CN109782515B

CN109782515B - Light source system and projection device using same

Info

Publication number: CN109782515B
Application number: CN201711116266.2A
Authority: CN
Inventors: 侯海雄; 唐晓峰; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2017-11-13
Filing date: 2017-11-13
Publication date: 2022-06-03
Anticipated expiration: 2037-11-13
Also published as: WO2019090958A1; CN109782515A

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 same

Technical Field

The invention relates to the technical field of optics, in particular to a light source system and a projection device using the same.

Background

At present, with the continuous progress of the fluorescent powder technology, the advantages of the laser light source in the field of the cinema light source are gradually revealed. At present, the efficiency of converting phosphor powder laser into yellow fluorescence is 50%, which means that 50% of laser energy is emitted in the form of heat, the temperature rise of a fluorescent color wheel influences the output of the fluorescence, and in the technical field of phosphors, the thermal quenching phenomenon is generated when the output power of the fluorescence is reduced if the temperature rises. The output luminous flux of the laser light source at the present stage can reach tens of thousands of lumens, which can meet the requirements of the common cinema light source, but when the laser light source is applied to a large-screen cinema, the laser light source is required to have larger luminous flux output.

Disclosure of Invention

In view of the above, it is desirable to provide a light source system with large luminous flux output and a projection apparatus using the light source system.

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 comprising the light source system.

The light combining device of the light source system projects the first light spot and the second light spot to the light inlet surface of the optical-mechanical system, so that the luminous fluxes of the first light ray and the second light ray enter the light inlet surface of the optical-mechanical system at the same time, the luminous flux projected to the optical-mechanical system is increased, and the output brightness of the optical-mechanical system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are some examples of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a light source system according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view of a local 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 optical path diagram of the light source system according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a light combining device of a light source system according to a second embodiment of the present invention.

Fig. 6 is a schematic diagram of a process of forming a light combining device of a light source system according to a second embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a light combining device of a light source system according to a third embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a light source system according to 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 according to a fifth embodiment of the present invention.

FIG. 11 is a schematic diagram of an embodiment of the light incident surface of a bare engine square bar.

FIG. 12 is a schematic diagram of another embodiment of the light incident surface of a bare engine square bar.

Fig. 13 is a schematic structural diagram of a light source system according to a sixth embodiment of the present invention.

Description of the main elements

Light source system	100a、100b、100c、100d
		Optical machine square bar	7
Light incident surface	72、72a、72b
		First light source module	10
Second light source module	20
		Reflective element	3、4
Double telecentric lens system	6
		Reflecting mirror	122、123、124
Upper laser module	111
		Lower laser module	112
Reflecting strip	121
		Condensing lens	131、132
Square bar	14
		Relay lens	151、152
Area light splitting sheet	16
		Middle area	162
Peripheral region	164
		Huang Guanglun	17
Collecting lens group	18
		Scattering sheet	19
Resection line	g
		Light-combining device	5a、5b、5c、5d、5e、5f
Reflecting mirror
		51、52
Reflection prism			54、55a、55b、56a、56b
	Right angle surface	541
Inclined plane			543
	Side surface	544

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention and the scope of the present invention is therefore not limited to the specific embodiments disclosed below.

The light source system is applied to the projection device and is used for combining light spots emitted by the two single light sources together and projecting the light spots to the optical-mechanical system, so that the luminous fluxes of the two light sources enter the optical-mechanical system simultaneously, and the output brightness of the optical-mechanical system is improved. The optical-mechanical system comprises an optical-mechanical square rod 7, and a rectangular light incident surface 72 is formed at the entrance of the optical-mechanical square rod 7. In the present embodiment, the size of the light incident surface 72 is 10.45mm × 19.56 mm. The light spots emitted by the light source are imaged into rectangular light spots on the light incident surface 72 of the optical rectangular bar 7, and the size of the rectangular light spots is matched with that of the light incident surface 72 of the optical rectangular bar 7.

Referring 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 100a includes a first light source module 10, a second light source module 20,

reflective elements

3 and 4, a light combining device 5a, and a double telecentric lens system 6. In this embodiment, the

reflective elements

3 and 4 are two mirrors.

The first light source module 10 and the second light source module 20 have the same composition and structure, and are symmetrically disposed. It is understood that, in other embodiments, the first light source module 10 and the second light source module 20 may be disposed asymmetrically. For simplicity of 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 splitter, a fluorescence wheel, a collecting lens assembly 18, and a diffuser 19.

The shaping element is an element capable of homogenizing and shaping light, such as a diffractive optical element, a fly-eye lens pair, a square rod and the like. In this example, the shaping element is a square bar 14; the light-splitting element is a region light-splitting sheet 16; the fluorescent wheel is a yellow wheel 17; these reflective elements include a reflective strip 121,

mirrors

122, 123, 124; these focusing lenses include focusing

lenses

131, 132. These relay lenses include

relay lenses

151, 152.

As shown in fig. 1, in the present embodiment, the upper laser module 111 and the lower laser module 112 are both 8 × 12 laser arrays. For simplicity of illustration, upper laser module 111 and lower laser module 112 are only schematically drawn as a 4 × 4 laser array. The parallel light emitted from the upper laser module 111 and the lower laser module 112 is compressed in space after being reflected by the corresponding reflection strip 121, and then is focused to the square rod 14 by the focusing lens 131 after being reflected by the reflection mirror 122 for dodging and shaping. By using the square rod 14, on one hand, the laser spots subsequently focused on the yellow wheel 17 are more uniform, and the conversion efficiency of yellow fluorescence is improved; on the other hand, the square bar 14 can shape the laser to match the shape and size of the laser spot with the shape and size of the light incident surface 72 of the optical bench square bar 7. The laser light emitted from the square rod 14 is collimated by the relay lens 151 and the relay lens 152, and then enters the area beam splitter 16. Referring to fig. 2, the middle region 162 of the area splitter 16 transmits blue laser light; the peripheral area 164 of the area-splitting sheet 16 reflects blue laser light and transmits yellow laser light. It is understood that the area splitting sheet may be configured to transmit the excitation light and reflect the stimulated light in the central area, or may be configured to split the excitation light and transmit the stimulated light in the central area. The blue light transmitted through the middle region 162 of the area splitter 16 is focused by the collecting lens group 18 onto the reflective diffuser 19, the diffuser 19 reduces the coherence of the laser light, and since the collecting lens group 18 is focused to image the light emitting surface of the square rod 14, a rectangular light spot with a size of 2.43mm × 2.59mm is formed on the diffuser 19. The blue light reflected from the rectangular spot is lambertian, collimated by the collecting lens assembly 18, reaches the local splitter 16, is reflected to the focusing lens 132, and is reflected by the reflecting element 4 to be focused at the position a in fig. 1 to form a blue rectangular spot. The size of the blue rectangular spot is 10.45mm by 9.78 mm. Similarly, the blue laser beam passing through the peripheral region 164 of the region splitter 16 is reflected to the yellow wheel 17 to excite yellow fluorescence. In this embodiment, the blue light power incident on the substrate of the yellow wheel 17 is 550W, and is finally focused into a yellow rectangular spot of 10.45mm × 9.78mm at the position a in fig. 1, and the yellow rectangular spot and the blue rectangular spot are overlapped to form a white rectangular 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.

Referring to fig. 3, the light combining device 5a includes two vertically disposed mirrors 51. The two mirrors 51 are symmetrically arranged with respect to a horizontal plane (XZ plane). Each mirror 51 is angled at 45 degrees to the horizontal. The outer side surfaces of the two reflecting mirrors 51 are reflecting surfaces, and the two reflecting surfaces are perpendicular to each other and are symmetrically arranged relative to a horizontal plane. The light reflected by the rectangular spot at position a via the upper mirror 51 can be regarded as light directly emerging from the imaginary object a 1. The light reflected by the lower mirror 51 from the rectangular spot at position B can be regarded as light directly emerging from the virtual object B1.

The rectangular light spot formed by combining the virtual object A1 and the virtual object B1 is imaged on the light incident surface 72 of the light machine square bar 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 account for half of the light incident surface 72 of the optical square bar 7. The light spot at the position A, the light spot at the position B and the light incident surface 72 of the square optical machine rod 7 are rectangular, and the efficiency of the rectangular light spot at the position A and the efficiency of the rectangular light spot at the position B in coupling with the square optical machine rod 7 are higher than that of the square optical machine rod 7 in coupling with the circular light spot.

The object side chief ray and the image side chief ray of the double telecentric lens system 6 are both parallel to the optical axis, so that the coupling efficiency of the optical machine square rod 7 caused by the position tolerance when the first light source module 10, the second light source module 20 and the double telecentric lens system 6 are installed can be prevented from being lowered.

The light spot emitted from the first light source module 10 becomes smaller as the propagation path increases, and becomes the smallest when focused to the rectangular light spot at the position a, and then becomes larger as the propagation path increases. A part of the light is not reflected by the mirror 51 and continues to travel downward, and a part of the light flux is 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 from the second light source module 20 may also lose a part of the light flux.

Referring to fig. 4, fig. 4 is another schematic optical path diagram of the light source system 100 according to the first embodiment of the invention. When the light combining device 5a (i.e. the two reflectors 51) is not disposed in the light path, the light beams emitted by the first light source module 10 and the second light source module 20 are reflected by the reflective element 3 and the second reflective element 4, and then focused into a rectangular light spot at the position C in fig. 4. The two rectangular spots are the same size and overlap.

When the light combining device 5a (i.e., the two reflectors 51) is placed in the light path, the light beams emitted from the first light source module 10 and the second light source module 20 are reflected by the reflecting surfaces of the two reflectors 51 to form two rectangular light spots arranged up and down, respectively, that is, the light spots are focused into a rectangular light spot at the position C1 and the position C2 in fig. 4, respectively. And the rectangular light spot combined by the position C1 and the position C2 forms images W1 and W2 on the light incident surface 72 of the optical rectangular bar 7 through the double telecentric lens system 6.

Referring to fig. 3 again, since the reflective mirrors 51 have a certain thickness, when the two reflective mirrors 51 are placed perpendicular to each other, the two reflective mirrors 51 are in line contact, that is, a gap exists between the reflective surfaces of the two reflective mirrors 51, which causes that the rectangular light spots at the C1 position and the C2 position cannot be attached to each other, and a certain gap also exists, thereby affecting the uniformity of the light finally projected to the light incident surface 72 of the optical bench square bar 7.

In order to improve the uniformity of the light projected to the light incident surface 72 of the optical bench square bar 7, the present invention further improves the light folding device, so that two rectangular light spots can be coupled to the light incident surface 72 of the optical bench system without seam and misalignment.

Referring to fig. 5, a light combining device 5b of a light source system according to a second embodiment of the present invention includes two reflectors 52 symmetrically disposed with respect to a horizontal plane (XZ plane). The two reflectors 52 are disposed perpendicular to each other, and the reflective surfaces of the two reflectors 52 are in seamless contact, so that the light beams emitted from the first light source module 10 and the second light source module 20 are reflected by the two reflectors 52 to form two rectangular light spots W1 and W2 which are vertically arranged and have no gap, respectively, and can be tightly attached together, that is, the two rectangular light spots W1 and W2 are projected onto the light incident surface 72 seamlessly and non-coincidently. The light combining device 5b couples the two rectangular light spots W1 and W2 to the light incident surface 72 in a seamless manner, so that the light fluxes of the first light source module 10 and the second light source module 20 enter the optical-mechanical system at the same time, and the output brightness of the optical-mechanical system is improved.

Specifically, the end portions of the two reflectors 51 of the light combining device 5a of the first embodiment may be respectively cut off to form a triangular prism, the two bottom surfaces of the triangular prism may be isosceles right triangles, the length of each right triangle may be the thickness of the reflector, and the height of the triangular prism may be the height of the reflector (as shown in fig. 6). In fig. 6, the portion between the two cutting lines g of the two mirrors 51 is the portion to be cut, and the height direction refers to the direction perpendicular to the right-angle surface, and therefore is consistent with the height of the mirror 51.

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

Referring to fig. 8, fig. 8 is a schematic structural diagram of a light source system 100b according to a fourth embodiment of the invention. The light source system 100b of the fourth embodiment is the same as the light source system 100a of the first embodiment in the optical path, and is different only in the structure of the light combining device. Referring to fig. 9, the light combining device 5d is a reflection prism 54 of an integral structure. The light combining device 5d adopts an integral structure, and processing and assembling errors are easy to control. The cross section of the reflection prism 54 is an isosceles right triangle, the inclined plane 543 of the reflection prism 54 is perpendicular to the horizontal plane (XZ plane), the included angles between the two right-angle surfaces 541 of the reflection prism 54 and the horizontal plane (XZ plane) are 45 degrees, respectively, and the inclined plane 543 of the reflection prism 54 is perpendicular to the horizontal plane (XZ plane). The two right-angle surfaces 541 of the reflection prism 54 are reflection surfaces. Namely, the two reflecting surfaces are vertical to each other and are symmetrically arranged relative to the horizontal plane.

When the light combining device 5D is not placed in the light path, the light beams emitted by the first light source module 10 and the second light source module 20 are reflected by the reflecting element 3 and the second reflecting element 4 and then 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 rays emitted by the first light source module 10 and the second light source module 20 are reflected by the reflecting element 3 and the second reflecting element 4 and the light combining device 5D and then focused into a rectangular light spot at the position D1 and the position D2 in fig. 8, the rectangular light spots at the positions D1 and D2 are arranged up and down without seams and overlaps, and images W1 and W2 are formed on the light incident surface 72 of the optical machine square rod 7 through the double telecentric lens system 6.

In order to improve the reflection efficiency of the reflection prism 54, high reflective films are coated on the right-angle surfaces 541 of the reflection prism 54.

Referring 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 the structure of the light combining device. The light combining device 5e of the fifth embodiment includes two reflecting prisms 55a and 55 b. The two reflection prisms 55a and 55b are arranged symmetrically with respect to a horizontal plane (XZ plane). The cross section of each reflection prism 55a, 55b is an isosceles right triangle, and the inclined plane of each reflection prism 55a, 55b faces the horizontal plane and forms an angle of 45 degrees with the horizontal plane. The inclined surface of each of the reflection prisms 55a and 55b is a reflection surface, that is, the two reflection 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 a right-angle surface E1 of the reflective prism 55a to form a rectangular light spot with a size matched with that of the right-angle surface E1 of the reflective prism 55a, and the light entering the inclined surface of the reflective prism 55a is incident on the inclined surface and then totally reflected to exit from the other right-angle surface E3.

Similarly, the light emitted from the second light source module 20 first passes through the reflecting element 4, and then is focused on the right-angle surface E2 of the reflecting prism 55b to form a rectangular light spot with a size matching with that of the right-angle surface of the reflecting prism 55b, and the light entering the right-angle surface of the reflecting prism 55b is incident on the inclined surface and then totally reflected to exit from the other right-angle surface E4.

The light rays emitted from the right-angle surfaces of the reflecting prisms 55a and 55b are collected to the light incident surface 72 of the optical machine square rod 7 through the double telecentric lens system 6. The combined up-down seamless and misaligned rectangular light spots at the position E3 and the position E4 are imaged to the light incident surface 72 of the optical rectangular rod 7 through the double telecentric lens system 6 to form images W1 and W2.

Most of the light rays entering the right-angle surfaces of the reflecting prisms 55a and 55b are totally reflected and exit from the other right-angle surface after entering the inclined surface, and the light rays exceeding the critical angle are transmitted from the inclined surface and lost. In order to improve the reflection efficiency of the inclined surfaces, a high reflection film is plated on the inclined surfaces of the reflection prisms 55a and 55 b; meanwhile, two side surfaces of the reflecting prisms 55a and 55b are polished, so that the reflecting prism has good total reflection performance, light is prevented from being directly emitted from the side surfaces, and the light emitting efficiency of the reflecting prisms is improved.

Referring to fig. 11, the light incident surface 72 of the optical rectangular bar 7 is divided into two rectangles along the center of the long side, and the rectangular light spots emitted from the first light source module 10 and the second light source module 20 are projected to the two rectangles through the light combiner and the double telecentric lens system 6.

Referring to fig. 12, the light incident surface 72 of the optical rectangular bar 7 is divided into two rectangles along the center of the short side, the positions of the first light source module 10, the second light source module 20, the light combining device or the optical rectangular bar are adjusted, and the rectangular light spots emitted from the first light source module 10 and the second light source module 20 can be projected onto the two rectangles respectively.

Referring 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, the size and shape of the square bar 14 (please refer to fig. 1) of the first light source module 10 and the second light source module 20 are changed, so that the size of the rectangular spot emitted and focused by the first light source module 10 and the second light source module 20 is 19.56mm × 5.225mm, and then the two spots W are focused and imaged on the light incident surface 72 of the optical machine square bar 7 through the two reflection prisms 56a and 56b (the cross section of each reflection prism 56a and 56b is an isosceles right triangle) and the double telecentric lens system 6, and finally the size of the spot W combined in parallel is 19.56mm × 10.45 mm.

The light combining device of the light source system projects the rectangular light spot formed by the light rays emitted by the first light source module and the second light source module to the rectangular light incident surface of the optical-mechanical system, so that the efficiency of coupling the light spot into the optical-mechanical system is improved, the luminous flux of the light rays emitted by the first light source module and the second light source module simultaneously enters the optical-mechanical system, the luminous flux projected to the optical-mechanical system is increased, and the output brightness of the optical-mechanical system is improved.

The semiconductor laser is used as an excitation light source, the laser has the advantages of high energy density and small optical expansion, the fluorescent powder is excited to generate high-efficiency fluorescence, and a light source with high energy density can be obtained. Therefore, the novel light source system applied to the field of illumination is particularly suitable for being applied to occasions with higher requirements on light beam quality, and has good popularization effect on expanding the application field of laser fluorescent powder light sources.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable 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 applied to 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

1. A light source system, comprising:

the first light source module is used for generating a first light ray;

the second light source module is used for generating a second light ray; and

a light combining device;

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 first light source module and the second light source module respectively comprise a laser module and a shaping element, and the shaping element is used for shaping laser emitted by the laser module so that the shape and size of a laser spot are matched with the shape and size of the light incident surface of the optical-mechanical system;

the first light source module and the second light source module respectively comprise a fluorescent wheel, an area beam splitter and a scattering sheet, the blue laser transmitted by the area beam splitter emitted from the shaping element is incident on the scattering sheet to reduce the coherence of the blue laser, and the blue laser reflected by the area beam splitter emitted from the shaping element is incident on the fluorescent wheel to excite yellow fluorescence;

the light combining device comprises two reflecting surfaces which are vertical to each other and in seamless contact, and the first light and the second light are reflected by the two reflecting surfaces to form two light spots which are vertically arranged and have no gap respectively.

2. The light source system of claim 1, wherein the opto-mechanical system comprises an opto-mechanical square bar, the input surface is formed at an entrance of the opto-mechanical square bar, and the first light spot, the second light spot, and the input surface are substantially rectangular.

3. The light source system of claim 2, wherein the first light spot and the second light spot each occupy half of the input surface.

4. The light source system of claim 3, wherein the first light spot and the second light spot are projected to two rectangles divided along the center of the short side or the center of the long side of the light incident surface, respectively.

5. The light source system of claim 1, further comprising a first reflective element and a second reflective element symmetrically disposed along a plane, wherein the first reflective element reflects the first light to the light combining device to form the first light spot, and the second reflective element reflects the second light to the light combining device to form the second light spot.

6. The light source system of claim 5, wherein the light combining device comprises a pair of reflectors symmetrically disposed with respect to the plane and perpendicular to the plane, two reflective surfaces of the light combining device are reflective surfaces of the pair of reflectors and form an angle of 45 degrees with the plane, respectively, and the first reflective element emits the first light and the second reflective element emits the second light to the reflective surfaces of the pair of reflectors, respectively.

7. The light source system of claim 5, wherein the pair of reflectors are integrally formed and L-shaped.

8. The light source system of claim 5, wherein the light combining device comprises a reflecting prism, the cross section of the reflecting prism is an isosceles right triangle, the two right-angle surfaces of the reflecting prism are the two reflecting surfaces, the two right-angle surfaces of the reflecting prism respectively form an angle of 45 degrees with the plane, and the first reflecting element reflects the first light ray and the second reflecting element reflects the second light ray to the two right-angle surfaces of the reflecting prism respectively.

9. The light source system of claim 8, wherein the right-angle side of the reflecting prism is coated with a high-reflectivity film.

10. The light source system of claim 5, wherein the light combining device comprises two reflecting prisms symmetrically disposed along the plane and having a cross section of an isosceles right triangle, inclined surfaces of the two reflecting prisms are the two reflecting surfaces, an included angle between each inclined surface of the two reflecting prisms and the plane is 45 degrees, the first reflecting element reflects the first light and the second reflecting element reflects the second light to a right-angle surface of the two reflecting prisms, and each inclined surface of each reflecting prism reflects the incident light and emits the reflected light from the other right-angle surface.

11. The light source system of claim 10, wherein the facets of each of the reflecting prisms are coated with a high-reflectivity film.

12. The light source system of claim 10, wherein each of the reflecting prisms has polished sides.

13. The light source system according to any one of claims 1 to 12, wherein a double telecentric lens system is further disposed between the light combining device and the optical mechanical system, and the first light spot and the second light spot are 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.