpendicular to the optical axis, and have mutually perpendicular X-axis and Y-axis directions on the plane perpendicular to the optical axis. The first moving group moves along the X-axis in a plane perpendicular to the optical axis, and the second moving group moves along the Y-axis in a plane perpendicular to the optical axis.

8. The laser speckle removal device according to claim 3 or 5, characterized in that, The first movable group includes a first support bracket and a first elastic arm. The two opposite ends of the first support bracket are respectively connected to two groups of the first electromagnetic group. The first support bracket is provided with a diffuser plate. One end of the first elastic arm is connected to the first support bracket, and the other end of the first elastic arm is connected to the substrate to form an elastic connection. The second movable group includes a second support bracket and a second elastic arm. The two ends of the second support bracket are respectively connected to two groups of the second electromagnetic group. Another diffuser plate is provided on the second support bracket. One end of the second elastic arm is connected to the second support bracket, and the other end of the second elastic arm is connected to the substrate to form an elastic connection.

9. The laser speckle removal device according to claim 8, characterized in that, The first elastic arm is provided at both ends of the first support bracket. The first elastic arm is arranged adjacent to the first electromagnetic group and extends in a straight line between the first support bracket and the substrate. The second elastic arm is provided at both ends of the second support bracket. The second elastic arm is arranged adjacent to the second electromagnetic group and extends in a straight line between the second support bracket and the substrate.

10. The laser speckle removal device according to claim 9, characterized in that, Both the end of the first elastic arm connected to the substrate and the end of the second elastic arm connected to the substrate are provided with a fixing part, which is fixedly connected to the side of the substrate perpendicular to the optical axis.

11. An optical engine, characterized in that, It includes a light source and a laser speckle removal device as described in any one of claims 1 to 10, wherein the light emitted by the light source passes through the laser speckle removal device.

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