A light source system

Abstract

The utility model belongs to optical system technical field discloses a light source system, including first light source subassembly, in the light source subassembly, the light emitting direction of first light emitting unit and second light emitting unit is perpendicular, makes the part of spectrum light -combining to be more close to the scheme of light emitting direction parallel, thereby forms the coating bright edge smaller on the light -combining element, thus adopts the synergies of polarization light -combining and spectrum light -combining, reduces the use of polarization light -combining element, avoids light polarization loss.

Description

Technical Field

[0001] This utility model belongs to the field of optical system technology, and in particular relates to a light source system. Background Technology

[0002] To achieve a high-brightness projection system, the simplest and most effective solution is to increase the number of light sources. However, increasing the number of light sources often increases the size of the entire light source system, the light spot on the beam combining lens increases, and the corresponding diameter of the light receiving lens also increases. This makes the design of the light source system more difficult. Furthermore, in some architectures, due to the increased number of light sources, more polarization beam combining elements are required, which can easily lead to a decrease in light efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, the light-emitting units are placed vertically in the same light source device, and the synergistic effect of polarization combining and spectral combining is adopted to reduce the use of polarization combining elements, thereby avoiding light polarization loss.

[0004] A light source system, characterized in that it comprises: The first light source assembly includes a first light-emitting unit and a second light-emitting unit. Both the first light-emitting unit and the second light-emitting unit emit a first laser, a second laser, and a third laser. The first laser and the second laser are of different colors. The first light-emitting unit emits light along a first direction, and the second light-emitting unit emits light along a second direction. The first direction is perpendicular to the second direction. The first light source assembly also includes light combining element one and light combining element two; The light combining element 1 includes a first light combining region and a second light combining region. One of the first light combining region and the second light combining region reflects the first laser and transmits the second laser, while the other reflects the second laser and transmits the first laser. One of the first light combining region and the second light combining region combines the spectra of the first laser emitted by the first light-emitting unit and the second laser emitted by the second light-emitting unit and emits the same spectra. The other region combines the spectra of the second laser emitted by the first light-emitting unit and the first laser emitted by the second light-emitting unit and emits the same spectra, so that the light combining element 1 emits a first mixed light. The second light combining element reflects light of the first polarization state and transmits light of the second polarization state, or reflects light of the second polarization state and transmits light of the first polarization state. Of the third laser emitted by the first light-emitting unit and the third laser emitted by the second light-emitting unit, one is of the first polarization state and the other is of the second polarization state. The second light combining element polarizes and combines the third laser emitted by the first light-emitting unit and the third laser emitted by the second light-emitting unit to emit a second mixed light.

[0005] The first beam combiner achieves spectral combining, avoiding disruption of the independence of each wavelength, thus achieving stable anti-interference. The second beam combiner maintains wavefront integrity and transmission direction while avoiding loss or excessive loss of beam quality. This combination of beam combiners produces a beam with a smaller output spot, thus avoiding the need for polarization combining of the first and second lasers, effectively reducing polarization loss, improving imaging quality, and reducing the design complexity of the light source system. Furthermore, the first beam combiner utilizes a partitioned coating method for... In a beam combining partition, the beam combining element will have a certain width of bright edge in the coating when performing spectral beam combining. In other words, when a laser is irradiated in one partition, it may stray into another partition, resulting in the loss of that portion of the laser. The greater the distance between the lasers that need to be combined, the wider the bright edge of the coating. Based on this, when the first light-emitting unit emits light along the first direction and the second light-emitting unit emits light along the second direction, with the first direction perpendicular to the second direction, the distance between the lasers that need to be combined can be effectively reduced, thereby reducing the width of the bright edge of the coating and thus improving the light efficiency.

[0006] Preferably, the first light source assembly further includes a light combining element three and a guiding element four; The light combining element three is disposed in the output light path of the first mixed light and the second mixed light. The first mixed light and the second mixed light have different colors. The light combining element three transmits the first mixed light and reflects the second mixed light, or transmits the second mixed light and reflects the first mixed light. The light combining element three combines the first mixed light and the second mixed light into a single output light. The guiding element four is disposed in the light output path of one of the first light-emitting unit and the second light-emitting unit to form a guiding beam one, and the light combining element three is disposed in the light output path of the other of the first light-emitting unit and the light path of the guiding beam one.

[0007] The light combining element three achieves spectral light combining. After the first mixed light and the second mixed light are emitted by the light combining element one and the light combining element two respectively, the first mixed light and the second mixed light are emitted by the light combining element three through spectral light combining, thereby further reducing the beam spot and reducing the design difficulty of the light source system.

[0008] Preferably, the first light-emitting unit includes a first light-emitting subunit and a second light-emitting subunit. The first light-emitting subunit includes a first light-emitting part and a second light-emitting part. The first light-emitting part emits a first laser, and the second light-emitting part emits a second laser. The second light-emitting subunit includes a third light-emitting part, and the third light-emitting part emits a third laser. The first light-emitting part includes a plurality of light-emitting elements a arranged along a third direction to emit a first laser, and the second light-emitting part includes a plurality of light-emitting elements b arranged along a third direction to emit a second laser, wherein the plurality of light-emitting elements a and the plurality of light-emitting elements b are arranged in a row. The third light-emitting part includes a plurality of light-emitting elements c arranged along a third direction for emitting a third laser beam; In the first light-emitting unit, rows of first and second light-emitting parts are aligned with a third light-emitting part along a second direction; in the second light-emitting unit, rows of first and second light-emitting parts are aligned with a third light-emitting part along a first direction.

[0009] In this application, a basic light-emitting unit is formed by multiple light-emitting elements a, multiple light-emitting elements b, and multiple light-emitting elements c, so that the first laser, the second laser, and the third laser are arranged in a preset arrangement. The structural design proposed in this application, combined with polarization light combining and wavelength light combining, can effectively reduce the light spot and better simplify and optimize the design of the light source system.

[0010] Preferably, the first and second light spots formed by the first laser and the second laser emitted by the first light-emitting unit illuminating the first light-combining element are in opposite positions to the third and fourth light spots formed by the first laser and the second laser emitted by the second light-emitting unit illuminating the first light-combining element.

[0011] Polarized beam combining has the drawback of high cost. In addition, its core function is to superimpose two laser beams with different polarization directions without interference. Theoretically, the total power should be the sum of the powers of the two laser beams. However, in reality, the transmittance of polarized beam combining (the transmittance of one of the first polarization state and the reflectance of the other) cannot reach 100%, and there will inevitably be losses (some laser light is absorbed, scattered, or reflected to non-target directions by the components). Therefore, this application improves the output light quality by reducing the application of polarized beam combining.

[0012] Preferably, it further includes a second light source assembly, which includes a third light-emitting unit and a fourth light-emitting unit, both of which emit a first laser, a second laser, and a third laser. The third and fourth light-emitting units are arranged symmetrically with the first and second light-emitting units; The second light source assembly also includes a light combining assembly for combining the light emitted from the third light-emitting unit and the fourth light-emitting unit and emitting the combined light.

[0013] Based on the first light source assembly, this application can add more second light source assemblies. The second light source assembly can realize the combined light emission of multiple light-emitting units to obtain a light source system with higher brightness.

[0014] Preferably, the light combining component includes: The light combining element four includes a third light combining region and a fourth light combining region. One of the third light combining region and the fourth light combining region reflects the first laser and transmits the second laser, while the other reflects the second laser and transmits the first laser. One of the third light combining region and the fourth light combining region combines the spectra of the first laser emitted by the third light emitting unit and the second laser emitted by the fourth light emitting unit and emits the combined light, while the other combines the spectra of the second laser emitted by the third light emitting unit and the first laser emitted by the fourth light emitting unit and emits the combined light, so that the light combining element four emits a third mixed light. The light combining element five reflects light of the first polarization state and transmits light of the second polarization state, or reflects light of the second polarization state and transmits light of the first polarization state. One of the third laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit is in the first polarization state, and the other is in the second polarization state. The light combining element five polarizes and combines the third laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit to emit a fourth mixed light. A light combining element six is ​​disposed on the output light path of the third mixed light and the fourth mixed light. The first mixed light and the second mixed light have different colors. The light combining element six transmits the third mixed light and reflects the fourth mixed light, or transmits the fourth mixed light and reflects the third mixed light. The light combining element six combines the spectra of the third mixed light and the fourth mixed light for output.

[0015] This application achieves the combined emission of the first, second, and third lasers in the second light source assembly by using a combination of light combining elements four, five, and six. It also adopts the synergistic effect of spectral light combining and polarization light combining to effectively reduce light polarization loss and improve imaging quality, while reducing the design difficulty of the light source system of this application.

[0016] Preferably, both the third and fourth mixed beams are emitted along the first direction. A guiding element two is provided in the optical path of one of the third and fourth mixed beams to refract the beam to the second direction, forming a refracted beam. A combining element six is ​​provided in the optical path of the other mixed beam and the optical path of the refracted beam; or The third mixed light is emitted along the second direction, and a guiding element three is provided on the optical path of the third mixed light to refract the third mixed light to the first direction. The fourth mixed light is emitted along the first direction, and a guiding element four is provided on the optical path of the fourth mixed light to refract the fourth mixed light to the second direction. A light combining element six is ​​provided on the optical paths of the third mixed light in the first direction and the fourth mixed light in the second direction.

[0017] Both of the above-mentioned different optical path architectures can effectively realize the light output of the second light source device, and are simple, practical and easy to set up.

[0018] Preferably, it also includes a third light source assembly, which includes a fifth light-emitting unit, a sixth light-emitting unit, and a light-combining element seven. The fifth light-emitting unit and the sixth light-emitting unit both emit a fourth laser and a fifth laser, respectively, and the fourth laser and the fifth laser are of different colors. The light combining element seven includes a light combining section one and a light combining section two. One of the light combining sections one and two reflects the fourth laser and transmits the fifth laser, while the other reflects the fifth laser and transmits the fourth laser. One of the light combining sections one and two combines the spectrum of the fourth laser emitted by the fifth light-emitting unit and the spectrum of the fifth laser emitted by the sixth light-emitting unit and emits the combined light, while the other combines the spectrum of the fifth laser emitted by the fifth light-emitting unit and the spectrum of the fourth laser emitted by the sixth light-emitting unit and emits the combined light. Alternatively, one of the light combining sections one and two combines the spectrum of the fourth laser emitted by the fifth light-emitting unit and emits the combined light, while the other combines the spectrum of the fourth laser emitted by the sixth light-emitting unit and emits the combined light. The light emitted from the light combining element seven is in the same direction as the light emitted from the first light source assembly; or It also includes a third light source assembly, which includes a fifth light-emitting unit, a sixth light-emitting unit, a polarization combining element one, and a polarization combining element two; the fifth light-emitting unit and the sixth light-emitting unit both emit a fourth laser and a fifth laser, and the polarization state of the fourth laser emitted by different light-emitting units is different and / or the polarization state of the fifth laser emitted is different, the different polarization states being a first polarization state and a second polarization state; The first polarization combining element reflects light of one polarization state (first polarization state) and the second polarization state (second polarization state) while transmitting light of the other polarization state. The second polarization combining element reflects light of one polarization state (first polarization state) and the second polarization combining element while transmitting light of the other polarization state. One of the polarization combining elements emits the fourth laser emitted by the fifth light-emitting unit and the fourth laser emitted by the fourth light-emitting unit, while the other polarizes and emits the fifth laser emitted by the third light-emitting unit and the fifth laser emitted by the fourth light-emitting unit.

[0019] This application can also add a light source component on the basis of the second light source component, thereby obtaining a light source system with higher brightness.

[0020] Preferably, when the fourth laser and the fifth laser are emitted through polarization combining element one and polarization combining element two, a beam combining element seven is further included. The beam combining element seven reflects the fourth laser and transmits the fifth laser, or reflects the fifth laser and transmits the fourth laser. The beam combining element seven combines the spectra of the fourth laser and the fifth laser emitted through polarization combining. The light emitted by the light combining element 7 is in the same direction as the light emitted by the first light source assembly.

[0021] This architecture can effectively achieve the combined light emission of the spectral combining component, so that when three light source components are set in the same light source system, the requirement to improve brightness can be well met.

[0022] Preferably, the first light-emitting unit is located on the first light-emitting plane, the second light-emitting unit is located on the second light-emitting plane, and the fifth and sixth light-emitting units are located on the third light-emitting plane; The first light-emitting plane, the second light-emitting plane, and the third light-emitting plane are perpendicular to each other.

[0023] Based on the positional arrangement of the first and second light-emitting units in the first light-emitting component, this application arranges the fifth and sixth light-emitting units accordingly, which can effectively reduce the volume of the light source system.

[0024] Preferably, the lead wires of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit are connected in the same direction.

[0025] This structure facilitates the routing of the light source system, thereby simplifying the architecture of the light source system.

[0026] Compared with existing technologies, this invention can emit multiple laser beams to improve brightness. By utilizing polarization and wavelength combining, multiple laser beams are combined and emitted, while effectively reducing the width of the bright edge of the coating and ensuring image quality. In addition, this invention can solve the problem of large spot size caused by the combination of multiple laser beams in existing technologies, effectively optimizing and simplifying the design of the light source system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the first light source assembly in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the light combining element one in an embodiment of the present invention; Figure 3 This is a schematic diagram of the first light-emitting subunit in an embodiment of the present invention; Figure 4 This is a schematic diagram of the first light-emitting unit in an embodiment of the present utility model; Figure 5 This is a schematic diagram of a second light source assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram of a second light source assembly in an embodiment of the present invention; Figure 7 This is a schematic diagram showing the arrangement of the first light source assembly, the second light source assembly, and the third light source assembly in an embodiment of this utility model; Figure 8 This is a schematic diagram of a third light source component in an embodiment of this utility model; Figure 9 This is a schematic diagram of a third light source component in an embodiment of this utility model; Figure 10 This is a schematic diagram of a parallelogram-shaped reflector in an embodiment of this utility model; Figure 11 This is a schematic diagram of a parallelogram-shaped reflector in an embodiment of this utility model.

[0028] In the diagram: 100-First light source assembly; 200-Second light source assembly; 300-Third light source assembly; 1-First light-emitting unit; 2-Second light-emitting unit; 3-Light combining element one; 4-Light combining element two; 5-Light combining element three; 6-First light combining area; 7-Second light combining area; 8-First light-emitting subunit; 9-Second light-emitting subunit; 10-First light-emitting part; 11-Second light-emitting part; 13-Guiding element four; 14-Parallelogram reflector; 15-Third light-emitting unit; 16-Fourth light-emitting unit; 17- 18-Light combining element 4; 19-Light combining element 5; 20-Light combining element 6; 21-Guiding element 1; 22-Guiding element 2; 23-Guiding element 3; 24-Fifth light-emitting unit; 25-Sixth light-emitting unit; 26-Light combining section 1; 27-Light combining section 2; 28-First light-emitting plane; 29-Second light-emitting plane; 30-Third light-emitting plane; 31-Polarization combining element 1; 32-Polarization combining element 2; 33-Light combining element 7; 34-Light-emitting element; 35-Polarization conversion element. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.

[0030] like Figure 1 As shown, a light source system includes a first light source assembly 100, which includes a first light-emitting unit 1 and a second light-emitting unit 2. Both the first light-emitting unit 1 and the second light-emitting unit 2 emit a first laser, a second laser, and a third laser. The first laser and the second laser are of different colors. The first light-emitting unit 1 emits light along a first direction, and the second light-emitting unit 2 emits light along a second direction. The first direction is perpendicular to the second direction. The first light source assembly 100 also includes a light-combining element 1 3, a light-combining element 2 4, and a light-combining element 3 5. The light-combining element 1 3 includes a first light-combining region 6 and a second light-combining region 7.

[0031] like Figure 2As shown, the first light-combining region 6 reflects the first laser and transmits the second laser, while the second light-combining region 7 reflects the second laser and transmits the first laser. One of the first light-combining regions 6 and 7 combines the spectra of the first laser emitted from the first light-emitting unit 1 and the second laser emitted from the second light-emitting unit 2, and the other combines the spectra of the second laser emitted from the first light-emitting unit 1 and the first laser emitted from the second light-emitting unit 2, so that the light-combining element 3 emits the first mixed light. It should be noted that in other embodiments, the first light-combining region 6 reflects the second laser and transmits the first laser, and the second light-combining region 7 reflects the first laser and transmits the second laser. That is, in different embodiments, the reflection and transmission characteristics of the first light-combining region 6 and the second light-combining region 7 are opposite to achieve the purpose of light-combining emission. This embodiment only specifically describes one type of reflection and transmission characteristic. The arrangement of optical systems based on other reflection and transmission characteristics is similar to this embodiment and will not be described again here.

[0032] The second light-combining element 4 reflects light of the first polarization state and transmits light of the second polarization state. The third laser emitted from the first light-emitting unit 1 is of the first polarization state, and the third laser emitted from the second light-emitting unit 2 is of the second polarization state. The second light-combining element 4 polarizes and combines the third laser emitted from the first light-emitting unit 1 and the third laser emitted from the second light-emitting unit 2 to emit a second mixed light. It can be understood that the reflection and transmission characteristics of the second light-combining element 4, as well as the polarization states of the third laser emitted from the first light-emitting unit 1 and the third laser emitted from the second light-emitting unit 2, can be set according to actual needs. The specific optical system architecture is similar to that of this embodiment, and therefore will not be described in detail here. The first light source assembly 100 also includes a third light-combining element 5. The third light-combining element 5 is disposed in the output light path of the first mixed light and the second mixed light. The first mixed light and the second mixed light have different colors. The third light-combining element 5 transmits the first mixed light and reflects the second mixed light, or transmits the second mixed light and reflects the first mixed light. The third light-combining element 5 spectrally combines the first mixed light and the second mixed light for output.

[0033] In this embodiment, the first laser is a green laser, the second laser is a blue laser, and the third laser is a red laser, such as... Figure 3 As shown, in the first light-emitting unit 1 and the second light-emitting unit 2, both have a first light-emitting subunit 8 and a second light-emitting subunit 9. The first light-emitting subunit 8 includes a first light-emitting part 10 and a second light-emitting part 11. The first light-emitting part 10 and the second light-emitting part 11 are arranged in a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The first light-emitting part 10 emits a first laser, and the second light-emitting part 11 emits a second laser. The second light-emitting subunit 9 includes a third light-emitting part 12, and the third light-emitting part 12 emits a third laser.

[0034] When the first light-emitting unit 1 emits light along a first direction and the second light-emitting unit 2 emits light along a second direction, that is, the light-emitting arrangement direction of the first light-emitting unit 1 is perpendicular to the light-emitting arrangement direction of the second light-emitting unit 2, the light path of the laser emitted by the first light-emitting unit 1 and the light path of the laser emitted by the second light-emitting unit 2 are significantly reduced compared to the parallel arrangement. In particular, when the first light-emitting subunit 8 of the first light-emitting unit 1 and the first subunit of the second light-emitting unit 2 are close to each other, the bright edge of the coating can be reduced better, thereby better avoiding light loss, and further improving the light efficiency while reducing polarized light combination. If the second light-emitting subunit 9 of the first light-emitting unit 1 and the second light-emitting subunit 9 of the second light-emitting unit 2 are close to each other, the bright edge of the coating can also be effectively reduced compared to the parallel arrangement. In this embodiment, the first laser emitted by the first light-emitting unit 1 and the second laser emitted by the second light-emitting unit 2 are combined and emitted, and the second laser emitted by the first light-emitting unit 1 and the first laser emitted by the second light-emitting unit 2 are combined and emitted.

[0035] In this embodiment, a guiding element 4 13 is also included. The guiding element 4 13 is disposed in the light output path of one of the first light-emitting unit 1 and the second light-emitting unit 2 to form a guiding beam. The light combining element 3 5 is disposed in the light output path of the other of the first light-emitting unit 1 and the light output path of the guiding beam.

[0036] like Figure 4 As shown, in this embodiment, the first light-emitting part 10 includes a plurality of light-emitting elements a arranged along a third direction to emit a first laser beam; the second light-emitting part 11 includes a plurality of light-emitting elements b arranged along a third direction to emit a second laser beam; the plurality of light-emitting elements a and b are arranged in a row; the third light-emitting part 12 includes a plurality of light-emitting elements c arranged along a third direction to emit a third laser beam; in the first light-emitting unit 1, the rows of first light-emitting parts 10 and second light-emitting parts 11 are aligned with the third light-emitting part 12 along a second direction; in the second light-emitting unit 2, the rows of first light-emitting parts 10 and second light-emitting parts 11 are aligned with the third light-emitting part 12 along a first direction. Overall, the light-emitting elements a, b, and c are arranged in a neat rectangular array, which is beneficial to the layout of the overall architecture of the light source system. Specifically, as shown... Figure 2 and Figure 4As shown, taking the first light-emitting unit 1 as an example, let the first light-emitting subunit 8 include 3 light-emitting elements a and 2 light-emitting elements b, and the second light-emitting unit 2 include 5 light-emitting elements c. When aligned, the 5 light-emitting elements formed by the 3 light-emitting elements a and the 2 light-emitting elements b are aligned one-to-one with the light-emitting elements c. That is, the 3 light-emitting elements a correspond to the 3 light-emitting elements at one end of the light-emitting element c, and the 2 light-emitting elements b are aligned with the 2 light-emitting elements at the other end of the light-emitting element c. In this way, the optical path can be simplified.

[0037] For the light-emitting element c, the polarization state of the emitted laser can directly meet the requirements of polarization combining, or a polarization conversion element 35 can be provided on the light-emitting side to convert the initial polarization state of the laser, thereby meeting the requirements of polarization combining. That is, the third light-emitting part 12 of the first light-emitting unit 1 can emit a third laser with a second polarization state. By providing a polarization conversion element 35 on the light-emitting side of the third light-emitting part 12 of the first light-emitting unit 1, the third laser with a second polarization state emitted by the light-emitting part is converted into a first polarization state. Thus, the light combining element 4 achieves polarization combining with the third laser with a second polarization state emitted by the third light-emitting part 12 of the second light-emitting unit 2 for emission. In other words, the second light-emitting unit 2 includes multiple light-emitting elements c arranged along a third direction; or, multiple light-emitting elements c arranged along a third direction, and a polarization conversion element 35 provided on the light-emitting side of the light-emitting element c; the light beam emitted by the light-emitting element c is a third laser with a first polarization state or a second polarization state.

[0038] In this embodiment, the first and second laser beams emitted by the first light-emitting unit 1, when irradiating the light-combining element 3, form the first and second light spots, respectively, which are opposite in position to the third and fourth light spots formed by the first and second laser beams emitted by the second light-emitting unit 2 when irradiating the light-combining element 3. It is known that for schemes using different polarization states for light combination, although the final light spot size is reduced, there is a drawback of increased polarization loss. Therefore, to balance the advantages and disadvantages of different optical architectures, this embodiment achieves the combined emission of the first and second laser beams through spectral light combination. Thus, when the first and second laser beams emitted by the first light-emitting unit 1, when irradiating the light-combining element 3, form the first and second light spots, respectively, which are opposite in position to the third and fourth light spots formed by the first and second laser beams emitted by the second light-emitting unit 2 when irradiating the light-combining element 3, the laser beams of the irradiated light-combining element 3 are partitioned. That is, the first laser beam of the first light-emitting unit 1 corresponds to the second laser beam of the second light-emitting unit 2, and vice versa. At this time, spectral light combination can be achieved using the partitioned light-combining element 3, thereby reducing the application of polarization light combination. To avoid reduced luminous efficiency due to laser crosstalk, taking the first laser of the second light-emitting unit 2 as an example, the preset optical path is for the first laser of the second light-emitting unit 2 to be incident on the second light-combining region 7. However, due to various reasons, part of the first laser of the second light-emitting unit 2 may be incident on the first light-combining region 6. The function of the first light-combining region 6 is to reflect the first laser and transmit the second laser. This results in part of the first laser of the second light-emitting unit 2 failing to transmit, thus losing this portion of light, which leads to a greater loss of luminous efficiency. Therefore, as... Figure 2 As shown, when the first light-emitting part 10 of the first light-emitting unit 1 and the second light-emitting part 11 of the second light-emitting unit 2 correspond to each other, and the second light-emitting part 11 of the first light-emitting unit 1 and the first light-emitting part 10 of the second light-emitting unit 2 correspond to each other, the first laser emitted by the first light-emitting part 10 of the first light-emitting unit 1 and the second laser emitted by the second light-emitting part 11 of the second light-emitting unit 2 fall into the same light-combining region. At the same time, the second laser emitted by the second light-emitting part 11 of the first light-emitting unit 1 and the first laser emitted by the first light-emitting part 10 of the second light-emitting unit 2 fall into the same light-combining region. This minimizes the loss of light effect and reduces the light spot size. In other words, the first light spot and the fourth light spot are located in one of the first light-combining region 6 and the second light-combining region 7, and the second light spot and the third light spot are located in the other of the first light-combining region 6 and the second light-combining region 7. Specifically, in this embodiment, the first light spot and the fourth light spot are located in the first light-combining region 6, and the second light spot and the third light spot are located in the second light-combining region 7.

[0039] In order to minimize the size of the optical system, the light-emitting direction of the light-combining element 3 5 is the same as the light-emitting direction of the second light-emitting unit 2. It can be seen that when the first light spot and the fourth light spot are located in the second light-combining region 7, and the second light spot and the third light spot are located in the first light-combining region 6, the light-emitting direction of the light-combining element 3 5 is the same as the light-emitting direction of the first light-emitting unit 1. This not only minimizes the size of the optical system, but also avoids the need for too many optical components such as reflectors.

[0040] In this embodiment, a parallelogram-shaped reflector 14 is provided on the light-emitting side of the first light-emitting unit 1 and / or the second light-emitting unit 2.

[0041] Taking the first light-emitting unit 1 as an example, the parallelogram-shaped reflector 14 has two sets of surfaces: one set consists of parallel surfaces bm1 and bm2, and the other set consists of parallel surfaces bm3 and bm4. Surfaces bm1 and bm2 are perpendicular to the incident laser, while surfaces bm3 and bm4 are tilted relative to the incident laser. During laser transmission, three light-emitting elements a emit green laser light, and two light-emitting elements b emit blue laser light. Both the green and blue lasers enter surface bm1 with normal incidence. Figure 10 As shown, in one embodiment, after entering the parallelogram reflector 14, the initial propagation directions of the green and blue lasers remain unchanged. The green laser directly passes through surface 2 (bm2) and exits the parallelogram reflector 14, while the blue laser, after entering the parallelogram reflector 14 through surface 1 (bm1), is incident on surface 3 (bm3). Since surface 3 (bm3) is tilted relative to the incident laser, the blue laser is reflected by surface 3 (bm3), guiding it to surface 4 (bm4), and then reflected again by surface 4 (bm4) and exiting from surface 2 (bm2). It can be seen that by changing the exit path of the blue laser through the parallelogram reflector 14, the blue laser is diverted to the other side of the green laser for exit. That is, compared to the initial positions of the blue and green lasers, after exiting the parallelogram reflector 14, the blue spot is on the other side of the green spot. Figure 11As shown, in another embodiment, the difference from the above embodiment is that the light-emitting unit b on the portion covered by surface three bm3, namely the green laser and the blue laser close to the green laser, are emitted directly from surface two bm2. The blue laser away from the green laser is incident on surface three bm3 and then guided to surface four bm4, and then guided through surface four bm4 to surface two bm2 for emission. Thus, the position of this blue laser beam is shifted to the other side of the green laser. In other words, after the green and blue lasers are emitted through the parallelogram reflector 14, the blue light spot will be distributed on both sides of the green light spot. Therefore, according to the requirements of the specific optical architecture, by configuring the parallelogram reflector 14, uniform color distribution can be achieved, thereby improving the uniformity of the image. Furthermore, since the parallelogram mirror 14 can adjust the position of the light spot without changing the direction of beam propagation, that is, the position of the light spot can be controlled by the parallelogram mirror 14, and the light spot can be aligned on the beam combining surface, thereby eliminating the bright edge caused by the misalignment of the light spot and reducing or suppressing the bright edge of the coating in the spectral beam combining process. In other words, the optical path is optimized by using the parallelogram mirror 14, reducing the distance between the green laser (first sub-beam) and the blue laser (second sub-beam), improving the beam combining efficiency, and thus compensating for material defects.

[0042] like Figure 5 and Figure 6 As shown, to further improve the brightness of the light source system, a second light source assembly 200 is also included. The second light source assembly 200 includes a third light-emitting unit 15 and a fourth light-emitting unit 16. Both the third light-emitting unit 15 and the fourth light-emitting unit 16 emit a first laser, a second laser, and a third laser, respectively. The third light-emitting unit 15 emits light along a first direction, and the fourth light-emitting unit 16 emits light along a second direction. The third light-emitting unit 15 and the fourth light-emitting unit 16 are arranged symmetrically with the first light-emitting unit 1 and the second light-emitting unit 2. The second light source assembly 200 also includes a light-combining assembly for combining the light emitted by the third light-emitting unit 15 and the fourth light-emitting unit 16 for combined light emission. Similar to the first light source assembly 100, the second light source assembly 200 also achieves laser light emission through the synergistic effect of spectral light combining and polarization light combining.

[0043] Specifically, the light combining assembly includes light combining element four 17, light combining element five 18, and light combining element six 19; light combining element four 17 includes a third light combining region and a fourth light combining region, the third light combining region reflects the first laser and transmits the second laser, and the fourth light combining region reflects the second laser and transmits the first laser. One of the third and fourth light combining regions combines the spectra of the first laser emitted from the third light-emitting unit 15 and the second laser emitted from the fourth light-emitting unit 16, and the other combines the spectra of the second laser emitted from the third light-emitting unit 15 and the first laser emitted from the fourth light-emitting unit 16, so that light combining element four 17 emits a third mixed light; light combining element five 18 reflects the first polarization state The light emitted by the third light-emitting unit 15 is in the first polarization state, and the light emitted by the fourth light-emitting unit 16 is in the second polarization state. The light combining element 18 combines the third laser emitted by the third light-emitting unit 15 and the third laser emitted by the fourth light-emitting unit 16 into a fourth mixed light. The light combining element 19 is disposed on the output light path of the third mixed light and the fourth mixed light. The first mixed light and the second mixed light have different colors. The light combining element 19 transmits the third mixed light and reflects the fourth mixed light, or transmits the fourth mixed light and reflects the third mixed light. The light combining element 19 spectrally combines the third mixed light and the fourth mixed light into an output light.

[0044] It should be noted that in other embodiments, the third light-combining region reflects the second laser and transmits the first laser, and the fourth light-combining region reflects the first laser and transmits the second laser. That is, in different embodiments, the reflection and transmission characteristics of the third and fourth light-combining regions are opposite to achieve the purpose of light-combining emission. This embodiment only describes one type of reflection and transmission characteristic. The arrangement of the optical system based on other reflection and transmission characteristics is similar to this embodiment and will not be repeated here. The reflection and transmission characteristics of the light-combining element 18, as well as the polarization states of the third laser emitted by the third light-emitting unit 15 and the third laser emitted by the fourth light-emitting unit 16, can also be set according to actual needs. The specific optical system architecture is similar to this embodiment and will not be repeated here.

[0045] In this embodiment, the laser optical path in the second light source assembly 200 and the laser light source in the first light source assembly 100 may be the same or different. In one implementation, such as Figure 5 As shown, both the third and fourth mixed beams are emitted along the second direction. A guiding element 20 is provided in the optical path of one of the third and fourth mixed beams to refract the beam to the first direction, forming a refracted beam. A combining element 19 is provided in the optical path of the other mixed beam and the optical path of the refracted beam. In another embodiment, as... Figure 6As shown, the third mixed light is emitted along the second direction, and a guiding element 21 is provided on the optical path of the third mixed light to deflect it to the first direction. The fourth mixed light is emitted along the first direction, and a guiding element 22 is provided on the optical path of the fourth mixed light to deflect it to the second direction. A light combining element 19 is provided on the optical paths of the third mixed light in the first direction and the fourth mixed light in the second direction. It can be seen that both of the above embodiments can achieve co-directional emission of the beams from the first light source device and the second light source device.

[0046] In this embodiment, the light emitted by the third light-emitting unit 15 and the fourth light-emitting unit 16 can also be provided with a parallelogram-shaped reflector 14. In addition, the lead wires of the first light-emitting unit 1, the second light-emitting unit 2, the third light-emitting unit 15, and the fourth light-emitting unit 16 are connected in the same direction to facilitate wire output.

[0047] This embodiment can further increase the light source to further improve the brightness, specifically, such as... Figure 7 and Figure 8 As shown, it also includes a third light source assembly 300, which includes a fifth light-emitting unit 23, a sixth light-emitting unit 24, and a light-combining element 33. The fifth light-emitting unit 23 and the sixth light-emitting unit 24 both emit a fourth laser and a fifth laser, respectively, and the fourth laser and the fifth laser are of different colors. The light-combining element 33 includes a light-combining section 1 25 and a light-combining section 26. The light-combining section 1 25 reflects the fourth laser and transmits the fifth laser, while the light-combining section 26 reflects the fifth laser and transmits the fourth laser. One of the light-combining sections 1 25 and the light-combining section 26 combines the spectra of the fourth laser emitted by the fifth light-emitting unit 23 and the fifth laser emitted by the sixth light-emitting unit 24 and emits the combined light, while the other combines the spectra of the fifth laser emitted by the fifth light-emitting unit 23 and the fourth laser emitted by the sixth light-emitting unit 24 and emits the combined light. The light emitted by the light-combining element 33 is in the same direction as the light emitted by the first light source assembly 100. The light combining section 25 and the light combining section 26 can be two independent spectral combining elements, or they can be configured as spectral combining elements with partitioned coating. Simultaneously, reflectors can be provided in the optical paths of the fourth and fifth lasers, so that the lasers emitted from the light combining section 25 and the light combining section 26 are emitted in the same direction. In another embodiment, one of the light combining sections 25 and 26 combines the fourth laser emitted by the fifth light-emitting unit 23 and the fifth laser emitted by the fifth light-emitting unit 23, and the other combines the fourth laser emitted by the sixth light-emitting unit 24 and the fifth laser emitted by the sixth light-emitting unit 24.

[0048] It should be noted that in other embodiments, the light combining part 1 25 reflects the fifth laser and transmits the fourth laser, and the light combining part 2 26 reflects the fourth laser and transmits the fifth laser. That is to say, in different embodiments, the reflection and transmission characteristics of the light combining part 1 25 and the light combining part 2 26 are opposite to meet the purpose of light combining and emission. This embodiment only describes one type of reflection and transmission characteristic. The arrangement of optical systems based on other reflection and transmission characteristics is similar to this embodiment and will not be described again here.

[0049] In this embodiment, the fifth light-emitting unit 23 and the sixth light-emitting unit 24 have the same light-emitting element 34 arrangement as the first light-emitting unit 1 to the fourth light-emitting unit 16. In addition, the fourth laser in this embodiment is a mixture of green laser and blue laser, and the fifth laser is a red laser.

[0050] like Figure 7 As shown, in this embodiment, the first light-emitting unit 1 is located on the first light-emitting plane 27, the second light-emitting unit 2 is located on the second light-emitting plane 28, and the fifth light-emitting unit 23 and the sixth light-emitting unit 24 are located on the third light-emitting plane 29; the first light-emitting plane 27, the second light-emitting plane 28, and the third light-emitting plane 29 are perpendicular to each other. Since the arrangement of the light-emitting units of the first light source device and the second light source device is symmetrical, in this embodiment, the third light-emitting unit 15 is located on the fourth light-emitting plane 30, the fourth light-emitting plane 30 is parallel to the first light-emitting plane 27, and the fourth light-emitting unit 16 is located on the second light-emitting plane 28.

[0051] In this embodiment, shaping elements are provided in the optical paths of the green and blue lasers of any one of the three light source components: the first light source assembly 100, the second light source assembly 200, and the third light source assembly 300. These shaping elements can be either beam-shrinking or beam-diffusing elements, ensuring that the green, blue, and red lasers have similar spot sizes, thereby improving image quality. Typically, the red laser spot is larger; therefore, beam-diffusing elements are provided in the optical paths of the first, second, and fourth lasers, ensuring that the final emitted spot sizes of the first, second, and fourth lasers are similar to or identical to the emitted spot sizes of the third and fifth lasers. This improves the uniformity of color mixing and brightness. Furthermore, because the spot sizes of the various colors of lasers are similar or identical, they can better match the dimensions of subsequent optical components, thus reducing the overall size of the optical system and improving its performance. Similarly, beam-shrinking elements in the optical paths of the third and fifth lasers can achieve similar or identical effects.

[0052] like Figure 9As shown, this embodiment can also achieve light output from the third light source component 300 through polarization combining. Although polarization loss increases, the advantage is a smaller light spot and a better-designed combining system. Specifically, it also includes a third light source component 300, which includes a fifth light-emitting unit 23, a sixth light-emitting unit 24, a first polarization combining element 31, and a second polarization combining element 32. The fifth light-emitting unit 23 and the sixth light-emitting unit 24 both emit a fourth laser and a fifth laser. The fourth laser emitted by different light-emitting units has a different polarization state, and / or the fifth laser emitted by different light-emitting units has a different polarization state. The different polarization states are a first polarization state and a second polarization state. The first polarization combining element 31 reflects light of one of the first polarization state and the second polarization state while transmitting light of the other polarization state. The second polarization combining element 32 reflects light of one of the first polarization state and the second polarization state. The system transmits light of a different polarization state while maintaining the same polarization state. One of the polarization combining elements 31 and 32 outputs the fourth laser emitted by the fifth light-emitting unit 23 and the fourth laser emitted by the fourth light-emitting unit 16, while the other outputs the fifth laser emitted by the fifth light-emitting unit 23 and the fifth laser emitted by the fourth light-emitting unit 16. The system also includes a combining element 33, which reflects the fourth laser and transmits the fifth laser, or reflects the fifth laser and transmits the fourth laser. The combining element 33 combines the polarized light emitted by the fourth and fifth lasers and outputs the combined light. The light emitted by the combining element 33 is in the same direction as the light emitted by the first light source assembly 100. In this embodiment, the polarization combining element 31 and the polarization combining element 32 can be two separate optical components.

[0053] In this embodiment, the fifth light-emitting unit 23 and the sixth light-emitting unit 24 include a light-emitting element 34, or a light-emitting element 34 and a polarization conversion element 35 disposed on the light-emitting side of the light-emitting element 34, thereby enabling the polarization combining element 1 31 and the polarization combining element 2 32 to achieve polarization-combined light emission of laser light. For example, the polarization combining element 1 31 reflects the third laser light of the first polarization state emitted from the sixth light-emitting unit 24 and transmits the third laser light of the second polarization state emitted from the fifth light-emitting unit 23; the polarization combining element 2 32 reflects the fourth laser light of the second polarization state emitted from the sixth light-emitting unit 24 and transmits the fourth laser light of the first polarization state emitted from the fifth light-emitting unit 23. When the polarization combining element 1 31 and the polarization combining element 2 32 both combine and emit light beams, since the third laser and the fourth laser have different colors, they can be emitted using spectral combining element 7 33. In this embodiment, the combining element 7 33 reflects the third laser light and transmits the fourth laser light. Based on this, a corresponding reflector can be set to refract the optical path of the polarized emitted third laser light to illuminate the spectral combining component.

[0054] It should be noted that in other embodiments, the first polarization combining element reflects light of the second polarization state and transmits light of the first polarization state, while the second polarization combining element reflects light of the first polarization state and transmits light of the second polarization state. That is, in different embodiments, the reflection and transmission characteristics of the first polarization combining element and the second polarization combining element are opposite to achieve the purpose of light combining and emission. This embodiment only describes one type of transmission and reflection characteristic. The arrangement of optical systems based on other transmission and reflection characteristics is similar to this embodiment and will not be described in detail here.

[0055] The light source system in this embodiment is used in a projection device. Besides the light source system, the projection device also includes an illumination component, a light modulation element, and an imaging component. The light emitted from the light source system is homogenized by the illumination component and then enters the light modulation element. The light modulation element modulates the illumination light into image light carrying image information according to the image signal. This image light then enters the imaging component and is projected out of the projection device. In this embodiment, at least two variable apertures are provided in the optical path of the projection device (variable apertures are provided between the light source system and the imaging component, and within the imaging component). These two variable apertures dynamically adjust the light aperture to effectively block scattered and diffracted light in conjunction with the light modulation element, thereby improving contrast. The position of the variable aperture between the light source system and the imaging component is preferably where the light is relatively collimated / parallel / focused.

[0056] The above are merely preferred embodiments of this utility model. It should be noted that the above preferred embodiments should not be considered as limitations on this utility model, and the scope of protection of this utility model should be determined by the scope defined in the claims. For those skilled in the art, several improvements and modifications can be made without departing from the spirit and scope of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A light source system, characterized in that, include: The first light source assembly includes a first light-emitting unit and a second light-emitting unit. Both the first light-emitting unit and the second light-emitting unit emit a first laser, a second laser, and a third laser. The first laser and the second laser are of different colors. The first light-emitting unit emits light along a first direction, and the second light-emitting unit emits light along a second direction. The first direction is perpendicular to the second direction. The first light source assembly also includes light combining element one and light combining element two; The light combining element 1 includes a first light combining region and a second light combining region. One of the first light combining region and the second light combining region reflects the first laser and transmits the second laser, while the other reflects the second laser and transmits the first laser. One of the first light combining region and the second light combining region combines the spectra of the first laser emitted by the first light-emitting unit and the second laser emitted by the second light-emitting unit and emits the same spectra. The other region combines the spectra of the second laser emitted by the first light-emitting unit and the first laser emitted by the second light-emitting unit and emits the same spectra, so that the light combining element 1 emits a first mixed light. The second light combining element reflects light of the first polarization state and transmits light of the second polarization state, or reflects light of the second polarization state and transmits light of the first polarization state. Of the third laser emitted by the first light-emitting unit and the third laser emitted by the second light-emitting unit, one is of the first polarization state and the other is of the second polarization state. The second light combining element polarizes and combines the third laser emitted by the first light-emitting unit and the third laser emitted by the second light-emitting unit to emit a second mixed light.

2. The light source system as described in claim 1, characterized in that, The first light source assembly also includes a light combining element three and a guiding element four; The light combining element three is disposed in the output light path of the first mixed light and the second mixed light. The first mixed light and the second mixed light have different colors. The light combining element three transmits the first mixed light and reflects the second mixed light, or transmits the second mixed light and reflects the first mixed light. The light combining element three combines the first mixed light and the second mixed light into a single output light. The guiding element four is disposed in the light output path of one of the first light-emitting unit and the second light-emitting unit to form a guiding beam one, and the light combining element three is disposed in the light output path of the other of the first light-emitting unit and the light path of the guiding beam one.

3. The light source system as described in claim 1, characterized in that, The first light-emitting unit includes a first light-emitting subunit and a second light-emitting subunit. The first light-emitting subunit includes a first light-emitting part and a second light-emitting part. The first light-emitting part emits a first laser, and the second light-emitting part emits a second laser. The second light-emitting subunit includes a third light-emitting part, and the third light-emitting part emits a third laser. The first light-emitting part includes a plurality of light-emitting elements a arranged along a third direction to emit a first laser, and the second light-emitting part includes a plurality of light-emitting elements b arranged along a third direction to emit a second laser, wherein the plurality of light-emitting elements a and the plurality of light-emitting elements b are arranged in a row. The third light-emitting part includes a plurality of light-emitting elements c arranged along a third direction for emitting a third laser beam; In the first light-emitting unit, rows of first and second light-emitting parts are aligned with a third light-emitting part along a second direction; in the second light-emitting unit, rows of first and second light-emitting parts are aligned with a third light-emitting part along a first direction.

4. A light source system as described in claim 1, characterized in that, The first and second light spots formed by the first laser and the second laser emitted by the first light-emitting unit illuminating the first light-combining element are in opposite positions to the third and fourth light spots formed by the first laser and the second laser emitted by the second light-emitting unit illuminating the first light-combining element.

5. A light source system as described in any one of claims 1 to 4, characterized in that, It also includes a second light source assembly, which includes a third light-emitting unit and a fourth light-emitting unit, both of which emit a first laser, a second laser, and a third laser. The third and fourth light-emitting units are arranged symmetrically with the first and second light-emitting units; The second light source assembly also includes a light combining assembly for combining the light emitted from the third light-emitting unit and the fourth light-emitting unit and emitting the combined light.

6. A light source system as described in claim 5, characterized in that, The light combining component includes: The light combining element four includes a third light combining region and a fourth light combining region. One of the third light combining region and the fourth light combining region reflects the first laser and transmits the second laser, while the other reflects the second laser and transmits the first laser. One of the third light combining region and the fourth light combining region combines the spectra of the first laser emitted by the third light emitting unit and the second laser emitted by the fourth light emitting unit and emits the combined light, while the other combines the spectra of the second laser emitted by the third light emitting unit and the first laser emitted by the fourth light emitting unit and emits the combined light, so that the light combining element four emits a third mixed light. The light combining element five reflects light of the first polarization state and transmits light of the second polarization state, or reflects light of the second polarization state and transmits light of the first polarization state. One of the third laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit is in the first polarization state, and the other is in the second polarization state. The light combining element five polarizes and combines the third laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit to emit a fourth mixed light. A light combining element six is ​​disposed on the output light path of the third mixed light and the fourth mixed light. The first mixed light and the second mixed light have different colors. The light combining element six transmits the third mixed light and reflects the fourth mixed light, or transmits the fourth mixed light and reflects the third mixed light. The light combining element six combines the spectra of the third mixed light and the fourth mixed light for output.

7. A light source system as described in claim 6, characterized in that, Both the third and fourth mixed beams are emitted along the first direction. A guiding element two is provided in the optical path of one of the third and fourth mixed beams to refract the beam to the second direction, forming a refracted beam. A beam combining element six is ​​provided in the optical path of the other mixed beam and the optical path of the refracted beam; or... The third mixed light is emitted along the second direction, and a guiding element three is provided on the optical path of the third mixed light to refract the third mixed light to the first direction. The fourth mixed light is emitted along the first direction, and a guiding element four is provided on the optical path of the fourth mixed light to refract the fourth mixed light to the second direction. A light combining element six is ​​provided on the optical paths of the third mixed light in the first direction and the fourth mixed light in the second direction.

8. A light source system as described in claim 5, characterized in that, It also includes a third light source assembly, which includes a fifth light-emitting unit, a sixth light-emitting unit, and a light-combining element seven. The fifth and sixth light-emitting units both emit a fourth laser and a fifth laser, respectively, and the fourth and fifth lasers are of different colors. The light combining element seven includes a light combining section one and a light combining section two. One of the light combining sections one and two reflects the fourth laser and transmits the fifth laser, while the other reflects the fifth laser and transmits the fourth laser. One of the light combining sections one and two combines the spectrum of the fourth laser emitted by the fifth light-emitting unit and the spectrum of the fifth laser emitted by the sixth light-emitting unit and emits the combined light, while the other combines the spectrum of the fifth laser emitted by the fifth light-emitting unit and the spectrum of the fourth laser emitted by the sixth light-emitting unit and emits the combined light. Alternatively, one of the light combining sections one and two combines the spectrum of the fourth laser emitted by the fifth light-emitting unit and emits the combined light, while the other combines the spectrum of the fourth laser emitted by the sixth light-emitting unit and emits the combined light. The light emitted from the light combining element seven is in the same direction as the light emitted from the first light source assembly; or It also includes a third light source assembly, which includes a fifth light-emitting unit, a sixth light-emitting unit, a polarization combining element one, and a polarization combining element two; the fifth light-emitting unit and the sixth light-emitting unit both emit a fourth laser and a fifth laser, and the polarization state of the fourth laser emitted by different light-emitting units is different and / or the polarization state of the fifth laser emitted is different, the different polarization states being a first polarization state and a second polarization state; The first polarization combining element reflects light of one polarization state (first polarization state) and the second polarization state (second polarization state) while transmitting light of the other polarization state. The second polarization combining element reflects light of one polarization state (first polarization state) and the second polarization combining element while transmitting light of the other polarization state. One of the polarization combining elements emits the fourth laser emitted by the fifth light-emitting unit and the fourth laser emitted by the fourth light-emitting unit, while the other polarizes and emits the fifth laser emitted by the third light-emitting unit and the fifth laser emitted by the fourth light-emitting unit.

9. A light source system as described in claim 8, characterized in that, When the fourth laser and the fifth laser are polarized and emitted through polarization combining element one and polarization combining element two, a beam combining element seven is also included. The beam combining element seven reflects the fourth laser and transmits the fifth laser, or reflects the fifth laser and transmits the fourth laser. The beam combining element seven combines the spectra of the fourth laser and the fifth laser emitted by polarization combining and emits them. The light emitted by the light combining element 7 is in the same direction as the light emitted by the first light source assembly.

10. A light source system as described in claim 8, characterized in that, The first light-emitting unit is located on the first light-emitting plane, the second light-emitting unit is located on the second light-emitting plane, and the fifth and sixth light-emitting units are located on the third light-emitting plane; The first light-emitting plane, the second light-emitting plane, and the third light-emitting plane are perpendicular to each other.

11. A light source system as described in claim 5, characterized in that, The lead wires of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit are connected in the same direction.

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