Light source device and optical imaging system

Abstract

The invention discloses a light source device and an optical imaging system. The light source device comprises a first laser module, a fluorescence generation module and a first light combination part. The first laser module comprises a first laser unit and a second laser unit, and the first laser unit and the second laser unit are integrated in the same laser generator; the first laser unit is used for generating first laser, the second laser unit is used for generating second laser, and the wavelength of the first laser is smaller than that of the second laser. The fluorescence generation module is arranged on a light path where the first laser is located and used for generating first specified fluorescence under excitation of the first laser. The first light combination part is arranged on a light path where the first specified fluorescence and the second laser are located. Since the first laser is not only used as the primary light in the light source device, but also used as the exciting light of the first specified fluorescence, the multiplexing of the first laser is realized, so that additional monochromatic laser does not need to be arranged in the light source device to excite the fluorescence, and the hardware cost of the light source device can be saved.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and more specifically, to a light source device and an optical imaging system. Background Art

[0002] For projection equipment, the performance of its internal optical engine is an important factor affecting the quality of projection imaging. Among them, the most important factors affecting projection quality, including brightness and color, depend on the light source used by the optical engine.

[0003] At present, the main light source used in projection equipment is RGB laser light source, which has the advantage of wide color gamut. However, for projection equipment using small F-number lenses, RGB light source laser cannot provide obvious brightness gain. Therefore, in order to achieve the same light source brightness, it is necessary to increase the number of red and green lasers used, but the high price of red and green lasers will increase the cost of projection equipment. In addition, the speckle in the RGB laser light source will also reduce the quality of the projected image.

[0004] In order to solve the above problems, researchers have proposed a hybrid light source of laser plus fluorescence, which adds a fluorescent light source to the laser light source to improve the light source brightness of the projection device. In existing optical engines, a single monochromatic laser (for example, a blue laser) is usually used to excite phosphors to provide fluorescence. Since the monochromatic laser is only used to excite fluorescence, the energy utilization efficiency of the monochromatic laser is low. Summary of the invention

[0005] Embodiments of the present application provide a light source device and an optical imaging system.

[0006] According to the first aspect of the present application, an embodiment of the present application provides a light source device, which includes a first laser module, a fluorescence generating module and a first light combining component. The first laser module includes a first laser unit and a second laser unit, and the first laser unit and the second laser unit are integrated in the same laser generator; the first laser unit is used to generate a first laser, and the second laser unit is used to generate a second laser, and the wavelength of the first laser is smaller than the wavelength of the second laser. The fluorescence generating module is arranged on the optical path where the first laser is located, and is used to generate a first specified fluorescence under the excitation of the first laser. The first light combining component is arranged on the optical path where the first specified fluorescence and the second laser are located, and is used to combine the first specified fluorescence and the second laser to generate an output light.

[0007] According to the second aspect of the present application, an embodiment of the present application also provides an optical imaging system, which includes the above-mentioned light source device and a light modulator, wherein the light source device is used to generate outgoing light; the light modulator is arranged on the optical path where the outgoing light is located.

[0008] The present application provides a light source device and an optical imaging system, wherein the light source device includes a first laser module, a fluorescence generating module, and a first light combining component. The first laser unit and the second laser unit in the first laser module are integrated into the same laser generator. For example, the laser generator can be a multi-color packaged RGB laser, and the first laser generated by the first laser unit and the second laser generated by the second laser unit are respectively two colors of light in the RGB laser. For example, the first laser can be a blue laser, and the second laser can be a green laser. Therefore, the first laser unit and the second laser unit in the present application can be used as two laser units providing primary colors in the light source device. In addition, the first laser unit and the second laser unit are integrated into the same laser generator, which also makes it easier to debug and install the laser optical path.

[0009] The fluorescence generating module will generate the first designated fluorescence under the excitation of the first laser. Therefore, the first laser in the present application is not only used as the primary color light in the light source device, but also as the excitation light of the first designated fluorescence, so that the first laser is reused, so that there is no need to set an additional monochromatic laser in the light source device to excite the fluorescence, which can save the hardware cost of the light source device and simplify the optical path design of the light source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a schematic diagram of the structure of the light source device provided in an embodiment of the present application.

[0012] Figure 2 yes Figure 1 Schematic diagram of the structure of the first laser module.

[0013] Figure 3 This is another structural schematic diagram of the light source device provided in an embodiment of the present application.

[0014] Figure 4 yes Figure 3 Schematic diagram of the structure of the fluorescent wheel.

[0015] Figure 5 yes Figure 1 Schematic diagram of the structure of the first light combining component.

[0016] Figure 6 This is another structural schematic diagram of the light source device provided in an embodiment of the present application.

[0017] Figure 7It is a schematic diagram of the first light spot and the second light spot provided in an embodiment of the present application.

[0018] Figure 8 This is another structural schematic diagram of the light source device provided in the embodiment of the present application.

[0019] Fig. 9 This is another structural schematic diagram of the light source device provided in the embodiment of the present application.

[0020] Fig.10 It is a schematic diagram of the structure of the optical imaging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0022] An embodiment of the present application provides a light source device 100, which is a hybrid light source obtained by combining a laser light source and a fluorescent light source. It has the advantages of high light source brightness, simple optical path and low hardware cost. It can be widely used in projection equipment (for example, micro projectors, short-focus projectors), laser TVs, engineering projectors, laser splicing walls and other equipment.

[0023] See also Figure 1 and Figure 2 , the light source device 100 may include a first laser module 10, a fluorescent generating module 20 and a first light combining member 30. Among them, the first laser module 10 includes a first laser unit 120 and a second laser unit 140, and the first laser unit 120 and the second laser unit 140 are integrated in the same laser generator 15; the first laser unit 120 is used to generate a first laser L1, and the second laser unit 140 is used to generate a second laser L2, and the wavelength L1 of the first laser L1 is less than the wavelength of the second laser L2. For example, the above-mentioned laser generator 15 can be a multi-color packaged RGB laser, and the first laser L1 generated by the first laser unit 120 and the second laser L2 generated by the second laser unit 140 are respectively two colors of light in the RGB laser. For example, the first laser L1 can be a blue laser, and the second laser L2 can be a green laser. Therefore, the first laser unit 120 and the second laser unit 140 in the present application can be used as two laser units providing primary colors in the light source device 100. In addition, the first laser unit 120 and the second laser unit 140 are integrated into the same laser generator 15, which also makes it easier to debug and install the laser optical path.

[0024] The fluorescence generating module 20 is arranged on the optical path of the first laser L1, and is used to generate the first designated fluorescence F1 under the excitation of the first laser L1. The first light combining element 30 is arranged on the optical path of the first designated fluorescence F1 and the second laser L2, and is used to combine the first designated fluorescence F1 and the second laser L2 to generate the output light O.

[0025] Therefore, the first laser L1 in the present application not only serves as the primary color light in the light source device 100, but also serves as the excitation light of the first designated fluorescence F1, thereby realizing the multiplexing of the first laser L1, so that there is no need to set up an additional monochromatic laser in the light source device 100 to excite fluorescence, which can save the hardware cost of the light source device 100 and simplify the optical path design of the light source device 100.

[0026] Each component module in the light source device 100 is described in detail below.

[0027] In this embodiment, the first laser module 10 may include a first laser unit 120 and a second laser unit 140, which are integrated in the same laser generator 15 and are spaced apart in the first direction X. The first laser unit 120 is used to generate the first laser L1, and the second laser unit 140 is used to generate the second laser L2, and the wavelength of the first laser L1 is smaller than the wavelength of the second laser L2. For example, the first laser L1 may be a blue laser, and the second laser L2 may be a green laser.

[0028] Specifically, the first laser unit 120 may include one or more first laser sub-units 1200, and the one or more first laser sub-units 1200 are used to generate the first laser L1. The second laser unit 140 may include one or more second laser sub-units 1400, and the one or more second laser sub-units 1400 are used to generate the second laser L2. Figure 2 In the illustrated embodiment, the number of the first laser subunits 1200 is two, the two first laser subunits 1200 are integrated in the laser generator 15, and are spaced apart in the first direction X. The number of the second laser subunits 1400 is three, the three second laser subunits 1400 are integrated in the laser generator 15, and are spaced apart in the first direction X.

[0029] In some possible embodiments, the first laser module 10 may further include a fourth laser unit 160, and the first laser unit 120, the second laser unit 140 and the fourth laser unit 160 are integrated in the same laser generator 15. The fourth laser unit 160 is used to generate a fourth laser L4, and the wavelength of the fourth laser L4 is greater than the wavelength of the second laser L2. For example, the fourth laser L4 can be a red laser. Therefore, the laser generator 15 in this embodiment is a multi-color packaged RGB laser, and the first laser L1, the second laser L2 and the fourth laser L4 are used to provide three primary colors of blue, green and red, respectively. The R&D personnel meet the requirements of high brightness and high color by adjusting the current and duty cycle of the three lasers, thereby realizing dynamic brightness, color gamut and energy efficiency switching, and improving the imaging quality of the optical imaging system equipped with the light source device 100.

[0030] Specifically, the fourth laser unit 160 may include one or more fourth laser sub-units 1600, and the one or more fourth laser sub-units 1600 are used to generate the fourth laser L4. Figure 2 In the illustrated embodiment, the number of the fourth laser subunits 1600 is four, and the four fourth laser subunits 1600 are integrated in the laser generator 15 and arranged at intervals in the first direction X to form a row of laser subunit groups. The two first laser subunits 1200 and the three second laser subunits 1400 are arranged at intervals in the first direction X to form another row of laser subunit groups, and the two rows of laser subunit groups are arranged at intervals in the second direction Y. The second direction Y is substantially perpendicular to the first direction X.

[0031] It is not difficult to understand here that the above-mentioned configuration of the first laser unit 120, the second laser unit 140 and the fourth laser unit 160 is only schematic, and R&D personnel can adjust the number of laser sub-units in each laser unit and the corresponding arrangement according to actual needs.

[0032] In some possible embodiments, a laser light diffuser (not shown in the figure) may be further provided in the laser generator 15, and the laser light diffuser may be used to eliminate speckles in the laser and improve the imaging quality. Exemplarily, the laser light diffuser may be a light diffuser sheet, a light diffuser wheel, and the like.

[0033] In this embodiment, the light source device 100 may also include a second light combining component 40, which is arranged between the fluorescence generating module 20 and the first light combining component 30, and is located on the optical path where the first laser L1 and the first designated fluorescence F1 are located. The second light combining component 40 is used to guide the first laser L1 to the fluorescence generating module 20, and guide the first designated fluorescence F1 to the first light combining component 30, so as to play the role of transmitting the first laser L1 and the first designated fluorescence F1.

[0034] exist Figure 1In the illustrated embodiment, the second light combining component 40 is used to reflect the first laser L1 to the fluorescence generating module 20, and transmit the first designated fluorescence F1 to the first light combining component 30. Specifically, the second light combining component 40 can be a filter, and the surface of the filter can be provided with a film layer (not shown in the figure) that reflects the first laser L1 and transmits the first designated fluorescence F1. For example, in the case where the first designated fluorescence F1 is green fluorescence, the above-mentioned film layer can be a film layer that reflects blue and transmits green.

[0035] In some other possible embodiments, the second light combining component 40 can also be used to transmit the first laser L1 to the fluorescence generating module 20, and reflect the first designated fluorescence F1 to the first light combining component 30. Specifically, the transmission and reflection characteristics of the second light combining component 40 can be determined by the R&D personnel based on the specific placement positions of the first laser module 10, the fluorescence generating module 20 and the first light combining component 30, and this embodiment does not specifically limit this.

[0036] In this embodiment, the fluorescence generating module 20 is disposed on the optical path of the first laser L1, and is used to generate the first designated fluorescence F1 under the excitation of the first laser L1. Figure 3 The fluorescence generating module 20 may include a fluorescence wheel 210 and a driving member 230, wherein the driving member 230 is connected to the fluorescence wheel 210 in a transmission manner, and the driving member 230 is used to drive the fluorescence wheel 210 to rotate. Specifically, the driving member 230 may be a rotating driving member, such as a rotating motor, a rotating steering gear, and the like.

[0037] The fluorescent wheel 210 is disposed on the optical path of the first laser L1 and is used to generate the first designated fluorescent light F1 under the excitation of the first laser L1. Figure 4 The fluorescent wheel 210 may include a fluorescent generating portion 2100 and a first scattering portion 2120 that are adjacently arranged. The above-mentioned "adjacently arranged" should be understood as the surfaces of the two smoothly transitioning to each other at the adjacent position, such as the continuous gap is smaller than a specified value, or the two are located in the same plane, etc.; or it can be understood as the two together forming a specific appearance contour (for example, a circular contour).

[0038] In some possible embodiments, the number of the fluorescent generating part 2100 and the first scattering part 2120 may be multiple, and the multiple fluorescent generating parts 2100 and the multiple first scattering parts 2120 are disposed around the rotation center O of the fluorescent wheel 210 and are arranged alternately in sequence. Figure 4 In the illustrated embodiment, the number of the fluorescent light generating parts 2100 and the number of the first scattering parts 2120 are both two.

[0039] When the fluorescence generating unit 2100 rotates to the optical path where the first laser L1 is located, the fluorescence generating unit 2100 is used to generate the first designated fluorescence F1 under the excitation of the first laser L1, and reflect the first designated fluorescence F1 to the second light combining component 40. When the first scattering unit 2120 rotates to the optical path where the first laser L1 is located, the first scattering unit 2120 is used to scatter the first laser L1 and transmit it to the second light combining component 40, and the second light combining component 40 is also used to guide the first laser L1 to the first light combining component 30. Therefore, the first laser L1 in this embodiment is not only used to excite fluorescence, but also participates in light combining with fluorescence, thereby realizing the multiplexing of the first laser L1. Figure 3 In the illustrated embodiment, the second light combining element 40 is specifically configured to reflect the first laser light L1 to the first light combining element 30 .

[0040] Specifically, a phosphor layer may be provided on the surface of the fluorescence generating unit 2100, and the phosphor layer generates a first designated fluorescence F1 under the excitation of the first laser L1. For example, the phosphor layer may be a green phosphor layer, and generates green fluorescence under the excitation of the first laser L1. Figure 4 In the illustrated embodiment, the fluorescence generating part 2100 may include a first generating part 2101 and a second generating part 2103, wherein the first generating part 2101, the second generating part 2103 and the first scattering part 2120 are arranged adjacent to each other in sequence and together surround the rotation center O of the fluorescence wheel 210. A green phosphor layer may be provided on the surface of the first generating part 2101, and a red phosphor layer may be provided on the surface of the second generating part 2103, so that a mixed fluorescence of red fluorescence and green fluorescence may be generated during the rotation of the fluorescence wheel 210.

[0041] A scattering medium (for example, scattering particles) may be provided on the surface or inside of the first scattering portion 2120. When the first laser L1 is incident on the first scattering portion 2120, scattering occurs while being transmitted, which can eliminate the speckle in the first laser L1 to a certain extent and improve the imaging quality.

[0042] In some possible embodiments, the fluorescent wheel 210 may further include a substrate (not shown in the figure), which is used to fix the fluorescent generating part 2100 and the first scattering part 2120. Specifically, the substrate may be made of metal (for example, aluminum, copper, etc.) to achieve heat dissipation of the fluorescent wheel 210. Furthermore, a side of the substrate facing away from the second light combining member 40 may be provided with a plurality of heat dissipation fins, which are arranged in a spaced manner to further achieve heat dissipation of the fluorescent wheel 210 and ensure the service life of the fluorescent wheel 210.

[0043] Please refer again Figure 3, the fluorescence generating module 20 may further include a first collecting lens group 250, and the first collecting lens group 250 is disposed between the fluorescence wheel 210 and the second light combining component 40, and is located on the optical path where the first laser L1 and the first designated fluorescence F1 are located. On the one hand, the first collecting lens group 250 can converge the first laser L1, so that it can be accurately incident on the area where the fluorescence generating part 2100 and the first scattering part 2120 are located. On the other hand, the first collecting lens group 250 can also collect the first designated fluorescence F1 to improve the energy utilization efficiency of the first designated fluorescence F1. Specifically, the first collecting lens group 250 may include one or more first collecting lenses 2501, and the one or more first collecting lenses 2501 are disposed on the optical path where the first designated fluorescence F1 is located. Figure 3 In the illustrated embodiment, there are two first collecting lenses 2501 , and the two first collecting lenses 2501 are sequentially arranged at intervals along the optical path where the first designated fluorescence F1 is located, so as to improve the collection efficiency of the first designated fluorescence F1 .

[0044] exist Figure 3 In the illustrated embodiment, the light source device 100 may further include a light transmission module 25, which is disposed on the optical path of the first laser L1 after being transmitted through the fluorescent wheel 210, and is used to transmit the first laser L1 to the second light combining member 40. Specifically, the light transmission module 25 may include a first reflector 251, a second reflector 253, and a third reflector 255, which are sequentially disposed on the optical path of the first laser L1 after being transmitted through the fluorescent wheel 210, and reflect the first laser L1 to the second light combining member 40.

[0045] The light transmission module 25 may further include a first lens 257 and a second lens 259, wherein the first lens 257 is disposed between the fluorescent wheel 210 and the first reflector 251, and is located on the optical path of the first laser L1. The second lens 259 is disposed between the first reflector 251 and the second reflector 253, and is located on the optical path of the first laser L1. The first lens 257 and the second lens 259 may respectively focus the first laser L1, thereby preventing the first laser L1 from diverging during the process of being transmitted to the second light combining member 40, thereby ensuring the energy utilization efficiency of the first laser L1.

[0046] exist Figure 3In the illustrated embodiment, the light source device 100 may further include a second filter 12, which is disposed on the optical path of the first laser L1, the second laser L2, and the fourth laser L4, and is used to transmit the first laser L1 to the fluorescence generating module 20, and reflect the second laser L2 and the fourth laser L4 to the first light combining component 30. Specifically, the surface of the second filter 12 may be provided with a film layer (not shown in the figure) that transmits blue and reflects red and green, and the film layer is used to transmit the first laser L1 and reflect the second laser L2 and the fourth laser L4.

[0047] In this embodiment, the first light combining element 30 is disposed on the optical path where the first designated fluorescent light F1 and the second laser light L2 are located, and is used to combine the first designated fluorescent light F1 and the second laser light L2 to generate the output light O. For example, the first light combining element 30 can transmit the second laser light L2 and reflect the first designated fluorescent light F1 to generate the output light O; for another example, the first light combining element 30 can reflect the second laser light L2 and transmit the first designated fluorescent light F1 to generate the output light O.

[0048] See also Figure 5 , the first light combining element 30 may include a body 320 and a reflective layer 340. Among them, the body 320 is roughly in the shape of a sheet (for example, a round sheet, a square sheet), and it can be made of a transparent substrate (for example, glass). The body 320 is provided with a through hole 3200, which is roughly located in the center of the body 320, and the through hole 3200 runs through the opposite sides of the body 320. The through hole 3200 can be circular, rectangular, multi-deformed, etc. In this embodiment, the through hole 3200 is used for the second laser L2 to pass through. The reflective layer 340 covers the surface of the body 320 and is located on the optical path where the first designated fluorescence F1 is located. Therefore, the first light combining element 30 in this embodiment can transmit the second laser L2 and reflect the first designated fluorescence F1. Specifically, the reflective layer 340 can be a full-band reflective film, and the full-band reflective film is plated on the surface of the body 320 using a coating process.

[0049] It is not difficult to understand here that when the first light combining member 30 combines the second laser light L2 and the first designated fluorescent light F1, the second laser light L2 can pass through the through hole 3200 on the first light combining member 30 without loss, thereby improving the light combining efficiency. In addition, the energy loss of the first designated fluorescent light F1 depends on the size of the through hole 3200, that is, the smaller the size of the through hole 3200, the more first designated fluorescent light F1 can be reflected by the reflective layer 340, so that the energy loss of the first designated fluorescent light F1 is smaller.

[0050] In some other possible embodiments, the first light combining component 30 may also be implemented by means of regional coating. Here, taking the first light combining component 30 used to transmit the second laser L2 and reflect the first designated fluorescence F1 as an example, the body of the first light combining component 30 may have a first surface and a second surface adjacent to each other (neither of which is shown in the figure), the first surface is approximately located at the center of the body, and the second surface is arranged around the periphery of the first surface. A full-band transmission film may be plated on the first surface, and the full-band transmission film is used to transmit the second laser L2. A full-band reflection film may be plated on the second surface, and the full-band reflection film is used to reflect the first designated fluorescence F1. Therefore, in this embodiment, the body of the first light combining component 30 does not need to be drilled, which can simplify the manufacturing process of the first light combining component 30 and reduce processing costs.

[0051] exist Figure 3 In the illustrated embodiment, the first light combining member 30 is also used to combine the first laser L1 and the fourth laser L4. Specifically, the through hole 3200 is also used to allow the fourth laser L4 to pass through, and the reflective layer 340 is also used to reflect the first laser L1, where the first laser L1 refers to the first laser L1 after being transmitted through the fluorescent wheel 210.

[0052] exist Figure 3 In the illustrated embodiment, the light source device 100 may further include a third scattering member 14, which is disposed between the second filter 12 and the first light combining member 30 and is located on the optical path of the second laser L2 and the fourth laser L4, and is used to eliminate speckles in the second laser L2 and the fourth laser L4, so as to improve the imaging quality of the optical imaging system equipped with the light source device 100. Exemplarily, the third scattering member 14 may be a diffuser, a diffuser wheel, and the like.

[0053] See also Figure 6 The light source device 100 may further include a second laser module 50, and the second laser module 50 and the first laser module 10 are spaced apart in the second direction Y. The second laser module 50 is used to generate a third laser L3, the wavelength of the third laser L3 is smaller than the wavelength of the second laser L2, and the wavelength of the third laser L3 and the wavelength of the first laser L1 belong to the wavelength band of the same color laser. For example, the third laser L3 may be a blue laser.

[0054] The fluorescence generating module 20 is also arranged on the optical path where the third laser L3 is located, and is also used to generate the second designated fluorescence F2 under the excitation of the third laser L3. Therefore, the second laser module 50 in this embodiment can play a role in supplementing the blue laser, thereby increasing the upper limit of the fluorescence brightness that the fluorescence generating module 20 can provide, so as to improve the overall brightness of the emitted light O. It is not difficult to understand here that the second light combining component 40 is also arranged on the optical path where the third laser L3 and the second designated fluorescence F2 are located, and is also used to guide the third laser L3 to the fluorescence generating module 20, and guide the second designated fluorescence F2 to the first light combining component 30. The first light combining component 30 is also used to combine the first designated fluorescence F1, the second designated fluorescence F2 and the second laser L2 to generate the emitted light O. For example, the first light combining component 30 is specifically used to reflect the first designated fluorescence F1 and the second designated fluorescence F2, and transmit the second laser L2. Specifically, in Figure 6 In the illustrated embodiment, the second light combining component 40 is used to reflect the third laser L3 to the fluorescence generating module 20, and transmit the second designated fluorescence F2 to the first light combining component 30. In some other possible embodiments, the second light combining component 40 can also be used to transmit the third laser L3 to the fluorescence generating module 20, and reflect the second designated fluorescence F2 to the first light combining component 30.

[0055] In some possible embodiments, the second laser module 50 may include a plurality of third laser units 520, which are spaced apart in the second direction Y and are used to generate the first sub-laser L31. Therefore, the third laser L3 in this embodiment may be regarded as a light beam formed by the confluence of a plurality of first sub-lasers L31.

[0056] exist Figure 6 In the illustrated embodiment, the light source device 100 may further include a light homogenizer 61, which is disposed between the first reflection module 60 and the second light combining member 40 and is located on the optical path where the first laser L1 and the third laser L3 are located, and is used to homogenize the first laser L1 and the third laser L3, so that the first laser L1 and the third laser L3 can be incident on the fluorescence generating module 20 as a whole beam of blue laser light, so as to improve the excitation efficiency of the fluorescence generating module 20. Specifically, the light homogenizer 61 may be a fly-eye lens.

[0057] In this embodiment, the first light spot 612 formed by the first laser L1 on the light homogenizer 61 and the second light spot 614 formed by the third laser L3 on the light homogenizer 61 do not overlap, which means that before the first laser L1 and the third laser L3 are incident on the light homogenizer 61, the two light beams are incident on the light homogenizer 61 respectively in a manner of propagating independently, rather than being combined first and then incident on the light homogenizer 61, thereby avoiding light loss caused by the combination of the two light beams.

[0058] See also Figure 7, the first light spot 612 and the second light spot 614 are symmetrical about the same axis L, so as to improve the light homogenization of the light homogenizer 61 to the first laser L1 and the third laser L3. The axis L can roughly coincide with the symmetry axis of the light incident surface (not shown in the figure) of the light homogenizer 61, so that the first laser L1 and the third laser L3 can be incident from the center of the light homogenizer 61, further improving the light homogenization effect of the two paths of light. Specifically, Figure 7 In the illustrated embodiment, the first light spot 612 and the second light spot 614 are respectively axially symmetrical about the axis L. In some other possible embodiments, the first light spot 612 and the second light spot 614 may also be respectively centrally symmetrical about the axis L.

[0059] It should be noted here that in the actual optical path, when the first laser L1 and the third laser L3 are incident on the fluorescence generating part 2100 on the fluorescence wheel 210 as excitation light, there may be only one path of fluorescence excited and generated, and the fluorescence path includes the first designated fluorescence F1 and the second designated fluorescence F2. Therefore, the first designated fluorescence F1 and the second designated fluorescence F2 in this embodiment are only used to distinguish the excitation light generated by them, that is, the first designated fluorescence F1 is excited by the first laser L1, and the second designated fluorescence F2 is excited by the third laser L3. In the actual optical path, there may not be two paths of light corresponding to the first designated fluorescence F1 and the second designated fluorescence F2.

[0060] In addition, when the first laser L1 and the third laser L3 are incident on the first scattering portion 2120 on the fluorescent wheel 210, the first laser L1 and the third laser L3 are scattered and transmitted through the first scattering portion 2120, and then pass through the first lens 257, the first reflector 251, the second lens 259, the second reflector 253, the third reflector 255 and the second light combining component 40 in sequence, and then are incident on the reflective layer 340 of the first light combining component 30, and then are combined with the first designated fluorescence F1, the second designated fluorescence F2, the second laser L2 and the fourth laser L4.

[0061] In this embodiment, the light source device 100 may further include a first reflection module 60 for reflecting the blue laser to the second light combining component 40 , and then the blue laser is incident on the fluorescent wheel 210 as excitation light of the fluorescent wheel 210 under the reflection of the second light combining component 40 .

[0062] exist Figure 3 In the illustrated embodiment, the blue laser includes only the first laser L1, and the first reflection module 60 may include a single reflection element (e.g., a reflector), which is disposed on the optical path of the first laser L1 after being transmitted through the second filter 12, and is used to reflect the first laser L1 to the second light combining element 40.

[0063] exist Figure 6In the illustrated embodiment, the blue laser includes a first laser L1 and a third laser L3, and the first reflection module 60 may include a first reflection member 610 and a second reflection member 630. The first reflection member 610 is disposed on the optical path where the first laser L1 is located, and is used to reflect the first laser L1 to the light homogenizer 61. The second reflection member 630 is disposed on the optical path where a plurality of first sub-lasers L31 are located, and is used to reflect a plurality of first sub-lasers L31 to the light homogenizer 61. Specifically, the first reflection member 610 and the second reflection member 630 may both be reflectors. This embodiment adopts a method in which different reflection members reflect different lasers, so that the first laser L1 and the third laser L3 can be independently reflected to the light homogenizer 61, respectively, to avoid light loss caused by reflecting the first laser L1 and the third laser L3.

[0064] See also Figure 8 The light source device 100 may further include a first filter 16, which is disposed on the optical path of the first laser L1, the second laser L2, and the fourth laser L4, and is used to transmit the first laser L1 to the fluorescent generating module 20, reflect the second laser L2 to the first light combining component 30, and transmit the fourth laser L4 to the second light combining component 40. Specifically, a film layer (not shown in the figure) that transmits red, blue, and reflects green may be provided on the surface of the first filter 16, and the film layer is used to transmit the first laser L1 and the fourth laser L4 and reflect the second laser L2.

[0065] Therefore, the fourth laser L4 in this embodiment participates in the light combining of the first light combining component 30 in a roundabout manner, so that only the second laser L2 passes through the through hole 3200 of the first light combining component 30. Since the optical expansion amount of the second laser L2 (that is, the green laser) is much smaller than the optical expansion amount of the fourth laser L4. The "optical expansion amount" here can be understood as that, under the condition of propagating the same distance, the spot area formed by the fourth laser L4 is larger than the spot area formed by the second laser L2. Therefore, compared with the solution in which both the second laser L2 and the fourth laser L4 pass through the through hole 3200, in the case in which only the second laser L2 passes through the through hole 3200, the size of the through hole 3200 can be further reduced, so that more of the first designated fluorescence F1 and the second designated fluorescence F2 can be reflected by the reflective layer 340, thereby reducing the energy loss of the first designated fluorescence F1 and the second designated fluorescence F2.

[0066] exist Figure 8In the illustrated embodiment, the light source device 100 may further include a third reflector 72 and a third light combining member 74, wherein the third reflector 72 is disposed on the optical path of the fourth laser light L4 after being transmitted through the first optical filter 16, and is used to reflect the fourth laser light L4 to the third light combining member 74. The third light combining member 74 is disposed on the optical path of the fourth laser light L4 and the first laser light L1 and the third laser light L3 after being transmitted through the first scattering portion 2120, and is used to transmit the fourth laser light L4 to the second light combining member 40, and reflect the first laser light L1 and the third laser light L3 to the second light combining member 40. The second light combining member 40 is also used to reflect the fourth laser light L4 to the first light combining member 30.

[0067] Therefore, in this embodiment, by setting the third reflector 72 and the third light combining element 74, the fourth laser L4 can be combined with the first laser L1 and the third laser L3 after being transmitted through the first scattering portion 2120, so that the combined light can pass through the second lens 259, the second reflector 253, the third reflector 255 and the second light combining element 40 in sequence, and then be incident on the reflective layer 340 of the first light combining element 30, and then be combined with the first designated fluorescence F1, the second designated fluorescence F2 and the second laser L2, thereby realizing the reuse of components such as the second lens 259, the second reflector 253, the third reflector 255 and the second light combining element 40. On the one hand, the optical path can be simplified, making the light source device 100 more compact, and on the other hand, the hardware cost of the light source device 100 can be reduced. Specifically, the third reflector 72 may be a reflector, and the third light combining element 74 may be a dichroic film, the surface of which may be provided with a film layer (not shown in the figure) that transmits red and reflects blue, which is used to transmit the fourth laser L4 and reflect the first laser L1 and the third laser L3.

[0068] Specifically, in Figure 8 In the illustrated embodiment, the second light combining member 40 is used to reflect the first laser L1, the third laser L3 and the fourth laser L4, and transmit the first designated fluorescence F1 and the second designated fluorescence F2. As an embodiment, the second light combining member 40 may include a body, a first film layer and a second film layer. Among them, the body may have a third surface and a fourth surface adjacent to each other (neither of which is shown in the figure), the third surface is approximately located at the center of the body, and the fourth surface is arranged around the periphery of the third surface. A first film layer may be plated on the third surface, and the first film layer is located on the optical path where the fourth laser L4 is located, and is used to reflect the fourth laser L4. For example, the first film layer may be a red laser band reflective film layer. A second film layer may be plated on the fourth surface, and the second film layer is located on the optical path where the first laser L1, the third laser L3, the first designated fluorescence F1 and the second designated fluorescence F2 are located, and is used to reflect the first laser L1 and the third laser L3, and transmit the first designated fluorescence F1 and the second designated fluorescence F2. For example, the second film layer may be an anti-blue and yellow film layer.

[0069] exist Figure 8 In the illustrated embodiment, the light source device 100 may further include a first scattering member 81 and a second scattering member 83, wherein the first scattering member 81 is disposed between the first optical filter 16 and the third reflector 72 and is located on the optical path where the fourth laser L4 is located, and is used to eliminate speckles in the fourth laser L4, so as to improve the imaging quality of the optical imaging system equipped with the light source device 100. Exemplarily, the first scattering member 81 may be a diffuser, a diffuser wheel, and the like. The second scattering member 83 is disposed between the first optical filter 16 and the first light combining member 30 and is located on the optical path where the second laser L2 is located, and is used to eliminate speckles in the second laser L2, so as to improve the imaging quality of the optical imaging system equipped with the light source device 100. Exemplarily, the second scattering member 83 may be a diffuser, a diffuser wheel, and the like.

[0070] exist Figure 8 In the illustrated embodiment, the light source device 100 may further include a third lens 812, a fourth lens 814 and a fifth lens 816, wherein the third lens 812 is disposed between the first filter 16 and the first scattering element 81, and is located on the optical path where the fourth laser L4 is located. The fourth lens 814 is disposed between the first scattering element 81 and the third reflector 72, and is located on the optical path where the fourth laser L4 is located. The fifth lens 816 is disposed between the third reflector 72 and the third light combining element 74, and is located on the optical path where the fourth laser L4 is located. The third lens 812, the fourth lens 814 and the fifth lens 816 can respectively focus the fourth laser L4, thereby avoiding the phenomenon of light divergence of the fourth laser L4 during the process of being transmitted to the second light combining element 40, thereby ensuring the energy utilization efficiency of the fourth laser L4.

[0071] In some possible embodiments, see Figure 4 and Fig. 9 , the fluorescent wheel 210 may further include a second scattering portion 2140, which is disposed adjacent to the fluorescent generating portion 2100 and the first scattering portion 2120, respectively. The second scattering portion 2140 is disposed on the optical path of the fourth laser L4 transmitted through the third light combining member 74 and the first laser L1 and the third laser L3 reflected through the third light combining member 74. A scattering medium (for example, scattering particles) may be disposed on the surface or inside of the second scattering portion 2140. When the first laser L1, the third laser L3 and the fourth laser L4 are incident on the second scattering portion 2140, scattering occurs while transmission occurs, which can eliminate the speckle in the laser to a certain extent and improve the imaging quality. Specifically, the second scattering portion 2140 is disposed around the periphery of the plurality of fluorescent generating portions 2100 and the plurality of first scattering portions 2120, the plurality of fluorescent generating portions 2100 and the plurality of first scattering portions 2120 constitute the inner ring of the fluorescent wheel 210, and the second scattering portion 2140 constitutes the outer ring of the fluorescent wheel 210.

[0072] Therefore, when the driving member 230 drives the fluorescent wheel 210 to rotate, on one hand, the fluorescent wheel 210 can generate fluorescence under the excitation of the first laser L1 and the third laser L3; on the other hand, the fluorescent wheel 210 can also transmit the first laser L1, the third laser L3 and the fourth laser L4, so that the first laser L1, the third laser L3 and the fourth laser L4 participate in the light combination; on another hand, the fluorescent wheel 210 can also scatter the first laser L1, the third laser L3 and the fourth laser L4, thereby eliminating the speckle in the laser. Figure 8 Compared with the embodiment shown, the third lens 812, the first scattering element 81 and the fourth lens 814 are no longer required on the optical path where the fourth laser L4 is located, which can simplify the optical path, make the light source device 100 more compact, and reduce the hardware cost of the light source device 100.

[0073] In this example, please refer again to Figure 3 , 6 , 7 and 8, the light source device 100 may further include a first converging lens group 85 and a second converging lens group 87. The first converging lens group 85 is disposed between the first laser module 10 and the first light combining member 30, and is located on the optical path where the second laser L2 is located. The second converging lens group 87 is disposed between the fluorescence generating module 20 and the first light combining member 30, and is located on the optical path where the first designated fluorescence F1 is located, and the equivalent focal length of the first converging lens group 85 is smaller than the equivalent focal length of the second converging lens group 87.

[0074] On the one hand, the first converging lens group 85 can play a role in converging the second laser L2. For example, when the first light combining component 30 is placed near the focus of the first converging lens group 85, the spot area of ​​the second laser L2 incident on the first light combining component 30 can be reduced, thereby reducing the size of the area on the first light combining component 30 used to transmit or reflect the second laser L2, so as to reduce the light combining loss of the first designated fluorescence F1. In addition, due to the presence of the first converging lens group 85, the spot area of ​​the second laser L2 will continue to increase after being emitted through the first light combining component 30. When the second laser L2 passes through the light homogenizing device (for example, a compound eye lens), the larger spot area can enable the second laser L2 to achieve multiple light splitting, thereby improving the light homogenizing effect of the second laser L2 and ensuring the imaging quality of the optical imaging system equipped with the light source device 100.

[0075] On the other hand, since the equivalent focal length of the first converging lens group 85 is smaller than the equivalent focal length of the second converging lens group 87, and the first designated fluorescence F1 has a larger light spot, the light spot area of ​​the second laser L2 incident on the first light combining component 30 is much smaller than the light spot area of ​​the first designated fluorescence F1 incident on the first light combining component 30, thereby further reducing the light combining loss of the first designated fluorescence F1 and improving the light combining efficiency of the two light paths.

[0076] Specifically, the first converging lens group 85 and the second converging lens group 87 may include a single lens, or may include a plurality of lenses. In some possible embodiments, the first converging lens group 85 may include a first converging lens 850, and the second converging lens group 87 may include a second converging lens 870, and the focal length of the first converging lens 850 is less than the focal length of the second converging lens 870. Among them, the first converging lens 850 and the second converging lens 870 may be convex lenses, respectively. Therefore, the first converging lens group 85 and the second converging lens group 87 in this embodiment include a single lens, respectively, which can make the light source device 100 more compact and easy to realize miniaturized design.

[0077] exist Figure 3 In the illustrated embodiment, the first condensing lens 850 is disposed on the optical path where the second laser light L2 and the fourth laser light L4 are located, and the second condensing lens 870 is disposed on the optical path where the first laser light L1 and the first designated fluorescent light F1 are located.

[0078] exist Figure 6 In the illustrated embodiment, the first converging lens 850 is disposed on the optical path of the second laser L2 and the fourth laser L4, and the second converging lens 870 is disposed on the optical path of the first laser L1, the third laser L3, the first designated fluorescence F1, and the second designated fluorescence F2.

[0079] exist Figure 8 and Fig. 9 In the illustrated embodiment, the first converging lens 850 is disposed on the optical path of the second laser L2, and the second converging lens 870 is disposed on the optical path of the first laser L1, the third laser L3, the fourth laser L4, the first designated fluorescence F1, and the second designated fluorescence F2.

[0080] See also Fig.10 The present application also provides an optical imaging system 900, which is provided with the above-mentioned light source device 100, and can be widely used in projection equipment (for example, micro projectors, short-throw projectors), laser TVs, engineering projectors, laser mosaic walls and other equipment. Fig.10 In the illustrated embodiment, the optical imaging system 900 may include the above-mentioned light source device 100 , a relay module 910 , a light homogenization module 920 , a prism module 930 and a light modulator 940 .

[0081] The light source device 100 is used to generate an outgoing light O. The specific structure of the light source device 100 can refer to the relevant description in the above embodiment. The relay module 910 is arranged on the optical path where the outgoing light O is located, and is used to transmit the outgoing light O. Specifically, the relay module 910 may include a single lens or a lens group composed of multiple lenses. Fig.10 In the illustrated embodiment, the lens module 910 includes a reflector 9120 and a lens 9140. The reflector 9120 and the lens 9140 are sequentially arranged on the optical path of the outgoing light O, wherein the reflector 9120 is used to adjust the outgoing direction of the outgoing light O, and the lens 9140 has a converging effect on the outgoing light O to improve the energy utilization efficiency of the outgoing light O.

[0082] The light homogenization module 920 is disposed between the relay module 910 and the prism module 930, and is used to homogenize the outgoing light O so that the brightness distribution of the outgoing light O is more uniform. Specifically, the light homogenization module 920 can be a light homogenization rod or a fly-eye lens.

[0083] The prism module 930 is disposed between the light homogenization module 920 and the light modulator 940, and is used to reflect the outgoing light O and focus it on the light modulator 940. The light modulator 940 is used to perform image modulation on the light and form light carrying image information. The prism module 930 is also used to transmit the light carrying image information to the projection area, such as a wall, a projection screen, and the like.

[0084] Specifically, the light modulator 940 can be a digital micromirror device (DMD), which is composed of a digital micromirror array, each digital micromirror constitutes a modulation unit, and a modulation unit is used to modulate the image corresponding to a pixel. Each digital micromirror is flipped under the drive of the driving signal generated by the control device, and the number of flips of each digital micromirror is determined by the driving signal. The flipped digital micromirror modulates the light reflected by the prism module 930 and forms light carrying image information. In some other possible embodiments, the light modulator 940 can also be a HTPSLCD display chip, a reflective LCD device LCOS, etc. This embodiment does not limit the specific implementation method of the light modulator 940.

[0085] The present embodiment provides a light source device 100 and an optical imaging system 900 equipped with the light source device 100, wherein the light source device 100 may include a first laser module 10, a fluorescence generating module 20 and a first light combining component 30. The first laser module 10 includes a first laser unit 120 and a second laser unit 140, and the first laser unit 120 and the second laser unit 140 are integrated in the same laser generator 15; the first laser unit 120 is used to generate a first laser L1, and the second laser unit 140 is used to generate a second laser L2, and the wavelength L1 of the first laser L1 is smaller than the wavelength of the second laser L2. The fluorescence generating module 20 is arranged on the optical path where the first laser L1 is located, and is used to generate a first designated fluorescence F1 under the excitation of the first laser L1. The first light combining component 30 is arranged on the optical path where the first designated fluorescence F1 and the second laser L2 are located, and is used to combine the first designated fluorescence F1 and the second laser L2 to generate an output light O.

[0086] Therefore, the first laser L1 in the present application not only serves as the primary color light in the light source device 100, but also serves as the excitation light of the first designated fluorescence F1, thereby realizing the multiplexing of the first laser L1, so that there is no need to set up an additional monochromatic laser in the light source device 100 to excite fluorescence, which can save the hardware cost of the light source device 100 and simplify the optical path design of the light source device 100.

[0087] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0088] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0089] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light source device, characterized in that: include: A first laser module includes a first laser unit and a second laser unit, wherein the first laser unit and the second laser unit are integrated in the same laser generator; the first laser unit is used to generate a first laser, and the second laser unit is used to generate a second laser, and the wavelength of the first laser is smaller than the wavelength of the second laser; A fluorescence generating module, arranged on the optical path where the first laser is located, and used for generating a first designated fluorescence under the excitation of the first laser; as well as The first light combining element is disposed on the optical path of the first designated fluorescent light and the second laser, and is used for combining the first designated fluorescent light and the second laser to generate output light.

2. The light source device according to claim 1, characterized in that: The light source device also includes a second light combining component, which is arranged between the fluorescence generating module and the first light combining component and is located on the optical path where the first laser and the first designated fluorescence are located, and is used to guide the first laser to the fluorescence generating module and guide the first designated fluorescence to the first light combining component.

3. The light source device according to claim 2, characterized in that: The light source device further comprises a second laser module, wherein the second laser module is used to generate a third laser, wherein the wavelength of the third laser is smaller than the wavelength of the second laser; The fluorescence generating module is also arranged on the optical path where the third laser is located, and is used to generate a second designated fluorescence under the excitation of the third laser; The second light combining element is also arranged on the optical path where the third laser and the second designated fluorescence are located, and is used to guide the third laser to the fluorescence generating module, and guide the second designated fluorescence to the first light combining element; The first light combining element is further used for combining the first designated fluorescence, the second designated fluorescence and the second laser to generate the output light.

4. The light source device according to claim 3, characterized in that: The light source device further includes a light homogenizer, which is disposed on the optical path of the first laser and the third laser and is used to homogenize the first laser and the third laser before they are incident on the fluorescence generating module; A first light spot formed by the first laser on the light homogenizer and a second light spot formed by the third laser on the light homogenizer do not overlap.

5. The light source device according to claim 4, characterized in that: The first light spot and the second light spot are symmetrical about the same axis.

6. The light source device according to claim 2, characterized in that: The fluorescence generating module comprises a fluorescence wheel and a driving member, wherein the driving member is in transmission connection with the fluorescence wheel and the driving member is used to drive the fluorescence wheel to rotate; the fluorescence wheel comprises a fluorescence generating part and a first scattering part which are adjacently arranged; When the fluorescence generating unit rotates to the optical path where the first laser is located, the fluorescence generating unit is used to generate the first designated fluorescence under the excitation of the first laser, and reflect the first designated fluorescence to the second light combining member; When the first scattering portion rotates to the optical path where the first laser is located, the first scattering portion is used to scatter the first laser and transmit it to the second light combining component; the second light combining component is also used to guide the first laser to the first light combining component.

7. The light source device according to claim 6, characterized in that: The first laser module further includes a fourth laser unit, wherein the first laser unit, the second laser unit and the fourth laser unit are integrated in the same laser generator; the fourth laser unit is used to generate a fourth laser, the wavelength of the fourth laser is greater than the wavelength of the second laser, and the optical etendue of the second laser is less than the optical etendue of the fourth laser; The light source device also includes a first filter, which is arranged on the optical path of the first laser, the second laser and the fourth laser, and is used to transmit the first laser to the fluorescence generating module, reflect the second laser to the first light combining component, and transmit the fourth laser to the second light combining component.

8. The light source device according to claim 7, characterized in that: The light source device further includes a third reflector and a third light combining element; The third reflector is arranged on the optical path of the fourth laser after being transmitted through the first filter element, and is used to reflect the fourth laser to the third light combining element; The third light combining element is disposed on the optical path of the fourth laser and the first laser after being transmitted through the first scattering portion, and is used to transmit the fourth laser to the second light combining element, and reflect the first laser to the second light combining element; The second light combining component is further used to guide the fourth laser to the first light combining component.

9. The light source device according to claim 8, characterized in that: The fluorescent wheel further includes a second scattering portion, which is disposed adjacent to the fluorescent generating portion and the first scattering portion respectively; The second scattering portion is disposed on an optical path where the fourth laser light transmitted through the third light combining component and the first laser light reflected through the third light combining component are located.

10. The light source device according to claim 9, characterized in that: There are a plurality of the fluorescence generating parts and the first scattering parts, and the plurality of the fluorescence generating parts and the plurality of the first scattering parts are disposed around the rotation center of the fluorescence wheel and are alternately arranged in sequence; The second scattering portion is disposed around the outer periphery of the plurality of fluorescent generating portions and the plurality of first scattering portions.

11. The light source device according to claim 8, characterized in that: The light source device further comprises a first scattering member and a second scattering member; The first scattering element is arranged between the first filter element and the third reflector element, and is located on the optical path where the fourth laser is located; the second scattering element is arranged between the first filter element and the first light combining element, and is located on the optical path where the second laser is located.

12. The light source device according to claim 1, characterized in that: The first laser module further includes a fourth laser unit, wherein the first laser unit, the second laser unit and the fourth laser unit are integrated in the same laser generator; the fourth laser unit is used to generate a fourth laser, and the wavelength of the fourth laser is greater than the wavelength of the second laser; The light source device also includes a second filter, which is arranged on the optical path of the first laser, the second laser and the fourth laser, and is used to transmit the first laser to the fluorescence generating module and reflect the second laser and the fourth laser to the first light combining component.

13. The light source device according to claim 1, characterized in that: The light source device further comprises a first converging lens group and a second converging lens group; The first converging lens group is arranged between the first laser module and the first light combining element, and is located on the optical path where the second laser is located; The second converging lens group is arranged between the fluorescence generating module and the first light combining component, and is located on the optical path where the first designated fluorescence is located; the equivalent focal length of the first converging lens group is smaller than the equivalent focal length of the second converging lens group.

14. An optical imaging system, characterized in that: include: The light source device according to any one of claims 1 to 13, wherein the light source device is used to generate output light; as well as The optical modulator is arranged on the optical path where the outgoing light is located.

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