Light source device and optical system

Abstract

Disclosed in the present application are a light source device and an optical system. The light source device comprises a first laser light source for generating a first laser and a second laser, a beam combiner, a phosphor module, and an optical guide module. The beam combiner is configured to guide the first laser and the second laser to the phosphor module. The phosphor module comprises a collection lens assembly and a color wheel which are sequentially arranged in an optical path of the first laser and the second laser. The color wheel comprises a first phosphor ring and a second phosphor ring which are concentrically arranged, wherein first fluorescence generated by the first phosphor ring and second fluorescence generated by the second phosphor ring are sequentially reflected by the color wheel and then transmitted through the collection lens assembly before being incident on the beam combiner. The optical guide module is arranged between the first laser light source and the beam combiner, and is configured to adjust an optical axis of laser incident on the optical guide module. Since the color wheel uses a multi-ring structure with different colors, synchronization is not required when the color wheel starts rotating, thereby increasing the startup speed of the light source device.

Description

Light source device and optical system TECHNICAL FIELD

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

[0002] In the existing laser projection scheme, a light combination scheme of laser excitation color wheel to generate fluorescence (for example, red fluorescence, green fluorescence) is usually adopted. In this scheme, blue laser is usually adopted as excitation light, and the color wheel usually adopts a RGB three-segment type color wheel for time sequence light combination. Therefore, in the process of rotation, the color wheel will generate red fluorescence, green fluorescence and blue light in turn. In the subsequent process, the light modulator will modulate the red fluorescence, green fluorescence and blue light in turn to generate a projection image.

[0003] However, when the color wheel starts to rotate, the color wheel needs to be synchronized so that the light emission timing of the color wheel and the modulation timing of the light modulator are consistent, which will cause the problem of slow start of the light source device due to the long synchronization time of the color wheel. SUMMARY

[0004] The present application provides a light source device and an optical system.

[0005] According to a first aspect of the present application, the present application provides a light source device, which can include a first laser light source, a light combination member, a fluorescence module and a light guiding module. The first laser light source is used to generate first laser light and second laser light. The light combination member is arranged on the light path of the first laser light and the second laser light, and is used to guide the first laser light and the second laser light to the fluorescence module. The fluorescence module includes a collecting lens assembly and a color wheel, which are arranged in sequence on the light path of the first laser light and the second laser light. The color wheel includes a first fluorescence ring and a second fluorescence ring arranged concentrically. The first fluorescence ring is used to generate first fluorescence, and the second fluorescence ring is used to generate second fluorescence. The first fluorescence and the second fluorescence are incident on the light combination member in sequence after being reflected by the color wheel and transmitted by the collecting lens assembly. The colors of the first fluorescence and the second fluorescence are different. The light guiding module is arranged between the first laser light source and the light combination member, and is located on the light path of at least one of the first laser light and the second laser light. The light guiding module is used to adjust the optical axis of the laser light incident on the light guiding module, so that the first laser light is incident on the area where the first fluorescence ring is located, and the second laser light is incident on the area where the second fluorescence ring is located.

[0006] According to a second aspect of the present application, the present application further provides an optical system, which includes the above-mentioned light source device and a light modulator. The light source device is used to generate specified light, and the light modulator is arranged on the light path of the specified light.

[0007] The embodiment of the present application provides a light source device and an optical system, wherein the fluorescence module in the light source device comprises a collecting lens assembly and a color wheel, the color wheel comprises a first fluorescence ring and a second fluorescence ring which are concentrically arranged, wherein the first fluorescence ring is used for generating first fluorescence under excitation of first laser, and the second fluorescence ring is used for generating second fluorescence under excitation of second laser. For example, the first laser and the second laser can be blue lasers respectively, the first fluorescence ring can be a red fluorescence powder ring, and the second fluorescence ring can be a green fluorescence powder ring.

[0008] Therefore, the color wheel in the embodiment of the present application adopts a multi-ring structure of different colors, for example, the first fluorescence ring can be used as an inner ring of the color wheel, and the second fluorescence ring can be used as an outer ring of the color wheel, so that the color wheel does not need to be synchronized when starting to rotate, thereby solving the problem of long synchronization time of the color wheel in the case of adopting the RGB three-section structure, and improving the starting speed of the light source device. In addition, the color wheel in the present application can also effectively solve the problem of picture flicker caused by color wheel stall, and ensure that the optical system provided with the light source device can work smoothly.

[0009] In addition, the collecting lens assembly is arranged between the color wheel and the light combining piece, and is used for converging the first fluorescence and the second fluorescence reflected by the color wheel, so as to improve the utilization efficiency of fluorescence energy. At the same time, the collecting lens assembly is also located on the light path of the first laser and the second laser, and plays a converging role on the first laser and the second laser.

[0010] In order to avoid that the first laser and the second laser converge to the same area (for example, the area where the first fluorescence ring is located) of the color wheel under the action of the collecting lens assembly, the light guiding module is further arranged between the first laser source and the light combining piece in the embodiment of the present application, and is used for adjusting the optical axis of at least one of the first laser and the second laser, so that the first laser can accurately enter the area where the first fluorescence ring is located, and the second laser can accurately enter the area where the second fluorescence ring is located, so as to ensure that the first fluorescence and the second fluorescence can be excited smoothly, and the normal work of the light source device is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0012] FIG. 1 is a structural schematic diagram of an optical system provided by the embodiment of the present application.

[0013] FIG. 2 is a structural schematic diagram of a light source device in the optical system shown in FIG. 1.

[0014] Fig. 3 is a schematic diagram of the structure of the color wheel in the light source device shown in Fig. 2.

[0015] Fig. 4 is another schematic diagram of the structure of the light source device in the optical system shown in Fig. 1.

[0016] Fig. 5 is a schematic diagram of the structure of the color wheel in the light source device shown in Fig. 4.

[0017] Fig. 6 is a schematic diagram of the laser light path between the prism and the color wheel in the light source device shown in Fig. 4.

[0018] Fig. 7 is a schematic diagram of the structure of the light guiding assembly in the light source device shown in Fig. 4.

[0019] Fig. 8 is a schematic diagram of one structure of the light guiding assembly in the light source device shown in Fig. 4.

[0020] Fig. 9 is another schematic diagram of the structure of the light guiding assembly in the light source device shown in Fig. 4.

[0021] Fig. 10 is still another schematic diagram of the structure of the light source device in the optical system shown in Fig. 1.

[0022] Fig. 11 is a schematic diagram of one laser light path between the prism and the color wheel in the light source device shown in Fig. 10.

[0023] Fig. 12 is another schematic diagram of the laser light path between the prism and the color wheel in the light source device shown in Fig. 10.

[0024] Fig. 13 is still another schematic diagram of the structure of the light source device in the optical system shown in Fig. 1.

[0025] Fig. 14 is a schematic diagram of the structure of the prism and the light compensation member in the light source device shown in Fig. 13.

[0026] Fig. 15 is still another schematic diagram of the structure of the light source device in the optical system shown in Fig. 1.

[0027] Fig. 16 is a schematic diagram of the structure of the prism and the light compensation member in the light source device shown in Fig. 15. DETAILED DESCRIPTION

[0028] In order to make the persons skilled in the art better understand the scheme of the present application, the technical scheme 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 some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the persons skilled in the art without making any creative effort shall fall within the scope of protection of the present application.

[0029] Referring to FIG. 1, an optical system 100 is provided in the embodiments of the present application, which can realize multiple optical functions, such as illumination function, projection function, and the like. Specifically, the optical system 100 can be applied to a vehicle lamp, and when the vehicle is in driving condition, the optical system 100 can realize the illumination function; when the vehicle is in parking condition, the optical system 100 can realize the projection function, so as to enrich the use scenarios of the vehicle lamp. Of course, the optical system 100 can also be applied to other devices with illumination function and projection function, and the embodiments are not limited in this aspect.

[0030] In the embodiments, the optical system 100 can include a light source device 200 and a light modulator 120. The light source device 200 is configured to generate specified light LD. The specified light LD can be mixed light of laser and fluorescence. For example, the specified light LD can be mixed light of blue laser, red fluorescence and green fluorescence. The specified light LD can also be light emitted by laser or fluorescence in time division. For example, the blue laser, the red fluorescence and the green fluorescence can be sequentially emitted from the light source device 200 in turn. The specific implementation of the light source device 200 is described in the following embodiments.

[0031] The light modulator 120 is arranged on the light path of the specified light LD, and is configured to guide the specified light LD. Specifically, when the optical system 100 needs to realize the illumination function, the light modulator 120 is configured to directly reflect the specified light LD to the area to be illuminated (for example, the front and rear areas of the vehicle); when the optical system 100 needs to realize the projection function, the light modulator 120 is configured to modulate the specified light LD to generate light carrying image information, and reflect the light carrying image information to the area to be projected (for example, projection screen, wall, and the like).

[0032] Specifically, the light modulator 120 can be a digital micromirror device (DMD). The DMD is composed of a digital micromirror array. Each digital micromirror constitutes a modulation unit, and the modulation unit is configured to modulate the image corresponding to one pixel. Each digital micromirror is flipped under the driving of the driving signal generated by the control device. The number of flips of each digital micromirror is determined by the driving signal. The flipped digital micromirror array modulates the specified light LD to form light carrying image information. In other possible embodiments, the light modulator 120 can also be an HTPS-LCD display chip, a liquid crystal on silicon (LCoS), and the like. The specific implementation of the light modulator 120 is not limited in the embodiments.

[0033] It is to be noted that when the light source device 200 is applied in the optical system 100 configured with the light modulator 120, if the optical system 100 is in the "illumination mode", the light modulator 120 is used to reflect the specified light ray LD generated by the light source device 200, and the specified light ray LD will not be modulated in the process of reflection. If the optical system 100 is in the "projection mode", the light modulator 120 is used to modulate the specified light ray LD generated by the light source device 200 to generate light rays carrying image information. That is, in the illumination mode, the optical system 100 is used to generate light rays of a single color (for example, white light); in the projection mode, the optical system 100 is used to generate light rays carrying image information.

[0034] Referring to FIGS. 2 and 3, the light source device 200 can include a first laser light source 10, a light combining member 30, a fluorescent module 50, and a light guiding module 70, the first laser light source 10 being used to generate first laser light L1 and second laser light L2. The light combining member 30 is disposed on the light path of the first laser light L1 and the second laser light L2, and is used to guide the first laser light L1 and the second laser light L2 to the fluorescent module 50. Here, "guiding" can be transmitting the first laser light L1 and the second laser light L2, or reflecting the first laser light L1 and the second laser light L2. Exemplarily, the first laser light L1 and the second laser light L2 can be blue laser light respectively.

[0035] The fluorescent module 50 can include a collecting lens assembly 520 and a color wheel 540, the collecting lens assembly 520 and the color wheel 540 being disposed in sequence on the light path of the first laser light L1 and the second laser light L2. The color wheel 540 can include a first fluorescent ring 5410 and a second fluorescent ring 5430 disposed concentrically, the first fluorescent ring 5410 being used to generate first fluorescent light F1, and the second fluorescent ring 5430 being used to generate second fluorescent light F2, the first fluorescent light F1 and the second fluorescent light F2 being sequentially reflected by the color wheel 540 and transmitted by the collecting lens assembly 520 to enter the light combining member 30, the colors of the first fluorescent light F1 and the second fluorescent light F2 being different. Exemplarily, the first fluorescent ring 5410 can be a red fluorescent powder ring, and the second fluorescent ring 5430 can be a green fluorescent powder ring, that is, the first fluorescent light F1 is red fluorescent light, and the second fluorescent light F2 is green fluorescent light.

[0036] Therefore, the color wheel 540 in the embodiment adopts a multi-ring structure of different colors, for example, the first fluorescent ring 5410 can be used as the inner ring of the color wheel 540, and the second fluorescent ring 5430 can be used as the outer ring of the color wheel 540, so that the color wheel 540 does not need to be synchronized when it starts to rotate, solving the problem of long synchronization time of the color wheel 540 in the case of adopting the RGB three-segment structure, so as to improve the starting speed of the light source device 200. In addition, the color wheel 540 in the embodiment can also effectively solve the problem of picture flicker caused by color wheel stall, and ensure that the optical system 100 configured with the light source device 200 can work smoothly.

[0037] In addition, since the collecting lens assembly 520 is arranged between the color wheel 540 and the light combining member 30, the collecting lens assembly 520 is used to converge the first fluorescent light F1 and the second fluorescent light F2 reflected by the color wheel 540, so as to improve the utilization efficiency of fluorescent light energy. At the same time, the collecting lens assembly 520 is also located on the light path of the first laser L1 and the second laser L2, and plays a converging role for the first laser L1 and the second laser L2.

[0038] In order to avoid the first laser L1 and the second laser L2 converging to the same area of the color wheel 520 (for example, the area where the first fluorescent ring 5410 is located) under the action of the collecting lens assembly 520, the light guiding module 70 is arranged between the first laser light source 10 and the light combining member 30 in the embodiment of the application. The light guiding module 70 is located on the light path of at least one of the first laser L1 and the second laser L2, and the light guiding module 70 is used to adjust the optical axis of the laser incident to the light guiding module 70, so that the first laser L1 can be accurately incident to the area where the first fluorescent ring 5410 is located, and the second laser L2 can be accurately incident to the area where the second fluorescent ring 5430 is located, so as to ensure that the first fluorescent light F1 and the second fluorescent light F2 can be excited smoothly, and ensure the normal work of the light source device 200.

[0039] The specific implementation of the light source device 200 will be described below.

[0040] In the embodiment, the first laser light source 10 can include a first laser generator 140 and a second laser generator 160 arranged at intervals. The first laser generator 140 is used to generate the first laser L1, and the second laser generator 160 is used to generate the second laser L2. Specifically, the first laser L1 and the second laser L2 can be two paths of blue lasers with the same wavelength, or two paths of blue lasers with different wavelengths, which are not limited in the embodiment.

[0041] Please refer to FIG. 4 and FIG. 5, the light source device 200 can further include a second laser light source 20, the second laser light source 20 and the first laser light source 10 are located at the same side of the light combining member 30. Wherein, the second laser light source 20 can include a third laser generator 210, the third laser generator 210 is used to generate a third laser L3. Specifically, the first laser L1, the second laser L2 and the third laser L3 can be three blue lasers with the same wavelength, or can be three blue lasers with different wavelengths, and the embodiment is not limited to this.

[0042] Specifically, the first laser generator 140, the second laser generator 160 and the third laser generator 210 can be sequentially and spacedly arranged, and the light outlets of the three laser generators can be arranged towards the same direction, so that the first laser L1, the second laser L2 and the third laser L3 can be substantially parallelly emitted along the same direction. In an ideal case, the first laser L1, the second laser L2 and the third laser L3 can be regarded as three lasers parallel to each other. In addition, the three laser generators are arranged at the same side of the light combining member 30, so as to facilitate centralized heat dissipation of the three laser generators, and improve the heat dissipation efficiency of the light source device 200.

[0043] It should be noted here that the embodiment does not limit the specific arrangement order of the first laser generator 140, the second laser generator 160 and the third laser generator 210. In some other possible embodiments, the third laser generator 210 can be arranged between the first laser generator 140 and the second laser generator 160.

[0044] In the embodiment, the light combining member 30 is also arranged on the light path of the third laser L3, and is used to guide the third laser L3 to the color wheel 540. In the embodiment shown in FIG. 4, the light combining member 30 is used to reflect the first laser L1, the second laser L2 and the third laser L3 generated by the first laser light source 10 and the second laser light source 20 to the color wheel 540. Specifically, the light combining member 30 can be a dichroic sheet, for example, a film sheet that reflects blue light and transmits yellow light, a film sheet that reflects blue light and transmits red and green light, and the like. Here, “reflects A light and transmits B light” can be understood as reflecting A light and transmitting B light.

[0045] In some other possible embodiments, the light combining member 30 is used to transmit the first laser L1, the second laser L2 and the third laser L3 generated by the first laser light source 10 and the second laser light source 20 to the color wheel 540. For example, the light combining member 30 can be a film sheet that reflects yellow light and transmits blue light, a film sheet that reflects red and green light and transmits blue light, and the like.

[0046] In the embodiment, the fluorescence module 50 can include a collecting lens assembly 520 and a color wheel 540, which are sequentially arranged on the light path of the first laser L1, the second laser L2 and the third laser L3 emitted via the light combining member 30. The first laser L1, the second laser L2 and the third laser L3 are transmitted via the collecting lens assembly 520 and then incident on the color wheel 540.

[0047] In the embodiment shown in FIG. 5, the color wheel 540 can include a first fluorescence ring 5410, a second fluorescence ring 5430 and a transmission ring 5450, which are concentrically arranged. Specifically, the transmission ring 5450, the first fluorescence ring 5410 and the second fluorescence ring 5430 are annular and arranged around the rotation center O of the color wheel 540. Therefore, the color wheel 540 in the embodiment adopts a multi-ring structure of different colors to solve the problem of long synchronization time of the RGB three-segment color wheel.

[0048] Specifically, the first fluorescence ring 5410 can be a red fluorescence ring, for example, the first fluorescence ring 5410 can be an annular red fluorescence ceramic plate, or a colloid doped with red fluorescence particles can be coated in the region where the first fluorescence ring 5410 is located, so that the first fluorescence ring 5410 generates the first fluorescence F1 under the excitation of excitation light (for example, blue laser). The second fluorescence ring 5430 can be a green fluorescence ring, for example, the second fluorescence ring 5430 can be an annular green fluorescence ceramic plate, or a colloid doped with green fluorescence particles can be coated in the region where the second fluorescence ring 5430 is located, so that the second fluorescence ring 5430 generates the second fluorescence F2 under the excitation of excitation light (for example, blue laser). The transmission ring 5450 is used for transmitting laser, for example, a full-transmission film can be attached in the region where the transmission ring 5450 is located to improve the transmission efficiency of laser.

[0049] In the embodiment shown in FIG. 5, the transmission ring 5450 serves as the outer ring of the color wheel 540, the first fluorescence ring 5410 serves as the inner ring of the color wheel 540, and the second fluorescence ring 5430 is located between the first fluorescence ring 5410 and the transmission ring 5450. In some other possible embodiments, the transmission ring 5450 can serve as the inner ring of the color wheel 540, or the transmission ring 5450 is located between the first fluorescence ring 5410 and the second fluorescence ring 5430. The arrangement position of the first fluorescence ring 5410, the second fluorescence ring 5430 and the transmission ring 5450 on the color wheel 540 is not limited in the embodiment.

[0050] In the embodiment, the first fluorescent ring 5410 and the second fluorescent ring 5430 can be provided with a reflecting member (not shown in the figure) on the side facing away from the light combining member 30. For example, the reflecting member can be a total reflection film, so that the color wheel 540 can reflect the first fluorescent light F1 and the second fluorescent light F2 towards the side of the light combining member 30. Therefore, the color wheel 540 in the embodiment is a reflective color wheel.

[0051] The collecting lens assembly 520 is further arranged on the light path of the first fluorescent light F1 and the second fluorescent light F2, and is used to converge and collect the first fluorescent light F1 and the second fluorescent light F2, so as to improve the utilization efficiency of the fluorescent light energy. Specifically, the collecting lens assembly 520 can include a plurality of collecting lenses to ensure the collection efficiency of the first fluorescent light F1 and the second fluorescent light F2. In the embodiment shown in FIG. 4, the collecting lens assembly 520 can include a first collecting lens 5210 and a second collecting lens 5230, which are arranged in sequence on the light path of the first fluorescent light F1 and the second fluorescent light F2. Specifically, the first collecting lens 5210 and the second collecting lens 5230 can be positive lenses respectively.

[0052] In the embodiment shown in FIG. 4, the fluorescent module 50 can further include a guiding assembly 80 arranged on the light path of the laser light transmitted via the transmission ring 5450, and used to guide the laser light transmitted via the transmission ring 5450 to the light combining member 30.

[0053] Specifically, the guiding assembly 80 can include a first reflecting mirror 810, a second reflecting mirror 830 and a third reflecting mirror 850, which are arranged in sequence on the light path of the laser light transmitted via the transmission ring 5450, and used to reflect the laser light to the light combining member 30.

[0054] In some possible embodiments, the guiding assembly 80 can further include a first relay lens 870 and a second relay lens 890, wherein the first relay lens 870 is arranged between the color wheel 540 and the first reflecting mirror 810 and located on the light path of the laser light transmitted via the transmission ring 5450. The second relay lens 890 is arranged between the first reflecting mirror 810 and the second reflecting mirror 830 and located on the light path of the laser light transmitted via the transmission ring 5450. The first relay lens 870 and the second relay lens 890 are used to converge the laser light to reduce the energy loss of the laser light during propagation. Specifically, the first relay lens 870 and the second relay lens 890 can be positive lenses respectively.

[0055] In the embodiment, the light combining member 30 is also used to combine the laser light, the first fluorescent light F1 and the second fluorescent light F2 transmitted via the transmission ring 5450 to generate the specified light LD. Specifically, the light combining member 30 in FIG. 4 is used to reflect the laser light transmitted via the transmission ring 5450 and transmit the first fluorescent light F1 and the second fluorescent light F2 to generate the specified light LD. In some other possible embodiments, the light combining member 30 is used to transmit the laser light transmitted via the transmission ring 5450 and reflect the first fluorescent light F1 and the second fluorescent light F2 to generate the specified light LD.

[0056] In some possible embodiments, the light source device 200 can further include a light homogenizing member 32 disposed on the light path where the specified light LD is located, which is used to homogenize the specified light LD so that the spot energy distribution of the specified light LD is more uniform. Specifically, the light homogenizing member 32 can be a compound eye lens or a light homogenizing rod (for example, a square rod), which is not limited in the embodiment.

[0057] In the embodiment shown in FIG. 4, the presence of the collection lens assembly 520 will play a role in converging the first laser light L1, the second laser light L2 and the third laser light L3. To avoid the first laser light L1, the second laser light L2 and the third laser light L3 converging to the same area of the color wheel 540 (for example, the area where the first fluorescent ring 5410 is located) under the action of the collection lens assembly 520, the embodiment further provides a light guiding module 70 between the first laser light source 10 and the light combining member 30, which is located on the light path where at least two of the first laser light L1, the second laser light L2 and the third laser light L3 are located, and is used to adjust the optical axis of at least two of the first laser light L1, the second laser light L2 and the third laser light L3, so that the first laser light L1 can accurately enter the area where the first fluorescent ring 5410 is located, the second laser light L3 can accurately enter the area where the second fluorescent ring 5430 is located, and the third laser light L3 enters the area where the transmission ring 5450 is located. In turn, it ensures that the first fluorescent light F1 and the second fluorescent light F2 can be smoothly excited, and ensures the normal operation of the light source device 100.

[0058] It should be noted here that if the light guiding module 70 is not provided, the second laser light L2 can enter the area where the second fluorescent ring 5430 is located. In this case, the light guiding module 70 can be provided only on the light path where the first laser light L1 and the third laser light L3 are located, and the optical axes of the first laser light L1 and the third laser light L3 are adjusted, so that the adjusted first laser light L1 can enter the area where the first fluorescent ring 5410 is located, and the adjusted third laser light L3 can enter the area where the transmission ring 5450 is located. Of course, the light guiding module 70 can be provided on the light path where the first laser light L1, the second laser light L2 and the third laser light L3 are located.

[0059] The specific implementation of the light guiding module 70 is described below.

[0060] In the embodiment shown in FIG. 4, the light guiding module 70 can include a light guiding assembly 720 located on the optical path of the first laser L1, the second laser L2 and the third laser L3. The light guiding assembly 720 can be provided with a first guiding surface 7210, a second guiding surface 7230 and a third guiding surface 7250. The first laser L1 exits the light combining member 30 via the first guiding surface 7210, the second laser L2 exits the light combining member 30 via the second guiding surface 7230, and the third laser L3 exits the light combining member 30 via the third guiding surface 7250. Specifically, the first guiding surface 7210, the second guiding surface 7230 and the third guiding surface 7250 are not coplanar. The "guiding surface" herein can refract or reflect the incident laser to adjust the optical axis of the laser.

[0061] In some possible embodiments, the light guiding assembly 720 can include a prism 7201, and the first guiding surface 7210, the second guiding surface 7230 and the third guiding surface 7250 are light exit surfaces of the prism 7201. The second guiding surface 7230 is perpendicular to the optical axis direction of the second laser L2 incident to the prism 7201, so that the optical axis direction of the second laser L2 remains unchanged when the second laser L2 exits the prism 7201.

[0062] The first guiding surface 7210 and the second guiding surface 7230 are adjacent, and the angle between the plane where the first guiding surface 7210 is located and the optical axis of the first laser L1 incident to the prism 7201 is an acute angle. Therefore, when the first laser L1 exits the prism 7201, the optical axis direction of the first laser L1 is deflected, so that the first laser L1 can subsequently accurately enter the region where the first fluorescent ring 5410 is located.

[0063] The third guiding surface 7250 and the second guiding surface 7230 are adjacent, and the angle between the plane where the third guiding surface 7250 is located and the optical axis of the third laser L3 incident to the prism 7201 is an acute angle. Therefore, when the third laser L3 exits the prism 7201, the optical axis direction of the third laser L3 is deflected, so that the third laser L3 can subsequently accurately enter the region where the transmission ring 5450 is located.

[0064] Specifically, the first guide surface 7210 and the third guide surface 7250 are located on opposite sides of the second guide surface 7230, respectively, and the first guide surface 7210 and the third guide surface 7250 can be axially symmetrical about the central axis of the prism 7201. That is, the first guide surface 7210 and the third guide surface 7250 in the present embodiment are two side surfaces of the prism 7201, and for the convenience of description, the prism side surface located on the light path of the first laser L1 is referred to as the "first guide surface", and the prism side surface located on the light path of the third laser L3 is referred to as the "third guide surface". Since the prism 7201 in the present embodiment has an axial symmetrical structure, the assembly convenience of the prism 7201 can be improved.

[0065] Please refer to FIGS. 4 to 6, wherein FIG. 6 is a schematic diagram of the laser light path between the prism 7201 and the color wheel 540. Since the guide 30 plays a folding role for the laser, the guide 30 is not shown in FIG. 6. The first fluorescent ring 5410 and the second fluorescent ring 5430 are adjacent to each other, the first laser L1 is incident to the first fluorescent ring 5410 to form a first light spot M1, and the second laser L2 is incident to the second fluorescent ring 5430 to form a second light spot M2. Among them, the first light spot M1 and the second light spot M2 can be approximately rectangular light spots, respectively, the sizes of the first light spot M1 and the second light spot M2 can be approximately equal, and the first light spot M1 and the second light spot M2 are spaced apart in the radial direction of the color wheel 540.

[0066] Specifically, the included angle between the extension plane of the first guide surface 7210 and the second guide surface 7230 is α, α is an acute angle, and the distance between the center of the first light spot M1 and the center of the second light spot M2 is d. Of course, α here can also be the included angle between the extension plane of the third guide surface 7250 and the second guide surface 7230. d here can also be the distance between the center of the third light spot M3 and the center of the second light spot M2, and the third light spot M3 is the light spot formed by the third laser L3 being incident to the transmission portion 5450. Among them, d satisfies the following formula.

[0067] Among them, n is the refractive index of the prism 7201, n1 and n2 are the refractive indices of the first collection lens 5210 and the second collection lens 5230, respectively, R 11 and R 21 are the first face radii of curvature of the first collection lens 5210 and the second collection lens 5230, respectively, 12 and R 22 are the second face radii of curvature of the first collection lens 5210 and the second collection lens 5230, respectively, d1 and d2 are the thicknesses of the first collection lens 5210 and the second collection lens 5230, respectively, and D is the distance between the first collection lens 5210 and the second collection lens 5230.

[0068] Further, the equivalent focal length of the collection lens assembly 520 is f, which satisfies the following formula.

[0069] wherein, Therefore, in combination with the above two formulas, the formula corresponding to d can be simplified as follows. d = f*tan[arcsin(n*sin a)-a].

[0070] Since the first laser L1, the second laser L2 and the third laser L3 need to be incident to the areas where the first fluorescent ring 5410, the second fluorescent ring 5430 and the transmission ring 5450 are located one by one, in order to avoid the phenomenon of cross color caused by the cross-layer illumination of the spot, for example, part of the first spot M1 falls on the area where the second fluorescent ring 5430 is located, the distance d between the center of the first spot M1 and the center of the second spot M2 needs to satisfy the following formula.

[0071] wherein, m is the size of the mixed fluorescent light incident to the light mixing piece 30 in the radial direction of the color wheel 540, and the mixed fluorescent light is the mixed light of the first fluorescent light F1 and the second fluorescent light F2. Specifically, when designing the optical path of the light source device 200, the size of the mixed fluorescent light can be determined according to the size of the first collection lens 5210 and the second collection lens 5230. That is, the above-mentioned m is a known quantity.

[0072] It should be noted here that since the first fluorescent light F1 and the second fluorescent light F2 reflected from the color wheel 540 are mostly overlapped, it means that the spot size of the mixed fluorescent light can be approximately equal to three times the size of a single laser spot. Therefore, under the condition that m, f and n are known, the range of the wedge angle a can be determined by the above formula to ensure that the first laser L1, the second laser L2 and the third laser L3 adjusted by the prism 7201 can be incident to the areas where the first fluorescent ring 5410, the second fluorescent ring 5430 and the transmission ring 5450 are located one by one, avoiding the occurrence of cross color.

[0073] Please refer to Fig. 4 again, the light guiding module 70 can further include a first double compound eye lens 740, which is arranged between the first laser light source 10 and the prism 7201 and located on the optical path of the first laser L1, the second laser L2 and the third laser L3. The first double compound eye lens 740 is used for homogenizing the first laser L1, the second laser L2 and the third laser L3, so as to improve the uniformity of the corresponding spot energy of the first laser L1, the second laser L2 and the third laser L3.

[0074] Referring to FIG. 7, the prism 7201 is further provided with an incident surface 7270 which is perpendicular to the optical axis direction of the first laser L1, the second laser L2 and the third laser L3 incident to the prism 7201, and the incident surface 7270 and the exit surface (i.e., the first guide surface 7210, the second guide surface 7230 and the third guide surface 7250) are respectively located on opposite sides of the prism 7201.

[0075] The light guide assembly 720 can further include a plurality of microlens arrays 7203 respectively arranged on the incident surface 7270 and the exit surface of the prism 7201. Specifically, the plurality of microlens arrays 7203 and the prism 7201 can be an integrally formed structure. Therefore, the light guide assembly 720 can not only adjust the optical axis of the laser, but also homogenize the laser through the plurality of microlens arrays 7203.

[0076] It can be found that the compound eye lens and the prism are integrated in the same optical device in the embodiment, so that the overall structure of the light guide module 70 is more compact, thereby reducing the overall installation space of the light source device 200. In addition, the integration of the compound eye lens and the prism also reduces the difficulty of installation and optical path debugging of the light guide module 70.

[0077] Referring to FIG. 8, the light guide assembly 720 can include a first reflecting member 7205, a second reflecting member 7207 and a third reflecting member 7209, the first guide surface 7210 is a reflecting surface of the first reflecting member 7205, the second guide surface 7230 is a reflecting surface of the second reflecting member 7207, and the third guide surface 7250 is a reflecting surface of the third reflecting member 7209. Specifically, the first reflecting member 7205, the second reflecting member 7207 and the third reflecting member 7209 can be respectively reflecting mirrors, and the three reflecting mirrors correspond to different inclination angles, so that the first guide surface 7210, the second guide surface 7230 and the third guide surface 7250 are not coplanar and not parallel to each other. Therefore, the embodiment can make the adjustment process of the optical axis more simple and flexible by independently adjusting the optical axis of the three lasers through the three reflecting members.

[0078] In the embodiment shown in FIG. 8, the light guide module 70 can further include a first single compound eye lens 760 arranged between the light guide assembly 720 and the light combining member 30 and located on the optical path of the first laser L1, the second laser L2 and the third laser L3, and one side of the microlens array of the first single compound eye lens 760 is arranged towards the light combining member 30. The first single compound eye lens 760 is used for homogenizing the first laser L1, the second laser L2 and the third laser L3, so as to improve the uniformity of the corresponding light spot energy of the first laser L1, the second laser L2 and the third laser L3.

[0079] Referring to FIG. 9, the first laser L1, the second laser L2 and the third laser L3 are incident to the light guiding module 70 in the same direction, and the first laser L1 and the third laser L3 are respectively located on opposite sides of the second laser L2. Specifically, the first laser L1, the second laser L2 and the third laser L3 can be sequentially and spaced apart in a specified direction M, and the specified direction M can be perpendicular to the optical axis direction of the first laser L1 incident to the light guiding module 70. Therefore, the first laser L1, the second laser L2 and the third laser L3 can be regarded as three lasers parallel to each other.

[0080] The light guiding module 70 can include a second single compound eye lens 770 and a third single compound eye lens 780, and the second single compound eye lens 770 and the third single compound eye lens 780 are spaced apart in the specified direction M to form a gap K. The second single compound eye lens 770 is arranged on the optical path of the first laser L1 and is used to adjust the optical axis of the first laser L1, and one side of the second single compound eye lens 770 provided with a microlens array is arranged towards the light combining member 30. Specifically, the light exit surface and the light entrance surface of the second single compound eye lens 770 are not parallel, so as to adjust the optical axis of the first laser L1.

[0081] The third single compound eye lens 780 is arranged on the optical path of the third laser L3 and is used to adjust the optical axis of the third laser L3, and one side of the third single compound eye lens 780 provided with a microlens array is arranged towards the light combining member 30. Specifically, the light exit surface and the light entrance surface of the third single compound eye lens 780 are not parallel, so as to adjust the optical axis of the third laser L3. The second laser L2 is incident to the light combining member 30 after passing through the gap K. Since the angle of the second laser L2 is small, no light homogenizing device needs to be arranged on the optical path of the second laser L2, which can reduce the hardware cost of the light guiding module 70.

[0082] Therefore, the second single compound eye lens 770 and the third single compound eye lens 780 of the embodiment can not only adjust the optical axis of the laser, but also homogenize the laser, so that the overall structure of the light guiding module 70 is more compact. In addition, the optical axis of the laser is independently adjusted by the corresponding single compound eye lens, so that the adjustment process of the optical axis is more simple and flexible.

[0083] Referring to FIG. 3 and FIG. 10, the light source device 200 can further include a second laser light source 20, and the second laser light source 20 and the first laser light source 10 are respectively located on opposite sides of the light combining member 30, and the second laser light source 20 is used to generate the third laser L3. As an embodiment, the second laser light source 20 can include a laser generator 230, a scattering member 250 and a compound eye lens 270, and the laser generator is used to generate the third laser L3. Specifically, the first laser L1, the second laser L2 and the third laser L3 can be three blue lasers with the same wavelength, or can be three blue lasers with different wavelengths, and the embodiment does not limit this.

[0084] The scattering member 250 is arranged between the laser generator and the light combining member 30 and is located on the light path of the third laser L3. The scattering member 250 is configured to scatter the third laser L3 to eliminate speckle in the third laser L3, thereby improving the imaging quality of the optical system 100 provided with the light source device 200. Specifically, the scattering member 250 can be a scattering sheet. The compound eye lens 270 is arranged between the scattering member 250 and the light combining member 30 and is located on the light path of the third laser L3. The compound eye lens 270 is configured to homogenize the third laser L3 to improve the uniformity of the corresponding light spot energy of the third laser L3. Of course, the compound eye lens 270 can also be replaced by a homogenizing rod (for example, a square rod) in this embodiment, and the specific implementation is not limited herein.

[0085] The light combining member 30 is also arranged on the light path of the third laser L3 and is configured to combine the third laser L3, the first fluorescent light F1 and the second fluorescent light F2. In the embodiment shown in FIG. 10, the light combining member 30 is configured to reflect the third laser L3 and transmit the first fluorescent light F1 and the second fluorescent light F2 to generate the designated light ray LD. For example, the light combining member 30 can be a film sheet that reflects blue light and transmits yellow light, a film sheet that reflects blue light and transmits red and green light, or the like.

[0086] In other possible embodiments, the light combining member 30 can be configured to transmit the third laser L3 and reflect the first fluorescent light F1 and the second fluorescent light F2 to generate the designated light ray LD. For example, the light combining member 30 can be a film sheet that transmits blue light and reflects yellow light, a film sheet that transmits blue light and reflects red and green light, or the like. The specific implementation of the light combining member 30 is not limited herein.

[0087] In some possible embodiments, the light source device 200 can further include a light homogenizing member 32 arranged on the light path of the designated light ray LD and configured to homogenize the designated light ray LD to make the light spot energy distribution of the designated light ray LD more uniform. Specifically, the light homogenizing member 32 can be a compound eye lens or a light homogenizing rod (for example, a square rod), and the specific implementation is not limited herein.

[0088] It can be found that, since the second laser light source 20 and the first laser light source 10 are respectively located on the opposite sides of the light combining member 30, the third laser L3 does not need to be transmitted by the color wheel 540 before participating in light combination. Compared with the embodiment shown in FIG. 4, the color wheel 540 in this embodiment does not need to be provided with a transmission ring 5450 for transmitting laser. Therefore, in the case that the size of the mixed fluorescent light is fixed, the sizes of the first fluorescent ring 5410 and the second fluorescent ring 5430 in the radial direction of the color wheel 540 can be increased.

[0089] Meanwhile, the area of the first light spot M1 formed by the first laser L1 incident to the first fluorescent ring 5410 can become 1.5 times the area of the first light spot M1 in the embodiment shown in FIG. 4. In the case of the increased light spot area, the power density of the fluorescent powder on the first fluorescent ring 5410 excited by the first laser L1 is reduced, so as to improve the excitation efficiency of the first fluorescent light F1. Similarly, the area of the second light spot M2 formed by the second laser L2 incident to the second fluorescent ring 5430 can become 1.5 times the area of the second light spot M2 in the embodiment shown in FIG. 4. In the case of the increased light spot area, the power density of the fluorescent powder on the second fluorescent ring 5430 excited by the second laser L2 is reduced, so as to improve the excitation efficiency of the second fluorescent light F2.

[0090] In addition, compared with the embodiment shown in FIG. 4, the light source device 200 in the embodiment does not need to be provided with the guiding assembly 80, so as to reduce the hardware cost of the light source device 200, save the installation space of the light source device 200, and realize the miniaturization design of the light source device 200.

[0091] In the embodiment shown in FIG. 10, the specific implementation of the collection lens assembly 520 can refer to the related description in the corresponding embodiment in FIG. 4, which will not be repeated here. The color wheel 540 can include the first fluorescent ring 5410 and the second fluorescent ring 5430 adjacent to each other. The specific implementation of the first fluorescent ring 5410 and the second fluorescent ring 5430 can refer to the related description in the corresponding embodiment in FIG. 4, which will not be repeated here. Specifically, in the case that the first fluorescent ring 5410 and the second fluorescent ring 5430 are adjacent to each other, the first light spot M1 and the second light spot M2 are spaced apart in the radial direction of the color wheel 540, so as to avoid the phenomenon of color mixing caused by the cross-circle layer illumination of the light spot.

[0092] Due to the existence of the collection lens assembly 520, the first laser L1 and the second laser L2 can be converged. In order to avoid the first laser L1 and the second laser L2 converging to the same area of the color wheel 540 (for example, the area where the first fluorescent ring 5410 is located) under the action of the collection lens assembly 520, the light guiding module 70 is arranged between the first laser light source 10 and the light combining member 30. The light guiding module 70 is located on the light path of at least one of the first laser L1 and the second laser L2, and is used to adjust the optical axis of at least one of the first laser L1 and the second laser L2, so that the first laser L1 can accurately incident to the area where the first fluorescent ring 5410 is located, and the second laser L3 can accurately incident to the area where the second fluorescent ring 5430 is located, thereby ensuring that the first fluorescent light F1 and the second fluorescent light F2 can be excited smoothly, and ensuring the normal work of the light source device 100.

[0093] It should be noted that if the light guide module 70 is not provided, the second laser L2 can be incident to the area where the second fluorescent ring 5430 is located. In this case, the light guide module 70 can be provided only on the light path where the first laser L1 is located, and the optical axis of the first laser L1 is adjusted so that the adjusted first laser L1 can be incident to the area where the first fluorescent ring 5410 is located. Of course, the light guide module 70 can be provided on the light paths where the first laser L1 and the second laser L2 are located.

[0094] In the embodiment shown in FIG. 10, the light guide module 70 can include a prism 7201 having a first guide surface 7210 and a second guide surface 7230, the first laser L1 being emitted to the light combiner 30 via the first guide surface 7210, and the second laser L2 being emitted to the light combiner 30 via the second guide surface 7230, the first guide surface 7210 and the second guide surface 7230 being non-coplanar and non-parallel. Specifically, the first guide surface 7210 and the second guide surface 7230 can be the light exit surfaces of the prism 7201. The "guide surface" herein can refract or reflect the incident laser to adjust the optical axis of the laser.

[0095] In some possible embodiments, referring to FIG. 11, which is a schematic diagram of the laser light path between the prism 7201 and the color wheel 540, the guide 30 is not shown in FIG. 11 because the guide 30 plays a folding role for the laser. The second guide surface 7230 is perpendicular to the optical axis direction of the second laser L2 incident to the prism 7201, the angle between the extension plane of the first guide surface 7210 and the second guide surface 7230 is α, and α is an acute angle; the distance between the center of the first light spot M1 and the center of the second light spot M2 is d, which satisfies the following formula.

[0096] wherein f is the equivalent focal length of the collection lens assembly 520, n is the refractive index of the prism 7201, m is the size of the mixed fluorescent light, which is the mixed light of the first fluorescent light F1 and the second fluorescent light F2, in the radial direction of the color wheel 540. The related derivation process of the formula d = f*tan[arcsin(n*sinα)-α] can be referred to the related description in the foregoing description, and will not be described herein.

[0097] In other possible embodiments, referring to FIG. 12, which is another schematic diagram of the laser light path between the prism 7201 and the color wheel 540, the guide 30 is not shown in FIG. 12 because the guide 30 plays a folding role for the laser. The first guide surface 7210 and the second guide surface 7230 are symmetrically arranged about the optical axis of the prism 7201, and since the prism 7201 in this embodiment has an axial symmetry structure, the assembly convenience of the prism 7201 can be improved.

[0098] wherein an included angle value between the first guide surface 7210 and a specified plane is a, a is an acute angle, and the specified plane N is perpendicular to an optical axis of the prism 7201. Of course, a here can also be an included angle value between the second guide surface 7230 and the specified plane. A distance between a center of the first light spot M1 and a center of the second light spot M2 is d, and d satisfies:

[0099] wherein f is an equivalent focal length of the collection lens assembly 520, n is a refractive index of the prism 7201, m is a size of mixed fluorescent light, which is mixed light of the first fluorescent light F1 and the second fluorescent light F2, in a radial direction of the color wheel 540, incident to the combining member 30. The related derivation process of the formula d = 2f*tan[arcsin(n*sin a)-a] can be referred to the related introduction in the foregoing description, and will not be described here again. Since the first laser L1 and the second laser L2 are refracted under the action of the prism 7201 in the embodiment, and the overall optical path of the two light beams is approximately axisymmetric, compared with the optical paths in FIG. 6 and FIG. 11, the formula corresponding to the formula d in the embodiment needs to be multiplied by a coefficient 2.

[0100] It needs to be explained here that since the first fluorescent light F1 and the second fluorescent light F2 reflected from the color wheel 540 are mostly overlapped, it means that the spot size of the mixed fluorescent light can be approximately equal to twice the size of a single laser spot. Therefore, under the condition that m, f and n are known, the range of the wedge angle a can be determined by the above formula to ensure that the first laser L1 and the second laser L2 adjusted by the prism 7201 can be correspondingly incident to the regions where the first fluorescent ring 5410 and the second fluorescent ring 5430 are located, avoiding the occurrence of color crosstalk.

[0101] In the embodiment shown in FIG. 10, the light guiding module 70 can also include a second dual compound eye lens 790, which is arranged between the first laser light source 10 and the prism 7201 and located on the optical path of the first laser L1 and the second laser L2. The second dual compound eye lens 790 is used to homogenize the first laser L1 and the second laser L2 to improve the uniformity of the corresponding light spot energy of the first laser L1 and the second laser L2.

[0102] In some other possible embodiments, the second dual compound eye lens 790 can also be integrated in the form of a microlens array on the light-incoming surface and the light-outgoing surface of the prism 7201 to improve the overall integration of the light guiding module 70. The specific implementation mode can be referred to the related introduction in the embodiment shown in FIG. 7, and the corresponding features in the embodiment shown in FIG. 7 can be combined into the present embodiment without conflict.

[0103] Of course, the light guide module 70 in the embodiment shown in FIG. 10 can also adopt the implementation manner shown in FIG. 8 or FIG. 9, and the corresponding features in the embodiments shown in FIG. 8 or FIG. 9 can be combined into the present embodiment without conflicts.

[0104] In the present embodiment, the light source device 200 can further include a control module (not shown in the figure) electrically connected with the first laser light source 10 and the second laser light source 20 respectively. Specifically, the control module can be a controller, for example, a microcontroller unit (MCU); or the control module can be a control circuit integrated with a control chip.

[0105] In the present embodiment, the control module is configured to: in the case where the light source device 200 is in the projection mode, control the first laser light source 10 and the second laser light source 20 to emit the first laser light L1, the second laser light L2 and the third laser light L3 in sequence and time division; and in the case where the light source device 200 is in the illumination mode, control the first laser light source 10 and the second laser light source 20 to emit the first laser light L1, the second laser light L2 and the third laser light L3 simultaneously.

[0106] Specifically, the control module can receive a relevant control instruction to determine the working mode of the light source device 200, and in the case where the working mode is the projection mode, the first laser light L1, the second laser light L2 and the third laser light L3 are emitted in sequence and time division, so that the light source device 200 can generate the first fluorescent light F1, the second fluorescent light F2 and the third laser light L3 in sequence and time division, and the optical system 100 configured with the light source device 200 can modulate the first fluorescent light F1, the second fluorescent light F2 and the third laser light L3 in sequence to generate light rays carrying image information.

[0107] In some possible embodiments, in the case where the light source device 200 is in the projection mode, the control module can further control the working parameters of the first laser light source 10 and the second laser light source 20 to adjust the amplitude intensity of the first laser light L1, the second laser light L2 and the third laser light L3 respectively, and further adjust the fluorescent excitation efficiency of the first fluorescent light F1 and the second fluorescent light F2, so as to realize the adjustable brightness and color temperature in the projection mode, and enrich the application scenarios of the optical system 100.

[0108] In the case where the working mode is the illumination mode, the first laser light L1, the second laser light L2 and the third laser light L3 are emitted simultaneously, and the first fluorescent light F1, the second fluorescent light F2 and the third laser light L3 are combined to generate illumination light rays (i.e., specified light rays LD). Since the three laser lights are emitted simultaneously, the overall brightness of the illumination light rays can be improved. Of course, the control module can also adjust the amplitude intensity of the first laser light L1, the second laser light L2 and the third laser light L3 to realize the adjustable brightness and color temperature of the illumination light rays.

[0109] In the embodiment, the control module can realize the illumination mode and the projection mode respectively by adjusting the light-emitting modes of the first laser L1, the second laser L2 and the third laser L3 under the condition of using the same light source device 200, which enriches the application scenarios of the optical system 100 configured with the light source device 200, avoids the need to use two sets of light systems to realize the illumination mode and the projection mode respectively, and saves the hardware cost and the overall occupied space of the light source device 200.

[0110] Please refer to FIG. 13, the light source device 200 can further include a light compensation module 90, which is switchably arranged on the light path of the first laser L1 and the second laser L2 between the light guiding module 70 and the light combining piece 30. The light compensation module 90 can include a light compensation piece 920, which is used to adjust the optical axis of the laser incident to the light compensation module 90, so that the optical axis direction of the laser emitted via the light compensation piece 920 is the same as the optical axis direction of the laser incident to the light guiding module 70. That is, the light compensation module 90 in the embodiment is used to restore the optical axis deviation caused by the light guiding module 70. For example, in the case that the first laser L1 and the second laser L2 are incident to the light guiding module 70 as two parallel lasers, the first laser L1 and the second laser L2 emitted via the light compensation piece 920 are also two parallel lasers.

[0111] In addition, the light compensation module 90 is also used to respectively redistribute the spot energy corresponding to the first laser L1 and the second laser L2, so that the spot formed by the laser emitted via the light compensation module 90 on the color wheel 540 is located in the region where the first fluorescent ring 5410 and the second fluorescent ring 5430 are located.

[0112] In the embodiment shown in FIG. 13, in the case that the second laser light source 20 and the first laser light source 10 are respectively located on the opposite sides of the light combining piece 30, the first laser L1 will be incident to the region where the first fluorescent ring 5410 and the second fluorescent ring 5430 are located under the action of the light compensation module 90 to generate the first fluorescent light F1 and the second fluorescent light F2. Similarly, the second laser L2 will be incident to the region where the first fluorescent ring 5410 and the second fluorescent ring 5430 are located under the action of the light compensation module 90 to generate the first fluorescent light F1 and the second fluorescent light F2.

[0113] Therefore, in the case that the light compensation module 90 moves to the light path where the first laser L1 and the second laser L2 are located, the control module can selectively control at least one of the first laser L1 and the second laser L2 to exit, and simultaneously control the third laser L3 to exit, that is, under the action of the light combining member 30, mixed to form illumination light (for example, white light), so as to enrich the light output mode of the light source device 200 in the illumination mode. Since in the embodiment, only two lasers need to be emitted to realize the illumination mode, compared with the embodiment shown in FIG. 10, which needs to emit three lasers at the same time, the brightness and color temperature can be further adjusted, and the application scenarios of the optical system 100 are enriched.

[0114] Please refer to FIG. 14, the light guiding module 70 can include a prism 7201, which is arranged on the light path where the first laser L1 and the second laser L2 are located. The prism 7201 has a first guiding surface 7210 and a second guiding surface 7230, the first laser L1 exits via the first guiding surface 7210, and the second laser L2 exits via the second guiding surface 7230. That is, the first guiding surface 7210 and the second guiding surface 7230 are light exit surfaces of the prism 7201. Specifically, the first guiding surface 7210 and the second guiding surface 7230 are not coplanar, and the related description of the first guiding surface 7210 and the second guiding surface 7230 can refer to the related description in the embodiment shown in FIG. 10, which will not be repeated here.

[0115] Specifically, the light compensation member 920 can adopt a complementary structure to the prism 7201, and the light compensation member 920 can be a prism. The light compensation member 920 is arranged on the light path where the first laser L1 and the second laser L2 are located. The light compensation member 920 has a first compensation surface 9210 and a second compensation surface 9230, which are light entrance surfaces of the light compensation member 920. Among them, the first compensation surface 9210 is parallel to the first guiding surface 7210, the first laser L1 enters the light compensation member 920 via the first compensation surface 9210, the light exit surface of the light compensation member 920 is perpendicular to the optical axis of the first laser L1 entering the prism 7201, and the first compensation surface 9210 is used to refract the first laser L1 to restore the optical axis offset of the first laser L1 caused by the light guiding module 70.

[0116] The second compensation surface 9230 is parallel to the second guiding surface 7230, that is, the included angle between the first compensation surface 9210 and the second compensation surface 9230 is equal to the included angle between the first guiding surface 7210 and the second guiding surface 7230, the second laser L2 enters the light compensation member 920 via the second compensation surface 9230, and the second compensation surface 9230 is used to refract the second laser L2 to restore the optical axis offset of the second laser L2 caused by the light guiding module 70.

[0117] Please refer to FIG. 15, the second laser light source 20 and the first laser light source 10 are located at the same side of the light combining member 30, and the light compensation module 90 is switchably arranged on the light path of the first laser L1, the second laser L2 and the third laser L3 between the light guiding module 70 and the light combining member 30. The light compensation module 90 is also used for respectively redistributing the corresponding spot energy of the first laser L1, the second laser L2 and the third laser L3, so that the spot formed by the laser light emitted from the light compensation module 90 on the color wheel 540 is located in the area where the first fluorescent ring 5410, the second fluorescent ring 5430 and the transmission ring 5450 are located.

[0118] Specifically, the first laser L1 is incident to the area where the first fluorescent ring 5410, the second fluorescent ring 5430 and the transmission ring 5450 are located under the action of the light compensation module 90, part of the first laser L1 is used to generate the first fluorescent light F1 and the second fluorescent light F2, and the other part of the first laser L1 is transmitted through the transmission ring 5450 to participate in light combination. The second laser L2 and the third laser L3 are the same. Therefore, in the case that the light compensation module 90 moves to the light path of the first laser L1, the second laser L2 and the third laser L3, the control module can selectively control at least one of the first laser L1, the second laser L2 and the third laser L3 to be emitted, that is, the mixed illumination light (for example, white light) can be formed under the action of the light combining member 30 to enrich the light emitting mode of the light source device 200 in the illumination mode. Since in this embodiment, only one laser light needs to be emitted to realize the illumination mode, compared with the embodiment shown in FIG. 10, which needs to emit three laser lights at the same time, the brightness and color temperature can be further adjusted, and the application scene of the optical system 100 is enriched.

[0119] Please refer to FIG. 16, the prism 7201 also has a third guide surface 7250, the third laser L3 is emitted through the third guide surface 7250, and the related description about the third guide surface 7250 can refer to the related description in the embodiment shown in FIG. 4, which will not be repeated here.

[0120] The light compensation member 920 has a third compensation surface 9250, wherein the second compensation surface 9230 is perpendicular to the optical axis direction of the second laser L2 incident to the prism 7201, so that when the second laser L2 is incident from the light compensation member 920, the optical axis direction of the second laser L2 remains unchanged. The first compensation surface 9210 and the third compensation surface 9250 are respectively located on the opposite sides of the second compensation surface 9230, and the first compensation surface 9210 and the third compensation surface 9250 can be axially symmetrical about the central axis of the light compensation member 920.

[0121] Specifically, the third compensation surface 9250 is parallel to the third guide surface 7250, the third laser L3 is incident to the light compensation member 920 via the third compensation surface 9250, and the third compensation surface 9250 is configured to refract the third laser L3 to restore the optical axis offset of the third laser L3 caused by the light guide module 70.

[0122] Referring back to FIG. 13, the light compensation module 90 can further include a relay lens 940 disposed between the light compensation member 920 and the light combination member 30 and located on the optical path of the first laser L1 and the second laser L2. The relay lens 940 is configured to perform beam shaping on the first laser L1 and the second laser L2 to improve the energy utilization efficiency of the first laser L1 and the second laser L2. In the embodiment shown in FIG. 15, the relay lens 940 is also located on the optical path of the third laser L3 and performs beam shaping on the third laser L3.

[0123] The embodiment provides a light source device 200 and an optical system 100 configured with the light source device 200. The light source device 200 can include a first laser light source 10, a light combination member 30, a fluorescent module 50, and a light guide module 70. The first laser light source 10 is configured to generate a first laser L1 and a second laser L2. The light combination member 30 is disposed on the optical path of the first laser L1 and the second laser L2 and is configured to guide the first laser L1 and the second laser L2 to the fluorescent module 50. The fluorescent module 50 can include a collection lens assembly 520 and a color wheel 540, which are sequentially disposed on the optical path of the first laser L1 and the second laser L2. The color wheel 540 can include a first fluorescent ring 5410 and a second fluorescent ring 5430 concentrically disposed. The first fluorescent ring 5410 is configured to generate a first fluorescent light F1, and the second fluorescent ring 5430 is configured to generate a second fluorescent light F2. The first fluorescent light F1 and the second fluorescent light F2 are sequentially reflected by the color wheel 540 and transmitted by the collection lens assembly 520 and then incident to the light combination member 30. The first fluorescent light F1 and the second fluorescent light F2 are of different colors. For example, the first fluorescent ring 5410 can be a red fluorescent powder ring, and the second fluorescent ring 5430 can be a green fluorescent powder ring, that is, the first fluorescent light F1 is red fluorescent light, and the second fluorescent light F2 is green fluorescent light.

[0124] Therefore, the color wheel 540 in the embodiment adopts a multi-ring structure of different colors, for example, the first fluorescent ring 5410 can be used as the inner ring of the color wheel 540, and the second fluorescent ring 5430 can be used as the outer ring of the color wheel 540, so that the color wheel 540 does not need to be synchronized when it starts to rotate, solving the problem of long synchronization time of the color wheel 540 in the case of adopting the RGB three-segment structure, so as to improve the starting speed of the light source device 200. In addition, the color wheel 540 in the embodiment can also effectively solve the problem of picture flicker caused by color wheel stall, and ensure that the optical system 100 configured with the light source device 200 can work smoothly.

[0125] In addition, since the collecting lens assembly 520 is arranged between the color wheel 540 and the light combining member 30, the collecting lens assembly 520 is used to converge the first fluorescent light F1 and the second fluorescent light F2 reflected by the color wheel 540, so as to improve the utilization efficiency of fluorescent light energy. At the same time, the collecting lens assembly 520 is also located on the light path of the first laser L1 and the second laser L2, and plays a converging role on the first laser L1 and the second laser L2.

[0126] In order to avoid the first laser L1 and the second laser L2 converging to the same area of the color wheel 520 (for example, the area where the first fluorescent ring 5410 is located) under the action of the collecting lens assembly 520, the light guiding module 70 is arranged between the first laser light source 10 and the light combining member 30 in the embodiment of the present application. The light guiding module 70 is located on the light path of at least one of the first laser L1 and the second laser L2, and the light guiding module 70 is used to adjust the optical axis of the laser incident to the light guiding module 70, so that the first laser L1 can be accurately incident to the area where the first fluorescent ring 5410 is located, and the second laser L2 can be accurately incident to the area where the second fluorescent ring 5430 is located, so as to ensure that the first fluorescent light F1 and the second fluorescent light F2 can be excited smoothly, and ensure the normal work of the light source device 200.

[0127] In the present application, some terms are used in the specification and claims to refer to certain components. Those skilled in the art should understand that the same components may be referred to by different names by hardware manufacturers. The specification and claims do not distinguish components by name difference, but by functional difference. As mentioned throughout the specification and claims, "including" is an open term, which should be interpreted as "including but not limited to"; "approximately" means that those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0128] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", and "outer" indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of simplifying the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0129] In the present application, unless otherwise explicitly specified or limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or a communication within two elements, or it can be only a surface contact. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0130] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples, without contradiction.

[0131] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0132] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light source apparatus, characterized by comprising: The light source device comprises a first laser light source, a light combining member, a fluorescent module and a light guiding module; the first laser light source is used to generate a first laser and a second laser; The light combining member is arranged on a light path of the first laser and the second laser, and is used to guide the first laser and the second laser to the fluorescent module; the fluorescent module comprises a collecting lens assembly and a color wheel, and the collecting lens assembly and the color wheel are arranged on the light path of the first laser and the second laser in sequence; The color wheel comprises a first fluorescent ring and a second fluorescent ring arranged concentrically, the first fluorescent ring is used to generate a first fluorescent light, the second fluorescent ring is used to generate a second fluorescent light, the first fluorescent light and the second fluorescent light are sequentially reflected by the color wheel and transmitted by the collecting lens assembly, and then are incident on the light combining member, and the first fluorescent light and the second fluorescent light are of different colors; The light guiding module is arranged between the first laser light source and the light combining member, and is located on a light path of at least one of the first laser and the second laser, and is used to adjust an optical axis of laser light incident on the light guiding module, so that the first laser is incident on a region where the first fluorescent ring is located, and the second laser is incident on a region where the second fluorescent ring is located.

2. The light source apparatus according to claim 1, wherein The light source device further comprises a second laser light source, the second laser light source and the first laser light source are located on the same side of the light combining member; the second laser light source is used to generate a third laser; The light combining member is further arranged on a light path of the third laser, and is used to guide the third laser to the color wheel; the collecting lens assembly is further arranged on the light path of the third laser; The color wheel further comprises a transmission ring, the transmission ring, the first fluorescent ring and the second fluorescent ring are arranged concentrically, and the transmission ring is used to transmit laser light; The fluorescent module further comprises a guiding assembly, the guiding assembly is arranged on a light path of laser light transmitted by the transmission ring, and is used to guide the laser light transmitted by the transmission ring to the light combining member; The light guiding module is located on a light path of at least two of the first laser, the second laser and the third laser, so that the third laser is incident on a region where the transmission ring is located.

3. The light source apparatus according to claim 2, wherein The light guiding module comprises a light guiding assembly, the light guiding assembly is located on a light path of the first laser, the second laser and the third laser; The light guiding assembly is provided with a first guiding surface, a second guiding surface and a third guiding surface, the first laser is emitted to the light combining member via the first guiding surface, the second laser is emitted to the light combining member via the second guiding surface, and the third laser is emitted to the light combining member via the third guiding surface; the first guiding surface, the second guiding surface and the third guiding surface are not coplanar.

4. The light source apparatus according to claim 3, wherein The light guiding assembly comprises a prism, the first guiding surface, the second guiding surface and the third guiding surface are light emitting surfaces of the prism respectively; The second guiding surface is perpendicular to a direction of an optical axis of the second laser incident on the prism; the first guiding surface and the third guiding surface are located on opposite sides of the second guiding surface respectively.

5. The light source apparatus according to claim 4, wherein The first fluorescent ring and the second fluorescent ring are adjacent, the first laser is incident to the first fluorescent ring to form a first light spot, and the second laser is incident to the second fluorescent ring to form a second light spot; An included angle between an extension plane of the first guide surface and the second guide surface is α, the α is an acute angle; a distance between a center of the first light spot and a center of the second light spot is d, the d satisfies: Wherein, the f is the equivalent focal length of the collection lens assembly, the n is the refractive index of the prism, the m is the size of the mixed fluorescent light incident to the light mixing piece in the radial direction of the color wheel, and the mixed fluorescent light is the mixed light of the first fluorescent light and the second fluorescent light.

6. The light source apparatus according to claim 4, wherein The light guiding module further comprises a first double compound eye lens, which is arranged between the first laser light source and the prism and located on the light path of the first laser, the second laser and the third laser. The prism is further provided with an incident surface and an outgoing surface, which are located on opposite sides of the prism; and the light guiding assembly further comprises a plurality of microlens arrays, which are arranged on the incident surface and the outgoing surface of the prism.

7. The light source apparatus according to claim 3, wherein The light guiding assembly comprises a first reflecting element, a second reflecting element and a third reflecting element, the first guiding surface is the reflecting surface of the first reflecting element, the second guiding surface is the reflecting surface of the second reflecting element, and the third guiding surface is the reflecting surface of the third reflecting element. The light guiding module further comprises a first single compound eye lens, which is arranged between the light guiding assembly and the light mixing piece and located on the light path of the first laser, the second laser and the third laser. One side of the first single compound eye lens provided with a microlens array is arranged towards the light mixing piece.

8. The light source apparatus according to claim 2, wherein The first laser, the second laser and the third laser are incident to the light guiding module along the same direction, and the first laser and the third laser are located on opposite sides of the second laser. The light guiding module comprises a second single compound eye lens and a third single compound eye lens, which are spaced apart to form a gap; the second single compound eye lens is arranged on the light path of the first laser and used for adjusting the optical axis of the first laser, and one side of the second single compound eye lens provided with a microlens array is arranged towards the light mixing piece; The third single compound eye lens is arranged on the light path of the third laser and used for adjusting the optical axis of the third laser, and one side of the third single compound eye lens provided with a microlens array is arranged towards the light mixing piece; The second laser is incident to the light mixing piece after passing through the gap.

9. The light source apparatus according to claim 1, wherein The light source device further comprises a second laser light source, which is located on opposite sides of the light mixing piece with the first laser light source; and the second laser light source is used for generating a third laser. The light mixing piece is further arranged on the light path of the third laser and used for light mixing of the third laser, the first fluorescent light and the second fluorescent light.

10. The light source apparatus according to claim 9, wherein The first fluorescent ring and the second fluorescent ring are adjacent, the first laser is incident to the first fluorescent ring to form a first light spot, and the second laser is incident to the second fluorescent ring to form a second light spot; and the first light spot and the second light spot are spaced apart. The light guide module comprises a prism, the prism has a first guide surface and a second guide surface, the first laser is emitted to the light combining piece via the first guide surface, the second laser is emitted to the light combining piece via the second guide surface, and the first guide surface and the second guide surface are not coplanar.

11. The light source apparatus according to claim 10, wherein The second guide surface is perpendicular to the optical axis direction of the second laser light incident to the prism; an included angle between the extension plane of the first guide surface and the second guide surface is α, and the α is an acute angle; a distance between the center of the first light spot and the center of the second light spot is d, and the d satisfies: Wherein, the f is the equivalent focal length of the collection lens assembly, the n is the refractive index of the prism, and the m is the size of the mixed fluorescence incident to the light combining piece in the radial direction of the color wheel, and the mixed fluorescence is the mixed light of the first fluorescence and the second fluorescence.

12. The light source apparatus according to claim 10, wherein The first guide surface and the second guide surface are symmetrically arranged about an optical axis of the prism; an included angle between the first guide surface and a specified plane is α, the α is an acute angle, and the specified plane is perpendicular to the optical axis of the prism; a distance between the center of the first light spot and the center of the second light spot is d, and the d satisfies: Wherein, the f is the equivalent focal length of the collection lens assembly, the n is the refractive index of the prism, and the m is the size of the mixed fluorescence incident to the light combining piece in the radial direction of the color wheel, and the mixed fluorescence is the mixed light of the first fluorescence and the second fluorescence.

13. The light source apparatus according to claim 10, wherein The light guide module further comprises a second double compound eye lens, which is arranged between the first laser light source and the prism and located on the light path of the first laser and the second laser.

14. The light source apparatus according to claim 9, wherein The second laser light source comprises a laser generator, a scattering element and a compound eye lens, and the laser generator is used to generate the third laser; The scattering element is arranged between the laser generator and the light combining piece and located on the light path of the third laser, and is used to scatter the third laser; The compound eye lens is arranged between the scattering element and the light combining piece and located on the light path of the third laser, and is used to homogenize the third laser.

15. The light source apparatus according to any one of claims 1 to 14, wherein The light source device further comprises a light compensation module, which is switchably arranged on the light path of the first laser and the second laser between the light guide module and the light combining piece; The light compensation module comprises a light compensation element, which is used to adjust the optical axis of the laser incident to the light compensation module, so that the optical axis direction of the laser emitted via the light compensation element is the same as the optical axis direction of the laser incident to the light guide module.

16. The light source apparatus according to claim 15, wherein The light spot formed by the laser emitted via the light compensation module on the color wheel is located in the area where the first fluorescent ring and the second fluorescent ring are located.

17. The light source apparatus according to claim 15, wherein The light guide module comprises a prism, the prism is arranged on the light path of the first laser and the second laser; the prism has a first guide surface and a second guide surface, the first laser is emitted via the first guide surface, and the second laser is emitted via the second guide surface; the first guide surface and the second guide surface are not coplanar; The light compensation element has a first compensation surface and a second compensation surface, the first compensation surface is parallel to the first guide surface, and the first laser is incident to the light compensation element via the first compensation surface; the second compensation surface is parallel to the second guide surface, and the second laser is incident to the light compensation element via the second compensation surface.

18. The light source apparatus according to claim 17, wherein The light compensation module further comprises a relay lens, which is arranged between the light compensation element and the light combining piece and located on the light path of the first laser and the second laser.

19. The light source apparatus according to any one of claims 2 to 14, wherein The light source device further comprises a control module electrically connected with the first laser light source and the second laser light source respectively; the control module is configured to: In the case that the light source device is in a projection mode, the control module controls the first laser light source and the second laser light source to emit the first laser, the second laser and the third laser in sequence and in time division; In the case that the light source device is in an illumination mode, the control module controls the first laser light source and the second laser light source to emit the first laser, the second laser and the third laser simultaneously.

20. An optical system characterized by, comprising: The light source device according to any one of claims 1 to 19, wherein the light source device is used to generate a specified light; and a light modulator arranged on an optical path of the specified light.

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