A combined laser light source

Abstract

The present invention discloses a combined laser light source, which relates to the field of optical technology. The present invention specifically includes a housing, a three-primary-color laser and an aperture mirror. The three-primary-color laser and the aperture mirror are respectively fixed in the housing. The three-primary-color laser is used to generate a red laser beam, a green laser beam and a blue laser beam. The light-emitting ends of the red laser, the green laser and the blue laser are respectively provided with aperture mirrors. The reflection of the aperture mirrors makes the laser beams overlap. The overlap of the laser beams is used to form beams of different colors. The housing is provided with a light outlet, and the light beams reflected by the aperture mirror are transmitted from the light outlet. The present invention uses three-primary-color lasers to form three laser beams, and these three laser beams can form laser beams of other colors, which can meet the requirements of stage lights for various color beams. In addition, the scattering angle of the laser beam is small and not easy to diverge, and a clear and distinct light spot can be formed in the far field, which can be applied to venues of various sizes.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular provides a combined laser light source. Background Art

[0002] Stage lights, effect lights, and other lighting fixtures can be used to emit light of varying colors, creating dazzling lighting effects. Currently, these fixtures primarily use LEDs or halogen lamps as their light sources, equipped with various light guides. These light guides create beams of varying colors or shapes. For example, passing light through a diamond prism can create a rainbow of colors.

[0003] However, the light beam formed by the LED lamp or halogen lamp and the light guide assembly has a large divergence angle. When the venue area is large, it is difficult to form a light spot in the far field, resulting in poor stage effects. Summary of the Invention

[0004] The present invention provides a combined laser light source for solving the problem that the light beam formed by the current LED lamp or halogen lamp and the light guide assembly has a large divergence angle, is difficult to form a light spot in the far field when the venue area is large, and leads to poor stage effects.

[0005] The technical solutions of the present invention are as follows:

[0006] A combined laser light source includes a housing, a three-primary-color laser, and an aperture mirror. The three-primary-color laser and the aperture mirror are respectively fixed in the housing. The three-primary-color lasers include a red laser, a green laser, and a blue laser. The red laser generates a red laser beam, the green laser mirror generates a green laser beam, and the blue laser mirror generates a blue laser beam. The laser beams are located in the same plane and are parallel to each other. The light-emitting ends of the red laser, the green laser, and the blue laser are respectively provided with aperture mirrors. The laser beams are overlapped by reflection from the aperture mirrors. The overlap of the laser beams is used to form beams of different colors. The housing is provided with a light outlet, and the light beams reflected by the aperture mirror are transmitted from the light outlet.

[0007] In this solution, three primary color lasers are used to generate laser beams to create lighting effects. These three primary color lasers can generate red, green, and blue laser beams, respectively. These three colors are combined and superimposed to form laser beams of various colors, meeting the requirements of stage effects for various color laser beams. The laser beams have a narrow divergence angle, so even in large venues, the laser beams can form a clear light spot in the far field, ensuring the stage effect.

[0008] Preferably, laser beam expander mirror groups are respectively provided between the three primary color lasers and the aperture mirror.

[0009] In this solution, the laser beam expansion lens group can expand the diameter of the laser beam so that the diameter of the laser beam meets the use requirements; it can also narrow the scattering angle of the laser beam and reduce the scattering loss of the laser beam.

[0010] In order to allow the three colors of laser beams to overlap to form laser beams of other colors, the red laser is arranged on the side close to the light outlet, the blue laser is located on the side away from the light outlet, and the green laser is located between the red laser and the blue laser. The aperture mirror is a beam splitter plate, and each beam splitter plate is used to reflect the laser beam to the light outlet.

[0011] In this solution, the red laser beam has the longest wavelength, while the blue laser beam has the shortest wavelength. Therefore, a spectroscopic plate can be used to converge laser beams of different wavelengths. For example, the spectroscopic plate corresponding to the red laser beam has a longer reflection wavelength, allowing the green and blue laser beams to pass through. Therefore, when the red laser beam strikes the spectroscopic plate, it is emitted toward the light outlet. However, when the blue and green laser beams strike the spectroscopic plate, they pass through it, causing the blue and green laser beams to overlap with the red laser beam. Similarly, the spectroscopic plate corresponding to the green laser beam has a shorter reflection wavelength than the spectroscopic plate corresponding to the red laser beam. In this case, when the green laser beam strikes the spectroscopic plate, the green laser beam is reflected toward the light outlet. However, when the blue laser beam strikes the spectroscopic plate, the blue laser beam is projected, causing the blue and green laser beams to overlap. Since the spectroscopic plate corresponding to the blue laser beam has the shortest reflection wavelength, the blue laser beam is reflected toward the light outlet.

[0012] The reason why domestic technology has not made a breakthrough is that high-quality red lasers are more expensive to produce red laser beams of the same power compared to green lasers or blue lasers of the same quality. When using low-cost red lasers to produce red laser beams, the red laser beam will have a large divergence angle when passing through the laser beam expander group, which will result in large energy loss of the red laser beam. In the case of insufficient energy, the red laser beam cannot be combined with the green laser beam or the blue laser beam to form laser beams of other colors. Therefore, to solve the problem of high cost of red lasers, multiple red lasers are included, and the red laser beams generated by each red laser are parallel.

[0013] In this solution, by increasing the number of red lasers, more red laser beams are generated. By combining the red laser beams, the power of the red laser beam can be enhanced. At this point, although the red laser power generated by a single red laser is low and energy loss is large during use, the remaining energy of the red laser beam is still sufficient to match the green and blue laser beams. Therefore, by increasing the number of red laser beams to increase the red laser beam energy, low-cost red lasers can be used in combination to form a red laser beam that meets the requirements, achieving the effect of reducing costs. This also allows the red laser beam to stably combine with the green and blue laser beams to form laser beams of various colors despite diffusion losses.

[0014] If multiple red lasers are used, configuring an aperture mirror for each red laser will result in the green and blue laser beams passing through a greater number of aperture mirrors, leading to increased loss of the green and blue laser beams. To address this, a secondary reflector assembly is provided at the light-emitting end of each red laser, each of which is used to reflect the red laser beam onto a reflector.

[0015] In this solution, there is no need to set an aperture mirror for each red laser. The secondary reflection component is used to transmit each red laser beam to the same aperture mirror. Therefore, the number of aperture mirrors that the green laser beam and the blue laser beam pass through will not increase, which can solve the problem of increased loss of the green laser beam and the blue laser beam due to the increase in the number of red lasers.

[0016] Preferably, each of the secondary reflection components includes a reflector and a beam splitter, and each reflector reflects each red laser beam to the beam splitter respectively. The laser beams are merged into one red laser beam by the beam splitter and then reflected to the aperture mirror.

[0017] In this solution, each reflector reflects each red laser beam to the beam splitter, which can merge each red laser beam into one red laser beam and then reflect the merged red laser beam to the aperture mirror.

[0018] When reflecting the individual red laser beams to the beam splitter, if they completely overlap, they must pass through multiple reflectors, resulting in significant loss of the red laser beams. The reflectors also require semi-transparent, semi-reflective lenses to allow the red laser beams to pass through them, resulting in high reflector costs. To this end, the edges of the red laser beams reflected by the reflectors overlap, and they merge at the beam splitter into a larger diameter red laser beam.

[0019] In this scheme, the edges of the red laser beams overlap before being combined at the beam splitter into a single, larger-diameter red laser beam. Therefore, after being reflected by the reflector, the red laser beams only overlap at their edges. At this point, each red laser beam only needs to reflect once from the reflector and does not need to pass through other reflectors, reducing red laser beam loss.

[0020] Preferably, the laser beam expander lens assembly between the red laser and the aperture mirror includes a plano-concave cylindrical lens and two plano-convex cylindrical lenses, and the convex axes of the two plano-convex cylindrical lenses are perpendicular to each other.

[0021] In this solution, a plano-concave cylindrical lens and a plano-convex cylindrical lens are used to shape the red laser beam, forming a red laser beam with a rectangular cross-section. After the rectangular red laser beam is reflected by a reflector, the edges of the red laser beams can be smoothly aligned, resulting in a more uniform energy distribution across the cross-section of the red laser beam.

[0022] In order to solve the problem that the scattering angles of the three colors of laser beams are different, resulting in poor effect of the combined laser beams of other colors, each of the laser beam expander groups is used to enlarge the diameter of the laser beam and reduce the diffusion angle of the laser beam. The laser beam diameters enlarged by the laser beam expander groups corresponding to the three primary color lasers are different.

[0023] In this solution, when a laser beam expander group is used to expand the diameters of the three colors of laser beams, the diameters of the laser beams are made different, so that even if the three colors of laser beams are scattered, they can be stably combined to form laser beams of other colors.

[0024] Preferably, after each laser beam is amplified by the laser beam expander assembly, the diameter of the red laser beam is larger than the diameter of the blue laser beam, and the diameter of the blue laser beam is larger than the diameter of the green laser beam.

[0025] Beneficial effects of the present invention:

[0026] The present invention uses three primary color lasers to generate three laser beams, which can then be used to generate laser beams of other colors, meeting the requirements of stage lighting for various color beams. Furthermore, the laser beam has a small scattering angle and is not easily diverged, forming a clear and distinct light spot in the far field, making it suitable for venues of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is an internal top view of the present invention;

[0029] Figure 2 Schematic diagram of the laser beam expanding its diameter after passing through the laser beam expander group;

[0030] Figure 3 Schematic diagram of the red laser beam expanding its diameter after passing through the laser beam expander group;

[0031] Figure 4 Schematic diagram of the red laser beam reflected along the laser beam expander lens group and the secondary reflection component.

[0032] In the above drawings, the corresponding reference numerals are as follows:

[0033] 1. Housing; 2. Light outlet; 3. Aperture mirror; 4. Reflector; 5. Laser beam expander; 6. Blue laser; 7. Green laser; 8. Red laser; 9. Beam splitter; 51. Plano-concave cylindrical lens; 52. Plano-convex cylindrical lens. DETAILED DESCRIPTION

[0034] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely explained through the specific implementation methods of the embodiments of the present invention.

[0035] Example 1:

[0036] like Figure 1 As shown, this embodiment 1 provides a combined laser light source, including a housing 1, a three-primary-color laser, and an aperture mirror 3. The three-primary-color laser is used to generate laser beams of the three primary colors of red, green, and blue, and the aperture mirror 3 is used to reflect the laser beams and make them converge and overlap. The three-primary-color laser includes a red laser 8, a green laser 7, and a blue laser 6. When only the red laser 8 is operating, a red laser beam is generated. Similarly, when only the green laser 7 or the blue laser 6 is operating, a green laser beam or a blue laser beam is generated, respectively. When two or three color lasers are operating simultaneously, the laser beams of different colors will converge and overlap when reflected by the aperture mirror 3, thereby forming laser beams of other colors. The housing 1 is provided with a light outlet 2, and the aperture mirror 3 is used to reflect the laser beam to the light outlet 2 so that the laser beam is irradiated from the light outlet 2 to the outside of the housing 1. Taking advantage of the small scattering angle of the laser beam, the light beam emitted from the light outlet 2 of this embodiment 1 can form a clear light spot in the far field, making it suitable for large venues.

[0037] Compared to the light source of traditional stage lights, the structural advantage of this embodiment 1 is that it does not require a movable light guide component to control the color of the light beam. It only needs to control the operation of the three primary color lasers separately to form light beams of various colors. For example, when a red beam is required, the red laser 8 is turned on, and the green laser 7 and blue laser 6 are turned off. At this time, only the red laser beam is emitted from the light outlet 2; when yellow is required, the red laser 8 and green laser 7 are turned on, and the blue laser 6 is turned off. The red laser beam and the green laser beam will overlap under the reflection of the aperture mirror 3 to form a yellow laser beam. Therefore, a controller can be configured for each of the three primary color lasers. The operation of each of the three primary color lasers can be controlled by the controller, so that the three primary color lasers can be turned on and off according to the program, thereby producing the desired lighting effect. The controller can be a single-chip microcomputer or a PLC.

[0038] It should be noted that, in the first embodiment, three primary color lasers are provided in the housing 1 , which means that at least one red laser 8 , green laser 7 and blue laser 6 are provided.

[0039] Aperture mirror 3 uses a spectroscopic plate, with different spectroscopic plates corresponding to different colored laser beams. The spectroscopic plate corresponding to the red laser beam has a larger reflection wavelength, allowing the green and blue laser beams to pass through but not the red laser beam. Therefore, when the red laser beam strikes this spectroscopic plate, it is emitted toward light outlet 2. However, when the blue and green laser beams strike this spectroscopic plate, they are transmitted through, causing the blue and green laser beams to overlap with the red laser beam. The spectroscopic plate corresponding to the green laser beam has a smaller reflection wavelength than the spectroscopic plate corresponding to the red laser beam, allowing the blue laser beam to pass through but not the green laser beam. Therefore, when the green laser beam strikes this spectroscopic plate, the green laser beam is reflected toward light outlet 2, while when the blue laser beam strikes this spectroscopic plate, the blue laser beam is transmitted through, causing the blue and green laser beams to overlap. The spectroscopic plate corresponding to the blue laser beam has the smallest reflection wavelength, so when the blue laser beam strikes this spectroscopic plate, it is reflected toward light outlet 2.

[0040] like Figure 2 As shown, Figure 2The shaded area in the middle represents the laser beam. The three-primary-color laser is small in size, and the diameter of the laser beam it produces is small, while the beam diameter required for stage lights is larger. Therefore, a laser beam expander group 5 is provided between the three-primary-color laser and the aperture mirror 3, and the laser beam diameter is increased by the laser beam expander group 5. The laser beam expander group 5 includes a plano-convex lens and a plano-concave lens. The laser beam first passes through the plano-concave lens, which amplifies the beam diameter. At this time, the beam diffuses into a conical divergent beam. The divergent beam then passes through the plano-convex lens and becomes a cylindrical laser beam again after passing through the plano-convex lens. The diameter of the laser beam is also amplified by the plano-concave lens and the plano-convex lens. Moreover, the divergence angle of the laser beam can be controlled by the plano-convex lens, thereby reducing the divergence angle of the laser beam and the energy loss of the laser beam.

[0041] like Figure 3 As shown, Figure 3 The middle shadow represents the red laser beam. Because the red laser beam has a large divergence angle when passing through the plano-concave lens, only a portion of the divergent beam can impinge on the plano-convex lens. The remaining red laser beam that does not impinge on the plano-convex lens is lost. Therefore, the red laser energy is significantly lost after passing through the laser beam expander assembly 5. This is especially true when the red laser 8 is of poor quality. This produces a red laser beam with a larger divergence angle. When passing through the laser beam expander assembly 5, a larger portion of the red laser beam will not impinge on the plano-convex lens, resulting in greater energy loss. Currently, domestically produced green lasers 7 and blue lasers 6 are of high quality on the market, while domestically produced red lasers 8 are of poor quality. Therefore, using a laser of the same quality to generate laser light would significantly increase the cost of the red laser 8. To address this issue, three domestically produced red lasers 8 are provided within the housing 1. These red lasers 8 produce red laser beams with a larger divergence angle and excellent quality. The light-emitting end of each red laser 8 is respectively provided with a laser beam expander group 5. The red laser beams generated by the three red lasers 8 are processed by the three laser beam expander groups 5 respectively, and then the three red laser beams are combined and merged into a complete red laser beam by a secondary reflection component provided in the housing 1. The secondary reflection component then reflects the combined red laser beam to the aperture mirror 3, and then the aperture mirror reflects it to the light outlet 2. The red laser beams generated by the three red lasers 8 will have obvious energy loss after being processed by the laser beam expander group 5. However, after the three red laser beams are combined and merged by the secondary reflection component, the energy of the three red laser beams is concentrated and aggregated, so that the energy of the combined red laser beam is equivalent to the energy of the green laser beam or the blue laser beam, and can stably form laser beams of other colors with the green laser beam or the blue laser beam. This arrangement allows the use of domestically produced red lasers 8 of lower quality, thereby achieving the purpose of reducing costs.

[0042] like Figure 4 As shown, Figure 4 The middle shadow represents the red laser beam. The secondary reflective assembly includes three reflectors and a beam splitter 9. The three red laser beams are respectively irradiated onto the three reflectors, which reflect the red laser beams onto the beam splitter 9. The beam splitter 9 can combine the three red laser beams into a single red laser beam, which is then irradiated onto the aperture mirror 3.

[0043] It should be noted that the three reflectors can be ordinary reflectors or beam splitters. If a beam splitter is used, it should be semi-transparent and semi-reflective. This beam splitter can reflect half of the red laser beam to the beam splitter 9, while the other half is transmitted through the beam splitter. This arrangement has the advantage of being installed along the same straight line, making it easier to install. However, it results in significant energy loss in the red laser beam and is not recommended.

[0044] Therefore, the three reflectors are preferably ordinary reflectors. The three reflectors are installed along a straight line that is inclined relative to the red laser beam generated by the red laser 8. In addition, the adjacent edges of the three reflectors are aligned so that the edges of the red laser beams reflected by the three reflectors overlap. When the three red laser beams are irradiated by the beam splitter 9, the beam splitter 9 can reflect a complete red laser beam.

[0045] Similarly, the number of red lasers 8 can also be two, four, five or more, and the number of blue lasers 6 and green lasers 7 can also be two, three, four or more.

[0046] In order to make the energy distribution of the red laser beam reflected by the beam splitter 9 more uniform, the mirror shape of the three reflectors is set to a rectangle. The rectangular reflector reflects a red laser beam with a rectangular cross-section. The edge of the red laser beam is straight and can perfectly coincide with the edge of the adjacent red laser beam. In this case, the overlap between the red laser beams reflected by the reflectors is very small, so the energy distribution of the red laser beam on the beam splitter 9 is more uniform, so that the beam splitter 9 reflects a red laser beam with uniform energy.

[0047] In order to make the edges of the red laser beams reflected by the reflector overlap, the entire mirror surface of the reflector needs to be within the irradiation range of the red laser beam. In this case, the laser beam expander lens group 5 corresponding to the red laser 8 can use a plano-concave cylindrical lens 51 and two plano-convex cylindrical lenses 52, the convex surfaces of the two plano-convex cylindrical lenses 52 being cylindrical, and the convex axes of the two plano-convex cylindrical lenses 52 being perpendicular to each other. The cross-section of the red laser beam processed by the laser beam expander lens group 5 is rectangular, so that the red laser beam passing through the laser beam expander lens group 5 can be completely irradiated onto the reflector, and at the same time, the mirror surface of the reflector is completely within the irradiation range of the red laser beam. At this time, the red laser beam can be completely reflected by the reflector, preventing the red laser beam from irradiating areas outside the reflector, thereby ensuring that the red laser beam will not be lost due to irradiation outside the reflector.

Claims

1. A combined laser light source, characterized in that: The invention comprises a housing (1), a three-primary-color laser and an aperture mirror (3), wherein the three-primary-color laser and the aperture mirror (3) are respectively fixed in the housing (1), wherein the three-primary-color laser comprises a red laser (8), a green laser (7) and a blue laser (6), wherein the red laser (8) generates a red laser beam, the green laser mirror generates a green laser beam, and the blue laser mirror generates a blue laser beam, wherein the laser beams are located in the same plane and are parallel to each other, wherein the light-emitting ends of the red laser (8), the green laser (7) and the blue laser (6) are respectively provided with aperture mirrors (3), wherein the laser beams are overlapped by reflection of the aperture mirrors (3), and the overlap of the laser beams is used to form beams of different colors, wherein the housing (1) is provided with a light outlet (2), which is reflected by the aperture mirrors (3) and the light-emitting ends of the red laser (8), the green laser (7) and the blue laser (6) are respectively provided with aperture mirrors (3). The emitted light beams are transmitted from the light outlet (2); a laser beam expander group (5) is respectively arranged between the three primary color lasers and the aperture mirror (3), comprising a plurality of red lasers (8); the red laser beams generated by each red laser (8) are parallel; a secondary reflection component is respectively arranged at the light emitting end of each red laser (8); each secondary reflection component is used to reflect the red laser beam to the aperture mirror (3); each secondary reflection component comprises a reflector and a beam splitter (9); each reflector respectively reflects each red laser beam to the beam splitter (9); the laser beams are merged into a red laser beam by the beam splitter (9) and then reflected to the aperture mirror (3); the edges of the red laser beams reflected by each reflector overlap, and are merged into a red laser beam with a larger diameter at the beam splitter (9).

2. The combined laser light source according to claim 1, characterized in that: The red laser (8) is arranged on a side close to the light outlet (2), the blue laser (6) is located on a side away from the light outlet (2), the green laser (7) is located between the red laser (8) and the blue laser (6), and the aperture mirror (3) is a beam splitter plate, each beam splitter plate is used to reflect the laser beam to the light outlet (2).

3. The combined laser light source according to claim 1, characterized in that: The laser beam expanding lens group (5) between the red laser (8) and the aperture mirror (3) comprises a plano-concave cylindrical lens (51) and two plano-convex cylindrical lenses (52), wherein the convex axes of the two plano-convex cylindrical lenses (52) are perpendicular to each other.

4. The combined laser light source according to claim 1, characterized in that: Each laser beam expanding lens group (5) is used to enlarge the diameter of the laser beam and reduce the diffusion angle of the laser beam. The laser beam diameters enlarged by the laser beam expanding lens groups (5) corresponding to the three primary color lasers are different.

5. The combined laser light source according to claim 4, characterized in that: After each laser beam is amplified by the laser beam expansion lens group (5), the diameter of the red laser beam is larger than the diameter of the blue laser beam, and the diameter of the blue laser beam is larger than the diameter of the green laser beam.

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