Blue light engraving laser device with correction function

Abstract

The utility model discloses a blue light engraving laser device with a correction function. The blue light engraving laser device comprises a blue light laser module, a red light correction module, a dichroic sheet and a focusing lens, the blue light laser module comprises a blue light laser emission source group, a polarization light combination lens group, a composite lens assembly and a space stacking lens. The red light correction module comprises a red light laser emission source and a red light reflector plate; the blue laser emission source group is used for emitting blue light, and the blue light sequentially passes through the polarization light combination lens group, the composite lens assembly, the space stacking lens, the dichroscope and the focusing lens; the red light laser emission source is used for emitting red light, and the red light sequentially passes through the red light reflection sheet, the dichroic sheet and the focusing lens; the polarization light combination lens group is used for the polarization state of blue light, and the focusing lens focuses red light and blue light. Red light is adopted to replace blue light for correction, and the problem that the correction accuracy is low due to the fact that a traditional blue light engraving laser device emits the blue light and stray light spots of the blue light are trailed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of blue light engraving laser devices, in particular to a blue light engraving laser device with a correction function. Background Art

[0002] Currently, there are blue light engraving lasers on the market, including pure blue light engraving lasers and blue light composite infrared light engraving lasers. Whether it is to calibrate the focus position of a pure blue light laser or to calibrate the focus overlap of a blue light composite infrared light, the blue light needs to be calibrated in a charged state.

[0003] However, most blue light emitters (LD-TO) on the market currently have a stray light source with a divergence angle greater than the emitting laser source. The stray light source will become more obvious as the distance from the blue light emitter increases, and after passing through the focusing lens, an obvious stray light spot tail will be formed at the focal position, which will affect the focus correction of the blue light engraving laser. Utility Model Content

[0004] In view of the above defects, the utility model proposes a blue light engraving laser device with a correction function, which uses red light instead of blue light for correction, solving the problem that traditional blue light engraving laser devices emit blue light and the stray light spot tailing of the blue light leads to low correction accuracy.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A blue light engraving laser device with a correction function, comprising a blue light laser module, a red light correction module, a dichroic film and a focusing lens;

[0007] The blue laser module includes a blue laser emission source group, a polarized light combining lens group, a composite lens assembly and a spatial stacking lens; the red light correction module includes a red laser emission source and a red light reflector;

[0008] The blue laser emission source group is used to emit blue light, and the blue light passes through the polarized light combining lens group, the composite lens assembly, the spatial stacking lens, the dichroic mirror and the focusing lens in sequence; the red laser emission source is used to emit red light, and the red light passes through the red light reflecting sheet, the dichroic sheet and the focusing lens in sequence;

[0009] The polarized light combining lens group is used for the polarization state of blue light, the composite lens assembly is used for adjusting the divergence angles of the fast axis and the slow axis in the blue light, the spatially stacked lens is used for reflecting the blue light to the dichroic film, the dichroic film is used for reflecting the blue light and transmitting the red light, and the focusing lens focuses the red light and the blue light.

[0010] The blue laser emission source group includes, from top to bottom, a first horizontal blue light emitter and a second horizontal blue light emitter;

[0011] The polarized light combining lens group includes a half-wave plate, a blue light reflecting plate and a polarizer. The center of the first blue light emitter, the center of the half-wave plate and the center of the blue light reflecting plate are all located on the same horizontal line. The half-wave plate is vertically installed at the output end of the first blue light emitter. The top of the half-wave plate forms an angle of 45° with the blue light reflecting plate.

[0012] The center of the second blue light emitter and the center of the polarizer are located on the same horizontal line, the polarizer is obliquely installed at the output end of the first blue light reflector, the polarizer and the blue light reflector are arranged parallel to each other, and the light transmission axis of the polarizer is in the horizontal direction;

[0013] The first blue light passes through a half-wave plate, a blue light reflecting plate, a composite lens assembly, a spatially stacked lens, a dichroic plate and a focusing lens in sequence; the second blue light passes through a polarizing plate, a composite lens assembly, a spatially stacked lens, a dichroic plate and a focusing lens in sequence.

[0014] The composite lens assembly comprises a slow axis adjustment lens group and a fast axis adjustment lens group, wherein the slow axis adjustment lens group is used to adjust the slow axis divergence angle of the second blue light, and the fast axis adjustment lens group is used to adjust the fast axis divergence angle of the second blue light.

[0015] The slow axis adjustment lens group includes a first plano-concave cylindrical mirror and a first plano-convex cylindrical mirror in sequence along the propagation path of the blue light, and the fast axis adjustment lens group includes a second plano-convex cylindrical mirror and a second plano-concave cylindrical mirror in sequence along the propagation path of the blue light, and the second plano-concave cylindrical mirror and the second plano-convex cylindrical mirror are both located between the first plano-concave cylindrical mirror and the first plano-convex cylindrical mirror;

[0016] The first plano-concave cylindrical mirror, the second plano-convex cylindrical mirror, the second plano-concave cylindrical mirror and the first plano-convex cylindrical mirror are all arranged vertically, and the center of the second blue light emitter, the center of the first plano-concave cylindrical mirror, the center of the second plano-convex cylindrical mirror, the center of the second plano-concave cylindrical mirror and the center of the first plano-convex cylindrical mirror are all located on the same horizontal line.

[0017] There are at least two blue light laser modules, and the polarized light combining lens groups of two adjacent blue light laser modules are symmetrically arranged along the horizontal axis.

[0018] The installation reference angle of the spatial stacked lens is 45°, the center of the spatial stacked lens and the center of the polarizer are located on the same horizontal line, the spatial stacked lens and the polarizer are arranged vertically, and the spatial stacked lens and the dichroic film are arranged parallel to each other.

[0019] The red light laser emission source is vertically installed below the composite lens assembly, the center of the red light reflection sheet and the center of the red light laser emission source are located on the same vertical line, the center of the red light reflection sheet and the center of the dichromatic sheet are located on the same horizontal line, and the red light reflection sheet and the dichromatic sheet are arranged parallel to each other.

[0020] A horizontal collimating lens is provided at the output end of the red laser emission source. The collimating lens is used to collimate the red light. The red light passes through the collimating lens, the red light reflecting plate, the dichroic plate and the focusing lens in sequence.

[0021] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0022] 1. The blue laser emission source group emits blue light outward, the polarized light combining lens group can change the polarization state of the blue light, the composite lens assembly can adjust the divergence angles of the fast axis and the slow axis in the blue light, and the spatial stacking lens reflects the adjusted blue light onto the dichroic film. At this time, the dichroic film reflects the blue light, so that the blue light is reflected onto the focusing lens and focused on the focusing lens to form a laser beam, thereby achieving the effect of fast and precise engraving of various materials.

[0023] 2. The red light calibration module can emit red light outward, which is reflected on the red light reflector, then passes through the dichroic film, and then is focused on the focusing lens. Since both the blue light and the red light pass through the dichroic film and the focusing lens, the red light overlaps with the blue light, ensuring that the focal points of the blue light and the red light are at the same position. The red light emitted by the red laser emission source is more suitable for calibration applications. The main difference is that the threshold power of red light is smaller, and it is not easy to cause exposure during the calibration process; secondly, red light has a smaller spot size, which can provide a more accurate light spot for the calibration result; most importantly, the red light has no obvious trailing spot after focusing, which will not interfere with the calibration result. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a blue laser module with a correction function according to an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of a blue laser module according to an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of a red light correction module in one embodiment of the utility model;

[0027] Figure 4 is a schematic diagram of a blue laser module with a correction function according to another embodiment of the present invention;

[0028] Among them, 1. Blue laser module; 11. Blue laser emission source group; 111. First blue light emitter; 112. Second blue light emitter; 12. Polarized light combining lens group; 121. Half-wave plate; 122. Blue light reflector; 123. Polarizer; 13. Plano-convex-plano-concave cylindrical lens group; 131. First plano-concave cylindrical mirror; 132. First plano-convex cylindrical mirror; 133. Second plano-concave cylindrical mirror; 134. Second plano-convex cylindrical mirror; 14. Spatially stacked lens; 2. Red light correction module; 20. Red laser emission source; 21. Collimating lens; 22. Red light reflector; 3. Dichroic film; 4. Focusing lens. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0030] In the description of the present invention, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship 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 cannot be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is more than two.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "splicing", 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Combine the following Figures 1 to 4 , describing a blue light engraving laser device with a correction function according to an embodiment of the utility model.

[0034] A blue light engraving laser device with a correction function comprises a blue light laser module 1, a red light correction module 2, a dichroic film 3 and a focusing lens 4;

[0035] The blue laser module 1 includes a blue laser emission source group 11, a polarized light combining lens group 12, a composite lens assembly and a spatial stacking lens 14; the red light correction module 2 includes a red laser emission source 20 and a red light reflector 22;

[0036] The blue laser emission source group 11 is used to emit blue light, and the blue light passes through the polarized light combining lens group 12, the composite lens assembly, the spatial stacking lens 14, the dichroic mirror and the focusing lens 4 in sequence; the red laser emission source 20 is used to emit red light, and the red light passes through the red light reflecting plate 22, the dichroic plate 3 and the focusing lens 4 in sequence;

[0037] The polarized light combining lens group 12 is used for the polarization state of blue light, the composite lens assembly is used for adjusting the divergence angles of the fast axis and the slow axis in the blue light, the spatially stacked lens 14 is used for reflecting the blue light to the dichroic film 3, the dichroic film 3 is used for reflecting blue light and transmitting red light, and the focusing lens 4 focuses the red light and the blue light.

[0038] A blue light engraving laser device with a correction function in the present solution is provided with a blue light laser module 1 and a red light correction module 2. The blue light laser module 1 can emit blue light, and the blue light can process materials. The red light correction module 2 can correct the focus of the blue light engraving laser device of the present solution, thereby improving the engraving accuracy of the blue light engraving laser device of the present solution.

[0039] The blue laser emission source group 11 emits blue light outward, the polarized light combining lens group 12 can change the polarization state of the blue light, the composite lens assembly can adjust the divergence angles of the fast axis and the slow axis in the blue light, and the spatial stacking lens 14 reflects the adjusted blue light onto the dichroic film 3. At this time, the dichroic film 3 reflects the blue light, so that the blue light is reflected onto the focusing lens 4 and focused on the focusing lens 4 to form a laser beam, thereby achieving the effect of fast and accurate engraving of various materials.

[0040] In addition, the red light calibration module can emit red light outward, the red light is reflected on the red light reflection sheet 22, then passes through the dichroic sheet 3, and then is focused on the focusing lens 4. Since both the blue light and the red light pass through the dichroic sheet 3 and the focusing lens 4, the red light overlaps with the blue light, which can ensure that the focal points of the blue light and the red light are located at the same position.

[0041] Compared with blue light, the red light emitted by the red laser emission source 20 is more suitable for correction applications. The main difference is that the threshold power of red light is smaller, and it is not easy to cause exposure during the correction process; secondly, red light has a smaller spot size, which can provide a more accurate light spot for the correction result; most importantly, the red light has no obvious trailing spot after focusing, which will not interfere with the correction result.

[0042] In this solution, red light is used instead of blue light for correction, which solves the problem that the traditional blue light engraving laser device emits blue light, and the stray light spot tailing of the blue light leads to low correction accuracy.

[0043] The blue laser emission source group 11 includes a first blue light emitter 111 and a second blue light emitter 112 in sequence from top to bottom;

[0044] The polarized light combining lens group 12 comprises a half-wave plate 121, a blue light reflecting plate 122 and a polarizer 123. The center of the first blue light emitter 111, the center of the half-wave plate 121 and the center of the blue light reflecting plate 122 are all located on the same horizontal line. The half-wave plate 121 is vertically installed at the output end of the first blue light emitter 111. The top of the half-wave plate 121 forms an angle of 45° with the blue light reflecting plate 122.

[0045] The center of the second blue light emitter 112 and the center of the polarizer 123 are located on the same horizontal line, the polarizer 123 is obliquely installed at the output end of the first blue light reflector, the polarizer 123 and the blue light reflector 122 are arranged parallel to each other, and the light transmission axis of the polarizer 123 is in the horizontal direction;

[0046] The first blue light passes through the half-wave plate 121, the blue light reflecting plate 122, the composite lens assembly, the spatially stacked lens 14, the dichroic plate 3 and the focusing lens 4 in sequence; the second blue light passes through the polarizing plate 123, the composite lens assembly, the spatially stacked lens 14, the dichroic plate 3 and the focusing lens 4 in sequence.

[0047] The first blue light emitter 111 emits the first blue light with a horizontal propagation direction outward, and the first blue light first passes through the vertical half-wave plate 121, at which time the half-wave plate 121 changes the polarization state of the first blue light, and then the first blue light is reflected on the blue light reflector 122. Since the blue light reflector 122 is tilted and forms a 45° angle with the top of the half-wave plate 121, the propagation direction of the first blue light is vertical and perpendicular to the light transmission axis of the polarizer 123. Therefore, when the first blue light is reflected by the reflector lens and reaches the polarizer 123, it no longer passes through the polarizer 123, but is reflected on the polarizer 123. The polarizer 123 and the blue light reflector 122 are parallel to each other, so after the first blue light is reflected by the polarizer 123, the propagation direction is horizontal.

[0048] The second blue light emitter 112 is located below the first blue light emitter 111. The second blue light emitter 112 emits a second blue light with a horizontal propagation direction outward. At this time, the propagation direction of the first blue light and the propagation direction of the second blue light are parallel to each other. The second blue light first passes through the polarizer 123. Since the light transmission axis of the polarizer 123 is in the horizontal direction, the second blue light passes through the polarizer 123 horizontally and overlaps with the first blue light.

[0049] The composite lens assembly comprises a slow axis adjustment lens group and a fast axis adjustment lens group, wherein the slow axis adjustment lens group is used to adjust the slow axis divergence angle of the second blue light, and the fast axis adjustment lens group is used to adjust the fast axis divergence angle of the second blue light.

[0050] The second blue light has two directions, a fast axis and a slow axis. The fast axis and the slow axis have different divergence angles. In general, the divergence angle in the slow axis direction is much larger than the divergence angle in the fast axis direction.

[0051] Therefore, this scheme adjusts the emission angles of the fast axis and the slow axis through the slow axis adjustment lens group and the fast axis adjustment lens group, wherein the slow axis adjustment lens group can adjust the slow axis divergence angle of the second blue light, and the fast axis adjustment lens group can adjust the fast axis divergence angle of the second blue light, thereby reducing the divergence angles in both the fast axis and the slow axis directions to within 1 mrad, significantly improving the light spot quality and the Rayleigh distance of the light beam.

[0052] The slow axis adjustment lens group includes a first plano-concave cylindrical mirror 131 and a first plano-convex cylindrical mirror 132 in sequence along the propagation path of the blue light, and the fast axis adjustment lens group includes a second plano-convex cylindrical mirror 134 and a second plano-concave cylindrical mirror 133 in sequence along the propagation path of the blue light, and the second plano-concave cylindrical mirror 133 and the second plano-convex cylindrical mirror 134 are both located between the first plano-concave cylindrical mirror 131 and the first plano-convex cylindrical mirror 132;

[0053] The first plano-concave cylindrical mirror 131, the second plano-convex cylindrical mirror 134, the second plano-concave cylindrical mirror 133 and the first plano-convex cylindrical mirror 132 are all arranged vertically, and the center of the second blue light emitter 112, the center of the first plano-concave cylindrical mirror 131, the center of the second plano-convex cylindrical mirror 134, the center of the second plano-concave cylindrical mirror 133 and the center of the first plano-convex cylindrical mirror 132 are all located on the same horizontal line.

[0054] The first plano-concave cylindrical mirror 131 and the second plano-convex cylindrical mirror 134 can adjust the slow-axis divergence angle of the second blue light, and the second plano-concave cylindrical mirror 133 and the second plano-convex cylindrical mirror 134 can adjust the fast-axis divergence angle of the second blue light.

[0055] The first plano-concave cylindrical mirror 131, the second plano-convex cylindrical mirror 134, the second plano-concave cylindrical mirror 133 and the first plano-convex cylindrical mirror 132 are sequentially arranged in the horizontal direction and the spacing therebetween is adjusted, so that the divergence angles of the slow axis and the fast axis can be precisely adjusted so that the second blue light overlaps with the first blue light, further improving the spot quality and the Rayleigh distance of the blue light engraving laser device of this scheme.

[0056] At least two blue light laser modules 1 are provided, and the polarized light combining lens groups 12 of two adjacent blue light laser modules 1 are symmetrically arranged along the horizontal axis.

[0057] It should be noted that the blue laser module 1 of the present solution may be provided with one or more. In another embodiment of the present solution, two vertically arranged blue laser modules 1 are provided, which can improve the intensity of the laser beam of the blue light engraving laser device of the present solution and achieve the effect of fast and precise processing of various materials.

[0058] Among them, the two polarized light-combining lens groups 12 are symmetrically arranged about the horizontal axis, which can accurately control the propagation direction of the blue light, ensuring that the blue light can pass through the polarized light-combining lens group 12, the composite lens assembly, the spatially stacked lens 14, the dichroic film 3 and the focusing lens 4 in sequence, and then gather together to achieve the effect of laser engraving.

[0059] The installation reference angle of the spatial stacked lens 14 is 45°, the center of the spatial stacked lens 14 and the center of the polarizer 123 are located on the same horizontal line, the spatial stacked lens 14 and the polarizer 123 are arranged vertically, and the spatial stacked lens 14 and the dichroic film 3 are arranged parallel to each other.

[0060] It is worth noting that each of the blue laser modules 1 is provided with an inclined spatial stacking lens 14 .

[0061] The spatial stacked lens 14 is vertically arranged with the polarizing film 123, and the center of the spatial stacked lens 14 is located on the same horizontal line as the center of the polarizing film 123, so the blue light passing through the composite lens assembly can be reflected on the spatial stacked lens 14, and the propagation direction is upward at this time, and passes through the dichroic film 3. The dichroic film 3 reflects the blue light, and the dichroic film 3 and the spatial stacked lens 14 are parallel to each other, so that the blue light is horizontally focused through the focusing lens 4 after being reflected by the dichroic film 3.

[0062] When the number of blue light laser modules 1 is greater than one, the spatial stacking lens 14 can reflect the blue light emitted by the corresponding blue light laser module 1, so that multiple blue lights are reflected on the dichroic film 3 together under the reflection effect of the corresponding spatial stacking lens 14, ensuring that the blue lights emitted by multiple blue light laser modules 1 can be gathered.

[0063] The red light laser emission source 20 is vertically installed below the composite lens assembly, the center of the red light reflector 22 and the center of the red light laser emission source 20 are located on the same vertical line, the center of the red light reflector 22 and the center of the dichromatic film 3 are located on the same horizontal line, and the red light reflector 22 and the dichromatic film 3 are arranged parallel to each other.

[0064] The red laser emission source 20 emits vertical red light upward, and the red light is reflected on the red light reflector 22. Since the red light reflector 22 is arranged in parallel with the dichroic plate 3, and the center of the red light reflector 22 and the center of the dichroic plate 3 are located on the same horizontal line, the red light is reflected on the red light reflector 22 and then focused horizontally through the focusing lens 4. At this time, the red light indicator light coincides with the focus of the blue laser. During the calibration process, the blue laser module 1 is turned off, and the red laser emission source 20 is started, and the red light can be used for focus calibration.

[0065] A horizontal collimating lens 21 is disposed at the output end of the red laser emission source 20 . The collimating lens 21 is used to collimate the red light. The red light passes through the collimating lens 21 , the red light reflecting plate 22 , the dichroic plate 3 and the focusing lens 4 in sequence.

[0066] Among them, a collimating lens 21 is also provided at the output end of the red light laser emission source 20, which collimates the red light emitted by the red light laser emission source 20, so that the red light is converted into a parallel light beam, which can provide a more accurate light spot for the correction result and improve the accuracy of the red light correction module 2.

[0067] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A blue light engraving laser device with a correction function, characterized in that: It includes a blue laser module, a red light correction module, a dichroic film and a focusing lens; The blue laser module includes a blue laser emission source group, a polarized light combining lens group, a composite lens assembly and a spatial stacking lens; the red light correction module includes a red laser emission source and a red light reflector; The blue laser emission source group is used to emit blue light, and the blue light passes through the polarized light combining lens group, the composite lens assembly, the spatial stacking lens, the dichroic mirror and the focusing lens in sequence; the red laser emission source is used to emit red light, and the red light passes through the red light reflecting sheet, the dichroic sheet and the focusing lens in sequence; The polarized light combining lens group is used for the polarization state of blue light, the composite lens assembly is used for adjusting the divergence angles of the fast axis and the slow axis in the blue light, the spatially stacked lens is used for reflecting the blue light to the dichroic film, the dichroic film is used for reflecting the blue light and transmitting the red light, and the focusing lens focuses the red light and the blue light.

2. The blue light engraving laser device with correction function according to claim 1, characterized in that: The blue laser emission source group includes, from top to bottom, a first horizontal blue light emitter and a second horizontal blue light emitter; The polarized light combining lens group includes a half-wave plate, a blue light reflecting plate and a polarizer. The center of the first blue light emitter, the center of the half-wave plate and the center of the blue light reflecting plate are all located on the same horizontal line. The half-wave plate is vertically installed at the output end of the first blue light emitter. The top of the half-wave plate forms an angle of 45° with the blue light reflecting plate. The center of the second blue light emitter and the center of the polarizer are located on the same horizontal line, the polarizer is obliquely installed at the output end of the first blue light reflector, the polarizer and the blue light reflector are arranged parallel to each other, and the light transmission axis of the polarizer is in the horizontal direction; The first blue light passes through a half-wave plate, a blue light reflecting plate, a composite lens assembly, a spatially stacked lens, a dichroic plate and a focusing lens in sequence; the second blue light passes through a polarizing plate, a composite lens assembly, a spatially stacked lens, a dichroic plate and a focusing lens in sequence.

3. The blue light engraving laser device with correction function according to claim 1, characterized in that: The composite lens assembly comprises a slow axis adjustment lens group and a fast axis adjustment lens group, wherein the slow axis adjustment lens group is used to adjust the slow axis divergence angle of the second blue light, and the fast axis adjustment lens group is used to adjust the fast axis divergence angle of the second blue light.

4. The blue light engraving laser device with correction function according to claim 3, characterized in that: The slow axis adjustment lens group includes a first plano-concave cylindrical mirror and a first plano-convex cylindrical mirror in sequence along the propagation path of the blue light, and the fast axis adjustment lens group includes a second plano-convex cylindrical mirror and a second plano-concave cylindrical mirror in sequence along the propagation path of the blue light, and the second plano-concave cylindrical mirror and the second plano-convex cylindrical mirror are both located between the first plano-concave cylindrical mirror and the first plano-convex cylindrical mirror; The first plano-concave cylindrical mirror, the second plano-convex cylindrical mirror, the second plano-concave cylindrical mirror and the first plano-convex cylindrical mirror are all arranged vertically, and the center of the second blue light emitter, the center of the first plano-concave cylindrical mirror, the center of the second plano-convex cylindrical mirror, the center of the second plano-concave cylindrical mirror and the center of the first plano-convex cylindrical mirror are all located on the same horizontal line.

5. The blue light engraving laser device with correction function according to claim 1, characterized in that: There are at least two blue light laser modules, and the polarized light combining lens groups of two adjacent blue light laser modules are symmetrically arranged along the horizontal axis.

6. The blue light engraving laser device with correction function according to claim 2, characterized in that: The installation reference angle of the spatial stacked lens is 45°, the center of the spatial stacked lens and the center of the polarizer are located on the same horizontal line, the spatial stacked lens and the polarizer are arranged vertically, and the spatial stacked lens and the dichroic film are arranged parallel to each other.

7. The blue light engraving laser device with correction function according to claim 1, characterized in that: The red light laser emission source is vertically installed below the composite lens assembly, the center of the red light reflection sheet and the center of the red light laser emission source are located on the same vertical line, the center of the red light reflection sheet and the center of the dichromatic sheet are located on the same horizontal line, and the red light reflection sheet and the dichromatic sheet are arranged parallel to each other.

8. The blue light engraving laser device with correction function according to claim 7, characterized in that: A horizontal collimating lens is provided at the output end of the red laser emission source. The collimating lens is used to collimate the red light. The red light passes through the collimating lens, the red light reflecting plate, the dichroic plate and the focusing lens in sequence.

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