WO2025087071A1 - Laser light path apparatus and laser light path system - Google Patents

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

The present invention relates to the field of laser cutting technology, and in particular to a laser optical path device and a laser optical path system.

Background Art

Laser cutting is an important way to process products and is widely used in various fields. For example, in the preparation process of solar cells, it is necessary to scribe the solar cell substrate multiple times. Each time the solar cell substrate is laser-scribed, multiple laser beams need to be shot in parallel onto the solar cell substrate. In order to achieve the purpose of shooting multiple laser beams each time, a laser optical path device is required.

The traditional laser optical path device includes a laser, a beam splitter and a reflector. The laser emits laser light to the beam splitter for beam splitting. The light split by the beam splitter is reflected by multiple reflectors to form two laser beams. Thus, when more than two laser beams need to be formed, multiple laser optical path devices need to be set up, resulting in a complex structure.

Summary of the invention

Based on this, it is necessary to provide a laser optical path device and a laser optical path system with a simple structure in order to solve the problem that the traditional laser optical path device has a complex structure.

A laser optical path device, comprising:

Lasers;

The light splitting mechanism comprises a first light splitter and a second light splitter, wherein the first light splitter is located on the propagation path of the emission light emitted by the laser, and the transmitted light or reflected light of the first light splitter can be emitted to the second light splitter. When the light splitting mechanism comprises at least two of the second light splitters, the light splitter located upstream The transmitted light of the second beam splitter can be directed to the second beam splitter located downstream;

The beam splitters of the beam splitting mechanism 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 lines on the product, or the transmitted light of the first beam splitter and the reflected light of all the second beam splitters are emitted in parallel along the first direction to form at least two beams of output light for marking lines on the product.

In one embodiment, 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.

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

In one of the embodiments, 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 light intensity ratio of the transmitted light and the reflected light formed by the corresponding beam splitter is adjusted by the half-wave plate.

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

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;

Each group of the reflector groups includes an even number of first reflectors, and the first reflectors are arranged on the 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.

In one embodiment, the spacing between the first reflectors located at the most downstream of each two adjacent groups of reflectors 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.

In one embodiment, the reflector group includes two first reflectors, and in the first direction, one of the first reflectors in the reflector group is aligned with the splitter that emits the outgoing light. The optical mirrors are opposite to each other, and another first reflector in the reflector group is offset from the beam splitter for emitting the outgoing light.

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

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

In one of the embodiments, the laser optical path device further includes at least one second reflector, and the second reflector is located on the propagation path of the emitted light, so as to reflect the emitted light to the light splitting mechanism.

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 then is reflected and then emitted along the second direction, the emission light is then emitted to the second second reflector and then is reflected and then emitted along the third direction, the emission light is then emitted to the third second reflector and then is reflected and then emitted to the light splitting mechanism along the second direction, the light splitting mechanism 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.

In one of the embodiments, the laser optical path device further comprises a beam expander, and the beam expander is located on the propagation path of the emitted light, so as to expand the emitted light and direct it toward the beam splitting mechanism.

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

In one of the embodiments, the laser optical path device further includes a power detection element, and the power detection element 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.

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.

In one embodiment, the spacing between each two adjacent beam splitters is equal, so that the beam splitters The intervals between each two adjacent beams of the emitted light are equal.

In one of the embodiments, 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.

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.

In one embodiment, the adjustment mechanism includes a driving member and a transmission assembly, the beam splitter is connected to the driving member via the transmission assembly, and the driving member can drive the beam splitter to move via the transmission assembly to change the spacing between the beam splitters.

In one embodiment, the laser optical path device further comprises a power detection element, and the power detection element 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;

The power detection element is located at one end of the laser light path device close to the adjacent laser light path device;

The laser optical path device also includes a reflector group, the number of which is equal to the number of the outgoing lights and corresponds one to one; each group of the reflector groups includes an even number of first reflectors, and the first reflectors 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.

The above-mentioned laser optical path device and laser optical path system can be realized by setting a corresponding number of beam splitters 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

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

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

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

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

Description of reference numerals:

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

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying The term "a first feature" or "a second feature" may indicate relative importance or implicitly indicate the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Referring to FIG. 1 and FIG. 2 , an embodiment of the present application provides a laser optical path device 100, which is applied to a laser scribing device to scribing on a product, thereby realizing product processing. 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 laser scribing device can scribing in the P3 process. It is conceivable that in other embodiments, the type of product scribed by the laser optical path device 100 is not limited.

The laser optical path device 100 includes a laser 10 and a beam splitter 20. The laser 10 can emit emission light. The beam splitter 20 can split the emission light emitted by the laser 10 into at least two outgoing light beams. The outgoing light beams are used to mark lines on products.

The spectroscopic mechanism 20 includes a first spectroscope 211 and at least one second spectroscope 212. The spectroscope is used to split the incident light into two beams of transmission and reflection having a certain light intensity ratio. The spectroscope is usually used at an angle, and it can conveniently separate the incident light into two parts, namely, the reflected light and the transmitted light. The first spectroscope 211 is located on the propagation path of the emitted light emitted by the laser 10, that is, the emitted light of the laser 10 forms the incident light incident to the first spectroscope 211. The transmitted light or reflected light of the first spectroscope 211 can be directed to the second spectroscope 212. When the transmitted light of the first spectroscope 211 is directed to the second spectroscope 212, the transmitted light of the first spectroscope 211 forms the incident light incident to the second spectroscope 212. When the reflected light of the first spectroscope 211 is directed to the second spectroscope 212, the reflected light of the first spectroscope 211 forms the incident light incident to the second spectroscope 212. Specifically, the spectroscopic mechanism 20 includes at least two second spectroscopes 212 . The transmitted light of the upstream second spectroscope 212 can be directed to the downstream second spectroscope 212 . At this time, the transmitted light of the upstream second spectroscope 212 forms the incident light incident on the downstream second spectroscope 212 .

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.

In one embodiment, the transmitted light of the first beam splitter 211 is directed to the second beam splitter 212, and the transmitted light of the second beam splitter 212 located upstream can be directed to the second beam splitter 212 located downstream. The reflected light emitted by the first beam splitter 211 is parallel to the reflected light emitted by the second beam splitter 212, so that the light 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 of the first beam splitter 211 is emitted to the second beam splitter 212, and the transmitted light of the second beam splitter 212 located upstream can be emitted to the second beam splitter 212 located downstream. At this time, the transmitted light of the first beam splitter 211 is parallel to the reflected light of all the second beam splitters 212, so that the light 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.

The laser optical path device 100 provided in the embodiment of the present application can be realized by setting a corresponding number of beam splitters when at least two mutually parallel outgoing light beams need to be emitted. There is no need to replicate 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.

Optionally, the light splitting mechanism 20 includes 6 beam splitters, and the laser light path device 100 can split the emitted light into 6 outgoing light 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.

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 equal-spaced cutting or scribing. The first direction intersects the second direction, specifically, the first direction is perpendicular to the second direction.

Furthermore, the powers of all the outgoing lights formed by the laser optical path device 100 are 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. Since the sum of the intensities of the transmitted light and the reflected light divided by the beam splitter is equal to the intensity of the incident light incident thereon. In this way, by adjusting the light intensity ratio of the transmitted light and the reflected light formed by the beam splitting of each beam splitter, the intensity of the outgoing light formed by the laser optical path device 100 can be made equal, that is, the power of the outgoing light formed by the laser optical path device 100 (the intensity of light is equal to the power of light per unit area) is equal.

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 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.

In a specific embodiment, the light splitting mechanism 20 includes 6 beam splitters, and the reflected light emitted by all the beam splitters forms the above-mentioned output light. The light intensity incident on the first beam splitter 211 can be set to 7, the intensities of the transmitted light and the reflected light formed by the first beam splitter 211 are 6 and 1 respectively, the intensities of the transmitted light and the reflected light formed by the first second beam splitter 212 are 5 and 1 respectively, the intensities of the transmitted light and the reflected light formed by the second second beam splitter 212 are 4 and 1 respectively, the intensities of the transmitted light and the reflected light formed by the third second beam splitter 212 are 3 and 1 respectively, the intensities of the transmitted light and the reflected light formed by the fourth second beam splitter 212 are 2 and 1 respectively, and the intensities of the transmitted light and the reflected light formed by the fifth second beam splitter 212 are 1 and 1 respectively, so that the intensity of the output light formed by the beam splitting of the laser optical path device 100 is finally equal.

In some specific embodiments, all beam splitters are polarization beam splitters (PBS), which can split incident non-polarized light into two perpendicular linear polarized light beams, wherein the P polarized light passes completely to form transmitted light, and the S polarized light is reflected at an angle of 45° to form reflected light, and the outgoing direction forms a 90° angle with the P light.

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.

In order to facilitate the detection of the power of the outgoing light, referring to FIG. 3 and FIG. 4 , the laser optical path device 100 further includes 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. Since the power detection element 30 can detect the power of the transmitted light of the second beam splitter 212 at the most downstream, the power of the outgoing light can be obtained through the power of the transmitted light of the second beam splitter 212 at the most downstream, thereby controlling the power of the outgoing light. Generally, the power of the transmitted light of the second beam splitter 212 at the most downstream is set equal to the power of all the outgoing lights. Since the power detection element 30 can detect the power of the transmitted light of the second beam splitter 212 at the most downstream, the power of the outgoing light can be obtained through the power of the transmitted light of the second beam splitter 212 at the most downstream, thereby controlling the power of the outgoing light.

It should be noted here that the power detection element 30 can not only detect the power of the transmitted light of the second beam splitter 212 at the most downstream, but also play a certain light blocking role to prevent the transmitted light of the second beam splitter 212 at the most downstream from shining on other components and affecting the components.

In some embodiments, referring to FIGS. 2 to 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 to the light splitting mechanism 20. In this way, the arrangement of the laser 10 is not limited by the position, that is, when the emitted light emitted by the laser 10 cannot be directly emitted to the light splitting mechanism 20, the second reflector 40 can receive the emitted light and reflect it to the light splitting mechanism 20.

In a specific embodiment, referring to FIG. 3 , the laser optical path device 100 includes three second reflectors 40. The laser 10 emits emission light along a first direction, and the emission light is emitted along a second direction after being reflected by the first second reflector 40, and then emitted along a third direction after being reflected by the second second reflector 40, and finally emitted along a second direction after being reflected by the third second reflector 40, and then emitted toward the light splitting mechanism 20, which splits the emission light into at least two outgoing light beams and emits them along the first direction. In this way, under the action of the three second reflectors 40, the path of the emission light is emitted toward the light splitting mechanism 20 after changing directions three times, and under the action of the beam splitters of the light splitting mechanism 20, each outgoing light beam is emitted along the first direction again, so that the outgoing light beam is parallel to the initial emission direction of the emission light beam.

The first direction, the second direction and the third direction intersect. Specifically, the first direction, the second direction and the third direction are perpendicular. As shown in FIG3 , the first direction is the length direction in FIG3 , that is, the X direction, the second direction is the width direction in FIG3 , that is, the Y direction, and the third direction is the Z direction in FIG3 , that is, the height direction.

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.

In some embodiments, referring to Figures 2 to 4, the laser optical path device 100 further 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 emit it toward the light splitting mechanism 20. The arrangement of the beam expander 50 can expand the diameter of the laser beam and reduce the divergence angle of the beam.

It should be noted that the beam expander 50 may be located before the emitted light is emitted to 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.

The laser optical path device 100 also includes a reflector group 60, the number of which is equal to the number of outgoing lights and corresponds one to one. Each reflector group 60 includes an even number of first reflectors 61, which are arranged on the propagation path of the outgoing light corresponding thereto to reflect the outgoing light, and all the outgoing lights are reflected by the corresponding reflector group 60 and then emitted in parallel along the first direction. The arrangement of the reflector group 60 can extend the path of the outgoing light in the first direction, and make the light beam as collimated as possible when the emission distance is long.

The spacing between the first reflectors 61 located at the most downstream of each two adjacent reflector groups 60 is equal, so that the spacing between the light beams formed by each two adjacent outgoing light beams after being reflected by the reflector group 60 is equal. It should be noted here that the first reflector 61 located at the most downstream of the reflector group 60 is the first reflector 61 from which the outgoing light finally exits the reflector group 60. If the first reflector 61 located at the most downstream in the reflector group 60 is defined as the outgoing reflector, the spacing between each two adjacent outgoing reflectors in the second direction is equal, and such a setting can ensure that the finally emitted light beams are arranged at equal spacing, thereby ensuring equal spacing cutting or scribing.

Furthermore, each reflector group 60 includes 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 beam of outgoing light, and the other first reflector 61 in the reflector group 60 is offset from the beam splitter that emits the beam of outgoing light. In this way, when the reflector group 60 has a relatively simple structure, the collimation requirement when the beam is emitted at a long distance is met.

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 also include 4 first reflectors or 6 first reflectors 61 .

In some embodiments, the laser optical path device 100 further includes light blocks 70, and the number of light blocks 70 is equal to the number of outgoing lights and corresponds one to one. The light blocks 70 are located on the propagation path of the outgoing light to block the outgoing light from being emitted to the product. By providing the light blocks 70, it is possible to control whether the outgoing light is emitted, thereby facilitating the control of the number of lines on the product.

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

Continuing to refer to FIG. 2 to FIG. 4 , another embodiment of the present application further provides a laser optical path system 1000, which includes at least two laser optical path devices 100, and the outgoing lights formed by the light splitting of all the laser optical path devices 100 are parallel to each other. This arrangement increases the number of outgoing lights, and more lines can be drawn on the product each time, thereby improving the drawing efficiency.

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-spaced scribing or cutting.

It should be noted that when the power detection element 30 is located at one end of the laser light path device 100 close to the adjacent laser light path device 100, the setting of the reflector group 60 can not only extend the path of the emitted light in the first direction. At the same time, the emitted light emitted by the beam splitter does not directly emit from the laser light path device 100 along the first direction, but is emitted from the laser light path device 100 along the first direction after being changed in direction by the reflector group 60. It is precisely because of the setting of the reflector group 60 that a setting space for setting the power detection element 30 can be reserved at the position where the two laser light path devices 100 are close to each other, so as to facilitate the setting of the power detection element 30.

In a 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. The two laser optical path devices 100 are symmetrically arranged on both sides of the central axis. By arranging two laser light path devices 100 symmetrically on both sides of the central axis, the spatial arrangement of the laser light path system 1000 can be optimized, making the layout of the laser light path system 1000 more reasonable, thereby reducing the occupied area.

Furthermore, each laser optical path device 100 includes 6 beam splitters, and the laser optical path device 100 can split the emitted light into 6 outgoing light beams, and the laser optical path system 1000 can synchronously emit 12 outgoing light beams. In this way, when all the light beams are not blocked by the light blocker 70, the laser optical path system 1000 can draw 12 lines on the product each time.

It is understandable that in some other embodiments, the laser optical path system 1000 may also 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.

In some embodiments, the laser optical path system 1000 further includes an adjustment mechanism, and the light splitting mechanism 20 is connected to the adjustment mechanism, and the adjustment mechanism can adjust the spacing between each light splitter. Specifically, the adjustment mechanism can adjust the spacing between each light splitter at equal intervals. In this way, the adjustment mechanism can adjust the spacing between each light splitter so that the spacing between each emitted light changes, thereby changing the spacing between the lines on the product, thereby meeting the requirements for line markings with different spacings.

Further, the adjustment mechanism includes a driving member and a transmission assembly, the spectroscope is connected to the driving member through the transmission assembly, and the driving member can drive the spectroscope to move through the transmission assembly to change the spacing between the spectroscopes. Specifically, the driving member is a motor. It is conceivable that in some other embodiments, the type of the driving member is not limited, such as the driving member can also be a cylinder, etc.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. There is no contradiction in the combination of technical features, and all should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims (20)

A laser optical path device, characterized by comprising: 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. The laser optical path device according to claim 1 is characterized in that the spacing between each two adjacent beams of the beam splitters is equal, so that the spacing between each two adjacent beams of the output light formed by the beam splitting is equal. The laser optical path device according to claim 1 is characterized in that the powers of all output lights formed by the splitting of the laser optical path device are equal. The laser optical path device according to claim 1 is characterized in that the laser optical path device also includes a half-wave plate, and each of the beam splitters is provided with a corresponding half-wave plate, and the half-wave plate is used to adjust the light intensity ratio of the transmitted light and the reflected light formed by the corresponding beam splitting of the beam splitter. The laser optical path device according to claim 1, characterized in that the light splitting mechanism (20) comprises 6 light splitters. 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) is equal to the number of the emitted light and One to one correspondence; 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). The laser optical path device according to claim 6 is characterized in that the spacing between the first reflectors (61) located at the most downstream of each two adjacent groups of the reflector groups (60) is equal, so that the spacing between the light beams formed after each two adjacent beams of the outgoing light are reflected by the reflector groups (60) is equal. The laser optical path device according to claim 6 or 7 is characterized in that the reflector group (60) includes two first reflectors (61), and 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 first reflector (61) in the reflector group (60) is offset from the beam splitter that emits the outgoing light. The laser light path device according to claim 1, characterized in that the laser light path device further comprises light blocks (70), and the number of the light blocks (70) is equal to the number of the emitted lights and corresponds 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. The laser optical path device according to claim 1 is characterized in that the laser optical path device also includes at least one second reflector (40), and the second reflector (40) is located on the propagation path of the emitted light to reflect the emitted light to the splitting mechanism (20). The laser optical path device according to claim 10 is 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 then emitted along the second direction, and the emission light is then reflected by the second reflector (40). The emitted light is emitted toward the second second reflector (40) and then reflected and emitted along a third direction. The emitted light is then emitted toward the third second reflector (40) and then reflected and emitted toward the light splitting mechanism (20) along the second direction. The light splitting mechanism (20) splits the emitted 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. The laser optical path device according to claim 1 is characterized in that the laser optical path device also includes a beam expander (50), and the beam expander (50) is located on the propagation path of the emitted light, so as to expand the emitted light and then emit it toward the light splitting mechanism (20). The laser optical path device according to claim 1 is characterized in that the beam splitter is a polarization beam splitter prism. The laser optical path device according to any one of claims 1 to 13 is characterized in that the laser optical path device also includes a power detection element (30), and 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. 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 output lights formed by the light splitting of all the laser optical path devices are parallel to each other. The laser optical path system according to claim 15 is characterized in that the distance between each two adjacent beams of the beam splitters is equal, so that the distance between each two adjacent beams of the output light formed by the beam splitting is equal. The laser optical path system according to claim 15 or 16 is characterized in that the laser optical path system comprises 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. The laser optical path system according to claim 15 is characterized in that the laser optical path system further comprises an adjustment mechanism, the light splitting mechanism (20) is connected to the adjustment mechanism, and the adjustment mechanism The spacing between the beam splitters can be adjusted. The laser optical path system according to claim 18 is 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, and the driving member can drive the beam splitter to move through the transmission assembly to change the spacing between each beam splitter. The laser optical path system according to claim 15, characterized in that the laser optical path device further comprises a power detection element (30), and 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.