A light source system

Abstract

The utility model belongs to optical system technical field discloses a kind of light source systems, including first light source assembly and second light source assembly, in each light source assembly, the light emitted by the pair of first light emitting unit and second light emitting unit of polarized light combining component is polarized light combining, and the light of first light source assembly, second light source assembly respectively polarized light combining light exit is carried out spectral light combining exit by partition light combining element one, by the rearrangement of optical architecture, on the basis of increasing luminous light source, effectively reduce light spot, and make light spot after light combining symmetrical along optical axis, to better realize the simplification, optimization design of light source system.

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 combining lens will increase, and the corresponding diameter of the receiving lens will also increase, thus making the design of the light source system more difficult. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model discloses a light source system that, by adding a light source, effectively reduces the light spot size and makes the combined light spot symmetrical along the optical axis, thereby better achieving a simplified and optimized design of the light source system.

[0004] The specific technical solution of this utility model is as follows: A light source system, comprising: The first light source assembly and the second light source assembly each include a first light-emitting unit, a second light-emitting unit, and a light-combining component; the first light-emitting unit and the second light-emitting unit each emit a first laser and a second laser, and the polarization state of the first laser emitted by different light-emitting units is different and / or the polarization state of the second laser emitted is different, the different polarization states being the first polarization state and the second polarization state; The light combining component includes a polarization light combining component one, which reflects light of a first polarization state and transmits light of a second polarization state, and / or reflects light of a second polarization state and transmits light of a first polarization state. The polarization light combining component one polarizes and combines the first laser emitted from different light-emitting units and / or the second laser emitted from different light-emitting units into a single output. It also includes a partitioned light combining element, which 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 source component and the second laser emitted by the first light source component and emits them together. The other region combines the spectra of the second laser emitted by the first light source component and the first laser emitted by the first light source component and emits them together.

[0005] The polarization beam combining component can maintain wavefront integrity and transmission direction while avoiding loss or excessive loss of beam quality. Then, it achieves spectral beam combining through the partition beam combining element, which can avoid destroying the independence of each wavelength, thereby achieving stable anti-interference and outputting a beam with a smaller spot size. This effectively reduces the design difficulty of the light source system while improving imaging quality.

[0006] Preferably, both the first light-emitting unit and the second light-emitting unit include a first light-emitting sub-unit and a second light-emitting sub-unit, wherein the first light-emitting sub-unit is used to emit a first laser beam and the second light-emitting sub-unit is used to emit a second laser beam; the first laser beam includes a first sub-beam and a second sub-beam. The first light-emitting subunit includes a first light-emitting part and a second light-emitting part. The first light-emitting part has a plurality of light-emitting elements a arranged along the fourth direction to emit a first sub-light. The second light-emitting part has a plurality of light-emitting elements b arranged along the fourth direction to emit a second sub-light. The plurality of light-emitting elements a and the plurality of light-emitting elements b are arranged in a row. The second light-emitting subunit includes a third light-emitting part, wherein a plurality of light-emitting elements c are arranged along the fourth direction to emit a second laser beam; Among them, the first laser and the second laser have different colors and different polarization states; the first sub-light and the second sub-light have different colors but the same polarization state. The first and second light-emitting parts, arranged in a row, are aligned with the third light-emitting part at intervals in a first direction; The first direction, the third direction, and the fourth direction are perpendicular to each other.

[0007] 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 sub-light, the second sub-light, and the second 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.

[0008] Preferably, in the same light source assembly, the arrangement direction of the first light-emitting part and the second light-emitting part of the first light-emitting unit is opposite to the arrangement direction of the first light-emitting part and the second light-emitting part of the second light-emitting unit; The light combining component further includes a second partitioned light combining element, which is disposed in the light output path of the first laser. The second partitioned light combining element 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 sub-light and transmits the second sub-light, while the other reflects the second sub-light and transmits the first sub-light. One of the third light combining region and the fourth light combining region performs a spectral combination of the first sub-light emitted by the first light-emitting unit and the second sub-light emitted by the second light-emitting unit, while the other performs a spectral combination of the second sub-light emitted by the first light-emitting unit and the first sub-light emitted by the second light-emitting unit. The polarization combining component 1 outputs polarized light from the second laser emitted by different light-emitting units.

[0009] 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.

[0010] Preferably, in any light source assembly, the first light-emitting unit and the second light-emitting unit are arranged along a first direction, which is perpendicular to the second direction; The partitioned light combining element emits light along a first direction.

[0011] The light-emitting architecture has a simple layout and can effectively reduce the system size while using the same number of components.

[0012] Preferably, the first light source assembly and the second light source assembly are misaligned in a first direction, and the first direction is perpendicular to the second direction; Alternatively, one of the first light-emitting unit and the second light-emitting unit of the first light source assembly is aligned with the first light-emitting unit of the second light source assembly, and the other is aligned with the second light-emitting unit of the second light source assembly. Wherein, the first light source component emits light along the second direction, and the second light source component emits light along the third direction, wherein the second direction and the third direction are parallel and opposite.

[0013] This structure facilitates the arrangement of light combining components, avoids positional interference between light combining components from different light source components, and thus better meets the light combining requirements.

[0014] Preferably, both the first light-emitting unit and the second light-emitting unit include: Light-emitting elements used to emit laser light; Alternatively, a light-emitting element for emitting laser light, and a polarization conversion element disposed on the light-emitting side of the light-emitting element; The laser emitted by the light-emitting element is either in a first polarization state or a second polarization state.

[0015] In this application, the polarization state of the light emitted by the light-emitting element can directly meet the requirements of polarization combining, or the polarization state of the emitted light can be changed by adding a polarization conversion element to meet the requirements of polarization combining.

[0016] Preferably, it also includes a third light source assembly, which includes a third light-emitting unit, a fourth light-emitting unit, and a spectral combining component. The third light-emitting unit and the fourth light-emitting unit both emit a third laser and a fourth laser, and the third laser and the fourth laser are of different colors. The spectral combining component includes a spectral combining section one and a spectral combining section two. One of the spectral combining sections one and two reflects a third laser and transmits a fourth laser, while the other reflects a fourth laser and transmits a third laser. One of the spectral combining sections one and two emits a spectrally combined light from the third laser emitted by the third light-emitting unit and the fourth laser emitted by the fourth light-emitting unit, while the other emits a spectrally combined light from the fourth laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit. Alternatively, one of the spectral combining sections one and two emits a spectrally combined light from the third laser emitted by the third light-emitting unit and the fourth laser emitted by the third light-emitting unit, while the other emits a spectrally combined light from the third laser emitted by the fourth light-emitting unit and the fourth laser emitted by the fourth light-emitting unit. The light emitted by the spectral combining component is in the same direction as the light emitted by the partitioned combining element; or It also includes a third light source assembly, which includes a third light-emitting unit, a fourth light-emitting unit, and a second polarization combining component; the second polarization combining component includes a third polarization combining element and a fourth polarization combining element; both the third light-emitting unit and the fourth light-emitting unit emit third laser and fourth laser, respectively, and the polarization states of the third laser emitted by different light-emitting units are different and / or the polarization states of the fourth laser emitted are different, and the different polarization states are a first polarization state and a second polarization state; The third 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 fourth 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. One of the polarization combining elements three and four emits a third laser emitted by the third light-emitting unit and a third laser emitted by the fourth light-emitting unit. The other polarization combining element emits a fourth laser emitted by the third light-emitting unit and a fourth laser emitted by the fourth light-emitting unit.

[0017] This application enables the addition of light source components, thereby obtaining a light source system with higher brightness.

[0018] Preferably, when the third laser and the fourth laser are emitted through the polarization combining component, the system further includes a spectral combining component. The spectral combining component reflects the third laser and transmits the fourth laser, or reflects the fourth laser and transmits the third laser. The spectral combining component then emits the polarization combined third laser and the fourth laser through spectral combining. The light emitted by the spectral combining component is in the same direction as the light emitted by the partitioned combining element.

[0019] 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.

[0020] Preferably, the first light-emitting unit and the second light-emitting unit of the first light source assembly are arranged side by side on the first light-emitting plane, and the first light-emitting unit and the second light-emitting unit of the second light source assembly are arranged side by side on the second light-emitting plane. The first light-emitting plane and the second light-emitting plane are parallel, and the light emitted from the first light-emitting plane is parallel and opposite to the light emitted from the second light-emitting plane. The third and fourth light-emitting units are arranged on the third light-emitting plane, and the light emitted from the third light-emitting plane is perpendicular to the light emitted from the first light-emitting plane; or, one of the third and fourth light-emitting units is arranged on the first light-emitting plane, and the other is arranged on the second light-emitting plane.

[0021] Based on the first and second light source components, this application arranges the third and fourth light-emitting units in corresponding positions, which can effectively reduce the size of the light source system.

[0022] Preferably, when one of the third light-emitting unit and the fourth light-emitting unit is arranged on the first light-emitting plane and the other is arranged on the second light-emitting plane, the third light-emitting unit and the fourth light-emitting unit are misaligned in the light-emitting direction of the partitioned light-combining element.

[0023] In the third light source assembly, the light emitted by the third and fourth light-emitting units is combined through spectral light. When the third and fourth light-emitting units are misaligned in the light-emitting direction of the first partitioned light-combining element, interference in the arrangement of optical components can be effectively avoided, and the arrangement volume can be reduced.

[0024] Preferably, a shaping element is provided in the output optical path of the first laser and / or the second laser.

[0025] The shaping element can be either a beam-shrinking element or a beam-diffusing element, so that the first laser and the second laser have similar spot sizes, thereby improving the imaging quality.

[0026] Preferably, a shaping element two is provided in the output optical path of the third laser and / or the fourth laser.

[0027] The second shaping element can be either a beam-shrinking element or a beam-diffusing element, so that the third laser and the fourth laser have similar spot sizes, thereby improving the imaging quality.

[0028] Compared with existing technologies, this invention can emit multiple laser beams to improve brightness. By utilizing polarization beam combining and wavelength beam combining, multiple laser beams are combined and emitted, effectively ensuring imaging quality. At the same time, it solves the problem of large light spots 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

[0029] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the first light source device in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the first light source device in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the first light-emitting subunit in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the first light-emitting unit in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the first light source device in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of a light spot according to an embodiment of the present invention; Figure 8 This is a schematic diagram showing an arrangement of the first light-emitting unit and the second light-emitting unit in Embodiment 2 of this utility model; Figure 9 This is a schematic diagram of the first light source device in Embodiment 2 of this utility model; Figure 10 This is a schematic diagram of a light spot according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the bright edge of the coating; Figure 12 This is a schematic diagram of the third light source device in Embodiment 3 of this utility model; Figure 13 This is a schematic diagram of a light source system arrangement according to Embodiment 3 of this utility model; Figure 14 This is a schematic diagram of a light source system arrangement according to Embodiment 3 of this utility model; Figure 15This is a schematic diagram of the third light source device in Embodiment 3 of this utility model; Figure 16 This is a schematic diagram of the third light source device in Embodiment 4 of this utility model; Figure 17 This is a schematic diagram of a light spot according to an embodiment of the present invention; Figure 18 This is a schematic diagram of a parallelogram-shaped reflector in an embodiment of this utility model; Figure 19 This is a schematic diagram of a parallelogram-shaped reflector in an embodiment of this utility model.

[0030] In the diagram: 100-First light source assembly; 200-Second light source assembly; 300-Third light source assembly; 1-Divider light combining element one; 2-First light-emitting unit; 3-Second light-emitting unit; 4-First light-emitting sub-unit; 5-Second light-emitting sub-unit; 6-First light-emitting part; 7-Second light-emitting part; 8-Third light-emitting part; 9-Light-emitting element; 10-Polarization conversion element; 11-Polarization light combining element one; 12-Polarization light combining element two; 13-Reflector; 14-Guiding element; 15-Shaping element one; 16-Divider light combining element two; 17-Third light-emitting unit; 18-Fourth light-emitting unit; 19-Spectral light combining part one; 20-Spectral light combining part two; 21-Shaping element two; 22-Polarization light combining element three; 23-Polarization light combining element four; 24-Spectral light combining element two. Detailed Implementation

[0031] 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.

[0032] Example 1 like Figures 1-6As shown, a light source system includes a first light source assembly 100, a second light source assembly 200, and a partitioned light combining element 1. Both the first light source assembly 100 and the second light source assembly 200 include a first light-emitting unit 2, a second light-emitting unit 3, and a light combining component. The first light-emitting unit 2 and the second light-emitting unit 3 both emit a first laser and a second laser. The polarization states of the first laser emitted from different light-emitting units are different, and / or the polarization states of the emitted second laser are different, referred to as the first polarization state and the second polarization state. The light combining component includes a polarization light combining component 1, which reflects light of the first polarization state and transmits light of the second polarization state, and / or reflects light of the second polarization state... The first polarization light-emitting component 1 transmits light in a first polarization state, and the polarization light-combining component 1 polarizes and combines the first laser emitted from different light-emitting units and / or the second laser emitted from different light-emitting units. The partitioned light-combining element 1 includes a first light-combining region and a second light-combining region. The first light-combining region reflects the first laser and transmits the second laser, and the second light-combining region reflects the second laser and transmits the first laser. One of the first light-combining region and the second light-combining region combines and outputs the spectra of the first laser emitted from the first light source component 100 and the second laser emitted from the second light source component 200, and the other combines and outputs the spectra of the second laser emitted from the first light source component 100 and the first laser emitted from the first light source component 100. In this embodiment, the first light source component 100 emits light along a second direction, and the second light source component 200 emits light along a third direction. The second direction and the third direction are parallel and opposite. In any light source component of this embodiment, the first light-emitting unit 2 and the second light-emitting unit 3 are arranged along a first direction, which is perpendicular to the second direction. The partitioned light-combining element 1 emits light along the first direction, which can effectively optimize the overall volume of the light source system.

[0033] It should be noted that in other embodiments, the first light-combining region reflects the second laser and transmits the first laser, and the second light-combining region 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 and the second light-combining region are opposite to meet the purpose of light-combining emission. This embodiment only describes one type of transmission and reflection characteristic. The setting method of the optical system based on other transmission and reflection characteristics is similar to this embodiment, and will not be described in detail here.

[0034] In the first light source assembly 100 and the second light source assembly 200, the first laser beam emitted from the first light-emitting unit 2 and the second light-emitting unit 3 of either one has the same or different polarization states. In one embodiment, before the first laser beam from the first light-emitting unit 2 and the first laser beam from the second light-emitting unit 3 are incident on the polarization combining component, the two first laser beams emitted from different light-emitting units have different polarization states, so that the polarization combining component can combine the first laser beams in the same light source assembly. Therefore, in different embodiments, the polarization combining component can achieve polarization combining and emission of the first laser beam and / or the second laser beam from the same light source assembly.

[0035] like Figure 1 , Figure 4 and Figure 5 As shown, in this embodiment, both the first light-emitting unit 2 and the second light-emitting unit 3 include a first light-emitting subunit 4 and a second light-emitting subunit 5. The first light-emitting subunit 4 is used to emit a first laser beam, and the second light-emitting subunit 5 is used to emit a second laser beam. The first laser beam includes a first sub-beam and a second sub-beam. The first light-emitting subunit 4 includes a first light-emitting part 6 and a second light-emitting part 7. The first light-emitting part 6 has multiple light-emitting elements a arranged along a fourth direction to emit the first sub-beam, and the second light-emitting part 7 has multiple light-emitting elements b arranged along a fourth direction to emit the second sub-beam. The multiple light-emitting elements a and b are arranged in a row. The second light-emitting subunit 5 includes a third light-emitting part 8. The third light-emitting part 8 has multiple light-emitting elements c arranged along a fourth direction to emit the second laser beam. The first laser beam and the second laser beam have different colors and different polarization states. The first sub-beam and the second sub-beam have different colors and the same polarization state. The row of first light-emitting parts 6 and second light-emitting parts 7 are aligned with the row of third light-emitting parts 8 at intervals in a first direction. The first direction, the third direction, and the fourth direction are perpendicular to each other.

[0036] In this embodiment, the first sub-light is a green laser, the second sub-light is a blue laser, and the third laser is a red laser. For the aforementioned light-emitting elements a, b, and c, the polarization state of the emitted laser can directly meet the requirements for polarization combining. Alternatively, a polarization conversion element 10 can be provided on the light-emitting side to convert the initial polarization state of the laser, thereby meeting the requirements for polarization combining. In this embodiment, the polarization combining component one includes a polarization combining element one 11 and a polarization combining element two 12. Depending on the actual situation, the polarization combining element one 11 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, similarly to the polarization combining element two 12. Similar to the partitioned combining element one 1, the polarization combining component one can be configured as a combining element with partitioned coating. The principle is the same as that of the partitioned combining element one 1, the only difference being that one performs spectral combining and the other polarization combining, which will not be elaborated here. As an optional implementation, the first light source component 100 is used as an example for explanation. Figure 2 As shown, in the first direction, from top to bottom, the following are arranged: the second light-emitting sub-unit 5 of the first light-emitting unit 2, the first light-emitting sub-unit 4 of the first light-emitting unit 2, the second light-emitting sub-unit 5 of the second light-emitting unit 3, and the first light-emitting sub-unit 4 of the second light-emitting unit 3. These four light-emitting sub-units correspondingly emit a second laser beam with a second polarization state, a first sub-light beam and a second sub-light beam (first laser beam) with a first polarization state, and a second laser beam with a first polarization state, and a first sub-light beam and a second sub-light beam (first laser beam). The polarization combining element 11 reflects the light with the first polarization state and transmits the light with the second polarization state, and the polarization combining element 12 reflects the light with the second polarization state and transmits the light with the first polarization state, thus satisfying the requirements for polarization combining. For example... Figure 3In one embodiment shown, the light-emitting element c of the first light-emitting unit 2 emits light in a second polarization state, and the light-emitting elements a and b of the first light-emitting unit 2 emit light in a first polarization state. The light-emitting element c of the second light-emitting unit 3 emits light in a second polarization state, and the light-emitting elements a and b of the second light-emitting unit 3 emit light in a first polarization state. Polarization conversion elements 10 are provided on the light-emitting side of the light-emitting element c of the first light-emitting unit 2 and the light-emitting elements a and b of the second light-emitting sub-unit 5. Therefore, the first light-emitting unit 2 emits a second laser beam in a first polarization state, and the second light-emitting unit 3 emits a first sub-light and a second sub-light in a second polarization state. The polarization combining element 11 reflects the light in a first polarization state and transmits the light in a second polarization state, and the polarization combining element 12 reflects the light in a first polarization state and transmits the light in a second polarization state. At this time, polarization combining light emission can also be achieved through the polarization combining element 11 and the polarization combining element 12. In the above architecture, the light combining component can be equipped with a reflector 13 to guide the optical path, thereby ensuring that the lasers emitted from polarization combining element 11 and polarization combining element 12 are emitted in the same direction. It should be noted that in this embodiment, the first polarization state is the S-state, and the second polarization state is the P-state.

[0037] Furthermore, in this embodiment, such as Figure 5 As shown, taking the first light-emitting unit 2 as an example, the first light-emitting subunit 4 includes 3 light-emitting elements a and 2 light-emitting elements b, and the second light-emitting unit 3 includes 5 light-emitting elements c. When aligned, the 5 light-emitting elements 9 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.

[0038] In another embodiment, the first light source assembly 100 is also used as an example for explanation, such as... Figure 6 As shown, the polarization states of the first laser and the second laser can be the same. The light-emitting elements 9 in the first light-emitting unit 2 and the second light-emitting unit 3 both emit lasers with the first polarization state. A polarization conversion element 10 is provided on the light-emitting side of the light-emitting element 9 in the second light-emitting unit 3. Thus, the first light-emitting unit 2 emits the first sub-light, the second sub-light, and the second laser with the first polarization state, while the second light-emitting unit 3 emits the first sub-light, the second sub-light, and the second laser with the second polarization state. The polarization combining element 11 reflects the light with the first polarization state and transmits the light with the second polarization state, and the polarization combining element 12 reflects the light with the first polarization state and transmits the light with the second polarization state. Therefore, the polarization combining of the corresponding lasers can also be achieved by using the polarization combining element 11 and the polarization combining element 12.

[0039] Therefore, this embodiment utilizes a polarization combining component to combine laser light of the first polarization state and laser light of the second polarization state, thereby reducing the spot size and optimizing and simplifying the design of the light source system based on a larger number of laser beams.

[0040] After the first light source component 100 and the second light source component 200 emit light, they are combined and emitted using a partitioned light combining element-1. The partitioned light combining element-1 is a partitioned coated light combining element. In this embodiment, the first light combining area reflects the first laser emitted by the first light source component 100 and transmits the second laser emitted by the second light source component 200, and the second light combining area reflects the second laser emitted by the first light source component 100 and transmits the first laser emitted by the second light source component 200.

[0041] Furthermore, in this embodiment, a guiding element 14 is also included. The guiding element 14 is disposed in the light output path of the first light source assembly 100 to form a guiding beam. The partitioned light combining element 1 is disposed in the light output path of the second light source assembly 200 and the light path of the guiding beam.

[0042] In this embodiment, a shaping element 15 is provided in the output optical path of the first laser and / or the second laser. Specifically, a shaping element 15 is provided in the optical path of the first laser of the first light source device and the first laser of the second light source device. The shaping element 15 is configured as a diffusion element. Generally, the spot size of the red laser is larger. Therefore, by providing a diffusion element in the optical path of the first laser, the size of the first and second sub-light spots finally emitted by the light source system is similar to or the same as the size of the emitted second laser spot, thereby improving the uniformity of color mixing and brightness. Since the spot sizes of the lasers of each color are similar or consistent, they can also be better matched with the size of subsequent optical components, which is beneficial to reducing the size of the entire optical system and improving the performance of the entire optical system.

[0043] like Figure 1 As shown, in this embodiment, the first light source component 100 and the second light source component 200 are misaligned in a first direction, which is perpendicular to the second direction. This satisfies the arrangement of optical components and avoids placement interference.

[0044] In this embodiment, a parallelogram-shaped reflector (not shown in the figure) is provided on the light-emitting side of the first light-emitting unit 2 and / or the second light-emitting unit 3.

[0045] Taking the first light-emitting unit 2 as an example, the parallelogram-shaped reflector has two sets of surfaces: one set consists of parallel surfaces 1 (bm1) and 2 (bm2), and the other set consists of parallel surfaces 3 (bm3) and 4 (bm4). Surfaces 1 (bm1) and 2 (bm2) are perpendicular to the incident laser, while surfaces 3 (bm3) and 4 (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 1 (bm1) with normal incidence. Figure 18 As shown, in one embodiment, after entering the parallelogram mirror, 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 mirror, while the blue laser, after entering the parallelogram mirror 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 mirror, 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 mirror, the blue spot is on the other side of the green spot. Figure 19 As 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 shifts to the other side of the green laser. In other words, after the green and blue lasers are emitted through the parallelogram reflector, 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 a parallelogram reflector, uniform color distribution can be achieved, thereby improving the uniformity of the image.

[0046] Example 2 This embodiment differs from the embodiments described above in its architecture. Specifically, as follows: Figure 8As shown, in the same light source assembly, the arrangement directions of the first light-emitting part 6 and the second light-emitting part 7 of the first light-emitting unit 2 are opposite to those of the first light-emitting part 6 and the second light-emitting part 7 of the second light-emitting unit 3. It is known that for schemes using different polarization states for light combining, although the final light spot is reduced, there is a drawback of increased polarization loss. Therefore, in order to balance the advantages and disadvantages of different optical architectures, in this embodiment, in any light source assembly, the first laser is emitted through spectral light combining, and the second laser is emitted through polarization light combining. Further, as... Figure 9 As shown, the light combining component further includes a second partitioned light combining element 16, disposed in the light output path of the first laser. The second partitioned light combining element 16 includes a third light combining region and a fourth light combining region. The third light combining region reflects the first sub-light and transmits the second sub-light, and the fourth light combining region reflects the second sub-light and transmits the first sub-light. The third light combining region combines the first sub-light emitted by the first light-emitting unit 2 and the second sub-light emitted by the second light-emitting unit 3 into a single spectrum for output. The fourth light combining region combines the second sub-light emitted by the first light-emitting unit 2 and the first sub-light emitted by the second light-emitting unit 3 into a single spectrum for output. The first polarization light combining component polarizes and combines the second laser emitted by different light-emitting units into a single spectrum for output. In this embodiment, the first polarization light combining component is a second polarization light combining element 12.

[0047] It should be noted that in other embodiments, the third light-combining region reflects the second sub-light and transmits the first sub-light, and the fourth light-combining region reflects the first sub-light and transmits the second sub-light. 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 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 repeated here. The first laser includes a first sub-light and a second sub-light. Therefore, when the arrangement directions of the first light-emitting part 6 and the second light-emitting part 7 of the first light-emitting unit 2 are opposite to those of the first light-emitting part 6 and the second light-emitting part 7 of the second light-emitting unit 3, the sub-light irradiated by the partitioned light-combining element 2 16 achieves partitioning, that is, the first sub-light of the first light-emitting unit 2 and the second sub-light of the second light-emitting unit 3 correspond to each other, and the second sub-light of the first light-emitting unit 2 and the first sub-light of the second light-emitting unit 3 correspond to each other. At this time, spectral light combination can be achieved by using the partitioned light-combining element 2 16, thus reducing the application of polarized light combination.

[0048] like Figure 11As shown, when using partitioned coating to achieve spectral combining, a certain width of bright edge appears in the coating. Because the spacing between the light-emitting elements 9 is relatively close, there are difficulties in the film design, inevitably leading to light efficiency loss. Based on this, in some technical solutions, laser cross-contamination may occur. Taking the first sub-beam of the second light-emitting unit 3 as an example, the preset optical path is for the first sub-beam of the second light-emitting unit 3 to enter the fourth combining region. However, due to various reasons, the first sub-beam of the second light-emitting unit 3 may enter the third combining region. The function of the third combining region is to reflect the first sub-beam and transmit the second sub-beam. This results in the first sub-beam of the second light-emitting unit 3 being unable to transmit, thus losing this portion of light, leading to a greater loss of light efficiency. Therefore, as... Figure 8 As shown, when the first light-emitting part 6 of the first light-emitting unit 2 and the second light-emitting part 7 of the second light-emitting unit 3 correspond to each other, and when the second light-emitting part 7 of the first light-emitting unit 2 and the first light-emitting part 6 of the second light-emitting unit 3 correspond to each other, the first sub-light emitted by the first light-emitting part 6 of the first light-emitting unit 2 and the second sub-light emitted by the second light-emitting part 7 of the second light-emitting unit 3 fall into the same light-combining area, and at the same time, the second sub-light emitted by the second light-emitting part 7 of the first light-emitting unit 2 and the first sub-light emitted by the first light-emitting part 6 of the first light-emitting unit 3 fall into the same light-combining area, thereby minimizing the loss of light effect.

[0049] In order to better optimize the architecture of the light source system, one of the first light-emitting unit 2 and the second light-emitting unit 3 of the first light source component 100 is aligned with the first light-emitting unit 2 of the second light source component 200, and the other is aligned with the second light-emitting unit 3 of the second light source component 200. It should be noted that, in order to ensure the light combining effect of the second light combining element 16, the first light-emitting unit 2 and the second light-emitting unit 3 are misaligned along the fourth direction in the same light source assembly, so that the first sub-light emitted by the first light-emitting part 6 of the first light-emitting unit 2 and the second sub-light emitted by the second light-emitting part 7 of the second light-emitting unit 3 fall in the same light combining area, and at the same time, the second sub-light emitted by the second light-emitting part 7 of the first light-emitting unit 2 and the first sub-light emitted by the first light-emitting part 6 of the first light-emitting unit 3 fall in the same light combining area. It should also be noted that the misalignment along the fourth direction is based on the structure of the first light-emitting unit 2 and the second light-emitting unit 3. In fact, the first light-emitting unit 2 and the second light-emitting unit 3 have the same configuration structure. Except for the arrangement of the light-emitting element 9, they have the same power terminals. Therefore, based on the fact that the first light-emitting unit 2 and the second light-emitting unit 3 have the same structure, when arranging the first light-emitting unit 2 and the second light-emitting unit 3, they can be made to be centrally symmetrical, which also facilitates power connection.

[0050] Similar to Embodiment 1, a parallelogram-shaped reflector is provided in this embodiment. The parallelogram-shaped reflector can adjust the position of the light spot without changing the direction of beam propagation. In other words, the position of the light spot can be controlled by the parallelogram-shaped reflector, and the light spot can be aligned on the beam combining surface. This eliminates the bright edge caused by the misalignment of the light spot and reduces or suppresses the bright edge of the coating in the spectral beam combining process. In other words, the optical path is optimized by using the parallelogram-shaped reflector, which reduces the distance between the green laser (first sub-beam) and the blue laser (second sub-beam), improves the beam combining efficiency, and thus compensates for material defects.

[0051] Example 3 This embodiment can arrange more light source components to further improve brightness. Specifically, such as... Figure 12 As shown, it also includes a third light source assembly 300, which includes a third light-emitting unit 17 and a fourth light-emitting unit 18, and a spectral combining assembly. The third light-emitting unit 17 and the fourth light-emitting unit 18 both emit a third laser and a fourth laser, respectively, and the third and fourth lasers are of different colors. The spectral combining assembly includes a first spectral combining section 19 and a second spectral combining section 20. The first spectral combining section 19 reflects the third laser and transmits the fourth laser, while the second spectral combining section 20 reflects the fourth laser and transmits the third laser. One of the first spectral combining section 19 and the second spectral combining section 20 combines the third light-emitting unit 17 with the fourth laser. The third laser emitted by unit 17 and the fourth laser emitted by unit 18 are combined and emitted. Alternatively, one of the two spectral combining units 19 and 20 can combine the third laser emitted by unit 17 and the fourth laser emitted by unit 18, and the other can combine the third laser emitted by unit 18 and the fourth laser emitted by unit 18. The light emitted by the spectral combining assembly is in the same direction as the light emitted by the partitioned combining element 1. The spectral combining elements 19 and 20 can be two independent spectral combining elements, or they can be configured as a partitioned coated spectral combining element 1. A reflector 13 can also be provided in the optical paths of the third and fourth lasers to ensure that the lasers emitted from the spectral combining elements 19 and 20 are emitted in the same direction.

[0052] In this embodiment, the third light-emitting unit 17 and the fourth light-emitting unit 18 have the same light-emitting element 9 arrangement as the first light-emitting unit 2 and the second light-emitting unit 3. In addition, the third light-emitting unit 17 and the fourth light-emitting unit 18 in this embodiment also emit a first sub-light, a second sub-light and a second laser, wherein the third laser is a mixture of the first sub-light (green laser) and the second sub-light (blue laser) and the fourth laser is a red laser.

[0053] like Figure 1 As shown, in this embodiment, the first light-emitting unit 2 and the second light-emitting unit 3 of the first light source assembly 100 are arranged side by side on the first light-emitting plane, and the first light-emitting unit 2 and the second light-emitting unit 3 of the second light source assembly 200 are arranged side by side on the second light-emitting plane. The first light-emitting plane and the second light-emitting plane are parallel, and the light emitted from the first light-emitting plane is parallel and opposite to the light emitted from the second light-emitting plane. In different embodiments of this embodiment, the third light-emitting unit 17 and the fourth light-emitting unit 18 have different placement methods.

[0054] like Figure 12 , Figure 13 As shown, in one embodiment, the third light-emitting unit 17 and the fourth light-emitting unit 18 are arranged on a third light-emitting plane, and the light emitted from the third light-emitting plane is perpendicular to the light emitted from the first light-emitting plane. The first spectral combining section 19 reflects the fourth laser emitted from the fourth light-emitting unit 18 and transmits the third laser emitted from the third light-emitting unit 17, and the second spectral combining section 20 reflects the third laser emitted from the fourth light-emitting unit 18 and transmits the fourth laser emitted from the third light-emitting unit 17.

[0055] like Figure 14 As shown, in another embodiment, one of the third light-emitting unit 17 and the fourth light-emitting unit 18 is arranged on the first light-emitting plane, and the other is arranged on the second light-emitting plane. Figure 15 As shown, the first spectral combining section 19 reflects the fourth laser emitted from the third light-emitting unit 17 and transmits the third laser emitted from the third light-emitting unit 17, while the second spectral combining section 20 reflects the third laser emitted from the fourth light-emitting unit 18 and transmits the fourth laser emitted from the fourth light-emitting unit 18. In this embodiment, the third light-emitting unit 17 and the fourth light-emitting unit 18 are misaligned in the light-emitting direction (first direction) of the partitioned combining element 1. This structure facilitates the arrangement of optical components and avoids interference. Figure 10 As shown, although the final emitted light spot of the light source system will become larger, which makes it more difficult to match the size of subsequent optical components, overall, it still greatly improves the size matching difficulty of subsequent optical components compared with the existing technology. Therefore, while reducing polarization and light combination loss, it also meets the requirements of lightweighting and miniaturization.

[0056] As can be seen, in different embodiments, when the reflection and transmission characteristics of the first spectral combining section 19 and the second spectral combining section 20 are opposite, the purpose of light combining and emission can be satisfied. The above embodiments are only specifically described based on one type of transmission and reflection characteristics. The arrangement of optical systems based on other transmission and reflection characteristics is similar to the corresponding embodiments, and will not be described again here.

[0057] In this embodiment, a shaping element 21 is provided in the output optical path of the third laser and / or the fourth laser. Specifically, the shaping element 21 is provided in the optical path of the third laser, and the shaping element 21 is configured as a diffusion element. It should be noted that the shaping element 15 and the shaping element 21 can be used alone or in combination. Referring to Embodiments 1 and 3, as... Figure 7 As shown, the size of the first and second sub-light beams emitted by the light source system is similar to or the same as the size of the emitted red laser beam, thereby improving the uniformity of color mixing and brightness. Since the beam sizes of each color laser are similar or the same, they can also be better matched with the size of subsequent optical components, which helps to reduce the size of the entire optical system and improve the performance of the entire optical system.

[0058] In this embodiment, a parallelogram-shaped reflector is provided on the light-emitting side of the third light-emitting unit 17 and / or the fourth light-emitting unit 18. This also reduces the distance between the blue laser and the green laser, thereby improving the light combining efficiency.

[0059] Example 4 This embodiment achieves light output from the third light source component 300 through polarized light combining. Although polarization loss increases, the advantages are a smaller light spot and a better-designed light combining system. Specifically, such as... Figure 16As shown, it also includes a third light source assembly 300, which includes a third light-emitting unit 17, a fourth light-emitting unit 18, and a second polarization combining assembly; the second polarization combining assembly includes a third polarization combining element 22 and a fourth polarization combining element 23; both the third light-emitting unit 17 and the fourth light-emitting unit 18 emit a third laser and a fourth laser, respectively, and the polarization states of the emitted third laser and / or the emitted fourth laser are different between different light-emitting units, the different polarization states being a first polarization state and a second polarization state; the third polarization combining element 22 reflects light of one of the first polarization state and the second polarization state while transmitting light of the other polarization state, and the fourth polarization combining element 23 reflects light of the first polarization state and the second polarization state. Light of one polarization state is transmitted through the other polarization state. One of the polarization combining elements 22 and 23 outputs the third laser emitted by the third light-emitting unit 17 and the third laser emitted by the fourth light-emitting unit 18, while the other outputs the fourth laser emitted by the third light-emitting unit 17 and the fourth laser emitted by the fourth light-emitting unit 18. The system also includes a spectral combining component, which reflects the third laser and transmits the fourth laser, or reflects the fourth laser and transmits the third laser. The spectral combining component spectrally combines the third and fourth lasers emitted by the polarization combining component and outputs the combined light. The light emitted by the spectral combining component is in the same direction as the light emitted by the partitioned combining element 1. In this embodiment, the polarization combining elements 22 and 23 can be two separate optical components, or they can be a region on a single optical component with partitioned coating.

[0060] In this embodiment, the third light-emitting unit 17 and the fourth light-emitting unit 18 also include a light-emitting element 9, or a light-emitting element 9 and a polarization conversion element 10 disposed on the light-emitting side of the light-emitting element 9, thereby enabling the polarization combining element 22 and the polarization combining element 23 to achieve polarization-combined light emission of the laser. Specifically, the polarization combining element 22 reflects the third laser of the first polarization state emitted by the fourth light-emitting unit 18 and transmits the third laser of the second polarization state emitted by the third light-emitting unit 17, and the polarization combining element 23 reflects the fourth laser of the second polarization state emitted by the fourth light-emitting unit 18 and transmits the fourth laser of the first polarization state emitted by the third light-emitting unit 17. After the polarization combining elements 22 and 23 combine and emit light beams, since the third laser and the fourth laser have different colors, they can be emitted using spectral combining components. In this embodiment, the spectral combining component reflects the third laser and transmits the fourth laser. Based on this, a corresponding reflector 13 can be set to realize the optical path reversal of the polarized third laser to illuminate the spectral combining component. In this embodiment, the spectral combining component is configured as spectral combining element 24.

[0061] It should be noted that in other embodiments, the polarization combining element 3 22 reflects light of the second polarization state and transmits light of the first polarization state, and the polarization combining element 4 23 reflects light of the first polarization state and transmits light of the second polarization state. That is to say, in different embodiments, the reflection and transmission characteristics of polarization combining element 3 22 and polarization combining element 4 23 are opposite to meet the purpose of light combining and emission. This embodiment only describes one type of transmission and reflection characteristic. The setting method of optical system based on other transmission and reflection characteristics is similar to this embodiment, and will not be described in detail here.

[0062] Combining Examples 1 and 4, such as Figure 17 As shown, the same technical effect can be achieved by making the spot size of lasers of different colors similar or consistent.

[0063] The light source systems described in Embodiments 1 to 4 can all be used in projection devices. In addition to 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 (projection lens) 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.

[0064] 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 and the second light source assembly each include a first light-emitting unit, a second light-emitting unit, and a light-combining component; the first light-emitting unit and the second light-emitting unit each emit a first laser and a second laser, and the polarization state of the first laser emitted by different light-emitting units is different and / or the polarization state of the second laser emitted is different, the different polarization states being the first polarization state and the second polarization state; The light combining component includes a polarization light combining component one, which reflects light of a first polarization state and transmits light of a second polarization state, and / or reflects light of a second polarization state and transmits light of a first polarization state. The polarization light combining component one polarizes and combines the first laser emitted from different light-emitting units and / or the second laser emitted from different light-emitting units into a single output. It also includes a partitioned light combining element, which 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 source component and the second laser emitted by the first light source component and emits them together. The other region combines the spectra of the second laser emitted by the first light source component and the first laser emitted by the first light source component and emits them together.

2. The light source system as described in claim 1, characterized in that, Each of the first light-emitting unit and the second light-emitting unit includes a first light-emitting subunit and a second light-emitting subunit. The first light-emitting subunit is used to emit a first laser beam, and the second light-emitting subunit is used to emit a second laser beam. The first laser beam includes a first sub-beam and a second sub-beam. The first light-emitting subunit includes a first light-emitting part and a second light-emitting part. The first light-emitting part has a plurality of light-emitting elements a arranged along the fourth direction to emit a first sub-light. The second light-emitting part has a plurality of light-emitting elements b arranged along the fourth direction to emit a second sub-light. The plurality of light-emitting elements a and the plurality of light-emitting elements b are arranged in a row. The second light-emitting subunit includes a third light-emitting part, wherein a plurality of light-emitting elements c are arranged along the fourth direction to emit a second laser beam; Among them, the first laser and the second laser have different colors and different polarization states; the first sub-light and the second sub-light have different colors but the same polarization state. The first and second light-emitting parts, arranged in a row, are aligned with the third light-emitting part at intervals in a first direction; The first direction, the third direction, and the fourth direction are perpendicular to each other.

3. The light source system as described in claim 2, characterized in that, In the same light source assembly, the arrangement direction of the first light-emitting part and the second light-emitting part of the first light-emitting unit is opposite to the arrangement direction of the first light-emitting part and the second light-emitting part of the second light-emitting unit; The light combining component further includes a second partitioned light combining element, which is disposed in the light output path of the first laser. The second partitioned light combining element 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 sub-light and transmits the second sub-light, while the other reflects the second sub-light and transmits the first sub-light. One of the third light combining region and the fourth light combining region performs a spectral combination of the first sub-light emitted by the first light-emitting unit and the second sub-light emitted by the second light-emitting unit, while the other performs a spectral combination of the second sub-light emitted by the first light-emitting unit and the first sub-light emitted by the second light-emitting unit. The polarization combining component 1 outputs polarized light from the second laser emitted by different light-emitting units.

4. A light source system as described in claim 1, characterized in that, In any light source assembly, the first light-emitting unit and the second light-emitting unit are arranged along a first direction, which is perpendicular to the second direction; The partitioned light combining element emits light along a first direction.

5. A light source system as described in claim 1, characterized in that, The first light source assembly and the second light source assembly are misaligned in a first direction, which is perpendicular to the second direction; Alternatively, one of the first light-emitting unit and the second light-emitting unit of the first light source assembly is aligned with the first light-emitting unit of the second light source assembly, and the other is aligned with the second light-emitting unit of the second light source assembly. Wherein, the first light source component emits light along the second direction, and the second light source component emits light along the third direction, wherein the second direction and the third direction are parallel and opposite.

6. A light source system as described in claim 1, characterized in that, Both the first light-emitting unit and the second light-emitting unit include: Light-emitting elements used to emit laser light; Alternatively, a light-emitting element for emitting laser light, and a polarization conversion element disposed on the light-emitting side of the light-emitting element; The laser emitted by the light-emitting element is either in a first polarization state or a second polarization state.

7. A light source system as described in any one of claims 1 to 6, characterized in that, It also includes a third light source assembly, which includes a third light-emitting unit, a fourth light-emitting unit, and a spectral combining component. The third light-emitting unit and the fourth light-emitting unit both emit a third laser and a fourth laser, respectively, and the third laser and the fourth laser are of different colors. The spectral combining component includes a spectral combining section one and a spectral combining section two. One of the spectral combining sections one and two reflects a third laser and transmits a fourth laser, while the other reflects a fourth laser and transmits a third laser. One of the spectral combining sections one and two emits a spectrally combined light from the third laser emitted by the third light-emitting unit and the fourth laser emitted by the fourth light-emitting unit, while the other emits a spectrally combined light from the fourth laser emitted by the third light-emitting unit and the third laser emitted by the fourth light-emitting unit. Alternatively, one of the spectral combining sections one and two emits a spectrally combined light from the third laser emitted by the third light-emitting unit and the fourth laser emitted by the third light-emitting unit, while the other emits a spectrally combined light from the third laser emitted by the fourth light-emitting unit and the fourth laser emitted by the fourth light-emitting unit. The light emitted by the spectral combining component is in the same direction as the light emitted by the partitioned combining element; or It also includes a third light source assembly, which includes a third light-emitting unit, a fourth light-emitting unit, and a second polarization combining component; the second polarization combining component includes a third polarization combining element and a fourth polarization combining element; both the third light-emitting unit and the fourth light-emitting unit emit third laser and fourth laser, respectively, and the polarization states of the third laser emitted by different light-emitting units are different and / or the polarization states of the fourth laser emitted are different, and the different polarization states are a first polarization state and a second polarization state; The third 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 fourth 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. One of the polarization combining elements three and four emits a third laser emitted by the third light-emitting unit and a third laser emitted by the fourth light-emitting unit. The other polarization combining element emits a fourth laser emitted by the third light-emitting unit and a fourth laser emitted by the fourth light-emitting unit.

8. A light source system as described in claim 7, characterized in that, When the third laser and the fourth laser are emitted through the polarization combining component, the system also includes a spectral combining component. The spectral combining component reflects the third laser and transmits the fourth laser, or reflects the fourth laser and transmits the third laser. The spectral combining component spectrally combines the emitted third laser and the fourth laser and emits the polarization combined light. The light emitted by the spectral combining component is in the same direction as the light emitted by the partitioned combining element.

9. A light source system as described in claim 7, characterized in that, The first light-emitting unit and the second light-emitting unit of the first light source assembly are arranged side by side on the first light-emitting plane, and the first light-emitting unit and the second light-emitting unit of the second light source assembly are arranged side by side on the second light-emitting plane. The first light-emitting plane and the second light-emitting plane are parallel, and the light emitted from the first light-emitting plane is parallel and opposite to the light emitted from the second light-emitting plane. The third and fourth light-emitting units are arranged on the third light-emitting plane, and the light emitted from the third light-emitting plane is perpendicular to the light emitted from the first light-emitting plane; or, one of the third and fourth light-emitting units is arranged on the first light-emitting plane, and the other is arranged on the second light-emitting plane.

10. A light source system as described in claim 9, characterized in that, When one of the third light-emitting unit and the fourth light-emitting unit is arranged on the first light-emitting plane and the other is arranged on the second light-emitting plane, the third light-emitting unit and the fourth light-emitting unit are misaligned in the light-emitting direction of the partitioned light-combining element.

11. A light source system as described in any one of claims 1 to 6, characterized in that, A shaping element is provided in the output optical path of the first laser and / or the second laser.

12. A light source system as described in claim 7, characterized in that, A shaping element 2 is provided in the output optical path of the third laser and / or the fourth laser.

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