CN109782515B - Light source system and projection device using the same - Google Patents

Abstract

The invention provides a light source system, which comprises a first light source module, a second light source module and a light combining device, wherein the first light source module generates first light rays, and the second light source module generates second light rays; the first light ray is incident to the light combining device to form a first light spot, the second light ray is incident to the light combining device to form a second light spot, and the light combining device combines the first light spot and the second light spot and projects the first light spot and the second light spot to the light incident surface of an optical machine system. The invention also provides a projection device using the light source system. The light combining device of the light source system enables the luminous fluxes of the first light and the second light to enter the optical-mechanical system simultaneously, and improves the output brightness of the optical-mechanical system.

Description

Light source system and projection device using the same

technical field

The present invention relates to the field of optical technology, and in particular, to a light source system and a projection device using the light source system.

Background technique

At present, with the continuous progress of phosphor technology, the advantages of laser light source in the field of cinema light source are gradually revealed. At present, the conversion efficiency of the phosphor laser into yellow fluorescence is 50%, which means that 50% of the laser energy is dissipated in the form of heat. The temperature rise of the fluorescence color wheel will affect the output of the fluorescence. In the technical field of phosphors, if As the temperature rises, the fluorescence output power decreases, resulting in thermal quenching. At this stage, the output luminous flux of the laser light source can reach tens of thousands of lumens, which can meet the requirements of general theater light sources, but when used in a theater with a giant screen, the laser light source is required to have a larger luminous flux output.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a light source system with large luminous flux output and a projection device using the light source system.

The present invention provides a light source system, comprising a first light source module, a second light source module and a light combining device. The first light source module generates first light, and the second light source module generates a second light; the first light is incident on The light combining device forms a first light spot, the second light incident on the light combining device forms a second light spot, and the light combining device combines the first light spot and the second light spot and simultaneously projects them to the input of an optical-mechanical system glossy.

The present invention also provides a projection apparatus including the above-mentioned light source system.

The light combining device of the light source system of the present invention projects the first light spot and the second light spot to the light incident surface of the optomechanical system, so that the luminous fluxes of the first light and the second light enter the light incidence surface of the optomechanical system at the same time, thereby increasing the projection The luminous flux to the optomechanical system improves the output brightness of the optomechanical system.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a light source system provided by a first embodiment of the present invention.

2 is a schematic plan view of an area beam splitter of a light source system according to a first embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a light combining device of a light source system according to a first embodiment of the present invention.

FIG. 4 is another schematic diagram of the light path of the light source system provided by the first embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a light combining device of a light source system provided by a second embodiment of the present invention.

FIG. 6 is a schematic diagram of the formation process of the light combining device of the light source system provided by the second embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a light combining device of a light source system provided by a third embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a light source system provided by a fourth embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a light combining device of a light source system according to a fourth embodiment of the present invention.

FIG. 10 is a schematic structural diagram of a light source system provided by a fifth embodiment of the present invention.

FIG. 11 is a schematic diagram of an embodiment of a light incident surface of an optomechanical square rod.

FIG. 12 is a schematic diagram of another embodiment of the light incident surface of the optomechanical square rod.

FIG. 13 is a schematic structural diagram of a light source system provided by a sixth embodiment of the present invention.

Description of main component symbols

Light source system 100a, 100b, 100c, 100d Light machine square bar 7 incident light surface 72, 72a, 72b first light source module 10 second light source module 20 Reflective element 3, 4 Double telecentric lens system 6 Reflector 122, 123, 124 upper laser module 111 Lower laser module 112 reflective strip 121 condensing lens 131, 132 square bar 14 relay lens 151, 152 Area beamsplitter 16 middle area 162 surrounding area 164 Yellow light wheel 17 collection lens group 18 diffuser 19 cut line g Light combining device 5a, 5b, 5c, 5d, 5e, 5f Reflector 51, 52 Reflecting Prisms 54, 55a, 55b, 56a, 56b right angle 541 bevel 543 side 544

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

Detailed ways

In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar applications, therefore, the present invention is not limited by the specific embodiments disclosed below.

The light source system of the present invention is applied to a projection device, and is used for combining the light spots emitted by two single light sources to project the optical-mechanical system together, so that the luminous fluxes of the two light sources enter the optical-mechanical system at the same time, and the output brightness of the optical-mechanical system is improved. The optical-mechanical system includes an optical-mechanical square bar 7, and a rectangular light-incident surface 72 is formed at the entrance of the optical-mechanical square bar 7. As shown in FIG. In this embodiment, the size of the light incident surface 72 is 10.45 mm×19.56 mm. The light spot emitted by the light source is imaged on the light incident surface 72 of the optical-mechanical square rod 7 as a rectangular light spot whose size matches the size of the light-incident surface 72 of the optical-mechanical square rod 7 .

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a light source system 100a according to a first embodiment of the present invention. The light source system 100 a includes a first light source module 10 and a second light source module 20 , reflective elements 3 and 4 , a light combining device 5 a and a double telecentric lens system 6 . In this embodiment, the reflecting elements 3 and 4 are two reflecting mirrors.

The first light source module 10 and the second light source module 20 have the same composition and structure, and are symmetrically arranged. It can be understood that, in other embodiments, the first light source module 10 and the second light source module 20 may also be arranged asymmetrically. In order to simplify the description, only the first light source module 10 will be described below.

The first light source module 10 includes an upper laser module 111, a lower laser module 112, a plurality of reflective elements, a plurality of focusing lenses, a shaping element, a plurality of relay lenses, a beam splitting element, a fluorescent wheel, a collection lens group 18 and a scattering Piece 19.

The shaping element is an element that can uniformize and shape light, such as diffractive optical elements, fly-eye lens pairs, square rods, and the like. In this implementation test, the shaping element is a square rod 14; the beam splitting element is an area beam splitter 16; the fluorescent wheel is a yellow light wheel 17; 131, 132. These relay lenses include relay lenses 151 , 152 .

As shown in FIG. 1 , in this embodiment, the upper laser module 111 and the lower laser module 112 are both 8×12 laser arrays. To simplify the description, the upper laser module 111 and the lower laser module 112 only schematically illustrate a 4×4 laser array. The parallel light emitted from the upper laser module 111 and the lower laser module 112 is spatially compressed after being reflected by the corresponding reflecting bars 121 , and then reflected by the reflecting mirror 122 and then focused by the focusing lens 131 to the square bar 14 for uniform light and shaping. Using the square bar 14, on the one hand, makes the subsequent laser spot focused on the yellow light wheel 17 more uniform, and improves the conversion efficiency of yellow fluorescence; The shape and size of the light incident surface 72 of the square rod 7 are matched. The laser light emitted from the square rod 14 enters the area beam splitter 16 after being parallelized by the relay lens 151 and the relay lens 152 . Referring to FIG. 2 , the middle area 162 of the area beam splitter 16 transmits blue laser light; the surrounding area 164 of the area beam splitter plate 16 reflects blue laser light and transmits yellow laser light. It can be understood that, the area beam splitter can adopt a mode in which the central area transmits the excitation light and reflects the received laser light, and can also adopt the mode in which the central area reflects the excitation light and transmits the received laser light for beam splitting. Therefore, the blue light transmitted through the middle area 162 of the regional beam splitter 16 is focused on the reflective diffuser 19 through the collection lens group 18. The function of the diffuser 19 is to reduce the coherence of the laser light. The outgoing light surface is image-focused, so a rectangular light spot is also formed on the diffusion sheet 19, and the size of the rectangular light spot is 2.43mm×2.59mm. The distribution of the blue light reflected from the rectangular spot is Lambertian distribution. After being parallelized by the collecting lens group 18, it reaches the area beam splitter 16, is reflected to the focusing lens 132, and is reflected by the reflective element 4 at position A in FIG. 1 . Focused to form a blue rectangular spot. The size of the blue rectangular light spot is 10.45mm×9.78mm. Similarly, the blue laser light passing through the surrounding area 164 of the area beam splitter 16 is reflected to the yellow light wheel 17 to excite yellow fluorescence. In this embodiment, the power of the blue light incident on the substrate of the yellow light wheel 17 is 550W, which is finally focused into a 10.45mm×9.78mm yellow rectangular light spot at position A in FIG. 1 , the yellow rectangular light spot and the blue rectangular light spot The superposition forms a white rectangular light spot.

Similarly, the light path of the second light source module 20 is the same as that of the first light source module 10 , and the light emitted from the second light source module 20 forms a white rectangular light spot at the position B in FIG. 1 .

Please also refer to FIG. 3 , the light combining device 5a includes two mirrors 51 arranged vertically. The two mirrors 51 are symmetrically arranged relative to the horizontal plane (XZ plane). The angle between each mirror 51 and the horizontal plane is 45 degrees. The outer sides of the two reflecting mirrors 51 are reflecting surfaces, and the two reflecting surfaces are perpendicular to each other and symmetrically arranged relative to the horizontal plane. The light reflected by the rectangular light spot at the position A through the upper reflecting mirror 51 can be regarded as the light directly emitted from the virtual object A1. The light reflected by the rectangular light spot at the position B through the lower reflecting mirror 51 can be regarded as the light directly emitted from the virtual object B1.

The rectangular light spot formed by the combination of the virtual object A1 and the virtual object B1 is imaged on the light incident surface 72 of the optical-mechanical square rod 7 by the double telecentric lens system 6 . The inverted images W1 and W2 formed by the virtual object A1 and the virtual object B1 each occupy half of the light incident surface 72 of the square rod 7 of the optical machine. The light spot at the A position, the light spot at the B position and the light incident surface 72 of the optomechanical square rod 7 are all rectangles. The efficiency of the light spot coupling into the square rod 7 of the light machine is high.

Both the object-side principal ray and the image-side principal ray of the double telecentric lens system 6 are parallel to the optical axis, which can avoid the light caused by the position tolerance of the first light source module 10 , the second light source module 20 and the double telecentric lens system 6 during installation. The coupling efficiency of the machine square rod 7 becomes low.

The light spot emitted from the first light source module 10 gradually becomes smaller as the propagation path increases. When the light spot is focused into a rectangular light spot at position A, the light spot is the smallest, and then becomes larger and larger as the propagation path increases. A part of the light cannot be reflected by the reflector 51 and continues to travel downward, and a part of the luminous flux will be lost. According to Lighttools optical design analysis software simulation, the lost luminous flux is equal to about 6% of the total luminous flux. Similarly, the light spot emitted by the second light source module 20 will also lose a part of the luminous flux.

Please refer to FIG. 4 . FIG. 4 is another schematic diagram of the light path of the light source system 100 according to the first embodiment of the present invention. When the light combining device 5a (ie, the two reflecting mirrors 51) is not placed in the optical path, the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflecting element 3 and the second reflecting element 4, respectively, at C in FIG. 4 . The position is focused into a rectangular spot. The two rectangular spots are the same size and overlap.

When the light combining device 5a (ie, the two reflecting mirrors 51) is placed in the optical path, the light emitted from the first light source module 10 and the second light source module 20 are reflected by the reflecting surfaces of the two reflecting mirrors 51 to form two rectangular light spots arranged up and down respectively. , that is, the C1 position and the C2 position in FIG. 4 are respectively focused into a rectangular light spot. The rectangular light spot formed by the combination of the C1 position and the C2 position forms the images W1 and W2 on the light incident surface 72 of the optical-mechanical square rod 7 through the double telecentric lens system 6 .

Please refer to FIG. 3 again, since the reflector 51 has a certain thickness, when the two reflectors 51 are placed perpendicular to each other, the two reflectors 51 are in line contact, that is, there is a gap between the reflecting surfaces of the two reflectors 51, which will cause C1 The rectangular light spot at position C2 cannot fit together, and there is also a certain gap, which affects the uniformity of light finally projected onto the light incident surface 72 of the square rod 7 of the optomechanical.

In order to improve the uniformity of light projected to the light incident surface 72 of the optomechanical square bar 7, the present invention further improves the light combining device, so that the two rectangular light spots can be seamlessly and non-overlapping coupled into the incoming light of the optomechanical system face 72.

Referring to FIG. 5, the light combining device 5b of the light source system provided by the second embodiment of the present invention includes two mirrors 52 symmetrically arranged relative to the horizontal plane (XZ plane). The two reflecting mirrors 52 are placed perpendicular to each other, and the reflecting surfaces of the two reflecting mirrors 52 are in seamless contact, so that the light emitted from the first light source module 10 and the second light source module 20 are reflected by the two reflecting mirrors 52 to form an up and down arrangement without gaps, respectively. The two rectangular light spots W1 and W2 can be closely attached together, that is, the two rectangular light spots W1 and W2 are projected to the light incident surface 72 seamlessly and non-overlapping. The light combining device 5b seamlessly couples the two rectangular light spots W1 and W2 to the light incident surface 72, so that the luminous fluxes of the first light source module 10 and the second light source module 20 enter the optomechanical system at the same time, thereby improving the output brightness of the optomechanical system.

Specifically, a triangular prism can be cut off from the ends of the two mirrors 51 of the light combining device 5a of the first embodiment. The two bottom surfaces of the triangular prism are isosceles right triangles, and the length of the right-angled side is the thickness of the mirror. , the height of the triangular prism is the height of the mirror (as shown in Figure 6). In FIG. 6 , the part between the two cutting lines g of the two mirrors 51 is the part to be cut off.

Referring to FIG. 7 , the light combining device 5c of the light source system provided by the third embodiment of the present invention may also be an L-shaped reflector formed integrally, so that the two reflecting surfaces (outer sides of the L-shaped reflector) are in seamless contact.

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a light source system 100b according to a fourth embodiment of the present invention. The light path of the light source system 100b of the fourth embodiment is the same as that of the light source system 100a of the first embodiment, and the difference is only in the structure of the light combining device. Please also refer to FIG. 9 , the light combining device 5d is a reflecting prism 54 with an integral structure. The light-combining device 5d adopts an integral structure, which makes it easier to control processing and assembly errors. The cross section of the reflecting prism 54 is an isosceles right triangle, the inclined surface 543 of the reflecting prism 54 is perpendicular to the horizontal plane (XZ plane), and the included angles between the two right-angled planes 541 of the reflecting prism 54 and the horizontal plane (XZ plane) are respectively 45 degrees, The inclined surface 543 of the reflection prism 54 is perpendicular to the horizontal plane (XZ plane). The two right-angled surfaces 541 of the reflecting prism 54 are reflecting surfaces. That is, the two reflective surfaces are perpendicular to each other and symmetrically arranged with respect to the horizontal plane.

When the light combining device 5d is not placed in the optical path, the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflective element 3 and the second reflective element 4 and focused into a rectangular light spot at the position D in FIG. 8 . The two rectangular spots are the same size and overlap.

When the light combining device 5d is placed in the optical path, the light emitted by the first light source module 10 and the second light source module 20 is reflected by the reflecting element 3 and the second reflecting element 4 and reflected by the light combining device 5d at positions D1 and 20 in FIG. 8 , respectively. Position D2 is focused into a rectangular light spot, and the rectangular light spots at positions D1 and D2 are arranged seamlessly up and down without overlapping, and images W1 and W2 are formed on the light incident surface 72 of the square rod 7 by the double telecentric lens system 6 .

In order to improve the reflection efficiency of the reflection prism 54 , two right-angle surfaces 541 of the reflection prism 54 are coated with a high-reflection film.

Please refer to FIG. 10. FIG. 10 is a schematic structural diagram of a light source system 100c according to a fifth embodiment of the present invention. The light source system 100c of the fifth embodiment is also different from the light source system 100a of the first embodiment in that the structure of the light combining device is different. The light combining device 5e of the fifth embodiment includes two reflecting prisms 55a and 55b. The two reflecting prisms 55a and 55b are arranged symmetrically with respect to the horizontal plane (XZ plane). The cross section of each reflecting prism 55a, 55b is an isosceles right triangle, and the inclined surface of each reflecting prism 55a, 55b faces the horizontal plane and the included angle with the horizontal plane is 45 degrees. The inclined surfaces of each of the reflecting prisms 55a and 55b are reflecting surfaces, that is, the two reflecting surfaces are perpendicular to each other and symmetrically arranged with respect to the horizontal plane.

The light emitted from the first light source module 10 first passes through the reflective element 3 and then is focused at the right-angled surface E1 of the reflective prism 55a into a rectangular light spot whose size matches the size of the right-angled surface E1 of the reflective prism 55a, and enters the slanted surface of the reflective prism 55a. After the light is incident on the inclined surface, total reflection occurs and exits from another right-angled surface E3.

Similarly, the light emitted from the second light source module 20 first passes through the reflective element 4 and is then focused at the right-angle surface E2 of the reflective prism 55b into a rectangular light spot that matches the size of the right-angled surface of the reflective prism 55b, and enters the right angle of the reflective prism 55b. After the light from the surface is incident on the inclined surface, total reflection occurs and exits from another right-angled surface E4.

The light rays emitted from the right-angle surfaces of the reflecting prisms 55 a and 55 b are then collected by the double telecentric lens system 6 to the light incident surface 72 of the optical-mechanical square rod 7 . It is equivalent to imaging the vertically arranged seamless and non-overlapping rectangular light spots combined at E3 and E4 to the light incident surface 72 of the optical-mechanical square rod 7 through the double telecentric lens system 6 to form images W1 and W2.

After the light entering the right-angle surface of the reflecting prisms 55a and 55b is incident on the inclined surface, most of the light rays will undergo total reflection and exit from another right-angle surface, and the light exceeding the critical angle will be transmitted through the inclined surface and lost. In order to improve the reflection efficiency of the inclined surfaces, the inclined surfaces of the reflecting prisms 55a and 55b are coated with high-reflection films; at the same time, the two sides of the reflecting prisms 55a and 55b are polished, which has good total reflection performance and avoids the direct emission of light from the sides. , which increases the efficiency of light output from the reflective prism.

Please refer to FIG. 11 , the light incident surface 72 of the optical-mechanical square rod 7 is divided into two rectangles along the center of the long side, and the rectangular light spots emitted by the first light source module 10 and the second light source module 20 are passed through the light combining device and the double telecentric light lens. The system 6 projects onto the two rectangles, respectively.

Please refer to FIG. 12 , the light incident surface 72 of the optomechanical square bar 7 is divided into two rectangles along the center of the short side, and the positions of the first light source module 10 , the second light source module 20 , the light combining device or the optomechanical square bar are adjusted. The rectangular light spots emitted by a light source module 10 and a second light source module 20 can be projected onto the two rectangles, respectively.

Please refer to FIG. 13. FIG. 13 is a schematic structural diagram of a light source system 100d according to a sixth embodiment of the present invention. In the sixth embodiment, by changing the size and shape of the square rods 14 (refer to FIG. 1 ) of the first light source module 10 and the second light source module 20 , the first light source module 10 and the second light source module 20 emit a focused rectangle. The spot size is 19.56mm×5.225mm, and then it is focused and imaged at the entrance of the optical-mechanical square rod 7 through two reflection prisms 56a and 56b (the cross-section of each reflection prism 56a and 56b is an isosceles right triangle) and a double telecentric lens system 6 . On the light surface 72 , the final size of the two light spots W combined in parallel is 19.56 mm×10.45 mm.

The light combining device of the light source system of the present invention projects the rectangular light spot formed by the light emitted from the first light source module and the second light source module to the rectangular light incident surface of the optomechanical system, which improves the efficiency of the light spot coupling into the optomechanical system, so that the first light spot is coupled into the optomechanical system. The luminous flux of the light emitted by the first light source module and the second light source module enters the optomechanical system at the same time, which increases the luminous flux projected to the optomechanical system and improves the output brightness of the optomechanical system.

The invention uses a semiconductor laser as the excitation light source, the laser has the advantages of high energy density and small etendue, excites the fluorescent powder to generate high-efficiency fluorescence, can obtain a light source with high energy density, and is applied in the field of lighting, especially for beam quality requirements In higher occasions, it has an absolute advantage. Therefore, the novel light source system used in the lighting field provided by the present invention is especially suitable for applications where the beam quality is relatively high, and has a good promotion effect for expanding the application field of the laser phosphor light source.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A light source system, characterized in that, comprising: a first light source module for generating a first light; a second light source module for generating a second light; and a light-combining device; The first light is incident on the light combining device to form a first light spot, the second light is incident on the light combining device to form a second light spot, and the light combining device combines the first light spot and the second light spot together and projects them to a The light incident surface of the optomechanical system; Both the first light source module and the second light source module include a laser module and a shaping element, and the shaping element is used to shape the laser light emitted by the laser module, so that the shape and size of the laser spot is the same as that of the optical machine. The shape and size of the light incident surface of the system are matched; The first light source module and the second light source module further include a fluorescent wheel, a regional beam splitter and a scattering plate, respectively, and the laser light emitted from the shaping element is incident to the blue laser light transmitted by the regional beam splitter. The scattering sheet is used to reduce the coherence of the blue laser light, and the laser light emitted from the shaping element is incident on the fluorescence wheel through the blue laser light reflected by the area beam splitter, and yellow fluorescence is excited; The light combining device includes two reflective surfaces that are perpendicular to each other and are in seamless contact with each other. The first light and the second light are reflected by the two reflective surfaces to form two light spots arranged up and down without a gap, respectively. 2 . The light source system according to claim 1 , wherein the optical-mechanical system comprises an optical-mechanical square rod, the light incident surface is formed at the entrance of the optical-mechanical square rod, the first light spot, The second light spot and the light incident surface are substantially rectangular. 3 . The light source system of claim 2 , wherein the first light spot and the second light spot respectively occupy half of the light incident surface. 4 . 4 . The light source system of claim 3 , wherein the first light spot and the second light spot are respectively projected onto two rectangles divided along the center of the short side or the center of the long side of the light incident surface. 5 . 5. The light source system according to claim 1, wherein the light source system further comprises a first reflection element and a second reflection element symmetrically arranged along a plane, the first reflection element A light is reflected to the light combining device to form the first light spot, and the second reflecting element reflects the second light to the light combining device to form the second light spot. 6 . The light source system according to claim 5 , wherein the light combining device comprises a pair of mirrors arranged symmetrically with respect to the plane and perpendicular to each other, and the two reflecting surfaces of the light combining device are reflective surfaces of the pair of mirrors. 7 . The reflective surfaces respectively form 45 degrees with the included angle of the plane, the first reflective element makes the first light rays and the second reflective element makes the second light rays respectively incident on the reflective surfaces of the pair of reflective mirrors. 7 . The light source system of claim 5 , wherein the pair of reflecting mirrors are integrally formed and have an L-shape. 8 . 8 . The light source system according to claim 5 , wherein the light combining device comprises a reflecting prism, the cross section of the reflecting prism is an isosceles right triangle, and the two right-angled surfaces of the reflecting prism are the two reflecting surfaces. 9 . , the two right-angle surfaces of the reflecting prism are respectively 45 degrees with the included angle of the plane, the first reflecting element reflects the first light and the second reflecting element reflects the second light respectively to the two right-angle surfaces of the reflecting prism. 9 . The light source system of claim 8 , wherein the right-angle surface of the reflecting prism is coated with a high-reflection film. 10 . 10 . The light source system according to claim 5 , wherein the light combining device comprises two reflecting prisms which are symmetrically arranged along the plane and whose cross-sections are isosceles right triangles, and the inclined surfaces of the two reflecting prisms are the two reflecting surfaces. 11 . , the angle between the inclined surfaces of the two reflecting prisms and the plane is 45 degrees, respectively, the first reflecting element reflects the first light and the second reflecting element reflects the second light to the two The right-angle surface of the reflecting prism, the inclined surface of each reflecting prism reflects the incident light and emits it from the other right-angle surface. 11. The light source system according to claim 10, wherein the inclined surface of each reflecting prism is coated with a high-reflection film. 12 . The light source system of claim 10 , wherein two sides of each reflecting prism are polished surfaces. 13 . 13. The light source system according to any one of claims 1 to 12, wherein a double telecentric lens system is further provided between the light combining device and the optomechanical system, and the first light spot and The second light spot is imaged on the light incident surface of the optical-mechanical system through the double telecentric lens system. 14. The light source system of claim 1, wherein the shaping element is a square rod. 15. A projection device comprising the light source system of any one of claims 1-14.

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