Speckle eliminating structure and optical machine

Abstract

The utility model relates to a speckle eliminating structure which comprises a base, a first bearing module, at least one optical element and a first driving module. The first bearing module is borne on the base and comprises a first fixing piece, and the first fixing piece comprises a first fixing part and a second fixing part which are arranged in a spaced mode. The optical element is used for transmitting light of the light source and reducing coherence of the light. The optical element is fixed to one side of the first fixing piece. The first driving module comprises a first coil and two first magnets, the two first magnets are arranged in the first direction, one first magnet is fixed to the first fixing part, the other first magnet is fixed to the second fixing part, and the first coil is located between the two first magnets. The first magnet and the first coil are used for driving the first bearing module to move in the first direction relative to the base so that all the optical elements can move in the first direction relative to the base at the same time. The speckle eliminating mechanism provided by the utility model is beneficial to reducing speckles. The utility model further relates to an optical machine comprising the speckle eliminating structure.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular to a speckle-eliminating structure and an optical machine including the speckle-eliminating structure. Background Art

[0002] Current laser projection systems still suffer from speckle in their images. Due to the high coherence of laser light, static reflective diffusers or static transmissive diffusers are often used to reduce speckle. However, the speckle reduction effect of these optical components remains poor. Utility Model Content

[0003] The present application discloses a speckle elimination structure and an optical machine, which are beneficial for reducing speckle.

[0004] In a first aspect, the present application relates to a speckle elimination structure, comprising:

[0005] base;

[0006] A first carrying module, carried on the base, includes a first fixing member, wherein the first fixing member includes a first fixing portion and a second fixing portion that are spaced apart;

[0007] at least one optical element, the optical element being used to transmit light from a light source and reduce coherence of the light from the light source, the optical element being fixed to one side of the first fixing member; and

[0008] The first driving module includes a first coil and two first magnets, the two first magnets are arranged along a first direction, one first magnet is fixed to the first fixing part, and the other first magnet is fixed to the second fixing part, the first coil is located between the two first magnets, and the first magnet and the first coil are used to drive the first carrying module to move relative to the base along the first direction so that all the optical elements move simultaneously relative to the base along the first direction.

[0009] The speckle reduction structure provided in embodiments of the present application utilizes a first fixing member to secure at least one optical element. The optical element is configured to transmit light from a light source and reduce its coherence, thereby spatially reducing the coherence of the light source light after passing through the speckle reduction mechanism, thereby reducing speckle in an image projected by an optical machine using the speckle reduction mechanism. Furthermore, a first magnet and a first coil are provided to drive the first carrier module to move relative to the base in a first direction, thereby simultaneously moving all of the optical elements relative to the base in the first direction. The first coil is positioned between two of the first magnets. Compared to a motor-driven approach, this structure reduces noise during the operation of the speckle reduction mechanism and improves the user experience of an optical machine using the speckle reduction mechanism. Furthermore, when light passes through the moving optical element, the light generates more random phases, further reducing the coherence of the light source light. This reduces the temporal coherence of the light source light after passing through the speckle reduction mechanism, thereby further reducing speckle in an image projected by an optical machine using the speckle reduction mechanism.

[0010] In one embodiment, the first coil is used to generate a first induced magnetic field; the two first magnets are used to generate a first constant magnetic field; and the directions of the first induced magnetic field and the first constant magnetic field are parallel to the first direction.

[0011] In one embodiment, the first carrying module further includes at least one first elastic member, the first elastic member is connected to the first fixing member, and the first elastic member is configured to be deformable along the first direction so that the first fixing member moves relative to the base.

[0012] In one embodiment, the speckle-eliminating structure further includes a second supporting module, which is supported on the base on the same side as the first supporting module, and the second supporting module includes at least one second elastic member and a second fixing member, the second fixing member is connected to the second elastic member and the first supporting module, the second elastic member is connected to the base and the second fixing member, and the second elastic member is configured to be deformable along a second direction so that the second fixing member moves relative to the base, and the second direction is perpendicular to the first direction.

[0013] In one embodiment, the second fixing member includes a third fixing portion and a fourth fixing portion spaced apart from each other; the speckle elimination structure further includes a second driving module disposed on the same side as the second supporting module, the second driving module including a second coil and two second magnets;

[0014] Two second magnets are arranged along the second direction, one second magnet is fixed to the third fixing part, and the other second magnet is fixed to the fourth fixing part. The second coil is located between the two second magnets. The second magnet and the second coil are used to drive the second carrier module to move relative to the base along the second direction so that all the optical elements move simultaneously relative to the base along the second direction.

[0015] In one embodiment, the second coil is used to generate a second induced magnetic field; the two second magnets are used to generate a second constant magnetic field; and the direction of the second induced magnetic field and the direction of the second constant magnetic field are parallel to the second direction.

[0016] In one embodiment, the first magnet and the second magnet are any one of a permanent magnet, a piezoelectric ceramic, a powered solenoid, and a powered coil.

[0017] In one embodiment, the base includes a plate body, and a first fixing protrusion and a second fixing protrusion extending from the plate body in a direction away from the plate body, wherein the first fixing protrusion is used to fix the first coil, and the first fixing protrusion to which the first coil is fixed is arranged between the first fixing portion and the second fixing portion;

[0018] The second fixing protrusion is used to fix the second coil, and the second fixing protrusion to which the second coil is fixed is arranged between the third fixing portion and the fourth fixing portion.

[0019] In one embodiment, the speckle elimination mechanism further includes a circuit board, which is disposed on the base and configured to be electrically connected to the first driving module and the second driving module and to supply power to the first driving module and the second driving module.

[0020] In one embodiment, the first fixing member fixes a first optical element and a second optical element stacked along the direction of light beam penetration, the first optical element is a transmissive diffuser, and the second optical element is a depolarization prism; or the first optical element is a depolarization prism, and the second optical element is a transmissive diffuser.

[0021] In a second aspect, the present application relates to an optical machine, comprising:

[0022] a light source module, configured to emit light from a light source; and

[0023] As described in any of the above embodiments, the speckle-eliminating structure is used to receive and emit light from the light source.

[0024] The optical machine provided in the embodiments of the present application, by providing the speckle elimination structure described in any of the above embodiments, is conducive to spatially reducing the coherence of the light source light after passing through the speckle elimination mechanism when the light source light passes through at least the optical element, thereby helping to reduce the speckle of the image projected by the optical machine; and by providing a first magnet and a first coil to drive the first carrier module to move relative to the base along the first direction so that all the optical elements move simultaneously relative to the base along the first direction, the first coil is located between the two first magnets. Compared with the motor-driven driving method, this is conducive to reducing the noise during the operation of the speckle elimination mechanism and improving the user experience of the optical machine. Moreover, when the light passes through the moving optical element, since the light will generate more random phases, the coherence of the light source light can be further reduced, which is conducive to temporally reducing the coherence of the light source light after passing through the speckle elimination mechanism, thereby helping to further reduce the speckle of the projected image of the optical machine, and further helping to improve the display effect of the optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 Schematic diagram of the structure of the speckle elimination structure in one embodiment of the present application.

[0027] Figure 2 yes Figure 1 Exploded structure diagram.

[0028] Figure 3 Schematic diagram of the structure of the second optical element in one embodiment of the present application.

[0029] Figure 4 It is a structural diagram of an optical machine in one embodiment of the present application.

[0030] Description of main component symbols

[0031] Speckle elimination structure 100

[0032] Base 1

[0033] Board 11

[0034] Fixed protrusion 13

[0035] Fixed via 13a

[0036] First fixing protrusion 131

[0037] Second fixing protrusion 133

[0038] First carrier module 2

[0039] First fixing member 21

[0040] First ontology 211

[0041] First fixing portion 213

[0042] Second fixing portion 215

[0043] First elastic member 23

[0044] Optical element 3

[0045] First optical element 31

[0046] Second optical element 33

[0047] First wedge prism 331

[0048] Inclined surfaces 331a, 333a

[0049] Vertical surfaces 331b, 333b

[0050] Optical axes 3311c, 333c

[0051] Second wedge prism 333

[0052] Thickness d1

[0053] First driving module 4

[0054] First coil 41

[0055] First magnet 43

[0056] Second carrier module 5

[0057] Second fixing member 51

[0058] Second body 511

[0059] The third fixing portion 513

[0060] Fourth fixing portion 515

[0061] Second elastic member 53

[0062] Second driving module 6

[0063] Second coil 61

[0064] Second magnet 63

[0065] Circuit board 7

[0066] Optical Engine 900

[0067] Light source module 91

[0068] First direction X

[0069] Second direction Y

[0070] Beam penetration direction Z

[0071] Light source L1 DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0073] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly attached to the other component or there may be a central component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0074] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0075] The names of the messages or information exchanged between multiple devices in the embodiments of the present application are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0076] The images projected by laser projection equipment are prone to speckle problems. One solution is to set a single dynamic transmission diffuser at the light output position of each light source module of the projection device. However, the diffusion angle of the above-mentioned dynamic transmission diffuser is often too small, making it difficult to significantly reduce the coherence of the light source, that is, it is difficult to achieve the purpose of eliminating speckle. Another solution is to further reduce the coherence of the light source by adjusting the vibration mode, vibration amplitude and vibration frequency of the dynamic transmission diffuser. However, with the change of vibration mode, vibration amplitude and vibration frequency, not only the volume of the optical machine will increase, but also the cost of the projection equipment and the noise during the operation of the projection equipment will increase, thereby affecting the user experience.

[0077] Please also refer to Figure 1and Figure 2 The speckle elimination structure 100 of the embodiment of the present application includes a base 1, a first carrying module 2, at least one optical element 3, a first driving module 4, a second carrying module 5 and a second driving module 6.

[0078] The base 1 includes a plate 11 and a plurality of fixing protrusions 13 extending from the plate 11 toward one side and approximately perpendicular to the plate 11. The fixing protrusions 13 include a first fixing protrusion 131 and a second fixing protrusion 133. The first fixing protrusion 131 is used to fix the first driver module 4, and the second fixing protrusion 133 is used to fix the second driver module 6. Each fixing protrusion 13 defines a fixing hole 13a, through which the base 1 and the second supporting module 5 can be screwed. When the speckle-reducing structure 100 is used in the optical engine of a projection device, the speckle-reducing structure 100 and the optical engine housing (not shown) can also be screwed together through the fixing holes 13a. The base 1 has a generally plate-shaped structure. The base 1 can be made of any of metal, glass, and plastic.

[0079] The first supporting module 2 is supported on the base 1 and includes a first fixing member 21 and at least one first elastic member 23. The first fixing member 21 includes a first body 211 and a first fixing portion 213 and a second fixing portion 215 that are spaced apart. In this embodiment, the first fixing portion 213 and the second fixing portion 215 extend from one end of the first body 211. In other embodiments, the first fixing portion 213 and the second fixing portion 215 can be two ends spaced apart on the first body 211, and this application does not limit this. The first elastic member 23 is connected to the first fixing member 21, and the first elastic member 23 is configured to be deformable along the first direction X so that the first fixing member 21 moves relative to the base 1.

[0080] The optical element 3 is used to transmit the light source L1 and reduce the coherence of the light source L1. The optical element 3 is fixed to one side of the first fixing member 21. In this embodiment, the first fixing member 21 fixes the first optical element 31 and the second optical element 33, which are stacked along the light beam transmission direction Z. In other embodiments, the first fixing member 21 may also fix one or more optical elements 3 arranged along the light beam transmission direction Z.

[0081] In this embodiment, the first optical element 31 is a transmissive diffuser, and the second optical element 33 is a depolarizing prism. Both the first optical element 31 and the second optical element 33 are arranged opposite the first light-transmitting portion along the beam transmission direction Z. The first optical element 31 includes a main body (not shown) and a diffusion layer (not shown) disposed on either side of the main body. The diffusion layer is used to receive light and reduce the coherence of the incident light before emitting it. By providing a transmissive diffuser, the emitted light exhibits a Lambertian distribution, which helps further reduce the coherence of the light source L1.

[0082] See also Figure 3 The second optical element 33 includes a first wedge-shaped prism 331 and a second wedge-shaped prism 333. The inclined surface 331a of the first wedge-shaped prism 331 and the inclined surface 333a of the second wedge-shaped prism 333 are in contact with each other. The optical axis of the first wedge-shaped prism 331 is defined as a first optical axis 331c, and the optical axis of the second wedge-shaped prism 333 is defined as a second optical axis 333c. The angle between the first optical axis 331c and the second optical axis 333c is 45°±1°. For example, the angle between the first optical axis 331c and the second optical axis 333c can be any value of 44°, 45°, or 46°. When the angle between the first optical axis 331c and the second optical axis 333c is 45°±1°, the effect of eliminating speckles after the light source light L1 passes through the first wedge-shaped prism 331 and the second wedge-shaped prism 333 is the best. In practical applications, there may be a certain error in the angle between the first optical axis 331c and the second optical axis 333c, and this application does not impose any restrictions on this.

[0083] Specifically, the first wedge-shaped prism 331 further includes a vertical surface 331b. The inclined surface 331a is inclined relative to the vertical surface 331b. A wedge angle is formed between the vertical surface 331b and the inclined surface 331a. The second wedge-shaped prism 333 further includes a vertical surface 333b. The inclined surface 333b is inclined relative to the vertical surface 333b. A wedge angle is formed between the vertical surface 333b and the inclined surface 333b. When the inclined surface 331a of the first wedge-shaped prism 331 and the inclined surface 333b of the second wedge-shaped prism 333 are in contact with each other, the vertical surface 331b of the first wedge-shaped prism 331 and the vertical surface 333b of the second wedge-shaped prism 333 are parallel to each other. In other words, the wedge angles of the first wedge-shaped prism 331 and the second wedge-shaped prism 333 are equal. The light source light L1 is vertically incident on the first wedge-shaped prism 331 from the vertical surface 331 b and is vertically emitted from the vertical surface 333 b of the second wedge-shaped prism 333 .

[0084] Taking the first wedge-shaped prism 331 as an example, the distance between the vertical surface 331b and the inclined surface 331a is defined as the thickness of the first wedge-shaped prism 331. Because the inclined surface 331a is inclined (non-parallel) relative to the vertical surface 331b, the first wedge-shaped prism 331 has different thicknesses at different locations. Because the beam cross-section of the light source L1 has a certain size, different light rays in the light source L1 beam enter and exit from different locations of the first wedge-shaped prism 331. Thus, different light rays in the light source L1 beam pass through the first wedge-shaped prism 331 of different thicknesses. This results in different optical path lengths between the vertical surface 331b and the inclined surface 331a for light rays at different locations in the light source L1 beam. Therefore, different light rays in the light source L1 beam that pass through the first wedge-shaped prism 331 experience different phase delays, which helps to spatially reduce the coherence of the light source L1. Furthermore, by setting up the first driving module 4 and the second driving module 6 to drive the optical element 3 to move simultaneously relative to the base 1 at least along the first direction X, since the light source light L1 at the same position at different times further produces different phase delays, it is beneficial to further reduce the coherence of the light source light L1 in time.

[0085] Please refer to Figure 1 and Figure 2 In other embodiments, the first optical element 31 may be a depolarizing prism, and the second optical element 33 may be a transmissive diffuser, which is not limited in this application.

[0086] The first driving module 4 includes a first coil 41 and two first magnets 43. The two first magnets 43 are arranged along a first direction X. One first magnet 43 is fixed to the first fixing portion 213, and the other first magnet 43 is fixed to the second fixing portion 215. The first coil 41 is located between the two first magnets 43. The first magnet 43 and the first coil 41 are used to drive the first carrier module 2 to move relative to the base 1 along the first direction X, thereby simultaneously moving all optical elements 3 relative to the base 1 along the first direction X. The first coil 41 is used to generate a first induced magnetic field; the two first magnets 43 are used to generate a first constant magnetic field. The direction of the first induced magnetic field and the direction of the first constant magnetic field are parallel to the first direction X. Due to errors that may occur during the manufacturing process, the directions of the first induced magnetic field and the first constant magnetic field may not be strictly parallel (i.e., they may be approximately parallel). The directions of the first induced magnetic field and the first constant magnetic field are considered parallel if the parallelism error between the directions of the first constant magnetic field and the first induced magnetic field is less than 1°. Parallelism refers to the degree of parallelism between the directions of the first induced magnetic field and the first constant magnetic field. By setting the directions of the first induced magnetic field and the first constant magnetic field to be parallel to the first direction X, the driving force generated by the first coil 41 and the first magnet 43 is enhanced, thereby facilitating the reduction of power consumption of the speckle de-speckle structure 100 .

[0087] The first fixing protrusion 131 is used to fix the first coil 41. The fixing protrusion 131 with the first coil 41 fixed thereto is disposed between the first fixing portion 213 and the second fixing portion 215. The first magnet 43 is any one of a permanent magnet, a piezoelectric ceramic, a energized solenoid, and a energized coil.

[0088] The speckle-de-speckle structure 100 also includes a second carrier module 5, which is supported on the same side of the base 1 as the first carrier module 2. The second carrier module 5 includes at least one second elastic member 53 and a second fixing member 51. The second fixing member 51 is connected to the second elastic member 53 and the first carrier module 2. The second fixing member 51 includes a second body 511 and a third fixing portion 513 and a fourth fixing portion 515 spaced apart. In this embodiment, the third fixing portion 513 and the fourth fixing portion 515 extend from one end of the first body 211. In other embodiments, the third fixing portion 513 and the fourth fixing portion 515 may be spaced apart at two ends of the first body 211, which is not a limitation of this application. The second elastic member 53 connects the base 1 and the second fixing member 51 and is configured to deform along a second direction Y perpendicular to the first direction X, thereby enabling the second fixing member 51 to move relative to the base 1.

[0089] The speckle-eliminating structure 100 further includes a second driving module 6 disposed on the same side as the second carrier module 5. The second driving module 6 includes a second coil 61 and two second magnets 63. The two second magnets 63 are arranged along the second direction Y, with one second magnet 63 fixed to the third fixing portion 513 and the other second magnet 63 fixed to the fourth fixing portion 515. The second coil 61 is located between the two second magnets 63. The second magnets 63 and the second coil 61 are used to drive the second carrier module 5 to move relative to the base 1 along the second direction Y, thereby simultaneously moving all optical elements 3 along the second direction Y relative to the base 1.

[0090] The second coil 61 is used to generate a second induced magnetic field; the two second magnets 63 are used to generate a second constant magnetic field. The direction of the second induced magnetic field and the direction of the second constant magnetic field are parallel to the second direction Y. Due to errors that may occur during the processing, the directions of the second induced magnetic field and the second constant magnetic field may not be strictly parallel (i.e., they may be approximately parallel). If the parallelism error between the directions of the second constant magnetic field and the second induced magnetic field is less than 1°, the second induced magnetic field and the second constant magnetic field are considered parallel. Parallelism refers to the degree of parallelism between the directions of the second induced magnetic field and the second constant magnetic field. By setting the directions of the second induced magnetic field and the second constant magnetic field parallel to the second direction Y, the driving force generated by the second coil 61 and the second magnet 63 is enhanced, thereby reducing the power consumption of the speckle de-speckle structure 100. The second fixing protrusion 133 is used to fix the second coil 61. The second fixing protrusion 133, to which the second coil 61 is fixed, is disposed between the third fixing portion 513 and the fourth fixing portion 515. The second magnet 63 can be any one of a permanent magnet, a piezoelectric ceramic, a energized solenoid, and a energized coil.

[0091] The speckle elimination mechanism further includes a circuit board 7 , which is disposed on the base 1 . The circuit board 7 is configured to be electrically connected to the first driving module 4 and the second driving module 6 and to supply power to the first driving module 4 and the second driving module 6 .

[0092] The speckle reduction structure 100 provided in the embodiment of the present application is provided with a first fixing member 21 to fix at least one optical element 3. The optical element 3 is used to transmit the light source light L1 and reduce the coherence of the light source light L1, which is beneficial to spatially reduce the coherence of the light source light L1 after passing through the speckle reduction mechanism, thereby facilitating the reduction of the speckle of the projected image of the optical machine 900 using the speckle reduction mechanism; and the first magnet 43 and the first coil 41 are provided to drive the first carrier module 2 to move relative to the base 1 along the first direction X so that all the optical elements 3 are simultaneously moved relative to the base 1 along the first direction X. The first coil 41 is located between the two first magnets 43. Compared with the motor-driven driving method, it is beneficial to reduce the noise during the operation of the speckle elimination mechanism 100, and is beneficial to improving the user experience of the optical machine using the speckle elimination mechanism 100. When the light passes through the moving optical element 3, the light will produce more random phases, which can further reduce the coherence of the light source light L1, which is beneficial to temporally reduce the coherence of the light source light L1 after passing through the speckle elimination mechanism, and further help to further reduce the speckle of the projected image of the optical machine 900 using the speckle elimination mechanism.

[0093] See also Figure 1 and Figure 4The optical engine 900 of the embodiment of the present application includes a light source module 91 and a speckle reduction mechanism. The light source module 91 is used to emit light source light L1. The speckle reduction mechanism 100 is used to receive and emit light source light L1.

[0094] The optical engine 900 also includes a light homogenizing component (not shown), a light valve (not shown) and a lens component (not shown). The light homogenizing component is arranged on the side of the speckle elimination mechanism that emits the light source L1. The light homogenizing component is used to receive the light source light L1 emitted from the speckle elimination mechanism and homogenize the light source light L1. By setting the light homogenizing component, it is not only beneficial to uniformize the light intensity of the light source light L1 but also to achieve a good speckle elimination effect. The light valve is arranged on the light output side of the light homogenizing component and is used to receive the light source light L1 after homogenization and modulate the light source light L1 into image light (not shown). The light valve can be any one of a liquid crystal display imaging device (Liquid Crystal Display, LCD), a digital micro-mirror device (Digital Micro-mirror Device, DMD) and a liquid crystal on silicon device (Liquid Crystal on Silicon, LCOS). The lens component is used to receive the image light emitted from the light valve and project the image light out at a certain magnification.

[0095] The optical engine 900 provided in the embodiments of the present application, by providing the speckle reduction structure 100 of any of the aforementioned embodiments, is advantageously used to spatially reduce the coherence of the light source light L1 after passing through the speckle reduction mechanism when the light source light L1 passes through at least one optical element 3, thereby facilitating the reduction of speckle in the image projected by the optical engine 900. Furthermore, by providing the first magnet 43 and the first coil 41 to drive the first carrier module 2 to move relative to the base 1 in the first direction X, thereby simultaneously moving all the optical elements 3 relative to the base 1 in the first direction X, with the first coil 41 located between the two first magnets 43, this is advantageously used to reduce noise during the operation of the speckle reduction mechanism 100 compared to a motor-driven drive method, thereby improving the user experience of the optical engine 900. Furthermore, when light passes through the moving optical element 3, the light generates more random phases, further reducing the coherence of the light source light L1, thereby facilitating the temporal reduction of the coherence of the light source light L1 after passing through the speckle reduction mechanism, thereby further reducing speckle in the image projected by the optical engine 900, thereby improving the display quality of the optical engine 900.

[0096] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A speckle elimination structure, characterized in that: include: base; A first carrying module, carried on the base, includes a first fixing member, wherein the first fixing member includes a first fixing portion and a second fixing portion that are spaced apart; at least one optical element, the optical element being used to transmit light from a light source and reduce coherence of the light from the light source, the optical element being fixed to one side of the first fixing member; as well as The first driving module includes a first coil and two first magnets, the two first magnets are arranged along a first direction, one first magnet is fixed to the first fixing part, and the other first magnet is fixed to the second fixing part, the first coil is located between the two first magnets, and the first magnet and the first coil are used to drive the first carrying module to move relative to the base along the first direction so that all the optical elements move simultaneously relative to the base along the first direction.

2. The speckle elimination structure according to claim 1, wherein: The first coil is used to generate a first induced magnetic field; the two first magnets are used to generate a first constant magnetic field; the directions of the first induced magnetic field and the first constant magnetic field are parallel to the first direction.

3. The speckle elimination structure according to claim 1, wherein: The first carrying module further includes at least one first elastic member, the first elastic member is connected to the first fixing member, and the first elastic member is configured to be deformable along the first direction so as to enable the first fixing member to move relative to the base.

4. The speckle elimination structure according to claim 1, wherein: The speckle-eliminating structure also includes a second carrying module, which is carried on the base on the same side as the first carrying module. The second carrying module includes at least one second elastic member and a second fixing member. The second fixing member is connected to the second elastic member and the first carrying module. The second elastic member is connected to the base and the second fixing member. The second elastic member is configured to be deformable along a second direction so that the second fixing member moves relative to the base. The second direction is perpendicular to the first direction.

5. The speckle elimination structure according to claim 4, wherein: The second fixing member includes a third fixing portion and a fourth fixing portion that are spaced apart from each other; the speckle elimination structure further includes a second driving module that is disposed on the same side as the second supporting module, and the second driving module includes a second coil and two second magnets; Two second magnets are arranged along the second direction, one second magnet is fixed to the third fixing part, and the other second magnet is fixed to the fourth fixing part. The second coil is located between the two second magnets. The second magnet and the second coil are used to drive the second carrier module to move relative to the base along the second direction so that all the optical elements move simultaneously relative to the base along the second direction.

6. The speckle elimination structure according to claim 5, wherein: The second coil is used to generate a second induced magnetic field; the two second magnets are used to generate a second constant magnetic field; the direction of the second induced magnetic field and the direction of the second constant magnetic field are parallel to the second direction.

7. The speckle elimination structure according to claim 5, wherein: The first magnet and the second magnet are any one of a permanent magnet, a piezoelectric ceramic, a powered solenoid, and a powered coil.

8. The speckle elimination structure according to claim 5, wherein: The base includes a plate body, and a first fixing protrusion and a second fixing protrusion extending from the plate body in a direction away from the plate body, wherein the first fixing protrusion is used to fix the first coil, and the first fixing protrusion to which the first coil is fixed is arranged between the first fixing portion and the second fixing portion; The second fixing protrusion is used to fix the second coil, and the second fixing protrusion to which the second coil is fixed is arranged between the third fixing portion and the fourth fixing portion.

9. The speckle elimination structure according to claim 5, wherein: The speckle elimination structure further includes a circuit board, which is disposed on the base and configured to be electrically connected to the first driving module and the second driving module and to supply power to the first driving module and the second driving module.

10. The speckle elimination structure according to claim 1, wherein: The first fixing member fixes a first optical element and a second optical element stacked along the direction of light beam penetration, wherein the first optical element is a transmissive diffuser and the second optical element is a depolarizing prism; or the first optical element is a depolarizing prism and the second optical element is a transmissive diffuser.

11. An optical machine, characterized in that: include: A light source module, used for emitting light from a light source; as well as The speckle-eliminating structure according to any one of claims 1 to 10, wherein the speckle-eliminating structure is configured to receive and emit light from the light source.

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