A blue light source device

Abstract

The utility model relates to a kind of blue light source devices, including blue laser, fast axis lens group, turning prism, step mirror, slow axis beam expander lens group and focusing mirror in order along laser path, the blue laser generates multiple parallel laser, the multiple parallel laser is compressed after entering the turning prism by fast axis lens group, the turning prism has multiple step reflection light exit surface, each the parallel laser passes through a step reflection light exit surface, and adjacent parallel laser forms X-axis spacing and Y-axis spacing, the step mirror has multiple step reflection surface, the step reflection surface eliminates one spacing of the parallel laser, so that the parallel laser only with another spacing is reflected to the slow axis beam expander lens group by the step reflection surface vertically, and the beam divergence angle is reduced by the slow axis beam expander lens group, and then focused by the focusing mirror.

Description

Technical Field

[0001] This utility model relates to the field of laser engraving technology, and in particular to a blue light source device. Background Technology

[0002] Existing low-power blue laser engraving machine light source modules mainly consist of multiple TO-packaged blue lasers or multiple COS (Cyclic Optical Array) lasers, which are then polarized and spatially combined to achieve power superposition. The blue lasers and beam-shaping lens assemblies are quite complex, resulting in high costs, low market competitiveness, and significant installation and debugging difficulties. Summary of the Invention

[0003] In view of the above situation, it is necessary to propose a compact blue light source device.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a blue light source device, comprising, in sequence along the laser path, a blue laser, a fast-axis lens group, a concave prism, a stepped reflector, a slow-axis beam expander lens group, and a focusing lens. The blue laser generates multiple parallel laser beams. After the multiple parallel laser beams are compressed by the fast-axis lens group, they enter the concave prism. The concave prism has multiple stepped reflective surfaces. Each parallel laser beam passes through one of the stepped reflective surfaces, creating an X-axis spacing and a Y-axis spacing between adjacent parallel laser beams. The stepped reflector has multiple stepped reflective surfaces. The stepped reflective surfaces eliminate one of the spacings of the parallel laser beams, allowing the parallel laser beam with only the other spacing to be perpendicularly reflected by the stepped reflective surfaces to the slow-axis beam expander lens group. The slow-axis beam expander lens group reduces the beam divergence angle, and the beam is then focused by the focusing lens.

[0005] Furthermore, the blue laser is formed by integrally packaging multiple laser chips.

[0006] Furthermore, the fast-axis lens group includes a fast-axis collimating lens and a plano-concave cylindrical lens sequentially along the laser path. The fast-axis collimating lens has a convex surface on one side facing the blue laser and a flat surface on the other side. The plano-concave cylindrical lens has a flat surface on one side facing the plano-concave cylindrical lens and a concave surface on the other side.

[0007] Furthermore, the slow-axis beam expander lens group includes a biconcave cylindrical lens and a plano-convex cylindrical lens sequentially along the laser path. Both sides of the biconcave cylindrical lens are concave, and the transparent side of the plano-convex cylindrical lens has a flat surface on one side and a convex surface on the other side.

[0008] Furthermore, a protective glass is provided below the focusing lens.

[0009] Furthermore, the turning prism includes an incident light reflecting surface and a stepped light reflecting surface. The stepped light reflecting surface has multiple light reflecting surfaces, which are spaced apart along a direction perpendicular to the light reflecting surface of the parallel laser to form a stepped shape.

[0010] Furthermore, the parallel laser emitted by the blue laser is four beams, the turning prism has four stepped reflective surfaces, and the stepped reflector has four stepped reflective surfaces.

[0011] Furthermore, the blue laser emits parallel laser light along the Z-axis, the parallel laser light rays are parallel to each other along the Y-axis, the stepped reflector surfaces are arranged in a continuous stepped manner along the X-axis and Y-axis and form a Y-axis spacing in the Y-axis direction, and the stepped reflector reflects the parallel laser light in the Y-axis direction.

[0012] The beneficial effects of this invention are as follows: Parallel laser light emitted from a blue laser is collimated by a fast-axis lens group, compressing the beam spot size; then it enters a deflecting prism, where internal reflection creates a certain distance between the beam in both the horizontal and vertical directions, forming X-axis and Y-axis spacing; the beam leaving the deflecting prism enters a stepped reflector, where reflection eliminates one spacing while retaining the other; then it passes through a slow-axis beam expander to reduce the divergence angle; finally, it enters a focusing lens for focusing. The overall structure has fewer optical components, is more compact, and reduces installation and debugging difficulty. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a blue light source device according to an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the laser path of a blue light source device according to an embodiment of this utility model;

[0015] Figure 3 This is a schematic diagram of the laser path in another direction of a blue light source device according to an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the laser path from the stepped reflector to the focusing lens of a blue light source device according to an embodiment of this utility model;

[0017] Figure 5 This is a schematic diagram of the laser path from the blue laser to the stepped reflector in a blue light source device according to an embodiment of this utility model.

[0018] Label Explanation:

[0019] 100. Blue laser; 110. Parallel laser; 111. Horizontal difference; 112. Height difference;

[0020] 200. Fast-axis lens group; 210. Fast-axis collimating lens; 220. Plano-concave cylindrical lens;

[0021] 300. Conversion prism; 310. Incident light reflecting surface; 320. Stepped light emitting surface;

[0022] 321. Stepped reflector surface; 400. Stepped mirror; 410. Stepped reflector surface;

[0023] 500, Slow-axis beam expander lens group; 510, Biconcave cylindrical lens; 520, Plano-convex cylindrical lens;

[0024] 600, focusing lens; 700, protective glass. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a blue light source device of this utility model is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0026] Please refer to Figures 1-5 A blue light source device, comprising, along a laser path, a blue laser 100, a fast-axis lens group 200, a concentric prism 300, a stepped reflector 400, a slow-axis beam expander lens group 500, and a focusing lens 600. The blue laser 100 generates multiple parallel laser beams 110. These beams are compressed by the fast-axis lens group 200 before entering the concentric prism 300. The concentric prism 300 has multiple stepped reflective surfaces 321. Each parallel laser beam 110... The stepped reflector 321 creates an X-axis and Y-axis spacing between adjacent parallel lasers 110. The stepped reflector 400 has multiple stepped reflective surfaces 410. The stepped reflective surface 410 eliminates one of the spacings of the parallel lasers 110, so that the parallel lasers 110 with only the other spacing are reflected perpendicularly through the stepped reflective surface 410 to the slow-axis beam expander lens group 500. The slow-axis beam expander lens group 500 reduces the beam divergence angle, and then the beam is focused by the focusing lens 600.

[0027] The parallel laser 110 emitted from the blue laser 100 is collimated by the fast-axis lens group 200, compressing the spot size in the Y-axis direction. It then enters the deflection prism 300, where internal reflection creates a certain distance between the beam in both the horizontal and vertical directions, forming X-axis and Y-axis spacing. The beam leaving the deflection prism 300 enters the stepped reflector 400, where reflection eliminates one spacing while retaining the other. It then passes through the slow-axis beam expander lens group 500 to reduce the divergence angle, and finally enters the focusing lens 600 for focusing. The overall structure has fewer optical components and is more compact, reducing installation and debugging difficulty.

[0028] Preferably, the blue laser 100 is formed by integrally packaging multiple laser chips. Compared with traditional multiple TO packages or multiple COS packages, the integrally packaged blue laser 100 is easier to install and debug, and has fewer components.

[0029] Please refer to Figures 1-3 and Figure 5 The fast-axis lens group 200 includes a fast-axis collimating lens 210 and a plano-concave cylindrical lens 220 along the laser path. The fast-axis collimating lens 210 has a convex surface facing the blue laser 100 and a flat surface facing the blue laser 100. The plano-concave cylindrical lens 220 has a flat surface facing the plano-concave cylindrical lens 220 and a concave surface facing the plano-concave cylindrical lens 220.

[0030] Please refer to Figure 1 , Figure 2 and Figure 4 The slow-axis beam expander lens group 500 includes a biconcave cylindrical lens 510 and a plano-convex cylindrical lens 520 along the laser path. Both sides of the biconcave cylindrical lens 510 are concave, and the plano-convex cylindrical transparent surface facing the biconcave cylindrical lens 510 is flat and the other side is convex.

[0031] Please refer to Figures 1-2 and Figure 4 A protective glass 700 is also provided below the focusing lens 600.

[0032] Please refer to Figure 2 and Figure 5 The turning prism 300 includes an incident light reflecting surface 310 and a stepped light reflecting surface 321. The stepped light reflecting surface 321 has multiple light reflecting surfaces, which are spaced apart along a direction perpendicular to the light reflecting surface of the parallel laser 110 to form a stepped shape.

[0033] Preferably, the blue laser 100 emits four parallel laser beams, the turning prism 300 has four stepped reflective surfaces 321, and the stepped reflector 400 has four stepped reflective surfaces 410.

[0034] Please refer to Figures 2-5Blue laser 100 emits parallel laser along the Z-axis, and the parallel lasers are parallel to each other along the Y-axis. The stepped reflector 321 is set in a continuous stepped manner along the X-axis and Y-axis and forms a Y-axis spacing in the Y-axis direction. The stepped reflector 400 reflects the parallel laser in the Y-axis direction.

[0035] Understandably, the laser initially propagates along the Z-axis and eventually along the Y-axis. The blue laser 100 emits multiple parallel laser beams 110 at intervals along the Y-axis, with spacings of Δy1, Δy2, Δy3… between adjacent parallel laser beams 110. A deflecting prism 300 generates spacings ΔX1, ΔX2, ΔX3… along the X-axis, and a stepped reflector 400 generates spacings ΔY1, ΔY2, ΔY3… along the Y-axis. Δy1 and ΔY2 are in opposite directions, thus canceling each other out; Δy2 and ΔY2 cancel each other out; Δy3 and ΔY3 cancel each other out… thus retaining only the spacings ΔX1, ΔX2, ΔX3… along the X-axis. Typically, the X-axis is the horizontal direction, the Y-axis is the vertical direction, and the Z-axis is the initial direction of light propagation. It is understandable that Δy1, Δy2, Δy3... can be equal, that is, all are Δy; ΔX1, ΔX2, ΔX3... can be equal, that is, all are ΔX; ΔY1, ΔY2, ΔY3... can be equal, that is, all are ΔY.

[0036] That is, the height difference 112 of the stepped reflecting surface 410 of the stepped reflector 400 is equal to the spacing of the corresponding parallel laser 110 emitted from the blue laser machine. Thus, the two cancel each other out, leaving only the spacing generated by the deflecting prism 300.

[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0039] In summary, the blue light source device provided by this utility model involves collimating a parallel laser emitted from a blue laser through a fast-axis lens group, compressing the spot size in the Y-axis direction; then entering a deflecting prism, where internal reflection creates a certain distance between the beam in both the horizontal and vertical directions, forming X-axis and Y-axis spacing; the beam leaving the deflecting prism enters a stepped reflector, where reflection eliminates one spacing while retaining the other; then, the beam passes through a slow-axis beam expander group to reduce the divergence angle; finally, it enters a focusing lens for focusing. The overall structure has fewer optical components, is compact, and reduces installation and debugging difficulty.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A blue light source device, characterized in that, The laser path sequentially includes a blue laser, a fast-axis lens group, a concave prism, a stepped reflector, a slow-axis beam expander, and a focusing lens. The blue laser generates multiple parallel laser beams. These beams are compressed by the fast-axis lens group before entering the concave prism. The concave prism has multiple stepped reflective surfaces. Each parallel laser beam passes through one of these stepped reflective surfaces, creating X-axis and Y-axis spacing between adjacent parallel laser beams. The stepped reflector has multiple stepped reflective surfaces. These surfaces eliminate one of the spacings of the parallel laser beams, allowing the remaining parallel laser beam with only one spacing to be perpendicularly reflected by the stepped reflector to the slow-axis beam expander. The slow-axis beam expander reduces the beam divergence angle, and the beam is then focused by the focusing lens.

2. The blue light source device according to claim 1, characterized in that, The blue laser is formed by the integral packaging of multiple laser chips.

3. The blue light source device according to claim 1, characterized in that, The fast-axis lens group includes a fast-axis collimating lens and a plano-concave cylindrical lens along the laser path. The fast-axis collimating lens has a convex surface on one side facing the blue laser and a flat surface on the other side. The plano-concave cylindrical lens has a flat surface on one side facing the plano-concave cylindrical lens and a concave surface on the other side.

4. A blue light source device according to claim 1, characterized in that, The slow-axis beam expander lens group includes a biconcave cylindrical lens and a plano-convex cylindrical lens in sequence along the laser path. Both sides of the biconcave cylindrical lens are concave, and the transparent side of the plano-convex cylindrical lens is flat on one side and convex on the other side.

5. A blue light source device according to claim 1, characterized in that, A protective glass is also provided below the focusing lens.

6. A blue light source device according to claim 1, characterized in that, The turning prism includes an incident light reflecting surface and a stepped light reflecting surface. The stepped light reflecting surface has multiple light reflecting surfaces, which are spaced apart along a direction perpendicular to the light reflecting surface of the parallel laser to form a stepped shape.

7. A blue light source device according to claim 1, characterized in that, The blue laser emits four parallel laser beams, the turning prism has four stepped reflective surfaces, and the stepped reflector has four stepped reflective surfaces.

8. A blue light source device according to claim 1, characterized in that, The blue laser emits parallel laser light along the Z-axis. The parallel laser light rays are parallel to each other along the Y-axis. The stepped reflector surfaces are arranged in a continuous stepped manner along the X-axis and Y-axis and form a Y-axis spacing in the Y-axis direction. The stepped reflector reflects the parallel laser light rays in the Y-axis direction.

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