A light source module and projection system

Abstract

This application relates to a light source module, including a first light source module and a plurality of second light source modules, a shaping module disposed opposite to the first light source module, and first reflectors corresponding to the number of second light source modules. The first reflectors are positioned in the light emission direction of the corresponding second light source module. Light emitted from the first light source module is directly incident on the shaping module, and light emitted from the second light source modules is reflected by the corresponding first reflectors to the shaping module. The optical path lengths of the first light source module and the plurality of second light source modules reaching the shaping module are consistent. The shaping module is used to shape the light emitted by the first light source module and the plurality of second light source modules. This application helps to improve beam quality.

Description

Technical Field

[0001] This application relates to the field of optical shaping technology, and in particular to a light source module and projection system.

[0002] Background Technology

[0003] Projection systems have wide applications in environmental detection and laser weapons. However, due to power and manufacturing limitations, the power of a single semiconductor laser is low, requiring the laser beams emitted from multiple semiconductor lasers to be combined to achieve the required power.

[0004] In related technologies, two optical shaping schemes are widely used. One is fiber optic bundling, where the light output from the semiconductor laser is first coupled into an optical fiber, then multiple fibers are bundled together, and finally coupled into a thicker fiber via fusion splicing or direct docking. This method is prone to light loss. The second method is spatial bundling, where the light output from the semiconductor laser is collimated, then refracted repeatedly by a mirror, and finally focused into an optical fiber by a focusing lens. This method is prone to inconsistent optical path lengths among the beams. Since optical shaping requires operation on the collimated light, but all beams have a certain divergence angle after collimation, they cannot be treated as perfectly parallel light, resulting in poor beam quality after shaping.

[0005] Therefore, there is an urgent need for a light source module and projection system. Summary of the Invention

[0006] In order to effectively improve beam quality, this application provides a light source module and a projection system.

[0007] This application provides a light source module and projection system using the following technical solution:

[0008] In a first aspect, a light source module includes a first light source module and a plurality of second light source modules, a shaping module disposed opposite to the first light source module, and a first reflector corresponding to the number of second light source modules. The first reflector is disposed in the light emission direction of the corresponding second light source module. Light emitted by the first light source module is directly incident on the shaping module, and light emitted by the second light source module is reflected to the shaping module through the corresponding first reflector. The optical path lengths of the first light source module and the plurality of second light source modules to the shaping module are the same. The shaping module is used to shape the light emitted by the first light source module and the plurality of second light source modules.

[0009] By adopting the above technical solution, the light sources in the light source module are set with equal optical path, so that the light beams with equal intensity output from each light source reach the shaping module with consistent illumination intensity, thereby improving the beam quality of the above optical structure. Furthermore, the parallel light rays generated by the light source remain parallel light rays after being reflected by the mirror. Since the optical path of the light rays emitted from each light source is the same, the probability of light diverging can be effectively reduced, thereby improving the focusing effect of the above optical structure.

[0010] Optionally, the second light source module has the same structure as the first light source module. The second light source module includes a first light source, a plurality of second light sources, and a number of second reflectors that are the same as the number of second light sources. The light beam emitted by the first light source is directly incident on the first reflector. The second reflector is disposed in the light emission direction of the corresponding second light source to reflect the light emitted by the expected second light source to the corresponding first reflector.

[0011] By adopting the above technical solution, fewer reflectors are set to reduce the number of light reflections, thereby ensuring that the light intensity of the light emitted from the light source is consistent when it is projected onto the shaping module, thus achieving the goal of improving beam quality.

[0012] Optionally, the light emitted by the first light source module and the second light source module are perpendicular to each other.

[0013] By adopting the above technical solution, mutually perpendicular light source modules can more easily control the optical path of the emitted light, so that each light source module in the optical structure can more easily achieve the effect of equal optical path.

[0014] Optionally, the first light source and the plurality of second light sources in the first light source module are located on different planes.

[0015] By adopting the above technical solution, the problem of light not being able to be reflected to the first mirror by the second mirror can be avoided when multiple second mirrors are set on the same plane.

[0016] Optionally, the light emitted by the first light source and the second light source are perpendicular to each other.

[0017] By adopting the above technical solution, mutually perpendicular light sources can more easily control the optical path of the emitted light, making it easier for each light source in the light source module to achieve the effect of equal optical path.

[0018] Optionally, the optical path length of the first light source and the plurality of second light sources reaching the midpoint of two relatively disposed second light sources is the same.

[0019] Optionally, the shaping module includes a converging lens, which is used to focus the light emitted from the first light source module and the second light source module.

[0020] Optionally, it may also include a homogenization module, which is disposed in the light emission direction of the shaping module.

[0021] By adopting the above technical solution, the homogenization module helps to fully and uniformly mix multiple beams, thereby improving the light energy utilization rate of the optical structure.

[0022] Optionally, the homogenization module can be any one of a rectangular waveguide, an optical fiber, or an optical waveguide.

[0023] By adopting the above technical solutions, the use of rectangular waveguides helps to reduce optical loss and has a large power capacity. The light energy is guided and propagated in the internal space of the waveguide, which can prevent beam leakage. The use of optical fibers enables total internal reflection of light to reduce optical loss. The use of optical waveguides can improve the imaging effect of the optical structure and reduce optical loss at the same time.

[0024] In a second aspect, a projection system includes a light source module as described in any of the above claims.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting the optical path of the light source in the light source module to be equal, the light intensity of the beams with equal intensity output from each light source reaching the shaping module is consistent, which improves the beam quality of the above optical structure. Since the parallel light generated by the light source is still parallel after being reflected by the mirror and the optical path of the light emitted from each light source is the same, the probability of light diverging can be effectively reduced, thereby improving the focusing effect of the above optical structure.

[0027] 2. Mutually perpendicular light source modules make it easier to control the optical path of the emitted light, so that each light source module in the optical structure can more easily achieve the effect of equal optical path. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a light source module provided in this application;

[0029] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0030] Figure 3 yes Figure 1 Three-dimensional structural diagram at point A in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. First light source module; 11. First light source; 12. Second light source; 13. Second reflector; 14. Collimating lens; 2. Second light source module; 3. Shaping module; 31. Converging lens; 4. First reflector; 5. Light homogenizing module. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-3 This application provides a further detailed description of a light source module and projection system.

[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0034] refer to Figure 1 This application discloses a light source module for emitting laser light with a wavelength of 3.4μm-20μm, including a first light source module 1, a plurality of second light source modules 2, a shaping module 3 disposed opposite to the first light source module 1, and a first reflector 4 corresponding to the number of second light source modules 2.

[0035] In this embodiment, the light emitted by the first light source module 1 and the second light source module 2 are perpendicular to each other. The shaping module 3 is located at the intersection of the optical axes of the first light source module 1 and the second light source module 2, so that the light emitted by the first light source module 1 and the second light source module 2 can be projected into the shaping module 3 as perpendicular parallel light, avoiding light loss caused by oblique incident light. At the same time, the mutually perpendicular first light source module 1 and the second light source module 2 can more easily control the optical path of the emitted light, so that the first light source module 1 and the multiple second light source modules 2 in the optical structure can more easily achieve the effect of equal optical path.

[0036] The light emitted by the first light source module 1 and the multiple second light source modules 2 are all located on the same plane. The fact that the first light source module 1 and the multiple second light source modules 2 are located on the same plane can reduce the volume of the optical path structure, thereby realizing a smaller optical structure, which can make the above optical structure adaptable to more application scenarios.

[0037] The second light source module 2 has the same structure as the first light source module 1. The second light source module 2 includes a first light source 11, multiple second light sources 12, and a number of second reflectors 13 equal to the number of second light sources 12. The light beam emitted from the first light source 11 is directly incident on the first reflector 4. The second reflectors 13 are positioned in the light-emitting direction of the corresponding second light source 12 to reflect the light emitted from the corresponding second light source 12 back to the corresponding first reflector 4. Both the first light source 11 and the second light source 12 are semiconductor lasers. The first light source 11 and the multiple second light sources 12 are located on different planes, which avoids the problem of light not being able to be reflected to the first reflector 4 by multiple second reflectors 13 on the same plane.

[0038] The optical path lengths of the first light source 11 and the plurality of second light sources 12 reaching the midpoint of two relatively positioned second light sources 12 are the same. For example... Figure 2 As shown, the second light source module 2 includes a first light source 11, two second light sources 12, and two second reflectors 13. The two second reflectors 13 are symmetrically arranged to form mutually perpendicular X-shapes. The intersection point of the X-shapes formed by the second reflectors 13 is selected as point A. The first light source 11 and the two second light sources 12 in the second light source module 2 are located on different planes, meaning that each second reflector 13 corresponds to one second light source 12. A collimating lens 14 is provided in the light emission direction of both the first light source 11 and the two second light sources 12.

[0039] In this embodiment, the light emitted by the first light source 11 and the second light source 12 is perpendicular to each other, so that the first light source 11 and the multiple second light sources 12 can all project perpendicular parallel light onto the second reflector 13, avoiding light loss caused by oblique incident light. At the same time, the mutually perpendicular first light source 11 and the second light source 12 can more easily control the optical path of the emitted light, so that the first light source 11 and the multiple second light sources 12 in the first light source module 1 and the second light source module 2 can more easily achieve the effect of equal optical path.

[0040] The first reflector 4 is positioned in the light-emitting direction of the corresponding second light source module 12. The light emitted from the first light source module 1 is directly incident on the shaping module 3, and the light emitted from the second light source module 2 is reflected by the corresponding first reflector 4 to the shaping module 3. The optical path lengths of the first light source module 1 and the multiple second light source modules 2 to the shaping module 3 are consistent. The shaping module 3 is used to shape the light emitted from the first light source module 1 and the multiple second light source modules 12. By using fewer reflectors, the number of light reflections is reduced, thereby ensuring that the illumination intensity of the light emitted from the first light source 11 and the second light source 12 is consistent when projected onto the shaping module 3.

[0041] The shaping module 3 includes a converging lens 31, which is used to converge and shape the light emitted from the first light source module 1 and multiple second light source modules 2.

[0042] The light homogenizing module 5 is used to mix the light emitted by the first light source module 1 and multiple second light source modules 2. The light homogenizing module 5 is set in the light output direction of the shaping module 3. The light homogenizing module 5 can fully and uniformly mix the multiple light beams after the shaping module 3 converges and shapes the light emitted by the first light source module 1 and multiple second light source modules 2, thereby improving the light energy utilization rate of the optical structure.

[0043] In this embodiment, the beam homogenizing module 5 can be any one of a rectangular waveguide, an optical fiber, or an optical waveguide. Using a rectangular waveguide helps reduce optical loss and provides high power capacity; the light energy is guided and propagated within the waveguide's internal space, preventing beam leakage. Using an optical fiber enables total internal reflection, reducing optical loss. Using an optical waveguide improves the imaging effect of the optical structure while reducing optical loss. Preferably, the beam homogenizing module 5 is a rectangular copper waveguide, which can effectively and uniformly mix multiple beams. For applications where the beam homogenizing module 5 is not required, a zoom lens assembly can be used directly for beam processing.

[0044] Implementation principle: Taking the first light source module 1 as an example, the first light source module 1 includes at least one first light source 11 and multiple second light sources 12. The multiple second light sources 12 can be arranged on a circle with the radius from the midpoint of the second reflector 13 to the second light source 12 and the midpoint of the second reflector 13 as the circle. Figure 1 and 3 As shown, after being collimated by the collimating lens 14, the first light source 11 directly outputs its emitted light to the shaping module 3. The first light source 11 is higher than the second light source 12, and a second reflector 13 is placed at the intersection of the emitted light from the first light source 11 and the multiple second light sources 12. At this time, the beam emitted by the second light source 12 is located below the first light source 11, and the two beams emitted by the first light source 11 and the second light source 12 are closely aligned. A second light source 12 is further positioned below the second light source 12 closest to the first light source. This ensures that the optical path lengths of the first light source 11 and the multiple second light sources 12 to the intersection of the multiple second reflectors 13 are consistent. The angle of each second reflector 13 is set to 45 degrees. The first light source module 1 and the second light source module 2 are configured in the same way, so further details are omitted.

[0045] The light emitted by the first light source 11 and the multiple second light sources 12 propagates to the intersection of the multiple second reflectors 13. The first reflector 4 reflects the multiple beams of the first light source 11 and the multiple second light sources 12 at 90°. The shaping module 3 merges the multiple beams emitted from the first light source module 1 and the two second light source modules 2 and inputs them into the uniform light module 5.

[0046] Please refer to Figure 1As shown, this application embodiment also provides a projection system (not shown), including the above-mentioned light source module. The light sources in the light source module are set with equal optical path lengths so that the light beams with equal intensity output from each light source reach the shaping module 3 with consistent illumination intensity, thereby improving the beam quality of the above-mentioned optical structure. Since the parallel light rays generated by the light source are still parallel light rays after being reflected by the mirror and the optical path lengths of the light rays emitted from each light source are the same, the probability of light divergence angle can be effectively reduced, thereby improving the focusing effect of the above-mentioned optical structure.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A light source module, characterized in that, include: The system comprises a first light source module (1), multiple second light source modules (2), a shaping module (3) positioned opposite the first light source module (1), and a first reflector (4) corresponding to the number of second light source modules (2). The first reflector (4) is positioned in the light-emitting direction of the corresponding second light source module (2). The light emitted by the first light source module (1) passes through the air and directly enters the shaping module (3). The light emitted by the second light source module (2) is reflected by the corresponding first reflector (4) to the shaping module (3). The optical path lengths of the first light source module (1) and the multiple second light source modules (2) to the shaping module (3) are consistent. The shaping module (3) is used to shape the light emitted by the first light source module (1) and the multiple second light source modules (2); the second light source module (2) has the same structure as the first light source module (1). The second light source module (2) includes a first light source (11), multiple second light sources (12) and a second reflector (13) with the same number as the second light source (12). The light beam emitted by the first light source (11) is directly incident on the first reflector (4). The second reflector (13) is set in the light output direction of the corresponding second light source (12) to reflect the light emitted by the expected corresponding second light source (12) to the corresponding first reflector (4).

2. The light source module according to claim 1, characterized in that, Multiple second light source modules (2) are located at the same horizontal height, and the light emitted by the first light source module (1) and the second light source module (2) is perpendicular to each other.

3. A light source module according to claim 1, characterized in that, The first light source (11) and multiple second light sources (12) in the first light source module (1) are located on different planes.

4. A light source module according to claim 1, characterized in that, The light emitted by the first light source (11) and the second light source (12) is perpendicular to each other.

5. A light source module according to claim 4, characterized in that, The first light source (11) and the plurality of second light sources (12) have the same optical path to the midpoint of two oppositely arranged second light sources (12).

6. A light source module according to claim 1, characterized in that, The shaping module (3) includes a converging lens (31), which is used to focus the light emitted from the first light source module (1) and the second light source module (2).

7. A light source module according to claim 1, characterized in that, It also includes a light-uniforming module (5), which is disposed in the light-emitting direction of the shaping module (3).

8. A light source module according to claim 7, characterized in that, The uniform light module (5) can be any one of a rectangular waveguide, an optical fiber, or an optical waveguide.

9. A projection system, characterized in that, Includes the light source module as described in any one of claims 1-8.

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