Laser light path apparatus and laser light path system

Abstract

A laser light path apparatus, comprising: a laser device (10); and a light splitting mechanism (20) comprising a first beam splitter (211) and second beam splitters (212). The first beam splitter is located on a propagation path of emission light emitted by the laser device; transmission light or reflected light of the first beam splitter can be emitted to the second beam splitters; transmission light of the second beam splitters located upstream can be emitted to the second beam splitters located downstream; and the beam splitters of the light splitting mechanism are parallel to one another, such that reflected light emitted by all the beam splitters is emitted in parallel in a first direction to form at least two beams of emergent light, or transmission light of the first beam splitter and reflected light of all the second beam splitters are emitted in parallel in the first direction to form at least two beams of emergent light. Further provided is a laser light path system. At least two beams of parallel emergent light can be emitted simply by providing a corresponding number of beam splitters, without using a plurality of laser light path apparatuses, thereby achieving a simple and compact structure.

Description

Laser optical path device and laser optical path system Technical Field

[0001] The present invention relates to the field of laser cutting technology, and in particular to a laser light path device and a laser light path system. Background Art

[0002] Laser cutting, as an important method for processing products, is widely used in various fields. For example, during the production of solar cells, the solar cell substrate needs to be scribed multiple times. Each time a solar cell substrate is laser-scribed, multiple laser beams need to be fired in parallel onto the solar cell substrate. To achieve this goal of firing multiple laser beams each time, a laser optical path device is required.

[0003] Traditional laser optical path devices include a laser, a beam splitter, and a reflector. The laser emits laser light, which is then split by the beam splitter. The split light is then reflected by multiple reflectors to form two laser beams. Therefore, if more than two laser beams are required, multiple laser optical path devices must be installed, resulting in a complex structure.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a laser optical path device and a laser optical path system with a simple structure to address the problem of complex structure of traditional laser optical path devices.

[0006] A laser optical path device, comprising:

[0007] Lasers;

[0008] a beam splitter mechanism comprising a first beam splitter and a second beam splitter, wherein the first beam splitter is located on a propagation path of light emitted by the laser, and light transmitted or reflected by the first beam splitter can be directed toward the second beam splitter; and when the beam splitter mechanism comprises at least two second beam splitters, light transmitted by the second beam splitter located upstream can be directed toward the second beam splitter located downstream;

[0009] The spectrometers of the spectrometer mechanism are parallel to each other, so that the reflected light emitted by all the spectrometers is emitted in parallel along the first direction to form at least two beams of output light for marking lines on the product, or the transmitted light of the first spectrometer and the reflected light of all the second spectrometers are emitted in parallel along the first direction to form at least two beams of output light for marking lines on the product.

[0010] In one embodiment, the distance between each two adjacent beam splitters is equal, so that the distance between each two adjacent beams of the output light formed by the beam splitting is equal.

[0011] In one embodiment, all the outgoing lights formed by the light splitting of the laser optical path device have equal powers.

[0012] In one embodiment, the laser optical path device further includes a half-wave plate, and each of the beam splitters is provided with a corresponding half-wave plate, and the intensity ratio of the transmitted light and the reflected light formed by the corresponding beam splitter is adjusted by the half-wave plate.

[0013] In one embodiment, the light splitting mechanism includes 6 light splitters.

[0014] In one embodiment, the laser optical path device further includes a reflector group, and the number of the reflector groups is equal to the number of the output lights and corresponds one to one;

[0015] Each group of the reflector groups includes an even number of first reflectors, which are arranged on the propagation path of the corresponding outgoing light to reflect the outgoing light. All the outgoing light is reflected by the corresponding reflector group and then emitted in parallel along the first direction.

[0016] In one embodiment, the spacing between the first reflectors located most downstream of each two adjacent reflector groups is equal, so that the spacing between the light beams formed by each two adjacent beams of the outgoing light after being reflected by the reflector groups is equal.

[0017] In one embodiment, the reflector group includes two first reflectors. In the first direction, one of the first reflectors in the reflector group is opposite to the beam splitter that emits the outgoing light, and the other first reflector in the reflector group is offset from the beam splitter that emits the outgoing light.

[0018] In one embodiment, the laser light path device further includes light blocks, and the number of the light blocks is equal to and corresponds to the number of the emitted lights;

[0019] The light blocker is located on a propagation path of the outgoing light so as to block the outgoing light from being emitted.

[0020] In one embodiment, the laser optical path device further includes at least one second reflector, which is located on the propagation path of the emitted light and is used to reflect the emitted light to the light splitting mechanism.

[0021] In one embodiment, the laser optical path device includes three second reflectors, the laser emits emission light along the first direction, the emission light is emitted to the first second reflector and is reflected thereafter and is emitted along the second direction, the emission light is then emitted to the second second reflector and is reflected thereafter and is emitted along the third direction, the emission light is then emitted to the third second reflector and is reflected thereafter and is emitted along the second direction to the beam splitting mechanism, the beam splitting mechanism splits the emission light into at least two beams of outgoing light and emits them along the first direction;

[0022] The first direction, the second direction, and the third direction intersect with each other.

[0023] In one embodiment, the laser optical path device further includes a beam expander, which is located on the propagation path of the emitted light and is used to expand the emitted light and then direct it toward the light splitting mechanism.

[0024] In one embodiment, the beam splitter is a polarization beam splitter prism.

[0025] In one embodiment, the laser optical path device further includes a power detection element, which is located on the propagation path of the transmitted light of the second beam splitter at the most downstream so as to be able to detect the power of the transmitted light.

[0026] A laser optical path system comprises at least two laser optical path devices as described above, wherein the outgoing lights formed by the light splitting of all the laser optical path devices are parallel to each other.

[0027] In one embodiment, the distance between each two adjacent beam splitters is equal, so that the distance between each two adjacent beams of the output light formed by the beam splitting is equal.

[0028] In one embodiment, the laser optical path system includes two laser optical path devices. The laser optical path system has a central axis, and the two laser optical path devices are symmetrically arranged on both sides of the central axis.

[0029] In one embodiment, the laser optical path system further includes an adjustment mechanism, the beam splitting mechanism is connected to the adjustment mechanism, and the adjustment mechanism can adjust the distance between each beam splitter.

[0030] In one embodiment, the adjustment mechanism includes a driving member and a transmission assembly, the spectrometer is connected to the driving member via the transmission assembly, and the driving member can drive the spectrometer to move via the transmission assembly to change the spacing between the spectrometers.

[0031] In one embodiment, the laser optical path device further includes a power detection element, which is located on the propagation path of the transmitted light of the second beam splitter at the most downstream side, so as to be able to detect the power of the transmitted light;

[0032] The power detection component is located at one end of the laser light path device close to the adjacent laser light path device;

[0033] The laser optical path device also includes a reflector group, the number of which is equal to and corresponds one to one to the number of the outgoing lights; each reflector group includes an even number of first reflectors, which are arranged on the propagation path of the corresponding outgoing light to reflect the outgoing light, and all the outgoing lights are reflected by the corresponding reflector group and emitted in parallel along the first direction.

[0034] The above-mentioned laser optical path device and laser optical path system can be realized by setting a corresponding number of spectrometers when at least two mutually parallel outgoing light beams need to be emitted. There is no need to copy multiple laser optical path devices when more than two laser beams need to be formed as in the prior art. The structure is simple and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a structural diagram of a laser optical path device provided in one embodiment of the present application;

[0036] FIG2 is an optical path diagram of a laser optical path system provided in one embodiment of the present application;

[0037] FIG3 is an axonometric diagram of a laser optical path system provided by another embodiment of the present application;

[0038] FIG. 4 is a top view of the laser optical path system shown in FIG. 3 .

[0039] Description of reference numerals:

[0040] 1000, laser optical path system; 100, laser optical path device; 10, laser; 20, spectrometer; 211, first spectrometer; 212, second spectrometer; 30, power detector; 40, second reflector; 50, beam expander; 60, reflector assembly; 61, first reflector; 70, light blocker. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] Referring to Figures 1 and 2, an embodiment of the present application provides a laser optical path device 100, which is used in a laser scribing device to be used for scribing on a product, thereby realizing processing of the product. Specifically, the laser optical path device 100 is used to scribing on a solar cell substrate to prepare a solar cell. In a specific embodiment, the solar cell is a perovskite cell. There are three processes in the production process of the perovskite cell that require scribing, namely the P1 process, the P2 process and the P3 process. The above-mentioned laser scribing device is capable of scribing in the P3 process. It is conceivable that in other embodiments, there is no limitation on the type of product scribed by the laser optical path device 100.

[0048] The laser optical path device 100 includes a laser 10 and a light splitting mechanism 20. The laser 10 can emit emitted light. The light splitting mechanism 20 can split the emitted light emitted by the laser 10 into at least two beams of outgoing light. The outgoing light is used to mark on the product.

[0049] The spectroscopic mechanism 20 includes a first spectroscope 211 and at least one second spectroscope 212. The spectroscope is used to split incident light into two beams, a transmitted light beam and a reflected light beam, with a certain intensity ratio. The spectroscope is typically used at an angle, which facilitates the separation of incident light into reflected light and transmitted light. The first spectroscope 211 is located along the propagation path of the emitted light emitted by the laser 10. That is, the emitted light from the laser 10 forms the incident light incident on the first spectroscope 211. The transmitted light or reflected light from the first spectroscope 211 can be directed toward the second spectroscope 212. When the transmitted light from the first spectroscope 211 is directed toward the second spectroscope 212, the transmitted light from the first spectroscope 211 forms the incident light incident on the second spectroscope 212. When the reflected light from the first spectroscope 211 is directed toward the second spectroscope 212, the reflected light from the first spectroscope 211 forms the incident light incident on the second spectroscope 212. Specifically, the spectrometer 20 includes at least two second spectrometers 212. The transmitted light of the upstream second spectrometer 212 can be directed to the downstream second spectrometer 212. At this time, the transmitted light of the upstream second spectrometer 212 forms the incident light incident on the downstream second spectrometer 212.

[0050] The beam splitters of the beam splitting mechanism 20 are parallel to each other, so that the reflected light emitted by all the beam splitters is emitted in parallel along the first direction to form at least two beams of outgoing light, or the transmitted light of the first beam splitter 211 and the reflected light of all the second beam splitters 212 are emitted in parallel along the first direction to form at least two beams of outgoing light.

[0051] In one embodiment, the transmitted light from the first beam splitter 211 is directed toward the second beam splitter 212, and the transmitted light from the second beam splitter 212 located upstream can be directed toward the second beam splitter 212 located downstream. In this case, the reflected light emitted by all the beam splitters is parallel, so that the beam splitting mechanism 20 splits the emitted light into at least two beams of outgoing light extending along the first direction and parallel to each other. In another embodiment, the reflected light from the first beam splitter 211 is directed toward the second beam splitter 212, and the transmitted light from the second beam splitter 212 located upstream can be directed toward the second beam splitter 212 located downstream. In this case, the transmitted light from the first beam splitter 211 is parallel to the reflected light from all the second beam splitters 212, so that the beam splitting mechanism 20 splits the emitted light into at least two beams of outgoing light extending along the first direction and parallel to each other.

[0052] The laser optical path device 100 provided in the embodiment of the present application can be realized by setting a corresponding number of spectrometers when at least two mutually parallel outgoing light beams need to be emitted. There is no need to copy multiple laser optical path devices 100 when more than two laser beams need to be formed as in the prior art. The structure is simple and compact.

[0053] Optionally, the light splitting mechanism 20 includes 6 beam splitters, and in this case, the laser light path device 100 can split the emitted light into 6 outgoing beams. Of course, in other embodiments, the light splitting mechanism 20 can also include 2, 3, 4, 5 or more than 6 beam splitters, which is not limited here.

[0054] The beam splitters included in the laser optical path device 100 are evenly spaced and arranged in parallel, that is, in the second direction, the spacing between each two adjacent beam splitters is equal, so that the spacing of the output light formed by the split light in the second direction is equal (the spacing between each two adjacent output light beams in the second direction is equal), so as to facilitate evenly spaced cutting or scribing. The first direction intersects the second direction, specifically, the first direction is perpendicular to the second direction.

[0055] Furthermore, the power of all the outgoing lights formed by the laser light path device 100 is equal, so as to ensure that when all the outgoing lights hit the product for marking, the depth and width of the marking are uniform, thereby ensuring the consistency of the marking. Because the sum of the intensities of the transmitted light and the reflected light divided by the spectroscope is equal to the intensity of the incident light incident thereon, by adjusting the light intensity ratio of the transmitted light and the reflected light formed by the spectroscope, the intensity of the outgoing light formed by the laser light path device 100 can be made equal, that is, the power of the outgoing light formed by the laser light path device 100 (the intensity of light is equal to the power of light per unit area) is made equal.

[0056] Specifically, the laser optical path device 100 further includes a half-wave plate. Each beam splitter is provided with a corresponding half-wave plate, and the intensity ratio of the transmitted light and the reflected light formed by the corresponding beam splitter is adjusted by the half-wave plate.

[0057] In a specific embodiment, the spectroscopic mechanism 20 includes six spectroscopes, and the reflected light emitted by all the spectroscopes forms the aforementioned output light. The intensity of light incident on the first spectroscope 211 can be set to 7, the intensities of the transmitted light and the reflected light formed by the first spectroscope 211 are 6 and 1, respectively. The intensities of the transmitted light and the reflected light formed by the first spectroscope 212 are 5 and 1, respectively. The intensities of the transmitted light and the reflected light formed by the second spectroscope 212 are 4 and 1, respectively. The intensities of the transmitted light and the reflected light formed by the third spectroscope 212 are 3 and 1, respectively. The intensities of the transmitted light and the reflected light formed by the fourth spectroscope 212 are 2 and 1, respectively. The intensities of the transmitted light and the reflected light formed by the fifth spectroscope 212 are 1 and 1, respectively. Ultimately, the intensities of the output light formed by the spectroscope of the laser optical path device 100 are equal.

[0058] In some specific embodiments, all beam splitters are polarizing beam splitters (PBS), which can split the incident unpolarized light into two perpendicular linearly polarized light beams, wherein the P-polarized light passes completely to form transmitted light, while the S-polarized light is reflected at a 45° angle to form reflected light, and the outgoing direction forms a 90° angle with the P light.

[0059] In other embodiments, there is no limitation on the type of the beam splitter, as long as it can ensure that the multiple beams of light emitted by the beam splitting mechanism 20 are parallel to each other.

[0060] In order to facilitate detection of the power of the outgoing light, referring to Figures 3 and 4, the laser optical path device 100 further includes a power detection element 30, which is located on the propagation path of the light transmitted by the second, most downstream beam splitter 212. Since the power detection element 30 can detect the power of the light transmitted by the second, most downstream beam splitter 212, the power of the outgoing light can be determined by the power of the light transmitted by the second, most downstream beam splitter 212, thereby controlling the power of the outgoing light. Generally, the power of the light transmitted by the second, most downstream beam splitter 212 is set equal to the power of all the outgoing light. Since the power detection element 30 can detect the power of the light transmitted by the second, most downstream beam splitter 212, the power of the outgoing light can be determined by the power of the light transmitted by the second, most downstream beam splitter 212, thereby controlling the power of the outgoing light.

[0061] It should be noted here that the power detection element 30 is not only able to detect the power of the transmitted light of the second downstream spectrometer 212, but also can play a certain light-blocking role to prevent the transmitted light of the second downstream spectrometer 212 from shining on other components and affecting them.

[0062] In some embodiments, referring to Figures 2-4 , the laser optical path device 100 further includes at least one second reflector 40, which is located on the propagation path of the emitted light and is used to reflect the emitted light toward the light splitting mechanism 20. In this way, the placement of the laser 10 is not restricted by position. That is, when the emitted light emitted by the laser 10 cannot be directly directed toward the light splitting mechanism 20, the second reflector 40 can receive the emitted light and reflect it toward the light splitting mechanism 20.

[0063] In one specific embodiment, referring again to FIG3 , the laser optical path device 100 includes three second reflectors 40 . The laser 10 emits light in a first direction. The light is reflected by the first second reflector 40 and then emitted in a second direction. The light is then reflected by the second second reflector 40 and then emitted in a third direction. Finally, the light is reflected by the third second reflector 40 and then emitted in the second direction toward the beam splitter 20 . The beam splitter 20 splits the light into at least two outgoing light beams, which are then emitted in the first direction. Thus, under the action of the three second reflectors 40 , the path of the light is redirected three times before being emitted toward the beam splitter 20 . Under the action of the beam splitters of the beam splitter 20 , each outgoing light beam is again emitted in the first direction, so that the outgoing light beam is parallel to the initial emission direction of the light.

[0064] The first, second, and third directions intersect. Specifically, the first, second, and third directions are perpendicular. As shown in FIG3 , the first direction is the length direction in FIG3 , i.e., the X direction; the second direction is the width direction in FIG3 , i.e., the Y direction; and the third direction is the Z direction in FIG3 , i.e., the height direction.

[0065] It is understandable that in other embodiments, there is no limitation on the number of second reflectors 40 included in the laser optical path device 100. For example, the number of second reflectors 40 can be one, two or more than three. Depending on the number of second reflectors 40, the number of times the emitted light changes direction is different.

[0066] In some embodiments, referring to Figures 2-4 , the laser optical path device 100 further includes a beam expander 50. The beam expander 50 is located along the propagation path of the emitted light and is used to expand the emitted light before it is directed toward the beam splitter 20. The arrangement of the beam expander 50 can expand the diameter of the laser beam and reduce the divergence angle of the beam.

[0067] It should be noted that the beam expander 50 may be located before the emitted light is emitted toward the second reflector 40 , or may be located on the path of the emitted light reflected by the second reflector 40 , which is not limited here.

[0068] The laser optical path device 100 also includes reflector assemblies 60. The number of reflector assemblies 60 is equal to the number of outgoing light beams and corresponds one-to-one. Each reflector assembly 60 includes an even number of first reflectors 61. The first reflectors 61 are positioned along the propagation path of the corresponding outgoing light beam to reflect the outgoing light beam. After being reflected by the corresponding reflector assembly 60, all outgoing light beams are emitted parallel to the first direction. The arrangement of the reflector assemblies 60 can extend the path of the outgoing light beam in the first direction, making the light beam as collimated as possible when the emission distance is long.

[0069] The spacing between the most downstream first reflectors 61 of each adjacent two reflector groups 60 is equal, so that the spacing between the beams formed by each adjacent two beams of outgoing light after reflection by the reflector group 60 is equal. It should be noted that the most downstream first reflector 61 of the reflector group 60 is the first reflector 61 from which the outgoing light ultimately exits the reflector group 60. If the most downstream first reflector 61 of the reflector group 60 is defined as the outgoing reflector, then the spacing between each two adjacent outgoing reflectors in the second direction is equal. This arrangement ensures that the ultimately emitted light beams are evenly spaced, thereby ensuring evenly spaced cutting or scribing.

[0070] Furthermore, each reflector assembly 60 includes two first reflectors 61. In a first direction, one of the first reflectors 61 in the reflector assembly 60 is opposite the beam splitter that emits the outgoing light beam, and the other first reflector 61 in the reflector assembly 60 is offset from the beam splitter that emits the outgoing light beam. In this way, while the reflector assembly 60 has a relatively simple structure, it can meet the collimation requirements for light beams emitted over long distances.

[0071] It is conceivable that in other embodiments, the number of first reflectors 61 included in the reflector group 60 is not limited. For example, each reflector group 60 may include four first reflectors or six first reflectors 61 .

[0072] In some embodiments, the laser optical path device 100 further includes light blocks 70 , the number of which is equal to and corresponds to the number of outgoing light beams. The light blocks 70 are located along the propagation path of the outgoing light beams to prevent the outgoing light beams from reaching the product. By providing the light blocks 70 , it is possible to control whether the outgoing light beams are emitted, thereby facilitating control of the number of lines drawn on the product.

[0073] It should be noted that, in this application, the specific location of the light barrier 70 is not limited, as long as the light barrier 70 is located on the propagation path of the outgoing light toward the product. In some specific embodiments, the light barrier 70 can be located between the beam splitter and the first first reflector 61 in the reflector assembly 60, or between the first reflectors 61 in the reflector assembly 60, or on the outgoing path of the outgoing light after being reflected by the reflector assembly 60.

[0074] Continuing with Figures 2-4 , another embodiment of the present application provides a laser optical system 1000 . This system 1000 includes at least two laser optical devices 100 . The beams generated by all laser optical devices 100 are parallel to each other. This arrangement increases the number of beams emitted, allowing more lines to be marked on a product each time, thereby improving marking efficiency.

[0075] Furthermore, in the second direction, the spacing between each two adjacent beam splitters is equal, so that the spacing between each two adjacent beams of emitted light formed by the beam splitting is equal, thereby facilitating equal-interval scribing or cutting.

[0076] It should be noted that when the power detection element 30 is located at one end of the laser optical path device 100 close to the adjacent laser optical path device 100, the provision of the reflector assembly 60 not only extends the path of the emitted light in the first direction, but also causes the emitted light emitted through the beam splitter to exit the laser optical path device 100 directly in the first direction, but instead exit the laser optical path device 100 in the first direction after being redirected by the reflector assembly 60. Precisely because of the provision of the reflector assembly 60, space for the power detection element 30 is reserved at the location where the two laser optical path devices 100 are close to each other, facilitating the installation of the power detection element 30.

[0077] In one specific embodiment, the laser optical path system 1000 includes two laser optical path devices 100. The laser optical path system 1000 has a central axis, and the two laser optical path devices 100 are symmetrically arranged on either side of the central axis. By arranging the two laser optical path devices 100 symmetrically on either side of the central axis, the spatial arrangement of the laser optical path system 1000 can be optimized, making the layout of the laser optical path system 1000 more reasonable and thereby reducing the floor space occupied.

[0078] Furthermore, each laser optical path device 100 includes six beam splitters. In this case, the laser optical path device 100 can split the emitted light into six outgoing beams, and the laser optical path system 1000 can simultaneously emit 12 outgoing beams. Thus, when all beams are not blocked by the light blocker 70, the laser optical path system 1000 can mark 12 lines on the product at a time.

[0079] It is understood that in other embodiments, the laser optical path system 1000 may further include other numbers of laser optical path devices 100, such as 3, 4, or more than 4. Similarly, when the laser optical path system 1000 includes other numbers of laser optical path devices 100, all laser optical path devices 100 may also be symmetrically arranged on both sides of the central axis.

[0080] In some embodiments, the laser optical system 1000 further includes an adjustment mechanism, and the beam splitting mechanism 20 is connected to the adjustment mechanism. The adjustment mechanism is capable of adjusting the spacing between the beam splitters. Specifically, the adjustment mechanism is capable of adjusting the spacing between the beam splitters to be evenly spaced. In this configuration, the adjustment mechanism can adjust the spacing between the beam splitters to change the spacing between the emitted beams, thereby changing the spacing between the lines on the product, thereby meeting the requirements for different spacings of lines.

[0081] Furthermore, the adjustment mechanism includes a driver and a transmission assembly. The beam splitters are connected to the driver via the transmission assembly. The driver can drive the beam splitters to move via the transmission assembly to change the spacing between the beam splitters. Specifically, the driver is a motor. It is contemplated that in other embodiments, the type of driver is not limited, and the driver can also be a cylinder, etc.

[0082] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A laser optical path device, characterized in that: include: Laser (10); A light splitting mechanism (20), comprising a first light splitter (211) and a second light splitter (212), wherein the first light splitter (211) is located on a propagation path of light emitted by the laser (10), and the transmitted light or reflected light of the first light splitter (211) can be directed toward the second light splitter (212), and when the light splitting mechanism (20) comprises at least two second light splitters (212), the transmitted light of the second light splitter (212) located upstream can be directed toward the second light splitter (212) located downstream; The beam splitters of the beam splitting mechanism (20) are parallel to each other, so that the reflected light emitted by all the beam splitters is emitted in parallel along a first direction to form at least two beams of output light for marking a line on a product, or the transmitted light of the first beam splitter (211) and the reflected light of all the second beam splitters (212) are emitted in parallel along the first direction to form at least two beams of output light for marking a line on a product.

2. The laser optical path device according to claim 1, characterized in that: The distance between each two adjacent beam splitters is equal, so that the distance between each two adjacent beams of the emergent light formed by the beam splitting is equal.

3. The laser optical path device according to claim 1, characterized in that: The powers of all the outgoing lights formed by the light splitting of the laser optical path device are equal.

4. The laser optical path device according to claim 1, characterized in that: The laser optical path device also includes a half-wave plate. Each of the beam splitters is provided with a corresponding half-wave plate, and the light intensity ratio of the transmitted light and the reflected light formed by the beam splitting of the corresponding beam splitter is adjusted by the half-wave plate.

5. The laser optical path device according to claim 1, characterized in that: The light splitting mechanism (20) comprises 6 light splitters.

6. The laser optical path device according to claim 1, characterized in that: The laser optical path device further comprises a reflector group (60), the number of the reflector groups (60) being equal to the number of the emitted lights and corresponding one to one; Each of the reflector groups (60) comprises an even number of first reflectors (61), wherein the first reflectors (61) are arranged on a propagation path of the corresponding outgoing light to reflect the outgoing light, and all the outgoing light is emitted in parallel along the first direction after being reflected by the corresponding reflector group (60).

7. The laser optical path device according to claim 6, characterized in that: The spacing between the first reflectors (61) located most downstream of each two adjacent reflector groups (60) is equal, so that the spacing between light beams formed by each two adjacent beams of the outgoing light after being reflected by the reflector group (60) is equal.

8. The laser optical path device according to claim 6 or 7, characterized in that: The reflector group (60) comprises two first reflectors (61); in the first direction, one of the first reflectors (61) in the reflector group (60) is opposite to the beam splitter that emits the outgoing light, and the other of the first reflectors (61) in the reflector group (60) is offset from the beam splitter that emits the outgoing light.

9. The laser optical path device according to claim 1, characterized in that: The laser light path device further comprises light blocks (70), the number of the light blocks (70) being equal to the number of the emitted lights and corresponding one to one; The light blocker (70) is located on the propagation path of the outgoing light so as to block the outgoing light from being emitted.

10. The laser optical path device according to claim 1, characterized in that: The laser optical path device also includes at least one second reflector (40), which is located on the propagation path of the emitted light and is used to reflect the emitted light to the light splitting mechanism (20).

11. The laser optical path device according to claim 10, characterized in that: The laser optical path device comprises three second reflectors (40), the laser (10) emits emission light along the first direction, the emission light is emitted to the first second reflector (40) and is reflected therefrom and then emitted along the second direction, the emission light is then emitted to the second second reflector (40) and is reflected therefrom and then emitted along the third direction, the emission light is then emitted to the third second reflector (40) and is reflected therefrom and then emitted along the second direction to the light splitting mechanism (20), the light splitting mechanism (20) splits the emission light into at least two outgoing light beams and then emits them along the first direction; The first direction, the second direction and the third direction intersect each other.

12. The laser optical path device according to claim 1, characterized in that: The laser optical path device also includes a beam expander (50), which is located on the propagation path of the emitted light and is used to expand the emitted light and then direct it toward the light splitting mechanism (20).

13. The laser optical path device according to claim 1, characterized in that: The beam splitter is a polarization beam splitter prism.

14. The laser optical path device according to any one of claims 1 to 13, characterized in that: The laser optical path device further comprises a power detection element (30), which is located on the propagation path of the transmitted light of the second beam splitter (212) at the most downstream so as to be able to detect the power of the transmitted light.

15. A laser optical path system, characterized in that: The laser optical path system comprises at least two laser optical path devices according to any one of claims 1 to 14, and the emitted lights formed by the light splitting of all the laser optical path devices are parallel to each other.

16. The laser optical path system according to claim 15, characterized in that: The distance between each two adjacent beam splitters is equal, so that the distance between each two adjacent beams of the emergent light formed by the beam splitting is equal.

17. The laser optical path system according to claim 15 or 16, characterized in that: The laser optical path system comprises two laser optical path devices. The laser optical path system has a central axis. The two laser optical path devices are symmetrically arranged on both sides of the central axis.

18. The laser optical path system according to claim 15, characterized in that: The laser optical path system also includes an adjustment mechanism, the light splitting mechanism (20) is connected to the adjustment mechanism, and the adjustment mechanism can adjust the distance between each of the light splitters.

19. The laser optical path system according to claim 18, characterized in that: The adjustment mechanism includes a driving member and a transmission assembly. The beam splitter is connected to the driving member through the transmission assembly. The driving member can drive the beam splitter to move through the transmission assembly to change the spacing between the beam splitters.

20. The laser optical path system according to claim 15, characterized in that: The laser optical path device further comprises a power detection element (30), wherein the power detection element (30) is located on the propagation path of the transmitted light of the second beam splitter (212) at the most downstream so as to be able to detect the power of the transmitted light; The power detection element (30) is located at one end of the laser light path device close to the laser light path device adjacent thereto; The laser optical path device further comprises a reflector group (60), the number of the reflector groups (60) being equal to the number of the outgoing lights and corresponding one to one; each reflector group (60) comprises an even number of first reflectors (61), the first reflectors (61) being arranged on the propagation path of the outgoing lights corresponding thereto to reflect the outgoing lights, and all the outgoing lights being reflected by the corresponding reflector groups (60) are emitted in parallel along the first direction.

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