Laser projection device and camera

Abstract

The invention provides a laser projection device and a camera, and relates to the technical field of machine vision. The laser projection device provided by the invention comprises a laser emitting assembly and a light filtering assembly, the light filtering assembly is located on the light emitting side of the laser emitting assembly and comprises a light transmitting part and a floodlight part, and one of the laser emitting assembly and the light filtering assembly is movably arranged relative to the other one, so that the laser emitting assembly projects speckle structured light through the light transmitting part or projects floodlight through the floodlight part; different projection light effects are achieved through a single light source, the size and weight of the laser projection device are reduced, and the production and manufacturing cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of machine vision technology, and in particular to a laser projection device and a camera. Background Art

[0002] With the development of science and technology, image data has become important data information. Image acquisition devices such as cameras and industrial cameras used to collect and analyze image data are also widely used in different fields such as industrial logistics, autonomous driving, intelligent robots, depth measurement, etc.

[0003] In related technologies, depth cameras can obtain 3D images with depth information, contain more data information, and can better identify and measure targets. They are widely used in image information recognition, 3D modeling, VR and other scenarios. The transmissor of a depth camera can usually emit structured light and floodlight respectively. It is equipped with a laser light source and a floodlight light source. The two light sources are equipped with separate driving circuits to meet the fill light requirements in different scenarios.

[0004] However, the current depth camera's light projector needs to be equipped with two light source systems, which are complex in structure and high in cost. Summary of the invention

[0005] The present application provides a laser projection device and a camera to solve the technical problem that the light projector of the current depth camera needs to be equipped with two sets of light source systems, which has a complex structure and high cost.

[0006] In a first aspect, the present application provides a laser projection device including a laser emitting component and a filter component; the filter component is located on the light emitting side of the laser emitting component.

[0007] The filter assembly includes a light-transmitting component and a floodlight component, and one of the laser emitting assembly and the filter assembly is movably arranged relative to the other, so that the laser emitting assembly projects speckle structured light through the light-transmitting component, or projects floodlight through the floodlight component.

[0008] The laser projection device provided in the present application is configured with a filter component consisting of two parts, a light-transmitting part and a floodlight part, and the position is switched by moving one of the laser emitting component and the filter component. In different scene requirements, the light of the laser emitting component can pass through the light-transmitting part and the floodlight part respectively to achieve the effects of emitting speckle structured light and floodlight, thereby reducing the volume and weight of the laser projection device and reducing the production cost.

[0009] As an optional implementation, the laser emission assembly may include a laser and an optical element, wherein the optical element is located on the light emitting side of the laser; and the filter assembly is located on a side of the optical element away from the laser and is spaced apart from the optical element.

[0010] With this arrangement, the light emitted by the laser can be adjusted to improve the accuracy and stability of the light.

[0011] As an optional implementation, the laser may be a vertical cavity surface emitting laser; and /

[0012] Alternatively, the optical element may be a diffractive optical lens.

[0013] Such an arrangement can reduce the volume of the entire laser emitting assembly, improve the beam quality, and increase the modulation bandwidth.

[0014] As an optional embodiment, the laser projection device also includes a driving component, the output end of which is connected to the laser emitting component or the filtering component, and drives one of the laser emitting component and the filtering component to move relative to the other.

[0015] As an optional embodiment, the light-transmitting member includes a fully transparent frame, and the floodlight member is movably arranged on the fully transparent frame; the driving assembly includes a driving unit, the output end of the driving unit is connected to the floodlight member, and drives the floodlight member to move along the length direction of the fully transparent frame so that the light-transmitting member is opposite to the laser emitting assembly, or the floodlight member is blocked between the light-transmitting member and the laser emitting assembly.

[0016] As an optional embodiment, the driving assembly includes a driving unit and a transmission member; the filtering assembly also includes a frame, and the transmission member is connected to the frame; the light-transmitting member and the floodlight member are arranged on the frame; the driving unit is configured to drive the transmission member to move and drive the frame to move, so that either the light-transmitting member or the floodlight member is opposite to the laser emitting assembly.

[0017] As an optional embodiment, the laser projection device may further include a housing, in which the laser emitting component, the filter component and the driving component are all arranged; the housing is provided with a guide groove, the frame is slidably connected to the guide groove, and the driving unit is configured to drive the filter component to move along the guide groove through a transmission member.

[0018] With this arrangement, the switching between structured light and floodlight can be achieved by moving the filter component, making it more convenient to change the light type according to different scenes.

[0019] As an optional implementation, the driving unit may include a linear motor, a first end of the transmission member is connected to an output end of the linear motor, and a second end of the transmission member is connected to the frame.

[0020] With such an arrangement, the linear motor can be used to drive the transmission member to move in a linear direction, thereby driving the filter assembly to move and switch quickly.

[0021] As an optional embodiment, the transmission member may include a screw and a screw nut; the screw is located on the side of the frame, the driving unit is configured to drive the screw to rotate, and the axial direction of the screw is parallel to the guide groove; the screw nut is slidingly connected to the housing, and the screw nut is connected to the screw; the frame is connected to the screw nut.

[0022] Such an arrangement can fully utilize the space on the side of the filter assembly, thereby improving the space utilization rate in the housing.

[0023] As an optional embodiment, the transmission member includes a rocker arm, the driving unit is configured to drive the rocker arm to rotate, the frame has a first sliding groove, the end of the rocker arm away from the driving unit has a sliding portion, and the sliding portion is slidably arranged in the first sliding groove so that the filter assembly is driven to move when the rocker arm rotates.

[0024] With such arrangement, the filter assembly can be driven to move by the rotating motor, and the rocker rod cooperates with the filter assembly to improve the smoothness of the movement of the filter assembly.

[0025] As an optional embodiment, the laser projection device may further include a housing, in which the laser emitting component, the filter component and the drive component are all disposed; the frame is rotatably connected to the housing, and the drive unit is configured to drive the transmission member to rotate so that the transmission member drives the filter component to rotate relative to the housing.

[0026] With this arrangement, the switching between structured light and floodlight can be achieved by rotating the filter component, making it more convenient to change the light type according to different scenes.

[0027] As an optional implementation, the first end of the transmission member is connected to the output end of the driving unit, the frame has a second sliding groove, the second sliding groove is located between the light-transmitting member and the floodlight member, and the second end of the transmission member is slidably disposed in the second sliding groove.

[0028] With such arrangement, when the transmission member rotates, the filter assembly is driven to rotate, and when the filter assembly switches positions, the rotation range of the filter assembly can be reduced, thereby reducing space occupation.

[0029] In a second aspect, the present application provides a camera, which includes an image acquisition device and the laser projection device in the above technical solution, and the image acquisition device is configured to receive reflected light projected by the laser projection device onto the surface of an object.

[0030] The present application provides a laser projection device and a camera. The laser projection device includes a laser emitting component and a filter component. The filter component is located on the light-emitting side of the laser emitting component. The laser emitting component is configured to emit light to the filter component. One of the laser emitting component and the filter component is movably arranged relative to the other so that the laser emitting component projects speckle structured light through a light-transmitting component, or projects flood light through a floodlight component, thereby reducing the volume and weight of the laser projection device and reducing the production cost.

[0031] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the laser projection device and camera provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of a laser projection device provided in an embodiment of the present application;

[0034] Figure 2 Schematic diagram of a driving component driving a filter component in a laser projection device provided in an embodiment of the present application Figure 1 ;

[0035] Figure 3 Schematic diagram of a driving component driving a filter component in a laser projection device provided in an embodiment of the present application Figure 2 ;

[0036] Figure 4 Schematic diagram of a driving component driving a filter component in a laser projection device provided in an embodiment of the present application Figure 3 ;

[0037] Figure 5 Schematic diagram of a driving component driving a filter component in a laser projection device provided in an embodiment of the present application Figure 4 ;

[0038] Figure 6 A schematic diagram of a filter component in a laser projection device provided in an embodiment of the present application in one state;

[0039] Figure 7A schematic diagram of a filter component in a laser projection device provided by an embodiment of the present application in another state;

[0040] Figure 8 A schematic diagram of a driving component in a laser projection device provided in an embodiment of the present application directly driving a floodlight;

[0041] Fig. 9 A schematic diagram of an application scenario of a camera provided in an embodiment of the present application.

[0042] Description of reference numerals:

[0043] 10-Laser projection device;

[0044] 100-laser emission assembly; 110-laser; 120-optical element;

[0045] 200-filter assembly; 210-frame; 211-first sliding slot; 212-second sliding slot; 220-light-transmitting member; 230-flooding member;

[0046] 300-driving assembly; 310-driving unit; 320-transmission member; 321-lead screw; 322-lead screw nut; 323-swing rod;

[0047] 400-housing; 401-guide groove;

[0048] 20- Image acquisition device;

[0049] 30- Objects. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0052] Secondly, it should be noted that in the description of the present application, terms such as "up", "down", "left", "right", "front", "back", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0053] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0055] Depth cameras can obtain 3D images with depth information, which contain more data information and can better identify and measure targets. They are widely used in image information recognition, 3D modeling, VR and other scenarios. The depth camera's transmissor is usually equipped with two independent light source systems, which can emit structured light and floodlight respectively. The two independent light source systems correspond to laser light sources and floodlight sources respectively. The two light sources are equipped with separate driving circuits to meet the fill light requirements in different scenarios. In actual applications, they can switch between the two light emission states.

[0056] However, the current depth camera's light projector needs to be equipped with two light source systems, which not only makes the internal structure of the light projector complex, occupies a large space, and increases the weight of the equipment, but also leads to a higher overall cost of the light projector.

[0057] In response to the above problems, the embodiments of the present application provide a laser projection device and a camera. Through the structural design of the filter inside the laser projection device, the emitted laser can produce different effects of structured light and floodlight respectively when passing through different areas of the filter. At the same time, the driving structure is designed in conjunction with the filter, so that the laser projection device can switch between the two lighting effects, thereby meeting different application scenarios while reducing the product volume and reducing the product cost.

[0058] To facilitate understanding, the application scenarios applicable to the laser projection device and camera provided in the embodiments of the present application are first described below.

[0059] The laser projection device provided in the embodiment of the present application is applied in a camera, which can be applied to object measurement or 3D modeling in indoor places such as laboratories, or can be applied to automation equipment in manufacturing factories, or can be applied to handling robots or automation equipment in logistics warehousing. In addition, it can be applied to transportation tools such as autonomous driving vehicles to identify the surrounding environment or objects, and can be applied to various other intelligent devices. For example, the camera can be a depth camera, etc., which is not specifically limited in the embodiment of the present application.

[0060] Figure 1 A schematic diagram of the structure of a laser projection device provided in an embodiment of the present application; Figure 2 Schematic diagram of a driving component driving a filter in a laser projection device provided in an embodiment of the present application Figure 1 .

[0061] Please refer to Figure 1 and Figure 2 The present application provides a laser projection device 10 including a laser emitting component 100 and a filter component 200. The filter component 200 is located at the light emitting side of the laser emitting component 100, and the laser emitting component 100 is configured to emit light to the filter component 200.

[0062] The filter assembly 200 includes a light-transmitting element 220 and a floodlight element 230. One of the laser emitting assembly 100 and the filter assembly 200 is movably arranged relative to the other, so that the laser emitting assembly 100 projects speckle structured light through the light-transmitting element 220 or projects floodlight through the floodlight element 230.

[0063] In some embodiments, the laser projection device 10 further includes a driving component 300, an output end of which is connected to the laser emitting component 100 or the filtering component 200, and drives one of the laser emitting component 100 and the filtering component 200 to move relative to the other.

[0064] Illustratively, the driving component 300 can drive the laser emitting component 100 to move, thereby adjusting the position of the laser emitting component 100 relative to the filtering component 200, so that the laser emitting component 100 can project speckle structured light from the light-transmitting element 220, or project flood light through the floodlight element 230.

[0065] Illustratively, the driving component 300 can drive the filter component 200 to move or rotate so that the floodlight 230 is directly opposite the light-emitting side of the laser emitting component 100 to project floodlight, or the floodlight 230 is deviated from the light-emitting side of the laser emitting component 100, and the laser emitting component 100 directly projects the speckle structured light through the transparent component 220.

[0066] It should be noted that when the driving component 300 drives the filter component 200 to move, the driving component 300 can drive the entire structure of the filter component 200 to move, or only drive the floodlight 230 on the filter component 200 to move, which will be described in detail below through different examples.

[0067] Please refer to Figure 8 In a possible implementation, the light-transmitting member 220 includes a fully transparent frame, and the floodlight member 230 is movably disposed on the fully transparent frame; the driving assembly 300 includes a driving unit 310, and the output end of the driving unit 310 is connected to the floodlight member 230, and drives the floodlight member 230 to move along the length direction of the fully transparent frame, so that the light-transmitting member 220 is opposite to the laser emitting assembly 100, or the floodlight member 230 is blocked between the light-transmitting member 220 and the laser emitting assembly 100.

[0068] It can be understood that when the driving unit 310 drives the floodlight 230 to be blocked between the light-transmitting member 220 and the laser emitting assembly 100, the laser emitting assembly 100 projects the floodlight through the floodlight 230; and when the floodlight 230 moves to the side of the laser emitting assembly 100 and the light-transmitting member 220 is opposite to the laser emitting assembly 100, the laser emitting assembly 100 projects the speckle structured light through the light-transmitting member 220.

[0069] Please refer to Figure 1 and Figure 2 In another possible implementation, the driving assembly 300 includes a driving unit 310 and a transmission member 320; the filter assembly 200 also includes a frame 210, and the transmission member 320 is connected to the frame 210; the light-transmitting member 220 and the floodlight member 230 are arranged on the frame 210; the driving unit 310 is configured to drive the transmission member 320 to move, and drive the frame 210 to move, so that any one of the light-transmitting member 220 and the floodlight member 230 is opposite to the laser emitting assembly 100.

[0070] It can be understood that the light-transmitting element 220 and the floodlight element 230 on the filter assembly 200 can form two independent areas. When the light emitted by the laser emitting assembly 100 passes through the light-transmitting element 220, the light is speckle structured light; when the light emitted by the laser emitting assembly 100 passes through the floodlight element 230, the light is floodlight.

[0071] Exemplarily, the light-transmitting element 220 may be a fully transparent frame, and the light passing through the light-transmitting element 220 will not change. When projected onto the surface of an object, it may present speckle feature points, which may be applied to scenes where the camera needs to produce a depth map. The floodlight element 230 may be made of a frosted material such as frosted glass, and the light passing through the floodlight element 230 may produce a floodlight effect, which may be applied to scenes where the edge contour of an object needs to be identified or the object needs to be calibrated.

[0072] It should be noted that in the laser projection device 10 provided in the embodiment of the present application, the two parts of the light-transmitting component 220 and the floodlight component 230 provided on the filter component 200 are independent of each other. In different application scenarios, the light emitted by the laser emission component 100 only passes through one of them. The position of the filter component 200 can be switched by the driving component 300, so that under the requirements of different scenarios, the light of the laser emission component 100 can pass through the light-transmitting component 220 and the floodlight component 230 respectively to achieve the effects of emitting structured light and floodlight. Compared with the prior art, only one light source system is needed to achieve a variety of light-emitting effects, which reduces the volume and weight of the laser projection device 10 and reduces the production cost.

[0073] Please continue to refer to Figure 1 and Figure 2 In some embodiments, the laser emission assembly 100 may include a laser 110 and an optical element 120, wherein the optical element 120 is located at the light emitting side of the laser 110. The filter assembly 200 is located at a side of the optical element 120 away from the laser 110 and has a distance from the optical element 120, so that the light emitted by the laser 110 can be adjusted to improve the light accuracy and stability.

[0074] It is understood that the laser 110 is used to emit laser light, and the laser light emitted by the laser 110 first passes through the optical element 120 and then passes through the optical filter assembly 200. The optical element 120 can adjust the light intensity distribution of the laser light emitted by the laser 110.

[0075] For example, the laser 110 may be a vertical-cavity surface-emitting laser (VCSEL). The laser may be emitted perpendicular to the top surface of the laser 110, and the emitted light beam is circular with a small divergence angle and high coupling efficiency with the optical element 120.

[0076] For example, the optical element 120 may be a diffractive optical element (DOE). A diffractive optical lens may have a high diffraction efficiency and may precisely control light intensity distribution.

[0077] In addition, the use of a diffractive optical lens in conjunction with the vertical cavity surface emitting laser 110 can reduce the volume of the entire laser emitting assembly 100, improve the beam quality, and increase the modulation bandwidth.

[0078] It should be noted that the laser projection device 10 may also include a driving circuit, and the driving circuit is used to drive the laser 110 to emit light.

[0079] Exemplarily, the shapes of the light-transmitting member 220 and the floodlight member 230 can be circular, square, oval, etc. The embodiment of the present application does not limit the specific shapes and sizes of the light-transmitting member 220 and the floodlight member 230.

[0080] Exemplarily, the light-transmitting member 220 and the floodlight member 230 may be connected to each other, or the light-transmitting member 220 and the floodlight member 230 may be spaced apart on the frame 210 , which is not limited in the embodiment of the present application.

[0081] In the embodiment of the present application, the type of light emitted by the laser emitting component 100 remains unchanged, and the light is changed by switching the position of the light-transmitting member by the driving component 300. The driving component 300 can adjust the position of the filter component 200 by driving the filter component 200 to move, or the driving component 300 can adjust the position of the filter component 200 by driving the filter component 200 to rotate, which will be described below through different examples.

[0082] Figure 3 Schematic diagram of a driving component driving a filter in a laser projection device provided in an embodiment of the present application Figure 2 ; Figure 4 Schematic diagram of a driving component driving a filter in a laser projection device provided in an embodiment of the present application Figure 3 .

[0083] Please refer to Figures 1 to 4 In a possible implementation, the laser projection device 10 may further include a housing 400 , in which the laser emission component 100 , the filter component 200 and the drive component 300 are all disposed.

[0084] Among them, the shell 400 is provided with a guide groove 401, the frame 210 is slidably connected to the guide groove 401, and the driving unit 310 is configured to drive the filter component 200 to move along the guide groove 401 through the transmission member 320, so that the switching between structured light and floodlight can be achieved by moving the filter component 200, and the light type can be changed according to different scenes more conveniently.

[0085] It is understandable that the guide groove 401 can guide the movement of the filter assembly 200 to ensure the stability and smoothness of the switching between different positions of the filter assembly 200. The moving plane of the filter assembly 200 can be perpendicular to the light emitting direction of the laser emitting assembly 100.

[0086] Please refer to Figure 2 In some embodiments, the driving unit 310 may include a linear motor, a first end of the transmission member 320 is connected to the output end of the linear motor, and a second end of the transmission member 320 is connected to the frame 210. The transmission member 320 can be driven by the linear motor to move in a linear direction, thereby driving the filter assembly 200 to move and switch quickly.

[0087] Exemplarily, the linear motor can be arranged at the end of the filter assembly 200, and the transmission member 320 is connected between the frame 210 of the filter assembly 200 and the output end of the linear motor. The two ends of the transmission member 320 can be fixedly connected to the frame 210 and the output end of the linear motor respectively by fasteners such as screws and buckles.

[0088] Please refer to Figure 3 In some embodiments, the transmission member 320 may include a lead screw 321 and a lead screw nut 322. The lead screw 321 is located on the side of the frame 210, and the driving unit 310 is configured to drive the lead screw 321 to rotate, and the axial direction of the lead screw 321 is parallel to the guide groove 401. The lead screw nut 322 is slidably connected to the housing 400, and the lead screw nut 322 is connected to the lead screw 321. The frame 210 is connected to the lead screw nut 322.

[0089] It is understandable that the driving unit 310 can be a motor, and the motor drives the lead screw 321 to rotate. When the lead screw 321 rotates, the lead screw nut 322 sleeved on the lead screw 321 can move along the axial direction of the lead screw 321, thereby driving the filter assembly 200 to move. The lead screw 321 and the lead screw nut 322 arranged on the side of the filter assembly 200 can avoid the light exit area of ​​the filter assembly 200, and can make full use of the space on the side of the filter assembly 200, thereby improving the space utilization rate in the housing 400.

[0090] Exemplarily, bearings and bearing seats can be respectively provided at both ends of the lead screw 321 , and the bearing seats can be fixedly connected to the housing 400 , thereby providing good support for the lead screw 321 and improving the installation reliability of the lead screw 321 in the housing 400 .

[0091] Please refer to Figure 4 In some embodiments, the transmission member 320 may include a rocker bar 323, the driving unit 310 is configured to drive the rocker bar 323 to rotate, the frame 210 has a first sliding groove 211, and the end of the rocker bar 323 away from the driving unit 310 has a sliding portion, which is slidably disposed in the first sliding groove 211, so that the filter assembly 200 is driven to move when the rocker bar 323 rotates.

[0092] It is understandable that when the swing rod 323 rotates, the sliding portion of the swing rod 323 abuts against the side wall of the first sliding slot 211 on the frame 210, thereby pushing the filter assembly 200 to move. The cooperation between the swing rod 323 and the filter assembly 200 can improve the smoothness of the movement of the filter assembly 200.

[0093] Exemplarily, the first sliding groove 211 may be disposed at a side edge of the frame 210 , and an extending direction of the first sliding groove 211 may be perpendicular to a moving direction of the filter assembly 200 .

[0094] Figure 5 Schematic diagram of a driving component driving a filter in a laser projection device provided in an embodiment of the present application Figure 4 ; Figure 6 A schematic diagram of a filter in a laser projection device provided in an embodiment of the present application in one state; Figure 7 A schematic diagram of a filter in another state in a laser projection device provided in an embodiment of the present application.

[0095] Please refer to Figures 5 to 7 In a possible implementation, the laser projection device 10 may further include a housing 400 , in which the laser emission component 100 , the filter component 200 and the drive component 300 are all disposed.

[0096] Among them, the frame 210 is rotatably connected to the shell 400, and the driving unit 310 is configured to drive the transmission member 320 to rotate, so that the transmission member 320 drives the filter component 200 to rotate relative to the shell 400, so that the switching between structured light and floodlight can be achieved by rotating the filter component 200, and the light type can be changed according to different scenes more conveniently.

[0097] It is understandable that the laser emitting assembly 100 is fixed relative to the housing 400. When the filter element rotates relative to the housing 400, the position of the filter element relative to the laser emitting assembly 100 can be adjusted so that the laser emitting assembly 100 is opposite to the light-transmitting element 220 or the floodlight element 230.

[0098] For example, the frame 210 may be a plate-like structure, and two openings are provided on the frame 210, and the two openings are respectively fixedly installed with the light-transmitting member 220 and the floodlight member 230. A rotating shaft hole is provided on the edge of the frame 210, and a rotating shaft may be provided on the housing 400. The frame 210 is sleeved on the rotating shaft of the housing 400 through the rotating shaft hole, so that the filter element can rotate smoothly relative to the housing 400.

[0099] In some embodiments, the first end of the transmission member 320 is connected to the output end of the driving unit 310, the frame 210 has a second sliding groove 212, the second sliding groove 212 is located between the light-transmitting member 220 and the floodlight member 230, and the second end of the transmission member 320 is slidably disposed in the second sliding groove 212. In this way, when the transmission member 320 rotates, the filter assembly 200 is driven to rotate, and when the filter assembly 200 switches positions, the rotation range of the filter assembly 200 can be reduced, thereby reducing space occupation.

[0100] It is understandable that the driving unit 310 can be a motor. When the driving unit 310 drives the transmission member 320 to rotate, the second end of the transmission member 320 moves in the second sliding groove 212 and drives the filter assembly 200 to rotate relative to the housing 400 by abutting against the side wall of the second sliding groove 212.

[0101] Exemplarily, the central axis of the light-transmitting element 220 and the central axis of the floodlight element 230 may pass through the rotation center of the filter element at the same time.

[0102] Fig. 9 A schematic diagram of an application scenario of a camera provided in an embodiment of the present application.

[0103] Please refer to Fig. 9 The embodiment of the present application provides a camera, which includes an image acquisition device 20 and the laser projection device 10 in the above technical solution. The image acquisition device 20 is configured to receive the reflected light projected by the laser projection device 10 to the surface of the object 30. The camera can be color depth (RGB-

[0104] D) Image acquisition and analysis equipment.

[0105] When the laser projection device 10 emits structured light, the structured light forms a projection pattern on the object 30, and the image acquisition device 20 can collect the illumination pattern on the surface of the object 30 through the reflection of light, thereby forming a depth image. When the laser projection device 10 emits flood light, the image acquisition device 20 receives the reflected light on the surface of the object 30 and can calculate the distance between the surface position of the object 30 and the image acquisition device 20 through the time of flight (TOF), thereby achieving distance measurement, or object contour recognition and calibration functions.

[0106] Exemplarily, there may be two image acquisition devices 20, and the two image acquisition devices 20 may respectively receive the reflected light projected by the laser projection device 10 onto the surface of the object 30 to perform active measurement. Alternatively, the two image acquisition devices 20 may respectively passively acquire image information and implement measurement or recognition of the object 30 through parallax. The specific number of image acquisition devices 20 is not limited in the embodiment of the present application.

[0107] An embodiment of the present application provides a laser projection device and a camera, wherein the laser projection device includes a laser emitting assembly and a filter; the filter is located on the light emitting side of the laser emitting assembly, the laser emitting assembly is configured to emit light toward the filter, the filter includes a light-transmitting component and a floodlight component, and one of the laser emitting assembly and the light-filter assembly is movably arranged relative to the other, so that the laser emitting assembly projects speckle structured light through the light-transmitting component, or projects floodlight through the floodlight component, thereby reducing the volume and weight of the laser projection device and reducing the production cost.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A laser projection device (10), characterized in that: The laser projection device (10) comprises a laser emission component (100) and a filter component (200); the filter component (200) is located on the light output side of the laser emission component (100); The filter assembly (200) comprises a light-transmitting component (220) and a floodlight component (230); one of the laser emission assembly (100) and the filter assembly (200) is movably arranged relative to the other, so that the laser emission assembly (100) projects speckle structured light through the light-transmitting component (220), or projects floodlight through the floodlight component (230).

2. The laser projection device (10) according to claim 1, characterized in that: The laser emission component (100) comprises a laser (110) and an optical element (120), wherein the optical element (120) is located on the light emitting side of the laser (110); the filter component (200) is located on a side of the optical element (120) facing away from the laser (110) and is spaced apart from the optical element (120).

3. The laser projection device (10) according to claim 2, characterized in that: The laser (110) is a vertical cavity surface emitting laser (110); and / or the optical element (120) is a diffractive optical lens.

4. The laser projection device (10) according to claim 1, characterized in that: The laser projection device (10) further comprises a driving component (300), wherein an output end of the driving component (300) is connected to the laser emitting component (100) or the optical filter component (200), and drives one of the laser emitting component (100) and the optical filter component (200) to move relative to the other.

5. The laser projection device (10) according to claim 4, characterized in that: The light-transmitting member (220) comprises a fully transparent frame, and the floodlight member (230) is movably arranged on the fully transparent frame; the driving assembly (300) comprises a driving unit (310), the output end of the driving unit (310) is connected to the floodlight member (230), and drives the floodlight member (230) to move along the length direction of the fully transparent frame, so that the light-transmitting member (220) is opposite to the laser emitting assembly (100), or the floodlight member (230) is blocked between the light-transmitting member (220) and the laser emitting assembly (100).

6. The laser projection device (10) according to claim 4, characterized in that: The driving assembly (300) includes a driving unit (310) and a transmission member (320); the filter assembly (200) further includes a frame (210), and the transmission member (320) is connected to the frame (210); the light-transmitting member (220) and the floodlight member (230) are arranged on the frame (210); the driving unit (310) is configured to drive the transmission member (320) to move, and drive the frame (210) to move, so that any one of the light-transmitting member (220) and the floodlight member (230) is opposite to the laser emitting assembly (100).

7. The laser projection device (10) according to claim 6, characterized in that: The laser projection device (10) further comprises a housing (400), wherein the laser emission component (100), the filter component (200) and the drive component (300) are all arranged in the housing (400); the housing (400) is provided with a guide groove (401), the frame (210) is slidably connected to the guide groove (401), and the drive unit (310) is configured to drive the filter component (200) to move along the guide groove (401) via the transmission member (320).

8. The laser projection device (10) according to claim 7, characterized in that: The driving unit (310) comprises a linear motor, a first end of the transmission member (320) is connected to an output end of the linear motor, and a second end of the transmission member (320) is connected to the frame (210).

9. The laser projection device (10) according to claim 7, characterized in that: The transmission member (320) comprises a lead screw (321) and a lead screw nut (322); the lead screw (321) is located on the side of the frame (210), and the driving unit (310) is configured to drive the lead screw (321) to rotate, and the axial direction of the lead screw (321) is parallel to the guide groove (401); the lead screw nut (322) is slidably connected to the housing (400), and the lead screw nut (322) is connected to the lead screw (321); the frame (210) is connected to the lead screw nut (322).

10. The laser projection device (10) according to claim 7, characterized in that: The transmission member (320) comprises a swing rod (323), the driving unit (310) is configured to drive the swing rod (323) to rotate, the frame (210) has a first sliding groove (211), and the end of the swing rod (323) away from the driving unit (310) has a sliding portion, and the sliding portion is slidably arranged in the first sliding groove (211), so that when the swing rod (323) rotates, it drives the filter assembly (200) to move.

11. The laser projection device (10) according to claim 6, characterized in that: The laser projection device (10) further comprises a housing (400), wherein the laser emission assembly (100), the filter assembly (200) and the drive assembly (300) are all arranged in the housing (400); the frame (210) is rotatably connected to the housing (400), and the drive unit (310) is configured to drive the transmission member (320) to rotate, so that the transmission member (320) drives the filter assembly (200) to rotate relative to the housing (400).

12. The laser projection device (10) according to claim 11, characterized in that The first end of the transmission member (320) is connected to the output end of the driving unit (310); the frame (210) has a second sliding groove (212); the second sliding groove (212) is located between the light-transmitting member (220) and the floodlight member (230); and the second end of the transmission member (320) is slidably disposed in the second sliding groove (212).

13. A camera, characterized in that: The invention comprises an image acquisition device (20) and a laser projection device (10) according to any one of claims 1 to 12, wherein the image acquisition device (20) is configured to receive reflected light projected by the laser projection device (10) onto a surface of an object (30).

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