WO2022037417A1

WO2022037417A1 - Light source system

Info

Publication number: WO2022037417A1
Application number: PCT/CN2021/110774
Authority: WO
Inventors: 陈彦哲; 郭祖强; 杜鹏; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2020-08-21
Filing date: 2021-08-05
Publication date: 2022-02-24
Also published as: CN114077138A

Abstract

A light source system (100), comprising a first light source (1), a second light source (2), a first light guide element (3), and a first beam combining element (4). The first and second light sources (1, 2) respectively comprise a plurality of lasers; the first light source (1) and the second light source (2) are provided respectively in a first direction (X) and a second direction (Y) in a staggered manner, and the first direction (X) is perpendicular to the second direction (Y). The first light source (1) emits a first beam group (110), and the first beam group (110) comprises a plurality of first laser beams; the first light guide element (3) guides the first beam group to the first beam combining element (4); the second light source (2) emits a second beam group (210), and the second beam group (210) comprises a plurality of second laser beams; the first beam combining element (4) transmits the first beam group (110) and reflects the second beam group (210) to form first combined light. In the first combined light, a plurality of first and second beam groups (110, 210) are alternately intercalated in the first direction (X), the plurality of first and second laser beams are alternately intercalated in a third direction (Y'), and the first direction (X) is perpendicular to the third direction (Y').

Description

Light source system

【Technical field】

The invention relates to the field of projection display, in particular to a light source system.

【Background technique】

In real life, the application of projection equipment is more and more extensive. In order to ensure good projection and viewing effects, it is necessary to correct the projection screen of the projection device.

In the related art, the light source system adds red, green, blue and other pure lasers and fluorescence combined light to improve the system efficiency and color gamut. The combined method of fluorescence and laser light is to add a regional coating lens before the uniform light device for extended light combining. , in order not to lose energy, the angle of the laser must be close to that of the fluorescence at the combined light. Therefore, the area of the region is determined by the elongation of the pure laser. When the elongation of the pure laser is larger, the region is larger, and the fluorescence loss will increase; The pure laser is composed of multiple lasers, and the diffusion angle of a single laser is very small. In order to obtain a small spot in the area, it is necessary to perform a face angle conversion before the area, so that the angular distribution becomes a surface distribution, and the original surface distribution becomes an angle distribution, it is necessary to perform a face angle conversion before the area, resulting in the angle distribution of the incident square bar is some discrete points.

However, in the related art, due to the small spot of a single laser, the angular distribution of the entering square rod is discontinuous, resulting in poor uniform light effect; in addition, since the pure laser is combined by splicing, this method increases the The expansion amount leads to larger area coating, more fluorescence loss, and low energy utilization efficiency.

Therefore, it is necessary to provide a new light source system to solve the above technical problems.

[Content of the invention]

The purpose of the present invention is to provide a light source system with good uniform light effect, small expansion and high energy utilization rate.

In order to achieve the above object, the present invention provides a light source system, which includes a first light source, a second light source, a first light guide element and a first light combining element; the first light source and the second light source respectively include a plurality of a laser, the first light source and the second light source are respectively staggered along a first direction and a second direction, the first direction and the second direction are perpendicular; the first light guide element and the first The light sources are arranged opposite to each other, and the first light combining element is respectively arranged opposite to the second light source and the first light guide element;

The first light source is used to emit a plurality of first light beam groups directed towards the first light guide element, and the first light beam group includes a plurality of first lasers respectively emitted by the plurality of lasers of the first light source bundle;

The first light guide element is used for guiding the first light beam group to the first light combining element; the second light source is used for emitting a second light beam group directed to the first light combining element, so the The second beam group includes a plurality of second laser beams respectively emitted by a plurality of lasers of the second light source; the first light combining element is used for transmitting the first beam group and reflecting the second beam group , so as to combine the first beam group and the second beam group to form a first combined light; a plurality of the first beam groups and a plurality of the second beam groups in the first combined light The first direction is alternately inserted and arranged in turn, and the plurality of the first laser beams and the plurality of the second laser beams in the first combined light are arranged alternately and alternately along the third direction. perpendicular to the third direction.

Preferably, the first light-guiding element and the first light-combining element are arranged at intervals along the second direction in a staggered manner.

Preferably, the first light guide element and the first light combining element are mutually displaced along the first direction, and the first light guide element and the first light combining element are arranged in the first direction. The dislocation distance therebetween is half of the center distance between the two adjacent lasers along the first direction.

Preferably, the projected size of the first light guide element perpendicular to the second direction is larger than the projected size of the first light combining element perpendicular to the second direction, or the first light guide element is perpendicular to the second direction. The projected size of the second direction is smaller than the projected size of the first light combining element perpendicular to the second direction.

Preferably, the dislocation distance between the first light source and the second light source in the first direction is half of the center distance between the two adjacent lasers along the first direction, so The dislocation distance between the first light source and the second light source in the second direction is half of the center distance between the two adjacent lasers along the second direction.

Preferably, the light source system further includes a first half-wave plate disposed between the first light source and the first light guide element, and the laser light emitted by the laser of the first light source passes through the first half-wave The sheet realizes polarization state conversion to form the first laser beam; the first laser beam is P-polarized light, and the second laser beam is S-polarized light.

Preferably, the light source system further includes a third light source, a fourth light source, a second light guide element and a second light combining element;

The third light source and the fourth light source respectively comprise a plurality of lasers, and the third light source and the fourth light source are respectively dislocated along the first direction and the second direction; the second light guide The elements are respectively arranged opposite to the third laser and the first light combining element, and the second light combining element is arranged opposite to the fourth light source and opposite to the third light guide element;

The third light source is used for emitting a plurality of third beam groups directed towards the second light guide element, and the third beam group includes a plurality of third lasers respectively emitted by the plurality of lasers of the third light source The second light guide element is used to guide the third light beam group to the second light combining element; the fourth light source is used to emit a fourth light beam group that is directed to the second light combining element , the fourth beam group includes a plurality of fourth laser beams respectively emitted by a plurality of lasers of the fourth light source; the second light combining element is used for transmitting the third beam group and reflecting the fourth laser beam a beam group, so as to combine the third beam group and the fourth beam to form a second beam combination; a plurality of the third beam groups and a plurality of the fourth beam groups in the second beam combination The plurality of third laser beams and the plurality of the fourth laser beams in the second combined light are arranged alternately and alternately along the third direction; the The first combined light passes through the second light guide element and the second light combining element in turn, and the first combined light and the second combined light fill the gap between the laser beams of each other to form Outgoing combined light.

Preferably, the second light-guiding element and the second light-combining element are arranged at intervals along the second direction staggered from each other.

Preferably, the second light guide element and the second light combining element are mutually offset along the first direction, and the second light guide element and the second light combining element are arranged in the first direction The dislocation distance therebetween is half of the center distance between the two adjacent lasers along the first direction.

Preferably, the projected size of the second light guide element perpendicular to the second direction is larger than the projected size of the second light combining element perpendicular to the second direction, or the second light guide element is perpendicular to the second direction. The projected size of the second direction is smaller than the projected size of the second light combining element perpendicular to the second direction.

Preferably, the dislocation distance between the third light source and the fourth light source in the first direction is half of the center distance between the two adjacent lasers along the first direction, so The dislocation distance between the third light source and the fourth light source in the second direction is half of the center distance between the two adjacent lasers along the second direction.

Preferably, the light source system further includes a second half-wave plate disposed between the third light source and the second light guide element, and a second half-wave plate disposed between the fourth light source and the second light combining element The third half-wave plate, the laser light emitted by the plurality of third light sources respectively realizes polarization state transformation through the second half-wave plate to form the third laser beam, the laser light emitted by the plurality of fourth light sources is respectively The polarization state conversion is realized by the third half-wave plate to form the fourth laser beam; both the first laser beam and the second laser beam are P-polarized light, and the third laser beam and the third laser beam are P-polarized light. The four laser beams are all S-polarized light.

Preferably, the first light combining element includes a plurality of first reflection regions and a plurality of first transmission regions, the first reflection regions and the first transmission regions are arranged alternately in sequence, and the first reflection regions are used for Reflecting the second beam group, the first transmission area is used to transmit the first beam group; the second light combining element includes a plurality of second reflection areas and a plurality of second transmission areas, the second The reflection area and the transmission area are arranged alternately in sequence, the second reflection area is used to reflect the fourth beam group and transmit the first beam group and the second beam group, and the second transmission area is used to transmit all the beams. the first beam group, the second beam group and the third beam group.

Compared with the related art, in the light source system of the present invention, the first light source and the second light source are respectively staggered along the first direction and the second direction, and the first direction and the second direction are perpendicular, so that the first light source emitted by the first light source is The beam group and the second beam group emitted by the second light source are combined by the first light combining element to obtain a first combined light, and the multiple first beam groups and the multiple second beam groups in the first combined light are along the first direction. Alternately inserted slits are arranged in turn, a plurality of first laser beams and a plurality of second laser beams in the first combined light are alternately inserted and arranged in turn along a third direction, the first direction and the third direction are perpendicular, and the first and second laser beams obtained by the above-mentioned setting are arranged. The light spot distribution of the first combined light is continuous, which effectively improves the uniform light effect of the light source system; in addition, the combined light is processed by arranging slits along two different directions (ie, the first direction and the third direction) and polarizing the combined light. , so that the dilution of the expansion of the outgoing laser beam is small, effectively reducing the area of the regional coating, reducing the loss of fluorescence, and improving the efficiency of energy utilization.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

FIG. 1 is a schematic structural diagram of Embodiment 1 of a light source system according to the present invention;

FIG. 2 is a partial structural schematic diagram of Embodiment 1 of the light source system according to the present invention;

3 is a schematic diagram of the relative positions of the first light source and the second light source in Embodiment 1 of the light source system of the present invention;

4 is a schematic diagram of a light spot after the first beam group and the second beam combine light in Embodiment 1 of the light source system of the present invention;

5 is a schematic diagram of the illuminance distribution at the exit of the light source system of the present invention and the light source system of the related art after the light spot passes through the square rod;

FIG. 6 is a schematic structural diagram of Embodiment 2 of the light source system of the present invention;

7 is a schematic diagram of the relative positions of the first light source and the second light source in Embodiment 2 of the light source system of the present invention;

FIG. 8 is a schematic structural diagram of a first light combining element and a second light combining element in Embodiment 2 of the light source system of the present invention.

【detailed description】

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1

Referring to FIGS. 1-4 , the present invention provides a light source system 100 , which includes a first light source 1 , a second light source 2 , a first light guide element 3 , and a first light combining element 4 .

The first light source 1 includes a plurality of lasers, and the plurality of lasers of the first light source 1 are arranged and spaced apart from each other along the first direction (ie, the X-axis direction), and are arranged along the second direction (that is, the X-axis direction) perpendicular to the first direction. The first light source 1 is configured to emit a plurality of first light beam groups 110 directed towards the first light guide element 3, and the first light beam groups 110 include A plurality of first laser beams respectively emitted by a plurality of lasers of the first light source 1 .

The second light source 2 includes a plurality of lasers, and the plurality of lasers of the second light source 2 are arranged at intervals along the first direction and the second direction, respectively; the plurality of lasers of the second light source 2 and The plurality of lasers of the first light source 1 are arranged alternately and dislocated in sequence along the first direction and are arranged at a distance from each other. Two beam groups 210, the second beam group 210 includes a plurality of second laser beams respectively emitted by a plurality of lasers of the second light source 2, respectively.

It is worth mentioning that the laser is used to emit one of S-polarized light and P-polarized light. The polarized light emitted by the laser of the first light source 1 and the polarized light emitted by the laser of the second light source 2 may be the same or different, which can be selected according to the actual situation. In this embodiment, the lasers of the first light source 1 and the second light source 2 are both used to emit S-polarized light.

Further, the light source system 100 further includes a first half-wave plate 5 (ie, a half-wave plate) for changing the polarization state of the laser beam, and the first half-wave plate 5 is arranged on the first light source 1 and the first light guide element 3, the S-polarized light emitted by the lasers of each of the first light sources 1 passes through the first half-wave plate 5 to realize polarization state conversion to form P-polarized light. The light is used as the first laser beam, and the S-polarized light emitted by the laser of the second light source 2 is used as the second laser beam. Of course, as other implementations, it is also feasible that both the lasers of the first light source and the second light source are used to emit P-polarized light. In this case, it is necessary to set the first half-wave plate to emit the laser of the first light source or the laser of the second light source. Or, as another embodiment, one of the lasers of the first light source and the second light source emits S-polarized light, and the other one emits P-polarized light, and it is also feasible to set the first half-wave at this time. The plate undergoes a polarization state transition.

Here, it should be noted that the first direction is the height direction of the first light source 1 and the second light source 2, and the second direction is the first light source 1 and the second light source The length direction of The two directions realize the left and right staggered spaced arrangement, which provides conditions for the arrangement of the left and right insertion slits between the adjacent first laser beams and the second laser beams.

Further, the relative distance between the first light source and the second light source is not limited, and it is possible to adjust the dislocation distance between the first light source and the second light source along the first direction and the distance along the first light source according to the actual situation. The dislocation distance in two directions, for example, in this embodiment, as shown in FIG. 3 in detail, the dislocation distance H ₀ between the first light source 1 and the second light source 2 in the first direction is along the The center distance between the two adjacent laser edges in the first direction is half, and the dislocation distance L ₀ between the first light source 1 and the second light source 2 in the second direction is the edge. Half of the center distance between the two lasers adjacent in the second direction.

The first light guide element 3 is an optical mirror, which is disposed opposite to the first light source 1 at an interval, and the first light guide element 3 is used to guide the first beam group 110 to the first light combining Element 4.

The first light combining element 4 is a polarized coating mirror, which is respectively arranged at a distance from the second light source 2 and the first light guide element 3. Specifically, the first light combining element 4 can transmit P polarization. light, reflected S-polarized light, the first light combining element 4 is used to reflect the second beam group 210 composed of S-polarized light, and used to transmit the first beam group 110 composed of P-polarized light; of course , the first light combining element can also be specifically set according to the specific polarization states of the first laser beam and the second laser beam.

It is worth mentioning that the specific position setting between the first light guide element and the first light combining element is not limited. In this embodiment, the first light guide element 3 and the first light combining element 4 are mutually offset and spaced along the second direction.

As one of the embodiments, the first light guide element 3 and the first light combining element 4 are also mutually offset along the first direction, and the first light guide element 3 is in the first direction The dislocation distance from the first light combining element 4 is half of the center distance between the two adjacent lasers along the first direction.

As another embodiment, the projection size of the first light guide element 3 perpendicular to the second direction is smaller than the projection size of the first light combining element 4 perpendicular to the second direction. By setting the relative position between the two, there is no need to consider the dislocation problem in the first direction. In this embodiment, the first light beam group 110 is reflected to the first light combining element 4 through the first light guide element 3 , and the first light combining element 4 reflects the second light beam group 210 and The first beam group 110 is transmitted to combine the first beam group 110 and the second beam group 210 to form a first combined light. A beam group 110 and a plurality of the second beam groups 210 are respectively arranged alternately along the first direction, and the plurality of the first laser beams and the plurality of the first laser beams in the first combined beam The two laser beams are arranged alternately along the third direction (the third direction is perpendicular to the first direction, that is, the direction of the Y' axis), so that a plurality of the first laser beams and a plurality of the second laser beams are arranged along the same direction. The first direction is to realize the setting of the upper and lower insertion slits and the setting of the left and right insertion slits along the third direction and to form the first combined light by polarization combination, and this first combined light is used as the outgoing combined light. 4, the first beam group 110 and the second beam group 210 are alternately arranged along the first direction, and there are four light spots on each of the first beam group 110 Respectively represent the light spots formed by the four first laser beams displaced from each other along the third direction, and the four light spots on each of the second beam groups 210 respectively represent the four light spots displaced from each other along the third direction. In the light spot formed by the set second laser beam, the light spot distribution of the first combined light is continuous, so that the light spot distribution of the first combined light is uniform, thereby improving the uniform light effect of the light source system 100 . Of course, in other embodiments, it is also feasible that the projection size of the first light guide element perpendicular to the second direction is larger than the projection size of the first light combining element perpendicular to the second direction.

More preferably, the light source system 100 further includes a scattering light guide component 6 , a scattering device 7 , an exit light guide component 8 and a square rod 9 .

The scattering light guide assembly 6 is used to guide the first combined light emitted by the first light combining element 4 to the scattering device 7; specifically, the scattering light guide assembly 6 includes a first lens 61 and a reflector 62 , the first lens 61 transmits the first combined light to the reflector 62 , and the reflector 62 reflects the first combined light to the scattering device 7 .

The scattering device 7 is a scattering wheel, and the scattering wheel is used to convert the face angle of the first combined light, and the light spot distribution of the first combined light after being scattered by the scattering device 7 is more uniform.

The exit lens group 8 guides the first combined light after the surface angle conversion to the square rod 9 to achieve outward exit; specifically, the exit lens group 8 includes a second lens 81, a third lens 82 and The area coating mirror 83, the first combined light after the surface angle conversion is transmitted from the second lens 81 and the third lens 82 to the area coating mirror 83 in turn, and the area coating mirror 83 reflects The first combined light after the face angle conversion transmits the external fluorescence 80, so that the first combined light and the external fluorescence 80 are combined, and the combined first combined light and the external fluorescence 80 are incident on the square rod 9 The uniform light is processed through the square rod 9 , and finally exits through the square rod 9 .

In the above structure, the distance between two adjacent lasers is defined as L. To make the light intensity at L/2 (ie) the same as that at L, according to the formula of Gaussian scattering:

P(θ)=P ₀ ×exp(0.5×(θ/σ) ² ),

where:

θ refers to the angle difference between the first and second laser beams after passing through the exit lens;

P(θ) refers to the light intensity after deviating from the center direction θ angle, with the increase of θ, P(θ) becomes smaller;

P ₀ refers to the light intensity in the center direction;

α refers to the scattering angle down to 50% of the central light intensity;

σ refers to the standard scattering angle, which is determined by the scattering angle of the scattering wheel, and is a fixed value for the same scattering wheel.

Assuming that the focal length of the first lens 61 is f, the angle difference between two adjacent lasers at the scattering device 7 is Δθ=arctan(0.5L/f). Equal to the strongest light intensity, there is Δθ/2=α, that is, the scattering angle α=0.5×arctan (0.5L/f). Assuming L=6mm and f=50mm, the scattering angle α=3.4° can be calculated. After using the upper, lower, left and right slits to set and combine the light, the distance becomes half of the original, L=3mm, so the scattering angle α=1.7°, which is half of the original. If the maximum angle of the entire light spot after laser combining is 9°, the polarized stitched light is not used, and the maximum angle of the light spot after passing through the scattering device 7 is about 12.4°, and the light spot of the polarized stitched light passes through the scattering The angle behind the device 7 is 10.7°, which saves about 25% of the expansion compared to the original solution. Therefore, the coating area of the regional coating mirror 83 can be reduced by about 25%, and the fluorescence utilization efficiency can be improved by 2-3%.

Refer to FIG. 5 at the same time, wherein, FIG. 5(a) is a schematic diagram of the exit illuminance distribution of the light spot of the light source system of the related art after passing through the square rod, that is, the illuminance distribution of the square rod exit of the light spot without polarization insertion and stitching light. Schematic diagram, the contrast ratio ((maximum illuminance-minimum illuminance)/average illuminance) of the light spot after the non-polarized stitching light is inserted is 0.67, and Fig. 5(b) is the exit illuminance distribution of the light spot of the light source system of the present invention after passing through the square bar The schematic diagram of , that is, a schematic diagram of the illuminance distribution at the exit of the square rod of the light spot through the upper, lower, left and right insertion slits and polarization combined light, the light spot contrast of the polarization inserted and combined light is 0.21, which is only 1/3 of the contrast of the original related technology, and the uniform light effect promote.

Therefore, in the above structure, the light combining process is performed by setting up, down, left, and right insertion slits and polarizing light combining. This structure is provided with a dilution amount that effectively reduces the expansion of the outgoing laser beam, so that the coating of the regional coating mirror 83 The area is reduced, thereby reducing the fluorescence loss and improving the energy utilization efficiency; in addition, since the first laser beam and the second laser beam have different polarization states, and both of them are scattered by the scattering wheel, it is beneficial to eliminate the first combined laser beam and the second laser beam. Speckle in light.

Embodiment 2

Referring to FIGS. 6-8 , the light source system 100 a of the second embodiment has the same structural parts as the light source system of the first embodiment, and the same parts will not be repeated here. The second light source system 100a is different from the partial expanded description of the light source system of the first embodiment:

The light source system 100a includes a first light source 1a, a second light source 2a, a third light source 3a, a fourth light source 4a, a first light guide element 5a, a first light combining element 6a, a second light guide element 7a, and a second combining element. Optical element 8a.

The first light source 1a includes a plurality of lasers, and the plurality of lasers of the first light source 1a are arranged at intervals along the first direction (ie, the X-axis direction), and are arranged at intervals along the second direction (ie, the Y-axis direction). , the first light source 1a is used to emit a plurality of first light beam groups 110a directed towards the first light guide element 5a, and the first light beam group 110a includes a plurality of lasers formed by the first light source 1a. A plurality of first laser beams are emitted.

The second light source 2a includes a plurality of lasers, and the plurality of lasers of the second light source 2a are arranged at intervals in the first direction and the second direction respectively; the plurality of lasers of the second light source 2a and the The plurality of laser groups of the first light source 1a are arranged alternately and displaced in sequence along the first direction and are spaced apart from each other. A beam group 210a, the second beam group 210a includes a plurality of second laser beams respectively emitted by a plurality of lasers of the second light source 2a, respectively.

The third light source 3a includes a plurality of lasers, and the plurality of third lasers of the third light source 3a are arranged at intervals along the first direction and the second direction, respectively, and the third light source 3a is used to emit multiple lasers. A third beam group 310a is directed toward the second light guide element 7a, and the third beam group 310a includes a plurality of third laser beams respectively emitted by a plurality of lasers of the third light source 3a.

The fourth light source 4a includes a plurality of lasers, and the plurality of fourth lasers of the fourth light source 4a are arranged alternately in the first direction and the second direction respectively; the plurality of fourth lasers of the fourth light source 4a The lasers and the plurality of third lasers of the third light source 3a are alternately arranged in sequence along the first direction, and the fourth light source 4a is used to emit a fourth beam group 410a that is directed to the second light combining element 8a , the fourth beam group 210a includes a plurality of fourth laser beams respectively emitted by the plurality of lasers of the fourth light source 4a.

Further, the relative distance between the first light source and the second light source is not limited, and it can be adjusted according to the actual situation. The distance of the left and right misalignment in the second direction, for example, in this embodiment, as shown in FIG. 7 in detail, the misalignment distance H ₀ between the first light source 1 a and the second light source 2 a in the first direction is half of the center distance between the two adjacent lasers along the first direction, the dislocation distance L ₀ between the first light source 1a and the second light source 2a in the second direction is half of the center distance between the two adjacent lasers along the second direction; the relative distance between the third light source and the fourth light source is also unlimited, and the third light source can be adjusted according to the actual situation The distance from the fourth light source up and down along the first direction and the left and right dislocation along the second direction. For example, in this embodiment, the third light source 3a is in the first direction with the The dislocation distance H1 between the fourth light sources 4a is half of the center distance between the two adjacent lasers along the _first direction, and the third light source 3a is in the second direction with The dislocation distance L ₁ between the fourth light sources 4a is half of the center distance between the two adjacent lasers along the second direction; it should be pointed out here that the above dislocation distance H ₀ can be Like the dislocation distance H ₁ , the above-mentioned dislocation distance L ₀ may be the same as the dislocation distance L ₁ .

It is worth mentioning that the laser is used to emit one of S-polarized light and P-polarized light; the lasers of the first light source 1a, the second light source 2a, the third light source 3a and the fourth light source 4a respectively emit The polarized light can be the same or different, which can be selected according to the actual situation. For example, in this embodiment, the first light source 1a, the second light source 2a, the third light source 3a and the The lasers of the fourth light source 4a are all used to emit P-polarized light.

In this embodiment, the P-polarized light emitted by the lasers of each of the first light sources 1a is used as the first laser beam; the P-polarized light emitted by the lasers of each of the second light sources 2a is used as the second laser beam.

Further, the light source system 100a further includes a second half-wave plate 9a and a third half-wave plate 10a for changing the polarization state of the laser beam, wherein the second half-wave plate 9a is disposed on the third light source Between 3a and the second light guide element 7a, the P-polarized light emitted by the lasers of each of the third light sources 3a passes through the second half-wave plate 9a to realize polarization state conversion to form S-polarized light. light as the third laser beam; the third half-wave plate 10a is disposed between the fourth light source 4a and the two light combining element 8a, and the P-polarized light emitted by the lasers of each of the fourth light sources 4a The polarization state conversion is realized through the third half-wave plate 10a to form S-polarized light, and the S-polarized light is used as the fourth laser beam.

The first light guide element 5a is an optical mirror, which is arranged at a distance from the first light source 1a, and the first light guide element 5a is used to guide the first light beam group 110a to exit to the first combined light element 6a.

The first light-combining element 6a is an area-coated reflector, which is respectively arranged at a distance from the second light source 2a and the first light-guiding element 5a. Specifically, as shown in FIG. 8(a), The first light combining element 6a includes a plurality of first reflection areas 61a and a plurality of first transmission areas 62a, the first reflection areas 61a and the transmission areas 62a are arranged alternately, and the first reflection areas 61a are used for reflection In the second beam group 210a, the first transmission area 61a is used to transmit the first beam group 110a.

The second light guide element 7a is an optical polarizing mirror, which reflects S light and transmits P light, and is arranged at a distance from the third light source 3a. The second light guide element 7a is used to guide the third beam group 310a , the first beam group 110a and the second beam group 210a are emitted to the second light combining element 8a'.

The second light combining element 8a is a polarizing region coated reflector, which is respectively arranged at a distance from the fourth light source 4a and the second light guide element 7a. Specifically, as shown in FIG. 8(a), The second light combining element 8a includes a plurality of second reflection areas 81a and a plurality of second transmission areas 82a, the second reflection areas 81a and the second transmission areas 82a are arranged alternately, and the second reflection areas 81a , which is P light and reflected S light, which is used to reflect the fourth beam group 410a and transmit the first beam group 110a and the second beam group 210a, and the second transmission area 82a is used to transmit the The third beam group 310a, the second beam group 210a, and the first beam group 110a.

It is worth mentioning that the specific position setting between the first light guide element and the first light combining element is not limited, and the specific position setting between the second light guide element and the second light combining element is also unlimited. In this embodiment, the first light guide element 5a and the first light combining element 6a are arranged at intervals along the second direction, and the second light guide element 7a and the second light combining element 8a are mutually offset and spaced along the second direction.

As one of the embodiments, the first light guide element 5a and the first light combining element 6a are also mutually offset along the first direction, and the first light guide element 5a is in the first direction The dislocation distance from the first light combining element 6a is half of the center distance between the two adjacent lasers along the first direction; the second light guide element 7a and the second laser The light combining elements 8a are also displaced from each other along the first direction, and the dislocation distance between the second light guide element 7a and the second light combining element 8a in the first direction is along the first Half of the center-to-center distance between the two lasers that are adjacent in direction.

As another embodiment, the projection size of the first light guide element 5a perpendicular to the second direction is smaller than the projection size of the first light combining element 6a perpendicular to the second direction, and the second light guide element 6a is perpendicular to the second direction. The projection size of the light element 7a perpendicular to the second direction is smaller than the projection size of the second light combining element 8a perpendicular to the second direction; the first light guide element 5a, the first light combining element 6a. The relative position setting of the second light guide element 7a and the second light combining element 8a does not need to consider the dislocation problem in the first direction. Of course, in other embodiments, the projection size of the first light guide element perpendicular to the second direction is larger than the projection size of the first light combining element perpendicular to the second direction, and the projection size of the second light guide element perpendicular to the second direction is larger than A projected dimension of the second light combining element perpendicular to the second direction is also feasible.

In this embodiment, the first light beam group 110a is reflected to the first light combining element 6a through the first light guide element 5a, and the first light combining element 6a reflects the second light beam group 210 and The first beam group 110 is transmitted to combine the first beam group 110a and the second beam group 210a to form a first combined light. At this time, a plurality of the first combined light A beam group 110a and a plurality of the second beam groups 210a are respectively arranged alternately along the first direction, and the plurality of the first laser beams and the plurality of the first laser beams in the first combined beam The two laser beams are arranged alternately and alternately along the direction perpendicular to the first direction, so that the plurality of first laser beams and the plurality of second laser beams are arranged along the first direction to realize the upper and lower insertion seams. And along the direction perpendicular to the first direction, the left and right insertion slits are arranged and the polarized light is combined to form the first combined light.

The third beam group 310a is reflected to the first light combining element 8a through the second light guide element 7a, and the second light combining element 8a reflects the fourth beam group 410a and transmits the third light beam group 310a, to combine the third beam group 310a and the fourth beam group 410a to form a second combined light, at this time, a plurality of the third beam groups 310a and many Each of the fourth beam groups 410a is arranged alternately along the first direction, and a plurality of the third laser beams and a plurality of the fourth laser beams in the second combined beam are arranged along the same The directions perpendicular to the first direction are alternately arranged in turn, so that a plurality of the third laser beams and a plurality of the fourth laser beams are arranged along the first direction to realize the upper and lower insertion seams and along with the first and second laser beams. The left and right insertion slits are arranged in a direction perpendicular to one direction, and the polarized light is combined to form the second combined light.

The first combined light passes through the second light guide element 7a and the second light combining element 8a in sequence, so that the first combined light and the second combined light fill each other's laser beams. Gap to form outgoing combined light, the spot size of the outgoing combined light is similar to that of a single laser, the distribution of the light spot is more continuous, and the extension rate is good. The gaps between the light spots make the surface distribution of the light spots more uniform, thereby more effectively improving the uniform light effect of the light source system 100a.

The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims

A light source system, characterized in that it includes a first light source, a second light source, a first light guide element and a first light combining element; the first light source and the second light source respectively include a plurality of lasers, and the The first light source and the second light source are respectively staggered along the first direction and the second direction, and the first direction and the second direction are perpendicular; the first light guide element is arranged opposite to the first light source, The first light combining element is respectively disposed opposite to the second light source and the first light guiding element;

The first light source is used to emit a plurality of first light beam groups directed towards the first light guide element, and the first light beam group includes a plurality of first lasers respectively emitted by the plurality of lasers of the first light source bundle;

The first light guide element is used for guiding the first light beam group to the first light combining element; the second light source is used for emitting a second light beam group directed to the first light combining element, so the The second beam group includes a plurality of second laser beams respectively emitted by a plurality of lasers of the second light source; the first light combining element is used for transmitting the first beam group and reflecting the second beam group , so as to combine the first beam group and the second beam group to form a first combined light; a plurality of the first beam groups and a plurality of the second beam groups in the first combined light The first direction is alternately inserted and arranged in turn, and the plurality of the first laser beams and the plurality of the second laser beams in the first combined light are arranged alternately and alternately along the third direction. perpendicular to the third direction.
The light source system according to claim 1, wherein the first light guide element and the first light combining element are arranged at intervals along the second direction with a mutual offset.
The light source system according to claim 2, wherein the first light guide element and the first light combining element are mutually displaced along the first direction, and the first light guide element is located in the second light guide element. The dislocation distance from the first light combining element in one direction is half of the center distance between the two adjacent lasers along the first direction.
The light source system according to claim 2, wherein the projection size of the first light guide element perpendicular to the second direction is larger than the projection size of the first light combining element perpendicular to the second direction, Or the projected dimension of the first light guide element perpendicular to the second direction is smaller than the projected dimension of the first light combining element perpendicular to the second direction.
The light source system according to claim 1, wherein the dislocation distance between the first light source and the second light source in the first direction is the same as two adjacent light sources along the first direction. Half of the center distance between the lasers, the dislocation distance between the first light source and the second light source in the second direction is the center between the two adjacent lasers along the second direction half the distance.
The light source system according to claim 1, wherein the light source system further comprises a first half-wave plate disposed between the first light source and the first light guide element, and the first light source has a The laser emitted by the laser realizes polarization state transformation through the first half-wave plate to form the first laser beam; the first laser beam is P-polarized light, and the second laser beam is S-polarized light.
The light source system according to claim 1, wherein the light source system further comprises a third light source, a fourth light source, a second light guide element and a second light combining element;

The third light source and the fourth light source respectively comprise a plurality of lasers, and the third light source and the fourth light source are respectively dislocated along the first direction and the second direction; the second light guide The elements are respectively arranged opposite to the third laser and the first light combining element, and the second light combining element is arranged opposite to the fourth light source and opposite to the third light guide element;

The third light source is used for emitting a plurality of third beam groups directed towards the second light guide element, and the third beam group includes a plurality of third lasers respectively emitted by the plurality of lasers of the third light source The second light guide element is used to guide the third light beam group to the second light combining element; the fourth light source is used to emit a fourth light beam group that is directed to the second light combining element , the fourth beam group includes a plurality of fourth laser beams respectively emitted by a plurality of lasers of the fourth light source; the second light combining element is used for transmitting the third beam group and reflecting the fourth laser beam a beam group, so as to combine the third beam group and the fourth beam to form a second beam combination; a plurality of the third beam groups and a plurality of the fourth beam groups in the second beam combination The plurality of third laser beams and the plurality of the fourth laser beams in the second combined light are arranged alternately and alternately along the third direction; the The first combined light passes through the second light guide element and the second light combining element in turn, and the first combined light and the second combined light fill the gap between the laser beams of each other to form Outgoing combined light.
The light source system according to claim 7, wherein the second light guide element and the second light combining element are arranged at intervals along the second direction in a staggered manner.
The light source system according to claim 8, wherein the second light guide element and the second light combining element are mutually displaced along the first direction, and the second light guide element is located in the first direction. The dislocation distance in one direction from the second light combining element is half of the center distance between the two adjacent lasers along the first direction.
The light source system according to claim 8, wherein the projection size of the second light guide element perpendicular to the second direction is larger than the projection size of the second light combining element perpendicular to the second direction, Or the projected dimension of the second light guide element perpendicular to the second direction is smaller than the projected dimension of the second light combining element perpendicular to the second direction.
The light source system according to claim 7, wherein the dislocation distance between the third light source and the fourth light source in the first direction is two adjacent ones along the first direction. Half of the center distance between the lasers, the dislocation distance between the third light source and the fourth light source in the second direction is the distance between two adjacent lasers along the second direction half of the center distance.
The light source system according to claim 7, wherein the light source system further comprises a second half-wave plate disposed between the third light source and the second light guide element, and a second half-wave plate disposed between the fourth light source and the fourth light guide element. a third half-wave plate between the light source and the second light combining element, the lasers emitted by the plurality of third light sources respectively achieve polarization state transformation through the second half-wave plate to form the third laser beam, The laser beams emitted by the plurality of fourth light sources respectively achieve polarization state transformation through the third half-wave plate to form the fourth laser beam; the first laser beam and the second laser beam are both P-polarized light , the third laser beam and the fourth laser beam are both S-polarized light.
The light source system according to claim 7, wherein the first light combining element comprises a plurality of first reflection areas and a plurality of first transmission areas, the first reflection areas and the first transmission areas are in sequence Alternately arranged, the first reflection area is used to reflect the second beam group, the first transmission area is used to transmit the first beam group; the second light combining element includes a plurality of second reflection areas and A plurality of second transmission areas, the second reflection areas and the transmission areas are arranged alternately in sequence, and the second reflection areas are used to reflect the fourth beam group and transmit the first beam group and the second beam group , the second transmission area is used for transmitting the first beam group, the second beam group and the third beam group.