Dynamic speckle elimination device and light source

Abstract

The utility model provides a dynamic speckle eliminating device and a light source. The dynamic speckle eliminating device comprises a base, an elastic piece, an actuating assembly and a scattering piece. An elastic piece capable of deforming relative to a base is arranged on the base, a stator assembly in an actuating assembly is arranged on the base, a mover assembly is arranged on the elastic piece, the mover assembly has a first vibration mode and a second vibration mode, and the mover assembly and the stator assembly can be mutually coupled to drive a scattering piece arranged on the mover assembly to vibrate. According to the dynamic speckle elimination device provided by the embodiment of the utility model, the mover assembly has two vibration modes, namely the first vibration mode and the second vibration mode, so that the speckle elimination effect is realized, and only one mover assembly needs to be arranged, so that the dynamic speckle elimination device provided by the embodiment of the invention has the characteristics of small size and simple structure; the problem that a dynamic speckle elimination device in the prior art is large in size is solved. The size of the light source can also be reduced by applying the dynamic speckle eliminating device to the light source.

Description

Technical Field

[0001] This application relates to the technical field of light sources, and more particularly, to a dynamic speckle dissipation device and a light source. Background Art

[0002] Projection systems using lasers as lighting solutions have advantages such as a wide color gamut and low power consumption. However, due to the coherence caused by the narrow wavelength of the laser, serious speckle problems occur in the image, affecting the viewing effect.

[0003] Existing speckle solutions usually use dynamic devices or rotating motors to drive optical elements to vibrate to reduce speckles, but there are problems such as large volume and high power consumption, making it difficult to apply to micro-optical engines. Moreover, existing dynamic speckle dissipation devices usually require two-direction driving mechanisms for two-direction movement, resulting in complex designs of dynamic speckle dissipation devices and further increasing the volume of dynamic speckle dissipation devices. Summary of the Utility Model

[0004] Embodiments of this application propose a dynamic speckle dissipation device and a light source to at least partially address the above problems.

[0005] Embodiments of this application are implemented through the following technical solutions.

[0006] On the one hand, embodiments of this application provide a dynamic speckle dissipation device, including: a base, a spring piece, an actuating component, and a scattering member. The spring piece is disposed on the base and can deform relative to the base. The actuating component includes a stator component and a rotor component coupled to each other. The stator component is disposed on the base, and the rotor component is disposed on the spring piece. The rotor component has a first vibration mode and a second vibration mode. The scattering member is disposed on the rotor component.

[0007] In some embodiments, the stator component is a coil, and the rotor component is a magnetic body.

[0008] In some embodiments, the first vibration mode is a vibration mode along the axis direction of the coil, and the second vibration mode is a swinging motion mode centered on the axis direction of the coil.

[0009] In some embodiments, the coil is configured to generate a driving signal after being energized. The driving signal includes a first driving signal and / or a second driving signal. The frequency of the first driving signal is the same as the vibration frequency of the first vibration mode, and the frequency of the second driving signal is the same as the vibration frequency of the second vibration mode.

[0010] In some embodiments, the first driving signal I 1 Satisfies: I 1 = k 1× sin(2π × f 1 × t), the second drive signal I 2 satisfies: I 2 = k 2 × sin(2π × f 2 × t), where k 1 is the amplitude of the first signal, f 1 is the frequency of the first sine wave signal, k 2 is the amplitude of the second signal, f 2 is the frequency of the second sine wave signal, and t is time.

[0011] In some embodiments, the base is convexly provided with at least two limiting posts, the two limiting posts are spaced apart, and the elastic piece is detachably arranged on the limiting posts.

[0012] In some embodiments, the height of the limiting post protruding from the base is greater than the height of the stator assembly protruding from the base, and the rotor assembly is detachably arranged on the surface of the elastic piece away from the base.

[0013] In some embodiments, the frequencies of the first drive signal and the second drive signal are from 100 Hz to 1000 Hz.

[0014] In some embodiments, the first drive signal and / or the second drive signal is a square wave signal.

[0015] In some embodiments, the scattering member includes: a support base and a scattering sheet, the support base is arranged on the rotor assembly, and the scattering sheet is arranged on the support base.

[0016] In some embodiments, the support base is provided with a mounting groove, and the scattering sheet is detachably arranged in the mounting groove.

[0017] On the other hand, the embodiment of the present application further provides a light source, including a light-emitting component and the dynamic speckle dissipation device as described above, the light-emitting component is used to emit light, and the scattering member is located on the light path of the light source.

[0018] The dynamic speckle dissipation device provided by the embodiment of the present application is configured by arranging an elastic sheet on a base that can deform relative to the base, and disposing a stator assembly in the actuator assembly on the base and a mover assembly on the elastic sheet. The mover assembly has a first vibration mode and a second vibration mode, and the mover assembly and the stator assembly can be coupled to drive the scatterer disposed on the mover assembly to vibrate, thereby achieving the effect of eliminating speckles. Specifically, in the embodiment of the present application, since the mover assembly has a total of two vibration modes, namely the first vibration mode and the second vibration mode, the scatterer can be driven to vibrate in the vibration direction of the first vibration mode and / or in the vibration direction of the second vibration mode, thereby achieving the effect of eliminating speckles. Since only one mover assembly needs to be provided, the dynamic speckle dissipation device provided by the embodiment of the present application has the characteristics of small volume and simple structure, and solves the problem of large volume of the dynamic speckle dissipation device in the prior art. Applying the above dynamic speckle dissipation device to a light source can also reduce the volume of the light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings without creative efforts based on these drawings.

[0020] Figure 1 FIG. shows a structural block diagram of a light source provided by an embodiment of the present application.

[0021] Figure 2 FIG. shows a schematic structural diagram of a dynamic speckle dissipation device provided by an embodiment of the present application.

[0022] Figure 3 FIG. shows an exploded view of a dynamic speckle dissipation device provided by an embodiment of the present application.

[0023] Figure 4 FIG. shows a schematic diagram of a dynamic speckle dissipation device provided by an embodiment of the present application in one vibration mode.

[0024] Figure 5 FIG. shows a schematic diagram of a dynamic speckle dissipation device provided by an embodiment of the present application in another vibration mode.

[0025] Figure 6 FIG. shows a waveform diagram of a first drive signal supplied by a power supply circuit to a coil when a mover assembly vibrates in a first vibration mode provided by an embodiment of the present application.

[0026] Figure 7The waveform diagram of the first driving signal supplied by the power supply circuit to the coil when the mover assembly provided in an embodiment of the present application vibrates in the second vibration mode is shown.

[0027] Figure 8 The waveform diagram of the total driving signal supplied by the power supply circuit to the coil when the mover assembly provided in an embodiment of the present application vibrates in the first vibration mode and the second vibration mode simultaneously is shown. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0030] The projection system using laser as the illumination solution has advantages such as a wide color gamut and low power consumption. However, due to the coherence caused by the narrow wavelength of the laser, there are serious speckle problems in the picture, affecting the viewing effect.

[0031] Existing speckle solutions usually use dynamic devices or rotating motors to drive optical elements to vibrate to reduce speckle, but there are problems such as large volume and high power consumption, and it is difficult to apply them to micro-optical engines. And existing dynamic speckle reduction devices usually require two driving mechanisms for two-directional movement. Generally speaking, the above two directions are two mutually perpendicular directions in the plane, and each driving mechanism controls the reciprocating movement in one direction respectively to make the scattering device swing, thereby eliminating speckle. However, this will lead to a complex design of the dynamic speckle reduction device and further increase the volume of the dynamic speckle reduction device.

[0032] Based on the above problems, please refer to Figure 1 , an embodiment of the present application provides a light source 1, which has the characteristics of small volume, low power consumption, and significant speckle suppression effect. Specifically, the light source 1 may include a dynamic speckle reduction device 10 and a light emitting component 20.

[0033] The light emitting component 20 can be used to emit light. For example, in one embodiment, the light emitting component 20 can be used to emit three-color laser. Three-color laser display has advantages such as a wide color gamut and high brightness, and is beneficial to the miniaturization of the volume of the light source 1.

[0034] Please refer to Figure 1 andFigure 2 As shown in Figure 2 , the dynamic speckle dissipation device 10 may include a base 110, a spring piece 120, an actuating assembly 130, and a scattering member 140. The actuating assembly 130 may include a stator assembly 131 and a rotor assembly 132. The rotor assembly 132 may be connected to the scattering member 140, and the stator assembly 131 may be coupled with the rotor assembly 132 so that the rotor assembly 132 vibrates, thereby driving the scattering member 140 to vibrate. The dynamic speckle dissipation device 10 may be disposed on the light-emitting path of the light-emitting assembly 20 to eliminate speckles.

[0035] Specifically, in this embodiment, the base 110 may serve as the support structure of the entire dynamic speckle dissipation device 10. The specific material of the base 110 is not limited in the embodiments of the present application. For example, high-hardness plastics or resins may be used for support to meet the sufficient structural strength for supporting the spring piece 120, the actuating assembly 130, and the scattering member 140. The specific shape of the base 110 is also not limited in the embodiments of the present application. For example, in one embodiment, the base 110 may be set to a regular structure, and in other embodiments, the base 110 may also be set to other irregular shapes, which may be specifically set according to actual situations.

[0036] Please also refer to Figure 2 and Figure 3 In the embodiments of the present application, the specific structure of the base 110 is also not limited. For example, in one embodiment, the base 110 may be provided with a limiting post 111 for fixing the spring piece 120. The spring piece 120 may be disposed on the base 110, specifically on the limiting post 111, and may be deformed relative to the base 110. When the spring piece 120 is subjected to an external force, it may undergo elastic deformation relative to the base 110, and when the external force is removed, the spring piece 120 may recover its elastic deformation.

[0037] In a more specific embodiment, there may be two limiting posts 111. The two limiting posts 111 may be set to the same structure and may be spaced apart so that the spring piece 120 is in a suspended state when disposed on the limiting posts 111, thereby enabling the spring piece 120 to have sufficient deformation space.

[0038] The specific structure of the spring piece 120 is not limited in the embodiments of the present application. Continuing from the foregoing, for example, in one embodiment, the spring piece 120 may be set to a symmetric structure. Specifically, the spring piece 120 may include a limiting portion 121, a bearing portion 122, and an elastic portion 123. The bearing portion 122 may be used to bear the rotor assembly 132 and may be used to mount the rotor assembly 132.

[0039] In this embodiment, in order to ensure that the mover assembly 132 can be accurately installed and fixed on the shrapnel 120, an installation position 122 can be provided on the shrapnel 120. The installation position 122 can be used to guide the user to install the mover assembly 132 on the shrapnel 120 and ensure the accuracy of the mover assembly 132 during installation. The specific form of the installation position 122 is not limited in the embodiments of the present application. For example, the installation position 122 of the shrapnel 120 can have a specific shape structure, or for another example, the installation position 122 of the shrapnel 120 can have a specific color, etc. to play a prompting role.

[0040] Two limiting parts 121 can be provided. The two limiting parts 121 can be respectively arranged at both ends of the bearing part 122. In this embodiment, the limiting part 121 can be a limiting hole that cooperates with the limiting column 111. Each limiting column 111 can respectively pass through a limiting hole to realize the fixed connection between the shrapnel 120 and the base 110.

[0041] The embodiments of the present application do not limit the specific cooperation method between the limiting column 111 and the limiting part 121. For example, in one implementation, the end of the limiting column 111 can be provided with a conical or conical-like structure, which can make it more convenient for the connection between the limiting column 111 and the limiting hole. Specifically, the above-mentioned conical or conical-like structure can play a guiding role in the connection between the limiting column 111 and the limiting hole.

[0042] In addition, the diameter of the limiting column 111 can be slightly larger than the diameter of the limiting hole, so that an interference fit can be achieved between the limiting hole and the limiting column 111, which is beneficial to improving the tightness of the connection between the limiting hole and the limiting column 111, and further can provide the tightness of the connection between the shrapnel 120 and the base 110.

[0043] The elastic part 123 can be arranged between the limiting part 121 and the bearing part 122. That is to say, in this embodiment, the limiting part 121 and the bearing part 122 can be connected through the elastic part 123. The elastic part 132 can undergo elastic deformation when subjected to an external force, so that the bearing part 122 can vibrate under the drive of the mover assembly 132. The embodiments of the present application do not limit the specific form of the elastic part 123. For example, the elastic part 123 can be one or more strip-shaped structures to connect the limiting part 121 and the bearing part 122 together.

[0044] The actuation assembly 130 can include a stator assembly 131 and a mover assembly 132 that are coupled to each other. Among them, the stator assembly 131 can be arranged on the base 110, and the mover assembly 132 can be arranged on the shrapnel 120. The mover assembly 132 can be coupled to the stator assembly 131 to generate vibration. Furthermore, the mover assembly 132 can drive the shrapnel 120 and the scattering part 140 arranged on the mover assembly 132 to vibrate together.

[0045] The embodiments of the present application do not limit the connection manner between the stator assembly 131 and the base 110. For example, in this embodiment, the stator assembly 131 has a through hole 1311, and the surface of the base 110 may be provided with a bump 112. The size of the bump 112 may match the size of the through hole 1311. The stator assembly 131 may be sleeved on the bump 112 of the base 110 to achieve the fixation of the stator assembly 131 and the base 110. It can be understood that, to further improve the fixation effect, bonding or snap - connection may be performed simultaneously between the stator assembly 131 and the base 110 on the basis of the above - mentioned connection, which is not limited herein.

[0046] It should be noted that, in this embodiment, the height of the bump 112 protruding from the surface of the base 110 is lower than the height of the limiting post 111 protruding from the surface of the base 110. At the same time, the height of the stator assembly 131 protruding from the surface of the base 110 is lower than the height of the limiting post 111 protruding from the surface of the base 110. This can make a gap between the elastic piece 120 and the stator assembly 131, ensuring that the elastic piece 120 has a deformation space.

[0047] Furthermore, the mover assembly 132 is detachably disposed on the surface of the elastic piece 120 away from the base. This can make the mover assembly 132 and the stator assembly 131 located on both sides of the elastic piece 120 respectively, ensuring that the elastic piece 120 can work normally.

[0048] The embodiments of the present application also do not limit the connection manner between the mover assembly 132 and the elastic piece 120. For example, in one embodiment, the mover assembly 132 may be bonded to the surface of the elastic piece 120, specifically, it may be bonded to the bearing portion 122 of the elastic piece 120. In another embodiment, the mover assembly 132 may be snap - connected to the bearing portion 122 of the elastic piece 120, etc. It can be specifically set according to the actual situation.

[0049] Please refer to Figure 4 and Figure 5 , in this embodiment, the mover assembly 132 may have a first vibration mode and a second vibration mode. The dynamic speckle dissipation device 10 provided by the embodiments of the present application can achieve two vibration modes by only setting one mover assembly 132, having the characteristic of small volume. At the same time, since only one mover assembly 132 is set, the dynamic speckle dissipation device 10 provided by the embodiments of the present application also has the characteristic of low energy consumption.

[0050] In a more specific embodiment, the stator assembly 131 may be a coil, and the mover assembly 132 may be a magnetic body. When the coil is energized, a magnetic field can be generated and coupled with the magnetic field of the magnetic body itself, so that the mover assembly 132 vibrates relative to the stator assembly 131.

[0051] Please refer toFigure 4 , the first vibration mode is the mode of vibrating along the axis of the coil, that is, the mover assembly 132 can vibrate up and down in the axial direction of the coil (as shown by the arrow direction in the figure), please refer to Figure 5 , the second vibration mode is the motion mode of swinging around the axis of the coil, that is, the mover assembly 132 can also swing around the axial direction of the coil (as shown by the arrow direction in the figure). It should be noted that the embodiments of the present application do not limit the specific vibration mode when the mover assembly 132 moves. For example, in one application scenario, the mover assembly 132 can vibrate only in the first vibration mode. In another application scenario, the mover assembly 132 can also vibrate only in the second vibration mode. In yet another application scenario, the mover assembly 132 can also vibrate in the first vibration mode and the second vibration mode simultaneously, and can be specifically set according to the actual situation.

[0052] It can be understood that both the first vibration mode and the second vibration mode have a specific vibration frequency, which is related to the material used by the mover assembly 132, the temperature environment it is in, and the specific shape and structure of the mover assembly 132, etc., and is an inherent physical property of the mover assembly 132. The present application does not limit the above specific vibration frequency and can be specifically set according to the actual situation. In this embodiment, the coil can be configured to generate a driving signal after being powered on, and the driving signal can include a first driving signal and / or a second driving signal. For the convenience of description, the following takes the driving signal can include a first driving signal and a second driving signal as an example for explanation, that is, in this embodiment, the driving signal can be decomposed into a first driving signal and a second driving signal, where the frequency of the first driving signal can be the same as the vibration frequency of the first vibration mode, and the frequency of the second driving signal can be the same as the vibration frequency of the second vibration mode. In this way, the mover assembly 132 can resonate in the vibration direction, so as to maximize the amplitude in the vibration direction, and further improve the effect of eliminating speckle.

[0053] In this embodiment, the first driving signal and / or the second driving signal can be set as a sine wave signal. Specifically, the first driving signal and the second driving signal can be generated by energizing the coil. Among them, the first driving signal I 1 satisfies: I 1 = k 1 ×sin(2π×f 1 ×t), the second driving signal I 2 satisfies: I 2 = k 2 ×sin(2π×f 2 ×t), where k 1 is the first signal amplitude, f 1 is the frequency of the first sine wave signal, k 2is the amplitude of the second signal, and f 2 is the frequency of the second sine wave signal, and t is time. It can be understood that the total driving signal I supplied by the power supply circuit to the coil is the first driving signal I 1 and the second driving signal I 2 sum.

[0054] For ease of understanding, in the following, an example is given with the signal amplitude being 1, and the vibration frequencies of the first vibration mode and the second vibration mode being 340 Hz and 400 Hz respectively. Please also refer to Figure 6 and Figure 7 . It should be noted that the abscissa in the figure represents time, and the ordinate represents the signal amplitude. Since the vibration frequency of the second vibration mode is greater than that of the first vibration mode, it can be seen from the figure that the frequency of the second driving signal is also greater than that of the first driving signal. Please also refer to Figure 8 shown in Figure 8 is a schematic diagram of the total driving signal supplied by the power supply circuit to the coil. Since the total driving signal supplied by the power supply circuit to the coil is the superimposed value of the first driving signal and the second driving signal, in Figure 8 , the amplitude of the total driving signal emitted by the coil is 2.

[0055] It should be noted that the vibration frequencies of the first vibration mode and the second vibration mode should be between 100 Hz and 1000 Hz. If the vibration frequency is too small, the speckle elimination effect of the dynamic speckle device 10 will be reduced. If the vibration frequency is too large, the dynamic speckle device 10 will be damaged. The embodiments of the present application do not limit the vibration frequencies of the first vibration mode and the second vibration mode. For example, they can be 100 Hz, 300 Hz, 340 Hz, 400 Hz, 550 Hz, 700 Hz, 930 Hz or 1000 Hz, etc., and can be specifically set according to actual situations.

[0056] In addition, in some other embodiments, the first driving signal and / or the second driving signal can also be a square wave signal with a specific frequency and duty cycle. Since the square wave signal is a non-sinusoidal curve waveform, its voltage or current alternates between high and low levels, and this change is instantaneous without a smooth transition. Therefore, the waveform of the square wave signal is stable and does not have harmonic components like a sine wave, so it is easier to analyze and apply.

[0057] It should be noted that the duty cycle of the square wave signal determines the proportion of time occupied by the high level in the square wave signal, thus affecting the power consumption of the mover assembly 132. For example, the duty cycle of the square wave signal can be set between 60% - 80%, so that the dynamic speckle device 10 can fully eliminate speckles and at the same time is beneficial to reducing the overall energy consumption of the dynamic speckle device 10.

[0058] Please refer to again Figure 3 Figure 3 , the scattering member 140 may include a support base 141 and a scattering sheet 142. The support base 141 may be disposed on the mover assembly 132, and the scattering sheet 142 may be disposed on the support base 141. The mover assembly 132 may drive the support base 141 to vibrate, and thus may drive the scattering sheet 142 to vibrate. During the vibration process, the scattering sheet 142 may change the phase and amplitude distribution of light during propagation, thereby destroying the stability of the speckle pattern, making it blurred or disappear, so as to achieve the effect of eliminating speckles. In addition, the scattering sheet 142 may also utilize its scattering effect to reduce the coherence of the laser light source 1, thereby suppressing the formation of speckles.

[0059] Specifically, when the scattering sheet 142 vibrates, it moves in space at a certain frequency and amplitude, which causes the phase and amplitude of the light to be modulated when passing through the scattering sheet 142. Since the vibration is continuous and has a certain pattern, after the light passes through the vibrating scattering sheet 142, the distribution of its phase and amplitude becomes more complex and random, thereby destroying the original speckle pattern.

[0060] Furthermore, in this embodiment, the scattering sheet 142 may be a diffuser sheet, and the scattering sheet 142 may be used to change the propagation direction of light, so as to further destroy the original speckle pattern to achieve the effect of eliminating speckles.

[0061] It should be noted that the embodiments of the present application do not limit the specific connection manner between the support base 141 and the mover assembly 132. For example, the support base 141 may be directly bonded to the mover assembly 132, or the mover assembly 132 may be snap-fitted to the mover assembly 132, etc., and may be specifically set according to the actual situation.

[0062] In addition, the embodiments of the present application do not limit the specific connection manner between the support base 141 and the scattering sheet 142. For example, in this embodiment, the support base 141 may be provided with a mounting groove 1411, and the mounting groove 1411 may be used to accommodate the scattering sheet 142. The scattering sheet 142 is detachably disposed in the mounting groove 1411. When the scattering sheet 142 or the support base 141 is damaged, only the damaged part can be replaced, which is beneficial to reducing the user's usage cost.

[0063] The dynamic speckle elimination device 10 provided by the embodiment of the present application sets an elastic piece 120 on the base 110 that can deform relative to the base 110, and sets the stator assembly 131 in the actuator assembly 130 on the base 110 and the rotor assembly 132 on the elastic piece 120. The rotor assembly 132 has a first vibration mode and a second vibration mode, and the rotor assembly 132 and the stator assembly 131 can be coupled to drive the scatterer 140 disposed on the rotor assembly 132 to vibrate, thereby achieving the effect of eliminating speckles. Specifically, in the embodiment of the present application, since the rotor assembly 132 has a total of two vibration modes, namely the first vibration mode and the second vibration mode, the scatterer 140 can be driven to vibrate in the vibration direction of the first vibration mode and / or in the vibration direction of the second vibration mode, thereby achieving the effect of eliminating speckles. Since only one rotor assembly 132 needs to be set, the dynamic speckle elimination device 10 provided by the embodiment of the present application has the characteristics of small volume and simple structure, and solves the problem of large volume of the dynamic speckle elimination device 10 in the prior art. Applying the above dynamic speckle elimination device 10 to the light source 1 can also reduce the volume of the light source 1.

[0064] In the present utility model, unless otherwise clearly defined or limited, terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, or a transmission connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as specific or special structures. The description of "some embodiments" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present utility model and the features of different embodiments or examples.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A dynamic speckle removal device, characterized in that: include: Base; A spring sheet, the spring sheet is disposed on the base and can be deformed relative to the base; An actuating assembly, the actuating assembly comprising a stator assembly and a mover assembly coupled to each other, the stator assembly being arranged on the base, the mover assembly being arranged on the spring, and the mover assembly having a first vibration mode and a second vibration mode; as well as A scattering member, wherein the scattering member is arranged on the mover assembly.

2. The dynamic speckle reduction device according to claim 1, characterized in that: The stator component is a coil, and the mover component is a magnetic body.

3. The dynamic speckle reduction device according to claim 2, characterized in that: The first vibration mode is a mode of vibration along the axial direction of the coil, and the second vibration mode is a motion mode of swinging around the axial direction of the coil.

4. The dynamic speckle reduction device according to claim 3, characterized in that: The coil is configured to generate a drive signal after being energized, and the drive signal includes a first drive signal and / or a second drive signal, the frequency of the first drive signal is the same as the vibration frequency of the first vibration mode, and the frequency of the second drive signal is the same as the vibration frequency of the second vibration mode.

5. The dynamic speckle reduction device according to claim 4, characterized in that: The first drive signal I1 satisfies: I1=k1×sin(2π×f1×t), and the second drive signal I2 satisfies: I2=k2×sin(2π×f2×t), wherein k1 is the first signal amplitude, f1 is the frequency of the first sinusoidal wave signal, k2 is the second signal amplitude, f2 is the frequency of the second sinusoidal wave signal, and t is time.

6. The dynamic speckle reduction device according to claim 1, characterized in that: The base is convexly provided with at least two limiting columns, the two limiting columns are arranged at intervals, and the elastic sheet is detachably arranged on the limiting columns.

7. The dynamic speckle reduction device according to claim 6, characterized in that: The height of the limiting column protruding from the base is greater than the height of the stator assembly protruding from the base, and the movable assembly is detachably arranged on the surface of the spring sheet away from the base.

8. The dynamic speckle reduction device according to claim 1, characterized in that: The scattering member includes: a support seat and a scattering sheet, the support seat is arranged on the mover assembly, and the scattering sheet is arranged on the support seat.

9. The dynamic speckle reduction device according to claim 8, characterized in that: The support seat is provided with a mounting groove, and the scattering sheet is detachably arranged in the mounting groove.

10. A light source, characterized in that: It comprises a light-emitting component and at least one dynamic speckle elimination device as claimed in any one of claims 1 to 9, wherein the light-emitting component is used to emit light, and the scattering element is located on the light path of the light source.

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